ui_system.h

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#pragma once
 
#include <engine/engine_export.h>
#include <base/basetypes.hpp>
#include <context/context.hpp>
#include <ospp/event.h>
#include <hpp/utility.hpp>
 
#include <string>
#include <entt/entt.hpp>
#include <graphics/frame_buffer.h>
 
// Forward declarations
namespace Rml
{
    class Context;
    class ElementDocument;
    class Element;
}
 
namespace unravel
{
    struct ui_document_component;
 
struct ui_system
{
    static void on_create_component(entt::registry& r, entt::entity e);
    static void on_destroy_component(entt::registry& r, entt::entity e);
 
    auto init(rtti::context& ctx) -> bool;
 
    auto deinit(rtti::context& ctx) -> bool;
 
    void on_frame_update(rtti::context& ctx, delta_t dt);
 
    void on_frame_render(const gfx::frame_buffer::ptr& output, delta_t dt);
 
    auto get_context() -> Rml::Context*;
 
 
    void on_os_event(rtti::context& ctx, os::event& event);
 
    void load_fonts();
    
    void register_component_callbacks(rtti::context& ctx);
 
private:
    void update_ui_document_components(rtti::context& ctx);
    
    auto load_ui_document(ui_document_component& component) -> bool;
 
 
 
    auto is_root_element(rtti::context& ctx, Rml::Element* element) -> bool;
    
    Rml::Context* ui_context_ = nullptr;
    Rml::ElementDocument* test_document_ = nullptr;
    std::shared_ptr<int> sentinel_ = std::make_shared<int>();
};
 
} // namespace unravel