添加多个组件停用鼠标侦听器

Question

我已将 2 个 JComponent 添加到 JPanel。这两个 JComponent 上都有自定义绘制的对象，即多个 Circles 和多个 Line2D。这两个 jcomponent 的尺寸都设置为所需的屏幕大小。当我将它们添加到JPanel，鼠标监听器不起作用。但是，如果我评论其中一个，那么该监听器就会开始工作。

public class MapXMLBuilder extends JFrame {
        public void initialize() {
            panel = new Jpanel();
            addLine();//ading lines
            addCircle();//adding cirlces
            add(panel)
        }
        private void addLine() {
            mDrawLine = new DrawLine(panel);
            mDrawCircle.setDimensions(screenWidth, screenWidth);
            panel.add(mDrawLine); //adding JComponent1 to panel
            for (int i = 0; i < 10; i++) { //adding 10 circles       
                mDrawLine.addLine(new Point2D.Double(x, y));
            }
        }
        private void addCircle() {
            mDrawCircle = new DrawCircle(panel);
            mDrawCircle.setDimensions(screenWidth, screenWidth);
            panel.add(mDrawCircle); //adding JComponent1 to panel
            for (int i = 0; i < 10; i++) { //adding 10 circles       
                mDrawCircle.addCircle(new Point2D.Double(x, y));
            }
        }
    }

    public class DrawLine extends JComponent {
        public DrawLine(JPanel jpanel) {
            lineList = new ArrayList();
            addMouseListener(mouseAdapter);
            addMouseMotionListener(mouseAdapter);
            setBackground(Color.white);
        }
        public void addLine(int x1, int y1, int x2, int y2, Color color) {
            Shape currentShape = new Line2D.Float(x1, y1, x2, y2);
            lineList.add(currentShape);
            repaint();
        }
        protected void paintComponent(Graphics g) {
            super.paintComponent(g);
            Graphics2D g2d = (Graphics2D) g;
            g2d.setPaint(Color.BLACK);
            for (Shape shape: lineList) {
                if (shapes != null && shapes.size() > 0) {
                    g2d.setColor(Color.YELLOW);
                    g2d.draw(shape);
                }
            }
        }
        public void setDimensions(int width, int height) {
            setSize(new Dimension(width, height));
        }
    }

    public class DrawCircle extends JComponent {
        public DrawCircle(JPanel jpanel) {
            circleList = new ArrayList();
            addMouseListener(mouseAdapter);
            addMouseMotionListener(mouseAdapter);
            setBackground(Color.white);
        }
        public void addCircle(Point2D p) {
            Ellipse2D e = new Ellipse2D.Double(p.getX(), p.getY(), 5, 5);
            circleList.add(e);
            selectedPoint = null;
            repaint();
        }
        public void setDimensions(int width, int height) {
            setSize(new Dimension(width, height));
        }
        protected void paintComponent(Graphics g) {
            super.paintComponent(g);
            Graphics2D g2 = (Graphics2D) g;
            int diameter = 75;
            Ellipse2D e;
            Color color;
            for (int j = 0; j < circleList.size(); j++) {
                e = (Ellipse2D) circleList.get(j);
                float alpha = 0.75f;
                color = new Color(1, 0, 0, alpha); //Red 
                g2.setPaint(color);
                Ellipse2D.Double circle = new Ellipse2D.Double(e.getX(), e.getY(), diameter, diameter);
                g2.fill(circle);
            }
        }
    }

Answer 1

您可以将事件从一个转发到另一个。试试这样的：

firstComponent.addMouseListener(new MouseAdapter(){
    public void mouseClicked(MouseEvent event){
        // forward the event
        secondComponent.dispatchEvent(event);

        // handle the code here
    }
});
secondComponent.addMouseListener(// etc.