UnDo/ ReDo Buffer ?

[Claus Dietrich <claus.dietrich@xxxxxxxxxx>]

Hi

I developed an app for scanning documents. It depicts the scans in a 
ListView with a thumbnail preview. The order of the scans in the 
ListView can be changed and scans can also be deleted. What was missing 
so far is an UnDo function. So I asked an AI about a suitable concept 
and got a reasonable proposal based on a class for scanned document and 
a collection of these classes and a history stack. I tested it in a 
pilot project and it turned out to be feasible and efficient.

In parallel I found this in the Gambas-wiki: 
https://gambaswiki.org/edit/snippets/undoredobuffer

I don't understand this chapter. It seems to tell the reader, that there 
is a generic solution for any thinkable undo/redo action in an app. As 
this is beyond my imagination I kindly ask for some guidance resp. 
concepts for UnDo/ReDo functions und sample projects if available.

Best regards

Claus