I spent about an hour and a half trying to figure out how to get the "opacity" sliders to display in my app. It turns out that this line in my app's controller does it:
[[NSColorPanel sharedColorPanel] setShowsAlpha:YES];
I had the same problem (actually it's how I found this site!). There is another way:
This appears to be an application global setting. Not sure which method is preferred...
I'm in your case, but I'm newbie in xcode dev and I don't know how to use these codes... Should I make a custom class for NSColorWell? or is there a place for that? Thanks
You will need to read a tutorial on Xcode for that info. It involves making what is called a Controller. The codes you see are in the Objective-C programming language. Go to CocoaBooks and CocoaTutorials. A good free book is called "Become an Xcoder" - it teaches you both Objective-C and Xcode. Also, the Xcode Documentation contains a tutorial on developing apps in Cocoa. Just open the Xcode help file and choose the Cocoa section of the documentation. You will learn how to make a controller, connect objects to the controller, and have actions performed via the controller. - Pietro Gagliardi http://web.mac.com/pietro10
Does anybody know what the little grey triangle that shows up in the top-right corner of color wells means?
It means the color it's displaying was created in the Device space. Use the Calibrated space to make it go away.
There is a bug with the alpha in 10.4: Changing the color sends colorChanged: to the first responder, but changing the alpha doesn't!
How do I add a NSColorWell to a .nib file? - Pietro Gagliardi http://web.mac.com/pietro10
It's on the buttons and sliders palette, next to the button in the upper left.
NSColorWells do that automatically, I just verified this in IB using Test Interface.
How? No matter what I do, it always displays a tiny box with the color.
OK, I got it to work with the border. How do I do it without the border?
I think you'll have to subclass it.