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RE: FW: Test77 multiwindow mouse weirdness
- From: "Nick Crabtree" <nickc at scopic dot com>
- To: <cygwin-xfree at cygwin dot com>
- Date: Thu, 13 Feb 2003 08:20:56 -0000
- Subject: RE: FW: Test77 multiwindow mouse weirdness
- Reply-to: cygwin-xfree at cygwin dot com
Harold,
The assumption that the screen origin is 0,0 is one of the things I had
to fix for the multiple monitors patch. In general SM_XSCREEN and
SM_YSCREEN should _always_ be used to discover the origin (or more
generally SM_XVIRTUALSCREEN ...). In most configurations this will
indeed return 0,0 but it should not be assumed that this is the case.
I had also noticed this problem with multiwindow mode on my twin monitor
set-up. If I set my left screen to be the primary then the origin is 0,0
and multiwindow mode stretches across both monitors. If the right screen
is primary then the origin is -1200,0 and mutiwindow mode only works on
the right monitor.
I was going to have a look at this in a few weeks when I should have
some spare time.
Nick
-----Original Message-----
From: cygwin-xfree-owner@cygwin.com
[mailto:cygwin-xfree-owner@cygwin.com] On Behalf Of Harold L Hunt II
Sent: 12 February 2003 22:14
To: cygwin-xfree@cygwin.com
Subject: Re: FW: Test77 multiwindow mouse weirdness
Piers,
Yes, that is strange. I think the problem is that, as you said, the
multiwindow mode is assuming that the screen is based at 0, 0. That
isn't a problem for the non-multiwindow mode, but there was obviously
some sort of oversight in the multiwindow mode that caused this problem
to show up. I may look into it eventually, but if you have any
inclination to peek at the source yourself (it is accessible via cvsweb
and well commented) then I would appreciate it if you could try to
locate the problem for me.
Harold
Harold L Hunt II wrote:
> Here is a message from Piers Haken reporting a problem with
> mutliwindow
> mode. His emails get bounced because Exchange insists on munging his
> email.
>
> Harold
>
> > -----Original Message-----
> > From: Piers Haken
> > Sent: Tuesday, February 11, 2003 11:22 PM
> > To: 'cygwin-xfree@cygwin.com'
> > Subject: Test77 multiwindow mouse weirdness
> >
> >
> > I'm seeing some weirdness with the mouse cursor in Test77's
> multiwindow > mode. >
> > Note: I have my windows taskbar attached to the left-hand edge of
the
> > screen instead of the bottom.
> >
> > Here's how to see what I'm seeing:
> > 1) install test77
> > 2) unlock the taskbar.
> > 3) dock the taskbar to the left-hand side of the screen
> > 4) run 'XWin-Test77 -multiwindow'
> > 5) open an xterm
> > 6) look at the position of the xterm window.
> > 7) now click on the 'Cygwin/XFree86 rl' window so the root is
visible.
> > Notice how the position of the xterm window is different
> > depending on whether or not the root window is shown. When the root
> > window is shown the xterm jumps to the right exactly by the width
of the
> > taskbar.
> >
> > 8) while the root window is on top, move the mouse around.
> > Notice that the mouse cursor occasionally jumps to the
right,
> > again by the same amount as the width of the taskbar.
> >
> > 9) show both the root window AND the xterm, so the multiwindow
xterm
> > with the windows decorations is on top of the root window.
> >
> > Notice that the two versions of the xterm window do not
line up.
> >
> > I know this isn't a very common or very severe bug but it does seem
to
> > indicate an underlying problem in the calculation of the desktop
> > bounding rectangle. Perhaps you're assuming, incorrectly in
general,
> > that the desktop starts at (0,0)?
> >
> > Piers.
> >
>
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