Prepare release

This reverts commit 75c3619898.

.cspell.json

@@ -0,0 +1,48 @@
+{
+  "language": "en",
+  "words": [
+    "thomasnordquist",
+    "nowrap",
+    "subheader",
+    "basepath",
+    "webdriverio",
+    "repo",
+    "hexagonalize",
+    "pixelize",
+    "Transistions",
+    "squashfs",
+    "squashfs",
+    "provisionprofile",
+    "Nsis",
+    "Appx",
+    "Hashable",
+    "clickaway",
+    "Resizer",
+    "Subnodes",
+    "Unmount",
+    "Monokai",
+    "plottable",
+    "snackbar",
+    "webdriverio",
+    "prismjs",
+    "Nordquist",
+    "debounced",
+    "mosquitto",
+    "snapcraft",
+    "unsquashfs",
+    "armv",
+    "livingroom",
+    "selectall",
+    "toggledevtools",
+    "Octo",
+    "zigbee",
+    "memoization",
+    "submenu",
+    "AGPL",
+    "Oooooops",
+    "DEVTOOLS",
+    "mixins",
+    "Explorerdmg",
+    "heapsnapshot"
+  ]
+}

.eslintrc.json

@@ -0,0 +1,17 @@
+{
+    "env": {
+        "browser": true,
+        "commonjs": true,
+        "es6": true
+    },
+    "extends": "eslint:recommended",
+    "globals": {
+        "Atomics": "readonly",
+        "SharedArrayBuffer": "readonly"
+    },
+    "parserOptions": {
+        "ecmaVersion": 2018
+    },
+    "rules": {
+    }
+}

.gitignore

@@ -2,6 +2,7 @@ node_modules
 backend/coverage
 backend/.nyc_output
 build
+/dist
 .DS_Store
 test.dot
 test.png

.prettierignore

@@ -0,0 +1,2 @@
+node_modules
+build

.travis.yml

@@ -1,5 +1,8 @@
 language: node_js
 
+services:
+  - xvfb
+
 cache:
   directories:
   - node_modules
@@ -14,13 +17,22 @@ os:
   - linux
   - osx
 
+dist: xenial
+
+services:
+  - docker
+
 install:
-  - npm install
-  - if [[ "$TRAVIS_OS_NAME" == "linux" ]]; then sudo apt-get install snapd && sudo snap install snapcraft --classic; fi
+  - yarn install
+  - if [[ "$TRAVIS_OS_NAME" == "linux" ]]; then sudo apt-get update && sudo apt-get -y install snap squashfs-tools && sudo snap install snapcraft --classic; fi;
 
 script:
-  - npm run build
-  - npm run prepare-release
-  - if [[ "$TRAVIS_OS_NAME" == "linux" ]]; then npm run package -- linux; fi
-  - if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then npm run package -- mac; fi
-  - if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then npm run package -- win; fi
+  - yarn run build
+  - yarn lint
+  - yarn test
+  - export TRAVIS_BUILD_NUMBER="" # Override travis build number since it is uses for tagging the binary version https://github.com/electron-userland/electron-builder/issues/3730
+  - if [[ "$TRAVIS_OS_NAME" == "linux" ]]; then docker run -e GH_TOKEN=$GH_TOKEN -e GIT_TAG=$TRAVIS_TAG --rm -v `pwd`:/app thomasnordquist/ui-test-recording-env sh -c "cd app && docker/testMounted.sh"; fi
+  - if [[ "$TRAVIS_TAG" != "" ]]; then yarn run prepare-release; fi
+  - if [[ "$TRAVIS_OS_NAME" == "linux" ]] && [[ "$TRAVIS_TAG" != "" ]]; then yarn run package linux; fi
+  - if [[ "$TRAVIS_OS_NAME" == "osx" ]] && [[ "$TRAVIS_TAG" != "" ]]; then yarn run package -- mac; fi
+  - if [[ "$TRAVIS_OS_NAME" == "osx" ]] && [[ "$TRAVIS_TAG" != "" ]]; then CSC_LINK="" yarn run package -- win; fi

.vscode/settings.json

@@ -0,0 +1,7 @@
+{
+  "editor.formatOnSave": true,
+  "files.exclude": {
+    "**/node_modules": true,
+    "build/": true
+  }
+}

Changelog.md

@@ -0,0 +1,12 @@
+# 0.2.3
+
+  - Highlight differences in the last received message with a "diff" view
+  - Magnify app content with "Ctrl +", "Ctrl -", "Ctrl 0"
+  - Make user interactions more predictable by removing "select topic on mouse over"
+  - Add "Quick Preview" setting, to enable topic selection on mouse over
+  - Add JSON formatter
+  - Show error when connection to the mqtt broker is lost
+  - Fix bug where mqtt explorer resets the tree after a reconnect
+  - Fix MQTT-Client id
+
+# 0.2.0

LICENSE.md

@@ -0,0 +1,158 @@
+## creative commons
+
+# Attribution-NoDerivatives 4.0 International
+
+Creative Commons Corporation (“Creative Commons”) is not a law firm and does not provide legal services or legal advice. Distribution of Creative Commons public licenses does not create a lawyer-client or other relationship. Creative Commons makes its licenses and related information available on an “as-is” basis. Creative Commons gives no warranties regarding its licenses, any material licensed under their terms and conditions, or any related information. Creative Commons disclaims all liability for damages resulting from their use to the fullest extent possible.
+
+### Using Creative Commons Public Licenses
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+Creative Commons public licenses provide a standard set of terms and conditions that creators and other rights holders may use to share original works of authorship and other material subject to copyright and certain other rights specified in the public license below. The following considerations are for informational purposes only, are not exhaustive, and do not form part of our licenses.
+
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+
+* __Considerations for the public:__ By using one of our public licenses, a licensor grants the public permission to use the licensed material under specified terms and conditions. If the licensor’s permission is not necessary for any reason–for example, because of any applicable exception or limitation to copyright–then that use is not regulated by the license. Our licenses grant only permissions under copyright and certain other rights that a licensor has authority to grant. Use of the licensed material may still be restricted for other reasons, including because others have copyright or other rights in the material. A licensor may make special requests, such as asking that all changes be marked or described. Although not required by our licenses, you are encouraged to respect those requests where reasonable. [More considerations for the public](http://wiki.creativecommons.org/Considerations_for_licensors_and_licensees#Considerations_for_licensees).
+
+## Creative Commons Attribution-NoDerivatives 4.0 International Public License
+
+By exercising the Licensed Rights (defined below), You accept and agree to be bound by the terms and conditions of this Creative Commons Attribution-NoDerivatives 4.0 International Public License ("Public License"). To the extent this Public License may be interpreted as a contract, You are granted the Licensed Rights in consideration of Your acceptance of these terms and conditions, and the Licensor grants You such rights in consideration of benefits the Licensor receives from making the Licensed Material available under these terms and conditions.
+
+### Section 1 – Definitions.
+
+a. __Adapted Material__ means material subject to Copyright and Similar Rights that is derived from or based upon the Licensed Material and in which the Licensed Material is translated, altered, arranged, transformed, or otherwise modified in a manner requiring permission under the Copyright and Similar Rights held by the Licensor. For purposes of this Public License, where the Licensed Material is a musical work, performance, or sound recording, Adapted Material is always produced where the Licensed Material is synched in timed relation with a moving image.
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+
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+
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+
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+
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+
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+
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+
+### Section 3 – License Conditions.
+
+Your exercise of the Licensed Rights is expressly made subject to the following conditions.
+
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+
+   1. If You Share the Licensed Material, You must:
+
+       A. retain the following if it is supplied by the Licensor with the Licensed Material:
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+
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+
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+
+         v. a URI or hyperlink to the Licensed Material to the extent reasonably practicable;
+
+       B. indicate if You modified the Licensed Material and retain an indication of any previous modifications; and
+
+       C. indicate the Licensed Material is licensed under this Public License, and include the text of, or the URI or hyperlink to, this Public License.
+
+       For the avoidance of doubt, You do not have permission under this Public License to Share Adapted Material.
+
+   2. You may satisfy the conditions in Section 3(a)(1) in any reasonable manner based on the medium, means, and context in which You Share the Licensed Material. For example, it may be reasonable to satisfy the conditions by providing a URI or hyperlink to a resource that includes the required information.
+
+   3. If requested by the Licensor, You must remove any of the information required by Section 3(a)(1)(A) to the extent reasonably practicable.
+
+### Section 4 – Sui Generis Database Rights.
+
+Where the Licensed Rights include Sui Generis Database Rights that apply to Your use of the Licensed Material:
+
+a. for the avoidance of doubt, Section 2(a)(1) grants You the right to extract, reuse, reproduce, and Share all or a substantial portion of the contents of the database, provided You do not Share Adapted Material;
+
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+
+c. You must comply with the conditions in Section 3(a) if You Share all or a substantial portion of the contents of the database.
+
+For the avoidance of doubt, this Section 4 supplements and does not replace Your obligations under this Public License where the Licensed Rights include other Copyright and Similar Rights.
+
+### Section 5 – Disclaimer of Warranties and Limitation of Liability.
+
+a. __Unless otherwise separately undertaken by the Licensor, to the extent possible, the Licensor offers the Licensed Material as-is and as-available, and makes no representations or warranties of any kind concerning the Licensed Material, whether express, implied, statutory, or other. This includes, without limitation, warranties of title, merchantability, fitness for a particular purpose, non-infringement, absence of latent or other defects, accuracy, or the presence or absence of errors, whether or not known or discoverable. Where disclaimers of warranties are not allowed in full or in part, this disclaimer may not apply to You.__
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+
+### Section 6 – Term and Termination.
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+a. This Public License applies for the term of the Copyright and Similar Rights licensed here. However, if You fail to comply with this Public License, then Your rights under this Public License terminate automatically.
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+b. Where Your right to use the Licensed Material has terminated under Section 6(a), it reinstates:
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+
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+>
+> Creative Commons may be contacted at creativecommons.org
+

Readme.md

@@ -0,0 +1,66 @@
+# [MQTT Explorer](https://mqtt-explorer.com)
+
+[![Downloads](https://img.shields.io/github/release/thomasnordquist/mqtt-explorer.svg)](https://travis-ci.org/thomasnordquist/MQTT-Explorer/releases)
+[![Downloads](https://img.shields.io/github/downloads/thomasnordquist/mqtt-explorer/total.svg)](https://travis-ci.org/thomasnordquist/MQTT-Explorer/releases)
+[![Build_Status](https://travis-ci.org/thomasnordquist/MQTT-Explorer.svg?branch=master)](https://travis-ci.org/thomasnordquist/MQTT-Explorer)
+[![Build status](https://ci.appveyor.com/api/projects/status/c35tkm29rm4m5364/branch/master?svg=true)](https://ci.appveyor.com/project/thomasnordquist/mqtt-explorer/branch/master)
+[![Codacy Badge](https://api.codacy.com/project/badge/Grade/47b26e03fce543ceac7914214482334a)](https://app.codacy.com/app/thomasnordquist/MQTT-Explorer?utm_source=github.com&utm_medium=referral&utm_content=thomasnordquist/MQTT-Explorer&utm_campaign=Badge_Grade_Dashboard)
+
+|   |   |   |
+|:---:|:---:|:---:|
+|[![screen_composite](https://mqtt-explorer.com/img/screen-composite_small.png)](https://mqtt-explorer.com/img/screen-composite.png)|[![screen2_small](https://mqtt-explorer.com/img/screen2_small.png)](https://mqtt-explorer.com/img/screen2.png)|[![screen3_small](https://mqtt-explorer.com/img/screen3_small.png)](https://mqtt-explorer.com/img/screen3.png)|
+
+# The App has moved to [mqtt-explorer.com](https://mqtt-explorer.com)
+MQTT Explorer is a comprehensive and easy-to-use MQTT Client.  
+Downloads can be found at the link above.
+
+This page is dedicated to its development.
+Pull-Requests and error reports are welcome.
+
+## Run from sources
+
+```bash
+yarn
+yarn build
+yarn start
+```
+
+## Develop
+
+Launch Application
+```bash
+yarn
+yarn dev
+```
+
+The `app` directory contains all the rendering logic, the `backend` directory currently contains the models, tests, connection management, `src` contains all the electron bindings. [mqttjs](https://github.com/mqttjs/MQTT.js) is used to facilitate communication to MQTT brokers.
+
+## Automated Tests
+
+To achieve a reliable product automated tests run regularly on travis.
+
+  - Data model
+  - MQTT integration
+  - UI-Tests (The demo is a recorded ui test)
+
+## Run UI-tests
+A [mosquitto](https://mosquitto.org/) MQTT broker is required to run the ui-tests.
+
+Run tests with
+```bash
+# Run chromedriver in a separate terminal session
+./node_modules/.bin/chromedriver --url-base=wd/hub --port=9515 --verbose
+```
+
+Compile and execute tests
+```bash
+npm run build
+node dist/src/spec/webdriverio.js
+```
+
+## License
+
+![CC-BY-ND 4.0](https://img.shields.io/badge/License-CC%20BY--ND%204.0-blue.svg)  
+[CC-BY-ND 4.0](https://creativecommons.org/licenses/by-nd/4.0/)
+
+The license is a little restrictive to distributing derived work, this may change in the future if the interest arises or more people work on this project.

app/index.html

@@ -1,41 +1,182 @@
 <!DOCTYPE html>
 <html>
-    <head>
-        <meta charset="UTF-8" />
-        <title>MQTT-Explorer</title>
-        <style>
-          body, html {
-            margin: 0;
-            padding: 0;
-          }
-          @keyframes example {
-            0%   {background-color: inherit;}
-            25%  {background-color: #3f51b5;}
-            50%  {background-color: #3f51b5;}
-            100% {background-color: inherit;}
-          }
+  <head>
+    <meta charset="UTF-8" />
+    <meta name="viewport" content="minimum-scale=1, initial-scale=1, width=device-width, shrink-to-fit=no" />
+    <title>MQTT Explorer</title>
+    <script src="./bugtracking.bundle.js"></script>
 
-          ::-webkit-scrollbar {
-            width: 8px;
-          }
+    <style>
+      body,
+      html {
+        margin: 0;
+        padding: 0;
+      }
 
-          ::-webkit-scrollbar-corner {
-            background-color: rgba(0, 0, 0, 0.0);
-          }
+      [tabindex] {
+        outline: none;
+      }
 
-          ::-webkit-scrollbar-track {
-              -webkit-box-shadow: inset 0 0 6px rgba(30,30,30,0.3);
-          }
+      @keyframes updateDark {
+        0% {
+          background-color: none;
+        }
+        25% {
+          background-color: #4f5781;
+        }
+        50% {
+          background-color: #4f5781;
+        }
+        100% {
+          background-color: none;
+        }
+      }
 
-          ::-webkit-scrollbar-thumb {
-              background-color: rgba(140,140,140,0.8);
-              #-webkit-box-shadow: inset 0 0 6px rgba(0,0,0,0.8);
-          }
-        </style>
-        <script src="http://localhost:35729/livereload.js"></script>
-    </head>
-    <body>
-        <div id="app" style="font:-webkit-control"></div>
-        <script src="./build/bundle.js"></script>
-    </body>
+      @keyframes updateLight {
+        0% {
+          background-color: none;
+          color: inherit;
+        }
+        25% {
+          background-color: #c0c8c0;
+          color: #000;
+        }
+        50% {
+          background-color: #c0c8c0;
+          color: #000;
+        }
+        100% {
+          background-color: none;
+          color: inherit;
+        }
+      }
+
+      ::-webkit-scrollbar {
+        width: 8px;
+        height: 8px;
+      }
+
+      ::-webkit-scrollbar-corner {
+        background-color: rgba(0, 0, 0, 0);
+      }
+
+      ::-webkit-scrollbar-track {
+        -webkit-box-shadow: inset 0 0 6px rgba(60, 60, 60, 0.5);
+        background-color: rgba(140, 140, 140, 0.1);
+      }
+
+      ::-webkit-scrollbar-thumb {
+        background-color: rgba(140, 140, 140, 0.8);
+      }
+    </style>
+    <style>
+      .Resizer {
+        background: rgba(200, 200, 200, 0);
+        z-index: 10;
+        -moz-box-sizing: border-box;
+        -webkit-box-sizing: border-box;
+        box-sizing: border-box;
+        -moz-background-clip: padding;
+        -webkit-background-clip: padding;
+        background-clip: padding-box;
+      }
+
+      .Resizer:hover {
+        -webkit-transition: all 0.3s ease-out;
+        transition: all 0.3s ease-out;
+      }
+
+      .Resizer.horizontal {
+        height: 10px;
+        margin: -10px 0 0 0;
+        border-top: 5px solid rgba(255, 255, 255, 0);
+        border-bottom: 5px solid rgba(255, 255, 255, 0);
+        cursor: row-resize;
+        width: 100%;
+      }
+
+      .Resizer.horizontal::before {
+        content: '•••';
+        display: inline-block;
+        vertical-align: middle;
+        text-align: center;
+        width: 100%;
+        margin-top: -22px;
+        color: #aaa;
+        opacity: 1;
+      }
+
+      .Resizer.horizontal:hover {
+        border-top: 5px solid rgba(120, 120, 120, 0.3);
+        border-bottom: 5px solid rgba(120, 120, 120, 0.3);
+      }
+
+      .Resizer.vertical {
+        width: 2px;
+        margin: 0px -8px 0px 0px;
+        border-left: 0px solid rgba(128, 128, 128, 0);
+        border-right: 8px solid rgba(128, 128, 128, 0);
+        cursor: col-resize;
+      }
+
+      .Resizer.vertical::before {
+        content: '•••';
+        margin-left: -11px;
+        height: 3em;
+        margin-top: calc(50vh - 32px);
+        display: inline-block;
+        vertical-align: middle;
+        text-align: center;
+        color: #aaa;
+        opacity: 1;
+        writing-mode: vertical-lr;
+        text-orientation: sideways;
+      }
+
+      .Resizer.vertical:hover {
+        border-left: 0px solid rgba(130, 130, 130, 0.3);
+        border-right: 8px solid rgba(140, 140, 140, 0.3);
+      }
+
+      .Resizer.disabled {
+        cursor: not-allowed;
+      }
+      .Resizer.disabled:hover {
+        border-color: transparent;
+      }
+
+      .example-enter {
+        opacity: 0;
+      }
+      .example-enter-active {
+        opacity: 1;
+        transition: opacity 300ms ease-in;
+      }
+      .example-exit {
+        opacity: 1;
+      }
+      .example-exit-active {
+        opacity: 0;
+        transition: opacity 300ms ease-in;
+      }
+    </style>
+  </head>
+  <body>
+    <div id="app" style="font:-webkit-control"></div>
+    <script>
+      function loadScript(path) {
+        var script = document.createElement('script')
+        script.src = path
+        document.head.appendChild(script)
+      }
+
+      document.addEventListener('DOMContentLoaded', onLoad(), false)
+      function onLoad() {
+        // <% _.forEach(htmlWebpackPlugin.files.js, function(file) { %>loadScript("<%- file %>");<% }); %>
+        // loadScript("<%= JSON.stringify(htmlWebpackPlugin) %>")
+      }
+    </script>
+    <% _.forEach(htmlWebpackPlugin.files.js, function(file) { %><script src="<%- file %>"></script
+    ><% }); %>
+  </body>
 </html>

app/package.json

@@ -4,41 +4,83 @@
   "description": "",
   "main": "index.js",
   "scripts": {
-    "build": "webpack --mode production"
+    "build": "yarn rebuild && webpack --mode production",
+    "dev": "node_modules/.bin/webpack-dev-server --mode development --progress",
+    "rebuild": "cd node_modules/heapdump && node-gyp rebuild --target=5.0.4 --arch=x64 --dist-url=https://atom.io/download/electron || echo Could not build heapdump; cd -"
   },
   "author": "",
-  "license": "ISC",
-  "devDependencies": {
-    "@material-ui/icons": "^3.0.1",
-    "@material-ui/lab": "^3.0.0-alpha.27",
-    "@types/react": "^16.7.18",
-    "@types/react-dom": "^16.0.11",
-    "@types/react-redux": "^6.0.12",
-    "react": "^16.7.0",
-    "react-dom": "^16.7.0",
-    "react-redux": "^6.0.0",
-    "redux": "^4.0.1",
-    "webpack-livereload-plugin": "^2.2.0"
-  },
+  "license": "CC-BY-ND-4.0",
   "dependencies": {
-    "@material-ui/core": "^3.7.1",
-    "@types/node": "^10.12.18",
-    "@types/sha1": "^1.1.1",
-    "@types/socket.io-client": "^1.4.32",
-    "@types/vis": "^4.21.9",
-    "awesome-typescript-loader": "^5.2.1",
-    "copy-text-to-clipboard": "^1.0.4",
-    "jquery": "^3.3.1",
+    "@material-ui/core": "^4",
+    "@material-ui/icons": "^4",
+    "@material-ui/lab": "^4.0.0-alpha",
+    "@material-ui/styles": "^4",
+    "@types/react-transition-group": "^2.9.2",
+    "axios": "^0.19.0",
+    "brace": "^0.11.1",
+    "compare-versions": "^3.4.0",
+    "copy-text-to-clipboard": "^2.1.0",
+    "d3": "^5.9.2",
+    "d3-shape": "^1.3.5",
+    "diff": "^4.0.1",
+    "dot-prop": "^5.0.0",
+    "electron-telemetry": "git+https://github.com/thomasnordquist/electron-telemetry.git#dist",
+    "file-loader": "^4.0.0",
+    "get-value": "^3.0.1",
+    "immutable": "^4.0.0-rc.12",
+    "js-base64": "^2.5.1",
+    "json-to-ast": "^2.1.0",
+    "lodash.debounce": "^4.0.8",
     "lodash.throttle": "^4.1.1",
+    "moment": "^2.24.0",
     "moving-average": "^1.0.0",
-    "react-ace": "^6.3.2",
-    "react-json-view": "^1.19.1",
+    "number-abbreviate": "^2.0.0",
+    "parse-duration": "^0.1.1",
+    "prismjs": "^1.15.0",
+    "react": "16.8",
+    "react-ace": "^7.0.1",
+    "react-dom": "^16.7.0",
+    "react-redux": "^7.0.3",
+    "react-resize-detector": "^4.1.4",
+    "react-split-pane": "^0.1.85",
+    "react-transition-group": "^4.1.1",
+    "react-vis": "^1.11.6",
+    "redux": "^4.0.1",
+    "redux-batched-actions": "^0.4.1",
+    "redux-thunk": "^2.3.0",
     "sha1": "^1.1.1",
     "socket.io-client": "^2.2.0",
+    "uuid": "^3.3.2"
+  },
+  "devDependencies": {
+    "@types/d3": "^5.7.2",
+    "@types/diff": "^4.0.1",
+    "@types/get-value": "^3.0.1",
+    "@types/node": "^12.0.4",
+    "@types/prismjs": "^1.9.1",
+    "@types/react": "^16.7.18",
+    "@types/react-dom": "^16.0.11",
+    "@types/react-redux": "^7.0.9",
+    "@types/react-resize-detector": "^4.0.1",
+    "@types/sha1": "^1.1.1",
+    "@types/socket.io-client": "^1.4.32",
+    "@types/uuid": "^3.4.4",
+    "@types/vis": "^4.21.9",
+    "awesome-typescript-loader": "^5.2.1",
+    "css-loader": "^3.0.0",
+    "hard-source-webpack-plugin": "^0.13.1",
+    "heapdump": "^0.3.12",
+    "html-webpack-plugin": "^4.0.0-beta.5",
+    "node-loader": "^0.6.0",
     "source-map-loader": "^0.2.4",
+    "style-loader": "^0.23.1",
     "typescript": "^3.2.2",
     "webpack": "^4.28.2",
+    "webpack-bundle-analyzer": "^3.0.3",
     "webpack-cli": "^3.1.2",
     "webpack-dev-server": "^3.1.14"
+  },
+  "peerDependencies": {
+    "electron": "^5.0.5"
   }
 }

app/src/App.tsx

@@ -1,109 +0,0 @@
-import * as React from 'react'
-import { connect } from 'react-redux'
-import * as q from '../../backend/src/Model'
-import CssBaseline from '@material-ui/core/CssBaseline'
-import { withStyles, Theme } from '@material-ui/core/styles'
-import Tree from './components/Tree/Tree'
-import TitleBar from './components/TitleBar'
-import Sidebar from './components/Sidebar/Sidebar'
-import Connection from './components/ConnectionSetup/Connection'
-import Settings from './components/Settings'
-import { AppState } from './reducers'
-
-interface State {
-  selectedNode?: q.TreeNode,
-  connectionId?: string
-}
-
-interface Props {
-  name: string
-  theme: Theme
-  settingsVisible: boolean
-}
-
-class App extends React.Component<Props, State> {
-  constructor(props: any) {
-    super(props)
-    this.state = {
-      selectedNode: undefined,
-    }
-  }
-
-  private getStyles(): {[s: string]: React.CSSProperties} {
-    const { theme } = this.props
-    const drawerWidth = 300
-    return {
-      left: {
-        backgroundColor: theme.palette.background.default,
-        color: theme.palette.text.primary,
-        height: 'calc(100vh - 64px)',
-        float: 'left',
-        overflowY: 'scroll',
-        overflowX: 'hidden',
-        display: 'block',
-        width: '60vw',
-      },
-      right: {
-        height: 'calc(100vh - 64px)',
-        color: theme.palette.text.primary,
-        float: 'left',
-        width: '40vw',
-        overflowY: 'scroll',
-        overflowX: 'hidden',
-        display: 'block',
-      },
-      centerContent: {
-        width: '100vw',
-        overflow: 'hidden',
-      },
-      content: {
-        backgroundColor: theme.palette.background.default,
-        transition: theme.transitions.create('margin', {
-          easing: theme.transitions.easing.sharp,
-          duration: theme.transitions.duration.leavingScreen,
-        }),
-        marginLeft: 0,
-      },
-      contentShift: {
-        padding: 0,
-        backgroundColor: theme.palette.background.default,
-        transition: theme.transitions.create('margin', {
-          easing: theme.transitions.easing.easeOut,
-          duration: theme.transitions.duration.enteringScreen,
-        }),
-        marginLeft: drawerWidth,
-      },
-    }
-  }
-
-  public render() {
-    const { settingsVisible } = this.props
-    const { content, contentShift, centerContent } = this.getStyles()
-    return <div style={centerContent}>
-      <CssBaseline />
-      <Settings />
-      <div style={settingsVisible ? contentShift : content}>
-          <TitleBar />
-          <div style={centerContent}>
-            <div style={this.getStyles().left}>
-              <Tree connectionId={this.state.connectionId} didSelectNode={(node: q.TreeNode) => {
-                this.setState({ selectedNode: node })
-              }} />
-            </div>
-            <div style={this.getStyles().right}>
-              <Sidebar connectionId={this.state.connectionId} />
-            </div>
-          </div>
-      </div>
-      <Connection onConnection={(connectionId: string) => this.setState({ connectionId })}/>
-    </div >
-  }
-}
-
-const mapStateToProps = (state: AppState) => {
-  return {
-    settingsVisible: state.settings.visible,
-  }
-}
-
-export default withStyles({}, { withTheme: true })(connect(mapStateToProps)(App))

app/src/actions/Charts.ts

@@ -0,0 +1,128 @@
+import { Action, ActionTypes, ChartParameters } from '../reducers/Charts'
+import { AppState } from '../reducers'
+import { default as persistentStorage, StorageIdentifier } from '../utils/PersistentStorage'
+import { Dispatch } from 'redux'
+import { showError, showNotification } from './Global'
+
+interface ConnectionViewState {
+  charts: Array<ChartParameters>
+}
+
+interface ConnectionViewStateDictionary {
+  [s: string]: ConnectionViewState
+}
+const connectionViewStateIdentifier: StorageIdentifier<ConnectionViewStateDictionary> = {
+  id: 'connection_view_state',
+}
+
+export const loadCharts = () => async (dispatch: Dispatch<any>, getState: () => AppState) => {
+  const connectionId = getState().connection.connectionId
+  if (!connectionId) {
+    return
+  }
+
+  let viewStates: ConnectionViewStateDictionary | undefined
+  try {
+    viewStates = await persistentStorage.load(connectionViewStateIdentifier)
+  } catch (error) {
+    dispatch(showError(error))
+  }
+
+  if (!viewStates || !viewStates[connectionId]) {
+    dispatch(setCharts([]))
+    return
+  }
+
+  const viewState = viewStates[connectionId]
+  if (viewState) {
+    dispatch(setCharts(viewState.charts))
+  }
+}
+
+export const saveCharts = () => async (dispatch: Dispatch<any>, getState: () => AppState) => {
+  const connectionId = getState().connection.connectionId
+  if (!connectionId) {
+    return
+  }
+
+  const charts = getState()
+    .charts.get('charts')
+    .toArray()
+
+  let viewStates: ConnectionViewStateDictionary | undefined
+  try {
+    viewStates = (await persistentStorage.load(connectionViewStateIdentifier)) || {}
+    const state: ConnectionViewState = viewStates[connectionId] || { charts: [] }
+    state.charts = charts
+
+    viewStates[connectionId] = state
+    await persistentStorage.store(connectionViewStateIdentifier, viewStates)
+  } catch (error) {
+    dispatch(showError(error))
+  }
+}
+
+export const addChart = (chartParameters: ChartParameters) => async (
+  dispatch: Dispatch<any>,
+  getState: () => AppState
+) => {
+  const chartExists = Boolean(
+    getState()
+      .charts.get('charts')
+      .find(chart => chart.topic === chartParameters.topic && chart.dotPath === chartParameters.dotPath)
+  )
+  if (chartExists) {
+    dispatch(showNotification('Already added'))
+    return
+  }
+
+  dispatch({
+    type: ActionTypes.CHARTS_ADD,
+    chart: chartParameters,
+  })
+  dispatch(saveCharts())
+  dispatch(showNotification('Added to chart panel'))
+}
+
+export const updateChart = (chartParameters: ChartParameters) => async (
+  dispatch: Dispatch<any>,
+  getState: () => AppState
+) => {
+  dispatch({
+    type: ActionTypes.CHARTS_UPDATE,
+    topic: chartParameters.topic,
+    dotPath: chartParameters.dotPath,
+    parameters: chartParameters,
+  })
+  dispatch(saveCharts())
+}
+
+export const removeChart = (chartParameters: ChartParameters) => async (
+  dispatch: Dispatch<any>,
+  getState: () => AppState
+) => {
+  dispatch({
+    chart: chartParameters,
+    type: ActionTypes.CHARTS_REMOVE,
+  })
+  dispatch(saveCharts())
+}
+
+export const moveChartUp = (parameters: { topic: string; dotPath?: string }) => async (
+  dispatch: Dispatch<any>,
+  getState: () => AppState
+) => {
+  dispatch({
+    topic: parameters.topic,
+    dotPath: parameters.dotPath,
+    type: ActionTypes.CHARTS_MOVE_UP,
+  })
+  dispatch(saveCharts())
+}
+
+export const setCharts = (charts: Array<ChartParameters>): Action => {
+  return {
+    charts,
+    type: ActionTypes.CHARTS_SET,
+  }
+}

app/src/actions/Connection.ts

@@ -0,0 +1,94 @@
+import * as q from '../../../backend/src/Model'
+import * as url from 'url'
+import { Action, ActionTypes } from '../reducers/Connection'
+import { ActionTypes as SettingsActionTypes } from '../reducers/Settings'
+import { AppState } from '../reducers'
+import { DataSourceState, MqttOptions } from '../../../backend/src/DataSource'
+import { Dispatch } from 'redux'
+import { globalActions } from '.'
+import { resetStore as resetTreeStore, showTree } from './Tree'
+import { showError } from './Global'
+import { TopicViewModel } from '../model/TopicViewModel'
+import { addMqttConnectionEvent, makeConnectionStateEvent, removeConnection, rendererEvents } from '../../../events'
+
+export const connect = (options: MqttOptions, connectionId: string) => (
+  dispatch: Dispatch<any>,
+  getState: () => AppState
+) => {
+  dispatch(connecting(connectionId))
+  rendererEvents.emit(addMqttConnectionEvent, { options, id: connectionId })
+  const event = makeConnectionStateEvent(connectionId)
+  const host = url.parse(options.url).hostname
+
+  rendererEvents.subscribe(event, dataSourceState => {
+    if (dataSourceState.connected) {
+      const didReconnect = Boolean(getState().connection.tree)
+      if (!didReconnect) {
+        const tree = new q.Tree<TopicViewModel>()
+        tree.updateWithConnection(rendererEvents, connectionId)
+        dispatch(showTree(tree))
+        dispatch(connected(tree, host!))
+      }
+    } else if (dataSourceState.error) {
+      dispatch(showError(dataSourceState.error))
+      dispatch(disconnect())
+    }
+    dispatch(updateHealth(dataSourceState))
+  })
+}
+
+const updateHealth = (dataSourceState: DataSourceState) => (dispatch: Dispatch<any>, getState: () => AppState) => {
+  let state
+  if (dataSourceState.connecting) {
+    state = 'connecting'
+  } else if (!dataSourceState.connected) {
+    state = 'offline'
+    dispatch(globalActions.showError('Disconnected from server'))
+  } else if (dataSourceState.connected) {
+    state = 'online'
+  } else {
+    state = undefined
+  }
+
+  dispatch({
+    type: ActionTypes.CONNECTION_SET_HEALTH,
+    health: state,
+  })
+}
+
+export const connected: (tree: q.Tree<TopicViewModel>, host: string) => Action = (
+  tree: q.Tree<TopicViewModel>,
+  host: string
+) => ({
+  tree,
+  host,
+  type: ActionTypes.CONNECTION_SET_CONNECTED,
+})
+
+export const connecting: (connectionId: string) => Action = (connectionId: string) => ({
+  connectionId,
+  type: ActionTypes.CONNECTION_SET_CONNECTING,
+})
+
+export const disconnect = () => (dispatch: Dispatch<any>, getState: () => AppState) => {
+  const { connectionId, tree } = getState().connection
+  if (connectionId) {
+    rendererEvents.emit(removeConnection, connectionId)
+    rendererEvents.unsubscribeAll(makeConnectionStateEvent(connectionId))
+  }
+
+  tree && tree.stopUpdating()
+  tree && tree.destroy()
+
+  // Clear topic filter
+  dispatch({
+    topicFilter: '',
+    type: SettingsActionTypes.SETTINGS_FILTER_TOPICS,
+  })
+
+  dispatch(resetTreeStore())
+  dispatch({
+    type: ActionTypes.CONNECTION_SET_DISCONNECTED,
+  })
+  dispatch(showTree(undefined))
+}

app/src/actions/ConnectionManager.ts

@@ -0,0 +1,214 @@
+import { AppState } from '../reducers'
+import { clearLegacyConnectionOptions, loadLegacyConnectionOptions } from '../model/LegacyConnectionSettings'
+import {
+  ConnectionOptions,
+  createEmptyConnection,
+  makeDefaultConnections,
+  CertificateParameters,
+} from '../model/ConnectionOptions'
+import { default as persistentStorage, StorageIdentifier } from '../utils/PersistentStorage'
+import { Dispatch } from 'redux'
+import { showError } from './Global'
+import { remote } from 'electron'
+import * as fs from 'fs'
+import * as path from 'path'
+
+import { ActionTypes, Action } from '../reducers/ConnectionManager'
+
+interface ConnectionDictionary {
+  [s: string]: ConnectionOptions
+}
+const storedConnectionsIdentifier: StorageIdentifier<ConnectionDictionary> = {
+  id: 'ConnectionManager_connections',
+}
+
+export const loadConnectionSettings = () => async (dispatch: Dispatch<any>, getState: () => AppState) => {
+  let connections
+  try {
+    await ensureConnectionsHaveBeenInitialized()
+    connections = await persistentStorage.load(storedConnectionsIdentifier)
+  } catch (error) {
+    dispatch(showError(error))
+  }
+
+  if (!connections) {
+    return
+  }
+
+  dispatch(setConnections(connections))
+  const firstKey = Object.keys(connections)[0]
+  if (firstKey) {
+    dispatch(selectConnection(firstKey))
+  }
+}
+
+export type CertificateTypes = 'selfSignedCertificate' | 'clientCertificate' | 'clientKey'
+export const selectCertificate = (type: CertificateTypes, connectionId: string) => async (
+  dispatch: Dispatch<any>,
+  getState: () => AppState
+) => {
+  try {
+    const certificate = await openCertificate()
+    dispatch(
+      updateConnection(connectionId, {
+        [type]: certificate,
+      })
+    )
+  } catch (error) {
+    dispatch(showError(error))
+  }
+}
+
+async function openCertificate(): Promise<CertificateParameters> {
+  const rejectReasons = {
+    noCertificateSelected: 'No certificate selected',
+    certificateSizeDoesNotMatch: 'Certificate size larger/smaller then expected.',
+  }
+
+  return new Promise((resolve, reject) => {
+    remote.dialog.showOpenDialog(
+      { properties: ['openFile'], securityScopedBookmarks: true },
+      (filePaths?: Array<string>) => {
+        const selectedFile = filePaths && filePaths[0]
+        if (!selectedFile) {
+          reject(rejectReasons.noCertificateSelected)
+          return
+        }
+
+        fs.readFile(selectedFile, (error, data) => {
+          if (error) {
+            reject(error)
+            return
+          }
+
+          if (data.length > 16_384 || data.length < 128) {
+            reject(rejectReasons.certificateSizeDoesNotMatch)
+            return
+          }
+
+          resolve({
+            data: data.toString('base64'),
+            name: path.basename(selectedFile),
+          })
+        })
+      }
+    )
+  })
+}
+
+export const saveConnectionSettings = () => async (dispatch: Dispatch<any>, getState: () => AppState) => {
+  try {
+    console.log('store settings')
+    await persistentStorage.store(storedConnectionsIdentifier, getState().connectionManager.connections)
+  } catch (error) {
+    dispatch(showError(error))
+  }
+}
+
+export const updateConnection = (connectionId: string, changeSet: Partial<ConnectionOptions>): Action => ({
+  connectionId,
+  changeSet,
+  type: ActionTypes.CONNECTION_MANAGER_UPDATE_CONNECTION,
+})
+
+export const addSubscription = (subscription: string, connectionId: string): Action => ({
+  connectionId,
+  subscription,
+  type: ActionTypes.CONNECTION_MANAGER_ADD_SUBSCRIPTION,
+})
+
+export const deleteSubscription = (subscription: string, connectionId: string): Action => ({
+  connectionId,
+  subscription,
+  type: ActionTypes.CONNECTION_MANAGER_DELETE_SUBSCRIPTION,
+})
+
+export const createConnection = () => (dispatch: Dispatch<any>) => {
+  const newConnection = createEmptyConnection()
+  dispatch(addConnection(newConnection))
+  dispatch(selectConnection(newConnection.id))
+}
+
+export const setConnections = (connections: { [s: string]: ConnectionOptions }): Action => ({
+  connections,
+  type: ActionTypes.CONNECTION_MANAGER_SET_CONNECTIONS,
+})
+
+export const selectConnection = (connectionId: string): Action => ({
+  selected: connectionId,
+  type: ActionTypes.CONNECTION_MANAGER_SELECT_CONNECTION,
+})
+
+export const addConnection = (connection: ConnectionOptions): Action => ({
+  connection,
+  type: ActionTypes.CONNECTION_MANAGER_ADD_CONNECTION,
+})
+
+export const toggleAdvancedSettings = (): Action => ({
+  type: ActionTypes.CONNECTION_MANAGER_TOGGLE_ADVANCED_SETTINGS,
+})
+
+export const toggleCertificateSettings = (): Action => ({
+  type: ActionTypes.CONNECTION_MANAGER_TOGGLE_CERTIFICATE_SETTINGS,
+})
+
+export const deleteConnection = (connectionId: string) => (dispatch: Dispatch<any>, getState: () => AppState) => {
+  const connectionIds = Object.keys(getState().connectionManager.connections)
+  const connectionIdLocation = connectionIds.indexOf(connectionId)
+
+  const remainingIds = connectionIds.filter(id => id !== connectionId)
+  const nextSelectedConnectionIndex = Math.min(remainingIds.length - 1, connectionIdLocation)
+  const nextSelectedConnection = remainingIds[nextSelectedConnectionIndex]
+
+  dispatch({
+    connectionId,
+    type: ActionTypes.CONNECTION_MANAGER_DELETE_CONNECTION,
+  })
+
+  if (nextSelectedConnection) {
+    dispatch(selectConnection(nextSelectedConnection))
+  }
+}
+
+async function ensureConnectionsHaveBeenInitialized() {
+  let connections = await persistentStorage.load(storedConnectionsIdentifier)
+  const requiresInitialization = !connections
+  if (requiresInitialization) {
+    const migratedConnection = loadLegacyConnectionOptions()
+    const defaultConnections = makeDefaultConnections()
+    connections = {
+      ...migratedConnection,
+      ...defaultConnections,
+    }
+    await persistentStorage.store(storedConnectionsIdentifier, connections)
+
+    clearLegacyConnectionOptions()
+  }
+
+  // Migrate connections, rewrite dictionary to "keep" it "ordered" (dictionaries do not have a guaranteed order)
+  const mayNeedMigrations = connections && connections['iot.eclipse.org']
+  if (connections && mayNeedMigrations) {
+    let newConnections = {}
+    for (const connection of Object.values(connections)) {
+      addMigratedConnection(newConnections, connection)
+    }
+
+    await persistentStorage.store(storedConnectionsIdentifier, newConnections)
+  }
+}
+
+function addMigratedConnection(newConnections: { [key: string]: ConnectionOptions }, connection: ConnectionOptions) {
+  // The host has been renamed, only change the host if it has not been changed
+  // Also check for ssl since SSL is not yet working
+  if (
+    connection.id === 'iot.eclipse.org' &&
+    connection.host === 'iot.eclipse.org' &&
+    connection.port === 1883 &&
+    !connection.encryption
+  ) {
+    connection.id = 'mqtt.eclipse.org'
+    connection.host = 'mqtt.eclipse.org'
+    connection.name = 'mqtt.eclipse.org'
+  }
+  newConnections[connection.id] = connection
+}

app/src/actions/Global.ts

@@ -0,0 +1,22 @@
+import { ActionTypes } from '../reducers/Global'
+import { Dispatch } from 'redux'
+
+export const showError = (error?: string) => ({
+  error,
+  type: ActionTypes.showError,
+})
+
+export const showNotification = (notification?: string) => ({
+  notification,
+  type: ActionTypes.showNotification,
+})
+
+export const didLaunch = () => ({
+  type: ActionTypes.didLaunch,
+})
+
+export const toggleSettingsVisibility = () => (dispatch: Dispatch<any>) => {
+  dispatch({
+    type: ActionTypes.toggleSettingsVisibility,
+  })
+}

app/src/actions/Publish.ts

@@ -0,0 +1,57 @@
+import { Action, ActionTypes } from '../reducers/Publish'
+import { AppState } from '../reducers'
+import { Base64Message } from '../../../backend/src/Model/Base64Message'
+import { Dispatch } from 'redux'
+import { makePublishEvent, rendererEvents } from '../../../events'
+
+export const setTopic = (topic?: string): Action => {
+  return {
+    topic,
+    type: ActionTypes.PUBLISH_SET_TOPIC,
+  }
+}
+
+export const setPayload = (payload?: string): Action => {
+  return {
+    payload,
+    type: ActionTypes.PUBLISH_SET_PAYLOAD,
+  }
+}
+
+export const setQoS = (qos: 0 | 1 | 2): Action => {
+  return {
+    qos,
+    type: ActionTypes.PUBLISH_SET_QOS,
+  }
+}
+
+export const setEditorMode = (editorMode: string): Action => {
+  return {
+    editorMode,
+    type: ActionTypes.PUBLISH_SET_EDITOR_MODE,
+  }
+}
+
+export const publish = (connectionId: string) => (dispatch: Dispatch<Action>, getState: () => AppState) => {
+  const state = getState()
+  const topic = state.publish.topic
+
+  if (!topic) {
+    return
+  }
+
+  const publishEvent = makePublishEvent(connectionId)
+  const mqttMessage = {
+    topic,
+    payload: state.publish.payload ? Base64Message.fromString(state.publish.payload) : null,
+    retain: state.publish.retain,
+    qos: state.publish.qos,
+  }
+  rendererEvents.emit(publishEvent, mqttMessage)
+}
+
+export const toggleRetain = (): Action => {
+  return {
+    type: ActionTypes.PUBLISH_TOGGLE_RETAIN,
+  }
+}

app/src/actions/Settings.ts

@@ -1,21 +1,172 @@
-import { ActionTypes, NodeOrder, CustomAction } from '../reducers'
+import * as q from '../../../backend/src/Model'
+import { ActionTypes, SettingsStateModel, TopicOrder } from '../reducers/Settings'
+import { AppState } from '../reducers'
+import { autoExpandLimitSet } from '../components/SettingsDrawer/Settings'
+import { Base64Message } from '../../../backend/src/Model/Base64Message'
+import { batchActions } from 'redux-batched-actions'
+import { default as persistentStorage, StorageIdentifier } from '../utils/PersistentStorage'
+import { Dispatch } from 'redux'
+import { globalActions } from './'
+import { showError } from './Global'
+import { showTree } from './Tree'
+import { TopicViewModel } from '../model/TopicViewModel'
 
-export const setAutoExpandLimit = (autoExpandLimit: number = 0): CustomAction => {
-  return {
+const settingsIdentifier: StorageIdentifier<Partial<SettingsStateModel>> = {
+  id: 'Settings',
+}
+
+export const loadSettings = () => async (dispatch: Dispatch<any>, getState: () => AppState) => {
+  try {
+    const settings = (await persistentStorage.load(settingsIdentifier)) || {}
+    dispatch({
+      settings: getState().settings.merge(settings),
+      type: ActionTypes.SETTINGS_DID_LOAD_SETTINGS,
+    })
+  } catch (error) {
+    dispatch(showError(error))
+  }
+  dispatch(globalActions.didLaunch())
+}
+
+export const storeSettings = () => async (dispatch: Dispatch<any>, getState: () => AppState) => {
+  const settings = {
+    ...getState().settings.toJS(),
+    autoExpandLimit: undefined,
+    topicFilter: undefined,
+    visible: undefined,
+  }
+
+  try {
+    await persistentStorage.store(settingsIdentifier, settings)
+  } catch (error) {
+    dispatch(showError(error))
+  }
+}
+
+export const setAutoExpandLimit = (autoExpandLimit: number = 0) => (dispatch: Dispatch<any>) => {
+  dispatch({
     autoExpandLimit,
-    type: ActionTypes.setAutoExpandLimit,
-  }
+    type: ActionTypes.SETTINGS_SET_AUTO_EXPAND_LIMIT,
+  })
 }
 
-export const toggleSettingsVisibility = (): CustomAction => {
-  return {
-    type: ActionTypes.toggleSettingsVisibility,
-  }
+export const setTimeLocale = (timeLocale: string) => (dispatch: Dispatch<any>) => {
+  dispatch({
+    timeLocale,
+    type: ActionTypes.SETTINGS_SET_TIME_LOCALE,
+  })
+  dispatch(storeSettings())
 }
 
-export const setNodeOrder = (nodeOrder: NodeOrder = NodeOrder.none): CustomAction => {
-  return {
-    nodeOrder,
-    type: ActionTypes.setNodeOrder,
+export const selectTopicWithMouseOver = (doSelect: boolean) => (dispatch: Dispatch<any>) => {
+  dispatch({
+    selectTopicWithMouseOver: doSelect,
+    type: ActionTypes.SETTINGS_SET_SELECT_TOPIC_WITH_MOUSE_OVER,
+  })
+  dispatch(storeSettings())
+}
+
+export const setValueDisplayMode = (valueRendererDisplayMode: 'diff' | 'raw') => (dispatch: Dispatch<any>) => {
+  dispatch({
+    valueRendererDisplayMode,
+    type: ActionTypes.SETTINGS_SET_VALUE_RENDERER_DISPLAY_MODE,
+  })
+  dispatch(storeSettings())
+}
+
+export const toggleHighlightTopicUpdates = () => (dispatch: Dispatch<any>) => {
+  dispatch({
+    type: ActionTypes.SETTINGS_TOGGLE_HIGHLIGHT_ACTIVITY,
+  })
+  dispatch(storeSettings())
+}
+
+export const setTopicOrder = (topicOrder: TopicOrder = TopicOrder.none) => (dispatch: Dispatch<any>) => {
+  dispatch({
+    topicOrder,
+    type: ActionTypes.SETTINGS_SET_TOPIC_ORDER,
+  })
+  dispatch(storeSettings())
+}
+
+export const filterTopics = (filterStr: string) => (dispatch: Dispatch<any>, getState: () => AppState) => {
+  const { tree } = getState().connection
+
+  dispatch({
+    topicFilter: filterStr,
+    type: ActionTypes.SETTINGS_FILTER_TOPICS,
+  })
+
+  if (!filterStr || !tree) {
+    dispatch(batchActions([setAutoExpandLimit(0), showTree(tree) as any]))
+    return
   }
+
+  const topicFilter = filterStr.toLowerCase()
+
+  const nodeFilter = (node: q.TreeNode<TopicViewModel>): boolean => {
+    const topicMatches =
+      node
+        .path()
+        .toLowerCase()
+        .indexOf(topicFilter) !== -1
+    if (topicMatches) {
+      return true
+    }
+
+    const messageMatches =
+      node.message &&
+      node.message.value &&
+      Base64Message.toUnicodeString(node.message.value)
+        .toLowerCase()
+        .indexOf(filterStr) !== -1
+
+    return Boolean(messageMatches)
+  }
+
+  const resultTree = tree
+    .childTopics()
+    .filter(nodeFilter)
+    .map((node: q.TreeNode<TopicViewModel>) => {
+      const clone = node.unconnectedClone()
+      q.TreeNodeFactory.insertNodeAtPosition(node.path().split('/'), clone)
+      return clone.firstNode()
+    })
+    .reduce((a: q.TreeNode<TopicViewModel>, b: q.TreeNode<TopicViewModel>) => {
+      a.updateWithNode(b)
+      return a
+    }, new q.Tree<TopicViewModel>())
+
+  const nextTree: q.Tree<TopicViewModel> = resultTree as q.Tree<TopicViewModel>
+  if (tree.updateSource && tree.connectionId) {
+    nextTree.updateWithConnection(tree.updateSource, tree.connectionId, nodeFilter)
+  }
+
+  dispatch(batchActions([setAutoExpandLimit(autoExpandLimitForTree(nextTree)), showTree(nextTree) as any]))
+}
+
+function autoExpandLimitForTree(tree: q.Tree<TopicViewModel>) {
+  if (!tree) {
+    return 0
+  }
+
+  function closestExistingLimit(i: number): number {
+    const sorted = [...autoExpandLimitSet].sort((a, b) => Math.abs(a.limit - i) - Math.abs(b.limit - i))
+    return sorted[0].limit
+  }
+
+  const count = tree.childTopicCount()
+  const calculatedLimit = Math.max(7 - Math.log(count), 0) * 2
+
+  return closestExistingLimit(calculatedLimit)
+}
+
+export const toggleTheme = () => (dispatch: Dispatch<any>, getState: () => AppState) => {
+  dispatch({
+    type:
+      getState().settings.get('theme') === 'light'
+        ? ActionTypes.SETTINGS_SET_THEME_DARK
+        : ActionTypes.SETTINGS_SET_THEME_LIGHT,
+  })
+  dispatch(storeSettings())
 }

app/src/actions/Sidebar.ts

@@ -1,15 +1,23 @@
-import { ActionTypes, CustomAction } from '../reducers'
+import * as q from '../../../backend/src/Model'
+import { ActionTypes } from '../reducers/Sidebar'
+import { AppState } from '../reducers'
+import { Dispatch } from 'redux'
+import { clearTopic } from './clearTopic'
 
-export const setPublishTopic = (topic: string): CustomAction  => {
-  return {
-    publishTopic: topic,
-    type: ActionTypes.setPublishTopic,
+export { clearTopic } from './clearTopic'
+
+export const clearRetainedTopic = () => (dispatch: Dispatch<any>, getState: () => AppState) => {
+  const selectedTopic = getState().tree.get('selectedTopic')
+  if (!selectedTopic) {
+    return
   }
+
+  dispatch(clearTopic(selectedTopic, false))
 }
 
-export const setPublishPayload = (payload: string): CustomAction => {
-  return {
-    publishPayload: payload,
-    type: ActionTypes.setPublishPayload,
-  }
+export const setCompareMessage = (message?: q.Message) => (dispatch: Dispatch<any>) => {
+  dispatch({
+    message,
+    type: ActionTypes.SIDEBAR_SET_COMPARE_MESSAGE,
+  })
 }

app/src/actions/Tree.ts

@@ -1,9 +1,117 @@
-import { ActionTypes, CustomAction } from '../reducers'
 import * as q from '../../../backend/src/Model'
+import { ActionTypes } from '../reducers/Tree'
+import { ActionTypes as SidebarActionTypes } from '../reducers/Sidebar'
+import { AnyAction, Dispatch } from 'redux'
+import { AppState } from '../reducers'
+import { batchActions } from 'redux-batched-actions'
+import { globalActions } from './'
+import { setTopic } from './Publish'
+import { TopicViewModel } from '../model/TopicViewModel'
+const debounce = require('lodash.debounce')
+export { clearTopic } from './clearTopic'
 
-export const selectTopic = (topic: q.TreeNode): CustomAction => {
-  return {
-    selectedTopic: topic,
-    type: ActionTypes.selectTopic,
+export { moveSelectionUpOrDownwards, moveInward, moveOutward } from './visibleTreeTraversal'
+
+export const selectTopic = (topic: q.TreeNode<TopicViewModel>) => (
+  dispatch: Dispatch<any>,
+  getState: () => AppState
+) => {
+  debouncedSelectTopic(topic, dispatch, getState)
+}
+
+const debouncedSelectTopic = debounce(
+  (topic: q.TreeNode<TopicViewModel>, dispatch: Dispatch<any>, getState: () => AppState) => {
+    const previouslySelectedTopic = getState().tree.get('selectedTopic')
+
+    if (previouslySelectedTopic === topic) {
+      return
+    }
+
+    // Update publish topic
+    let setTopicDispatch: any | undefined
+    if (!getState().publish.topic) {
+      setTopicDispatch = setTopic(topic.path())
+    } else if (previouslySelectedTopic && previouslySelectedTopic.path() === getState().publish.topic) {
+      setTopicDispatch = setTopic(topic.path())
+    }
+
+    if (previouslySelectedTopic && previouslySelectedTopic.viewModel) {
+      previouslySelectedTopic.viewModel.setSelected(false)
+    }
+
+    if (topic.viewModel) {
+      topic.viewModel.setSelected(true)
+    }
+
+    const selectTreeTopicDispatch = {
+      selectedTopic: topic,
+      type: ActionTypes.TREE_SELECT_TOPIC,
+    }
+
+    dispatch({
+      type: SidebarActionTypes.SIDEBAR_SET_COMPARE_MESSAGE,
+      message: undefined,
+    })
+
+    if (setTopicDispatch) {
+      dispatch(batchActions([selectTreeTopicDispatch, setTopicDispatch]))
+    } else {
+      dispatch(selectTreeTopicDispatch)
+    }
+  },
+  70
+)
+
+function destroyUnreferencedTree(state: AppState) {
+  const visibleTree = state.tree.get('tree')
+  const connectionTree = state.connection.tree
+
+  // Stop updates of old tree
+  if (visibleTree && visibleTree !== connectionTree) {
+    console.warn('destroy')
+    visibleTree.stopUpdating()
+    visibleTree.destroy()
   }
 }
+
+export const resetStore = () => (dispatch: Dispatch<any>, getState: () => AppState): AnyAction => {
+  destroyUnreferencedTree(getState())
+
+  return dispatch({
+    type: ActionTypes.TREE_RESET_STORE,
+  })
+}
+
+export const showTree = (tree: q.Tree<TopicViewModel> | undefined) => (
+  dispatch: Dispatch<any>,
+  getState: () => AppState
+): AnyAction => {
+  destroyUnreferencedTree(getState())
+
+  return dispatch({
+    tree,
+    type: ActionTypes.TREE_SHOW_TREE,
+  })
+}
+
+export const togglePause = (tree?: q.Tree<TopicViewModel>) => (dispatch: Dispatch<any>, getState: () => AppState) => {
+  const paused = getState().tree.get('paused')
+  const tree = getState().tree.get('tree')
+  const changes = tree ? tree.unmergedChanges().length : 0
+
+  if (paused && changes > 0) {
+    dispatch(globalActions.showNotification('Applying recorded changes.'))
+  }
+
+  // Allow for notification to be displayed
+  setTimeout(() => {
+    tree && tree.applyUnmergedChanges()
+    if (paused && changes > 0) {
+      dispatch(globalActions.showNotification(`Successfully applied ${changes} changes.`))
+    }
+  }, 50)
+
+  dispatch({
+    type: paused ? ActionTypes.TREE_RESUME_UPDATES : ActionTypes.TREE_PAUSE_UPDATES,
+  })
+}

app/src/actions/UpdateNotifier.ts

@@ -0,0 +1,15 @@
+import { ActionTypes, GlobalAction } from '../reducers/Global'
+
+export const showUpdateNotification = (show: boolean): GlobalAction => {
+  return {
+    type: ActionTypes.showUpdateNotification,
+    showUpdateNotification: show,
+  }
+}
+
+export const showUpdateDetails = (show: boolean): GlobalAction => {
+  return {
+    type: ActionTypes.showUpdateDetails,
+    showUpdateDetails: show,
+  }
+}

app/src/actions/clearTopic.ts

@@ -0,0 +1,41 @@
+import * as q from '../../../backend/src/Model'
+import { AppState } from '../reducers'
+import { Dispatch } from 'redux'
+import { makePublishEvent, rendererEvents } from '../../../events'
+import { moveSelectionUpOrDownwards } from './visibleTreeTraversal'
+
+export const clearTopic = (topic: q.TreeNode<any>, recursive: boolean, subtopicClearLimit = 50) => (
+  dispatch: Dispatch<any>,
+  getState: () => AppState
+) => {
+  dispatch(moveSelectionUpOrDownwards('next'))
+
+  const { connectionId } = getState().connection
+  if (!connectionId) {
+    return
+  }
+  const publishEvent = makePublishEvent(connectionId)
+  const mqttMessage = {
+    topic: topic.path(),
+    payload: null,
+    retain: true,
+    qos: 0 as 0,
+  }
+  rendererEvents.emit(publishEvent, mqttMessage)
+  if (recursive) {
+    topic
+      .childTopics()
+      .filter(topic => Boolean(topic.message && topic.message.value))
+      .slice(0, subtopicClearLimit)
+      .forEach((topic, idx) => {
+        const mqttMessage = {
+          topic: topic.path(),
+          payload: null,
+          retain: true,
+          qos: 0 as 0,
+        }
+        // Rate limit deletion
+        setTimeout(() => rendererEvents.emit(publishEvent, mqttMessage), 20 * idx)
+      })
+  }
+}

app/src/actions/index.ts

@@ -1,5 +1,21 @@
+import * as chartActions from './Charts'
+import * as connectionActions from './Connection'
+import * as connectionManagerActions from './ConnectionManager'
+import * as globalActions from './Global'
+import * as publishActions from './Publish'
 import * as settingsActions from './Settings'
-import * as treeActions from './Tree'
 import * as sidebarActions from './Sidebar'
+import * as treeActions from './Tree'
+import * as updateNotifierActions from './UpdateNotifier'
 
-export { settingsActions, treeActions, sidebarActions }
+export {
+  settingsActions,
+  treeActions,
+  chartActions,
+  publishActions,
+  updateNotifierActions,
+  connectionActions,
+  sidebarActions,
+  connectionManagerActions,
+  globalActions,
+}

app/src/actions/visibleTreeTraversal.ts

@@ -0,0 +1,135 @@
+import * as q from '../../../backend/src/Model'
+import { AppState } from '../reducers'
+import { Dispatch } from 'redux'
+import { selectTopic } from './Tree'
+import { SettingsState } from '../reducers/Settings'
+import { sortedNodes } from '../sortedNodes'
+import { TopicViewModel } from '../model/TopicViewModel'
+
+export const moveSelectionUpOrDownwards = (direction: 'next' | 'previous') => (
+  dispatch: Dispatch<any>,
+  getState: () => AppState
+): any => {
+  const state = getState()
+  const selected = state.tree.get('selectedTopic')
+  const tree = state.tree.get('tree')
+
+  if (!selected || !tree) {
+    if (tree) {
+      dispatch(selectTopic(tree))
+    }
+    return
+  }
+  const nextTreeNode = nextVisibleElementInTree(state.settings, tree, selected, direction)
+  if (nextTreeNode && nextTreeNode.viewModel) {
+    dispatch(selectTopic(nextTreeNode))
+  }
+}
+
+export const moveInward = () => (dispatch: Dispatch<any>, getState: () => AppState): any => {
+  const state = getState()
+  const selected = state.tree.get('selectedTopic')
+  if (!selected || !selected.viewModel) {
+    return
+  }
+
+  if (!selected.viewModel.isExpanded() && selected.edgeCount() > 0) {
+    selected.viewModel.setExpanded(true, true)
+  } else {
+    dispatch(moveSelectionUpOrDownwards('next'))
+  }
+}
+
+export const moveOutward = () => (dispatch: Dispatch<any>, getState: () => AppState): any => {
+  const state = getState()
+  const selected = state.tree.get('selectedTopic')
+  if (!selected || !selected.viewModel) {
+    return
+  }
+
+  if (selected.viewModel.isExpanded() && selected.edgeCount() > 0) {
+    selected.viewModel.setExpanded(false, true)
+  } else {
+    dispatch(moveSelectionUpOrDownwards('previous'))
+  }
+}
+
+function isTreeNodeVisible(treeNode: q.TreeNode<any>) {
+  return Boolean(treeNode.viewModel)
+}
+
+function nextVisibleElementInTree(
+  settings: SettingsState,
+  tree: q.Tree<TopicViewModel>,
+  node: q.TreeNode<TopicViewModel>,
+  direction: 'next' | 'previous'
+): q.TreeNode<TopicViewModel> | undefined {
+  if (direction === 'next') {
+    return findNextNodeDownward(settings, node)
+  } else {
+    return findNextNodeUpward(settings, node)
+  }
+}
+
+/** Not very efficient but easy to implement, complexity should not be an issue here  */
+function findNextNodeUpward(
+  settings: SettingsState,
+  treeNode: q.TreeNode<TopicViewModel>
+): q.TreeNode<TopicViewModel> | undefined {
+  const parent = treeNode.sourceEdge && treeNode.sourceEdge.source
+  if (!parent) {
+    return undefined
+  }
+
+  const neighborNodes = sortedNodes(settings, parent)
+  const nodeIdx = neighborNodes.findIndex(n => n.path() === treeNode.path())
+  if (nodeIdx === 0) {
+    return parent
+  }
+  const upwardNeighbor = neighborNodes[nodeIdx - 1]
+  if (upwardNeighbor) {
+    return lastVisibleChild(settings, upwardNeighbor)
+  } else {
+    return findNextNodeUpward(settings, parent)
+  }
+}
+
+function lastVisibleChild(settings: SettingsState, treeNode: q.TreeNode<TopicViewModel>): q.TreeNode<TopicViewModel> {
+  const nodes = sortedNodes(settings, treeNode).filter(isTreeNodeVisible)
+  if (nodes.length === 0) {
+    return treeNode
+  }
+  return lastVisibleChild(settings, nodes[nodes.length - 1])
+}
+
+function findNextNodeDownward(
+  settings: SettingsState,
+  treeNode: q.TreeNode<TopicViewModel>
+): q.TreeNode<TopicViewModel> | undefined {
+  const children = sortedNodes(settings, treeNode).filter(isTreeNodeVisible)
+  const firstChild = children[0]
+  if (firstChild) {
+    return firstChild
+  }
+
+  return findNextNodeDownwardNeighbor(settings, treeNode)
+}
+
+function findNextNodeDownwardNeighbor(
+  settings: SettingsState,
+  treeNode: q.TreeNode<TopicViewModel>
+): q.TreeNode<TopicViewModel> | undefined {
+  const parent = treeNode.sourceEdge && treeNode.sourceEdge.source
+  if (!parent) {
+    return undefined
+  }
+
+  const neighborNodes = sortedNodes(settings, parent).filter(isTreeNodeVisible)
+  const nodeIdx = neighborNodes.findIndex(n => n.path() === treeNode.path())
+  const downwardNeighbor = neighborNodes[nodeIdx + 1]
+  if (downwardNeighbor) {
+    return downwardNeighbor
+  } else {
+    return findNextNodeDownwardNeighbor(settings, parent)
+  }
+}

app/src/components/App.tsx

@@ -0,0 +1,160 @@
+import * as React from 'react'
+import ConnectionSetup from './ConnectionSetup/ConnectionSetup'
+import CssBaseline from '@material-ui/core/CssBaseline'
+import ErrorBoundary from './ErrorBoundary'
+import Notification from './Layout/Notification'
+import TitleBar from './Layout/TitleBar'
+import UpdateNotifier from './UpdateNotifier'
+import { AppState } from '../reducers'
+import { bindActionCreators } from 'redux'
+import { connect } from 'react-redux'
+import { globalActions, settingsActions } from '../actions'
+import { Theme, withStyles } from '@material-ui/core/styles'
+
+const Settings = React.lazy(() => import('./SettingsDrawer/Settings'))
+const ContentView = React.lazy(() => import('./Layout/ContentView'))
+
+interface Props {
+  connectionId: string
+  classes: any
+  settingsVisible: boolean
+  error?: string
+  notification?: string
+  actions: typeof globalActions
+  settingsActions: typeof settingsActions
+  launching: boolean
+}
+
+class App extends React.PureComponent<Props, {}> {
+  constructor(props: any) {
+    super(props)
+    this.state = {}
+  }
+
+  private renderNotification() {
+    const message = this.props.error || this.props.notification
+    const isError = message === this.props.error
+    if (message) {
+      // Guard in case someone ever calls showError with an error instead of a string
+      const str = typeof message === 'string' ? message : JSON.stringify(message)
+      return (
+        <Notification
+          message={str}
+          type={isError ? 'error' : 'notification'}
+          onClose={() => {
+            isError ? this.props.actions.showError(undefined) : this.props.actions.showNotification(undefined)
+          }}
+        />
+      )
+    }
+
+    return null
+  }
+
+  public componentDidMount() {
+    this.props.settingsActions.loadSettings()
+  }
+
+  public render() {
+    const { settingsVisible } = this.props
+    const { content, contentShift, centerContent, paneDefaults, heightProperty } = this.props.classes
+
+    if (this.props.launching) {
+      return null
+    }
+
+    return (
+      <div className={centerContent}>
+        <CssBaseline />
+        <ErrorBoundary>
+          {this.renderNotification()}
+          <React.Suspense fallback={<div></div>}>
+            <Settings />
+          </React.Suspense>
+          <div className={centerContent}>
+            <div className={`${settingsVisible ? contentShift : content}`}>
+              <TitleBar />
+            </div>
+            <div className={settingsVisible ? contentShift : content}>
+              <React.Suspense fallback={<div></div>}>
+                <ContentView
+                  heightProperty={heightProperty}
+                  connectionId={this.props.connectionId}
+                  paneDefaults={paneDefaults}
+                />
+              </React.Suspense>
+            </div>
+          </div>
+          <UpdateNotifier />
+          <ConnectionSetup />
+        </ErrorBoundary>
+      </div>
+    )
+  }
+}
+
+const styles = (theme: Theme) => {
+  const drawerWidth = 300
+  const contentBaseStyle = {
+    width: '100vw',
+    backgroundColor: theme.palette.background.default,
+  }
+
+  return {
+    heightProperty: {
+      height: '100%', // 'calc(100vh - 64px) !important',
+    },
+    paneDefaults: {
+      backgroundColor: theme.palette.background.default,
+      color: theme.palette.text.primary,
+      display: 'block' as 'block',
+      height: 'calc(100vh - 64px)',
+    },
+    centerContent: {
+      width: '100vw',
+      overflow: 'hidden' as 'hidden',
+    },
+    content: {
+      ...contentBaseStyle,
+      transition: theme.transitions.create('transform', {
+        easing: theme.transitions.easing.sharp,
+        duration: theme.transitions.duration.leavingScreen,
+      }),
+      transform: 'translateX(0px)',
+    },
+    contentShift: {
+      ...contentBaseStyle,
+      backgroundColor: theme.palette.background.default,
+      transition: theme.transitions.create('transform', {
+        easing: theme.transitions.easing.easeOut,
+        duration: theme.transitions.duration.enteringScreen,
+      }),
+      transform: `translateX(${drawerWidth}px)`,
+    },
+  }
+}
+
+const mapDispatchToProps = (dispatch: any) => {
+  return {
+    actions: bindActionCreators(globalActions, dispatch),
+    settingsActions: bindActionCreators(settingsActions, dispatch),
+  }
+}
+
+const mapStateToProps = (state: AppState) => {
+  return {
+    settingsVisible: state.globalState.get('settingsVisible'),
+    connectionId: state.connection.connectionId,
+    error: state.globalState.get('error'),
+    notification: state.globalState.get('notification'),
+    highlightTopicUpdates: state.settings.get('highlightTopicUpdates'),
+    launching: state.globalState.get('launching'),
+  }
+}
+
+export default withStyles(styles)(
+  connect(
+    mapStateToProps,
+    mapDispatchToProps
+  )(App)
+)

app/src/components/ChartPanel/Chart.tsx

@@ -0,0 +1,113 @@
+import * as q from '../../../../backend/src/Model'
+import React, { useState } from 'react'
+import TopicPlot from '../TopicPlot'
+import { bindActionCreators } from 'redux'
+import { chartActions } from '../../actions'
+import { ChartParameters } from '../../reducers/Charts'
+import { connect } from 'react-redux'
+import { Paper } from '@material-ui/core'
+import ChartTitle from './ChartTitle'
+import { ChartActions } from './ChartActions'
+const throttle = require('lodash.throttle')
+
+interface Props {
+  parameters: ChartParameters
+  treeNode?: q.TreeNode<any>
+  actions: {
+    chart: typeof chartActions
+  }
+}
+
+/**
+ * Subscribes to onMessages keeping track of additional data points
+ */
+function useMessageSubscriptionToUpdate(treeNode?: q.TreeNode<any>) {
+  const [lastUpdated, setLastUpdate] = useState(0)
+  const [messageHistory, setMessageHistory] = useState<q.MessageHistory | undefined>()
+  let amendMessageCallback: any
+
+  function subscribeToMessageUpdates() {
+    const throttledUpdate = throttle(() => setLastUpdate(treeNode ? treeNode.lastUpdate : 0), 300)
+
+    if (treeNode) {
+      const newMessageHistory = treeNode.messageHistory.clone()
+      newMessageHistory.setCapacity(500, 2 * 500 * 10000)
+
+      amendMessageCallback = (message: q.Message) => {
+        newMessageHistory.add(message)
+        throttledUpdate()
+      }
+      treeNode.onMessage.subscribe(amendMessageCallback)
+      setMessageHistory(newMessageHistory)
+    }
+
+    return function cleanup() {
+      treeNode && treeNode.onMessage.unsubscribe(amendMessageCallback)
+    }
+  }
+  React.useEffect(subscribeToMessageUpdates, [treeNode])
+
+  return messageHistory
+}
+
+function Chart(props: Props) {
+  const { parameters, treeNode } = props
+  const [frozenHistory, setFrozenHistory] = React.useState<q.MessageHistory | undefined>()
+  const messageHistory = useMessageSubscriptionToUpdate(treeNode)
+
+  const togglePause = React.useCallback(() => {
+    if (!props.treeNode) {
+      return
+    }
+    setFrozenHistory(frozenHistory ? undefined : messageHistory && messageHistory.clone())
+  }, [props.treeNode, frozenHistory])
+
+  const onRemove = React.useCallback(() => {
+    props.actions.chart.removeChart(props.parameters)
+  }, [props.parameters])
+
+  return (
+    <Paper
+      style={{ padding: '8px' }}
+      data-test-type="ChartPaper"
+      data-test={`${props.parameters.topic}-${props.parameters.dotPath || ''}`}
+    >
+      <div style={{ display: 'flex' }}>
+        <div style={{ display: 'flex', flexGrow: 1, overflow: 'hidden' }}>
+          <ChartTitle parameters={parameters} />
+          <ChartActions
+            parameters={parameters}
+            onRemove={onRemove}
+            paused={Boolean(frozenHistory)}
+            togglePause={togglePause}
+          />
+        </div>
+      </div>
+      {messageHistory ? (
+        <TopicPlot
+          color={props.parameters.color}
+          interpolation={props.parameters.interpolation}
+          timeInterval={props.parameters.timeRange ? props.parameters.timeRange.until : undefined}
+          range={props.parameters.range ? [props.parameters.range.from, props.parameters.range.to] : undefined}
+          history={frozenHistory || messageHistory}
+          dotPath={parameters.dotPath}
+        />
+      ) : (
+        <span>No data</span>
+      )}
+    </Paper>
+  )
+}
+
+const mapDispatchToProps = (dispatch: any) => {
+  return {
+    actions: {
+      chart: bindActionCreators(chartActions, dispatch),
+    },
+  }
+}
+
+export default connect(
+  undefined,
+  mapDispatchToProps
+)(Chart)

app/src/components/ChartPanel/ChartActions.tsx

@@ -0,0 +1,26 @@
+import * as React from 'react'
+import Play from '@material-ui/icons/PlayArrow'
+import Pause from '@material-ui/icons/PauseCircleFilled'
+import Clear from '@material-ui/icons/Clear'
+import CustomIconButton from '../helper/CustomIconButton'
+import { ChartParameters } from '../../reducers/Charts'
+import { SettingsButton } from './ChartSettings/SettingsButton'
+
+export function ChartActions(props: {
+  paused: boolean
+  togglePause: () => void
+  parameters: ChartParameters
+  onRemove: () => void
+}) {
+  return (
+    <div style={{ display: 'flex' }}>
+      <CustomIconButton tooltip={props.paused ? 'Resume chart' : 'Pause chart'} onClick={props.togglePause}>
+        {props.paused ? <Play /> : <Pause />}
+      </CustomIconButton>
+      <SettingsButton parameters={props.parameters} />
+      <CustomIconButton tooltip="Remove chart" onClick={props.onRemove}>
+        <Clear data-test-type="RemoveChart" data-test={`${props.parameters.topic}-${props.parameters.dotPath || ''}`} />
+      </CustomIconButton>
+    </div>
+  )
+}

app/src/components/ChartPanel/ChartSettings/ColorSettings.tsx

@@ -0,0 +1,71 @@
+import * as React from 'react'
+import { bindActionCreators } from 'redux'
+import { chartActions } from '../../../actions'
+import { ChartParameters } from '../../../reducers/Charts'
+import { connect } from 'react-redux'
+import { Menu, MenuItem } from '@material-ui/core'
+import { colors as createColors } from './colors'
+
+function chartParametersForColor(chart: ChartParameters, color?: string) {
+  return {
+    color,
+    topic: chart.topic,
+    dotPath: chart.dotPath,
+  }
+}
+
+const colors: Array<string> = createColors()
+
+function ColorSettings(props: {
+  chart: ChartParameters
+  actions: {
+    chart: typeof chartActions
+  }
+  anchorEl?: Element
+  open: boolean
+  close: () => void
+}) {
+  const setColor = React.useCallback(
+    (color?: string) => props.actions.chart.updateChart(chartParametersForColor(props.chart, color)),
+    [props.chart]
+  )
+
+  const menuItems = React.useMemo(() => {
+    return colors.map(color => (
+      <MenuItem
+        style={{ minWidth: '8em', minHeight: '36px', backgroundColor: color, textAlign: 'center' }}
+        key={color}
+        onClick={() => setColor(color)}
+      >
+        {props.chart.color === color ? 'X' : ''}
+      </MenuItem>
+    ))
+  }, [colors, props.chart])
+
+  return (
+    <Menu anchorEl={props.anchorEl} open={props.open} onClose={props.close}>
+      <MenuItem
+        style={{ minWidth: '8em', minHeight: '36px', textAlign: 'center' }}
+        key="none"
+        onClick={() => setColor()}
+        selected={props.chart.color === undefined}
+      >
+        default
+      </MenuItem>
+      {menuItems}
+    </Menu>
+  )
+}
+
+const mapDispatchToProps = (dispatch: any) => {
+  return {
+    actions: {
+      chart: bindActionCreators(chartActions, dispatch),
+    },
+  }
+}
+
+export default connect(
+  undefined,
+  mapDispatchToProps
+)(ColorSettings)

app/src/components/ChartPanel/ChartSettings/InterpolationSettings.tsx

@@ -0,0 +1,66 @@
+import * as React from 'react'
+import { AppState } from '../../../reducers'
+import { bindActionCreators } from 'redux'
+import { chartActions } from '../../../actions'
+import { ChartParameters, PlotCurveTypes } from '../../../reducers/Charts'
+import { connect } from 'react-redux'
+import { Menu, MenuItem } from '@material-ui/core'
+
+function chartParametersForAction(chart: ChartParameters, action: string) {
+  return {
+    topic: chart.topic,
+    dotPath: chart.dotPath,
+    interpolation: action as any,
+  }
+}
+
+const curves: Array<PlotCurveTypes> = ['curve', 'linear', 'step_after', 'step_before', 'cubic_basis_spline']
+
+function InterpolationSettings(props: {
+  chart: ChartParameters
+  actions: {
+    chart: typeof chartActions
+  }
+  anchorEl?: Element
+  open: boolean
+  close: () => void
+}) {
+  const callbacks = React.useMemo(() => {
+    const createCurveCallback = (curve: PlotCurveTypes) => () => {
+      props.actions.chart.updateChart(chartParametersForAction(props.chart, curve))
+    }
+
+    const callbacks: { [key: string]: () => void } = {}
+    for (const curve of curves) {
+      callbacks[curve] = createCurveCallback(curve)
+    }
+    return callbacks
+  }, [curves])
+
+  const menuItems = React.useMemo(() => {
+    return curves.map(curve => (
+      <MenuItem key={curve} onClick={callbacks[curve]} selected={props.chart.interpolation === curve}>
+        {curve.replace(/_/g, ' ')}
+      </MenuItem>
+    ))
+  }, [curves, props.chart])
+
+  return (
+    <Menu anchorEl={props.anchorEl} open={props.open} onClose={props.close}>
+      {menuItems}
+    </Menu>
+  )
+}
+
+const mapDispatchToProps = (dispatch: any) => {
+  return {
+    actions: {
+      chart: bindActionCreators(chartActions, dispatch),
+    },
+  }
+}
+
+export default connect(
+  undefined,
+  mapDispatchToProps
+)(InterpolationSettings)

app/src/components/ChartPanel/ChartSettings/MoveUp.tsx

@@ -0,0 +1,35 @@
+import * as React from 'react'
+import { ChartParameters } from '../../../reducers/Charts'
+import { Menu, MenuItem, TextField, Typography } from '@material-ui/core'
+import { connect } from 'react-redux'
+import { bindActionCreators } from 'redux'
+import { chartActions } from '../../../actions'
+
+function MoveUp(props: { actions: { chart: typeof chartActions }; chart: ChartParameters; close: () => void }) {
+  const moveUp = React.useCallback(() => {
+    props.actions.chart.moveChartUp({
+      topic: props.chart.topic,
+      dotPath: props.chart.dotPath,
+    })
+    props.close()
+  }, [props.chart])
+
+  return (
+    <MenuItem key="size" onClick={moveUp}>
+      Move up
+    </MenuItem>
+  )
+}
+
+const mapDispatchToProps = (dispatch: any) => {
+  return {
+    actions: {
+      chart: bindActionCreators(chartActions, dispatch),
+    },
+  }
+}
+
+export default connect(
+  undefined,
+  mapDispatchToProps
+)(MoveUp)

app/src/components/ChartPanel/ChartSettings/RangeSettings.tsx

@@ -0,0 +1,120 @@
+import React, { useCallback, useState, ChangeEvent, MouseEvent, useRef, useEffect, useMemo } from 'react'
+import { ChartParameters } from '../../../reducers/Charts'
+import { Menu, TextField, Typography } from '@material-ui/core'
+import { connect } from 'react-redux'
+import { bindActionCreators } from 'redux'
+import { chartActions } from '../../../actions'
+import { KeyCodes } from '../../../utils/KeyCodes'
+
+interface Props {
+  actions: { chart: typeof chartActions }
+  chart: ChartParameters
+  anchorEl?: Element
+  open: boolean
+  onClose: () => void
+}
+
+function RangeSettings(props: Props) {
+  const dismissClick = useCallback((e: MouseEvent) => e.stopPropagation(), [])
+  const [rangeFrom, setRangeFrom] = useState<string | number | undefined>(props.chart.range && props.chart.range.from)
+  const [rangeTo, setRangeTo] = useState<string | number | undefined>(props.chart.range && props.chart.range.to)
+  useRangeStateToFireUpdateAction(rangeFrom, rangeTo, props)
+  const rangeFromRef = useRef<HTMLInputElement>()
+  const rangeToRef = useRef<HTMLInputElement>()
+
+  useEffect(() => {
+    rangeFromRef.current && rangeFromRef.current.focus()
+  }, [props.open])
+
+  const handleKeyEvents = (e: React.KeyboardEvent<any>) => {
+    if (e.keyCode === KeyCodes.tab) {
+      // Switch focus between those two
+      if (document.activeElement === rangeFromRef.current) {
+        rangeToRef.current && rangeToRef.current.focus()
+      } else {
+        rangeFromRef.current && rangeFromRef.current.focus()
+      }
+
+      // Prevent closing the menu
+      e.stopPropagation()
+      // Prevent default tab behavior (focus/blur)
+      e.preventDefault()
+    } else if (e.keyCode === KeyCodes.enter) {
+      props.onClose()
+    }
+  }
+
+  const setFromHandler = useCallback((e: ChangeEvent<HTMLInputElement>) => setRangeFrom(e.target.value), [])
+  const setToHandler = useCallback((e: ChangeEvent<HTMLInputElement>) => setRangeTo(e.target.value), [])
+  return useMemo(
+    () => (
+      <Menu
+        style={{ textAlign: 'center' }}
+        keepMounted={true}
+        anchorEl={props.anchorEl}
+        open={props.open}
+        onClose={props.onClose}
+        onKeyDownCapture={handleKeyEvents}
+      >
+        <Typography>Define custom ranges for the Y-Axis</Typography>
+        <div style={{ padding: '0 16px' }}>
+          <TextField
+            inputProps={{
+              ref: rangeFromRef,
+            }}
+            autoFocus={true}
+            style={{ marginTop: '0' }}
+            label="from"
+            value={rangeFrom}
+            onChange={setFromHandler}
+            margin="normal"
+          />
+          <TextField
+            inputProps={{
+              ref: rangeToRef,
+            }}
+            style={{ marginLeft: '8px', marginTop: '0' }}
+            onClick={dismissClick}
+            label="to"
+            value={rangeTo}
+            onChange={setToHandler}
+            margin="normal"
+          />
+        </div>
+      </Menu>
+    ),
+    [rangeFrom, rangeTo, props.open]
+  )
+}
+
+const mapDispatchToProps = (dispatch: any) => {
+  return {
+    actions: {
+      chart: bindActionCreators(chartActions, dispatch),
+    },
+  }
+}
+
+export default connect(
+  undefined,
+  mapDispatchToProps
+)(RangeSettings)
+
+function useRangeStateToFireUpdateAction(
+  rangeFrom: string | number | undefined,
+  rangeTo: string | number | undefined,
+  props: Props
+) {
+  React.useEffect(() => {
+    const from = parseFloat(rangeFrom as any)
+    const to = parseFloat(rangeTo as any)
+    props.actions.chart.updateChart({
+      topic: props.chart.topic,
+      dotPath: props.chart.dotPath,
+      range: {
+        from: isNaN(from) ? undefined : from,
+        to: isNaN(to) ? undefined : to,
+      },
+    })
+  }, [rangeFrom, rangeTo])
+}

app/src/components/ChartPanel/ChartSettings/SettingsButton.tsx

@@ -0,0 +1,30 @@
+import * as React from 'react'
+import ChartSettings from '.'
+import CustomIconButton from '../../helper/CustomIconButton'
+import MoreVertIcon from '@material-ui/icons/Settings'
+import { ChartParameters } from '../../../reducers/Charts'
+
+export function SettingsButton(props: { parameters: ChartParameters }) {
+  const [visible, setVisible] = React.useState(false)
+  const settingsRef = React.useRef()
+  const toggleSettings = React.useCallback(() => {
+    setVisible(!visible)
+  }, [visible])
+
+  const close = React.useCallback(() => {
+    setVisible(false)
+  }, [])
+
+  return (
+    <span>
+      <ChartSettings open={visible} close={close} anchorEl={settingsRef} chart={props.parameters} />
+      <CustomIconButton tooltip="Chart settings" onClick={toggleSettings}>
+        <MoreVertIcon
+          ref={settingsRef as any}
+          data-test-type="ChartSettings"
+          data-test={`${props.parameters.topic}-${props.parameters.dotPath || ''}`}
+        />
+      </CustomIconButton>
+    </span>
+  )
+}

app/src/components/ChartPanel/ChartSettings/Size.tsx

@@ -0,0 +1,53 @@
+import * as React from 'react'
+import { ChartParameters } from '../../../reducers/Charts'
+import { Menu, MenuItem, TextField, Typography } from '@material-ui/core'
+import { connect } from 'react-redux'
+import { bindActionCreators } from 'redux'
+import { chartActions } from '../../../actions'
+
+function Size(props: {
+  actions: { chart: typeof chartActions }
+  chart: ChartParameters
+  anchorEl?: Element
+  open: boolean
+  close: () => void
+}) {
+  const setChartWidth = (width?: 'big' | 'medium' | 'small') => () => {
+    props.actions.chart.updateChart({
+      width,
+      topic: props.chart.topic,
+      dotPath: props.chart.dotPath,
+    })
+    props.close()
+  }
+
+  return (
+    <Menu anchorEl={props.anchorEl} open={props.open} onClose={props.close}>
+      <MenuItem selected={props.chart.width === undefined} onClick={setChartWidth()}>
+        auto
+      </MenuItem>
+      <MenuItem selected={props.chart.width === 'big'} onClick={setChartWidth('big')}>
+        100% width
+      </MenuItem>
+      <MenuItem selected={props.chart.width === 'medium'} onClick={setChartWidth('medium')}>
+        50% width
+      </MenuItem>
+      <MenuItem selected={props.chart.width === 'small'} onClick={setChartWidth('small')}>
+        33% width
+      </MenuItem>
+    </Menu>
+  )
+}
+
+const mapDispatchToProps = (dispatch: any) => {
+  return {
+    actions: {
+      chart: bindActionCreators(chartActions, dispatch),
+    },
+  }
+}
+
+export default connect(
+  undefined,
+  mapDispatchToProps
+)(Size)

app/src/components/ChartPanel/ChartSettings/TimeRangeSettings.tsx

@@ -0,0 +1,102 @@
+import React, { ChangeEvent, MouseEvent, useCallback, useEffect, useMemo, useRef, useState } from 'react'
+import { bindActionCreators } from 'redux'
+import { Button, Menu, TextField, Typography } from '@material-ui/core'
+import { chartActions } from '../../../actions'
+import { ChartParameters } from '../../../reducers/Charts'
+import { connect } from 'react-redux'
+const parseDuration = require('parse-duration')
+
+interface Props {
+  actions: { chart: typeof chartActions }
+  chart: ChartParameters
+  anchorEl?: Element
+  open: boolean
+  onClose: () => void
+}
+
+function TimeRangeSettings(props: Props) {
+  const dismissClick = useCallback((e: MouseEvent) => e.stopPropagation(), [])
+  const [value, setValue] = useState<string | undefined>(
+    props.chart.timeRange ? props.chart.timeRange.until : undefined
+  )
+  const ranges = ['all', '10s', '30s', '1m', '5m', '15m', '1h', '6h', '1d']
+
+  const manuallySetIntervalHandler = useCallback((e: React.ChangeEvent<HTMLInputElement>) => {
+    setValue(e.target.value)
+  }, [])
+
+  useEffect(() => {
+    if (!value) {
+      props.actions.chart.updateChart({
+        ...props.chart,
+        timeRange: undefined,
+      })
+      return
+    }
+
+    const canBeParsed = Boolean(parseDuration(value))
+    if (canBeParsed) {
+      props.actions.chart.updateChart({
+        ...props.chart,
+        timeRange: {
+          until: value,
+        },
+      })
+    }
+  }, [value])
+
+  return useMemo(() => {
+    const createRangeHandler = (range: string) => (e: React.MouseEvent) => setValue(range === 'all' ? undefined : range)
+
+    return (
+      <Menu
+        style={{ textAlign: 'center' }}
+        keepMounted={true}
+        anchorEl={props.anchorEl}
+        open={props.open}
+        onClose={props.onClose}
+      >
+        <Typography>Chart data within a time interval</Typography>
+        <div style={{ padding: '0 16px', width: '275px', textAlign: 'center' }}>
+          {ranges.map(r => {
+            return (
+              <Button
+                style={{ margin: '4px', textTransform: 'none' }}
+                variant="contained"
+                key={r}
+                onClick={createRangeHandler(r)}
+              >
+                {r}
+              </Button>
+            )
+          })}
+        </div>
+        <Typography style={{ fontSize: '0.75em' }}>
+          <i>Limited to 500 data points</i>
+        </Typography>
+        <br />
+        <TextField
+          style={{ marginLeft: '8px', marginTop: '0' }}
+          onClick={dismissClick}
+          label="custom interval"
+          value={value || ''}
+          onChange={manuallySetIntervalHandler}
+          margin="normal"
+        />
+      </Menu>
+    )
+  }, [value, props.open])
+}
+
+const mapDispatchToProps = (dispatch: any) => {
+  return {
+    actions: {
+      chart: bindActionCreators(chartActions, dispatch),
+    },
+  }
+}
+
+export default connect(
+  undefined,
+  mapDispatchToProps
+)(TimeRangeSettings)

app/src/components/ChartPanel/ChartSettings/colors.ts

@@ -0,0 +1,46 @@
+import {
+  amber,
+  orange,
+  pink,
+  purple,
+  deepPurple,
+  teal,
+  red,
+  green,
+  lime,
+  indigo,
+  yellow,
+  brown,
+  blueGrey,
+} from '@material-ui/core/colors'
+
+export function colors() {
+  function colorToInt(color: string): [number, number, number] {
+    const str = color.replace('#', '')
+    return [parseInt(str.slice(0, 2), 16), parseInt(str.slice(2, 4), 16), parseInt(str.slice(4, 6), 16)]
+  }
+  function colorCompare(colorA: string, colorB: string) {
+    const a = colorToInt(colorA)
+    const b = colorToInt(colorB)
+    return Math.sqrt(Math.pow(a[0] - b[0], 2) + Math.pow(a[1] - b[1], 2) + Math.pow(a[2] - b[2], 2))
+  }
+  const colors: Array<string> = [
+    brown,
+    blueGrey,
+    amber,
+    orange,
+    pink,
+    purple,
+    deepPurple,
+    teal,
+    red,
+    green,
+    lime,
+    indigo,
+    yellow,
+  ]
+    .map(color => [color[200], color[500], color[700]])
+    .reduce((a, b) => a.concat(b), [])
+    .sort((a, b) => colorCompare(a, b))
+  return colors
+}

app/src/components/ChartPanel/ChartSettings/index.tsx

@@ -0,0 +1,97 @@
+import * as React from 'react'
+import ColorSettings from './ColorSettings'
+import InterpolationSettings from './InterpolationSettings'
+import MoveUp from './MoveUp'
+import RangeSettings from './RangeSettings'
+import Size from './Size'
+import TimeRangeSettings from './TimeRangeSettings'
+import { ChartParameters } from '../../../reducers/Charts'
+import { Menu, MenuItem } from '@material-ui/core'
+
+function ChartSettings(props: {
+  open: boolean
+  close: () => void
+  chart: ChartParameters
+  anchorEl: React.MutableRefObject<undefined>
+}) {
+  const [rangeVisible, setRangeVisible] = React.useState(false)
+  const [timeRangeVisible, setTimeRangeVisible] = React.useState(false)
+  const [interpolationVisible, setInterpolationVisible] = React.useState(false)
+  const [sizeVisible, setSizeVisible] = React.useState(false)
+  const [colorVisible, setColorVisible] = React.useState(false)
+
+  const toggleRange = React.useCallback(() => {
+    if (open) {
+      props.close()
+    }
+    setRangeVisible(!rangeVisible)
+  }, [rangeVisible, open])
+
+  const toggleTimeRange = React.useCallback(() => {
+    if (open) {
+      props.close()
+    }
+    setTimeRangeVisible(!timeRangeVisible)
+  }, [timeRangeVisible, open])
+
+  const toggleInterpolation = React.useCallback(() => {
+    if (open) {
+      props.close()
+    }
+    setInterpolationVisible(!interpolationVisible)
+  }, [interpolationVisible, open])
+
+  const toggleSize = React.useCallback(() => {
+    if (open) {
+      props.close()
+    }
+    setSizeVisible(!sizeVisible)
+  }, [sizeVisible, open])
+
+  const toggleColor = React.useCallback(() => {
+    if (open) {
+      props.close()
+    }
+    setColorVisible(!colorVisible)
+  }, [colorVisible, open])
+
+  return (
+    <span>
+      <Menu id="long-menu" anchorEl={props.anchorEl.current} open={props.open} onClose={props.close}>
+        <MenuItem key="range" onClick={toggleRange}>
+          Set range
+        </MenuItem>
+        <MenuItem key="timeRange" onClick={toggleTimeRange}>
+          Time range
+        </MenuItem>
+        <MenuItem key="interpolation" onClick={toggleInterpolation}>
+          Curve interpolation
+        </MenuItem>
+        <MenuItem key="size" onClick={toggleSize}>
+          Size
+        </MenuItem>
+        <MenuItem key="color" onClick={toggleColor}>
+          Color
+        </MenuItem>
+        <MoveUp chart={props.chart} close={props.close} />
+      </Menu>
+      <RangeSettings chart={props.chart} anchorEl={props.anchorEl.current} open={rangeVisible} onClose={toggleRange} />
+      <TimeRangeSettings
+        chart={props.chart}
+        anchorEl={props.anchorEl.current}
+        open={timeRangeVisible}
+        onClose={toggleTimeRange}
+      />
+      <InterpolationSettings
+        chart={props.chart}
+        anchorEl={props.anchorEl.current}
+        open={interpolationVisible}
+        close={toggleInterpolation}
+      />
+      <Size chart={props.chart} anchorEl={props.anchorEl.current} open={sizeVisible} close={toggleSize} />
+      <ColorSettings chart={props.chart} anchorEl={props.anchorEl.current} open={colorVisible} close={toggleColor} />
+    </span>
+  )
+}
+
+export default ChartSettings

app/src/components/ChartPanel/ChartTitle.tsx

@@ -0,0 +1,29 @@
+import * as React from 'react'
+import { ChartParameters } from '../../reducers/Charts'
+import { Typography, Theme, withStyles } from '@material-ui/core'
+
+function ChartTitle(props: { parameters: ChartParameters; classes: any }) {
+  const { classes, parameters } = props
+  return (
+    <div style={{ flexGrow: 1, overflow: 'hidden', textOverflow: 'ellipsis' }}>
+      <Typography variant="caption" className={classes.topic}>
+        {parameters.dotPath ? parameters.dotPath : parameters.topic}
+      </Typography>
+      <br />
+      <Typography variant="caption" className={classes.topic}>
+        {parameters.dotPath ? parameters.topic : <span dangerouslySetInnerHTML={{ __html: '&nbsp;' }}></span>}
+      </Typography>
+    </div>
+  )
+}
+
+const styles = (theme: Theme) => ({
+  topic: {
+    wordBreak: 'break-all' as 'break-all',
+    whiteSpace: 'nowrap' as 'nowrap',
+    overflow: 'hidden' as 'hidden',
+    textOverflow: 'ellipsis' as 'ellipsis',
+  },
+})
+
+export default withStyles(styles)(ChartTitle)

app/src/components/ChartPanel/ChartWithTreeNode.tsx

@@ -0,0 +1,20 @@
+import * as q from '../../../../backend/src/Model'
+import React from 'react'
+import Chart from './Chart'
+import { ChartParameters } from '../../reducers/Charts'
+import { usePollingToFetchTreeNode } from '../helper/usePollingToFetchTreeNode'
+
+interface Props {
+  tree?: q.Tree<any>
+  parameters: ChartParameters
+}
+
+export function ChartWithTreeNode(props: Props) {
+  const { tree, parameters } = props
+  if (!tree) {
+    return null
+  }
+
+  const treeNode = usePollingToFetchTreeNode(tree, parameters.topic)
+  return <Chart treeNode={treeNode} parameters={parameters} />
+}

app/src/components/ChartPanel/index.tsx

@@ -0,0 +1,132 @@
+import * as q from '../../../../backend/src/Model'
+import * as React from 'react'
+import ShowChart from '@material-ui/icons/ShowChart'
+import { AppState } from '../../reducers'
+import { bindActionCreators } from 'redux'
+import { chartActions } from '../../actions'
+import { ChartParameters } from '../../reducers/Charts'
+import { ChartWithTreeNode } from './ChartWithTreeNode'
+import { connect } from 'react-redux'
+import { Grid, Theme, Typography, withStyles } from '@material-ui/core'
+import { List } from 'immutable'
+const { TransitionGroup, CSSTransition } = require('react-transition-group/esm')
+
+interface Props {
+  charts: List<ChartParameters>
+  connectionId?: string
+  tree?: q.Tree<any>
+  actions: {
+    chart: typeof chartActions
+  }
+  classes: any
+}
+
+function spacingForChartCount(count: number): 4 | 6 | 12 {
+  if (count >= 5) {
+    return 4
+  } else if (count >= 2) {
+    return 6
+  } else {
+    return 12
+  }
+}
+
+function mapWidth(width: 'big' | 'medium' | 'small' | undefined, calculatedSpacing: 4 | 6 | 12): 4 | 6 | 12 {
+  switch (width) {
+    case 'big':
+      return 12
+    case 'medium':
+      return 6
+    case 'small':
+      return 4
+    default:
+      return calculatedSpacing
+  }
+}
+
+function ChartPanel(props: Props) {
+  const chartsInView = props.charts.count()
+
+  const [spacing, setSpacing] = React.useState(spacingForChartCount(chartsInView))
+
+  React.useEffect(() => {
+    props.actions.chart.loadCharts()
+  }, [props.connectionId])
+
+  // Update spacing after animations have completed
+  React.useEffect(() => {
+    const newSpacing = spacingForChartCount(chartsInView)
+    if (newSpacing > spacing) {
+      setTimeout(() => setSpacing(newSpacing), 500)
+    } else {
+      setSpacing(newSpacing)
+    }
+  }, [chartsInView])
+
+  const charts = props.charts.map(chartParameters => (
+    <CSSTransition
+      key={`${chartParameters.topic}-${chartParameters.dotPath || ''}`}
+      timeout={{ enter: 500, exit: 500 }}
+      classNames="example"
+    >
+      <Grid item xs={mapWidth(chartParameters.width, spacing)}>
+        <ChartWithTreeNode tree={props.tree} parameters={chartParameters} />
+      </Grid>
+    </CSSTransition>
+  ))
+
+  return (
+    <div className={props.classes.container}>
+      <Grid container spacing={1}>
+        <TransitionGroup component={null} className="example">
+          {charts}
+        </TransitionGroup>
+        {chartsInView === 0 ? <NoCharts key="noCharts" /> : null}
+      </Grid>
+    </div>
+  )
+}
+
+function NoCharts() {
+  return (
+    <div style={{ width: '100%', textAlign: 'center' }}>
+      <Typography variant="h2">No charts selected</Typography>
+      <Typography>Select a numeric values from the value preview.</Typography>
+      <Typography>
+        Click on <ShowChart /> to add a topic / value to this panel.
+      </Typography>
+    </div>
+  )
+}
+
+const mapStateToProps = (state: AppState) => {
+  return {
+    charts: state.charts.get('charts'),
+    connectionId: state.connection.connectionId,
+    tree: state.connection.tree,
+  }
+}
+
+const mapDispatchToProps = (dispatch: any) => {
+  return {
+    actions: {
+      chart: bindActionCreators(chartActions, dispatch),
+    },
+  }
+}
+
+const styles = (theme: Theme) => ({
+  container: {
+    backgroundColor: theme.palette.background.default,
+    width: '100%',
+    height: '100%',
+    padding: '8px',
+    flex: 1,
+    overflow: 'hidden scroll',
+  },
+})
+
+export default connect(
+  mapStateToProps,
+  mapDispatchToProps
+)(withStyles(styles)(ChartPanel))

app/src/components/ConnectionSetup/AdvancedConnectionSettings.tsx

@@ -0,0 +1,170 @@
+import * as React from 'react'
+import Add from '@material-ui/icons/Add'
+import ClearAdornment from '../helper/ClearAdornment'
+import Delete from '@material-ui/icons/Delete'
+import Lock from '@material-ui/icons/Lock'
+import Undo from '@material-ui/icons/Undo'
+import { bindActionCreators } from 'redux'
+import { connect } from 'react-redux'
+import { connectionManagerActions } from '../../actions'
+import { ConnectionOptions } from '../../model/ConnectionOptions'
+import { Theme, withStyles } from '@material-ui/core/styles'
+
+import {
+  Button,
+  Grid,
+  IconButton,
+  TextField,
+  List,
+  ListItem,
+  ListItemText,
+  Tooltip,
+  Typography,
+} from '@material-ui/core'
+
+interface Props {
+  connection: ConnectionOptions
+  classes: any
+  managerActions: typeof connectionManagerActions
+}
+
+interface State {
+  subscription: string
+}
+
+class ConnectionSettings extends React.Component<Props, State> {
+  constructor(props: any) {
+    super(props)
+    this.state = { subscription: '' }
+  }
+
+  private handleChange = (name: string) => (event: any) => {
+    this.props.managerActions.updateConnection(this.props.connection.id, {
+      [name]: event.target.value,
+    })
+  }
+
+  private renderSubscriptions() {
+    const connection = this.props.connection
+    return connection.subscriptions.map(subscription => (
+      <Subscription
+        deleteAction={() => this.props.managerActions.deleteSubscription(subscription, connection.id)}
+        subscription={subscription}
+        key={subscription}
+      />
+    ))
+  }
+
+  public render() {
+    const { classes } = this.props
+    return (
+      <div>
+        <form className={classes.container} noValidate={true} autoComplete="off">
+          <Grid container={true} spacing={3}>
+            <Grid item={true} xs={10} className={classes.gridPadding}>
+              <TextField
+                className={classes.fullWidth}
+                label="Subscription"
+                margin="normal"
+                onChange={(event: React.ChangeEvent<HTMLInputElement>) =>
+                  this.setState({ subscription: event.target.value })
+                }
+              />
+            </Grid>
+            <Grid item={true} xs={2} className={classes.gridPadding}>
+              <Button
+                className={classes.button}
+                color="secondary"
+                onClick={() =>
+                  this.props.managerActions.addSubscription(this.state.subscription, this.props.connection.id)
+                }
+                variant="contained"
+              >
+                <Add /> Add
+              </Button>
+            </Grid>
+            <Grid item={true} xs={12} style={{ padding: 0 }}>
+              <List className={`${classes.topicList} advanced-connection-settings-topic-list`} component="nav">
+                <div className={classes.list}>{this.renderSubscriptions()}</div>
+              </List>
+            </Grid>
+            <Grid item={true} xs={7} className={classes.gridPadding}>
+              <TextField
+                className={classes.fullWidth}
+                label="MQTT Client ID"
+                margin="normal"
+                value={this.props.connection.clientId}
+                onChange={this.handleChange('clientId')}
+              />
+            </Grid>
+            <Grid item={true} xs={3} className={classes.gridPadding}>
+              <div>
+                <Tooltip title="Manage tls connection certificates" placement="top">
+                  <Button
+                    variant="contained"
+                    className={classes.button}
+                    onClick={() => this.props.managerActions.toggleCertificateSettings()}
+                  >
+                    <Lock /> Certificates
+                  </Button>
+                </Tooltip>
+              </div>
+            </Grid>
+            <Grid item={true} xs={2} className={classes.gridPadding}>
+              <Button
+                variant="contained"
+                className={classes.button}
+                onClick={this.props.managerActions.toggleAdvancedSettings}
+              >
+                <Undo /> Back
+              </Button>
+            </Grid>
+          </Grid>
+        </form>
+      </div>
+    )
+  }
+}
+
+const Subscription = (props: { subscription: string; deleteAction: any }) => {
+  return (
+    <ListItem style={{ padding: '0 0 0 8px' }}>
+      <ListItemText>
+        <IconButton onClick={props.deleteAction} style={{ padding: '6px' }}>
+          <Delete />
+        </IconButton>
+        {props.subscription}
+      </ListItemText>
+    </ListItem>
+  )
+}
+
+const mapDispatchToProps = (dispatch: any) => {
+  return {
+    managerActions: bindActionCreators(connectionManagerActions, dispatch),
+  }
+}
+
+const styles = (theme: Theme) => ({
+  fullWidth: {
+    width: '100%',
+  },
+  gridPadding: {
+    padding: '0 12px !important',
+  },
+  topicList: {
+    height: '180px',
+    overflowY: 'scroll' as 'scroll',
+    margin: '8px 16px',
+    backgroundColor: theme.palette.background.default,
+  },
+  button: {
+    marginTop: theme.spacing(3),
+    float: 'right' as 'right',
+  },
+})
+
+export default connect(
+  undefined,
+  mapDispatchToProps
+)(withStyles(styles)(ConnectionSettings))

app/src/components/ConnectionSetup/CertificateFileSelection.tsx

@@ -0,0 +1,87 @@
+import * as React from 'react'
+import Add from '@material-ui/icons/Add'
+import ClearAdornment from '../helper/ClearAdornment'
+import Delete from '@material-ui/icons/Delete'
+import Lock from '@material-ui/icons/Lock'
+import { bindActionCreators } from 'redux'
+import { Button, Theme, Tooltip, Typography } from '@material-ui/core'
+import { CertificateParameters, ConnectionOptions } from '../../model/ConnectionOptions'
+import { CertificateTypes } from '../../actions/ConnectionManager'
+import { connect } from 'react-redux'
+import { connectionManagerActions } from '../../actions'
+import { withStyles } from '@material-ui/styles'
+
+function CertificateFileSelection(props: {
+  certificateType: CertificateTypes
+  title: string
+  certificate?: CertificateParameters
+  classes: any
+  actions: {
+    connectionManager: typeof connectionManagerActions
+  }
+  connection: ConnectionOptions
+}) {
+  const clearCertificate = React.useCallback(() => {
+    props.actions.connectionManager.updateConnection(props.connection.id, {
+      [props.certificateType]: undefined,
+    })
+  }, [props.connection, props.certificateType])
+
+  return (
+    <span>
+      <Tooltip title="Select certificate" placement="top">
+        <Button
+          variant="contained"
+          className={props.classes.button}
+          onClick={() => props.actions.connectionManager.selectCertificate(props.certificateType, props.connection.id)}
+        >
+          <Lock /> {props.title}
+        </Button>
+      </Tooltip>
+      <ClearCertificate classes={props.classes} certificate={props.certificate} action={clearCertificate} />
+    </span>
+  )
+}
+
+function ClearCertificate(props: { classes: any; certificate?: CertificateParameters; action: () => void }) {
+  if (!props.certificate) {
+    return null
+  }
+
+  return (
+    <Tooltip title={props.certificate.name}>
+      <Typography className={props.classes.certificateName}>
+        <ClearAdornment action={props.action} value={props.certificate.name} />
+        {props.certificate.name}
+      </Typography>
+    </Tooltip>
+  )
+}
+
+const mapDispatchToProps = (dispatch: any) => {
+  return {
+    actions: {
+      connectionManager: bindActionCreators(connectionManagerActions, dispatch),
+    },
+  }
+}
+
+const styles = (theme: Theme) => ({
+  certificateName: {
+    width: '100%',
+    height: 'calc(1em + 4px)',
+    overflow: 'hidden' as 'hidden',
+    whiteSpace: 'nowrap' as 'nowrap',
+    textOverflow: 'ellipsis' as 'ellipsis',
+    color: theme.palette.text.hint,
+  },
+  button: {
+    marginTop: theme.spacing(3),
+    marginRight: theme.spacing(2),
+  },
+})
+
+export default connect(
+  undefined,
+  mapDispatchToProps
+)(withStyles(styles)(CertificateFileSelection))

app/src/components/ConnectionSetup/Certificates.tsx

@@ -0,0 +1,110 @@
+import * as React from 'react'
+import CertificateFileSelection from './CertificateFileSelection'
+import Undo from '@material-ui/icons/Undo'
+import { bindActionCreators } from 'redux'
+import { Button, Grid } from '@material-ui/core'
+import { connect } from 'react-redux'
+import { connectionManagerActions } from '../../actions'
+import { ConnectionOptions } from '../../model/ConnectionOptions'
+import { Theme, withStyles } from '@material-ui/core/styles'
+
+interface Props {
+  connection: ConnectionOptions
+  classes: any
+  managerActions: typeof connectionManagerActions
+}
+
+interface State {
+  subscription: string
+}
+
+class Certificates extends React.Component<Props, State> {
+  constructor(props: any) {
+    super(props)
+    this.state = { subscription: '' }
+  }
+
+  private handleChange = (name: string) => (event: any) => {
+    this.props.managerActions.updateConnection(this.props.connection.id, {
+      [name]: event.target.value,
+    })
+  }
+
+  private renderCertificateInfo() {
+    if (!this.props.connection.selfSignedCertificate) {
+      return null
+    }
+
+    return <span />
+  }
+
+  public render() {
+    const { classes } = this.props
+    return (
+      <div>
+        <form noValidate={true} autoComplete="off">
+          <Grid container={true} spacing={3}>
+            <Grid item={true} xs={12} className={classes.gridPadding}>
+              <CertificateFileSelection
+                connection={this.props.connection}
+                certificate={this.props.connection.selfSignedCertificate}
+                title="Server Certificate (CA)"
+                certificateType="selfSignedCertificate"
+              />
+            </Grid>
+            <Grid item={true} xs={12} className={classes.gridPadding}>
+              <CertificateFileSelection
+                connection={this.props.connection}
+                certificate={this.props.connection.clientCertificate}
+                title="Client Certificate"
+                certificateType="clientCertificate"
+              />
+            </Grid>
+            <Grid item={true} xs={12} className={classes.gridPadding}>
+              <CertificateFileSelection
+                connection={this.props.connection}
+                certificate={this.props.connection.clientKey}
+                title="Client Key"
+                certificateType="clientKey"
+              />
+            </Grid>
+            <Grid item={true} xs={2} className={classes.gridPadding}>
+              <br />
+              <Button
+                variant="contained"
+                className={classes.button}
+                onClick={this.props.managerActions.toggleCertificateSettings}
+              >
+                <Undo /> Back
+              </Button>
+            </Grid>
+          </Grid>
+        </form>
+      </div>
+    )
+  }
+}
+
+const mapDispatchToProps = (dispatch: any) => {
+  return {
+    managerActions: bindActionCreators(connectionManagerActions, dispatch),
+  }
+}
+
+const styles = (theme: Theme) => ({
+  fullWidth: {
+    width: '100%',
+  },
+  gridPadding: {
+    padding: '0 12px !important',
+  },
+  button: {
+    marginTop: theme.spacing(3),
+    marginRight: theme.spacing(2),
+  },
+})
+
+export default connect(
+  undefined,
+  mapDispatchToProps
+)(withStyles(styles)(Certificates))

app/src/components/ConnectionSetup/ConnectButton.tsx

@@ -0,0 +1,25 @@
+import ConnectionHealthIndicator from '../helper/ConnectionHealthIndicator'
+import PowerSettingsNew from '@material-ui/icons/PowerSettingsNew'
+import React from 'react'
+import { Button } from '@material-ui/core'
+
+function ConnectButton(props: { connecting: boolean; classes: any; toggle: () => void }) {
+  const { classes, toggle, connecting } = props
+
+  if (connecting) {
+    return (
+      <Button variant="contained" color="primary" className={classes.button} onClick={toggle}>
+        <ConnectionHealthIndicator />
+        &nbsp;&nbsp;Abort
+      </Button>
+    )
+  }
+
+  return (
+    <Button variant="contained" color="primary" className={classes.button} onClick={toggle}>
+      <PowerSettingsNew /> Connect
+    </Button>
+  )
+}
+
+export default ConnectButton

app/src/components/ConnectionSetup/Connection.tsx

@@ -1,284 +0,0 @@
-import * as React from 'react'
-import {
-  Typography, Toolbar, Modal,
-  MenuItem, Button, Grid, Paper,
-  TextField, Switch, FormControlLabel,
-  CircularProgress,
-} from '@material-ui/core'
-import { withStyles, Theme, StyleRulesCallback } from '@material-ui/core/styles'
-import Notification from './Notification'
-import { MqttOptions, DataSourceState } from '../../../../backend/src/DataSource'
-import { addMqttConnectionEvent, makeConnectionStateEvent, removeConnection, rendererEvents } from '../../../../events'
-import sha1 = require('sha1')
-
-interface Props {
-  classes: {[s: string]: string}
-  theme: Theme
-  onAbort: () => void,
-  onConnection: (connectionId: string) => void
-}
-
-const protocols = [
-  'mqtt://',
-  'ws://',
-]
-
-interface State {
-  connecting: boolean
-  connectionId?: string
-  error?: Error
-  visible: boolean
-  host: string
-  protocol: string
-  port: number
-  tls: boolean
-  certValidation: boolean
-  clientId: string
-  username: string
-  password: string
-}
-
-declare var window: any
-
-class Connection extends React.Component<Props, State> {
-  constructor(props: any) {
-    super(props)
-    const storedSettingsString = window.localStorage.getItem('connectionSettings')
-    let storedSettings
-    try {
-      storedSettings = storedSettingsString ? JSON.parse(storedSettingsString) : undefined
-    } catch {
-      window.localStorage.setItem('connectionSettings', undefined)
-    }
-
-    const defaultState = {
-      visible: true,
-      host: 'nodered',
-      protocol: protocols[0],
-      port: 1883,
-      tls: false,
-      certValidation: true,
-      clientId: '',
-      username: '',
-      password: '',
-      connecting: false,
-      connectionId: undefined,
-    }
-
-    this.state = Object.assign({}, defaultState, storedSettings)
-  }
-
-  private saveConnectionSettings() {
-    window.localStorage.setItem('connectionSettings', JSON.stringify(this.state))
-  }
-
-  private optionsFromState(): MqttOptions {
-    const protocol = this.state.protocol === 'tcp://' ? 'mqtt://' : this.state.protocol
-    const url = `${protocol}${this.state.host}:${this.state.port}`
-
-    return {
-      url,
-      username: this.state.username || undefined,
-      password: this.state.username || undefined,
-      tls: this.state.tls,
-      certValidation: this.state.certValidation,
-    }
-  }
-
-  private connect() {
-    this.setState({
-      connecting: true,
-    })
-
-    const options = this.optionsFromState()
-    const connectionId = (sha1(Math.random() + JSON.stringify(options)).slice(0, 8)) as string
-    this.setState({ connectionId })
-    rendererEvents.emit(addMqttConnectionEvent, { options, id: connectionId })
-    const event = makeConnectionStateEvent(connectionId)
-
-    rendererEvents.subscribe(event, (state: DataSourceState) => {
-      console.log(state)
-      if (state.connected) {
-        this.props.onConnection(connectionId)
-        this.setState({ visible: false })
-      } else if (state.error) {
-        console.log('error', state.error)
-        this.setState({ error: state.error })
-      }
-    })
-  }
-
-  private disconnect() {
-    this.setState({
-      connecting: false,
-    })
-    rendererEvents.emit(removeConnection, this.state.connectionId)
-  }
-
-  public static styles: StyleRulesCallback<string> = (theme: Theme) => {
-    return {
-      root: {
-        minWidth: 550,
-        maxWidth: 650,
-        backgroundColor: theme.palette.background.default,
-        margin: '14vh auto auto auto',
-        padding: `${2 * theme.spacing.unit}px`,
-        outline: 'none',
-      },
-      title: {
-        color: theme.palette.text.primary,
-      },
-      paper: {
-        padding: theme.spacing.unit * 2,
-        textAlign: 'center',
-        color: theme.palette.text.secondary,
-      },
-      textField: {
-        width: '100%',
-      },
-      switch: {
-        marginTop: `${1 * theme.spacing.unit}px`,
-      },
-      button: {
-        margin: theme.spacing.unit,
-      },
-    }
-  }
-
-  private handleChange = (name: string) => (event: any) => {
-    const state: any = {
-      [name]: event.target.value,
-    }
-    this.setState(state)
-  }
-
-  public render() {
-    const { classes } = this.props
-
-    return <Modal open={this.state.visible} disableAutoFocus={true} onClose={() => { console.log('close') }}>
-        <Paper className={classes.root}>
-          <Toolbar>
-            <Typography className={classes.title} variant="h6" color="inherit">MQTT Connection</Typography>
-          </Toolbar>
-          <form className={classes.container} noValidate autoComplete="off">
-            <Grid container spacing={24}>
-              <Grid item xs={2}>
-                <TextField
-                  select
-                  label="Protocol"
-                  className={classes.textField}
-                  value={this.state.protocol}
-                  onChange={this.handleChange('protocol')}
-                  margin="normal"
-                >
-                  {protocols.map((value: string) => (
-                    <MenuItem key={value} value={value}>
-                      {value}
-                    </MenuItem>
-                  ))}
-                </TextField>
-              </Grid>
-              <Grid item xs={7}>
-                <TextField
-                  label="Host"
-                  className={classes.textField}
-                  value={this.state.host}
-                  onChange={this.handleChange('host')}
-                  margin="normal"
-                />
-              </Grid>
-              <Grid item xs={3}>
-                <TextField
-                  label="Port"
-                  className={classes.textField}
-                  value={this.state.port}
-                  onChange={this.handleChange('port')}
-                  margin="normal"
-                />
-              </Grid>
-              <Grid item xs={5}>
-                <TextField
-                  label="Username"
-                  className={classes.textField}
-                  value={this.state.username}
-                  onChange={this.handleChange('username')}
-                  margin="normal"
-                />
-              </Grid>
-              <Grid item xs={5}>
-                <TextField
-                  label="Password"
-                  type="type"
-                  className={classes.textField}
-                  value={this.state.password}
-                  onChange={this.handleChange('password')}
-                  margin="normal"
-                />
-              </Grid>
-              <Grid item xs={4}>
-                <div className={classes.switch}>
-                  <FormControlLabel
-                    control={(
-                      <Switch
-                        checked={this.state.certValidation}
-                        onChange={() => this.setState({ certValidation: !this.state.certValidation })}
-                        color="primary"
-                      />
-                    )}
-                    label="Validate certificate"
-                    labelPlacement="bottom"
-                  />
-                </div>
-              </Grid>
-              <Grid item xs={4}>
-                <div className={classes.switch}>
-                  <FormControlLabel
-                    control={(
-                      <Switch
-                        checked={this.state.tls}
-                        onChange={() => this.setState({ tls: !this.state.tls })}
-                        color="primary"
-                      />
-                    )}
-                    label="Encryption (tls)"
-                    labelPlacement="bottom"
-                  />
-                </div>
-              </Grid>
-              <Grid item xs={4}></Grid>
-            </Grid>
-            <br />
-            <div style={{ textAlign: 'right' }}>
-              <Button variant="contained" color="secondary" className={classes.button} onClick={() => this.saveConnectionSettings()}>
-                Save
-              </Button>
-              { this.renderConnectButton() }
-            </div>
-          </form>
-        </Paper>
-    </Modal>
-  }
-
-  private renderConnectButton() {
-    const { classes } = this.props
-
-    if (this.state.connecting) {
-      return <Button variant="contained" color="primary" className={classes.button} onClick={this.onClickAbort}>
-        <CircularProgress size={22} style={{ marginRight: '10px' }} color="secondary" /> Abort
-      </Button>
-    }
-    return <Button variant="contained" color="primary" className={classes.button} onClick={this.onClickConnect}>
-      Connect
-    </Button>
-  }
-
-  private onClickConnect = () => {
-    this.connect()
-  }
-
-  private onClickAbort = () => {
-    this.disconnect()
-  }
-}
-
-export default withStyles(Connection.styles, { withTheme: true })(Connection)

app/src/components/ConnectionSetup/ConnectionSettings.tsx

@@ -0,0 +1,291 @@
+import ConnectButton from './ConnectButton'
+import Delete from '@material-ui/icons/Delete'
+import React, { useCallback, useState } from 'react'
+import Save from '@material-ui/icons/Save'
+import Settings from '@material-ui/icons/Settings'
+import Visibility from '@material-ui/icons/Visibility'
+import VisibilityOff from '@material-ui/icons/VisibilityOff'
+import { AppState } from '../../reducers'
+import { bindActionCreators } from 'redux'
+import { connect } from 'react-redux'
+import { connectionActions, connectionManagerActions } from '../../actions'
+import { ConnectionOptions, toMqttConnection } from '../../model/ConnectionOptions'
+import { KeyCodes } from '../../utils/KeyCodes'
+import { Theme, withStyles } from '@material-ui/core/styles'
+import { ToggleSwitch } from './ToggleSwitch'
+import { useGlobalKeyEventHandler } from '../../effects/useGlobalKeyEventHandler'
+import {
+  Button,
+  FormControl,
+  Grid,
+  IconButton,
+  Input,
+  InputAdornment,
+  InputLabel,
+  MenuItem,
+  TextField,
+} from '@material-ui/core'
+
+interface Props {
+  connection: ConnectionOptions
+  classes: { [s: string]: string }
+  actions: typeof connectionActions
+  managerActions: typeof connectionManagerActions
+  connected: boolean
+  connecting: boolean
+}
+
+const protocols = ['mqtt', 'ws']
+
+function ConnectionSettings(props: Props) {
+  const [showPassword, setShowPassword] = useState(false)
+
+  const toggleConnect = useCallback(() => {
+    if (props.connecting) {
+      props.actions.disconnect()
+      return
+    }
+
+    if (!props.connection) {
+      return
+    }
+
+    const mqttOptions = toMqttConnection(props.connection)
+    if (mqttOptions) {
+      props.actions.connect(mqttOptions, props.connection.id)
+    }
+  }, [props.connection, props.connecting])
+
+  useGlobalKeyEventHandler(KeyCodes.escape, props.actions.disconnect)
+  useGlobalKeyEventHandler(KeyCodes.enter, toggleConnect, [props.connecting])
+
+  const handleClickShowPassword = useCallback(() => {
+    setShowPassword(!showPassword)
+  }, [showPassword])
+
+  function requiresBasePath() {
+    return props.connection.protocol !== 'mqtt'
+  }
+
+  function renderBasePathInput() {
+    return (
+      <Grid item={true} xs={4}>
+        <TextField
+          label="Basepath"
+          className={props.classes.textField}
+          value={props.connection.basePath}
+          onChange={handleChange('basePath')}
+          margin="normal"
+        />
+      </Grid>
+    )
+  }
+
+  const handleChange = (name: string) => (event: any) => {
+    if (!props.connection) {
+      return
+    }
+
+    updateConnection(name, event.target.value)
+  }
+
+  const updateConnection = (name: string, value: any) => {
+    props.managerActions.updateConnection(props.connection.id, {
+      [name]: value,
+    })
+  }
+
+  const renderProtocols = () => {
+    const { classes, connection } = props
+
+    const protocolItems = protocols.map((value: string) => (
+      <MenuItem key={value} value={value}>
+        {value}://
+      </MenuItem>
+    ))
+
+    return (
+      <TextField
+        select={true}
+        label="Protocol"
+        className={classes.textField}
+        value={connection.protocol}
+        onChange={updateProtocol}
+        margin="normal"
+      >
+        {protocolItems}
+      </TextField>
+    )
+  }
+
+  const updateProtocol = (event: React.ChangeEvent<HTMLInputElement>) => {
+    const value = event.target.value
+    updateConnection('protocol', value)
+    if (event.target.value === 'mqtt') {
+      updateConnection('basePath', undefined)
+    } else {
+      updateConnection('basePath', 'ws')
+    }
+  }
+
+  const toggleCertValidation = () => {
+    props.managerActions.updateConnection(props.connection.id, {
+      certValidation: !props.connection.certValidation,
+    })
+  }
+
+  const toggleTls = () => {
+    props.managerActions.updateConnection(props.connection.id, {
+      encryption: !props.connection.encryption,
+    })
+  }
+
+  function PasswordVisibilityButton(props: { showPassword: boolean; toggle: () => void }) {
+    return (
+      <InputAdornment position="end">
+        <IconButton aria-label="Toggle password visibility" onClick={props.toggle}>
+          {props.showPassword ? <Visibility /> : <VisibilityOff />}
+        </IconButton>
+      </InputAdornment>
+    )
+  }
+
+  const { classes, connection } = props
+
+  return (
+    <div>
+      <form className={classes.container} noValidate={true} autoComplete="off">
+        <Grid container={true} spacing={3}>
+          <Grid item={true} xs={5}>
+            <TextField
+              autoFocus={true}
+              label="Name"
+              className={classes.textField}
+              value={connection.name}
+              onChange={handleChange('name')}
+              margin="normal"
+            />
+          </Grid>
+          <Grid item={true} xs={4}>
+            <ToggleSwitch
+              label="Validate certificate"
+              classes={classes}
+              value={connection.certValidation}
+              toggle={toggleCertValidation}
+            />
+          </Grid>
+          <Grid item={true} xs={3}>
+            <ToggleSwitch label="Encryption (tls)" classes={classes} value={connection.encryption} toggle={toggleTls} />
+          </Grid>
+          <Grid item={true} xs={2}>
+            {renderProtocols()}
+          </Grid>
+          <Grid item={true} xs={7}>
+            <TextField
+              label="Host"
+              className={classes.textField}
+              value={connection.host}
+              onChange={handleChange('host')}
+              margin="normal"
+            />
+          </Grid>
+          <Grid item={true} xs={3}>
+            <TextField
+              label="Port"
+              className={classes.textField}
+              value={connection.port}
+              onChange={handleChange('port')}
+              margin="normal"
+            />
+          </Grid>
+          {requiresBasePath() ? renderBasePathInput() : null}
+          <Grid item={true} xs={requiresBasePath() ? 4 : 6}>
+            <TextField
+              label="Username"
+              className={classes.textField}
+              value={connection.username}
+              onChange={handleChange('username')}
+              margin="normal"
+            />
+          </Grid>
+          <Grid item={true} xs={requiresBasePath() ? 4 : 6}>
+            <FormControl className={`${classes.textField} ${classes.inputFormControl}`}>
+              <InputLabel htmlFor="adornment-password">Password</InputLabel>
+              <Input
+                id="adornment-password"
+                type={showPassword ? 'text' : 'password'}
+                value={connection.password}
+                onChange={handleChange('password')}
+                endAdornment={<PasswordVisibilityButton showPassword={showPassword} toggle={handleClickShowPassword} />}
+              />
+            </FormControl>
+          </Grid>
+        </Grid>
+        <br />
+        <div>
+          <div style={{ float: 'left' }}>
+            <Button
+              variant="contained"
+              className={classes.button}
+              onClick={() => props.managerActions.deleteConnection(props.connection.id)}
+            >
+              Delete <Delete />
+            </Button>
+            <Button
+              variant="contained"
+              className={classes.button}
+              onClick={props.managerActions.toggleAdvancedSettings}
+            >
+              <Settings /> Advanced
+            </Button>
+          </div>
+          <div style={{ float: 'right' }}>
+            <Button
+              variant="contained"
+              color="secondary"
+              className={classes.button}
+              onClick={props.managerActions.saveConnectionSettings}
+            >
+              <Save /> Save
+            </Button>
+            <ConnectButton toggle={toggleConnect} connecting={props.connecting} classes={classes} />
+          </div>
+        </div>
+      </form>
+    </div>
+  )
+}
+
+const mapStateToProps = (state: AppState) => {
+  return {
+    connected: state.connection.connected,
+    connecting: state.connection.connecting,
+  }
+}
+
+const mapDispatchToProps = (dispatch: any) => {
+  return {
+    actions: bindActionCreators(connectionActions, dispatch),
+    managerActions: bindActionCreators(connectionManagerActions, dispatch),
+  }
+}
+
+const styles = (theme: Theme) => ({
+  textField: {
+    width: '100%',
+  },
+  switch: {
+    marginTop: 0,
+  },
+  button: {
+    margin: theme.spacing(1),
+  },
+  inputFormControl: {
+    marginTop: '16px',
+  },
+})
+
+export default connect(
+  mapStateToProps,
+  mapDispatchToProps
+)(withStyles(styles)(ConnectionSettings))

app/src/components/ConnectionSetup/ConnectionSetup.tsx

@@ -0,0 +1,140 @@
+import * as React from 'react'
+import ConnectionSettings from './ConnectionSettings'
+import ProfileList from './ProfileList'
+import { AppState } from '../../reducers'
+import { bindActionCreators } from 'redux'
+import { connect } from 'react-redux'
+import { connectionManagerActions } from '../../actions'
+import { ConnectionOptions, toMqttConnection } from '../../model/ConnectionOptions'
+import { Theme, withStyles } from '@material-ui/core/styles'
+import { Modal, Paper, Toolbar, Typography, Collapse } from '@material-ui/core'
+import AdvancedConnectionSettings from './AdvancedConnectionSettings'
+import Certificates from './Certificates'
+
+interface Props {
+  actions: any
+  classes: any
+  connection?: ConnectionOptions
+  visible: boolean
+  showAdvancedSettings: boolean
+  showCertificateSettings: boolean
+}
+
+class ConnectionSetup extends React.Component<Props, {}> {
+  constructor(props: Props) {
+    super(props)
+  }
+
+  private renderSettings() {
+    const { connection, showAdvancedSettings, showCertificateSettings } = this.props
+    if (!connection) {
+      return null
+    }
+
+    return (
+      <div>
+        <Collapse in={!showAdvancedSettings && !showCertificateSettings}>
+          <ConnectionSettings connection={connection} />
+        </Collapse>
+        <Collapse in={showAdvancedSettings && !showCertificateSettings}>
+          <AdvancedConnectionSettings connection={connection} />
+        </Collapse>
+        <Collapse in={showCertificateSettings}>
+          <Certificates connection={connection} />
+        </Collapse>
+      </div>
+    )
+  }
+
+  public componentDidMount() {
+    this.props.actions.loadConnectionSettings()
+  }
+
+  public render() {
+    const { classes, visible, connection } = this.props
+    const mqttConnection = connection && toMqttConnection(connection)
+    return (
+      <div>
+        <Modal open={visible} disableAutoFocus={true}>
+          <Paper className={classes.root}>
+            <div className={classes.left}>
+              <ProfileList />
+            </div>
+            <div className={classes.right} key={connection && connection.id}>
+              <Toolbar>
+                <Typography className={classes.title} variant="h6" color="inherit">
+                  MQTT Connection
+                </Typography>
+                <Typography className={classes.connectionUri}>{mqttConnection && mqttConnection.url}</Typography>
+              </Toolbar>
+              {this.renderSettings()}
+            </div>
+          </Paper>
+        </Modal>
+      </div>
+    )
+  }
+}
+
+const connectionHeight = '440px'
+const styles = (theme: Theme) => ({
+  title: {
+    color: theme.palette.text.primary,
+    whiteSpace: 'nowrap' as 'nowrap',
+  },
+  root: {
+    margin: `calc((100vh - ${connectionHeight}) / 2) auto 0 auto`,
+    minWidth: '800px',
+    maxWidth: '850px',
+    height: connectionHeight,
+    outline: 'none' as 'none',
+    display: 'flex' as 'flex',
+  },
+  left: {
+    borderRightStyle: 'dotted' as 'dotted',
+    borderRadius: `${theme.shape.borderRadius}px 0 0 ${theme.shape.borderRadius}px`,
+    paddingTop: theme.spacing(2),
+    flex: 3,
+    overflow: 'hidden' as 'hidden',
+    backgroundColor: theme.palette.background.default,
+    color: theme.palette.text.primary,
+    overflowY: 'auto' as 'auto',
+  },
+  right: {
+    borderRadius: `0 ${theme.shape.borderRadius}px ${theme.shape.borderRadius}px 0`,
+    backgroundColor: theme.palette.background.paper,
+    padding: theme.spacing(2),
+    flex: 10,
+  },
+  connectionUri: {
+    width: '27em',
+    textOverflow: 'ellipsis' as 'ellipsis',
+    whiteSpace: 'nowrap' as 'nowrap',
+    overflow: 'hidden' as 'hidden',
+    color: theme.palette.text.hint,
+    fontSize: '0.9em',
+    marginLeft: theme.spacing(4),
+  },
+})
+
+const mapStateToProps = (state: AppState) => {
+  return {
+    visible: !state.connection.connected,
+    showAdvancedSettings: state.connectionManager.showAdvancedSettings,
+    showCertificateSettings: state.connectionManager.showCertificateSettings,
+    connection: state.connectionManager.selected
+      ? state.connectionManager.connections[state.connectionManager.selected]
+      : undefined,
+  }
+}
+
+const mapDispatchToProps = (dispatch: any) => {
+  return {
+    actions: bindActionCreators(connectionManagerActions, dispatch),
+  }
+}
+
+export default connect(
+  mapStateToProps,
+  mapDispatchToProps
+)(withStyles(styles)(ConnectionSetup))

app/src/components/ConnectionSetup/Notification.tsx

@@ -1,57 +0,0 @@
-import * as React from 'react'
-import { Snackbar, SnackbarContent } from '@material-ui/core'
-import { red, green } from '@material-ui/core/colors'
-import { withStyles, Theme } from '@material-ui/core/styles'
-
-enum MessageType {
-  success = 'success',
-  error = 'error',
-}
-
-interface Props {
-  message: string
-  type: MessageType
-  onClose: () => void
-  classes: any
-}
-
-interface State {
-  snackBarOpen: boolean
-}
-
-class Notification extends React.Component<Props, State> {
-  constructor(props: Props) {
-    super(props)
-    this.state = { snackBarOpen: false }
-  }
-
-  public static styles = (theme: Theme) => ({
-    success: {
-      backgroundColor: green[600],
-      color: theme.typography.button.color,
-    },
-    error: {
-      backgroundColor: red[600],
-      color: theme.typography.button.color,
-    },
-  })
-
-  public render() {
-    return <Snackbar
-      anchorOrigin={{
-        vertical: 'bottom',
-        horizontal: 'left',
-      }}
-      open={this.state.snackBarOpen}
-      autoHideDuration={6000}
-      onClose={() => { this.setState({ snackBarOpen: false }) }}
-    >
-      <SnackbarContent
-        className={this.props.classes[this.props.type]}
-        message={this.props.message}
-      />
-    </Snackbar>
-  }
-}
-
-export default withStyles(Notification.styles)(Notification)

app/src/components/ConnectionSetup/ProfileList/AddButton.tsx

@@ -0,0 +1,25 @@
+import * as React from 'react'
+import Add from '@material-ui/icons/Add'
+import { Fab } from '@material-ui/core'
+import { Theme, withStyles } from '@material-ui/core/styles'
+
+const styles = (theme: Theme) => ({
+  addButton: {
+    height: theme.spacing(4),
+    width: theme.spacing(4),
+    minHeight: '0',
+  },
+  addIcon: {
+    height: theme.spacing(2),
+  },
+})
+
+export const AddButton = withStyles(styles)((props: { classes: any; action: any }) => {
+  return (
+    <span id="addProfileButton" style={{ marginRight: '12px' }}>
+      <Fab size="small" color="secondary" aria-label="Add" className={props.classes.addButton} onClick={props.action}>
+        <Add className={props.classes.addIcon} />
+      </Fab>
+    </span>
+  )
+})

app/src/components/ConnectionSetup/ProfileList/ConnectionItem.tsx

@@ -0,0 +1,57 @@
+import React from 'react'
+import { connect } from 'react-redux'
+import { ListItem, Typography } from '@material-ui/core'
+import { toMqttConnection, ConnectionOptions } from '../../../model/ConnectionOptions'
+import { withStyles, Theme } from '@material-ui/core/styles'
+import { bindActionCreators } from 'redux'
+import { connectionManagerActions } from '../../../actions'
+
+export interface Props {
+  connection: ConnectionOptions
+  actions: any
+  selected: boolean
+  classes: any
+}
+
+const ConnectionItem = (props: Props) => {
+  const connection = props.connection.host && toMqttConnection(props.connection)
+  return (
+    <ListItem
+      button={true}
+      selected={props.selected}
+      style={{ display: 'block' }}
+      onClick={() => props.actions.selectConnection(props.connection.id)}
+    >
+      <Typography className={props.classes.name}>{props.connection.name || 'mqtt broker'}</Typography>
+      <Typography className={props.classes.details}>{connection && connection.url}</Typography>
+    </ListItem>
+  )
+}
+
+export const mapDispatchToProps = (dispatch: any) => {
+  return {
+    actions: bindActionCreators(connectionManagerActions, dispatch),
+  }
+}
+
+export const connectionItemStyle = (theme: Theme) => ({
+  name: {
+    width: '100%',
+    textOverflow: 'ellipsis' as 'ellipsis',
+    whiteSpace: 'nowrap' as 'nowrap',
+    overflow: 'hidden' as 'hidden',
+  },
+  details: {
+    width: '100%',
+    textOverflow: 'ellipsis' as 'ellipsis',
+    whiteSpace: 'nowrap' as 'nowrap',
+    overflow: 'hidden' as 'hidden',
+    color: theme.palette.text.hint,
+    fontSize: '0.7em',
+  },
+})
+
+export default connect(
+  null,
+  mapDispatchToProps
+)(withStyles(connectionItemStyle)(ConnectionItem))

app/src/components/ConnectionSetup/ProfileList/index.tsx

@@ -0,0 +1,83 @@
+import ConnectionItem from './ConnectionItem'
+import React from 'react'
+import { AddButton } from './AddButton'
+import { AppState } from '../../../reducers'
+import { bindActionCreators } from 'redux'
+import { connect } from 'react-redux'
+import { connectionManagerActions } from '../../../actions'
+import { ConnectionOptions } from '../../../model/ConnectionOptions'
+import { KeyCodes } from '../../../utils/KeyCodes'
+import { List, ListSubheader } from '@material-ui/core'
+import { Theme, withStyles } from '@material-ui/core/styles'
+import { useGlobalKeyEventHandler } from '../../../effects/useGlobalKeyEventHandler'
+
+interface Props {
+  classes: any
+  selected?: string
+  connections: { [s: string]: ConnectionOptions }
+  actions: typeof connectionManagerActions
+}
+
+function ProfileList(props: Props) {
+  const { actions, classes, connections, selected } = props
+
+  const selectConnection = (dir: 'next' | 'previous') => (event: KeyboardEvent) => {
+    if (!selected) {
+      return
+    }
+    const indexDirection = dir === 'next' ? 1 : -1
+    const connectionArray = Object.values(connections)
+    const selectedIndex = connectionArray.map(connection => connection.id).indexOf(selected)
+    const nextConnection = connectionArray[selectedIndex + indexDirection]
+    if (nextConnection) {
+      actions.selectConnection(nextConnection.id)
+    }
+    event.preventDefault()
+  }
+
+  useGlobalKeyEventHandler(KeyCodes.arrow_down, selectConnection('next'))
+  useGlobalKeyEventHandler(KeyCodes.arrow_up, selectConnection('previous'))
+
+  const createConnectionButton = (
+    <div style={{ padding: '8px 16px' }}>
+      <AddButton action={actions.createConnection} />
+      Connections
+    </div>
+  )
+
+  return (
+    <List style={{ height: '100%' }} component="nav" subheader={createConnectionButton}>
+      <div className={classes.list}>
+        {Object.values(connections).map(connection => (
+          <ConnectionItem connection={connection} key={connection.id} selected={selected === connection.id} />
+        ))}
+      </div>
+    </List>
+  )
+}
+
+const styles = (theme: Theme) => ({
+  list: {
+    marginTop: theme.spacing(1),
+    height: `calc(100% - ${theme.spacing(6)})`,
+    overflowY: 'auto' as 'auto',
+  },
+})
+
+const mapDispatchToProps = (dispatch: any) => {
+  return {
+    actions: bindActionCreators(connectionManagerActions, dispatch),
+  }
+}
+
+const mapStateToProps = (state: AppState) => {
+  return {
+    connections: state.connectionManager.connections,
+    selected: state.connectionManager.selected,
+  }
+}
+
+export default connect(
+  mapStateToProps,
+  mapDispatchToProps
+)(withStyles(styles)(ProfileList))

app/src/components/ConnectionSetup/ToggleSwitch.tsx

@@ -0,0 +1,12 @@
+import React from 'react'
+import { FormControlLabel, Switch } from '@material-ui/core'
+
+export function ToggleSwitch(props: { value: boolean; classes: any; toggle: () => void; label: string }) {
+  const { classes, value, toggle, label } = props
+  const toggleSwitch = <Switch checked={value} onChange={toggle} color="primary" />
+  return (
+    <div className={classes.switch}>
+      <FormControlLabel control={toggleSwitch} label={label} labelPlacement="bottom" />
+    </div>
+  )
+}

app/src/components/Copy.tsx

@@ -1,70 +0,0 @@
-import * as React from 'react'
-import { Snackbar, SnackbarContent } from '@material-ui/core'
-import FileCopy from '@material-ui/icons/FileCopy'
-import Check from '@material-ui/icons/Check'
-import green from '@material-ui/core/colors/green'
-import { withStyles, Theme } from '@material-ui/core/styles'
-
-const copy = require('copy-text-to-clipboard')
-
-interface Props {
-  value: string
-  classes: any
-}
-
-interface State {
-  didCopy: boolean
-  snackBarOpen: boolean
-}
-
-const styles = (theme: Theme) => ({
-  snackbar: {
-    backgroundColor: green[600],
-    color: theme.typography.button.color,
-  },
-})
-
-class Copy extends React.Component<Props, State> {
-  constructor(props: Props) {
-    super(props)
-    this.state = { didCopy: false, snackBarOpen: false }
-  }
-
-  public render() {
-    const icon = !this.state.didCopy
-      ? <FileCopy fontSize="inherit" style={{ cursor: 'pointer' }} onClick={this.handleClick} />
-      : <Check fontSize="inherit" style={{ cursor: 'default' }} />
-
-    return <span>
-      <span style={{ fontSize: '16px' }}>{icon}</span>
-      <span>
-        <Snackbar
-          anchorOrigin={{
-            vertical: 'bottom',
-            horizontal: 'left',
-          }}
-          open={this.state.snackBarOpen}
-          autoHideDuration={2000}
-          onClose={() => { this.setState({ snackBarOpen: false }) }}
-        >
-          <SnackbarContent
-            className={this.props.classes.snackbar}
-            message="Copied to clipboard"
-          />
-        </Snackbar>
-      </span>
-    </span>
-  }
-
-  private handleClick = (event: React.MouseEvent) => {
-    event.stopPropagation()
-
-    copy(this.props.value)
-    this.setState({ didCopy: true, snackBarOpen: true })
-    setTimeout(() => {
-      this.setState({ didCopy: false })
-    }, 1500)
-  }
-}
-
-export default withStyles(styles)(Copy)

app/src/components/Demo/Key.tsx

@@ -0,0 +1,43 @@
+import * as React from 'react'
+import { Theme, withStyles } from '@material-ui/core'
+
+interface Props {
+  keyboardKey: string
+  classes: any
+}
+
+class Key extends React.Component<Props, {}> {
+  constructor(props: any) {
+    super(props)
+    this.state = { location: 'bottom' }
+  }
+
+  public render() {
+    return (
+      <div className={this.props.classes.keyStyle}>
+        <div className={this.props.classes.keyTextStyle}>{this.props.keyboardKey}</div>
+      </div>
+    )
+  }
+}
+
+const style = (theme: Theme) => ({
+  keyStyle: {
+    display: 'inline-block' as 'inline-block',
+    width: '1em',
+    height: '1em',
+    backgroundColor: '#bbb',
+    borderRadius: '10%',
+    verticalAlign: 'middle' as 'middle',
+    textAlign: 'center' as 'center',
+    textShadow: '1px 1px rgba(255,255,255,0.45)',
+    boxShadow: '0.08em 0.15em 0.01em 0px rgba(100,100,100,0.75)',
+  },
+  keyTextStyle: {
+    marginTop: '0.65em',
+    fontSize: '0.4em',
+    fontWeight: 'bold' as 'bold',
+  },
+})
+
+export default withStyles(style)(Key)

app/src/components/Demo/Mouse.tsx

@@ -0,0 +1,82 @@
+import * as React from 'react'
+import { Theme, withStyles } from '@material-ui/core'
+const cursor = require('./cursor.png')
+
+interface State {
+  enabled: boolean
+  target: { x: number; y: number }
+  position: { x: number; y: number }
+  stepSizeX: number
+  stepSizeY: number
+}
+
+class Demo extends React.Component<{ classes: any }, State> {
+  private timer: any
+  private frameInterval = 20
+
+  constructor(props: any) {
+    super(props)
+    this.state = { enabled: false, target: { x: 0, y: 0 }, position: { x: 0, y: 0 }, stepSizeX: 1, stepSizeY: 1 }
+  }
+
+  private moveCloser(steps: number = 0) {
+    const steSizeX = Math.min(this.state.stepSizeX, Math.abs(this.state.position.x - this.state.target.x))
+    const steSizeY = Math.min(this.state.stepSizeY, Math.abs(this.state.position.y - this.state.target.y))
+    const dirX = this.state.position.x > this.state.target.x ? -1 : 1
+    const dirY = this.state.position.y > this.state.target.y ? -1 : 1
+
+    if (steSizeX <= 0.1 && steSizeY <= 0.1) {
+      this.timer && clearTimeout(this.timer)
+      return
+    }
+
+    this.setState({
+      position: {
+        x: this.state.position.x + dirX * steSizeX,
+        y: this.state.position.y + dirY * steSizeY,
+      },
+    })
+
+    this.timer = setTimeout(() => {
+      this.moveCloser(steps + 1)
+    }, this.frameInterval)
+  }
+
+  public componentDidMount() {
+    ;(window as any).demo.enableMouse = () => {
+      this.setState({ enabled: true })
+    }
+    ;(window as any).demo.moveMouse = (x: number, y: number, animationTime: number) => {
+      const stepSizeX = Math.abs(this.state.position.x - x) / (animationTime / this.frameInterval)
+      const stepSizeY = Math.abs(this.state.position.y - y) / (animationTime / this.frameInterval)
+      this.setState({ stepSizeX, stepSizeY, enabled: true, target: { x, y } })
+      this.moveCloser()
+    }
+  }
+
+  public render() {
+    if (!this.state.enabled) {
+      return null
+    }
+
+    const cursorStyle = {
+      left: this.state.position.x + 2,
+      top: this.state.position.y + 2,
+    }
+
+    return <img src={cursor} style={cursorStyle} className={this.props.classes.cursor} />
+  }
+}
+
+const style = (theme: Theme) => ({
+  cursor: {
+    width: '32px',
+    height: '32px',
+    position: 'fixed' as 'fixed',
+    zIndex: 1000000,
+    filter: theme.palette.type === 'light' ? undefined : 'invert(100%)',
+    pointerEvents: 'none' as 'none',
+  },
+})
+
+export default withStyles(style)(Demo)

app/src/components/Demo/ShowText.tsx

@@ -0,0 +1,93 @@
+import * as React from 'react'
+import { Theme, withStyles } from '@material-ui/core'
+import Key from './Key'
+
+interface State {
+  message?: string
+  keys: Array<string>
+  location: string
+}
+
+class Demo extends React.Component<{ classes: any }, State> {
+  private timer: any
+  constructor(props: any) {
+    super(props)
+    this.state = { location: 'bottom', keys: [] }
+  }
+
+  private clearTimer() {
+    this.timer && clearTimeout(this.timer)
+  }
+
+  public componentDidMount() {
+    ;(window as any).demo.showMessage = (
+      message: string,
+      location: string,
+      duration: number,
+      keys: Array<string> = []
+    ) => {
+      this.clearTimer()
+      this.setState({ message, location, keys })
+      this.timer = setTimeout(() => this.setState({ message: undefined }), duration)
+    }
+    ;(window as any).demo.hideMessage = () => {
+      this.clearTimer()
+      this.setState({ message: undefined })
+    }
+  }
+
+  public render() {
+    const positions: { [s: string]: number } = {
+      top: 0,
+      bottom: -65,
+      middle: -32,
+    }
+    const style = {
+      position: 'fixed' as 'fixed',
+      left: '5vw',
+      zIndex: 1000000,
+      margin: '30vw auto 50vw',
+      right: '5vw',
+      bottom: `${positions[this.state.location]}vh`,
+    }
+    const style2 = {
+      textAlign: 'center' as 'center',
+      fontSize: '4em',
+      color: 'white',
+      backgroundColor: 'rgba(0, 0, 0, 0.8)',
+      borderRadius: '16px',
+    }
+
+    if (!this.state.message) {
+      return null
+    }
+
+    let keys: Array<any> = []
+    if (this.state.keys.length > 0) {
+      keys = this.state.keys
+        .map(key => [<Key key={key} keyboardKey={key} />])
+        .reduce((prev, current) => {
+          return [prev, '+' as any, current]
+        })
+    }
+
+    return (
+      <div style={style}>
+        <div style={style2}>
+          <span>{this.state.message}</span>
+          {keys.length > 0 ? <div className={this.props.classes.keysStyle}>{keys}</div> : null}
+        </div>
+      </div>
+    )
+  }
+}
+
+const style = (theme: Theme) => ({
+  keysStyle: {
+    fontSize: '1em',
+    display: 'inline-block' as 'inline-block',
+    transform: 'translateY(0.3em) translateX(0.8em)',
+  },
+})
+
+export default withStyles(style)(Demo)

app/src/components/Demo/index.tsx

@@ -0,0 +1,26 @@
+import * as React from 'react'
+import ShowText from './ShowText'
+import Mouse from './Mouse'
+let heapdump: any
+
+function writeHeapdump(path?: string) {
+  if (!heapdump) {
+    heapdump = require('heapdump')
+  }
+
+  heapdump.writeSnapshot(path || `${Date.now()}.heapsnapshot`)
+  return path
+}
+
+;(window as any).demo = {
+  writeHeapdump,
+}
+
+export default function render(props: any) {
+  return (
+    <span>
+      <ShowText />
+      <Mouse />
+    </span>
+  )
+}

app/src/components/ErrorBoundary.tsx

@@ -0,0 +1,118 @@
+import * as React from 'react'
+import PersistentStorage from '../utils/PersistentStorage'
+import SentimentDissatisfied from '@material-ui/icons/SentimentDissatisfied'
+import Warning from '@material-ui/icons/Warning'
+import { electronRendererTelemetry } from 'electron-telemetry'
+import { Theme, withStyles } from '@material-ui/core/styles'
+import { Button, Modal, Paper, Toolbar, Typography } from '@material-ui/core'
+
+interface State {
+  error?: Error
+}
+
+interface Props {
+  classes: any
+}
+
+class ErrorBoundary extends React.Component<Props, State> {
+  public static getDerivedStateFromError(error: Error) {
+    return { error }
+  }
+  constructor(props: Props) {
+    super(props)
+    this.state = {}
+  }
+
+  private restart = () => {
+    window.location = window.location
+  }
+
+  private clearStorage = () => {
+    PersistentStorage.clear()
+    window.location = window.location
+  }
+
+  public componentDidCatch(error: Error, errorInfo: any) {
+    electronRendererTelemetry.trackError(error)
+    console.log('did catch', error)
+  }
+
+  public render() {
+    if (!this.state.error) {
+      return this.props.children
+    }
+
+    const { classes } = this.props
+    return (
+      <Modal open={true} disableAutoFocus={true}>
+        <Paper className={classes.root}>
+          <Toolbar style={{ padding: '0' }}>
+            <Typography className={classes.title} variant="h6" color="inherit">
+              <Warning /> Oooooops!
+            </Typography>
+          </Toolbar>
+          <Typography className={classes.centered}>
+            I hoped that you would never see this window, but MQTT-Explorer had an unexpected error.
+          </Typography>
+          <Typography className={classes.centered}>
+            <SentimentDissatisfied />
+          </Typography>
+          <pre className={classes.textColor} style={{ maxHeight: '35vh', overflow: 'scroll' }}>
+            <code className={classes.textColor}>{this.state.error.stack}</code>
+          </pre>
+          <Typography>
+            Please report this issue with a short description of what happened to
+            <span>
+              {' '}
+              <a className={classes.textColor} href="https://github.com/thomasnordquist/MQTT-Explorer/issues">
+                https://github.com/thomasnordquist/MQTT-Explorer/issues
+              </a>
+            </span>
+          </Typography>
+          <div>
+            <div className={classes.buttonPositioning}>
+              <Button className={classes.button} variant="contained" color="secondary" onClick={this.clearStorage}>
+                Start Fresh
+              </Button>
+              <Button className={classes.button} variant="contained" color="primary" onClick={this.restart}>
+                Restart
+              </Button>
+            </div>
+          </div>
+        </Paper>
+      </Modal>
+    )
+  }
+}
+
+const styles = (theme: Theme) => ({
+  button: {
+    margin: '0 8px 0 8px',
+  },
+  root: {
+    minWidth: 550,
+    maxWidth: 650,
+    backgroundColor: theme.palette.background.default,
+    margin: '10vh auto auto auto',
+    padding: theme.spacing(2),
+    outline: 'none',
+  },
+  title: {
+    color: theme.palette.text.primary,
+    margin: '0',
+    textAlign: 'center' as 'center',
+  },
+  textColor: {
+    color: theme.palette.text.primary,
+    userSelect: 'all' as 'all',
+  },
+  centered: {
+    textAlign: 'center' as 'center',
+  },
+  buttonPositioning: {
+    textAlign: 'center' as 'center',
+    marginTop: theme.spacing(2),
+  },
+})
+
+export default withStyles(styles)(ErrorBoundary)

app/src/components/Layout/ContentView.tsx

@@ -0,0 +1,116 @@
+import * as React from 'react'
+import ChartPanel from '../ChartPanel'
+import ReactSplitPane from 'react-split-pane'
+import Tree from '../Tree'
+import { AppState } from '../../reducers'
+import { ChartParameters } from '../../reducers/Charts'
+import { connect } from 'react-redux'
+import { List } from 'immutable'
+import { Sidebar } from '../Sidebar'
+import ReactResizeDetector from 'react-resize-detector'
+
+interface Props {
+  heightProperty: any
+  paneDefaults: any
+  connectionId?: string
+  chartPanelItems: List<ChartParameters>
+}
+
+function ContentView(props: Props) {
+  const [height, setHeight] = React.useState<string | number>('100%')
+  const [sidebarWidth, setSidebarWidth] = React.useState<string | number>('40%')
+  const [detectedHeight, setDetectedHeight] = React.useState(0)
+  const [detectedSidebarWidth, setDetectedSidebarWidth] = React.useState(0)
+  const detectSize = React.useCallback((width, newHeight) => {
+    setDetectedHeight(newHeight)
+  }, [])
+
+  const detectSidebarSize = React.useCallback(width => {
+    setDetectedSidebarWidth(width)
+  }, [])
+
+  const closeDrawerCompletelyIfItSitsOnTheEdge = React.useCallback(() => {
+    if (detectedHeight < 30) {
+      setHeight('100%')
+    }
+  }, [detectedHeight])
+
+  const closeSidebarCompletelyIfItSitsOnTheEdge = React.useCallback(() => {
+    if (detectedSidebarWidth < 30) {
+      setSidebarWidth('0%')
+    }
+  }, [detectedSidebarWidth])
+
+  // Open chart panel on start and when a new chart is added but the panel is closed
+  React.useEffect(() => {
+    const almostClosed = !isNaN(height as any) && detectedHeight < 30
+    if ((!height || height === '100%' || almostClosed) && props.chartPanelItems.count() > 0) {
+      setHeight('calc(100% - 250px)')
+    }
+
+    if (props.chartPanelItems.count() === 0) {
+      setHeight('100%')
+    }
+  }, [props.chartPanelItems])
+
+  return (
+    <div className={props.paneDefaults}>
+      <span>
+        <ReactSplitPane
+          step={20}
+          primary="second"
+          className={props.heightProperty}
+          split="vertical"
+          minSize={0}
+          size={sidebarWidth}
+          onChange={setSidebarWidth}
+          onDragFinished={closeSidebarCompletelyIfItSitsOnTheEdge}
+          allowResize={true}
+          style={{ height: '100%' }}
+          pane1Style={{ overflowX: 'hidden' }}
+          resizerStyle={{ height: '100%' }}
+        >
+          <span>
+            <ReactSplitPane
+              step={10}
+              split="horizontal"
+              minSize={0}
+              size={height}
+              allowResize={true}
+              style={{ height: 'calc(100vh - 64px)' }}
+              pane1Style={{ maxHeight: '100%' }}
+              pane2Style={{ borderTop: '1px solid #999', display: 'flex' }}
+              onChange={setHeight}
+              onDragFinished={closeDrawerCompletelyIfItSitsOnTheEdge}
+            >
+              <Tree />
+              {/** Passing height constraints via flex options down */}
+              <div style={{ flex: 1, display: 'flex', height: '100%', width: '100%' }}>
+                {/** Resize detector must not be in the scroll zone, it needs to detect actual available size */}
+                <ReactResizeDetector handleHeight={true} onResize={detectSize} />
+                <ChartPanel />
+              </div>
+            </ReactSplitPane>
+          </span>
+          <div style={{ height: '100%' }}>
+            <ReactResizeDetector handleWidth={true} onResize={detectSidebarSize} />
+            <div
+              className={props.paneDefaults}
+              style={{ minWidth: '250px', height: '100%', overflowY: 'auto', overflowX: 'hidden' }}
+            >
+              <Sidebar connectionId={props.connectionId} />
+            </div>
+          </div>
+        </ReactSplitPane>
+      </span>
+    </div>
+  )
+}
+
+const mapStateToProps = (state: AppState) => {
+  return {
+    chartPanelItems: state.charts.get('charts'),
+  }
+}
+
+export default connect(mapStateToProps)(ContentView)

app/src/components/Layout/Notification.tsx

@@ -0,0 +1,52 @@
+import * as React from 'react'
+
+import { Snackbar, SnackbarContent } from '@material-ui/core'
+import { Theme, withStyles } from '@material-ui/core/styles'
+import { green, red } from '@material-ui/core/colors'
+
+interface Props {
+  message?: string
+  type: 'error' | 'notification'
+  onClose: () => void
+  classes: any
+}
+
+class Notification extends React.Component<Props, {}> {
+  constructor(props: Props) {
+    super(props)
+  }
+
+  public static styles = (theme: Theme) => ({
+    notification: {
+      backgroundColor: green[600],
+      color: theme.typography.button.color,
+    },
+    error: {
+      backgroundColor: theme.palette.error.main,
+      color: theme.typography.button.color,
+    },
+  })
+
+  public render() {
+    const snackbarAnchor = {
+      vertical: 'bottom' as 'bottom',
+      horizontal: 'left' as 'left',
+    }
+
+    return (
+      <Snackbar
+        anchorOrigin={snackbarAnchor}
+        open={Boolean(this.props.message)}
+        autoHideDuration={this.props.type === 'error' ? 10000 : 2000}
+        onClose={this.props.onClose}
+      >
+        <SnackbarContent
+          className={this.props.type === 'error' ? this.props.classes.error : this.props.classes.notification}
+          message={this.props.message}
+        />
+      </Snackbar>
+    )
+  }
+}
+
+export default withStyles(Notification.styles)(Notification)

app/src/components/Layout/PauseButton.tsx

@@ -0,0 +1,108 @@
+import * as React from 'react'
+import * as q from '../../../../backend/src/Model'
+import CustomIconButton from '../helper/CustomIconButton'
+import Pause from '@material-ui/icons/PauseCircleFilled'
+import Resume from '@material-ui/icons/PlayArrow'
+import { AppState } from '../../reducers'
+import { bindActionCreators } from 'redux'
+import { connect } from 'react-redux'
+import { treeActions } from '../../actions'
+import { withStyles, Theme } from '@material-ui/core/styles'
+
+const styles = (theme: Theme) => ({
+  icon: {
+    color: theme.palette.primary.contrastText,
+    verticalAlign: 'middle' as 'middle',
+  },
+  bufferStats: {
+    minWidth: '8em',
+  },
+})
+
+interface Props {
+  classes: any
+  actions: {
+    tree: typeof treeActions
+  }
+  paused: boolean
+  tree?: q.Tree<any>
+}
+
+class PauseButton extends React.Component<Props, { changes: number }> {
+  private timer?: any
+  constructor(props: Props) {
+    super(props)
+    this.state = { changes: 0 }
+  }
+
+  private renderBufferStats() {
+    if (!this.props.tree) {
+      return
+    }
+
+    return (
+      <span className={this.props.classes.bufferStats}>
+        {this.state.changes} changes
+        <br />
+        buffer at {Math.round(this.props.tree.unmergedChanges().fillState() * 10000) / 100}%
+      </span>
+    )
+  }
+
+  public componentDidMount() {
+    this.timer = setInterval(() => {
+      if (!this.props.paused || !this.props.tree) {
+        return
+      }
+
+      const changes = this.props.tree.unmergedChanges()
+      if (this.state.changes !== changes.length) {
+        this.setState({ changes: changes.length })
+      }
+    }, 300)
+  }
+
+  public componentWillUnmount() {
+    this.timer && clearInterval(this.timer)
+  }
+
+  public render() {
+    const message = this.props.paused
+      ? 'Resumes updating the tree, after applying all recorded changes'
+      : 'Stops all updates, records changes until the buffer is full.'
+    return (
+      <div style={{ display: 'inline-flex' }}>
+        <span>
+          <CustomIconButton onClick={this.props.actions.tree.togglePause} tooltip={message}>
+            {this.props.paused ? (
+              <Resume className={this.props.classes.icon} />
+            ) : (
+              <Pause className={this.props.classes.icon} />
+            )}
+          </CustomIconButton>
+        </span>
+        {this.props.paused ? this.renderBufferStats() : null}
+      </div>
+    )
+  }
+}
+
+const mapStateToProps = (state: AppState) => {
+  return {
+    paused: state.tree.get('paused'),
+    tree: state.tree.get('tree'),
+  }
+}
+
+const mapDispatchToProps = (dispatch: any) => {
+  return {
+    actions: {
+      tree: bindActionCreators(treeActions, dispatch),
+    },
+  }
+}
+
+export default connect(
+  mapStateToProps,
+  mapDispatchToProps
+)(withStyles(styles)(PauseButton))

app/src/components/Layout/SearchBar.tsx

@@ -0,0 +1,146 @@
+import React, { useCallback, useState, useRef } from 'react'
+import ClearAdornment from '../helper/ClearAdornment'
+import Search from '@material-ui/icons/Search'
+import { AppState } from '../../reducers'
+import { bindActionCreators } from 'redux'
+import { connect } from 'react-redux'
+import { InputBase } from '@material-ui/core'
+import { settingsActions } from '../../actions'
+import { fade, Theme, withStyles } from '@material-ui/core/styles'
+import { useGlobalKeyEventHandler } from '../../effects/useGlobalKeyEventHandler'
+import { KeyCodes } from '../../utils/KeyCodes'
+
+function SearchBar(props: {
+  classes: any
+  topicFilter?: string
+  hasConnection: boolean
+  actions: {
+    settings: typeof settingsActions
+  }
+}) {
+  const { actions, classes, hasConnection, topicFilter } = props
+
+  const [hasFocus, setHasFocus] = useState(false)
+  const inputRef = useRef<HTMLInputElement>()
+  const onFocus = useCallback(() => setHasFocus(true), [])
+  const onBlur = useCallback(() => setHasFocus(false), [])
+
+  const clearFilter = useCallback(() => {
+    actions.settings.filterTopics('')
+  }, [])
+
+  const onFilterChange = useCallback((event: React.ChangeEvent<HTMLInputElement>) => {
+    actions.settings.filterTopics(event.target.value)
+  }, [])
+
+  useGlobalKeyEventHandler(undefined, event => {
+    const isCharacter = event.key.length === 1
+    const isAllowedControlCharacter = event.keyCode === KeyCodes.backspace || event.keyCode === KeyCodes.delete
+    const tagNameBlacklist = ['INPUT', 'TEXTAREA', 'RADIO', 'CHECKBOX', 'OPTION', 'FORM']
+
+    const tagElementIsNotBlacklisted =
+      document.activeElement && tagNameBlacklist.indexOf(document.activeElement.tagName) === -1
+
+    if (
+      (isCharacter || isAllowedControlCharacter) &&
+      !event.defaultPrevented &&
+      !hasFocus &&
+      tagElementIsNotBlacklisted &&
+      hasConnection
+    ) {
+      // Focus input field, no preventDefault the event will reach the input element after it has been focussed
+      inputRef.current && inputRef.current.focus()
+    }
+  })
+
+  return (
+    <div className={classes.search}>
+      <div className={classes.searchIcon}>
+        <Search />
+      </div>
+      <InputBase
+        value={topicFilter}
+        inputProps={{
+          onFocus,
+          onBlur,
+          ref: inputRef,
+        }}
+        onChange={onFilterChange}
+        placeholder="Search…"
+        endAdornment={
+          <div style={{ width: '24px', paddingRight: '8px' }}>
+            <ClearAdornment variant="primary" action={clearFilter} value={topicFilter} />
+          </div>
+        }
+        classes={{ root: classes.inputRoot, input: classes.inputInput }}
+      />
+    </div>
+  )
+}
+
+const mapStateToProps = (state: AppState) => {
+  return {
+    topicFilter: state.settings.get('topicFilter'),
+    hasConnection: Boolean(state.connection.connectionId),
+  }
+}
+
+const mapDispatchToProps = (dispatch: any) => {
+  return {
+    actions: {
+      settings: bindActionCreators(settingsActions, dispatch),
+    },
+  }
+}
+
+const styles = (theme: Theme) => ({
+  search: {
+    position: 'relative' as 'relative',
+    borderRadius: theme.shape.borderRadius,
+    backgroundColor: fade(theme.palette.common.white, 0.15),
+    '&:hover': {
+      backgroundColor: fade(theme.palette.common.white, 0.25),
+    },
+    marginRight: theme.spacing(2),
+    marginLeft: 0,
+    flexGrow: 1,
+    maxWidth: '60%',
+
+    [theme.breakpoints.up('md')]: {
+      maxWidth: '30%',
+
+      marginLeft: theme.spacing(4),
+      width: 'auto' as 'auto',
+    },
+    [theme.breakpoints.up(750)]: {
+      marginLeft: theme.spacing(4),
+      width: 'auto' as 'auto',
+    },
+  },
+  searchIcon: {
+    width: theme.spacing(6),
+    height: '100%',
+    position: 'absolute' as 'absolute',
+    pointerEvents: 'none' as 'none',
+    display: 'flex' as 'flex',
+    alignItems: 'center' as 'center',
+    justifyContent: 'center' as 'center',
+  },
+  inputRoot: {
+    color: 'inherit' as 'inherit',
+    width: '100%',
+  },
+  inputInput: {
+    paddingTop: theme.spacing(1),
+    paddingRight: theme.spacing(1),
+    paddingBottom: theme.spacing(1),
+    paddingLeft: theme.spacing(6),
+    transition: theme.transitions.create('width'),
+    width: '100%',
+  },
+})
+
+export default connect(
+  mapStateToProps,
+  mapDispatchToProps
+)(withStyles(styles)(SearchBar))

app/src/components/Layout/TitleBar.tsx

@@ -0,0 +1,103 @@
+import * as React from 'react'
+import CloudOff from '@material-ui/icons/CloudOff'
+import ConnectionHealthIndicator from '../helper/ConnectionHealthIndicator'
+import Menu from '@material-ui/icons/Menu'
+import PauseButton from './PauseButton'
+import SearchBar from './SearchBar'
+import { AppBar, Button, IconButton, Toolbar, Typography } from '@material-ui/core'
+import { AppState } from '../../reducers'
+import { bindActionCreators } from 'redux'
+import { connect } from 'react-redux'
+import { connectionActions, globalActions, settingsActions } from '../../actions'
+import { Theme, withStyles } from '@material-ui/core/styles'
+
+const styles = (theme: Theme) => ({
+  title: {
+    display: 'none' as 'none',
+    [theme.breakpoints.up(750)]: {
+      display: 'block' as 'block',
+    },
+    whiteSpace: 'nowrap' as 'nowrap',
+  },
+  disconnectIcon: {
+    [theme.breakpoints.down('xs')]: {
+      display: 'none' as 'none',
+    },
+    marginRight: '8px',
+    paddingLeft: '8px',
+  },
+  menuButton: {
+    marginLeft: -12,
+    marginRight: 20,
+  },
+  disconnect: {
+    margin: 'auto 8px auto auto',
+    color: theme.palette.primary.contrastText,
+  },
+})
+
+interface Props {
+  classes: any
+  actions: {
+    settings: typeof settingsActions
+    connection: typeof connectionActions
+    global: typeof globalActions
+  }
+  topicFilter?: string
+}
+
+class TitleBar extends React.Component<Props, {}> {
+  constructor(props: any) {
+    super(props)
+    this.state = {}
+  }
+
+  public render() {
+    const { actions, classes } = this.props
+
+    return (
+      <AppBar position="static">
+        <Toolbar>
+          <IconButton
+            className={classes.menuButton}
+            color="inherit"
+            aria-label="Menu"
+            onClick={actions.global.toggleSettingsVisibility}
+          >
+            <Menu />
+          </IconButton>
+          <Typography className={classes.title} variant="h6" color="inherit">
+            MQTT Explorer
+          </Typography>
+          <SearchBar />
+          <PauseButton />
+          <Button className={classes.disconnect} onClick={actions.connection.disconnect}>
+            Disconnect <CloudOff className={classes.disconnectIcon} />
+          </Button>
+          <ConnectionHealthIndicator withBackground={true} />
+        </Toolbar>
+      </AppBar>
+    )
+  }
+}
+
+const mapStateToProps = (state: AppState) => {
+  return {
+    topicFilter: state.settings.get('topicFilter'),
+  }
+}
+
+const mapDispatchToProps = (dispatch: any) => {
+  return {
+    actions: {
+      settings: bindActionCreators(settingsActions, dispatch),
+      global: bindActionCreators(globalActions, dispatch),
+      connection: bindActionCreators(connectionActions, dispatch),
+    },
+  }
+}
+
+export default connect(
+  mapStateToProps,
+  mapDispatchToProps
+)(withStyles(styles)(TitleBar))

app/src/components/Settings.tsx

@@ -1,155 +0,0 @@
-import * as React from 'react'
-import * as q from '../../../backend/src/Model'
-
-import Drawer from '@material-ui/core/Drawer'
-import IconButton from '@material-ui/core/IconButton'
-import Paper from '@material-ui/core/Paper'
-import Divider from '@material-ui/core/Divider'
-import MenuItem from '@material-ui/core/MenuItem'
-import Select from '@material-ui/core/Select'
-
-import ChevronRight from '@material-ui/icons/ChevronRight'
-
-import { Typography, InputBase, Input, InputLabel } from '@material-ui/core'
-import { withStyles, StyleRulesCallback } from '@material-ui/core/styles'
-
-import { settingsActions } from '../actions'
-import { AppState, NodeOrder } from '../reducers'
-
-import { connect } from 'react-redux'
-import { bindActionCreators } from 'redux'
-
-const styles: StyleRulesCallback = theme => ({
-  drawer: {
-    backgroundColor: theme.palette.background.default,
-    flexShrink: 0,
-  },
-  paper: {
-    width: '300px',
-  },
-  title: {
-    color: theme.palette.text.primary,
-    paddingTop: `${theme.spacing.unit}px`,
-    ...theme.mixins.toolbar,
-  },
-  input: {
-    minWidth: '150px',
-    margin: `auto ${theme.spacing.unit}px auto ${2 * theme.spacing.unit}px`,
-  },
-})
-
-interface Props {
-  actions?: any
-  autoExpandLimit: number
-  visible: boolean
-  store?: any
-  classes: any
-  nodeOrder: NodeOrder
-}
-
-class Settings extends React.Component<Props, {}> {
-  constructor(props: any) {
-    super(props)
-    this.state = {}
-  }
-
-  public render() {
-    const { classes, actions, visible } = this.props
-    return (
-      <Drawer
-        anchor="left"
-        className={classes.drawer}
-        open={visible}
-        variant="persistent"
-      >
-        <div
-          className={classes.paper}
-          tabIndex={0}
-          role="button"
-        >
-
-          <Typography className={classes.title} variant="h6" color="inherit">
-            <IconButton onClick={actions.toggleSettingsVisibility}>
-              <ChevronRight />
-            </IconButton>
-            Settings
-          </Typography>
-          <Divider />
-
-          {this.renderAutoExpand()}
-          {this.renderNodeOrder()}
-        </div>
-      </Drawer>
-    )
-  }
-
-  private renderAutoExpand() {
-    const { classes, autoExpandLimit } = this.props
-
-    return (
-        <div style={{ padding: '8px' }}>
-        <InputLabel htmlFor="auto-expand">Auto Expand</InputLabel>
-        <Select
-            value={autoExpandLimit}
-            onChange={this.onChangeAutoExpand}
-            input={<Input name="auto-expand" id="auto-expand-label-placeholder" />}
-            displayEmpty={true}
-            name="auto-expand"
-            className={classes.input}
-        >
-          <MenuItem value={0}><em>Disabled</em></MenuItem>
-          <MenuItem value={2}>Few</MenuItem>
-          <MenuItem value={3}>Some</MenuItem>
-          <MenuItem value={10}>Most</MenuItem>
-          <MenuItem value={1E6}>All</MenuItem>
-        </Select>
-      </div>
-    )
-  }
-
-  private onChangeAutoExpand = (e: React.ChangeEvent<HTMLSelectElement>) => {
-    this.props.actions.setAutoExpandLimit(e.target.value)
-  }
-
-  private renderNodeOrder() {
-    const { classes, nodeOrder } = this.props
-
-    return (
-      <div style={{ padding: '8px' }}>
-      <InputLabel htmlFor="auto-expand">Topic order</InputLabel>
-      <Select
-          value={nodeOrder}
-          onChange={this.onChangeSorting}
-          input={<Input name="node-order" id="node-order-label-placeholder" />}
-          displayEmpty={true}
-          name="node-order"
-          className={classes.input}
-      >
-        <MenuItem value={NodeOrder.none}><em>default</em></MenuItem>
-        <MenuItem value={NodeOrder.abc}>a-z</MenuItem>
-        <MenuItem value={NodeOrder.messages}>{NodeOrder.messages}</MenuItem>
-        <MenuItem value={NodeOrder.topics}>{NodeOrder.topics}</MenuItem>
-      </Select>
-    </div>)
-  }
-
-  private onChangeSorting = (e: React.ChangeEvent<HTMLSelectElement>) => {
-    this.props.actions.setNodeOrder(e.target.value)
-  }
-}
-
-const mapStateToProps = (state: AppState) => {
-  return {
-    autoExpandLimit: state.settings.autoExpandLimit,
-    nodeOrder: state.settings.nodeOrder,
-    visible: state.settings.visible,
-  }
-}
-
-const mapDispatchToProps = (dispatch: any) => {
-  return {
-    actions: bindActionCreators(settingsActions, dispatch),
-  }
-}
-
-export default withStyles(styles)(connect(mapStateToProps, mapDispatchToProps)(Settings))

app/src/components/SettingsDrawer/BooleanSwitch.tsx

@@ -0,0 +1,36 @@
+import * as React from 'react'
+import { InputLabel, Switch, Theme, Tooltip } from '@material-ui/core'
+import { withStyles } from '@material-ui/styles'
+const sha1 = require('sha1')
+
+function BooleanSwitch(props: { title: string; value: boolean; tooltip: string; action: () => void; classes: any }) {
+  const { tooltip, value, action, title, classes } = props
+
+  const clickHandler = (e: React.MouseEvent) => {
+    e.stopPropagation()
+    e.preventDefault()
+    action()
+  }
+
+  return (
+    <div style={{ padding: '8px', display: 'flex' }}>
+      <Tooltip title={tooltip}>
+        <InputLabel htmlFor={`toggle-${sha1(title)}`} onClick={clickHandler} className={classes.label}>
+          {title}
+        </InputLabel>
+      </Tooltip>
+      <Tooltip title={tooltip}>
+        <Switch name={`toggle-${sha1(title)}`} checked={value} onChange={action} color="primary" />
+      </Tooltip>
+    </div>
+  )
+}
+
+const styles = (theme: Theme) => ({
+  label: {
+    flex: '1',
+    paddingTop: theme.spacing(1.5),
+  },
+})
+
+export default withStyles(styles)(BooleanSwitch)

app/src/components/SettingsDrawer/BrokerStatistics.tsx

@@ -0,0 +1,138 @@
+import * as q from '../../../../backend/src/Model'
+import React, { useMemo } from 'react'
+import { AppState } from '../../reducers'
+import { Base64Message } from '../../../../backend/src/Model/Base64Message'
+import { connect } from 'react-redux'
+import { Theme, withStyles } from '@material-ui/core/styles'
+import { TopicViewModel } from '../../model/TopicViewModel'
+import { Typography } from '@material-ui/core'
+import { usePollingToFetchTreeNode } from '../helper/usePollingToFetchTreeNode'
+const abbreviate = require('number-abbreviate')
+
+interface Stats {
+  topic: string
+  title: string
+}
+
+const styles = (theme: Theme) => ({
+  container: {
+    width: '100%',
+    height: '224px',
+    backgroundColor: theme.palette.type === 'dark' ? 'rebeccapurple' : '#ebebeb',
+    marginBottom: 0,
+    padding: '8px',
+  },
+})
+
+interface Props {
+  classes: any
+  tree?: q.Tree<TopicViewModel>
+}
+
+function BrokerStatistics(props: Props) {
+  const { tree, classes } = props
+  const sysTopic = usePollingToFetchTreeNode(props.tree, '$SYS')
+
+  return useMemo(() => {
+    if (!Boolean(sysTopic)) {
+      return null
+    }
+
+    const stats: any = {
+      broker: {
+        topic: '$SYS/broker/version',
+        title: 'Broker',
+      },
+      clients: {
+        topic: '$SYS/broker/clients/total',
+        title: 'Clients',
+      },
+      subscriptions: {
+        topic: '$SYS/broker/subscriptions/count',
+        title: 'Subscriptions',
+      },
+      received: {
+        topic: '$SYS/broker/messages/received',
+        title: 'Received',
+      },
+      sent: {
+        topic: '$SYS/broker/messages/sent',
+        title: 'Sent',
+      },
+      received5m: {
+        topic: '$SYS/broker/load/messages/received/5min',
+        title: 'Received last 5min',
+      },
+      sent5m: {
+        topic: '$SYS/broker/load/messages/sent/5min',
+        title: 'Sent 5m',
+      },
+      heap: {
+        topic: '$SYS/broker/heap/current',
+        title: 'Memory',
+      },
+      heapMax: {
+        topic: '$SYS/broker/heap/maximum',
+        title: 'Memory (max)',
+      },
+    }
+
+    if (!tree) {
+      return null
+    }
+
+    return (
+      <div className={classes.container}>
+        {renderStat(tree, stats.broker)}
+        {renderPair(tree, stats.sent, stats.received)}
+        {renderPair(tree, stats.clients, stats.subscriptions)}
+        {renderPair(tree, stats.sent5m, stats.received5m)}
+        {renderPair(tree, stats.heap, stats.heapMax)}
+      </div>
+    )
+  }, [sysTopic && sysTopic.lastUpdate])
+}
+
+const mapStateToProps = (state: AppState) => {
+  return {
+    tree: state.connection.tree,
+  }
+}
+
+export default withStyles(styles)(connect(mapStateToProps)(BrokerStatistics))
+
+function renderPair(tree: q.Tree<TopicViewModel>, a: Stats, b: Stats) {
+  return (
+    <div
+      style={{
+        display: 'flex',
+        width: '100%',
+      }}
+    >
+      <div style={{ flex: 1 }}>{renderStat(tree, a)}</div>
+      <div style={{ flex: 1 }}>{renderStat(tree, b)}</div>
+    </div>
+  )
+}
+
+function renderStat(tree: q.Tree<TopicViewModel>, stat: Stats) {
+  const node = tree.findNode(stat.topic)
+  if (!node || !node.message) {
+    return null
+  }
+
+  const str = node.message.value ? Base64Message.toUnicodeString(node.message.value) : ''
+  let value = node.message && node.message.value ? parseFloat(str) : NaN
+  value = !isNaN(value) ? abbreviate(value) : str
+
+  return (
+    <div key={stat.title}>
+      <Typography>
+        <b>{stat.title}</b>
+      </Typography>
+      <Typography style={{ paddingLeft: '8px' }}>
+        <i>{value}</i>
+      </Typography>
+    </div>
+  )
+}

app/src/components/SettingsDrawer/Settings.tsx

@@ -0,0 +1,263 @@
+import * as React from 'react'
+import BooleanSwitch from './BooleanSwitch'
+import BrokerStatistics from './BrokerStatistics'
+import ChevronRight from '@material-ui/icons/ChevronRight'
+import TimeLocale from './TimeLocale'
+import { AppState } from '../../reducers'
+import { bindActionCreators } from 'redux'
+import { connect } from 'react-redux'
+import { globalActions, settingsActions } from '../../actions'
+import { shell } from 'electron'
+import { Theme, withStyles } from '@material-ui/core/styles'
+import { TopicOrder } from '../../reducers/Settings'
+
+import {
+  Divider,
+  Drawer,
+  IconButton,
+  Input,
+  InputLabel,
+  MenuItem,
+  Select,
+  Typography,
+  Tooltip,
+} from '@material-ui/core'
+
+export const autoExpandLimitSet = [
+  {
+    limit: 0,
+    name: 'Collapsed',
+  },
+  {
+    limit: 2,
+    name: 'Few',
+  },
+  {
+    limit: 5,
+    name: 'Some',
+  },
+  {
+    limit: 15,
+    name: 'Most',
+  },
+  {
+    limit: 30,
+    name: 'Most',
+  },
+  {
+    limit: 1e6,
+    name: 'All',
+  },
+]
+
+const styles = (theme: Theme) => ({
+  drawer: {
+    backgroundColor: theme.palette.background.default,
+    flexShrink: 0,
+    userSelect: 'none' as 'none',
+  },
+  paper: {
+    width: '300px',
+  },
+  title: {
+    color: theme.palette.text.primary,
+    paddingTop: theme.spacing(1),
+    ...theme.mixins.toolbar,
+  },
+  input: {
+    minWidth: '150px',
+    margin: `auto ${theme.spacing(1)} auto ${theme.spacing(2)}px`,
+  },
+  author: {
+    margin: 'auto 8px 8px auto',
+    color: theme.palette.text.hint,
+    cursor: 'pointer' as 'pointer',
+  },
+})
+
+interface Props {
+  actions: {
+    settings: typeof settingsActions
+    global: typeof globalActions
+  }
+  autoExpandLimit: number
+  classes: any
+  highlightTopicUpdates: boolean
+  selectTopicWithMouseOver: boolean
+  store?: any
+  topicOrder: TopicOrder
+  visible: boolean
+  theme: 'light' | 'dark'
+}
+
+class Settings extends React.Component<Props, {}> {
+  constructor(props: any) {
+    super(props)
+    this.state = {}
+  }
+
+  private openGithubPage = () => {
+    shell.openExternal('https://github.com/thomasnordquist')
+  }
+
+  private renderHighlightTopicUpdates() {
+    const { highlightTopicUpdates, actions } = this.props
+
+    return (
+      <BooleanSwitch
+        title="Show Activity"
+        tooltip="Topics blink when a new message arrives"
+        value={highlightTopicUpdates}
+        action={actions.settings.toggleHighlightTopicUpdates}
+      />
+    )
+  }
+
+  private selectTopicsOnMouseOver() {
+    const { actions, selectTopicWithMouseOver } = this.props
+    const toggle = () => actions.settings.selectTopicWithMouseOver(!selectTopicWithMouseOver)
+
+    return (
+      <BooleanSwitch
+        title="Quick Preview"
+        tooltip="Select topics on mouse over"
+        value={selectTopicWithMouseOver}
+        action={toggle}
+      />
+    )
+  }
+
+  private toggleTheme() {
+    const { actions, theme } = this.props
+
+    return (
+      <BooleanSwitch
+        title="Dark Mode"
+        tooltip="Enable dark theme"
+        value={theme === 'dark'}
+        action={actions.settings.toggleTheme}
+      />
+    )
+  }
+
+  private renderAutoExpand() {
+    const { classes, autoExpandLimit } = this.props
+
+    const limits = autoExpandLimitSet.map(limit => (
+      <MenuItem key={limit.limit} value={limit.limit}>
+        {limit.limit < 10000 && limit.limit > 0 ? `≤ ${limit.limit} topics` : limit.name}
+      </MenuItem>
+    ))
+    return (
+      <div style={{ padding: '8px', display: 'flex' }}>
+        <InputLabel htmlFor="auto-expand" style={{ flex: '1', marginTop: '8px' }}>
+          Auto Expand
+        </InputLabel>
+        <Select
+          value={autoExpandLimit}
+          onChange={this.onChangeAutoExpand}
+          input={<Input name="auto-expand" id="auto-expand-label-placeholder" />}
+          name="auto-expand"
+          className={classes.input}
+          style={{ flex: '1' }}
+        >
+          {limits}
+        </Select>
+      </div>
+    )
+  }
+
+  private onChangeAutoExpand = (e: React.ChangeEvent<{ value: unknown }>) => {
+    this.props.actions.settings.setAutoExpandLimit(parseInt(String(e.target.value), 10))
+  }
+
+  private renderNodeOrder() {
+    const { classes, topicOrder } = this.props
+
+    return (
+      <div style={{ padding: '8px', display: 'flex' }}>
+        <InputLabel htmlFor="auto-expand" style={{ flex: '1', marginTop: '8px' }}>
+          Topic Order
+        </InputLabel>
+        <Select
+          value={topicOrder}
+          onChange={this.onChangeSorting}
+          input={<Input name="node-order" id="node-order-label-placeholder" />}
+          displayEmpty={true}
+          name="node-order"
+          className={classes.input}
+          style={{ flex: '1' }}
+        >
+          <MenuItem value={TopicOrder.none}>
+            <em>default</em>
+          </MenuItem>
+          <MenuItem value={TopicOrder.abc}>a-z</MenuItem>
+          <MenuItem value={TopicOrder.messages}>{TopicOrder.messages}</MenuItem>
+          <MenuItem value={TopicOrder.topics}>{TopicOrder.topics}</MenuItem>
+        </Select>
+      </div>
+    )
+  }
+
+  private onChangeSorting = (e: React.ChangeEvent<{ value: unknown }>) => {
+    this.props.actions.settings.setTopicOrder(e.target.value as TopicOrder)
+  }
+
+  public render() {
+    const { classes, actions, visible } = this.props
+    return (
+      <Drawer anchor="left" className={classes.drawer} open={visible} variant="persistent">
+        <div className={classes.paper} tabIndex={0} role="button">
+          <Typography className={classes.title} variant="h6" color="inherit">
+            <IconButton onClick={actions.global.toggleSettingsVisibility}>
+              <ChevronRight />
+            </IconButton>
+            Settings
+          </Typography>
+          <Divider style={{ userSelect: 'none' }} />
+        </div>
+        <div>
+          {this.renderAutoExpand()}
+          {this.renderNodeOrder()}
+          <TimeLocale />
+          {this.renderHighlightTopicUpdates()}
+          {this.selectTopicsOnMouseOver()}
+          {this.toggleTheme()}
+        </div>
+        <Tooltip placement="top" title="App Author">
+          <Typography className={classes.author} onClick={this.openGithubPage}>
+            by Thomas Nordquist
+          </Typography>
+        </Tooltip>
+        <BrokerStatistics />
+      </Drawer>
+    )
+  }
+}
+
+const mapStateToProps = (state: AppState) => {
+  return {
+    autoExpandLimit: state.settings.get('autoExpandLimit'),
+    topicOrder: state.settings.get('topicOrder'),
+    visible: state.globalState.get('settingsVisible'),
+    highlightTopicUpdates: state.settings.get('highlightTopicUpdates'),
+    selectTopicWithMouseOver: state.settings.get('selectTopicWithMouseOver'),
+    theme: state.settings.get('theme'),
+  }
+}
+
+const mapDispatchToProps = (dispatch: any) => {
+  return {
+    actions: {
+      settings: bindActionCreators(settingsActions, dispatch),
+      global: bindActionCreators(globalActions, dispatch),
+    },
+  }
+}
+
+export default withStyles(styles)(
+  connect(
+    mapStateToProps,
+    mapDispatchToProps
+  )(Settings)
+)

app/src/components/SettingsDrawer/TimeLocale.tsx

@@ -0,0 +1,90 @@
+import * as React from 'react'
+import DateFormatter from '../helper/DateFormatter'
+import { AppState } from '../../reducers'
+import { bindActionCreators } from 'redux'
+import { connect } from 'react-redux'
+import { Input, InputLabel, MenuItem, Select, StyleRulesCallback, Theme } from '@material-ui/core'
+import { settingsActions } from '../../actions'
+import { withStyles } from '@material-ui/styles'
+const moment = require('moment/min/moment-with-locales')
+
+interface Props {
+  actions: {
+    settings: typeof settingsActions
+  }
+  timeLocale: string
+  classes: any
+}
+
+function TimeLocaleSettings(props: Props) {
+  const { classes, timeLocale, actions } = props
+  const locales = moment.locales()
+  const date = new Date()
+  const localeMenuItems = locales.map((l: string) => (
+    <MenuItem key={l} value={l}>
+      <div>
+        Locale: <b>{l}</b>, Format:{' '}
+        <b>
+          <DateFormatter date={date} overrideLocale={l} />
+        </b>
+      </div>
+    </MenuItem>
+  ))
+
+  function updateLocale(e: React.ChangeEvent<{ value: unknown }>) {
+    const locale = e.target.value ? String(e.target.value) : ''
+    actions.settings.setTimeLocale(locale)
+  }
+
+  return (
+    <div style={{ padding: '8px', display: 'flex' }}>
+      <InputLabel htmlFor="time-locale" style={{ flex: '1', marginTop: '8px' }}>
+        Time Locale
+      </InputLabel>
+      <Select
+        value={timeLocale}
+        onChange={updateLocale}
+        input={<Input name="time-locale" id="time-locale-label-placeholder" />}
+        name="time-locale"
+        className={classes.input}
+        renderValue={v => <span>{String(v)}</span>}
+        style={{ flex: '1' }}
+      >
+        {localeMenuItems}
+      </Select>
+    </div>
+  )
+}
+
+const mapStateToProps = (state: AppState) => {
+  return {
+    timeLocale: state.settings.get('timeLocale'),
+  }
+}
+
+const mapDispatchToProps = (dispatch: any) => {
+  return {
+    actions: {
+      settings: bindActionCreators(settingsActions, dispatch),
+    },
+  }
+}
+
+const styles = (theme: Theme) => ({
+  input: {
+    minWidth: '150px',
+    margin: `auto ${theme.spacing(1)} auto ${theme.spacing(2)}px`,
+  },
+  selected: {
+    '& div': {
+      display: 'none',
+    },
+  },
+})
+
+export default withStyles(styles)(
+  connect(
+    mapStateToProps,
+    mapDispatchToProps
+  )(TimeLocaleSettings)
+)

app/src/components/Sidebar/CodeBlockColors.ts

@@ -0,0 +1,19 @@
+export enum CodeBlockColors {
+  text = '#080808',
+  background = '#F9F9F9',
+  numeric = '#811F24',
+  boolean = '#811F24',
+  string = '#0B6125',
+  variable = '#234A97',
+  gutters = '#ebebeb',
+}
+
+export enum CodeBlockColorsBraceMonokai {
+  text = '#F8F8F2',
+  background = '#272822',
+  numeric = '#AE81FF',
+  boolean = '#AE81FF',
+  string = '#E6DB74',
+  variable = '#A6E22E',
+  gutters = '#2F3129',
+}

app/src/components/Sidebar/CodeDiff/ChartPreview.tsx

@@ -0,0 +1,91 @@
+import * as q from '../../../../../backend/src/Model'
+import * as React from 'react'
+import ShowChart from '@material-ui/icons/ShowChart'
+import TopicPlot from '../../TopicPlot'
+import { bindActionCreators } from 'redux'
+import { chartActions } from '../../../actions'
+import { connect } from 'react-redux'
+import { Fade, Paper, Popper, Tooltip } from '@material-ui/core'
+import { JsonPropertyLocation } from '../../../../../backend/src/JsonAstParser'
+
+interface Props {
+  treeNode: q.TreeNode<any>
+  classes: any
+  literal: JsonPropertyLocation
+  actions: {
+    chart: typeof chartActions
+  }
+}
+
+function ChartPreview(props: Props) {
+  const chartIconRef = React.useRef(null)
+  const [open, setOpen] = React.useState(false)
+
+  const onClick = React.useCallback(() => {
+    props.actions.chart.addChart({
+      topic: props.treeNode.path(),
+      dotPath: props.literal.path !== '' ? props.literal.path : undefined,
+    })
+    setOpen(false)
+  }, [props.literal.path, props.treeNode])
+
+  const mouseOver = React.useCallback(() => {
+    setOpen(true)
+  }, [])
+
+  const mouseOut = React.useCallback(() => {
+    setOpen(false)
+  }, [])
+
+  const hasEnoughDataToDisplayDiagrams = props.treeNode.messageHistory.count() > 1
+
+  const addChartToPanelButton = hasEnoughDataToDisplayDiagrams ? (
+    <Tooltip title="Add to chart panel">
+      <ShowChart
+        ref={chartIconRef}
+        className={props.classes.icon}
+        onMouseEnter={mouseOver}
+        onMouseLeave={mouseOut}
+        onClick={onClick}
+        data-test-type="ShowChart"
+        data-test={props.literal.path}
+      />
+    </Tooltip>
+  ) : (
+    <Tooltip title="Add to chart panel, not enough data for preview">
+      <ShowChart
+        onClick={onClick}
+        className={props.classes.icon}
+        style={{ color: '#aaa' }}
+        data-test-type="ShowChart"
+        data-test={props.literal.path}
+      />
+    </Tooltip>
+  )
+
+  return (
+    <span>
+      {addChartToPanelButton}
+      <Popper open={open} anchorEl={chartIconRef.current} placement="left-end">
+        <Fade in={open} timeout={300}>
+          <Paper style={{ width: '300px' }}>
+            {open ? <TopicPlot history={props.treeNode.messageHistory} dotPath={props.literal.path} /> : <span />}
+          </Paper>
+        </Fade>
+      </Popper>
+    </span>
+  )
+}
+
+const mapDispatchToProps = (dispatch: any) => {
+  return {
+    actions: {
+      chart: bindActionCreators(chartActions, dispatch),
+    },
+  }
+}
+
+export default connect(
+  undefined,
+  mapDispatchToProps
+)(ChartPreview)

app/src/components/Sidebar/CodeDiff/DiffCount.tsx

@@ -0,0 +1,45 @@
+import * as React from 'react'
+import { Theme } from '@material-ui/core'
+import { withStyles } from '@material-ui/styles'
+
+interface Props {
+  changes: Array<Diff.Change>
+  classes: { [s: string]: any }
+  nameOfCompareMessage: string
+}
+
+function changeAmount(props: Props) {
+  const additions = props.changes.map(change => (change.added === true ? change.count || 0 : 0)).reduce((a, b) => a + b)
+  const deletions = props.changes
+    .map(change => (change.removed === true ? change.count || 0 : 0))
+    .reduce((a, b) => a + b)
+  if (additions === 0 && deletions === 0) {
+    return null
+  }
+
+  return (
+    <span style={{ display: 'block', textAlign: 'right' }}>
+      <span>
+        Comparing with <b>{props.nameOfCompareMessage}</b> message:&nbsp;
+        <span className={props.classes.additions}>
+          + {additions} line{additions === 1 ? '' : 's'}
+        </span>
+        ,{' '}
+        <span className={props.classes.deletions}>
+          - {deletions} line{deletions === 1 ? '' : 's'}
+        </span>
+      </span>
+    </span>
+  )
+}
+
+const style = (theme: Theme) => ({
+  additions: {
+    color: 'rgb(10, 255, 10)',
+  },
+  deletions: {
+    color: 'rgb(255, 10, 10)',
+  },
+})
+
+export default withStyles(style)(changeAmount)

app/src/components/Sidebar/CodeDiff/Gutters.tsx

@@ -0,0 +1,104 @@
+import * as diff from 'diff'
+import * as q from '../../../../../backend/src/Model'
+import * as React from 'react'
+import Add from '@material-ui/icons/Add'
+import ChartPreview from './ChartPreview'
+import Remove from '@material-ui/icons/Remove'
+import { JsonPropertyLocation } from '../../../../../backend/src/JsonAstParser'
+import { lineChangeStyle, trimNewlineRight } from './util'
+import { Theme } from '@material-ui/core'
+import { withStyles } from '@material-ui/styles'
+
+interface Props {
+  changes: Array<diff.Change>
+  literalPositions: Array<JsonPropertyLocation>
+  classes: any
+  className: string
+  treeNode: q.TreeNode<any>
+}
+
+const style = (theme: Theme) => {
+  const icon = {
+    verticalAlign: 'top',
+    width: '12px',
+    height: '12px',
+    marginTop: '2px',
+    borderRadius: '50%',
+  }
+
+  return {
+    icon,
+    iconButton: {
+      ...icon,
+      marginTop: '0px',
+      width: '16px',
+      height: '16px',
+      padding: '2px',
+      '&:hover': {
+        color: theme.palette.primary.contrastText,
+        backgroundColor: theme.palette.primary.main,
+      },
+    },
+    gutterLine: {
+      textAlign: 'right' as 'right',
+      paddingRight: theme.spacing(0.5),
+      height: '16px',
+      width: '100%',
+    },
+  }
+}
+
+function tokensForLine(change: diff.Change, line: number, props: Props) {
+  const { classes, literalPositions } = props
+  const literal = literalPositions[line]
+
+  const chartPreview = Boolean(literal) ? (
+    <ChartPreview
+      key="chartPreview"
+      treeNode={props.treeNode}
+      classes={{ icon: props.classes.iconButton }}
+      literal={literal}
+    />
+  ) : null
+
+  if (change.added) {
+    return [chartPreview, <Add key="add" className={classes.icon} />]
+  } else if (change.removed) {
+    return [<Remove key="remove" className={classes.icon} />]
+  } else {
+    return [
+      chartPreview,
+      <div
+        key="placeholder"
+        style={{ width: '12px', display: 'inline-block' }}
+        dangerouslySetInnerHTML={{ __html: '&nbsp;' }}
+      />,
+    ]
+  }
+}
+
+function Gutters(props: Props) {
+  let currentLine = -1
+  const gutters = props.changes
+    .map((change, key) => {
+      return trimNewlineRight(change.value)
+        .split('\n')
+        .map((_, idx) => {
+          currentLine = !change.removed ? currentLine + 1 : currentLine
+          return (
+            <div key={`${key}-${idx}`} style={lineChangeStyle(change)} className={props.classes.gutterLine}>
+              {tokensForLine(change, currentLine, props)}
+            </div>
+          )
+        })
+    })
+    .reduce((a, b) => a.concat(b), [])
+
+  return (
+    <span>
+      <pre className={props.className}>{gutters}</pre>
+    </span>
+  )
+}
+
+export default withStyles(style)(Gutters)

app/src/components/Sidebar/CodeDiff/index.tsx

@@ -0,0 +1,107 @@
+import * as diff from 'diff'
+import * as Prism from 'prismjs'
+import * as q from '../../../../../backend/src/Model'
+import * as React from 'react'
+import DiffCount from './DiffCount'
+import Gutters from './Gutters'
+import { isPlottable, lineChangeStyle, trimNewlineRight } from './util'
+import { JsonPropertyLocation, literalsMappedByLines } from '../../../../../backend/src/JsonAstParser'
+import { selectTextWithCtrlA } from '../../../utils/handleTextSelectWithCtrlA'
+import { style } from './style'
+import { withStyles } from '@material-ui/core'
+import 'prismjs/components/prism-json'
+
+interface Props {
+  treeNode: q.TreeNode<any>
+  previous: string
+  current: string
+  nameOfCompareMessage: string
+  language?: 'json'
+  classes: any
+}
+
+interface State {}
+
+class CodeDiff extends React.Component<Props, State> {
+  private handleCtrlA = selectTextWithCtrlA({ targetSelector: 'pre ~ pre' })
+
+  constructor(props: Props) {
+    super(props)
+    this.state = {}
+  }
+
+  private isValidJson(str: string) {
+    try {
+      JSON.parse(str)
+      return true
+    } catch (error) {
+      return false
+    }
+  }
+
+  private plottableLiteralsIndexedWithLineNumbers() {
+    const allLiterals = this.isValidJson(this.props.current) ? literalsMappedByLines(this.props.current) || [] : []
+
+    return allLiterals.map((l: JsonPropertyLocation) => (isPlottable(l.value) ? l : undefined)) as Array<
+      JsonPropertyLocation
+    >
+  }
+
+  private renderStyledCodeLines(changes: Array<Diff.Change>) {
+    const styledLines = Prism.highlight(this.props.current, Prism.languages.json, 'json').split('\n')
+    let lineNumber = 0
+
+    return changes
+      .map((change, key) => {
+        const hasStyledCode = change.removed !== true
+        const changedLines = change.count || 0
+        if (hasStyledCode && this.props.language === 'json') {
+          const currentLines = styledLines.slice(lineNumber, lineNumber + changedLines)
+          const lines = currentLines.map((html: string, idx: number) => {
+            return (
+              <div key={`${key}-${idx}`} style={lineChangeStyle(change)} className={this.props.classes.line}>
+                <span dangerouslySetInnerHTML={{ __html: html }} />
+              </div>
+            )
+          })
+          lineNumber += changedLines
+
+          return [<div key={key}>{lines}</div>]
+        }
+
+        return trimNewlineRight(change.value)
+          .split('\n')
+          .map((line, idx) => {
+            return (
+              <div key={`${key}-${idx}`} style={lineChangeStyle(change)} className={this.props.classes.line}>
+                <span>{line}</span>
+              </div>
+            )
+          })
+      })
+      .reduce((a, b) => a.concat(b), [])
+  }
+
+  public render() {
+    const changes = diff.diffLines(this.props.previous, this.props.current)
+    const literalPositions = this.plottableLiteralsIndexedWithLineNumbers()
+    const code = this.renderStyledCodeLines(changes)
+
+    return (
+      <div>
+        <div tabIndex={0} onKeyDown={this.handleCtrlA} className={this.props.classes.codeWrapper}>
+          <Gutters
+            className={this.props.classes.gutters}
+            changes={changes}
+            treeNode={this.props.treeNode}
+            literalPositions={literalPositions}
+          />
+          <pre className={this.props.classes.codeBlock}>{code}</pre>
+        </div>
+        <DiffCount changes={changes} nameOfCompareMessage={this.props.nameOfCompareMessage} />
+      </div>
+    )
+  }
+}
+
+export default withStyles(style)(CodeDiff)

app/src/components/Sidebar/CodeDiff/style.tsx

@@ -0,0 +1,63 @@
+import { CodeBlockColors, CodeBlockColorsBraceMonokai } from '../CodeBlockColors'
+import { Theme } from '@material-ui/core'
+
+export const style = (theme: Theme) => {
+  const codeBlockColors = theme.palette.type === 'light' ? CodeBlockColors : CodeBlockColorsBraceMonokai
+  const codeBaseStyle = {
+    font: "12px/normal 'Monaco', 'Menlo', 'Ubuntu Mono', 'Consolas', 'source-code-pro', monospace",
+    display: 'inline-grid' as 'inline-grid',
+    margin: '0',
+    padding: '1px 0 0 0',
+  }
+
+  return {
+    line: {
+      lineHeight: 'normal' as 'normal',
+      paddingLeft: '4px',
+      width: '100%',
+      height: '16px',
+    },
+    codeWrapper: {
+      display: 'flex',
+      maxHeight: '15em',
+      overflow: 'auto',
+      backgroundColor: `${codeBlockColors.background}`,
+      margin: '8px 0 0 0',
+    },
+    gutters: {
+      ...codeBaseStyle,
+      width: '33px',
+      backgroundColor: codeBlockColors.gutters,
+      userSelect: 'none' as 'none',
+    },
+    codeBlock: {
+      ...codeBaseStyle,
+      width: 'calc(100% - 33px)',
+      backgroundColor: 'inherit !important',
+      '& span': {
+        color: codeBlockColors.text,
+      },
+      '& .token.number': {
+        color: codeBlockColors.numeric,
+      },
+      '& .token.boolean': {
+        color: codeBlockColors.numeric,
+      },
+      '& .token.property': {
+        color: codeBlockColors.variable,
+      },
+      '& .token.string': {
+        color: codeBlockColors.string,
+      },
+      '& .token': {
+        color: codeBlockColors.text,
+      },
+      '& .token.operator': {
+        color: codeBlockColors.text,
+      },
+      '& .token.punctuation': {
+        color: codeBlockColors.text,
+      },
+    },
+  }
+}

app/src/components/Sidebar/CodeDiff/util.tsx

@@ -0,0 +1,69 @@
+export function trimNewlineRight(str: string) {
+  if (str.slice(-1) === '\n') {
+    return str.slice(0, -1)
+  }
+
+  return str
+}
+
+const gutterBaseStyle = {}
+
+const additionStyle = {
+  ...gutterBaseStyle,
+  backgroundColor: 'rgba(10, 255, 10, 0.3)',
+}
+
+const deletionStyle = {
+  ...gutterBaseStyle,
+  backgroundColor: 'rgba(255, 10, 10, 0.3)',
+}
+
+export function lineChangeStyle(change: Diff.Change) {
+  if (change.added === true) {
+    return additionStyle
+  }
+
+  if (change.removed === true) {
+    return deletionStyle
+  }
+
+  return gutterBaseStyle
+}
+
+export function toPlottableValue(value: any): number | undefined {
+  if (typeof value === 'number') {
+    return value
+  }
+
+  if (typeof value === 'boolean') {
+    return value ? 1 : 0
+  }
+
+  const isNumber = !isNaN(value)
+  const floatVal = parseFloat(value)
+  if (isNumber && !isNaN(floatVal)) {
+    return floatVal
+  }
+
+  const intVal = parseInt(value, undefined)
+  if (isNumber && !isNaN(intVal)) {
+    return intVal
+  }
+
+  // Convert "on" / "off" to int 1 / 0
+  if (typeof value === 'string') {
+    if (/^(on$)|(off$)/i.test(value)) {
+      return value.toLowerCase() === 'on' ? 1 : 0
+    }
+    if (/^[0-9]*,[0-9]+$/.test(value)) {
+      let parsedFloat = parseFloat(value.replace(',', '.'))
+      if (!isNaN(parsedFloat)) {
+        return parsedFloat
+      }
+    }
+  }
+}
+
+export function isPlottable(value: any) {
+  return !isNaN(toPlottableValue(value) as any)
+}

app/src/components/Sidebar/History.tsx

@@ -1,89 +0,0 @@
-import * as React from 'react'
-import * as q from '../../../../backend/src/Model'
-
-import { Badge, Typography } from '@material-ui/core'
-import { Theme, withStyles } from '@material-ui/core/styles'
-
-interface HistoryItem {
-  title: string
-  value: string
-}
-
-interface Props {
-  items: HistoryItem[]
-  onClick?: (index: number, element: EventTarget) => void
-  classes: any
-}
-
-interface State {
-  collapsed: boolean
-}
-
-class MessageHistory extends React.Component<Props, State> {
-  constructor(props: any) {
-    super(props)
-    this.state = {
-      collapsed: true,
-    }
-  }
-
-  public renderHistory() {
-    const messageStyle: React.CSSProperties = { textOverflow: 'ellipsis', whiteSpace: 'nowrap', overflow: 'hidden' }
-    const elements = this.props.items.map((element, index) => (
-      <div
-        key={index}
-        style={{
-          backgroundColor: 'rgba(80, 80, 80, 0.6)',
-          margin: '8px',
-          padding: '8px 8px 0 8px',
-          cursor: this.props.onClick ? 'pointer' : 'inherit',
-        }}
-        onClick={(event: React.MouseEvent) => this.props.onClick && this.props.onClick(index, event.target)}
-      >
-        <div><i>{element.title}</i></div>
-        <div style={messageStyle}>
-          <span><pre>{element.value}</pre></span>
-        </div>
-      </div>
-    ))
-
-    return (
-      <div style={{ backgroundColor: 'rgba(60, 60, 60, 0.6)', marginTop: '16px' }}>
-        <Typography
-          onClick={this.toggle}
-          style={{ cursor: 'pointer' }}
-        >
-          {this.state.collapsed ? '▶' : '▼'} History
-        </Typography>
-        <div style={{ maxHeight: '230px', overflowY: 'scroll'  }}>
-          {this.state.collapsed ? null : elements}
-        </div>
-      </div>
-    )
-  }
-
-  public render() {
-    const visible = this.props.items.length > 0 && this.state.collapsed
-    return (
-      <Badge
-        style={{ display: 'block', width: '100%' }}
-        invisible={!visible}
-        badgeContent={this.props.items.length}
-        color="primary"
-        classes={{ badge: this.props.classes.badge }}
-      >
-        {this.renderHistory()}
-      </Badge>
-    )
-  }
-
-  private toggle = () => {
-    this.setState({ collapsed: !this.state.collapsed })
-  }
-}
-
-const styles = (theme: Theme) => ({
-  badge: { top: '-8px', left:'64px' },
-})
-
-export default withStyles(styles)(MessageHistory)

app/src/components/Sidebar/HistoryDrawer.tsx

@@ -0,0 +1,111 @@
+import * as React from 'react'
+import { Badge, Typography } from '@material-ui/core'
+import { selectTextWithCtrlA } from '../../utils/handleTextSelectWithCtrlA'
+import { Theme, withStyles } from '@material-ui/core/styles'
+
+interface HistoryItem {
+  key: string
+  title: JSX.Element | string
+  value: string
+  selected?: boolean
+}
+
+interface Props {
+  items: Array<HistoryItem>
+  onClick?: (index: number, element: EventTarget) => void
+  classes: any
+  contentTypeIndicator?: JSX.Element
+  theme: Theme
+}
+
+interface State {
+  collapsed: boolean
+}
+
+class HistoryDrawer extends React.Component<Props, State> {
+  constructor(props: any) {
+    super(props)
+    this.state = {
+      collapsed: true,
+    }
+  }
+
+  private toggle = () => {
+    this.setState({ collapsed: !this.state.collapsed })
+  }
+
+  private createSelectionHandler = (index: number) => (event: React.MouseEvent) => {
+    this.props.onClick && this.props.onClick(index, event.target)
+    event.preventDefault()
+    event.stopPropagation()
+  }
+
+  private handleCtrlA = selectTextWithCtrlA({ targetSelector: 'pre' })
+
+  public renderHistory() {
+    const style = (element: HistoryItem) => ({
+      backgroundColor: element.selected
+        ? this.props.theme.palette.action.selected
+        : this.props.theme.palette.action.hover,
+      margin: '8px',
+      padding: '8px 8px 0 8px',
+      cursor: this.props.onClick ? 'pointer' : 'inherit',
+    })
+
+    const messageStyle: React.CSSProperties = { textOverflow: 'ellipsis', whiteSpace: 'nowrap', overflow: 'hidden' }
+    const elements = this.props.items.map((element, index) => (
+      <div
+        key={element.key}
+        style={style(element)}
+        onClick={this.createSelectionHandler(index)}
+        tabIndex={0}
+        onKeyDown={this.handleCtrlA}
+      >
+        <div>
+          <i>{element.title}</i>
+        </div>
+        <div style={messageStyle}>
+          <span>
+            <pre>{element.value}</pre>
+          </span>
+        </div>
+      </div>
+    ))
+
+    const visible = this.props.items.length > 0 && this.state.collapsed
+
+    return (
+      <div className={this.props.classes.main}>
+        <Typography component={'span'} onClick={this.toggle} style={{ cursor: 'pointer' }}>
+          <Badge
+            classes={{ badge: this.props.classes.badge }}
+            invisible={!visible}
+            badgeContent={this.props.items.length}
+            color="primary"
+          >
+            {this.state.collapsed ? '▶ History' : '▼ History'}
+          </Badge>
+          <div style={{ float: 'right' }}>{this.state.collapsed ? this.props.contentTypeIndicator : null}</div>
+        </Typography>
+        <div style={{ maxHeight: '230px', overflowY: 'scroll' }}>
+          {this.state.collapsed ? null : this.props.children}
+          {this.state.collapsed ? null : elements}
+        </div>
+      </div>
+    )
+  }
+
+  public render() {
+    return <div style={{ display: 'block', width: '100%' }}>{this.renderHistory()}</div>
+  }
+}
+
+const styles = (theme: Theme) => ({
+  main: {
+    backgroundColor: 'rgba(170, 170, 170, 0.2)',
+    marginTop: '16px',
+  },
+  badge: { right: '-25px' },
+})
+
+export default withStyles(styles, { withTheme: true })(HistoryDrawer)

app/src/components/Sidebar/MessageHistory.tsx

@@ -1,74 +0,0 @@
-import * as React from 'react'
-import * as q from '../../../../backend/src/Model'
-
-import { Theme, withTheme } from '@material-ui/core/styles'
-
-import Fade from '@material-ui/core/Fade'
-import History from './History'
-import Paper from '@material-ui/core/Paper'
-import Popper from '@material-ui/core/Popper'
-import ValueRenderer from './ValueRenderer'
-
-interface Props {
-  node?: q.TreeNode
-  theme: Theme
-  onSelect: (message: q.Message) => void
-}
-
-interface State {
-  displayMessage?: q.Message,
-  anchorEl?: HTMLElement
-}
-
-class MessageHistory extends React.Component<Props, State> {
-  constructor(props: any) {
-    super(props)
-    this.state = { }
-  }
-
-  private updateNode = () => {
-    this.setState(this.state)
-  }
-
-  public componentWillReceiveProps(nextProps: Props) {
-    this.props.node && this.props.node.onMessage.unsubscribe(this.updateNode)
-    nextProps.node && nextProps.node.onMessage.subscribe(this.updateNode)
-  }
-
-  public componentWillMount() {
-    this.props.node && this.props.node.onMessage.subscribe(this.updateNode)
-  }
-
-  public componentWillUnMount() {
-    this.props.node && this.props.node.onMessage.unsubscribe(this.updateNode)
-  }
-
-  public render() {
-    const { node } = this.props
-    if (!node) {
-      return null
-    }
-
-    const history = node.messageHistory.toArray()
-    const historyElements = history.map(message => ({
-      title: message.received.toGMTString(),
-      value: message.value,
-    }))
-
-    return (
-      <div>
-        <History
-          items={historyElements}
-          onClick={this.displayMessage}
-        />
-      </div>
-    )
-  }
-
-  private displayMessage = (index: number, eventTarget: EventTarget) => {
-    const message = this.props.node && this.props.node.messageHistory.toArray()[index]
-    this.props.onSelect(message)
-  }
-}
-
-export default withTheme()(MessageHistory)

app/src/components/Sidebar/NodeStats.tsx

@@ -1,9 +1,10 @@
-import * as React from 'react'
 import * as q from '../../../../backend/src/Model'
+import * as React from 'react'
+import { TopicViewModel } from '../../model/TopicViewModel'
 import { Typography } from '@material-ui/core'
 
 interface Props {
-  node: q.TreeNode
+  node?: q.TreeNode<TopicViewModel>
 }
 
 class NodeStats extends React.Component<Props, {}> {
@@ -13,11 +14,14 @@ class NodeStats extends React.Component<Props, {}> {
 
   public render() {
     const { node } = this.props
+    if (!node) {
+      return null
+    }
 
     return (
       <div>
         <Typography>Messages: #{node.messages}</Typography>
-        <Typography>Subtopics: {node.leafCount()}</Typography>
+        <Typography>Subtopics: {node.childTopicCount()}</Typography>
         <Typography>Messages Subtopics: #{node.leafMessageCount()}</Typography>
       </div>
     )

app/src/components/Sidebar/Panel.tsx

@@ -0,0 +1,33 @@
+import React from 'react'
+import ExpandMore from '@material-ui/icons/ExpandMore'
+import { ExpansionPanel, ExpansionPanelDetails, ExpansionPanelSummary, Typography, Theme } from '@material-ui/core'
+import { withStyles } from '@material-ui/styles'
+
+const styles = (theme: Theme) => ({
+  summary: { minHeight: '0' },
+  details: { padding: '0px 16px 8px 8px', display: 'block' },
+  heading: {
+    fontSize: theme.typography.pxToRem(15),
+    fontWeight: theme.typography.fontWeightRegular,
+  },
+})
+
+const Panel = (props: {
+  classes: any
+  children: [React.ReactElement, React.ReactElement]
+  disabled?: boolean
+  detailsHidden?: boolean
+}) => {
+  return (
+    <ExpansionPanel defaultExpanded={true} disabled={props.disabled}>
+      <ExpansionPanelSummary expandIcon={<ExpandMore />} className={props.classes.summary}>
+        <Typography className={props.classes.heading}>{props.children[0]}</Typography>
+      </ExpansionPanelSummary>
+      {props.detailsHidden ? null : (
+        <ExpansionPanelDetails className={props.classes.detail}>{props.children[1]}</ExpansionPanelDetails>
+      )}
+    </ExpansionPanel>
+  )
+}
+
+export default withStyles(styles)(Panel)

app/src/components/Sidebar/PlotHistory.tsx

@@ -0,0 +1,119 @@
+import * as React from 'react'
+import DateFormatter from '../helper/DateFormatter'
+import { default as ReactResizeDetector } from 'react-resize-detector'
+import { PlotCurveTypes } from '../../reducers/Charts'
+import { Theme, withTheme } from '@material-ui/core'
+import 'react-vis/dist/style.css'
+const { XYPlot, LineMarkSeries, Hint, XAxis, YAxis, HorizontalGridLines } = require('react-vis')
+const abbreviate = require('number-abbreviate')
+
+interface Props {
+  data: Array<{ x: number; y: number }>
+  theme: Theme
+  interpolation?: PlotCurveTypes
+  range?: [number?, number?]
+  timeRangeStart?: number
+  color?: string
+}
+
+function mapCurveType(type: PlotCurveTypes | undefined) {
+  switch (type) {
+    case 'curve':
+      return 'curveMonotoneX'
+    case 'linear':
+      return 'curveLinear'
+    case 'cubic_basis_spline':
+      return 'curveBasis'
+    case 'step_after':
+      return 'curveStepAfter'
+    case 'step_before':
+      return 'curveStepBefore'
+    default:
+      return 'curveMonotoneX'
+  }
+}
+
+export default withTheme((props: Props) => {
+  const [width, setWidth] = React.useState(300)
+  const [tooltip, setTooltip] = React.useState({ value: undefined })
+  const detectResize = React.useCallback(newWidth => setWidth(newWidth), [])
+
+  const hintFormatter = React.useCallback((point: any) => {
+    return [
+      { title: <b>Time</b>, value: <DateFormatter date={new Date(point.x)} /> },
+      { title: <b>Value</b>, value: point.y },
+    ]
+  }, [])
+
+  const hideTooltip = React.useCallback(() => {
+    setTooltip({ value: undefined })
+  }, [])
+
+  const showTooltip = React.useCallback((value: any) => {
+    setTooltip({ value })
+  }, [])
+
+  return React.useMemo(() => {
+    const data = props.data
+    const calculatedDomain = domainForData(data)
+    const yDomain: [number, number] = props.range
+      ? [props.range[0] || calculatedDomain[0], props.range[1] || calculatedDomain[1]]
+      : calculatedDomain
+
+    const xDomain = props.timeRangeStart ? [Date.now() - props.timeRangeStart, Date.now()] : undefined
+
+    let color: string =
+      props.theme.palette.type === 'light' ? props.theme.palette.secondary.dark : props.theme.palette.primary.light
+    if (props.color) {
+      color = props.color
+    }
+
+    return (
+      <div style={{ height: '150px', overflow: 'hidden' }}>
+        <XYPlot width={width} height={180} yDomain={yDomain} xDomain={xDomain}>
+          <HorizontalGridLines />
+          <XAxis />
+          <YAxis width={45} tickFormat={(num: number) => abbreviate(num)} />
+          <LineMarkSeries
+            color={color}
+            onValueMouseOver={showTooltip}
+            onValueMouseOut={hideTooltip}
+            size={3}
+            data={data}
+            curve={mapCurveType(props.interpolation)}
+          />
+          {tooltip.value ? <Hint format={hintFormatter} value={tooltip.value} /> : null}
+        </XYPlot>
+        <ReactResizeDetector handleWidth={true} onResize={detectResize} />
+      </div>
+    )
+  }, [width, props.data, tooltip, props.interpolation, props.range, props.color, props.theme])
+})
+
+function domainForData(data: Array<{ x: number; y: number }>): [number, number] {
+  if (!data[0]) {
+    const defaultDomain: [number, number] = [-1, 1]
+    return defaultDomain
+  }
+
+  let max = data[0].y
+  let min = data[0].y
+  data.forEach(d => {
+    if (max < d.y) {
+      max = d.y
+    }
+    if (min > d.y) {
+      min = d.y
+    }
+  })
+
+  if ((max === 1 || max === 0) && (min === 1 || min === 0)) {
+    return [0, 1]
+  }
+
+  if (min === max) {
+    return [min - 0.5 * min, min + 0.5 * min]
+  }
+
+  return [min, max]
+}

app/src/components/Sidebar/Publish/Editor.tsx

@@ -0,0 +1,39 @@
+import * as React from 'react'
+import { default as AceEditor } from 'react-ace'
+import { Theme, withTheme } from '@material-ui/core'
+import 'brace/mode/json'
+import 'brace/theme/dawn'
+import 'brace/theme/monokai'
+import 'brace/mode/xml'
+import 'brace/mode/text'
+import 'react-ace'
+
+function Editor(props: {
+  editorMode: string
+  theme: Theme
+  value: string | undefined
+  onChange: (value: string) => void
+}) {
+  const editorOptions = {
+    showLineNumbers: false,
+    tabSize: 2,
+  }
+
+  return (
+    <AceEditor
+      style={{}}
+      mode={props.editorMode}
+      theme={props.theme.palette.type === 'dark' ? 'monokai' : 'dawn'}
+      name="UNIQUE_ID_OF_DIV"
+      width="100%"
+      height="200px"
+      showGutter={true}
+      value={props.value}
+      onChange={props.onChange}
+      setOptions={editorOptions}
+      editorProps={{ $blockScrolling: true }}
+    />
+  )
+}
+
+export default withTheme(Editor)

app/src/components/Sidebar/Publish/EditorModeSelect.tsx

@@ -0,0 +1,40 @@
+import * as React from 'react'
+import { FormControlLabel, Radio, RadioGroup } from '@material-ui/core'
+
+interface Props {
+  value: string
+  onChange: (event: React.ChangeEvent<{}>, value: string) => void
+}
+export function EditorModeSelect(props: Props) {
+  const labelStyle = { margin: '0 8px 0 8px' }
+  return (
+    <RadioGroup
+      style={{ display: 'inline-block', float: 'left' }}
+      value={props.value}
+      onChange={props.onChange}
+      row={true}
+    >
+      <FormControlLabel
+        value="text"
+        style={labelStyle}
+        control={<Radio color="primary" />}
+        label="raw"
+        labelPlacement="top"
+      />
+      <FormControlLabel
+        value="xml"
+        style={labelStyle}
+        control={<Radio color="primary" />}
+        label="xml"
+        labelPlacement="top"
+      />
+      <FormControlLabel
+        value="json"
+        style={labelStyle}
+        control={<Radio color="primary" />}
+        label="json"
+        labelPlacement="top"
+      />
+    </RadioGroup>
+  )
+}

app/src/components/Sidebar/Publish/Publish.tsx

@@ -1,237 +1,171 @@
-// tslint:disable-next-line
-import 'react-ace'
-import 'brace/mode/json'
-import 'brace/mode/text'
-import 'brace/mode/xml'
-import 'brace/theme/monokai'
-
-import * as React from 'react'
-import * as brace from 'brace'
-import * as q from '../../../../../backend/src/Model'
-
-import {
-  Button,
-  Fab,
-  FormControlLabel,
-  InputAdornment,
-  Radio,
-  RadioGroup,
-  TextField,
-  Typography,
-} from '@material-ui/core'
-import { makePublishEvent, rendererEvents } from '../../../../../events'
-
-import { default as AceEditor } from 'react-ace'
-import { AppState } from '../../../reducers'
-import History from '../History'
+import Editor from './Editor'
+import FormatAlignLeft from '@material-ui/icons/FormatAlignLeft'
 import Message from './Model/Message'
 import Navigation from '@material-ui/icons/Navigation'
+import PublishHistory from './PublishHistory'
+import React, { useCallback, useState, useMemo } from 'react'
+import TopicInput from './TopicInput'
+import { AppState } from '../../../reducers'
 import { bindActionCreators } from 'redux'
+import { Button, Fab, Theme, Tooltip, withTheme } from '@material-ui/core'
 import { connect } from 'react-redux'
-import { sidebarActions } from '../../../actions'
+import { EditorModeSelect } from './EditorModeSelect'
+import { globalActions, publishActions } from '../../../actions'
+import { KeyCodes } from '../../../utils/KeyCodes'
+import RetainSwitch from './RetainSwitch'
 
 interface Props {
-  node?: q.TreeNode
   connectionId?: string
   topic?: string
   payload?: string
-  actions: any
+  actions: typeof publishActions
+  globalActions: typeof globalActions
+  retain: boolean
+  editorMode: string
+  theme: Theme
 }
 
-interface State {
-  mode: string
-  history: Message[]
+function useHistory(): [Array<Message>, (topic: string, payload?: string) => void] {
+  const [history, setHistory] = useState<Array<Message>>([])
+  const amendToHistory = useCallback(
+    (topic: string, payload?: string) => {
+      // Remove duplicates
+      let filteredHistory = history.filter(e => e.payload !== payload || e.topic !== topic)
+      filteredHistory = filteredHistory.slice(-7)
+      setHistory([...filteredHistory, { topic, payload, sent: new Date() }])
+    },
+    [history]
+  )
+
+  return [history, amendToHistory]
 }
 
-class Publish extends React.Component<Props, State> {
-  constructor(props: any) {
-    super(props)
-    this.state = { mode: 'json', history: [] }
-  }
+function Publish(props: Props) {
+  console.log(props.connectionId)
+  const updatePayload = props.actions.setPayload
+  const [history, amendToHistory] = useHistory()
 
-  private updatePayload = (value: string, event?: any) => {
-    this.props.actions.setPublishPayload(value)
-  }
+  const updateMode = useCallback((e: React.ChangeEvent<{}>, value: string) => {
+    props.actions.setEditorMode(value)
+  }, [])
 
-  private updateTopic = (e: React.ChangeEvent<HTMLInputElement>) => {
-    console.log(e.target.value)
-    this.props.actions.setPublishTopic(e.target.value)
-  }
-
-  private updateMode = (e: React.ChangeEvent<{}>, value: string) => {
-    this.setState({ mode: value })
-  }
-
-  private publish = (e: React.MouseEvent) => {
-    e.stopPropagation()
-    const topic = this.currentTopic() || ''
-    const payload = this.props.payload
-
-    if (this.props.connectionId && topic) {
-      rendererEvents.emit(makePublishEvent(this.props.connectionId), { topic, payload })
-      this.addMessageToHistory(topic, payload)
+  const publish = useCallback(() => {
+    if (!props.connectionId) {
+      return
     }
-  }
 
-  private addMessageToHistory(topic: string, payload?: string) {
-    // Remove duplicates
-    let filteredHistory = this.state.history.filter(e => e.payload !== payload || e.topic !== topic)
-    filteredHistory = filteredHistory.slice(-7)
-    const history: Message[] = [...filteredHistory, { topic, payload, sent: new Date() }]
-    this.setState({ history })
-  }
+    props.actions.publish(props.connectionId)
 
-  public render() {
-    return (
-      <div style={{ flexGrow: 1, marginLeft: '8px' }}>
-        {this.topic()}
-        {this.editor()}
-        {this.history()}
-      </div>
-    )
-  }
-
-  private currentTopic(): string | undefined {
-    const { node, topic } = this.props
-    const selectedNodePath = (node ? node.path() : undefined)
-
-    return (topic !== undefined) ? topic : selectedNodePath
-  }
-
-  private topic() {
-    const topicStr = this.currentTopic() || ''
-
-    return (
-      <div>
-        <Typography>Topic</Typography>
-        <TextField
-          placeholder="example/topic"
-          style={{ width: '100%' }}
-          margin="normal"
-          value={topicStr}
-          multiline={true}
-          onChange={this.updateTopic}
-          InputProps={{ onBlur: this.onTopicBlur }}
-        />
-      </div>
-    )
-  }
-
-  private onTopicBlur = (e: React.FocusEvent<HTMLInputElement>) => {
-    if (!e.target.value) {
-      this.props.actions.setPublishTopic(undefined)
+    const topic = props.topic || ''
+    const payload = props.payload
+    if (props.connectionId && topic) {
+      amendToHistory(topic, payload)
     }
-  }
+  }, [props, props.connectionId, props.topic, props.payload, amendToHistory])
 
-  private editorOptions = {
-    enableBasicAutocompletion: true,
-    enableLiveAutocompletion: true,
-    enableSnippets: true,
-    showLineNumbers: false,
-    tabSize: 2,
-  }
+  const handleClickPublish = useCallback(
+    (e: React.MouseEvent) => {
+      e.stopPropagation()
+      publish()
+    },
+    [publish]
+  )
 
-  private publishButton() {
+  const PublishButton = () => {
     return (
-      <Button
-        variant="contained"
-        size="small"
-        color="primary"
-        onClick={this.publish}
-      >
+      <Button variant="contained" size="small" color="primary" onClick={handleClickPublish} id="publish-button">
         <Navigation style={{ marginRight: '8px' }} /> Publish
       </Button>
     )
   }
 
-  private editorMode() {
-    const labelStyle = { margin: '0 8px 0 8px' }
+  const formatJson = () => {
+    if (props.payload) {
+      try {
+        const str = JSON.stringify(JSON.parse(props.payload), undefined, '  ')
+        updatePayload(str)
+      } catch (error) {
+        props.globalActions.showError(`Format error: ${error.message}`)
+      }
+    }
+  }
+
+  const renderFormatJson = () => {
+    if (props.editorMode !== 'json') {
+      return null
+    }
+
+    return (
+      <Tooltip title="Format JSON">
+        <Fab
+          style={{ width: '36px', height: '36px', marginLeft: '8px' }}
+          onClick={formatJson}
+          id="sidebar-publish-format-json"
+        >
+          <FormatAlignLeft style={{ fontSize: '20px' }} />
+        </Fab>
+      </Tooltip>
+    )
+  }
+
+  function EditorMode() {
     return (
       <div style={{ marginTop: '16px' }}>
         <div style={{ width: '100%', lineHeight: '64px' }}>
-          <RadioGroup
-            style={{ display: 'inline-block', float: 'left' }}
-            value={this.state.mode}
-            onChange={this.updateMode}
-            row={true}
-          >
-            <FormControlLabel
-              value="text"
-              style={labelStyle}
-              control={<Radio color="primary" />}
-              label="raw"
-              labelPlacement="top"
-            />
-            <FormControlLabel
-              value="xml"
-              style={labelStyle}
-              control={<Radio color="primary" />}
-              label="xml"
-              labelPlacement="top"
-            />
-            <FormControlLabel
-              value="json"
-              style={labelStyle}
-              control={<Radio color="primary" />}
-              label="json"
-              labelPlacement="top"
-            />
-          </RadioGroup>
+          <EditorModeSelect value={props.editorMode} onChange={updateMode} />
+          {renderFormatJson()}
           <div style={{ float: 'right', marginRight: '16px' }}>
-            {this.publishButton()}
+            <PublishButton />
           </div>
         </div>
       </div>
     )
   }
 
-  private history() {
-    const items = this.state.history.map(message => ({
-      title: message.topic,
-      value: message.payload,
-    }))
+  const handleSubmit = useCallback(
+    (e: React.KeyboardEvent) => {
+      if (e.keyCode === KeyCodes.enter && (e.metaKey || e.ctrlKey)) {
+        e.preventDefault()
+        e.stopPropagation()
+        publish()
+      }
+    },
+    [publish]
+  )
 
-    return <History items={items} onClick={this.didSelectHistoryEntry} />
-  }
-
-  private didSelectHistoryEntry = (index: number) => {
-    let message = this.state.history[index]
-    this.props.actions.setPublishTopic(message.topic)
-    this.props.actions.setPublishPayload(message.payload)
-  }
-
-  private editor() {
-    return (
-      <div style={{ width: '100%', display: 'block' }}>
-        {this.editorMode()}
-        <AceEditor
-          mode={this.state.mode}
-          theme="monokai"
-          name="UNIQUE_ID_OF_DIV"
-          width="100%"
-          height="200px"
-          showGutter={true}
-          value={this.props.payload}
-          onChange={this.updatePayload}
-          setOptions={this.editorOptions}
-          editorProps={{ $blockScrolling: true }}
-        />
+  return useMemo(
+    () => (
+      <div style={{ flexGrow: 1, marginLeft: '8px' }} onKeyDown={handleSubmit}>
+        <TopicInput />
+        <div style={{ width: '100%', display: 'block' }}>
+          <EditorMode />
+          <Editor value={props.payload} editorMode={props.editorMode} onChange={updatePayload} />
+          <RetainSwitch />
+        </div>
+        <PublishHistory history={history} />
       </div>
-    )
-  }
+    ),
+    [props.payload, props.editorMode, history, handleSubmit, updatePayload]
+  )
 }
 
 const mapDispatchToProps = (dispatch: any) => {
   return {
-    actions: bindActionCreators(sidebarActions, dispatch),
+    actions: bindActionCreators(publishActions, dispatch),
+    globalActions: bindActionCreators(globalActions, dispatch),
   }
 }
 
 const mapStateToProps = (state: AppState) => {
   return {
-    topic: state.sidebar.publishTopic,
-    payload: state.sidebar.publishPayload,
+    topic: state.publish.topic,
+    payload: state.publish.payload,
+    editorMode: state.publish.editorMode,
+    retain: state.publish.retain,
   }
 }
 
-export default connect(mapStateToProps, mapDispatchToProps)(Publish)
+export default connect(
+  mapStateToProps,
+  mapDispatchToProps
+)(withTheme(Publish))

app/src/components/Sidebar/Publish/PublishHistory.tsx

@@ -0,0 +1,40 @@
+import History from '../HistoryDrawer'
+import Message from './Model/Message'
+import React, { useCallback, useMemo } from 'react'
+import { bindActionCreators } from 'redux'
+import { connect } from 'react-redux'
+import { publishActions } from '../../../actions'
+const sha1 = require('sha1')
+
+function PublishHistory(props: { history: Array<Message>; actions: typeof publishActions }) {
+  const didSelectHistoryEntry = useCallback(
+    (index: number) => {
+      const items = [...props.history].reverse()
+      const message = items[index]
+      props.actions.setTopic(message.topic)
+      props.actions.setPayload(message.payload)
+    },
+    [props.history]
+  )
+
+  return useMemo(() => {
+    const items = [...props.history].reverse().map(message => ({
+      key: sha1(message.topic + message.payload),
+      title: message.topic,
+      value: message.payload || '',
+    }))
+
+    return <History items={items} onClick={didSelectHistoryEntry} />
+  }, [props.history])
+}
+
+const mapDispatchToProps = (dispatch: any) => {
+  return {
+    actions: bindActionCreators(publishActions, dispatch),
+  }
+}
+
+export default connect(
+  undefined,
+  mapDispatchToProps
+)(PublishHistory)

app/src/components/Sidebar/Publish/QosSelect.tsx

@@ -0,0 +1,75 @@
+import * as React from 'react'
+import { TextField, MenuItem, Tooltip } from '@material-ui/core'
+import { connect } from 'react-redux'
+import { AppState } from '../../../reducers'
+import { bindActionCreators } from 'redux'
+import { publishActions } from '../../../actions'
+
+interface Props {
+  qos: 0 | 1 | 2
+  actions: {
+    publish: typeof publishActions
+  }
+}
+
+function QosSelect(props: Props) {
+  const tooltipStyle = { textAlign: 'center' as 'center', width: '100%' }
+  const itemStyle = { padding: '0' }
+
+  const onChangeQos = React.useCallback(
+    (event: React.ChangeEvent<HTMLInputElement>) => {
+      const value = parseInt(event.target.value, 10)
+      if (value !== 0 && value !== 1 && value !== 2) {
+        return
+      }
+
+      props.actions.publish.setQoS(value)
+    },
+    [props.actions.publish]
+  )
+
+  return (
+    <TextField
+      select={true}
+      value={props.qos}
+      margin="normal"
+      style={{ margin: '8px 0 8px 8px' }}
+      onChange={onChangeQos}
+    >
+      <MenuItem key={0} value={0} style={itemStyle}>
+        <Tooltip title="At most once">
+          <div style={tooltipStyle}>0</div>
+        </Tooltip>
+      </MenuItem>
+      <MenuItem key={1} value={1} style={itemStyle}>
+        <Tooltip title="At least once">
+          <div style={tooltipStyle}>1</div>
+        </Tooltip>
+      </MenuItem>
+      <MenuItem key={2} value={2} style={itemStyle}>
+        <Tooltip title="Exactly once">
+          <div style={tooltipStyle}>2</div>
+        </Tooltip>
+      </MenuItem>
+    </TextField>
+  )
+}
+
+const mapDispatchToProps = (dispatch: any) => {
+  return {
+    actions: {
+      publish: bindActionCreators(publishActions, dispatch),
+    },
+  }
+}
+
+const mapStateToProps = (state: AppState) => {
+  return {
+    qos: state.publish.qos,
+  }
+}
+
+export default connect(
+  mapStateToProps,
+  mapDispatchToProps
+)(QosSelect)

app/src/components/Sidebar/Publish/RetainSwitch.tsx

@@ -0,0 +1,47 @@
+import QosSelect from './QosSelect'
+import React from 'react'
+import { Checkbox, FormControlLabel, Tooltip } from '@material-ui/core'
+import { publishActions } from '../../../actions'
+import { bindActionCreators } from 'redux'
+import { AppState } from '../../../reducers'
+import { connect } from 'react-redux'
+
+export function RetainSwitch(props: { retain: boolean; actions: typeof publishActions }) {
+  const labelStyle = { margin: '0 8px 0 8px' }
+  return (
+    <div style={{ marginTop: '8px', clear: 'both' }}>
+      <div style={{ width: '100%', textAlign: 'right' }}>
+        <FormControlLabel style={labelStyle} control={<QosSelect />} label="QoS" labelPlacement="start" />
+        <Tooltip
+          title="Retained messages only appear to be retained, when client subscribes after the initial publish."
+          placement="top"
+        >
+          <FormControlLabel
+            value="retain"
+            style={labelStyle}
+            control={<Checkbox color="primary" checked={props.retain} onChange={props.actions.toggleRetain} />}
+            label="retain"
+            labelPlacement="end"
+          />
+        </Tooltip>
+      </div>
+    </div>
+  )
+}
+
+const mapDispatchToProps = (dispatch: any) => {
+  return {
+    actions: bindActionCreators(publishActions, dispatch),
+  }
+}
+
+const mapStateToProps = (state: AppState) => {
+  return {
+    retain: state.publish.retain,
+  }
+}
+
+export default connect(
+  mapStateToProps,
+  mapDispatchToProps
+)(RetainSwitch)

app/src/components/Sidebar/Publish/TopicInput.tsx

@@ -0,0 +1,60 @@
+import ClearAdornment from '../../helper/ClearAdornment'
+import React, { useCallback } from 'react'
+import { FormControl, Input, InputLabel } from '@material-ui/core'
+import { publishActions } from '../../../actions'
+import { bindActionCreators } from 'redux'
+import { AppState } from '../../../reducers'
+import { connect } from 'react-redux'
+
+function TopicInput(props: { actions: typeof publishActions; topic?: string }) {
+  console.log(props.topic)
+  const updateTopic = useCallback((e: React.ChangeEvent<HTMLInputElement>) => {
+    props.actions.setTopic(e.target.value)
+  }, [])
+
+  const clearTopic = useCallback(() => {
+    props.actions.setTopic('')
+  }, [])
+
+  const onTopicBlur = useCallback((e: React.FocusEvent<HTMLInputElement>) => {
+    if (!e.target.value) {
+      props.actions.setTopic(undefined)
+    }
+  }, [])
+
+  const topicStr = props.topic || ''
+  return (
+    <div>
+      <FormControl style={{ width: '100%' }}>
+        <InputLabel htmlFor="publish-topic">Topic</InputLabel>
+        <Input
+          id="publish-topic"
+          value={topicStr}
+          startAdornment={<span />}
+          endAdornment={<ClearAdornment action={clearTopic} value={topicStr} />}
+          onBlur={onTopicBlur}
+          onChange={updateTopic}
+          multiline={true}
+          placeholder="example/topic"
+        />
+      </FormControl>
+    </div>
+  )
+}
+
+const mapDispatchToProps = (dispatch: any) => {
+  return {
+    actions: bindActionCreators(publishActions, dispatch),
+  }
+}
+
+const mapStateToProps = (state: AppState) => {
+  return {
+    topic: state.publish.topic,
+  }
+}
+
+export default connect(
+  mapStateToProps,
+  mapDispatchToProps
+)(TopicInput)

app/src/components/Sidebar/Sidebar.tsx

@@ -1,174 +1,105 @@
-import * as React from 'react'
 import * as q from '../../../../backend/src/Model'
-
-import {
-  ExpansionPanel,
-  ExpansionPanelDetails,
-  ExpansionPanelSummary,
-  Fade,
-  Paper,
-  Popper,
-  Typography,
-} from '@material-ui/core'
-import { StyleRulesCallback, Theme, withStyles } from '@material-ui/core/styles'
-
-import { AppState } from '../../reducers'
-import Copy from '../Copy'
+import React, { useState, useEffect, useCallback } from 'react'
 import ExpandMore from '@material-ui/icons/ExpandMore'
-import MessageHistory from './MessageHistory'
 import NodeStats from './NodeStats'
-import Publish from './Publish/Publish'
-import Topic from './Topic'
-import ValueRenderer from './ValueRenderer'
+import ValuePanel from './ValueRenderer/ValuePanel'
+import { AppState } from '../../reducers'
+import { Badge, ExpansionPanel, ExpansionPanelDetails, ExpansionPanelSummary, Typography } from '@material-ui/core'
+import { bindActionCreators } from 'redux'
 import { connect } from 'react-redux'
+import { settingsActions, sidebarActions } from '../../actions'
+import { Theme, withStyles } from '@material-ui/core/styles'
+import { TopicViewModel } from '../../model/TopicViewModel'
+import TopicPanel from './TopicPanel/TopicPanel'
+import Panel from './Panel'
+
+const throttle = require('lodash.throttle')
+
+const Publish = React.lazy(() => import('./Publish/Publish'))
 
 interface Props {
-  node?: q.TreeNode,
-  classes: any,
-  theme: Theme,
-  connectionId?: string,
+  node?: q.TreeNode<TopicViewModel>
+  actions: typeof sidebarActions
+  settingsActions: typeof settingsActions
+  classes: any
+  connectionId?: string
 }
 
-interface State {
-  node: q.TreeNode,
-  compareMessage?: q.Message
-}
+function Sidebar(props: Props) {
+  const { classes, node } = props
+  const [lastUpdate, setLastUpdate] = useState(0)
 
-class Sidebar extends React.Component<Props, State> {
-  private valueRef: any = React.createRef<HTMLDivElement>()
-  private updateNode = () => {
-    this.setState(this.state)
-  }
+  const updateNode = useCallback(
+    throttle(() => {
+      setLastUpdate(node ? node.lastUpdate : 0)
+    }, 300),
+    [node]
+  )
 
-  constructor(props: any) {
-    super(props)
-    console.error('Find and fix me #state')
-    this.state = { node: new q.Tree() }
-  }
+  useEffect(() => {
+    const updateCallback = updateNode
+    node && node.onMerge.subscribe(updateCallback)
+    node && node.onMessage.subscribe(updateCallback)
 
-  public static styles: StyleRulesCallback<string> = (theme: Theme) => {
-    return {
-      drawer: {
-        display: 'block',
-        height: '100%',
-      },
-      valuePaper: {
-        margin: `${theme.spacing.unit}px ${theme.spacing.unit}px ${theme.spacing.unit}px ${theme.spacing.unit}px`,
-      },
-      heading: {
-        fontSize: theme.typography.pxToRem(15),
-        fontWeight: theme.typography.fontWeightRegular,
-      },
+    return function cleanup() {
+      node && node.onMerge.unsubscribe(updateCallback)
+      node && node.onMessage.unsubscribe(updateCallback)
     }
-  }
+  }, [node])
 
-  public componentWillReceiveProps(nextProps: Props) {
-    this.props.node && this.removeUpdateListener(this.props.node)
-    nextProps.node && this.registerUpdateListener(nextProps.node)
-    this.props.node && this.setState({ node: this.props.node })
-
-    if (this.props.node !== nextProps.node) {
-      this.setState({ compareMessage: undefined })
-    }
-  }
-
-  private registerUpdateListener(node: q.TreeNode) {
-    node.onMerge.subscribe(this.updateNode)
-    node.onMessage.subscribe(this.updateNode)
-  }
-
-  private removeUpdateListener(node: q.TreeNode) {
-    node.onMerge.unsubscribe(this.updateNode)
-    node.onMessage.unsubscribe(this.updateNode)
-  }
-
-  public render() {
-    return (
-      <div className={this.props.classes.drawer}>
-        {this.renderNode()}
-      </div>
-    )
-  }
-
-  private detailsStyle = { padding: '0px 16px 8px 8px', display: 'block' }
-
-  private renderNode() {
-    const { classes, node } = this.props
-
-    const copyTopic = node ? <Copy value={node.path()} /> : null
-    const copyValue = node && node.message ? <Copy value={node.message.value} /> : null
-    const summeryStyle = { minHeight: '0' }
-    return (
+  return (
+    <div id="Sidebar" className={props.classes.drawer}>
       <div>
-        <ExpansionPanel key="topic" defaultExpanded={true} disabled={!Boolean(this.props.node)}>
-          <ExpansionPanelSummary expandIcon={<ExpandMore />} style={summeryStyle}>
-            <Typography className={classes.heading}>Topic {copyTopic}</Typography>
-          </ExpansionPanelSummary>
-          <ExpansionPanelDetails style={this.detailsStyle}>
-            <Topic node={this.props.node} didSelectNode={this.updateNode} />
+        <TopicPanel node={node} updateNode={updateNode} />
+        <ValuePanel lastUpdate={node ? node.lastUpdate : 0} />
+        <Panel>
+          <span>Publish</span>
+          <React.Suspense fallback={<div>Loading...</div>}>
+            <Publish connectionId={props.connectionId} />
+          </React.Suspense>
+        </Panel>
+        <Panel detailsHidden={!node}>
+          <span>Stats</span>
+          <ExpansionPanelDetails className={props.classes.details}>
+            <NodeStats node={node} />
           </ExpansionPanelDetails>
-        </ExpansionPanel>
-        <ExpansionPanel key="value" defaultExpanded={true}>
-          <ExpansionPanelSummary expandIcon={<ExpandMore />} style={summeryStyle}>
-            <Typography className={classes.heading}>Value {copyValue}</Typography>
-          </ExpansionPanelSummary>
-          <ExpansionPanelDetails style={this.detailsStyle}>
-            <div ref={this.valueRef}><ValueRenderer message={this.props.node && this.props.node.message} /></div>
-            <div><MessageHistory onSelect={this.handleMessageHistorySelect} node={this.props.node} /></div>
-            <Popper open={Boolean(this.state.compareMessage)} anchorEl={this.valueRef.current} placement="left" transition={true}>
-              {({ TransitionProps }) => (
-                <Fade {...TransitionProps} timeout={350}>
-                  <Paper>
-                    <ValueRenderer message={this.state.compareMessage} />
-                  </Paper>
-                </Fade>
-              )}
-            </Popper>
-          </ExpansionPanelDetails>
-        </ExpansionPanel>
-        <ExpansionPanel defaultExpanded={true}>
-          <ExpansionPanelSummary expandIcon={<ExpandMore />} style={summeryStyle}>
-            <Typography className={classes.heading}>Publish</Typography>
-          </ExpansionPanelSummary>
-          <ExpansionPanelDetails style={this.detailsStyle}>
-            <Publish node={this.props.node} connectionId={this.props.connectionId} />
-          </ExpansionPanelDetails>
-        </ExpansionPanel>
-        <ExpansionPanel defaultExpanded={Boolean(this.props.node)}>
-          <ExpansionPanelSummary expandIcon={<ExpandMore />} style={summeryStyle}>
-            <Typography className={classes.heading}>Stats</Typography>
-          </ExpansionPanelSummary>
-          {this.renderNodeStats()}
-        </ExpansionPanel>
+        </Panel>
       </div>
-    )
-  }
-
-  private handleMessageHistorySelect = (message: q.Message) => {
-    if (message !== this.state.compareMessage) {
-      this.setState({ compareMessage: message })
-    } else {
-      this.setState({ compareMessage: undefined })
-    }
-  }
-
-  private renderNodeStats() {
-    if (!this.props.node) {
-      return null
-    }
-
-    return (
-      <ExpansionPanelDetails style={this.detailsStyle}>
-        <NodeStats node={this.props.node} />
-      </ExpansionPanelDetails>
-    )
-  }
+    </div>
+  )
 }
 
 const mapStateToProps = (state: AppState) => {
   return {
-    node: state.selectedTopic,
+    node: state.tree.get('selectedTopic'),
   }
 }
 
-export default withStyles(Sidebar.styles, { withTheme: true })(connect(mapStateToProps)(Sidebar))
+const mapDispatchToProps = (dispatch: any) => {
+  return {
+    actions: bindActionCreators(sidebarActions, dispatch),
+    settingsActions: bindActionCreators(settingsActions, dispatch),
+  }
+}
+
+const styles = (theme: Theme) => ({
+  drawer: {
+    display: 'block' as 'block',
+  },
+  valuePaper: {
+    margin: theme.spacing(1),
+  },
+  summary: { minHeight: '0' },
+  details: { padding: '0px 16px 8px 8px', display: 'block' },
+  heading: {
+    fontSize: theme.typography.pxToRem(15),
+    fontWeight: theme.typography.fontWeightRegular,
+  },
+})
+
+export default withStyles(styles)(
+  connect(
+    mapStateToProps,
+    mapDispatchToProps
+  )(Sidebar)
+)

app/src/components/Sidebar/Topic.tsx

@@ -1,59 +0,0 @@
-import * as React from 'react'
-import * as q from '../../../../backend/src/Model'
-import Button from '@material-ui/core/Button'
-import { withStyles, Theme, StyleRulesCallback } from '@material-ui/core/styles'
-
-interface Props {
-  classes: any
-  theme: Theme
-  node?: q.TreeNode
-  selected?: q.TreeNode
-  didSelectNode: (node: q.TreeNode) => void
-}
-
-const styles: StyleRulesCallback<string> = (theme: Theme) => ({
-  button: {
-    textTransform: 'none',
-    padding: '3px 5px 3px 5px',
-    minWidth: '30px',
-  },
-})
-
-class Topic extends React.Component<Props, {}> {
-  public render() {
-    const { node } = this.props
-    if (!node) {
-      return null
-    }
-
-    let key = 0
-    const breadCrumps = node.branch()
-      .map(node => node.sourceEdge)
-      .filter(edge => Boolean(edge))
-      .map(edge =>
-        [(
-          <Button
-            onClick={() => this.setState({ node: edge!.target })}
-            size="small"
-            color="secondary"
-            className={this.props.classes.button}
-            key={edge!.hash()}
-          >
-            {edge!.name}
-          </Button>
-        )],
-      )
-
-    if (breadCrumps.length === 0) {
-      return null
-    }
-
-    const joinedBreadCrumps = breadCrumps.reduce((prev, current) =>
-      prev.concat([<span key={key += 1}>/</span>]).concat(current),
-    )
-
-    return <span style={{ lineHeight: '2.2em' }}>{joinedBreadCrumps}</span>
-  }
-}
-
-export default withStyles(styles, { withTheme: true })(Topic)

app/src/components/Sidebar/TopicPanel/RecursiveTopicDeleteButton.tsx

@@ -0,0 +1,38 @@
+import * as q from '../../../../../backend/src/Model'
+import CustomIconButton from '../../helper/CustomIconButton'
+import Delete from '@material-ui/icons/Delete'
+import React, { useCallback } from 'react'
+import { Badge } from '@material-ui/core'
+
+export const RecursiveTopicDeleteButton = (props: {
+  node?: q.TreeNode<any>
+  deleteTopicAction: (node: q.TreeNode<any>, a: boolean, limit: number) => void
+}) => {
+  const onClick = useCallback(() => {
+    if (props.node) {
+      props.deleteTopicAction(props.node, true, deleteLimit)
+    }
+  }, [props.node])
+  if (!props.node) {
+    return null
+  }
+  const deleteLimit = 50
+  const topicCount = props.node ? props.node.childTopicCount() : 0
+  if (topicCount === 0 || (props.node.message && topicCount === 1)) {
+    return null
+  }
+  return (
+    <Badge
+      style={{
+        top: '3px',
+        right: '3px',
+      }}
+      badgeContent={<span style={{ whiteSpace: 'nowrap' }}>{topicCount >= deleteLimit ? '50+' : topicCount}</span>}
+      color="secondary"
+    >
+      <CustomIconButton onClick={onClick} tooltip={`Deletes up to ${deleteLimit} sub-topics with a single click`}>
+        <Delete style={{ marginTop: '-3px' }} color="action" />
+      </CustomIconButton>
+    </Badge>
+  )
+}

app/src/components/Sidebar/TopicPanel/Topic.tsx

@@ -0,0 +1,73 @@
+import React from 'react'
+import * as q from '../../../../../backend/src/Model'
+import Button from '@material-ui/core/Button'
+import { withStyles, Theme } from '@material-ui/core/styles'
+import { treeActions } from '../../../actions'
+import { bindActionCreators } from 'redux'
+import { connect } from 'react-redux'
+import { TopicViewModel } from '../../../model/TopicViewModel'
+
+interface Props {
+  classes: any
+  theme: Theme
+  node?: q.TreeNode<TopicViewModel>
+  selected?: q.TreeNode<TopicViewModel>
+  actions: typeof treeActions
+  didSelectNode: (node: q.TreeNode<TopicViewModel>) => void
+}
+
+const styles = (theme: Theme) => ({
+  button: {
+    textTransform: 'none' as 'none',
+    padding: '3px 5px 3px 5px',
+    minWidth: '30px',
+  },
+})
+
+class Topic extends React.Component<Props, {}> {
+  public render() {
+    const { node, theme } = this.props
+    if (!node) {
+      return null
+    }
+
+    let key = 0
+    const breadCrumps = node
+      .branch()
+      .map(node => node.sourceEdge)
+      .filter(edge => Boolean(edge))
+      .map(edge => [
+        <Button
+          onClick={() => this.props.actions.selectTopic(edge!.target)}
+          size="small"
+          variant={theme.palette.type === 'light' ? 'contained' : undefined}
+          color={theme.palette.type === 'light' ? 'primary' : 'secondary'}
+          className={this.props.classes.button}
+          key={edge!.hash()}
+        >
+          {edge!.name || <span dangerouslySetInnerHTML={{ __html: '&nbsp;' }} />}
+        </Button>,
+      ])
+
+    if (breadCrumps.length === 0) {
+      return null
+    }
+
+    const joinedBreadCrumps = breadCrumps.reduce((prev, current) =>
+      prev.concat([<span key={(key += 1)}> / </span>]).concat(current)
+    )
+
+    return <span style={{ lineHeight: '2.2em' }}>{joinedBreadCrumps}</span>
+  }
+}
+
+const mapDispatchToProps = (dispatch: any) => {
+  return {
+    actions: bindActionCreators(treeActions, dispatch),
+  }
+}
+
+export default connect(
+  null,
+  mapDispatchToProps
+)(withStyles(styles, { withTheme: true })(Topic))

app/src/components/Sidebar/TopicPanel/TopicDeleteButton.tsx

@@ -0,0 +1,19 @@
+import * as q from '../../../../../backend/src/Model'
+import CustomIconButton from '../../helper/CustomIconButton'
+import Delete from '@material-ui/icons/Delete'
+import React from 'react'
+
+export const TopicDeleteButton = (props: {
+  node?: q.TreeNode<any>
+  deleteTopicAction: (node: q.TreeNode<any>) => void
+}) => {
+  const { node } = props
+  if (!node || !node.message || !node.message.value) {
+    return null
+  }
+  return (
+    <CustomIconButton onClick={() => props.deleteTopicAction(node)} tooltip="Clear this topic">
+      <Delete style={{ marginTop: '-3px' }} />
+    </CustomIconButton>
+  )
+}

app/src/components/Sidebar/TopicPanel/TopicPanel.tsx

@@ -0,0 +1,48 @@
+import * as q from '../../../../../backend/src/Model'
+import Copy from '../../helper/Copy'
+import Panel from '../Panel'
+import React, { useMemo } from 'react'
+import Topic from './Topic'
+import { bindActionCreators } from 'redux'
+import { connect } from 'react-redux'
+import { RecursiveTopicDeleteButton } from './RecursiveTopicDeleteButton'
+import { sidebarActions } from '../../../actions'
+import { TopicDeleteButton } from './TopicDeleteButton'
+
+const TopicPanel = (props: { node?: q.TreeNode<any>; actions: typeof sidebarActions; updateNode: () => void }) => {
+  const { node, updateNode } = props
+  const copyTopic = node ? <Copy value={node.path()} /> : null
+
+  const deleteTopic = (topic?: q.TreeNode<any>, recursive: boolean = false, maxCount = 50) => {
+    if (!topic) {
+      return
+    }
+
+    props.actions.clearTopic(topic, recursive, maxCount)
+  }
+
+  return useMemo(
+    () => (
+      <Panel disabled={!Boolean(node)}>
+        <span>
+          Topic {copyTopic}
+          <TopicDeleteButton node={node} deleteTopicAction={deleteTopic} />
+          <RecursiveTopicDeleteButton node={node} deleteTopicAction={deleteTopic} />
+        </span>
+        <Topic node={node} didSelectNode={updateNode} />
+      </Panel>
+    ),
+    [node, node && node.childTopicCount()]
+  )
+}
+
+const mapDispatchToProps = (dispatch: any) => {
+  return {
+    actions: bindActionCreators(sidebarActions, dispatch),
+  }
+}
+
+export default connect(
+  undefined,
+  mapDispatchToProps
+)(TopicPanel)

app/src/components/Sidebar/ValueRenderer.tsx

@@ -1,67 +0,0 @@
-import * as React from 'react'
-import * as q from '../../../../backend/src/Model'
-
-import { Theme, withTheme } from '@material-ui/core/styles'
-
-import { default as ReactJson } from 'react-json-view'
-
-interface Props {
-  message?: q.Message
-  theme: Theme
-}
-
-class ValueRenderer extends React.Component<Props, {}> {
-  public render() {
-    return <div>{this.renderValue()}</div>
-  }
-
-  public renderValue() {
-    const { message } = this.props
-    if (!message) {
-      return null
-    }
-
-    let json
-    try {
-      json = JSON.parse(message.value)
-    } catch (error) {
-      return this.renderRawValue(message.value)
-    }
-
-    if (typeof json === 'string') {
-      return this.renderRawValue(message.value)
-    } else if (typeof json === 'number') {
-      return this.renderRawValue(message.value)
-    } else if (typeof json === 'boolean') {
-      return this.renderRawValue(message.value)
-    } else {
-      const theme = (this.props.theme.palette.type === 'dark') ? 'monokai' : 'bright:inverted'
-      return (
-        <ReactJson
-          style={{ width: '100%' }}
-          src={json}
-          theme={theme}
-        />
-      )
-    }
-  }
-
-  private renderRawValue(value: string) {
-    const style: React.CSSProperties = {
-      backgroundColor: 'rgba(80, 80, 80, 0.6)',
-      wordBreak: 'break-all',
-      width: '100%',
-      overflowX: 'scroll',
-      overflowY: 'clip',
-      display: 'block',
-      lineHeight: '1.2em',
-      padding: '12px 5px 12px 5px',
-      maxWidth: '40vw',
-      color: this.props.theme.palette.text.primary,
-    }
-
-    return <pre style={style}><code>{value}</code></pre>
-  }
-}
-
-export default withTheme()(ValueRenderer)

app/src/components/Sidebar/ValueRenderer/MessageHistory.tsx

@@ -0,0 +1,144 @@
+import * as q from '../../../../../backend/src/Model'
+import * as React from 'react'
+import ShowChart from '@material-ui/icons/ShowChart'
+import Copy from '../../helper/Copy'
+import DateFormatter from '../../helper/DateFormatter'
+import History from '../HistoryDrawer'
+import TopicPlot from '../../TopicPlot'
+import { Base64Message } from '../../../../../backend/src/Model/Base64Message'
+import { isPlottable } from '../CodeDiff/util'
+import { TopicViewModel } from '../../../model/TopicViewModel'
+import { bindActionCreators } from 'redux'
+import { chartActions } from '../../../actions'
+import { connect } from 'react-redux'
+import CustomIconButton from '../../helper/CustomIconButton'
+
+const throttle = require('lodash.throttle')
+
+interface Props {
+  node?: q.TreeNode<TopicViewModel>
+  selected?: q.Message
+  onSelect: (message: q.Message) => void
+  actions: {
+    charts: typeof chartActions
+  }
+}
+
+interface State {
+  displayMessage?: q.Message
+  anchorEl?: HTMLElement
+}
+
+class MessageHistory extends React.Component<Props, State> {
+  private updateNode = throttle(() => {
+    this.setState(this.state)
+  }, 300)
+
+  constructor(props: any) {
+    super(props)
+    this.state = {}
+  }
+
+  private addNodeToCharts = (event: React.MouseEvent) => {
+    event.preventDefault()
+    event.stopPropagation()
+
+    const { node } = this.props
+    if (!node) {
+      return null
+    }
+
+    this.props.actions.charts.addChart({ topic: node.path() })
+  }
+
+  private displayMessage = (index: number, eventTarget: EventTarget) => {
+    const message = this.props.node && this.props.node.messageHistory.toArray().reverse()[index]
+    if (message) {
+      this.props.onSelect(message)
+    }
+  }
+
+  public componentWillReceiveProps(nextProps: Props) {
+    this.props.node && this.props.node.onMessage.unsubscribe(this.updateNode)
+    nextProps.node && nextProps.node.onMessage.subscribe(this.updateNode)
+  }
+
+  public componentDidMount() {
+    this.props.node && this.props.node.onMessage.subscribe(this.updateNode)
+  }
+
+  public componentWillUnMount() {
+    this.props.node && this.props.node.onMessage.unsubscribe(this.updateNode)
+  }
+
+  public render() {
+    const { node } = this.props
+    if (!node) {
+      return null
+    }
+
+    const history = node.messageHistory.toArray()
+    let previousMessage: q.Message | undefined = node.message
+    const historyElements = [...history].reverse().map((message, idx) => {
+      const value = message.value ? Base64Message.toUnicodeString(message.value) : ''
+      const element = {
+        value,
+        key: `${message.messageNumber}-${message.received}`,
+        title: (
+          <span>
+            <DateFormatter date={message.received} />
+            {previousMessage && previousMessage !== message ? (
+              <i>
+                (-
+                <DateFormatter date={message.received} intervalSince={previousMessage.received} />)
+              </i>
+            ) : null}
+            <div style={{ float: 'right' }}>
+              <Copy value={value} />
+            </div>
+          </span>
+        ),
+        selected: message && message === this.props.selected,
+      }
+      previousMessage = message
+      return element
+    })
+
+    const isMessagePlottable =
+      node.message && node.message.value && isPlottable(Base64Message.toUnicodeString(node.message.value))
+    return (
+      <div>
+        <History
+          items={historyElements}
+          contentTypeIndicator={
+            isMessagePlottable ? (
+              <CustomIconButton
+                style={{ height: '22px', width: '22px' }}
+                onClick={this.addNodeToCharts}
+                tooltip="Add to chart panel"
+              >
+                <ShowChart style={{ marginTop: '-5px' }} />
+              </CustomIconButton>
+            ) : (
+              undefined
+            )
+          }
+          onClick={this.displayMessage}
+        >
+          {isMessagePlottable ? <TopicPlot history={node.messageHistory} /> : null}
+        </History>
+      </div>
+    )
+  }
+}
+
+const mapDispatchToProps = (dispatch: any) => {
+  return {
+    actions: { charts: bindActionCreators(chartActions, dispatch) },
+  }
+}
+
+export default connect(
+  null,
+  mapDispatchToProps
+)(MessageHistory)

app/src/components/Sidebar/ValueRenderer/ValuePanel.tsx

@@ -0,0 +1,215 @@
+import * as q from '../../../../../backend/src/Model'
+import * as React from 'react'
+import Clear from '@material-ui/icons/Clear'
+import Code from '@material-ui/icons/Code'
+import Copy from '../../helper/Copy'
+import DateFormatter from '../../helper/DateFormatter'
+import ExpandMore from '@material-ui/icons/ExpandMore'
+import MessageHistory from './MessageHistory'
+import Reorder from '@material-ui/icons/Reorder'
+import ToggleButton from '@material-ui/lab/ToggleButton'
+import ToggleButtonGroup from '@material-ui/lab/ToggleButtonGroup'
+import ValueRenderer from './ValueRenderer'
+import { AppState } from '../../../reducers'
+import { Base64Message } from '../../../../../backend/src/Model/Base64Message'
+import { bindActionCreators } from 'redux'
+import { connect } from 'react-redux'
+import { settingsActions, sidebarActions } from '../../../actions'
+import { ValueRendererDisplayMode } from '../../../reducers/Settings'
+
+import {
+  Button,
+  ExpansionPanel,
+  ExpansionPanelDetails,
+  ExpansionPanelSummary,
+  Tooltip,
+  Typography,
+  StyleRulesCallback,
+  withStyles,
+  Theme,
+} from '@material-ui/core'
+
+interface Props {
+  node?: q.TreeNode<any>
+  valueRendererDisplayMode: ValueRendererDisplayMode
+  sidebarActions: typeof sidebarActions
+  settingsActions: typeof settingsActions
+  classes: any
+  lastUpdate: number
+  compareMessage?: q.Message
+}
+
+interface State {}
+
+class ValuePanel extends React.Component<Props, State> {
+  constructor(props: Props) {
+    super(props)
+    this.state = {}
+  }
+
+  private renderValue() {
+    const node = this.props.node
+    if (!node || !node.message) {
+      return null
+    }
+
+    return <ValueRenderer treeNode={node} message={node.message} compareWith={this.props.compareMessage} />
+  }
+
+  private renderViewOptions() {
+    if (!this.props.node || !this.props.node.message || !this.props.node.mqttMessage) {
+      return null
+    }
+
+    const retainedButton = (
+      <Tooltip title="Delete retained topic" placement="top">
+        <Button
+          size="small"
+          color="secondary"
+          variant="contained"
+          style={{ marginTop: '11px', padding: '0px 4px', minHeight: '24px' }}
+          onClick={this.props.sidebarActions.clearRetainedTopic}
+        >
+          retained <Clear style={{ fontSize: '16px', marginLeft: '2px' }} />
+        </Button>
+      </Tooltip>
+    )
+
+    return (
+      <div style={{ width: '100%', display: 'flex', paddingLeft: '8px' }}>
+        <span style={{ marginTop: '2px', flexGrow: 1 }}>{this.renderActionButtons()}</span>
+        <div style={{ flex: 6, textAlign: 'right' }}>{this.props.node.mqttMessage.retain ? retainedButton : null}</div>
+        {this.messageMetaInfo()}
+      </div>
+    )
+  }
+
+  private messageMetaInfo() {
+    if (!this.props.node || !this.props.node.message || !this.props.node.mqttMessage) {
+      return null
+    }
+
+    return (
+      <span style={{ width: '100%', paddingLeft: '8px', flex: 6 }}>
+        <Typography style={{ textAlign: 'right' }}>QoS: {this.props.node.mqttMessage.qos}</Typography>
+        <Typography style={{ textAlign: 'right' }}>
+          <i>
+            <DateFormatter date={this.props.node.message.received} />
+          </i>
+        </Typography>
+      </span>
+    )
+  }
+
+  private renderActionButtons() {
+    const handleValue = (mouseEvent: React.MouseEvent, value: any) => {
+      if (value === null) {
+        return
+      }
+      this.props.settingsActions.setValueDisplayMode(value)
+    }
+
+    return (
+      <ToggleButtonGroup
+        id="valueRendererDisplayMode"
+        value={this.props.valueRendererDisplayMode}
+        exclusive={true}
+        onChange={handleValue}
+      >
+        <ToggleButton className={this.props.classes.toggleButton} value="diff" id="valueRendererDisplayMode-diff">
+          <Tooltip title="Show difference between the current and the last message">
+            <span>
+              <Code className={this.props.classes.toggleButtonIcon} />
+            </span>
+          </Tooltip>
+        </ToggleButton>
+        <ToggleButton className={this.props.classes.toggleButton} value="raw" id="valueRendererDisplayMode-raw">
+          <Tooltip title="Raw value">
+            <span>
+              <Reorder className={this.props.classes.toggleButtonIcon} />
+            </span>
+          </Tooltip>
+        </ToggleButton>
+      </ToggleButtonGroup>
+    )
+  }
+
+  private panelStyle() {
+    return {
+      detailsStyle: { padding: '0px 16px 8px 8px', display: 'block' },
+      summaryStyle: { minHeight: '0' },
+    }
+  }
+
+  private handleMessageHistorySelect = (message: q.Message) => {
+    if (message !== this.props.compareMessage) {
+      this.props.sidebarActions.setCompareMessage(message)
+    } else {
+      this.props.sidebarActions.setCompareMessage(undefined)
+    }
+  }
+
+  public render() {
+    const { node, classes } = this.props
+    const { detailsStyle, summaryStyle } = this.panelStyle()
+
+    const copyValue =
+      node && node.message && node.message.value ? (
+        <Copy value={Base64Message.toUnicodeString(node.message.value)} />
+      ) : null
+
+    return (
+      <ExpansionPanel key="value" defaultExpanded={true}>
+        <ExpansionPanelSummary expandIcon={<ExpandMore />} style={summaryStyle}>
+          <Typography className={classes.heading}>Value {copyValue}</Typography>
+        </ExpansionPanelSummary>
+        <ExpansionPanelDetails style={detailsStyle}>
+          {this.renderViewOptions()}
+          <div style={{ marginBottom: '-8px' }}>
+            <React.Suspense fallback={<div>Loading...</div>}>{this.renderValue()}</React.Suspense>
+          </div>
+          <div>
+            <MessageHistory
+              onSelect={this.handleMessageHistorySelect}
+              selected={this.props.compareMessage}
+              node={this.props.node}
+            />
+          </div>
+        </ExpansionPanelDetails>
+      </ExpansionPanel>
+    )
+  }
+}
+
+const mapDispatchToProps = (dispatch: any) => {
+  return {
+    sidebarActions: bindActionCreators(sidebarActions, dispatch),
+    settingsActions: bindActionCreators(settingsActions, dispatch),
+  }
+}
+
+const mapStateToProps = (state: AppState) => {
+  return {
+    valueRendererDisplayMode: state.settings.get('valueRendererDisplayMode'),
+    node: state.tree.get('selectedTopic'),
+    compareMessage: state.sidebar.get('compareMessage'),
+  }
+}
+
+const styles = (theme: Theme) => ({
+  heading: {
+    fontSize: theme.typography.pxToRem(15),
+    fontWeight: theme.typography.fontWeightRegular,
+  },
+  toggleButton: {
+    height: '36px',
+  },
+  toggleButtonIcon: {
+    verticalAlign: 'middle',
+  },
+})
+
+export default connect(
+  mapStateToProps,
+  mapDispatchToProps
+)(withStyles(styles)(ValuePanel))

app/src/components/Sidebar/ValueRenderer/ValueRenderer.tsx

@@ -0,0 +1,112 @@
+import * as q from '../../../../../backend/src/Model'
+import * as React from 'react'
+import CodeDiff from '../CodeDiff'
+import { AppState } from '../../../reducers'
+import { Base64Message } from '../../../../../backend/src/Model/Base64Message'
+import { connect } from 'react-redux'
+import { default as ReactResizeDetector } from 'react-resize-detector'
+import { ValueRendererDisplayMode } from '../../../reducers/Settings'
+
+interface Props {
+  message: q.Message
+  treeNode: q.TreeNode<any>
+  compareWith?: q.Message
+  renderMode: ValueRendererDisplayMode
+}
+
+interface State {
+  width: number
+}
+
+class ValueRenderer extends React.Component<Props, State> {
+  constructor(props: Props) {
+    super(props)
+    this.state = { width: 0 }
+  }
+
+  private renderDiff(current: string = '', previous: string = '', language?: 'json') {
+    return (
+      <CodeDiff
+        treeNode={this.props.treeNode}
+        previous={previous}
+        current={current}
+        language={language}
+        nameOfCompareMessage={this.props.compareWith ? 'selected' : 'previous'}
+      />
+    )
+  }
+
+  private messageToPrettyJson(str: string): string | undefined {
+    try {
+      const json = JSON.parse(str)
+      return JSON.stringify(json, undefined, '  ')
+    } catch {
+      return undefined
+    }
+  }
+
+  private updateWidth = (width: number) => {
+    if (width !== this.state.width) {
+      this.setState({ width })
+    }
+  }
+
+  private renderRawValue(value: string, compare: string) {
+    return this.renderDiff(value, compare)
+  }
+
+  public render() {
+    return (
+      <div style={{ padding: '0px 0px 8px 8px' }}>
+        <ReactResizeDetector handleWidth={true} onResize={this.updateWidth} />
+        {this.renderValue()}
+      </div>
+    )
+  }
+
+  public renderValue() {
+    const { message, treeNode, compareWith, renderMode } = this.props
+    const previousMessages = treeNode.messageHistory.toArray()
+    const previousMessage = previousMessages[previousMessages.length - 2]
+    let compareMessage = compareWith || previousMessage || message
+    if (renderMode === 'raw') {
+      compareMessage = message
+    }
+    if (!message.value) {
+      return null
+    }
+
+    const compareValue = compareMessage.value || message.value
+    const str = Base64Message.toUnicodeString(message.value)
+    const compareStr = Base64Message.toUnicodeString(compareValue)
+
+    let json
+    try {
+      json = JSON.parse(str)
+    } catch (error) {
+      return this.renderRawValue(str, compareStr)
+    }
+
+    if (typeof json === 'string') {
+      return this.renderRawValue(str, compareStr)
+    } else if (typeof json === 'number') {
+      return this.renderRawValue(str, compareStr)
+    } else if (typeof json === 'boolean') {
+      return this.renderRawValue(str, compareStr)
+    } else {
+      const current = this.messageToPrettyJson(str) || str
+      const compare = this.messageToPrettyJson(compareStr) || compareStr
+      const language = current && compare ? 'json' : undefined
+
+      return this.renderDiff(current, compare, language)
+    }
+  }
+}
+
+const mapStateToProps = (state: AppState) => {
+  return {
+    renderMode: state.settings.get('valueRendererDisplayMode'),
+  }
+}
+
+export default connect(mapStateToProps)(ValueRenderer)

app/src/components/TitleBar.tsx

@@ -1,124 +0,0 @@
-import * as React from 'react'
-import { connect } from 'react-redux'
-import { bindActionCreators } from 'redux'
-import * as q from '../../../backend/src/Model'
-
-import { AppBar, IconButton, InputBase, Toolbar, Typography } from '@material-ui/core'
-import Search from '@material-ui/icons/Search'
-import Menu from '@material-ui/icons/Menu'
-import { withStyles, StyleRulesCallback } from '@material-ui/core/styles'
-import { fade } from '@material-ui/core/styles/colorManipulator'
-
-import { settingsActions } from '../actions'
-
-const styles: StyleRulesCallback = theme => ({
-  title: {
-    display: 'none',
-    [theme.breakpoints.up('sm')]: {
-      display: 'block',
-    },
-  },
-  search: {
-    position: 'relative',
-    borderRadius: theme.shape.borderRadius,
-    backgroundColor: fade(theme.palette.common.white, 0.15),
-    '&:hover': {
-      backgroundColor: fade(theme.palette.common.white, 0.25),
-    },
-    marginRight: theme.spacing.unit * 2,
-    marginLeft: 0,
-    width: '100%',
-    [theme.breakpoints.up('sm')]: {
-      marginLeft: theme.spacing.unit * 3,
-      width: 'auto',
-    },
-  },
-  searchIcon: {
-    width: theme.spacing.unit * 9,
-    height: '100%',
-    position: 'absolute',
-    pointerEvents: 'none',
-    display: 'flex',
-    alignItems: 'center',
-    justifyContent: 'center',
-  },
-  inputRoot: {
-    color: 'inherit',
-    width: '100%',
-  },
-  inputInput: {
-    paddingTop: theme.spacing.unit,
-    paddingRight: theme.spacing.unit,
-    paddingBottom: theme.spacing.unit,
-    paddingLeft: theme.spacing.unit * 10,
-    transition: theme.transitions.create('width'),
-    width: '100%',
-    [theme.breakpoints.up('md')]: {
-      width: 200,
-    },
-  },
-  menuButton: {
-    marginLeft: -12,
-    marginRight: 20,
-  },
-})
-
-interface Props {
-  classes: any
-  actions: any
-}
-
-interface State {
-  selectedNode?: q.TreeNode
-  settingsVisible: boolean
-  autoExpandLimit: number
-}
-
-class TitleBar extends React.Component<Props, State> {
-  constructor(props: any) {
-    super(props)
-    this.state = {
-      selectedNode: undefined,
-      settingsVisible: false,
-      autoExpandLimit: 0,
-    }
-  }
-
-  public render() {
-    const { classes } = this.props
-
-    return <AppBar position="static">
-        <Toolbar>
-          <IconButton className={classes.menuButton} color="inherit" aria-label="Menu" onClick={this.props.actions.toggleSettingsVisibility}>
-            <Menu />
-          </IconButton>
-          <Typography className={classes.title} variant="h6" color="inherit">MQTT-Xplorer</Typography>
-        </Toolbar>
-      </AppBar>
-  }
-
-  private renderSearch() {
-    const { classes } = this.props
-
-    return <div className={classes.search}>
-      <div className={classes.searchIcon}>
-        <Search />
-      </div>
-      <InputBase
-        placeholder="Search…"
-        classes={{
-          root: classes.inputRoot,
-          input: classes.inputInput,
-        }}
-      />
-    </div>
-  }
-}
-
-const mapDispatchToProps = (dispatch: any) => {
-  return {
-    actions: bindActionCreators(settingsActions, dispatch),
-  }
-}
-
-export default withStyles(styles)(connect(null, mapDispatchToProps)(TitleBar))