使用Windows LAF时按钮的背景颜色?

时间:2012-06-10 23:07:24

标签: java swing jbutton look-and-feel

我有一个使用本机LAF的Java应用程序,如下所示:

    UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());

这很好用,但是,我试图让按钮有一个红色背景,但最终会像这样:

enter image description here

正如您所看到的,我在按钮上设置了背景和前景,但结果并不令人满意。 有没有办法让按钮在没有继承JButton的情况下绘制红色背景?

4 个答案:

答案 0 :(得分:4)

你必须明白,在Swing的Look&感觉结构,它是JButton的UI委托来完成它的绘图,而不是JButton本身,因此setBackground(...)在这种情况下不能很好地工作。你可能最好不要在按钮上添加一个图标。

答案 1 :(得分:2)

对于任何遇到问题的人来说,这是我采用的解决方案:

我使用ImageIcon切换为使用添加为按钮子项的图像:

    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);

答案 2 :(得分:2)

我在点击鼠标悬停上创建了我自己的 CustomColorButton 漂亮的渐变结束效果/ p>

UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());

您可以像这样创建一个新按钮:

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();
    }
}

答案 3 :(得分:0)

如果“没有子类化”意味着不必自己扩展它,那么你可以选择使用SwingX JXButton,它扩展了JButton以使用画家(等等):

JButton button = new JButton();
button.setBackground(bg);

变为

JXButton button = new JXButton();
button.setBackgroundPainter(new MattePainter(bg));

如果你必须坚持基础JButton,我认为没有一个解决方案,因为你和L& F的工作方式。