cookbook: Example of simple movement animation

Added example showing how to move an actor in one of the
three axes (x,y,z) in response to a button event on the
actor.

doc/cookbook/examples/Makefile.am

@@ -4,6 +4,7 @@ NULL =
 
 noinst_PROGRAMS = \
 	animations-complex	\
+	animations-moving-implicit	\
 	animations-reuse	\
 	animations-rotating	\
 	text-shadow		\
@@ -49,6 +50,7 @@ AM_CFLAGS = \
 AM_LDFLAGS = $(CLUTTER_LIBS) -export-dynamic
 
 animations_complex_SOURCES                 = animations-complex.c
+animations_moving_implicit_SOURCES         = animations-moving-implicit.c
 animations_reuse_SOURCES                   = animations-reuse.c
 animations_rotating_SOURCES                = animations-rotating.c
 text_shadow_SOURCES                        = text-shadow.c

doc/cookbook/examples/animations-moving-implicit.c

@@ -0,0 +1,93 @@
+#include <stdlib.h>
+#include <clutter/clutter.h>
+
+typedef struct
+{
+  gchar *axis;
+  gfloat target;
+} AnimationSpec;
+
+static const ClutterColor stage_color = { 0x33, 0x33, 0x55, 0xff };
+static const ClutterColor red = { 0xff, 0x00, 0x00, 0xff };
+static const ClutterColor green = { 0x00, 0xff, 0x00, 0xff };
+static const ClutterColor blue = { 0x00, 0x00, 0xff, 0xff };
+
+static gboolean
+button_pressed_cb (ClutterActor *actor,
+                   ClutterEvent *event,
+                   gpointer      user_data)
+{
+  if (clutter_actor_get_animation (actor) != NULL)
+    return TRUE;
+
+  AnimationSpec *animation_spec = (AnimationSpec *) user_data;
+
+  clutter_actor_animate (actor, CLUTTER_LINEAR, 500,
+                         animation_spec->axis, animation_spec->target,
+                         NULL);
+
+  return TRUE;
+}
+
+int
+main (int   argc,
+      char *argv[])
+{
+  ClutterActor *stage;
+  ClutterActor *rectangle1;
+  ClutterActor *rectangle2;
+  ClutterActor *rectangle3;
+
+  AnimationSpec x_move = { "x", 50.0 };
+  AnimationSpec y_move = { "y", 400.0 };
+  AnimationSpec z_move = { "depth", -1000.0 };
+
+  clutter_init (&argc, &argv);
+
+  stage = clutter_stage_get_default ();
+  clutter_actor_set_size (stage, 500, 500);
+  clutter_stage_set_color (CLUTTER_STAGE (stage), &stage_color);
+  g_signal_connect (stage, "destroy", G_CALLBACK (clutter_main_quit), NULL);
+
+  rectangle1 = clutter_rectangle_new_with_color (&red);
+  clutter_actor_set_reactive (rectangle1, TRUE);
+  clutter_actor_set_size (rectangle1, 50, 50);
+  clutter_actor_set_position (rectangle1, 400, 400);
+
+  rectangle2 = clutter_rectangle_new_with_color (&green);
+  clutter_actor_set_reactive (rectangle2, TRUE);
+  clutter_actor_set_size (rectangle2, 50, 50);
+  clutter_actor_set_position (rectangle2, 50, 50);
+
+  rectangle3 = clutter_rectangle_new_with_color (&blue);
+  clutter_actor_set_reactive (rectangle3, TRUE);
+  clutter_actor_set_size (rectangle3, 50, 50);
+  clutter_actor_set_position (rectangle3, 225, 225);
+
+  g_signal_connect (rectangle1,
+                    "button-press-event",
+                    G_CALLBACK (button_pressed_cb),
+                    &x_move);
+
+  g_signal_connect (rectangle2,
+                    "button-press-event",
+                    G_CALLBACK (button_pressed_cb),
+                    &y_move);
+
+  g_signal_connect (rectangle3,
+                    "button-press-event",
+                    G_CALLBACK (button_pressed_cb),
+                    &z_move);
+
+  clutter_container_add (CLUTTER_CONTAINER (stage),
+                         rectangle1,
+                         rectangle2,
+                         rectangle3,
+                         NULL);
+
+  clutter_actor_show (stage);
+
+  clutter_main ();
+
+  return EXIT_SUCCESS;
+}