Merge remote-tracking branch 'refs/remotes/ShiftOS-Rewind/master'

1 files changed, 71 insertions, 0 deletions

diff --git a/ShiftOS.Engine/Misc/EventList.cs b/ShiftOS.Engine/Misc/EventList.cs
new file mode 100644
index 0000000..e5202e7
--- /dev/null
+++ b/ShiftOS.Engine/Misc/EventList.cs
@@ -0,0 +1,71 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+
+namespace ShiftOS.Engine.Misc
+{
+	[Serializable]
+	public class EventList<T> : List<T>
+	{
+		public event EventHandler<EventListArgs<T>> ItemAdded;
+		public event EventHandler<EventListArgs<T>> ItemRemoved;
+
+		public new void Add(T obj)
+		{
+			base.Add(obj);
+			ItemAdded?.Invoke(this, new EventListArgs<T>(obj));
+		}
+
+		public new void AddRange(IEnumerable<T> objs)
+		{
+			foreach (var obj in objs)
+			{
+				base.Add(obj);
+				ItemAdded?.Invoke(this, new EventListArgs<T>(obj));
+			}
+		}
+
+		public new bool Remove(T obj)
+		{
+			var b = base.Remove(obj);
+
+			ItemRemoved?.Invoke(this, new EventListArgs<T>(obj));
+			return b;
+		}
+
+		public new void RemoveAt(int index)
+		{
+			base.RemoveAt(index);
+			ItemRemoved?.Invoke(this, new EventListArgs<T>(default));
+		}
+
+		public new void RemoveAll(Predicate<T> match)
+		{
+			//will this work
+			foreach (var item in this.Where(match as Func<T, bool> ?? throw new InvalidOperationException()))
+			{
+				Remove(item);
+			}
+		}
+
+		public new void RemoveRange(int start, int end)
+		{
+			for (var i = start; i <= end; i++)
+			{
+				Remove(this[i]);
+			}
+		}
+
+		public new void Clear()
+		{
+			RemoveAll(x => true);
+		}
+	}
+
+	public class EventListArgs<T> : EventArgs
+	{
+		public EventListArgs(T item) => Item = item;
+
+		public T Item { get; }
+	}
+}