Thomas SMETS
Posts: 307
Nickname: tsmets
Registered: Apr, 2002
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Re: Following the last line
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Posted: Mar 24, 2004 3:57 PM
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Matthias,
Please do find the partial answer in this example !
There is still one thing I miss in my example ...
Why is it well shown only after I resized it ?
Not much else to say / write aboutit at the moment ....
I am struggling with paint () & repaint
Cheers,
\T,
/*
* Created on 24-Mar-04
*
*/
package com.tls.gui;
import java.awt.BorderLayout;
import java.awt.Container;
import java.awt.Dimension;
import java.awt.GridBagLayout;
import java.util.Random;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.JTextField;
/**
* @author tsmets
*
*/
public class ViewPort
extends JFrame
{
public static final char[] LOWER_ALPHABET = "azertyuiopmlkjhgfdsqwxcvbn".toCharArray();
private JTextArea textArea = null;
public ViewPort (String aFrameName)
{
super (aFrameName);
setDefaultCloseOperation (JFrame.EXIT_ON_CLOSE);
setSize ( 400, 400);
setVisible (true);
textArea = new JTextArea ( "Test Scroll AREA ");
JScrollPane scrollPane = new JScrollPane ( JScrollPane.VERTICAL_SCROLLBAR_ALWAYS,
JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);
scrollPane.add (textArea);
scrollPane.setViewportView (textArea);
Container container = getContentPane();
JComponent component = new JPanel ();
component.setOpaque (true);
component.add (scrollPane);
container.setLayout (new BorderLayout ());
container.add ( component, BorderLayout.CENTER);
container.add ( new JTextField (40), BorderLayout.NORTH);
new Thread (new TextAdder ()).start ();
}
public static void main(String[] args)
{
new ViewPort ("TestFrame");
}
public class TextAdder
implements Runnable
{
Random random = new Random ();
public void run ()
{
int i = 0,
j = 1;
while (true)
{
if ( (i % j) == 0)
{
textArea.setText ( textArea.getText() + "\n");
j = Math.abs(random.nextInt()) % 80 + 1;
System.out.println ("j = " + j);
}
System.out.println ("public void run () " + i);
textArea.setText ( textArea.getText() + " "
+ LOWER_ALPHABET[++i % LOWER_ALPHABET.length] );
// This is what interests you
textArea.setCaretPosition(textArea.getDocument().getLength());
try
{
Thread.sleep (5);
} catch (Exception e)
{
System.out.println ("Exception. Message " + e.getMessage());
}
}
}
}
}
For colorizing of the code you just need to annoy Bill ;)
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