// Checks inventory use.
private void CheckInventoryUse()
{
if (KeyPress.InventorySlotId.HasValue)
{
ActionnedItem itemDropped = Player.Inventory.UseItem();
if (itemDropped != null)
{
CurrentScreen.AddDroppedItem(itemDropped);
}
}
}
/// <summary>
/// Uses an item of the inventory.
/// </summary>
/// <returns><see cref="ActionnedItem"/>; <c>Null</c> if item dropped.</returns>
internal ActionnedItem UseItem()
{
if (!Engine.Default.KeyPress.InventorySlotId.HasValue)
{
return(null);
}
int inventorySlotId = Engine.Default.KeyPress.InventorySlotId.Value - 1;
if (inventorySlotId >= DisplayableItems.Count)
{
return(null);
}
InventoryItem item = DisplayableItems.ElementAt(inventorySlotId);
Item ammoItemBase = Item.GetAmmoItem(item.BaseItem.Type);
InventoryItem ammoItem = _items.FirstOrDefault(it => ammoItemBase == it.BaseItem);
if (!ItemCanBeUseInContext(item.BaseItem.Type) || (ammoItemBase != null ? (ammoItem == null || !ammoItem.TryPick()) : !item.TryPick()))
{
return(null);
}
// Note : items used as ammunitions are never removed from the list.
if (item.Quantity == 0)
{
_items.Remove(item);
}
ActionnedItem droppedItem = null;
switch (item.BaseItem.Type)
{
case ItemType.Bomb:
droppedItem = new ActionnedBomb(ComputeDropCoordinates(Constants.Bomb.WIDTH, Constants.Bomb.HEIGHT));
break;
case ItemType.LifePotionSmall:
Engine.Default.Player.DrinkLifePotion(Constants.Inventory.SMALL_LIFE_POTION_RECOVERY_LIFE_POINTS);
break;
case ItemType.LifePotionMedium:
Engine.Default.Player.DrinkLifePotion(Constants.Inventory.MEDIUM_LIFE_POTION_RECOVERY_LIFE_POINTS);
break;
case ItemType.LifePotionLarge:
Engine.Default.Player.DrinkLifePotion(Constants.Inventory.LARGE_LIFE_POTION_RECOVERY_LIFE_POINTS);
break;
case ItemType.Lamp:
LampIsOn = !LampIsOn;
break;
case ItemType.Bow:
droppedItem = new ActionnedArrow(ComputeDropCoordinates(Constants.Arrow.WIDTH, Constants.Arrow.HEIGHT),
Engine.Default.Player.Direction, Engine.Default.Player);
break;
}
return(droppedItem);
}