QuickTime Kit Programming Guide - filibeto.org

C H A P T E R 3
Extending the QTKitPlayer Application
// export
IBOutlet NSView *mExportAccessoryView;
IBOutlet NSPopUpButton *mExportTypePopUpButton;
// movie document
QTMovie *mMovie;
}
The first line defines the MovieDocument class and specifies that it inherits from the NSDocument
class. The first four statements declare the outlets you set up and connected in Interface Builder.
The movieWindow instance variable, for example, points to the NSWindow object while the
movieView instance variable points to the QTMovieView object. The last line declares that the
mMovie instance variable points to the QTMovie object.
3. Define a class method with the following line of code:
+ (id)movieDocumentWithMovie:(QTMovie *)movie;
4. To initialize movies, add this code line:
- (id)initWithMovie:(QTMovie *)movie;
5. For the NSMenu validation protocol, which returns a BOOL value, as it validates the menu items
in your project, add this:
- (BOOL)validateMenuItem:(NSMenuItem *)menuItem;
6. The following line of code, which enables you to set a movie to the QTMovie object using the
setMovie: method, is one of the most common you’ll use in building projects with the QuickTime
Kit framework. Add it:
- (void)setMovie:(QTMovie *)movie;
7. Insert the following block of action method declarations in your MovieDocument.h file:
- (IBAction)doExport:(id)sender; // run the export sheet
- (IBAction)doSetFillColorPanel:(id)sender; // update the fill color
- (IBAction)doSetFillColor:(id)sender;
- (IBAction)doSetPosterTime:(id)sender;
- (IBAction)doShowController:(id)sender;//toggle controller visibility
- (IBAction)doPreserveAspectRatio:(id)sender;// toggle aspect ratio
- (IBAction)doLoop:(id)sender; // toggle looping
- (IBAction)doLoopPalindrome:(id)sender; // toggle palindrome looping
- (IBAction)doClone:(id)sender;
8. To handle NSDocument overrides, add the following lines of code:
- (NSString *)windowNibName;
- (void)windowControllerDidLoadNib:(NSWindowController*)windowController;
- (NSData *)dataRepresentationOfType:(NSString *)docType;
- (BOOL)writeWithBackupToFile:(NSString *)fullDocumentPath ofType:(NSString
*)type saveOperation:(NSSaveOperationType)saveOperation;
- (BOOL)readFromFile:(NSString *)fileName ofType:(NSString *)type;
- (void)printShowingPrintPanel:(BOOL)showPanels;
9. Insert the following method before the @end directive in the file:
Adding Code to the MovieDocument Class Interface 47
2005-11-09 | © 2004, 2005 Apple Computer, Inc. All Rights Reserved.