Fix: Gtk native dialogs do not repaint when zero-timers are used

The problem was that our glib timers were given too high priority,
effectively starving the Gtk event loop. By assigning our timer source,
G_PRIORITY_DEFAULT_IDLE we ensure that all gtk+ events are handled first,
thus allowing the native dialogs to respond and repaint properly.

Task-number: 258433
Reviewed-by: bhughes

1 files changed, 1 insertions, 0 deletions

diff --git a/src/corelib/kernel/qeventdispatcher_glib.cpp b/src/corelib/kernel/qeventdispatcher_glib.cpp
index 7610631e11..2bbe560cbb 100644
--- a/src/corelib/kernel/qeventdispatcher_glib.cpp
+++ b/src/corelib/kernel/qeventdispatcher_glib.cpp
@@ -263,6 +263,7 @@ QEventDispatcherGlibPrivate::QEventDispatcherGlibPrivate(GMainContext *context)
     (void) new (&timerSource->timerList) QTimerInfoList();
     timerSource->processEventsFlags = QEventLoop::AllEvents;
     g_source_set_can_recurse(&timerSource->source, true);
+    g_source_set_priority(&timerSource->source, G_PRIORITY_DEFAULT_IDLE);
     g_source_attach(&timerSource->source, mainContext);
 }