[cheese] ui: handle "delete-event" signal at Preferences dialog, fixes bug #647229

[Luciana Fujii Pontello <lufujii src gnome org>]

commit 9c27753176e931908b894b6b3707a8588f9c1de5
Author: Rodrigo Duarte Sousa <rodrigodsousa gmail com>
Date:   Sun Apr 10 14:17:04 2011 -0300

    ui: handle "delete-event" signal at Preferences dialog, fixes bug #647229
    
    the "close" event triggered by the escape key was destroyng the dialog, so
    when the user tried to open the Preferences dialog again what appeared was
    an empty/tiny window. Handle the "delete-event" connecting it with hide_on_delete()
    solved the problem.

 data/cheese-prefs.ui        |    1 +
 src/cheese-preferences.vala |    6 ++++++
 2 files changed, 7 insertions(+), 0 deletions(-)
---
diff --git a/data/cheese-prefs.ui b/data/cheese-prefs.ui
index 7b68831..90e43f6 100644
--- a/data/cheese-prefs.ui
+++ b/data/cheese-prefs.ui
@@ -49,6 +49,7 @@
     <property name="title" translatable="yes">Preferences</property>
     <property name="window_position">center-on-parent</property>
     <property name="type_hint">dialog</property>
+    <signal name="delete-event" handler="cheese_preferences_dialog_on_delete" swapped="no"/>
     <child internal-child="vbox">
       <object class="GtkVBox" id="dialog-vbox1">
         <property name="visible">True</property>
diff --git a/src/cheese-preferences.vala b/src/cheese-preferences.vala
index eb0a925..3c18f41 100644
--- a/src/cheese-preferences.vala
+++ b/src/cheese-preferences.vala
@@ -256,6 +256,12 @@ public class Cheese.PreferencesDialog : GLib.Object
   }
 
   [CCode (instance_pos = -1)]
+  public void on_delete (Gtk.Dialog dialog)
+  {
+    dialog.hide_on_delete ();
+  }
+
+  [CCode (instance_pos = -1)]
   public void on_dialog_close (Gtk.Button button)
   {
     this.dialog.hide ();