GuiSystem.h

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#include "Core.h"
#include <functional>
#include <span>
#include <entt/entity/fwd.hpp>
#include <SDL3/SDL_stdinc.h>
 
struct SDL_Window;
 
namespace candlewick {
 
class GuiSystem {
  RenderContext const *m_renderer;
  bool m_initialized = false;
  std::function<void(const RenderContext &)> m_callback;
 
  bool init();
 
public:
  using GuiBehavior = std::function<void(const RenderContext &)>;
 
  GuiSystem(const RenderContext &renderer, GuiBehavior behav);
  GuiSystem(GuiSystem &&other) noexcept
      : m_renderer{other.m_renderer}
      , m_initialized(other.m_initialized)
      , m_callback(std::move(other.m_callback)) {
    other.m_renderer = nullptr;
    other.m_initialized = false;
  }
 
  void render(CommandBuffer &cmdBuf);
 
  void release();
 
  bool initialized() const { return m_initialized; }
};
 
enum class DialogFileType { IMAGES, VIDEOS };

void generateMediaFilenameFromTimestamp(
    const char *prefix, std::string &out, const char *extension = ".png",
    DialogFileType file_type = DialogFileType::IMAGES);

namespace gui {
  void showCandlewickAboutWindow(bool *p_open = NULL, float wrap_width = 400.f);

  void addLightControls(DirectionalLight &light);

  void addLightControls(std::span<DirectionalLight> lights);
 
  void addLightControls(std::span<DirectionalLight> lights, Uint32 numLights,
                        Uint32 start = 0);

  void addDisableCheckbox(const char *label, entt::registry &reg,
                          entt::entity id, bool &flag);

  void addFileDialog(SDL_Window *window, DialogFileType dialog_file_type,
                     std::string &filename);
} // namespace gui
 
} // namespace candlewick