org.jhotdraw.app.action

Class AbstractApplicationAction

java.lang.Object

javax.swing.AbstractAction

org.jhotdraw.app.action.AbstractApplicationAction

All Implemented Interfaces:

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

Direct Known Subclasses:

AboutAction, AbstractPreferencesAction, ClearRecentFilesMenuAction, ExitAction, NewFileAction, OpenApplicationAction, OpenApplicationFileAction, OpenFileAction, OpenRecentFileAction, ReOpenApplicationAction

public abstract class AbstractApplicationAction
extends javax.swing.AbstractAction
implements Disposable

This abstract class can be extended to implement an Action that acts on an Application.

If the Application object is disabled, the AbstractApplicationAction is disabled as well.

AbstractApplicationAction listens using a WeakPropertyChangeListener on the Application and thus may become garbage collected if it is not referenced by any other object.

Application actions are typically created by an ApplicationModel, and can be retrieved using getAction(String) from the application model. Application model typically links the actions to menu items and toolbars that it creates. Applicaton model may also put actions into its Views, so that they can be linked to components of a view.

See Also:

Serialized Form

Field Summary

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
AbstractApplicationAction(Application app) Creates a new instance.

Method Summary

Modifier and Type	Method and Description
void	dispose() Disposes of all resources held by this object so that they can be garbage collected.
Application	getApplication()
protected void	installApplicationListeners(Application app)
boolean	isEnabled() Returns true if the action is enabled.
void	setEnabled(boolean newValue) Enables or disables the action.
protected void	uninstallApplicationListeners(Application app) Installs listeners on the application object.
protected void	updateApplicationEnabled() Updates the enabled state of this action depending on the new enabled state of the application.

Methods inherited from class javax.swing.AbstractAction

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

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

Constructor Detail

AbstractApplicationAction

public AbstractApplicationAction(Application app)

Creates a new instance.

Method Detail

installApplicationListeners

protected void installApplicationListeners(Application app)

uninstallApplicationListeners

protected void uninstallApplicationListeners(Application app)

Installs listeners on the application object.

getApplication

public Application getApplication()

updateApplicationEnabled

protected void updateApplicationEnabled()

Updates the enabled state of this action depending on the new enabled state of the application.

isEnabled

public boolean isEnabled()

Returns true if the action is enabled. The enabled state of the action depends on the state that has been set using setEnabled() and on the enabled state of the application.

Specified by:

isEnabled in interface javax.swing.Action

Overrides:

isEnabled in class javax.swing.AbstractAction

Returns:

true if the action is enabled, false otherwise

See Also:

Action.isEnabled()

setEnabled

public void setEnabled(boolean newValue)

Enables or disables the action. The enabled state of the action depends on the value that is set here and on the enabled state of the application.

Specified by:

setEnabled in interface javax.swing.Action

Overrides:

setEnabled in class javax.swing.AbstractAction

Parameters:

newValue - true to enable the action, false to disable it

See Also:

Action.setEnabled(boolean)

dispose

public final void dispose()

Description copied from interface: Disposable

Disposes of all resources held by this object so that they can be garbage collected.

Specified by:

dispose in interface Disposable