java - JPanel 中新的不可见层

Question

我想寻求帮助。我想要这样的东西:http://docs.oracle.com/javase/tutorial/uiswing/components/rootpane.html#glasspane

我有这个带有 map 的应用程序，我想在新的不可见图层中有一张小图片。小图片可以通过JSliders上下移动。该层应该仅位于“标签”上方。有这样的代码:

 private JPanel mujPanel5() {
    JSlider [] posuvniky = new JSlider[2];
    posuvniky[0] = new JSlider(SwingConstants.HORIZONTAL, 0, 100, 30);
    posuvniky[1] = new JSlider(SwingConstants.VERTICAL, 0, 100, 60);
    for (int i = 0; i < posuvniky.length; i++) {
        posuvniky[i].addChangeListener(new ZmenaPosuvniku5()); //Listener do nothing
    }

    URL umisteniMapy = this.getClass().getResource("map.jpg");
    Icon obrazek = new ImageIcon(umisteniMapy);
    JLabel label = new JLabel(obrazek, SwingConstants.CENTER);
    label.setOpaque(true);
    label.setBackground(Color.white);

    JPanel panel = new JPanel();
    panel.setLayout(new BorderLayout());
    panel.add(posuvniky[0], BorderLayout.NORTH);
    panel.add(posuvniky[1], BorderLayout.WEST);
    panel.add(label, BorderLayout.CENTER);
    return panel;
}

谢谢大家。

嗯...

Answer 1

I do not know how to create described invisible layer

参见How to Use Layered Panes .