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// Copyright (c) 2009 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#import <Cocoa/Cocoa.h>
#import <QuartzCore/QuartzCore.h>
#import "chrome/browser/cocoa/animatable_view.h"
#import "third_party/GTM/AppKit/GTMNSAnimation+Duration.h"
// NSAnimation subclass that animates the height of an AnimatableView. Allows
// the caller to start and cancel the animation as desired.
@interface HeightAnimation : NSAnimation {
@private
AnimatableView* view_; // weak, owns us.
CGFloat startHeight_;
CGFloat endHeight_;
}
// Initialize a new height animation for the given view. The animation will not
// start until startAnimation: is called.
- (id)initWithView:(AnimatableView*)view
finalHeight:(CGFloat)height
duration:(NSTimeInterval)duration;
@end
@implementation HeightAnimation
- (id)initWithView:(AnimatableView*)view
finalHeight:(CGFloat)height
duration:(NSTimeInterval)duration {
if ((self = [super gtm_initWithDuration:duration
animationCurve:NSAnimationEaseIn])) {
view_ = view;
startHeight_ = [view_ height];
endHeight_ = height;
[self setAnimationBlockingMode:NSAnimationNonblocking];
[self setDelegate:view_];
}
return self;
}
// Overridden to call setHeight for each progress tick.
- (void)setCurrentProgress:(NSAnimationProgress)progress {
[super setCurrentProgress:progress];
[view_ setHeight:((progress * (endHeight_ - startHeight_)) + startHeight_)];
}
@end
@implementation AnimatableView
@synthesize delegate = delegate_;
@synthesize resizeDelegate = resizeDelegate_;
- (void)dealloc {
// Stop the animation if it is running, since it holds a pointer to this view.
[self stopAnimation];
[super dealloc];
}
- (CGFloat)height {
return [self frame].size.height;
}
- (void)setHeight:(CGFloat)newHeight {
// Force the height to be an integer because some animations look terrible
// with non-integer intermediate heights. We only ever set integer heights
// for our views, so this shouldn't be a limitation in practice.
int height = floor(newHeight);
[resizeDelegate_ resizeView:self newHeight:height];
}
- (void)animateToNewHeight:(CGFloat)newHeight
duration:(NSTimeInterval)duration {
[currentAnimation_ stopAnimation];
currentAnimation_.reset([[HeightAnimation alloc] initWithView:self
finalHeight:newHeight
duration:duration]);
if ([resizeDelegate_ respondsToSelector:@selector(setAnimationInProgress:)])
[resizeDelegate_ setAnimationInProgress:YES];
[currentAnimation_ startAnimation];
}
- (void)stopAnimation {
[currentAnimation_ stopAnimation];
}
- (NSAnimationProgress)currentAnimationProgress {
return [currentAnimation_ currentProgress];
}
- (void)animationDidStop:(NSAnimation*)animation {
if ([resizeDelegate_ respondsToSelector:@selector(setAnimationInProgress:)])
[resizeDelegate_ setAnimationInProgress:NO];
if ([delegate_ respondsToSelector:@selector(animationDidStop:)])
[delegate_ animationDidStop:animation];
currentAnimation_.reset(nil);
}
- (void)animationDidEnd:(NSAnimation*)animation {
if ([resizeDelegate_ respondsToSelector:@selector(setAnimationInProgress:)])
[resizeDelegate_ setAnimationInProgress:NO];
if ([delegate_ respondsToSelector:@selector(animationDidEnd:)])
[delegate_ animationDidEnd:animation];
currentAnimation_.reset(nil);
}
@end
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