Grid Conditionals

Currently our conditionals system is set up to handle one question per component, so support for grids is a little bit difficult. Oddly we could actually do complex conditionals more easily, such as "at least 3 choices need to be X" than we could make each radio set a separate conditional. But in any case, it's a legitimate request, though maybe not something we're going to get to soon.

Would love to hear about any progress on this one.

Just found this older request for this reasonable feature. Marking the newer request as a duplicate.
#2315509: Webform conditionals not working with the grid field type

Reading the related issue carefully, there are really two related but distinct requests:

1) Use grid question as a source component in a rule test. (e.g. Questions 4 is Yes.)

2) Act on only one grid question as an action of the conditional. (e.g. Hide question 4.)

I'm still leaving the other question closed as a duplicate because I think both features should be addressed at the same time.

Absent a patch from someone else, or funding for this feature, I don't see this happening anytime soon. Selecting the grid question requires substantial reworking of both the UI for specifying the conditional rule and/or action, as well as changes to the jQuery that implements conditionals, the conditional parsing (topological sort and analysis) (because more than once conditional can now change a grid), and server-side conditional engine. It would be a fair bit of work.

The related issue (advanced grid component) is probably the way forward for this, but I thought I'd record my partial implementation of conditionals. I stopped part way through. It is particularly awkward to act on questions within a grid via conditional actions.

THIS PATCH IS NOT FUNCTIONAL. There is a lot left to do, and I don't expect to go in this direction, given the related issue's solution.