author | yan |
Tue, 24 Sep 2013 16:36:00 +0400 | |
changeset 20157 | cafca01a8e28 |
parent 5506 | 202f599c92aa |
child 20458 | f2423fb3fd19 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 1997, 2008, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. Oracle designates this |
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* particular file as subject to the "Classpath" exception as provided |
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* by Oracle in the LICENSE file that accompanied this code. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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*/ |
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package javax.swing; |
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import javax.swing.event.*; |
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import java.io.Serializable; |
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import java.util.EventListener; |
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/** |
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* A generic implementation of SingleSelectionModel. |
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* <p> |
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* <strong>Warning:</strong> |
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* Serialized objects of this class will not be compatible with |
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* future Swing releases. The current serialization support is |
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* appropriate for short term storage or RMI between applications running |
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* the same version of Swing. As of 1.4, support for long term storage |
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* of all JavaBeans<sup><font size="-2">TM</font></sup> |
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* has been added to the <code>java.beans</code> package. |
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* Please see {@link java.beans.XMLEncoder}. |
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* |
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* @author Dave Moore |
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*/ |
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public class DefaultSingleSelectionModel implements SingleSelectionModel, |
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Serializable { |
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/* Only one ModelChangeEvent is needed per model instance since the |
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* event's only (read-only) state is the source property. The source |
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* of events generated here is always "this". |
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*/ |
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protected transient ChangeEvent changeEvent = null; |
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/** The collection of registered listeners */ |
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protected EventListenerList listenerList = new EventListenerList(); |
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private int index = -1; |
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// implements javax.swing.SingleSelectionModel |
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public int getSelectedIndex() { |
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return index; |
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} |
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// implements javax.swing.SingleSelectionModel |
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public void setSelectedIndex(int index) { |
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if (this.index != index) { |
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this.index = index; |
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fireStateChanged(); |
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} |
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} |
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// implements javax.swing.SingleSelectionModel |
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public void clearSelection() { |
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setSelectedIndex(-1); |
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} |
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// implements javax.swing.SingleSelectionModel |
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public boolean isSelected() { |
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boolean ret = false; |
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if (getSelectedIndex() != -1) { |
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ret = true; |
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} |
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return ret; |
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} |
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/** |
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* Adds a <code>ChangeListener</code> to the button. |
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*/ |
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public void addChangeListener(ChangeListener l) { |
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listenerList.add(ChangeListener.class, l); |
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} |
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/** |
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* Removes a <code>ChangeListener</code> from the button. |
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*/ |
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public void removeChangeListener(ChangeListener l) { |
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listenerList.remove(ChangeListener.class, l); |
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} |
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/** |
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* Returns an array of all the change listeners |
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* registered on this <code>DefaultSingleSelectionModel</code>. |
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* |
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* @return all of this model's <code>ChangeListener</code>s |
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* or an empty |
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* array if no change listeners are currently registered |
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* |
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* @see #addChangeListener |
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* @see #removeChangeListener |
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* |
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* @since 1.4 |
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*/ |
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public ChangeListener[] getChangeListeners() { |
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15e81207e1f2
6727662: Code improvement and warnings removing from swing packages
rupashka
parents:
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diff
changeset
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return listenerList.getListeners(ChangeListener.class); |
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} |
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/** |
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* Notifies all listeners that have registered interest for |
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* notification on this event type. The event instance |
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* is created lazily. |
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* @see EventListenerList |
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*/ |
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protected void fireStateChanged() { |
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// Guaranteed to return a non-null array |
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Object[] listeners = listenerList.getListenerList(); |
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// Process the listeners last to first, notifying |
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// those that are interested in this event |
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for (int i = listeners.length-2; i>=0; i-=2) { |
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if (listeners[i]==ChangeListener.class) { |
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// Lazily create the event: |
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if (changeEvent == null) |
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changeEvent = new ChangeEvent(this); |
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((ChangeListener)listeners[i+1]).stateChanged(changeEvent); |
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} |
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} |
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} |
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/** |
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* Returns an array of all the objects currently registered as |
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* <code><em>Foo</em>Listener</code>s |
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* upon this model. |
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* <code><em>Foo</em>Listener</code>s |
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* are registered using the <code>add<em>Foo</em>Listener</code> method. |
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* <p> |
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* You can specify the <code>listenerType</code> argument |
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* with a class literal, such as <code><em>Foo</em>Listener.class</code>. |
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* For example, you can query a <code>DefaultSingleSelectionModel</code> |
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* instance <code>m</code> |
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* for its change listeners |
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* with the following code: |
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* |
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* <pre>ChangeListener[] cls = (ChangeListener[])(m.getListeners(ChangeListener.class));</pre> |
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* |
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* If no such listeners exist, |
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* this method returns an empty array. |
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* |
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* @param listenerType the type of listeners requested; |
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* this parameter should specify an interface |
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* that descends from <code>java.util.EventListener</code> |
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* @return an array of all objects registered as |
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* <code><em>Foo</em>Listener</code>s |
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* on this model, |
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* or an empty array if no such |
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* listeners have been added |
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* @exception ClassCastException if <code>listenerType</code> doesn't |
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* specify a class or interface that implements |
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* <code>java.util.EventListener</code> |
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* |
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* @see #getChangeListeners |
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* |
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* @since 1.3 |
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*/ |
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public <T extends EventListener> T[] getListeners(Class<T> listenerType) { |
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return listenerList.getListeners(listenerType); |
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} |
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} |