Cog/Application/DockIconController.m

//
//  DockIconController.m
//  Cog
//
//  Created by Vincent Spader on 2/28/09.
//  Copyright 2009 __MyCompanyName__. All rights reserved.
//

#import "DockIconController.h"
#import <CogAudio/Status.h>

@implementation DockIconController

static NSString *DockIconPlaybackStatusObservationContext = @"DockIconPlaybackStatusObservationContext";

- (void)startObserving
{
	[playbackController addObserver:self forKeyPath:@"playbackStatus" options:(NSKeyValueObservingOptionNew | NSKeyValueObservingOptionInitial) context:DockIconPlaybackStatusObservationContext];
}

- (void)stopObserving
{
	[playbackController removeObserver:self forKeyPath:@"playbackStatus"];
}

- (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary *)change context:(void *)context
{
	if ([DockIconPlaybackStatusObservationContext isEqual:context])
	{
		NSInteger playbackStatus = [[change objectForKey:NSKeyValueChangeNewKey] integerValue];
		
		NSImage *badgeImage = nil;
		
		if (playbackStatus == kCogStatusPlaying) {
			badgeImage = [NSImage imageNamed:@"playDockBadge"];
		}
		else if (playbackStatus == kCogStatusPaused) {
			badgeImage = [NSImage imageNamed:@"pauseDockBadge"];
		}
		else {
			badgeImage = [NSImage imageNamed:@"stopDockBadge"];
		}
		
		NSSize badgeSize = [badgeImage size];
		
		NSImage *newDockImage = [dockImage copy];
		[newDockImage lockFocus];
		[badgeImage drawInRect:NSMakeRect(0, 0, 128, 128) fromRect:NSMakeRect(0, 0, badgeSize.width, badgeSize.height) operation:NSCompositeSourceOver fraction:1.0];
		[newDockImage unlockFocus];
		[NSApp setApplicationIconImage:newDockImage];
		[newDockImage release];
	}
	else
	{
		[super observeValueForKeyPath:keyPath ofObject:object change:change context:context];
	}
}

- (void)awakeFromNib
{
	dockImage = [[NSImage imageNamed:@"icon_blank"] copy];
	[self startObserving];
}

- (void)dealloc
{
	[self stopObserving];
	[dockImage release];
	
	[super dealloc];
}

@end