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author | upstream source tree <ports@midipix.org> | 2015-03-15 20:14:05 -0400 |
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committer | upstream source tree <ports@midipix.org> | 2015-03-15 20:14:05 -0400 |
commit | 554fd8c5195424bdbcabf5de30fdc183aba391bd (patch) | |
tree | 976dc5ab7fddf506dadce60ae936f43f58787092 /libjava/classpath/javax/swing/AbstractSpinnerModel.java | |
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Diffstat (limited to 'libjava/classpath/javax/swing/AbstractSpinnerModel.java')
-rw-r--r-- | libjava/classpath/javax/swing/AbstractSpinnerModel.java | 123 |
1 files changed, 123 insertions, 0 deletions
diff --git a/libjava/classpath/javax/swing/AbstractSpinnerModel.java b/libjava/classpath/javax/swing/AbstractSpinnerModel.java new file mode 100644 index 000000000..984e52af2 --- /dev/null +++ b/libjava/classpath/javax/swing/AbstractSpinnerModel.java @@ -0,0 +1,123 @@ +/* AbstractSpinnerModel.java -- + Copyright (C) 2004, 2006, Free Software Foundation, Inc. + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath 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 for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + + +package javax.swing; + +import java.util.EventListener; + +import javax.swing.event.ChangeEvent; +import javax.swing.event.ChangeListener; +import javax.swing.event.EventListenerList; + +/** + * Provides standard implementations for some of the methods in + * {@link SpinnerModel}. + * + * @since 1.4 + * + * @author Ka-Hing Cheung + */ +public abstract class AbstractSpinnerModel implements SpinnerModel +{ + private ChangeEvent changeEvent = new ChangeEvent(this); + + /** Stores the listeners registered with the model. */ + protected EventListenerList listenerList = new EventListenerList(); + + /** + * Creates an <code>AbstractSpinnerModel</code>. + */ + public AbstractSpinnerModel() + { + // Nothing to do here. + } + + /** + * Registers a <code>ChangeListener</code> with the model so that it will + * receive {@link ChangeEvent} notifications when the model changes. + * + * @param listener the listener to add (<code>null</code> is ignored). + */ + public void addChangeListener(ChangeListener listener) + { + listenerList.add(ChangeListener.class, listener); + } + + /** + * Gets all the listeners that are of a particular type. + * + * @param c the type of listener + * @return the listeners that are of the specific type + */ + public <T extends EventListener> T[] getListeners(Class<T> c) + { + return listenerList.getListeners(c); + } + + /** + * Gets all the <code>ChangeListener</code>s. + * + * @return all the <code>ChangeListener</code>s + */ + public ChangeListener[] getChangeListeners() + { + return (ChangeListener[]) listenerList.getListeners(ChangeListener.class); + } + + /** + * Remove a particular listener. + * + * @param listener the listener to remove + */ + public void removeChangeListener(ChangeListener listener) + { + listenerList.remove(ChangeListener.class, listener); + } + + /** + * Fires a <code>ChangeEvent</code> to all the <code>ChangeListener</code>s + * added to this model + */ + protected void fireStateChanged() + { + ChangeListener[] listeners = getChangeListeners(); + + for (int i = 0; i < listeners.length; ++i) + listeners[i].stateChanged(changeEvent); + } +} |