RectangleFrame3.java.html

  1  import java.awt.event.MouseListener;
  2  import java.awt.event.MouseEvent;
  3  import javax.swing.JFrame;
  4  
  5  import java.awt.event.KeyListener;
  6  import java.awt.event.KeyEvent;
  7  import javax.swing.KeyStroke;
  8  
  9  /** 	 	 	 	 	 	
 10     This frame contains a moving rectangle.
 11  */
 12  public class RectangleFrame3 extends JFrame
 13  {
 14     private static final int FRAME_WIDTH = 300;
 15     private static final int FRAME_HEIGHT = 400;
 16  
 17     private RectangleComponent3 scene;
 18  
 19     class MousePressListener implements MouseListener
 20     {  
 21        public void mousePressed(MouseEvent event)
 22        {  
 23           int x = event.getX();
 24           int y = event.getY();
 25           scene.moveRectangleTo(x, y);
 26        }
 27  
 28        // Do-nothing methods
 29        public void mouseReleased(MouseEvent event) {}
 30        public void mouseClicked(MouseEvent event) {}
 31        public void mouseEntered(MouseEvent event) {}
 32        public void mouseExited(MouseEvent event) {}
 33     }
 34  
 35     class KeyStrokeListener implements KeyListener
 36     {
 37        public void keyPressed(KeyEvent event) 
 38        {
 39           String key = KeyStroke.getKeyStrokeForEvent(event).toString().replace("pressed ", ""); 
 40           if (key.equals("DOWN"))
 41           {
 42              scene.moveRectangleBy(0, 1);            
 43           }
 44           else if (key.equals("UP"))
 45           {
 46              scene.moveRectangleBy(0, -1);            
 47           }
 48           else if (key.equals("LEFT"))
 49           {
 50              scene.moveRectangleBy(-1, 0);            
 51           }
 52           else if (key.equals("RIGHT"))
 53           {
 54              scene.moveRectangleBy(1, 0);            
 55           }
 56        }
 57        public void keyTyped(KeyEvent event) {}
 58        public void keyReleased(KeyEvent event) {}
 59     }
 60           
 61     public RectangleFrame3()
 62     {
 63        scene = new RectangleComponent3();
 64        add(scene);
 65  
 66        MouseListener listener = new MousePressListener();
 67        scene.addMouseListener(listener);
 68  
 69        scene.addKeyListener(new KeyStrokeListener());
 70        scene.setFocusable(true);
 71  
 72        setSize(FRAME_WIDTH, FRAME_HEIGHT);
 73     }
 74  }