107 lines
2.7 KiB
Objective-C
107 lines
2.7 KiB
Objective-C
///**********************************************************************************************************************************
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/// GCOneShotEffectTimer.m
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/// GCDrawKit
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///
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/// Created by graham on 24/04/2007.
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/// Released under the Creative Commons license 2007 Apptree.net.
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///
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///
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/// This work is licensed under the Creative Commons Attribution-ShareAlike 2.5 License.
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/// To view a copy of this license, visit http://creativecommons.org/licenses/by-sa/2.5/ or send a letter to
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/// Creative Commons, 543 Howard Street, 5th Floor, San Francisco, California, 94105, USA.
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///
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///**********************************************************************************************************************************
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#import "GCOneShotEffectTimer.h"
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@interface GCOneShotEffectTimer (Private)
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- (id) initWithTimeInterval:(NSTimeInterval) t forDelegate:(id) del;
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- (void) setDelegate:(id) del;
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- (id) delegate;
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- (void) osfx_callback:(NSTimer*) timer;
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@end
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@implementation GCOneShotEffectTimer
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+ (id) oneShotWithTime:(NSTimeInterval) t forDelegate:(id) del
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{
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GCOneShotEffectTimer* ft = [[GCOneShotEffectTimer alloc] initWithTimeInterval:t forDelegate:del];
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// unlike the usual case, this is returned retained (by self, effectively). The one-shot releases
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// itself when it's complete
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return [ft autorelease];
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}
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- (id) initWithTimeInterval:(NSTimeInterval) t forDelegate:(id) del
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{
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[super init];
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[self setDelegate:del];
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_total = t;
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_timer = [NSTimer scheduledTimerWithTimeInterval:1/60.0f target:self selector:@selector(osfx_callback:) userInfo:nil repeats:YES];
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_start = [NSDate timeIntervalSinceReferenceDate];
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return self;
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}
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- (void) dealloc
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{
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[_timer invalidate];
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[_delegate release];
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[super dealloc];
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}
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- (void) setDelegate:(id) del
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{
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// delegate is retained and released when one-shot completes. This allows some effects to work even
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// though the original delegate might be released by the caller.
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[del retain];
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[_delegate release];
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_delegate = del;
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}
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- (id) delegate
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{
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return _delegate;
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}
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- (void) osfx_callback:(NSTimer*) timer
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{
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NSTimeInterval elapsed = [NSDate timeIntervalSinceReferenceDate] - _start;
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float val = elapsed / _total;
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//NSLog(@"t = %f", val );
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if ( elapsed > _total )
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{
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[timer invalidate];
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_timer = nil;
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if ( _delegate && [_delegate respondsToSelector:@selector(oneShotComplete)])
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[_delegate oneShotComplete];
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[self release];
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}
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else
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{
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if ( _delegate && [_delegate respondsToSelector:@selector(oneShotHasReached:)])
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[_delegate oneShotHasReached:val];
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if ( _delegate && [_delegate respondsToSelector:@selector(oneShotHasReachedInverse:)])
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[_delegate oneShotHasReachedInverse:1.0 - val];
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}
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}
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@end
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