static void
clutter_behaviour_path_alpha_notify (ClutterBehaviour *behave,
gdouble alpha_value)
{
ClutterBehaviourPath *pathb = CLUTTER_BEHAVIOUR_PATH (behave);
ClutterBehaviourPathPrivate *priv = pathb->priv;
ClutterKnot position;
guint knot_num;
if (priv->path)
knot_num = clutter_path_get_position (priv->path, alpha_value, &position);
else
{
memset (&position, 0, sizeof (position));
knot_num = 0;
}
clutter_behaviour_actors_foreach (behave,
actor_apply_knot_foreach,
&position);
if (knot_num != priv->last_knot_passed)
{
g_signal_emit (behave, path_signals[KNOT_REACHED], 0, knot_num);
priv->last_knot_passed = knot_num;
}
}
static void
clutter_path_constraint_update_allocation (ClutterConstraint *constraint,
ClutterActor *actor,
ClutterActorBox *allocation)
{
ClutterPathConstraint *self = CLUTTER_PATH_CONSTRAINT (constraint);
gfloat width, height;
ClutterKnot position;
guint knot_id;
if (self->path == NULL)
return;
knot_id = clutter_path_get_position (self->path, self->offset, &position);
clutter_actor_box_get_size (allocation, &width, &height);
allocation->x1 = position.x;
allocation->y1 = position.y;
allocation->x2 = allocation->x1 + width;
allocation->y2 = allocation->y1 + height;
if (knot_id != self->current_node)
{
self->current_node = knot_id;
g_signal_emit (self, path_signals[NODE_REACHED], 0,
self->actor,
self->current_node);
}
}
static gboolean
path_test_get_position (CallbackData *data)
{
static const float values[] = { 0.125f, 16.0f, 16.0f,
0.375f, 48.0f, 48.0f,
0.625f, 80.0f, 48.0f,
0.875f, 112.0f, 16.0f };
gint i;
set_triangle_path (data);
for (i = 0; i < G_N_ELEMENTS (values); i += 3)
{
ClutterKnot pos;
clutter_path_get_position (data->path,
values[i],
&pos);
if (!float_fuzzy_equals (values[i + 1], pos.x)
|| !float_fuzzy_equals (values[i + 2], pos.y))
return FALSE;
}
return TRUE;
}
