Ejemplo de «Plugs» y «Sockets».

#include <iostream>
#include <fstream>
#include <gtkmm.h>
#include <gtkmm/socket.h>

using namespace std;

const char* id_filename = "plug.id";

void plug_added()
{
  cout << "A plug was added" << endl;
}

bool plug_removed()
{
  cout << "A Plug was removed" << endl;
  return true;
}

class MySocketWindow : public Gtk::Window
{
  public:
    MySocketWindow()
    {
      ifstream infile(id_filename);
      if (infile)
      {
        Gtk::Socket* socket = Gtk::manage(new Gtk::Socket());
        add(*socket);
        socket->signal_plug_added().connect(sigc::ptr_fun(plug_added));
        socket->signal_plug_removed().connect(sigc::ptr_fun(plug_removed));
        ::Window plug_id = 0;
        infile >> plug_id;
        infile.close();
        socket->add_id(plug_id);
      }
      else
      {
        Gtk::Label* label = Gtk::manage(
            new Gtk::Label(
              "Plug id file not found.\n Make sure plug is running."));
        add(*label);
        set_size_request(150, 50);
      }
      show_all();
    }
};

int main(int argc, char** argv)
{
  Glib::RefPtr<Gtk::Application> app = Gtk::Application::create(argc, argv, "org.gtkmm.example");
  MySocketWindow win;
  app->run(win);
  return 0;
}

#include <iostream>
#include <fstream>
#include <gtkmm.h>
#include <gtkmm/plug.h>
#include <glib/gstdio.h>

using namespace std;

const char* id_filename = "plug.id";

void on_embed()
{
  cout << "I've been embedded." << endl;
}

class MyPlug : public Gtk::Plug
{
  public:
    MyPlug() :
      m_label("I am the plug")
  {
    set_size_request(150, 100);
    add(m_label);
    signal_embedded().connect(sigc::ptr_fun(on_embed));
    show_all_children();
  }

  private:
    Gtk::Label m_label;
};


int main(int argc, char** argv)
{
  Glib::RefPtr<Gtk::Application> app = Gtk::Application::create(argc, argv, "org.gtkmm.example");
  MyPlug plug;
  plug.show();

  ofstream out(id_filename);
  out << plug.get_id();
  out.close();
  cout << "The window ID is: " << plug.get_id() << endl;

  app->run(plug);

  // remove the ID file when the program exits
  g_remove(id_filename);
  return 0;
}