I'm creating a custom list field type which is basically a glorified multichoice field, but I want the checkboxes to be grouped by headings that the user can specify. For example:
Status1 SubStatus1 SubStatus2 Status2 SubStatus3 SubStatus4 SubStatus5
where the statuses are headings and the substatuses are checkboxes. I want the user to be able to specify these when they create the column in the list or if they go to the Edit Column page:
When the user selects one of the Statuses from the dropdown, I want the SubStatus textbox to populate the choices that should be placed under that heading (which the user should be able to edit). I've been playing around with using CAML in my fldtypes*.xml file in the PropertySchema with no success. Can this be done and is using CAML the right way to go about it?