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April 2000

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This page contains an archived post to the Java Answers Forum made prior to February 25, 2002. If you wish to participate in discussions, please visit the new Artima Forums.

Message:

Nearly auto scrolling in SWING

Posted by Laurent ROCHE on June 28, 2000 at 5:34 AM

I have exactly the same problem, and I have found an answer yet.
I have been looking around for a week, but still not found a correct solution.
My solution is:
private void addText(String s) {
_logText.append(s);

_logText.getCaret().setDot( _logText.getText().length() );
_pane.scrollRectToVisible(_logText.getVisibleRect() );

this.paint(this.getGraphics()); // should use "paintImmediately" but not usable for JDialog in 1.2 (should be in 1.3)
}

where _logText is the JTextArea and and _pane is the JScrollPane using _logText.
However this solution is not ideal as it is only scrolling when all the inserts in the JTextArea are finished.
If any one has a correct solution, let me know.

> Hi,

> In the AWT if I create a TextArea and then keep feeding information to that
> TextArea, it scrolls automatically to show me to most recently appended text
> in the component. However if use the swing equivalent, JTextArea this
> doesn't happen even if I wrap this class in a JScrollPane. It does bring up
> the scrollbar when text gets too much to fit in the window, but it doesn't
> automatically scroll down to show me the latest added text.

> Is there anyway I can change this?

> Thanks a lot,
> Russell






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