Undo/Redo default implementation?

[rakkar]

I want undo/redo for text, in the plain text editor. I don't need undo/redo for any other command. I was going to implement QUndoStack, but thought maybe this was already implemented, since it's such a common operation. Anyone know of this?

[wysota]

Undo/redo is implemented in QPlainTextEdit.