ThumbnailTools.java Source code

Introduction

Here is the source code for ThumbnailTools.java

Source

//package org.imogene.web.server.util;

import java.awt.Graphics;
import java.awt.Image;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;

import javax.imageio.ImageIO;
import javax.swing.ImageIcon;

public class ThumbnailTools {

    public static final int VERTICAL = 0;
    public static final int HORIZONTAL = 1;

    public static final String IMAGE_JPEG = "jpeg";
    public static final String IMAGE_JPG = "jpg";
    public static final String IMAGE_PNG = "png";

    private ImageIcon image;
    private ImageIcon thumb;

    public ThumbnailTools(Image pImage) {
        image = new ImageIcon(pImage);
    }

    public ThumbnailTools(String fileName) {
        image = new ImageIcon(fileName);
    }

    /**
     * Create a thumbnail for the current image
     * @param size the size
     * @param dir the direction, Horizontal or Vertical
     * @return the thumbnail image
     */
    public Image getThumbnail(int size, int dir) {
        if (dir == HORIZONTAL) {
            thumb = new ImageIcon(image.getImage().getScaledInstance(size, -1, Image.SCALE_SMOOTH));
        } else {
            thumb = new ImageIcon(image.getImage().getScaledInstance(-1, size, Image.SCALE_SMOOTH));
        }
        return thumb.getImage();
    }

    /**
     * Create a thumbnail for the current image
     * @param size the size
     * @param dir the direction, Horizontal or Vertical
     * @param scale the scale
     * @return the thumbnail image
     */
    public Image getThumbnail(int size, int dir, int scale) {
        if (dir == HORIZONTAL) {
            thumb = new ImageIcon(image.getImage().getScaledInstance(size, -1, scale));
        } else {
            thumb = new ImageIcon(image.getImage().getScaledInstance(-1, size, scale));
        }
        return thumb.getImage();
    }

    /**
     * Save the thumbnail to the specified file, with the specified type
     * @param file the file
     * @param imageType the image type
     */
    public void saveThumbnail(File file, String imageType) {
        if (thumb != null) {
            BufferedImage bi = new BufferedImage(thumb.getIconWidth(), thumb.getIconHeight(),
                    BufferedImage.TYPE_INT_RGB);
            Graphics g = bi.getGraphics();
            g.drawImage(thumb.getImage(), 0, 0, null);
            try {
                ImageIO.write(bi, imageType, file);
            } catch (IOException ioe) {
                throw new RuntimeException("Error occured saving thumbnail");
            }
        } else {
            throw new RuntimeException("Thumbnail have to be created before.");
        }
    }

}