| Goffice Reference Manual | ||||
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GogChartMap;
GogChartMapPolarData;
GogChartMap* gog_chart_map_new (GogChart *chart,
GogViewAllocation const *area,
GogAxis *axis0,
GogAxis *axis1,
GogAxis *axis2,
gboolean fill_area);
void gog_chart_map_free (GogChartMap *map);
gboolean gog_chart_map_is_valid (GogChartMap *map);
void gog_chart_map_2D_to_view (GogChartMap *map,
double x,
double y,
double *u,
double *v);
GogAxisMap* gog_chart_map_get_axis_map (GogChartMap *map,
unsigned int index);
GogChartMapPolarData* gog_chart_map_get_polar_parms (GogChartMap *map);
typedef struct {
double cx, cy;
double rx, ry;
double th0, th1;
} GogChartMapPolarData;
GogChartMap* gog_chart_map_new (GogChart *chart, GogViewAllocation const *area, GogAxis *axis0, GogAxis *axis1, GogAxis *axis2, gboolean fill_area);
Creates a new GogChartMap, used for conversion from data space to canvas space.
void gog_chart_map_free (GogChartMap *map);
Frees map object.
map : |
a GogChartMap |
gboolean gog_chart_map_is_valid (GogChartMap *map);
Tests if map was correctly initializied, i.e. if all associated axis_map
are valid (see gog_axis_map_is_valid() ).
given to gog_chart_map_new.
map : |
a GogChartMap |
| Returns : | TRUE if map is valid.
|
void gog_chart_map_2D_to_view (GogChartMap *map, double x, double y, double *u, double *v);
Converts a 2D coordinate from data space to canvas space.
map : |
a GogChartMap |
x : |
data x value |
y : |
data y value |
u : |
placeholder for x converted value |
v : |
placeholder for y converted value |
GogAxisMap* gog_chart_map_get_axis_map (GogChartMap *map, unsigned int index);
Convenience function which returns one of the associated axis_map.
Valid values are in range [0..2].
map : |
a GogChartMap |
index : |
axis index |
| Returns : | a GogAxisMap. |
GogChartMapPolarData* gog_chart_map_get_polar_parms (GogChartMap *map);
Convenience function for retrieving data related to polar plot layout.
map : |
a GogChartMap |
| Returns : | a GogChartMapPolarData struct. |