Method PopupMenuBuilder

src/widgets/PopupMenuTable.cpp:55–115

class PopupMenuBuilder : public MenuRegistry::Visitor<PopupMenuTableTraits> {
public:
   PopupMenuBuilder(PopupMenuTable &table, PopupMenuImpl &menu, void *pUserData)
   : MenuRegistry::Visitor<PopupMenuTableTraits>{ std::tuple{
      [this](const PopupSubMenu &item, const auto &){
         if (!item.caption.empty()) {
            auto newMenu =
               std::make_unique<PopupMenuImpl>(mMenu->pUserData);
            mMenu = newMenu.get();
            mMenus.push_back(std::move(newMenu));
         }
      },

      [this](const PopupMenuTableEntry &entry, const auto &){
         switch (entry.type) {
            case PopupMenuTable::Entry::Item:
            {
               mMenu->Append(entry.id, entry.caption.Translation());
               break;
            }
            case PopupMenuTable::Entry::RadioItem:
            {
               mMenu->AppendRadioItem(entry.id, entry.caption.Translation());
               break;
            }
            case PopupMenuTable::Entry::CheckItem:
            {
               mMenu->AppendCheckItem(entry.id, entry.caption.Translation());
               break;
            }
            default:
               assert(false);
               break;
         }

         // This call is necessary for externally registered items, else
         // harmlessly redundant
         entry.handler.InitUserData(mpUserData);

         if (entry.init)
            entry.init(entry.handler, *mMenu, entry.id);

         mMenu->Bind(
            wxEVT_COMMAND_MENU_SELECTED, entry.func, &entry.handler, entry.id);
      },

      [this](const PopupSubMenu &item, const auto &){
         if (!item.caption.empty()) {
            auto subMenu = std::move(mMenus.back());
            mMenus.pop_back();
            mMenu = mMenus.empty() ? mRoot : mMenus.back().get();
            mMenu->AppendSubMenu(subMenu.release(), item.caption.Translation());
         }
      }},

      [this]() {
         mMenu->AppendSeparator();
      }
   }
   , mMenu{ &menu }