I'm wondering what the "right" way is to use transparent images in an NSButton (not using Interface Builder as this is a port of a platform independent dialog library, which is also required to work back to 10.5). Transparent images here = PDF loaded as NSImage which do not paint their entire canvas.
These NSButton elements sit in an NSWindow with default background Color. The problems: - sometimes (as yet unclear when but it might have started when we started to set image scaling) the first paint of the image has a white background. - subsequent repaints (e.g. when the button is clicked) repaint on the window's background, i.e. seemingly as required - each subsequent repaint does not clear the background. This results in repeated clicks making the image darker and darker, or if there is an alternate image we are left with the shadow of both. Key definitions - NSButton setImagePosition:NSImageOnly setBordered:no and [[button cell] setImageScaling:NSImageScaleProportionallyUpOrDown] - For a single image, NSButton setImageType:NSMomentaryLightButton - For two image, NSButton setImageType:NSToggleButton or NSMomentaryChangeButton I'm wondering if I need to add code that causes the button area to be erased or repainted in the background colour before it is painted. Or perhaps use a different control/view type altogether (NSImageView?) and mandate non-transparent images where button functionality is actually needed. Thanks in advance. _______________________________________________ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
