Re: new hint for EWMH

On Mon, 6 Aug 2007 15:36:07 +0200 Lubos Lunak <[email protected]> babbled:

> On Friday 03 of August 2007, Tapani Pälli wrote:
> > ext Lubos Lunak wrote:
> > > On Monday 30 of July 2007, Tapani Pälli wrote:
> > >> Hello,
> > >> I would like to suggest a new hint '_NET_INPUT_AREAS' for EWMH to be
> > >> used by window managers and toolkits. This hint would be a list of
> > >> rectangles representing bounding boxes of the input methods on the
> > >> screen. This allows a toolkit to place it's temporary windows (that
> > >> might have input-entries) like popup-menu's so that they won't cover
> > >> input-method areas and user can interact with those windows.
> > >>
> > >> I have suggested to have this patch for Matchbox window manager :
> > >> http://bugzilla.openedhand.com/show_bug.cgi?id=333
> > >
> > >  I'm not sure I understand the purpose of the hint correctly - why not
> > > simply add a new window type for these windows? Could you post a
> > > description for the hint as it should be included in the spec?
> >
> > New Window type is fine for WM but a list of rectangles is much better
> > toolkit-wise. Without this hint toolkit would need to go through whole
> > window tree and pick input-method windows and then make collision
> > detection logic. This is much heavier that having coordinates from the
> > start.
> 
>  I see, I guess that makes sense. However that's only some kind of 
> optimization, I think a window type is still needed to find out which windows 
> create the regions. That's from somebody who has no clue about input methods 
> though - from your suggested description I wouldn't have any idea how to 
> actually implement the support.

technically speaking - there already is a netwm property that lists all windows
(_NET_CLIENT_LIST) so all you need to do is:

1. get this
2. get geometry/attributes and window type property for each of these
3. if window type is appropriate - it works like your rect property.

yes - this is more round-trips, but it feels cleaner to me.

> -- 
> Lubos Lunak
> KDE developer
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The Rasterman (Carsten Haitzler)    [email protected]
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