Class
ClutterBindConstraint
Description [src]
final class Clutter.BindConstraint : Clutter.Constraint
{
/* No available fields */
}A constraint binding the position or size of an actor
ClutterBindConstraint is a ClutterConstraint that binds the
position or the size of the ClutterActor to which it is applied
to the the position or the size of another ClutterActor, or “source”.
An offset can be applied to the constraint, to avoid overlapping. The offset can also be animated. For instance, the following code will set up three actors to be bound to the same origin:
// source
rect[0] = clutter_actor_new ();
clutter_actor_set_background_color (rect[0], &red_color);
clutter_actor_set_position (rect[0], x_pos, y_pos);
clutter_actor_set_size (rect[0], 100, 100);
// second rectangle
rect[1] = clutter_actor_new ();
clutter_actor_set_background_color (rect[1], &green_color);
clutter_actor_set_size (rect[1], 100, 100);
clutter_actor_set_opacity (rect[1], 0);
constraint = clutter_bind_constraint_new (rect[0], CLUTTER_BIND_X, 0.0);
clutter_actor_add_constraint_with_name (rect[1], "green-x", constraint);
constraint = clutter_bind_constraint_new (rect[0], CLUTTER_BIND_Y, 0.0);
clutter_actor_add_constraint_with_name (rect[1], "green-y", constraint);
// third rectangle
rect[2] = clutter_actor_new ();
clutter_actor_set_background_color (rect[2], &blue_color);
clutter_actor_set_size (rect[2], 100, 100);
clutter_actor_set_opacity (rect[2], 0);
constraint = clutter_bind_constraint_new (rect[0], CLUTTER_BIND_X, 0.0);
clutter_actor_add_constraint_with_name (rect[2], "blue-x", constraint);
constraint = clutter_bind_constraint_new (rect[0], CLUTTER_BIND_Y, 0.0);
clutter_actor_add_constraint_with_name (rect[2], "blue-y", constraint);
The following code animates the second and third rectangles to “expand” them horizontally from underneath the first rectangle:
clutter_actor_animate (rect[1], CLUTTER_EASE_OUT_CUBIC, 250,
"@constraints.green-x.offset", 100.0,
"opacity", 255,
NULL);
clutter_actor_animate (rect[2], CLUTTER_EASE_OUT_CUBIC, 250,
"@constraints.blue-x.offset", 200.0,
"opacity", 255,
NULL);
Constructors
clutter_bind_constraint_new
Creates a new constraint, binding a ClutterActor‘s position to
the given coordinate of the position of source.
Instance methods
clutter_bind_constraint_get_offset
Retrieves the offset set using clutter_bind_constraint_set_offset().
clutter_bind_constraint_get_source
Retrieves the ClutterActor set using clutter_bind_constraint_set_source().
Methods inherited from ClutterConstraint (1)
clutter_constraint_update_preferred_size
Asks the constraint to update the size request of a ClutterActor.
Methods inherited from ClutterActorMeta (5)
clutter_actor_meta_get_actor
Retrieves a pointer to the ClutterActor that owns meta.
clutter_actor_meta_get_enabled
Retrieves whether meta is enabled.
clutter_actor_meta_get_name
Retrieves the name set using clutter_actor_meta_set_name().
clutter_actor_meta_set_enabled
Sets whether meta should be enabled or not.
clutter_actor_meta_set_name
Sets the name of meta.
Properties
Properties inherited from ClutterActorMeta (3)
Clutter.ActorMeta:actor
The ClutterActor attached to the ClutterActorMeta instance.
Clutter.ActorMeta:enabled
Whether or not the ClutterActorMeta is enabled.
Clutter.ActorMeta:name
The unique name to access the ClutterActorMeta.
Signals
Signals inherited from GObject (1)
GObject::notify
The notify signal is emitted on an object when one of its properties has its value set through g_object_set_property(), g_object_set(), et al.