设置和禁用 JToggleButton 的图标

问题描述

我正在尝试制作一个匹配的记忆游戏，我使用 JToggleButton.最重要的是，当我按下按钮时，它必须显示一张图片，我必须找到另一张相同的图片.所以问题是当我创建一个没有任何图标的按钮时，我不能使用其他其他方法，例如 .setRollOverIcon()、.setPressedIcon() 等，所以我很感激你可以帮我 .无论如何，谢谢:)

hi there i am trying to make a matching memory game which i use JToggleButton. the main thing is when i press to button it must show a picture and i must find the other same picture. so the problem is when i create a button without any icons i cant use other other methods for example .setRollOverIcon(), .setPressedIcon() etc. so i appreciated if you can help me . and thanks anyway :)

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

public class ButtonsIcon extends JFrame {

    private static final long serialVersionUID = 1L;
    private ImageIcon errorIcon = (ImageIcon) UIManager.getIcon("OptionPane.errorIcon");
    private ImageIcon infoIcon = (ImageIcon) UIManager.getIcon("OptionPane.informationIcon");
    private ImageIcon warnIcon = (ImageIcon) UIManager.getIcon("OptionPane.warningIcon");

    public static void main(String[] args) {
        SwingUtilities.invokeLater(new Runnable() {

            @Override
            public void run() {
                ButtonsIcon t = new ButtonsIcon();
            }
        });
    }

    public ButtonsIcon() {
        setLayout(new GridLayout(1, 1, 4, 4));

        final JToggleButton toggleButton = new JToggleButton();
        //toggleButton.setIcon((errorIcon));
        toggleButton.setRolloverIcon((infoIcon));
        toggleButton.setPressedIcon(warnIcon);
        toggleButton.setDisabledIcon(warnIcon);
        toggleButton.addItemListener(new ItemListener() {

            @Override
            public void itemStateChanged(ItemEvent e) {
                if (toggleButton.isSelected()) {
                } else {
                }
            }
        });
        add(toggleButton);

        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        pack();
        setVisible(true);
    }
}

推荐答案

一种方法是执行以下操作:

One approach is to do the following:

• 使用选中状态指示是显示还是隐藏图标.
• 使用启用状态来指示已匹配一对.

代码大纲:

/** Handle ItemEvents. */
@Override
public void itemStateChanged(ItemEvent e) {
    GameButton gb = (GameButton) e.getItem();
    gb.setState();
}

/** Remove a and b from play. */
private void retirePair(GameButton a, GameButton b) {
    a.setSelected(true);
    a.setEnabled(false);
    b.setSelected(true);
    b.setEnabled(false);
}

class GameButton extends JToggleButton {
    ...
    public void setState() {
        if (this.isSelected() || !this.isEnabled()) {
            this.setIcon(icon);
        } else {
            this.setIcon(hidden);
        }
    }
}

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