Checkbox Demo (multiple selections)

i recently wrote something that needed a multiple choice item and i added the functionality to the listviewer. i maintain 3 lists to keep track of things, List1 is the oriignal list of choices, List2 is same as first but with a check box prepended to each item, List3 contains same number of items as in List1 but consists of Boolean values only - they represent which items are marked for selection at any one time:

here’s a before and after picture:

and here’s the link to the project:


This is a similar project but using two lists only and it can be managed with just a single list.