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Groups > comp.lang.java.programmer > #28062

Re: Mirror an image

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In article <lhsj1p$i60$1@dont-email.me>, Jeff Higgins 
(jeff@invalid.invalid) says...
> 
> On 04/06/2014 02:18 PM, Wanja Gayk wrote:
> > Without any test, this would be my first, rough idea:
> > Have fun.
> 
> 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;

//you don't need to store the width and the height here, just get it 
//again in the paint method.
//the less variables/fields you have to track in your mind the code, the 
//better you will be able to read it later.

>    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();

//you should set a clip here, so you don't need to paint the image in 
//full height.

>      g2d.drawRenderedImage(image, null);
>      g2d.translate(0, 2 * height);
>      g2d.scale(1, -1);
>      g2d.drawRenderedImage(image, null);
>      g2d.setTransform(restore);
>    }

//note: using g.drawImage(img, x,y,w,h,.. ) you could 
//automatically scale the image to the panel size, which may come handy. 

Kind regards,
Wanja

-- 
..Alesi's problem was that the back of the car was jumping up and down 
dangerously - and I can assure you from having been teammate to 
Jean Alesi and knowing what kind of cars that he can pull up with, 
when Jean Alesi says that a car is dangerous - it is. [Jonathan Palmer]

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Thread

Mirror an image pgmbento93@gmail.com - 2014-04-01 07:44 -0700
  Re: Mirror an image Jeff Higgins <jeff@invalid.invalid> - 2014-04-01 11:09 -0400
    Re: Mirror an image Jeff Higgins <jeff@invalid.invalid> - 2014-04-01 11:15 -0400
  Re: Mirror an image Roedy Green <see_website@mindprod.com.invalid> - 2014-04-01 11:56 -0700
    Re: Mirror an image Wanja Gayk <brixomatic@yahoo.com> - 2014-04-06 20:18 +0200
      Re: Mirror an image Jeff Higgins <jeff@invalid.invalid> - 2014-04-06 18:01 -0400
        Re: Mirror an image Wanja Gayk <brixomatic@yahoo.com> - 2014-04-13 15:57 +0200
          Re: Mirror an image Jeff Higgins <jeff@invalid.invalid> - 2014-04-13 10:21 -0400

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