OpenTween.TweenMain.MoveMiddle C# (CSharp) Method

        private void MoveMiddle()
        {
            ListViewItem _item;
            int idx1;
            int idx2;

            if (_curList.SelectedIndices.Count == 0) return;

            int idx = _curList.SelectedIndices[0];

            _item = _curList.GetItemAt(0, 25);
            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;

            idx -= Math.Abs(idx1 - idx2) / 2;
            if (idx < 0) idx = 0;

            _curList.EnsureVisible(_curList.VirtualListSize - 1);
            _curList.EnsureVisible(idx);
        }