Re: GWorkspace: focus change between any.app and Gworksapce/Desktop causes weird flickering

[Enrico Sersale]

On 2005-03-20 23:38:00 +0200 Armando Di Cianno <fafhrd@gentoo.org> wrote:

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> GWorkspace: focus change between any.app and Gworksapce/Desktop causes
> weird flickering
>
> I thought someone mentioned this, but I couldn't find the previous
> email to respond to, properly.
>
> Anyways, switching between, for e.g., GNUMail.app and Terminal.app
> does not make this happen, but clicking on the "Desktop" (Desktop
> feature turned on) causes, what seems, to be all underlying windows
> breifly appearing, and then a screen "flash".  What is odd, is that I
> cannot reliably recreate this bug when I have 1 GWorkspace browser
> window open as well, although it happens "sometimes."
>
> Has any one else seen this?  Any work-arounds?  (Honestly, I'd
> appreciate it -- the flashing is giving me a headache).

The borderless window containing the desktop view must become the main window 
when you click on it. But, beeing it at NSDesktopWindowLevel, this works only 
with this hack: the -mouseDown: method of the view sends a -makeKeyWindow to 
its window; doing this, the window become the first responder but it is also 
ordered in front of the other windows; to avoid this, the window's 
-orderWindow:relativeTo: method has these two lines:

  [super orderWindow: place relativeTo: otherWin];  // let the window get the 
events
  [self setLevel: NSDesktopWindowLevel];            // put it again at its level

And here you see the flicker.

I think that this problem should be fixed (in -back, probably) treating 
differently from the other cases the case of a window at NSDesktopWindowLevel 
that must become the main window.