MultiSelector.hh

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#ifndef __NCPP_MULTI_SELECTOR_HH
#define __NCPP_MULTI_SELECTOR_HH
 
#include <notcurses/notcurses.h>
 
#include "NCAlign.hh"
#include "Plane.hh"
#include "Utilities.hh"
#include "Widget.hh"
 
namespace ncpp
{
    class NCPP_API_EXPORT MultiSelector : public Widget
    {
    public:
        static ncmultiselector_options default_options;
 
    public:
        explicit MultiSelector (Plane *plane, const ncmultiselector_options *opts = nullptr)
            : Widget (Utilities::get_notcurses_cpp (plane))
        {
            ensure_valid_plane (plane);
            common_init (Utilities::to_ncplane (plane), opts);
            take_plane_ownership (plane);
        }
 
        explicit MultiSelector (Plane &plane, const ncmultiselector_options *opts = nullptr)
            : Widget (Utilities::get_notcurses_cpp (plane))
        {
            ensure_valid_plane (plane);
            common_init (Utilities::to_ncplane (plane), opts);
            take_plane_ownership (plane);
        }
 
        ~MultiSelector ()
        {
            if (!is_notcurses_stopped ())
                ncmultiselector_destroy (multiselector);
        }
 
        bool offer_input (const struct ncinput *ni) const noexcept
        {
            return ncmultiselector_offer_input (multiselector, ni);
        }
 
        int get_selected (bool *selected, unsigned count) const NOEXCEPT_MAYBE
        {
            return error_guard<int> (ncmultiselector_selected (multiselector, selected, count), -1);
        }
 
        Plane* get_plane () const noexcept;
 
    private:
        void common_init (ncplane *plane, const ncmultiselector_options *opts)
        {
            if (plane == nullptr)
                throw invalid_argument ("'plane' must be a valid pointer");
 
            multiselector = ncmultiselector_create (plane, opts == nullptr ? &default_options : opts);
            if (multiselector == nullptr)
                throw init_error ("Notcurses failed to create a new multiselector");
        }
 
    private:
        ncmultiselector *multiselector;
    };
}
#endif