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);

Hierarchy

hierarchy this ClutterBindConstraint ancestor_0 ClutterConstraint ancestor_0--this ancestor_1 ClutterActorMeta ancestor_1--ancestor_0 ancestor_2 GInitiallyUnowned ancestor_2--ancestor_1 ancestor_3 GObject ancestor_3--ancestor_2

Constructors

clutter_bind_constraint_new

Creates a new constraint, binding a ClutterActors position to the given coordinate of the position of source.

Instance methods

clutter_bind_constraint_get_coordinate

Retrieves the bound coordinate of the constraint.

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()

clutter_bind_constraint_set_coordinate

Sets the coordinate to bind in the constraint.

clutter_bind_constraint_set_offset

Sets the offset to be applied to the constraint.

clutter_bind_constraint_set_source

Sets the source ClutterActor for the constraint.

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.

Methods inherited from GObject (43)

Please see GObject for a full list of methods.

Properties

Clutter.BindConstraint:coordinate

The coordinate to be bound.

Clutter.BindConstraint:offset

The offset, in pixels, to be applied to the binding.

Clutter.BindConstraint:source

The ClutterActor used as the source for the binding.

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.

Class structure

struct ClutterBindConstraintClass {
  ClutterConstraintClass parent_class;
  
}

No description available.

Class members
parent_class: ClutterConstraintClass

No description available.