Comments on: Add Undo/Redo functionality to a Java app

By: GrassEh

GrassEh — Fri, 25 Nov 2011 15:54:31 +0000

Great article and very useful !
But I have a remark about the setValue() thing.
Since every edits are done by the user himself (via an UI in general), I think it is better to register a new edit (via postEdit()) at the place where the “setValue()” method is actually called instead of the method itself.

For example imagine you have a method called “enterKeyPressed()” that you would called after the user press the Enter key or whatever. In this method you would then do:

undoSupport.postEdit(edit);
setValue(…);

This would avoid to post unecessary edits for example if you programmatically called the setValueAt() method.
It would also avoid you to have several setValueAt() methods.

Regards,
GrassEh

By: Morgan

Morgan — Sun, 22 May 2011 08:59:59 +0000

Thank you so much for this. It’s a brilliant little tutorial on undo/redo and it’s most helpful.

By: tikka

tikka — Mon, 21 Feb 2011 00:32:00 +0000

“I write this post to show you how simple undo in Java is and how it can be easily added to an existing application.”

Very true. This is one of the most helpful post on undo I came across. Thank you!

By: admin

admin — Fri, 11 Jun 2010 15:34:07 +0000

Glad to help,
Dominik

By: Pete

Pete — Thu, 10 Jun 2010 16:03:59 +0000

Cool.. good one.