Picking up Items by triggers

Is there a way to pick up items by triggers? Like let's say Player 1 presses "S" (stop) and makes the action Pick all items in this region and put it in hero's item pack.

Something like this should work:

Item - Pick every item in (Playable map area) and do (Hero - Give (Picked item) to (Triggering unit))

Just change "Playable map area" to the region in question and set it to go off on whatever EVENT you wish.