Jlist详解

package cn.zkingsoft;

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Component;
import java.awt.Image;
import java.awt.Toolkit;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.util.Vector;

import javax.swing.BorderFactory;
import javax.swing.DefaultListModel;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JList;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JScrollBar;
import javax.swing.JScrollPane;
import javax.swing.ListCellRenderer;
import javax.swing.ListModel;
import javax.swing.ListSelectionModel;
import javax.swing.ScrollPaneConstants;
import javax.swing.event.ListDataEvent;
import javax.swing.event.ListDataListener;
import javax.swing.event.ListSelectionEvent;
import javax.swing.event.ListSelectionListener;

public class JListTest extends JFrame{
    //数据
    private Object[] obj = new Object[5];
    private Vector<String> vec = new Vector<String>();
    private DefaultListModel dlm = new DefaultListModel();
    //容器
    private JList jlist = new JList();
    private JScrollPane jsp = new JScrollPane(jlist);
    private JButton jb = new JButton("测试");
    public JListTest() {
        this.setTitle("jlist");
        this.setSize(50, 500);
        this.setResizable(true);
        this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        this.setLocationRelativeTo(null);
        
        
        //使用数组的方式
//        obj[0]="aaa";
//        obj[1]="bbb";
//        obj[2]="ccc";
//        obj[3]="ddd";
//        obj[4]="eee";
//        jlist = new JList(obj);
        
        //使用集合
//        vec.add("111");
//        vec.add("222");
//        vec.add("333");
//        jlist = new JList(vec);
        
        //使用数据模式
//        dlm.addElement("小强");
//        dlm.addElement("小张");
//        dlm.addElement("小李");
//        dlm.addElement("小刘");
//        dlm.addElement("小黑");
//        dlm.addElement("小白");
        
        
        
        
        
        dlm.addElement(new MyContent("小黑","a.png"));
        dlm.addElement(new MyContent("小白","b.jpg"));
        dlm.addElement(new MyContent("小红","c.jpg"));
        dlm.addElement(new MyContent("小平","d.jpg"));
        jlist.setModel(dlm);
//        jlist = new JList(dlm);
        
        //设置单元格的高与宽
        jlist.setFixedCellHeight(40);
        jlist.setFixedCellWidth(10);
        //设置选择的模式
        jlist.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
//        jlist.setSelectionMode(ListSelectionModel.SINGLE_INTERVAL_SELECTION);
//        jlist.setSelectionMode(ListSelectionModel.MULTIPLE_INTERVAL_SELECTION);
        
//        jlist.setBorder(BorderFactory.createLineBorder(Color.RED));
//        jlist.setBorder(BorderFactory.createEtchedBorder());
//        jlist.setBorder(BorderFactory.createTitledBorder(BorderFactory.createEtchedBorder(), "我的好友"));
//        jlist.setBorder(BorderFactory.createTitledBorder(BorderFactory.createEmptyBorder(),"我的好友"));
        
        //添加选择监听事件
//        jlist.addListSelectionListener(new ListSelectionListener(){
//            public void valueChanged(ListSelectionEvent e) {
////                System.out.println(e.getFirstIndex());
////                System.out.println(e.getLastIndex());
//                System.out.println(e.getSource().getClass());
//            }
//        });
        
        //jlist鼠标事件
        jlist.addMouseListener(new MouseAdapter(){
            public void mouseClicked(MouseEvent e) {
//                System.out.println(jlist.getSelectedIndex());
                jlist.setSelectionBackground(Color.PINK);
                jlist.setSelectionForeground(Color.BLUE);
                System.out.println(jlist.getSelectedValue().toString());
                System.out.println(jlist.getSelectedIndex());
//                System.out.println(jlist.locationToIndex(e.getPoint()));
                MyContent mc = (MyContent)jlist.getSelectedValue();
                JOptionPane.showMessageDialog(JListTest.this, mc.getName()+"=="+mc.getPhoto());
            }
        });
        
        //监听数据改变的事件
        dlm.addListDataListener(new ListDataListener(){
            public void contentsChanged(ListDataEvent e) {
                System.out.println("contentsChanged");
            }
            public void intervalAdded(ListDataEvent e) {
                System.out.println("intervalAdded");
            }
            public void intervalRemoved(ListDataEvent e) {
                System.out.println("intervalRemoved");
            }
        });
        
        
        
        
//        jb.addActionListener(new ActionListener(){
//
//            public void actionPerformed(ActionEvent e) {
////                dlm.add(3, "张佳乐");
////                dlm.removeElement("小黑");
////                dlm.setElementAt("aaa", 2);
//            }
//            
//        });
        
        //设置单元格的渲染器
//        jlist.setCellRenderer(new MyButtom());
        jlist.setCellRenderer(new MyJpanel());
        
        jsp.setVerticalScrollBarPolicy(ScrollPaneConstants.VERTICAL_SCROLLBAR_AS_NEEDED);
        this.getContentPane().add(jsp);
//        this.getContentPane().add(jb,BorderLayout.SOUTH);
        this.setVisible(true);
    }
    
    
    //内部类
    class MyButtom extends JButton implements ListCellRenderer{
        public Component getListCellRendererComponent(JList list, Object value,
                int index, boolean isSelected, boolean cellHasFocus) {
            this.setText(value.toString());
             if (isSelected) {
                 setBackground(list.getSelectionBackground());
                 setForeground(list.getSelectionForeground());
             } else {
                 setBackground(list.getBackground());
                 setForeground(list.getForeground());
             }
            return this;
        }
    }
    /**
     * 面板渲染
     * @author Administrator
     *
     */
    class MyJpanel extends JPanel implements ListCellRenderer{
        final JLabel name = new JLabel();
        final ImageIcon ii = new ImageIcon();
        final JLabel photo = new JLabel(ii);
        public Component getListCellRendererComponent(JList list, Object value,
                int index, boolean isSelected, boolean cellHasFocus) {
            MyContent mc = (MyContent)value;
            name.setText(mc.getName());
            ii.setImage(Toolkit.getDefaultToolkit().createImage(mc.getPhoto()).getScaledInstance(40, 40, Image.SCALE_SMOOTH));
             if (isSelected) {
                 setBackground(list.getSelectionBackground());
                 setForeground(list.getSelectionForeground());
             } else {
                 setBackground(list.getBackground());
                 setForeground(list.getForeground());
             }
             this.add(photo);
             this.add(name);
            return this;
        }
    }
    
    
    
    public static void main(String[] args) {
        new JListTest();
    }

}