Example usage for javax.swing.text EditorKit write

List of usage examples for javax.swing.text EditorKit write

Introduction

In this page you can find the example usage for javax.swing.text EditorKit write.

Prototype

public abstract void write(Writer out, Document doc, int pos, int len) throws IOException, BadLocationException;

Source Link

Document

Writes content from a document to the given stream in a format appropriate for this kind of content handler.

Usage

From source file:EditorPaneExample7.java

public EditorPaneExample7() {
    super("JEditorPane Example 7");

    pane = new JEditorPane();
    pane.setEditable(false); // Start read-only
    getContentPane().add(new JScrollPane(pane), "Center");

    // Build the panel of controls
    JPanel panel = new JPanel();

    panel.setLayout(new GridBagLayout());
    GridBagConstraints c = new GridBagConstraints();
    c.gridwidth = 1;//w  ww . jav  a 2s.  c o m
    c.gridheight = 1;
    c.anchor = GridBagConstraints.EAST;
    c.fill = GridBagConstraints.NONE;
    c.weightx = 0.0;
    c.weighty = 0.0;

    JLabel urlLabel = new JLabel("File name: ", JLabel.RIGHT);
    panel.add(urlLabel, c);
    JLabel loadingLabel = new JLabel("State: ", JLabel.RIGHT);
    c.gridy = 1;
    panel.add(loadingLabel, c);
    JLabel typeLabel = new JLabel("Type: ", JLabel.RIGHT);
    c.gridy = 2;
    panel.add(typeLabel, c);

    c.gridx = 1;
    c.gridy = 0;
    c.gridwidth = 1;
    c.weightx = 1.0;
    c.fill = GridBagConstraints.HORIZONTAL;

    textField = new JTextField(32);
    panel.add(textField, c);
    loadingState = new JLabel(spaces, JLabel.LEFT);
    loadingState.setForeground(Color.black);
    c.gridy = 1;
    c.gridwidth = 2;
    panel.add(loadingState, c);
    loadedType = new JLabel(spaces, JLabel.LEFT);
    loadedType.setForeground(Color.black);
    c.gridy = 2;
    panel.add(loadedType, c);

    getContentPane().add(panel, "South");

    panel = new JPanel();
    panel.setLayout(new BoxLayout(panel, BoxLayout.Y_AXIS));

    saveButton = new JButton("Save");
    plain = new JCheckBox("Plain Text");
    html = new JCheckBox("HTML");
    rtf = new JCheckBox("RTF");
    panel.add(plain);
    panel.add(html);
    panel.add(rtf);

    ButtonGroup group = new ButtonGroup();
    group.add(plain);
    group.add(html);
    group.add(rtf);
    plain.setSelected(true);

    panel.add(Box.createVerticalStrut(10));
    panel.add(saveButton);
    panel.add(Box.createVerticalGlue());
    panel.setBorder(BorderFactory.createEmptyBorder(2, 4, 2, 4));

    getContentPane().add(panel, "East");

    // Change page based on text field
    textField.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent evt) {
            String fileName = textField.getText().trim();
            file = new File(fileName);
            absolutePath = file.getAbsolutePath();
            String url = "file:///" + absolutePath;

            try {
                // Check if the new page and the old
                // page are the same.
                URL newURL = new URL(url);
                URL loadedURL = pane.getPage();
                if (loadedURL != null && loadedURL.sameFile(newURL)) {
                    return;
                }

                // Try to display the page
                textField.setEnabled(false); // Disable input
                textField.paintImmediately(0, 0, textField.getSize().width, textField.getSize().height);

                saveButton.setEnabled(false);
                saveButton.paintImmediately(0, 0, saveButton.getSize().width, saveButton.getSize().height);
                setCursor(Cursor.getPredefinedCursor(Cursor.WAIT_CURSOR));
                // Busy cursor
                loadingState.setText("Loading...");
                loadingState.paintImmediately(0, 0, loadingState.getSize().width,
                        loadingState.getSize().height);
                loadedType.setText("");
                loadedType.paintImmediately(0, 0, loadedType.getSize().width, loadedType.getSize().height);
                pane.setEditable(false);
                pane.setPage(url);

                loadedType.setText(pane.getContentType());
            } catch (Exception e) {
                JOptionPane.showMessageDialog(pane, new String[] { "Unable to open file", url },
                        "File Open Error", JOptionPane.ERROR_MESSAGE);
                loadingState.setText("Failed");
                textField.setEnabled(true);
                setCursor(Cursor.getDefaultCursor());
            }
        }
    });

    // Listen for page load to complete
    pane.addPropertyChangeListener(new PropertyChangeListener() {
        public void propertyChange(PropertyChangeEvent evt) {
            if (evt.getPropertyName().equals("page")) {
                loadingState.setText("Page loaded.");

                textField.setEnabled(true); // Allow entry of new file name
                textField.requestFocus();
                setCursor(Cursor.getDefaultCursor());

                // Allow editing and saving if appropriate
                pane.setEditable(file.canWrite());
                saveButton.setEnabled(file.canWrite());
            }
        }
    });

    saveButton.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent evt) {
            Writer w = null;
            OutputStream os = System.out;
            String contentType;
            if (plain.isSelected()) {
                contentType = "text/plain";
                w = new OutputStreamWriter(os);
            } else if (html.isSelected()) {
                contentType = "text/html";
                w = new OutputStreamWriter(os);
            } else {
                contentType = "text/rtf";
            }

            EditorKit kit = pane.getEditorKitForContentType(contentType);
            try {
                if (w != null) {
                    kit.write(w, pane.getDocument(), 0, pane.getDocument().getLength());
                    w.flush();
                } else {
                    kit.write(os, pane.getDocument(), 0, pane.getDocument().getLength());
                    os.flush();
                }
            } catch (Exception e) {
                System.out.println("Write failed");
            }
        }
    });
}

From source file:EditorPaneExample19.java

public EditorPaneExample19() {
    super("JEditorPane Example 19");

    pane = new JEditorPane();
    pane.setEditable(true); // Editable
    getContentPane().add(new JScrollPane(pane), "Center");

    // Add a menu bar
    menuBar = new JMenuBar();
    setJMenuBar(menuBar);/*w w w  .j  av a  2s  .  c o  m*/

    // Populate it
    createMenuBar();

    // Build the panel of controls
    JPanel panel = new JPanel();

    panel.setLayout(new GridBagLayout());
    GridBagConstraints c = new GridBagConstraints();
    c.gridwidth = 1;
    c.gridheight = 1;
    c.anchor = GridBagConstraints.EAST;
    c.fill = GridBagConstraints.NONE;
    c.weightx = 0.0;
    c.weighty = 0.0;

    JLabel urlLabel = new JLabel("URL: ", JLabel.RIGHT);
    panel.add(urlLabel, c);
    JLabel loadingLabel = new JLabel("State: ", JLabel.RIGHT);
    c.gridy = 1;
    panel.add(loadingLabel, c);
    JLabel typeLabel = new JLabel("Type: ", JLabel.RIGHT);
    c.gridy = 2;
    panel.add(typeLabel, c);
    c.gridy = 3;
    panel.add(new JLabel(LOAD_TIME), c);

    c.gridy = 4;
    c.gridwidth = 2;
    c.weightx = 1.0;
    c.anchor = GridBagConstraints.WEST;
    onlineLoad = new JCheckBox("Online Load");
    panel.add(onlineLoad, c);
    onlineLoad.setSelected(true);
    onlineLoad.setForeground(typeLabel.getForeground());

    c.gridy = 5;
    c.gridwidth = 2;
    c.weightx = 1.0;
    c.anchor = GridBagConstraints.WEST;
    editableBox = new JCheckBox("Editable JEditorPane");
    panel.add(editableBox, c);
    editableBox.setSelected(true);
    editableBox.setForeground(typeLabel.getForeground());

    c.gridy = 6;
    c.weightx = 0.0;
    JButton saveButton = new JButton("Save");
    panel.add(saveButton, c);
    saveButton.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent evt) {
            EditorKit kit = pane.getEditorKit();
            try {
                if (kit instanceof RTFEditorKit) {
                    kit.write(System.out, pane.getDocument(), 0, pane.getDocument().getLength());
                    System.out.flush();
                } else {
                    if (writer == null) {
                        writer = new OutputStreamWriter(System.out);
                        pane.write(writer);
                        writer.flush();
                    }
                    kit.write(writer, pane.getDocument(), 0, pane.getDocument().getLength());
                    writer.flush();
                }
            } catch (Exception e) {
                System.out.println("Write failed");
            }
        }
    });

    c.gridx = 1;
    c.gridy = 0;
    c.weightx = 1.0;
    c.anchor = GridBagConstraints.EAST;
    c.fill = GridBagConstraints.HORIZONTAL;

    urlCombo = new JComboBox();
    panel.add(urlCombo, c);
    urlCombo.setEditable(true);
    loadingState = new JLabel(spaces, JLabel.LEFT);
    loadingState.setForeground(Color.black);
    c.gridy = 1;
    panel.add(loadingState, c);
    loadedType = new JLabel(spaces, JLabel.LEFT);
    loadedType.setForeground(Color.black);
    c.gridy = 2;
    panel.add(loadedType, c);
    timeLabel = new JLabel("");
    c.gridy = 3;
    panel.add(timeLabel, c);

    getContentPane().add(panel, "South");

    // Register a custom EditorKit for HTML
    ClassLoader loader = getClass().getClassLoader();
    if (loader != null) {
        // Java 2
        JEditorPane.registerEditorKitForContentType("text/html", "AdvancedSwing.Chapter4.EnhancedHTMLEditorKit",
                loader);
    } else {
        // JDK 1.1
        JEditorPane.registerEditorKitForContentType("text/html",
                "AdvancedSwing.Chapter4.EnhancedHTMLEditorKit");
    }

    // Allocate the empty tree model
    DefaultMutableTreeNode emptyRootNode = new DefaultMutableTreeNode("Empty");
    emptyModel = new DefaultTreeModel(emptyRootNode);

    // Create and place the heading tree
    tree = new JTree(emptyModel);
    tree.setPreferredSize(new Dimension(200, 200));
    getContentPane().add(new JScrollPane(tree), "East");

    // Change page based on combo selection
    urlCombo.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent evt) {
            if (populatingCombo == true) {
                return;
            }
            Object selection = urlCombo.getSelectedItem();
            loadNewPage(selection);
        }
    });

    // Change editability based on the checkbox
    editableBox.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent evt) {
            pane.setEditable(editableBox.isSelected());
            pane.revalidate();
            pane.repaint();
        }
    });

    // Listen for page load to complete
    pane.addPropertyChangeListener(new PropertyChangeListener() {
        public void propertyChange(PropertyChangeEvent evt) {
            if (evt.getPropertyName().equals("page")) {
                loadComplete();
                displayLoadTime();
                populateCombo(findLinks(pane.getDocument(), null));
                TreeNode node = buildHeadingTree(pane.getDocument());
                tree.setModel(new DefaultTreeModel(node));

                createMenuBar();
                enableMenuBar(true);
                getRootPane().revalidate();

                enableInput();
                loadingPage = false;
            }
        }
    });

    // Listener for tree selection
    tree.addTreeSelectionListener(new TreeSelectionListener() {
        public void valueChanged(TreeSelectionEvent evt) {
            TreePath path = evt.getNewLeadSelectionPath();
            if (path != null) {
                DefaultMutableTreeNode node = (DefaultMutableTreeNode) path.getLastPathComponent();
                Object userObject = node.getUserObject();
                if (userObject instanceof Heading) {
                    Heading heading = (Heading) userObject;
                    try {
                        Rectangle textRect = pane.modelToView(heading.getOffset());
                        textRect.y += 3 * textRect.height;
                        pane.scrollRectToVisible(textRect);
                    } catch (BadLocationException e) {
                    }
                }
            }
        }
    });

    // Listener for hypertext events
    pane.addHyperlinkListener(new HyperlinkListener() {
        public void hyperlinkUpdate(HyperlinkEvent evt) {
            // Ignore hyperlink events if the frame is busy
            if (loadingPage == true) {
                return;
            }
            if (evt.getEventType() == HyperlinkEvent.EventType.ACTIVATED) {
                JEditorPane sp = (JEditorPane) evt.getSource();
                if (evt instanceof HTMLFrameHyperlinkEvent) {
                    HTMLDocument doc = (HTMLDocument) sp.getDocument();
                    doc.processHTMLFrameHyperlinkEvent((HTMLFrameHyperlinkEvent) evt);
                } else {
                    loadNewPage(evt.getURL());
                }
            } else if (evt.getEventType() == HyperlinkEvent.EventType.ENTERED) {
                pane.setCursor(handCursor);
            } else if (evt.getEventType() == HyperlinkEvent.EventType.EXITED) {
                pane.setCursor(defaultCursor);
            }
        }
    });
}

From source file:EditorPaneExample18.java

public EditorPaneExample18() {
    super("JEditorPane Example 18");

    pane = new JEditorPane();
    pane.setEditable(true); // Editable
    getContentPane().add(new JScrollPane(pane), "Center");

    // Add a menu bar
    menuBar = new JMenuBar();
    setJMenuBar(menuBar);/* w  ww  . j ava2 s  .c  o m*/

    // Populate it
    createMenuBar();

    // Build the panel of controls
    JPanel panel = new JPanel();

    panel.setLayout(new GridBagLayout());
    GridBagConstraints c = new GridBagConstraints();
    c.gridwidth = 1;
    c.gridheight = 1;
    c.anchor = GridBagConstraints.EAST;
    c.fill = GridBagConstraints.NONE;
    c.weightx = 0.0;
    c.weighty = 0.0;

    JLabel urlLabel = new JLabel("URL: ", JLabel.RIGHT);
    panel.add(urlLabel, c);
    JLabel loadingLabel = new JLabel("State: ", JLabel.RIGHT);
    c.gridy = 1;
    panel.add(loadingLabel, c);
    JLabel typeLabel = new JLabel("Type: ", JLabel.RIGHT);
    c.gridy = 2;
    panel.add(typeLabel, c);
    c.gridy = 3;
    panel.add(new JLabel(LOAD_TIME), c);

    c.gridy = 4;
    c.gridwidth = 2;
    c.weightx = 1.0;
    c.anchor = GridBagConstraints.WEST;
    onlineLoad = new JCheckBox("Online Load");
    panel.add(onlineLoad, c);
    onlineLoad.setSelected(true);
    onlineLoad.setForeground(typeLabel.getForeground());

    c.gridy = 5;
    c.gridwidth = 2;
    c.weightx = 1.0;
    c.anchor = GridBagConstraints.WEST;
    editableBox = new JCheckBox("Editable JEditorPane");
    panel.add(editableBox, c);
    editableBox.setSelected(true);
    editableBox.setForeground(typeLabel.getForeground());

    c.gridy = 6;
    c.weightx = 0.0;
    JButton saveButton = new JButton("Save");
    panel.add(saveButton, c);
    saveButton.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent evt) {
            EditorKit kit = pane.getEditorKit();
            try {
                if (kit instanceof RTFEditorKit) {
                    kit.write(System.out, pane.getDocument(), 0, pane.getDocument().getLength());
                    System.out.flush();
                } else {
                    if (writer == null) {
                        writer = new OutputStreamWriter(System.out);
                        pane.write(writer);
                        writer.flush();
                    }
                    kit.write(writer, pane.getDocument(), 0, pane.getDocument().getLength());
                    writer.flush();
                }
            } catch (Exception e) {
                System.out.println("Write failed");
            }
        }
    });

    c.gridx = 1;
    c.gridy = 0;
    c.weightx = 1.0;
    c.anchor = GridBagConstraints.EAST;
    c.fill = GridBagConstraints.HORIZONTAL;

    urlCombo = new JComboBox();
    panel.add(urlCombo, c);
    urlCombo.setEditable(true);
    loadingState = new JLabel(spaces, JLabel.LEFT);
    loadingState.setForeground(Color.black);
    c.gridy = 1;
    panel.add(loadingState, c);
    loadedType = new JLabel(spaces, JLabel.LEFT);
    loadedType.setForeground(Color.black);
    c.gridy = 2;
    panel.add(loadedType, c);
    timeLabel = new JLabel("");
    c.gridy = 3;
    panel.add(timeLabel, c);

    getContentPane().add(panel, "South");

    // Register a custom EditorKit for HTML
    ClassLoader loader = getClass().getClassLoader();
    if (loader != null) {
        // Java 2
        JEditorPane.registerEditorKitForContentType("text/html",
                "AdvancedSwing.Chapter4.HiddenViewHTMLEditorKit", loader);
    } else {
        // JDK 1.1
        JEditorPane.registerEditorKitForContentType("text/html",
                "AdvancedSwing.Chapter4.HiddenViewHTMLEditorKit");
    }

    // Allocate the empty tree model
    DefaultMutableTreeNode emptyRootNode = new DefaultMutableTreeNode("Empty");
    emptyModel = new DefaultTreeModel(emptyRootNode);

    // Create and place the heading tree
    tree = new JTree(emptyModel);
    tree.setPreferredSize(new Dimension(200, 200));
    getContentPane().add(new JScrollPane(tree), "East");

    // Change page based on combo selection
    urlCombo.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent evt) {
            if (populatingCombo == true) {
                return;
            }
            Object selection = urlCombo.getSelectedItem();
            loadNewPage(selection);
        }
    });

    // Change editability based on the checkbox
    editableBox.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent evt) {
            pane.setEditable(editableBox.isSelected());
            pane.revalidate();
            pane.repaint();
        }
    });

    // Listen for page load to complete
    pane.addPropertyChangeListener(new PropertyChangeListener() {
        public void propertyChange(PropertyChangeEvent evt) {
            if (evt.getPropertyName().equals("page")) {
                loadComplete();
                displayLoadTime();
                populateCombo(findLinks(pane.getDocument(), null));
                TreeNode node = buildHeadingTree(pane.getDocument());
                tree.setModel(new DefaultTreeModel(node));

                createMenuBar();
                enableMenuBar(true);
                getRootPane().revalidate();

                enableInput();
                loadingPage = false;
            }
        }
    });

    // Listener for tree selection
    tree.addTreeSelectionListener(new TreeSelectionListener() {
        public void valueChanged(TreeSelectionEvent evt) {
            TreePath path = evt.getNewLeadSelectionPath();
            if (path != null) {
                DefaultMutableTreeNode node = (DefaultMutableTreeNode) path.getLastPathComponent();
                Object userObject = node.getUserObject();
                if (userObject instanceof Heading) {
                    Heading heading = (Heading) userObject;
                    try {
                        Rectangle textRect = pane.modelToView(heading.getOffset());
                        textRect.y += 3 * textRect.height;
                        pane.scrollRectToVisible(textRect);
                    } catch (BadLocationException e) {
                    }
                }
            }
        }
    });

    // Listener for hypertext events
    pane.addHyperlinkListener(new HyperlinkListener() {
        public void hyperlinkUpdate(HyperlinkEvent evt) {
            // Ignore hyperlink events if the frame is busy
            if (loadingPage == true) {
                return;
            }
            if (evt.getEventType() == HyperlinkEvent.EventType.ACTIVATED) {
                JEditorPane sp = (JEditorPane) evt.getSource();
                if (evt instanceof HTMLFrameHyperlinkEvent) {
                    HTMLDocument doc = (HTMLDocument) sp.getDocument();
                    doc.processHTMLFrameHyperlinkEvent((HTMLFrameHyperlinkEvent) evt);
                } else {
                    loadNewPage(evt.getURL());
                }
            } else if (evt.getEventType() == HyperlinkEvent.EventType.ENTERED) {
                pane.setCursor(handCursor);
            } else if (evt.getEventType() == HyperlinkEvent.EventType.EXITED) {
                pane.setCursor(defaultCursor);
            }
        }
    });
}

From source file:EditorPaneExample20.java

public EditorPaneExample20() {
    super("JEditorPane Example 20");

    pane = new JEditorPane();
    pane.setEditable(true); // Editable
    getContentPane().add(new JScrollPane(pane), "Center");

    // Add a menu bar
    menuBar = new JMenuBar();
    setJMenuBar(menuBar);//  w  w  w  .  j ava2 s . co  m

    // Populate it
    createMenuBar();

    // Build the panel of controls
    JPanel panel = new JPanel();

    panel.setLayout(new GridBagLayout());
    GridBagConstraints c = new GridBagConstraints();
    c.gridwidth = 1;
    c.gridheight = 1;
    c.anchor = GridBagConstraints.EAST;
    c.fill = GridBagConstraints.NONE;
    c.weightx = 0.0;
    c.weighty = 0.0;

    JLabel urlLabel = new JLabel("URL: ", JLabel.RIGHT);
    panel.add(urlLabel, c);
    JLabel loadingLabel = new JLabel("State: ", JLabel.RIGHT);
    c.gridy = 1;
    panel.add(loadingLabel, c);
    JLabel typeLabel = new JLabel("Type: ", JLabel.RIGHT);
    c.gridy = 2;
    panel.add(typeLabel, c);
    c.gridy = 3;
    panel.add(new JLabel(LOAD_TIME), c);

    c.gridy = 4;
    c.gridwidth = 2;
    c.weightx = 1.0;
    c.anchor = GridBagConstraints.WEST;
    onlineLoad = new JCheckBox("Online Load");
    panel.add(onlineLoad, c);
    onlineLoad.setSelected(true);
    onlineLoad.setForeground(typeLabel.getForeground());

    c.gridy = 5;
    c.gridwidth = 2;
    c.weightx = 1.0;
    c.anchor = GridBagConstraints.WEST;
    editableBox = new JCheckBox("Editable JEditorPane");
    panel.add(editableBox, c);
    editableBox.setSelected(true);
    editableBox.setForeground(typeLabel.getForeground());

    c.gridy = 6;
    c.weightx = 0.0;
    JButton saveButton = new JButton("Save");
    panel.add(saveButton, c);
    saveButton.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent evt) {
            EditorKit kit = pane.getEditorKit();
            try {
                if (kit instanceof RTFEditorKit) {
                    kit.write(System.out, pane.getDocument(), 0, pane.getDocument().getLength());
                    System.out.flush();
                } else {
                    if (writer == null) {
                        writer = new OutputStreamWriter(System.out);
                        pane.write(writer);
                        writer.flush();
                    }
                    kit.write(writer, pane.getDocument(), 0, pane.getDocument().getLength());
                    writer.flush();
                }
            } catch (Exception e) {
                System.out.println("Write failed");
            }
        }
    });

    c.gridx = 1;
    insertButton = new JButton("Insert HTML");
    panel.add(insertButton, c);
    insertButton.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent evt) {
            if (insertFrame == null) {
                insertFrame = new HTMLInsertFrame("HTML Insertion", pane);
                Point pt = EditorPaneExample20.this.getLocationOnScreen();
                Dimension d = EditorPaneExample20.this.getSize();
                insertFrame.setLocation(pt.x + d.width, pt.y);
                insertFrame.addWindowListener(new WindowAdapter() {
                    public void windowClosing(WindowEvent evt) {
                        insertFrame.dispose();
                        insertFrame = null;
                        setInsertButtonState();
                    }
                });
                insertButton.setEnabled(false);
                insertFrame.setVisible(true);
            }
        }
    });
    insertButton.setEnabled(false);

    c.gridx = 1;
    c.gridy = 0;
    c.weightx = 1.0;
    c.anchor = GridBagConstraints.EAST;
    c.fill = GridBagConstraints.HORIZONTAL;

    urlCombo = new JComboBox();
    panel.add(urlCombo, c);
    urlCombo.setEditable(true);
    loadingState = new JLabel(spaces, JLabel.LEFT);
    loadingState.setForeground(Color.black);
    c.gridy = 1;
    panel.add(loadingState, c);
    loadedType = new JLabel(spaces, JLabel.LEFT);
    loadedType.setForeground(Color.black);
    c.gridy = 2;
    panel.add(loadedType, c);
    timeLabel = new JLabel("");
    c.gridy = 3;
    panel.add(timeLabel, c);

    getContentPane().add(panel, "South");

    // Register a custom EditorKit for HTML
    ClassLoader loader = getClass().getClassLoader();
    if (loader != null) {
        // Java 2
        JEditorPane.registerEditorKitForContentType("text/html", "AdvancedSwing.Chapter4.EnhancedHTMLEditorKit",
                loader);
    } else {
        // JDK 1.1
        JEditorPane.registerEditorKitForContentType("text/html",
                "AdvancedSwing.Chapter4.EnhancedHTMLEditorKit");
    }

    // Allocate the empty tree model
    DefaultMutableTreeNode emptyRootNode = new DefaultMutableTreeNode("Empty");
    emptyModel = new DefaultTreeModel(emptyRootNode);

    // Create and place the heading tree
    tree = new JTree(emptyModel);
    tree.setPreferredSize(new Dimension(200, 200));
    getContentPane().add(new JScrollPane(tree), "East");

    // Change page based on combo selection
    urlCombo.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent evt) {
            if (populatingCombo == true) {
                return;
            }
            Object selection = urlCombo.getSelectedItem();
            loadNewPage(selection);
        }
    });

    // Change editability based on the checkbox
    editableBox.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent evt) {
            pane.setEditable(editableBox.isSelected());
            pane.revalidate();
            pane.repaint();
        }
    });

    // Listen for page load to complete
    pane.addPropertyChangeListener(new PropertyChangeListener() {
        public void propertyChange(PropertyChangeEvent evt) {
            if (evt.getPropertyName().equals("page")) {
                loadComplete();
                displayLoadTime();
                populateCombo(findLinks(pane.getDocument(), null));
                TreeNode node = buildHeadingTree(pane.getDocument());
                tree.setModel(new DefaultTreeModel(node));

                createMenuBar();
                enableMenuBar(true);
                getRootPane().revalidate();

                enableInput();
                loadingPage = false;
            }
        }
    });

    // Listener for tree selection
    tree.addTreeSelectionListener(new TreeSelectionListener() {
        public void valueChanged(TreeSelectionEvent evt) {
            TreePath path = evt.getNewLeadSelectionPath();
            if (path != null) {
                DefaultMutableTreeNode node = (DefaultMutableTreeNode) path.getLastPathComponent();
                Object userObject = node.getUserObject();
                if (userObject instanceof Heading) {
                    Heading heading = (Heading) userObject;
                    try {
                        Rectangle textRect = pane.modelToView(heading.getOffset());
                        textRect.y += 3 * textRect.height;
                        pane.scrollRectToVisible(textRect);
                    } catch (BadLocationException e) {
                    }
                }
            }
        }
    });

    // Listener for hypertext events
    pane.addHyperlinkListener(new HyperlinkListener() {
        public void hyperlinkUpdate(HyperlinkEvent evt) {
            // Ignore hyperlink events if the frame is busy
            if (loadingPage == true) {
                return;
            }
            if (evt.getEventType() == HyperlinkEvent.EventType.ACTIVATED) {
                JEditorPane sp = (JEditorPane) evt.getSource();
                if (evt instanceof HTMLFrameHyperlinkEvent) {
                    HTMLDocument doc = (HTMLDocument) sp.getDocument();
                    doc.processHTMLFrameHyperlinkEvent((HTMLFrameHyperlinkEvent) evt);
                } else {
                    loadNewPage(evt.getURL());
                }
            } else if (evt.getEventType() == HyperlinkEvent.EventType.ENTERED) {
                pane.setCursor(handCursor);
            } else if (evt.getEventType() == HyperlinkEvent.EventType.EXITED) {
                pane.setCursor(defaultCursor);
            }
        }
    });
}