best way of handling images in Java

secprovider · 09-22-2003, 07:28 AM

Hi,

I need a way of handling images in Java. What I want to do is as follows?

I have a number of images. Probably I need to put each of them inside a panel. Each panel will have two images. So when you click on the panel the first image is shown, when you click again, the other images is shown. First image is same for all panels. 2nd images differ from panel to panel and I should keep track of each 2nd image inside panels.
One more thing, when switching from first image to second, some animation would be great. What is the basic way to handle such kind of images?

I did this way, but this is not suitable. Put the images inside JLabel and JLabel inside JPanel.

Looking_Lost · 09-22-2003, 04:22 PM

Sounds a bit like a deck of cards what you've got, a simple way to do it is override an existing class, its paint method and preferred size, such as JButton. I actually did use overrode the JButton class for a simple card game. The class below works best if both images are the same size or the first image displayed is the largest though it could be rewritten. For simple animation guess you could just create an array with each animation image in it and display them alternatively, though admittedly I'm no Walt Disney.

Code:

import javax.swing.*;
import java.awt.event.*;
import java.awt.*;


public class ImageFlip extends JButton implements ActionListener
{
    
   private Dimension picSize;

   private boolean isFaceUp=false;

   private  Image front,back;
 
  
   public ImageFlip(Image im1,Image im2)
   {

    front=im1;
    back=im2;
    
    picSize=new Dimension(front.getWidth(this),front.getHeight(this));
  
    this.setPreferredSize(picSize);
    this.setBorderPainted(false);
 

    addActionListener(this);   

    }
   
      
    public void actionPerformed(ActionEvent ae)
       {

          repaint();
             
          isFaceUp= ! isFaceUp;

             }
         

   public Dimension getPrefferedSize()
   {


    return picSize;
    

   }


  public void paint(Graphics g)
  {

   super.paint(g);


   if(isFaceUp)
     g.drawImage(back,0,0,this);
   else
     g.drawImage(front,0,0,this);


   }    

}