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macOS Make Window background semi transparent

S

SRossi

macrumors regular
Original poster
May 27, 2009
202
0
Glasgow, Scotland
Hi all again, I'm trying to change the transparency of the background of a Window. This will be done on a click of a button which is placed on the window.

Heres my code so far:

Code: 
- (IBAction)changeOpacity:(id)sender
{
	NSWindow *aWindow;
	
	[aWindow setOpaque:NO];
	NSColor *semiTransparentBlue = [NSColor colorWithDeviceRed:0.0 green:0.0 blue:1.0 alpha:0.5];
	[aWindow setBackgroundColor:semiTransparentBlue];
}

PS I dont know how to set the current window to aWindow help with that would be good as well :)

Thanks all in advance

Stephen
 
S

SRossi

macrumors regular
Original poster
May 27, 2009
202
0
Glasgow, Scotland
Got it working my mistake, but can i ask how would I make the background change when the user moves a slider ?

Can I bind the value of the slider to the background of the window?

Stephen
 
K

kainjow

Moderator emeritus
Jun 15, 2000
7,958
7
You can observe for changes to that value in your controller, and then set the background color. See addObserver:forKeyPath:eek:ptions:context:
 
S

SRossi

macrumors regular
Original poster
May 27, 2009
202
0
Glasgow, Scotland
Right I created a binding in IB from a slider to a float i created but when i move the slider it creates all kind of funny numbers.

Should I create the binding programatically as kainjow says, if so is there any sample code that I could use?

Thanks.

Stephen
 
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