Este código demonstra a utilização dos serviços UI e DocList para mostrar o conteúdo de uma pasta do Google DRIVE em formato de árvore:
function doGet(e) { var app = UiApp.createApplication(); var scrollPanel = app.createScrollPanel(); // Scroll Panel is a Google Web Toolkit Widget tree = app.createTree(); // Tree is a Google Web Toolkit Widget tree.addItem(buildTree(app, "Enterprise 2.0 - Saqib")); scrollPanel.add(tree); scrollPanel.setHeight("500"); app.add(scrollPanel); return app;} function buildTree(a, searchTerm) { var tree = a.createTreeItem(); // TreeItem is Google Web Toolkit Widget tree.setText(searchTerm); // Use of the Google Apps Script DocList Service to retrieve the collections. var folders = DocsList.getFolder(searchTerm).getFolders(); for (var i = 0; i < folders.length; i++) { tree.addItem(buildTree(a, folders[i].getName())).setState(true, true); } var files = DocsList.getFolder(searchTerm).getFiles(); for (var i = 0; i < files.length; i++) { if (files[i].getType() == "document") { urlBase = "https://docs.google.com/document/edit?id="; iconHTML = "https://docs.google.com/images/doclist/icon_7_document_list.png"; } else if (files[i].getType() == "spreadsheet") { urlBase = "https://spreadsheets.google.com/ccc?key="; iconHTML = "https://docs.google.com/images/doclist/icon_7_spreadsheet_list.png"; } else if (files[i].getType() == "presentation") { urlBase = "https://docs.google.com/present/edit?id="; iconHTML = "https://docs.google.com/images/doclist/icon_7_presentation_list.png"; } else if (files[i].getType() == "drawing") { urlBase = "https://docs.google.com/drawings/edit?id="; iconHTML = "https://docs.google.com/images/doclist/icon_7_drawing_list.png"; } else { urlBase = "https://docs.google.com/fileview?id="; iconHTML = "https://docs.google.com/images/doclist/icon_7_generic_list.png"; } var image = a.createImage(iconHTML); var fileLabel = a.createAnchor(files[i].getName(), urlBase+ files[i].getId()); var fileLabelPanel = a.createHorizontalPanel(); fileLabelPanel.add(image); fileLabelPanel.add(fileLabel); tree.addItem(fileLabelPanel).setState(true, true); } return tree; }