//

 //  GGBLayer.h

 //  GGB-iPhone

 //

 //  Created by Jens Alfke on 3/7/08.

 //  Copyright 2008 __MyCompanyName__. All rights reserved.

 //

 #if TARGET_OS_IPHONE

 #import <QuartzCore/QuartzCore.h>

 #else

 #import <Quartz/Quartz.h>

 #endif

 extern NSString* const GGBLayerStyleChangedNotification;

 @interface GGBLayer : CALayer <NSCopying>

 {

     CABasicAnimation *_curAnimation;

     NSMutableDictionary *_styleDict;

 #if ! TARGET_OS_IPHONE

 }

 #else

 // For some reason, the CALayer class on iPhone OS doesn't have these!

     CGFloat _cornerRadius, _borderWidth;

     CGColorRef _borderColor, _realBGColor;

     unsigned int _autoresizingMask;

 }

 @property CGFloat cornerRadius, borderWidth;

 @property CGColorRef borderColor;

 #endif

 - (void) redisplayAll;

 - (void) animateAndBlock: (NSString*)keyPath from: (id)from to: (id)to duration: (NSTimeInterval)duration;

 /** Change a property in this layer's 'style' dictionary (if it has one),

     and update every other layer that shares the same style dictionary. */

 - (void) setValue: (id)value ofStyleProperty: (NSString*)prop;

 /** Send a message to all sublayers in my tree */

 - (void) makeSublayersPerformSelector: (SEL)selector withObject: (id)object;

 @property (readonly) CATransform3D aggregateTransform;

 /** Call this to notify all sublayers that their aggregate transform has changed. */

 - (void) changedTransform;

 /** Called to notify that a superlayer's transform has changed. */

 - (void) aggregateTransformChanged;

 @end

 /** Moves a layer from one superlayer to another, without changing its position onscreen. */

 void ChangeSuperlayer( CALayer *layer, CALayer *newSuperlayer, int index );

 /** Removes a layer from its superlayer without any fade-out animation. */

 void RemoveImmediately( CALayer *layer );

 /** Disables animations until EndDisableAnimations is called. */

 void BeginDisableAnimations(void);

 void EndDisableAnimations(void);

 CGColorRef GetEffectiveBackground( CALayer *layer );

 NSString* StringFromTransform3D( CATransform3D xform );