--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/src/share/classes/javax/swing/DefaultSingleSelectionModel.java Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,176 @@
+/*
+ * Copyright 1997-2004 Sun Microsystems, Inc. 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. Sun designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ */
+
+package javax.swing;
+
+import javax.swing.event.*;
+import java.io.Serializable;
+import java.util.EventListener;
+
+/**
+ * A generic implementation of SingleSelectionModel.
+ * <p>
+ * <strong>Warning:</strong>
+ * Serialized objects of this class will not be compatible with
+ * future Swing releases. The current serialization support is
+ * appropriate for short term storage or RMI between applications running
+ * the same version of Swing. As of 1.4, support for long term storage
+ * of all JavaBeans<sup><font size="-2">TM</font></sup>
+ * has been added to the <code>java.beans</code> package.
+ * Please see {@link java.beans.XMLEncoder}.
+ *
+ * @author Dave Moore
+ */
+public class DefaultSingleSelectionModel implements SingleSelectionModel,
+Serializable {
+ /* Only one ModelChangeEvent is needed per model instance since the
+ * event's only (read-only) state is the source property. The source
+ * of events generated here is always "this".
+ */
+ protected transient ChangeEvent changeEvent = null;
+ /** The collection of registered listeners */
+ protected EventListenerList listenerList = new EventListenerList();
+
+ private int index = -1;
+
+ // implements javax.swing.SingleSelectionModel
+ public int getSelectedIndex() {
+ return index;
+ }
+
+ // implements javax.swing.SingleSelectionModel
+ public void setSelectedIndex(int index) {
+ if (this.index != index) {
+ this.index = index;
+ fireStateChanged();
+ }
+ }
+
+ // implements javax.swing.SingleSelectionModel
+ public void clearSelection() {
+ setSelectedIndex(-1);
+ }
+
+ // implements javax.swing.SingleSelectionModel
+ public boolean isSelected() {
+ boolean ret = false;
+ if (getSelectedIndex() != -1) {
+ ret = true;
+ }
+ return ret;
+ }
+
+ /**
+ * Adds a <code>ChangeListener</code> to the button.
+ */
+ public void addChangeListener(ChangeListener l) {
+ listenerList.add(ChangeListener.class, l);
+ }
+
+ /**
+ * Removes a <code>ChangeListener</code> from the button.
+ */
+ public void removeChangeListener(ChangeListener l) {
+ listenerList.remove(ChangeListener.class, l);
+ }
+
+ /**
+ * Returns an array of all the change listeners
+ * registered on this <code>DefaultSingleSelectionModel</code>.
+ *
+ * @return all of this model's <code>ChangeListener</code>s
+ * or an empty
+ * array if no change listeners are currently registered
+ *
+ * @see #addChangeListener
+ * @see #removeChangeListener
+ *
+ * @since 1.4
+ */
+ public ChangeListener[] getChangeListeners() {
+ return (ChangeListener[])listenerList.getListeners(
+ ChangeListener.class);
+ }
+
+ /**
+ * Notifies all listeners that have registered interest for
+ * notification on this event type. The event instance
+ * is created lazily.
+ * @see EventListenerList
+ */
+ protected void fireStateChanged() {
+ // Guaranteed to return a non-null array
+ Object[] listeners = listenerList.getListenerList();
+ // Process the listeners last to first, notifying
+ // those that are interested in this event
+ for (int i = listeners.length-2; i>=0; i-=2) {
+ if (listeners[i]==ChangeListener.class) {
+ // Lazily create the event:
+ if (changeEvent == null)
+ changeEvent = new ChangeEvent(this);
+ ((ChangeListener)listeners[i+1]).stateChanged(changeEvent);
+ }
+ }
+ }
+
+ /**
+ * Returns an array of all the objects currently registered as
+ * <code><em>Foo</em>Listener</code>s
+ * upon this model.
+ * <code><em>Foo</em>Listener</code>s
+ * are registered using the <code>add<em>Foo</em>Listener</code> method.
+ * <p>
+ * You can specify the <code>listenerType</code> argument
+ * with a class literal, such as <code><em>Foo</em>Listener.class</code>.
+ * For example, you can query a <code>DefaultSingleSelectionModel</code>
+ * instance <code>m</code>
+ * for its change listeners
+ * with the following code:
+ *
+ * <pre>ChangeListener[] cls = (ChangeListener[])(m.getListeners(ChangeListener.class));</pre>
+ *
+ * If no such listeners exist,
+ * this method returns an empty array.
+ *
+ * @param listenerType the type of listeners requested;
+ * this parameter should specify an interface
+ * that descends from <code>java.util.EventListener</code>
+ * @return an array of all objects registered as
+ * <code><em>Foo</em>Listener</code>s
+ * on this model,
+ * or an empty array if no such
+ * listeners have been added
+ * @exception ClassCastException if <code>listenerType</code> doesn't
+ * specify a class or interface that implements
+ * <code>java.util.EventListener</code>
+ *
+ * @see #getChangeListeners
+ *
+ * @since 1.3
+ */
+ public <T extends EventListener> T[] getListeners(Class<T> listenerType) {
+ return listenerList.getListeners(listenerType);
+ }
+}