org.jhotdraw.app.action.file.ClearRecentFilesMenuAction Maven / Gradle / Ivy
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/*
* @(#)ClearRecentFilesMenuAction.java
*
* Copyright (c) 1996-2010 by the original authors of JHotDraw and all its
* contributors. All rights reserved.
*
* You may not use, copy or modify this file, except in compliance with the
* license agreement you entered into with the copyright holders. For details
* see accompanying license terms.
*/
package org.jhotdraw.app.action.file;
import org.jhotdraw.util.*;
import java.awt.event.ActionEvent;
import java.beans.*;
import org.jhotdraw.app.Application;
import org.jhotdraw.app.action.AbstractApplicationAction;
/**
* Clears (empties) the Recent Files sub-menu in the File menu.
*
* This action is called when the user selects the Clear Recent Files item in
* the Recent Files sub-menu of the File menu. The action and the menu item
* is automatically created by the application, when the
* {@code ApplicationModel} provides a {@code LoadFileAction} or a
* {@code OpenFileAction}.
*
*
* @author Werner Randelshofer.
* @version $Id: ClearRecentFilesMenuAction.java 717 2010-11-21 12:30:57Z rawcoder $
*/
public class ClearRecentFilesMenuAction extends AbstractApplicationAction {
public final static String ID = "file.clearRecentFiles";
private PropertyChangeListener applicationListener;
/** Creates a new instance. */
public ClearRecentFilesMenuAction(Application app) {
super(app);
ResourceBundleUtil labels = ResourceBundleUtil.getBundle("org.jhotdraw.app.Labels");
labels.configureAction(this, ID);
updateEnabled();
}
/**
* Installs listeners on the application object.
*/
@Override protected void installApplicationListeners(Application app) {
super.installApplicationListeners(app);
if (applicationListener == null) {
applicationListener = createApplicationListener();
}
app.addPropertyChangeListener(applicationListener);
}
private PropertyChangeListener createApplicationListener() {
return new PropertyChangeListener() {
@Override
public void propertyChange(PropertyChangeEvent evt) {
if (evt.getPropertyName() == "recentFiles") { // Strings get interned
updateEnabled();
}
}
};
}
/**
* Installs listeners on the application object.
*/
@Override protected void uninstallApplicationListeners(Application app) {
super.uninstallApplicationListeners(app);
app.removePropertyChangeListener(applicationListener);
}
@Override
public void actionPerformed(ActionEvent e) {
getApplication().clearRecentURIs();
}
private void updateEnabled() {
setEnabled(getApplication().getRecentURIs().size() > 0);
}
}