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;
 
public:
  using GuiBehavior = std::function<void(const RenderContext &)>;
 
  GuiSystem(const RenderContext &renderer, GuiBehavior behav);
 
  void addCallback(GuiBehavior cb) { _callbacks.push_back(std::move(cb)); }
 
  void render(CommandBuffer &cmdBuf);
 
  void release();
 
  bool initialized() const { return m_initialized; }
 
  std::vector<GuiBehavior> _callbacks;
 
private:
  bool init(const RenderContext &renderer);
};

void showCandlewickAboutWindow(bool *p_open = NULL, float wrap_width = 400.f);
 
struct DirectionalLight;

void guiAddLightControls(DirectionalLight &light);

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

void guiAddDisableCheckbox(const char *label, entt::registry &reg,
                           entt::entity id, bool &flag);
 
enum class DialogFileType { IMAGES, VIDEOS };

void guiAddFileDialog(SDL_Window *window, DialogFileType dialog_file_type,
                      std::string &filename);
 
std::string generateMediaFilenameFromTimestamp(
    const char *prefix = "cdw_screenshot", const char *extension = ".png",
    DialogFileType file_type = DialogFileType::IMAGES);
 
} // namespace candlewick