[Xcb] sending a custom event

[Vincent Torri]

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 
protocol.

regards

Vincent

>
> 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
>> 
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