Menu.h

#pragma once
 
#include "Alignment.h"
#include "Event.h"
#include "MenuItem.h"
#include "Point.h"
 
namespace sw
{
    class MenuBase; // 向前声明
 
    class MenuItemClickedEventArgs : public EventArgs
    {
    public:
        MenuBase *menu;
    };
 
    using MenuItemClickedEventHandler =
        EventHandler<MenuItem, MenuItemClickedEventArgs>;
 
    class MenuBase
    {
    private:
        std::unique_ptr<MenuItem> _root;
 
        MenuItemClickedEventHandler _itemClicked;
 
    public:
        const Event<MenuItemClickedEventHandler> ItemClicked;
 
        const ReadOnlyProperty<MenuItem *> Root;
 
        const ReadOnlyProperty<HMENU> Handle;
 
    protected:
        MenuBase(MenuItem *root);
 
    public:
        virtual ~MenuBase() = default;
 
        // 删除拷贝构造函数
        MenuBase(const MenuBase &) = delete;
 
        // 删除移动构造函数
        MenuBase(MenuBase &&) = delete;
 
        // 删除拷贝赋值运算符
        MenuBase &operator=(const MenuBase &) = delete;
 
        // 删除移动赋值运算符
        MenuBase &operator=(MenuBase &&) = delete;
 
    public:
        bool RaiseClickedEvent(int menuItemId);
 
        MenuItem *FindMenuItemById(int id);
 
        MenuItem *FindMenuItemByTag(uint64_t tag);
 
        MenuItem *FindMenuItemByText(const std::wstring &text);
    };
 
    class Menu : public MenuBase
    {
    public:
        Menu();
 
        Menu(std::initializer_list<MenuItemDesc> items);
    };
 
    class ContextMenu : public MenuBase
    {
    public:
        ContextMenu();
 
        ContextMenu(std::initializer_list<MenuItemDesc> items);
 
        bool Show(
            HWND hwnd, const Point &point,
            sw::HorizontalAlignment horz = sw::HorizontalAlignment::Left,
            sw::VerticalAlignment vert   = sw::VerticalAlignment::Top);
    };
}