/*
* org.openmicroscopy.shoola.agents.metadata.rnd.PreviewCanvas
*
*------------------------------------------------------------------------------
* Copyright (C) 2006-2015 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.metadata.rnd;
//Java imports
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.image.BufferedImage;
import javax.swing.JPanel;
//Third-party libraries
//Application-internal dependencies
import org.openmicroscopy.shoola.agents.imviewer.util.ImagePaintingFactory;
import org.openmicroscopy.shoola.util.image.geom.Factory;
/**
* Component displaying the preview image.
*
* @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 3.0-Beta4
*/
class PreviewCanvas
extends JPanel
{
/** The image to paint. */
private BufferedImage image;
/** Flag indicating if interpolation is used */
private boolean interpolate = true;
/** Creates a new instance. */
PreviewCanvas()
{
setDoubleBuffered(true);
}
/**
* Sets the image to paint.
*
* @param image The value to set.
*/
void setImage(BufferedImage image)
{
this.image = image;
repaint();
}
/**
* Sets the interpolation flag
*
* @param interpolate
* Pass <code>false</code> to disable interpolation (enabled by
* default)
*/
public void setInterpolate(boolean interpolate) {
this.interpolate = interpolate;
}
/**
* Overridden to paint the image.
* @see javax.swing.JComponent#paintComponent(Graphics)
*/
public void paintComponent(Graphics g)
{
if (image == null)
return;
Dimension d = getSize();
double xFactor = (double)d.width/(double)image.getWidth();
double yFactor = (double)d.height/(double)image.getHeight();
double factor = xFactor < yFactor ? xFactor : yFactor;
BufferedImage scaledImage = Factory.magnifyImage(image, factor, 0, interpolate);
int x = (d.width - scaledImage.getWidth()) / 2;
int y = (d.height - scaledImage.getHeight()) / 2;
Graphics2D g2D = (Graphics2D) g;
// paint the background
g2D.setColor(getBackground());
g2D.fillRect(0, 0, getWidth(), getHeight());
g2D.setColor(getForeground());
// paint the image
ImagePaintingFactory.setGraphicRenderingSettings(g2D, interpolate);
g2D.drawImage(scaledImage, null, x, y);
g2D.dispose();
}
}