/// <summary>
/// Updates the slot indicator's visibility and position.
/// </summary>
/// <param name="inventorySlotBehaviour">If one is given, assume we're picking up an item. Otherwise, assume we're dropping an item.</param>
public void UpdateSlotIndicator(InventorySlotBehaviour inventorySlotBehaviour = null)
{
if (inventorySlotBehaviour != null && !_inventorySlotIndicatorBehaviour.Visible)
{
// If the slot indicator is invisible, make it visible and move it to the new slot.
_inventorySlotIndicatorBehaviour.MoveTo(inventorySlotBehaviour.transform.localPosition, true);
_inventorySlotIndicatorBehaviour.Visible = true;
}
else
{
// If the current slot has an item, then don't attempt to find another slot.
if (_slots[_currentSlotIndex].ItemBehaviour != null)
{
return;
}
int nextSlotIndex = -1;
for (int i = 0; i < _slots.Length; i++)
{
if (_slots[i].ItemBehaviour != null)
{
nextSlotIndex = i;
break;
}
}
// If there's a slot with an item, set it as the current slot and move the indicator to it.
// Otherwise hide the indicator.
if (nextSlotIndex != -1)
{
_currentSlotIndex = nextSlotIndex;
_inventorySlotIndicatorBehaviour.Visible = true;
_inventorySlotIndicatorBehaviour.MoveTo(_slots[_currentSlotIndex].transform.localPosition);
}
else
{
_inventorySlotIndicatorBehaviour.Visible = false;
}
}
}
/// <summary>
/// Picks up an item if one is nearby.
/// Called by the "pickup item" input action.
/// </summary>
/// <param name="context">The context of the input action.</param>
public void OnPickupItem(InputAction.CallbackContext context)
{
if (!SceneManager.GetActiveScene().isLoaded)
{
return;
}
if (!context.performed)
{
return;
}
ItemBehaviour selectedItem = GetNearbyItem();
if (selectedItem == null)
{
return;
}
InventorySlotBehaviour nextAvailableSlot = _slots.FirstOrDefault(x => x.ItemBehaviour == null);
if (nextAvailableSlot == null)
{
// All inventory slots are taken.
// Swap the current item with the nearby item.
OnDropItem(context, false);
OnPickupItem(context);
return;
}
// Pickup the item into the next available slot.
nextAvailableSlot.PickupItem(selectedItem);
selectedItem.gameObject.SetActive(false);
UpdateSlotIndicator(nextAvailableSlot);
}