Name: rk38400 Date: 05/13/98


Swing 1.0.2, Solaris 2.5.1 and cg6 frame buffer (if it matters)

Changing text in a wrappable text area is unpredictable.
The end of the line for a wrap is sometimes terminated early
so that the end of the text to be written is not written, instead
the previous line end remains. I have trouble in some situations
with this in the program I am developing.
 
I am not certain that the included example code shows the same
problem I am having, but it shows that something is strange.
It looks as if some information is not properly updated when
changing the text.

Try the program with index (at the end) set to 0 and 1, you
will get different behaviour.

This is what I see:
 index = 0
     Part of the r in for remains when the text is changed
 index = 1
     The 'r' in for is cut in the middle

What is interesting is that 'for' is placed differently depending
 * on the previous string.
 */

import java.awt.*;
import java.awt.event.*;
import com.sun.java.swing.*;


public class bug8 implements ActionListener
{
  public static void main (String argv[])
  {
    JFrame frame = new JFrame("Bug");

    // Get the top level container
    Container contentPane = frame.getContentPane();
    contentPane.setLayout(new BorderLayout());
    
    JTextArea textarea = new JTextArea();
    JButton change = new JButton("Change");
    
    textarea.setLineWrap(true);
    textarea.setWrapStyleWord(true);
    change.setActionCommand("change");

    bug8 bug8 = new bug8(textarea);
    change.addActionListener(bug8);
    
    contentPane.add(textarea, "North");
    contentPane.add(change, "South");

    frame.setSize(200,200);
    frame.show();
  }

  public bug8 (JTextArea textarea)
  {
    this.textarea = textarea;
  }

  
  public void actionPerformed (ActionEvent event)
  {
    if (index++ == 0)
      textarea.setText("iiiiiiiiiiii iiiiji ijisjd saijsi effdfiiiiiiii for new line");
    else
      {
index = 0;
textarea.setText("XXXXXXXXXXXXXXXXXXX Din new line");
      }
  }

  private JTextArea textarea;
  // Also try this with 1!
  private int index = 0;
}
(Review ID: 30261)
======================================================================