Add some optional animation to the reparenting test

1 files changed, 46 insertions, 1 deletions

diff --git a/examples/reparenting-test.c b/examples/reparenting-test.c
index 1263ede..06a3e18 100644
--- a/examples/reparenting-test.c
+++ b/examples/reparenting-test.c
@@ -9,6 +9,10 @@
 #include <clutter/clutter.h>
 #include <clutter-gtk/clutter-gtk.h>
 
+#include <math.h>
+
+static gulong CLUTTER_COS_SQUARED = CLUTTER_ANIMATION_LAST;
+
 static GtkWidget *contents = NULL;
 static GtkWidget *bin1 = NULL;
 static GtkWidget *bin2 = NULL;
@@ -40,13 +44,38 @@ reparent_cb (GtkButton *button, gpointer user_data)
     gtk_widget_reparent (contents, newparent);
 }
 
+static gdouble
+clutter_cos_squared (ClutterAlpha *alpha, gpointer user_data)
+{
+    ClutterTimeline *timeline = clutter_alpha_get_timeline (alpha);
+    gdouble p = clutter_timeline_get_progress (timeline);
+
+    return pow (cos (M_PI * p), 2);
+}
+
+static void
+animate_cb (GtkToggleButton *toggle, ClutterTimeline *timeline)
+{
+    if (gtk_toggle_button_get_active (toggle))
+    {
+        clutter_timeline_start (timeline);
+    }
+    else
+    {
+        clutter_timeline_pause (timeline);
+    }
+}
+
 int
 main (int argc, char **argv)
 {
     gtk_clutter_init (&argc, &argv);
 
+    /* register the alpha func */
+    CLUTTER_COS_SQUARED = clutter_alpha_register_func (clutter_cos_squared, NULL);
+
     GtkWidget *window = gtk_clutter_window_new ();
-    GtkWidget *table = gtk_table_new (2, 2, FALSE);
+    GtkWidget *table = gtk_table_new (2, 3, FALSE);
 
     gtk_container_add (GTK_CONTAINER (window), table);
 
@@ -61,19 +90,35 @@ main (int argc, char **argv)
     GtkWidget *button = gtk_button_new_with_label ("Reparent");
     gtk_table_attach_defaults (GTK_TABLE (table), button, 0, 2, 1, 2);
 
+    GtkWidget *toggle = gtk_toggle_button_new_with_label ("Animate RHS");
+    gtk_table_attach_defaults (GTK_TABLE (table), toggle, 0, 2, 2, 3);
+
     contents = gtk_image_new_from_file ("redhand.png");
     gtk_container_add (GTK_CONTAINER (bin1), contents);
 
+    /* put both sides of the table into a sizegroup to avoid resizing */
     GtkSizeGroup *sizegroup = gtk_size_group_new (GTK_SIZE_GROUP_BOTH);
     gtk_size_group_add_widget (sizegroup, bin1);
     gtk_size_group_add_widget (sizegroup, standin);
 
+    /* add an optional animation to the actor */
+    ClutterAnimation *animation = clutter_actor_animate (actor,
+            CLUTTER_COS_SQUARED, 1200,
+            "opacity", 0x0,
+            NULL);
+    ClutterTimeline *timeline = clutter_animation_get_timeline (animation);
+    clutter_timeline_set_loop (timeline, TRUE);
+    clutter_timeline_stop (timeline);
+
     g_signal_connect_swapped (window, "destroy",
             G_CALLBACK (gtk_main_quit), NULL);
 
     g_signal_connect (button, "clicked",
             G_CALLBACK (reparent_cb), NULL);
 
+    g_signal_connect (toggle, "toggled",
+            G_CALLBACK (animate_cb), timeline);
+
     gtk_widget_show_all (window);
     gtk_main ();
 }