namespace System.Windows.Forms
{
    public class ScrollEventArgs : EventArgs
    {
        public ScrollOrientation ScrollOrientation { get; }

        public ScrollEventType Type { get; }

        public int NewValue { get; set; }

        public int OldValue { get; } = -1;

        public ScrollEventArgs(ScrollEventType type, int newValue)
        {
            Type = type;
            NewValue = newValue;
        }

        public ScrollEventArgs(ScrollEventType type, int newValue, ScrollOrientation scroll)
        {
            Type = type;
            NewValue = newValue;
            ScrollOrientation = scroll;
        }

        public ScrollEventArgs(ScrollEventType type, int oldValue, int newValue)
        {
            Type = type;
            NewValue = newValue;
            OldValue = oldValue;
        }
        
        public ScrollEventArgs(ScrollEventType type, int oldValue, int newValue, ScrollOrientation scroll)
        {
            Type = type;
            NewValue = newValue;
            ScrollOrientation = scroll;
            OldValue = oldValue;
        }
    }

    public delegate void ScrollEventHandler(object sender, ScrollEventArgs e);
}