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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; }
}
}
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