org.eclipse.gef.layout.algorithms

Class TreeLayoutHelper.TreeListener

java.lang.Object

org.eclipse.gef.layout.algorithms.TreeLayoutHelper.TreeListener

Enclosing class:

TreeLayoutHelper

public static class TreeLayoutHelper.TreeListener
extends java.lang.Object

A superclass for listeners that can be added to this observer to get notification whenever the tree structure changes.

Constructor Summary

Constructors

Constructor and Description
TreeListener()

Method Summary

Modifier and Type	Method and Description
protected void	defaultHandle(TreeLayoutHelper.TreeNode changedNode) A convenience method that can be overridden if a listener reacts the same way to all events.
void	nodeAdded(TreeLayoutHelper.TreeNode newNode) Called when new node is added to the tree structure.
void	nodeRemoved(TreeLayoutHelper.TreeNode removedNode) Called when a node is removed from the tree structure.
void	parentChanged(TreeLayoutHelper.TreeNode node, TreeLayoutHelper.TreeNode previousParent) Called when a node changes its parent.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

TreeListener

public TreeListener()

Method Detail

nodeAdded

public void nodeAdded(TreeLayoutHelper.TreeNode newNode)

Called when new node is added to the tree structure. The new node will not have any connections, so it will be a child of Super Root

Parameters:

newNode - the added node

nodeRemoved

public void nodeRemoved(TreeLayoutHelper.TreeNode removedNode)

Called when a node is removed from the tree structure. The given node no longer exists in the tree at the moment of call.

Parameters:

removedNode - the removed node

parentChanged

public void parentChanged(TreeLayoutHelper.TreeNode node,
                          TreeLayoutHelper.TreeNode previousParent)

Called when a node changes its parent.

Parameters:

node - node that changes its parent

previousParent - previous parent of the node

defaultHandle

protected void defaultHandle(TreeLayoutHelper.TreeNode changedNode)

A convenience method that can be overridden if a listener reacts the same way to all events. By default it's called in every event handler and does nothing.

Parameters:

changedNode - the node that has changed