jadex.commons.gui

Class TreeExpansionHandler

java.lang.Object

jadex.commons.gui.TreeExpansionHandler

All Implemented Interfaces:

java.util.EventListener, javax.swing.event.TreeExpansionListener, javax.swing.event.TreeModelListener

public class TreeExpansionHandler
extends java.lang.Object
implements javax.swing.event.TreeExpansionListener, javax.swing.event.TreeModelListener

The tree expansion handler assures that tree nodes stay expanded, even when their last child is removed, and then new child nodes are added. Swing doesn't do this on its own, grrr.

Field Summary

Fields

Modifier and Type	Field and Description
protected java.util.Set	expanded A set with the tree nodes, which are expanded.
protected javax.swing.JTree	tree The tree.

Constructor Summary

Constructors

Constructor and Description
TreeExpansionHandler(javax.swing.JTree tree) Create a tree expansion handler for a given tree.

Method Summary

Modifier and Type	Method and Description
protected IFuture	handlePath(javax.swing.tree.TreePath path) Check if an action (e.g.
void	handleTreeStructureChanged(javax.swing.event.TreeModelEvent event, javax.swing.tree.TreePath root, int i) Handle each node in the subtree.
boolean	isExpanded(javax.swing.tree.TreePath path) Test if a path is expanded or should be.
static boolean	isTreeExpanded(javax.swing.JTree tree, javax.swing.tree.TreePath path) Test if a tree node is expanded or should be.
void	treeCollapsed(javax.swing.event.TreeExpansionEvent event) Called whenever an item in the tree has been collapsed.
void	treeExpanded(javax.swing.event.TreeExpansionEvent event) Called whenever an item in the tree has been expanded.
void	treeNodesChanged(javax.swing.event.TreeModelEvent event) Invoked after a node (or a set of siblings) has changed in some way.
void	treeNodesInserted(javax.swing.event.TreeModelEvent event) Invoked after nodes have been inserted into the tree.
void	treeNodesRemoved(javax.swing.event.TreeModelEvent event) Invoked after nodes have been removed from the tree.
void	treeStructureChanged(javax.swing.event.TreeModelEvent event) Invoked after the tree has drastically changed structure from a given node down.

Methods inherited from class java.lang.Object

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

Field Detail

tree

protected javax.swing.JTree tree

The tree.

expanded

protected java.util.Set expanded

A set with the tree nodes, which are expanded.

Constructor Detail

TreeExpansionHandler

public TreeExpansionHandler(javax.swing.JTree tree)

Create a tree expansion handler for a given tree.

Method Detail

treeExpanded

public void treeExpanded(javax.swing.event.TreeExpansionEvent event)

Called whenever an item in the tree has been expanded.

Specified by:

treeExpanded in interface javax.swing.event.TreeExpansionListener

treeCollapsed

public void treeCollapsed(javax.swing.event.TreeExpansionEvent event)

Called whenever an item in the tree has been collapsed.

Specified by:

treeCollapsed in interface javax.swing.event.TreeExpansionListener

treeNodesChanged

public void treeNodesChanged(javax.swing.event.TreeModelEvent event)

Invoked after a node (or a set of siblings) has changed in some way.

Specified by:

treeNodesChanged in interface javax.swing.event.TreeModelListener

treeNodesInserted

public void treeNodesInserted(javax.swing.event.TreeModelEvent event)

Invoked after nodes have been inserted into the tree.

Specified by:

treeNodesInserted in interface javax.swing.event.TreeModelListener

treeNodesRemoved

public void treeNodesRemoved(javax.swing.event.TreeModelEvent event)

Invoked after nodes have been removed from the tree.

Specified by:

treeNodesRemoved in interface javax.swing.event.TreeModelListener

treeStructureChanged

public void treeStructureChanged(javax.swing.event.TreeModelEvent event)

Invoked after the tree has drastically changed structure from a given node down.

Specified by:

treeStructureChanged in interface javax.swing.event.TreeModelListener

handleTreeStructureChanged

public void handleTreeStructureChanged(javax.swing.event.TreeModelEvent event,
                                       javax.swing.tree.TreePath root,
                                       int i)

Handle each node in the subtree. Wait for node to be expanded before continuing to inlcude subnodes.

handlePath

protected IFuture handlePath(javax.swing.tree.TreePath path)

Check if an action (e.g. expand) has to be performed on the path.

isExpanded

public boolean isExpanded(javax.swing.tree.TreePath path)

Test if a path is expanded or should be.

isTreeExpanded

public static boolean isTreeExpanded(javax.swing.JTree tree,
                                     javax.swing.tree.TreePath path)

Test if a tree node is expanded or should be.