NSScroller graphical lag/glitches
NSScroller graphical lag/glitches
- Subject: NSScroller graphical lag/glitches
- From: PCWiz <email@hidden>
- Date: Thu, 22 Oct 2009 08:03:17 -0600
Hi,
I have the following NSScroller subclass that creates a scroll bar
with a rounded white knob and no arrows/slot (background):
@implementation IGScrollerVertical
- (void)drawKnob
{
NSRect knobRect = [self rectForPart:NSScrollerKnob];
NSRect newRect = NSMakeRect(knobRect.origin.x,
knobRect.origin.y, knobRect.size.width - 4, knobRect.size.height);
NSBezierPath *path = [NSBezierPath
bezierPathWithRoundedRect:newRect xRadius:7 yRadius:7];
[[NSColor whiteColor] set];
[path fill];
}
- (void)drawArrow:(NSScrollerArrow)arrow highlightPart:(int)flag
{
// We don't want arrows
}
- (void)drawKnobSlotInRect:(NSRect)rect highlight:(BOOL)highlight
{
// Don't want a knob background
}
@end
This all works fine, except there is a noticable lag when I use the
scroller. See this video:
http://twitvid.com/70E7C
I'm confused as to what I'm doing wrong, any suggestions?
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