org.jhotdraw.app.action.edit

Class AbstractSelectionAction

java.lang.Object

javax.swing.AbstractAction

org.jhotdraw.app.action.edit.AbstractSelectionAction

All Implemented Interfaces:

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

Direct Known Subclasses:

ClearSelectionAction, CopyAction, CutAction, DuplicateAction, PasteAction, SelectAllAction

public abstract class AbstractSelectionAction
extends javax.swing.AbstractAction

AbstractSelectionAction acts on the selection of a target component.

By default, the action is disabled when the target component is disabled or has no selection. If the target component is null, updateEnabled does nothing. You can change this behavior by overriding method updateEnabled().

This action registers a WeakPropertyChangeListener on the component.

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
protected javax.swing.JComponent	target The target of the action or null if the action acts on the currently focused component.

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
AbstractSelectionAction(javax.swing.JComponent target) Creates a new instance which acts on the specified component.

Method Summary

Modifier and Type	Method and Description
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

Methods inherited from interface java.awt.event.ActionListener

actionPerformed

Field Detail

target

protected javax.swing.JComponent target

The target of the action or null if the action acts on the currently focused component.

Constructor Detail

AbstractSelectionAction

public AbstractSelectionAction(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

updateEnabled

protected void updateEnabled()