// create a Slot (or use the optional supplied one) and populate it with the given object
protected Slot MakeSlot(UnityEngine.Object obj, Slot preMade = null)
{
GameObject go = null;
Slot slot = preMade;
if (slot != null)
{
// use the existing one and get its GameObject
go = slot.gameObject;
}
else
{
// make a child slot
go = Instantiate(slotPrefab.gameObject, transform);
slot = go.GetComponent <Slot>();
}
// make an item object inside it as a child
GameObject goi = Instantiate(itemPrefab.gameObject, slot.GetSlot());
Draggable item = goi.GetComponent <Draggable>();
item.SetObject(obj);
// set up all required pointers
slot.item = item;
slot.container = this;
item.slot = slot;
return(slot);
}
public void OnEndDrag(PointerEventData eventData)
{
if (!dragging)
{
return;
}
// raycast to find what we're dropping over
Slot target = GetSlotUnderMouse();
ObjectContainer containerTarget = null;
ObjectContainer containerDrag = slot.container;
bool legal = true;
// check that this move is OK with both containers - they can both veto it
if (target)
{
containerTarget = target.container;
// if there is a container and we can't drop into it for game logic reasons, cancel the drag
if (containerTarget != null)
{
if (containerTarget.CanDrop(this, target) == false)
{
legal = false;
}
}
// check the other way too, since the drag and drop is a swap
if (containerDrag != null)
{
if (containerDrag.CanDrop(target.item, slot) == false)
{
legal = false;
}
}
}
// we're Ok to move
if (legal)
{
Slot fromSlot = slot;
SwapWith(target,
containerDrag != null ? containerDrag.IsReadOnly() : true,
containerTarget != null ? containerTarget.IsReadOnly() : true);
// game logic - let both containers know about the update
if (containerTarget != null)
{
containerTarget.Drop(target, containerDrag);
}
if (containerDrag != null)
{
containerDrag.Drop(fromSlot, containerTarget);
}
}
else
{
// allow us to make a sound or anything similar that the rejecting container has specified
containerTarget.onDragFail.Invoke();
}
// return to our parent slot now
transform.SetParent(slot.GetSlot());
(transform as RectTransform).anchoredPosition3D = Vector3.zero;
dragging = false;
current = null;
// call the dragexit functions when we're placing, to unhighlight everything.
// at the slot level...
if (currentSlotOver)
{
currentSlotOver.OnDraggableExit();
}
// ...and at the container level
ObjectContainer oldContainer = currentSlotOver != null ? currentSlotOver.container : null;
if (oldContainer != null)
{
oldContainer.OnDraggableExit();
}
currentSlotOver = null;
currentSlotOver = null;
if (canvas)
{
canvas.sortingOrder = 0;
}
InventoryUI.Instance.UpdateInventory();
}