window_context_manager.hpp

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#ifndef FOOLSENGINE_WINDOWCONTEXT_H
#define FOOLSENGINE_WINDOWCONTEXT_H
 
#include <memory>
 
#include <SDL2/SDL.h>
#include <GL/glew.h>
 
#include <assimp/Importer.hpp>
 
#include <nlohmann/json.hpp>
#include <glm/glm.hpp>
 
#include "signals.hpp"
 
namespace ToyMaker {

    class WindowContext {
        SignalTracker mSignalTracker {};
    public:
        /* Deletes SDL and GL contexts */
        ~WindowContext();

        static WindowContext& getInstance();
 
        WindowContext() = delete;

        SDL_GLContext getGLContext() const;
        SDL_Window* getSDLWindow() const;
        Assimp::Importer* getAssetImporter() const;

        void handleWindowEvent(const SDL_WindowEvent& windowEvent);

        static WindowContext& initialize(const nlohmann::json& initialWindowConfiguration);

        static void clear();

        void swapBuffers();

        const std::string& getTitle() const;

        bool isMaximized() const;

        bool isMinimized() const;

        bool isResizable() const;

        bool isHidden() const;

        bool isShown() const;

        bool hasKeyFocus() const;

        bool hasMouseFocus() const;

        bool hasCapturedMouse() const;

        bool isFullscreen() const;

        bool isExclusiveFullscreen() const;

        bool isBorderless() const;

        int getDisplayID() const;

        const glm::ivec2 getPosition() const;

        const glm::uvec2 getDimensions() const;

        const glm::uvec2 getDimensionsMinimum() const;
        const glm::uvec2 getDimensionsMaximum() const;

        void setPosition(const glm::uvec2& position);

        void setDimensions(const glm::uvec2& dimensions);

        void setResizeAllowed(bool allowed);

        void setBorder(bool state);

        void setHidden(bool hide);

        void setTitle(const std::string& newTitle);

        void setDimensionsMinimum(const glm::uvec2& dimensions);

        void setDimensionsMaximum(const glm::uvec2& dimensions);

        void setFullscreen(bool fullscreen, bool exclusive=false);

        void maximize();

        void minimize();

        void restore();

        Signal<> mSigWindowResized { mSignalTracker, "WindowResized" };

        Signal<> mSigWindowMaximized { mSignalTracker, "WindowMaximized" };

        Signal<> mSigWindowMinimized { mSignalTracker, "WindowMinimized" };

        Signal<> mSigWindowMoved { mSignalTracker, "WindowMoved" };

        Signal<> mSigWindowMouseEntered { mSignalTracker, "WindowMouseEntered" };

        Signal<> mSigWindowMouseExited { mSignalTracker, "WindowMouseExited" };

        Signal<> mSigWindowShown { mSignalTracker, "WindowShown" };

        Signal<> mSigWindowHidden { mSignalTracker, "WindowHidden" };

        Signal<> mSigWindowExposed { mSignalTracker, "WindowExposed" };

        Signal<> mSigWindowSizeChanged { mSignalTracker, "WindowSizeChanged" };

        Signal<> mSigWindowRestored { mSignalTracker, "WindowRestored" };

        Signal<> mSigWindowKeyFocusGained { mSignalTracker, "WindowKeyFocusGained" };

        Signal<> mSigWindowKeyFocusLost { mSignalTracker, "WindowKeyFocusLost" };

        Signal<> mSigWindowCloseRequested { mSignalTracker, "WindowClosed" };

        Signal<> mSigWindowKeyFocusOffered { mSignalTracker, "WindowKeyFocusOffered" };

        Signal<> mSigWindowICCProfileChanged { mSignalTracker, "WindowICCProfileChanged" };

        Signal<> mSigWindowDisplayChanged { mSignalTracker, "WindowDisplayChanged" };
 
    private:
        void refreshWindowProperties();

        WindowContext(const nlohmann::json& initialWindowConfiguration);
 
        // non copyable
        WindowContext(const WindowContext& other) = delete;
        // non moveable
        WindowContext(WindowContext&& other) = delete;
        // non copy-assignable
        WindowContext& operator=(const WindowContext& other) = delete;
        // non move-assignable
        WindowContext& operator=(WindowContext&& other) = delete;

        SDL_Window* mpSDLWindow;

        SDL_GLContext mpGLContext;

        Assimp::Importer* mpAssetImporter;

        SDL_WindowFlags mCachedWindowFlags {};

        glm::i16vec2 mCachedWindowPosition {};

        glm::u16vec2 mCachedWindowDimensions {};

        glm::u16vec2 mCachedWindowMinimumDimensions {};

        glm::u16vec2 mCachedWindowMaximumDimensions {};

        int mCachedDisplayID {0};

        std::string mCachedTitle {};

        inline static std::unique_ptr<WindowContext> s_windowContextManager { nullptr };
    };
}
 
#endif