Caret position in HTML JTextPane

Hi all,
This question has been asked before, but with no satisfying answer that I can find so, in the hope that the eyes of a Swing text expert will fall upon this post, I'm having to ask again...
Is there a simple means of translating the current caret position within a JTextPane to the offset within the HTML code it represents?
In other words, where the JTextPane displays:Now is the time...The underlying HTML might be:<html><head></head><body>Now is the time...</body></html>With the cursor positioned just in front of 'is', the caret position would be 4, but in the underlying HTML, the position would be 46.
Any ideas, hints, suggestions or complete answers appreciated!
Chris.

I would suggest a trick.
Suppose you ave actul caret position in JEditorPane.
int caretPos=...;
use HTLEditorKit.write(someWriter,htmlDoc,0,caretPos);
Then you'll have a string
<html><head></head><body>Now </body></html>
Then throw away all the closing tags and you'll have what you need by string length.
Of course you would have to write kind of converter to clear out all formatting chars.
regards,
Stas

Similar Messages

JEditorPane: transforming between caret position in html and text/plain

Hi all,
I've done quite a bit of searching, and found problems similar to this one, but not this exactly, so I'll try asking it here.
I have a JEditorPane with HTMLEditorKit, which I'm using for a WYSIWYG text editor. When the user wants to insert something, say an image, I get the caret position and insert a String into the document's underlying text.
The problem is that if we are the WYSIWYG mode, the caret position isn't the same as the caret position in text/plaain mode.
So if the underlying text is
<html>
<body>
 Some text
</body>
</html>the user will just see "Some text". If they place the caret between "Some" and "text", editorPane.getSelectionStart() will return '5'. But I want to insert my text at position '16' in the plain text.
Is there a simple way to go back and forth between these two positions? Or to have getSelectionStart() to return the index relative to the text/plain mode?
Thanks!
Tim

Very poor that no one answered this one.
Did you still need the answer?
I have 'a' answer. But not a complete one.
In fact I only found this in search for an answer for my problem:
http://forums.sun.com/thread.jspa?threadID=5409216&tstart=0
Did you actually just test out what you knew so far to test what happens?
If you were to use the HTMLEditorKit.insertHTML function, it just wants the visual caret position. So '5' would have been reasonably correct for you.
I was doing something like this:
 HTML.Tag tag = null;
 Pattern p = Pattern.compile("\\s*\\<\\s*(\\w+).*", Pattern.MULTILINE|Pattern.DOTALL);
 Matcher m = p.matcher(text);
 if (m.matches())
 tag = HTML.getTag(m.group(1));
 kit.insertHTML(doc, offset,// +1
 text, 0,// 0
 0,// 0
 tag);
Assuming you were inserting a tag, my code there checks what tag it is, and if that is known by the java implementation, assigns that to 'tag', so that the element is correctly inserted.
If it is not known, we just use 'null'. Which for me wasn't such a great result.
In fact, nothing really was a great result, as with the default java implementation being buggy (so far as I can see) it inserted to the wrong position and caused all sorts of anomalies.
Hope you worked it out. And if you did, and have a better result than what I have, maybe you can let me know what you did!
Sincerely,
sean

Getting caret position in HTML of JEditorPane

Hi
How can I get the equivalent position of the caret in the HTML behind a JEditorPane?
Regards
Peter

Do you mean how to take the int that is returned from
editorPane.getCaretPosition();
and figure out what HTML is at that position?
HTMLEditorKit (javax.swing.text.html) may help. Also check out class HTMLDocument and its method getReader(int pos).
Sorry, I haven't actually done this, so I am just throwing out ideas.
Barb

JTextPane- Getting Caret Position

Hi All - Can somebody please let me know if there is a way to know the co-ordinates of the end of a line which was read at a particular location in a JTextPane. In other words if I have jTextPane with text
"Welcome to the bizarre world of JTextPane."Now if I read some text say "SOMETHING" at the end of the word of, I would like the line to be
Welcome to the bizarre world of SOMETHING of JTextPane with the caret position at the end of SOMETHING. Can somebody shed some light on it. Here's the basic code that I have written down.
the param str would be some html tag String. I can post more code if confusing.
private static void readToEditor(JTextPane textPane, String str) throws Exception
HTMLEditorKit kit = (HTMLEditorKit) textPane.getEditorKitForContentType("text/html");
ByteArrayInputStream stream = new ByteArrayInputStream(str.getBytes());
Reader reader = new BufferedReader(new InputStreamReader(stream))
HTMLDocument doc = (HTMLDocument) textPane.getDocument();
int pos = textPane.getCaretPosition();
kit.read(reader, doc, textPane.getCaretPosition());
reader.close();
// The Swing Bug handled here which puts in a "\n" unnecessarily before reading HTML Tags.
String theBug = doc.getText(pos, 1);
if (theBug.equals("\n"))
doc.remove(pos, 1);
}Thanks so much for looking.

Do you mean how to take the int that is returned from
editorPane.getCaretPosition();
and figure out what HTML is at that position?
HTMLEditorKit (javax.swing.text.html) may help. Also check out class HTMLDocument and its method getReader(int pos).
Sorry, I haven't actually done this, so I am just throwing out ideas.
Barb

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
}

How to get the caret position of component embedded in JTextPane?

Hi great java developers ;-)
I want to get the caret position of component which is embedded in StyledDocument / JTextPane.
How has it to be done?
Thank you very much!!!

The Document doesn't know which textPane it belongs to. (It could even be shared by mulitple textPanes).
You get the caret position of a any text component by using:
textComponent.getCaretPosition();

How to listen and obtain caret positions of changed text in JTextPane?

Hi,
I have a JTextPane that displays text with some styles on particular words in the text. For example, I highlight words with red color if they are in my dictionary file. I use regular expression to find matches, replace them with their corresponded definitions, and call setCharacterAttributes to add styles to the definitions. I store all start and end caret positions of the matched words/definitions in a vector. So, I can redisplay styles of all previous matches.
The problem is that I'd like to be able to edit the text of some previous matches. So, with those changes all caret positions that I already store in the vector need to be updated.
How can I obtain caret positions of changed text in JTextPane?
How can I know that a user is currently changing text in the JTextPane?
How can I get style of text such as color that is being changed?
Thank you very much.

Thank you very much, camickr, for your reply.
I think that I might not know the right way to handle JTextPane and Document object.
What I have done are:
- Add style to JTextPane using, for example,
Style targetCurrentMatchStyle = this.targetWindowTextPane.addStyle("Red", null);
StyleConstants.setForeground(targetCurrentMatchStyle, Color.red);//For highlight - Then, I use regular expression (Pattern and Matcher) to find a match in text. For each match, I get start and end position from matcher.start() and matcher.end().
if(matcher.find(start)){
String term=matcher.group();
int start=matcher.start();
int end = matcher.end();
//find definition for the matched term.
String definition=mydictionaryHash.get(term);
//Store caret positions in lists
startPositionList.add(start);
matchedLength=lengthList.add(definition.length());
//Add changed to text in textpane
StringBuffer sb=new StringBuffer();
matcher.appendReplacement(sb, definition);
matcher.appendTail(sb);
//Get translated text from StringBuffer after replacement
String translatedText=sb.toString();
targetWindoTextPane.setText(translatedText);
//Update start position for next search
start=start+definition.length();
//Add style to matched regions below.
}- From the lists of start positions and matched lengths, I use the following code to add "Red" color to the matched text regions including all previously matched.
for(int i=0;i<startPositionList.size();i++){
this.targetWindowTextPane.getStyledDocument().setCharacterAttributes(
startPositionList.get(i),
lengthList.get(i),
this.targetWindowTextPane.getStyle("Red"),
true);
}My issue is that I'd like to be able edit previously matched regions and update all positions of the matched regions stored in the lists.

Find caret position of search text in jEditorPane

Hi All,
I am looking for a way to find the Caret position in a jeditor pane for the search text that i supply. The Jeditor pain is setup for text/html and when i find the index of my search text "ANCHOR_d" in the jeditor pane is 27000 something but the caret position is 7495 how do you find the caret position of the search text ??
Any help is appriciated.
I am also looking into getting abnchoring to work in the jeditorpane html text but as of yet i have been unsuccessful.
Kind Regards,
Wurns

Search the underlying document, not the editor pane. Play around with this example, which I threw together the other day for a somewhat similar problem with JTextPane involving newlines, and modified for your need.
Note: Please do not program by exception.import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import javax.swing.JButton;
import javax.swing.JEditorPane;
import javax.swing.JFrame;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JTextField;
import javax.swing.SwingUtilities;
import javax.swing.text.Document;
public class SearchEditorPane {
 JFrame frame = new JFrame ("Search JTextPane Test");
 String html = "<HTML><BODY>This is some" +
 " formatted" +
 " colored" +
 " html." +
 "This is a " +
 "comic \n \nsans ms section<div>" +
 "And this is a new division</div>" +
 "</BODY></HTML>";
 JEditorPane editorPane = new JEditorPane ("text/html", html);
 JPanel panel = new JPanel ();
 JTextField textField = new JTextField (10);
 JButton button = new JButton ("Find");
 Document doc = editorPane.getDocument ();
 void makeUI () {
 editorPane.setText ("<HTML><BODY>This is some" +
 " formatted" +
 " colored" +
 " html." +
 "This is a " +
 "comic \n \nsans ms section<div>" +
 "And this is a new division</div>" +
 "</BODY></HTML>");
 button.addActionListener (new ActionListener () {
 public void actionPerformed (ActionEvent e) {
 // Programming by exception is BAD, don't copy this style
 // This is just to illustrate the solution to the problem at hand
 // (Sorry, uncle-alice, haven't reworked it yet)
 try {
 Matcher matcher = Pattern.compile (textField.getText ())
 .matcher (doc.getText (0, doc.getLength ()));
 matcher.find ();
 editorPane.setCaretPosition (matcher.start ());
 editorPane.moveCaretPosition (matcher.end ());
 editorPane.requestFocus ();
 } catch (Exception ex) {
 JOptionPane.showMessageDialog (frame, "Not Found!\n" + ex.toString ());
 //ex.printStackTrace();
 panel.add (textField);
 panel.add (button);
 panel.setPreferredSize (new Dimension (300, 40));
 frame.setDefaultCloseOperation (JFrame.EXIT_ON_CLOSE);
 frame.setSize (300, 300);
 frame.add (editorPane, BorderLayout.CENTER);
 frame.add (panel, BorderLayout.SOUTH);
 frame.setLocationRelativeTo (null);
 frame.setVisible (true);
 public static void main (String[] args) {
 SwingUtilities.invokeLater (new Runnable () {
 public void run () {
 new SearchEditorPane ().makeUI ();
}db

Find attributes of HTMLDocument at caret position

Can anyone tell me how I can find all the attributes of the HTML document I am working on at the current caretposition? I need to be able to tell if the text at the caret positon is bold, part of a list, linked and so on.

Hi,
the answer to your question is twofold. Bold is stored in an HTMLDocument as an attribute. The other items you mention (part of a list, links) are elements by themselves.
To find out, whether or not text at the caret position is bold can be done by (assuming, your document is shown in a JEditorPane)
HTMLDocument doc = (HTMLDocument) editorPane.getDocument();
Object attr = doc.getCharacterElement(editorPane.getSelectionStart()).getAttributes().getAttribute(CSS.Attribute.FONT_WEIGHT);But if the text portion in question is bold because of a setting within an associated style sheet, additional coding would be necessary (getting the style sheet, getting the attributes for the style class, etc.). As well, an attribute could come from a setting within the paragraph instead of the actual text portion referring to (again additional coding).
To find out if text at the caret position is part of a list or a link, you have to inspect the surrounding elements basically by using getCharacterElement and then iterating up in the element tree with getParentElement().
I recommend to read the related API docs in javax.swing.text and javax.swing.text.html
Ulrich

Javascript: set or get caret position in textarea -not in IE?

Hi all
another javascript question...
I'm using a javascript function that gets the caret position
(the cursor position) in the textarea,
and stores it when the textarea gets out of focus, so that
text can be inserted by clicking on a
button, where the caret was previously in the textarea.
I suppose many cms or html editors do that successfully
somehow.
But my function works in all browsers BUT IE.
I remember giving up with the same problem years ago after I
found documentation on how impossible
or unreliable it was to make this work in IE.
But I thought times had changed, and IE7 would improve on
that matter.
Apparently not?
I found many that claim to work in all browsers, but the one
I choose to use obviously does not...
So do you guys know a script that does that and WORKS with
IE?
seb ( [email protected])
http://webtrans1.com | high-end web
design
An Ingenious WebSite Builder:
http://sitelander.com

I'll link you something tonight - I wrote it like five years
ago when I was in grade eleven. It's ugly code (as far as I can
remember), but it has really advanced features and is REALLY easy
to adapt to most situations.

How to update caret position in status bar ?

Hello, I'm trying to display 'Line Number & Position' in my status bar, I'm not sure how to proceed from here.
How would I update this to occur on every keystroke?
SSCCE
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.event.KeyEvent;
import javax.swing.BorderFactory;
import javax.swing.Box;
import javax.swing.JFrame;
import javax.swing.JTabbedPane;
import javax.swing.JTextField;
import javax.swing.JTextPane;
import javax.swing.border.EtchedBorder;
import javax.swing.text.BadLocationException;
import javax.swing.text.Element;
import javax.swing.text.Utilities;
public class test extends JFrame
     private static final long serialVersionUID = 1L;
     private JTextPane pane;
     @SuppressWarnings("unused")
     public static void main(String[] args)
          test t = new test();
     public test()
          super("test");
          this.setDefaultCloseOperation(EXIT_ON_CLOSE);
          this.setLayout(new BorderLayout());
          this.add(textPane(), BorderLayout.CENTER);
          this.add(statusBar(), BorderLayout.SOUTH);
          this.pack();
          this.setVisible(true);
     private JTabbedPane textPane()
          pane = new JTextPane();
          JTabbedPane tab = new JTabbedPane();
          tab.addTab(" Query ", null, pane, "Query");
          tab.setMnemonicAt(0, KeyEvent.VK_1);
          return tab;
     private Box statusBar()
          Box sBar = Box.createHorizontalBox();
          JTextField linePosField = new JTextField(15);
          linePosField.setBackground(Color.LIGHT_GRAY);
          linePosField.setEditable(false);
          linePosField.setBorder(BorderFactory.createEtchedBorder(EtchedBorder.RAISED));
          linePosField.setText(String.format("%s %d %s %d", "Line:",
                    getCaretRowPosition(pane), "Pos:",
                    getCaretColumnPosition(pane)));
          sBar.add(linePosField);
          return sBar;
      * Return the current line number at the Caret position.
     public int getCaretRowPosition(JTextPane textPane)
          int caretPosition = textPane.getCaretPosition();
          Element root = textPane.getDocument().getDefaultRootElement();
          return root.getElementIndex( caretPosition ) + 1;
      * Return the current Caret position.
     public int getCaretColumnPosition(JTextPane textPane)
          int offset = textPane.getCaretPosition();
          int column;
          try {
               column = offset - Utilities.getRowStart(textPane, offset);
          } catch (BadLocationException e) {
               column = -1;
          return column;
}Edited by: G-Unit on Oct 17, 2010 4:08 AM

Sorry, Found CaretListener(): Updated code;
private JTabbedPane textPane()
   pane = new JTextPane();
   pane.addCaretListener(new CaretListener() {
      public void caretUpdate(CaretEvent e)
         linePosField.setText(String.format("%s %d %s %d", "Line:",
            getCaretRowPosition(pane), "Pos:",
            getCaretColumnPosition(pane)));
   JTabbedPane tab = new JTabbedPane();
   tab.addTab(" Query ", null, pane, "Query");
   tab.setMnemonicAt(0, KeyEvent.VK_1);
   return tab;
}Now I just have to figure out how to add a panel for line number to sit adjacent to my text area without throwing the whole window out of proportion. I tried adding some context menu buttons to sit next to it, and for some reason they seemed to want to grow by 500x the size specified and destroyed the whole look of the app. :s maybe I will just make do with status bar line numbers.
Edited by: G-Unit on Oct 17, 2010 4:35 AM

Caret Position always remain unchanged

Hi,
I've tried inserting some strings and components into a JTextPane, but the caret position always remain at 0 irregardless. Is this the expected behavior?
My expected behavior is that the caret is to at the end of the document, after each insertion of strings or components. Therefore i'll need to explicitly set the caret position to EOF after each insertion. Is there another approach to this issue?
=========================================
StyledDocument doc = textPane.getStyledDocument();
System.out.println( "" + textPane.getCaretPosition());
// value of caretposition is 0
textPane.insertComponent( new JButton("temp"));
System.out.println( "" + textPane.getCaretPosition());
// value of caretposition still remain as 0
doc.insertString(doc.getLength(), message, null);
System.out.println( "" + textPane.getCaretPosition());
// value of caretposition still remain as 0
==============================================

Please use code tags like so on this forum:
StyledDocument doc = textPane.getStyledDocument();
System.out.println( "" + textPane.getCaretPosition());
// value of caretposition is 0
textPane.insertComponent( new JButton("temp"));
System.out.println( "" + textPane.getCaretPosition());
// value of caretposition still remain as 0
doc.insertString(doc.getLength(), message, null);
System.out.println( "" + textPane.getCaretPosition());
// value of caretposition still remain as 0{code}

Translation of Mouse Coordinates into Caret Positions

Is there any way to translate the mouse coordinates into corresponding caret positions in JTextPane without the user clicking at a location?

Try somethink like this:
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class MouseToCaretPosition extends JFrame
public MouseToCaretPosition()
     JPanel panel = new JPanel();
     setContentPane( panel );
          final JTextPane textPane = new JTextPane();
          textPane.setText( "one\ntwo\nthree\nfour\nfive\nsix\nseven\neight" );
          JScrollPane scrollPane = new JScrollPane( textPane );
     scrollPane.setPreferredSize( new Dimension( 200, 200 ) );
          panel.add( scrollPane );
          textPane.addMouseMotionListener( new MouseMotionAdapter()
               public void mouseMoved(MouseEvent e)
                    Point point = new Point( e.getX(), e.getY() );
                    System.out.println( textPane.viewToModel( point ) );
public static void main(String[] args)
MouseToCaretPosition frame = new MouseToCaretPosition();
frame.setDefaultCloseOperation( EXIT_ON_CLOSE );
frame.pack();
frame.setVisible(true);

WebView / HTMLEditor - caret position and selected content

Hey :)
Is it possible to get the caret position and the selected content in the HTMLEditor / WebView? How?
Thanks in advance.

Use JavaScript methods. For example:
http://stackoverflow.com/questions/9370197/caret-position-cross-browser
http://stackoverflow.com/questions/6129006/get-the-raw-html-of-selected-content-using-javascript
Use the Java\JavaScript bridge if you want the result in Java:
http://docs.oracle.com/javafx/2/webview/jfxpub-webview.htm

JcomboBox caret position

I want to create a jcombobox that accepts only dates... But I have no idea how to capture the caret position.....
There doesn't seem to be another default method to know where the caret position.
Any help?
Thanks,
V

Well first of all to even have a caret in your combo box you need to make sure you have it set as editable.
This is a good tutorial to show you how...
http://java.sun.com/docs/books/tutorial/uiswing/components/combobox.html#editable
Using the example ComboBoxDemo2.java from that tutorial I was able to add a few lines of code to get the caret position. Since the JComboBox class does not implement the getCaretPosition() you can use the method getEditor() to return the ComboBoxEditor. Then use the ComboBoxEditor's method getEditorComponent and cast it to a JTextField. Now you can use the JTextField's method getCaretPosition() to return the caret position.
Does that make sense? I was able to get it to work that way.
Good luck,
.kim

Caret position in HTML JTextPane

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