using System.Collections;

namespace System.Windows.Forms
{
    public partial class ListViewItem
    {
        public class ListViewSubItemCollection : CollectionBase
        {
            private ListViewItem listViewItem;

            public ListViewSubItem this[int index] => index < 0 || index >= InnerList.Count ? null : InnerList[index] as ListViewSubItem;

            public void Add(ListViewSubItem item)
            {
                InnerList.Add(item);
                listViewItem.RaisePropertyChanged(nameof(SubItems));
            }

            public void Add(string text) => Add(new ListViewSubItem() { Text = text });

            public void AddRange(string[] items)
            {
                foreach (var item in items)
                    Add(item);
            }

            public new void Clear()
            {
                base.Clear();
                Add("");
            }

            internal ListViewSubItemCollection(ListViewItem listViewItem)
            {
                this.listViewItem = listViewItem;
                Clear();
            }
        }
    }
}