QuickTime Kit Programming Guide - filibeto.org

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C H A P T E R 6 Adding Multimedia Playback Capability } 4. Define the actions you need before the @end directive in order to show movies in your window and to show the window itself: - (IBAction)doSetMovies:(id)sender; - (IBAction)doShowViewTestsWindow:(id)sender; That’s it. Save your ViewTestsController.h file. Adding Code To Your ViewTestController.m In this next sequence of steps, you’ll be adding a larger chunk of code to your ViewTestsController.m implementation file. To begin, in your QT<strong>Kit</strong>Player project, choose File > New File. In the Assistant window for your new file in Xcode 2.0, select Cocoa > Objective-C class and in the window that opens enter the title ViewTestsController.m . Now follow these steps 1. Insert the following import line at the beginning of your file: #import "ViewTestsController.h" 2. Following your import statement, you want to add this line: @implementation ViewTestsController 3. You want to be notified when the window is closing so you can do a cleanup. Insert these lines of code: -(void)awakeFromNib { [ [NSNotificationCenter defaultCenter] addObserver:self selector:@selector(closeWin:) name:NSWindowWillCloseNotification object:mViewTestsWindow ]; } 4. Add this next block to specify if the movie is playing or not. If the movie is currently playing, it returns YES. If not, it returns NO. -(BOOL)isPlaying:(QTMovie *)aMovie { if ([aMovie rate == 0) { return NO; } return YES: } 5. Next, you need to add code to stop the movie from playing. Add these lines: -(void)stopPlayingMovie:(QTMovie *)aMovie { if ([self isPlaying:aMovie] == YES) { 114 Adding Code To Display and Playback Multimedia 2005-11-09 | © 2004, 2005 Apple Computer, Inc. All Rights Reserved.
C H A P T E R 6 Adding Multimedia Playback Capability } } [aMovie stop]; 6. Insert the following code to handle stopping of any currently playing movies and to clear the movies that were previously set for each view: - (void)closeWin:(void *)userInfo { // stop any currently playing movies [self stopPlayingMovie:[mSplitViewMovieView1 movie]]; [self stopPlayingMovie:[mSplitViewMovieView2 movie]]; [self stopPlayingMovie:[mSplitViewMovieView3 movie]]; [self stopPlayingMovie:[mTabViewMovieView1 movie]]; [self stopPlayingMovie:[mTabViewMovieView2 movie]]; [self stopPlayingMovie:[mScrollViewMovieView movie]]; } // clear the movies that were previously set for each view [mSplitViewMovieView1 setMovie:NULL]; [mSplitViewMovieView2 setMovie:NULL]; [mSplitViewMovieView3 setMovie:NULL]; [mTabViewMovieView1 setMovie:NULL]; [mTabViewMovieView2 setMovie:NULL]; [mScrollViewMovieView setMovie:NULL]; 7. To get the movies you want to play and open the panel so the user can choose, insert this chunk of code: - (QTMovie *)getAMovieFile { NSOpenPanel *openPanel; openPanel = [NSOpenPanel openPanel]; [openPanel setCanChooseDirectories:NO]; if ([openPanel runModalForTypes:[QTMovie movieUnfilteredFileTypes]] == NSOKButton) { return [QTMovie movieWithFile:[openPanel filename] error:NULL]; } return nil; 8. To set the movies, add this chunk of code: - (IBAction)doSetMovies:(id)sender // set the movies [mSplitViewMovieView1 setMovie:[self getAMovieFile]]; [mSplitViewMovieView2 setMovie:[self getAMovieFile]]; [mSplitViewMovieView3 setMovie:[self getAMovieFile]]; [mTabViewMovieView1 setMovie:[self getAMovieFile]]; [mTabViewMovieView2 setMovie:[self getAMovieFile]]; [mScrollViewMovieView setMovie:[self getAMovieFile]]; } 9. To add a toolbar and to show the window, add the following code: Adding Code To Display and Playback Multimedia 115 2005-11-09 | © 2004, 2005 Apple Computer, Inc. All Rights Reserved.
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QuickTime Kit Programming Guide 200
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Contents Introduction Introduction
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Figures and Tables Chapter 1 The Qu
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F I G U R E S A N D T A B L E S Fig
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I N T R O D U C T I O N Introductio
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C H A P T E R 1 The QuickTime Kit A
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C H A P T E R 2 Building a Simple Q
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C H A P T E R 3 Extending the QTKit
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C H A P T E R 4 Adding New Capabili
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