Thanks Micke that works
It seems really dumb though that Apple doesn't expose "-
(BOOL)_usesCustomTrackImage" It's a very elegant way to override
drawing of the default track bar. The alternative from that link (By
Dominik Pich)
- (void) drawWithFrame: (NSRect)cellFrame inView: (NSView*)controlView
{
cellFrame = [self drawingRectForBounds: cellFrame];
[super setTrackRect: cellFrame]; //need to access private member
[self drawBarInside: cellFrame flipped: [controlView isFlipped]];
[self drawKnob];
}
@interface NSSliderCell (SetTrackRect)
@end
@implementation NSSliderCell (SetTrackRect)
- (void) setTrackRect: (NSRect)theRect {
_trackRect = theRect;
}
@end
May work but why force developers to write all that override code
when they could just use "_usesCustomTrackImage"?
I can't think of a single good reason to hide this method. Apple
overrides sliders all the time in their own apps. Why make it such a
headache for everyone else?
/rant
-Ken
On Mar 17, 2007, at 4:16 PM, Mikael Gransell wrote:
Hi Ken
Check out this link for a solution and description of your problem.
http://www.cocoabuilder.com/archive/message/cocoa/2007/1/16/177288
Cheers,
Micke
On Mar 17, 2007, at 9:01 PM, Ken Tozier wrote:
Hi
I wrote a custom NSSlider and NSSliderCell, overrode the
"drawKnob:" and "drawBarInside:flipped:" of the NSSliderCell and
got the stuff I want to draw working correctly, but I'm still
getting the default slider bar behind my slider bar. I
intentionally don't call the NSSliderCell's superclass which I
thought would do the trick, but no luck. How can I get rid of the
default?
Thanks for any help
Ken
Here's the slider bar draw method
- (void) drawBarInside:(NSRect) inRect
flipped:(BOOL) inFlipped
{
NSRect adjustedRect = NSMakeRect(inRect.origin.x +
10, 0, inRect.size.width - 20, inRect.size.height);
float rectHeight = inRect.size.height,
leftWidth = [gSliderTrackLeft size].width,
rightWidth = [gSliderTrackRight
size].width,
centerWidth = adjustedRect.size.width -
leftWidth - rightWidth,
adjustedRight = adjustedRect.origin.x +
adjustedRect.size.width,
yOffset = (rectHeight -
DefaultSliderBarHeight) / 2;
NSRect leftRect =
NSMakeRect(adjustedRect.origin.x, adjustedRect.origin.y + yOffset,
leftWidth, DefaultSliderBarHeight),
rightRect = NSMakeRect(adjustedRight -
rightWidth, adjustedRect.origin.y + yOffset, rightWidth,
DefaultSliderBarHeight),
centerRect = NSMakeRect(leftRect.origin.x
+ leftRect.size.width, adjustedRect.origin.y + yOffset,
centerWidth, DefaultSliderBarHeight);
minXOrigin = 10;
maxXOrigin = adjustedRight;
[gSliderTrackLeft drawInRect: leftRect
fromRect: NSZeroRect
operation: NSCompositeSourceOver
fraction: 1.0];
[gSliderTrackCenter drawInRect: centerRect
fromRect: NSZeroRect
operation: NSCompositeSourceOver
fraction: 1.0];
[gSliderTrackRight drawInRect: rightRect
fromRect: NSZeroRect
operation: NSCompositeSourceOver
fraction: 1.0];
}
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