package org.simantics.g3d.scenegraph.base;


public interface NodeListener {

	/**
	 * Event occurring when a node's property is changed
	 * @param node
	 * @param child
	 * @param rel
	 */
	public void propertyChanged(INode node, String id);
	
	/**
	 * Event occurring when a new node is added to the scene-graph
	 * @param node
	 * @param child
	 * @param rel
	 */
	public <T extends INode> void nodeAdded(ParentNode<T> node, INode child, String rel);
	
	/**
	 * Event occurring when a node is removed from the scene-graph
	 * @param nodeThe node, which contained the removed node.
	 * @param child The removed node.
	 * @param rel 
	 */
	public <T extends INode> void nodeRemoved(ParentNode<T> node, INode child, String rel);
}