Get Row Height of a JTextArea

[YerMom]

Hi,

I have a JTextArea and set its contents dynamically. I need to dynamically change the height of the JTextArea depending on the number of rows of text in it.

I came up with the idea of getting the desired height value by multiplying the row height the number of rows as follows (ta is my JTextArea):

ta.setSize(400,ta.getRowHeight() * ta.getRows() );

However, the compiler gives the the following error:
[tt]getRowHeight() has protected access in javax.swing.JTextArea[/tt]

Is there a way to obtain the row height, or do I need to come up with a new solution?

I'm using the null layout manager.

Thanks!

 

[timw]

You would get access to that method if you were to extend the JTextArea class. Maybe overriding the 'setText' method could be a place to recalculate the controls size using the formula you've got. This may work since you're using a 'null' layout manager. If you were to try to use this technique with a layout manager, it probably wouldn't due to the JTextArea's container requiring a revalidate{} to cater for the controls new size.

Tim

 

[YerMom]

Thanks, Tim -- that's a great idea. I'll give it a try.