Mac Forum / Programming / Mac Programming / January 2006

There really isn't that much to it. To hide the menu bar and the dock, you
can call SetSystemUIMode(kUIModeAllHidden, 0), then set the frame of a
borderless window to fill the screen. To get back out,
SetSystemUIMode(kUIModeNormal, 0) and close the window.

Here's some code from QTAmateur's fullscreen method. Here, 'movieView' is
the movie view in the regular document window with a title bar, and
fullscreenWindow is a subclassed borderless window which accepts first
responder (so I can still pause the movie with the space bar and things
like that).

- (void)beginFullscreen
{
    if(inFullscreen) return;
   
    NSWindow *window = [movieView window];
    NSScreen *screen = [window screen];
   
    [window orderOut:self];
    [movieView setMovie:nil];
   
    [fullscreenWindow setFrame:[screen frame] display:YES];
    [fullscreenMovieView setMovie:movie];
    [fullscreenWindow makeKeyAndOrderFront:self];
   
    if([screen isEqual:[NSScreen mainScreen]])
        SetSystemUIMode(kUIModeAllHidden, 0);
   
    [fullscreenMovieView play:self];
   
    [self disableSleep];
   
    inFullscreen = YES;
}

And for completeness, the endFullscreen method:

- (void)endFullscreen
{
    if(!inFullscreen) return;
   
    SetSystemUIMode(kUIModeNormal, 0);
    [fullscreenMovieView pause:self];
    [fullscreenWindow orderOut:self];
    [fullscreenMovieView setMovie:nil];
   
    [movieView setMovie:movie];
    [movieView setControllerVisible:YES];
    [[movieView window] makeKeyAndOrderFront:self];
   
    [self enableSleep];
   
    inFullscreen = NO;
}