StackOverflow2013

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POFloat an NSView above a window being used by DVDPlayback framework
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copied!<p>I am trying to write a simple DVD player using Mac OS X's <code>DVDPlayback.framework</code>. I can get the DVD to play within a window, but ultimately I want this to run as a full-screen app. </p> <p>I'm having difficulty adding a sub-view to display media controls whilst the DVD is playing (pause / play, progress slider to scroll through the movie, change chapter etc). </p> <p>It seems that if I create a sub-view (<code>NSView</code>) within the window being used by the DVD framework, it always seems to fall behind the DVD content, even if I tell the <code>NSView</code> to be at the top-most level.</p> <p>Here's the simplified code, which just tries to create a white sub-view within a region of the window:</p> <p>(I've tried the code on 10.6 and 10.7 with the same results).</p> <pre><code>const BOOL PLAY_DVD = YES; @interface ControlsView : NSView { } @end @implementation ControlsView - (void)drawRect:(NSRect)rect { [[NSColor whiteColor] set]; NSRectFill(rect); } @end @implementation AppDelegate @synthesize window = _window; - (void)applicationDidFinishLaunching:(NSNotification *)aNotification { NSView *view = self.window.contentView; if (PLAY_DVD) { NSLog(@"%@ Playing DVD video", [self class]); // Register error handler OSStatus err; err = DVDInitialize(); if (err != noErr) { NSLog(@"DVDInitialise failed with error code %d", err); [NSApp terminate:self]; } // Set window to be the main window err = DVDSetVideoWindowID([self.window windowNumber]); // Set the display... CGDirectDisplayID display = (CGDirectDisplayID) [[[[self.window screen] deviceDescription] valueForKey:@"NSScreenNumber"] intValue]; Boolean isSupported; err = DVDSwitchToDisplay(display, &isSupported); // Set video bounds NSRect frame = [self.window frame]; CGRect rect = CGRectMake(0, 0, frame.size.width, frame.size.height); err = DVDSetVideoCGBounds(&rect); FSRef ref; DVDOpenMediaFileWithURL([NSURL URLWithString:@"file:///Path/to/my/TestDVD/VIDEO_TS"]); DVDOpenMediaFile(&ref); DVDPlay(); } // Attempt to add a subview to show the controls... ControlsView *controls = [[ControlsView alloc] initWithFrame:NSMakeRect(20, 20, 100, 50)]; [view addSubview:controls positioned:NSWindowAbove relativeTo:nil]; } @end </code></pre> <p>If <code>PLAY_DVD</code> is <strong><code>NO</code></strong>, the subview is correctly rendered (and I can create other sub-views and show that the ordering is correct). </p> <p>If <code>PLAY_DVD</code> is <strong><code>YES</code></strong>, the media starts playing, but the sub-view is never visible because it always seems to fall behind the video.</p> <p>The only examples of DVD playback I've been able to find have had the controls in a second window, but for a full-screen application I'd like the controls to be part of the full-screen view and to fade in/out when required. </p> <p>Does anyone know how best to do this? Do my full-screen controls have to be in a separate window which floats above the full-screen window? I've not been able to find an example which has the controls and the DVD playback in the same window.</p> <p>Thanks in advance for your help!</p>

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