Node.LifecycleListener

  • Node.LifecycleListener is an interface for receiving callbacks during a node's lifecycle events.

  • It provides methods to be notified when a node is activated (onActivated), deactivated (onDeactivated), and updated (onUpdated).

  • These methods receive the affected node as a parameter, and onUpdated also provides frame timing information.

  • Several classes, like RotationController and ScaleController, indirectly implement this interface.
public static interface Node.LifecycleListener
Known Indirect Subclasses

Interface definition for callbacks to be invoked when node lifecycle events occur.

Public Methods

abstract void
onActivated(Node node)
Notifies the listener that onActivate() was called.
abstract void
onDeactivated(Node node)
Notifies the listener that onDeactivate() was called.
abstract void
onUpdated(Node node, FrameTime frameTime)
Notifies the listener that onUpdate(FrameTime) was called.

Public Methods

public abstract void onActivated (Node node)

Notifies the listener that onActivate() was called.

Parameters
node the node that was activated

public abstract void onDeactivated (Node node)

Notifies the listener that onDeactivate() was called.

Parameters
node the node that was deactivated

public abstract void onUpdated (Node node, FrameTime frameTime)

Notifies the listener that onUpdate(FrameTime) was called.

Parameters
node the node that was updated
frameTime provides time information for the current frame