start.cpp

#include "C_App.hpp"
#include <gtkmm/application.h>

//////////////////////////////////////////////////////////////////////////////////
// [ on_command_line ]
//////////////////////////////////////////////////////////////////////////////////
namespace{
   int on_command_line(const Glib::RefPtr<Gio::ApplicationCommandLine>& command_line,
                    Glib::RefPtr<Gtk::Application>& app){

      app->activate(); // Without activate() the window won't be shown.
      return(EXIT_SUCCESS);
   }
} // anonymous namespace
//////////////////////////////////////////////////////////////////////////////////
// [ main ]
//////////////////////////////////////////////////////////////////////////////////
int main(int argc, char *argv[]){
  
   auto app = Gtk::Application::create(argc, argv, "org.gtkmm.dns-proxy", 
                                       Gio::APPLICATION_HANDLES_COMMAND_LINE | 
                                       Gio::APPLICATION_NON_UNIQUE);

   app->signal_command_line().connect(sigc::bind(sigc::ptr_fun(&on_command_line), app), false);
   
   C_App CApp(argc, argv);

   //Shows the window and returns when it is closed.
   return(app->run(CApp));
}