ModifyModelSample.java Source code

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Here is the source code for ModifyModelSample.java

Source

/*
Definitive Guide to Swing for Java 2, Second Edition
By John Zukowski       
ISBN: 1-893115-78-X
Publisher: APress
*/

import java.awt.BorderLayout;
import java.awt.Container;
import java.awt.FlowLayout;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.PrintWriter;
import java.io.StringWriter;
import java.util.Enumeration;

import javax.swing.DefaultListModel;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JList;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.event.ListDataEvent;
import javax.swing.event.ListDataListener;

public class ModifyModelSample {
    static String labels[] = { "Chardonnay", "Sauvignon", "Riesling", "Cabernet", "Zinfandel", "Merlot",
            "Pinot Noir", "Sauvignon Blanc", "Syrah", "Gewurztraminer" };

    public static void main(String args[]) {
        JFrame frame = new JFrame("Modifying Model");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        Container contentPane = frame.getContentPane();

        // Fill model
        final DefaultListModel model = new DefaultListModel();
        for (int i = 0, n = labels.length; i < n; i++) {
            model.addElement(labels[i]);
        }
        JList jlist = new JList(model);
        JScrollPane scrollPane1 = new JScrollPane(jlist);
        contentPane.add(scrollPane1, BorderLayout.WEST);

        final JTextArea textArea = new JTextArea();
        textArea.setEditable(false);
        JScrollPane scrollPane2 = new JScrollPane(textArea);
        contentPane.add(scrollPane2, BorderLayout.CENTER);

        ListDataListener listDataListener = new ListDataListener() {
            public void contentsChanged(ListDataEvent listDataEvent) {
                appendEvent(listDataEvent);
            }

            public void intervalAdded(ListDataEvent listDataEvent) {
                appendEvent(listDataEvent);
            }

            public void intervalRemoved(ListDataEvent listDataEvent) {
                appendEvent(listDataEvent);
            }

            private void appendEvent(ListDataEvent listDataEvent) {
                StringWriter sw = new StringWriter();
                PrintWriter pw = new PrintWriter(sw);
                switch (listDataEvent.getType()) {
                case ListDataEvent.CONTENTS_CHANGED:
                    pw.print("Type: Contents Changed");
                    break;
                case ListDataEvent.INTERVAL_ADDED:
                    pw.print("Type: Interval Added");
                    break;
                case ListDataEvent.INTERVAL_REMOVED:
                    pw.print("Type: Interval Removed");
                    break;
                }
                pw.print(", Index0: " + listDataEvent.getIndex0());
                pw.print(", Index1: " + listDataEvent.getIndex1());
                DefaultListModel theModel = (DefaultListModel) listDataEvent.getSource();
                Enumeration elements = theModel.elements();
                pw.print(", Elements: ");
                while (elements.hasMoreElements()) {
                    pw.print(elements.nextElement());
                    pw.print(",");
                }
                pw.println();
                textArea.append(sw.toString());
            }
        };

        model.addListDataListener(listDataListener);

        // Setup buttons
        JPanel jp = new JPanel(new GridLayout(2, 1));
        JPanel jp1 = new JPanel(new FlowLayout(FlowLayout.CENTER, 1, 1));
        JPanel jp2 = new JPanel(new FlowLayout(FlowLayout.CENTER, 1, 1));
        jp.add(jp1);
        jp.add(jp2);
        JButton jb = new JButton("add F");
        jp1.add(jb);
        jb.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent actionEvent) {
                model.add(0, "First");
            }
        });
        jb = new JButton("addElement L");
        jp1.add(jb);
        jb.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent actionEvent) {
                model.addElement("Last");
            }
        });
        jb = new JButton("insertElementAt M");
        jp1.add(jb);
        jb.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent actionEvent) {
                int size = model.getSize();
                model.insertElementAt("Middle", size / 2);
            }
        });
        jb = new JButton("set F");
        jp1.add(jb);
        jb.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent actionEvent) {
                int size = model.getSize();
                if (size != 0)
                    model.set(0, "New First");
            }
        });
        jb = new JButton("setElementAt L");
        jp1.add(jb);
        jb.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent actionEvent) {
                int size = model.getSize();
                if (size != 0)
                    model.setElementAt("New Last", size - 1);
            }
        });
        jb = new JButton("load 10");
        jp1.add(jb);
        jb.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent actionEvent) {
                for (int i = 0, n = labels.length; i < n; i++) {
                    model.addElement(labels[i]);
                }
            }
        });
        jb = new JButton("clear");
        jp2.add(jb);
        jb.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent actionEvent) {
                model.clear();
            }
        });
        jb = new JButton("remove F");
        jp2.add(jb);
        jb.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent actionEvent) {
                int size = model.getSize();
                if (size != 0)
                    model.remove(0);
            }
        });
        jb = new JButton("removeAllElements");
        jp2.add(jb);
        jb.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent actionEvent) {
                model.removeAllElements();
            }
        });
        jb = new JButton("removeElement 'Last'");
        jp2.add(jb);
        jb.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent actionEvent) {
                model.removeElement("Last");
            }
        });
        jb = new JButton("removeElementAt M");
        jp2.add(jb);
        jb.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent actionEvent) {
                int size = model.getSize();
                if (size != 0)
                    model.removeElementAt(size / 2);
            }
        });
        jb = new JButton("removeRange FM");
        jp2.add(jb);
        jb.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent actionEvent) {
                int size = model.getSize();
                if (size != 0)
                    model.removeRange(0, size / 2);
            }
        });
        contentPane.add(jp, BorderLayout.SOUTH);
        frame.setSize(640, 300);
        frame.setVisible(true);
    }
}