Proper OpenGL HiDPI handling. Fixes problems with size of OpenGL widgets on HiDPI screens. (PR #769)

src/ui/UITestCanvas.cpp

@@ -36,7 +36,7 @@ UITestCanvas::~UITestCanvas() = default;
 
 void UITestCanvas::OnPaint(wxPaintEvent& WXUNUSED(event)) {
   //  wxPaintDC dc(this);
-    const wxSize ClientSize = GetClientSize();
+    const wxSize ClientSize = GetClientSize() * GetContentScaleFactor();
     
     glContext->SetCurrent(*this);
     initGLExtensions();

src/visual/GainCanvas.cpp

@@ -48,7 +48,7 @@ GainCanvas::~GainCanvas() = default;
 
 void GainCanvas::OnPaint(wxPaintEvent& WXUNUSED(event)) {
   //  wxPaintDC dc(this);
-    const wxSize ClientSize = GetClientSize();
+    const wxSize ClientSize = GetClientSize() * GetContentScaleFactor();
 
     glContext->SetCurrent(*this);
     initGLExtensions();

src/visual/MeterCanvas.cpp

@@ -81,7 +81,7 @@ void MeterCanvas::setShowUserInput(bool showUserInput_in) {
 
 void MeterCanvas::OnPaint(wxPaintEvent& WXUNUSED(event)) {
  //   wxPaintDC dc(this);
-    const wxSize ClientSize = GetClientSize();
+    const wxSize ClientSize = GetClientSize() * GetContentScaleFactor();
 
     glContext->SetCurrent(*this);
     initGLExtensions();

src/visual/ModeSelectorCanvas.cpp

@@ -50,7 +50,7 @@ int ModeSelectorCanvas::getHoveredSelection() {
 
 void ModeSelectorCanvas::OnPaint(wxPaintEvent& WXUNUSED(event)) {
    // wxPaintDC dc(this);
-    const wxSize ClientSize = GetClientSize();
+    const wxSize ClientSize = GetClientSize() * GetContentScaleFactor();
 
     glContext->SetCurrent(*this);
     initGLExtensions();

src/visual/ScopeCanvas.cpp

@@ -98,7 +98,7 @@ bool ScopeCanvas::getShowDb() const {
 
 void ScopeCanvas::OnPaint(wxPaintEvent& WXUNUSED(event)) {
   //  wxPaintDC dc(this);
-    const wxSize ClientSize = GetClientSize();
+    const wxSize ClientSize = GetClientSize() * GetContentScaleFactor();
     
     ScopeRenderDataPtr avData;
     while (inputData->try_pop(avData)) {

src/visual/SpectrumCanvas.cpp

@@ -49,7 +49,7 @@ SpectrumCanvas::~SpectrumCanvas() = default;
 
 void SpectrumCanvas::OnPaint(wxPaintEvent& WXUNUSED(event)) {
   //  wxPaintDC dc(this);
-    const wxSize ClientSize = GetClientSize();
+    const wxSize ClientSize = GetClientSize() * GetContentScaleFactor();
     
     SpectrumVisualDataPtr vData;
     if (visualDataQueue->try_pop(vData)) {

src/visual/TuningCanvas.cpp

@@ -83,7 +83,7 @@ void TuningCanvas::setHalfBand(bool hb) {
 
 void TuningCanvas::OnPaint(wxPaintEvent& WXUNUSED(event)) {
  //   wxPaintDC dc(this);
-    const wxSize ClientSize = GetClientSize();
+    const wxSize ClientSize = GetClientSize() * GetContentScaleFactor();
     
     glContext->SetCurrent(*this);
     initGLExtensions();

src/visual/WaterfallCanvas.cpp

@@ -129,7 +129,7 @@ void WaterfallCanvas::OnPaint(wxPaintEvent& WXUNUSED(event)) {
     std::lock_guard < std::mutex > lock(tex_update);
 //    wxPaintDC dc(this);
     
-    const wxSize ClientSize = GetClientSize();
+    const wxSize ClientSize = GetClientSize() * GetContentScaleFactor();
     long double currentZoom = zoom;
     
     if (mouseZoom != 1) {