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/**
* Copyright (c) 2009 Bestsolution.at and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Common Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/cpl-v10.html
*
* Contributors:
* Tom Schindl<tom.schindl@bestsolution.at> - Initial API and implementation
*/
package org.eclipse.emf.example.databinding.project.ui.rcp.databinding;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import org.eclipse.core.databinding.conversion.Converter;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.widgets.Display;
import org.eclipse.emf.ecore.xml.type.XMLTypeFactory;
import org.eclipse.emf.example.databinding.project.ui.rcp.Activator;
/**
* Converter which able to convert base64 encoded values into SWT-images.
* The convert remembers the last created image and disposes when a new one is allocated but the
* last image set on the control has to be disposed by the control itself
*/
public class Base64ToImageConverter extends Converter
{
private Image lastImage;
private Display display;
/**
* Create a new converter
* @param display the display the images are created on
*/
public Base64ToImageConverter(Display display)
{
super(String.class, Image.class);
this.display = display;
}
public Object convert(Object fromObject)
{
if (lastImage != null && !lastImage.isDisposed())
{
lastImage.dispose();
lastImage = null;
}
if (fromObject != null)
{
ByteArrayInputStream in = new ByteArrayInputStream(XMLTypeFactory.eINSTANCE.createBase64Binary(fromObject.toString()));
Image img = new Image(display, in);
try
{
in.close();
}
catch (IOException e)
{
Activator.getDefault().log(e);
}
lastImage = img;
return img;
}
return null;
}
}
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