Added auto-zero to UI for squelch.

Right-Click on signal level bar now sets squelch 2% over current signal level

src/AppFrame.cpp

@@ -141,7 +141,7 @@ AppFrame::AppFrame() :
     demodSignalMeter->setMin(DEMOD_SIGNAL_MIN);
     demodSignalMeter->setLevel(DEMOD_SIGNAL_MIN);
     demodSignalMeter->setInputValue(DEMOD_SIGNAL_MIN);
-    demodSignalMeter->setHelpTip("Current Signal Level.  Click / Drag to set Squelch level.");
+    demodSignalMeter->setHelpTip("Current Signal Level.  Click / Drag to set Squelch level.  Right-Click to Auto-Zero Squelch");
     demodSignalMeter->SetMinSize(wxSize(12,24));
     demodTray->Add(demodSignalMeter, 1, wxEXPAND | wxALL, 0);
 

src/visual/MeterCanvas.cpp

@@ -20,6 +20,8 @@ EVT_IDLE(MeterCanvas::OnIdle)
 EVT_MOTION(MeterCanvas::OnMouseMoved)
 EVT_LEFT_DOWN(MeterCanvas::OnMouseDown)
 EVT_LEFT_UP(MeterCanvas::OnMouseReleased)
+EVT_RIGHT_DOWN(MeterCanvas::OnMouseRightDown)
+EVT_RIGHT_UP(MeterCanvas::OnMouseRightReleased)
 EVT_LEAVE_WINDOW(MeterCanvas::OnMouseLeftWindow)
 EVT_ENTER_WINDOW(MeterCanvas::OnMouseEnterWindow)
 wxEND_EVENT_TABLE()
@@ -126,17 +128,28 @@ void MeterCanvas::OnMouseDown(wxMouseEvent& event) {
     Refresh();
 }
 
-void MeterCanvas::OnMouseWheelMoved(wxMouseEvent& event) {
-    InteractiveCanvas::OnMouseWheelMoved(event);
-    Refresh();
-}
-
 void MeterCanvas::OnMouseReleased(wxMouseEvent& event) {
     InteractiveCanvas::OnMouseReleased(event);
     userInputValue = mouseTracker.getMouseY() * (level_max-level_min) + level_min;
     Refresh();
 }
 
+void MeterCanvas::OnMouseRightDown(wxMouseEvent& event) {
+    InteractiveCanvas::OnMouseRightDown(event);
+    Refresh();
+}
+
+void MeterCanvas::OnMouseRightReleased(wxMouseEvent& event) {
+    InteractiveCanvas::OnMouseRightReleased(event);
+    userInputValue = level - level * 0.02;
+    Refresh();
+}
+
+void MeterCanvas::OnMouseWheelMoved(wxMouseEvent& event) {
+    InteractiveCanvas::OnMouseWheelMoved(event);
+    Refresh();
+}
+
 void MeterCanvas::OnMouseLeftWindow(wxMouseEvent& event) {
     InteractiveCanvas::OnMouseLeftWindow(event);
     SetCursor(wxCURSOR_CROSS);

src/visual/MeterCanvas.h

@@ -38,8 +38,10 @@ private:
 
     void OnMouseMoved(wxMouseEvent& event);
     void OnMouseDown(wxMouseEvent& event);
-    void OnMouseWheelMoved(wxMouseEvent& event);
     void OnMouseReleased(wxMouseEvent& event);
+	void OnMouseWheelMoved(wxMouseEvent& event);
+	void OnMouseRightDown(wxMouseEvent& event);
+	void OnMouseRightReleased(wxMouseEvent& event);
     void OnMouseEnterWindow(wxMouseEvent& event);
     void OnMouseLeftWindow(wxMouseEvent& event);