CraftingComponentButton.cs

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using Loot.Api.Strategy;
using Loot.UI.Common.Controls.Button;
using Microsoft.Xna.Framework.Graphics;
using Terraria;
using Terraria.UI;

namespace Loot.UI.Tabs.CraftingTab
{
    internal abstract class CraftingComponentButton : GuiInteractableItemButton
    {
        public CraftingComponentLink Link;

        internal CraftingComponentButton(ButtonType buttonType, int netId = 0, int stack = 0, Texture2D hintTexture = null, string hintText = null, string hintOnHover = null) : base(buttonType, netId, stack, hintTexture, hintText, hintOnHover)
        {
            RightClickFunctionalityEnabled = false;
            TakeUserItemOnClick = false;
            HintOnHover = " (click to unslot)";
        }

        public abstract RollingStrategy GetRollingStrategy(Item item, RollingStrategyProperties rollingStrategyProperties);

        public override void PostOnClick(UIMouseEvent evt, UIElement e)
        {

        }

        public override void ChangeItem(int type, Item item = null)
        {
            if (item != null)
            {
                SetLink(new CraftingComponentLink(item, CraftingComponentLink.ComponentSource.Dynamic));
            }
            else
            {
                var component = new Item();
                component.SetDefaults(type);
                SetLink(new CraftingComponentLink(component, CraftingComponentLink.ComponentSource.Dynamic));
            }
        }

        public void SetLink(CraftingComponentLink link)
        {
            if (link == null)
            {
                Item.TurnToAir();
                Link = null;
            }
            else
            {
                Link = link;
                Item = Link.Component.Clone();
            }
            OnItemChange?.Invoke(Item);
        }
    }
}