Soreboard.cs

using Sandbox;
using Sandbox.Hooks;
using Sandbox.UI;
using Sandbox.UI.Construct;
using System;
using System.Collections.Generic;

namespace Sandbox.UI
{
	public partial class Scoreboard<T> : Panel where T : ScoreboardEntry, new()
	{
		public Panel Canvas { get; protected set; }
		public TextEntry Input { get; protected set; }

		Dictionary<int, T> Entries = new ();

		public Scoreboard()
		{
			StyleSheet = StyleSheet.FromFile( "/ui/scoreboard/Scoreboard.scss" );
			AddClass( "scoreboard" );

			AddHeader();

			Canvas = Add.Panel( "canvas" );

			PlayerInfo.OnPlayerAdded += AddPlayer;
			PlayerInfo.OnPlayerUpdated += UpdatePlayer;
			PlayerInfo.OnPlayerRemoved += RemovePlayer;

			foreach ( var player in PlayerInfo.All )
			{
				AddPlayer( player );
			}
		}

		public override void Tick()
		{
			base.Tick();

			SetClass( "open", Player.Local?.Input.Down( InputButton.Score ) ?? false );
		}


		protected virtual void AddHeader() 
		{
			var p = Add.Panel( "header" );
			p.Add.Label( "Name", "name" );
			p.Add.Label( "Kills", "kills" );
			p.Add.Label( "Deaths", "deaths" );
			p.Add.Label( "Ping", "ping" );
		}

		protected virtual void AddPlayer( PlayerInfo.Entry entry )
		{
			var p = Canvas.AddChild<T>();
			p.UpdateFrom( entry );

			Entries[entry.Id] = p;
		}

		protected virtual void UpdatePlayer( PlayerInfo.Entry entry )
		{
			if ( Entries.TryGetValue( entry.Id, out var panel ) )
			{
				panel.UpdateFrom( entry );
			}
		}

		protected virtual void RemovePlayer( PlayerInfo.Entry entry )
		{
			if ( Entries.TryGetValue( entry.Id, out var panel ) )
			{
				panel.Delete();
				Entries.Remove( entry.Id );
			}
		}
	}
}