org.jhotdraw.app.action.edit

Class ClearSelectionAction

java.lang.Object

javax.swing.AbstractAction

org.jhotdraw.app.action.edit.AbstractSelectionAction

org.jhotdraw.app.action.edit.ClearSelectionAction

All Implemented Interfaces:

java.awt.event.ActionListener, java.io.Serializable, java.lang.Cloneable, java.util.EventListener, javax.swing.Action

public class ClearSelectionAction
extends AbstractSelectionAction

Clears (de-selects) the selected region.

This action acts on the last EditableComponent / JTextComponent which had the focus when the ActionEvent was generated.

This action is called when the user selects the Clear Selection item in the Edit menu. The menu item is automatically created by the application.

If you want this behavior in your application, you have to create an action with this ID and put it in your ApplicationModel in method ApplicationModel.initApplication(org.jhotdraw.app.Application).

Design Patterns

Framework
The interfaces and classes listed below work together:
Contract: EditableComponent, JTextComponent.
Client: AbstractSelectionAction, DeleteAction, DuplicateAction, SelectAllAction, ClearSelectionAction.

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
static java.lang.String	ID

Fields inherited from class org.jhotdraw.app.action.edit.AbstractSelectionAction

target

Fields inherited from class javax.swing.AbstractAction

changeSupport, enabled

Fields inherited from interface javax.swing.Action

ACCELERATOR_KEY, ACTION_COMMAND_KEY, DEFAULT, DISPLAYED_MNEMONIC_INDEX_KEY, LARGE_ICON_KEY, LONG_DESCRIPTION, MNEMONIC_KEY, NAME, SELECTED_KEY, SHORT_DESCRIPTION, SMALL_ICON

Constructor Summary

Constructors

Constructor and Description
ClearSelectionAction() Creates a new instance which acts on the currently focused component.
ClearSelectionAction(javax.swing.JComponent target) Creates a new instance which acts on the specified component.

Method Summary

Modifier and Type	Method and Description
void	actionPerformed(java.awt.event.ActionEvent evt)
protected void	updateEnabled()

Methods inherited from class javax.swing.AbstractAction

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

Methods inherited from class java.lang.Object

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

Field Detail

ID

public static final java.lang.String ID

See Also:

Constant Field Values

Constructor Detail

ClearSelectionAction

public ClearSelectionAction()

Creates a new instance which acts on the currently focused component.

ClearSelectionAction

public ClearSelectionAction(javax.swing.JComponent target)

Creates a new instance which acts on the specified component.

Parameters:

target - The target of the action. Specify null for the currently focused component.

Method Detail

actionPerformed

public void actionPerformed(java.awt.event.ActionEvent evt)

updateEnabled

protected void updateEnabled()

Overrides:

updateEnabled in class AbstractSelectionAction