package checkbox;

import javax.swing.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.ArrayList;

public class ManyCheckComboBox extends JComboBox implements ActionListener {
    public ManyCheckComboBox() {
        addItem(new CheckValue(false, "È«Ñ¡"));
        this.addActionListener(
                new ActionListener() {
                    public void actionPerformed(ActionEvent ae) {
                        itemSelected();
                    }
                });
    }

    private void itemSelected() {
        if (getSelectedItem() instanceof CheckValue) {
            if (getSelectedIndex() == 0) {
                selectedAllItem();
            } else {
                CheckValue jcb = (CheckValue) getSelectedItem();
                jcb.bolValue = (!jcb.bolValue);
                setSelectedIndex(getSelectedIndex());
            }
            SwingUtilities.invokeLater(
                    new Runnable() {
                        public void run() {
                            /*Ñ¡ÖкóÒÀÈ»±£³Öµ±Ç°µ¯³ö״̬*/
                            showPopup();
                        }
                    });
        }
    }
    private void selectedAllItem() {
        boolean bl = false;
        for (int i = 0; i < getItemCount(); i++) {
            CheckValue jcb = (CheckValue) getItemAt(i);
            if (i == 0) {
                bl = !jcb.bolValue;
            }
            jcb.bolValue = (bl);
        }
        setSelectedIndex(0);
    }
    /*»ñÈ¡Ñ¡È¡µÄ¶ÔÏó*/
    public ArrayList getSelectItemValues() {
        ArrayList arrayList = new ArrayList();
        for (int i = 1; i < getItemCount(); i++) {
            CheckValue jcb = (CheckValue) getItemAt(i);
            if (jcb.bolValue) {
                arrayList.add(jcb.value);
            }
        }
        return arrayList;
    }
}