Re: Swing component to di

"John B. Matthews" <john.b..matthews@THRWHITE.remove-dii-this>
Wed, 27 Apr 2011 15:50:35 GMT
In article <4915ae3d$0$6077$>,
 Daniel Pitts <> wrote: wrote:

I need to display a combination of text, diagrams and MathML based
formulas on a swing component in a way that, say, when you hover
the mouse or click on parts of the text, the corresponding parts in
the diagrams and/or formulas get highlighted or some action happens
on them
I did a search on:
MathML formula swing class "import java "
which gave me nothing useful
What would be the right swing text container/components to use? Do
you know of any example of such a thing out there?

googling for just mathml java turned up

Might be a good place to start.

You might have to actually write some code if nothing fits out-of-the-box.

For text and diagrams, an HTMLDocument, which implements the Document
interface, might suffice:


import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.EventQueue;
import java.awt.GridLayout;
import javax.swing.JEditorPane;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.event.DocumentEvent;
import javax.swing.event.DocumentListener;
import javax.swing.event.HyperlinkEvent;
import javax.swing.event.HyperlinkListener;
import javax.swing.text.BadLocationException;
import javax.swing.text.Document;

/** @author John B. Matthews */
public class HtmlView extends JPanel
    implements DocumentListener, HyperlinkListener {

    private static final String name = "";
    JEditorPane jep;
    Document doc;

    public HtmlView() {
        this.setLayout(new GridLayout(1, 1));
        jep = new JEditorPane();
        loadPage(jep, name);
        doc = jep.getDocument();
        JScrollPane sp = new JScrollPane(jep);
        this.setPreferredSize(new Dimension(640, 480));

    private void loadPage(JEditorPane jep, String name) {
        try {
        } catch (IOException ioe) {

    public void insertUpdate(DocumentEvent e) {}
    public void removeUpdate(DocumentEvent e) {}
    public void changedUpdate(DocumentEvent e) {
        try {
            System.out.println(doc.getText(0, doc.getLength()));
        } catch (BadLocationException ble) {

    public void hyperlinkUpdate(HyperlinkEvent e) {
        HyperlinkEvent.EventType type = e.getEventType();
        final URL url = e.getURL();
        if (type == HyperlinkEvent.EventType.ENTERED) {
            System.out.println("URL: " + url);
        } else if (type == HyperlinkEvent.EventType.ACTIVATED) {
            System.out.println("Following link...");
            try {
            } catch (IOException ioException) {
                System.out.println("Invalid link");

    public static void main(String[] args) {
        EventQueue.invokeLater(new Runnable() {
            public void run() {
                JFrame f = new JFrame();
                f.add(new HtmlView(), BorderLayout.CENTER);

I don't know about MathML, but you might look for a corresponding
implementation of the Document interface.

John B. Matthews
trashgod at gmail dot com

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