JComponent not registrationing

Question

所以我有以下類。我已經過度簡化了代碼，因爲不能提供超過500行代碼。它基本上是一個很花哨的方：

public class ModuleGui extends JComponent implements ElementInterface { 

private String name; 

private Rectangle2D s = new Rectangle2D.Double(); 
private Rectangle2D[] points; 
private int resizeSize = 10; 

private final ShapeResizeHandler shapeResizeHandler = new ShapeResizeHandler(); 

public ModuleGui(int x, int y){ 

    this.addMouseListener(shapeResizeHandler); 
    this.addMouseMotionListener(shapeResizeHandler); 

    this.x = x; 
    this.x = y; 

    points = new Rectangle2D[2]; 
    points[0] = new Rectangle2D.Double(x,y,1,1); 
    points[1] = new Rectangle2D.Double(x + width, y + height, resizeSize, resizeSize); 

    this.name = new String("Gate" + Integer.toString(namingCounter++)); 
} 

public void paintComponent(Graphics g){ 
    super.paintComponent(g); 

    Graphics2D g2d = (Graphics2D) g; 

    g2d.fill(points[1]); 

    //Set the main rectangle, fill it and draw it 
    s.setRect(points[0].getX(), points[0].getY(), 
      Math.abs(points[1].getCenterX() - points[0].getCenterX()), 
      Math.abs(points[1].getCenterY() - points[0].getCenterY())); 
    g2d.setColor(Color.WHITE); 
    g2d.fill(s); 
    g2d.setColor(Color.BLACK); 
    g2d.draw(s); 
    //Main rectangle draw end 

    //Add the name and the & symbol 
    g2d.drawString(this.name, (int) (s.getCenterX()), (int) (s.getY() + this.height/10)); 
} 


private class ShapeResizeHandler extends MouseAdapter{ 
    public void mousePressed(MouseEvent e){ 
     System.out.println("Funny"); 
    } 

    public void mouseReleased(){ 
     //Do more stuff 
    } 

    public void mouseDragged(MouseEvent e){ 
     //Do Stuff 
     repaint(); 
    } 
} 
    } 

現在我有此JComponent內部JPanel..but我似乎沒有趕上任何鼠標事件。鼠標事件顯示在JPanel中，但不在JComponent中。我試圖讓一個簡單的鼠標監聽器打印一些東西，但是也發生了同樣的情況。

Answer 1

確保您的組件可見且具有非零尺寸。下面是代碼爲我的作品：

public class MouseTest extends JComponent { 
    public MouseTest() { 
     addMouseListener (new MouseAdapter() { 
      @Override 
      public void mousePressed (MouseEvent e) { 
       System.out.println ("Mouse pressed"); 
       e.consume(); 
      } 
     }); 
    } 

    @Override 
    public Dimension getPreferredSize() { 
     return new Dimension (320, 240); 
    } 

    @Override 
    public void paint(Graphics g) { 
     g.setColor (Color.cyan); 
     g.fillRect (getX(), getY(), getWidth(), getHeight()); 
    } 

    public static void main(String[] args) { 
     JFrame frame = new JFrame ("Mouse Test"); 
     frame.setDefaultCloseOperation (JFrame.EXIT_ON_CLOSE); 
     frame.getContentPane().setLayout (new BorderLayout()); 
     frame.getContentPane().add (new MouseTest(), BorderLayout.CENTER); 
     frame.pack(); 
     frame.setVisible (true); 
    } 
}