/*
* org.openmicroscopy.shoola.util.ui.lens.ZoomBIPanel
*
*------------------------------------------------------------------------------
* Copyright (C) 2006-2009 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.util.ui.lens;
//Java imports
import java.awt.Color;
import java.awt.Graphics;
import java.awt.image.BufferedImage;
import javax.swing.JPanel;
//Third-party libraries
//Application-internal dependencies
/**
* Shows the zoomed image of the lens, in the centre of the UI.
*
* @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>
* @since 3.0-Beta4
*/
class ZoomBIPanel
extends JPanel
{
/** Used to clear the background of the panel. */
private final static Color CLEAR_COLOUR = new Color(0, 0, 0, 255);
/** Reference to the model. */
private LensModel model;
/**
* Creates a new instance.
*
* @param model Reference to the model.
*/
ZoomBIPanel(LensModel model)
{
this.model = model;
setOpaque(true);
}
/**
* Overridden to draw the zoomed image and the current position of the lens
* on the canvas.
* @see java.awt.Component#paint(java.awt.Graphics)
*/
public void paint(Graphics g)
{
int w = this.getWidth();
int h = this.getHeight();
BufferedImage img = model.getZoomedImage();
if (img == null) return;
g.setColor(CLEAR_COLOUR);
g.fillRect(0, 0, w, h);
int x = (w/2)-img.getWidth()/2;
int y = (h/2)-img.getHeight()/2;
g.drawImage(img, x, y, img.getWidth(), img.getHeight(), null);
}
}