sbox-public/engine/Sandbox.Engine/Systems/UI/Controls/BasePopup.cs

namespace Sandbox.UI;

/// <summary>
/// A panel that gets deleted automatically when clicked away from
/// </summary>
public abstract class BasePopup : Panel
{
	static List<BasePopup> AllPopups = new();

	/// <summary>
	/// Stay open, even when CloseAll popups is called
	/// </summary>
	public bool StayOpen { get; set; }

	public static void CloseAll( Panel exceptThisOne = null )
	{
		if ( AllPopups.Count == 0 )
			return;

		AllPopups.RemoveAll( x => !x.IsValid() );

		BasePopup floater = null;

		if ( exceptThisOne is Panel flt )
		{
			floater = flt.AncestorsAndSelf.OfType<BasePopup>().FirstOrDefault();
		}

		foreach ( var panel in AllPopups.ToArray() )
		{
			if ( panel == floater ) continue;
			if ( panel.StayOpen && panel.Parent.IsValid() ) continue;

			try
			{
				AllPopups.Remove( panel );
				panel.Delete();
			}
			catch
			{
				// ignored
			}
		}
	}

	public BasePopup()
	{
		AllPopups.Add( this );
	}

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

		AllPopups.Remove( this );
	}
}