Class painter

boost::ui::painter — 2D graphics rendering painter

Synopsis

// In header: <boost/ui/painter.hpp>


class painter {
public:
  // types
  typedef double gcoord_type;         // Graphics coordinates signed number type. 
  typedef void * native_handle_type;  // Implementation-defined painter type. 

  // member classes/structs/unions

  // Saves state in the constructor and restores it in the destructor.

  class state_saver : private noncopyable {
  public:
    // construct/copy/destruct
    state_saver(painter &);
    ~state_saver();
  };

  // construct/copy/destruct
  painter(unspecified);

  // private member functions
  void save_raw();
  void restore_raw();
  void scale_raw(gcoord_type, gcoord_type);
  void rotate_raw(gcoord_type);
  void translate_raw(gcoord_type, gcoord_type);
  void fill_color_raw(const color &);
  void stroke_color_raw(const color &);
  void clear_rect_raw(gcoord_type, gcoord_type, gcoord_type, gcoord_type);
  void fill_rect_raw(gcoord_type, gcoord_type, gcoord_type, gcoord_type);
  void stroke_rect_raw(gcoord_type, gcoord_type, gcoord_type, gcoord_type);
  void fill_text_raw(const uistring &, gcoord_type, gcoord_type);
  void draw_image_raw(const image &, gcoord_type, gcoord_type);
  void begin_path_raw();
  void fill_raw();
  void stroke_raw();
  void line_width_raw(gcoord_type);
  void line_cap_raw(ui::line_cap);
  void line_join_raw(ui::line_join);
  void line_dash_raw(const std::vector< gcoord_type > &);
  void reset_line_dash_raw();
  void font_raw(const ui::font &);
  void close_path_raw();
  void move_to_raw(gcoord_type, gcoord_type);
  void line_to_raw(gcoord_type, gcoord_type);
  void quadratic_curve_to_raw(gcoord_type, gcoord_type, gcoord_type, 
                              gcoord_type);
  void bezier_curve_to_raw(gcoord_type, gcoord_type, gcoord_type, gcoord_type, 
                           gcoord_type, gcoord_type);
  void arc_raw(gcoord_type, gcoord_type, gcoord_type, gcoord_type, 
               gcoord_type, bool);
  void rect_raw(gcoord_type, gcoord_type, gcoord_type, gcoord_type);

  // public member functions
  painter & save();
  painter & restore();
  painter & scale(gcoord_type, gcoord_type);
  painter & rotate(gcoord_type);
  painter & fill_color(const color &);
  painter & stroke_color(const color &);
  painter & begin_path();
  painter & fill();
  painter & stroke();
  painter & line_width(gcoord_type);
  painter & line_cap(ui::line_cap);
  painter & line_join(ui::line_join);
  painter & font(const ui::font &);
  ui::font font() const;
  painter & close_path();
};

Description

See Also:

2D computer graphics (Wikipedia)

See Also:

HTML Canvas 2D Context, Level 1 (W3C)

See Also:

HTML Canvas 2D Context, Level 2 (W3C)

`painter` public construct/copy/destruct

```
painter(unspecified impl);
```

`painter` private member functions

```
void save_raw();
```
```
void restore_raw();
```

void scale_raw(gcoord_type x, gcoord_type y);

```
void rotate_raw(gcoord_type angle);
```

void translate_raw(gcoord_type x, gcoord_type y);

```
void fill_color_raw(const color & c);
```
```
void stroke_color_raw(const color & c);
```

void clear_rect_raw(gcoord_type x, gcoord_type y, gcoord_type width, 
                    gcoord_type height);

void fill_rect_raw(gcoord_type x, gcoord_type y, gcoord_type width, 
                   gcoord_type height);

void stroke_rect_raw(gcoord_type x, gcoord_type y, gcoord_type width, 
                     gcoord_type height);

void fill_text_raw(const uistring & text, gcoord_type x, gcoord_type y);

void draw_image_raw(const image & img, gcoord_type dx, gcoord_type dy);

```
void begin_path_raw();
```
```
void fill_raw();
```
```
void stroke_raw();
```
```
void line_width_raw(gcoord_type width);
```
```
void line_cap_raw(ui::line_cap lc);
```
```
void line_join_raw(ui::line_join lj);
```

void line_dash_raw(const std::vector< gcoord_type > & segments);

```
void reset_line_dash_raw();
```
```
void font_raw(const ui::font & f);
```
```
void close_path_raw();
```

void move_to_raw(gcoord_type x, gcoord_type y);

void line_to_raw(gcoord_type x, gcoord_type y);

void quadratic_curve_to_raw(gcoord_type cpx, gcoord_type cpy, gcoord_type x, 
                            gcoord_type y);

void bezier_curve_to_raw(gcoord_type cp1x, gcoord_type cp1y, gcoord_type cp2x, 
                         gcoord_type cp2y, gcoord_type x, gcoord_type y);

void arc_raw(gcoord_type x, gcoord_type y, gcoord_type radius, 
             gcoord_type start_angle, gcoord_type end_angle, 
             bool anticlockwise);

void rect_raw(gcoord_type x, gcoord_type y, gcoord_type w, gcoord_type h);

`painter` public member functions

```
painter & save();
```
Push state.
```
painter & restore();
```
Pop state.

painter & scale(gcoord_type x, gcoord_type y);

Adds scaling transformation.

```
painter & rotate(gcoord_type angle);
```
Adds rotation transformation.
```
painter & fill_color(const color & c);
```
Sets the current color used for filling shapes.
```
painter & stroke_color(const color & c);
```
Sets the current color used for filling shapes.
```
painter & begin_path();
```
Resets the current path.
```
painter & fill();
```
Fills the current path.
```
painter & stroke();
```
Strokes the current path.

painter & line_width(gcoord_type width);

Sets line width (default is 1)

```
painter & line_cap(ui::line_cap lc);
```
Sets type of line endings, default value is butt.
```
painter & line_join(ui::line_join lj);
```
Sets type of line join, default value is miter.
```
painter & font(const ui::font & f);
```
Sets font.
```
ui::font font() const;
```
Returns font.
```
painter & close_path();
```
Connects the last point to the first point in the subpath.

Class painter

Synopsis

Description

painter public construct/copy/destruct

painter private member functions

painter public member functions

`painter` public construct/copy/destruct

`painter` private member functions

`painter` public member functions