/*

     File: ExportProgressWindowController.m

 Abstract: A window controller to manage the export progress window.

  Version: 1.0

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 */

#import "ExportProgressWindowController.h"

#import <AVFoundation/AVFoundation.h>

@interface ExportProgressWindowController ()

@property float progress;

@end

@implementation ExportProgressWindowController

{

    AVAssetExportSession *_exportSession;

    NSTimer *_updateTimer;

}

- (void)dealloc

{

    [_updateTimer invalidate];

}

- (IBAction)cancelExport:(id)sender

{

    if (self.delegate && [self.delegate respondsToSelector:@selector(exportProgressWindowControllerDidCancel:)])

        [self.delegate exportProgressWindowControllerDidCancel:self];

    [_updateTimer invalidate];

    _updateTimer = nil;

}

- (AVAssetExportSession *)exportSession

{

    return _exportSession;

}

- (void)setExportSession:(AVAssetExportSession *)exportSession

{

    _exportSession = exportSession;

    _updateTimer = [NSTimer scheduledTimerWithTimeInterval:0.1 target:self selector:@selector(updateProgress) userInfo:nil repeats:YES];

}

- (BOOL)isIndeterminate

{

    return (self.progress == 0.f);

}

+ (NSSet *)keyPathsForValuesAffectingIsIndeterminate

{

    return [NSSet setWithObject:@"progress"];

}

- (void)updateProgress

{

    self.progress = self.exportSession.progress;

}

@end