使用Windows LAF时按钮的背景色？

Question

我有一个Java应用程序，它使用本机LAF，如下所示：

    UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());

这是伟大的工作，然而，我试图使一个按钮有一个红色的背景，但最终像这样：

正如你所看到的，我在按钮上设置了背景和前景，但结果并不令人满意。有没有一种方法可以让按钮在不子类化JButton的情况下绘制红色背景？

Answer 1

对于我遇到问题的任何人，以下是我的解决方案：

我使用ImageIcon切换到使用添加为按钮子级的图像：

    BufferedImage stopPicture = null;
    try {
        stopPicture = ImageIO.read(new File("stop.png"));
    } catch (IOException ex) { }
    JLabel picLabel = new JLabel(new ImageIcon( stopPicture ));
    JButton btnStop = new JButton("");
    btnStop.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent e) {
            SerialTest.getInstance().stopMoving();
        }
    });
    btnStop.add(picLabel);

Answer 2

我创建了我自己的CustomColorButton，在点击和鼠标时，它会产生很好的渐变效果

UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());

您可以创建一个新按钮，如下所示：

CustomColorButton button = new CustomColorButton(Color.RED, Color.WHITE); // Background and font color
button.setText("Color button!");

CustomColorButton类：

public class CustomColorButton extends JButton implements ActionListener, MouseListener
{
    private boolean hovered = false;
    private boolean clicked = false;

    private Color normalColor = null;
    private Color lightColor = null;
    private Color darkColor = null;

    public CustomColorButton(Color normalRedColor, Color fontColor)
    {
        setForeground(fontColor);

        this.normalColor = normalRedColor;
        this.lightColor = normalRedColor.brighter();
        this.darkColor = normalRedColor.darker();

        addActionListener(this);
        addMouseListener(this);
        setContentAreaFilled(false);
    }

    /**
     * Overpainting component, so it can have different colors
     */
    @Override
    public void paintComponent(Graphics g)
    {
        super.paintComponent(g);
        Graphics2D g2d = (Graphics2D) g;

        GradientPaint gp = null;

        if (clicked)
            gp = new GradientPaint(0, 0, darkColor, 0, getHeight(), darkColor.darker());
        else if (hovered)
            gp = new GradientPaint(0, 0, lightColor, 0, getHeight(), lightColor.darker());
        else
            gp = new GradientPaint(0, 0, normalColor, 0, getHeight(), normalColor.darker());

        g2d.setPaint(gp);

        // Draws the rounded opaque panel with borders
        g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON); // For High quality
        g2d.fillRoundRect(0, 0, getWidth(), getHeight(), 7, 7);

        g2d.setColor(darkColor.darker().darker());
        g2d.drawRoundRect(0, 0, getWidth() - 1, getHeight() - 1, 7, 7);

        super.paintComponent(g);
    }

    @Override
    public void actionPerformed(ActionEvent arg0)
    {
        System.out.println("Button clicked!");
    }

    @Override
    public void mouseClicked(MouseEvent arg0)
    {

    }

    @Override
    public void mouseEntered(MouseEvent arg0)
    {
        hovered = true;
        clicked = false;

        repaint();
    }

    @Override
    public void mouseExited(MouseEvent arg0)
    {
        hovered = false;
        clicked = false;

        repaint();
    }

    @Override
    public void mousePressed(MouseEvent arg0)
    {
        hovered = true;
        clicked = true;

        repaint();
    }

    @Override
    public void mouseReleased(MouseEvent arg0)
    {
        hovered = true;
        clicked = false;

        repaint();
    }
}

Answer 3

你必须明白在斯温的眼神下