Show next button when all drop targets are occupied
I have a slide with multiple drop targets with multiple objects. Any object can drop on any target. I need to show the next button only when all drop targets are filled.
When there are two objects and two drop targets, I did it with declaring Boolean variables (True/False). It works. But for multiple drop targets and objects, this quickly become tiresome.
I found a trigger to change state when any ONE object drops on any of multiple drop targets. It would work only if there was an option of any of multiple objects drops on any of multiple drop targets.
Any ideas? Thanks