Re: Mirror an image

On 04/06/2014 02:18 PM, Wanja Gayk wrote:


Thanks.
Here's another, not exactly per my first post
but the must be 25 ways of doing this task.

package scratch;

import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.geom.AffineTransform;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;

import javax.imageio.ImageIO;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.JScrollPane;

@SuppressWarnings("serial")
public class Scratch extends JComponent {

   private BufferedImage image;
   private int width, height;

   public Scratch() {
     try {
       image = ImageIO.read(new File("/path/to/image"));
       width = image.getWidth();
       height = image.getHeight();
       setPreferredSize(new Dimension(width, 2 * height));
     } catch (IOException e) {
       e.printStackTrace();
     }
   }

   @Override
   protected void paintComponent(Graphics g) {
     super.paintComponent(g);
     Graphics2D g2d = (Graphics2D) g;
     AffineTransform restore = g2d.getTransform();
     g2d.drawRenderedImage(image, null);
     g2d.translate(0, 2 * height);
     g2d.scale(1, -1);
     g2d.drawRenderedImage(image, null);
     g2d.setTransform(restore);
   }

   public static void main(String[] args) {
     javax.swing.SwingUtilities.invokeLater(new Runnable() {
       public void run() {
         Scratch scratch = new Scratch();
         JScrollPane scroller = new JScrollPane();
         scroller.getViewport().add(scratch);
         JFrame frame = new JFrame("Scratch");
         frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
         frame.add(scroller);
         frame.pack();
         frame.setVisible(true);
       }
     });
   }
}