Scrollbar flickers after using setText()

hi, im using a jeditorpane to display html text. this works fine until the scrollbars are shown. the scrollbars flicker after the text is put into the editorpane using setText().

how can i avoid that?

thanks :-)

Thank you for the query. It is difficult to know what to say without more details, but please consider these two questions, which might help you out:

Have you got super.paintComponent(); as your first statement in your paintComponent method?

Where are you calling repaint(); ?

CR

hi, im not calling repaint as it is automatically called, isnt it? i have a simple jeditorpane and a jscrollpane:

JEditorPane p = new JEditorPane();
p.setContentType("text/html");
JScrollPane jsp = new JScrollPane(p);

String s = "<html><body>this is sentence...</body></html>"

as soon as the string s is too long to be displayed without scrolling the scrollbars are displayed and the scrollbars are flickering. do you need more details?

thanks :-)

I think I do need more details, please, yes.
CR

hi, hm...what kind of details do you need?

thanks in advance:-)

I have tried it myself, and it doesn't flicker.
Have you included the setEditable(false) call on your JEditorPane?
Try that.

CR

hi, yes, i set it using: pane.setEditable(false); so i think this is not the problem. can you post your code?

thanks

It is a crude thing, with the wrong formatting; you get one button at the top and one at the bottom. Maybe if I had used GridLayout rather than Border it would have been better. You get your scroll in the middle, a button which adds the Lord's Prayer (Paternoster) to the html text, and a button which exits the whole application.

import java.awt.BorderLayout;
import java.awt.HeadlessException;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
 
import javax.swing.JButton;
import javax.swing.JEditorPane;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
 
public class ScrollBarTest extends JFrame
{
public ScrollBarTest(String title) throws HeadlessException
{
super(title);
JPanel panel = new JPanel();
panel.setLayout(new BorderLayout());
add(panel);
 
final JEditorPane edit = new JEditorPane();
edit.setEditable(false);
edit.setContentType("text/html");
edit.setText("<html><body>this is sentence...</body></html>");
panel.add(new JScrollPane(edit), BorderLayout.CENTER);

JButton changeButton = new JButton("Change Text");
changeButton.setMnemonic('c');
changeButton.addActionListener(
new ActionListener()
{
public void actionPerformed(ActionEvent arg0)
{
edit.setText("<html><body>this is sentence...Our Father, Who art in heaven,Hallowed be Thy Name"+
"Thy Kingdom come,Thy will be done,on Earth as it is in Heaven."+
"Give us this day our daily bread.Forgive us our trespasses,As we forgive those who trespass against us."+
"Lead us not into temptationBut deliver us from evil.For Thine is the Kingdom, the Power and the Glory,For ever and ever.Amen"+
"</body></html>");
}// end method actionPerformed
}
);
panel.add(changeButton, BorderLayout.NORTH);

JButton exitButton = new JButton("Exit");
exitButton.setMnemonic('x');
exitButton.addActionListener(
new ActionListener()
{
public void actionPerformed(ActionEvent arg0)
{
System.exit(0);
}// end method actionPerformed
}
);
panel.add(exitButton, BorderLayout.SOUTH);
}// end constructor
 
/**
 * @param args
 */
public static void main(String[] args)
{
ScrollBarTest sbt = new ScrollBarTest("Test Scroll Bar.");
sbt.setSize(300, 200);
sbt.setDefaultCloseOperation(ScrollBarTest.EXIT_ON_CLOSE);
sbt.setVisible(true);
}// end method main
}// end class

You will have to get rid of the line breaks in the setText() call before you try compiling the code.

[Change: There appeared to be line breaks when I posted the reply, but they disappeared when I looked at the final result, so you might not have to get rid of line breaks.

]

CR
[ January 02, 2006: Message edited by: Campbell Ritchie ]

hi, hm, you were right. the scrollbars in your application dont flicker. but the scrollbars in my applet do still flicker...:-|.

more ideas?

thanks

Don't know.

I never knew it was an Applet; are you in the correct forum?
Please show us your code, so we can see the difference.

hi, unfortunately not...to much code. maybe i have to overwrite the paint method. hm

thanks

Show us your paint() and init() methods, or even "edited highlights."

This is a public discussion and the idea of this forum is for us all to be able to learn from one another. We shan't do that wihtout seeing more of your code.

hi, im sorry, i really cant post the code. is there any difference between using this in an applet or an application?

thanks:-)