1    package j2d.rotator; 
2     
3    import gui.ClosableJFrame; 
4    import j2d.ImageUtils; 
5     
6    import javax.swing.*; 
7    import java.awt.*; 
8    import java.awt.geom.AffineTransform; 
9    import java.awt.geom.Point2D; 
10    
11   /** 
12    * Copyright DocJava, inc. User: lyon 
13    * <p/> 
14    * Date: Dec 10, 2004 
15    * <p/> 
16    * Time: 7:20:50 PM 
17    */ 
18   public class AffineMediator { 
19       protected Image image; 
20       protected final AffineBean affineBean = new AffineBean(); 
21       protected ClosableJFrame controlFrame = new ClosableJFrame("Operations in Descending Order:"); 
22       protected Point2D location = new Point2D.Float(0, 0); 
23       protected Point2D mousePoint = new Point2D.Double(0, 0); 
24       private AffineTransform op; 
25       protected AffineTransform lastTransform = new AffineTransform(); 
26       protected AffineTransform priorTransform = new AffineTransform(); 
27       protected final ImagePanel imagePanel = new ImagePanel(); 
28    
29       protected void getNewImage() { 
30           image = ImageUtils.getImage(); 
31           //Set the mousePoint to the image center 
32           mousePoint = new Point(image.getWidth(imagePanel) / 2, image.getHeight(imagePanel) / 2); 
33       } 
34    
35    
36       public class ImagePanel extends JPanel { 
37           public void paint(Graphics g) { 
38               Graphics2D g2 = (Graphics2D) g; 
39               Dimension d = getSize(); 
40               g2.setColor(Color.blue); 
41               g2.fillRect(0, 0, d.width, d.height); 
42               AffineTransform tr1 = new AffineTransform(); 
43               AffineTransform tr2 = new AffineTransform(); 
44               AffineTransform tr3 = new AffineTransform(); 
45    
46               tr1.translate(-mousePoint.getX(), -mousePoint.getY()); 
47               tr1.concatenate(priorTransform); 
48               op = affineBean.getOperation(); 
49               op.concatenate(tr1); 
50               tr2.translate(mousePoint.getX(), mousePoint.getY()); 
51               tr2.concatenate(op); 
52               tr3.translate(location.getX(), location.getY()); 
53               tr3.concatenate(tr2); 
54    
55               g2.setTransform(tr3); 
56               lastTransform = tr3; 
57               if (image == null) return; 
58               g2.drawImage(image, 0, 0, this); 
59           } 
60       } 
61   } 
62