Dashboard/Quik/Controls/HierarchyEvents.cs

using System;

namespace Quik.Controls
{
    public class ParentChangedEventArgs : EventArgs
    {
        public Control NewParent { get; }

        public ParentChangedEventArgs(Control newParent)
        {
            NewParent = newParent;
        }

        public static ParentChangedEventArgs Disowned { get; } = new ParentChangedEventArgs(null);
    }

    public class RootChangedEventArgs : EventArgs
    {
        public RootControl NewRoot { get; }

        public RootChangedEventArgs(RootControl newRoot)
        {
            NewRoot = newRoot;
        }

        public static RootChangedEventArgs Disowned { get; } = new RootChangedEventArgs(null);
    }

    public class FocusChangedEventArgs : EventArgs
    {
        public Control Focused { get; }

        public FocusChangedEventArgs(Control focused)
        {
            Focused = focused;
        }
    }
}