/* * Copyright (c) 2003, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. Oracle designates this * particular file as subject to the "Classpath" exception as provided * by Oracle in the LICENSE file that accompanied this code. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */ package sun.swing; import java.beans.PropertyChangeListener; import javax.swing.Action; /** * UIAction is the basis of all of basic's action classes that are used in * an ActionMap. Subclasses need to override actionPerformed. *

* A typical subclass will look like: *

 *    private static class Actions extends UIAction {
 *        Actions(String name) {
 *            super(name);
 *        }
 *
 *        public void actionPerformed(ActionEvent ae) {
 *            if (getName() == "selectAll") {
 *                selectAll();
 *            }
 *            else if (getName() == "cancelEditing") {
 *                cancelEditing();
 *            }
 *        }
 *    }
 * 
*

* Subclasses that wish to conditionalize the enabled state should override * isEnabled(Component), and be aware that the passed in * Component may be null. * * @see com.sun.java.swing.ExtendedAction * @see javax.swing.Action * @author Scott Violet */ public abstract class UIAction implements Action { private String name; public UIAction(String name) { this.name = name; } public final String getName() { return name; } public Object getValue(String key) { if (key == NAME) { return name; } return null; } // UIAction is not mutable, this does nothing. public void putValue(String key, Object value) { } // UIAction is not mutable, this does nothing. public void setEnabled(boolean b) { } /** * Cover method for isEnabled(null). */ public final boolean isEnabled() { return isEnabled(null); } /** * Subclasses that need to conditionalize the enabled state should * override this. Be aware that sender may be null. * * @param sender Widget enabled state is being asked for, may be null. */ public boolean isEnabled(Object sender) { return true; } // UIAction is not mutable, this does nothing. public void addPropertyChangeListener(PropertyChangeListener listener) { } // UIAction is not mutable, this does nothing. public void removePropertyChangeListener(PropertyChangeListener listener) { } }