Detailed Description

undo point: a point in the undo history to which it is possible to return.
undo record: record in the undo history about one chunk of a change. each record has an undo code, which determines the nature of the change and the undo handler.

Functions
"bool"	create_undo_point (*args)
	create_undo_point(action_name, label) -> bool Create a new restore point.

"qstring *"	get_undo_action_label ()
	get_undo_action_label() -> str Get the label of the action that will be undone.

"qstring *"	get_redo_action_label ()
	get_redo_action_label() -> str Get the label of the action that will be redone.

"bool"	perform_undo ()
	perform_undo() -> bool Perform undo.

"bool"	perform_redo ()
	perform_redo() -> bool Perform redo.

Function Documentation

"bool" create_undo_point ( * args )

The user can undo to this point in the future.

Parameters

bytes	(C++: const uchar *) body of the record for UNDO_ACTION_START
size	(C++: size_t) size of the record for UNDO_ACTION_START

Returns: : success; fails if undo is disabled create_undo_point(bytes) -> bool

Parameters

bytes uchar const *

"qstring *" get_redo_action_label ( )

This function returns the text that can be displayed in the redo menu

"qstring *" get_undo_action_label ( )

This function returns the text that can be displayed in the undo menu

"bool" perform_redo ( )

"bool" perform_undo ( )