gui_menu_manager.h

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#pragma once
 
#include <string>
 
#include <gui_core/input/gui_input_handler_func.h>
 
#include <gui_core/gui_id.h>
#include <gui_core/gui_base_types.h>
 
#include <functional>
#include <unordered_map>
#include <vector>
 
namespace tachyon
{
 
    class ElementStorage;
    class GUIStateManager;
    class InputManager;
    class IDManager;
    class OSWindowManager;
    class ScrollManagement;

    class MenuManager
    {
    public:
        static constexpr int kMaxDepth = 8;   

        struct Level
        {
            int     depth          = -1;   
            ID      windowID       = ID::Invalid();
            ID      triggerID      = ID::Invalid();
            ID      activeItemID   = ID::Invalid(); 
            ID      scrollUpID     = ID::Invalid(); 
            ID      scrollDownID   = ID::Invalid();
            bool    canScrollUp    = false; 
            bool    canScrollDown  = false; 
            bool    isOpen         = false;
            bool    reopened       = false; 
            bool    reserveIconColumn = false;
            bool    itemsHaveIcons    = false; 
            std::string filter;                
            bool    filtering         = false;
        };
 
        Level levels[kMaxDepth];
        int   currentDepth       = -1;
        int   maxOpenDepth       = -1;
        bool  requestCloseAll    = false;
        ID    justClosedTriggerID = ID::Invalid();
        ID    priorFocusID       = ID::Invalid(); 

        int   suppressedSubmenuTriggerDepth = -1;

        bool  skipActivityCheck  = false;
 
        bool  mouseHiddenForMenu = false;         
        int2  lastMousePos       = {0, 0};        
        bool  focusSubmenuOnOpen = false;          
        bool  navigatedThisFrame = false;          

        std::unordered_map<ID, bool> menuItemsHaveIcons;

        std::unordered_map<ID, ID> popupWindowIDs;
        ID PopupWindowFor(ID triggerID, IDManager& idManager);
 
        bool              buildingMenuBar = false;   
        std::vector<ID>   menuBarTriggers;

        bool IsMenuBarTrigger(ID id) const;
 
 

        Level& GetOrCreateNextLevel(IDManager& idManager);
 

        void BeginFrame(GUIStateManager& guiStateManager, OSWindowManager& windowManager);
        void EndFrame(ElementStorage& elementStorage, GUIStateManager& guiStateManager);

        void CloseFromDepth(int fromDepth);

        bool IsOpen() const { return levels[0].isOpen; }

        bool IsBalanced() const { return currentDepth == -1; }

        void RequestCloseAll();

        void CloseOnInputOutside(const InputManager& inputManager, const ElementStorage& elementStorage,
                                 GUIStateManager& guiStateManager);

        void PrepareLevelWindow(Level& level, ScrollManagement& scrollManagement);
        void OpenSubmenu(int parentDepth, ID triggerID);

        void CloseAll(GUIStateManager& guiStateManager);

        void CloseAll(GUIStateManager& guiStateManager, OSWindowManager& windowManager);

        void ToggleOrOpenMenu(GUIStateManager& guiStateManager, ID id, bool focusIntoMenu = true);
        void OpenMenu(GUIStateManager& guiStateManager, ID id, bool focusIntoMenu = true);

        bool ClickMenu(GUIStateManager& guiStateManager, bool isSubmenu, int depth, ID currentItemID, std::function<void()> onClick);

        bool NavigateMenuSibling(GUIStateManager& guiStateManager, ElementStorage& elementStorage, bool isSubmenu, int depth, ID currentItemID, KeyCode key);

        bool NavigateMenuBar(GUIStateManager& guiStateManager, ID currentTriggerID, KeyCode key);

        void EnterMenuFromTrigger(GUIStateManager& guiStateManager, ID triggerID);
    };

    EventHandler MakeMenuItemHandler(IDManager& idManager,
                                     GUIStateManager& guiStateManager,
                                     ElementStorage& elementStorage,
                                     MenuManager& menuManager,
                                     int depth,
                                     std::function<void()> onClick);

    EventHandler MakeSubmenuTriggerHandler(IDManager& idManager,
                                           GUIStateManager& guiStateManager,
                                           ElementStorage& elementStorage,
                                           MenuManager& menuManager,
                                           int depth);

} // namespace tachyon