Re: Drawing in a view with alpha 1.0 shows windows behind
Eyal, I don’t have an answer for you, just a request for clarification. If a view has a low alpha setting, you expect the content behind it to show through, so your description sounds like normal behavior. However, I suspect you’re dealing with a real problem. Are you saying that your view with low alpha is above other content in your app, but instead of the information which *should* show through, Yosemite is blending with other content—content from windows or the desktop behind your app? -- Charles On March 31, 2015 at 08:59:48, Charles Jenkins (cejw...@gmail.com) wrote: Eyal, I don’t have an answer for you, just a request for clarification. If a view has a low alpha setting, you expect the content behind it to show through, so your description sounds like normal behavior. However, I suspect you’re dealing with a real problem. Are you saying that your view with low alpha is above other content in your app, but instead of the information which *should* show through, Yosemite is blending with other content—content from windows or the desktop behind your app? -- Charles On March 31, 2015 at 08:42:30, Eyal Redler (eyred...@netvision.net.il) wrote: Hi, I'm working on a custom view. I'm using the following code to draw the view [[NSColor colorWithDeviceRed:(float)42/255 green:(float)49/255 blue:(float)58/255 alpha:0.5] set]; NSRectFill([self bounds]); [[NSColor colorWithDeviceRed:(float)242/255 green:(float)110/255 blue:(float)80/255 alpha:1.0] set]; NSFrameRect([self bounds]); For some reason the view is showing through the windows/desktop behind the window where my view is located. Surly this is a manifestation of one of the (somewhat unwanted IMO) features of Yosemite but I've not been able to find where I can opt out of this. The window I'm drawing to is a custom window, if that matters TIA Eyal ___ 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/cejwork%40gmail.com This email sent to cejw...@gmail.com ___ 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
Re: Drawing in a view with alpha 1.0 shows windows behind
Whoops. Sorry to everyone about the doubled-up email. I had a problem with my email program and thought the first reply didn’t send, so I tried again, and apparently it went out as a reply to my own reply :-( -- Charles ___ 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
Re: Drawing in a view with alpha 1.0 shows windows behind
On 31 Mar 2015, at 15:59, Charles Jenkins cejw...@gmail.com wrote: I confused the view with the color, but in essence that’s what I was afraid you were saying: that Yosemite is blending with unrelated content instead of what is layered by your app/view/window/whatever “under” the rectangle you’re trying to fill. I believe you should file a bug report on this. Nope, this is the intended design. The standard drawing model for Cocoa on OS X is that views draw into a single context for the whole window. Normally then views draw their content *atop* any existing content, so as to build up the correct result. e.g. you composite a translucent colour *over* the existing graphics there. By using NSRectFill you are instead *replacing* whatever is there with your translucent colour. Consequently, whatever is behind the window is now free to appear through that translucency. As Uli said, you want to use a different compositing operation, to give the correct result. ___ 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
Re: Drawing in a view with alpha 1.0 shows windows behind
On Mar 31, 2015, at 5:39 AM, Eyal Redler eyred...@netvision.net.il wrote: For some reason the view is showing through the windows/desktop behind the window where my view is located. Surly this is a manifestation of one of the (somewhat unwanted IMO) features of Yosemite Nope, it’s always been that way. I remember running into this effect back in 2001 or 2002. —Jens ___ 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
Re: Drawing in a view with alpha 1.0 shows windows behind
On 31 Mar 2015, at 14:39, Eyal Redler eyred...@netvision.net.il wrote: I'm working on a custom view. I'm using the following code to draw the view [[NSColor colorWithDeviceRed:(float)42/255 green:(float)49/255 blue:(float)58/255 alpha:0.5] set]; NSRectFill([self bounds]); [[NSColor colorWithDeviceRed:(float)242/255 green:(float)110/255 blue:(float)80/255 alpha:1.0] set]; NSFrameRect([self bounds]); NSRectFill uses the context's default compositing operation, which usually is NSCompositeCopy. You probably want to use NSRectFillUsingOperation( box, NSCompositeSourceAbove ) or so. (this is from memory, it might be a different compositing mode, but it's definitely not Copy) ___ 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
Re: Drawing in a view with alpha 1.0 shows windows behind
I confused the view with the color, but in essence that’s what I was afraid you were saying: that Yosemite is blending with unrelated content instead of what is layered by your app/view/window/whatever “under” the rectangle you’re trying to fill. I believe you should file a bug report on this. -- Charles On March 31, 2015 at 10:33:04, Eyal Redler (e...@beamr.com) wrote: First, I'm not setting the alpha for the view, I'm setting a color with 0.5 alpha and using that to fill the view (code is from drawRect). Second, and more importantly, my problem is not that content is showing through the view (that is the purpose), the problem is that what's showing through is not the right content: I'm seeing other windows and the desktop insetad of seeing what's painted on the superview, the superview's superview etc. To clarify, one of my view's superviews is painted opaque below that view so it's not a case where we have transparency all the way down to the window. Eyal On Mar 31, 2015, at 4:01 PM, Charles Jenkins cejw...@gmail.com wrote: Eyal, I don’t have an answer for you, just a request for clarification. If a view has a low alpha setting, you expect the content behind it to show through, so your description sounds like normal behavior. However, I suspect you’re dealing with a real problem. Are you saying that your view with low alpha is above other content in your app, but instead of the information which *should* show through, Yosemite is blending with other content—content from windows or the desktop behind your app? -- Charles On March 31, 2015 at 08:42:30, Eyal Redler (eyred...@netvision.net.il) wrote: Hi, I'm working on a custom view. I'm using the following code to draw the view [[NSColor colorWithDeviceRed:(float)42/255 green:(float)49/255 blue:(float)58/255 alpha:0.5] set]; NSRectFill([self bounds]); [[NSColor colorWithDeviceRed:(float)242/255 green:(float)110/255 blue:(float)80/255 alpha:1.0] set]; NSFrameRect([self bounds]); For some reason the view is showing through the windows/desktop behind the window where my view is located. Surly this is a manifestation of one of the (somewhat unwanted IMO) features of Yosemite but I've not been able to find where I can opt out of this. The window I'm drawing to is a custom window, if that matters TIA Eyal ___ 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/cejwork%40gmail.com This email sent to cejw...@gmail.com ___ 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/eyredler%40netvision.net.il This email sent to eyred...@netvision.net.il ___ 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
Re: Drawing in a view with alpha 1.0 shows windows behind
Thanks Uli, Using NSRectFillUsingOperation( box, NSCompositeSourceAtop ) did the trick. Thanks to all who answered. I've been developing for mac for over 20 years and I find it really odd that I've never came across this behaviour. Eyal On Mar 31, 2015, at 4:42 PM, Uli Kusterer witness.of.teacht...@gmx.net wrote: On 31 Mar 2015, at 14:39, Eyal Redler eyred...@netvision.net.il wrote: I'm working on a custom view. I'm using the following code to draw the view [[NSColor colorWithDeviceRed:(float)42/255 green:(float)49/255 blue:(float)58/255 alpha:0.5] set]; NSRectFill([self bounds]); [[NSColor colorWithDeviceRed:(float)242/255 green:(float)110/255 blue:(float)80/255 alpha:1.0] set]; NSFrameRect([self bounds]); NSRectFill uses the context's default compositing operation, which usually is NSCompositeCopy. You probably want to use NSRectFillUsingOperation( box, NSCompositeSourceAbove ) or so. (this is from memory, it might be a different compositing mode, but it's definitely not Copy) smime.p7s Description: S/MIME cryptographic signature ___ 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
Re: Drawing in a view with alpha 1.0 shows windows behind
It also depends on your window’s transparency settings, which you don’t always control - Apple changed that on the window that holds the toolbar accessory in fullscreen, changing my patterned grab zone into a bunch of tiny ungrabbable holes :( On Mar 31, 2015, at 2:53 PM, Eyal Redler eyred...@netvision.net.il wrote: Thanks Uli, Using NSRectFillUsingOperation( box, NSCompositeSourceAtop ) did the trick. Thanks to all who answered. I've been developing for mac for over 20 years and I find it really odd that I've never came across this behaviour. Eyal On Mar 31, 2015, at 4:42 PM, Uli Kusterer witness.of.teacht...@gmx.net wrote: On 31 Mar 2015, at 14:39, Eyal Redler eyred...@netvision.net.il wrote: I'm working on a custom view. I'm using the following code to draw the view [[NSColor colorWithDeviceRed:(float)42/255 green:(float)49/255 blue:(float)58/255 alpha:0.5] set]; NSRectFill([self bounds]); [[NSColor colorWithDeviceRed:(float)242/255 green:(float)110/255 blue:(float)80/255 alpha:1.0] set]; NSFrameRect([self bounds]); NSRectFill uses the context's default compositing operation, which usually is NSCompositeCopy. You probably want to use NSRectFillUsingOperation( box, NSCompositeSourceAbove ) or so. (this is from memory, it might be a different compositing mode, but it's definitely not Copy) ___ 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/lrucker%40vmware.com This email sent to lruc...@vmware.com ___ 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
