/// <summary>
/// Swap <see cref="UIItem"/>s from one <see cref="UIInventory"/> to the other.
/// </summary>
private void SwapUIItems(UIItem uiItem, bool fromPlayer, EventArg3 <Item, Trader, Trader> tradeEvent)
{
// Check if the trade was successful:
// (I know this is a very ugly way of doing it, but I don't want to introduce new EventArg(s) with boolean as their return type...)
// If we are transfering the item FROM the player, then the player shouldn't have the item in the inventory if the trade was successful and vice versa for the merchant.
if ((fromPlayer && !PlayerController.Player.Inventory.Items.Contains(uiItem.Item)) || (!fromPlayer && PlayerController.Player.Inventory.Items.Contains(uiItem.Item)))
{
//Remove the old UIItem:
if (fromPlayer)
{
uiPlayerInventory.ItemGrid.RemoveUIElement(uiItem);
}
else
{
uiMerchantInventory.ItemGrid.RemoveUIElement(uiItem);
}
//Assign a new instance to the reference that looks the same etc.:
uiItem = new UIItem(new Transform(uiItem.Transform.Size), uiItem.Sprite, screen, uiItem.Item);
//Swap the Trader references in the EventArg:
tradeEvent.SetArguments(
tradeEvent.Arg1, //Keep the item reference
tradeEvent.Arg3, //Switch reference
tradeEvent.Arg2); //Switch reference
//Create a new event list where the new swapped trade event and an entirely new EventArg3 can be created.
EventArgList onButtonClickEvents = new EventArgList(
tradeEvent,
new EventArg3 <UIItem, bool, EventArg3 <Item, Trader, Trader> >(SwapUIItems, uiItem, !fromPlayer /* We want to trigger the opposite reaction */, tradeEvent)
);
//Create the purchase/sell button whether or not it came from the player's inventory.
if (fromPlayer)
{
uiItem.CreatePurchaseButton(onButtonClickEvents);
}
else if (uiItem.Item.CanSell)
{
uiItem.CreateSellButton(onButtonClickEvents);
}
//Add the new UIItem to the right grid:
if (fromPlayer)
{
uiMerchantInventory.ItemGrid.AddUIElement(uiItem);
}
else
{
uiPlayerInventory.ItemGrid.AddUIElement(uiItem);
}
}
}
private void SetupItemButtons()
{
foreach (UIItem item in uiPlayerInventory.Items)
{
if (item.Item.CanSell)
{
var uiPointer = item; //Create a reference for the current UIItem in the iteration.
var itemPointer = item.Item; //Create a reference for the current Item in the iteration.
EventArg3 <Item, Trader, Trader> onSellClicked
= new EventArg3 <Item, Trader, Trader>(MerchantController.TradeItem, itemPointer, MerchantController.Merchant, PlayerController.Player);
//Create the sell button, allowing the player to sell the item to the merchant.
//Also, swap the UIItem after it's sold/bought to the opposite UI Inventory (Player => Merchant and Merchant => Player).
item.CreateSellButton(
new EventArgList(
onSellClicked,
new EventArg3 <UIItem, bool, EventArg3 <Item, Trader, Trader> >(SwapUIItems, uiPointer, true, onSellClicked)
));
}
}
foreach (UIItem item in uiMerchantInventory.Items)
{
var uiPointer = item; //Create a reference for the current UIItem in the iteration.
var itemPointer = item.Item; //Create a reference for the current Item in the iteration.
EventArg3 <Item, Trader, Trader> onPurchaseClicked
= new EventArg3 <Item, Trader, Trader>(MerchantController.TradeItem, itemPointer, PlayerController.Player, MerchantController.Merchant);
//Create the purchase button, allowing the player to buy the item from the merchant.
//Also, swap the UIItem after it's sold/bought to the opposite UI Inventory (Player => Merchant and Merchant => Player).
item.CreatePurchaseButton(
new EventArgList(
onPurchaseClicked,
new EventArg3 <UIItem, bool, EventArg3 <Item, Trader, Trader> >(SwapUIItems, uiPointer, false, onPurchaseClicked)
));
}
}
