#include <gtk/gtk.h>

void print_hello(GtkWidget *widget, gpointer data)
{
  g_print("Hello World\n");
}

void activate(GtkApplication *app, gpointer user_data)
{
  GtkWidget *window, *box, *toolbar;
  GtkWidget *icon_new, *icon_quit;
  GtkToolItem *tool_new, *tool_quit;

  window = gtk_application_window_new(app);
  gtk_window_set_default_size(GTK_WINDOW(window), 200, 200);

  box = gtk_box_new(GTK_ORIENTATION_VERTICAL, 0);
  gtk_container_add(GTK_CONTAINER(window), box);
  toolbar = gtk_toolbar_new();
  gtk_box_pack_start(GTK_BOX(box), toolbar, FALSE, FALSE, 0);

  icon_new = gtk_image_new_from_icon_name("document-new",
					  GTK_ICON_SIZE_LARGE_TOOLBAR);
  tool_new = gtk_tool_button_new(icon_new, NULL);
  gtk_toolbar_insert(GTK_TOOLBAR(toolbar), tool_new, -1);
  g_signal_connect(tool_new, "clicked", G_CALLBACK(print_hello), NULL);

  icon_quit = gtk_image_new_from_icon_name("application-exit",
					   GTK_ICON_SIZE_LARGE_TOOLBAR);
  tool_quit = gtk_tool_button_new(icon_quit, NULL);
  gtk_toolbar_insert(GTK_TOOLBAR(toolbar), tool_quit, -1);
  g_signal_connect_swapped(tool_quit, "clicked",
			   G_CALLBACK(gtk_widget_destroy), window);

  gtk_widget_show_all(window);
}

int main(int argc, char *argv[])
{
  GtkApplication *app;
  int status;

  app = gtk_application_new(NULL, G_APPLICATION_FLAGS_NONE);
  g_signal_connect(app, "activate", G_CALLBACK(activate), NULL);
  status = g_application_run(G_APPLICATION(app), argc, argv);
  g_object_unref(app);

  return status;
}