Functional GUI!

Content.Client/GameObjects/Components/Items/ClientHandsComponent.cs

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+using Content.Client.Interfaces.GameObjects;
+using Content.Client.UserInterface;
+using Content.Shared.GameObjects;
+using Lidgren.Network;
+using SS14.Client.Interfaces.UserInterface;
+using SS14.Client.UserInterface;
+using SS14.Shared;
+using SS14.Shared.GameObjects;
+using SS14.Shared.Interfaces.GameObjects;
+using SS14.Shared.IoC;
+using System.Collections.Generic;
+
+namespace Content.Client.GameObjects
+{
+    public class HandsComponent : SharedHandsComponent, IHandsComponent
+    {
+        private readonly Dictionary<string, IEntity> hands = new Dictionary<string, IEntity>();
+        public string ActiveIndex { get; private set; }
+
+        public IEntity GetEntity(string index)
+        {
+            if (hands.TryGetValue(index, out var entity))
+            {
+                return entity;
+            }
+
+            return null;
+        }
+
+        public override void HandleComponentState(ComponentState state)
+        {
+            var cast = (HandsComponentState)state;
+            hands.Clear();
+            foreach (var hand in cast.Hands)
+            {
+                hands[hand.Key] = Owner.EntityManager.GetEntity(hand.Value);
+            }
+
+            ActiveIndex = cast.ActiveIndex;
+
+            var uiMgr = (UserInterfaceManager)IoCManager.Resolve<IUserInterfaceManager>();
+
+            if (uiMgr.GetSingleComponentByGuiComponentType(GuiComponentType.HandsUi) == null)
+            {
+                uiMgr.AddComponent(new HandsGui());
+            }
+            uiMgr.ComponentUpdate(GuiComponentType.HandsUi, this);
+        }
+
+        public void SendChangeHand(string index)
+        {
+            Owner.SendComponentNetworkMessage(this, NetDeliveryMethod.ReliableUnordered, index);
+        }
+    }
+}