window with focus, but no titlebar.

FROM : Duncan Campbell
DATE : Wed Jun 21 09:08:57 2006

I am trying to implement my own code-completion, to work in a similar 
manner to XCode, and am having problems making the code-completion 
have focus, and also not titlebar.

With XCode, the NSTableView on the completion window has focus (i.e. 
the scrollbar is dark, you can use the mouse to scroll up and down) - 
however the editing NSTextView ALSO has focus - i.e. the cursor 
continues to remain and blink.

Searching through the forums, it would seem a combination of 
overriding  -(BOOL)canBecomeKeyWindow to always return TRUE, and 
initWithContentRect: to set the NSBorderlessWindowMask should work - 
however it does not:

If I try to use an NSWindow, I can never achieve focus unless I 
physically click on the window.

However, if I use an NSPanel, and set the "Utility Panel" and "Non 
activating Panel" properties, I CAN make it work - however, the 
moment I try to override the windowMask to hide the titlebar it stops 
being able to gain focus.

If all of this makes no sense, try this: open xCode, click in the 
editor window to set focus, then press apple+t to make the font 
dialog come up - notice how you can scroll through the fonts, with 
the mouse but the cursor remains blinking in the textView? This is 
what I am trying to accomplish - but without the titlebar of the font 
window showing.

Any suggestions or ideas greatfully accepted.

Cheers,

Duncan Campbell.