diff --git a/DSView/src/appcore/appcontrol.cpp b/DSView/src/appcore/appcontrol.cpp
index 7a0377fb..3d5a13e7 100644
--- a/DSView/src/appcore/appcontrol.cpp
+++ b/DSView/src/appcore/appcontrol.cpp
@@ -181,7 +181,7 @@ void AppControl::remove_font_form(IFontForm *form)
 void AppControl::update_font_forms()
 {
     for (auto f : _font_forms){
-        f->update_font();
+        f->UpdateFont();
     }
 }
 
diff --git a/DSView/src/appcore/mainframe.cpp b/DSView/src/appcore/mainframe.cpp
index 2f2016e2..680bb0de 100644
--- a/DSView/src/appcore/mainframe.cpp
+++ b/DSView/src/appcore/mainframe.cpp
@@ -429,7 +429,7 @@ void MainFrame::readSettings()
     AppConfig &app = AppConfig::Instance(); 
    
     if (app.frameOptions.language > 0){
-         _mainWindow->switchLanguage(app.frameOptions.language);
+         _mainWindow->SwitchLanguage(app.frameOptions.language);
     }
 
       int left = app.frameOptions.left;
diff --git a/DSView/src/appcore/mainwindow.cpp b/DSView/src/appcore/mainwindow.cpp
index dcf006b0..ff7aa6bf 100644
--- a/DSView/src/appcore/mainwindow.cpp
+++ b/DSView/src/appcore/mainwindow.cpp
@@ -238,7 +238,7 @@ namespace appcore {
 
         // defaut language
         AppConfig &app = AppConfig::Instance();
-        switchLanguage(app.frameOptions.language);
+        SwitchLanguage(app.frameOptions.language);
         switchTheme(app.frameOptions.style);
 
         retranslateUi();
@@ -1356,7 +1356,7 @@ namespace appcore {
         return false;
     }
 
-    void MainWindow::switchLanguage(int language)
+    void MainWindow::SwitchLanguage(int language)
     {
         if (language == 0)
             return;
diff --git a/DSView/src/appcore/mainwindow.h b/DSView/src/appcore/mainwindow.h
index fc4f7a3a..0f01636f 100644
--- a/DSView/src/appcore/mainwindow.h
+++ b/DSView/src/appcore/mainwindow.h
@@ -139,7 +139,7 @@ signals:
 
 public:
     //IMainForm
-    void switchLanguage(int language) override;
+    void SwitchLanguage(int language) override;
     bool able_to_close(); 
    
 private: 
diff --git a/DSView/src/data/mathstack.h b/DSView/src/data/mathstack.h
index 9e6e6be5..4864a6cd 100644
--- a/DSView/src/data/mathstack.h
+++ b/DSView/src/data/mathstack.h
@@ -29,18 +29,15 @@
 #include "signaldata.h"
 
 namespace dsv{
-	namespace appcore{
+    namespace appcore{
     	class SigSession; 
 	}
-}
-using namespace dsv::appcore;
-
-namespace dsv{
 	namespace view{
     	class DsoSignal;
         class dslDial;
 	}
 }
+using namespace dsv::appcore;
 using namespace dsv::view;
 
 namespace dsv {
diff --git a/DSView/src/decode/row.h b/DSView/src/decode/row.h
index 66abbe69..cf09c795 100644
--- a/DSView/src/decode/row.h
+++ b/DSView/src/decode/row.h
@@ -23,7 +23,6 @@
 #define DECODE_ROW_H
 
 #include <vector>
-
 #include "annotation.h"
 
 struct srd_decoder;
diff --git a/DSView/src/dialogs/decoderoptionsdlg.cpp b/DSView/src/dialogs/decoderoptionsdlg.cpp
index e787c1c9..acccd61b 100644
--- a/DSView/src/dialogs/decoderoptionsdlg.cpp
+++ b/DSView/src/dialogs/decoderoptionsdlg.cpp
@@ -206,7 +206,7 @@ void DecoderOptionsDlg::load_options_view()
     confirm_button_box->addWidget(button_box, 0, Qt::AlignRight);
     form->addRow(confirm_button_box);
 
-    this->update_font();
+    this->UpdateFont();
 
     int real_content_width = _content_width;
     int content_height = _contentHeight;
diff --git a/DSView/src/dialogs/deviceoptions.cpp b/DSView/src/dialogs/deviceoptions.cpp
index e18096d1..8af806fd 100644
--- a/DSView/src/dialogs/deviceoptions.cpp
+++ b/DSView/src/dialogs/deviceoptions.cpp
@@ -398,7 +398,7 @@ void DeviceOptions::logic_probes(QVBoxLayout &layout)
     enable_all_probes->setMaximumWidth(bt_width);
     disable_all_probes->setMaximumWidth(bt_width);
 
-    this->update_font(); 
+    this->UpdateFont(); 
 
     contentHeight += enable_all_probes->sizeHint().height();
     contentHeight += channel_line_height * row2 + 50;
@@ -734,7 +734,7 @@ void DeviceOptions::analog_probes(QGridLayout &layout)
 
     layout.addWidget(tabWidget, 0, 0, 1, 1);
 
-    this->update_font();
+    this->UpdateFont();
     _groupHeight2 = tabWidget->sizeHint().height() + 10;
     _dynamic_panel->setFixedHeight(_groupHeight2); 
 
@@ -836,7 +836,7 @@ void DeviceOptions::build_dynamic_panel()
 int bb = 0;
 void DeviceOptions::try_resize_scroll()
 {
-    this->update_font();
+    this->UpdateFont();
 
     // content area height
     int contentHeight = _groupHeight1 + _groupHeight2 + 20; // +space
diff --git a/DSView/src/dialogs/dsdialog.cpp b/DSView/src/dialogs/dsdialog.cpp
index 24b0a1d6..98d7a7c0 100644
--- a/DSView/src/dialogs/dsdialog.cpp
+++ b/DSView/src/dialogs/dsdialog.cpp
@@ -129,7 +129,7 @@ int DSDialog::exec()
         connect(_base_button, SIGNAL(accepted()), this, SLOT(accept()));
     }
 
-    update_font();
+    UpdateFont();
  
     return QDialog::exec();
 }
@@ -175,20 +175,20 @@ void DSDialog::build_base(bool hasClose)
     _main_layout->setContentsMargins(10,5,10,10);   
 } 
 
-void DSDialog::update_font()
+void DSDialog::UpdateFont()
 {
     QFont font = this->font();
     font.setPointSizeF(AppConfig::Instance().appOptions.fontSize);
     ui::set_form_font(this, font);
 
     if (_titlebar != NULL){
-        _titlebar->update_font();
+        _titlebar->UpdateFont();
     }
 }
 
 void DSDialog::show()
 {
-    update_font();
+    UpdateFont();
     
     QWidget::show();
 }
diff --git a/DSView/src/dialogs/dsdialog.h b/DSView/src/dialogs/dsdialog.h
index f7ce2323..afcda50c 100644
--- a/DSView/src/dialogs/dsdialog.h
+++ b/DSView/src/dialogs/dsdialog.h
@@ -67,7 +67,7 @@ public:
     void SetTitleSpace(int h);
 
     //IFontForm
-    void update_font() override;
+    void UpdateFont() override;
 
     void show();
 
diff --git a/DSView/src/dialogs/dsmessagebox.cpp b/DSView/src/dialogs/dsmessagebox.cpp
index da05e2e8..7eca6413 100644
--- a/DSView/src/dialogs/dsmessagebox.cpp
+++ b/DSView/src/dialogs/dsmessagebox.cpp
@@ -136,7 +136,7 @@ int DSMessageBox::exec()
     ui::set_form_font(this, font);
 
     if (_titlebar != NULL){
-        _titlebar->update_font();
+        _titlebar->UpdateFont();
     }
 
     return QDialog::exec();
diff --git a/DSView/src/dock/dsotriggerdock.cpp b/DSView/src/dock/dsotriggerdock.cpp
index fd632ab5..bcdc8730 100644
--- a/DSView/src/dock/dsotriggerdock.cpp
+++ b/DSView/src/dock/dsotriggerdock.cpp
@@ -173,7 +173,7 @@ DsoTriggerDock::DsoTriggerDock(QWidget *parent, SigSession *session) :
 
     retranslateUi();
 
-    update_font();
+    UpdateFont();
 }
 
 DsoTriggerDock::~DsoTriggerDock()
@@ -488,7 +488,7 @@ void DsoTriggerDock::update_view()
     connect(_margin_slider, SIGNAL(valueChanged(int)), this, SLOT(margin_changed(int)));
 }
 
-void DsoTriggerDock::update_font()
+void DsoTriggerDock::UpdateFont()
 {
     QFont font = this->font();
     font.setPointSizeF(AppConfig::Instance().appOptions.fontSize);
diff --git a/DSView/src/dock/dsotriggerdock.h b/DSView/src/dock/dsotriggerdock.h
index c76fe1fd..3ce9dfd4 100644
--- a/DSView/src/dock/dsotriggerdock.h
+++ b/DSView/src/dock/dsotriggerdock.h
@@ -63,7 +63,7 @@ private:
     bool check_trig_channel();
 
     //IFontForm
-    void update_font() override;
+    void UpdateFont() override;
 
 signals:
     void set_trig_pos(int percent);
diff --git a/DSView/src/dock/measuredock.cpp b/DSView/src/dock/measuredock.cpp
index b9526303..c3340fb5 100644
--- a/DSView/src/dock/measuredock.cpp
+++ b/DSView/src/dock/measuredock.cpp
@@ -150,7 +150,7 @@ MeasureDock::MeasureDock(QWidget *parent, View &view, SigSession *session) :
     connect(_fen_checkBox, SIGNAL(stateChanged(int)), &_view, SLOT(set_measure_en(int)));
     connect(&_view, SIGNAL(measure_updated()), this, SLOT(measure_updated()));
 
-    update_font();
+    UpdateFont();
 }
 
 MeasureDock::~MeasureDock()
@@ -827,7 +827,7 @@ void MeasureDock::del_cursor()
     _view.update();
 }
 
-void MeasureDock::update_font()
+void MeasureDock::UpdateFont()
 {
     QFont font = this->font();
     font.setPointSizeF(AppConfig::Instance().appOptions.fontSize);
diff --git a/DSView/src/dock/measuredock.h b/DSView/src/dock/measuredock.h
index b50fee85..5c841954 100644
--- a/DSView/src/dock/measuredock.h
+++ b/DSView/src/dock/measuredock.h
@@ -94,7 +94,7 @@ private:
     void reStyle();
 
     //IFontForm
-    void update_font() override;
+    void UpdateFont() override;
 
     void build_dist_pannel();
     void build_edge_pannel();
diff --git a/DSView/src/dock/protocoldock.cpp b/DSView/src/dock/protocoldock.cpp
index c37b5a56..e079c350 100644
--- a/DSView/src/dock/protocoldock.cpp
+++ b/DSView/src/dock/protocoldock.cpp
@@ -226,7 +226,7 @@ ProtocolDock::ProtocolDock(QWidget *parent, view::View &view, SigSession *sessio
 
     connect(_pro_search_button, SIGNAL(clicked()), this, SLOT(show_protocol_select()));
 
-    update_font();
+    UpdateFont();
 }
 
 ProtocolDock::~ProtocolDock()
@@ -1041,7 +1041,7 @@ bool ProtocolDock::protocol_sort_callback(const DecoderInfoItem *o1, const Decod
     }
  }
 
- void ProtocolDock::update_font()
+ void ProtocolDock::UpdateFont()
  {
     QFont font = this->font();
     font.setPointSizeF(AppConfig::Instance().appOptions.fontSize);
@@ -1049,7 +1049,7 @@ bool ProtocolDock::protocol_sort_callback(const DecoderInfoItem *o1, const Decod
     _table_view->setFont(font);
 
     for(auto lay : _protocol_lay_items){
-        lay->update_font();
+        lay->UpdateFont();
     }
 
     font.setPointSizeF(font.pointSizeF() + 1);
diff --git a/DSView/src/dock/protocoldock.h b/DSView/src/dock/protocoldock.h
index 006c6b90..dcd6cfe2 100644
--- a/DSView/src/dock/protocoldock.h
+++ b/DSView/src/dock/protocoldock.h
@@ -120,7 +120,7 @@ private:
     void update_deocder_item_name(void *trace_handel, const char *name) override;
 
     //IFontForm
-    void update_font() override;
+    void UpdateFont() override;
 
 signals:
     void protocol_updated();
diff --git a/DSView/src/dock/protocolitemlayer.cpp b/DSView/src/dock/protocolitemlayer.cpp
index e5b3ef02..85eba075 100644
--- a/DSView/src/dock/protocolitemlayer.cpp
+++ b/DSView/src/dock/protocolitemlayer.cpp
@@ -73,7 +73,7 @@ ProtocolItemLayer::ProtocolItemLayer(QWidget *parent, QString protocolName, IPro
         connect(_set_button, SIGNAL(clicked()),this, SLOT(on_set_protocol()));
         connect(_format_combox, SIGNAL(currentIndexChanged(int)),this, SLOT(on_format_select_changed(int)));
 
-        update_font();
+        UpdateFont();
 }
 
 ProtocolItemLayer::~ProtocolItemLayer(){ 
diff --git a/DSView/src/dock/protocolitemlayer.h b/DSView/src/dock/protocolitemlayer.h
index 38ad3eb7..1d2954c0 100644
--- a/DSView/src/dock/protocolitemlayer.h
+++ b/DSView/src/dock/protocolitemlayer.h
@@ -71,7 +71,7 @@ public:
 
     void set_label_name(QString name);
 
-    void update_font();
+    void UpdateFont();
   
 private slots: 
     void on_set_protocol(); 
diff --git a/DSView/src/dock/searchdock.cpp b/DSView/src/dock/searchdock.cpp
index 71ecfb99..90800e89 100644
--- a/DSView/src/dock/searchdock.cpp
+++ b/DSView/src/dock/searchdock.cpp
@@ -85,7 +85,7 @@ SearchDock::SearchDock(QWidget *parent, View &view, SigSession *session) :
 
     retranslateUi();
 
-    update_font();
+    UpdateFont();
 
     connect(&_pre_button, SIGNAL(clicked()), this, SLOT(on_previous()));
     connect(&_nxt_button, SIGNAL(clicked()),this, SLOT(on_next()));
@@ -254,7 +254,7 @@ void SearchDock::on_set()
     }
 }
 
-void SearchDock::update_font()
+void SearchDock::UpdateFont()
 {
     QFont font = this->font();
     font.setPointSizeF(AppConfig::Instance().appOptions.fontSize);
diff --git a/DSView/src/dock/searchdock.h b/DSView/src/dock/searchdock.h
index 7d3e390d..61eac814 100644
--- a/DSView/src/dock/searchdock.h
+++ b/DSView/src/dock/searchdock.h
@@ -76,7 +76,7 @@ private:
     void reStyle();
 
     //IFontForm
-    void update_font() override;
+    void UpdateFont() override;
 
 public slots:
     void on_previous();
diff --git a/DSView/src/dock/triggerdock.cpp b/DSView/src/dock/triggerdock.cpp
index c999715d..81542b50 100644
--- a/DSView/src/dock/triggerdock.cpp
+++ b/DSView/src/dock/triggerdock.cpp
@@ -134,7 +134,7 @@ TriggerDock::TriggerDock(QWidget *parent, SigSession *session) :
 
     retranslateUi();
 
-    update_font();
+    UpdateFont();
 }
 
 TriggerDock::~TriggerDock()
@@ -1072,7 +1072,7 @@ void TriggerDock::on_serial_hex_changed()
     _is_serial_val_setting = false;
 }
 
-void TriggerDock::update_font()
+void TriggerDock::UpdateFont()
 {
     QFont font = this->font();
     font.setPointSizeF(AppConfig::Instance().appOptions.fontSize);
diff --git a/DSView/src/dock/triggerdock.h b/DSView/src/dock/triggerdock.h
index 6285177a..305c1543 100644
--- a/DSView/src/dock/triggerdock.h
+++ b/DSView/src/dock/triggerdock.h
@@ -90,7 +90,7 @@ private:
     bool commit_trigger();
 
     //IFontForm
-    void update_font() override;
+    void UpdateFont() override;
 
 private slots:
     void simple_trigger();
diff --git a/DSView/src/interface/icallbacks.h b/DSView/src/interface/icallbacks.h
index 2cfed68f..db040596 100644
--- a/DSView/src/interface/icallbacks.h
+++ b/DSView/src/interface/icallbacks.h
@@ -59,11 +59,6 @@ public:
     virtual void OnDlgResult(bool bYes)=0;
 };
 
-class IMainForm{
-public:
-    virtual void switchLanguage(int language)=0;
-};
-
 
 #define DSV_MSG_START_COLLECT_WORK_PREV 5001
 #define DSV_MSG_START_COLLECT_WORK      5002
@@ -108,10 +103,4 @@ public:
     virtual void update_deocder_item_name(void *trace_handel, const char *name)=0;
 };
 
-class IFontForm
-{
-public:
-    virtual void update_font()=0;
-};
-
 #endif
diff --git a/DSView/src/toolbars/filebar.cpp b/DSView/src/toolbars/filebar.cpp
index 8d95c61d..bceaa14b 100644
--- a/DSView/src/toolbars/filebar.cpp
+++ b/DSView/src/toolbars/filebar.cpp
@@ -96,7 +96,7 @@ FileBar::FileBar(SigSession *session, QWidget *parent) :
     connect(_action_export, SIGNAL(triggered()), this, SIGNAL(sig_export()));
     connect(_action_capture, SIGNAL(triggered()), this, SLOT(on_actionCapture_triggered()));
 
-    update_font();
+    UpdateFont();
 }
 
 void FileBar::changeEvent(QEvent *event)
@@ -256,7 +256,7 @@ void FileBar::update_view_status()
     _menu_session->setEnabled(bEnable && is_hardware); 
 }
 
-void FileBar::update_font()
+void FileBar::UpdateFont()
 { 
     QFont font = this->font();
     font.setPointSizeF(AppConfig::Instance().appOptions.fontSize);
diff --git a/DSView/src/toolbars/filebar.h b/DSView/src/toolbars/filebar.h
index d958b6a3..09acd940 100644
--- a/DSView/src/toolbars/filebar.h
+++ b/DSView/src/toolbars/filebar.h
@@ -58,7 +58,7 @@ private:
     void reStyle(); 
 
     //IFontForm
-    void update_font() override;
+    void UpdateFont() override;
 
 signals:
     void sig_load_file(QString); 
diff --git a/DSView/src/toolbars/logobar.cpp b/DSView/src/toolbars/logobar.cpp
index 3bc831e9..18f05d3d 100644
--- a/DSView/src/toolbars/logobar.cpp
+++ b/DSView/src/toolbars/logobar.cpp
@@ -124,7 +124,7 @@ LogoBar::LogoBar(SigSession *session, QWidget *parent) :
     connect(_update, SIGNAL(triggered()), this, SLOT(on_action_update()));
     connect(_log, SIGNAL(triggered()), this, SLOT(on_action_setting_log()));
 
-    update_font();
+    UpdateFont();
 }
 
 void LogoBar::changeEvent(QEvent *event)
@@ -188,7 +188,7 @@ void LogoBar::on_actionEn_triggered()
         QIcon(":/icons/English.svg")));
 
     assert(_mainForm);
-    _mainForm->switchLanguage(LAN_EN);
+    _mainForm->SwitchLanguage(LAN_EN);
 }
 
 void LogoBar::on_actionCn_triggered()
@@ -196,7 +196,7 @@ void LogoBar::on_actionCn_triggered()
     _language->setIcon(QIcon::fromTheme("file",
         QIcon(":/icons/Chinese.svg")));
     assert(_mainForm);
-    _mainForm->switchLanguage(LAN_CN);  
+    _mainForm->SwitchLanguage(LAN_CN);  
 }
 
 void LogoBar::on_actionAbout_triggered()
@@ -348,7 +348,7 @@ void LogoBar::on_clear_log_file()
     }  
 }
 
-void LogoBar::update_font()
+void LogoBar::UpdateFont()
 { 
     QFont font = this->font();
     font.setPointSizeF(AppConfig::Instance().appOptions.fontSize);
diff --git a/DSView/src/toolbars/logobar.h b/DSView/src/toolbars/logobar.h
index 2372a0fc..9bb40270 100644
--- a/DSView/src/toolbars/logobar.h
+++ b/DSView/src/toolbars/logobar.h
@@ -65,7 +65,7 @@ private:
     void reStyle();
 
     //IFontForm
-    void update_font() override;
+    void UpdateFont() override;
 
 signals: 
     //post event message to open user help document, MainWindow class receive it
diff --git a/DSView/src/toolbars/samplingbar.cpp b/DSView/src/toolbars/samplingbar.cpp
index d53a9e58..1d3cdd35 100644
--- a/DSView/src/toolbars/samplingbar.cpp
+++ b/DSView/src/toolbars/samplingbar.cpp
@@ -130,7 +130,7 @@ namespace dsv
             _instant_action = addWidget(&_instant_button); 
 
             update_view_status();
-            update_font();
+            UpdateFont();
 
             connect(&_device_selector, SIGNAL(currentIndexChanged(int)), this, SLOT(on_device_selected()));
             connect(&_configure_button, SIGNAL(clicked()), this, SLOT(on_configure()));
@@ -1257,7 +1257,7 @@ namespace dsv
             on_instant_stop();
         }
 
-        void SamplingBar::update_font()
+        void SamplingBar::UpdateFont()
         { 
             QFont font = this->font();
             font.setPointSizeF(AppConfig::Instance().appOptions.fontSize);
diff --git a/DSView/src/toolbars/samplingbar.h b/DSView/src/toolbars/samplingbar.h
index cc6d338d..7e56aaed 100644
--- a/DSView/src/toolbars/samplingbar.h
+++ b/DSView/src/toolbars/samplingbar.h
@@ -129,7 +129,7 @@ namespace toolbars{
             bool action_instant_stop();
             
             //IFontForm
-            void update_font() override;
+            void UpdateFont() override;
 
         private slots:
             void on_collect_mode();
diff --git a/DSView/src/toolbars/titlebar.cpp b/DSView/src/toolbars/titlebar.cpp
index 645045f9..beffbc08 100644
--- a/DSView/src/toolbars/titlebar.cpp
+++ b/DSView/src/toolbars/titlebar.cpp
@@ -93,7 +93,7 @@ TitleBar::TitleBar(bool top, QWidget *parent, bool hasClose) :
 
     setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Fixed); 
 
-    update_font();
+    UpdateFont();
 }
 
 TitleBar::~TitleBar(){ 
@@ -238,7 +238,7 @@ void TitleBar::mouseDoubleClickEvent(QMouseEvent *event)
     QWidget::mouseDoubleClickEvent(event);
 }
 
-void TitleBar::update_font()
+void TitleBar::UpdateFont()
 {  
     QFont font = this->font();
     font.setPointSizeF(AppConfig::Instance().appOptions.fontSize);
diff --git a/DSView/src/toolbars/titlebar.h b/DSView/src/toolbars/titlebar.h
index d941c5cc..20b67116 100644
--- a/DSView/src/toolbars/titlebar.h
+++ b/DSView/src/toolbars/titlebar.h
@@ -44,7 +44,7 @@ public:
     QString title();
 
     //IFontForm
-    void update_font() override;
+    void UpdateFont() override;
 
 private:
     void changeEvent(QEvent *event);
diff --git a/DSView/src/toolbars/trigbar.cpp b/DSView/src/toolbars/trigbar.cpp
index 8c6d4cb7..722f7714 100644
--- a/DSView/src/toolbars/trigbar.cpp
+++ b/DSView/src/toolbars/trigbar.cpp
@@ -123,7 +123,7 @@ TrigBar::TrigBar(SigSession *session, QWidget *parent) :
     connect(_light_style, SIGNAL(triggered()), this, SLOT(on_actionLight_triggered()));
     connect(_action_dispalyOptions, SIGNAL(triggered()), this, SLOT(on_display_setting()));
 
-    update_font();
+    UpdateFont();
 }
 
 //语言变化
@@ -371,7 +371,7 @@ void TrigBar::update_checked_status()
     _search_button.setChecked(opt->searchDock);
 }
 
-void TrigBar::update_font()
+void TrigBar::UpdateFont()
 { 
     QFont font = this->font();
     font.setPointSizeF(AppConfig::Instance().appOptions.fontSize);
diff --git a/DSView/src/toolbars/trigbar.h b/DSView/src/toolbars/trigbar.h
index 8fba1278..0758ef26 100644
--- a/DSView/src/toolbars/trigbar.h
+++ b/DSView/src/toolbars/trigbar.h
@@ -64,7 +64,7 @@ private:
     void update_checked_status();
 
     //IFontForm
-    void update_font() override;
+    void UpdateFont() override;
 
 signals:
     void sig_setTheme(QString style);
diff --git a/DSView/src/ui/string_ids.h b/DSView/src/uicore/lang_page_ids.h
similarity index 86%
rename from DSView/src/ui/string_ids.h
rename to DSView/src/uicore/lang_page_ids.h
index 2fdd8819..2175e533 100644
--- a/DSView/src/ui/string_ids.h
+++ b/DSView/src/uicore/lang_page_ids.h
@@ -2,7 +2,7 @@
  * This file is part of the DSView project.
  * DSView is based on PulseView.
  *
- * Copyright (C) 2022 DreamSourceLab <support@dreamsourcelab.com>
+ * Copyright (C) 2023 DreamSourceLab <support@dreamsourcelab.com>
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -19,14 +19,17 @@
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
  */
 
-#ifndef STRING_IDS_H
-#define STRING_IDS_H
+#ifndef LANG_PAGE_IDS_H
+#define LANG_PAGE_IDS_H
 
+/**
+ * Language resource page code.
+*/
 #define     STR_PAGE_MSG        1
 #define     STR_PAGE_TOOLBAR    2
 #define     STR_PAGE_DLG        3
 #define     STR_PAGE_DSL        100
 #define     STR_PAGE_DECODER    101
 
-#define IDS_MSG_LOG_LEVEL
+
 #endif
\ No newline at end of file
diff --git a/DSView/src/uicore/langitemlist.cpp b/DSView/src/uicore/langitemlist.cpp
new file mode 100644
index 00000000..4f9a6403
--- /dev/null
+++ b/DSView/src/uicore/langitemlist.cpp
@@ -0,0 +1,84 @@
+/*
+ * This file is part of the DSView project.
+ * DSView is based on PulseView.
+ *
+ * Copyright (C) 2023 DreamSourceLab <support@dreamsourcelab.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
+ */
+
+#include "langitemlist.h"
+#include <assert.h>
+#include "langresource.h"
+
+LangItemList::LangItemList()
+{
+
+}
+
+LangItemList::~LangItemList()
+{
+   Clear();
+}
+
+void LangItemList::Clear()
+{
+    for(auto it = m_items.begin(); it != m_items.end(); it++)
+    {
+        delete (*it).setter;
+    }
+    m_items.clear();
+}
+
+void LangItemList::AddItem(int page_id, const char *key_id, const char *defaultStr, ILangSetter *setter)
+{
+    assert(key_id);
+    assert(defaultStr);
+    assert(setter);
+
+    LangItemInfo item = {page_id, key_id, defaultStr, setter};
+    m_items.push_back(item);
+}
+
+void LangItemList::RemoveItemBySetterHandle(void *setterHandle)
+{
+    assert(setterHandle);
+
+    for(auto it = m_items.begin(); it != m_items.end(); it++)
+    {
+        if ((*it).setter->GetControlHandle() == setterHandle){
+            m_items.erase(it);
+            break;
+        }
+    }
+}
+
+void LangItemList::LoadAllText()
+{
+    for(auto it = m_items.begin(); it != m_items.end(); it++)
+    {
+        int page_id = (*it).lang_page_id;
+        const char *key_id = (*it).key_id;
+        const char *def_str = (*it).default_str;
+        ILangSetter *setter = (*it).setter;
+
+        const char *str = LangResource::Instance()->get_lang_text(page_id, key_id, def_str);
+        if (str == NULL){
+            str = def_str;
+        }
+
+        setter->SetLangText(str);
+    }
+}
\ No newline at end of file
diff --git a/DSView/src/uicore/langitemlist.h b/DSView/src/uicore/langitemlist.h
new file mode 100644
index 00000000..1a3346f2
--- /dev/null
+++ b/DSView/src/uicore/langitemlist.h
@@ -0,0 +1,55 @@
+/*
+ * This file is part of the DSView project.
+ * DSView is based on PulseView.
+ *
+ * Copyright (C) 2023 DreamSourceLab <support@dreamsourcelab.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
+ */
+
+#ifndef LANG_ITEM_LIST_H
+#define LANG_ITEM_LIST_H
+
+#include <vector>
+#include "uitypes.h"
+#include "lang_page_ids.h"
+
+struct LangItemInfo
+{
+    int         lang_page_id;
+    const char *key_id;
+    const char *default_str;
+    ILangSetter *setter;
+};
+
+class LangItemList
+{
+public:
+    LangItemList();
+    ~LangItemList();
+
+    void Clear();
+
+    void AddItem(int page_id, const char *key_id, const char *defaultStr, ILangSetter *setter);
+
+    void RemoveItemBySetterHandle(void *setterHandle);
+
+    void LoadAllText();
+
+private:
+    std::vector<LangItemInfo> m_items;
+};
+
+#endif
\ No newline at end of file
diff --git a/DSView/src/ui/langresource.cpp b/DSView/src/uicore/langresource.cpp
similarity index 100%
rename from DSView/src/ui/langresource.cpp
rename to DSView/src/uicore/langresource.cpp
diff --git a/DSView/src/ui/langresource.h b/DSView/src/uicore/langresource.h
similarity index 99%
rename from DSView/src/ui/langresource.h
rename to DSView/src/uicore/langresource.h
index 63a079e6..19ec41ec 100644
--- a/DSView/src/ui/langresource.h
+++ b/DSView/src/uicore/langresource.h
@@ -27,7 +27,7 @@
 #include <QString>
 #include <string>
 #include <mutex>
-#include "string_ids.h"
+#include "lang_page_ids.h"
 
 struct lang_key_item
 {
diff --git a/DSView/src/uicore/uitypes.h b/DSView/src/uicore/uitypes.h
new file mode 100644
index 00000000..fe3f9068
--- /dev/null
+++ b/DSView/src/uicore/uitypes.h
@@ -0,0 +1,55 @@
+/*
+ * This file is part of the DSView project.
+ * DSView is based on PulseView.
+ *
+ * Copyright (C) 2023 DreamSourceLab <support@dreamsourcelab.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
+ */
+
+#ifndef UICORE_UI_TYPES_H
+#define UICORE_UI_TYPES_H
+
+class ILangSetter
+{
+public:
+    virtual void SetLangText(const char *szText)=0;
+    virtual void* GetControlHandle()=0;
+};
+
+class ILangForm
+{
+public:
+    virtual void LoadLangText()=0;
+};
+
+class IFontForm
+{
+public:
+    virtual void UpdateFont()=0;
+};
+
+class IMainForm
+{
+public:
+    virtual void SwitchLanguage(int language)=0;
+    virtual void AddLangForm(ILangForm *form)=0;
+    virtual void RemoveLangForm(ILangForm *form)=0;    
+    virtual void AddFontForm(IFontForm *form)=0;
+    virtual void RemoveFontForm(IFontForm *form)=0;
+    virtual void UpdateAllFontForm()=0;
+};
+
+#endif
\ No newline at end of file
diff --git a/DSView/src/view/devmode.cpp b/DSView/src/view/devmode.cpp
index 7030e3cb..541a903c 100644
--- a/DSView/src/view/devmode.cpp
+++ b/DSView/src/view/devmode.cpp
@@ -89,7 +89,7 @@ DevMode::DevMode(QWidget *parent, SigSession *session) :
     layout->setStretch(1, 100); 
     setLayout(layout);
 
-    update_font();
+    UpdateFont();
 
     connect(_close_button, SIGNAL(clicked()), this, SLOT(on_close()));
 }
@@ -172,7 +172,7 @@ void DevMode::set_device()
         _bFile = true;
     }
 
-    update_font();
+    UpdateFont();
     update();    
 }
 
@@ -231,7 +231,7 @@ void DevMode::on_mode_change()
         }      
     }
 
-    update_font();
+    UpdateFont();
 }
 
 void DevMode::on_close()
@@ -279,7 +279,7 @@ const struct dev_mode_name* DevMode::get_mode_name(int mode)
     assert(false);
 }
 
-void DevMode::update_font()
+void DevMode::UpdateFont()
 {
     QFont font = this->font();
     font.setPointSizeF(AppConfig::Instance().appOptions.fontSize);
diff --git a/DSView/src/view/devmode.h b/DSView/src/view/devmode.h
index 5c4fa2d5..235ceed2 100644
--- a/DSView/src/view/devmode.h
+++ b/DSView/src/view/devmode.h
@@ -72,7 +72,7 @@ private:
     const struct dev_mode_name* get_mode_name(int mode);
 
     //IFontForm
-    void update_font() override;
+    void UpdateFont() override;
 
 public slots:
     void set_device();
diff --git a/DSView/src/view/view.cpp b/DSView/src/view/view.cpp
index 622bad0f..a72b1eb0 100644
--- a/DSView/src/view/view.cpp
+++ b/DSView/src/view/view.cpp
@@ -1339,7 +1339,7 @@ int  View::get_body_height()
         _time_viewport->update();
  }
 
- void View::update_font()
+ void View::UpdateFont()
  {
     headerWidth();
  }
diff --git a/DSView/src/view/view.h b/DSView/src/view/view.h
index 4850306a..558d6a78 100644
--- a/DSView/src/view/view.h
+++ b/DSView/src/view/view.h
@@ -320,7 +320,7 @@ public:
     }
 
     //IFontForm
-    void update_font() override;
+    void UpdateFont() override;
 
 signals:
 	void hover_point_changed();
diff --git a/DSView/src/view/viewport.cpp b/DSView/src/view/viewport.cpp
index bff5723d..71267f23 100644
--- a/DSView/src/view/viewport.cpp
+++ b/DSView/src/view/viewport.cpp
@@ -106,7 +106,7 @@ Viewport::Viewport(View &parent, View_type type) :
     _xAction = xAction;
  
     setContextMenuPolicy(Qt::CustomContextMenu);
-    this->update_font();
+    this->UpdateFont();
 
     connect(&_trigger_timer, SIGNAL(timeout()),this, SLOT(on_trigger_timer()));
     connect(&_drag_timer, SIGNAL(timeout()),this, SLOT(on_drag_timer())); 
@@ -2001,7 +2001,7 @@ void Viewport::add_cursor_x()
     _view.show_xcursors(true);
 }
 
-void Viewport::update_font()
+void Viewport::UpdateFont()
 {
     QFont font = this->font();
     font.setPointSizeF(AppConfig::Instance().appOptions.fontSize);
diff --git a/DSView/src/view/viewport.h b/DSView/src/view/viewport.h
index 5114acf9..c7525707 100644
--- a/DSView/src/view/viewport.h
+++ b/DSView/src/view/viewport.h
@@ -116,7 +116,7 @@ public:
     void update_lang();
 
     //IFontForm
-    void update_font() override;
+    void UpdateFont() override;
 
 protected:
     bool event(QEvent *event) override;