[gtk+/gtk-2-18] When native window requests button presses request other button related events

[Alexander Larsson <alexl src gnome org>]

commit d86702621917fddc91c1403365de18b07e548f7f
Author: Alexander Larsson <alexl redhat com>
Date:   Wed Jan 20 15:37:16 2010 +0100

    When native window requests button presses request other button related events
    
    We need to do this because otherwise the implicit button grab for this
    (native) window will not deliver the button events not selected for
    by this window. This is a problem because non-native child windows may
    select using a wider event mask, and we can't emulate these events if we
    don't get the native events.
    
    Fixes bug #607508
    (cherry picked from commit 3d9d002bed4ec90505a5a65665f5d6de36ad6f67)

 gdk/gdkwindow.c |    9 ++++++++-
 1 files changed, 8 insertions(+), 1 deletions(-)
---
diff --git a/gdk/gdkwindow.c b/gdk/gdkwindow.c
index 25785c6..4780db4 100644
--- a/gdk/gdkwindow.c
+++ b/gdk/gdkwindow.c
@@ -1206,8 +1206,15 @@ get_native_event_mask (GdkWindowObject *private)
        * important thing, because in X only one client can do
        * so, and we don't want to unexpectedly prevent another
        * client from doing it.
+       *
+       * We also need to do the same if the app selects for button presses
+       * because then we will get implicit grabs for this window, and the
+       * event mask used for that grab is based on the rest of the mask
+       * for the window, but we might need more events than this window
+       * lists due to some non-native child window.
        */
-      if (gdk_window_is_toplevel (private))
+      if (gdk_window_is_toplevel (private) ||
+	  mask & GDK_BUTTON_PRESS_MASK)
 	mask |=
 	  GDK_POINTER_MOTION_MASK |
 	  GDK_BUTTON_PRESS_MASK | GDK_BUTTON_RELEASE_MASK |