BrightIdeasSoftware.ObjectListView.CalculateToggledCheckState C# (CSharp) Method

        private CheckState CalculateToggledCheckState(OLVColumn column, CheckState currentState)
        {
            switch (currentState) {
                case CheckState.Checked: return column.TriStateCheckBoxes ? CheckState.Indeterminate : CheckState.Unchecked;
                case CheckState.Indeterminate: return CheckState.Unchecked;
                case CheckState.Unchecked:
                default: return CheckState.Checked;
            }
        }