HI
I'm writing a subclass of CALayer and what I'm seeing is that regardless of
whether I wrap CG drawing commands in a CATransaction, or not, it still
animates. One of the properties of the subclass is a "suppressAnimations" BOOL
which, if set, is used in the draw method to dispatch the incoming layer and
context to a "suppressed" or "normal" draw method. Here's the my drawInContext
method:
- (void) drawInContext:(CGContextRef) inContext
{
if (suppressAnimations == YES)
[self drawInContextSuppressed: inContext];
else
[self drawInContextNormal: inContext];
}
And here are the "suppressed" and "normal" draw methods
- (void) drawInContextSuppressed:(CGContextRef) inContext
{
NSLog(@"Entered: drawInContextSuppressed");
[CATransaction begin];
[CATransaction setValue:[NSNumber numberWithFloat:0.0f]
forKey:kCATransactionAnimationDuration];
[self drawInContextNormal: inContext];
[CATransaction commit];
}
- (void) drawInContextNormal:(CGContextRef) inContext
{
CGPathRef path = [self bezelPath]; // doesn't do any drawing, just
generates a CGPathRef
NSData *imgData = [properties objectForKey: @"backgroundImage"];
CGContextSaveGState(inContext);
CGContextBeginPath(inContext);
CGContextAddPath(inContext, path );
CGContextEOClip(inContext);
if (imgData != nil)
[self drawImage: imgData inContext: inContext];
CFRelease(path);
CGContextRestoreGState(inContext);
}
I tried the suggestion by David Duncan here
(http://www.cocoabuilder.com/archive/cocoa/279886-calayer-with-no-animation.html)
and overrode
- (id) actionForKey:(NSString *) inKey
{
NSLog(@"actionForKey: %@", inKey);
if ([inKey isEqualToString: @"contents"])
return nil;
}
But I'm still getting animation.
Anyone see where I'm going
astray?_______________________________________________
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