test packaging

upgrade ts-node
pin electron version
2026-09-11 17:13:53 +00:00 · 2024-03-11 13:36:28 +01:00 · 2024-03-10 14:10:22 +01:00 · 2024-03-10 13:06:05 +01:00 · 2024-03-10 12:57:00 +01:00 · 2024-03-10 12:56:35 +01:00
196 changed files with 11000 additions and 10347 deletions
@@ -1,6 +1,11 @@
 {
  "language": "en",
  "words": [
+    "Bbreak",
+    "nodered",
+    "goog",
+    "thomasnordquist",
+    "nowrap",
    "subheader",
    "basepath",
    "webdriverio",
@@ -41,6 +46,7 @@
    "DEVTOOLS",
    "mixins",
    "Explorerdmg",
-    "heapsnapshot"
+    "heapsnapshot",
+    "noconflict"
  ]
 }
@@ -0,0 +1,5 @@
+# These are supported funding model platforms
+
+patreon: thomasnordquist
+custom: https://paypal.me/ThomasNordquist
+
@@ -7,3 +7,5 @@ build
 test.dot
 test.png
 .awcache
+.scannerwork
+screen*.png
@@ -0,0 +1 @@
+engine-strict=true
@@ -17,7 +17,9 @@ os:
  - linux
  - osx

-dist: xenial
+osx_image: xcode10.2
+
+dist: bionic

 services:
  - docker
@@ -33,6 +35,12 @@ script:
  - 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 [[ "$TRAVIS_OS_NAME" == "linux" ]] && [[ "$TRAVIS_TAG" != "" ]]; then
+      openssl aes-256-cbc -d -in res/snapstore-credentials.enc -out credentials -k $SNAPSTORE_CREDENTIALS_DECRYPTION_KEY;
+      snapcraft login --with credentials;
+      rm credentials;
+      yarn run package linux;
+    fi
  - if [[ "$TRAVIS_OS_NAME" == "osx" ]] && [[ "$TRAVIS_TAG" != "" ]]; then yarn run package -- mac; fi
-  - if [[ "$TRAVIS_OS_NAME" == "osx" ]] && [[ "$TRAVIS_TAG" != "" ]]; then yarn run package -- win; fi
+  - if [[ "$TRAVIS_OS_NAME" == "osx" ]] && [[ "$TRAVIS_TAG" != "" ]]; then unset CSC_LINK; yarn run package -- win; fi
@@ -20,6 +20,7 @@ Pull-Requests and error reports are welcome.
 ## Run from sources

 ```bash
+npm install -g yarn
 yarn
 yarn build
 yarn start
@@ -29,6 +30,7 @@ yarn start

 Launch Application
 ```bash
+npm install -g yarn
 yarn
 yarn dev
 ```
@@ -39,25 +41,51 @@ The `app` directory contains all the rendering logic, the `backend` directory cu

 To achieve a reliable product automated tests run regularly on travis.

-  - Data model
-  - MQTT integration
-  - UI-Tests (The demo is a recorded ui test)
+- 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
 ```

+## Write docs
+
+```
+git clone --single-branch -b gh-pages https://github.com/thomasnordquist/MQTT-Explorer.git mqtt-explorer-pages
+cd mqtt-explorer-pages
+bundle install
+bundle exec jekyll serve --incremental
+```
+
+Readme file: `Readme.tpl.md`
+
+Preview is available at
+http://localhost:4000/Readme.tpl
+
+## Update docs
+
+```
+npm install
+./updateReadme.ts
+```
+
+The readme will be generated from the docs.
+
 ## License

 ![CC-BY-ND 4.0](https://img.shields.io/badge/License-CC%20BY--ND%204.0-blue.svg)  
@@ -1,182 +1,197 @@
 <!DOCTYPE html>
 <html>
-  <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>

-    <style>
-      body,
-      html {
-        margin: 0;
-        padding: 0;
+<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>
+
+  <style>
+    body,
+    html {
+      margin: 0;
+      padding: 0;
+    }
+
+    [tabindex] {
+      outline: none;
+    }
+
+    @keyframes updateDark {
+      0% {
+        background-color: none;
      }

-      [tabindex] {
-        outline: none;
+      25% {
+        background-color: #595585;
      }

-      @keyframes updateDark {
-        0% {
-          background-color: none;
-        }
-        25% {
-          background-color: #4f5781;
-        }
-        50% {
-          background-color: #4f5781;
-        }
-        100% {
-          background-color: none;
-        }
+      50% {
+        background-color: #595585;
      }

-      @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;
-        }
+      100% {
+        background-color: none;
+      }
+    }
+
+    @keyframes updateLight {
+      0% {
+        background-color: none;
+        color: inherit;
      }

-      ::-webkit-scrollbar {
-        width: 8px;
-        height: 8px;
+      25% {
+        background-color: #c0c8c0;
      }

-      ::-webkit-scrollbar-corner {
-        background-color: rgba(0, 0, 0, 0);
+      50% {
+        background-color: #c0c8c0;
      }

-      ::-webkit-scrollbar-track {
-        -webkit-box-shadow: inset 0 0 6px rgba(60, 60, 60, 0.5);
-        background-color: rgba(140, 140, 140, 0.1);
+      100% {
+        background-color: none;
+        color: inherit;
      }
+    }

-      ::-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;
-      }
+    ::-webkit-scrollbar {
+      width: 8px;
+      height: 8px;
+    }

-      .Resizer:hover {
-        -webkit-transition: all 0.3s ease-out;
-        transition: all 0.3s ease-out;
-      }
+    ::-webkit-scrollbar-corner {
+      background-color: rgba(0, 0, 0, 0);
+    }

-      .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%;
-      }
+    ::-webkit-scrollbar-track {
+      -webkit-box-shadow: inset 0 0 6px rgba(60, 60, 60, 0.5);
+      background-color: rgba(140, 140, 140, 0.1);
+    }

-      .Resizer.horizontal::before {
-        content: '•••';
-        display: inline-block;
-        vertical-align: middle;
-        text-align: center;
-        width: 100%;
-        margin-top: -22px;
-        color: #aaa;
-        opacity: 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.horizontal:hover {
-        border-top: 5px solid rgba(120, 120, 120, 0.3);
-        border-bottom: 5px solid rgba(120, 120, 120, 0.3);
-      }
+    .Resizer:hover {
+      -webkit-transition: all 0.3s ease-out;
+      transition: all 0.3s ease-out;
+    }

-      .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.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.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.horizontal::before {
+      content: '•••';
+      display: inline-block;
+      vertical-align: middle;
+      text-align: center;
+      width: 100%;
+      margin-top: -22px;
+      color: #aaa;
+      opacity: 1;
+    }

-      .Resizer.vertical:hover {
-        border-left: 0px solid rgba(130, 130, 130, 0.3);
-        border-right: 8px solid rgba(140, 140, 140, 0.3);
-      }
+    .Resizer.horizontal:hover {
+      border-top: 5px solid rgba(120, 120, 120, 0.3);
+      border-bottom: 5px solid rgba(120, 120, 120, 0.3);
+    }

-      .Resizer.disabled {
-        cursor: not-allowed;
-      }
-      .Resizer.disabled:hover {
-        border-color: transparent;
-      }
+    .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;
+    }

-      .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)
-      }
+    .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;
+    }

-      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>
+    .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>
+  <script>
+    global = globalThis //<- this should be enough
+  </script>
+</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>
@@ -4,82 +4,90 @@
  "description": "",
  "main": "index.js",
  "scripts": {
-    "build": "yarn rebuild && webpack --mode production",
+    "build": "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 -"
+    "test": "cross-env TS_NODE_PROJECT=test/tsconfig.json yarn mochatest",
+    "mochatest": "mocha --require ts-node/register src/**/*.spec.ts"
+  },
+  "engines": {
+    "node": "19"
  },
  "author": "",
  "license": "CC-BY-ND-4.0",
  "dependencies": {
-    "@material-ui/core": "^4",
+    "@material-ui/core": "4.12",
    "@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",
+    "@material-ui/styles": "4.11",
+    "@types/react-transition-group": "^4",
+    "ace-builds": "^1.4.11",
+    "axios": "^0.26.0",
+    "compare-versions": "^3.5.0",
    "copy-text-to-clipboard": "^2.1.0",
-    "d3": "^5.9.2",
+    "d3": "^5.9.7",
    "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",
+    "in-viewport": "^3.6.0",
    "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",
    "number-abbreviate": "^2.0.0",
+    "parse-duration": "^0.1.1",
    "prismjs": "^1.15.0",
-    "react": "16.8",
-    "react-ace": "^7.0.1",
+    "react": "^16.11",
+    "react-ace": "^8",
    "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-transition-group": "^4",
    "react-vis": "^1.11.6",
    "redux": "^4.0.1",
-    "redux-batched-actions": "^0.4.1",
+    "redux-batched-actions": "0.5",
    "redux-thunk": "^2.3.0",
    "sha1": "^1.1.1",
    "socket.io-client": "^2.2.0",
-    "uuid": "^3.3.2"
+    "uuid": "7"
  },
  "devDependencies": {
+    "@babel/runtime": "^7.17.2",
    "@types/d3": "^5.7.2",
    "@types/diff": "^4.0.1",
    "@types/get-value": "^3.0.1",
-    "@types/node": "^12.0.4",
+    "@types/node": "^12.7.8",
    "@types/prismjs": "^1.9.1",
-    "@types/react": "^16.7.18",
+    "@types/react": "^16.9.4",
    "@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/uuid": "^7.0.2",
    "@types/vis": "^4.21.9",
-    "awesome-typescript-loader": "^5.2.1",
+    "chai": "^4.2.0",
+    "cross-env": "^7.0.2",
    "css-loader": "^3.0.0",
-    "hard-source-webpack-plugin": "^0.13.1",
-    "heapdump": "^0.3.12",
-    "html-webpack-plugin": "^4.0.0-beta.5",
+    "file-loader": "^6.2.0",
+    "html-webpack-plugin": "^5.5.0",
+    "lodash": "^4.17.21",
+    "mocha": "^9.2.1",
+    "moment": "^2.29.1",
    "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"
+    "style-loader": "^1",
+    "ts-loader": "^9.2.6",
+    "typescript": "^4.5.5",
+    "webpack": "^5.69.1",
+    "webpack-bundle-analyzer": "^4.5.0",
+    "webpack-cli": "^4.9.2",
+    "webpack-dev-server": "^4.7.4"
  },
  "peerDependencies": {
-    "electron": "^5.0.5"
+    "electron": "^29"
  }
 }
@@ -45,9 +45,7 @@ export const saveCharts = () => async (dispatch: Dispatch<any>, getState: () =>
    return
  }

-  const charts = getState()
-    .charts.get('charts')
-    .toArray()
+  const charts = getState().charts.get('charts').toArray()

  let viewStates: ConnectionViewStateDictionary | undefined
  try {
@@ -62,63 +60,55 @@ export const saveCharts = () => async (dispatch: Dispatch<any>, getState: () =>
  }
 }

-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
+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'))
  }

-  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 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 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 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 {
@@ -11,31 +11,29 @@ 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
+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!))
+    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())
      }
-    } else if (dataSourceState.error) {
-      dispatch(showError(dataSourceState.error))
-      dispatch(disconnect())
-    }
-    dispatch(updateHealth(dataSourceState))
-  })
-}
+      dispatch(updateHealth(dataSourceState))
+    })
+  }

 const updateHealth = (dataSourceState: DataSourceState) => (dispatch: Dispatch<any>, getState: () => AppState) => {
  let state
@@ -9,13 +9,15 @@ import {
 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 { promises as fsPromise } from 'fs'
 import * as path from 'path'
-
 import { ActionTypes, Action } from '../reducers/ConnectionManager'
+import { Subscription } from '../../../backend/src/DataSource/MqttSource'
+import { connectionsMigrator } from './migrations/Connection'
+import { rendererRpc } from '../../../events'
+import { makeOpenDialogRpc } from '../../../events/OpenDialogRequest'

-interface ConnectionDictionary {
+export interface ConnectionDictionary {
  [s: string]: ConnectionOptions
 }
 const storedConnectionsIdentifier: StorageIdentifier<ConnectionDictionary> = {
@@ -27,6 +29,12 @@ export const loadConnectionSettings = () => async (dispatch: Dispatch<any>, getS
  try {
    await ensureConnectionsHaveBeenInitialized()
    connections = await persistentStorage.load(storedConnectionsIdentifier)
+
+    // Apply migrations
+    if (connections && connectionsMigrator.isMigrationNecessary(connections)) {
+      connections = connectionsMigrator.applyMigrations(connections)
+      await persistentStorage.store(storedConnectionsIdentifier, connections)
+    }
  } catch (error) {
    dispatch(showError(error))
  }
@@ -43,21 +51,19 @@ export const loadConnectionSettings = () => async (dispatch: Dispatch<any>, getS
 }

 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))
+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 = {
@@ -65,35 +71,25 @@ async function openCertificate(): Promise<CertificateParameters> {
    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),
-          })
-        })
-      }
-    )
+  const openDialogReturnValue = await rendererRpc.call(makeOpenDialogRpc(), {
+    properties: ['openFile'],
+    securityScopedBookmarks: true,
  })
+
+  const selectedFile = openDialogReturnValue.filePaths && openDialogReturnValue.filePaths[0]
+  if (!selectedFile) {
+    throw rejectReasons.noCertificateSelected
+  }
+
+  const data = await fsPromise.readFile(selectedFile)
+  if (data.length > 16_384 || data.length < 64) {
+    throw rejectReasons.certificateSizeDoesNotMatch
+  }
+
+  return {
+    data: data.toString('base64'),
+    name: path.basename(selectedFile),
+  }
 }

 export const saveConnectionSettings = () => async (dispatch: Dispatch<any>, getState: () => AppState) => {
@@ -111,13 +107,13 @@ export const updateConnection = (connectionId: string, changeSet: Partial<Connec
  type: ActionTypes.CONNECTION_MANAGER_UPDATE_CONNECTION,
 })

-export const addSubscription = (subscription: string, connectionId: string): Action => ({
+export const addSubscription = (subscription: Subscription, connectionId: string): Action => ({
  connectionId,
  subscription,
  type: ActionTypes.CONNECTION_MANAGER_ADD_SUBSCRIPTION,
 })

-export const deleteSubscription = (subscription: string, connectionId: string): Action => ({
+export const deleteSubscription = (subscription: Subscription, connectionId: string): Action => ({
  connectionId,
  subscription,
  type: ActionTypes.CONNECTION_MANAGER_DELETE_SUBSCRIPTION,
@@ -184,31 +180,4 @@ async function ensureConnectionsHaveBeenInitialized() {

    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
 }
@@ -1,7 +1,7 @@
-import { ActionTypes } from '../reducers/Global'
+import { ActionTypes, ConfirmationRequest } from '../reducers/Global'
 import { Dispatch } from 'redux'

-export const showError = (error?: string) => ({
+export const showError = (error?: string | unknown) => ({
  error,
  type: ActionTypes.showError,
 })
@@ -20,3 +20,30 @@ export const toggleSettingsVisibility = () => (dispatch: Dispatch<any>) => {
    type: ActionTypes.toggleSettingsVisibility,
  })
 }
+
+export const requestConfirmation = (title: string, inquiry: string) => (dispatch: Dispatch<any>) => {
+  return new Promise(resolve => {
+    const confirmationRequest = {
+      title,
+      inquiry,
+      callback: (confirmed: boolean) => {
+        resolve(confirmed)
+        dispatch(removeConfirmationRequest(confirmationRequest))
+      },
+    }
+
+    dispatch({
+      confirmationRequest,
+      type: ActionTypes.requestConfirmation,
+    })
+  })
+}
+
+export const removeConfirmationRequest = (confirmationRequest: ConfirmationRequest) => (dispatch: Dispatch<any>) => {
+  return new Promise((resolve, reject) => {
+    dispatch({
+      confirmationRequest,
+      type: ActionTypes.removeConfirmationRequest,
+    })
+  })
+}
@@ -34,7 +34,7 @@ export const setEditorMode = (editorMode: string): Action => {

 export const publish = (connectionId: string) => (dispatch: Dispatch<Action>, getState: () => AppState) => {
  const state = getState()
-  const topic = state.publish.topic
+  const topic = state.publish.manualTopic ?? state.tree.get('selectedTopic')?.path()

  if (!topic) {
    return
@@ -43,12 +43,14 @@ export const storeSettings = () => async (dispatch: Dispatch<any>, getState: ()
  }
 }

-export const setAutoExpandLimit = (autoExpandLimit: number = 0) => (dispatch: Dispatch<any>) => {
-  dispatch({
-    autoExpandLimit,
-    type: ActionTypes.SETTINGS_SET_AUTO_EXPAND_LIMIT,
-  })
-}
+export const setAutoExpandLimit =
+  (autoExpandLimit: number = 0) =>
+  (dispatch: Dispatch<any>) => {
+    dispatch({
+      autoExpandLimit,
+      type: ActionTypes.SETTINGS_SET_AUTO_EXPAND_LIMIT,
+    })
+  }

 export const setTimeLocale = (timeLocale: string) => (dispatch: Dispatch<any>) => {
  dispatch({
@@ -81,13 +83,15 @@ export const toggleHighlightTopicUpdates = () => (dispatch: Dispatch<any>) => {
  dispatch(storeSettings())
 }

-export const setTopicOrder = (topicOrder: TopicOrder = TopicOrder.none) => (dispatch: Dispatch<any>) => {
-  dispatch({
-    topicOrder,
-    type: ActionTypes.SETTINGS_SET_TOPIC_ORDER,
-  })
-  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
@@ -105,21 +109,15 @@ export const filterTopics = (filterStr: string) => (dispatch: Dispatch<any>, get
  const topicFilter = filterStr.toLowerCase()

  const nodeFilter = (node: q.TreeNode<TopicViewModel>): boolean => {
-    const topicMatches =
-      node
-        .path()
-        .toLowerCase()
-        .indexOf(topicFilter) !== -1
+    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
+      node.message.payload &&
+      Base64Message.toUnicodeString(node.message.payload).toLowerCase().indexOf(filterStr) !== -1

    return Boolean(messageMatches)
  }
@@ -11,14 +11,11 @@ const debounce = require('lodash.debounce')
 export { clearTopic } from './clearTopic'

 export { moveSelectionUpOrDownwards, moveInward, moveOutward } from './visibleTreeTraversal'
-import { moveSelectionUpOrDownwards } from './visibleTreeTraversal'

-export const selectTopic = (topic: q.TreeNode<TopicViewModel>) => (
-  dispatch: Dispatch<any>,
-  getState: () => AppState
-) => {
-  debouncedSelectTopic(topic, dispatch, getState)
-}
+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) => {
@@ -30,9 +27,9 @@ const debouncedSelectTopic = debounce(

    // Update publish topic
    let setTopicDispatch: any | undefined
-    if (!getState().publish.topic) {
+    if (!getState().publish.manualTopic) {
      setTopicDispatch = setTopic(topic.path())
-    } else if (previouslySelectedTopic && previouslySelectedTopic.path() === getState().publish.topic) {
+    } else if (previouslySelectedTopic && previouslySelectedTopic.path() === getState().publish.manualTopic) {
      setTopicDispatch = setTopic(topic.path())
    }

@@ -75,38 +72,42 @@ function destroyUnreferencedTree(state: AppState) {
  }
 }

-export const resetStore = () => (dispatch: Dispatch<any>, getState: () => AppState): AnyAction => {
-  destroyUnreferencedTree(getState())
+export const resetStore =
+  () =>
+  (dispatch: Dispatch<any>, getState: () => AppState): AnyAction => {
+    destroyUnreferencedTree(getState())

-  return dispatch({
-    type: ActionTypes.TREE_RESET_STORE,
-  })
-}
+    return dispatch({
+      type: ActionTypes.TREE_RESET_STORE,
+    })
+  }

-export const showTree = (tree: q.Tree<TopicViewModel> | undefined) => (
-  dispatch: Dispatch<any>,
-  getState: () => AppState
-): AnyAction => {
-  destroyUnreferencedTree(getState())
+export const showTree =
+  (tree: q.Tree<TopicViewModel> | undefined) =>
+  (dispatch: Dispatch<any>, getState: () => AppState): AnyAction => {
+    destroyUnreferencedTree(getState())

-  return dispatch({
-    tree,
-    type: ActionTypes.TREE_SHOW_TREE,
-  })
-}
+    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 (tree) {
+    paused ? tree.resume() : tree.pause()
+  }
+
  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.`))
    }
@@ -3,39 +3,52 @@ import { AppState } from '../reducers'
 import { Dispatch } from 'redux'
 import { makePublishEvent, rendererEvents } from '../../../events'
 import { moveSelectionUpOrDownwards } from './visibleTreeTraversal'
+import { globalActions } from '.'

-export const clearTopic = (topic: q.TreeNode<any>, recursive: boolean, subtopicClearLimit = 50) => (
-  dispatch: Dispatch<any>,
-  getState: () => AppState
-) => {
-  dispatch(moveSelectionUpOrDownwards('next'))
+export const clearTopic =
+  (topic: q.TreeNode<any>, recursive: boolean) => async (dispatch: Dispatch<any>, getState: () => AppState) => {
+    const topicsForPurging = recursive ? [topic, ...topic.childTopics()] : [topic]

-  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) => {
+    if (recursive) {
+      const topicCount = topic.childTopicCount()
+
+      const topicDelta = topic.hasMessage() ? -1 : 0
+      const childTopicsMessage =
+        topicCount + topicDelta > 0
+          ? ` and ${topicCount + topicDelta} child ${topicCount + topicDelta === 1 ? 'topic' : 'topics'}`
+          : ''
+
+      const confirmed = await dispatch(
+        globalActions.requestConfirmation(
+          'Confirm delete',
+          `Do you want to clear "${topic.path()}"${childTopicsMessage}?\n\nThis function will send an empty payload (QoS 0, retain) to this and every subtopic, clearing retained topics in the process. Only use this function if you know what you are doing.`
+        )
+      )
+      if (!confirmed) {
+        return
+      }
+    }
+
+    dispatch(moveSelectionUpOrDownwards('next'))
+
+    const { connectionId } = getState().connection
+    if (!connectionId) {
+      return
+    }
+    const publishEvent = makePublishEvent(connectionId)
+
+    topicsForPurging
+      .filter(t => t.path() !== '' && t.hasMessage())
+      .map(t => t.path())
+      .forEach((path, idx) => {
        const mqttMessage = {
-          topic: topic.path(),
+          topic: path,
          payload: null,
          retain: true,
          qos: 0 as 0,
+          messageId: undefined,
        }
        // Rate limit deletion
        setTimeout(() => rendererEvents.emit(publishEvent, mqttMessage), 20 * idx)
      })
  }
-}
@@ -0,0 +1,94 @@
+import { ConfigMigrator, Migration } from '../../utils/ConfigMigrator'
+import { ConnectionDictionary } from '../ConnectionManager'
+import { ConnectionOptions } from '../../model/ConnectionOptions'
+
+export interface ConnectionOptionsV0 {
+  type: 'mqtt'
+  id: string
+  host: string
+  protocol: 'mqtt' | 'ws'
+  basePath?: string
+  port: number
+  name: string
+  username?: string
+  password?: string
+  encryption: boolean
+  certValidation: boolean
+  // selfSignedCertificate?: CertificateParameters
+  // clientCertificate?: CertificateParameters
+  // clientKey?: CertificateParameters
+  clientId?: string
+  subscriptions: Array<string>
+}
+
+let migrations: Migration[] = [
+  // iot.eclipse.org ha moved to mqtt.eclipse.org
+  {
+    from: undefined,
+    apply: (connection: ConnectionOptionsV0): ConnectionOptionsV0 => {
+      if (connection.id == 'iot.eclipse.org' && connection.host == 'iot.eclipse.org' && connection.port == 1883) {
+        return {
+          ...connection,
+          id: 'mqtt.eclipse.org',
+          host: 'mqtt.eclipse.org',
+          name: 'mqtt.eclipse.org',
+        }
+      }
+
+      return {
+        ...connection,
+      }
+    },
+  },
+  // Remove stored clientId if it is the default generated client id. This allows to connect multiple instances of mqtt explorer to the same broker.
+  // A randomly generated clientId will be used if no clientId is set.
+  {
+    from: undefined,
+    apply: (connection: ConnectionOptionsV0): ConnectionOptionsV0 => {
+      if (connection.clientId && /mqtt-explorer-[0-9a-f]{8}/.test(connection.clientId)) {
+        return {
+          ...connection,
+          clientId: undefined,
+        }
+      }
+
+      return {
+        ...connection,
+      }
+    },
+  },
+  // Added QoS level to subscription options
+  {
+    from: undefined,
+    apply: (connection: ConnectionOptionsV0): ConnectionOptions => {
+      return {
+        ...connection,
+        configVersion: 1,
+        subscriptions: connection.subscriptions.map(topic => ({ topic, qos: 0 })),
+      }
+    },
+  },
+]
+
+const connectionMigrator = new ConfigMigrator(migrations)
+
+function isMigrationNecessary(connections: ConnectionDictionary): boolean {
+  return Object.values(connections)
+    .map(connection => connectionMigrator.isMigrationNecessary(connection))
+    .reduce((a, b) => a || b, false)
+}
+
+function applyMigrations(connections: ConnectionDictionary): ConnectionDictionary {
+  let newConnectionDictionary: ConnectionDictionary = {}
+  Object.keys(connections).forEach(key => {
+    let newConnection = connectionMigrator.applyMigrations(connections[key]) as any
+    newConnectionDictionary[newConnection.id] = newConnection
+  })
+
+  return newConnectionDictionary
+}
+
+export const connectionsMigrator = {
+  isMigrationNecessary,
+  applyMigrations,
+}
@@ -6,53 +6,56 @@ 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')
+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))
+    if (!selected || !tree) {
+      if (tree) {
+        dispatch(selectTopic(tree))
+      }
+      return
+    }
+    const nextTreeNode = nextVisibleElementInTree(state.settings, tree, selected, direction)
+    if (nextTreeNode && nextTreeNode.viewModel) {
+      dispatch(selectTopic(nextTreeNode))
    }
-    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 moveInward =
+  () =>
+  (dispatch: Dispatch<any>, getState: () => AppState): any => {
+    const state = getState()
+    const selected = state.tree.get('selectedTopic')
+    if (!selected || !selected.viewModel) {
+      return
+    }

-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(true, true)
+    } else {
+      dispatch(moveSelectionUpOrDownwards('next'))
+    }
  }

-  if (selected.viewModel.isExpanded() && selected.edgeCount() > 0) {
-    selected.viewModel.setExpanded(false, true)
-  } else {
-    dispatch(moveSelectionUpOrDownwards('previous'))
+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)
@@ -1,15 +1,18 @@
-import * as React from 'react'
+import ConfirmationDialog from './ConfirmationDialog'
 import ConnectionSetup from './ConnectionSetup/ConnectionSetup'
 import CssBaseline from '@material-ui/core/CssBaseline'
 import ErrorBoundary from './ErrorBoundary'
 import Notification from './Layout/Notification'
+import React from 'react'
 import TitleBar from './Layout/TitleBar'
 import UpdateNotifier from './UpdateNotifier'
 import { AppState } from '../reducers'
 import { bindActionCreators } from 'redux'
+import { ConfirmationRequest } from '../reducers/Global'
 import { connect } from 'react-redux'
 import { globalActions, settingsActions } from '../actions'
 import { Theme, withStyles } from '@material-ui/core/styles'
+;(window as any).global = window

 const Settings = React.lazy(() => import('./SettingsDrawer/Settings'))
 const ContentView = React.lazy(() => import('./Layout/ContentView'))
@@ -23,6 +26,7 @@ interface Props {
  actions: typeof globalActions
  settingsActions: typeof settingsActions
  launching: boolean
+  confirmationRequests: Array<ConfirmationRequest>
 }

 class App extends React.PureComponent<Props, {}> {
@@ -63,13 +67,16 @@ class App extends React.PureComponent<Props, {}> {
      return null
    }

+    const anyProps: any = {}
+
    return (
      <div className={centerContent}>
        <CssBaseline />
        <ErrorBoundary>
+          <ConfirmationDialog confirmationRequests={this.props.confirmationRequests} />
          {this.renderNotification()}
          <React.Suspense fallback={<div></div>}>
-            <Settings />
+            <Settings {...anyProps} />
          </React.Suspense>
          <div className={centerContent}>
            <div className={`${settingsVisible ? contentShift : content}`}>
@@ -149,12 +156,8 @@ const mapStateToProps = (state: AppState) => {
    notification: state.globalState.get('notification'),
    highlightTopicUpdates: state.settings.get('highlightTopicUpdates'),
    launching: state.globalState.get('launching'),
+    confirmationRequests: state.globalState.get('confirmationRequests'),
  }
 }

-export default withStyles(styles)(
-  connect(
-    mapStateToProps,
-    mapDispatchToProps
-  )(App)
-)
+export default withStyles(styles)(connect(mapStateToProps, mapDispatchToProps)(App))
@@ -0,0 +1,105 @@
+import DateFormatter from '../helper/DateFormatter'
+import NoData from './NoData'
+import NumberFormatter from '../helper/NumberFormatter'
+import React, { memo, useCallback } from 'react'
+import TooltipComponent from './TooltipComponent'
+import { default as ReactResizeDetector } from 'react-resize-detector'
+import { emphasize } from '@material-ui/core/styles'
+import { mapCurveType } from './mapCurveType'
+import { PlotCurveTypes } from '../../reducers/Charts'
+import { Point, Tooltip } from './Model'
+import { Theme, withTheme } from '@material-ui/core'
+import { useCustomXDomain } from './effects/useCustomXDomain'
+import { useCustomYDomain } from './effects/useCustomYDomain'
+import 'react-vis/dist/style.css'
+const { XYPlot, LineMarkSeries, YAxis, HorizontalGridLines, Hint } = require('react-vis')
+const abbreviate = require('number-abbreviate')
+
+export interface Props {
+  data: Array<{ x: number; y: number }>
+  theme: Theme
+  interpolation?: PlotCurveTypes
+  range?: [number?, number?]
+  timeRangeStart?: number
+  color?: string
+}
+
+export default withTheme(
+  memo((props: Props) => {
+    const [width, setWidth] = React.useState(300)
+    const [tooltip, setTooltip] = React.useState<Tooltip | undefined>()
+    const detectResize = React.useCallback(newWidth => setWidth(newWidth), [])
+
+    const hintFormatter = React.useCallback(
+      (point: any) => [
+        { title: <b>Time</b>, value: <DateFormatter timeFirst={true} date={new Date(point.x)} /> },
+        { title: <b>Value</b>, value: <NumberFormatter value={point.y} /> },
+        { title: <b>Raw</b>, value: <span>{point.y}</span> },
+      ],
+      []
+    )
+
+    const onMouseLeave = React.useCallback(() => {
+      setTooltip(undefined)
+    }, [])
+
+    const showTooltip = React.useCallback((point: Point, something: { event: MouseEvent }) => {
+      if (!something) {
+        return
+      }
+      setTooltip({ point, value: hintFormatter(point), element: something.event.target as any })
+    }, [])
+
+    const paletteColor =
+      props.theme.palette.type === 'light' ? props.theme.palette.secondary.dark : props.theme.palette.primary.light
+    const color = props.color ? props.color : paletteColor
+
+    const highlightSelectedPoint = useCallback(
+      (point: Point) => {
+        const highlight = tooltip && tooltip.point.x === point.x && tooltip.point.y === point.y
+        return highlight ? emphasize(color, 0.8) : color
+      },
+      [tooltip, color]
+    )
+
+    const formatYAxis = useCallback((num: number) => abbreviate(num), [])
+
+    const xDomain = useCustomXDomain(props)
+    const yDomain = useCustomYDomain(props)
+
+    const data = props.data
+    const hasData = data.length > 0
+    const dummyDomain = [-1, 1]
+    const dummyData = [{ x: -2, y: -2 }]
+    return (
+      <div>
+        <div style={{ height: '150px', width: '100%', position: 'relative' }}>
+          {data.length === 0 ? <NoData /> : null}
+          <XYPlot
+            width={width}
+            height={180}
+            yDomain={hasData ? yDomain : dummyDomain}
+            xDomain={hasData ? xDomain : dummyDomain}
+            onMouseLeave={onMouseLeave}
+          >
+            <HorizontalGridLines />
+            <YAxis width={45} tickFormat={formatYAxis} />
+            <LineMarkSeries
+              color={color}
+              colorType="literal"
+              getColor={highlightSelectedPoint}
+              onValueMouseOver={showTooltip}
+              size={3}
+              data={hasData ? data : dummyData}
+              curve={mapCurveType(props.interpolation)}
+            />
+            <Hint value={{ x: 0, y: 0 }} style={{ pointerEvents: 'none' }}>
+              <TooltipComponent tooltip={tooltip} theme={props.theme} />
+            </Hint>
+          </XYPlot>
+          <ReactResizeDetector handleWidth={true} onResize={detectResize} />
+        </div>
+      </div>
+    )
+  })
+)
@@ -0,0 +1,15 @@
+export interface Point {
+  x: number
+  y: number
+}
+
+export interface Tooltip {
+  value: Array<TooltipRows>
+  point: Point
+  element: Element | null
+}
+
+export interface TooltipRows {
+  title: React.ReactElement
+  value: React.ReactElement
+}
@@ -0,0 +1,27 @@
+import React, { memo } from 'react'
+import { Typography } from '@material-ui/core'
+
+function NoData() {
+  return (
+    <div
+      style={{
+        height: '100%',
+        position: 'absolute',
+        display: 'flex',
+        alignItems: 'center',
+        justifyContent: 'center',
+        width: '100%',
+        color: '#ccc',
+        verticalAlign: 'middle',
+        paddingLeft: '30px',
+        zIndex: 10,
+      }}
+    >
+      <Typography style={{ fontWeight: 'bold' }} variant="h5">
+        No Data
+      </Typography>
+    </div>
+  )
+}
+
+export default memo(NoData)
@@ -0,0 +1,59 @@
+import React, { memo } from 'react'
+import { fade } from '@material-ui/core/styles'
+import { Fade, Grow, Paper, Popper, Theme, Typography, withTheme } from '@material-ui/core'
+import { Tooltip } from './Model'
+
+function TooltipComponent(props: { tooltip?: Tooltip; theme: Theme }) {
+  const { tooltip } = props
+  return (
+    <Popper
+      style={Boolean(tooltip) ? { transition: 'all 0.1s ease-out' } : undefined}
+      open={Boolean(tooltip)}
+      transition={true}
+      placement="top"
+      anchorEl={tooltip && tooltip.element}
+    >
+      <div
+        style={{
+          paddingBottom: '8px',
+          transition: 'all 0.5s ease',
+        }}
+      >
+        <Fade in={Boolean(tooltip)} timeout={300}>
+          <Grow in={Boolean(tooltip)} timeout={300}>
+            <Paper
+              style={{
+                padding: '4px',
+                marginTop: '-12px',
+                backgroundColor: fade(
+                  props.theme.palette.type === 'light'
+                    ? props.theme.palette.background.paper
+                    : props.theme.palette.background.default,
+                  0.7
+                ),
+              }}
+            >
+              <table style={{ lineHeight: '1.25em' }}>
+                <tbody>
+                  {tooltip &&
+                    tooltip.value.map((v: any, idx: number) => (
+                      <tr key={idx}>
+                        <td>
+                          <Typography style={{ lineHeight: '1.2' }}>{v.title}</Typography>
+                        </td>
+                        <td>
+                          <Typography style={{ lineHeight: '1.2' }}>{v.value}</Typography>
+                        </td>
+                      </tr>
+                    ))}
+                </tbody>
+              </table>
+            </Paper>
+          </Grow>
+        </Fade>
+      </div>
+    </Popper>
+  )
+}
+
+export default withTheme(memo(TooltipComponent))
@@ -0,0 +1,10 @@
+import { useMemo } from 'react'
+import { Props } from '../Chart'
+
+export function useCustomXDomain(props: Props): [number, number] | undefined {
+  return useMemo(() => {
+    const lastDataPoint = [...props.data].sort((a, b) => b.x - a.x)[0]
+    const lastDataDate = lastDataPoint ? lastDataPoint.x : Date.now()
+    return props.timeRangeStart ? [Date.now() - props.timeRangeStart, lastDataDate] : undefined
+  }, [props.data, props.timeRangeStart])
+}
@@ -0,0 +1,45 @@
+import { Props } from '../Chart'
+import { useMemo } from 'react'
+import { Point } from '../Model'
+
+function defaultFor(a: number | undefined, b: number) {
+  return a === undefined ? b : a
+}
+
+export function useCustomYDomain(props: Props) {
+  return useMemo(() => {
+    const data = props.data
+    const calculatedDomain = domainForData(data)
+    const yDomain: [number, number] = props.range
+      ? [defaultFor(props.range[0], calculatedDomain[0]), defaultFor(props.range[1], calculatedDomain[1])]
+      : calculatedDomain
+
+    return yDomain
+  }, [props.data, props.range])
+}
+
+function domainForData(data: Array<Point>): [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]
+}
@@ -0,0 +1,17 @@
+import { PlotCurveTypes } from '../../reducers/Charts'
+export 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'
+  }
+}
@@ -1,97 +0,0 @@
-import * as q from '../../../../backend/src/Model'
-import * as React from 'react'
-import TopicPlot from '../TopicPlot'
-import { AppState } from '../../reducers'
-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 onMessage of treeNode
- */
-function useMessageSubscriptionToUpdate(treeNode?: q.TreeNode<any>) {
-  const [lastUpdated, setLastUpdate] = React.useState(0)
-  function subscribeToMessageUpdates() {
-    const onUpdateCallback = throttle(() => setLastUpdate(treeNode ? treeNode.lastUpdate : 0), 300)
-    treeNode && treeNode.onMessage.subscribe(onUpdateCallback)
-
-    return function cleanup() {
-      treeNode && treeNode.onMessage.unsubscribe(onUpdateCallback)
-    }
-  }
-  React.useEffect(subscribeToMessageUpdates, [treeNode])
-}
-
-function Chart(props: Props) {
-  const { parameters, treeNode } = props
-  const [freezedHistory, setHistory] = React.useState<q.MessageHistory | undefined>()
-  useMessageSubscriptionToUpdate(treeNode)
-
-  const togglePause = React.useCallback(() => {
-    if (!props.treeNode) {
-      return
-    }
-    setHistory(freezedHistory ? undefined : props.treeNode.messageHistory.clone())
-  }, [props.treeNode, freezedHistory])
-
-  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(freezedHistory)}
-            togglePause={togglePause}
-          />
-        </div>
-      </div>
-      {props.treeNode ? (
-        <TopicPlot
-          color={props.parameters.color}
-          interpolation={props.parameters.interpolation}
-          range={props.parameters.range ? [props.parameters.range.from, props.parameters.range.to] : undefined}
-          history={freezedHistory ? freezedHistory : props.treeNode.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)
@@ -1,4 +1,4 @@
-import * as React from 'react'
+import React, { useRef } from 'react'
 import Play from '@material-ui/icons/PlayArrow'
 import Pause from '@material-ui/icons/PauseCircleFilled'
 import Clear from '@material-ui/icons/Clear'
@@ -11,16 +11,24 @@ export function ChartActions(props: {
  togglePause: () => void
  parameters: ChartParameters
  onRemove: () => void
+  resetDataAction: () => void
 }) {
+  const menuAnchor = useRef()
  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} />
+      <SettingsButton menuAnchor={menuAnchor} parameters={props.parameters} resetDataAction={props.resetDataAction} />
      <CustomIconButton tooltip="Remove chart" onClick={props.onRemove}>
        <Clear data-test-type="RemoveChart" data-test={`${props.parameters.topic}-${props.parameters.dotPath || ''}`} />
      </CustomIconButton>
+      <div style={{ width: 0, overflow: 'hidden' }}>
+        {/* Helper element to provide an anchor element for the menu,
+         * so the menu prefers not to overlap with the chart
+         */}
+        <div style={{ marginLeft: '11px' }} ref={menuAnchor as any} />
+      </div>
    </div>
  )
 }
@@ -1,4 +1,4 @@
-import * as React from 'react'
+import React, { memo } from 'react'
 import { bindActionCreators } from 'redux'
 import { chartActions } from '../../../actions'
 import { ChartParameters } from '../../../reducers/Charts'
@@ -65,7 +65,4 @@ const mapDispatchToProps = (dispatch: any) => {
  }
 }

-export default connect(
-  undefined,
-  mapDispatchToProps
-)(ColorSettings)
+export default connect(undefined, mapDispatchToProps)(memo(ColorSettings))
@@ -4,7 +4,7 @@ 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'
+import { Menu, MenuItem, Typography } from '@material-ui/core'

 function chartParametersForAction(chart: ChartParameters, action: string) {
  return {
@@ -40,7 +40,7 @@ function InterpolationSettings(props: {
  const menuItems = React.useMemo(() => {
    return curves.map(curve => (
      <MenuItem key={curve} onClick={callbacks[curve]} selected={props.chart.interpolation === curve}>
-        {curve.replace(/_/g, ' ')}
+        <Typography variant="inherit">{curve.replace(/_/g, ' ')}</Typography>
      </MenuItem>
    ))
  }, [curves, props.chart])
@@ -60,7 +60,4 @@ const mapDispatchToProps = (dispatch: any) => {
  }
 }

-export default connect(
-  undefined,
-  mapDispatchToProps
-)(InterpolationSettings)
+export default connect(undefined, mapDispatchToProps)(InterpolationSettings)
@@ -1,9 +1,10 @@
 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 ArrowUpward from '@material-ui/icons/ArrowUpward'
 import { bindActionCreators } from 'redux'
 import { chartActions } from '../../../actions'
+import { ChartParameters } from '../../../reducers/Charts'
+import { connect } from 'react-redux'
+import { MenuItem, Typography, ListItemIcon } from '@material-ui/core'

 function MoveUp(props: { actions: { chart: typeof chartActions }; chart: ChartParameters; close: () => void }) {
  const moveUp = React.useCallback(() => {
@@ -16,7 +17,10 @@ function MoveUp(props: { actions: { chart: typeof chartActions }; chart: ChartPa

  return (
    <MenuItem key="size" onClick={moveUp}>
-      Move up
+      <ListItemIcon>
+        <ArrowUpward />
+      </ListItemIcon>
+      <Typography variant="inherit">Move up</Typography>
    </MenuItem>
  )
 }
@@ -29,7 +33,4 @@ const mapDispatchToProps = (dispatch: any) => {
  }
 }

-export default connect(
-  undefined,
-  mapDispatchToProps
-)(MoveUp)
+export default connect(undefined, mapDispatchToProps)(MoveUp)
@@ -56,8 +56,8 @@ function RangeSettings(props: Props) {
        onClose={props.onClose}
        onKeyDownCapture={handleKeyEvents}
      >
-        <Typography>Define custom ranges for the Y-Axis</Typography>
-        <div style={{ padding: '0 16px' }}>
+        <div style={{ padding: '0 16px', width: '275px' }}>
+          <Typography>Define custom ranges for the Y-Axis</Typography>
          <TextField
            inputProps={{
              ref: rangeFromRef,
@@ -95,10 +95,7 @@ const mapDispatchToProps = (dispatch: any) => {
  }
 }

-export default connect(
-  undefined,
-  mapDispatchToProps
-)(RangeSettings)
+export default connect(undefined, mapDispatchToProps)(RangeSettings)

 function useRangeStateToFireUpdateAction(
  rangeFrom: string | number | undefined,
@@ -4,9 +4,12 @@ import CustomIconButton from '../../helper/CustomIconButton'
 import MoreVertIcon from '@material-ui/icons/Settings'
 import { ChartParameters } from '../../../reducers/Charts'

-export function SettingsButton(props: { parameters: ChartParameters }) {
+export function SettingsButton(props: {
+  parameters: ChartParameters
+  resetDataAction: () => void
+  menuAnchor: React.MutableRefObject<undefined>
+}) {
  const [visible, setVisible] = React.useState(false)
-  const settingsRef = React.useRef()
  const toggleSettings = React.useCallback(() => {
    setVisible(!visible)
  }, [visible])
@@ -17,10 +20,15 @@ export function SettingsButton(props: { parameters: ChartParameters }) {

  return (
    <span>
-      <ChartSettings open={visible} close={close} anchorEl={settingsRef} chart={props.parameters} />
+      <ChartSettings
+        open={visible}
+        close={close}
+        anchorEl={props.menuAnchor}
+        chart={props.parameters}
+        resetDataAction={props.resetDataAction}
+      />
      <CustomIconButton tooltip="Chart settings" onClick={toggleSettings}>
        <MoreVertIcon
-          ref={settingsRef as any}
          data-test-type="ChartSettings"
          data-test={`${props.parameters.topic}-${props.parameters.dotPath || ''}`}
        />
@@ -1,4 +1,4 @@
-import * as React from 'react'
+import React, { memo } from 'react'
 import { ChartParameters } from '../../../reducers/Charts'
 import { Menu, MenuItem, TextField, Typography } from '@material-ui/core'
 import { connect } from 'react-redux'
@@ -24,16 +24,16 @@ function Size(props: {
  return (
    <Menu anchorEl={props.anchorEl} open={props.open} onClose={props.close}>
      <MenuItem selected={props.chart.width === undefined} onClick={setChartWidth()}>
-        auto
+        <Typography variant="inherit">auto</Typography>
      </MenuItem>
      <MenuItem selected={props.chart.width === 'big'} onClick={setChartWidth('big')}>
-        100% width
+        <Typography variant="inherit">100% width</Typography>
      </MenuItem>
      <MenuItem selected={props.chart.width === 'medium'} onClick={setChartWidth('medium')}>
-        50% width
+        <Typography variant="inherit">50% width</Typography>
      </MenuItem>
      <MenuItem selected={props.chart.width === 'small'} onClick={setChartWidth('small')}>
-        33% width
+        <Typography variant="inherit">33% width</Typography>
      </MenuItem>
    </Menu>
  )
@@ -47,7 +47,4 @@ const mapDispatchToProps = (dispatch: any) => {
  }
 }

-export default connect(
-  undefined,
-  mapDispatchToProps
-)(Size)
+export default connect(undefined, mapDispatchToProps)(memo(Size))
@@ -0,0 +1,99 @@
+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)
@@ -1,22 +1,31 @@
-import * as React from 'react'
-import InterpolationSettings from './InterpolationSettings'
-import { ChartParameters } from '../../../reducers/Charts'
-import { Menu, MenuItem } from '@material-ui/core'
-import RangeSettings from './RangeSettings'
-import Size from './Size'
-import MoveUp from './MoveUp'
+import BarChart from '@material-ui/icons/BarChart'
+import Clear from '@material-ui/icons/Refresh'
+import ColorLens from '@material-ui/icons/ColorLens'
 import ColorSettings from './ColorSettings'
+import InterpolationSettings from './InterpolationSettings'
+import MoveUp from './MoveUp'
+import MultilineChart from '@material-ui/icons/MultilineChart'
+import RangeSettings from './RangeSettings'
+import React, { memo } from 'react'
+import Size from './Size'
+import Sort from '@material-ui/icons/Sort'
+import TimeRangeSettings from './TimeRangeSettings'
+import { ChartParameters } from '../../../reducers/Charts'
+import { Menu, MenuItem, ListItemIcon, Typography } from '@material-ui/core'

 function ChartSettings(props: {
  open: boolean
  close: () => void
+  resetDataAction: () => 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 open = props.open

  const toggleRange = React.useCallback(() => {
    if (open) {
@@ -25,6 +34,13 @@ function ChartSettings(props: {
    setRangeVisible(!rangeVisible)
  }, [rangeVisible, open])

+  const toggleTimeRange = React.useCallback(() => {
+    if (open) {
+      props.close()
+    }
+    setTimeRangeVisible(!timeRangeVisible)
+  }, [timeRangeVisible, open])
+
  const toggleInterpolation = React.useCallback(() => {
    if (open) {
      props.close()
@@ -50,20 +66,50 @@ function ChartSettings(props: {
    <span>
      <Menu id="long-menu" anchorEl={props.anchorEl.current} open={props.open} onClose={props.close}>
        <MenuItem key="range" onClick={toggleRange}>
-          Set range
+          <ListItemIcon>
+            <BarChart />
+          </ListItemIcon>
+          <Typography variant="inherit">Y-Axis range (Values)</Typography>
+        </MenuItem>
+        <MenuItem key="timeRange" onClick={toggleTimeRange}>
+          <ListItemIcon>
+            <BarChart />
+          </ListItemIcon>
+          <Typography variant="inherit">X-Axis range (Time)</Typography>
        </MenuItem>
        <MenuItem key="interpolation" onClick={toggleInterpolation}>
-          Curve interpolation
+          <ListItemIcon>
+            <MultilineChart />
+          </ListItemIcon>
+          <Typography variant="inherit">Curve interpolation</Typography>
        </MenuItem>
        <MenuItem key="size" onClick={toggleSize}>
-          Size
+          <ListItemIcon>
+            <Sort />
+          </ListItemIcon>
+          <Typography variant="inherit">Size</Typography>
        </MenuItem>
        <MenuItem key="color" onClick={toggleColor}>
-          Color
+          <ListItemIcon>
+            <ColorLens />
+          </ListItemIcon>
+          <Typography variant="inherit">Color</Typography>
+        </MenuItem>
+        <MenuItem key="clear" onClick={props.resetDataAction}>
+          <ListItemIcon>
+            <Clear />
+          </ListItemIcon>
+          <Typography variant="inherit">Clear data</Typography>
        </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}
@@ -76,4 +122,4 @@ function ChartSettings(props: {
  )
 }

-export default ChartSettings
+export default memo(ChartSettings)
@@ -1,7 +1,8 @@
 import * as q from '../../../../backend/src/Model'
-import * as React from 'react'
-import Chart from './Chart'
+import React from 'react'
+import TopicChart from './TopicChart'
 import { ChartParameters } from '../../reducers/Charts'
+import { usePollingToFetchTreeNode } from '../helper/usePollingToFetchTreeNode'

 interface Props {
  tree?: q.Tree<any>
@@ -14,37 +15,6 @@ export function ChartWithTreeNode(props: Props) {
    return null
  }

-  const initialTreeNode = tree.findNode(parameters.topic)
-  const [treeNode, setTreeNode] = React.useState<q.TreeNode<any> | undefined>(initialTreeNode)
-
-  usePollingToFetchTreeNode(treeNode, tree, parameters.topic, setTreeNode)
-  return <Chart treeNode={treeNode} parameters={parameters} />
-}
-
-/**
- * If a node is not available when the plot is shown, keep polling until it has been created
- */
-function usePollingToFetchTreeNode(
-  treeNode: q.TreeNode<any> | undefined,
-  tree: q.Tree<any>,
-  path: string,
-  setTreeNode: React.Dispatch<React.SetStateAction<q.TreeNode<any> | undefined>>
-) {
-  function pollUntilTreeNodeHasBeenFound() {
-    let intervalTimer: any
-    if (!treeNode) {
-      intervalTimer = setInterval(() => {
-        const node = tree.findNode(path)
-        if (node) {
-          setTreeNode(node)
-          clearInterval(intervalTimer)
-        }
-      }, 500)
-    }
-    return function cleanup() {
-      intervalTimer && clearInterval(intervalTimer)
-    }
-  }
-
-  React.useEffect(pollUntilTreeNodeHasBeenFound, [])
+  const treeNode = usePollingToFetchTreeNode(tree, parameters.topic)
+  return <TopicChart treeNode={treeNode} parameters={parameters} />
 }
@@ -0,0 +1,136 @@
+import * as q from '../../../../backend/src/Model'
+import ChartTitle from './ChartTitle'
+import React, { useState, useCallback, memo, useRef } from 'react'
+import TopicPlot from '../TopicPlot'
+import { bindActionCreators } from 'redux'
+import { ChartActions } from './ChartActions'
+import { chartActions } from '../../actions'
+import { ChartParameters } from '../../reducers/Charts'
+import { connect } from 'react-redux'
+import { Paper } from '@material-ui/core'
+const throttle = require('lodash.throttle')
+
+class ClearableMessageBuffer extends q.RingBuffer<q.Message> {
+  public clear() {
+    this.items = []
+    this.start = 0
+    this.end = 0
+  }
+
+  public static fromMessageBuffer(buffer: q.RingBuffer<q.Message>): ClearableMessageBuffer {
+    return new ClearableMessageBuffer(buffer.capacity, buffer.maxItems, buffer.compactionFactor, buffer)
+  }
+
+  public clone(): ClearableMessageBuffer {
+    return ClearableMessageBuffer.fromMessageBuffer(this)
+  }
+}
+
+interface Props {
+  parameters: ChartParameters
+  treeNode?: q.TreeNode<any>
+  actions: {
+    chart: typeof chartActions
+  }
+}
+
+/**
+ * Subscribes to onMessages, stores more data points then the default
+ */
+function useMessageSubscriptionToUpdate(treeNode?: q.TreeNode<any>) {
+  const [lastUpdated, setLastUpdate] = useState(0)
+  const [messageHistory, setMessageHistory] = useState<ClearableMessageBuffer | undefined>()
+  let amendMessageCallback: any
+
+  function subscribeToMessageUpdates() {
+    const throttledUpdate = throttle(() => setLastUpdate(treeNode ? treeNode.lastUpdate : 0), 300)
+
+    if (treeNode) {
+      const newMessageHistory = ClearableMessageBuffer.fromMessageBuffer(treeNode.messageHistory)
+      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)
+      setMessageHistory(undefined)
+    }
+  }
+  React.useEffect(subscribeToMessageUpdates, [treeNode])
+
+  return messageHistory
+}
+
+function useResetDataCallback(messageHistory: ClearableMessageBuffer | undefined) {
+  const [lastUpdated, setLastUpdate] = useState(0)
+
+  return React.useCallback(() => {
+    messageHistory && messageHistory.clear()
+    setLastUpdate(Date.now())
+  }, [messageHistory])
+}
+
+function TopicChart(props: Props) {
+  const { parameters, treeNode } = props
+  const [frozenHistory, setFrozenHistory] = useState<q.MessageHistory | undefined>()
+  const messageHistory = useMessageSubscriptionToUpdate(treeNode)
+
+  const togglePause = useCallback(() => {
+    if (!treeNode) {
+      return
+    }
+
+    setFrozenHistory(frozenHistory ? undefined : messageHistory && messageHistory.clone())
+  }, [props.treeNode, frozenHistory, messageHistory])
+
+  const onRemove = React.useCallback(() => {
+    props.actions.chart.removeChart(props.parameters)
+  }, [props.parameters])
+
+  const resetData = useResetDataCallback(messageHistory)
+
+  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
+            resetDataAction={resetData}
+            parameters={parameters}
+            onRemove={onRemove}
+            paused={Boolean(frozenHistory)}
+            togglePause={togglePause}
+          />
+        </div>
+      </div>
+      <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 || new ClearableMessageBuffer(1)}
+        dotPath={parameters.dotPath}
+      />
+    </Paper>
+  )
+}
+
+const mapDispatchToProps = (dispatch: any) => {
+  return {
+    actions: {
+      chart: bindActionCreators(chartActions, dispatch),
+    },
+  }
+}
+
+export default connect(undefined, mapDispatchToProps)(memo(TopicChart))
@@ -126,7 +126,4 @@ const styles = (theme: Theme) => ({
  },
 })

-export default connect(
-  mapStateToProps,
-  mapDispatchToProps
-)(withStyles(styles)(ChartPanel))
+export default connect(mapStateToProps, mapDispatchToProps)(withStyles(styles)(ChartPanel))
@@ -0,0 +1,61 @@
+import React, { useRef, useCallback, memo } from 'react'
+import { ConfirmationRequest } from '../reducers/Global'
+import { Dialog, DialogTitle, DialogContent, DialogContentText, DialogActions, Button } from '@material-ui/core'
+import { KeyCodes } from '../utils/KeyCodes'
+
+function ConfirmationDialog(props: { confirmationRequests: Array<ConfirmationRequest> }) {
+  const request = props.confirmationRequests[0]
+  const yesRef = useRef<HTMLButtonElement>()
+  const noRef = useRef<HTMLButtonElement>()
+  const arrowKeyHandler = useCallback((event: React.KeyboardEvent) => {
+    const isArrowKey = event.keyCode === KeyCodes.arrow_left || event.keyCode === KeyCodes.arrow_right
+    if (!isArrowKey) {
+      return
+    }
+
+    event.stopPropagation()
+    if (document.activeElement === noRef.current) {
+      yesRef.current && yesRef.current.focus()
+    } else {
+      noRef.current && noRef.current.focus()
+    }
+  }, [])
+
+  const confirm = React.useCallback(() => {
+    request && request.callback(true)
+  }, [request])
+  const reject = React.useCallback(() => {
+    request && request.callback(false)
+  }, [request])
+
+  if (!request) {
+    return null
+  }
+
+  return (
+    <Dialog
+      open={true}
+      onClose={reject}
+      aria-labelledby="alert-dialog-title"
+      aria-describedby="alert-dialog-description"
+      onKeyDown={arrowKeyHandler}
+    >
+      <DialogTitle id="alert-dialog-title">{request.title}</DialogTitle>
+      <DialogContent>
+        <DialogContentText id="alert-dialog-description" style={{ whiteSpace: 'pre-wrap' }}>
+          {request.inquiry}
+        </DialogContentText>
+      </DialogContent>
+      <DialogActions>
+        <Button ref={yesRef as any} variant="contained" onClick={confirm} color="primary" autoFocus>
+          Yes
+        </Button>
+        <Button ref={noRef as any} variant="contained" onClick={reject} color="secondary" style={{ marginLeft: '8px' }}>
+          No
+        </Button>
+      </DialogActions>
+    </Dialog>
+  )
+}
+
+export default memo(ConfirmationDialog)
@@ -1,7 +1,6 @@
 import * as React from 'react'
+import { useState, useCallback, memo } 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'
@@ -9,18 +8,10 @@ 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'
+import { Button, Grid, TextField, Tooltip } from '@material-ui/core'
+import { QosSelect } from '../QosSelect'
+import { QoS } from '../../../../backend/src/DataSource/MqttSource'
+import Subscriptions from './Subscriptions'

 interface Props {
  connection: ConnectionOptions
@@ -28,116 +19,93 @@ interface Props {
  managerActions: typeof connectionManagerActions
 }

-interface State {
-  subscription: string
-}
+const ConnectionSettings = memo(function ConnectionSettings(props: Props) {
+  const [qos, setQos] = useState<QoS>(0)
+  const [topic, setTopic] = useState('')
+  const { classes } = props

-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 updateSubscription = useCallback(
+    (event: React.ChangeEvent<HTMLInputElement>) => setTopic(event.target.value),
+    []
  )
-}
+
+  const handleChange = useCallback(
+    (name: string) => (event: any) => {
+      props.managerActions.updateConnection(props.connection.id, {
+        [name]: event.target.value,
+      })
+    },
+    []
+  )
+
+  return (
+    <div>
+      <form className={classes.container} noValidate={true} autoComplete="off">
+        <Grid container={true} spacing={3}>
+          <Grid item={true} xs={8} className={classes.gridPadding}>
+            <TextField
+              className={`${classes.fullWidth} advanced-connection-settings-topic-input`}
+              label="Topic"
+              placeholder="example/topic"
+              margin="normal"
+              value={topic}
+              onChange={updateSubscription}
+            />
+          </Grid>
+          <Grid item={true} xs={2} className={classes.gridPadding}>
+            <div className={classes.qos}>
+              <QosSelect label="QoS" selected={qos} onChange={setQos} />
+            </div>
+          </Grid>
+          <Grid item={true} xs={2} className={classes.gridPadding}>
+            <Button
+              className={classes.button}
+              color="secondary"
+              onClick={() => props.managerActions.addSubscription({ topic, qos }, props.connection.id)}
+              variant="contained"
+            >
+              <Add /> Add
+            </Button>
+          </Grid>
+          <Grid item={true} xs={12} style={{ padding: 0 }}>
+            <Subscriptions connection={props.connection} />
+          </Grid>
+          <Grid item={true} xs={7} className={classes.gridPadding}>
+            <TextField
+              className={classes.fullWidth}
+              label="MQTT Client ID"
+              margin="normal"
+              value={props.connection.clientId}
+              onChange={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={() => props.managerActions.toggleCertificateSettings()}
+                >
+                  <Lock /> Certificates
+                </Button>
+              </Tooltip>
+            </div>
+          </Grid>
+          <Grid item={true} xs={2} className={classes.gridPadding}>
+            <Button
+              variant="contained"
+              className={classes.button}
+              onClick={props.managerActions.toggleAdvancedSettings}
+            >
+              <Undo /> Back
+            </Button>
+          </Grid>
+        </Grid>
+      </form>
+    </div>
+  )
+})

 const mapDispatchToProps = (dispatch: any) => {
  return {
@@ -152,19 +120,13 @@ const styles = (theme: Theme) => ({
  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',
  },
+  qos: {
+    marginTop: theme.spacing(1),
+  },
 })

-export default connect(
-  undefined,
-  mapDispatchToProps
-)(withStyles(styles)(ConnectionSettings))
+export default connect(undefined, mapDispatchToProps)(withStyles(styles)(ConnectionSettings))
@@ -1,7 +1,5 @@
 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'
@@ -81,7 +79,4 @@ const styles = (theme: Theme) => ({
  },
 })

-export default connect(
-  undefined,
-  mapDispatchToProps
-)(withStyles(styles)(CertificateFileSelection))
+export default connect(undefined, mapDispatchToProps)(withStyles(styles)(CertificateFileSelection))
@@ -18,7 +18,7 @@ interface State {
  subscription: string
 }

-class Certificates extends React.Component<Props, State> {
+class Certificates extends React.PureComponent<Props, State> {
  constructor(props: any) {
    super(props)
    this.state = { subscription: '' }
@@ -104,7 +104,4 @@ const styles = (theme: Theme) => ({
  },
 })

-export default connect(
-  undefined,
-  mapDispatchToProps
-)(withStyles(styles)(Certificates))
+export default connect(undefined, mapDispatchToProps)(withStyles(styles)(Certificates))
@@ -1,7 +1,7 @@
 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 Delete from '@material-ui/icons/Delete'
 import Settings from '@material-ui/icons/Settings'
 import Visibility from '@material-ui/icons/Visibility'
 import VisibilityOff from '@material-ui/icons/VisibilityOff'
@@ -285,7 +285,4 @@ const styles = (theme: Theme) => ({
  },
 })

-export default connect(
-  mapStateToProps,
-  mapDispatchToProps
-)(withStyles(styles)(ConnectionSettings))
+export default connect(mapStateToProps, mapDispatchToProps)(withStyles(styles)(ConnectionSettings))
@@ -20,7 +20,7 @@ interface Props {
  showCertificateSettings: boolean
 }

-class ConnectionSetup extends React.Component<Props, {}> {
+class ConnectionSetup extends React.PureComponent<Props, {}> {
  constructor(props: Props) {
    super(props)
  }
@@ -95,9 +95,10 @@ const styles = (theme: Theme) => ({
    borderRadius: `${theme.shape.borderRadius}px 0 0 ${theme.shape.borderRadius}px`,
    paddingTop: theme.spacing(2),
    flex: 3,
-    overflow: 'hidden',
+    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`,
@@ -133,7 +134,4 @@ const mapDispatchToProps = (dispatch: any) => {
  }
 }

-export default connect(
-  mapStateToProps,
-  mapDispatchToProps
-)(withStyles(styles)(ConnectionSetup))
+export default connect(mapStateToProps, mapDispatchToProps)(withStyles(styles)(ConnectionSetup))
@@ -51,7 +51,4 @@ export const connectionItemStyle = (theme: Theme) => ({
  },
 })

-export default connect(
-  null,
-  mapDispatchToProps
-)(withStyles(connectionItemStyle)(ConnectionItem))
+export default connect(null, mapDispatchToProps)(withStyles(connectionItemStyle)(ConnectionItem))
@@ -6,10 +6,10 @@ 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'
-import { KeyCodes } from '../../../utils/KeyCodes'

 interface Props {
  classes: any
@@ -39,10 +39,10 @@ function ProfileList(props: Props) {
  useGlobalKeyEventHandler(KeyCodes.arrow_up, selectConnection('previous'))

  const createConnectionButton = (
-    <ListSubheader component="div">
+    <div style={{ padding: '8px 16px' }}>
      <AddButton action={actions.createConnection} />
      Connections
-    </ListSubheader>
+    </div>
  )

  return (
@@ -77,7 +77,4 @@ const mapStateToProps = (state: AppState) => {
  }
 }

-export default connect(
-  mapStateToProps,
-  mapDispatchToProps
-)(withStyles(styles)(ProfileList))
+export default connect(mapStateToProps, mapDispatchToProps)(withStyles(styles)(ProfileList))
@@ -0,0 +1,90 @@
+import React, { useCallback, useState } from 'react'
+import Delete from '@material-ui/icons/Delete'
+import { connectionManagerActions } from '../../actions'
+import { ConnectionOptions } from '../../model/ConnectionOptions'
+import {
+  IconButton,
+  TableContainer,
+  Table,
+  TableHead,
+  TableRow,
+  TableCell,
+  TableBody,
+  Paper,
+  Theme,
+} from '@material-ui/core'
+import { bindActionCreators } from 'redux'
+import { withStyles } from '@material-ui/styles'
+import { connect } from 'react-redux'
+
+function Subscriptions(props: {
+  classes: any
+  connection: ConnectionOptions
+  managerActions: typeof connectionManagerActions
+}) {
+  const { classes, connection, managerActions } = props
+
+  return (
+    <TableContainer component={Paper} className={`${classes.topicList} advanced-connection-settings-topic-list`}>
+      <Table size="small">
+        <TableHead>
+          <TableRow>
+            <TableCell align="left" padding="checkbox" className={classes.tableTitleCell}></TableCell>
+            <TableCell className={classes.tableTitleCell}>Topic</TableCell>
+            <TableCell align="right" className={classes.tableTitleCell}>
+              QoS
+            </TableCell>
+          </TableRow>
+        </TableHead>
+        <TableBody>
+          {connection.subscriptions.map(subscription => (
+            <TableRow key={subscription.topic + '_qos_' + subscription.qos}>
+              <TableCell align="right" className={classes.tableCell}>
+                <IconButton
+                  onClick={() => managerActions.deleteSubscription(subscription, connection.id)}
+                  style={{ padding: '6px' }}
+                >
+                  <Delete />
+                </IconButton>
+              </TableCell>
+
+              <TableCell component="th" scope="row" className={classes.tableCell}>
+                {subscription.topic}
+              </TableCell>
+              <TableCell align="right" className={classes.tableCell}>
+                {subscription.qos}
+              </TableCell>
+            </TableRow>
+          ))}
+        </TableBody>
+      </Table>
+    </TableContainer>
+  )
+}
+
+const mapDispatchToProps = (dispatch: any) => {
+  return {
+    managerActions: bindActionCreators(connectionManagerActions, dispatch),
+  }
+}
+
+const styles = (theme: Theme) => ({
+  tableCell: {
+    paddingTop: 0,
+    paddingBottom: 0,
+    wordBbreak: 'break-word',
+  },
+  tableTitleCell: {
+    paddingTop: `${theme.spacing(0.5)}px`,
+    paddingBottom: `${theme.spacing(0.5)}px`,
+  },
+  topicList: {
+    height: '196px',
+    overflowY: 'scroll' as 'scroll',
+    margin: `${theme.spacing(1)}px ${theme.spacing(1)}px 0 ${theme.spacing(1)}px`,
+    backgroundColor: theme.palette.background.default,
+    width: 'auto',
+  },
+})
+
+export default connect(undefined, mapDispatchToProps)(withStyles(styles)(Subscriptions))
@@ -5,7 +5,7 @@ let heapdump: any

 function writeHeapdump(path?: string) {
  if (!heapdump) {
-    heapdump = require('heapdump')
+    //<heapdump = require('heapdump')
  }

  heapdump.writeSnapshot(path || `${Date.now()}.heapsnapshot`)
@@ -2,7 +2,6 @@ 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'

@@ -14,7 +13,7 @@ interface Props {
  classes: any
 }

-class ErrorBoundary extends React.Component<Props, State> {
+class ErrorBoundary extends React.PureComponent<Props, State> {
  public static getDerivedStateFromError(error: Error) {
    return { error }
  }
@@ -33,7 +32,7 @@ class ErrorBoundary extends React.Component<Props, State> {
  }

  public componentDidCatch(error: Error, errorInfo: any) {
-    electronRendererTelemetry.trackError(error)
+    // electronRendererTelemetry.trackError(error)
    console.log('did catch', error)
  }

@@ -11,7 +11,7 @@ interface Props {
  classes: any
 }

-class Notification extends React.Component<Props, {}> {
+class Notification extends React.PureComponent<Props, {}> {
  constructor(props: Props) {
    super(props)
  }
@@ -28,7 +28,7 @@ interface Props {
  tree?: q.Tree<any>
 }

-class PauseButton extends React.Component<Props, { changes: number }> {
+class PauseButton extends React.PureComponent<Props, { changes: number }> {
  private timer?: any
  constructor(props: Props) {
    super(props)
@@ -102,7 +102,4 @@ const mapDispatchToProps = (dispatch: any) => {
  }
 }

-export default connect(
-  mapStateToProps,
-  mapDispatchToProps
-)(withStyles(styles)(PauseButton))
+export default connect(mapStateToProps, mapDispatchToProps)(withStyles(styles)(PauseButton))
@@ -35,6 +35,7 @@ function SearchBar(props: {

  useGlobalKeyEventHandler(undefined, event => {
    const isCharacter = event.key.length === 1
+    const isModifierKey = event.metaKey || event.ctrlKey
    const isAllowedControlCharacter = event.keyCode === KeyCodes.backspace || event.keyCode === KeyCodes.delete
    const tagNameBlacklist = ['INPUT', 'TEXTAREA', 'RADIO', 'CHECKBOX', 'OPTION', 'FORM']

@@ -43,6 +44,7 @@ function SearchBar(props: {

    if (
      (isCharacter || isAllowedControlCharacter) &&
+      !isModifierKey &&
      !event.defaultPrevented &&
      !hasFocus &&
      tagElementIsNotBlacklisted &&
@@ -140,7 +142,4 @@ const styles = (theme: Theme) => ({
  },
 })

-export default connect(
-  mapStateToProps,
-  mapDispatchToProps
-)(withStyles(styles)(SearchBar))
+export default connect(mapStateToProps, mapDispatchToProps)(withStyles(styles)(SearchBar))
@@ -32,6 +32,8 @@ const styles = (theme: Theme) => ({
  },
  disconnect: {
    margin: 'auto 8px auto auto',
+  },
+  disconnectLabel: {
    color: theme.palette.primary.contrastText,
  },
 })
@@ -46,7 +48,7 @@ interface Props {
  topicFilter?: string
 }

-class TitleBar extends React.Component<Props, {}> {
+class TitleBar extends React.PureComponent<Props, {}> {
  constructor(props: any) {
    super(props)
    this.state = {}
@@ -71,7 +73,11 @@ class TitleBar extends React.Component<Props, {}> {
          </Typography>
          <SearchBar />
          <PauseButton />
-          <Button className={classes.disconnect} onClick={actions.connection.disconnect}>
+          <Button
+            className={classes.disconnect}
+            classes={{ label: classes.disconnectLabel }}
+            onClick={actions.connection.disconnect}
+          >
            Disconnect <CloudOff className={classes.disconnectIcon} />
          </Button>
          <ConnectionHealthIndicator withBackground={true} />
@@ -97,7 +103,4 @@ const mapDispatchToProps = (dispatch: any) => {
  }
 }

-export default connect(
-  mapStateToProps,
-  mapDispatchToProps
-)(withStyles(styles)(TitleBar))
+export default connect(mapStateToProps, mapDispatchToProps)(withStyles(styles)(TitleBar))
@@ -1,18 +1,8 @@
 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'
+import { QoS } from '../../../backend/src/DataSource/MqttSource'

-interface Props {
-  qos: 0 | 1 | 2
-  actions: {
-    publish: typeof publishActions
-  }
-}
-
-function QosSelect(props: Props) {
+export function QosSelect(props: { selected: QoS; onChange: (value: QoS) => void; label?: string }) {
  const tooltipStyle = { textAlign: 'center' as 'center', width: '100%' }
  const itemStyle = { padding: '0' }

@@ -22,16 +12,16 @@ function QosSelect(props: Props) {
      if (value !== 0 && value !== 1 && value !== 2) {
        return
      }
-
-      props.actions.publish.setQoS(value)
+      props.onChange(value)
    },
-    [props.actions.publish]
+    [props.onChange]
  )

  return (
    <TextField
      select={true}
-      value={props.qos}
+      label={props.label}
+      value={props.selected}
      margin="normal"
      style={{ margin: '8px 0 8px 8px' }}
      onChange={onChangeQos}
@@ -55,21 +45,4 @@ function QosSelect(props: Props) {
  )
 }

-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)
+export default React.memo(QosSelect)
@@ -1,13 +1,13 @@
 import * as q from '../../../../backend/src/Model'
-import * as React from 'react'
+import React, { useMemo } from 'react'
 import { AppState } from '../../reducers'
+import { Base64Message } from '../../../../backend/src/Model/Base64Message'
 import { connect } from 'react-redux'
-import { StyleRulesCallback, withStyles, Theme } from '@material-ui/core/styles'
+import { Theme, withStyles } from '@material-ui/core/styles'
 import { TopicViewModel } from '../../model/TopicViewModel'
 import { Typography } from '@material-ui/core'
-import { Base64Message } from '../../../../backend/src/Model/Base64Message'
-import teal from '@material-ui/core/colors/teal'
-
+import { usePollingToFetchTreeNode } from '../helper/usePollingToFetchTreeNode'
+import { useUpdateComponentWhenNodeUpdates } from '../helper/useUpdateComponentWhenNodeUpdates'
 const abbreviate = require('number-abbreviate')

 interface Stats {
@@ -16,10 +16,6 @@ interface Stats {
 }

 const styles = (theme: Theme) => ({
-  flex: {
-    display: 'flex',
-    width: '100%',
-  },
  container: {
    width: '100%',
    height: '224px',
@@ -34,24 +30,13 @@ interface Props {
  tree?: q.Tree<TopicViewModel>
 }

-class BrokerStatistics extends React.Component<Props, {}> {
-  constructor(props: any) {
-    super(props)
-    this.state = {}
-  }
+function BrokerStatistics(props: Props) {
+  const { tree, classes } = props
+  const sysTopic = usePollingToFetchTreeNode(props.tree, '$SYS')
+  useUpdateComponentWhenNodeUpdates(sysTopic)

-  private renderPair(tree: q.Tree<TopicViewModel>, a: Stats, b: Stats) {
-    return (
-      <div className={this.props.classes.flex}>
-        <div style={{ flex: 1 }}>{this.renderStat(tree, a)}</div>
-        <div style={{ flex: 1 }}>{this.renderStat(tree, b)}</div>
-      </div>
-    )
-  }
-
-  public render() {
-    const { tree, classes } = this.props
-    if (!tree || !tree.findNode('$SYS/broker/clients/total')) {
+  return useMemo(() => {
+    if (!Boolean(sysTopic)) {
      return null
    }

@@ -94,38 +79,20 @@ class BrokerStatistics extends React.Component<Props, {}> {
      },
    }

-    return (
-      <div className={classes.container}>
-        {this.renderStat(tree, stats.broker)}
-        {this.renderPair(tree, stats.sent, stats.received)}
-        {this.renderPair(tree, stats.clients, stats.subscriptions)}
-        {this.renderPair(tree, stats.sent5m, stats.received5m)}
-        {this.renderPair(tree, stats.heap, stats.heapMax)}
-      </div>
-    )
-  }
-
-  public renderStat(tree: q.Tree<TopicViewModel>, stat: Stats) {
-    const node = tree.findNode(stat.topic)
-    if (!node || !node.message) {
+    if (!tree) {
      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 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, props.classes])
 }

 const mapStateToProps = (state: AppState) => {
@@ -135,3 +102,39 @@ const mapStateToProps = (state: AppState) => {
 }

 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.payload ? Base64Message.toUnicodeString(node.message.payload) : ''
+  let value = node.message && node.message.payload ? 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>
+  )
+}
@@ -90,7 +90,7 @@ interface Props {
  theme: 'light' | 'dark'
 }

-class Settings extends React.Component<Props, {}> {
+class Settings extends React.PureComponent<Props, {}> {
  constructor(props: any) {
    super(props)
    this.state = {}
@@ -255,9 +255,4 @@ const mapDispatchToProps = (dispatch: any) => {
  }
 }

-export default withStyles(styles)(
-  connect(
-    mapStateToProps,
-    mapDispatchToProps
-  )(Settings)
-)
+export default withStyles(styles)(connect(mapStateToProps, mapDispatchToProps)(Settings))
@@ -3,10 +3,17 @@ 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 { Input, InputLabel, MenuItem, Select, Theme } from '@material-ui/core'
 import { settingsActions } from '../../actions'
 import { withStyles } from '@material-ui/styles'
-const moment = require('moment/min/moment-with-locales')
+
+function importAll(r: any) {
+  r.keys().forEach(r)
+}
+// @ts-expect-error -- webpack require
+importAll(require.context('moment/locale', true, /\.js$/))
+
+const moment = require('moment')

 interface Props {
  actions: {
@@ -82,9 +89,4 @@ const styles = (theme: Theme) => ({
  },
 })

-export default withStyles(styles)(
-  connect(
-    mapStateToProps,
-    mapDispatchToProps
-  )(TimeLocaleSettings)
-)
+export default withStyles(styles)(connect(mapStateToProps, mapDispatchToProps)(TimeLocaleSettings))
@@ -85,7 +85,4 @@ const mapDispatchToProps = (dispatch: any) => {
  }
 }

-export default connect(
-  undefined,
-  mapDispatchToProps
-)(ChartPreview)
+export default connect(undefined, mapDispatchToProps)(ChartPreview)
@@ -8,7 +8,7 @@ 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 { withStyles, Typography } from '@material-ui/core'
 import 'prismjs/components/prism-json'

 interface Props {
@@ -17,12 +17,13 @@ interface Props {
  current: string
  nameOfCompareMessage: string
  language?: 'json'
+  title?: string
  classes: any
 }

 interface State {}

-class CodeDiff extends React.Component<Props, State> {
+class CodeDiff extends React.PureComponent<Props, State> {
  private handleCtrlA = selectTextWithCtrlA({ targetSelector: 'pre ~ pre' })

  constructor(props: Props) {
@@ -42,9 +43,9 @@ class CodeDiff extends React.Component<Props, State> {
  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
-    >
+    return allLiterals.map((l: JsonPropertyLocation) =>
+      isPlottable(l.value) ? l : undefined
+    ) as Array<JsonPropertyLocation>
  }

  private renderStyledCodeLines(changes: Array<Diff.Change>) {
@@ -88,7 +89,8 @@ class CodeDiff extends React.Component<Props, State> {
    const code = this.renderStyledCodeLines(changes)

    return (
-      <div>
+      <div style={{ marginTop: '8px' }}>
+        {this.props.title ? <Typography className={this.props.classes.title}>{this.props.title}</Typography> : null}
        <div tabIndex={0} onKeyDown={this.handleCtrlA} className={this.props.classes.codeWrapper}>
          <Gutters
            className={this.props.classes.gutters}
@@ -11,6 +11,11 @@ export const style = (theme: Theme) => {
  }

  return {
+    title: {
+      font: codeBaseStyle.font,
+      paddingLeft: '4px',
+      backgroundColor: codeBlockColors.gutters,
+    },
    line: {
      lineHeight: 'normal' as 'normal',
      paddingLeft: '4px',
@@ -22,7 +27,6 @@ export const style = (theme: Theme) => {
      maxHeight: '15em',
      overflow: 'auto',
      backgroundColor: `${codeBlockColors.background}`,
-      margin: '8px 0 0 0',
    },
    gutters: {
      ...codeBaseStyle,
@@ -1,7 +1,7 @@
-import * as React from 'react'
+import React, { useCallback, useState, useEffect, memo } from 'react'
 import { Badge, Typography } from '@material-ui/core'
 import { selectTextWithCtrlA } from '../../utils/handleTextSelectWithCtrlA'
-import { Theme, withStyles } from '@material-ui/core/styles'
+import { Theme, withStyles, emphasize } from '@material-ui/core/styles'

 interface HistoryItem {
  key: string
@@ -15,45 +15,49 @@ interface Props {
  onClick?: (index: number, element: EventTarget) => void
  classes: any
  contentTypeIndicator?: JSX.Element
+  autoOpen?: boolean
  theme: Theme
+  children?: any
 }

-interface State {
-  collapsed: boolean
-}
+function HistoryDrawer(props: Props) {
+  const handleCtrlA = selectTextWithCtrlA({ targetSelector: 'pre' })
+  const [expanded, setExpanded] = useState<boolean | undefined>(undefined)

-class HistoryDrawer extends React.Component<Props, State> {
-  constructor(props: any) {
-    super(props)
-    this.state = {
-      collapsed: true,
+  const toggle = useCallback(() => {
+    setExpanded(!expanded)
+  }, [expanded])
+
+  useEffect(() => {
+    if (props.autoOpen && expanded === undefined && props.items.length > 0) {
+      setExpanded(true)
    }
+  }, [props.autoOpen, expanded, props.items])
+
+  const createSelectionHandler = (index: number) => (event: React.MouseEvent) => {
+    props.onClick && props.onClick(index, event.target)
+    event.preventDefault()
+    event.stopPropagation()
  }

-  private toggle = () => {
-    this.setState({ collapsed: !this.state.collapsed })
-  }
-
-  private handleCtrlA = selectTextWithCtrlA({ targetSelector: 'pre' })
-
-  public renderHistory() {
+  function renderHistory() {
    const style = (element: HistoryItem) => ({
      backgroundColor: element.selected
-        ? this.props.theme.palette.action.selected
-        : this.props.theme.palette.action.hover,
+        ? emphasize(props.theme.palette.background.default, 0.2)
+        : emphasize(props.theme.palette.background.default, 0.07),
      margin: '8px',
      padding: '8px 8px 0 8px',
-      cursor: this.props.onClick ? 'pointer' : 'inherit',
+      cursor: props.onClick ? 'pointer' : 'inherit',
    })

    const messageStyle: React.CSSProperties = { textOverflow: 'ellipsis', whiteSpace: 'nowrap', overflow: 'hidden' }
-    const elements = this.props.items.map((element, index) => (
+    const elements = props.items.map((element, index) => (
      <div
        key={element.key}
        style={style(element)}
-        onClick={(event: React.MouseEvent) => this.props.onClick && this.props.onClick(index, event.target)}
+        onClick={createSelectionHandler(index)}
        tabIndex={0}
-        onKeyDown={this.handleCtrlA}
+        onKeyDown={handleCtrlA}
      >
        <div>
          <i>{element.title}</i>
@@ -66,40 +70,47 @@ class HistoryDrawer extends React.Component<Props, State> {
      </div>
    ))

-    const visible = this.props.items.length > 0 && this.state.collapsed
+    const visible = props.items.length > 0 && !expanded

    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 className={props.classes.main}>
+        <div
+          style={{
+            backgroundColor: emphasize(props.theme.palette.background.default, 0.07),
+            borderBottom: expanded ? `1px solid ${emphasize(props.theme.palette.background.default, 0.2)}` : undefined,
+          }}
+        >
+          <Typography component={'span'} onClick={toggle} style={{ cursor: 'pointer', display: 'flex' }}>
+            <span style={{ flexGrow: 1 }}>
+              <Badge
+                classes={{ badge: props.classes.badge }}
+                invisible={!visible}
+                badgeContent={props.items.length}
+                color="primary"
+              >
+                {expanded ? '▼ History' : '▶ History'}
+              </Badge>
+            </span>
+            <span>{props.contentTypeIndicator}</span>
+          </Typography>
+        </div>
        <div style={{ maxHeight: '230px', overflowY: 'scroll' }}>
-          {this.state.collapsed ? null : this.props.children}
-          {this.state.collapsed ? null : elements}
+          {expanded ? props.children : null}
+          {expanded ? elements : null}
        </div>
      </div>
    )
  }

-  public render() {
-    return <div style={{ display: 'block', width: '100%' }}>{this.renderHistory()}</div>
-  }
+  return <div style={{ display: 'block', width: '100%' }}>{renderHistory()}</div>
 }

 const styles = (theme: Theme) => ({
  main: {
-    backgroundColor: 'rgba(170, 170, 170, 0.2)',
+    backgroundColor: theme.palette.background.default,
    marginTop: '16px',
  },
  badge: { right: '-25px' },
 })

-export default withStyles(styles, { withTheme: true })(HistoryDrawer)
+export default withStyles(styles, { withTheme: true })(memo(HistoryDrawer))
@@ -0,0 +1,20 @@
+import React, { memo } from 'react'
+import { Message } from '../../../../backend/src/Model'
+import { Tooltip } from '@material-ui/core'
+
+export const MessageId = memo(function MessageId(props: { message: Message; addComma?: boolean }) {
+  const { message, addComma } = props
+
+  if (!message.messageId) {
+    return null
+  }
+
+  return (
+    <Tooltip title="MessageIds are used to signal a successful transmission of a message.">
+      <span>
+        #msg: {message.messageId}
+        {addComma ? ', ' : ''}
+      </span>
+    </Tooltip>
+  )
+})
@@ -4,7 +4,7 @@ import { TopicViewModel } from '../../model/TopicViewModel'
 import { Typography } from '@material-ui/core'

 interface Props {
-  node: q.TreeNode<TopicViewModel>
+  node?: q.TreeNode<TopicViewModel>
 }

 class NodeStats extends React.Component<Props, {}> {
@@ -14,6 +14,9 @@ class NodeStats extends React.Component<Props, {}> {

  public render() {
    const { node } = this.props
+    if (!node) {
+      return null
+    }

    return (
      <div>
@@ -0,0 +1,34 @@
+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>
+  )
+}
+
+// @ts-ignore
+export default withStyles(styles)(Panel)
@@ -1,111 +0,0 @@
-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?]
-  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)
-    let yDomain: [number, number] = props.range
-      ? [props.range[0] || calculatedDomain[0], props.range[1] || calculatedDomain[1]]
-      : calculatedDomain
-
-    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}>
-          <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] {
-  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]
-}
@@ -1,11 +1,14 @@
 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 'ace-builds'
+import 'ace-builds/webpack-resolver'
+import 'ace-builds/src-noconflict/mode-json'
+import 'ace-builds/src-noconflict/mode-xml'
+import 'ace-builds/src-noconflict/snippets/json'
+import 'ace-builds/src-noconflict/snippets/xml'
+import 'ace-builds/src-noconflict/mode-text'
+import 'ace-builds/src-noconflict/theme-monokai'
 import 'react-ace'

 function Editor(props: {
@@ -13,6 +16,7 @@ function Editor(props: {
  theme: Theme
  value: string | undefined
  onChange: (value: string) => void
+  editorRef: React.Ref<AceEditor>
 }) {
  const editorOptions = {
    showLineNumbers: false,
@@ -21,12 +25,17 @@ function Editor(props: {

  return (
    <AceEditor
+      ref={props.editorRef}
      style={{}}
      mode={props.editorMode}
      theme={props.theme.palette.type === 'dark' ? 'monokai' : 'dawn'}
      name="UNIQUE_ID_OF_DIV"
      width="100%"
      height="200px"
+      enableSnippets={true}
+      enableBasicAutocompletion={true}
+      enableLiveAutocompletion={true}
+      showPrintMargin={false}
      showGutter={true}
      value={props.value}
      onChange={props.onChange}
@@ -4,6 +4,7 @@ import { FormControlLabel, Radio, RadioGroup } from '@material-ui/core'
 interface Props {
  value: string
  onChange: (event: React.ChangeEvent<{}>, value: string) => void
+  focusEditor: () => void
 }
 export function EditorModeSelect(props: Props) {
  const labelStyle = { margin: '0 8px 0 8px' }
@@ -11,6 +12,7 @@ export function EditorModeSelect(props: Props) {
    <RadioGroup
      style={{ display: 'inline-block', float: 'left' }}
      value={props.value}
+      onFocus={props.focusEditor}
      onChange={props.onChange}
      row={true}
    >
@@ -1,32 +1,19 @@
-import * as q from '../../../../../backend/src/Model'
-import * as React from 'react'
-import ClearAdornment from '../../helper/ClearAdornment'
+import Editor from './Editor'
 import FormatAlignLeft from '@material-ui/icons/FormatAlignLeft'
-import History from '../HistoryDrawer'
 import Message from './Model/Message'
 import Navigation from '@material-ui/icons/Navigation'
+import PublishHistory from './PublishHistory'
+import React, { useCallback, useMemo, useState, useRef, memo } from 'react'
+import RetainSwitch from './RetainSwitch'
+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 { globalActions, publishActions } from '../../../actions'
-
-import {
-  Button,
-  FormControlLabel,
-  FormControl,
-  InputLabel,
-  Input,
-  Checkbox,
-  Tooltip,
-  Fab,
-  Theme,
-  withTheme,
-} from '@material-ui/core'
 import { EditorModeSelect } from './EditorModeSelect'
-import QosSelect from './QosSelect'
-import Editor from './Editor'
-
-const sha1 = require('sha1')
+import { globalActions, publishActions } from '../../../actions'
+import { KeyCodes } from '../../../utils/KeyCodes'
+import { default as AceEditor } from 'react-ace'

 interface Props {
  connectionId?: string
@@ -39,187 +26,165 @@ interface Props {
  theme: Theme
 }

-interface State {
-  history: Array<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 = { history: [] }
-  }
+function Publish(props: Props) {
+  const editorRef = useRef<AceEditor>()
+  const [history, amendToHistory] = useHistory()

-  private updatePayload = (payload: string) => {
-    this.props.actions.setPayload(payload)
-  }
+  const focusEditor = useCallback(() => {
+    editorRef.current?.editor.focus()
+  }, [editorRef])

-  private updateTopic = (e: React.ChangeEvent<HTMLInputElement>) => {
-    this.props.actions.setTopic(e.target.value)
-  }
-
-  private updateMode = (e: React.ChangeEvent<{}>, value: string) => {
-    this.props.actions.setEditorMode(value)
-  }
-
-  private publish = (e: React.MouseEvent) => {
-    e.stopPropagation()
-    if (!this.props.connectionId) {
+  const publish = useCallback(() => {
+    if (!props.connectionId) {
      return
    }

-    this.props.actions.publish(this.props.connectionId)
+    props.actions.publish(props.connectionId)

-    const topic = this.props.topic || ''
-    const payload = this.props.payload
-    if (this.props.connectionId && topic) {
-      this.addMessageToHistory(topic, payload)
+    const topic = props.topic || ''
+    const payload = props.payload
+    if (props.connectionId && topic) {
+      amendToHistory(topic, payload)
    }
-  }
+  }, [props, props.connectionId, props.topic, props.payload, amendToHistory])

-  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: Array<Message> = [...filteredHistory, { topic, payload, sent: new Date() }]
-    this.setState({ history })
-  }
+  const handleSubmit = useCallback(
+    (e: React.KeyboardEvent) => {
+      if (e.keyCode === KeyCodes.enter && (e.metaKey || e.ctrlKey)) {
+        e.preventDefault()
+        e.stopPropagation()
+        publish()
+      }
+    },
+    [publish]
+  )

-  private clearTopic = () => {
-    this.props.actions.setTopic('')
-  }
-
-  private topic() {
-    const topicStr = this.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={this.clearTopic} value={topicStr} />}
-            onBlur={this.onTopicBlur}
-            onChange={this.updateTopic}
-            multiline={true}
-            placeholder="example/topic"
+  return useMemo(
+    () => (
+      <div style={{ flexGrow: 1, width: '100%' }} onKeyDown={handleSubmit}>
+        <TopicInput />
+        <div style={{ width: '100%', display: 'block' }}>
+          <EditorMode
+            focusEditor={focusEditor}
+            actions={props.actions}
+            globalActions={props.globalActions}
+            payload={props.payload}
+            editorMode={props.editorMode}
+            publish={publish}
          />
-        </FormControl>
+          <Editor
+            value={props.payload}
+            editorMode={props.editorMode}
+            onChange={props.actions.setPayload}
+            editorRef={editorRef as any}
+          />
+          <RetainSwitch />
+        </div>
+        <PublishHistory history={history} />
      </div>
-    )
-  }
+    ),
+    [props.payload, props.editorMode, history, handleSubmit, publish]
+  )
+}

-  private onTopicBlur = (e: React.FocusEvent<HTMLInputElement>) => {
-    if (!e.target.value) {
-      this.props.actions.setTopic(undefined)
-    }
-  }
+const EditorMode = memo(function EditorMode(props: {
+  payload?: string
+  editorMode: string
+  focusEditor: () => void
+  actions: typeof publishActions
+  globalActions: typeof globalActions
+  publish: () => void
+}) {
+  const updatePayload = props.actions.setPayload

-  private publishButton() {
-    return (
-      <Button variant="contained" size="small" color="primary" onClick={this.publish} id="publish-button">
-        <Navigation style={{ marginRight: '8px' }} /> Publish
-      </Button>
-    )
-  }
+  const updateMode = useCallback((e: React.ChangeEvent<{}>, value: string) => {
+    props.actions.setEditorMode(value)
+  }, [])

-  private formatJson = () => {
-    if (this.props.payload) {
+  const formatJson = useCallback(() => {
+    if (props.payload) {
      try {
-        const str = JSON.stringify(JSON.parse(this.props.payload), undefined, '  ')
-        this.updatePayload(str)
+        const str = JSON.stringify(JSON.parse(props.payload), undefined, '  ')
+        updatePayload(str)
      } catch (error) {
-        this.props.globalActions.showError(`Format error: ${error.message}`)
+        props.globalActions.showError(`Format error: ${(error as Error)?.message}`)
      }
    }
-  }
+  }, [props.payload])

-  private renderFormatJson() {
-    if (this.props.editorMode !== 'json') {
-      return null
-    }
-
-    return (
-      <Tooltip title="Format JSON">
-        <Fab
-          style={{ width: '36px', height: '36px', marginLeft: '8px' }}
-          onClick={this.formatJson}
-          id="sidebar-publish-format-json"
-        >
-          <FormatAlignLeft style={{ fontSize: '20px' }} />
-        </Fab>
-      </Tooltip>
-    )
-  }
-
-  private editorMode() {
-    return (
-      <div style={{ marginTop: '16px' }}>
-        <div style={{ width: '100%', lineHeight: '64px' }}>
-          <EditorModeSelect value={this.props.editorMode} onChange={this.updateMode} />
-          {this.renderFormatJson()}
-          <div style={{ float: 'right', marginRight: '16px' }}>{this.publishButton()}</div>
+  return (
+    <div style={{ marginTop: '16px' }}>
+      <div style={{ width: '100%', lineHeight: '64px', textAlign: 'center' }}>
+        <EditorModeSelect value={props.editorMode} onChange={updateMode} focusEditor={props.focusEditor} />
+        <FormatJsonButton editorMode={props.editorMode} focusEditor={props.focusEditor} formatJson={formatJson} />
+        <div style={{ float: 'right' }}>
+          <PublishButton publish={props.publish} focusEditor={props.focusEditor} />
        </div>
      </div>
-    )
+    </div>
+  )
+})
+
+const FormatJsonButton = React.memo(function FormatJsonButton(props: {
+  editorMode: string
+  focusEditor: () => void
+  formatJson: () => void
+}) {
+  if (props.editorMode !== 'json') {
+    return null
  }

-  private publishMode() {
-    const labelStyle = { margin: '0 8px 0 8px' }
+  return (
+    <Tooltip title="Format JSON">
+      <Fab
+        style={{ width: '36px', height: '36px', margin: '0 8px' }}
+        onClick={props.formatJson}
+        onFocus={props.focusEditor}
+        id="sidebar-publish-format-json"
+      >
+        <FormatAlignLeft style={{ fontSize: '20px' }} />
+      </Fab>
+    </Tooltip>
+  )
+})

-    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={this.props.retain} onChange={this.props.actions.toggleRetain} />
-              }
-              label="retain"
-              labelPlacement="end"
-            />
-          </Tooltip>
-        </div>
-      </div>
-    )
-  }
+const PublishButton = memo(function PublishButton(props: { publish: () => void; focusEditor: () => void }) {
+  const handleClickPublish = useCallback(
+    (e: React.MouseEvent) => {
+      e.stopPropagation()
+      props.publish()
+    },
+    [props.publish]
+  )

-  private history() {
-    const items = [...this.state.history].reverse().map(message => ({
-      key: sha1(message.topic + message.payload),
-      title: message.topic,
-      value: message.payload || '',
-    }))
-    return <History items={items} onClick={this.didSelectHistoryEntry} />
-  }
-
-  private didSelectHistoryEntry = (index: number) => {
-    const message = this.state.history[index]
-    this.props.actions.setTopic(message.topic)
-    this.props.actions.setPayload(message.payload)
-  }
-
-  public render() {
-    return (
-      <div style={{ flexGrow: 1, marginLeft: '8px' }}>
-        {this.topic()}
-        <div style={{ width: '100%', display: 'block' }}>
-          {this.editorMode()}
-          <Editor value={this.props.payload} editorMode={this.props.editorMode} onChange={this.updatePayload} />
-          {this.publishMode()}
-        </div>
-        {this.history()}
-      </div>
-    )
-  }
-}
+  return (
+    <Button
+      variant="contained"
+      size="small"
+      color="primary"
+      onClick={handleClickPublish}
+      onFocus={props.focusEditor}
+      id="publish-button"
+    >
+      <Navigation style={{ marginRight: '8px' }} /> Publish
+    </Button>
+  )
+})

 const mapDispatchToProps = (dispatch: any) => {
  return {
@@ -230,14 +195,11 @@ const mapDispatchToProps = (dispatch: any) => {

 const mapStateToProps = (state: AppState) => {
  return {
-    topic: state.publish.topic,
+    topic: state.publish.manualTopic,
    payload: state.publish.payload,
    editorMode: state.publish.editorMode,
    retain: state.publish.retain,
  }
 }

-export default connect(
-  mapStateToProps,
-  mapDispatchToProps
-)(withTheme(Publish))
+export default connect(mapStateToProps, mapDispatchToProps)(withTheme(Publish))
@@ -0,0 +1,37 @@
+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 autoOpen={true} items={items} onClick={didSelectHistoryEntry} />
+  }, [props.history])
+}
+
+const mapDispatchToProps = (dispatch: any) => {
+  return {
+    actions: bindActionCreators(publishActions, dispatch),
+  }
+}
+
+export default connect(undefined, mapDispatchToProps)(PublishHistory)
@@ -0,0 +1,34 @@
+import * as React from 'react'
+import { connect } from 'react-redux'
+import { AppState } from '../../../reducers'
+import { bindActionCreators } from 'redux'
+import { publishActions } from '../../../actions'
+import { QosSelect } from '../../QosSelect'
+import { QoS } from '../../../../../backend/src/DataSource/MqttSource'
+
+interface Props {
+  qos: QoS
+  actions: {
+    publish: typeof publishActions
+  }
+}
+
+function QosPublishOption(props: Props) {
+  return <QosSelect onChange={props.actions.publish.setQoS} selected={props.qos} />
+}
+
+const mapDispatchToProps = (dispatch: any) => {
+  return {
+    actions: {
+      publish: bindActionCreators(publishActions, dispatch),
+    },
+  }
+}
+
+const mapStateToProps = (state: AppState) => {
+  return {
+    qos: state.publish.qos,
+  }
+}
+
+export default connect(mapStateToProps, mapDispatchToProps)(QosPublishOption)
@@ -0,0 +1,44 @@
+import QosSelect from './QosPublishOption'
+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)
@@ -0,0 +1,65 @@
+import ClearAdornment from '../../helper/ClearAdornment'
+import React, { useCallback, useMemo, useRef } 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; manualTopic?: string; selectedTopic?: string }) {
+  const inputElement = useRef<HTMLInputElement>(null)
+
+  const updateTopic = useCallback((e: React.ChangeEvent<HTMLInputElement>) => {
+    props.actions.setTopic(e.target.value)
+  }, [])
+
+  const clearTopic = useCallback(() => {
+    props.actions.setTopic('')
+    inputElement.current?.focus()
+  }, [])
+
+  const onTopicBlur = useCallback((e: React.FocusEvent<HTMLInputElement>) => {
+    if (!e.target.value) {
+      props.actions.setTopic(undefined)
+    }
+  }, [])
+
+  const topicStr = props.manualTopic || ''
+
+  return useMemo(
+    () => (
+      <div>
+        <FormControl style={{ width: '100%' }}>
+          <InputLabel htmlFor="publish-topic">Topic</InputLabel>
+          <Input
+            inputRef={inputElement}
+            id="publish-topic"
+            value={topicStr}
+            startAdornment={<span />}
+            endAdornment={<ClearAdornment action={clearTopic} value={topicStr} />}
+            onBlur={onTopicBlur}
+            onChange={updateTopic}
+            multiline={false}
+            placeholder={props.selectedTopic ?? 'example/topic'}
+          />
+        </FormControl>
+      </div>
+    ),
+    [topicStr]
+  )
+}
+
+const mapDispatchToProps = (dispatch: any) => {
+  return {
+    actions: bindActionCreators(publishActions, dispatch),
+  }
+}
+
+const mapStateToProps = (state: AppState) => {
+  return {
+    manualTopic: state.publish.manualTopic,
+    selectedTopic: state.tree.get('selectedTopic')?.path(),
+  }
+}
+
+export default connect(mapStateToProps, mapDispatchToProps)(TopicInput)
@@ -1,11 +1,7 @@
 import * as q from '../../../../backend/src/Model'
-import * as React from 'react'
-import Copy from '../helper/Copy'
-import CustomIconButton from '../helper/CustomIconButton'
-import Delete from '@material-ui/icons/Delete'
+import React, { useState, useEffect, useCallback } from 'react'
 import ExpandMore from '@material-ui/icons/ExpandMore'
 import NodeStats from './NodeStats'
-import Topic from './Topic'
 import ValuePanel from './ValueRenderer/ValuePanel'
 import { AppState } from '../../reducers'
 import { Badge, ExpansionPanel, ExpansionPanelDetails, ExpansionPanelSummary, Typography } from '@material-ui/core'
@@ -14,166 +10,75 @@ 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'
+import { usePollingToFetchTreeNode } from '../helper/usePollingToFetchTreeNode'

 const throttle = require('lodash.throttle')

 const Publish = React.lazy(() => import('./Publish/Publish'))

 interface Props {
-  node?: q.TreeNode<TopicViewModel>
+  nodePath?: string
+  tree?: q.Tree<TopicViewModel>
  actions: typeof sidebarActions
  settingsActions: typeof settingsActions
  classes: any
  connectionId?: string
 }

-interface State {
-  compareMessage?: q.Message
-  valueRenderWidth: number
+function useUpdateNodeWhenNodeReceivesUpdates(node?: q.TreeNode<any>) {
+  const [lastUpdate, setLastUpdate] = useState(0)
+  const updateNode = useCallback(
+    throttle(() => {
+      setLastUpdate(node ? node.lastUpdate : 0)
+    }, 300),
+    [node]
+  )
+
+  useEffect(() => {
+    const updateCallback = updateNode
+    node && node.onMerge.subscribe(updateCallback)
+    node && node.onMessage.subscribe(updateCallback)
+
+    return function cleanup() {
+      node && node.onMerge.unsubscribe(updateCallback)
+      node && node.onMessage.unsubscribe(updateCallback)
+    }
+  }, [node])
 }

-class Sidebar extends React.Component<Props, State> {
-  private updateNode = throttle(() => {
-    this.setState(this.state)
-  }, 300)
+function Sidebar(props: Props) {
+  const { classes, tree, nodePath } = props
+  const node = usePollingToFetchTreeNode(tree, nodePath || '')
+  useUpdateNodeWhenNodeReceivesUpdates(node)
+  // console.log(node && node.path(), tree, nodePath)

-  private detailsStyle = { padding: '0px 16px 8px 8px', display: 'block' }
-
-  constructor(props: any) {
-    super(props)
-    this.state = { valueRenderWidth: 300 }
-  }
-
-  private registerUpdateListener(node: q.TreeNode<TopicViewModel>) {
-    node.onMerge.subscribe(this.updateNode)
-    node.onMessage.subscribe(this.updateNode)
-  }
-
-  private removeUpdateListener(node: q.TreeNode<TopicViewModel>) {
-    node.onMerge.unsubscribe(this.updateNode)
-    node.onMessage.unsubscribe(this.updateNode)
-  }
-
-  private renderTopicDeleteButton() {
-    if (!this.props.node || (!this.props.node.message || !this.props.node.message.value)) {
-      return null
-    }
-
-    return (
-      <CustomIconButton onClick={() => this.deleteTopic(this.props.node)} tooltip="Clear this topic">
-        <Delete style={{ marginTop: '-3px' }} />
-      </CustomIconButton>
-    )
-  }
-
-  private renderRecursiveTopicDeleteButton() {
-    const deleteLimit = 50
-    const topicCount = this.props.node ? this.props.node.childTopicCount() : 0
-    if (!this.props.node || topicCount === 0 || (this.props.node.message && topicCount === 1)) {
-      return null
-    }
-
-    return (
-      <Badge
-        classes={{ badge: this.props.classes.badge }}
-        badgeContent={<span style={{ whiteSpace: 'nowrap' }}>{topicCount >= deleteLimit ? '50+' : topicCount}</span>}
-        color="secondary"
-      >
-        <CustomIconButton
-          onClick={() => this.deleteTopic(this.props.node, true, deleteLimit)}
-          tooltip={`Deletes up to ${deleteLimit} sub-topics with a single click`}
-        >
-          <Delete style={{ marginTop: '-3px' }} color="action" />
-        </CustomIconButton>
-      </Badge>
-    )
-  }
-
-  private deleteTopic = (topic?: q.TreeNode<TopicViewModel>, recursive: boolean = false, maxCount = 50) => {
-    if (!topic) {
-      return
-    }
-
-    this.props.actions.clearTopic(topic, recursive, maxCount)
-  }
-
-  private renderNode() {
-    const { classes, node } = this.props
-
-    const copyTopic = node ? <Copy value={node.path()} /> : null
-    const deleteTopic = this.renderTopicDeleteButton()
-    const deleteRecursiveTopic = this.renderRecursiveTopicDeleteButton()
-    const summaryStyle = { minHeight: '0' }
-    return (
+  return (
+    <div id="Sidebar" className={classes.drawer}>
      <div>
-        <ExpansionPanel key="topic" defaultExpanded={true} disabled={!Boolean(this.props.node)}>
-          <ExpansionPanelSummary expandIcon={<ExpandMore />} style={summaryStyle}>
-            <Typography className={classes.heading}>
-              Topic {copyTopic} {deleteTopic} {deleteRecursiveTopic}
-            </Typography>
-          </ExpansionPanelSummary>
-          <ExpansionPanelDetails style={this.detailsStyle}>
-            <Topic node={this.props.node} didSelectNode={this.updateNode} />
+        <TopicPanel node={node} />
+        <ValuePanel lastUpdate={node ? node.lastUpdate : 0} />
+        <Panel>
+          <span>Publish</span>
+          <Publish connectionId={props.connectionId} />
+        </Panel>
+        <Panel detailsHidden={!node}>
+          <span>Stats</span>
+          <ExpansionPanelDetails className={classes.details}>
+            <NodeStats node={node} />
          </ExpansionPanelDetails>
-        </ExpansionPanel>
-        <ValuePanel lastUpdate={this.props.node ? this.props.node.lastUpdate : 0} />
-        <ExpansionPanel defaultExpanded={true}>
-          <ExpansionPanelSummary expandIcon={<ExpandMore />} style={summaryStyle}>
-            <Typography className={classes.heading}>Publish</Typography>
-          </ExpansionPanelSummary>
-          <ExpansionPanelDetails style={this.detailsStyle}>
-            <React.Suspense fallback={<div>Loading...</div>}>
-              <Publish connectionId={this.props.connectionId} />
-            </React.Suspense>
-          </ExpansionPanelDetails>
-        </ExpansionPanel>
-        <ExpansionPanel defaultExpanded={Boolean(this.props.node)}>
-          <ExpansionPanelSummary expandIcon={<ExpandMore />} style={summaryStyle}>
-            <Typography className={classes.heading}>Stats</Typography>
-          </ExpansionPanelSummary>
-          {this.renderNodeStats()}
-        </ExpansionPanel>
+        </Panel>
      </div>
-    )
-  }
-
-  private renderNodeStats() {
-    if (!this.props.node) {
-      return null
-    }
-
-    return (
-      <ExpansionPanelDetails style={this.detailsStyle}>
-        <NodeStats node={this.props.node} />
-      </ExpansionPanelDetails>
-    )
-  }
-
-  public componentWillReceiveProps(nextProps: Props) {
-    this.props.node && this.removeUpdateListener(this.props.node)
-    nextProps.node && this.registerUpdateListener(nextProps.node)
-
-    if (this.props.node !== nextProps.node) {
-      this.setState({ compareMessage: undefined })
-    }
-  }
-
-  public componentWillUnmount() {
-    this.props.node && this.removeUpdateListener(this.props.node)
-  }
-
-  public render() {
-    return (
-      <div id="Sidebar" className={this.props.classes.drawer}>
-        {this.renderNode()}
-      </div>
-    )
-  }
+    </div>
+  )
 }

 const mapStateToProps = (state: AppState) => {
+  const node = state.tree.get('selectedTopic')
  return {
-    node: state.tree.get('selectedTopic'),
+    tree: state.connection.tree,
+    nodePath: node && node.path(),
  }
 }

@@ -188,22 +93,10 @@ const styles = (theme: Theme) => ({
  drawer: {
    display: 'block' as 'block',
  },
-  badge: {
-    top: '3px',
-    right: '3px',
-  },
-  valuePaper: {
-    margin: theme.spacing(1),
-  },
-  heading: {
-    fontSize: theme.typography.pxToRem(15),
-    fontWeight: theme.typography.fontWeightRegular,
+  details: {
+    padding: '0px 16px 8px 8px',
+    display: 'block',
  },
 })

-export default withStyles(styles)(
-  connect(
-    mapStateToProps,
-    mapDispatchToProps
-  )(Sidebar)
-)
+export default withStyles(styles)(connect(mapStateToProps, mapDispatchToProps)(Sidebar))
@@ -0,0 +1,37 @@
+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(
+    (event: React.MouseEvent) => {
+      if (props.node) {
+        event.stopPropagation()
+        event.preventDefault()
+        props.deleteTopicAction(props.node, true, Infinity)
+      }
+    },
+    [props.node]
+  )
+
+  if (!props.node) {
+    return null
+  }
+
+  const topicCount = props.node ? props.node.childTopicCount() : 0
+  if (topicCount === 0 || (props.node.message && topicCount === 1)) {
+    return null
+  }
+  return (
+    <Badge badgeContent={<span style={{ whiteSpace: 'nowrap' }}>{topicCount}</span>} color="secondary">
+      <CustomIconButton onClick={onClick} tooltip={`Deletes ${topicCount} sub-topics with a single click`}>
+        <Delete color="action" />
+      </CustomIconButton>
+    </Badge>
+  )
+}
@@ -1,11 +1,11 @@
-import * as React from 'react'
-import * as q from '../../../../backend/src/Model'
+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 { treeActions } from '../../../actions'
 import { bindActionCreators } from 'redux'
 import { connect } from 'react-redux'
-import { TopicViewModel } from '../../model/TopicViewModel'
+import { TopicViewModel } from '../../../model/TopicViewModel'

 interface Props {
  classes: any
@@ -13,7 +13,6 @@ interface Props {
  node?: q.TreeNode<TopicViewModel>
  selected?: q.TreeNode<TopicViewModel>
  actions: typeof treeActions
-  didSelectNode: (node: q.TreeNode<TopicViewModel>) => void
 }

 const styles = (theme: Theme) => ({
@@ -24,7 +23,7 @@ const styles = (theme: Theme) => ({
  },
 })

-class Topic extends React.Component<Props, {}> {
+class Topic extends React.PureComponent<Props, {}> {
  public render() {
    const { node, theme } = this.props
    if (!node) {
@@ -67,7 +66,4 @@ const mapDispatchToProps = (dispatch: any) => {
  }
 }

-export default connect(
-  null,
-  mapDispatchToProps
-)(withStyles(styles, { withTheme: true })(Topic))
+export default connect(null, mapDispatchToProps)(withStyles(styles, { withTheme: true })(Topic))
@@ -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.payload) {
+    return null
+  }
+  return (
+    <CustomIconButton onClick={() => props.deleteTopicAction(node)} tooltip="Clear this topic">
+      <Delete />
+    </CustomIconButton>
+  )
+}
@@ -0,0 +1,46 @@
+import * as q from '../../../../../backend/src/Model'
+import Copy from '../../helper/Copy'
+import Panel from '../Panel'
+import React, { useMemo, useCallback } 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 }) => {
+  const { node } = props
+  console.log(node && node.path())
+  const copyTopic = node ? <Copy value={node.path()} /> : null
+
+  const deleteTopic = useCallback((topic?: q.TreeNode<any>, recursive: boolean = false) => {
+    if (!topic) {
+      return
+    }
+
+    props.actions.clearTopic(topic, recursive)
+  }, [])
+
+  return useMemo(
+    () => (
+      <Panel disabled={!Boolean(node)}>
+        <span>
+          Topic {copyTopic}
+          <TopicDeleteButton node={node} deleteTopicAction={deleteTopic} />
+          <RecursiveTopicDeleteButton node={node} deleteTopicAction={deleteTopic} />
+        </span>
+        <Topic node={node} />
+      </Panel>
+    ),
+    [node, node && node.childTopicCount()]
+  )
+}
+
+const mapDispatchToProps = (dispatch: any) => {
+  return {
+    actions: bindActionCreators(sidebarActions, dispatch),
+  }
+}
+
+export default connect(undefined, mapDispatchToProps)(TopicPanel)
@@ -0,0 +1,76 @@
+import React, { useCallback } from 'react'
+import Code from '@material-ui/icons/Code'
+import Reorder from '@material-ui/icons/Reorder'
+import ToggleButton from '@material-ui/lab/ToggleButton'
+import ToggleButtonGroup from '@material-ui/lab/ToggleButtonGroup'
+import { settingsActions } from '../../../actions'
+import { Tooltip, withStyles, Theme } from '@material-ui/core'
+import { bindActionCreators } from 'redux'
+import { AppState } from '../../../reducers'
+import { connect } from 'react-redux'
+import { ValueRendererDisplayMode } from '../../../reducers/Settings'
+
+function ActionButtons(props: {
+  actions: { settings: typeof settingsActions }
+  valueRendererDisplayMode: ValueRendererDisplayMode
+  classes: any
+}) {
+  const handleValue = useCallback(
+    (mouseEvent: React.MouseEvent, value: any) => {
+      if (value === null) {
+        return
+      }
+      props.actions.settings.setValueDisplayMode(value)
+    },
+    [props.actions.settings.setValueDisplayMode]
+  )
+
+  return (
+    <ToggleButtonGroup
+      id="valueRendererDisplayMode"
+      value={props.valueRendererDisplayMode}
+      exclusive={true}
+      onChange={handleValue}
+    >
+      <ToggleButton className={props.classes.toggleButton} value="diff" id="valueRendererDisplayMode-diff">
+        <Tooltip title="Show difference between the current and the last message">
+          <span>
+            <Code className={props.classes.toggleButtonIcon} />
+          </span>
+        </Tooltip>
+      </ToggleButton>
+      <ToggleButton className={props.classes.toggleButton} value="raw" id="valueRendererDisplayMode-raw">
+        <Tooltip title="Raw / formatted JSON / formatted sparkplugb protojson">
+          <span>
+            <Reorder className={props.classes.toggleButtonIcon} />
+          </span>
+        </Tooltip>
+      </ToggleButton>
+    </ToggleButtonGroup>
+  )
+}
+
+const styles = (theme: Theme) => ({
+  toggleButton: {
+    height: '36px',
+  },
+  toggleButtonIcon: {
+    verticalAlign: 'middle',
+  },
+})
+
+const mapDispatchToProps = (dispatch: any) => {
+  return {
+    actions: {
+      settings: bindActionCreators(settingsActions, dispatch),
+    },
+  }
+}
+
+const mapStateToProps = (state: AppState) => {
+  return {
+    valueRendererDisplayMode: state.settings.get('valueRendererDisplayMode'),
+  }
+}
+
+export default connect(mapStateToProps, mapDispatchToProps)(withStyles(styles)(ActionButtons))
@@ -0,0 +1,36 @@
+import Clear from '@material-ui/icons/Clear'
+import React, { useMemo } from 'react'
+import { bindActionCreators } from 'redux'
+import { Button, Tooltip } from '@material-ui/core'
+import { connect } from 'react-redux'
+import { sidebarActions } from '../../../actions'
+
+const DeleteSelectedTopicButton = (props: {
+  actions: {
+    sidebar: typeof sidebarActions
+  }
+}) =>
+  useMemo(
+    () => (
+      <Tooltip title="Delete retained topic" placement="top">
+        <Button
+          size="small"
+          color="secondary"
+          variant="contained"
+          style={{ marginTop: '11px', padding: '0px 4px', minHeight: '24px' }}
+          onClick={props.actions.sidebar.clearRetainedTopic}
+        >
+          retained <Clear style={{ fontSize: '16px', marginLeft: '2px' }} />
+        </Button>
+      </Tooltip>
+    ),
+    [props.actions.sidebar.clearRetainedTopic]
+  )
+
+const mapDispatchToProps = (dispatch: any) => {
+  return {
+    actions: { sidebar: bindActionCreators(sidebarActions, dispatch) },
+  }
+}
+
+export default connect(undefined, mapDispatchToProps)(DeleteSelectedTopicButton)
@@ -12,6 +12,7 @@ import { bindActionCreators } from 'redux'
 import { chartActions } from '../../../actions'
 import { connect } from 'react-redux'
 import CustomIconButton from '../../helper/CustomIconButton'
+import { MessageId } from '../MessageId'

 const throttle = require('lodash.throttle')

@@ -27,16 +28,17 @@ interface Props {
 interface State {
  displayMessage?: q.Message
  anchorEl?: HTMLElement
+  lastUpdate: number
 }

-class MessageHistory extends React.Component<Props, State> {
+class MessageHistory extends React.PureComponent<Props, State> {
  private updateNode = throttle(() => {
-    this.setState(this.state)
+    this.setState({ lastUpdate: Date.now() })
  }, 300)

  constructor(props: any) {
    super(props)
-    this.state = {}
+    this.state = { lastUpdate: 0 }
  }

  private addNodeToCharts = (event: React.MouseEvent) => {
@@ -80,19 +82,25 @@ class MessageHistory extends React.Component<Props, State> {
    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 value = message.payload ? Base64Message.toUnicodeString(message.payload) : ''
      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: 'left' }}>
+              <DateFormatter date={message.received} />
+              {previousMessage && previousMessage !== message ? (
+                <i>
+                  (-
+                  <DateFormatter date={message.received} intervalSince={previousMessage.received} />)
+                </i>
+              ) : null}
+            </div>
+            <span>
+              &nbsp;
+              <MessageId message={message} />
+            </span>
            <div style={{ float: 'right' }}>
              <Copy value={value} />
            </div>
@@ -105,7 +113,7 @@ class MessageHistory extends React.Component<Props, State> {
    })

    const isMessagePlottable =
-      node.message && node.message.value && isPlottable(Base64Message.toUnicodeString(node.message.value))
+      node.message && node.message.payload && isPlottable(Base64Message.toUnicodeString(node.message.payload))
    return (
      <div>
        <History
@@ -119,9 +127,7 @@ class MessageHistory extends React.Component<Props, State> {
              >
                <ShowChart style={{ marginTop: '-5px' }} />
              </CustomIconButton>
-            ) : (
-              undefined
-            )
+            ) : undefined
          }
          onClick={this.displayMessage}
        >
@@ -138,7 +144,4 @@ const mapDispatchToProps = (dispatch: any) => {
  }
 }

-export default connect(
-  null,
-  mapDispatchToProps
-)(MessageHistory)
+export default connect(null, mapDispatchToProps)(MessageHistory)
@@ -1,196 +1,121 @@
 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 ActionButtons from './ActionButtons'
 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 Panel from '../Panel'
+import React, { useCallback } from 'react'
 import ValueRenderer from './ValueRenderer'
 import { AppState } from '../../../reducers'
 import { Base64Message } from '../../../../../backend/src/Model/Base64Message'
 import { bindActionCreators } from 'redux'
+import { Theme, Typography, withStyles } from '@material-ui/core'
 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'
+import { sidebarActions } from '../../../actions'
+import DeleteSelectedTopicButton from './DeleteSelectedTopicButton'
+import { MessageId } from '../MessageId'

 interface Props {
  node?: q.TreeNode<any>
-  valueRendererDisplayMode: ValueRendererDisplayMode
  sidebarActions: typeof sidebarActions
-  settingsActions: typeof settingsActions
  classes: any
  lastUpdate: number
  compareMessage?: q.Message
 }

-interface State {}
+function RenderedValue(props: { node?: q.TreeNode<any>; compareMessage?: q.Message }) {
+  const { node, compareMessage } = props

-class ValuePanel extends React.Component<Props, State> {
-  constructor(props: Props) {
-    super(props)
-    this.state = {}
+  if (!node || !node.message) {
+    return null
  }

-  private renderValue() {
-    const node = this.props.node
-    if (!node || !node.message) {
+  return <ValueRenderer treeNode={node} message={node.message} compareWith={compareMessage} />
+}
+
+function ValuePanel(props: Props) {
+  const { node, compareMessage } = props
+
+  function renderViewOptions() {
+    if (!props.node || !props.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 style={{ width: '100%', display: 'flex', flexWrap: 'wrap' }}>
+        <span style={{ marginTop: '2px', flexGrow: 1 }}>
+          <ActionButtons />
+        </span>
+        <span style={{ flex: 6, textAlign: 'right' }}>
+          {props.node.message.retain ? <DeleteSelectedTopicButton /> : null}
+        </span>
+        {messageMetaInfo()}
      </div>
    )
  }

-  private messageMetaInfo() {
-    if (!this.props.node || !this.props.node.message || !this.props.node.mqttMessage) {
+  function messageMetaInfo() {
+    if (!props.node || !props.node.message) {
      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' }}>
+          <MessageId message={props.node.message} addComma={true} />
+          {`QoS: ${props.node.message.qos}`}
+        </Typography>
        <Typography style={{ textAlign: 'right' }}>
          <i>
-            <DateFormatter date={this.props.node.message.received} />
+            <DateFormatter date={props.node.message.received} />
          </i>
        </Typography>
      </span>
    )
  }

-  private renderActionButtons() {
-    const handleValue = (mouseEvent: React.MouseEvent, value: any) => {
-      if (value === null) {
-        return
+  const handleMessageHistorySelect = useCallback(
+    (message: q.Message) => {
+      if (message !== compareMessage) {
+        props.sidebarActions.setCompareMessage(message)
+      } else {
+        props.sidebarActions.setCompareMessage(undefined)
      }
-      this.props.settingsActions.setValueDisplayMode(value)
-    }
+    },
+    [compareMessage]
+  )

-    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>
-    )
-  }
+  const copyValue =
+    node && node.message && node.message.payload ? (
+      <Copy value={Base64Message.toUnicodeString(node.message.payload)} />
+    ) : null

-  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>
-    )
-  }
+  return (
+    <Panel>
+      <span>Value {copyValue}</span>
+      <span style={{ width: '100%' }}>
+        {renderViewOptions()}
+        <div style={{ marginBottom: '-8px', marginTop: '8px' }}>
+          <React.Suspense fallback={<div>Loading...</div>}>
+            <RenderedValue node={node} compareMessage={compareMessage} />
+          </React.Suspense>
+        </div>
+        <div>
+          <MessageHistory onSelect={handleMessageHistorySelect} selected={props.compareMessage} node={props.node} />
+        </div>
+      </span>
+    </Panel>
+  )
 }

 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'),
  }
@@ -201,15 +126,7 @@ const styles = (theme: Theme) => ({
    fontSize: theme.typography.pxToRem(15),
    fontWeight: theme.typography.fontWeightRegular,
  },
-  toggleButton: {
-    height: '36px',
-  },
-  toggleButtonIcon: {
-    verticalAlign: 'middle',
-  },
 })

-export default connect(
-  mapStateToProps,
-  mapDispatchToProps
-)(withStyles(styles)(ValuePanel))
+// @ts-ignore
+export default connect(mapStateToProps, mapDispatchToProps)(withStyles(styles)(ValuePanel))
@@ -4,8 +4,9 @@ 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'
+import { Fade } from '@material-ui/core'
+import { Decoder } from '../../../../../backend/src/Model/Decoder'

 interface Props {
  message: q.Message
@@ -24,18 +25,34 @@ class ValueRenderer extends React.Component<Props, State> {
    this.state = { width: 0 }
  }

-  private renderDiff(current: string = '', previous: string = '', language?: 'json') {
+  private renderDiff(current: string = '', previous: string = '', title?: string, language?: 'json') {
    return (
      <CodeDiff
        treeNode={this.props.treeNode}
        previous={previous}
        current={current}
+        title={title}
        language={language}
        nameOfCompareMessage={this.props.compareWith ? 'selected' : 'previous'}
      />
    )
  }

+  private convertMessage(msg?: Base64Message): [string | undefined, 'json' | undefined] {
+    if (!msg) {
+      return [undefined, undefined]
+    }
+
+    const str = Base64Message.toUnicodeString(msg)
+    try {
+      JSON.parse(str)
+    } catch (error) {
+      return [str, undefined]
+    }
+
+    return [this.messageToPrettyJson(str), 'json']
+  }
+
  private messageToPrettyJson(str: string): string | undefined {
    try {
      const json = JSON.parse(str)
@@ -45,20 +62,30 @@ class ValueRenderer extends React.Component<Props, State> {
    }
  }

-  private updateWidth = (width: number) => {
-    if (width !== this.state.width) {
-      this.setState({ width })
+  private renderRawMode(message: q.Message, compare?: q.Message) {
+    if (!message.payload) {
+      return
    }
-  }
+    const [value, valueLanguage] = this.convertMessage(message.payload)
+    const [compareStr, compareStrLanguage] =
+      compare && compare.payload ? this.convertMessage(compare.payload) : [undefined, undefined]

-  private renderRawValue(value: string, compare: string) {
-    return this.renderDiff(value, compare)
+    return (
+      <div>
+        {this.renderDiff(value, value, undefined, valueLanguage)}
+        <Fade in={Boolean(compareStr)} timeout={400}>
+          <div>
+            {Boolean(compareStr) ? this.renderDiff(compareStr, compareStr, 'selected', compareStrLanguage) : null}
+          </div>
+        </Fade>
+      </div>
+    )
  }

  public render() {
    return (
-      <div style={{ padding: '0px 0px 8px 8px' }}>
-        <ReactResizeDetector handleWidth={true} onResize={this.updateWidth} />
+      <div style={{ padding: '0px 0px 8px 0px', width: '100%' }}>
+        {this.props.message?.payload?.decoder === Decoder.SPARKPLUG && 'Decoded SparkplugB'}
        {this.renderValue()}
      </div>
    )
@@ -68,38 +95,22 @@ class ValueRenderer extends React.Component<Props, State> {
    const { message, treeNode, compareWith, renderMode } = this.props
    const previousMessages = treeNode.messageHistory.toArray()
    const previousMessage = previousMessages[previousMessages.length - 2]
-    let compareMessage = compareWith || previousMessage || message
+    const compareMessage = compareWith || previousMessage || message
+
    if (renderMode === 'raw') {
-      compareMessage = message
+      return this.renderRawMode(message, compareWith)
    }
-    if (!message.value) {
+    if (!message.payload) {
      return null
    }

-    const compareValue = compareMessage.value || message.value
-    const str = Base64Message.toUnicodeString(message.value)
-    const compareStr = Base64Message.toUnicodeString(compareValue)
+    const compareValue = compareMessage.payload || message.payload
+    const [current, currentLanguage] = this.convertMessage(message.payload)
+    const [compare, compareLanguage] = this.convertMessage(compareValue)

-    let json
-    try {
-      json = JSON.parse(str)
-    } catch (error) {
-      return this.renderRawValue(str, compareStr)
-    }
+    const language = currentLanguage === compareLanguage && compareLanguage === 'json' ? 'json' : undefined

-    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)
-    }
+    return this.renderDiff(current, compare, undefined, language)
  }
 }

@@ -1,48 +1,73 @@
 import * as dotProp from 'dot-prop'
 import * as q from '../../../backend/src/Model'
 import * as React from 'react'
-import PlotHistory from './Sidebar/PlotHistory'
+import PlotHistory from './Chart/Chart'
 import { Base64Message } from '../../../backend/src/Model/Base64Message'
 import { toPlottableValue } from './Sidebar/CodeDiff/util'
 import { PlotCurveTypes } from '../reducers/Charts'
+const parseDuration = require('parse-duration')

 interface Props {
  history: q.MessageHistory
  dotPath?: string
+  timeInterval?: string
  interpolation?: PlotCurveTypes
  range?: [number?, number?]
  color?: string
 }

-function nodeToHistory(history: q.MessageHistory) {
-  return history
-    .toArray()
+function filterUsingTimeRange(startTime: number | undefined, data: Array<q.Message>) {
+  if (startTime) {
+    const threshold = new Date(Date.now() - startTime)
+    return data.filter(d => d.received >= threshold)
+  }
+
+  return data
+}
+
+function nodeToHistory(startTime: number | undefined, history: q.MessageHistory) {
+  return filterUsingTimeRange(startTime, history.toArray())
    .map((message: q.Message) => {
-      const value = message.value ? toPlottableValue(Base64Message.toUnicodeString(message.value)) : NaN
+      const value = message.payload ? toPlottableValue(Base64Message.toUnicodeString(message.payload)) : NaN
      return { x: message.received.getTime(), y: toPlottableValue(value) }
    })
    .filter(data => !isNaN(data.y as any)) as any
 }

-function nodeDotPathToHistory(history: q.MessageHistory, dotPath: string) {
-  return history
-    .toArray()
+function nodeDotPathToHistory(startTime: number | undefined, history: q.MessageHistory, dotPath: string) {
+  return filterUsingTimeRange(startTime, history.toArray())
    .map((message: q.Message) => {
-      let json = {}
+      let json: any = {}
      try {
-        json = message.value ? JSON.parse(Base64Message.toUnicodeString(message.value)) : {}
+        json = message.payload ? JSON.parse(Base64Message.toUnicodeString(message.payload)) : {}
      } catch (ignore) {}

-      let value = dotProp.get(json, dotPath)
+      const value = dotProp.get(json, dotPath)

      return { x: message.received.getTime(), y: toPlottableValue(value) }
    })
    .filter(data => !isNaN(data.y as any)) as any
 }

-function render(props: Props) {
-  const data = props.dotPath ? nodeDotPathToHistory(props.history, props.dotPath) : nodeToHistory(props.history)
-  return <PlotHistory color={props.color} range={props.range} interpolation={props.interpolation} data={data} />
+function TopicPlot(props: Props) {
+  const startOffset = props.timeInterval ? parseDuration(props.timeInterval) : undefined
+  const data = React.useMemo(
+    () =>
+      props.dotPath
+        ? nodeDotPathToHistory(startOffset, props.history, props.dotPath)
+        : nodeToHistory(startOffset, props.history),
+    [props.history.last(), startOffset, props.dotPath]
+  )
+
+  return (
+    <PlotHistory
+      timeRangeStart={startOffset}
+      color={props.color}
+      range={props.range}
+      interpolation={props.interpolation}
+      data={data}
+    />
+  )
 }

-export default render
+export default TopicPlot
@@ -29,7 +29,7 @@ function useStagedRendering(treeNode: q.TreeNode<any>) {
    if (alreadyAdded < edges.length) {
      renderMoreAnimationFrame = (window as any).requestIdleCallback(
        () => {
-          setAlreadyAdded(alreadyAdded * 1.5)
+          setAlreadyAdded(Math.max(25, alreadyAdded * 1.5))
        },
        { timeout: 500 }
      )
@@ -53,7 +53,6 @@ function TreeNodeSubnodes(props: Props) {
        <TreeNode
          key={`${node.hash()}-${props.filter}`}
          treeNode={node}
-          className={props.classes.listItem}
          lastUpdate={node.lastUpdate}
          selectTopicAction={props.selectTopicAction}
          settings={props.settings}
@@ -63,7 +62,7 @@ function TreeNodeSubnodes(props: Props) {
    })

    return <span className={props.classes.list}>{listItems}</span>
-  }, [alreadyAdded, props.lastUpdate, props.theme])
+  }, [alreadyAdded, props.treeNode.lastUpdate, props.theme, props.settings])
 }

 const styles = (theme: Theme) => ({
@@ -1,11 +1,12 @@
-import * as React from 'react'
 import * as q from '../../../../../backend/src/Model'
-import { withStyles, Theme } from '@material-ui/core'
-import { TopicViewModel } from '../../../model/TopicViewModel'
+import React, { memo } from 'react'
 import { Base64Message } from '../../../../../backend/src/Model/Base64Message'
+import { Theme, withStyles } from '@material-ui/core'
+import { TopicViewModel } from '../../../model/TopicViewModel'

 export interface TreeNodeProps extends React.HTMLAttributes<HTMLElement> {
  treeNode: q.TreeNode<TopicViewModel>
+  lastUpdate: number
  name?: string | undefined
  collapsed?: boolean | undefined
  didSelectNode: any
@@ -13,7 +14,7 @@ export interface TreeNodeProps extends React.HTMLAttributes<HTMLElement> {
  classes: any
 }

-class TreeNodeTitle extends React.Component<TreeNodeProps, {}> {
+class TreeNodeTitle extends React.PureComponent<TreeNodeProps, {}> {
  private renderSourceEdge() {
    const name = this.props.name || (this.props.treeNode.sourceEdge && this.props.treeNode.sourceEdge.name)

@@ -24,13 +25,23 @@ class TreeNodeTitle extends React.Component<TreeNodeProps, {}> {
    )
  }

+  private truncatedMessage() {
+    const limit = 400
+    if (!this.props.treeNode.message || !this.props.treeNode.message.payload) {
+      return ''
+    }
+
+    const str = Base64Message.toUnicodeString(this.props.treeNode.message.payload)
+    return str.length > limit ? `${str.slice(0, limit)}…` : str
+  }
+
  private renderValue() {
    return this.props.treeNode.message &&
-      this.props.treeNode.message.value &&
+      this.props.treeNode.message.payload &&
      this.props.treeNode.message.length > 0 ? (
      <span key="value" className={this.props.classes.value}>
        {' '}
-        = {Base64Message.toUnicodeString(this.props.treeNode.message.value).slice(0, 120)}
+        = {this.truncatedMessage()}
      </span>
    ) : null
  }
@@ -53,11 +64,11 @@ class TreeNodeTitle extends React.Component<TreeNodeProps, {}> {
    }

    const messages = this.props.treeNode.leafMessageCount()
+    const topicCount = this.props.treeNode.childTopicCount()
    return (
-      <span
-        key="metadata"
-        className={this.props.classes.collapsedSubnodes}
-      >{`(${this.props.treeNode.childTopicCount()} topics, ${messages} messages)`}</span>
+      <span key="metadata" className={this.props.classes.collapsedSubnodes}>{` (${topicCount} ${
+        topicCount === 1 ? 'topic' : 'topics'
+      }, ${messages} ${messages === 1 ? 'message' : 'messages'})`}</span>
    )
  }

@@ -89,4 +100,4 @@ const styles = (theme: Theme) => ({
  },
 })

-export default withStyles(styles)(TreeNodeTitle)
+export default withStyles(styles)(memo(TreeNodeTitle))
@@ -1,30 +1,38 @@
 import React, { useEffect } from 'react'
+const inViewport = require('in-viewport')

 export function useAnimationToIndicateTopicUpdate(
  ref: React.MutableRefObject<HTMLDivElement | undefined>,
  lastUpdate: number,
  className: string,
  selected: boolean,
+  selectionLastUpdate: number,
  shouldAnimate: boolean
 ) {
  useEffect(() => {
-    if (ref.current && shouldAnimate && Date.now() - lastUpdate < 3000 && !selected) {
+    const selectionDidChange = Date.now() - selectionLastUpdate < 500
+    if (ref.current && shouldAnimate && Date.now() - lastUpdate < 3000 && !selected && !selectionDidChange) {
+      if (!inViewport(ref.current)) {
+        return
+      }
+
+      let timeout: any
      let animationFrame = requestAnimationFrame(() => {
        ref.current && ref.current.classList.add(className)
+
+        timeout = setTimeout(
+          () =>
+            (animationFrame = requestAnimationFrame(() => {
+              ref.current && ref.current.classList.remove(className)
+            })),
+          500
+        )
      })

-      const timeout = setTimeout(
-        () =>
-          (animationFrame = requestAnimationFrame(() => {
-            ref.current && ref.current.classList.remove(className)
-          })),
-        500
-      )
-
      return function cleanup() {
-        clearTimeout(timeout)
+        timeout && clearTimeout(timeout)
        animationFrame && cancelAnimationFrame(animationFrame)
      }
    }
-  }, [lastUpdate, selected, shouldAnimate, className])
+  }, [lastUpdate, selected, selectionLastUpdate, shouldAnimate, className])
 }
@@ -6,11 +6,10 @@ import { treeActions } from '../../../../actions'
 export function useDeleteKeyCallback(topic: q.TreeNode<any>, actions: typeof treeActions) {
  return useCallback(
    (event: React.KeyboardEvent) => {
-      return
      if (event.keyCode === KeyCodes.delete || event.keyCode === KeyCodes.backspace) {
        event.stopPropagation()
        event.preventDefault()
-        actions.clearTopic(topic, true, 50)
+        actions.clearTopic(topic, true)
      }
    },
    [topic]
@@ -4,6 +4,7 @@ import { useEffect, useState } from 'react'
 export function useIsAllowedToAutoExpandState(props: Props): boolean {
  const { settings, treeNode, isRoot } = props
  const [isAllowedToAutoExpand, setAllowAutoExpand] = useState(false)
+
  useEffect(() => {
    const newIsAllowedToAutoExpand = isRoot || treeNode.edgeCount() <= settings.get('autoExpandLimit')
    if (newIsAllowedToAutoExpand !== isAllowedToAutoExpand) {
@@ -0,0 +1,14 @@
+import { useCallback, useState } from 'react'
+
+interface SelectedState {
+  selected: boolean
+  lastUpdate: number
+}
+
+export function useSelectionState(initialSelectionState: boolean): [boolean, number, (selected: boolean) => void] {
+  const [state, setState] = useState<SelectedState>({ selected: initialSelectionState, lastUpdate: 0 })
+  const setSelected = useCallback((selected: boolean) => {
+    setState({ selected, lastUpdate: Date.now() })
+  }, [])
+  return [state.selected, state.lastUpdate, setSelected]
+}
@@ -8,37 +8,37 @@ export function useViewModelSubscriptions(
  setSelected: (value: boolean) => void,
  setCollapsedOverride: (value: boolean) => void
 ) {
-  const selectionDidChange = () => {
-    const selected = treeNode.viewModel && treeNode.viewModel.isSelected()
-    treeNode.viewModel && setSelected(Boolean(selected))
-
-    if (selected && nodeRef && nodeRef.current) {
-      nodeRef.current.focus({ preventScroll: false })
-    }
-  }
-
-  const expandedDidChange = () => {
-    treeNode.viewModel && setCollapsedOverride(!treeNode.viewModel.isExpanded())
-  }
-
  useEffect(() => {
+    const selectionDidChange = () => {
+      const selected = treeNode.viewModel && treeNode.viewModel.isSelected()
+      treeNode.viewModel && setSelected(Boolean(selected))
+
+      if (selected && nodeRef && nodeRef.current) {
+        nodeRef.current.focus({ preventScroll: false })
+      }
+    }
+
+    const expandedDidChange = () => {
+      treeNode.viewModel && setCollapsedOverride(!treeNode.viewModel.isExpanded())
+    }
+
+    function addSubscriber() {
+      treeNode.viewModel = new TopicViewModel()
+      treeNode.viewModel.selectionChange.subscribe(selectionDidChange)
+      treeNode.viewModel.expandedChange.subscribe(expandedDidChange)
+    }
+
+    function removeSubscriber() {
+      if (treeNode.viewModel) {
+        treeNode.viewModel.selectionChange.unsubscribe(selectionDidChange)
+        treeNode.viewModel.expandedChange.unsubscribe(expandedDidChange)
+        treeNode.viewModel = undefined
+      }
+    }
+
    addSubscriber()
    return function cleanup() {
      removeSubscriber()
    }
  }, [treeNode])
-
-  function addSubscriber() {
-    treeNode.viewModel = new TopicViewModel()
-    treeNode.viewModel.selectionChange.subscribe(selectionDidChange)
-    treeNode.viewModel.expandedChange.subscribe(expandedDidChange)
-  }
-
-  function removeSubscriber() {
-    if (treeNode.viewModel) {
-      treeNode.viewModel.selectionChange.unsubscribe(selectionDidChange)
-      treeNode.viewModel.expandedChange.unsubscribe(expandedDidChange)
-      treeNode.viewModel = undefined
-    }
-  }
 }
@@ -11,6 +11,7 @@ import { useAnimationToIndicateTopicUpdate } from './effects/useAnimationToIndic
 import { useDeleteKeyCallback } from './effects/useDeleteKeyCallback'
 import { useIsAllowedToAutoExpandState } from './effects/useIsAllowedToAutoExpandState'
 import { useViewModelSubscriptions } from './effects/useViewModelSubscriptions'
+import { useSelectionState } from './effects/useSelectionState'

 export interface Props {
  isRoot?: boolean
@@ -18,7 +19,6 @@ export interface Props {
  name?: string | undefined
  collapsed?: boolean | undefined
  classes: any
-  className?: string
  lastUpdate: number
  actions: typeof treeActions
  selectTopicAction: (treeNode: q.TreeNode<any>) => void
@@ -27,12 +27,12 @@ export interface Props {
 }

 function TreeNodeComponent(props: Props) {
-  const { actions, classes, className, settings, theme, treeNode, lastUpdate, name } = props
-  const deleteTopicCallback = useDeleteKeyCallback(treeNode, actions)
+  const { actions, classes, settings, theme, treeNode, lastUpdate, name } = props
  const [collapsedOverride, setCollapsedOverride] = useState<boolean | undefined>(undefined)
-  const [selected, setSelected] = useState(false)
+  const [selected, selectionLastUpdate, setSelected] = useSelectionState(false)
  const nodeRef = useRef<HTMLDivElement>()
  const isAllowedToAutoExpand = useIsAllowedToAutoExpandState(props)
+  const deleteTopicCallback = useDeleteKeyCallback(treeNode, actions)
  useViewModelSubscriptions(treeNode, nodeRef, setSelected, setCollapsedOverride)
  const animationClass =
    props.theme.palette.type === 'light' ? props.classes.animationLight : props.classes.animationDark
@@ -42,16 +42,13 @@ function TreeNodeComponent(props: Props) {
    lastUpdate,
    animationClass,
    selected,
+    selectionLastUpdate,
    settings.get('highlightTopicUpdates')
  )

  const isCollapsed =
    Boolean(collapsedOverride) === collapsedOverride ? Boolean(collapsedOverride) : !isAllowedToAutoExpand

-  const toggle = useCallback(() => {
-    setCollapsedOverride(!isCollapsed)
-  }, [isCollapsed])
-
  const didSelectTopic = useCallback(
    (event?: React.MouseEvent) => {
      event && event.stopPropagation()
@@ -64,29 +61,32 @@ function TreeNodeComponent(props: Props) {
    (event: React.MouseEvent) => {
      event.stopPropagation()
      didSelectTopic()
-      toggle()
+      setCollapsedOverride(!isCollapsed)
    },
-    [toggle, didSelectTopic]
+    [isCollapsed, didSelectTopic]
  )

  const toggleCollapsed = useCallback(
    (event: React.MouseEvent) => {
      event.stopPropagation()
-      toggle()
+      setCollapsedOverride(!isCollapsed)
    },
-    [toggle]
+    [isCollapsed]
  )

  const didObtainFocus = useCallback(() => {
    didSelectTopic()
  }, [didSelectTopic])

-  const mouseOver = (event: React.MouseEvent) => {
-    event.stopPropagation()
-    if (settings.get('selectTopicWithMouseOver') && treeNode && treeNode.message && treeNode.message.value) {
-      didSelectTopic()
-    }
-  }
+  const mouseOver = useCallback(
+    (event: React.MouseEvent) => {
+      event.stopPropagation()
+      if (settings.get('selectTopicWithMouseOver') && treeNode && treeNode.message && treeNode.message.payload) {
+        didSelectTopic()
+      }
+    },
+    [didSelectTopic, settings]
+  )

  useEffect(() => {
    treeNode.viewModel && treeNode.viewModel.setExpanded(!isCollapsed, false)
@@ -111,29 +111,30 @@ function TreeNodeComponent(props: Props) {

    const highlightClass = selected ? classes.selected : ''
    return (
-      <div>
-        <div
+      <div className={classes.node}>
+        <span
+          ref={nodeRef as any}
          key={treeNode.hash()}
-          className={`${classes.node} ${className} ${highlightClass} ${classes.title}`}
+          className={`${classes.title} ${highlightClass}`}
          onMouseEnter={mouseOver}
          onFocus={didObtainFocus}
          onClick={didClickTitle}
-          ref={nodeRef as any}
          tabIndex={-1}
          onKeyDown={deleteTopicCallback}
        >
          <TreeNodeTitle
+            lastUpdate={treeNode.lastUpdate}
            toggleCollapsed={toggleCollapsed}
            didSelectNode={didSelectTopic}
            collapsed={isCollapsed}
            treeNode={treeNode}
            name={name}
          />
-        </div>
+        </span>
        {renderNodes()}
      </div>
    )
-  }, [lastUpdate, treeNode, name, isCollapsed, selected, theme])
+  }, [treeNode.lastUpdate, treeNode, name, isCollapsed, selected, theme, mouseOver, settings])
 }

-export default withStyles(styles, { withTheme: true })(TreeNodeComponent)
+export default withStyles(styles, { withTheme: true })(React.memo(TreeNodeComponent))
@@ -6,25 +6,26 @@ export const styles = (theme: Theme) => {
    animationLight: {
      willChange: 'auto',
      translateZ: 0,
-      animation: `updateLight 0.5s`,
+      animation: 'updateLight 0.5s',
    },
    animationDark: {
      willChange: 'auto',
      translateZ: 0,
-      animation: `updateLight 0.5s`,
+      animation: 'updateDark 0.5s',
    },
    collapsedSubnodes: {
      color: theme.palette.text.secondary,
    },
    displayBlock: {
-      display: 'block',
+      display: 'block' as 'block',
    },
    node: {
-      display: 'block',
-      marginLeft: '10px',
-      '&:hover': {
-        backgroundColor: theme.palette.type === 'light' ? blueGrey[100] : theme.palette.primary.light,
-      },
+      display: 'block' as 'block',
+      width: '100%',
+      overflow: 'hidden' as 'hidden',
+      textOverflow: 'ellipsis' as 'ellipsis',
+      whiteSpace: 'nowrap' as 'nowrap',
+      padding: '1px 0px 0px 0px',
    },
    topicSelect: {
      float: 'right' as 'right',
@@ -44,9 +45,12 @@ export const styles = (theme: Theme) => {
      lineHeight: '1em',
      display: 'inline-block' as 'inline-block',
      whiteSpace: 'nowrap' as 'nowrap',
-      padding: '1px 4px 0px 4px',
      height: '14px',
-      margin: '1px 0px 2px 0px',
+      padding: '1px 4px 0 4px',
+      margin: '1px 0px',
+      '&:hover': {
+        backgroundColor: theme.palette.type === 'light' ? blueGrey[100] : theme.palette.primary.light,
+      },
    },
  }
 }
@@ -1,14 +1,13 @@
 import * as q from '../../../../backend/src/Model'
-import React, { useCallback } from 'react'
+import React from 'react'
 import TreeNode from './TreeNode'
 import { AppState } from '../../reducers'
 import { bindActionCreators } from 'redux'
 import { connect } from 'react-redux'
+import { KeyCodes } from '../../utils/KeyCodes'
 import { SettingsState } from '../../reducers/Settings'
 import { TopicViewModel } from '../../model/TopicViewModel'
 import { treeActions } from '../../actions'
-import { KeyCodes } from '../../utils/KeyCodes'
-
 const MovingAverage = require('moving-average')

 const averagingTimeInterval = 10 * 1000
@@ -70,17 +69,17 @@ class TreeComponent extends React.PureComponent<Props, State> {
  public componentWillReceiveProps(nextProps: Props) {
    if (this.props.tree !== nextProps.tree) {
      if (this.props.tree) {
-        this.props.tree.didReceive.unsubscribe(this.throttledTreeUpdate)
+        this.props.tree.didUpdate.unsubscribe(this.throttledTreeUpdate)
      }
      if (nextProps.tree) {
-        nextProps.tree.didReceive.subscribe(this.throttledTreeUpdate)
+        nextProps.tree.didUpdate.subscribe(this.throttledTreeUpdate)
      }
      this.setState(this.state)
    }
  }

  public componentWillUnmount() {
-    this.props.tree && this.props.tree.didReceive.unsubscribe(this.throttledTreeUpdate)
+    this.props.tree && this.props.tree.didUpdate.unsubscribe(this.throttledTreeUpdate)
  }

  public throttledTreeUpdate = () => {
@@ -92,26 +91,26 @@ class TreeComponent extends React.PureComponent<Props, State> {
    const updateInterval = Math.max(expectedRenderTime * 7, 300)
    const timeUntilNextUpdate = updateInterval - (performance.now() - this.renderTime)

-    this.updateTimer = setTimeout(() => {
-      window.requestIdleCallback(
-        () => {
-          this.updateTimer && clearTimeout(this.updateTimer)
-          this.updateTimer = undefined
-          this.renderTime = performance.now()
+    this.updateTimer = setTimeout(
+      () => {
+        window.requestIdleCallback(
+          () => {
+            this.updateTimer && clearTimeout(this.updateTimer)
+            this.updateTimer = undefined
+            this.renderTime = performance.now()

-          if (!this.props.paused) {
-            this.props.tree && this.props.tree.applyUnmergedChanges()
-          }
-          window.requestIdleCallback(
-            () => {
-              this.setState({ lastUpdate: this.renderTime })
-            },
-            { timeout: 100 }
-          )
-        },
-        { timeout: 500 }
-      )
-    }, Math.max(0, timeUntilNextUpdate))
+            window.requestIdleCallback(
+              () => {
+                this.setState({ lastUpdate: this.renderTime })
+              },
+              { timeout: 100 }
+            )
+          },
+          { timeout: 500 }
+        )
+      },
+      Math.max(0, timeUntilNextUpdate)
+    )
  }

  public componentWillUpdate() {
@@ -173,7 +172,4 @@ const mapDispatchToProps = (dispatch: any) => {
  }
 }

-export default connect(
-  mapStateToProps,
-  mapDispatchToProps
-)(TreeComponent)
+export default connect(mapStateToProps, mapDispatchToProps)(TreeComponent)
@@ -13,6 +13,7 @@ import { Theme, withStyles } from '@material-ui/core/styles'
 import { updateNotifierActions } from '../actions'

 import { Button, IconButton, Modal, Paper, Snackbar, SnackbarContent, Typography } from '@material-ui/core'
+import { rendererRpc, getAppVersion } from '../../../events'

 interface Props {
  showUpdateNotification: boolean
@@ -45,23 +46,26 @@ interface State {
  newerVersions: Array<GithubRelease>
 }

-class UpdateNotifier extends React.Component<Props, State> {
+class UpdateNotifier extends React.PureComponent<Props, State> {
  constructor(props: any) {
    super(props)
    this.state = { newerVersions: [] }

-    const ownVersion = electron.remote.app.getVersion()
-    this.fetchReleases().then(releases => {
-      const newerVersions = releases
-        .filter(release => this.allowPrereleaseIfOwnVersionIsBeta(release, ownVersion))
-        .filter(release => compareVersions(release.tag_name, ownVersion) > 0)
-        .sort((a, b) => compareVersions(b.tag_name, a.tag_name))
+    this.checkForUpdates()
+  }

-      if (newerVersions.length > 0) {
-        this.setState({ newerVersions })
-        this.props.actions.showUpdateNotification(true)
-      }
-    })
+  private async checkForUpdates() {
+    const ownVersion = await rendererRpc.call(getAppVersion, undefined, 10000)
+    const releases = await this.fetchReleases()
+    const newerVersions = releases
+      .filter(release => this.allowPrereleaseIfOwnVersionIsBeta(release, ownVersion))
+      .filter(release => compareVersions(release.tag_name, ownVersion) > 0)
+      .sort((a, b) => compareVersions(b.tag_name, a.tag_name))
+
+    if (newerVersions.length > 0) {
+      this.setState({ newerVersions })
+      this.props.actions.showUpdateNotification(true)
+    }
  }

  private allowPrereleaseIfOwnVersionIsBeta(release: GithubRelease, ownVersion: string) {
@@ -266,9 +270,4 @@ const mapDispatchToProps = (dispatch: any) => {
  }
 }

-export default withStyles(styles)(
-  connect(
-    mapStateToProps,
-    mapDispatchToProps
-  )(UpdateNotifier)
-)
+export default withStyles(styles)(connect(mapStateToProps, mapDispatchToProps)(UpdateNotifier))
@@ -37,7 +37,7 @@ interface Props {
  withBackground?: boolean
 }

-class ConnectionHealthIndicator extends React.Component<Props, {}> {
+class ConnectionHealthIndicator extends React.PureComponent<Props, {}> {
  constructor(props: any) {
    super(props)
  }
@@ -19,7 +19,7 @@ interface State {
  didCopy: boolean
 }

-class Copy extends React.Component<Props, State> {
+class Copy extends React.PureComponent<Props, State> {
  constructor(props: Props) {
    super(props)
    this.state = { didCopy: false }
@@ -44,13 +44,9 @@ class Copy extends React.Component<Props, State> {
    )

    return (
-      <span>
-        <span style={{ fontSize: '16px' }}>
-          <CustomIconButton onClick={this.handleClick} tooltip="Copy to clipboard">
-            {icon}
-          </CustomIconButton>
-        </span>
-      </span>
+      <CustomIconButton onClick={this.handleClick} tooltip="Copy to clipboard">
+        <div style={{ marginTop: '2px' }}>{icon}</div>
+      </CustomIconButton>
    )
  }
 }
@@ -63,7 +59,4 @@ const mapDispatchToProps = (dispatch: any) => {
  }
 }

-export default connect(
-  undefined,
-  mapDispatchToProps
-)(Copy)
+export default connect(undefined, mapDispatchToProps)(Copy)
@@ -16,12 +16,15 @@ const styles = (theme: Theme) => ({
    width: '32px',
    height: '32px',
  },
+  tooltip: {
+    marginTop: '-16px',
+  },
  label: {
    marginTop: '-2px',
  },
 })

-class CustomIconButton extends React.Component<Props, {}> {
+class CustomIconButton extends React.PureComponent<Props, {}> {
  constructor(props: Props) {
    super(props)
  }
@@ -34,8 +37,8 @@ class CustomIconButton extends React.Component<Props, {}> {
  public render() {
    return (
      <IconButton className={this.props.classes.button} style={this.props.style} onClick={this.onClick}>
-        <Tooltip title={this.props.tooltip} className={this.props.classes.label}>
-          <span>{this.props.children}</span>
+        <Tooltip title={this.props.tooltip} classes={{ popper: this.props.classes.tooltip }}>
+          <span className={this.props.classes.label}>{this.props.children}</span>
        </Tooltip>
      </IconButton>
    )
@@ -5,6 +5,7 @@ import { connect } from 'react-redux'

 interface Props {
  date: Date
+  timeFirst?: boolean
  overrideLocale?: string
  locale?: string
  intervalSince?: Date
@@ -16,7 +17,7 @@ const unitMapping = {
  h: 'hours',
 }

-class DateFormatter extends React.Component<Props, {}> {
+class DateFormatter extends React.PureComponent<Props, {}> {
  private intervalSince(intervalSince: Date) {
    const interval = intervalSince.getTime() - this.props.date.getTime()
    const unit = this.unitForInterval(interval)
@@ -30,7 +31,7 @@ class DateFormatter extends React.Component<Props, {}> {
  private localizedDate(locale: string) {
    return moment(this.props.date)
      .locale(locale)
-      .format('L LTS')
+      .format(this.props.timeFirst ? 'LTS L' : 'L LTS')
  }

  private unitForInterval(milliseconds: number) {
@@ -0,0 +1,39 @@
+import React from 'react'
+import { AppState } from '../../reducers'
+import { connect } from 'react-redux'
+import { Tooltip } from '@material-ui/core'
+
+function NumberFormatter(props: { locale: string; value: number; grouping?: boolean }) {
+  let formatter: Intl.NumberFormat | undefined
+
+  const formatterOptions = { useGrouping: Boolean(props.grouping) }
+  const defaultFormatter = Intl.NumberFormat(undefined, formatterOptions)
+
+  try {
+    formatter = Intl.NumberFormat(props.locale, formatterOptions)
+  } catch {
+    // locale unknown
+  }
+
+  try {
+    const formatted = (formatter || defaultFormatter).format(props.value)
+
+    return (
+      <Tooltip title={props.value}>
+        <span>{formatted}</span>
+      </Tooltip>
+    )
+  } catch {
+    // localization fail, use fallback
+  }
+
+  return <span>props.value</span>
+}
+
+const mapStateToProps = (state: AppState) => {
+  return {
+    locale: state.settings.get('timeLocale'),
+  }
+}
+
+export default connect(mapStateToProps)(NumberFormatter)
--- a/Show More
+++ b/Show More