org.jhotdraw.app.action
Class SaveBeforeAction

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

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 SaveBeforeAction
extends AbstractProjectAction

Base class for actions that can only be safely performed when the project has no unsaved changes.

If the project 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 project is saved, and doIt is only invoked after the project was successfully saved.

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, LONG_DESCRIPTION, MNEMONIC_KEY, NAME, SHORT_DESCRIPTION, SMALL_ICON

Constructor Summary

SaveBeforeAction(Application app)
Creates a new instance.

Method Summary

void	actionPerformed(java.awt.event.ActionEvent evt)
protected abstract void	doIt(Project p)
protected void	fileSaved(Project p, java.io.File file, java.lang.Object value)
protected void	saveChanges(Project p)
protected void	saveToFile(Project p, java.io.File file)

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

getApplication, getCurrentProject, installProjectListeners, isEnabled, setEnabled, uninstallProjectListeners, updateEnabled, updateProject

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

SaveBeforeAction

public SaveBeforeAction(Application app)

Creates a new instance.

Method Detail

actionPerformed

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

saveChanges

protected void saveChanges(Project p)

saveToFile

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

fileSaved

protected void fileSaved(Project p,
                         java.io.File file,
                         java.lang.Object value)

doIt

protected abstract void doIt(Project p)