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GogRenderer

GogRenderer — Rendering

Synopsis

                    GogRenderer;
GogRenderer *       gog_renderer_new                    (GogGraph *graph);
void                gog_renderer_draw_selection_rectangle
                                                        (GogRenderer *renderer,
                                                         GogViewAllocation const *rectangle);
void                gog_renderer_draw_shape             (GogRenderer *renderer,
                                                         GOPath const *path);
void                gog_renderer_fill_serie             (GogRenderer *renderer,
                                                         GOPath const *path,
                                                         GOPath const *close_path);
void                gog_renderer_fill_shape             (GogRenderer *renderer,
                                                         GOPath const *path);
void                gog_renderer_fill_circle            (GogRenderer *rend,
                                                         double x,
                                                         double y,
                                                         double r);
void                gog_renderer_fill_rectangle         (GogRenderer *rend,
                                                         GogViewAllocation const *rect);
double              gog_renderer_get_hairline_width_pts (GogRenderer const *rend);
void                gog_renderer_push_clip_rectangle    (GogRenderer *rend,
                                                         double x,
                                                         double y,
                                                         double w,
                                                         double h);
gboolean            gog_renderer_render_to_cairo        (GogRenderer *renderer,
                                                         cairo_t *cairo,
                                                         double width,
                                                         double height);
void                gog_renderer_stroke_serie           (GogRenderer *renderer,
                                                         GOPath const *path);
void                gog_renderer_stroke_shape           (GogRenderer *renderer,
                                                         GOPath const *path);
void                gog_renderer_stroke_circle          (GogRenderer *rend,
                                                         double x,
                                                         double y,
                                                         double r);
void                gog_renderer_stroke_rectangle       (GogRenderer *rend,
                                                         GogViewAllocation const *rect);
void                gog_renderer_request_update         (GogRenderer *renderer);
void                gog_renderer_push_style             (GogRenderer *rend,
                                                         GOStyle const *style);
void                gog_renderer_pop_style              (GogRenderer *rend);
void                gog_renderer_push_clip              (GogRenderer *rend,
                                                         GOPath const *path);
void                gog_renderer_pop_clip               (GogRenderer *rend);
void                gog_renderer_draw_circle            (GogRenderer *rend,
                                                         double x,
                                                         double y,
                                                         double r);
void                gog_renderer_draw_rectangle         (GogRenderer *rend,
                                                         GogViewAllocation const *rect);
void                gog_renderer_draw_text              (GogRenderer *rend,
                                                         char const *text,
                                                         GogViewAllocation const *pos,
                                                         GtkAnchorType anchor,
                                                         gboolean use_markup);
void                gog_renderer_draw_marker            (GogRenderer *rend,
                                                         double x,
                                                         double y);
void                gog_renderer_draw_grip              (GogRenderer *renderer,
                                                         double x,
                                                         double y);
#define             gog_renderer_in_grip                (x,
                                                         y,
                                                         grip_x,
                                                         grip_y)
void                gog_renderer_get_text_OBR           (GogRenderer *rend,
                                                         char const *text,
                                                         gboolean use_markup,
                                                         GOGeometryOBR *obr);
void                gog_renderer_get_text_AABR          (GogRenderer *rend,
                                                         char const *text,
                                                         gboolean use_markup,
                                                         GOGeometryAABR *aabr);
double              gog_renderer_line_size              (GogRenderer const *r,
                                                         double width);
double              gog_renderer_pt2r_x                 (GogRenderer const *r,
                                                         double d);
double              gog_renderer_pt2r_y                 (GogRenderer const *r,
                                                         double d);
double              gog_renderer_pt2r                   (GogRenderer const *r,
                                                         double d);
gboolean            gog_renderer_export_image           (GogRenderer *renderer,
                                                         GOImageFormat format,
                                                         GsfOutput *output,
                                                         double x_dpi,
                                                         double y_dpi);
gboolean            gog_renderer_update                 (GogRenderer *renderer,
                                                         double w,
                                                         double h);
GdkPixbuf *         gog_renderer_get_pixbuf             (GogRenderer *renderer);
cairo_surface_t *   gog_renderer_get_cairo_surface      (GogRenderer *renderer);

Object Hierarchy

  GObject
   +----GogRenderer

Properties

  "model"                    GogGraph*             : Read / Write
  "view"                     GogView*              : Read

Signals

  "request-update"                                 : Run Last

Description

Note that GogGraph has a functions for export/rendering, so you do not always need to use a GogRenderer directly.

Details

GogRenderer

typedef struct _GogRenderer GogRenderer;


gog_renderer_new ()

GogRenderer *       gog_renderer_new                    (GogGraph *graph);

graph :

graph model

Returns :

a new GogRenderer which can render into a pixbuf, and sets graph as its model.

gog_renderer_draw_selection_rectangle ()

void                gog_renderer_draw_selection_rectangle
                                                        (GogRenderer *renderer,
                                                         GogViewAllocation const *rectangle);

renderer :

rectangle :


gog_renderer_draw_shape ()

void                gog_renderer_draw_shape             (GogRenderer *renderer,
                                                         GOPath const *path);

renderer :

path :


gog_renderer_fill_serie ()

void                gog_renderer_fill_serie             (GogRenderer *renderer,
                                                         GOPath const *path,
                                                         GOPath const *close_path);

renderer :

path :

close_path :


gog_renderer_fill_shape ()

void                gog_renderer_fill_shape             (GogRenderer *renderer,
                                                         GOPath const *path);

renderer :

path :


gog_renderer_fill_circle ()

void                gog_renderer_fill_circle            (GogRenderer *rend,
                                                         double x,
                                                         double y,
                                                         double r);

rend :

x :

y :

r :


gog_renderer_fill_rectangle ()

void                gog_renderer_fill_rectangle         (GogRenderer *rend,
                                                         GogViewAllocation const *rect);

rend :

rect :


gog_renderer_get_hairline_width_pts ()

double              gog_renderer_get_hairline_width_pts (GogRenderer const *rend);

rend :

a GogRenderer

Returns :

the hairline width in pts.

gog_renderer_push_clip_rectangle ()

void                gog_renderer_push_clip_rectangle    (GogRenderer *rend,
                                                         double x,
                                                         double y,
                                                         double w,
                                                         double h);

Defines a rectangular clipping region. For efficient screen rendering, this function takes care to round the coordinates.

rend :

GogRenderer

x :

left coordinate

y :

top coordinate

w :

width of clipping rectangle

h :

height of clipping rectangle

gog_renderer_render_to_cairo ()

gboolean            gog_renderer_render_to_cairo        (GogRenderer *renderer,
                                                         cairo_t *cairo,
                                                         double width,
                                                         double height);

renderer :

cairo :

width :

height :

Returns :


gog_renderer_stroke_serie ()

void                gog_renderer_stroke_serie           (GogRenderer *renderer,
                                                         GOPath const *path);

renderer :

path :


gog_renderer_stroke_shape ()

void                gog_renderer_stroke_shape           (GogRenderer *renderer,
                                                         GOPath const *path);

renderer :

path :


gog_renderer_stroke_circle ()

void                gog_renderer_stroke_circle          (GogRenderer *rend,
                                                         double x,
                                                         double y,
                                                         double r);

rend :

x :

y :

r :


gog_renderer_stroke_rectangle ()

void                gog_renderer_stroke_rectangle       (GogRenderer *rend,
                                                         GogViewAllocation const *rect);

rend :

rect :


gog_renderer_request_update ()

void                gog_renderer_request_update         (GogRenderer *renderer);

renderer :


gog_renderer_push_style ()

void                gog_renderer_push_style             (GogRenderer *rend,
                                                         GOStyle const *style);

rend :

style :


gog_renderer_pop_style ()

void                gog_renderer_pop_style              (GogRenderer *rend);

rend :


gog_renderer_push_clip ()

void                gog_renderer_push_clip              (GogRenderer *rend,
                                                         GOPath const *path);

Defines the current clipping region.

rend :

GogRenderer

path :

a GOPath

gog_renderer_pop_clip ()

void                gog_renderer_pop_clip               (GogRenderer *rend);

End the current clipping.

rend :

GogRenderer

gog_renderer_draw_circle ()

void                gog_renderer_draw_circle            (GogRenderer *rend,
                                                         double x,
                                                         double y,
                                                         double r);

rend :

x :

y :

r :


gog_renderer_draw_rectangle ()

void                gog_renderer_draw_rectangle         (GogRenderer *rend,
                                                         GogViewAllocation const *rect);

A utility routine to build a closed rectangle vpath.

rend :

a GogRenderer

rect :

position and extent of rectangle

gog_renderer_draw_text ()

void                gog_renderer_draw_text              (GogRenderer *rend,
                                                         char const *text,
                                                         GogViewAllocation const *pos,
                                                         GtkAnchorType anchor,
                                                         gboolean use_markup);

Have rend draw text in the at pos.{x,y} anchored by the anchor corner. If pos.w or pos.h are >= 0 then clip the results to less than that size.

rend :

GogRenderer

text :

the string to draw

pos :

GogViewAllocation

anchor :

GtkAnchorType how to draw relative to pos

use_markup :

wether to use pango markup

gog_renderer_draw_marker ()

void                gog_renderer_draw_marker            (GogRenderer *rend,
                                                         double x,
                                                         double y);

rend :

GogRenderer

x :

X-coordinate

y :

Y-coordinate

gog_renderer_draw_grip ()

void                gog_renderer_draw_grip              (GogRenderer *renderer,
                                                         double x,
                                                         double y);

Draw a grip, used for moving/resizing of objects.

renderer :

GogRenderer

x :

x position of grip

y :

y position of grip

gog_renderer_in_grip()

#define             gog_renderer_in_grip(x,y,grip_x,grip_y)

x :

y :

grip_x :

grip_y :


gog_renderer_get_text_OBR ()

void                gog_renderer_get_text_OBR           (GogRenderer *rend,
                                                         char const *text,
                                                         gboolean use_markup,
                                                         GOGeometryOBR *obr);

rend :

GogRenderer

text :

the string to draw

use_markup :

wether to use pango markup

obr :

GOGeometryOBR to store the Object Bounding Rectangle of text.

gog_renderer_get_text_AABR ()

void                gog_renderer_get_text_AABR          (GogRenderer *rend,
                                                         char const *text,
                                                         gboolean use_markup,
                                                         GOGeometryAABR *aabr);

rend :

GogRenderer

text :

the string to draw

use_markup :

wether to use pango markup

aabr :

GOGeometryAABR to store the Axis Aligned Bounding Rectangle of text.

gog_renderer_line_size ()

double              gog_renderer_line_size              (GogRenderer const *r,
                                                         double width);

r :

width :

Returns :


gog_renderer_pt2r_x ()

double              gog_renderer_pt2r_x                 (GogRenderer const *r,
                                                         double d);

r :

d :

Returns :


gog_renderer_pt2r_y ()

double              gog_renderer_pt2r_y                 (GogRenderer const *r,
                                                         double d);

r :

d :

Returns :


gog_renderer_pt2r ()

double              gog_renderer_pt2r                   (GogRenderer const *r,
                                                         double d);

r :

d :

Returns :


gog_renderer_export_image ()

gboolean            gog_renderer_export_image           (GogRenderer *renderer,
                                                         GOImageFormat format,
                                                         GsfOutput *output,
                                                         double x_dpi,
                                                         double y_dpi);

Exports an image of graph in given format, writing results in a GsfOutput stream. If export format type is a bitmap one, it computes image size with x_dpi, y_dpi and graph size (see gog_graph_get_size()).

renderer :

a GogRenderer

format :

image format for export

output :

a GsfOutput stream

x_dpi :

x resolution of exported graph

y_dpi :

y resolution of exported graph

Returns :

TRUE if export succeed.

gog_renderer_update ()

gboolean            gog_renderer_update                 (GogRenderer *renderer,
                                                         double w,
                                                         double h);

Requests a renderer update, only useful for pixbuf based renderer.

renderer :

a GogRenderer

w :

requested width

h :

requested height

Returns :

TRUE if a redraw is necessary.

gog_renderer_get_pixbuf ()

GdkPixbuf *         gog_renderer_get_pixbuf             (GogRenderer *renderer);

renderer :

GogRenderer

Returns :

current pixbuf buffer from a renderer that can render into a pixbuf. or NULL on error.

gog_renderer_get_cairo_surface ()

cairo_surface_t *   gog_renderer_get_cairo_surface      (GogRenderer *renderer);

renderer :

Returns :

Property Details

The "model" property

  "model"                    GogGraph*             : Read / Write

The GogGraph this renderer displays.


The "view" property

  "view"                     GogView*              : Read

the GogView this renderer is displaying.

Signal Details

The "request-update" signal

void                user_function                      (GogRenderer *gogrenderer,
                                                        gpointer     user_data)        : Run Last

gogrenderer :

the object which received the signal.

user_data :

user data set when the signal handler was connected.
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