Resizing Icon for a button(urgent)

[Sham Grandhe]

Hi Friends,
Iam presently working on a swings project and want to resize an Icon that is being placed on a button or a label. can some one plz help to do this.

Thank you

regards
sham

[Craig Wood]

import java.awt.*;
import java.awt.event.*;
import java.awt.geom.AffineTransform;
import java.awt.image.BufferedImage;
import java.io.*;
import java.net.*;
import java.util.Random;
import javax.imageio.ImageIO;
import javax.swing.*;
 
public class IconResizeTest
{
    JButton[] buttons;
    Random seed;
    BufferedImage[] images;     // assuming all images
    int origWidth, origHeight;  // have same dimensions
 
    public IconResizeTest()
    {
        buttons = new JButton[3];
        seed = new Random();
        loadImages();
        origWidth = images[0].getWidth();
        origHeight = images[0].getHeight();
        JFrame f = new JFrame();
        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        f.getContentPane().add(getNorthPanel(images[0]), "North");
        f.getContentPane().add(getSouthPanel(images[1], images[2]), "South");
        f.setSize(400,275);
        f.setLocation(200,200);
        f.setVisible(true);
    }
 
    private void resizeIcons()
    {
        for(int j = 0; j < images.length; j++)
        {
            BufferedImage resized = resizeImage(images[j]);
            buttons[j].setIcon(new ImageIcon(resized));
            buttons[j].getParent().validate();
            buttons[j].getParent().repaint();
        }
    }
 
    private BufferedImage resizeImage(BufferedImage in)
    {
        double scale = (20 + seed.nextInt(81))/100.0;   // 20% -> 100%
        int w = (int)(origWidth * scale);
        int h = (int)(origHeight * scale);
        //System.out.println("scale = " + scale + "\tw = " + w + "\th = " + h);
        BufferedImage out = new BufferedImage(w, h, in.getType());
        Graphics2D g2 = out.createGraphics();
        g2.setRenderingHint(RenderingHints.KEY_INTERPOLATION,
                            RenderingHints.VALUE_INTERPOLATION_BICUBIC);
        g2.setPaint(buttons[0].getBackground());
        g2.fillRect(0, 0, w, h);
        AffineTransform at = AffineTransform.getScaleInstance(scale, scale);
        g2.drawRenderedImage(in, at);
        g2.dispose();
        return out;
    }
 
    private JPanel getNorthPanel(BufferedImage bi)
    {
        buttons[0] = new JButton(new ImageIcon(bi));
        buttons[0].addActionListener(new ActionListener()
        {
            public void actionPerformed(ActionEvent e)
            {
                resizeIcons();
            }
        });
        JPanel panel = new JPanel();
        panel.add(buttons[0]);
        return panel;
    }
 
    private JPanel getSouthPanel(BufferedImage bi1, BufferedImage bi2)
    {
        buttons[1] = new JButton(new ImageIcon(bi1));
        buttons[2] = new JButton(new ImageIcon(bi2));
        JPanel panel = new JPanel();
        panel.add(buttons[1]);
        panel.add(buttons[2]);
        return panel;
    }
 
    private void loadImages()
    {
        String prefix = "file:tumbling duke/T";
        int[] ids = { 2, 6, 9 };
        images = new BufferedImage[ids.length];
        for(int j = 0; j < images.length; j++)
            try
            {
                URL url = new URL(prefix + ids[j] + ".gif");
                images[j] = ImageIO.read(url);
            }
            catch(MalformedURLException mue)
            {
                System.err.println("url: " + mue.getMessage());
            }
            catch(IOException ioe)
            {
                System.err.println("read: " + ioe.getMessage());
            }
    }
 
    public static void main(String[] args)
    {
        new IconResizeTest();
    }
}

[Sham Grandhe]

hi Craig Wood,
Thank you, your example will help me a lot.

regards
sham