如何更改鼠标按下时的JButton颜色?

时间:2013-01-31 13:44:36

标签: java swing mouseevent jbutton

我希望根据鼠标事件(鼠标进入,退出,按下等)获得自定义颜色。所以要做到这一点,我写了下面的代码。它对一切都很好,除了鼠标按下事件的情况,什么都不做。 它仅在我覆盖UIManager中的颜色时才有效UIManager.put("Button.select", Color.red);UIManager的问题在于它会改变我的所有按钮。

任何人都可以告诉我,我可能做错了什么,或者最好的办法是什么来完成我想要做的事情?

我的代码:

final JButton btnSave = new JButton("Save");

btnSave.setForeground(new Color(0, 135, 200).brighter());
btnSave.setHorizontalTextPosition(SwingConstants.CENTER);
btnSave.setBorder(null);
btnSave.setBackground(new Color(3, 59, 90));

btnSave.addMouseListener(new MouseListener() {
    @Override
    public void mouseReleased(MouseEvent e) {
        btnSave.setBackground(new Color(3, 59, 90));
    }

    @Override
    public void mousePressed(MouseEvent e) {
        // Not working :(
        btnSave.setBackground(Color.pink);
    }

    @Override
    public void mouseExited(MouseEvent e) {
        btnSave.setBackground(new Color(3, 59, 90));
    }

    @Override
    public void mouseEntered(MouseEvent e) {
        btnSave.setBackground(new Color(3, 59, 90).brighter());
    }

    @Override
    public void mouseClicked(MouseEvent e) {
        btnSave.setBackground(new Color(3, 59, 90).brighter());
    }
});

EDIT1: 所以,我没有使用鼠标监听器,而是使用mKorbel建议的ChangeListenerButtonModel。使用此代码,我仍然没有观察到按钮上按下鼠标的任何更改,除非我按下并拖动按钮外部。有什么想法吗?

btnSave.getModel().addChangeListener(new ChangeListener() {

    @Override
    public void stateChanged(ChangeEvent e) {
        ButtonModel model = (ButtonModel) e.getSource();

        if (model.isRollover()) {
            btnSave.setBackground(new Color(3, 59, 90).brighter());
        } else if (model.isPressed()) {
            btnSave.setBackground(Color.BLACK);
        } else {
            btnSave.setBackground(new Color(3, 59, 90));
        }
    }
});

8 个答案:

答案 0 :(得分:23)

问题是由于JButton的内容区域默认填充,而金属L& F会在按下按钮时自动用内部选择的颜色填充它。

最好的办法是扩展JButton以创建自己的按钮,禁用填充的内容区域,并自己绘制按钮的背景。

这是一个小型演示(不确定它适用于其他L& F,甚至非常确定它没有):

import java.awt.Color;
import java.awt.Graphics;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.SwingConstants;
import javax.swing.SwingUtilities;

public class TestButton {

    class MyButton extends JButton {

        private Color hoverBackgroundColor;
        private Color pressedBackgroundColor;

        public MyButton() {
            this(null);
        }

        public MyButton(String text) {
            super(text);
            super.setContentAreaFilled(false);
        }

        @Override
        protected void paintComponent(Graphics g) {
            if (getModel().isPressed()) {
                g.setColor(pressedBackgroundColor);
            } else if (getModel().isRollover()) {
                g.setColor(hoverBackgroundColor);
            } else {
                g.setColor(getBackground());
            }
            g.fillRect(0, 0, getWidth(), getHeight());
            super.paintComponent(g);
        }

        @Override
        public void setContentAreaFilled(boolean b) {
        }

        public Color getHoverBackgroundColor() {
            return hoverBackgroundColor;
        }

        public void setHoverBackgroundColor(Color hoverBackgroundColor) {
            this.hoverBackgroundColor = hoverBackgroundColor;
        }

        public Color getPressedBackgroundColor() {
            return pressedBackgroundColor;
        }

        public void setPressedBackgroundColor(Color pressedBackgroundColor) {
            this.pressedBackgroundColor = pressedBackgroundColor;
        }
    }

    protected void createAndShowGUI() {
        JFrame frame = new JFrame("Test button");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        final MyButton btnSave = new MyButton("Save");
        btnSave.setForeground(new Color(0, 135, 200).brighter());
        btnSave.setHorizontalTextPosition(SwingConstants.CENTER);
        btnSave.setBorder(null);
        btnSave.setBackground(new Color(3, 59, 90));
        btnSave.setHoverBackgroundColor(new Color(3, 59, 90).brighter());
        btnSave.setPressedBackgroundColor(Color.PINK);
        frame.add(btnSave);
        frame.setSize(200, 200);
        frame.setVisible(true);
    }

    public static void main(String[] args) {
        SwingUtilities.invokeLater(new Runnable() {
            @Override
            public void run() {
                new TestButton().createAndShowGUI();
            }
        });

    }

}

答案 1 :(得分:10)

答案 2 :(得分:2)

public class MyCustomButton extends JButton {
    private Color pressedColor = Color.GREEN;
    private Color rolloverColor = Color.RED;
    private Color normalColor = Color.BLUE;

    public MyCustomButton (String text) {
        super(text);
        setBorderPainted(false);
        setFocusPainted(false);

        setContentAreaFilled(false);
        setOpaque(true);

        setBackground(normalColor);
        setForeground(Color.WHITE);
        setFont(new Font("Tahoma", Font.BOLD, 12));
        setText(text);

        addChangeListener(new ChangeListener() {
            @Override
            public void stateChanged(ChangeEvent evt) {
                if (getModel().isPressed()) {
                    setBackground(pressedColor);
                } else if (getModel().isRollover()) {
                    setBackground(rolloverColor);
                } else {
                    setBackground(normalColor);
                }
            }
        });
    }
}

答案 3 :(得分:0)

就我而言,我只想在用户按下按钮时进行简单的背景和颜色切换。

适应的Guillaume Polet解决方案:

import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics;

import javax.swing.ButtonModel;
import javax.swing.JButton;

@SuppressWarnings("serial")
class Button extends JButton {

    private Color pressedForeground = Color.BLACK;
    private Color pressedBackground = Color.WHITE;

    Button() {
        this(null);
    }

    Button(String text) {
        super(text);
        super.setContentAreaFilled(false);
        setForeground(Color.WHITE);
        setBackground(Color.BLACK);
        setFocusPainted(false);
        setBorderPainted(false);
        setFont(new Font("arial", Font.PLAIN, 16));
    }

    @Override
    public void paint(Graphics g) {
        Color oldFg = getForeground();
        Color newFg = oldFg;
        ButtonModel mod = getModel();

        if (mod.isPressed()) {
            newFg = pressedForeground;
            g.setColor(pressedBackground);
        } else {
            g.setColor(getBackground());
        }

        g.fillRect(0, 0, getWidth(), getHeight());
        setForeground(newFg);
        super.paintComponent(g);
        setForeground(oldFg);
    }
}

答案 4 :(得分:0)

这对我有用!试试这个兄弟...

final JButton btnSave = new JButton("Save");

btnSave.setForeground(new Color(0, 135, 200).brighter());
btnSave.setHorizontalTextPosition(SwingConstants.CENTER);
btnSave.setBorder(null);

UIManager.put("Button.select", new Color(3, 59, 90)); //<--- Added ---
//btnSave.setBackground(new Color(3, 59, 90));

btnSave.addMouseListener(new MouseListener() {
    @Override
    public void mouseReleased(MouseEvent e) {
        UIManager.put("Button.select", new Color(3, 59, 90)); //<--- Added ---
        //btnSave.setBackground(new Color(3, 59, 90));
    }

    @Override
    public void mousePressed(MouseEvent e) {
        // it's working :)
        UIManager.put("Button.select", Color.pink); //<--- Added ---
        //btnSave.setBackground(Color.pink);
    }

    @Override
    public void mouseExited(MouseEvent e) {
        btnSave.setBackground(new Color(3, 59, 90));
    }

    @Override
    public void mouseEntered(MouseEvent e) {
        btnSave.setBackground(new Color(3, 59, 90).brighter());
    }

    @Override
    public void mouseClicked(MouseEvent e) {
        btnSave.setBackground(new Color(3, 59, 90).brighter());
    }
});    

答案 5 :(得分:-1)

可能只是可以尝试使用:Color.PINK,大写字母?这样做会有什么变化吗?

也不会鼠标按下&amp; mouseclicked互相覆盖?当你按下它时,鼠标按压应该反应。释放按下鼠标时单击

答案 6 :(得分:-1)

您可以尝试将背景设置为可伸缩的图像文件并将其设置为背景,而不是设置颜色,因为看起来不起作用。可能有用吗?

答案 7 :(得分:-1)

尝试使用已有的内容:

yourButton.setBorder(null);
yourButton.setContentAreaFilled(false);