Scroll JTextArea Based on the Top Visible Line

I am having trouble with getting a JTextArea to scroll to a certain position in the middle of the text.

I had:

textArea.setCaretPosition(index);

The problem is that that displayed the desired line at the bottom of the visible area. I want to scroll so that it is at the top of the visible area. (My text area is of variable height and width, so I can't just add a constant to make it right.)

I tried this:

textArea.scrollRectToVisible(new Rectangle(0,

textArea.getLineOfOffset(index)

* (textArea.getHeight() / numberOfLines),

1,

1));

and this:

textArea.scrollRectToVisible(new Rectangle(0,

textArea.getLineOfOffset(index)

* textArea.getFont().getSize(),

1,

1));

but neither of those seems to do anything.

[876 byte] By [The.Joy.of.Javaa] at [2007-11-26 17:33:25]