[empathy: 1/2] Check if apply button has a top level window before calling gtk_widget_grab_default()

[Guillaume Desmottes <gdesmott src gnome org>]

commit 228251c3b10a22dedd3f3928561f08bbcae040a1
Author: Guillaume Desmottes <guillaume desmottes collabora co uk>
Date:   Wed Dec 1 14:03:31 2010 +0100

    Check if apply button has a top level window before calling gtk_widget_grab_default()
    
    IRC widgets don't have any mandatory argument, so the account is valid before
    the widget has been packed into the accounts dialog. gtk_widget_grab_default()
     can't be called on a widget not having a top level window. (#636203)

 libempathy-gtk/empathy-account-widget.c |   13 +++++++++++--
 1 files changed, 11 insertions(+), 2 deletions(-)
---
diff --git a/libempathy-gtk/empathy-account-widget.c b/libempathy-gtk/empathy-account-widget.c
index 4645040..b6a308a 100644
--- a/libempathy-gtk/empathy-account-widget.c
+++ b/libempathy-gtk/empathy-account-widget.c
@@ -183,8 +183,17 @@ account_widget_set_control_buttons_sensitivity (EmpathyAccountWidget *self,
 
       if (sensitive)
         {
-          gtk_widget_set_can_default (priv->apply_button, TRUE);
-          gtk_widget_grab_default (priv->apply_button);
+          /* We can't grab default if the widget hasn't be packed in a
+           * window */
+          GtkWidget *window;
+
+          window = gtk_widget_get_toplevel (priv->apply_button);
+          if (window != NULL &&
+              gtk_widget_is_toplevel (window))
+            {
+              gtk_widget_set_can_default (priv->apply_button, TRUE);
+              gtk_widget_grab_default (priv->apply_button);
+            }
         }
     }
 }