draglistdemo.java

Java样例程序集合：2D

/*
 * DragListDemo.java is a 1.4 example that
 * requires the following file:
 *    ArrayListTransferHandler.java
 */
import java.util.*;
import java.io.*;
import java.awt.*;
import java.awt.event.*;
import java.awt.datatransfer.*;
import java.awt.dnd.*;
import javax.swing.*;

public class DragListDemo extends JPanel {
    ArrayListTransferHandler arrayListHandler;

    public DragListDemo() {
        arrayListHandler = new ArrayListTransferHandler();
        JList list1, list2;

        DefaultListModel list1Model = new DefaultListModel();
        list1Model.addElement("0 (list 1)");
        list1Model.addElement("1 (list 1)");
        list1Model.addElement("2 (list 1)");
        list1Model.addElement("3 (list 1)");
        list1Model.addElement("4 (list 1)");
        list1Model.addElement("5 (list 1)");
        list1Model.addElement("6 (list 1)");
        list1 = new JList(list1Model);
        list1.setSelectionMode(ListSelectionModel.SINGLE_INTERVAL_SELECTION);
        list1.setTransferHandler(arrayListHandler);
        list1.setDragEnabled(true);
        JScrollPane list1View = new JScrollPane(list1);
        list1View.setPreferredSize(new Dimension(200, 100));
        JPanel panel1 = new JPanel();
        panel1.setLayout(new BorderLayout());
        panel1.add(list1View, BorderLayout.CENTER);
        panel1.setBorder(BorderFactory.createEmptyBorder(5,5,5,5));

        DefaultListModel list2Model = new DefaultListModel();
        list2Model.addElement("0 (list 2)");
        list2Model.addElement("1 (list 2)");
        list2Model.addElement("2 (list 2)");
        list2Model.addElement("3 (list 2)");
        list2Model.addElement("4 (list 2)");
        list2Model.addElement("5 (list 2)");
        list2Model.addElement("6 (list 2)");
        list2 = new JList(list2Model);
        list2.setSelectionMode(ListSelectionModel.SINGLE_INTERVAL_SELECTION);
        list2.setTransferHandler(arrayListHandler);
        list2.setDragEnabled(true);
        JScrollPane list2View = new JScrollPane(list2);
        list2View.setPreferredSize(new Dimension(200, 100));
        JPanel panel2 = new JPanel();
        panel2.setLayout(new BorderLayout());
        panel2.add(list2View, BorderLayout.CENTER);
        panel2.setBorder(BorderFactory.createEmptyBorder(5,5,5,5));

        setLayout(new BorderLayout());
        add(panel1, BorderLayout.LINE_START);
        add(panel2, BorderLayout.LINE_END);
        setBorder(BorderFactory.createEmptyBorder(20,20,20,20));
    }

    /**
     * Create the GUI and show it.  For thread safety,
     * this method should be invoked from the
     * event-dispatching thread.
     */
    private static void createAndShowGUI() {
        //Make sure we have nice window decorations.
        JFrame.setDefaultLookAndFeelDecorated(true);

        //Create and set up the window.
        JFrame frame = new JFrame("DragListDemo");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        //Create and set up the content pane.
        DragListDemo demo = new DragListDemo();
        frame.setContentPane(demo);

        //Display the window.
        frame.pack();
        frame.setVisible(true);
    }

    public static void main(String[] args) {
        //Schedule a job for the event-dispatching thread:
        //creating and showing this application's GUI.
        javax.swing.SwingUtilities.invokeLater(new Runnable() {
            public void run() {
                createAndShowGUI();
            }
        });
    }
}