Bi-Directional Text : TextPane « Swing JFC « Java

Bi-Directional Text

Bi-Directional Text
Core SWING Advanced Programming 
By Kim Topley
ISBN: 0 13 083292 8       
Publisher: Prentice Hall  

Bi-Directional Text. Model Order and Visual Order. Caret Position and the Selection. 
How Bi-Directional Text Is Handled in the Swing Text Components.


import java.awt.Font;
import java.awt.GraphicsEnvironment;

import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTextPane;
import javax.swing.SwingUtilities;
import javax.swing.UIManager;
import javax.swing.event.CaretEvent;
import javax.swing.event.CaretListener;
import javax.swing.text.AbstractDocument;
import javax.swing.text.BadLocationException;
import javax.swing.text.Document;
import javax.swing.text.JTextComponent;
import javax.swing.text.View;

public class BidiTextExample {
  public static void main(String[] args) {
    try {
    } catch (Exception evt) {}
    JFrame f = new JFrame("Bi-directional Text");
    final JTextPane tp = new JTextPane();

    if (args.length > 0 && args[0].equalsIgnoreCase("Arabic")) {
      System.out.println("Using physical font");
      Font font = new Font("Lucida Sans Regular", Font.PLAIN, 32);
    } else {
      Font font = new Font("Serif", Font.PLAIN, 32);

    String s = new String(new char[] { (char) 'A', (char) 0xFE76,
        (char) 0xFE77, (char) 0xFE78, (char) 'Z' });

    final AbstractDocument doc = (AbstractDocument) tp.getDocument();
    System.out.println("i18n property is " + doc.getProperty("i18n"));

    // Turn on bi-directional text
    doc.putProperty("i18n", Boolean.TRUE);
    try {
      doc.insertString(0, s, null);
    } catch (Exception e) {

    f.getContentPane().add(new JScrollPane(tp));
    f.setSize(300, 300);
    tp.addCaretListener(new CaretListener() {
      public void caretUpdate(CaretEvent evt) {
        System.out.println("Caret position is " + evt.getDot());

    try {
      SwingUtilities.invokeLater(new Runnable() {
        public void run() {
          // Dump the model

          // Show the views
          ViewDisplayer.displayViews(tp, System.out);
    } catch (Exception e) {

class ViewDisplayer {
  public static void displayViews(JTextComponent comp, PrintStream out) {
    View rootView = comp.getUI().getRootView(comp);
    displayView(rootView, 0, comp.getDocument(), out);

  public static void displayView(View view, int indent, Document doc,
      PrintStream out) {
    String name = view.getClass().getName();
    for (int i = 0; i < indent; i++) {

    int start = view.getStartOffset();
    int end = view.getEndOffset();
    out.println(name + "; offsets [" + start + ", " + end + "]");
    int viewCount = view.getViewCount();
    if (viewCount == 0) {
      int length = Math.min(32, end - start);
      try {
        String txt = doc.getText(start, length);
        for (int i = 0; i < indent + 1; i++) {
        out.println("[" + txt + "]");
      } catch (BadLocationException e) {
    } else {
      for (int i = 0; i < viewCount; i++) {
        displayView(view.getView(i), indent + 1, doc, out);

Related examples in the same category

1.TextPane SampleTextPane Sample
2.Brower based on JEditorPaneBrower based on JEditorPane
3.JTextPane demo with various format and html loading and renderingJTextPane demo with various format and html loading and rendering
4.Styled TextStyled Text
5.Appending TextPaneAppending TextPane
6.Text Component DisplayText Component Display
7.JTextPane Styles Example 1JTextPane Styles Example 1
8.JTextPane Styles Example 2JTextPane Styles Example 2
9.JTextPane Styles Example 3JTextPane Styles Example 3
10.JTextPane Styles Example 4JTextPane Styles Example 4
11.JTextPane Styles Example 5JTextPane Styles Example 5
12.JTextPane Styles Example 6JTextPane Styles Example 6
13.JTextPane Styles Example 7JTextPane Styles Example 7
14.JTextPane Styles Example 8JTextPane Styles Example 8
15.JTextPane Highlight ExampleJTextPane Highlight Example
16.JTextPane Extended Paragraph Example
17.TextPane ElementsTextPane Elements
18.TextPane Views 2TextPane Views 2
19.List HTML ValuesList HTML Values
20.Show HTML Document
21.Show HTML Views
22.JEditorPane Replace ReaderJEditorPane Replace Reader
23.TextPane: DocumentEvent TextPane: DocumentEvent
24.Show how Icons, Components, and text can be added to a JTextPaneShow how Icons, Components, and text can be added to a JTextPane
25.Parentheses matcherParentheses matcher
26.A TabSet in a JTextPaneA TabSet in a JTextPane
27.Extension of JTextPane that allows the user to easily append colored text to the documentExtension of JTextPane that allows the user to easily append colored text to the document
28.An implementation of HighlightPainter that underlines text with a thick lineAn implementation of HighlightPainter that underlines text with a thick line
29.An example of highlighting multiple, discontiguous regions of a text component.An example of highlighting multiple, discontiguous regions of a text component.
30.A custom caret classA custom caret class
31.Enumerating the Paragraphs of a JTextPane Component
32.Inserting an Image into a JTextPane Component
33.Inserting a Component into a JTextPane Component
34.Customizing Tab Stops in a JTextPane Component
35.Sharing Styles Between JTextPanes
36.Listing the Styles Associated with a JTextPane
37.Listing the Attributes in a Style
38.Replace style
39.Set logical style; replaces paragraph style's parent
40.Get logical style and restore it after new paragraph style
41.Determining If a Style Attribute Applies to a Character or the Paragraph
42.Determine if the attribute is a color or a font-related attribute.
43.Create a tab set from the tab stops
44.Foreground color
45.Background color
46.Change the Font size of JTextPane
47.Font family
48.Bold style
49.An example of several text components including password fields and formatted fields.An example of several text components including password fields and formatted fields.
50.A style can have multiple attributes; this one makes text bold and italic
51.Duplicate style
52.Italicize the entire paragraph containing the position 12
53.Inserting Styled Text in a JTextPane Component
54.A separation of a data from the visual representation. In a JTextPane component, we have a StyledDocument for setting the style of the text data.
55.Tests two attributed strings for equality.
56.Get Leading White Space
57.Get Leading White Space Width
58.Get Max Fitting FontSize
59.Reads a AttributedString object that has been serialised by the SerialUtilities.writeAttributedString(AttributedString, ObjectOutputStream)} method.