On Nov 7, 2007 1:38 PM, Greg Parker <email@hidden> wrote:
> On Nov 7, 2007, at 12:55 PM, Jamie Kennea wrote:
> > I believe I have found the main issue I have with Leopard X11 and
> > Spaces. Specifically it would appear that Spaces does not like X11
> > windows to be in the same location of the screen on different Spaces.
> >
> > I can reproduce the following everytime with Xquartz 1.2a7:
> >
> > 1. Create 2 xterm windows.
> > 2. Move the 2nd to another space, but put it in the same location as
> > the first window.
> > 3. The window in the 2nd Space should be selected at this point, go
> > back to the first space and without moving the mouse button, click
> > on the xterm window: Nothing happens.
> >
> > You cannot click on the xterm at any point where the 2 windows
> > overlap (if you transpose the 2 spaces). All events including mouse
> > clicks will go to the currently focused window, regardless of what
> > Space it is on.
>
> This is a good catch. The symptom sounds like the X11 window server
> and the Quartz window server disagree about the window layout. In this
> case, the X11 server thinks both windows are visible and overlapping
> in the same place, while the Quartz window server thinks the window in
> the "other space" is hidden or positioned offscreen or something.
I think this can all be explained quite simply. When windows are
moved or restacked via Spaces or Expose, the X server either never
finds out about it or else doesn't properly adjust its state to
compensate for the move.
> When you click on the "overlap" area, the Quartz window server routes
> the click to one of the windows, which belongs to the X11 server. But
> when the X11 server receives the click, it ignores the window choice
> made by the Quartz server and instead re-routes the click from scratch
> based on its own idea of where the windows are. If the X11 server's
> model is mistaken, it'll send the click to the wrong window.
Exactly.
> This hypothesis predicts that a comparison of position, stacking, and
> visibility of X11's top-level windows won't match the view on screen
> or Quartz Debug's window list. An exercise for some developer playing
> at home: write an X11 program that periodically uses XQueryTree() to
> get the list of the root window's children and prints their states and
> positions. (Or find some existing X11 program to do it.) Run that and
> Quartz Debug, then fire up some xterms and Spaces and see what you can
> find.
I'll leave that to people with more time than myself...
Cheers,
-n8
--
>>>-- Nathaniel Gray -- Caltech Computer Science ------>
>>>-- Mojave Project -- http://mojave.cs.caltech.edu -->
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