Using jtextpane

hi,
im trying to use the JTextPane in such a way that i take input in the the JTextField and on hitting enter i send it to JTextPane. here im using the SETTEXT(STRING S) method to send the text to the JTextPane. the problem is this that all the code works well but the message is not shown on the text pane..................please give urgent response.

Try the following
// Do them during initialization
JTextPane txtOutput = new JTextPane();
StyledDocument document = txtOutput.getStyledDocument();
// Define style for output
Style normalStyle = document.addStyle("Normal", null);
StyleConstants.setItalic(normalStyle, false);
StyleConstants.setFontFamily(normalStyle, "Courier");
StyleConstants.setFontSize(normalStyle, 11);
StyleConstants.setForeground(normalStyle, Color.black);
// Now to insert string at end
document.insertString(document.getLength(), "Hello World!!!", normalStyle );Hope it helps
Amitabh

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Using jtextpane as jlist cell renderer component

hi,
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class MyCellRenderer extends JTextPane implements CellRenderer {
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Syntax highlighting using JTextPane

Hello,
Does somebody know how to achieve quick, efficient syntax highlighting using JTextPane. I have tried it out by actually removing and reinserting the colored text, but it is way too slow. It is worse if I do it in a thread. It will be a great help if somebody bails me out of this problem.
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Let me see if I understand your problem...you are attempting to open a fairly large file and then highlight certain portions of the text. You're asking for help on how to efficiently do this and several people gave you links on how to highlight text which leads to your last question about the files taking too long to load. How big are these files you're talking about and how long does it take for them to load? What time is acceptable? Remember, all commercially available document display programs have a certain load time which grows larger as the document it is attempting to display grows in size.
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Problem using JTextPane with large styled docs

I have an environment where we need to parse out large (5MB) log files, and I'm displaying them with colorized attributes such as logging level, timestamp, etc. The files are read in once and never changed, only displayed - the text is not editable, so we don't care about future updates to the doc (only highlighting text for find/copy). However we do need the entire document 'available' after load in order to do string searches and certain operations linked to the entry a piece of text is in.
Parsing and building the styled document are relatively fast operations (a couple seconds), but when I set the document on the JTextPanel (which is inside a JScrollBar), it can take an enormous amount of time to display, and sometimes eats up every resource on the machine, eventually stoping dead without displaying at all (out of memory maybe?).
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lex

In the past I tried to optimize ParagraphView and SectionView of the kit. Don't know whether it will help in your case. Hope so.
import javax.swing.text.*;
import java.awt.Rectangle;
import javax.swing.SizeRequirements;
import java.awt.Shape;
public class OptimizedParagraphView extends ParagraphView {
 public OptimizedParagraphView(Element elem) {
 super(elem);
 protected void layoutMajorAxis(int targetSpan, int axis, int[] offsets, int[] spans) {
 //optimized
 int preferred = 0;
 int n = getViewCount();
 for (int i = 0; i < n; i++) {
 View v = getView(i);
 spans[i] = (int) v.getPreferredSpan(axis);
 offsets=preferred;
preferred += spans[i];
protected void layoutMinorAxis(int targetSpan, int axis, int[] offsets, int[] spans) {
//optimized
int n = getViewCount();
for (int i = 0; i < n; i++) {
View v = getView(i);
int min = (int) v.getMinimumSpan(axis);
offsets[i] = 0;
spans[i] = Math.max(min, targetSpan);
public int getResizeWeight(int axis) {
//optimized
return 0;
public float getAlignment(int axis) {
//opimized
return 0;
protected View createRow() {
//optimized
return new OptimizedRow(getElement());
class OptimizedRow extends BoxView {
SizeRequirements mimorRequirements;
OptimizedRow(Element elem) {
super(elem, View.X_AXIS);
protected void loadChildren(ViewFactory f) {
public AttributeSet getAttributes() {
View p = getParent();
return (p != null) ? p.getAttributes() : getElement().getAttributes();
public float getAlignment(int axis) {
if (axis == View.X_AXIS) {
switch (StyleConstants.getAlignment(getAttributes())) {
case StyleConstants.ALIGN_LEFT:
return 0;
case StyleConstants.ALIGN_RIGHT:
return 1;
case StyleConstants.ALIGN_CENTER:
case StyleConstants.ALIGN_JUSTIFIED:
return 0.5f;
return 0;
public Shape modelToView(int pos, Shape a, Position.Bias b) throws BadLocationException {
Rectangle r = a.getBounds();
View v = getViewAtPosition(pos, r);
if ((v != null) && (!v.getElement().isLeaf())) {
// Don't adjust the height if the view represents a branch.
return super.modelToView(pos, a, b);
r = a.getBounds();
int height = r.height;
int y = r.y;
Shape loc = super.modelToView(pos, a, b);
r = loc.getBounds();
r.height = height;
r.y = y;
return r;
public int getStartOffset() {
int offs = Integer.MAX_VALUE;
int n = getViewCount();
for (int i = 0; i < n; i++) {
View v = getView(i);
offs = Math.min(offs, v.getStartOffset());
return offs;
public int getEndOffset() {
int offs = 0;
int n = getViewCount();
for (int i = 0; i < n; i++) {
View v = getView(i);
offs = Math.max(offs, v.getEndOffset());
return offs;
protected void layoutMinorAxis(int targetSpan, int axis, int[] offsets, int[] spans) {
baselineLayout(targetSpan, axis, offsets, spans);
protected SizeRequirements calculateMinorAxisRequirements(int axis,
SizeRequirements r) {
mimorRequirements= baselineRequirements(axis, r);
return mimorRequirements;
protected SizeRequirements baselineRequirements(int axis, SizeRequirements r) {
if (r == null) {
r = new SizeRequirements();
int n = getViewCount();
// loop through all children calculating the max of all their ascents and
// descents at minimum, preferred, and maximum sizes
int span=0;
for (int i = 0; i < n; i++) {
View v = getView(i);
// find the maximum of the preferred ascents and descents
span = Math.max((int)v.getPreferredSpan(axis),span);
r.preferred = span;
r.maximum=span;
r.minimum=span;
return r;
protected int getViewIndexAtPosition(int pos) {
// This is expensive, but are views are not necessarily layed
// out in model order.
if(pos < getStartOffset() || pos >= getEndOffset())
return -1;
for(int counter = getViewCount() - 1; counter >= 0; counter--) {
View v = getView(counter);
if(pos >= v.getStartOffset() &&
pos < v.getEndOffset()) {
return counter;
return -1;
protected short getLeftInset() {
View parentView;
int adjustment = 0;
if ((parentView = getParent()) != null) { //use firstLineIdent for the first row
if (this == parentView.getView(0)) {
adjustment = firstLineIndent;
return (short)(super.getLeftInset() + adjustment);
protected short getBottomInset() {
float lineSpacing=StyleConstants.getLineSpacing(getAttributes());
return (short)(super.getBottomInset() + mimorRequirements.preferred * lineSpacing);
protected void layoutMajorAxis(int targetSpan, int axis, int[] offsets, int[] spans) {
//optimized
int preferred = 0;
int n = getViewCount();
for (int i = 0; i < n; i++) {
View v = getView(i);
spans[i] = (int) v.getPreferredSpan(axis);
offsets[i]=preferred;
preferred += spans[i];
public int getResizeWeight(int axis) {
//optimized
return 0;
import javax.swing.text.*;
public class OptimizedSectionView extends BoxView {
public OptimizedSectionView(Element elem) {
super(elem,View.Y_AXIS);
protected void layoutMajorAxis(int targetSpan, int axis, int[] offsets, int[] spans) {
//optimized
int preferred = 0;
int n = getViewCount();
for (int i = 0; i < n; i++) {
View v = getView(i);
spans[i] = (int) v.getPreferredSpan(axis);
offsets[i]=preferred;
preferred += spans[i];
public int getResizeWeight(int axis) {
//optimized
return 0;
public float getAlignment(int axis) {
//opimized
return 0;
class MyViewFactory implements ViewFactory {
* Creates view for specified element.
* @param elem Element parent element
* @return View created view instance.
public View create(Element elem) {
String kind = elem.getName();
if (kind != null) {
if (kind.equals(AbstractDocument.ContentElementName)) {
return new LabelView(elem);
else if (kind.equals(AbstractDocument.ParagraphElementName)) {
return new OptimizedParagraphView(elem);
// return new ParagraphView(elem);
else if (kind.equals(AbstractDocument.SectionElementName)) {
return new OptimizedSectionView(elem);
// return new BoxView(elem, View.Y_AXIS);
else if (kind.equals(StyleConstants.ComponentElementName)) {
return new ComponentView(elem);
else if (kind.equals(StyleConstants.IconElementName)) {
return new IconView(elem);
// default to text display
return new LabelView(elem);
regards,
Stas

How to embed image in html when using JTextPane, HTMLEditorKit, JavaMail

I am developing a specialized e-mail client that has to be able to send e-mail messages (in html format with images and attachments) that can be read by standard e-mail clients, and receive similar messages from standard e-mail clients.
I have everything working except for embedding images.
Images are to appear in the document mixed in with the text, but that's not what I mean by "embed". By "embed" I mean that the image itself is encoded within the html.
Here's a bit of code to set the context.
JTextPane bodyPane = new JTextPane();
bodyPane.setEditorKit(htmlEditorKit);
bodyPane.setTransferHandler(new DropHandler());
bodyPane.setDocument(new HTMLDocument());
In the DropHandler I have the following:
HTMLDocument htmlDoc = (HTMLDocument) bodyPane.getDocument();
HTMLEditorKit htmlKit = (HTMLEditorKit) bodyPane.getEditorKit();
int caretPos = bodyPane.getCaretPosition();
At this point get "filename", the full path to an image file that has been dropped onto bodyPane.
String htmlString = "<img src=\"file:///" + filename.replace("\\","/") + "\">";
htmlKit.insertHTML(htmlDoc, caretPos, htmlString, 0, 0, HTML.Tag.IMG);
This works just fine. The image is displayed in the document at the point of insertion.
However, the image itself is an external file. I need to send an e-mail with this image and could send the image file as an attachment, but I obviously can't assume that the recipient of the email is going to save the attachment into the proper location.
What is the best way to do this?
There is a technique for embedding the actual image in the html, using this syntax:
String htmlString = "<a href=\"data:image/png;base64,---mimed png image here--\" alt=\"Red dot\"></a>";
I can't get this to work in JTextPane, so perhaps it's not supported. Also, there may be limitations on the size of an image. And apparently Internet Explorer doesn't support this.
From what I read, using a "content identifier", that is, "cid:" and adding the image as another part of the e-mail message is probably the thing to do. I haven't taken the time to explore this yet.
Does JTextPane support cid? Is that a nonsense question? I suspect what I need to do when the message is being composed is use absolute paths to local files with the images, and then when assembling the e-mail, attach the files and rewrite the html to build in the cid linkage. Similarly, when reading a message with cid's, the thing to do is save the body parts as files and rewrite the cid to point to the actual file.
I have seen others ask similar questions, one as recently as last December, and the reply was to refer to a Sun tutorial. But that tutorial doesn't address the full problem of 1) inserting an image into a document (instead of attaching an image to a component) and 2) sending it as an e-mail message.
I have yet to see an example that shows the complete package.
Am I right that the data option I mentioned is not going to work?
Am I right that cid is the best approach, and do I understand how to use it?
Is there something else?
Thanks
John

Hi Rocky,
Are you using the DC?
if yes then you need to put the image inside the component folder. after that close the application
& reopen. You will get the image.
In case this does not work then try refreshing the portal through server side. Once the cache is cleared, it will be up to view.
Also check the Activity list you have created. It should be added to the dtr properly or else it wont be reflected once reimported the configurations.
Regards
Chander Kararia

Printing RTF-Text using JTextPane

G'day
Does someone know how to print the drawed content of a JTextPane/JEditorPane?
I derived a class from JTextPane and implemented Printable:
public void print(Graphics g)
paintComponent(g);
public void paintComponent(Graphics g)
super.paintComponent(g);
}Seems a little ugly, uhm?! It does not work :(
I get the following errors:
java.lang.NullPointerException
     at java.util.Hashtable.get(Hashtable.java:336)
     at java.awt.Component.getFontMetrics(Component.java:2503)
     at javax.swing.JComponent.getFontMetrics(JComponent.java:1589)
     at com.sun.java.swing.SwingUtilities2.getFRC(SwingUtilities2.java:368)
     at com.sun.java.swing.SwingUtilities2.drawChars(SwingUtilities2.java:576)
     at javax.swing.text.Utilities.drawTabbedText(Utilities.java:159)
     at javax.swing.text.GlyphPainter1.paint(GlyphPainter1.java:102)
     at javax.swing.text.GlyphView.paintTextUsingColor(GlyphView.java:472)
     at javax.swing.text.GlyphView.paint(GlyphView.java:463)
     at javax.swing.text.BoxView.paintChild(BoxView.java:144)
     at javax.swing.text.BoxView.paint(BoxView.java:407)
     at javax.swing.text.BoxView.paintChild(BoxView.java:144)
     at javax.swing.text.BoxView.paint(BoxView.java:407)
     at javax.swing.text.ParagraphView.paint(ParagraphView.java:584)
     at javax.swing.text.BoxView.paintChild(BoxView.java:144)
     at javax.swing.text.BoxView.paint(BoxView.java:407)
     at javax.swing.plaf.basic.BasicTextUI$RootView.paint(BasicTextUI.java:1338)
     at javax.swing.plaf.basic.BasicTextUI.paintSafely(BasicTextUI.java:643)
     at javax.swing.plaf.basic.BasicTextUI.paint(BasicTextUI.java:781)
     at javax.swing.plaf.basic.BasicTextUI.update(BasicTextUI.java:760)
     at javax.swing.JComponent.paintComponent(JComponent.java:743)
     at fd.gui.Component.paintComponent(Component.java:149)Does that make any sense?
Btw: I used Sun JRE 1.5 (Ubuntu)
Cahadras
Edited by: Cahadras on Oct 23, 2007 1:50 PM

Cahadras wrote:
....It must be an internal bug of the Sun VM that causes this NullPointerException when the JTextPane class passes Font instances to JComponent.getFontMetrics().You may be right, but I'm going to say "careful there partner" to your statement claiming that the Sun VM must have a bug. Please see this excellent web site titled "How to Ask Questions the Smart Way" and is found here:
http://www.catb.org/~esr/faqs/smart-questions.html
Here's a subsection of that page titled:
Don't Claim that you've found a bug:
When you are having problems with a piece of software, don't claim you have found a bug unless you are very, very sure of your ground. Hint: unless you can provide a source-code patch that fixes the problem, or a regression test against a previous version that demonstrates incorrect behavior, you are probably not sure enough. This applies to webpages and documentation, too; if you have found a documentation �bug�, you should supply replacement text and which pages it should go on.
Remember, there are many other users that are not experiencing your problem. Otherwise you would have learned about it while reading the documentation and searching the Web (you did do that before complaining, didn't you?). This means that very probably it is you who are doing something wrong, not the software.
The people who wrote the software work very hard to make it work as well as possible. If you claim you have found a bug, you'll be impugning their competence, which may offend some of them even if you are correct. It's especially undiplomatic to yell �bug� in the Subject line.
When asking your question, it is best to write as though you assume you are doing something wrong, even if you are privately pretty sure you have found an actual bug. If there really is a bug, you will hear about it in the answer. Play it so the maintainers will want to apologize to you if the bug is real, rather than so that you will owe them an apology if you have messed up.

Using JTextPane as JTextField

Hi all!
I need to use a JTextPane as if it was a JTextField: at first I used JTextField and everything worked fine but then I had to color the text the user types and only JTextPane allows me to do that.
BUT I would like to use this JTextPane exactly like I use JTextField and this means that when the user types in the JTextPane I would like to "scroll" the text automatically as it happens in JTextField, with no wrapping.
I searched the forum and I found only temporary hacks...nothing really elegant...
Does anybody knows THE solution to this topic?
Thank you in advance
Gio :-)

Hi!
I apologize...sometimes I'm an idiot!!!
you were right...I solved my problem with this:
            JTextPane t = new JTextPane() {
                    public boolean getScrollableTracksViewportWidth() {
                         return false;
                    public boolean getScrollableTracksViewportHeight() {
                         return false;
            };and then I put the JTextPane into a JScrollPane without scrollbars.
This way I can use a JTextPane as JTextField (well, 95%...) but it works for my purpose!
Gio :-)

Multi-document Application using JTextPane - Issue

Hi.
I'm making a java IDE as a class assignment where the user opens a certain project and all associated files open (i.e. all files in the requested folder). Opening is not an issue but here's the real problem. When a file opens (in the JTextPane), the user should be able to edit it. Although my program enables this, what also happens is that if the user switches onto viewing another file (i.e. clicking a file name from a tree in the file pane) the previously open file obviously closes and nothing is saved. I don't want to save the users edits in the actual file until and unless the user themselves click save, but 'd like the application to store the intermediate state of documents until a save request or until the program is terminated. Is there any easy way of doing this?
Thanks.

{color:#000080}Cross posting.{color}
http://forum.java.sun.com/thread.jspa?threadID=5217794&tstart=0
{color:#000080}Cross posting is rude.
db{color}

Problem about using JTextPane in JScrollPane

I put a JTextPane in a JScrollPane.
But when I reduce the window size of the JScrollPane with my mouse, the text line in the JTextPane is broken to newlines automatically due to the reduced window size.
How to prevent the text lines breaking in this situation!

OK, so the words are wrapping when they're not suppose to. How are you adding your JTextPane to the JScrollpane? Also, does setting a preferred size or a minimum size on the JTextPane help?
That's an odd problem. In looking at the API I see that JTextArea and JTextPane are both derived (eventually) from JTextComponent. But the line wrap option is only in JTextArea. This makes me think that it would be possible to overload paint method of the JTextPane. But wow! That would be messy.
I'll keep thinking about it. Let us know if you find a solution.

Bit of a pickle (to use JTextArea or JTextPane)

Basically what i'm trying to do is print out array of numbers into a JTextArea or JTexPane. Initially i started printing into a JTextArea. This work fine, it printed without problems. However, i needed to center this prints and i couldn't do that in an JTextArea. So i started to use JTextPane, the center worked, but i could only print one number, it kept overriding the previous one. How would i print into a JTextPane?
Any help is appreciated :)
JTextPane text = new JTextPane();
SimpleAttributeSet set = new SimpleAttributeSet();
StyledDocument doc = text.getStyledDocument();
StyleConstants.setAlignment(set,StyleConstants.ALIGN_CENTER);
text.setParagraphAttributes(set,true);
JTextArea printArea = new JTextArea(10, 10);
for (int i = 0; i < arr.length; i++) {
 printArea.append(arr[i] + ", "); //Works fine, but no center
 text.setText(arr[i] + " "); //Doesn't print properly...
printArea.append("\n");
text.setText("\n");

For the JTextPane, you were calling setText(), which overrides the current text and replaces it entirely with new text. You should instead append directly to the end of its document (Check the source for JTextArea#append(); that's what it's doing as well). You also need to be adding a newline character between printed numbers:
import java.awt.*;
import javax.swing.*;
import javax.swing.text.*;
public class JTextPaneCentering extends JFrame {
 private static final int[] arr = { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 };
 public JTextPaneCentering() {
 JPanel cp = new JPanel(new BorderLayout());
 cp.setBorder(BorderFactory.createEmptyBorder(5,5,5,5));
 JTextPane text = new JTextPane();
 SimpleAttributeSet set = new SimpleAttributeSet();
 StyleConstants.setAlignment(set, StyleConstants.ALIGN_CENTER);
 text.setParagraphAttributes(set,true);
 for (int i = 0; i < arr.length; i++) {
 append(text, arr[i] + "\n");
 cp.add(new JScrollPane(text));
 setContentPane(cp);
 setDefaultCloseOperation(EXIT_ON_CLOSE);
 setTitle("JTextPane Text Centering");
 pack();
 public void append(JTextPane textPane, String str) {
 Document doc = textPane.getDocument();
 if (doc != null) {
 try {
 doc.insertString(doc.getLength(), str, null);
 } catch (BadLocationException e) {
 // Never happens.
 public static void main(String[] args) {
 SwingUtilities.invokeLater(new Runnable() {
 public void run() {
 new JTextPaneCentering().setVisible(true);
}

ComponentView does not redraw component in JTextPane Cell Rend

We have created a JTable implementation that uses JTextPanes as cell renderers/editors so that text styles and the like are available. We want insert a component, such as a JButton, into the JTextPane. However, the component is only visible when the cell is in an editable state. In the renderer, the ComponentView looks like it has set aside the space where the component is to be, but the component is not visible.
I have looked at this problem for several days now, and have only determined that this seems to be occuring at a low level. What I have found is that the ButtonUI's update method is not called when the document is in the cell renderer, while it seems called continuously in the cell editor (on each caret blink).
Does anybody have any insight as to the problem? I have submitted this as a bug to Sun but wanted to find out if anybody else has come across anything similar to this.
Thank for any help.
Steve Feveile
Here is sample code to reproduce the problem:
// Main Class
* Main frame for the testing of the component not painting. This simplifies
* an issue we have come across when trying to set up using a JTextPane as a
* renderer/editor as the cells in a table.
* Under these conditions we have found that a component inserted into the JTextPanes document
* only appears in the editing state of the cell, whereas the rendering state leaves
* the spacing for the component but does not make it visible.
* Note that creating a JTextPane with the one of these documents will show the component,
* even when not editing.
import java.awt.*;
import java.awt.event.*;
import java.util.*;
import javax.swing.*;
import javax.swing.text.*;
import javax.swing.table.*;
public class tableFrame extends JFrame
 public tableFrame()
 //set up frame
 getContentPane().setLayout(new BorderLayout());
 setSize(500,300);
 setTitle("Table Missing Component Test");
addWindowListener(
 new WindowAdapter() {
 public void windowClosing(WindowEvent e) {
 setVisible(false);
 System.exit(0);
 //set up components the table
 JTable table = new JTable(createDocumentTableModel(2,2));
 table.setRowHeight(60);
 //set the default renderer/editor to use the JTextPane implementation
 for (int x = 0; x < table.getColumnCount(); x++) {
 table.setDefaultEditor(table.getColumnClass(x), new TextPaneCellEditor());
 table.setDefaultRenderer(table.getColumnClass(x), new TextPaneRenderer());
 JScrollPane pane = new JScrollPane(table);
 getContentPane().add(pane, BorderLayout.CENTER);
 //this adds a textpane without the table involved
 //uising the same way of inserting a document
 JTextPane tPane = new JTextPane();
 DefaultStyledDocument doc = new DefaultStyledDocument();
 try
 doc.insertString(0, "Some text in a JTextPane", null);
 JButton b = new JButton("Button");
 SimpleAttributeSet inputAttributes = new SimpleAttributeSet();
 StyleConstants.setComponent(inputAttributes, b);
 doc.insertString(0 , " ", inputAttributes);
 catch (Throwable t)
 System.out.println("createDocumentTableModel error: " + t.getMessage());
 tPane.setDocument(doc);
 tPane.setSize(490, 60);
 JScrollPane pane2 = new JScrollPane(tPane);
 getContentPane().add(pane2, BorderLayout.SOUTH);
 * this creates a table model where the documents are the value
 * in each cell, and the cell renderer/editor can use this instead
 * of a string value
 private TableModel createDocumentTableModel(int row, int col)
 Vector headerData = new Vector();
 Vector tableData = new Vector();
 for (int i=0;i<row;i++)
 headerData.add("Column" + i);
 Vector rowData = new Vector();
 for (int j=0;j<col;j++)
 DefaultStyledDocument doc = new DefaultStyledDocument();
 try
 //this inserts some string to see that this is visible
 //when editing and rendering
 doc.insertString(0, ("Row: " + i + ", Column: " + j), null);
 //this button will only be visible when the cell is in
 //an editing state
 JButton b = new JButton("Button" + i + "-" + j);
 SimpleAttributeSet inputAttributes = new SimpleAttributeSet();
 StyleConstants.setComponent(inputAttributes, b);
 doc.insertString(0 , " ", inputAttributes);
 catch (Throwable t)
 System.out.println("createDocumentTableModel error: " + t.getMessage());
 rowData.add(doc);
 tableData.add(rowData);
 return new DefaultTableModel(tableData, headerData);
 //starts the ball rolling
 static public void main(String args[])
 (new tableFrame()).setVisible(true);
// Custom Cell Editor
* Sets the editor to use a JTextPane implementation
import java.awt.*;
import java.awt.event.*;
import javax.swing.table.*;
import javax.swing.event.*;
import java.util.EventObject;
import java.io.Serializable;
import javax.swing.*;
import javax.swing.text.*;
public class TextPaneCellEditor implements TableCellEditor
/** Event listeners */
protected EventListenerList listenerList = new EventListenerList();
transient protected ChangeEvent changeEvent = null;
protected JTextPane editorComponent;
protected EditorDelegate delegate;
protected int clickCountToStart = 1;
 * constructor.
public TextPaneCellEditor() {
 editorComponent = new JTextPane();
 //use 1 click count to edit a cell
 clickCountToStart = 1;
 * controls the values of the editor
 delegate = new EditorDelegate() {
 * sets the text value cell.
 * @param value - value to set in the document
 public void setValue(Object value) {
 if (value instanceof Document)
 editorComponent.setDocument((Document) value);
 else
 editorComponent.setText("");
 * gets the text value cell.
 * @return the document in the textpane
 public Object getCellEditorValue() {
 return editorComponent.getDocument();
 // implements the setting the value for the editor
 public Component getTableCellEditorComponent(JTable table, Object value,
 boolean isSelected, int row, int column) {
 if (value != null)
 delegate.setValue(value);
 else
 delegate.setValue("");
 return editorComponent;
// Implementing the CellEditor Interface
 // implements javax.swing.CellEditor
 public Object getCellEditorValue() {
 return delegate.getCellEditorValue();
 // implements javax.swing.CellEditor
 public boolean isCellEditable(EventObject anEvent) {
 if (anEvent instanceof MouseEvent) {
 return ((MouseEvent)anEvent).getClickCount() >= clickCountToStart;
 return true;
// implements javax.swing.CellEditor
 public boolean shouldSelectCell(EventObject anEvent) {
 return delegate.shouldSelectCell(anEvent);
 // implements javax.swing.CellEditor
 public boolean stopCellEditing() {
 fireEditingStopped();
 return true;
 // implements javax.swing.CellEditor
 public void cancelCellEditing() {
 fireEditingCanceled();
// Handle the event listener bookkeeping
 // implements javax.swing.CellEditor
 public void addCellEditorListener(CellEditorListener l) {
 listenerList.add(CellEditorListener.class, l);
 // implements javax.swing.CellEditor
 public void removeCellEditorListener(CellEditorListener l) {
 listenerList.remove(CellEditorListener.class, l);
 * Notify all listeners that have registered interest for
 * notification on this event type. The event instance
 * is lazily created using the parameters passed into
 * the fire method.
 * @see EventListenerList
 protected void fireEditingStopped() {
 // Guaranteed to return a non-null array
 Object[] listeners = listenerList.getListenerList();
 // Process the listeners last to first, notifying
 // those that are interested in this event
 for (int i = listeners.length-2; i>=0; i-=2) {
 if (listeners==CellEditorListener.class) {
 // Lazily create the event:
 if (changeEvent == null)
 changeEvent = new ChangeEvent(this);
 ((CellEditorListener)listeners[i+1]).editingStopped(changeEvent);
 * Notify all listeners that have registered interest for
 * notification on this event type. The event instance
 * is lazily created using the parameters passed into
 * the fire method.
 * @see EventListenerList
 protected void fireEditingCanceled() {
 // Guaranteed to return a non-null array
 Object[] listeners = listenerList.getListenerList();
 // Process the listeners last to first, notifying
 // those that are interested in this event
 for (int i = listeners.length-2; i>=0; i-=2) {
 if (listeners[i]==CellEditorListener.class) {
 // Lazily create the event:
 if (changeEvent == null)
 changeEvent = new ChangeEvent(this);
 ((CellEditorListener)listeners[i+1]).editingCanceled(changeEvent);
// Protected EditorDelegate class
protected class EditorDelegate implements ActionListener, ItemListener, Serializable {
 //made up of unimplemented methods
 protected Object value;
 public Object getCellEditorValue() {
 return null;
 public void setValue(Object x) {}
 public void setDocument(Object x) {}
 public Document getDocument() {
 return null;
 public boolean isCellEditable(EventObject anEvent) {
 return true;
 /** Unfortunately, restrictions on API changes force us to
 * declare this method package private.
 boolean shouldSelectCell(EventObject anEvent) {
 return true;
 public boolean startCellEditing(EventObject anEvent) {
 return true;
 public boolean stopCellEditing() {
 return true;
 public void cancelCellEditing() {
 public void actionPerformed(ActionEvent e) {
 fireEditingStopped();
 public void itemStateChanged(ItemEvent e) {
 fireEditingStopped();
// Custom Cell Renderer
* renders a table cell as a JTextPane.
import java.awt.*;
import javax.swing.*;
import javax.swing.text.*;
import javax.swing.table.*;
public class TextPaneRenderer extends JTextPane implements TableCellRenderer
 * Constructor - just set to noneditable
 public TextPaneRenderer() {
 setEditable(false);
 * implementation of table cell renderer. If the value is a document
 * the, the text panes setDocument is used, otherwise a string value
 * is set
 public Component getTableCellRendererComponent(JTable table, Object value,
 boolean isSelected, boolean hasFocus, int row, int column) {
 if (value != null)
 if (value instanceof Document)
 //set the value to a document
 setDocument((Document) value);
 else
 //convert the value to a string
 setText(value.toString());
 else
 //set text to an empty string
 setText("");
 return this;

Hi, I came across the forum and found your problem is very similar to what I am having now. Your post has been a year old, I just wonder if you come up anything productive to what you had? Could you let us know what you (or Sun) find out if you do have one? Thanks.

How to get exact height of HTML line with SUB tag in JTextPane?

Hi, this is my first post. I`ve been searching forum for an answer for a week, but didn`t find one.
I have HTMLDocument inside JTextPane(exacty inside my class that extends it - MyTextPane). I want to do some custom painting in JTextPane so I need to be able to know exact pixel witdh for each line in the document. Easy except one thing, when I use SUB tag the width of the line cannot be simply calculated using FontMetrics, because I don`t know if the text inside SUB tag has lower font size and I don`t know its Y offset to normal line.
I tried get these information from HTMLDocument using attributes from leafElements representing lines, but there seems to be a problem too.
I pass this text:
"(1) LinejW (2) TextB"
to setText method of MyTextPane, this method is overriden so it changes text Font
public void setText(String s) {
super.setText(s);
setJTextPaneFont(this, new Font("Arial",Font.PLAIN,36), Color.black);
}This is how the Element Structure looks like:
Format is Element +": "+elementText+"|"+fontFamily+" "+fontSize
BranchElement(html) 0,22: \n(1)?LinejW (2)?TextB\n|Monospaced 12
---BranchElement(head) 0,1: \n|Monospaced 12
------BranchElement(p-implied) 0,1: \n|Monospaced 12
---------LeafElement(content) 0,1: \n|Arial 36
---BranchElement(body) 1,22: (1) LinejW (2) TextB\n|Monospaced 12
------BranchElement(p-implied) 1,22: (1) LinejW (2) TextB\n|Monospaced 12
---------LeafElement(content) 1,9: (1) Line|Arial 36
---------LeafElement(content) 9,11: jW|Arial 36 <-----------THIS IS THE LOWER INDEX
---------LeafElement(content) 11,12: |Arial 36 <-----------THIS IS just space character '\u020'
---------LeafElement(content) 12,21: (2) TextB|Arial 36
---------LeafElement(content) 21,22: \n|Arial 36
The height of Arial 36 is according to FontMetrics 43(and it really is), but height of the lowerIndex is just 40 pixels(on the screen), not 43 as I would expect. And I still dont have offset, where does the lower index starts paint itself.
Is there any problem with my setText method, so that it changes font style for LOWER INDEX?
I am using JTextPane as notEditable, with just one font style for entire document.
Any suggestion?

Is there any other way to get these information. I just found that I need that information before I put text it in the document.
For example I am would like to generate lines:
paragraph1 - text1
 text2
paragraph2 - text1
 text2
 text3
paragraph3some note - text1
 text2
normal text line
I know what font line will be and I know its AttributeSet. I am trying to get appropriate number of spaces (or left indent) for text2,text3...lines. Then I will pass that string to setText method of JTextPane.
I am unable to get appropriate width for "paragraph3some note - ", since text in SUB tag uses probably different font size.
I am really sorry to bother again. I will think twice what I need before I posting.
You`ve been very helpful so far Stas.
Thanks.

Word wrapping incorrect inside JTextPane on MAC 0.5/10.4 and Linux OS

Hello java-dev team,
In my application, I am using JTextPane as a text editor to create RTF text. The problem I observed with the JTextPane on MAC OS and Linux OS flavors (I tested on Ubuntu 8.04) is: whenever I am changing any of the text property (font color, font name, font style like bold, italic or underline) and then enter the characters without providing space, the whole word gets wrapped to the next line from the point where exactly the property change starts i.e. the new formatted text is jumped to the next line from the starting point of formatting.
My requirement is, as I am not adding any space character while changing the property, the characters should be entered in the sequence and should come to new line as per normal word-wrap rule.
Can anybody help me out in this regards with some solution as its a very urgent requirement?
Below I am also providing the sample code to check the behavior. There is no dynamic facility to change the property in the below code but I am providing the text with multiple formatting settings through code itself. To reproduce the above issue, just type the characters using keyboard in between characters with changed text properties and you can see the whole word jumping to new line.
import java.awt.Dimension;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTextPane;
import javax.swing.text.MutableAttributeSet;
import javax.swing.text.SimpleAttributeSet;
import javax.swing.text.StyleConstants;
import javax.swing.text.StyledDocument;
import javax.swing.text.StyledEditorKit;
public class TestWrapping {
 JScrollPane scroll;
 JTextPane edit;
 public TestWrapping() throws Exception {
 final JFrame frame=new JFrame();
 frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
 edit=new JTextPane()
 public void setSize(Dimension d)
 if (d.width < getParent().getSize().width)
 d.width = getParent().getSize().width;
 super.setSize(d);
 public boolean getScrollableTracksViewportWidth()
 return false;
 edit.setPreferredSize(new Dimension(150,150));
 edit.setSize(150,150);
 edit.setEditorKit(new StyledEditorKit());
 scroll=new JScrollPane(edit);
 edit.getDocument().insertString(0,"11111111111111222222222222222222222222222222222222222",null);
 MutableAttributeSet attrs=new SimpleAttributeSet();
 StyleConstants.setBold(attrs,true);
 ((StyledDocument)edit.getDocument()).setCharacterAttributes(30,5,attrs,false);
 StyleConstants.setUnderline(attrs,true);
 ((StyledDocument)edit.getDocument()).setCharacterAttributes(35,5,attrs,false);
 StyleConstants.setFontSize(attrs,25);
 ((StyledDocument)edit.getDocument()).setCharacterAttributes(40,5,attrs,false);
 frame.getContentPane().add(scroll);
 frame.setBounds(0,0,150,150);
 frame.show();
 public static void main(String[] args) throws Exception {
 new TestWrapping();
}The same functionality works fine on Windows XP and problem is observed on MAC OS 10.4/10.5, Ubuntu 8.04. I am using jdk1.5 on both the platforms. I tested using jdk 6.0 on Ubuntu 8.04, and the problem is easily reproducible. I placed a query in the respective OS forums also but did not receive any replies. I also searched the suns bug database, but could not find any bug addressing the mentioned problem correctly. I also logged issue at bugs.sun.com and was assigned internal review ID of 1480019 for this problem.
If you need any additional information, please let me know.
Thanks in advance.
Regards,
VPKVL

VPKVL wrote:
Hi All,
Just want to update that when I checked this issue with JDK1.6 on Ubuntu 8.04, I am unable to reproduce the issue. Everything works as expected. But problem continues on MAC 10.5. So can anybody help me out in coming out of this issue on MAC 10.5.
Thanks in advance.The only thing I can suggest is that you open a bug (radar) with apple ( developer.apple.com ), and then wait at least 12 months for Apple to get around to fixing it :s

How can I put line number into JTextPane?

Most editors has ability that shows line numbers begining of each lines.
The line number doesn't effect any content in the editor, however.
I'm using JTextPane for editor, and I want to show line number for each line.
How can I do this?

have a look at
http://forum.java.sun.com/thread.jsp?forum=57&thread=258176
?

Is caret positioning in right-to-left oriented jtextpane corruptable?

Dear all -
Below is a serious problem. I hope I can get help from you experts out there; otherwise, I think it is a bug that should be reported to the JDK developers.
I am writing an editor using my own keyboard layout to type in Arabic. To do so, I use jTextPane, and my own implementation of DocumentFilter (where I map English keys to Arabic letters). I start by i) setting the component orientation of jTextPane to be from RIGHT_TO_LEFT, and ii) attaching a caretListener to trace the caret's position.
The problem (I think it is a bug just like what is recorded here: http://bugs.adobe.com/jira/browse/SDK-16315):
Initially as I type text in Arabic, there is one-to-one correspondence between where I point my mouse and where the caret displays, basically, the same place. However, a problem occurs (and can always be re-produced) when I type a word towards the end of the line, follow it by a space character, and that space character causes the word to descend to the next line as a result of a wrap-around. Now, as I point my mouse to that first line again, the location where I click the mouse and the location where the caret flashes are no longer coincident! Also, the caret progression counter is reversed! That is, if there are 5 characters on Line 1, then whereas initially the caret starts from Position 0 on the right-hand side and increases as more text is added from right to left, it is now reversed where the the caret now increases from left to right for the first line, but correctly increases from right to left in the second line! yes funny stuff and very hard to describe to.
So, here is an example. I wrote the code below (JDK1.6_u10, on Netbeans 6.5 RC2) to make it easy to reproduce the problem. In the example, I have replaced the keys A, S, D, F and G with their Arabic corresponding letters alif, seen, daal, faa and jeem. Now, type these letters inside the double quotes (without the double quotes) including the two spaces please and watch out for the output: "asdfg asdfg ". Up until you type the last g and before you type space, all is perfect, and you should notice that the caret position correctly moves from 0 upwards in the printlines I provided. When you type that last space, the second word descends as a result of the wrap-around, and hell breaks loose! Notice that whereas the mouse and caret position are coincident on the second line, there is no way to fine-control the mouse position on the first line any more. Further, whereas adding text on the second line is intuitive (i.e., you can insert more text wherever you point your mouse, which is also where the caret would show up), for the first line, if you point the mouse any place over the written string, the caret displays in a different place, the any added text is added in the wrong place! All this because the caret counter is now reversed, which should never occur. Any ideas or fixes?
Thank you very much for reading.
Mohsen
package workshop.onframes;
import java.awt.ComponentOrientation;
import java.awt.Rectangle;
import javax.swing.event.CaretEvent;
import javax.swing.event.CaretListener;
import javax.swing.text.BadLocationException;
public class NewJFrame1 extends javax.swing.JFrame {
public NewJFrame1() {
initComponents();
jTextPane1.setComponentOrientation(ComponentOrientation.RIGHT_TO_LEFT);
CaretListener caretListener = new CaretListener() {
public void caretUpdate(CaretEvent e) {
int dot = e.getDot();
int mark = e.getMark();
if (dot == mark) {
try {
Rectangle cc = jTextPane1.modelToView(dot);
System.out.println("Caret text position: " + dot +
", view location (x, y): (" + cc.x + ", " + cc.y + ")");
} catch (BadLocationException ble) {
System.err.println("CTP: " + dot);
} else if (dot < mark) {
System.out.println("Selection from " + dot + " to " + mark);
} else {
System.out.println("Selection from " + mark + " to " + dot);
jTextPane1.addCaretListener(caretListener);
/** This method is called from within the constructor to
* initialize the form.
* WARNING: Do NOT modify this code. The content of this method is
* always regenerated by the Form Editor.
@SuppressWarnings("unchecked")
// <editor-fold defaultstate="collapsed" desc="Generated Code">
private void initComponents() {
jScrollPane3 = new javax.swing.JScrollPane();
jTextPane1 = new javax.swing.JTextPane();
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
jTextPane1.setFont(new java.awt.Font("Tahoma", 0, 24)); // NOI18N
jTextPane1.setAutoscrolls(false);
jTextPane1.addKeyListener(new java.awt.event.KeyAdapter() {
public void keyTyped(java.awt.event.KeyEvent evt) {
jTextPane1KeyTyped(evt);
jScrollPane3.setViewportView(jTextPane1);
javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
getContentPane().setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addContainerGap()
.addComponent(jScrollPane3, javax.swing.GroupLayout.DEFAULT_SIZE, 159, Short.MAX_VALUE)
.addContainerGap())
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addContainerGap()
.addComponent(jScrollPane3, javax.swing.GroupLayout.PREFERRED_SIZE, 85, javax.swing.GroupLayout.PREFERRED_SIZE)
.addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
pack();
}// </editor-fold>
private void jTextPane1KeyTyped(java.awt.event.KeyEvent evt) {
if (evt.getKeyChar() == 'a') {
evt.setKeyChar('\u0627');
} else if (evt.getKeyChar() == 's') {
evt.setKeyChar('\u0633');
} else if (evt.getKeyChar() == 'd') {
evt.setKeyChar('\u062f');
} else if (evt.getKeyChar() == 'f') {
evt.setKeyChar('\u0641');
} else if (evt.getKeyChar() == 'g') {
evt.setKeyChar('\u062c');
public
static void main(String args[]) {
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
new NewJFrame1().setVisible(true);
// Variables declaration - do not modify
private javax.swing.JScrollPane jScrollPane3;
private javax.swing.JTextPane jTextPane1;
// End of variables declaration
}

Hi Mohsen,
I looked at it and indeed, I see what you describe. Sorry, but I can't shed any light. I tried to figure out what software component, or combination of components, is the cause of the problem. I see several candidates:
1) The JTextPane
2) The Document
3) RTL support
4) BIDI support
5) Interpretation (by any other software component) of the left and right arrow key
6) The font
To clarify number 6: I know virtually nothing of Arabic language (apart from it being written from right to left). I remember however that the actual representation of a letter is dependent of its position between other letters: front, middle and end. What I see to my astonishment is that it seems that the rendering is also aware of this phenomenon. When you insert an A between the S and D of ASDFG, the shape of the S changes. Quite magic.
I tried to add a second textpane with the same Document, but a different size, to see what would happen with number one if one types text in number two and vice versa.
In my first attempt, the font that you set on textpane one was gone after I set its document to number two. For me that is very strange. The font was set to the textpane, not to the document. The separation betweem Model and View seems not very clear in this case. So I now also set that font on the second textpane.
I will post the changed code so that you may experiment some more and hopefully will find the problem.
You might be interested in a thread on java dot net forums that discusses a memory leak for RTL [http://forums.java.net/jive/message.jspa?messageID=300344#300344]
Piet
import java.awt.ComponentOrientation;
import java.awt.EventQueue;
import java.awt.Font;
import java.awt.Rectangle;
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;
import javax.swing.GroupLayout;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTextPane;
import javax.swing.WindowConstants;
import javax.swing.event.CaretEvent;
import javax.swing.event.CaretListener;
import javax.swing.text.BadLocationException;
import javax.swing.text.Document;
public class NewJFrame1 extends JFrame {
 private static final long serialVersionUID = 1L;
 public NewJFrame1() {
 initComponents();
 // jTextPane1.setComponentOrientation(ComponentOrientation.RIGHT_TO_LEFT);
 this.applyComponentOrientation(ComponentOrientation.RIGHT_TO_LEFT);
 CaretListener caretListener = new CaretListener() {
 public void caretUpdate(CaretEvent e) {
 int dot = e.getDot();
 int mark = e.getMark();
 if (dot == mark) {
 try {
 Rectangle cc = jTextPane1.modelToView(dot);
 System.out.println("Caret text position: " + dot
 + ", view location (x, y): (" + cc.x + ", "
 + cc.y + ")");
 } catch (BadLocationException ble) {
 System.err.println("CTP: " + dot);
 } else if (dot < mark) {
 System.out.println("Selection from " + dot + " to " + mark);
 } else {
 System.out.println("Selection from " + mark + " to " + dot);
 jTextPane1.addCaretListener(caretListener);
 private KeyAdapter toArabic = new KeyAdapter() {
 public void keyTyped(KeyEvent evt) {
 jTextPane1KeyTyped(evt);
 * This method is called from within the constructor to initialize the form.
 * WARNING: Do NOT modify this code. The content of this method is always
 * regenerated by the Form Editor.
 // @SuppressWarnings("unchecked")
 // <editor-fold defaultstate="collapsed" desc="Generated Code">
 private void initComponents() {
 jScrollPane3 = new JScrollPane();
 jTextPane1 = new JTextPane();
 setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
 jTextPane1.setFont(new Font("Tahoma", 0, 24)); // NOI18N
 jTextPane1.setAutoscrolls(false);
 jTextPane1.addKeyListener(toArabic);
 jScrollPane3.setViewportView(jTextPane1);
 GroupLayout layout = new GroupLayout(getContentPane());
 getContentPane().setLayout(layout);
 layout.setHorizontalGroup(layout.createParallelGroup(
 GroupLayout.Alignment.LEADING).addGroup(
 layout.createSequentialGroup().addContainerGap().addComponent(
 jScrollPane3, GroupLayout.DEFAULT_SIZE, 159,
 Short.MAX_VALUE).addContainerGap()));
 layout.setVerticalGroup(layout.createParallelGroup(
 GroupLayout.Alignment.LEADING).addGroup(
 layout.createSequentialGroup().addContainerGap().addComponent(
 jScrollPane3, GroupLayout.PREFERRED_SIZE, 85,
 GroupLayout.PREFERRED_SIZE).addContainerGap(
 GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)));
 pack();
 }// </editor-fold>
 private void jTextPane1KeyTyped(KeyEvent evt) {
 if (evt.getKeyChar() == 'a') {
 evt.setKeyChar('\u0627');
 } else if (evt.getKeyChar() == 's') {
 evt.setKeyChar('\u0633');
 } else if (evt.getKeyChar() == 'd') {
 evt.setKeyChar('\u062f');
 } else if (evt.getKeyChar() == 'f') {
 evt.setKeyChar('\u0641');
 } else if (evt.getKeyChar() == 'g') {
 evt.setKeyChar('\u062c');
 public static void main(String args[]) {
 EventQueue.invokeLater(new Runnable() {
 public void run() {
 final NewJFrame1 frameOne = new NewJFrame1();
 frameOne.setLocationRelativeTo(null);
 frameOne.setVisible(true);
 EventQueue.invokeLater(new Runnable() {
 public void run() {
 Document doc = frameOne.jTextPane1.getDocument();
 JTextPane textPane2 = new JTextPane();
 textPane2.setFont(new Font("Tahoma", 0, 24)); // NOI18N
 textPane2.setAutoscrolls(false);
 textPane2.setDocument(doc);
 textPane2.addKeyListener(frameOne.toArabic);
 JFrame frameTwo = new JFrame();
 frameTwo.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
 frameTwo.add(new JScrollPane(textPane2));
 frameTwo.setSize(400, 300);
 frameTwo.setLocationByPlatform(true);
 frameTwo.setVisible(true);
 frameTwo
 .applyComponentOrientation(ComponentOrientation.RIGHT_TO_LEFT);
 // Variables declaration - do not modify
 private JScrollPane jScrollPane3;
 private JTextPane jTextPane1;
 // End of variables declaration
}

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