OpenSpace/include/openspace/rendering/loadingscreen.h

/*****************************************************************************************
 *                                                                                       *
 * OpenSpace                                                                             *
 *                                                                                       *
 * Copyright (c) 2014-2017                                                               *
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 * Permission is hereby granted, free of charge, to any person obtaining a copy of this  *
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 * without restriction, including without limitation the rights to use, copy, modify,    *
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 * or substantial portions of the Software.                                              *
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#ifndef __OPENSPACE_CORE___LOADINGSCREEN___H__
#define __OPENSPACE_CORE___LOADINGSCREEN___H__

#include <ghoul/glm.h>
#include <ghoul/opengl/ghoul_gl.h>

#include <memory>
#include <mutex>
#include <random>

namespace ghoul::fontrendering {
    class Font;
} // namespace ghoul::fontrendering

namespace ghoul::opengl {
    class ProgramObject;
    class Texture; 
} // namespace ghoul::opengl

namespace openspace {

class LoadingScreen {
public:
    LoadingScreen();
    ~LoadingScreen();

    void render();

    void postMessage(std::string message);


    enum class ItemStatus {
        Started,
        Initializing,
        Finished
    };

    void updateItem(const std::string& itemName, ItemStatus newStatus);



private:
    std::unique_ptr<ghoul::opengl::ProgramObject> _program;
    std::unique_ptr<ghoul::opengl::Texture> _logoTexture;

    std::shared_ptr<ghoul::fontrendering::Font> _loadingFont;
    std::shared_ptr<ghoul::fontrendering::Font> _messageFont;
    std::shared_ptr<ghoul::fontrendering::Font> _itemFont;

    struct {
        GLuint vao;
        GLuint vbo;
    } _logo;

    std::string _message;
    std::mutex _messageMutex;


    struct Item {
        std::string name;
        ItemStatus status;
        bool hasLocation;
        glm::vec2 ll;
        glm::vec2 ur;
        std::chrono::system_clock::time_point finishedTime;
    };
    std::vector<Item> _items;
    std::mutex _itemsMutex;

    std::random_device _randomDevice;
    std::default_random_engine _randomEngine;
};

} // namespace openspace

#endif // __OPENSPACE_CORE___LOADINGSCREEN___H__