Toggle state of button with drag and drop
I'm trying create a simple "fill in the blank" sentence. So I have 4 texts (textbox) and 4 lines (invisible square) in the sentence. There is also a "submit" button, initially disable.
I want the state of the button to change to normal when any of the text is dragged onto any line. That was not a problem.
But then I want to change the state of the button back to disable when none of the text is any line, it seems impossible.
I have tried variables, and state triggers, and drag & drop. Looks like I'm missing something here, can anyone help me out?
Attached is the actual file I am working on just to test different approaches. Sorry if it is a little bit messy.