man Tk::TextUndo (3): perl/tk text widget with bindings to undo changes.

SYNOPSIS

use Tk::TextUndo;

$testundo = $parent->TextUndo(?-option=>value, ...?);

This IS-A text widget with an unlimited 'undo' history but without a re'undo' capability.

The "TextUndo" widget has the same bindings as the Text widget. In addition there are the following bindings:

Event <L4> <<Undo>>: undo the last change. Pressing <L4> several times undo step by step the changes made to the text widget.

The "TextUndo" widget has the same methods as "Text" widget. Additional methods for the "TextUndo" widget are:

$text->Load($filename);: Loads the contents of the $filename into the text widget. Load() delete the previous contents of the text widget as well as it's undo history of the previous file.
$text->Save(?$otherfilename?): Save contents of the text widget to a file. If the $otherfilename is not specified, the text widget contents writes the file of $filename used in the last Load() call. If no file was previously Load()'ed an error message pops up. The default filename of the last Load() call is not overwriten by $otherfilename.
$text->FileName(?$otherfilename?): If passed an argument sets the file name associated with the loaded document. Returns the current file name associated with the document.

widget, text, undo