/*
* org.openmicroscopy.shoola.agents.dataBrowser.browser.ThumbnailCanvas
*
*------------------------------------------------------------------------------
* Copyright (C) 2006-2008 University of Dundee. All rights reserved.
*
*
* This program 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 of the License, or
* (at your option) any later version.
* This program 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 this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
*------------------------------------------------------------------------------
*/
package org.openmicroscopy.shoola.agents.dataBrowser.browser;
//Java imports
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.image.BufferedImage;
import javax.swing.JPanel;
//Third-party libraries
//Application-internal dependencies
/**
* Customizes <code>JPanel</code> to paint an image on an {@link ImageNode}.
*
*
* @author Jean-Marie Burel
* <a href="mailto:j.burel@dundee.ac.uk">j.burel@dundee.ac.uk</a>
* @author Donald MacDonald
* <a href="mailto:donald@lifesci.dundee.ac.uk">donald@lifesci.dundee.ac.uk</a>
* @version 3.0
* <small>
* (<b>Internal version:</b> $Revision: $Date: $)
* </small>
* @since OME3.0
*/
class ThumbnailCanvas
extends JPanel
{
/** The node for which we're painting the image. */
private ImageNode imageFrame;
/**
* Creates a new instance.
*
* @param node The node on which the image is painted.
* Mustn't be <code>null</code>.
*/
ThumbnailCanvas(ImageNode node)
{
if (node == null) throw new NullPointerException("No image node.");
imageFrame = node;
setDoubleBuffered(true);
}
/**
* Overridden to paint the image.
* @see javax.swing.JComponent#paintComponent(Graphics)
*/
public void paintComponent(Graphics g)
{
super.paintComponent(g);
Thumbnail thumb = imageFrame.getThumbnail();
BufferedImage img = thumb.getDisplayedImage();
if (img == null) return;
((Graphics2D) g).drawImage(img, null, 0, 0);
}
}