public void StopEditing()
{
// don't bother if we're not editing
if (this.EditingCell == CellPos.Empty)
{
return;
}
this.EditingCellEditor.StopEditing();
this.Invalidate(this.RowRect(this.editingCell.Row));
this.editingCell = CellPos.Empty;
this.curentCellEditor = null;
}