如何将 JRadioButton 组与模型一起使用

2022-01-21 00:00:00 radio-button java swing jradiobutton

有没有办法将一组 JRadioButtons 与数据模型相关联，以便更容易判断选择了哪个按钮(如果有)?

Is there any way to associate a group of JRadioButtons with a data model so it is easier to tell which button (if any) is selected?

在理想情况下，我想将一组 N 个单选按钮与一个 enum 类相关联，该类具有一个 NONE 值和一个与每个单选按钮关联的值.

In an ideal world, I would like to associate a group of N radiobuttons with an enum class that has a NONE value and one value associated with each radiobutton.

推荐答案

我自己解决了这个问题，这并不难，所以分享和享受:

I solved my own problem, this wasn't too hard, so share and enjoy:

import java.util.EnumMap;
import java.util.Map;
import javax.swing.JRadioButton;

public class RadioButtonGroupEnumAdapter<E extends Enum<E>> {
    final private Map<E, JRadioButton> buttonMap;

    public RadioButtonGroupEnumAdapter(Class<E> enumClass)
    {
        this.buttonMap = new EnumMap<E, JRadioButton>(enumClass);
    }
    public void importMap(Map<E, JRadioButton> map)
    {
        for (E e : map.keySet())
        {
            this.buttonMap.put(e, map.get(e));
        }
    }
    public void associate(E e, JRadioButton btn)
    {
        this.buttonMap.put(e, btn);
    }
    public E getValue()
    {
        for (E e : this.buttonMap.keySet())
        {
            JRadioButton btn = this.buttonMap.get(e);
            if (btn.isSelected())
            {
                return e;
            }
        }
        return null;
    }
    public void setValue(E e)
    {
        JRadioButton btn = (e == null) ? null : this.buttonMap.get(e);
        if (btn == null)
        {
            // the following doesn't seem efficient...
                    // but since when do we have more than say 10 radiobuttons?
            for (JRadioButton b : this.buttonMap.values())
            {
                b.setSelected(false);
            }

        }
        else
        {
            btn.setSelected(true);
        }
    }
}

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