Re-organize all projects (#4166)

Content.Client/Hands/HandButton.cs

@@ -0,0 +1,47 @@
+using Content.Client.Items.UI;
+using Content.Shared.Hands.Components;
+using Robust.Client.Graphics;
+using Robust.Client.UserInterface.Controls;
+
+namespace Content.Client.Hands
+{
+    public class HandButton : ItemSlotButton
+    {
+        private bool _activeHand;
+        private bool _highlighted;
+
+        public HandButton(Texture texture, Texture storageTexture, string textureName, Texture blockedTexture, HandLocation location) : base(texture, storageTexture, textureName)
+        {
+            Location = location;
+
+            AddChild(Blocked = new TextureRect
+            {
+                Texture = blockedTexture,
+                TextureScale = (2, 2),
+                MouseFilter = MouseFilterMode.Stop,
+                Visible = false
+            });
+        }
+
+        public HandLocation Location { get; }
+        public TextureRect Blocked { get; }
+
+        public void SetActiveHand(bool active)
+        {
+            _activeHand = active;
+            UpdateHighlight();
+        }
+
+        public override void Highlight(bool highlight)
+        {
+            _highlighted = highlight;
+            UpdateHighlight();
+        }
+
+        private void UpdateHighlight()
+        {
+            // always stay highlighted if active
+            base.Highlight(_activeHand || _highlighted);
+        }
+    }
+}