On 27/08/2010, at 10:18 PM, Erik Colson wrote: > Hi, > > What would be the best way to create a button with a partially transparent > image on a nsview that would only respond to mouse clicks that are on the > non-transparent part of the image ?
This NSImage method is the only one built-in that offers this kind of hit-test functionality (10.6 only). You could build your button around it. But for earlier OS versions you have to do the hit-test yourself. This involves testing the point against the alpha channel value of the image at that point. - (BOOL)hitTestRect:(NSRect)testRectDestSpacewithImageDestinationRect:(NSRect)imageRectDestSpacecontext:(NSGraphicsContext*)referenceContexthints:(NSDictionary *)hintsflipped:(BOOL)flipped --Graham_______________________________________________ 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: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
