InterAppAudioHost/InterAppAudioHost/UI/CAUITransportView.mm

/*
     File: CAUITransportView.mm
 Abstract: 
  Version: 1.1.2
 
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 */
 
#import "CAUITransportView.h"
#import "AppDelegate.h"
 
@implementation CAUITransportView
 
#pragma mark - Initialization
- (void) awakeFromNib {
    rewindButton.drawingStyle = rewindButtonStyle;
    playPauseButton.drawingStyle = pauseButtonStyle;
    recordButton.drawingStyle = recordButtonStyle;
    
    rewindButton.fillColor = [UIColor colorWithWhite: .937f alpha:1].CGColor;
    playPauseButton.fillColor = [UIColor colorWithWhite: .937f alpha:1].CGColor;
    recordButton.fillColor = [UIColor colorWithRed:.984f green:.251f blue:.173f alpha:1.0].CGColor;
    
    // Initialization code
    __block CAUITransportView *blockSelf = self;//Is this a good idea?
    
    //Wire view upto the audio engine
    [AUDIO_ENGINE addEngineObserver: ^{
        [blockSelf updateTransportControls];
    } key:[NSString stringWithFormat:@"%@,%@",
           NSStringFromClass([self class]),
           @"updateTransportControls"]];
}
 
#pragma mark - Property methods
- (BOOL) isEnabled {
    return enabled;
}
 
- (void) setEnabled:(BOOL) value {
    if (enabled != value) {
        recordButton.enabled = value;
        playPauseButton.enabled = value;
        rewindButton.enabled = value;
    }
}
 
#pragma mark - Action methods
- (IBAction) togglePlayback:(id) sender {
    if (![AUDIO_ENGINE canPlay])
        displayAlertDialog(@"Error", @"Host can't play");
    else {
        [AUDIO_ENGINE togglePlay];
        [self updateTransportControls];
    }
}
 
- (IBAction) toggleRecording:(id) sender {
    if (![AUDIO_ENGINE canRecord])
        displayAlertDialog(@"Error", @"Host can't record");
    else {
        [AUDIO_ENGINE toggleRecord];
        [self updateTransportControls];
    }
}
 
- (IBAction) rewindAction:(id) sender {
    if (![AUDIO_ENGINE canPlay])
        displayAlertDialog(@"Error", @"Host can't rewind");
    else {
        [AUDIO_ENGINE rewind];
        [self updateTransportControls];
    }
}
 
- (void) updateTransportControls {
    if ([AUDIO_ENGINE isRecording])
        recordButton.drawingStyle =recordEnabledButtonStyle;
    else
        recordButton.drawingStyle = recordButtonStyle;
    
    if ([AUDIO_ENGINE isPlaying])
        playPauseButton.drawingStyle =pauseButtonStyle;
    else
        playPauseButton.drawingStyle = playButtonStyle;
    
    recordButton.enabled = [AUDIO_ENGINE canRecord];
    recordButton.userInteractionEnabled = recordButton.enabled;
    recordButton.alpha = recordButton.enabled ? 1 : .25;
    
    playPauseButton.enabled = [AUDIO_ENGINE canPlay];
    playPauseButton.userInteractionEnabled = playPauseButton.enabled;
    playPauseButton.alpha = playPauseButton.enabled ? 1 : .25;
 
    rewindButton.enabled = [AUDIO_ENGINE canRewind];
    rewindButton.userInteractionEnabled = rewindButton.enabled;
    rewindButton.alpha = rewindButton.enabled ? 1 : .25;
        
    [self setNeedsDisplay];
}
 
@end