/// <summary>
/// Execute drop action.
/// </summary>
/// <param name="eventData">Will contain item that is expected to drop here.</param>
public void OnDrop(PointerEventData eventData)
{
InventoryItem eventSourceItem = eventData.pointerDrag.GetComponent <InventoryItem>();
if (!eventSourceItem.CurrentParent.CanChildMove)
{
return;
}
// Source Item must be present.
if (eventSourceItem == null)
{
throw new ArgumentException($"{nameof(InventorySlot)} dropped object is not item.");
}
// Slot must be valid for taking items.
if (!SlotType.CanTakeItems())
{
return;
}
// Slot must be eligible for source item.
if (!SlotType.CanAcceptItem(eventSourceItem.CurrentItemData.Type))
{
return;
}
if (newItemCallback != null && newItemCallback.Invoke(this, eventSourceItem))
{
return;
}
// Stacking happens if is not free and other item is also in stack-able category
if (!IsFree && SlotType.CanStackItems() && CurrentItem.CanStackWith(eventSourceItem))
{
CurrentItem.UpdateStackSize(eventSourceItem);
return;
}
// On free we can insert item.
if (IsFree)
{
AdoptChild(eventSourceItem);
return;
}
}
