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compute scroll bar offsets as floats, for smoother scrolling at higher resolutions

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This commit is contained in:
Glenn Maynard
2004-08-14 20:32:55 +00:00
parent c4aadc69e3
commit c54b2fc280
1 changed files with 19 additions and 19 deletions
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stepmania/src/ScrollBar.cpp
+19 -19
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@@ -55,38 +55,38 @@ void ScrollBar::SetPercentage( float fStartPercent, float fEndPercent )
fEndPercent = fmodf( fEndPercent+1, 1 );
CHECKPOINT;
int iPart1TopY, iPart1BottomY, iPart2TopY, iPart2BottomY;
float fPart1TopY, fPart1BottomY, fPart2TopY, fPart2BottomY;
if( fStartPercent < fEndPercent ) // we only need to one 1 thumb part
{
iPart1TopY = (int)SCALE( fStartPercent,0.0f, 1.0f, -iBarContentHeight/2.0f, +iBarContentHeight/2.0f );
iPart1BottomY = (int)SCALE( fEndPercent, 0.0f, 1.0f, -iBarContentHeight/2.0f, +iBarContentHeight/2.0f );
iPart2TopY = 0;
iPart2BottomY = 0;
fPart1TopY = SCALE( fStartPercent,0.0f, 1.0f, -iBarContentHeight/2.0f, +iBarContentHeight/2.0f );
fPart1BottomY = SCALE( fEndPercent, 0.0f, 1.0f, -iBarContentHeight/2.0f, +iBarContentHeight/2.0f );
fPart2TopY = 0;
fPart2BottomY = 0;
}
else // we need two thumb parts
{
iPart1TopY = (int)SCALE( 0.0f, 0.0f, 1.0f, -iBarContentHeight/2.0f, +iBarContentHeight/2.0f );
iPart1BottomY = (int)SCALE( fEndPercent, 0.0f, 1.0f, -iBarContentHeight/2.0f, +iBarContentHeight/2.0f );
iPart2TopY = (int)SCALE( fStartPercent,0.0f, 1.0f, -iBarContentHeight/2.0f, +iBarContentHeight/2.0f );
iPart2BottomY = (int)SCALE( 1.0f, 0.0f, 1.0f, -iBarContentHeight/2.0f, +iBarContentHeight/2.0f );
fPart1TopY = SCALE( 0.0f, 0.0f, 1.0f, -iBarContentHeight/2.0f, +iBarContentHeight/2.0f );
fPart1BottomY = SCALE( fEndPercent, 0.0f, 1.0f, -iBarContentHeight/2.0f, +iBarContentHeight/2.0f );
fPart2TopY = SCALE( fStartPercent,0.0f, 1.0f, -iBarContentHeight/2.0f, +iBarContentHeight/2.0f );
fPart2BottomY = SCALE( 1.0f, 0.0f, 1.0f, -iBarContentHeight/2.0f, +iBarContentHeight/2.0f );
}
CHECKPOINT;
m_sprScrollThumbPart1.StretchTo( RectI(
(int)-m_sprScrollThumbPart1.GetUnzoomedWidth()/2,
iPart1TopY,
(int)+m_sprScrollThumbPart1.GetUnzoomedWidth()/2,
iPart1BottomY
m_sprScrollThumbPart1.StretchTo( RectF(
-m_sprScrollThumbPart1.GetUnzoomedWidth()/2,
fPart1TopY,
+m_sprScrollThumbPart1.GetUnzoomedWidth()/2,
fPart1BottomY
) );
CHECKPOINT;
m_sprScrollThumbPart2.StretchTo( RectI(
(int)-m_sprScrollThumbPart2.GetUnzoomedWidth()/2,
iPart2TopY,
(int)+m_sprScrollThumbPart2.GetUnzoomedWidth()/2,
iPart2BottomY
m_sprScrollThumbPart2.StretchTo( RectF(
-m_sprScrollThumbPart2.GetUnzoomedWidth()/2,
fPart2TopY,
+m_sprScrollThumbPart2.GetUnzoomedWidth()/2,
fPart2BottomY
) );
CHECKPOINT;
}