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authorupstream source tree <ports@midipix.org>2015-03-15 20:14:05 -0400
committerupstream source tree <ports@midipix.org>2015-03-15 20:14:05 -0400
commit554fd8c5195424bdbcabf5de30fdc183aba391bd (patch)
tree976dc5ab7fddf506dadce60ae936f43f58787092 /libjava/classpath/javax/swing/AbstractSpinnerModel.java
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+/* 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);
+ }
+}