org.jhotdraw.app.action
Class UndoAction
java.lang.Object
javax.swing.AbstractAction
org.jhotdraw.app.action.AbstractProjectAction
org.jhotdraw.app.action.UndoAction
- All Implemented Interfaces:
- java.awt.event.ActionListener, java.io.Serializable, java.lang.Cloneable, java.util.EventListener, javax.swing.Action
public class UndoAction
- extends AbstractProjectAction
Undoes the last user action.
In order to work, this action requires that the Project returns a project
specific undo action when invoking getAction("undo") on the Project.
- Version:
- 2.0 2006-06-15 Reworked.
1.0 October 9, 2005 Created.
- Author:
- Werner Randelshofer
- See Also:
- Serialized Form
Field Summary |
static java.lang.String |
ID
|
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 |
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 |
ID
public static final java.lang.String ID
- See Also:
- Constant Field Values
UndoAction
public UndoAction(Application app)
- Creates a new instance.
updateEnabledState
protected void updateEnabledState()
updateProject
protected void updateProject(Project oldValue,
Project newValue)
- Description copied from class:
AbstractProjectAction
- Updates the listeners of this action depending on the current project
of the application.
- Overrides:
updateProject
in class AbstractProjectAction
installProjectListeners
protected void installProjectListeners(Project p)
- Installs listeners on the project object.
- Overrides:
installProjectListeners
in class AbstractProjectAction
uninstallProjectListeners
protected void uninstallProjectListeners(Project p)
- Installs listeners on the project object.
- Overrides:
uninstallProjectListeners
in class AbstractProjectAction
actionPerformed
public void actionPerformed(java.awt.event.ActionEvent e)