[Xcb] sending a custom event

Vincent Torri vtorri at univ-evry.fr
Wed Mar 28 01:32:06 PDT 2007

On Tue, 27 Mar 2007, Jim Crafton wrote:

> Well what I'd like is what I can do in Win32, that is send custom
> events/messages to the event loop running in the current thread, and
> then just respond to these messages. From what you're saying this
> isn't really feasible. So I guess I need to handle this on my own.
> While I understand the reasons for this feature not being there, it's
> absence, IMHO, does make it (programming on X and xcb specifically)
> harder to use. No timers, no easy way to send messages to yourself,
> etc. It would be nice if a lot of this had a default implementation,
> so that app/toolkit developers didn't have to re-implement and worry
> about whether or not they did it correctly.

there are libraries for that. So you can write your own system, or you can 
use a library for that. XCB is just an implementation of the X window 



> Cheers
> Jim
> On 3/27/07, Jamey Sharp <jamey at minilop.net> wrote:
>> On Tue, Mar 27, 2007 at 02:59:27PM -0400, Jim Crafton wrote:
>> > What's the right way to send a custom event to my event loop using
>> > xcb? Any sample code for this? I haven't found much of anything, but
>> > maybe I'm looking in the wrong places.
>> I'm not sure what you're looking for.
>> If you want your event loop to process additional events that aren't X
>> events, which is fairly reasonable, you need to provide your own
>> mechanism for getting those events there. The X event queue is no place
>> for non-X events. :-)
>> You can use the SendEvent request to dispatch a custom ClientMessage
>> event to another client, but you generally shouldn't use that for
>> sending messages to yourself. If you do, you have to wait for the
>> message to get to the server and then come back; plus, you get very
>> little data space to work with.
>> Perhaps you're trying to port code that uses XPutBackEvent? XCB doesn't
>> support that functionality (for very good reasons), though you can
>> emulate it by keeping your own event queue and periodically moving X
>> events from XCB into your queue.
>> Does any of that help?
>> --Jamey
>> Version: GnuPG v1.4.6 (GNU/Linux)
>> iD8DBQFGCXMbp1aplQ4I9mURAknsAJ4qKE9ZNnAvP3wi3OKXFUQA038uCgCfeRbZ
>> 9aSR4ChvPFrJbPNX6O7q4RA=
>> =Ei/J
>> -----END PGP SIGNATURE-----
>> _______________________________________________
>> Xcb mailing list
>> Xcb at lists.freedesktop.org
>> http://lists.freedesktop.org/mailman/listinfo/xcb
> _______________________________________________
> Xcb mailing list
> Xcb at lists.freedesktop.org
> http://lists.freedesktop.org/mailman/listinfo/xcb
> -- 
> Ce message a été vérifié par MailScanner
> pour des virus ou des polluriels et rien de
> suspect n'a été trouvé.
> Message délivré par le serveur de messagerie de l'Université d'Evry.

More information about the Xcb mailing list