Method MoveDragPoint

src/EnvelopeEditor.cpp:274–291

}

void EnvelopeEditor::MoveDragPoint(const wxMouseEvent & event, wxRect & r,
                               const ZoomInfo &zoomInfo, bool dB, double dBRange,
                               float zoomMin, float zoomMax)
{
   int clip_y = event.m_y - r.y;
   if(clip_y < 0) clip_y = 0;
   if(clip_y > r.height) clip_y = r.height;
   double newVal = ValueOfPixel(clip_y, r.height, mUpper, dB, dBRange,
                                zoomMin, zoomMax);

   // We no longer tolerate multiple envelope points at the same t.
   // epsilon is less than the time offset of a single sample
   // TODO: However because mTrackEpsilon assumes 200KHz this use
   // of epsilon is a tad bogus.  What we need to do instead is DELETE
   // a duplicated point on a mouse up.
   double newWhen = zoomInfo.PositionToTime(event.m_x, r.x) - mEnvelope.GetOffset();
   mEnvelope.MoveDragPoint(newWhen, newVal);
}

bool EnvelopeEditor::HandleDragging(const wxMouseEvent & event, wxRect & r,
                               const ZoomInfo &zoomInfo, bool dB, double dBRange,