/**
 * Copyright (c) 2009 Juwi MacMillan Group GmbH
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *         http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package de.juwimm.cms.content.frame.helper;

import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.Image;
import java.beans.PropertyChangeEvent;
import java.beans.PropertyChangeListener;
import java.io.File;

import javax.swing.ImageIcon;
import javax.swing.JComponent;
import javax.swing.JFileChooser;

/**
 * <p>Title: </p>
 * <p>Description: </p>
 * <p>Copyright: Copyright (c) 2002</p>
 * <p>Company: </p>
 * @author <a href="mailto:s.kulawik@juwimm.com">Sascha-Matthias Kulawik</a>
 * @version $Id$
 */
public class ImagePreview extends JComponent implements PropertyChangeListener {
	private ImageIcon thumbnail = null;
	private File file = null;

	public ImagePreview(JFileChooser fc) {
		setPreferredSize(new Dimension(100, 50));
		fc.addPropertyChangeListener(this);
	}

	public void loadImage() {
		if (file == null) { return; }

		ImageIcon tmpIcon = new ImageIcon(file.getPath());
		if (tmpIcon.getIconWidth() > 90) {
			thumbnail = new ImageIcon(tmpIcon.getImage().getScaledInstance(90, -1, Image.SCALE_DEFAULT));
		} else {
			thumbnail = tmpIcon;
		}
	}

	public void propertyChange(PropertyChangeEvent e) {
		String prop = e.getPropertyName();
		if (prop.equals(JFileChooser.SELECTED_FILE_CHANGED_PROPERTY)) {
			file = (File) e.getNewValue();
			if (isShowing()) {
				loadImage();
				repaint();
			}
		}
	}

	public void paintComponent(Graphics g) {
		if (thumbnail == null) {
			loadImage();
		}

		if (thumbnail != null) {
			int x = getWidth() / 2 - thumbnail.getIconWidth() / 2;
			int y = getHeight() / 2 - thumbnail.getIconHeight() / 2;

			if (y < 0) {
				y = 0;
			}

			if (x < 5) {
				x = 5;
			}
			thumbnail.paintIcon(this, g, x, y);
		}
	}
}