[glade] Fix bug 588844 - query dialog cancels if deleted

[Tristan Van Berkom <tvb src gnome org>]

commit 7f78ea6f641b72a4cfeb56f0e4be956219f4b999
Author: Tristan Van Berkom <tristan van berkom gmail com>
Date:   Mon May 20 21:23:20 2013 +0900

    Fix bug 588844 - query dialog cancels if deleted
    
    Cancel the operation if the window close button is clicked or Escape is pressed.

 gladeui/glade-editor.c |   12 ++++++++++++
 1 files changed, 12 insertions(+), 0 deletions(-)
---
diff --git a/gladeui/glade-editor.c b/gladeui/glade-editor.c
index 6b0e198..25295ea 100644
--- a/gladeui/glade-editor.c
+++ b/gladeui/glade-editor.c
@@ -726,6 +726,15 @@ query_dialog_style_set_cb (GtkWidget *dialog,
   gtk_box_set_spacing (GTK_BOX (action_area), 6);
 }
 
+static gboolean
+query_dialog_delete_event_cb (GtkDialog *dialog,
+                             GdkEvent  *event,
+                             gpointer   user_data)
+{
+  gtk_dialog_response (dialog, GTK_RESPONSE_CANCEL);
+  return TRUE;
+}
+
 gboolean
 glade_editor_query_dialog (GladeWidget *widget)
 {
@@ -769,6 +778,9 @@ glade_editor_query_dialog (GladeWidget *widget)
   g_signal_connect (dialog, "style-set",
                     G_CALLBACK (query_dialog_style_set_cb), NULL);
 
+  g_signal_connect (dialog, "delete-event",
+                    G_CALLBACK (query_dialog_delete_event_cb), NULL);
+
   answer = gtk_dialog_run (GTK_DIALOG (dialog));
 
   /*