BasicTreeUI.TreeTraverseAction (Java 2 Platform SE v1.4.1) - JDK 5 Documentation v1.4.1, Java 2 SDK 英文文档

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Java^TM 2 Platform
Std. Ed. v1.4.1

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javax.swing.plaf.basic
Class BasicTreeUI.TreeTraverseAction

java.lang.Object
  |
  +--javax.swing.AbstractAction
        |
        +--javax.swing.plaf.basic.BasicTreeUI.TreeTraverseAction

All Implemented Interfaces:: Action, ActionListener, Cloneable, EventListener, Serializable

Enclosing class:: BasicTreeUI

public class BasicTreeUI.TreeTraverseAction
extends AbstractAction

TreeTraverseAction is the action used for left/right keys. Will toggle the expandedness of a node, as well as potentially incrementing the selection.

Field Summary

protected int direction
          Determines direction to traverse, 1 means expand, -1 means collapse.

Fields inherited from class javax.swing.AbstractAction

changeSupport, enabled

Fields inherited from interface javax.swing.Action

ACCELERATOR_KEY, ACTION_COMMAND_KEY, DEFAULT, LONG_DESCRIPTION, MNEMONIC_KEY, NAME, SHORT_DESCRIPTION, SMALL_ICON

Constructor Summary

BasicTreeUI.TreeTraverseAction(int direction, String name)


Method Summary

void actionPerformed(ActionEvent e)
          Invoked when an action occurs.

boolean isEnabled()
          Returns true if the action is enabled.

Methods inherited from class javax.swing.AbstractAction

addPropertyChangeListener, clone, firePropertyChange, getKeys, getPropertyChangeListeners, getValue, putValue, removePropertyChangeListener, setEnabled

Methods inherited from class java.lang.Object

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

Field Detail

direction

protected int direction

Determines direction to traverse, 1 means expand, -1 means collapse.

Constructor Detail

BasicTreeUI.TreeTraverseAction

public BasicTreeUI.TreeTraverseAction(int direction,
                                      String name)

Method Detail

actionPerformed

public void actionPerformed(ActionEvent e)

Description copied from interface: ActionListener

Invoked when an action occurs.

isEnabled

public boolean isEnabled()

Description copied from class: AbstractAction

Returns true if the action is enabled.

Specified by:: isEnabled in interface Action
Overrides:: isEnabled in class AbstractAction

Returns:: true if the action is enabled, false otherwise
See Also:: Action.isEnabled()