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Drain the clutter event queue
When multiple events are generated from a single event (for example, when a motion event generates an enter/leave pair), events accumulate in the clutter event queue if the clutter event source is not running. Add a simple event source that checks clutter_events_pending() and dispatches events as necessary.
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@ -346,6 +346,50 @@ meta_parse_options (int *argc, char ***argv,
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#ifdef WITH_CLUTTER
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/* Metacity is responsible for pulling events off the X queue, so Clutter
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* doesn't need (and shouldn't) run its normal event source which polls
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* the X fd, but we do have to deal with dispatching events that accumulate
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* in the clutter queue. This happens, for example, when clutter generate
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* enter/leave events on mouse motion - several events are queued in the
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* clutter queue but only one dispatched. It could also happen because of
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* explicit calls to clutter_event_put(). We add a very simple custom
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* event loop source which is simply responsible for pulling events off
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* of the queue and dispatching them before we block for new events.
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*/
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static gboolean
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event_prepare (GSource *source,
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gint *timeout_)
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{
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*timeout_ = -1;
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return clutter_events_pending ();
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}
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static gboolean
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event_check (GSource *source)
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{
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return clutter_events_pending ();
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}
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static gboolean
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event_dispatch (GSource *source,
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GSourceFunc callback,
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gpointer user_data)
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{
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ClutterEvent *event = clutter_event_get ();
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if (event)
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clutter_do_event (event);
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return TRUE;
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}
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static GSourceFuncs event_funcs = {
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event_prepare,
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event_check,
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event_dispatch
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};
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static void
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meta_clutter_init (GOptionContext *ctx, int *argc, char ***argv)
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{
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@ -355,6 +399,10 @@ meta_clutter_init (GOptionContext *ctx, int *argc, char ***argv)
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if (CLUTTER_INIT_SUCCESS == clutter_init (argc, argv))
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{
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meta_compositor_can_use_clutter__ = 1;
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GSource *source = g_source_new (&event_funcs, sizeof (GSource));
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g_source_attach (source, NULL);
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g_source_unref (source);
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}
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else
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{
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