BackendGuiSDL.hpp

 
//
// TGUI - Texus' Graphical User Interface
// Copyright (C) 2012-2023 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_BACKEND_GUI_SDL_HPP
#define TGUI_BACKEND_GUI_SDL_HPP
 
#include <TGUI/extlibs/IncludeSDL.hpp>
#if SDL_MAJOR_VERSION < 3
 #include <SDL_touch.h>
#endif
 
#include <TGUI/Config.hpp>
#if TGUI_BUILD_AS_CXX_MODULE
 import tgui;
#else
 #include <TGUI/Backend/Window/BackendGui.hpp>
#endif
 
 
TGUI_MODULE_EXPORT namespace tgui
{
 
 class TGUI_API BackendGuiSDL : public BackendGui
 {
 public:
 
 BackendGuiSDL() = default;
 
 
 bool handleEvent(const SDL_Event& event);
 using BackendGui::handleEvent;
 
 
 void mainLoop(Color clearColor = {240, 240, 240}) override;
 
 
 TGUI_NODISCARD bool convertEvent(const SDL_Event& eventSDL, Event& eventTGUI);
 
 
 SDL_Window* getWindow() const;
 
 
 protected:
 
 void setGuiWindow(SDL_Window* window);
 
 
 // Updates the view and changes the size of the root container when needed
 void updateContainerSize() override;
 
 
 protected:
 
 virtual void presentScreen() = 0;
 
#if ((SDL_MAJOR_VERSION == 2) && (SDL_MINOR_VERSION < 26))
 virtual void updateFramebufferSize() = 0;
#endif
 
 protected:
 
 SDL_Window* m_window = nullptr;
 float m_dpiScale = 1;
 
 bool m_touchFirstFingerDown = false;
 SDL_FingerID m_touchFirstFingerId = 0; // Only valid if m_touchFirstFingerDown is true
 SDL_TouchID m_touchFirstFingerTouchId = 0; // Only valid if m_touchFirstFingerDown is true
 
 };
}
 
 
#endif // TGUI_BACKEND_GUI_SDL_HPP