[gtk+/wip/attachment-rectangle] toolbar: use event window as attachment rectangle

[William Hua <williamhua src gnome org>]

commit 10cd1f5c6d838031283c5e8cc4ddd6be5225d68e
Author: William Hua <william hua canonical com>
Date:   Thu Aug 27 10:55:54 2015 +0100

    toolbar: use event window as attachment rectangle

 gtk/gtktoolbar.c |    7 ++++++-
 1 files changed, 6 insertions(+), 1 deletions(-)
---
diff --git a/gtk/gtktoolbar.c b/gtk/gtktoolbar.c
index 3fcf5fc..d50bd3d 100644
--- a/gtk/gtktoolbar.c
+++ b/gtk/gtktoolbar.c
@@ -2639,6 +2639,8 @@ show_menu (GtkToolbar     *toolbar,
 {
   GtkToolbarPrivate *priv = toolbar->priv;
   GdkAttachmentOptions options;
+  GdkWindow *event_window;
+  GdkRectangle rect;
 
   rebuild_menu (toolbar);
 
@@ -2665,11 +2667,14 @@ show_menu (GtkToolbar     *toolbar,
 
   options |= GDK_ATTACHMENT_ATTACH_OPPOSITE_EDGE;
 
+  event_window = gtk_button_get_event_window (GTK_BUTTON (priv->arrow_button));
+  gdk_window_get_frame_extents (event_window, &rect);
+
   gtk_menu_popup_against (priv->menu,
                           event ? event->device : NULL,
                           NULL,
-                          priv->arrow_button,
                           NULL,
+                          &rect,
                           options,
                           NULL,
                           NULL,