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/*
* Distributed as part of mchange-commons-java 0.2.6.3
*
* Copyright (C) 2013 Machinery For Change, Inc.
*
* Author: Steve Waldman
*
* This library is free software; you can redistribute it and/or modify
* it under the terms of EITHER:
*
* 1) The GNU Lesser General Public License (LGPL), version 2.1, as
* published by the Free Software Foundation
*
* OR
*
* 2) The Eclipse Public License (EPL), version 1.0
*
* You may choose which license to accept if you wish to redistribute
* or modify this work. You may offer derivatives of this work
* under the license you have chosen, or you may provide the same
* choice of license which you have been offered here.
*
* This software 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.
*
* You should have received copies of both LGPL v2.1 and EPL v1.0
* along with this software; see the files LICENSE-EPL and LICENSE-LGPL.
* If not, the text of these licenses are currently available at
*
* LGPL v2.1: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html
* EPL v1.0: http://www.eclipse.org/org/documents/epl-v10.php
*
*/
package com.mchange.v2.beans.swing;
import java.awt.*;
import java.awt.event.*;
import java.beans.*;
import java.lang.reflect.*;
import java.util.*;
import javax.swing.*;
import com.mchange.v2.beans.BeansUtils;
public class PropertyBoundComboBox extends JComboBox
{
PropertyComponentBindingUtility pcbu;
MyHbi myHbi;
Object itemsSrc = null;
Object nullObject = null;
/**
* @param itemsSrc can be an Object[], a Collection, or a ComboBoxModel
* @param nullObject if a non-null value is provided, this object will stand-in for
* a null-value on the bound property.
*/
public PropertyBoundComboBox( Object bean, String propName, Object itemsSrc, Object nullObject )
throws IntrospectionException
{
super();
this.myHbi = new MyHbi();
this.pcbu = new PropertyComponentBindingUtility( myHbi, bean, propName, false );
this.nullObject = nullObject;
setItemsSrc( itemsSrc );
}
public Object getItemsSrc()
{ return itemsSrc; }
public void setItemsSrc(Object itemsSrc)
{
// we added this suspend/resume logic because we were seeing spurious "selections"
// while modifying the list
myHbi.suspendNotifications();
this.removeAllItems();
if (itemsSrc instanceof Object[])
{
Object[] oa = (Object[]) itemsSrc;
for (int i = 0, len = oa.length; i < len; ++i)
this.addItem( oa[i] );
}
else if (itemsSrc instanceof Collection)
{
Collection c = (Collection) itemsSrc;
for (Iterator ii = c.iterator(); ii.hasNext(); )
this.addItem( ii.next() );
}
else if (itemsSrc instanceof ComboBoxModel)
{ this.setModel( (ComboBoxModel) itemsSrc ); }
else
throw new IllegalArgumentException("itemsSrc must be an Object[], a Collection, or a ComboBoxModel");
this.itemsSrc = itemsSrc;
pcbu.resync();
myHbi.resumeNotifications();
}
public void setNullObject(Object o)
{
this.nullObject = null;
pcbu.resync();
}
public Object getNullObject()
{ return nullObject; }
class MyHbi implements HostBindingInterface
{
boolean suspend_notice = false;
public void suspendNotifications()
{ suspend_notice = true; }
public void resumeNotifications()
{ suspend_notice = false; }
public void syncToValue( PropertyEditor editor, Object newVal )
{
if (newVal == null)
setSelectedItem( nullObject );
else
setSelectedItem( newVal );
}
public void addUserModificationListeners()
{
ItemListener isl = new ItemListener()
{
public void itemStateChanged( ItemEvent evt )
{
if (! suspend_notice)
pcbu.userModification();
}
};
addItemListener( isl );
}
public Object fetchUserModification( PropertyEditor editor, Object oldValue )
{
Object out = getSelectedItem();
if (nullObject != null && nullObject.equals( out ))
out = null;
return out;
}
public void alertErroneousInput()
{ getToolkit().beep(); }
};
public static void main( String[] argv )
{
try
{
TestBean tb = new TestBean();
PropertyChangeListener pcl = new PropertyChangeListener()
{
public void propertyChange( PropertyChangeEvent evt )
{ BeansUtils.debugShowPropertyChange( evt ); }
};
tb.addPropertyChangeListener( pcl );
JComboBox jcb1 = new PropertyBoundComboBox( tb, "theString", new String[] {"SELECT", "Frog", "Fish", "Puppy"}, "SELECT" );
JTextField jt2 = new PropertyBoundTextField( tb, "theInt", 5);
JTextField jt3 = new PropertyBoundTextField( tb, "theFloat", 5 );
JFrame frame = new JFrame();
BoxLayout bl = new BoxLayout( frame.getContentPane(), BoxLayout.Y_AXIS );
frame.getContentPane().setLayout( bl );
frame.getContentPane().add( jcb1 );
frame.getContentPane().add( jt2 );
frame.getContentPane().add( jt3 );
frame.pack();
frame.show();
}
catch ( Exception e )
{ e.printStackTrace(); }
}
}
