riversong code showcase

Source/Riversong/Game/UI/Framework/UIModel.cs

@@ -0,0 +1,33 @@
+using System;
+using System.Collections.Generic;
+using System.Runtime.CompilerServices;
+using UnityEngine.UIElements;
+
+namespace DanieleMarotta.RiversongCodeShowcase
+{
+    public class UIModel : IUIModel
+    {
+        public event EventHandler<BindablePropertyChangedEventArgs> propertyChanged;
+
+        public event Action Changed;
+
+        protected void SetProperty<T>(ref T field, T value, [CallerMemberName] string property = null)
+        {
+            if (EqualityComparer<T>.Default.Equals(field, value)) return;
+
+            field = value;
+
+            NotifyPropertyChanged(property);
+        }
+
+        protected void NotifyPropertyChanged(string property = null)
+        {
+            propertyChanged?.Invoke(this, new BindablePropertyChangedEventArgs(property));
+        }
+
+        public void NotifyChanged()
+        {
+            Changed?.Invoke();
+        }
+    }
+}