Переменные изображения на MouseClick

Question

Я работаю с MouseListener, в частности с MouseClick, и с изображением. Изображение перемещается вокруг панели.

Как это сделать, чтобы при щелчке в пределах 30 пикселей от текущего местоположения изображения чередуются?

Вот моя рамка.

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

public class Rebound 
{ 

public static void main (String[] args) 
{ 
    JFrame frame = new JFrame ("Rebound"); 
    frame.setDefaultCloseOperation (JFrame.EXIT_ON_CLOSE); 

    frame.getContentPane().add(new ReboundPanel()); 
    frame.pack(); 
    frame.setVisible(true); 
} 
} 

Вот моя панель.

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

public class ReboundPanel extends JPanel 
{ 
    private final int WIDTH = 300, HEIGHT = 100; 
    private final int DELAY = 20, IMAGE_SIZE = 35; 

    private ImageIcon image; 
    private Timer timer; 
    private int x, y, moveX, moveY; 
    private ImageIcon image2; 



public ReboundPanel() 
{ 
    timer = new Timer(DELAY, new ReboundListener()); 

    image = new ImageIcon("C:\\happyFace.gif"); 
    image2 = new ImageIcon("C:\\red smiley.gif"); 


    x = 0; 
    y = 40; 
    moveX = moveY = 3;  

    setPreferredSize (new Dimension(WIDTH, HEIGHT)); 
    setBackground (Color.black); 
    addMouseListener(new MousePressListener()); 
    timer.start(); 
} 

public void paintComponent (Graphics page) 
{ 
    super.paintComponent (page); 
    image.paintIcon (this, page, x, y); 
} 

    class MousePressListener implements MouseListener 
    { 
     public void mousePressed(MouseEvent event) {} 
     public void mouseReleased(MouseEvent event) {} 
     public void mouseClicked(MouseEvent event) { 

      image = image2; 

    } 
    public void mouseEntered(MouseEvent event) {} 
    public void mouseExited(MouseEvent event) {} 
} 

private class ReboundListener implements ActionListener 
{ 
    //-------------------------------------------------------------- 
    // Updates the position of the image and possibly the direction 
    // of movement whenever the timer fires an action event. 
    //-------------------------------------------------------------- 
    public void actionPerformed (ActionEvent event) 
    { 
    x += moveX; 
    y += moveY; 

    if (x <= 0 || x >= WIDTH-IMAGE_SIZE) 
     moveX = moveX * -1; 

    if (y <= 0 || y >= HEIGHT-IMAGE_SIZE) 
     moveY = moveY * -1; 

    repaint(); 
    } 
} 
} 

Answer 1

Попробуйте этот пример кода и задать любой вопрос, который может возникнуть:

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

public class LocateMouseExample { 
    /* 
    * This is just JFrame, that we be 
    * using as the Base for our Application. 
    * Though here we are calling our 
    * JPanel (CustomPanel), whose 
    * paintComponent(...) method, we had 
    * override. 
    */ 
    private void createAndDisplayGUI() { 
     JFrame frame = new JFrame("Locate Mouse Position"); 
     frame.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE); 

     CustomPanel contentPane = new CustomPanel(); 
     frame.setContentPane(contentPane); 
     frame.pack(); 
     frame.setLocationByPlatform(true); 
     frame.setVisible(true); 
    } 

    public static void main(String\u005B\u005D args) { 
     SwingUtilities.invokeLater(new Runnable() { 
      public void run() { 
       new LocateMouseExample().createAndDisplayGUI(); 
      } 
     }); 
    } 
} 

class CustomPanel extends JComponent { 

    private final int SIZE = 50; 
    private int imageX = 100; 
    private int imageY = 100; 
    private int imageIndex; 

    private ImageIcon image; 
    private ImageIcon firstImage; 
    private ImageIcon secondImage; 
    private java.net.URL url; 

    private Rectangle boundsForMouse; 

    public CustomPanel() { 
     image = new ImageIcon(); 
     try { 
      url = new java.net.URL("http://gagandeepbali.uk.to/gaganisonline/images/eclipse/caIcon.png"); 
      firstImage = new ImageIcon(url); 
      url = new java.net.URL("http://gagandeepbali.uk.to/gaganisonline/images/swing/share/Keyboard.png"); 
      secondImage = new ImageIcon(url); 
     } catch(Exception e) { 
      e.printStackTrace(); 
     } 
     imageIndex = 1; 
     image.setImage(firstImage.getImage()); 

     boundsForMouse = new Rectangle(imageX - 30, 
             imageY - 30, 
             firstImage.getIconWidth() + 60, 
             firstImage.getIconHeight() + 60);  
     setOpaque(true);   
     addMouseListener(new MouseController());   
    } 

    private int setImage(int counter) { 
     System.out.println("Image Index : " + counter); 
     if (counter == 1) { 
      image = new ImageIcon(); 
      image.setImage(secondImage.getImage()); 
      boundsForMouse = new Rectangle(imageX - 30, 
             imageY - 30, 
             secondImage.getIconWidth() + 60, 
             secondImage.getIconHeight() + 60); 
      repaint(); 
      counter++; 
      return (counter); 
     } else if (counter == 2) { 
      image = new ImageIcon();  
      image.setImage(firstImage.getImage()); 
      boundsForMouse = new Rectangle(imageX - 30, 
             imageY - 30, 
             firstImage.getIconWidth() + 60, 
             firstImage.getIconHeight() + 60); 
      repaint(); 
      return (--counter); 
     } 
     return 1; 
    } 

    @Override 
    public Dimension getPreferredSize() { 
     return (new Dimension(500, 500)); 
    } 

    @Override 
    public void paintComponent(Graphics g) { 
     super.paintComponent(g); 
     g.clearRect(0, 0, getWidth(), getHeight()); 
     g.drawImage(image.getImage(), imageX, imageY, null); 
    } 

    private class MouseController extends MouseAdapter { 
     public void mouseClicked(MouseEvent me) {   
      int xHitOnPanel = me.getX(); 
      int yHitOnPanel = me.getY(); 
      System.out.println("X HIT : " + xHitOnPanel); 
      System.out.println("Y HIT : " + yHitOnPanel); 
      System.out.println("RECTANGLE BOUNDS X : " + boundsForMouse.x); 
      System.out.println("RECTANGLE BOUNDS Y : " + boundsForMouse.y); 

      if (boundsForMouse.contains(xHitOnPanel, yHitOnPanel)) 
       imageIndex = setImage(imageIndex); 
     } 
    } 
}