#include <gtk/gtk.h>

/* signal handler for "toggled" signal of the CheckButton */

static void

toggled_cb (GtkToggleButton *toggle_button,

            gpointer         user_data)

{

  GtkWindow *window = user_data;

  if (gtk_toggle_button_get_active (toggle_button))

      gtk_window_set_title (window, "CheckButton Example");

  else

      gtk_window_set_title (window, "");

}

static void

activate (GtkApplication *app,

          gpointer        user_data)

{

  GtkWidget *window;

  GtkWidget *checkbutton;

  window = gtk_application_window_new (app);

  gtk_window_set_title (GTK_WINDOW (window), "CheckButton Example");

  gtk_window_set_default_size (GTK_WINDOW (window), 300, 100);

  checkbutton = gtk_check_button_new_with_label ("Show Title");

  gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (checkbutton), TRUE);

  g_signal_connect (GTK_TOGGLE_BUTTON (checkbutton), "toggled", G_CALLBACK (toggled_cb), window);

  gtk_container_add (GTK_CONTAINER (window), checkbutton);

  gtk_widget_show_all (window);

}

int

main (int argc, char **argv)

{

  GtkApplication *app;

  int status;

  app = gtk_application_new ("org.example.checkbutton", 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;

}