uk.org.retep.swing.model.EnumModel Maven / Gradle / Ivy
/*
* Copyright (c) 1998-2010, Peter T Mount
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* - Neither the name of the retep.org.uk nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
*
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
* OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package uk.org.retep.swing.model;
import java.awt.Color;
import java.awt.Component;
import java.awt.Graphics2D;
import java.awt.RenderingHints;
import java.awt.image.BufferedImage;
import java.util.HashMap;
import java.util.Map;
import javax.swing.ImageIcon;
import javax.swing.JLabel;
import javax.swing.JList;
import javax.swing.ListCellRenderer;
/**
* A ComboBoxModel that displays values of an enum
*
* @param Enum implementing EnumModel.Renderable used to view
* @author peter
*/
public class EnumModel
extends AbstractModel
{
private T values[];
/** Creates a new instance of ColorModel
* @param values The enum values to include
*/
public EnumModel( final T values[] )
{
this( values, values[0] );
}
/** Creates a new instance of ColorModel
* @param values The enum values to include
* @param defaultValue The default value
*/
public EnumModel( final T values[], final T defaultValue )
{
super( defaultValue );
this.values = values;
}
@SuppressWarnings( "unchecked" )
@Override
public ListCellRenderer getRenderer()
{
return new EnumRenderer( getDefaultValue() );
}
/**
* Returns the length of the list.
* @return the length of the list
*/
@Override
public int getSize()
{
return values.length;
}
/**
* Returns the value at the specified index.
* @param index the requested index
* @return the value at index
*/
@Override
public Object getElementAt( int index )
{
return values[index];
}
public Object select( String name )
{
Object selected = null;
if( name != null )
{
for( T v : values )
{
if( name.equals( v.toString() ) )
{
selected = v;
break;
}
}
}
return selected;
}
private class EnumRenderer
extends JLabel
implements ListCellRenderer
{
static final long serialVersionUID = -7200159879726204139L;
private Map cache = new HashMap();
/** Creates a new instance of JoinEndRenderer */
public EnumRenderer( EnumModel.Renderable defaultValue )
{
setOpaque( false );
for( T value : values )
{
BufferedImage img = new BufferedImage( 20, 20,
BufferedImage.TYPE_3BYTE_BGR );
Graphics2D g = img.createGraphics();
try
{
// They tend to look better antialiased
g.setRenderingHint( RenderingHints.KEY_ANTIALIASING,
RenderingHints.VALUE_ANTIALIAS_ON );
g.setColor( Color.white );
g.fillRect( 0, 0, 20, 20 );
g.setBackground( Color.white );
g.setColor( Color.black );
value.render( g, 20, 20 );
}
finally
{
g.dispose();
}
cache.put( value, new ImageIcon( img ) );
}
}
@SuppressWarnings( "unchecked" )
private T getValue( Object value )
{
return (T) value;
}
@Override
public Component getListCellRendererComponent(
JList list,
Object value,
int index,
boolean isSelected,
boolean cellHasFocus )
{
if( value == null )
{
setText( "" );
setIcon( null );
}
else
{
T end = getValue( value );
setText( end.getDescription() );
setIcon( cache.get( end ) );
}
return this;
}
}
public static interface Renderable
{
String getDescription();
void render( Graphics2D g, int w, int h );
}
}