NotifyGrab

[Samuel Thibault]

Hello,

Jasper St. Pierre, on jeu. 23 nov. 2017 14:31:32 -0800, wrote:
> Selecting for XI2 events will disable core input events from being sent to your
> client.

I forgot to mention: I'm not getting these focus events in Compiz even
without selecting for XI2, and selecting for XI2 focus events does not
bring XI_FocusIn/Out events either.

Samuel

> On Thu, Nov 23, 2017 at 8:37 AM, Samuel Thibault <[1]
> samuel.thibault at ens-lyon.org> wrote:
> 
>     Hello,
> 
>     I'm working on making compiz use XI2 to get more fine-grain hold
>     on keypresses.  I'm however getting an issue: I do not always get
>     NotifyGrab FocusIn events from the root window when a client calls
> 
>     XGrabKeyboard (mydisplay, mywindow, True, GrabModeAsync, GrabModeAsync,
>     CurrentTime);
> 
>     , which prevents from properly respecting grabbing.
> 
> 
>     Unfortunately, I didn't manage to reproduce the issue with a simpler X
>     root event listener: runnning
> 
>     XSelectInput(mydisplay, DefaultRootWindow(mydisplay), FocusChangeMask);
> 
>     does properly bring focus out/in NotifyGrab events, but these events
>     don't get to Compiz. I also tried to listen on the window itself with
>     the same result: my simple event listener gets the event, but Compiz
>     does not.
> 
>     Oddly enough, this seems to depend on the application: kvm / virtualbox
>     grabbing have the issue, but vncviewer grabbing doesn't have the issue.
> 
>     Reading [2]https://tronche.com/gui/x/xlib/input/XGrabKeyboard.html tells me
>     that there should always be FocusIn / FocusOut events being generated,
>     so I don't immediately see where to look for in the differences between
>     by simple listener and Compiz.
> 
>     Could there be some undocumented cases where such events are not
>     generated?  Any idea where I could look in the X server to check what is
>     happening?
> 
>     Samuel
>     _______________________________________________
>     [3]xorg-devel at lists.x.org: X.Org development
>     Archives: [4]http://lists.x.org/archives/xorg-devel
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> 
> 
> 
> 
> --
>   Jasper
> 
> References:
> 
> [1] mailto:samuel.thibault at ens-lyon.org
> [2] https://tronche.com/gui/x/xlib/input/XGrabKeyboard.html
> [3] mailto:xorg-devel at lists.x.org
> [4] http://lists.x.org/archives/xorg-devel
> [5] https://lists.x.org/mailman/listinfo/xorg-devel

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-- 
Samuel
 J'ai un gros problème: j'ai cet exercice à rendre demain lundi, mais ma
 TI 89 ne sait pas le faire...
 Est-ce que quelqu'un pourrait m'aider??
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