[cheese] Add touch event handler for selecting effects

[David King <davidk src gnome org>]

commit c4dec268505e2d8dac7fe18ffd8fbc48602be1c5
Author: David King <amigadave amigadave com>
Date:   Mon Jul 1 19:28:59 2013 +0100

    Add touch event handler for selecting effects
    
    Use a ClutterTapAction on each effect to allow either a mouse click or a
    touch tap to select effects. Depend on Clutter 1.13.2 for
    ClutterTapAction. Fixes bug 692745.

 configure.ac           |    2 +-
 src/cheese-window.vala |   15 +++++++--------
 2 files changed, 8 insertions(+), 9 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 06b278e..22fbb09 100644
--- a/configure.ac
+++ b/configure.ac
@@ -70,7 +70,7 @@ GSTREAMER_PLUGINS_BAD_REQUIRED="gstreamer-plugins-bad-1.0 >= $GSTREAMER_PLUGINS_
 CAIRO_REQUIRED="cairo >= 1.10.0"
 PANGOCAIRO_REQUIRED="pangocairo >= 1.28.0"
 LIBRSVG_REQUIRED="librsvg-2.0 >= 2.32.0"
-CLUTTER_REQUIRED="clutter-1.0 >= 1.12.0"
+CLUTTER_REQUIRED="clutter-1.0 >= 1.13.2"
 CLUTTERGTK_REQUIRED="clutter-gtk-1.0 >= 0.91.8"
 CLUTTERGST_REQUIRED="clutter-gst-2.0 >= 1.9.0"
 LIBCANBERRA_REQUIRED="libcanberra-gtk3 >= 0.26"
diff --git a/src/cheese-window.vala b/src/cheese-window.vala
index cf52e4a..9af8650 100644
--- a/src/cheese-window.vala
+++ b/src/cheese-window.vala
@@ -913,12 +913,11 @@ public class Cheese.MainWindow : Gtk.ApplicationWindow
   /**
    * Change the selected effect, as a new one was selected.
    *
-   * @param source unused
-   * @param event unused
-   * @return false, to allow further event processing
+   * @param tap unused
+   * @param source the actor (with associated effect) that was selected
    */
-  public bool on_selected_effect_change (Clutter.Actor source,
-                                         Clutter.ButtonEvent event)
+  public void on_selected_effect_change (Clutter.TapAction tap,
+                                         Clutter.Actor source)
   {
     /* Disable the effects selector after selecting an effect. */
     effects_toggle_button.set_active (false);
@@ -926,7 +925,6 @@ public class Cheese.MainWindow : Gtk.ApplicationWindow
     selected_effect = source.get_data ("effect");
     camera.set_effect (selected_effect);
     settings.set_string ("selected-effect", selected_effect.name);
-    return false;
   }
 
   /**
@@ -1093,11 +1091,12 @@ public class Cheese.MainWindow : Gtk.ApplicationWindow
         texture.keep_aspect_ratio = true;
         box.add_child (texture);
         box.reactive = true;
+        var tap = new Clutter.TapAction ();
+        box.add_action (tap);
+        tap.tap.connect (on_selected_effect_change);
         box.set_data ("effect", effect);
         effect.set_data ("texture", texture);
 
-        box.button_release_event.connect (on_selected_effect_change);
-
         text.text  = effect.name;
         text.color = Clutter.Color.from_string ("white");