Drag and Drop With Feedback Layers BUT NOT Correct or Incorrect

Hello ELOUPEI​ 

I explored (like JoanneChen​) and abandoned solutions using states. Too complicated, because in addition, you want to use a built-in drag & drop to use the “automatic return of a movable element to its starting point if the learner places another element on top of it” function.

I suggest another way of doing this, which I have used before.

When you press the Finish button, you trigger the motion path of an element (mobile counter) that adds the value 1 to your TotalPlaced variable each time it encounters an element moved by the learner. If the mobile counter crosses 3 elements placed in the drop zone, TotalPlaced = 3, and the message “Too few” is displayed. Etc. Watch and study the attached demo, slide 2.

It's a bit of a DIY job, you have to make sure that the elements don't touch each other so that the mobile crosses each one of them, and not a bunch of elements, and the speed must not be too fast so that Storyline has time to trigger the triggers (yes, really!).

Here, the trajectory is straight, but imagine an activity where objects are dragged&dropped all over the screen. The mobile device can follow a very complex zigzag motion path to cross paths with the objects and count them. That's what I used a while ago.

Note: there is a small error in your triggers panel. The FINISH button ONLY appears/is active when the variable is between 4 and 6. It therefore cannot trigger other actions whose condition is that the variable is <3 or >6.

I hope this helps.