GogAxisMap

typedef struct _GogAxisMap GogAxisMap;

gog_axis_map_new ()

GogAxisMap*         gog_axis_map_new                    (GogAxis *axis,
                                                         double offset,
                                                         double length);

Creates a GogAxisMap for data mapping to plot window. offset and length are optional parameters to be used with gog_axis_map_to_view in order to translates data coordinates into canvas space.

gog_axis_map ()

double              gog_axis_map                        (GogAxisMap *map,
                                                         double value);

Converts value to plot coordinates. A value in [0,1.0] range means a data within axis bounds.

gog_axis_map_to_view ()

double              gog_axis_map_to_view                (GogAxisMap *map,
                                                         double value);

Converts value from data space to canvas space, using offset and length parameters given to gog_axis_map_new.

gog_axis_map_from_view ()

double              gog_axis_map_from_view              (GogAxisMap *map,
                                                         double value);

Converts value from canvas space to data space.

gog_axis_map_finite ()

gboolean            gog_axis_map_finite                 (GogAxisMap *map,
                                                         double value);

Tests wether value is valid for the given map.

gog_axis_map_get_baseline ()

double              gog_axis_map_get_baseline           (GogAxisMap *map);

Gets the baseline for map, in view coordinates, clipped to offset and offset+length, where offset and length are the parameters of gog_axis_map_new.

gog_axis_map_get_extents ()

void                gog_axis_map_get_extents            (GogAxisMap *map,
                                                         double *start,
                                                         double *stop);

Gets start and stop for the given axis map in data coordinates. If axis is not inverted, start = minimum and stop = maximum. If axis is invalid, it'll return arbitrary bounds. For example, an non inverted invalid X axis will have start set to 0.0 and stop set to 1.0.

minimum or maximum can be NULL.

gog_axis_map_get_bounds ()

void                gog_axis_map_get_bounds             (GogAxisMap *map,
                                                         double *minimum,
                                                         double *maximum);

Gets bounds for the given axis map in data coordinates. If axis is invalid, it'll return arbitrary bounds. For example, for an invalid x axis, minimum = 0.0 and maximum = 1.0.

minimum or maximum can be NULL.

gog_axis_map_free ()

void                gog_axis_map_free                   (GogAxisMap *map);

Frees GogAxisMap object.

gog_axis_map_is_valid ()

gboolean            gog_axis_map_is_valid               (GogAxisMap *map);

Tests if map was correctly initialized, i.e. if bounds are valid.