import java.awt.event.*;
import java.util.Vector;
import java.util.Enumeration;
import java.io.Serializable;
import javax.swing.*;

public class ArabTeamButtonGroup extends ButtonGroup implements Serializable {

    protected Vector buttons = new Vector();

    ButtonModel selection = null;

    public ArabTeamButtonGroup() {}

    public void add(AbstractButton b) {
        if(b == null) {
            return;
        }
        buttons.addElement(b);

        if (b.isSelected()) {
            if (selection == null) {
                selection = b.getModel();
            } else {
                b.setSelected(false);
            }
        }

        b.getModel().setGroup(this);
    }

    public void remove(AbstractButton b) {
        if(b == null) {
            return;
        }
        buttons.removeElement(b);
        if(b.getModel() == selection) {
            selection = null;
        }
        b.getModel().setGroup(null);
    }

    public Enumeration getElements() {
        return buttons.elements();
    }

    public ButtonModel getSelection() {
        return selection;
    }





    public void setSelected(ButtonModel m, boolean b) {
      if (!b && m != null && m == selection) {
        ButtonModel oldSelection = selection;
        selection = null;
        if (oldSelection != null) {
          oldSelection.setSelected(false);
        }
        m.setSelected(false);
        return;
      }
      if (b && m != null && m != selection) {
        ButtonModel oldSelection = selection;
        selection = m;
        if (oldSelection != null) {
          oldSelection.setSelected(false);
        }
        m.setSelected(true);
      }
    }

    public void deselectAll() {
      ButtonModel oldSelection = selection;
      selection = null;
      if (oldSelection != null) {
        oldSelection.setSelected(false);
      }
    }



    public boolean isSelected(ButtonModel m) {
        return (m == selection);
    }

    public int getButtonCount() {
                if (buttons == null) {
                    return 0;
                } else {
                    return buttons.size();
                }
    }

}