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Implement alternate colors

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This commit is contained in:
Matthias Neeracher 2007-12-24 11:15:52 +00:00
parent 25d151d5af
commit ee87f6a76b
1 changed files with 22 additions and 4 deletions
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22
Sources/VLSheetView.mm
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@ -492,18 +492,36 @@ const char * sBreak[3] = {"", "\xE2\xA4\xBE", "\xE2\x8E\x98"};
- (void)drawBackgroundForSystem:(int)system
{
const VLSong * song = [self song];
const float kSystemY = [self systemY:system];
const float kLineW = (*fLayout)[system].SystemWidth();
const bool kAltColors = song->fMeasures[fLayout->FirstMeasure(system)].fPropIdx & 1;
NSArray * colors = [NSColor controlAlternatingRowBackgroundColors];
NSColor * bgColor= [colors objectAtIndex:0];
NSColor * fgColor= [colors objectAtIndex:1];
if (kAltColors) {
float hue, saturation, brightness, alpha;
[[fgColor colorUsingColorSpaceName:NSCalibratedRGBColorSpace] getHue:&hue saturation:&saturation
brightness:&brightness alpha:&alpha];
if (saturation) // Color
hue = fmod(hue-0.5f, 1.0f);
else // Black & white
brightness -= 0.05f;
fgColor = [NSColor colorWithCalibratedHue:hue saturation:saturation
brightness:brightness alpha:alpha];
}
[NSGraphicsContext saveGraphicsState];
[[colors objectAtIndex:1] setFill];
[fgColor setFill];
[NSBezierPath fillRect:
NSMakeRect(kLineX, kSystemY-kSystemBaseline,
kLineW, fNumStanzas*kLyricsH)];
[NSBezierPath fillRect:
NSMakeRect(kLineX, kSystemY+kChordY, kLineW, kChordH)];
[[colors objectAtIndex:0] setFill];
[bgColor setFill];
[NSBezierPath fillRect:
NSMakeRect(kLineX, kSystemY-kSystemBaseline+fNumStanzas*kLyricsH,
kLineW, kSystemBaseline+kChordY-fNumStanzas*kLyricsH)];