[gtk+] button: Clear highlight when a button is removed from a container

[Matthias Clasen <matthiasc src gnome org>]

commit af5ecd77e3f0d7f093a4a311bbf628980875ef36
Author: SÃbastien Granjoux <seb sfo free fr>
Date:   Sat May 26 22:32:07 2012 +0200

    button: Clear highlight when a button is removed from a container
    
    A button is highlighted if the private variable in_button is TRUE.
    This variable is set when the pointer is over the button and cleared when
    it left the button. When a button is hidden while there is the pointer over
    it, GTK generates a leave notification event, in_button is set to FALSE.
    But when a button is removed from a container but not destroyed, it is
    unrealized and loose its window. It cannot receive the leave notification
    event and in_button stay TRUE. So when the button get a new parent it is still
    highlighted.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=676890

 gtk/gtkbutton.c |    5 ++++-
 1 files changed, 4 insertions(+), 1 deletions(-)
---
diff --git a/gtk/gtkbutton.c b/gtk/gtkbutton.c
index 621cd4f..824f498 100644
--- a/gtk/gtkbutton.c
+++ b/gtk/gtkbutton.c
@@ -1461,7 +1461,10 @@ gtk_button_unmap (GtkWidget *widget)
   GtkButtonPrivate *priv = button->priv;
 
   if (priv->event_window)
-    gdk_window_hide (priv->event_window);
+    {
+      gdk_window_hide (priv->event_window);
+      priv->in_button = FALSE;
+    }
 
   GTK_WIDGET_CLASS (gtk_button_parent_class)->unmap (widget);
 }