com.alee.utils.swing

Class AutoExpandSingleChildNodeListener

java.lang.Object

com.alee.utils.swing.AutoExpandSingleChildNodeListener

All Implemented Interfaces:

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

public class AutoExpandSingleChildNodeListener
extends java.lang.Object
implements javax.swing.event.TreeExpansionListener

Tree expansion listener that automatically expands node futher if it has only one child. Actual expand operation occurs right after node expand event and works only on its children. Be aware that this listener is not suited for async trees.

Constructor Summary

Constructors

Constructor and Description
AutoExpandSingleChildNodeListener()

Method Summary

Modifier and Type	Method and Description
static AutoExpandSingleChildNodeListener	install(javax.swing.JTree tree) Installs listener into tree and ensures that it is the only one installed.
static boolean	isInstalled(javax.swing.JTree tree) Returns whether the specified tree has any listeners installed or not.
void	treeCollapsed(javax.swing.event.TreeExpansionEvent event)
void	treeExpanded(javax.swing.event.TreeExpansionEvent event)
static void	uninstall(javax.swing.JTree tree) Uninstalls all listeners from the specified tree.

Methods inherited from class java.lang.Object

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

Constructor Detail

AutoExpandSingleChildNodeListener

public AutoExpandSingleChildNodeListener()

Method Detail

treeExpanded

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

Specified by:

treeExpanded in interface javax.swing.event.TreeExpansionListener

treeCollapsed

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

Specified by:

treeCollapsed in interface javax.swing.event.TreeExpansionListener

install

public static AutoExpandSingleChildNodeListener install(javax.swing.JTree tree)

Installs listener into tree and ensures that it is the only one installed.

Parameters:

tree - tree to modify

Returns:

installed listener

uninstall

public static void uninstall(javax.swing.JTree tree)

Uninstalls all listeners from the specified tree.

Parameters:

tree - tree to modify

isInstalled

public static boolean isInstalled(javax.swing.JTree tree)

Returns whether the specified tree has any listeners installed or not.

Parameters:

tree - tree to process

Returns:

true if the specified tree has any listeners installed, false otherwise