gtk:text-buffer-enable-undo (object)

object -- a gtk:text-buffer object
setting -- true to enable undo

The accessor for the enable-undo slot gets or sets whether the text buffer is saving modifications to the text buffer to allow for undo and redo actions. If enabled, the user will be able to undo the last number of actions up to the gtk:text-buffer-max-undo-levels value.

See the gtk:text-buffer-begin-irreversible-action and gtk:text-buffer-end-irreversible-action functions to create changes to the text buffer that cannot be undone.