Program Listing for File CairoDrawer.h

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#ifndef CAIRODRAWER_H_
#define CAIRODRAWER_H_

#include "Drawer.h"
#include <cairommconfig.h>
#include <cairomm/context.h>
#include <cairomm/surface.h>
#include <array>

class CairoDrawer : public Drawer
{
public:
  static const double RADIAL_TEXT_FACTOR;

  static const double COORDGRID_ADJUSTMENT, COORDPOINT_ANGLE;

  static const double END_RADIUS_MAJOR_FACTOR, END_RADIUS_MINOR_FACTOR,
      RADIUS_TICK_LABEL_FACTOR;

  static const double IO_LINE_WIDTH, CONNECTOR_ARC_RATIO,
      CONNECTOR_ARROW_HEIGHT, CONNECTOR_ARROW_ANGLE;

  static const double INPUT_RADIUS_DELTA, CONNECTOR_DELTA, TEXT_DELTA,
      ANGLE_DELTA_SMALL, ANGLE_DELTA_MEDIUM, ANGLE_DELTA_LARGE, RADIUS_DELTA,
      OUTPUT_EXTREME_RADIUS_DELTA, OUTPUT_LABEL_LINE_END_DELTA,
      OUTPUT_LABEL_FONT_FACTOR;

private:
  Cairo::RefPtr<Cairo::Context> cairo_context;

public:
  CairoDrawer (const std::string & fpath, int width, int height,
           std::size_t num_inputs_);

  virtual
  ~CairoDrawer ()
  {
    this->finish ();
  }

  virtual void
  change_surface (const std::string& fpath, int width, int height,
          std::size_t num_inputs_);

  virtual void
  draw_output_grid (const OutputGrid& grid);

  virtual void
  draw_input_axis (const InputAxis& axis);

  virtual void
  draw_io_vector (const IOVector& iov);

  virtual void
  finish ();

protected:
  virtual void
  set_surface (const std::string& fpath, int width, int height);

  virtual void
  draw_histogram (const InputAxis::Histogram& histogram, double radius,
          const Angle& start, const Angle& end);

  virtual void
  draw_link (const Polar& origin1, const Polar& origin2, const Polar& target1,
         const Polar& target2, const DrawerProperties<>& prop);

  virtual void
  draw_connector (const Polar& from, const Polar& to,
          const DrawerProperties<>& prop);

  virtual void
  draw_segment_axis (double inner_radius, double thickness, const Angle& start,
             const Angle& end,
             const DrawerProperties<std::array<Color, 10>>& prop,
             Direction dir);

  virtual void
  draw_output_label (const Label& output_label, double radius_label,
             double radius_output, const Angle& begin,
             const Angle& end);

  virtual void
  draw_arrow (const Polar& start, const DrawerProperties<>& prop);

  virtual void
  draw_ring_segment (double radius, double thickness, const Angle& begin,
             const Angle & end, const DrawerProperties<> & prop,
             Direction dir);

  virtual void
  draw_connector_segment (double begin_radius, double begin_angle,
              double end_radius, double end_angle,
              const DrawerProperties<>& prop);

  virtual void
  draw_line (const Polar& from, const Polar& to,
         const DrawerProperties<> & prop);

  virtual void
  draw_arc (double inner_radius, const Angle& start, const Angle& end,
        Direction dir);

  virtual void
  draw_coord_point (const Polar& coord, const Angle& width, double height,
            const DrawerProperties<> & prop);

  virtual void
  draw_text_parallel (
      const Label& label, const Polar& start, const TextAlignment & alignment =
      TextAlignment::CENTERED);

  virtual void
  draw_text_orthogonal (const Label& label, const Polar& start,
            const TextAlignment & alignment =
                TextAlignment::CENTERED);

  void
  set_font_face (const Label& label);

  Cairo::TextExtents
  get_text_extents (const Label& label) const;

  inline Angle
  get_cairo_angle (const Angle& angle)
  {
    return Angle (2 * M_PI - angle.value ());
  }
};

#endif /* DRAWER_H_ */