Forex_Strategy_Builder.Actions.MenuUseLogicalGroups_OnClick C# (CSharp) Method

        protected override void MenuUseLogicalGroups_OnClick(object sender, EventArgs e)
        {
            ToolStripMenuItem mi = (ToolStripMenuItem)sender;

            if (mi.Checked == true)
            {
                Configs.UseLogicalGroups = mi.Checked;
                RebuildStrategyLayout();
                return;
            }

            // Check if the current strategy uses logical groups
            bool usefroup = false;
            List<string> closegroup = new List<string>();
            foreach (IndicatorSlot slot in Data.Strategy.Slot)
            {
                if (slot.SlotType == SlotTypes.OpenFilter && slot.LogicalGroup != "A")
                    usefroup = true;

                if (slot.SlotType == SlotTypes.CloseFilter)
                {
                    if (closegroup.Contains(slot.LogicalGroup) || slot.LogicalGroup == "all")
                        usefroup = true;
                    else
                        closegroup.Add(slot.LogicalGroup);
                }
            }

            if (!usefroup)
            {
                Configs.UseLogicalGroups = false;
                RebuildStrategyLayout();
            }
            else
            {
                MessageBox.Show(
                    Language.T("The strategy requires logical groups.") + Environment.NewLine +
                    Language.T("\"Use Logical Groups\" option cannot be switched off."),
                    Language.T("Logical Groups"),
                    System.Windows.Forms.MessageBoxButtons.OK,
                    System.Windows.Forms.MessageBoxIcon.Information);

                mi.Checked = true;
            }

            return;
        }