std::cout << "$$$$ main : user clicked 'OK' $$$$"<<std::endl;
std::cout << "$$$$ selected files : "<<std::endl;
std::vector<std::string> s;
std::cout << "$$$$ main : user clicked 'OK' $$$$"<<std::endl;
std::cout << "$$$$ selected files : "<<std::endl;
std::vector<std::string> s;