Bloom.CollectionTab.LibraryListView.LoadSourceCollectionButtons C# (CSharp) Method

        private void LoadSourceCollectionButtons()
        {
            if (!_model.ShowSourceCollections)
            {
                _sourceBooksFlow.Visible = false;
                string lockNotice = LocalizationManager.GetString("CollectionTab.BookSourcesLockNotice",
                                                                               "This collection is locked, so new books cannot be added/removed.");

                var lockNoticeLabel = new Label()
                    {
                        Text = lockNotice,
                        Size = new Size(_primaryCollectionFlow.Width - 20, 15),
                        ForeColor = Palette.TextAgainstDarkBackground,
                        Padding = new Padding(10, 0, 0, 0)
                    };
                _primaryCollectionFlow.Controls.Add(lockNoticeLabel);
                return;
            }

            var collections = _model.GetBookCollections();
            //without this guy, the FLowLayoutPanel uses the height of a button, on *the next row*, for the height of this row!
            var invisibleHackPartner = new Label() {Text = "", Width = 0};

            _sourceBooksFlow.SuspendLayout();
            _sourceBooksFlow.Controls.Clear();
            var bookSourcesHeader = new ListHeader() { ForeColor = Palette.TextAgainstDarkBackground, Width = 450 };

            string shellSourceHeading = LocalizationManager.GetString("CollectionTab.SourcesForNewShellsHeading",
                                                                                "Sources For New Shells");
            string bookSourceHeading = LocalizationManager.GetString("CollectionTab.BookSourceHeading",
                                                                               "Sources For New Books");
            bookSourcesHeader.Label.Text = _model.IsShellProject ? shellSourceHeading : bookSourceHeading;
            // Don't truncate the heading: see https://jira.sil.org/browse/BL-250.
            if (bookSourcesHeader.Width < bookSourcesHeader.Label.Width)
                bookSourcesHeader.Width = bookSourcesHeader.Label.Width;
            invisibleHackPartner = new Label() {Text = "", Width = 0};
            _sourceBooksFlow.Controls.Add(invisibleHackPartner);
            _sourceBooksFlow.Controls.Add(bookSourcesHeader);
            _sourceBooksFlow.SetFlowBreak(bookSourcesHeader, true);

            foreach (BookCollection collection in collections.Skip(1))
            {
                if (_sourceBooksFlow.Controls.Count > 0)
                    _sourceBooksFlow.SetFlowBreak(_sourceBooksFlow.Controls[_sourceBooksFlow.Controls.Count - 1], true);

                int indexForHeader = _sourceBooksFlow.Controls.Count;
                if (LoadOneCollection(collection, _sourceBooksFlow))
                {
                    //without this guy, the FLowLayoutPanel uses the height of a button, on *the next row*, for the height of this row!
                    invisibleHackPartner = new Label() {Text = "", Width = 0};
                    _sourceBooksFlow.Controls.Add(invisibleHackPartner);
                    _sourceBooksFlow.Controls.SetChildIndex(invisibleHackPartner, indexForHeader);

                    //We showed at least one book, so now go back and insert the header
                    var collectionHeader = new Label()
                        {
                            Text = L10NSharp.LocalizationManager.GetDynamicString("Bloom", "CollectionTab." + collection.Name, collection.Name),
                            Size = new Size(_sourceBooksFlow.Width - 20, 20),
                            ForeColor = Palette.TextAgainstDarkBackground,
                            Padding = new Padding(10, 0, 0, 0)
                        };
                    collectionHeader.Margin = new Padding(0, 10, 0, 0);
                    collectionHeader.Font = _headerFont;
                    _sourceBooksFlow.Controls.Add(collectionHeader);
                    _sourceBooksFlow.Controls.SetChildIndex(collectionHeader, indexForHeader + 1);
                    _sourceBooksFlow.SetFlowBreak(collectionHeader, true);
                }
            }

            AddFinalLinks();
            _sourceBooksFlow.ResumeLayout();
        }