[gtk+] Resume events when disconnecting from a frame clock

[Matthias Clasen <matthiasc src gnome org>]

commit ff256956b2072cd422ccec5f33949854b0db0ef8
Author: Tom Hughes <tom compton nu>
Date:   Mon Jan 26 21:52:00 2015 +0000

    Resume events when disconnecting from a frame clock
    
    If we are disconnecting from a frame clock that has paused event
    processing and hasn't issued a resume yet make sure we resume the
    events or they will stay blocked forever.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=742636

 gdk/gdkinternals.h |    1 +
 gdk/gdkwindow.c    |    9 +++++++++
 2 files changed, 10 insertions(+), 0 deletions(-)
---
diff --git a/gdk/gdkinternals.h b/gdk/gdkinternals.h
index cbb87e4..d1d1e4d 100644
--- a/gdk/gdkinternals.h
+++ b/gdk/gdkinternals.h
@@ -333,6 +333,7 @@ struct _GdkWindow
   guint in_update : 1;
   guint geometry_dirty : 1;
   guint event_compression : 1;
+  guint frame_clock_events_paused : 1;
 
   /* The GdkWindow that has the impl, ref:ed if another window.
    * This ref is required to keep the wrapper of the impl window alive
diff --git a/gdk/gdkwindow.c b/gdk/gdkwindow.c
index 778fd5f..a12a43e 100644
--- a/gdk/gdkwindow.c
+++ b/gdk/gdkwindow.c
@@ -10913,6 +10913,8 @@ gdk_window_flush_events (GdkFrameClock *clock,
   _gdk_display_pause_events (display);
 
   gdk_frame_clock_request_phase (clock, GDK_FRAME_CLOCK_PHASE_RESUME_EVENTS);
+
+  window->frame_clock_events_paused = TRUE;
 }
 
 static void
@@ -10939,6 +10941,8 @@ gdk_window_resume_events (GdkFrameClock *clock,
 
   display = gdk_window_get_display (window);
   _gdk_display_unpause_events (display);
+
+  window->frame_clock_events_paused = TRUE;
 }
 
 static void
@@ -10971,6 +10975,11 @@ gdk_window_set_frame_clock (GdkWindow     *window,
 
   if (window->frame_clock)
     {
+      if (window->frame_clock_events_paused)
+        {
+          gdk_window_resume_events (window->frame_clock, G_OBJECT (window));
+        }
+
       g_signal_handlers_disconnect_by_func (G_OBJECT (window->frame_clock),
                                             G_CALLBACK (gdk_window_flush_events),
                                             window);