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mutter-performance-source/doc/cookbook/examples/animations-moving-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 const ClutterColor green_color = { 0x00, 0xff, 0x00, 0xff };
static gboolean
button_pressed_cb (ClutterActor *actor,
ClutterEvent *event,
gpointer user_data)
{
ClutterState *transitions = CLUTTER_STATE (user_data);
/* set the state to the one with a name matching the actor's name */
clutter_state_set_state (transitions, clutter_actor_get_name (actor));
return TRUE;
}
int
main (int argc,
char *argv[])
{
ClutterActor *stage;
ClutterActor *red;
ClutterActor *green;
ClutterState *transitions;
clutter_init (&argc, &argv);
stage = clutter_stage_get_default ();
clutter_actor_set_size (stage, 650, 500);
clutter_stage_set_color (CLUTTER_STAGE (stage), &stage_color);
g_signal_connect (stage, "destroy", G_CALLBACK (clutter_main_quit), NULL);
/* actor names choose the next ClutterState to transition to */
red = clutter_rectangle_new_with_color (&red_color);
clutter_actor_set_reactive (red, TRUE);
clutter_actor_set_name (red, "red");
clutter_actor_set_size (red, 100, 100);
clutter_actor_set_position (red, 50, 50);
green = clutter_rectangle_new_with_color (&green_color);
clutter_actor_set_reactive (green, TRUE);
clutter_actor_set_name (green, "green");
clutter_actor_set_size (green, 100, 100);
clutter_actor_set_position (green, 50, 350);
transitions = clutter_state_new ();
clutter_state_set_duration (transitions, NULL, NULL, 250);
/* state names match actor names */
clutter_state_set (transitions, NULL, "red",
red, "x", CLUTTER_EASE_OUT_CUBIC, 200.0,
red, "y", CLUTTER_EASE_OUT_CUBIC, 50.0,
red, "scale-x", CLUTTER_EASE_OUT_CUBIC, 4.0,
red, "scale-y", CLUTTER_EASE_OUT_CUBIC, 4.0,
green, "x", CLUTTER_EASE_OUT_CUBIC, 50.0,
green, "y", CLUTTER_EASE_OUT_CUBIC, 350.0,
green, "scale-x", CLUTTER_EASE_OUT_CUBIC, 1.0,
green, "scale-y", CLUTTER_EASE_OUT_CUBIC, 1.0,
NULL);
clutter_state_set (transitions, NULL, "green",
green, "x", CLUTTER_EASE_OUT_CUBIC, 200.0,
green, "y", CLUTTER_EASE_OUT_CUBIC, 50.0,
green, "scale-x", CLUTTER_EASE_OUT_CUBIC, 4.0,
green, "scale-y", CLUTTER_EASE_OUT_CUBIC, 4.0,
red, "x", CLUTTER_EASE_OUT_CUBIC, 50.0,
red, "y", CLUTTER_EASE_OUT_CUBIC, 50.0,
red, "scale-x", CLUTTER_EASE_OUT_CUBIC, 1.0,
red, "scale-y", CLUTTER_EASE_OUT_CUBIC, 1.0,
NULL);
g_signal_connect (red,
"button-press-event",
G_CALLBACK (button_pressed_cb),
transitions);
g_signal_connect (green,
"button-press-event",
G_CALLBACK (button_pressed_cb),
transitions);
clutter_container_add (CLUTTER_CONTAINER (stage),
red,
green,
NULL);
clutter_actor_show (stage);
clutter_main ();
g_object_unref (transitions);
return EXIT_SUCCESS;
}