TrackArt.h File Reference

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Namespaces
namespace	TrackArt

Functions
AUDACITY_DLL_API wxRect	TrackArt::DrawClipAffordance (wxDC &dc, const wxRect &affordanceRect, bool highlight=false, bool selected=false)
AUDACITY_DLL_API bool	TrackArt::DrawClipTitle (wxDC &dc, const wxRect &titleRect, const wxString &title)
AUDACITY_DLL_API bool	TrackArt::DrawAudioClipTitle (wxDC &dc, const wxRect &titleRect, const wxString &title, double clipStretchRatio)
AUDACITY_DLL_API void	TrackArt::DrawClipEdges (wxDC &dc, const wxRect &clipRect, bool selected=false)
AUDACITY_DLL_API void	TrackArt::DrawClipFolded (wxDC &dc, const wxRect &rect)
AUDACITY_DLL_API void	TrackArt::DrawSyncLockTiles (TrackPanelDrawingContext &context, const wxRect &rect)
AUDACITY_DLL_API void	TrackArt::DrawBackgroundWithSelection (TrackPanelDrawingContext &context, const wxRect &rect, const Track *track, const wxBrush &selBrush, const wxBrush &unselBrush, bool useSelection=true)
AUDACITY_DLL_API void	TrackArt::DrawCursor (TrackPanelDrawingContext &context, const wxRect &rect, const Track *track)
AUDACITY_DLL_API void	TrackArt::DrawNegativeOffsetTrackArrows (TrackPanelDrawingContext &context, const wxRect &rect)
AUDACITY_DLL_API wxString	TrackArt::TruncateText (wxDC &dc, const wxString &text, const int maxWidth)
AUDACITY_DLL_API int	GetWaveYPos (float value, float min, float max, int height, bool dB, bool outer, float dBr, bool clip)
float	FromDB (float value, double dBRange)
AUDACITY_DLL_API float	ValueOfPixel (int yy, int height, bool offset, bool dB, double dBRange, float zoomMin, float zoomMax)

Variables
static constexpr int	TrackArt::ClipFrameRadius { 6 }

Function Documentation

FromDB()

float FromDB	(	float	value,
		double	dBRange
	)

Definition at line 106 of file TrackArt.cpp.

{
   if (value == 0)
      return 0;
 
   double sign = (value >= 0 ? 1 : -1);
   return DB_TO_LINEAR((fabs(value) * dBRange) - dBRange) * sign;
}

References DB_TO_LINEAR.

Referenced by ValueOfPixel().

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GetWaveYPos()

AUDACITY_DLL_API int GetWaveYPos	(	float	value,
		float	min,
		float	max,
		int	height,
		bool	dB,
		bool	outer,
		float	dBr,
		bool	clip
	)

Takes a value between min and max and returns a value between height and 0

Definition at line 59 of file TrackArt.cpp.

{
   if (dB) {
      if (height == 0) {
         return 0;
      }
 
      float sign = (value >= 0 ? 1 : -1);
 
      if (value != 0.) {
         float db = LINEAR_TO_DB(fabs(value));
         value = (db + dBr) / dBr;
         if (!outer) {
            value -= 0.5;
         }
         if (value < 0.0) {
            value = 0.0;
         }
         value *= sign;
      }
   }
   else {
      if (!outer) {
         if (value >= 0.0) {
            value -= 0.5;
         }
         else {
            value += 0.5;
         }
      }
   }
 
   if (clip) {
      if (value < min) {
         value = min;
      }
      if (value > max) {
         value = max;
      }
   }
 
   value = (max - value) / (max - min);
   return (int) (value * (height - 1) + 0.5);
}

References LINEAR_TO_DB, min(), and outer.

Referenced by anonymous_namespace{WaveformView.cpp}::DrawEnvelope(), anonymous_namespace{WaveformView.cpp}::DrawIndividualSamples(), anonymous_namespace{WaveformView.cpp}::DrawMinMaxRMS(), EnvelopeEditor::DrawPoints(), anonymous_namespace{WaveformView.cpp}::DrawWaveformBackground(), EnvelopeEditor::HandleMouseButtonDown(), EnvelopeHandle::HitEnvelope(), and SampleHandle::HitTest().

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ValueOfPixel()

AUDACITY_DLL_API float ValueOfPixel	(	int	yy,
		int	height,
		bool	offset,
		bool	dB,
		double	dBRange,
		float	zoomMin,
		float	zoomMax
	)

Definition at line 115 of file TrackArt.cpp.

{
   wxASSERT(height > 0);
   // Map 0 to max and height - 1 (not height) to min
   float v =
      height == 1 ? (zoomMin + zoomMax) / 2 :
      zoomMax - (yy / (float)(height - 1)) * (zoomMax - zoomMin);
   if (offset) {
      if (v > 0.0)
         v += .5;
      else
         v -= .5;
   }
 
   if (dB)
      v = FromDB(v, dBRange);
 
   return v;
}

References FromDB().

Referenced by SampleHandle::FindSampleEditingLevel().

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