Isaque Galdino de Araujo <isaque_at_uol.com.br> writes:
> On Mon, 10 Feb 2003 12:59:12 -0200 Isaque Galdino de Araujo wrote:
>
> > On Fri, 07 Feb 2003 08:26:17 -0500 Dan Espen wrote:
> >
> > > If you're not working from source, you might want to forward this to
> > > the fltk developers.
> > I'll do that. Thank you!
>
> Dan, I've sent to the fltk development people, what you suggested, and this i
> s what they send me back:
>
> --- cut here ---
> isaque at uol dot com dot br wrote:
> > ...
> > An application is supposed to redraw itself when it recieves a
> > ConfigureNotify event. Fvwm is sending the ConfigureNotify, but
> > fltk purposely doesn't redraw itself when it gets that event,
> > it waits for an expose event instead.
> > ...
>
> Actually, I checked the Xlib Programming Manual and the
> documentation on ConfigureNotify seems to indicate that the
> application should only force/perform a redraw for Expose and
> GraphicsExpose events - ConfigureNotify ONLY specifies that the
> window has been resized. From page 75:
>
> The ConfigureNotify branch, in all applications, will calculate
> the values of variables based on the new window size. These
> variable values will then be used to calculate where to draw
> things in the Expose branch the next time an Expose event
> occurs. A ConfigureNotify event is always followed by one or
> more Expose events.
>
> Note the last sentence, which is supported in other sections of
> the same manual...
>
> So either fvwm or X server is at fault for not following the X11
> specification, and given that only fvwm seems to exibit this
> problem, it is likely a fvwm bug.
>
> Setting the redraw() flag but not waiting for an expose could cause
> unnecessary redraws on compliant window managers, so I'm not inclined
> to add this "fix" to FLTK...
>
> --
> ______________________________________________________________________
> Michael Sweet, Easy Software Products mike at easysw dot com
> Printing Software for UNIX http://www.easysw.com
Hmm, I'm bcc'ing Michael since I see he took pains to hide his
email address.
Check out this xfree man page:
http://www.xfree86.org/4.2.0/XResizeWindow.3.html
That indicates that the expose events come from the X server.
BUT, it also says that the expose events are optional.
I don't know what I can do to Fvwm to force the X server to
generate the expose events that fltk wants.
You might call this an X server problem, but I'm not sure they
will accept this as a problem since what the server is doing is
consistent with the man page.
--
Dan Espen E-mail: dane_at_mk.telcordia.com
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Received on Mon Feb 10 2003 - 13:55:09 GMT