org.fife.ui.ImagePreviewPane Maven / Gradle / Ivy
/*
* 11/14/2003
*
* ImagePreviewPane.java - An accessory for JFileChoosers that displays a
* preview of image (gif, png or jpg) files.
* Copyright (C) 2003 Robert Futrell
* http://fifesoft.com/rtext
* Licensed under a modified BSD license.
* See the included license file for details.
*/
package org.fife.ui;
import java.awt.Dimension;
import java.awt.GridLayout;
import java.awt.Image;
import java.beans.PropertyChangeEvent;
import java.beans.PropertyChangeListener;
import java.io.File;
import java.io.IOException;
import javax.imageio.ImageIO;
import javax.swing.BorderFactory;
import javax.swing.ImageIcon;
import javax.swing.JComponent;
import javax.swing.JFileChooser;
import javax.swing.JLabel;
/**
* An accessory panel for javax.swing.JFileChoosers that are used
* for picking image files (gif, png or
* jpg). The panel displays a "preview" of the currently selected
* image.
*
* @author Robert Futrell
* @version 1.0
*/
public class ImagePreviewPane extends JComponent
implements PropertyChangeListener {
private static final long serialVersionUID = 1L;
private JLabel imageLabel;
private static final int WIDTH = 120;
private static final int HEIGHT = WIDTH;
/**
* Creates a new ImagePreviewPane.
*/
public ImagePreviewPane() {
setLayout(new GridLayout(1,1));
setBorder(BorderFactory.createTitledBorder("Preview"));
imageLabel = new JLabel();
imageLabel.setPreferredSize(new Dimension(WIDTH,HEIGHT));
add(imageLabel);
}
/**
* Listens for when the user selects a new file in the parent
* javax.swing.JFileChooser.
*/
public void propertyChange(PropertyChangeEvent e) {
String propName = e.getPropertyName();
if (JFileChooser.SELECTED_FILE_CHANGED_PROPERTY.equals(propName)) {
File file = (File)e.getNewValue();
if (file!=null) {
ImageIcon icon = null;
try {
Image image = ImageIO.read(file);
if (image!=null) {
image = image.getScaledInstance(WIDTH,HEIGHT,
Image.SCALE_DEFAULT);
icon = new ImageIcon(image);
}
} catch (IOException ioe) {
ioe.printStackTrace();
}
imageLabel.setIcon(icon);
repaint();
}
}
}
}