如何创建带圆角的JButton扩展？ [英] How to create a JButton extension with rounded corners?

问题描述

这是​​Java舍入Swing JButton问题的延续。我搜索了javax.swing.JButton的扩展，它将继承所有运行时行为，并且只是覆盖角的绘制。

This is a continuation of the question "Java rounded Swing JButton". I have searched for an extension of javax.swing.JButton which will inherit all runtime behavior and just override drawing of the corners.

使用 noah.w .jspa？threadID = 284897& tstart = 28696rel =nofollow noreferrer> sun论坛页面结果如下所示：

Using the code given by noah.w on sun forums page the result looks like this:

alt text http://i40.tinypic.com/107qfkp.jpg

我希望能够在后台使用相同的渐变，鼠标移位等等。有人知道怎么做吗？

I'd like to be able to have the same gradient in the background, on mouse over change etc. Does anybody know how to do that?

从图片中创建Java Swing窗口的代码是：

Code which creates the Java Swing window from the picture is:

public class XrButton extends JButton implements MouseListener {

    private static final long serialVersionUID = 9032198251140247116L;

    String text;
    boolean mouseIn = false;

    public XrButton(String s) {
        super(s);
        text = s;
        setBorderPainted(false);
        addMouseListener(this);
        setContentAreaFilled(false);
    }

    @Override
    public void paintComponent(Graphics g) {
        Graphics2D g2 = (Graphics2D) g;
        if (getModel().isPressed()) {
            g.setColor(g.getColor());
            g2.fillRect(3, 3, getWidth() - 6, getHeight() - 6);
        }
        super.paintComponent(g);

        if (mouseIn)
            g2.setColor(Color.red);
        else
            g2.setColor(new Color(128, 0, 128));

        g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
                RenderingHints.VALUE_ANTIALIAS_ON);
        g2.setStroke(new BasicStroke(1.2f));
        g2.draw(new RoundRectangle2D.Double(1, 1, (getWidth() - 3),
                (getHeight() - 3), 12, 8));
        g2.setStroke(new BasicStroke(1.5f));
        g2.drawLine(4, getHeight() - 3, getWidth() - 4, getHeight() - 3);

        g2.dispose();
    }

    public static void main(String[] args) {
        JFrame frame = new JFrame();
        frame.getContentPane().setLayout(new FlowLayout());

        XrButton xrButton = new XrButton("XrButton");
        JButton jButton = new JButton("JButton");

        frame.getContentPane().add(xrButton);

        frame.getContentPane().add(jButton);

        frame.setSize(150, 150);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setVisible(true);
    }

    public void mouseClicked(MouseEvent e) {
    }

    public void mouseEntered(MouseEvent e) {
        mouseIn = true;
    }

    public void mouseExited(MouseEvent e) {
        mouseIn = false;
    }

    public void mousePressed(MouseEvent e) {
    }

    public void mouseReleased(MouseEvent e) {
    }

推荐答案

我认为你有两个选择：

1.使用组件的绘制方法实现绘图

1.Implement drawing yourself in a paint method of your component

2.为您的外观创建新的ButtonUI。在这种情况下，我建议使用Synch LAF

2.Create new ButtonUI for your look and feel. In this case i would suggest to use Synch LAF

在这两种情况下，绘制不同的状态是你的责任

In both cases drawing different states is your resposibility

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