mutter/doc/cookbook/examples/events-pointer-motion.c

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#include <clutter/clutter.h>
static const ClutterColor stage_color = { 0x33, 0x33, 0x55, 0xff };
static const ClutterColor rectangle_color = { 0xaa, 0x99, 0x00, 0xff };
static gboolean
_pointer_motion_cb (ClutterActor *actor,
ClutterEvent *event,
gpointer user_data)
{
gfloat stage_x, stage_y;
clutter_event_get_coords (event, &stage_x, &stage_y);
gfloat actor_x, actor_y;
clutter_actor_transform_stage_point (actor,
stage_x, stage_y,
&actor_x, &actor_y);
g_debug ("pointer @ stage x %.0f, y %.0f; actor x %.0f, y %.0f",
stage_x, stage_y,
actor_x, actor_y);
return TRUE;
}
int
main (int argc, char *argv[])
{
ClutterActor *stage;
ClutterActor *rectangle;
clutter_init (&argc, &argv);
stage = clutter_stage_get_default ();
clutter_actor_set_size (stage, 400, 400);
clutter_stage_set_color (CLUTTER_STAGE (stage), &stage_color);
rectangle = clutter_rectangle_new_with_color (&rectangle_color);
clutter_actor_set_size (rectangle, 300, 300);
clutter_actor_set_position (rectangle, 50, 50);
clutter_actor_set_reactive (rectangle, TRUE);
clutter_container_add_actor (CLUTTER_CONTAINER (stage), rectangle);
g_signal_connect (rectangle,
"motion-event",
G_CALLBACK (_pointer_motion_cb),
NULL);
clutter_actor_show (stage);
clutter_main ();
return 0;
}