Creating TextArea with Undo, Redo Capabilities : Undo Redo « Swing JFC « Java

Home
Java
1.2D Graphics GUI
2.3D
3.Advanced Graphics
4.Ant
5.Apache Common
6.Chart
7.Class
8.Collections Data Structure
9.Data Type
10.Database SQL JDBC
11.Design Pattern
12.Development Class
13.EJB3
14.Email
15.Event
16.File Input Output
17.Game
18.Generics
19.GWT
20.Hibernate
21.I18N
22.J2EE
23.J2ME
24.JDK 6
25.JNDI LDAP
26.JPA
27.JSP
28.JSTL
29.Language Basics
30.Network Protocol
31.PDF RTF
32.Reflection
33.Regular Expressions
34.Scripting
35.Security
36.Servlets
37.Spring
38.Swing Components
39.Swing JFC
40.SWT JFace Eclipse
41.Threads
42.Tiny Application
43.Velocity
44.Web Services SOA
45.XML
Java » Swing JFC » Undo RedoScreenshots 
Creating TextArea with Undo, Redo Capabilities
  
import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.Toolkit;
import java.awt.event.FocusEvent;
import java.awt.event.FocusListener;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;

import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.event.UndoableEditEvent;
import javax.swing.event.UndoableEditListener;
import javax.swing.undo.CannotRedoException;
import javax.swing.undo.CannotUndoException;
import javax.swing.undo.UndoManager;

class UndoableTextArea extends JTextArea implements UndoableEditListener, FocusListener,
    KeyListener {
  private UndoManager m_undoManager;

  public UndoableTextArea() {
    this(new String());
  }

  public UndoableTextArea(String text) {
    super(text);
    getDocument().addUndoableEditListener(this);
    this.addKeyListener(this);
    this.addFocusListener(this);
  }

  private void createUndoMananger() {
    m_undoManager = new UndoManager();
    m_undoManager.setLimit(10);
  }

  private void removeUndoMananger() {
    m_undoManager.end();
  }

  public void focusGained(FocusEvent fe) {
    createUndoMananger();
  }

  public void focusLost(FocusEvent fe) {
    removeUndoMananger();
  }

  public void undoableEditHappened(UndoableEditEvent e) {
    m_undoManager.addEdit(e.getEdit());
  }

  public void keyPressed(KeyEvent e) {
    if ((e.getKeyCode() == KeyEvent.VK_Z&& (e.isControlDown())) {
      try {
        m_undoManager.undo();
      catch (CannotUndoException cue) {
        Toolkit.getDefaultToolkit().beep();
      }
    }

    if ((e.getKeyCode() == KeyEvent.VK_Y&& (e.isControlDown())) {
      try {
        m_undoManager.redo();
      catch (CannotRedoException cue) {
        Toolkit.getDefaultToolkit().beep();
      }
    }
  }

  public void keyReleased(KeyEvent e) {
  }

  public void keyTyped(KeyEvent e) {
  }
}

public class Main extends JFrame {
  UndoableTextArea m_undoableTextArea = new UndoableTextArea();

  public Main() {
    JScrollPane sc = new JScrollPane(m_undoableTextArea);
    getContentPane().setLayout(new BorderLayout(1010));
    getContentPane()
        .add(BorderLayout.NORTH, new JLabel("Press, CTRL+Z to Undo, CTRL+Y to Redo..."));
    getContentPane().add(BorderLayout.CENTER, sc);
  }

  public static void main(String[] arg) {
    Main m = new Main();
    m.setVisible(true);
    m.setSize(new Dimension(400300));
    m.validate();
  }
}

   
    
  
Related examples in the same category
1.The use of UndoableToggleEditThe use of UndoableToggleEdit
2.The use of StateEdit(able)The use of StateEdit(able)
3.The use of UndoManagerThe use of UndoManager
4.A sample app showing the use of UndoableToggleEdit and CompoundEditA sample app showing the use of UndoableToggleEdit and CompoundEdit
5.An example that shows lots of little UndoManager detailsAn example that shows lots of little UndoManager details
6.Undo redo textareaUndo redo textarea
7.Undo managerUndo manager
8.Simple GUI demo of UndoManager and friendsSimple GUI demo of UndoManager and friends
9.Undo Example 1Undo Example 1
10.Undo Example 2Undo Example 2
11.Undo Example 3Undo Example 3
12.Undo Example 4Undo Example 4
13.Undo Example 5Undo Example 5
14.Undo Example 6Undo Example 6
15.Undoable Drawing Panel 2Undoable Drawing Panel 2
16.Undo DrawingUndo Drawing
17.Undo Example 7Undo Example 7
18.Add Undo and Redo to a text component
19.Add undo support to the StyleFrame exampleAdd undo support to the StyleFrame example
20.Adding Undo and Redo to a Text Component
21.Create a redo action and add it to the text component (JTextComponent)
22.Listen for undo and redo events
23.Create an undo action and add it to the text component
24.Bind the undo action to ctl-Z
java2s.com  | Contact Us | Privacy Policy
Copyright 2009 - 12 Demo Source and Support. All rights reserved.
All other trademarks are property of their respective owners.