Added C# UIWidget API

NuakeNet/src/UI/UIComponent.cs

@@ -0,0 +1,93 @@
+using System;
+using System.Collections.Generic;
+using System.Drawing;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Nuake.Net
+{
+    [AttributeUsage(AttributeTargets.Field)]
+    public sealed class UIWidgetInput : Attribute
+    {
+        private bool HasDefaultValue = false;
+        private int DefaultValueInternalInt;
+        private float DefaultValueInternalFloat;
+        private bool DefaultValueInternalBool;
+        private string DefaultValueInternalString;
+
+        public UIWidgetInput(int DefaultValue)
+        {
+            DefaultValueInternalInt = DefaultValue;
+            HasDefaultValue = true;
+        }
+
+        public UIWidgetInput(float DefaultValue)
+        {
+            this.DefaultValueInternalFloat = DefaultValue;
+            HasDefaultValue = true;
+        }
+
+        public UIWidgetInput(string DefaultValue)
+        {
+            this.DefaultValueInternalString = DefaultValue;
+            HasDefaultValue = true;
+        }
+
+        public UIWidgetInput(bool DefaultValue)
+        {
+            this.DefaultValueInternalBool = DefaultValue;
+            HasDefaultValue = true;
+        }
+
+        public UIWidgetInput() { }
+    }
+
+    public class Style
+    {
+        protected ulong ID;
+
+        public Style(ulong id)
+        {
+            ID = id;
+        }
+    }
+
+    [AttributeUsage(AttributeTargets.Class)]
+    public sealed class ExternalHTML : Attribute
+    {
+        private string HTMLPath;
+        public ExternalHTML(string path)
+        {
+            HTMLPath = path;
+        }
+    }
+
+    public class UIWidget
+    {
+        public Style Style { get; set; }
+
+        private string HTML;
+
+        protected ulong ID { get; set; }
+
+        public UIWidget()
+        { }
+
+        protected UIWidget(ulong id)
+        {
+            ID = id;
+            Style = new Style(id);
+            HTML = "";
+        }
+
+        public virtual void OnInit() { }
+        public virtual void OnTick(float dt) { }
+
+        // Events
+        public virtual void OnClick()
+        {
+
+        }
+    }
+}