Buffered Image on JFrame+JDesktopPane

[Ranganath Ranganaths]

hello

Can any one let me know how to display the image for processing it on the JdesktopPane. I want to put the image in IMageBuffer .. and display it on the JDesktopPane.. please help me i am goin crazy

And another problem is that i wanna show the images in thumbnail form as in the acdc s/w (image viewer)... please help me wht to use and how to go about it .. thanks a lot...

Thank you
Ranganath.S

[Aaron Roberts]

Can you clarify what you're trying to do?

Do you want to display an image on the JDesktopPane or are you trying to make an internalframe, that will hold your image?

What type of thumbnails are you trying to do?

Regards,
Aaron R>

[Craig Wood]

There are many ways to put these things together. Maybe this will give you some ideas to help you get started.

import java.awt.*;
import java.awt.event.*;
import java.awt.geom.*;
import java.awt.image.BufferedImage;
import java.io.*;
import java.net.*;
import javax.imageio.ImageIO;
import javax.swing.*;
 
public class BufferedImageTest
{
    public static void main(String[] args)
    {
        BufferedImage[] images = loadImages();
        JInternalFrame iframe = new JInternalFrame("buffered image", true,
                                                   true, true, true);
        BufferedImageComponent imageComponent = new BufferedImageComponent(images[1]);
        iframe.getContentPane().add(new JScrollPane(imageComponent));
        iframe.setSize(350,350);
        iframe.setLocation(25,25);
        iframe.setVisible(true);
        JDesktopPane desktop = new JDesktopPane();
        desktop.add(getThumbnailFrame(images));
        desktop.add(iframe);
        JFrame f = new JFrame();
        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        f.getContentPane().add(desktop);
        f.setSize(400,400);
        f.setLocation(200,200);
        f.setVisible(true);
    }
 
    private static JInternalFrame getThumbnailFrame(BufferedImage[] images)
    {
        Dimension d = new Dimension(75,75);
        JInternalFrame iframe = new JInternalFrame("thumbnails", true,
                                               true, true, true);
        Container cp = iframe.getContentPane();
        cp.setLayout(new GridBagLayout());
        GridBagConstraints gbc = new GridBagConstraints();
        gbc.weightx = 1.0;
        gbc.weighty = 1.0;
        for(int j = 0; j < images.length; j++)
        {
            if(j % 2 == 0)
                gbc.gridwidth = gbc.RELATIVE;
            else
                gbc.gridwidth = gbc.REMAINDER;
            cp.add(new BufferedImageComponent(images[j], d), gbc);
        }
        iframe.setSize(350,350);
        iframe.setLocation(65,65);
        iframe.setVisible(true);
        return iframe;
    }
 
    private static BufferedImage[] loadImages()
    {
        String[] fileNames = {
            "barnowl", "cougar", "redfox", "owls"
        };
        String prefix = "images/";
        String ext = ".jpg";
        BufferedImage[] images = new BufferedImage[fileNames.length];
        for(int j = 0; j < images.length; j++)
            try
            {
                URL url = BufferedImageTest.class.getResource(
                                  prefix + fileNames[j] + ext);
                images[j] = ImageIO.read(url);
            }
            catch(MalformedURLException mue)
            {
                System.out.println("url: " + mue.getMessage());
            }
            catch(IOException ioe)
            {
                System.out.println("read: " + ioe.getMessage());
            }
        return images;
    }
}
 
class BufferedImageComponent extends JPanel
{
    BufferedImage image;
    Dimension size;
    double scale;
 
    public BufferedImageComponent(BufferedImage bi, Dimension d)
    {
        image = bi;
        size = d;
        scaleToFit();
    }
 
    public BufferedImageComponent(BufferedImage bi)
    {
        this(bi, new Dimension(bi.getWidth(), bi.getHeight()));
    }
 
    protected void paintComponent(Graphics g)
    {
        super.paintComponent(g);
        Graphics2D g2 = (Graphics2D)g;
        int w = getWidth();
        int h = getHeight();
        double imageWidth = scale * image.getWidth();
        double imageHeight = scale * image.getHeight();
        double x = (w - imageWidth)/2;
        double y = (h - imageHeight)/2;
        AffineTransform xform = AffineTransform.getTranslateInstance(x,y);
        xform.scale(scale, scale);
        g2.drawRenderedImage(image, xform);
    }
 
    public Dimension getPreferredSize()
    {
        return size;
    }
 
    private void scaleToFit()
    {
        double w = image.getWidth();
        double h = image.getHeight();
        double hScale = size.width / w;
        double vScale = size.height / h;
        scale = Math.min(hScale, vScale);
    }
}

[Ranganath Ranganaths]

Well Thanks alot sir..I will try this one and come back if i face any problem.. Thanks alot for the detail prog..
Ranganath.S