Preview of Listbox Model

The listbox model is a new feature which will be introduced into Nana 1.4. The listbox model is to use an existing STL container and adopt the container as the storage for a listbox category.

//Definition of a person
struct person
{
    std::string name;
    unsigned age;
    bool gender;
};

//A container stores persons
std::vector<person> persons;

//Insert 3 persons.
persons.push_back(person{"Steve", 20, true});
persons.push_back(person{"Nolan", 25, true});
persons.push_back(person{"Susan", 21, false});


//A listbox to list persons
nana::listbox lsbox(form, nana::rectangle{10, 10, 300, 200});

lsbox.append_header("name");
lsbox.append_header("age");
lsbox.append_header("gender");

//We have a container and a listbox.
//Now we need to defines two function to make the listbox 'recognize'
//the struct person.

auto value_translator = [](const std::vector<nana::listbox::cell>& cells)
{
    person p;
    p.name = cells[0].text;
    p.age = std::stoul(cells[1].text);
    p.gender = (cells[2].text == "male");
    return p;
};

auto cell_translator = [](const person& p)
{
    std::vector<nana::listbox::cell> cells;
    cells.emplace_back(p.name);
    cells.emplace_back(std::to_string(p.age));
    cells.emplace_back(p.gender ? "male" : "female");
    return cells;
};

//Everything is ready but last step
lsbox.at(0).model<std::recursive_mutex>(persons, value_translator, cell_translator);

The listbox displays container elements.

Two kinds of model

listbox defines 2 different model types.
1, Standalone model

2, Shared model