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Smooth zooming on mouse scroll.

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This commit is contained in:
Bartosz Taudul 2019-03-06 01:15:38 +01:00
parent dc2743bcc0
commit 00de21f7e7
1 changed files with 44 additions and 12 deletions
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56
server/TracyView.cpp
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@ -1385,24 +1385,56 @@ void View::HandleZoneViewMouse( int64_t timespan, const ImVec2& wpos, float w, d
const auto wheel = io.MouseWheel;
if( wheel != 0 )
{
m_zoomAnim.active = false;
m_pause = true;
const double mouse = io.MousePos.x - wpos.x;
const auto p = mouse / w;
const auto p1 = timespan * p;
const auto p2 = timespan - p1;
if( wheel > 0 )
if( io.KeyCtrl )
{
m_zvStart += int64_t( p1 * 0.25 );
m_zvEnd -= int64_t( p2 * 0.25 );
m_zoomAnim.active = false;
m_pause = true;
const auto p1 = timespan * p;
const auto p2 = timespan - p1;
if( wheel > 0 )
{
m_zvStart += int64_t( p1 * 0.25 );
m_zvEnd -= int64_t( p2 * 0.25 );
}
else if( timespan < 1000ll * 1000 * 1000 * 60 * 60 )
{
m_zvStart -= std::max( int64_t( 1 ), int64_t( p1 * 0.25 ) );
m_zvEnd += std::max( int64_t( 1 ), int64_t( p2 * 0.25 ) );
}
timespan = m_zvEnd - m_zvStart;
pxns = w / double( timespan );
}
else if( timespan < 1000ll * 1000 * 1000 * 60 * 60 )
else
{
m_zvStart -= std::max( int64_t( 1 ), int64_t( p1 * 0.25 ) );
m_zvEnd += std::max( int64_t( 1 ), int64_t( p2 * 0.25 ) );
int64_t t0, t1;
if( m_zoomAnim.active )
{
t0 = m_zoomAnim.start1;
t1 = m_zoomAnim.end1;
}
else
{
t0 = m_zvStart;
t1 = m_zvEnd;
}
const auto zoomSpan = t1 - t0;
const auto p1 = zoomSpan * p;
const auto p2 = zoomSpan - p1;
if( wheel > 0 )
{
t0 += int64_t( p1 * 0.25 );
t1 -= int64_t( p2 * 0.25 );
}
else if( zoomSpan < 1000ll * 1000 * 1000 * 60 * 60 )
{
t0 -= std::max( int64_t( 1 ), int64_t( p1 * 0.25 ) );
t1 += std::max( int64_t( 1 ), int64_t( p2 * 0.25 ) );
}
ZoomToRange( t0, t1 );
}
timespan = m_zvEnd - m_zvStart;
pxns = w / double( timespan );
}
}