mutter/doc/cookbook/examples/animations-looping-state.c

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#include <stdlib.h>
#include <clutter/clutter.h>
static const ClutterColor stage_color = { 0x33, 0x33, 0x55, 0xff };
static const ClutterColor red_color = { 0xff, 0x00, 0x00, 0xff };
static void
next_state (ClutterState *transitions,
gpointer user_data)
{
const gchar *state = clutter_state_get_state (transitions);
if (g_strcmp0 (state, "right") == 0)
clutter_state_set_state (transitions, "left");
else
clutter_state_set_state (transitions, "right");
}
static gboolean
key_pressed_cb (ClutterActor *actor,
ClutterEvent *event,
gpointer user_data)
{
ClutterState *transitions = CLUTTER_STATE (user_data);
if (!clutter_timeline_is_playing (clutter_state_get_timeline (transitions)))
next_state (transitions, NULL);
return TRUE;
}
int
main (int argc,
char *argv[])
{
ClutterActor *stage;
ClutterActor *actor;
ClutterState *transitions;
clutter_init (&argc, &argv);
stage = clutter_stage_get_default ();
clutter_actor_set_size (stage, 300, 200);
clutter_stage_set_color (CLUTTER_STAGE (stage), &stage_color);
g_signal_connect (stage, "destroy", G_CALLBACK (clutter_main_quit), NULL);
actor = clutter_rectangle_new_with_color (&red_color);
clutter_actor_set_position (actor, 150, 50);
clutter_actor_set_size (actor, 100, 100);
transitions = clutter_state_new ();
clutter_state_set_duration (transitions, NULL, NULL, 1000);
clutter_state_set (transitions, NULL, "right",
actor, "x", CLUTTER_LINEAR, 150.0,
NULL);
clutter_state_set (transitions, NULL, "left",
actor, "x", CLUTTER_LINEAR, 50.0,
NULL);
clutter_state_warp_to_state (transitions, "right");
g_signal_connect (stage,
"key-press-event",
G_CALLBACK (key_pressed_cb),
transitions);
g_signal_connect (transitions,
"completed",
G_CALLBACK (next_state),
NULL);
clutter_container_add_actor (CLUTTER_CONTAINER (stage), actor);
clutter_actor_show (stage);
clutter_main ();
g_object_unref (transitions);
return EXIT_SUCCESS;
}