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Correct the one-pixel wobble in scroll-scrubbing play indicator...

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... that is, the green line, though the triangle in the ruler still jumps
sometimes.
This commit is contained in:
Paul Licameli 2015-08-26 17:37:26 -04:00
parent a35669a562
commit 67c794891d
2 changed files with 9 additions and 4 deletions
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9
src/TrackPanel.cpp
View File

@ -1214,11 +1214,16 @@ void TrackPanel::TimerUpdateIndicator()
// Calculate the horizontal position of the indicator
pos = gAudioIO->GetStreamTime();
#ifdef EXPERIMENTAL_SCRUBBING_SMOOTH_SCROLL
if (mSmoothScrollingScrub) {
// Pan the view, so that we center the play indicator.
const double duration = GetScreenEndTime() - mViewInfo->h;
mViewInfo->h = pos - duration / 2.0;
const int posX = mViewInfo->TimeToPosition(pos);
int width;
GetTracksUsableArea(&width, NULL);
const int deltaX = posX - width / 2;
mViewInfo->h =
mViewInfo->OffsetTimeByPixels(mViewInfo->h, deltaX, true);
if (!mScrollBeyondZero)
// Can't scroll too far left
mViewInfo->h = std::max(0.0, mViewInfo->h);

4
src/ViewInfo.h
View File

@ -62,9 +62,9 @@ public:
, bool ignoreFisheye = false
) const;
double OffsetTimeByPixels(double time, wxInt64 offset) const
double OffsetTimeByPixels(double time, wxInt64 offset, bool ignoreFisheye = false) const
{
return PositionToTime(offset + TimeToPosition(time));
return PositionToTime(offset + TimeToPosition(time, ignoreFisheye), ignoreFisheye);
}
bool ZoomInAvailable() const;