On 01/02/2012, at 7:59 AM, Marshall Houskeeper wrote:
> I would like to create a transparent window that spans all the screens and
> that handles mouse down events. Below is the code that I use to create my
> transparent window. The transparent window gets created and display
> successfully. However, mouse down events are not directed to the window. I
> can see where this feature is desirable. For example making a round window.
> However, not in my case.
>
> Is there a way that I can setup a transparent window to receive mouse down
> events?
>
> Note: I have found that if I set the window's background color alpha value to
> 0.05 or greater I will receive mouse down events. However this little
> amount of alpha causes some color shift in the background image.
>
> - (id)init
> {
> NSRect rect = [[NSScreen mainScreen] frame];
>
> // get the union of all the screens
> for (NSScreen* s in [NSScreen screens])
> {
> rect = NSUnionRect(rect,[s frame]);
> }
>
> self = [super initWithContentRect:rect styleMask:NSBorderlessWindowMask
> backing:NSBackingStoreRetained defer:YES];
>
> if (self)
> {
> [self setBackgroundColor:[NSColor clearColor]];
> [self setOpaque:NO];
> }
>
> return self;
> }
>
Hi,
NSWindow has:
setIgnoresMouseEvents:
Specifies whether the window is transparent to mouse clicks and other mouse
events, allowing overlay windows.
- (void)setIgnoresMouseEvents:(BOOL)ignoreMouseEvents
Parameters
ignoreMouseEvents
If YES, the window will ignore mouse events; if NO, it will not.
Availability
• Available in Mac OS X v10.2 and later.
Ron
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