MenuBar.hpp

 
//
// TGUI - Texus' Graphical User Interface
// Copyright (C) 2012-2020 Bruno Van de Velde (vdv_b@tgui.eu)
//
// This software is provided 'as-is', without any express or implied warranty.
// In no event will the authors be held liable for any damages arising from the use of this software.
//
// Permission is granted to anyone to use this software for any purpose,
// including commercial applications, and to alter it and redistribute it freely,
// subject to the following restrictions:
//
// 1. The origin of this software must not be misrepresented;
//    you must not claim that you wrote the original software.
//    If you use this software in a product, an acknowledgment
//    in the product documentation would be appreciated but is not required.
//
// 2. Altered source versions must be plainly marked as such,
//    and must not be misrepresented as being the original software.
//
// 3. This notice may not be removed or altered from any source distribution.
//
 
 
#ifndef TGUI_MENU_BAR_HPP
#define TGUI_MENU_BAR_HPP
 
 
#include <TGUI/Widget.hpp>
#include <TGUI/Renderers/MenuBarRenderer.hpp>
#include <TGUI/Text.hpp>
 
 
namespace tgui
{
    class TGUI_API MenuBar : public Widget
    {
    public:
 
        typedef std::shared_ptr<MenuBar> Ptr; 
        typedef std::shared_ptr<const MenuBar> ConstPtr; 
 
    #ifndef TGUI_REMOVE_DEPRECATED_CODE
        struct GetAllMenusElement
        {
            sf::String text;
            bool enabled;
            std::vector<std::unique_ptr<GetAllMenusElement>> menuItems;
        };
    #endif
 
        struct GetMenuListElement
        {
            sf::String text;
            bool enabled;
            std::vector<GetMenuListElement> menuItems;
        };
 
        struct Menu
        {
            Text text;
            bool enabled = true;
            int selectedMenuItem = -1;
            std::vector<Menu> menuItems;
        };
 
 
        // Default constructor
        MenuBar();
 
 
        static MenuBar::Ptr create();
 
 
        static MenuBar::Ptr copy(MenuBar::ConstPtr menuBar);
 
 
        MenuBarRenderer* getSharedRenderer();
        const MenuBarRenderer* getSharedRenderer() const;
 
        MenuBarRenderer* getRenderer();
        const MenuBarRenderer* getRenderer() const;
 
 
        template <typename Func, typename... Args>
        unsigned int connectMenuItem(const sf::String& menu, const sf::String& menuItem, Func&& handler, const Args&... args)
        {
            return connectMenuItem({menu, menuItem}, std::forward<Func>(handler), args...);
        }
 
 
        template <typename Func, typename... Args>
        unsigned int connectMenuItem(const std::vector<sf::String>& hierarchy, Func&& handler, const Args&... args)
        {
#if defined(__cpp_lib_invoke) && (__cpp_lib_invoke >= 201411L)
            return connect("MenuItemClicked",
                [=](const std::vector<sf::String>& clickedMenuItem)
                {
                    if (clickedMenuItem == hierarchy)
                        std::invoke(handler, args...);
                }
            );
#else
            return connect("MenuItemClicked",
                [f=std::function<void(const Args&...)>(handler),args...,hierarchy](const std::vector<sf::String>& clickedMenuItem)
                {
                    if (clickedMenuItem == hierarchy)
                        f(args...);
                }
            );
#endif
        }
 
 
        void setSize(const Layout2d& size) override;
        using Widget::setSize;
 
 
        void setEnabled(bool enabled) override;
 
 
        void addMenu(const sf::String& text);
 
 
        bool addMenuItem(const sf::String& text);
 
 
        bool addMenuItem(const sf::String& menu, const sf::String& text);
 
 
        bool addMenuItem(const std::vector<sf::String>& hierarchy, bool createParents = true);
 
 
        void removeAllMenus();
 
 
        bool removeMenu(const sf::String& menu);
 
 
        bool removeMenuItem(const sf::String& menu, const sf::String& menuItem);
 
 
        bool removeMenuItem(const std::vector<sf::String>& hierarchy, bool removeParentsWhenEmpty = true);
 
 
        bool removeMenuItems(const sf::String& menu);
 
 
        bool removeSubMenuItems(const std::vector<sf::String>& hierarchy);
 
 
        bool setMenuEnabled(const sf::String& menu, bool enabled);
 
 
        bool getMenuEnabled(const sf::String& menu) const;
 
 
        bool setMenuItemEnabled(const sf::String& menu, const sf::String& menuItem, bool enabled);
 
 
        bool setMenuItemEnabled(const std::vector<sf::String>& hierarchy, bool enabled);
 
 
        bool getMenuItemEnabled(const sf::String& menu, const sf::String& menuItem) const;
 
 
        bool getMenuItemEnabled(const std::vector<sf::String>& hierarchy) const;
 
 
        void setTextSize(unsigned int size) override;
 
 
        void setMinimumSubMenuWidth(float minimumWidth);
 
 
        float getMinimumSubMenuWidth() const;
 
 
        void setInvertedMenuDirection(bool invertDirection);
 
 
        bool getInvertedMenuDirection() const;
 
 
    #ifndef TGUI_REMOVE_DEPRECATED_CODE
        TGUI_DEPRECATED("This function doesn't work with submenus, use getMenuList instead")
        std::vector<std::pair<sf::String, std::vector<sf::String>>> getMenus() const;
 
 
        TGUI_DEPRECATED("This function is deprecated, use getMenuList instead")
        std::vector<std::unique_ptr<GetAllMenusElement>> getAllMenus() const;
    #endif
 
        std::vector<GetMenuListElement> getMenuList() const;
 
 
        void closeMenu();
 
 
        bool mouseOnWidget(Vector2f pos) const override;
 
        void leftMousePressed(Vector2f pos) override;
 
        void leftMouseReleased(Vector2f pos) override;
 
        void mouseMoved(Vector2f pos) override;
 
        void leftMouseButtonNoLongerDown() override;
 
 
    private:
 
        // This function is called when the mouse leaves the widget. If requested, a callback will be send.
        void mouseLeftWidget() override;
 
 
        void draw(sf::RenderTarget& target, sf::RenderStates states) const override;
 
 
    protected:
 
        Signal& getSignal(std::string signalName) override;
 
 
        void rendererChanged(const std::string& property) override;
 
 
        std::unique_ptr<DataIO::Node> save(SavingRenderersMap& renderers) const override;
 
 
        void load(const std::unique_ptr<DataIO::Node>& node, const LoadingRenderersMap& renderers) override;
 
 
        // Makes a copy of the widget
        Widget::Ptr clone() const override
        {
            return std::make_shared<MenuBar>(*this);
        }
 
        void createMenu(std::vector<Menu>& menus, const sf::String& text);
 
        Menu* findMenu(const std::vector<sf::String>& hierarchy, unsigned int parentIndex, std::vector<Menu>& menus, bool createParents);
 
        const Menu* findMenu(const std::vector<sf::String>& hierarchy, unsigned int parentIndex, const std::vector<Menu>& menus) const;
 
        const Menu* findMenuItem(const std::vector<sf::String>& hierarchy) const;
 
        void loadMenus(const std::unique_ptr<DataIO::Node>& node, std::vector<Menu>& menus);
 
        void closeSubMenus(std::vector<Menu>& menus, int& selectedMenu);
 
        void deselectBottomItem();
 
        void updateMenuTextColor(Menu& menu, bool selected);
 
        void updateTextColors(std::vector<Menu>& menus, int selectedMenu);
 
        void updateTextOpacity(std::vector<Menu>& menus);
 
        void updateTextFont(std::vector<Menu>& menus);
 
        float calculateMenuWidth(const Menu& menu) const;
 
        Vector2f calculateSubmenuOffset(const Menu& menu, float globalLeftPos, float menuWidth, float subMenuWidth, bool& openSubMenuToRight) const;
 
        bool isMouseOnTopOfMenu(Vector2f menuPos, Vector2f mousePos, bool openSubMenuToRight, const Menu& menu, float menuWidth) const;
 
        bool findMenuItemBelowMouse(Vector2f menuPos, Vector2f mousePos, bool openSubMenuToRight, Menu& menu, float menuWidth, Menu** resultMenu, int* resultSelectedMenuItem);
 
        void drawMenusOnBar(sf::RenderTarget& target, sf::RenderStates states, Sprite& backgroundSprite) const;
 
        void drawMenu(sf::RenderTarget& target, sf::RenderStates states, const Menu& menu, float menuWidth, Sprite& backgroundSprite, float globalLeftPos, bool openSubMenuToRight) const;
 
 
    public:
 
        SignalItemHierarchy onMenuItemClick = {"MenuItemClicked"};
 
 
    protected:
 
        std::vector<Menu> m_menus;
 
        int m_visibleMenu = -1;
 
        float m_minimumSubMenuWidth = 125;
 
        bool m_invertedMenuDirection = false;
 
        Sprite m_spriteBackground;
        Sprite m_spriteItemBackground;
        Sprite m_spriteSelectedItemBackground;
 
        // Cached renderer properties
        Color m_backgroundColorCached;
        Color m_selectedBackgroundColorCached;
        Color m_textColorCached;
        Color m_selectedTextColorCached;
        Color m_textColorDisabledCached;
        float m_distanceToSideCached = 0;
 
    };
 
}
 
 
 
#endif // TGUI_MENU_BAR_HPP