TrackArt.cpp File Reference

#include "TrackArt.h"
#include "AColor.h"
#include "AllThemeResources.h"
#include "SelectedRegion.h"
#include "SyncLock.h"
#include "Theme.h"
#include "TimeAndPitchInterface.h"
#include "Track.h"
#include "TrackArtist.h"
#include "TrackPanelDrawingContext.h"
#include "ZoomInfo.h"
#include "TimeDisplayMode.h"
#include "ProjectTimeRuler.h"
#include "ProjectTimeSignature.h"
#include "widgets/BeatsFormat.h"
#include <wx/app.h>
#include <wx/dc.h>
#include <cassert>
#include <cstdint>
#include <cmath>
#include <utility>

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Classes
struct	anonymous_namespace{TrackArt.cpp}::BeatsGridlinePainter

Namespaces
namespace	anonymous_namespace{TrackArt.cpp}

Functions
wxRect	anonymous_namespace{TrackArt.cpp}::GetAffordanceTitleRect (const wxRect &rect)
wxString	anonymous_namespace{TrackArt.cpp}::GetTruncatedTitle (wxDC &dc, const wxString &title, const wxRect &affordanceRect)
int	GetWaveYPos (float value, float min, float max, int height, bool dB, bool outer, float dBr, bool clip)
float	FromDB (float value, double dBRange)
float	ValueOfPixel (int yy, int height, bool offset, bool dB, double dBRange, float zoomMin, float zoomMax)
wxRect	anonymous_namespace{TrackArt.cpp}::GetClipAffordanceRect (wxDC &dc, const wxRect &clipRect, std::optional< wxRect > &clippedClipRect)
wxRect	anonymous_namespace{TrackArt.cpp}::GetClipTruncatedTitleRect (wxDC &dc, const wxRect &affordanceRect, const wxString &title)
const AudacityProject &	anonymous_namespace{TrackArt.cpp}::GetProject (const Track &track)

Variables
static constexpr int	ClipSelectionStrokeSize { 1 }
constexpr double	anonymous_namespace{TrackArt.cpp}::minSubdivisionWidth = 12.0

Function Documentation

FromDB()

float FromDB	(	float	value,
		double	dBRange
	)

Definition at line 113 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()

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 66 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(), EnvelopeEditor::DrawPoints(), anonymous_namespace{WaveformView.cpp}::DrawWaveformBackground(), EnvelopeEditor::HandleMouseButtonDown(), EnvelopeHandle::HitEnvelope(), and SampleHandle::HitTest().

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ValueOfPixel()

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

Definition at line 122 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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Variable Documentation

ClipSelectionStrokeSize

constexpr int ClipSelectionStrokeSize { 1 }

staticconstexpr

Definition at line 38 of file TrackArt.cpp.

Referenced by TrackArt::DrawClipAffordance(), TrackArt::DrawClipEdges(), and anonymous_namespace{TrackArt.cpp}::GetAffordanceTitleRect().