CODEWITHSUNDEEP
objective-ccocoamacosdesktopnswindow
floxxxy
floxxxy

Reputation: 215

NSWindow draw on top of Desktop icons

I'm writing an application that is looking to draw a basic NSWindow on top of the Desktop icons (Mac OSX 10.7 Lion).

NSWindow *systemInfoWindow  = [[NSWindow alloc] initWithContentRect:frame
                                                 styleMask:NSBorderlessWindowMask
                                                   backing:NSBackingStoreBuffered
                                                     defer:NO];
systemInfoWindow.delegate = self;
[systemInfoWindow setCollectionBehavior:NSWindowCollectionBehaviorCanJoinAllSpaces];

[systemInfoWindow setBackgroundColor:backgroundColorSpace];
[systemInfoWindow makeKeyAndOrderFront:NSApp];
[systemInfoWindow setLevel:kCGDesktopIconWindowLevel];

This part of code works quite well and the NSWindow gets draw on top of the icons. But if I switch between two spaces my NSWindow stay behind the icons.

/* === Update === */ I think i have problems with my window Level. For better understanding I have uploaded two Screenshots. Space 1 - window stays like I want on top of the Icons http://dl.dropbox.com/u/1503795/Space1.png

Space 2 - the window is behind the Desktop icons. They should also stay on top http://dl.dropbox.com/u/1503795/Space2.png

A further problem I found. If I activated the App and stay on the first Space and everything looks good like on my first Screenshot. If I select the Files on the Desktop the window also jumps to the back: Sorry, can`t post a nother Screenshot

I hope my problem is a bit more understandably.

I dont`t know how to fix this. Has anybody an idea? Thanks!

Upvotes: 3

Views: 1236

Answers (1)

Rob Keniger
Rob Keniger

Reputation: 46028

You probably need to register for the space change notification:

NSNotificationCenter* nc = [[NSWorkspace sharedWorkspace] notificationCenter];
[nc addObserver:self 
    selector:@selector(activeSpaceDidChange:) 
    name:NSWorkspaceActiveSpaceDidChangeNotification 
    object:nil];

You can then respond to the notification and update your window:

- (void) activeSpaceDidChange:(NSNotification*)aNotification 
{
    [[self window] orderFront:self];
}

Upvotes: 1

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