重写JButton paintComponent（）不工作的Java [英] Override JButton paintComponent() doesn't work java

问题描述

我想绘制我自己的JButton版本，所以我重写了 paintComponent（）方法，并绘制了一个渐变roundRect。这是有效的，但在此之后，我想在其上绘制Button的String，并且在编译时，我没有收到任何错误消息。但是在运行时，我只能看到roundRect，渐变，就像我想要的那样（我也可以点击它），但是字符串是不可见的...

I wanted to paint my own version of JButton, so I have overridden the paintComponent() method, and drew a gradient roundRect. This works, but after that, I want to draw the String of the Button over it, and at compile-time, I got no error messages. But at runtime, I only see the roundRect, gradient, just as I intended it to be (I can click on it too), but the String is invisible...

这里是我的代码：

import javax.swing.*;
import javax.swing.border.*;
import java.awt.*;
import java.awt.event.*;

public class JIconButton extends JButton implements MouseListener
{
    private boolean mouseInside;
    public JIconButton(String file, String text)
    {
        super(text, new ImageIcon(file));
        setBorder(new LineBorder(Color.LIGHT_GRAY, 0, true));
        setContentAreaFilled(false);
        setFocusPainted(false);
        addMouseListener(this);
        setVisible(true);
    }

    public void mouseClicked(MouseEvent e)
    {

    }

    public void mouseEntered(MouseEvent e)
    {

    }

    public void mouseExited(MouseEvent e)
    {

    }

    public void mousePressed(MouseEvent e)
    {

    }

    public void mouseReleased(MouseEvent e) 
    {

    }

    @Override
    protected void paintComponent(Graphics g)
    {
        Graphics2D g2 = (Graphics2D)g.create();
        g2.setPaint(Color.BLACK);
        g2.drawString(getText(), 0, 0);
        g2.setPaint(new GradientPaint(
                new Point(0, 0), 
                Color.WHITE, 
                new Point(0, getHeight()), 
                Color.PINK.darker()));
        g2.fillRoundRect(0, 0, getWidth(), getHeight(), 30, 30);
        g2.dispose();

        //super.paintComponent(g);
    }
}

推荐答案

根据我的评论，它为我工作....


例如：

As per my comment, "it worked for me...."
For example:

   @Override
   protected void paintComponent(Graphics g) {
      Graphics2D g2 = (Graphics2D) g.create();
      g2.setPaint(new GradientPaint(new Point(0, 0), Color.WHITE, new Point(0,
            getHeight()), Color.PINK.darker()));
      g2.fillRoundRect(0, 0, getWidth(), getHeight(), 30, 30);
      g2.setPaint(Color.BLACK);
      g2.drawString(getText(), 30, 12);
      g2.dispose();

      // super.paintComponent(g);
   }

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