Getting Visible text - JTextPane in a JScrollPane
I have a JTextPane wrapped in a JScrollPane. I want to be able to get the text that is visible at any given time. I want JUST the text that is visible, not the entire text of the document.
The method to use is obviously getText(int offset, int length), which is from JTextComponent.
I am wondering how I can retrieve the given offset (ie. the position of the very first visible character) and length (ie. the ending position of the last visible character minus the position of the starting character) from either the JScrollPane or the JTextPane.
I believe that this might be a rather complex problem as I'm qutie certain I am going to have to manually compute a few things by using several different views.
Any help anyone could offer would be most appreciated.
Hi camickr
I got the JScrollPane now thanks.
Now I'm still confused on how to solve the original problem.
import java.awt.event.ComponentEvent;
import java.awt.event.ComponentListener;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTextPane;
public class TestJTextPane extends JTextPane implements ComponentListener{
public static void main (String args[]){
JFrame mainFrame = new JFrame();
mainFrame.setSize(500,300);
mainFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
mainFrame.getContentPane().add(new JScrollPane(new TestJTextPane()));
mainFrame.setVisible(true);
public TestJTextPane(){
this.addComponentListener(this);
private void viewVisibleText(){
int offSet = 0;
int length = 0;
try{
JScrollPane scrollPane = (JScrollPane) this.getParent().getParent();
System.out.println(scrollPane.getViewport().getVisibleRect());
System.out.println(this.viewToModel(scrollPane.getViewport().getVisibleRect().getLocation()));
catch (Exception e){
e.printStackTrace();
public void componentResized(ComponentEvent arg0) {
viewVisibleText();
public void componentMoved(ComponentEvent arg0) {
viewVisibleText();
public void componentShown(ComponentEvent arg0) {
public void componentHidden(ComponentEvent arg0) {
// TODO Auto-generated method stub
}If you run this, you will see that the Rectangle for the getVisibleRect() does not changed, and the call to viewToModel will always return 0.
Can you please point out where I'm going wrong.
Thanks for the help
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