btn_cancel->signal_clicked().connect(SigC::slot(*this, &PropertyWnd::on_btn_cancel_clicked));
btn_accept->signal_clicked().connect(SigC::slot(*this, &PropertyWnd::on_btn_accept_clicked));
btn_cancel->signal_clicked().connect(SigC::slot(*this, &PropertyWnd::on_btn_cancel_clicked));
btn_accept->signal_clicked().connect(SigC::slot(*this, &PropertyWnd::on_btn_accept_clicked));