Snap freq drag/place by freq digit right click

src/CubicSDR.cpp

@@ -277,3 +277,13 @@ void CubicSDR::showFrequencyInput() {
     fdialog.ShowModal();
 }
 
+void CubicSDR::setFrequencySnap(int snap) {
+    if (snap > 1000000) {
+        snap = 1000000;
+    }
+    this->snap = snap;
+}
+
+int CubicSDR::getFrequencySnap() {
+    return snap;
+}

src/CubicSDR.h

@@ -22,7 +22,7 @@
 class CubicSDR: public wxApp {
 public:
     CubicSDR() :
-    m_glContext(NULL), frequency(DEFAULT_FREQ), sdrThread(NULL), sdrPostThread(NULL), threadCmdQueueSDR(NULL), iqVisualQueue(NULL), iqPostDataQueue(NULL), audioVisualQueue(NULL), t_SDR(NULL),  t_PostSDR(NULL), sampleRate(DEFAULT_SAMPLE_RATE), offset(0) {
+    m_glContext(NULL), frequency(DEFAULT_FREQ), sdrThread(NULL), sdrPostThread(NULL), threadCmdQueueSDR(NULL), iqVisualQueue(NULL), iqPostDataQueue(NULL), audioVisualQueue(NULL), t_SDR(NULL),  t_PostSDR(NULL), sampleRate(DEFAULT_SAMPLE_RATE), offset(0), snap(1) {
 
     }
 
@@ -51,6 +51,9 @@ public:
     void bindDemodulator(DemodulatorInstance *demod);
     void removeDemodulator(DemodulatorInstance *demod);
 
+    void setFrequencySnap(int snap);
+    int getFrequencySnap();
+
     AppConfig *getConfig();
     void saveConfig();
 
@@ -69,7 +72,7 @@ private:
 
     long long frequency;
     long long offset;
-    int ppm;
+    int ppm, snap;
     long long sampleRate;
 
     SDRThread *sdrThread;

src/visual/TuningCanvas.cpp

@@ -20,6 +20,9 @@ EVT_IDLE(TuningCanvas::OnIdle)
 EVT_MOTION(TuningCanvas::OnMouseMoved)
 EVT_LEFT_DOWN(TuningCanvas::OnMouseDown)
 EVT_LEFT_UP(TuningCanvas::OnMouseReleased)
+EVT_RIGHT_DOWN(TuningCanvas::OnMouseRightDown)
+EVT_RIGHT_UP(TuningCanvas::OnMouseRightReleased)
+
 EVT_LEAVE_WINDOW(TuningCanvas::OnMouseLeftWindow)
 EVT_ENTER_WINDOW(TuningCanvas::OnMouseEnterWindow)
 EVT_MOUSEWHEEL(TuningCanvas::OnMouseWheelMoved)
@@ -124,6 +127,10 @@ void TuningCanvas::OnPaint(wxPaintEvent& WXUNUSED(event)) {
         glContext->DrawTuner(currentPPM, 11, freqDP, freqW);
     } else {
         glContext->DrawTuner(freq, 11, freqDP, freqW);
+        int snap = wxGetApp().getFrequencySnap();
+        if (snap != 1) {
+            glContext->DrawTunerDigitBox((int)log10(snap), 11, freqDP, freqW, RGBColor(1.0,0.0,0.0));
+        }
     }
     glContext->DrawTuner(bw, 7, bwDP, bwW);
     glContext->DrawTuner(center, 11, centerDP, centerW);
@@ -341,6 +348,27 @@ void TuningCanvas::OnMouseReleased(wxMouseEvent& event) {
     SetCursor(wxCURSOR_ARROW);
 }
 
+void TuningCanvas::OnMouseRightDown(wxMouseEvent& event) {
+    InteractiveCanvas::OnMouseRightDown(event);
+}
+
+void TuningCanvas::OnMouseRightReleased(wxMouseEvent& event) {
+    InteractiveCanvas::OnMouseRightReleased(event);
+
+    if (hoverState == TUNING_HOVER_FREQ) {
+        if (hoverIndex == 1) {
+            wxGetApp().setFrequencySnap(1);
+        } else if (hoverIndex > 1 && hoverIndex < 8) {
+            int exp = pow(10, hoverIndex-1);
+            if (wxGetApp().getFrequencySnap() == exp) {
+                wxGetApp().setFrequencySnap(1);
+            } else {
+                wxGetApp().setFrequencySnap(exp);
+            }
+        }
+    }
+}
+
 void TuningCanvas::OnMouseLeftWindow(wxMouseEvent& event) {
     InteractiveCanvas::OnMouseLeftWindow(event);
     SetCursor(wxCURSOR_CROSS);

src/visual/TuningCanvas.h

@@ -35,6 +35,8 @@ private:
     void OnMouseLeftWindow(wxMouseEvent& event);
     void OnKeyDown(wxKeyEvent& event);
     void OnKeyUp(wxKeyEvent& event);
+    void OnMouseRightDown(wxMouseEvent& event);
+    void OnMouseRightReleased(wxMouseEvent& event);
 
     void StepTuner(ActiveState state, int factor, bool up = true);
 

src/visual/TuningContext.cpp

@@ -112,6 +112,34 @@ void TuningContext::DrawTuner(long long freq, int count, float displayPos, float
     glDisable(GL_BLEND);
 }
 
+
+void TuningContext::DrawTunerDigitBox(int index, int count, float displayPos, float displayWidth, RGBColor c) {
+    GLint vp[4];
+    glGetIntegerv( GL_VIEWPORT, vp);
+
+    float viewHeight = (float) vp[3];
+    float viewWidth = (float) vp[2];
+
+    float pixelHeight = 2.0/viewHeight;
+
+    glColor4f(1.0, 0,0,1);
+    glEnable(GL_BLEND);
+    glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
+    float xpos = displayPos + (displayWidth / (float) count) * (float) (count-index);
+    float xpos2 = displayPos + (displayWidth / (float) count) * (float) ((count-1)-index);
+    glBegin(GL_LINE_STRIP);
+    glVertex2f(xpos, 1.0-pixelHeight);
+    glVertex2f(xpos, -1.0+pixelHeight);
+    glVertex2f(xpos2, -1.0+pixelHeight);
+    glVertex2f(xpos2, 1.0-pixelHeight);
+    glVertex2f(xpos, 1.0-pixelHeight);
+    glEnd();
+    glDisable(GL_BLEND);
+}
+
+
+
+
 int TuningContext::GetTunerDigitIndex(float mPos, int count, float displayPos, float displayWidth) {
     mPos -= 0.5;
     mPos *= 2.0;

src/visual/TuningContext.h

@@ -14,6 +14,7 @@ public:
     void DrawBegin();
     void Draw(float r, float g, float b, float a, float p1, float p2);
     void DrawTuner(long long freq, int count, float displayPos, float displayWidth);
+    void DrawTunerDigitBox(int index, int count, float displayPos, float displayWidth, RGBColor c);
     int GetTunerDigitIndex(float mPos, int count, float displayPos, float displayWidth);
     void DrawTunerBarIndexed(int start, int end, int count, float displayPos, float displayWidth, RGBColor color, float alpha, bool top, bool bottom);
 

src/visual/WaterfallCanvas.cpp

@@ -633,12 +633,20 @@ void WaterfallCanvas::OnMouseMoved(wxMouseEvent& event) {
         }
 
         if (dragState == WF_DRAG_FREQUENCY) {
-            long long bwDiff = (long long) (mouseTracker.getDeltaMouseX() * (float) getBandwidth());
+            long long bwTarget = (long long) (mouseTracker.getMouseX() * (float) getBandwidth()) + getCenterFrequency() - (getBandwidth() / 2);
             long long currentFreq = demod->getFrequency();
+            long long bwDiff = bwTarget - currentFreq;
+            int snap = wxGetApp().getFrequencySnap();
 
-            demod->setFrequency(currentFreq + bwDiff);
-            currentFreq = demod->getFrequency();
-            demod->updateLabel(currentFreq);
+            if (snap > 1) {
+                bwDiff = roundf((float)bwDiff/(float)snap)*snap;
+            }
+
+            if (bwDiff) {
+                demod->setFrequency(currentFreq + bwDiff);
+                currentFreq = demod->getFrequency();
+                demod->updateLabel(currentFreq);
+            }
 
             setStatusText("Set demodulator frequency: %s", demod->getFrequency());
         }
@@ -765,13 +773,30 @@ void WaterfallCanvas::OnMouseReleased(wxMouseEvent& event) {
     mouseTracker.setVertDragLock(false);
     mouseTracker.setHorizDragLock(false);
 
-    DemodulatorInstance *demod;
+    DemodulatorInstance *demod = isNew?NULL:wxGetApp().getDemodMgr().getLastActiveDemodulator();
     DemodulatorMgr *mgr = &wxGetApp().getDemodMgr();
 
     if (mouseTracker.getOriginDeltaMouseX() == 0 && mouseTracker.getOriginDeltaMouseY() == 0) {
         float pos = mouseTracker.getMouseX();
         long long input_center_freq = getCenterFrequency();
-        long long freq = input_center_freq - (long long) (0.5 * (float) getBandwidth()) + (long long) ((float) pos * (float) getBandwidth());
+        long long freqTarget = input_center_freq - (long long) (0.5 * (float) getBandwidth()) + (long long) ((float) pos * (float) getBandwidth());
+        long long demodFreq = demod?demod->getFrequency():freqTarget;
+        long long bwDiff = freqTarget - demodFreq;
+        long long freq = demodFreq;
+
+         int snap = wxGetApp().getFrequencySnap();
+
+         if (snap > 1) {
+             if (demod) {
+                 bwDiff = roundf((double)bwDiff/(double)snap)*snap;
+                 freq += bwDiff;
+             } else {
+                 freq = roundl((long double)freq/(double)snap)*snap;
+             }
+         } else {
+             freq += bwDiff;
+         }
+
 
         if (dragState == WF_DRAG_NONE) {
             if (!isNew && wxGetApp().getDemodMgr().getDemodulators().size()) {