org.jhotdraw.app.action
Class AbstractSaveBeforeAction

java.lang.Object
  javax.swing.AbstractAction
      org.jhotdraw.app.action.AbstractViewAction
          org.jhotdraw.app.action.AbstractSaveBeforeAction

All Implemented Interfaces:

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

Direct Known Subclasses:

ClearAction, CloseAction, LoadAction, LoadRecentAction

public abstract class AbstractSaveBeforeAction
extends AbstractViewAction

This abstract class can be extended to implement an Action that asks to save unsaved changes of a View before the the action is performed.

If the view has no unsaved changes, method doIt is invoked immediately. If unsaved changes are present, a dialog is shown asking whether the user wants to discard the changes, cancel or save the changes before doing it. If the user chooses to discard the chanegs, toIt is invoked immediately. If the user chooses to cancel, the action is aborted. If the user chooses to save the changes, the view is saved, and doIt is only invoked after the view was successfully saved.

Version:

$Id: AbstractSaveBeforeAction.java 556 2009-09-06 13:06:03Z rawcoder $

Author:

Werner Randelshofer

See Also:

Serialized Form

Field Summary

Fields inherited from class org.jhotdraw.app.action.AbstractViewAction

ENABLED_PROPERTY, VIEW_PROPERTY

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

AbstractSaveBeforeAction(Application app)
Creates a new instance.

AbstractSaveBeforeAction(Application app, View view)
Creates a new instance.

Method Summary

void	actionPerformed(java.awt.event.ActionEvent evt)
protected abstract void	doIt(View p)
protected void	saveChanges(View p)
protected void	saveToFile(View p, java.io.File file)

Methods inherited from class org.jhotdraw.app.action.AbstractViewAction

getActiveView, getApplication, getPropertyName, installViewListeners, isEnabled, setEnabled, setPropertyName, uninstallViewListeners, updateEnabled, updateView, updateView

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

Constructor Detail

AbstractSaveBeforeAction

public AbstractSaveBeforeAction(Application app)

Creates a new instance.

AbstractSaveBeforeAction

public AbstractSaveBeforeAction(Application app,
                                View view)

Creates a new instance.

Method Detail

actionPerformed

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

saveChanges

protected void saveChanges(View p)

saveToFile

protected void saveToFile(View p,
                          java.io.File file)

doIt

protected abstract void doIt(View p)