text: #include "my_application.h"
  
  #include <flutter_linux/flutter_linux.h>
  #ifdef GDK_WINDOWING_X11
  #include <gdk/gdkx.h>
  #endif
  
  #include "flutter/generated_plugin_registrant.h"
  
  struct _MyApplication {
    GtkApplication parent_instance;
    char** dart_entrypoint_arguments;
  };
  
  G_DEFINE_TYPE(MyApplication, my_application, GTK_TYPE_APPLICATION)
  
  // Implements GApplication::activate.
  static void my_application_activate(GApplication* application) {
    MyApplication* self = MY_APPLICATION(application);
    GtkWindow* window =
        GTK_WINDOW(gtk_application_window_new(GTK_APPLICATION(application)));
  
    // Use a header bar when running in GNOME as this is the common style used
    // by applications and is the setup most users will be using (e.g. Ubuntu
    // desktop).
    // If running on X and not using GNOME then just use a traditional title bar
    // in case the window manager does more exotic layout, e.g. tiling.
    // If running on Wayland assume the header bar will work (may need changing
    // if future cases occur).
    gboolean use_header_bar = TRUE;
  #ifdef GDK_WINDOWING_X11
    GdkScreen* screen = gtk_window_get_screen(window);
    if (GDK_IS_X11_SCREEN(screen)) {
      const gchar* wm_name = gdk_x11_screen_get_window_manager_name(screen);
      if (g_strcmp0(wm_name, "GNOME Shell") != 0) {
        use_header_bar = FALSE;
      }
    }
  #endif
    if (use_header_bar) {
      GtkHeaderBar* header_bar = GTK_HEADER_BAR(gtk_header_bar_new());
      gtk_widget_show(GTK_WIDGET(header_bar));
      gtk_header_bar_set_title(header_bar, "cupertino_customscrollview_2");
      gtk_header_bar_set_show_close_button(header_bar, TRUE);
      gtk_window_set_titlebar(window, GTK_WIDGET(header_bar));
    } else {
      gtk_window_set_title(window, "cupertino_customscrollview_2");
    }
  
    gtk_window_set_default_size(window, 1280, 720);
    gtk_widget_show(GTK_WIDGET(window));
  
    g_autoptr(FlDartProject) project = fl_dart_project_new();
    fl_dart_project_set_dart_entrypoint_arguments(project, self->dart_entrypoint_arguments);
  
    FlView* view = fl_view_new(project);
    gtk_widget_show(GTK_WIDGET(view));
    gtk_container_add(GTK_CONTAINER(window), GTK_WIDGET(view));
  
    fl_register_plugins(FL_PLUGIN_REGISTRY(view));
  
    gtk_widget_grab_focus(GTK_WIDGET(view));
  }
  
  // Implements GApplication::local_command_line.
  static gboolean my_application_local_command_line(GApplication* application, gchar*** arguments, int* exit_status) {
    MyApplication* self = MY_APPLICATION(application);
    // Strip out the first argument as it is the binary name.
    self->dart_entrypoint_arguments = g_strdupv(*arguments + 1);
  
    g_autoptr(GError) error = nullptr;
    if (!g_application_register(application, nullptr, &error)) {
       g_warning("Failed to register: %s", error->message);
       *exit_status = 1;
       return TRUE;
    }
  
    g_application_activate(application);
    *exit_status = 0;
  
    return TRUE;
  }
  
  // Implements GObject::dispose.
  static void my_application_dispose(GObject* object) {
    MyApplication* self = MY_APPLICATION(object);
    g_clear_pointer(&self->dart_entrypoint_arguments, g_strfreev);
    G_OBJECT_CLASS(my_application_parent_class)->dispose(object);
  }
  
  static void my_application_class_init(MyApplicationClass* klass) {
    G_APPLICATION_CLASS(klass)->activate = my_application_activate;
    G_APPLICATION_CLASS(klass)->local_command_line = my_application_local_command_line;
    G_OBJECT_CLASS(klass)->dispose = my_application_dispose;
  }
  
  static void my_application_init(MyApplication* self) {}
  
  MyApplication* my_application_new() {
    return MY_APPLICATION(g_object_new(my_application_get_type(),
                                       "application-id", APPLICATION_ID,
                                       "flags", G_APPLICATION_NON_UNIQUE,
                                       nullptr));
  }
  