/*

     File: MovieControllerLayer.m

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#import "MovieControllerLayer.h"

#import <QTKit/QTKit.h>

@interface MovieControllerLayer ()

- (BOOL)_isPlaying;

- (NSTimeInterval)_currentTime;

- (NSTimeInterval)_duration;

@end

@implementation MovieControllerLayer

static CGImageRef createImageNamed(NSString *name)

{

    NSURL *url = [[NSBundle bundleForClass:[MovieControllerLayer class]] URLForResource:name withExtension:@"tiff"];

    if (!url)

        return NULL;

    CGImageSourceRef imageSource = CGImageSourceCreateWithURL((CFURLRef)url, NULL);

    if (!imageSource)

        return NULL;

    CGImageRef image = CGImageSourceCreateImageAtIndex(imageSource, 0, NULL);

    CFRelease(imageSource);

    return image;

}

- (id)init

{

    if (self = [super init]) {

        self.needsDisplayOnBoundsChange = YES;

        self.frame = CGRectMake(0, 0, 0, 25);

        self.autoresizingMask = kCALayerWidthSizable;

        _playImage = createImageNamed(@"Play");

        _pauseImage = createImageNamed(@"Pause");

        _sliderTrackLeft = createImageNamed(@"SliderTrackLeft");

        _sliderTrackRight = createImageNamed(@"SliderTrackRight");

        _sliderTrackCenter = createImageNamed(@"SliderTrackCenter");

        _thumb = createImageNamed(@"Thumb");

    }

    return self;

}

- (void)dealloc

{

    CGImageRelease(_playImage);

    CGImageRelease(_pauseImage);

    CGImageRelease(_sliderTrackLeft);

    CGImageRelease(_sliderTrackRight);

    CGImageRelease(_sliderTrackCenter);

    CGImageRelease(_thumb);

    [self setMovie:nil];

    [_updateTimeTimer invalidate];

    [super dealloc];

}

#pragma mark Drawing

- (CGRect)_playPauseButtonRect

{

    return CGRectMake(0, 0, 25, 25);

}

- (CGRect)_sliderRect

{

    CGFloat sliderYPosition = (self.bounds.size.height - CGImageGetHeight(_sliderTrackLeft)) / 2.0;

    CGFloat playPauseButtonWidth = [self _playPauseButtonRect].size.width;

    return CGRectMake(playPauseButtonWidth, sliderYPosition, 

                      self.bounds.size.width - playPauseButtonWidth - 7, CGImageGetHeight(_sliderTrackLeft));

}

- (CGRect)_sliderThumbRect

{

    CGRect sliderRect = [self _sliderRect];

    CGFloat fraction = 0.0;

    if (_movie)

        fraction = [self _currentTime] / [self _duration];

    CGFloat x = fraction * (CGRectGetWidth(sliderRect) - CGImageGetWidth(_thumb));

    return CGRectMake(CGRectGetMinX(sliderRect) + x, CGRectGetMinY(sliderRect) - 1, 

                      CGImageGetWidth(_thumb), CGImageGetHeight(_thumb));

}

- (CGRect)_innerSliderRect

{

    return CGRectInset([self _sliderRect], CGRectGetWidth([self _sliderThumbRect]) / 2, 0);

}

- (void)_drawPlayPauseButtonInContext:(CGContextRef)context

{

    CGContextDrawImage(context, [self _playPauseButtonRect], [self _isPlaying] ? _pauseImage : _playImage);

}

- (void)_drawSliderInContext:(CGContextRef)context

{

    // Draw the thumb

    CGRect sliderThumbRect = [self _sliderThumbRect];

    CGContextDrawImage(context, sliderThumbRect, _thumb);

    CGRect sliderRect = [self _sliderRect];

    // Draw left part

    CGRect sliderLeftTrackRect = CGRectMake(CGRectGetMinX(sliderRect), CGRectGetMinY(sliderRect), 

                                            CGImageGetWidth(_sliderTrackLeft), CGImageGetHeight(_sliderTrackLeft));

    CGContextDrawImage(context, sliderLeftTrackRect, _sliderTrackLeft);

    // Draw center part

    CGRect sliderCenterTrackRect = CGRectInset(sliderRect, CGImageGetWidth(_sliderTrackLeft), 0);

    CGContextDrawImage(context, sliderCenterTrackRect, _sliderTrackCenter);

    // Draw right part

    CGRect sliderRightTrackRect = CGRectMake(CGRectGetMaxX(sliderCenterTrackRect), CGRectGetMinY(sliderRect), 

                                             CGImageGetWidth(_sliderTrackRight), CGImageGetHeight(_sliderTrackRight));

    CGContextDrawImage(context, sliderRightTrackRect, _sliderTrackRight);

}

- (void)drawInContext:(CGContextRef)context

{

    CGContextSaveGState(context);

    CGContextSetFillColorWithColor(context, CGColorGetConstantColor(kCGColorBlack));

    CGContextFillRect(context, self.bounds);

    CGContextRestoreGState(context);

    [self _drawPlayPauseButtonInContext:context];

    [self _drawSliderInContext:context];

}

#pragma mark Movie handling

- (NSTimeInterval)_currentTime

{

    if (!_movie)

        return 0;

    QTTime time = [_movie currentTime];

    NSTimeInterval timeInterval;

    if (!QTGetTimeInterval(time, &timeInterval))

        return 0;

    return timeInterval;

}

- (NSTimeInterval)_duration

{

    if (!_movie)

        return 0;

    QTTime time = [_movie duration];

    NSTimeInterval timeInterval;

    if (!QTGetTimeInterval(time, &timeInterval))

        return 0;

    return timeInterval;

}

- (BOOL)_isPlaying

{

    return [_movie rate] != 0.0;

}

- (void)_updateTime:(NSTimer *)timer

{

    [self setNeedsDisplay];

}

- (void)_rateDidChange:(NSNotification *)notification

{

    float rate = [[[notification userInfo] objectForKey:QTMovieRateDidChangeNotificationParameter] floatValue];

    if (rate == 0.0) {

        [_updateTimeTimer invalidate];

        _updateTimeTimer = nil;

    } else

        _updateTimeTimer = [NSTimer scheduledTimerWithTimeInterval:0.035 target:self selector:@selector(_updateTime:) userInfo:nil repeats:YES];

    [self setNeedsDisplay];

}

- (void)_timeDidChange:(NSNotification *)notification

{

    [self setNeedsDisplay];

}

- (id<CAAction>)actionForKey:(NSString *)key

{

    // We don't want to animate the contents of the layer.

    if ([key isEqualToString:@"contents"])

        return nil;

    return [super actionForKey:key];

}

- (void)setMovie:(QTMovie *)movie

{

    if (_movie == movie)

        return;

    if (_movie) {

        [[NSNotificationCenter defaultCenter] removeObserver:self 

                                                        name:QTMovieRateDidChangeNotification 

                                                      object:_movie];

        [[NSNotificationCenter defaultCenter] removeObserver:self 

                                                        name:QTMovieTimeDidChangeNotification 

                                                      object:_movie];

        [_movie release];

    }

    _movie = [movie retain];

    if (_movie) {

        [[NSNotificationCenter defaultCenter] addObserver:self

                                                 selector:@selector(_rateDidChange:) 

                                                     name:QTMovieRateDidChangeNotification 

                                                   object:_movie];

        [[NSNotificationCenter defaultCenter] addObserver:self

                                                 selector:@selector(_timeDidChange:) 

                                                     name:QTMovieTimeDidChangeNotification 

                                                   object:_movie];

        [self setNeedsDisplay];

    }

}

# pragma mark Event handling

- (void)_setNewTimeForThumbCenterX:(CGFloat)centerX

{

    CGRect innerRect = [self _innerSliderRect];

    CGFloat fraction = (centerX - CGRectGetMinX(innerRect)) / CGRectGetWidth(innerRect);

    if (fraction > 1.0)

        fraction = 1.0;

    else if (fraction < 0.0)

        fraction = 0.0;

    NSTimeInterval newTime = fraction * [self _duration];

    [_movie setCurrentTime:QTMakeTimeWithTimeInterval(newTime)];

    [self setNeedsDisplay];    

}

- (void)handleMouseDown:(CGPoint)point

{

    if (!_movie)

        return;

    if (CGRectContainsPoint([self _sliderRect], point)) {

        _wasPlayingBeforeMouseDown = [self _isPlaying];

        _isScrubbing = YES;

        [_movie stop];

        if (CGRectContainsPoint([self _sliderThumbRect], point))

            _mouseDownXDelta = point.x - CGRectGetMidX([self _sliderThumbRect]);

        else {

            [self _setNewTimeForThumbCenterX:point.x];

            _mouseDownXDelta = 0;

        }

    }

}

- (void)handleMouseUp:(CGPoint)point

{

    if (!_movie)

        return;

    if (_isScrubbing) {

        _isScrubbing = NO;

        _mouseDownXDelta = 0;

        if (_wasPlayingBeforeMouseDown)

            [_movie play];

        return;

    }

    if (CGRectContainsPoint([self _playPauseButtonRect], point)) {

        if ([self _isPlaying])

            [_movie stop];

        else

            [_movie play];

        return;

    }

}

- (void)handleMouseDragged:(CGPoint)point

{

    if (!_movie)

        return;

    if (!_isScrubbing)

        return;

    point.x -= _mouseDownXDelta;

    [self _setNewTimeForThumbCenterX:point.x];

}

@end