mutter/examples/behave.c

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#include <clutter/clutter.h>
int
main (int argc, char *argv[])
{
ClutterTimeline *timeline;
ClutterAlpha *alpha;
ClutterBehaviour *behave;
ClutterActor *stage, *hand;
ClutterColor stage_color = { 0xcc, 0xcc, 0xcc, 0xff };
GdkPixbuf *pixbuf;
clutter_init (&argc, &argv);
stage = clutter_stage_get_default ();
g_signal_connect (stage, "button-press-event",
G_CALLBACK (clutter_main_quit),
NULL);
pixbuf = gdk_pixbuf_new_from_file ("redhand.png", NULL);
if (!pixbuf)
g_error("pixbuf load failed");
clutter_stage_set_color (CLUTTER_STAGE (stage),
&stage_color);
/* Make a hand */
hand = clutter_texture_new_from_pixbuf (pixbuf);
clutter_actor_set_position (hand, 100, 100);
clutter_group_add (CLUTTER_GROUP (stage), hand);
/* Make a timeline */
timeline = clutter_timeline_new (100, 30); /* num frames, fps */
g_object_set (timeline, "loop", TRUE, 0);
/* Set an alpha func to power behaviour - ramp is constant rise/fall */
alpha = clutter_alpha_new (timeline, CLUTTER_ALPHA_RAMP, NULL);
/* Create a behaviour for that time line */
behave = clutter_opacity_behaviour_new (0X33, 0xff, 0x00);
clutter_behaviour_set_alpha (CLUTTER_BEHAVIOUR (behave), alpha);
/* Apply it to our actor */
clutter_behaviour_apply (behave, hand);
/* start the timeline */
clutter_timeline_start (timeline);
clutter_group_show_all (CLUTTER_GROUP (stage));
clutter_main();
g_object_unref (behave);
return 0;
}