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@nickjs
Created October 27, 2008 02:47
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/*
* CPPropertyAnimation.j
* AppKit
*
* Created by Nicholas Small.
* Copyright 2008, Nicholas Small.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/*
A VERY basic, but functional, property for Cappuccino. This is not CoreAnimation,
nor anything similar. However, it will handle some basic property animations, and
more can easily be added.
*/
@implementation CPPropertyAnimation : CPAnimation
{
CPView _view;
CPString _keyPath;
CPValue _start;
CPValue _end;
}
- (id)initWithView:(CPView)aView property:(NSString)keyPath
{
self = [super initWithDuration:1.0 animationCurve:CPAnimationLinear];
if(self)
{
if([aView respondsToSelector:keyPath]){
_view = aView;
_keyPath = keyPath;
} else {
return null;
}
}
return self;
}
- (void)setCurrentProgress:(float)progress
{
[super setCurrentProgress:progress];
progress = [self currentValue];
if(_keyPath == 'width' || _keyPath == 'height')
progress = (progress * (_end - _start)) + _start;
else if(_keyPath == 'size')
progress = CGSizeMake((progress * (_end.width - _start.width)) + _start.width, (progress * (_end.height - _start.height)) + _start.height);
else if(_keyPath == 'alphaValue')
progress = (progress * (_end - _start)) + _start;
[_view setValue:progress forKey:_keyPath];
}
- (void)setStart:(id)aValue
{
_start = aValue;
}
- (id)start
{
return _start;
}
- (void)setEnd:(id)aValue
{
_end = aValue;
}
- (id)end
{
return _end;
}
@end
var opacityAnimation = [[CPPropertyAnimation alloc] initWithView:aLabel property:@"alphaValue"];
[opacityAnimation setStart:0.0];
[opacityAnimation setEnd:1.0];
[opacityAnimation setDuration:0.5];
[opacityAnimation startAnimation];
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