namespace StudySystemClient { public class MainWindow : Gtk.ApplicationWindow { public MainWindow(Gtk.Application app, Client client) { Object(application: app); default_width = 360; default_height = 580; var header_bar = new Gtk.HeaderBar(); var title = new Gtk.Label("Study System Client"); title.add_css_class("title"); header_bar.title_widget = title; set_titlebar(header_bar); var activities_view = new ActivitiesView(client); set_child(activities_view); } } }