Separate visual components Scope/Spectrum/Waterfall

Each now on it's own canvas with shared GL Context

src/AppFrame.h

@@ -4,6 +4,9 @@
 #include "PrimaryGLContext.h"
 #include "SDRThread.h"
 #include "ScopeCanvas.h"
+#include "SpectrumCanvas.h"
+#include "WaterfallCanvas.h"
+#include "Demodulator.h"
 
 // Define a new frame type
 class AppFrame: public wxFrame {
@@ -20,12 +23,17 @@ private:
     void OnNewWindow(wxCommandEvent& event);
     void OnIdle(wxIdleEvent& event);
 
-    ScopeCanvas *canvas;
+    ScopeCanvas *scopeCanvas;
+    SpectrumCanvas *spectrumCanvas;
+    WaterfallCanvas *waterfallCanvas;
     SDRThread *t_SDR;
     IQBufferThread *t_IQBuffer;
     wxCriticalSection m_pThreadCS;
     SDRThreadQueue* m_pQueue;
     unsigned int frequency;
 
+    Demodulator test_demod;
+
+// event table
 wxDECLARE_EVENT_TABLE();
 };