BrightIdeasSoftware.FilterMenuBuilder.CreateFilteringMenuItem C# (CSharp) Метод

        protected virtual ToolStripMenuItem CreateFilteringMenuItem(OLVColumn column, List<ICluster> clusters)
        {
            ToolStripCheckedListBox checkedList = new ToolStripCheckedListBox();
            checkedList.Tag = column;
            foreach (ICluster cluster in clusters)
                checkedList.AddItem(cluster, column.ValuesChosenForFiltering.Contains(cluster.ClusterKey));
            if (!String.IsNullOrEmpty(SELECT_ALL_LABEL)) {
                int checkedCount = checkedList.CheckedItems.Count;
                if (checkedCount == 0)
                    checkedList.AddItem(SELECT_ALL_LABEL, CheckState.Unchecked);
                else
                    checkedList.AddItem(SELECT_ALL_LABEL, checkedCount == clusters.Count ? CheckState.Checked : CheckState.Indeterminate);
            }
            checkedList.ItemCheck += new ItemCheckEventHandler(HandleItemCheckedWrapped);

            ToolStripMenuItem clearAll = new ToolStripMenuItem(CLEAR_ALL_FILTERS_LABEL, ClearFilteringImage, delegate(object sender, EventArgs args) {
                this.ClearAllFilters(column);
            });
            ToolStripMenuItem apply = new ToolStripMenuItem(APPLY_LABEL, FilteringImage, delegate(object sender, EventArgs args) {
                this.EnactFilter(checkedList, column);
            });
            ToolStripMenuItem subMenu = new ToolStripMenuItem(FILTERING_LABEL, null, new ToolStripItem[] {
                clearAll, new ToolStripSeparator(), checkedList, apply });
            return subMenu;
        }