src/option.hpp

   1 #ifndef MENUPP_OPTION_HPP_
   2 #define MENUPP_OPTION_HPP_
   3
   4 #include "node.hpp"
   5
   6 #include <ostream>
   7 #include <iterator>
   8
   9 namespace Menu
  10 {
  11
  12     template<typename F>
  13     class Option: public INode
  14     {
  15         NodeId _id;
  16         const char* _label;
  17         F _f;
  18
  19     public:
  20         explicit Option(const char* label, F f)
  21         : _label(label), _f(f) {}
  22
  23         NodeId id() const override { return _id; }
  24
  25         void set_id(NodeId id) override { _id = id; }
  26
  27         void dump(std::ostream& os, size_t indent, size_t total_indent) const override
  28         {
  29             (void) indent;
  30             std::fill_n(std::ostream_iterator<char>(os), total_indent, ' ');
  31             os << "Option" << _id << ": \"" << label() << "\"\n";
  32         }
  33
  34         NodeId move(Move m) override
  35         {
  36             switch (m) {
  37                 case Move::Into:
  38                     _f();
  39                     return _id.parent();
  40                 case Move::Up:
  41                 case Move::Down:
  42                 case Move::Left:
  43                 case Move::Right:
  44                     return NodeId();
  45             }
  46             return NodeId();
  47         }
  48
  49         INode* get(size_t) override { return nullptr; }
  50
  51         const char* label() const override { return _label; }
  52     };
  53
  54 }
  55
  56 #endif // MENUPP_OPTION_HPP_