Method ValueOfPixel

src/EnvelopeEditor.cpp:138–150

ValueOfPixel() converts a y position on screen to an envelope value. @param y - y position, usually of the mouse.relative to the clip. @param height - height of the rectangle we are in. @upper - true if we are on the upper line, false if on lower. @dB - display mode either linear or log. @zoomMin - vertical scale, typically -1.0 @zoomMax - vertical scale, typically +1.0

/// @zoomMin - vertical scale, typically -1.0
/// @zoomMax - vertical scale, typically +1.0
float EnvelopeEditor::ValueOfPixel( int y, int height, bool upper,
                              bool dB, double dBRange,
                              float zoomMin, float zoomMax)
{
   float v = ::ValueOfPixel(y, height, 0 != mContourOffset, dB, dBRange, zoomMin, zoomMax);

   // MB: this is mostly equivalent to what the old code did, I'm not sure
   // if anything special is needed for asymmetric ranges
   if(upper)
      return mEnvelope.ClampValue(v);
   else
      return mEnvelope.ClampValue(-v);
}

/// HandleMouseButtonDown either finds an existing control point or adds a NEW one
/// which is then recorded as the point to drag.