NativeMenuBar.h

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// Copyright 2025 Dave R. Smith
// SPDX-License-Identifier: PolyForm-Noncommercial-1.0.0
 
#pragma once
 
#include <Malena/Core/malena_export.h>
#include <functional>
#include <memory>
#include <string>
#include <vector>
 
namespace ml
{
    class MALENA_API NativeMenuBar
    {
    public:
        struct Item
        {
            enum class Type { Action, Separator };
            Type                  type;
            std::string           label;
            std::function<void()> action;
        };
 
        class MALENA_API Menu
        {
        public:
            Menu& addItem(const std::string& label, std::function<void()> action);

            Menu& addSeparator();
 
            const std::string&        getLabel() const { return _label; }
            const std::vector<Item>&  getItems() const { return _items; }
 
        private:
            friend class NativeMenuBar;
            explicit Menu(std::string label);
            std::string        _label;
            std::vector<Item>  _items;
        };
 
        NativeMenuBar() = default;
        ~NativeMenuBar();
 
        NativeMenuBar(const NativeMenuBar&)            = delete;
        NativeMenuBar& operator=(const NativeMenuBar&) = delete;

        Menu& addMenu(const std::string& label);

        void attach();

        void detach();
 
    private:
        std::vector<std::unique_ptr<Menu>> _menus;
        void* _nativeHandle = nullptr; 
        void* _targetList   = nullptr; 
    };
 
} // namespace ml