c++ - 如何在nana gui c ++的列表框中保存选定/选中的项目

Question

int main()
{
    using namespace nana;

    form fm;
    listbox lb(fm, nana::rectangle(10, 10, 280, 120));

    auto cat = lb.at(0);
    if (cat.begin() == cat.end())
        std::wcout <<  ("true ");
    else        
        std::wcout <<  ("false ");

    std::wcout << "\n";

    lb.append_header( ("Name"), 100);
    lb.append_header( ("Gender"), 60);
    lb.append_header( ("Age"), 60);

    //lb.resolver(resolver()); //Pass the user defined resolver to the listbox

    person pr;
    pr.name =  ("Peter");
    pr.gender = true;
    pr.age = 10;
    lb.at(0).append (pr); //person to item. resolver::decode() is required

    person prr;
    lb.at(0).at(0).resolve_to( prr); //item to person. resolver::encode() is required
    std::cout << pr << "\n";
    std::cout << prr << "\n";
    fm.show();
    exec();
}

我正在尝试在列表中检查数据 我尝试了 selected()/checked() 函数，但我不确定如何使用它们，因为我对此了解不多

这是 Nanapro gui 库，带有 c++14