Manage B key correctly activated for spectrum, not waterfall. Add another independent B (dB) key for audio scope

src/visual/ScopeCanvas.cpp

@@ -45,7 +45,10 @@ ScopeCanvas::ScopeCanvas(wxWindow *parent, int *dispAttrs) : InteractiveCanvas(p
     parentPanel.setFill(GLPanel::GLPANEL_FILL_NONE);
     scopePanel.setSize(1.0,-1.0);
     spectrumPanel.setSize(1.0,-1.0);
-    spectrumPanel.setShowDb(true);
+    showDb = true;
+    spectrumPanel.setShowDb(showDb);
+    //dB offset is a RF value, has no meaning in audio, disable it.
+    spectrumPanel.setUseDBOffset(false);
 }
 
 ScopeCanvas::~ScopeCanvas() {
@@ -89,8 +92,8 @@ bool ScopeCanvas::getPPMMode() {
     return ppmMode;
 }
 
-void ScopeCanvas::setShowDb(bool showDb) {
-    this->showDb = showDb;
+void ScopeCanvas::setShowDb(bool show) {
+    this->showDb = show;
 }
 
 bool ScopeCanvas::getShowDb() {
@@ -275,3 +278,20 @@ void ScopeCanvas::setHelpTip(std::string tip) {
     helpTip = tip;
 }
 
+void ScopeCanvas::OnKeyDown(wxKeyEvent& event) {
+    InteractiveCanvas::OnKeyDown(event);
+
+    switch (event.GetKeyCode()) {
+
+    case 'B':
+        setShowDb(!getShowDb());
+        break;
+    default:
+        event.Skip();
+    }
+}
+
+void ScopeCanvas::OnKeyUp(wxKeyEvent& event) {
+    InteractiveCanvas::OnKeyUp(event);
+}
+

src/visual/ScopeCanvas.h

@@ -20,6 +20,16 @@ public:
     ScopeCanvas(wxWindow *parent, int *dispAttrs);
     ~ScopeCanvas();
 
+    //This is public because it is indeed forwarded from
+    //AppFrame::OnGlobalKeyDown, because global key handler intercepts 
+    //calls in all windows.
+    void OnKeyDown(wxKeyEvent& event);
+
+    //This is public because it is indeed forwarded from
+    //AppFrame::OnGlobalKeyUp, because global key handler intercepts 
+    //calls in all windows.
+    void OnKeyUp(wxKeyEvent& event);
+
     void setDeviceName(std::string device_name);
     void setPPMMode(bool ppmMode);
     bool getPPMMode();

src/visual/SpectrumCanvas.cpp

@@ -310,3 +310,20 @@ void SpectrumCanvas::OnMouseRightReleased(wxMouseEvent& event) {
     }
     mouseTracker.OnMouseRightReleased(event);
 }
+
+void SpectrumCanvas::OnKeyDown(wxKeyEvent& event) {
+    InteractiveCanvas::OnKeyDown(event);
+
+    switch (event.GetKeyCode()) {
+  
+    case 'B':
+       setShowDb(!getShowDb());
+       break;
+    default:
+        event.Skip();
+    }
+}
+
+void SpectrumCanvas::OnKeyUp(wxKeyEvent& event) {
+    InteractiveCanvas::OnKeyUp(event);
+}

src/visual/SpectrumCanvas.h

@@ -19,6 +19,16 @@ public:
     SpectrumCanvas(wxWindow *parent, int *dispAttrs);
     ~SpectrumCanvas();
 
+    //This is public because it is indeed forwarded from
+    //AppFrame::OnGlobalKeyDown, because global key handler intercepts 
+    //calls in all windows.
+    void OnKeyDown(wxKeyEvent& event);
+
+    //This is public because it is indeed forwarded from
+    //AppFrame::OnGlobalKeyUp, because global key handler intercepts 
+    //calls in all windows.
+    void OnKeyUp(wxKeyEvent& event);
+
     void attachWaterfallCanvas(WaterfallCanvas *canvas_in);
     void moveCenterFrequency(long long freqChange);
 
@@ -50,6 +60,7 @@ private:
     void OnMouseRightDown(wxMouseEvent& event);
     void OnMouseRightReleased(wxMouseEvent& event);
 
+   
     void updateScaleFactor(float factor);
     
     PrimaryGLContext *glContext;

src/visual/WaterfallCanvas.cpp

@@ -440,11 +440,6 @@ void WaterfallCanvas::OnKeyDown(wxKeyEvent& event) {
         wxGetApp().removeDemodulator(activeDemod);
         wxGetApp().getDemodMgr().deleteThread(activeDemod);
         break;
-    case 'B':
-        if (spectrumCanvas) {
-            spectrumCanvas->setShowDb(!spectrumCanvas->getShowDb());
-        }
-        break;
     case WXK_SPACE:
         wxGetApp().showFrequencyInput();
         break;

src/visual/WaterfallCanvas.h

@@ -36,10 +36,21 @@ public:
     void setLinesPerSecond(int lps);
     void setMinBandwidth(int min);
 
+    //This is public because it is indeed forwarded from
+    //AppFrame::OnGlobalKeyDown, because global key handler intercepts 
+    //calls in all windows.
     void OnKeyDown(wxKeyEvent& event);
+
+    //This is public because it is indeed forwarded from
+    //AppFrame::OnGlobalKeyUp, because global key handler intercepts 
+    //calls in all windows.
     void OnKeyUp(wxKeyEvent& event);
+
+    //public because called by SpectrumCanvas.
     void OnMouseWheelMoved(wxMouseEvent& event);
     
+    
+    
 private:
     void OnPaint(wxPaintEvent& event);
     void OnIdle(wxIdleEvent &event);