OpenTween.TweenMain.GoMiddle C# (CSharp) Method

        private void GoMiddle()
        {
            if (_curList.VirtualListSize == 0)
                return;

            ListViewItem _item;
            int idx1;
            int idx2;
            int idx3;

            _item = _curList.GetItemAt(0, 0);
            if (_item == null)
            {
                idx1 = 0;
            }
            else
            {
                idx1 = _item.Index;
            }

            _item = _curList.GetItemAt(0, _curList.ClientSize.Height - 1);
            if (_item == null)
            {
                idx2 = _curList.VirtualListSize - 1;
            }
            else
            {
                idx2 = _item.Index;
            }
            idx3 = (idx1 + idx2) / 2;

            SelectListItem(_curList, idx3);
        }