/*
* (c) Copyright 2010-2011 AgileBirds
*
* This file is part of OpenFlexo.
*
* OpenFlexo 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 3 of the License, or
* (at your option) any later version.
*
* OpenFlexo 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 OpenFlexo. If not, see <http://www.gnu.org/licenses/>.
*
*/
package org.openflexo.swing;
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;
/* ImagePreview.java by FileChooserDemo2.java. */
public class ImagePreview extends JComponent implements PropertyChangeListener {
ImageIcon thumbnail = null;
File file = null;
public ImagePreview(JFileChooser fc) {
setPreferredSize(new Dimension(100, 50));
fc.addPropertyChangeListener(this);
}
public void loadImage() {
if (file == null) {
thumbnail = null;
return;
}
// Don't use createImageIcon (which is a wrapper for getResource)
// because the image we're trying to load is probably not one
// of this program's own resources.
ImageIcon tmpIcon = new ImageIcon(file.getPath());
if (tmpIcon != null) {
if (tmpIcon.getIconWidth() > 90) {
thumbnail = new ImageIcon(tmpIcon.getImage().getScaledInstance(90, -1, Image.SCALE_DEFAULT));
} else { // no need to miniaturize
thumbnail = tmpIcon;
}
}
}
@Override
public void propertyChange(PropertyChangeEvent e) {
boolean update = false;
String prop = e.getPropertyName();
// If the directory changed, don't show an image.
if (JFileChooser.DIRECTORY_CHANGED_PROPERTY.equals(prop)) {
file = null;
update = true;
// If a file became selected, find out which one.
} else if (JFileChooser.SELECTED_FILE_CHANGED_PROPERTY.equals(prop)) {
file = (File) e.getNewValue();
update = true;
}
// Update the preview accordingly.
if (update) {
thumbnail = null;
if (isShowing()) {
loadImage();
repaint();
}
}
}
@Override
protected 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);
}
}
}