libigl_Martin/include/igl/opengl/glfw/imgui/ImGuiMenu.h

#ifndef IGL_OPENGL_GLFW_IMGUI_IMGUIMENU_H
#define IGL_OPENGL_GLFW_IMGUI_IMGUIMENU_H

////////////////////////////////////////////////////////////////////////////////
#include <igl/opengl/glfw/Viewer.h>
#include <igl/opengl/glfw/ViewerPlugin.h>
#include <igl/igl_inline.h>
////////////////////////////////////////////////////////////////////////////////

// Forward declarations
struct ImGuiContext;

namespace igl
{
namespace opengl
{
namespace glfw
{
namespace imgui
{

class ImGuiMenu : public igl::opengl::glfw::ViewerPlugin
{
protected:
  // Hidpi scaling to be used for text rendering.
  float m_HidpiScaling;

  // Ratio between the framebuffer size and the window size.
  // May be different from the hipdi scaling!
  float m_PixelRatio;

  // ImGui Context
  ImGuiContext * m_Context = nullptr;

public:
  IGL_INLINE virtual void init(igl::opengl::glfw::Viewer *_viewer) override;

  IGL_INLINE virtual void reload_font(int font_size = 13);

  IGL_INLINE virtual void shutdown() override;

  IGL_INLINE virtual bool pre_draw() override;

  IGL_INLINE  virtual bool post_draw() override;

  IGL_INLINE virtual void post_resize(int width, int height) override;

  // Mouse IO
  IGL_INLINE virtual bool mouse_down(int button, int modifier) override;

  IGL_INLINE virtual bool mouse_up(int button, int modifier) override;

  IGL_INLINE virtual bool mouse_move(int mouse_x, int mouse_y) override;

  IGL_INLINE virtual bool mouse_scroll(float delta_y) override;

  // Keyboard IO
  IGL_INLINE virtual bool key_pressed(unsigned int key, int modifiers) override;

  IGL_INLINE virtual bool key_down(int key, int modifiers) override;

  IGL_INLINE virtual bool key_up(int key, int modifiers) override;

  // Draw menu
  IGL_INLINE virtual void draw_menu();

  IGL_INLINE virtual void draw_viewer_menu();

  IGL_INLINE virtual void draw_other_menu() { }

  IGL_INLINE void draw_labels_menu();

  IGL_INLINE void draw_labels(const igl::opengl::ViewerData &data);

  IGL_INLINE void draw_text(Eigen::Vector3d pos, Eigen::Vector3d normal, const std::string &text);

  IGL_INLINE float pixel_ratio();

  IGL_INLINE float hidpi_scaling();

  float menu_scaling() { return m_HidpiScaling / m_PixelRatio; }
};

} // end namespace
} // end namespace
} // end namespace
} // end namespace

#ifndef IGL_STATIC_LIBRARY
#  include "ImGuiMenu.cpp"
#endif

#endif // IGL_OPENGL_GLFW_IMGUI_IMGUIMENU_H