org.jhotdraw.app.action
Class AbstractProjectAction

java.lang.Object
  javax.swing.AbstractAction
      org.jhotdraw.app.action.AbstractProjectAction

All Implemented Interfaces:

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

Direct Known Subclasses:

ExportAction, MaximizeAction, MinimizeAction, ProjectPropertyAction, RedoAction, SaveAction, SaveBeforeAction, ToggleProjectPropertyAction, UndoAction

public abstract class AbstractProjectAction
extends javax.swing.AbstractAction

An Action that acts on on the current Project of an Application. If the current Project object is disabled or is null, the AbstractProjectAction is disabled as well.

See Also:

Project, Application, 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, LONG_DESCRIPTION, MNEMONIC_KEY, NAME, SHORT_DESCRIPTION, SMALL_ICON

Constructor Summary

AbstractProjectAction(Application app)
Creates a new instance.

Method Summary

Application	getApplication()
Project	getCurrentProject()
protected void	installProjectListeners(Project p) Installs listeners on the project object.
boolean	isEnabled() Returns true if the action is enabled.
void	setEnabled(boolean newValue) Enables or disables the action.
protected void	uninstallProjectListeners(Project p) Installs listeners on the project object.
protected void	updateEnabled(boolean oldValue, boolean newValue) Updates the enabled state of this action depending on the new enabled state of the project.
protected void	updateProject(Project oldValue, Project newValue) Updates the project of this action depending on the current project 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

AbstractProjectAction

public AbstractProjectAction(Application app)

Creates a new instance.

Method Detail

updateProject

protected void updateProject(Project oldValue,
                             Project newValue)

Updates the project of this action depending on the current project of the application.

installProjectListeners

protected void installProjectListeners(Project p)

Installs listeners on the project object.

uninstallProjectListeners

protected void uninstallProjectListeners(Project p)

Installs listeners on the project object.

updateEnabled

protected void updateEnabled(boolean oldValue,
                             boolean newValue)

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

getApplication

public Application getApplication()

getCurrentProject

public Project getCurrentProject()

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)