圆形JPanel Swing

Question

我试图在我的gui中显示一个圆形对象,圆形对象应该包含一些标签,因此我认为圆形对象应该扩展JPanel.有谁知道如何制作圆形JPanel？或者至少是一个描绘椭圆形的JPanel,并在椭圆形的中心放置一些JLable？

谢谢

Answer 1

绘制圆,子类JPanel和覆盖paintComponent:

public class CirclePanel extends JPanel {

    @Override
    protected void paintComponent(Graphics g) {
        g.drawOval(0, 0, g.getClipBounds().width, g.getClipBounds().height);
    }
}

看起来像这样:

替代文字http://img246.imageshack.us/img246/3708/so2343233.png

要放置标签,您可以使用GridBagLayout,希望这是您想要的:

CirclePanel panel = new CirclePanel();

panel.setLayout(new GridBagLayout());

GridBagConstraints gc;

gc = new GridBagConstraints();
gc.gridy = 0;
panel.add(new JLabel("Label 1"), gc);

gc = new GridBagConstraints();
gc.gridy = 1;
panel.add(new JLabel("Label 2"), gc);

替代文字http://img694.imageshack.us/img694/4013/so23432332.png