Make decibels display toggleable

src/visual/SpectrumCanvas.cpp

@@ -126,7 +126,6 @@ void SpectrumCanvas::moveCenterFrequency(long long freqChange) {
             freq -= freqChange;
         }
         wxGetApp().setFrequency(freq);
-        setStatusText("Set center frequency: %s", freq);
     }
 }
 
@@ -134,6 +133,10 @@ void SpectrumCanvas::setShowDb(bool showDb) {
     spectrumPanel.setShowDb(showDb);
 }
 
+bool SpectrumCanvas::getShowDb() {
+    return spectrumPanel.getShowDb();
+}
+
 
 void SpectrumCanvas::OnMouseMoved(wxMouseEvent& event) {
     InteractiveCanvas::OnMouseMoved(event);
@@ -144,7 +147,7 @@ void SpectrumCanvas::OnMouseMoved(wxMouseEvent& event) {
             moveCenterFrequency(freqChange);
         }
     } else {
-        setStatusText("Click and drag to adjust center frequency.");
+        setStatusText("Click and drag to adjust center frequency. 'B' to toggle decibels display.");
     }
 }
 

src/visual/SpectrumCanvas.h

@@ -20,6 +20,7 @@ public:
     void moveCenterFrequency(long long freqChange);
 
     void setShowDb(bool showDb);
+    bool getShowDb();
     
     SpectrumVisualDataQueue *getVisualDataQueue();
     

src/visual/WaterfallCanvas.cpp

@@ -338,6 +338,11 @@ void WaterfallCanvas::OnKeyDown(wxKeyEvent& event) {
             activeDemod->setStereo(true);
         }
         break;
+    case 'B':
+        if (spectrumCanvas) {
+            spectrumCanvas->setShowDb(!spectrumCanvas->getShowDb());
+        }
+        break;
     case WXK_SPACE:
         wxGetApp().showFrequencyInput();
         break;