MenuBar.hpp

 
//
// TGUI - Texus' Graphical User Interface
// Copyright (C) 2012-2022 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/CopiedSharedPtr.hpp>
#include <TGUI/Text.hpp>
 
 
namespace tgui
{
 class MenuBarMenuPlaceholder;
 
 
 class TGUI_API MenuBar : public Widget
 {
 public:
 
 using Ptr = std::shared_ptr<MenuBar>; 
 using ConstPtr = std::shared_ptr<const MenuBar>; 
 
 static constexpr const char StaticWidgetType[] = "MenuBar"; 
 
 
 struct GetMenusElement
 {
 String text;
 bool enabled;
 std::vector<GetMenusElement> menuItems;
 };
 
 struct Menu
 {
 Text text;
 bool enabled = true;
 int selectedMenuItem = -1;
 std::vector<Menu> menuItems;
 };
 
 
 MenuBar(const char* typeName = StaticWidgetType, bool initRenderer = true);
 
 
 // Copy constructor
 MenuBar(const MenuBar& other);
 
 // Move constructor
 MenuBar(MenuBar&& other) noexcept;
 
 // Copy assignment operator
 MenuBar& operator=(const MenuBar& other);
 
 // Move assignment operator
 MenuBar& operator=(MenuBar&& other) noexcept;
 
 
 static MenuBar::Ptr create();
 
 
 static MenuBar::Ptr copy(const MenuBar::ConstPtr& menuBar);
 
 
 MenuBarRenderer* getSharedRenderer();
 const MenuBarRenderer* getSharedRenderer() const;
 
 MenuBarRenderer* getRenderer();
 
 
 template <typename Func, typename... Args>
 unsigned int connectMenuItem(const String& menu, const 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<String>& hierarchy, Func&& handler, const Args&... args)
 {
#if defined(__cpp_lib_invoke) && (__cpp_lib_invoke >= 201411L)
 return onMenuItemClick.connect(
 [=](const std::vector<String>& clickedMenuItem)
 {
 if (clickedMenuItem == hierarchy)
 std::invoke(handler, args...);
 }
 );
#else
 return onMenuItemClick.connect(
 [f=std::function<void(const Args&...)>(handler),args...,hierarchy](const std::vector<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 String& text);
 
 
 bool addMenuItem(const String& text);
 
 
 bool addMenuItem(const String& menu, const String& text);
 
 
 bool addMenuItem(const std::vector<String>& hierarchy, bool createParents = true);
 
 
 bool changeMenuItem(const std::vector<String>& hierarchy, const String& text);
 
 
 void removeAllMenus();
 
 
 bool removeMenu(const String& menu);
 
 
 bool removeMenuItem(const String& menu, const String& menuItem);
 
 
 bool removeMenuItem(const std::vector<String>& hierarchy, bool removeParentsWhenEmpty = true);
 
 
 bool removeMenuItems(const String& menu);
 
 
 bool removeSubMenuItems(const std::vector<String>& hierarchy);
 
 
 bool setMenuEnabled(const String& menu, bool enabled);
 
 
 bool getMenuEnabled(const String& menu) const;
 
 
 bool setMenuItemEnabled(const String& menu, const String& menuItem, bool enabled);
 
 
 bool setMenuItemEnabled(const std::vector<String>& hierarchy, bool enabled);
 
 
 bool getMenuItemEnabled(const String& menu, const String& menuItem) const;
 
 
 bool getMenuItemEnabled(const std::vector<String>& hierarchy) const;
 
 
 void setMinimumSubMenuWidth(float minimumWidth);
 
 
 float getMinimumSubMenuWidth() const;
 
 
 void setInvertedMenuDirection(bool invertDirection);
 
 
 bool getInvertedMenuDirection() const;
 
 
 std::vector<GetMenusElement> getMenus() const;
 
 
 void closeMenu();
 
 
 bool isMouseOnWidget(Vector2f pos) const override;
 
 void leftMousePressed(Vector2f pos) override;
 
 void leftMouseReleased(Vector2f pos) override;
 
 void mouseMoved(Vector2f pos) override;
 
 
 void draw(BackendRenderTarget& target, RenderStates states) const override;
 
 
 protected:
 
 Signal& getSignal(String signalName) override;
 
 
 void rendererChanged(const 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;
 
 
 void updateTextSize() override;
 
 
 // Makes a copy of the widget
 Widget::Ptr clone() const override;
 
 
 void openMenu(std::size_t menuIndex);
 
 
 void createMenu(std::vector<Menu>& menus, const String& text);
 
 Menu* findMenu(const std::vector<String>& hierarchy, unsigned int parentIndex, std::vector<Menu>& menus, bool createParents);
 
 const Menu* findMenu(const std::vector<String>& hierarchy, unsigned int parentIndex, const std::vector<Menu>& menus) const;
 
 Menu* findMenuItem(const std::vector<String>& hierarchy);
 
 const Menu* findMenuItem(const std::vector<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;
 
 float getMenuItemHeight(const Menu& menuItem) const;
 
 float calculateOpenMenuHeight(const std::vector<Menu>& menuItems) 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, std::size_t* resultSelectedMenuItem);
 
 void drawMenusOnBar(BackendRenderTarget& target, RenderStates states) const;
 
 void drawMenu(BackendRenderTarget& target, RenderStates states, const Menu& menu, float menuWidth, float globalLeftPos, bool openSubMenuToRight) const;
 
 
 bool isMouseOnOpenMenu(Vector2f pos) const;
 
 void leftMouseReleasedOnMenu();
 
 void mouseMovedOnMenu(Vector2f pos);
 
 void drawOpenMenu(BackendRenderTarget& target, RenderStates states) const;
 
 
 public:
 
 SignalItemHierarchy onMenuItemClick = {"MenuItemClicked"};
 
 
 protected:
 
 std::vector<Menu> m_menus;
 std::shared_ptr<MenuBarMenuPlaceholder> m_menuWidgetPlaceholder;
 
 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;
 Color m_separatorColorCached = Color::Black;
 float m_separatorThicknessCached = 1;
 float m_separatorVerticalPaddingCached = 0;
 float m_separatorSidePaddingCached = 0;
 float m_distanceToSideCached = 0;
 
 
 friend class MenuBarMenuPlaceholder;
 };
 
 
 class MenuBarMenuPlaceholder : public Widget
 {
 public:
 
 // Instances of this class can't be copied
 MenuBarMenuPlaceholder(const MenuBarMenuPlaceholder&) = delete;
 MenuBarMenuPlaceholder& operator=(const MenuBarMenuPlaceholder&) = delete;
 
 
 MenuBarMenuPlaceholder(MenuBar* menuBar);
 
 
 Vector2f getFullSize() const override;
 
 
 Vector2f getWidgetOffset() const override;
 
 
 bool isMouseOnWidget(Vector2f pos) const override;
 
 
 void draw(BackendRenderTarget& target, RenderStates states) const override;
 
 
 void leftMouseButtonNoLongerDown() override;
 
 void mouseMoved(Vector2f pos) override;
 
 
 // Makes a copy of the widget
 Widget::Ptr clone() const override;
 
 
 private:
 MenuBar* m_menuBar;
 bool m_mouseWasOnMenuBar = true; // When a menu opens then the mouse will be on top of the menu bar
 };
 
}
 
 
 
#endif // TGUI_MENU_BAR_HPP