124 lines
3.8 KiB
Java
124 lines
3.8 KiB
Java
/* 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);
|
|
}
|
|
}
|