GocGroup

typedef struct _GocGroup GocGroup;

GocGroupClass

typedef struct {
	GocItemClass base;
} GocGroupClass;

goc_group_new ()

GocGroup *          goc_group_new                       (GocGroup *parent);

Creates a new GocGroup as a child of parent.

goc_group_add_child ()

void                goc_group_add_child                 (GocGroup *parent,
                                                         GocItem *item);

Adds item as a new child to parent.

goc_group_remove_child ()

void                goc_group_remove_child              (GocGroup *parent,
                                                         GocItem *item);

Removes item from parent. This function will fail if item is not a child of parent.

goc_group_clear ()

void                goc_group_clear                     (GocGroup *group);

Destroys all group children.

goc_group_adjust_bounds ()

void                goc_group_adjust_bounds             (GocGroup const *group,
                                                         double *x0,
                                                         double *y0,
                                                         double *x1,
                                                         double *y1);

Adds group horizontal offset to x0 and x1, and vertical offset to y0 and y1. This function is called recursively so that when returning x0, y0, x1, and y1 are absolute coordinates in canvas space,

goc_group_adjust_coords ()

void                goc_group_adjust_coords             (GocGroup const *group,
                                                         double *x,
                                                         double *y);

Adds group horizontal offset to x0, and vertical offset to y0. This function is called recursively so that when returning x0 and y0 are absolute coordinates in canvas space,

goc_group_cairo_transform ()

void                goc_group_cairo_transform           (GocGroup const *group,
                                                         cairo_t *cr,
                                                         double x,
                                                         double y);

Translates cr current context so that operations start at (x,y), which are group relative coordinates, and is scaled according to the containing GocCanvas current scale (see goc_canvas_get_pixels_per_unit()). The translation takes all group ancestors into account.

This function does not call cairo_save().

The "x" property

  "x"                        gdouble               : Read / Write

The group horizontal offset.

Default value: 0

The "y" property

  "y"                        gdouble               : Read / Write

The group vertical offset.

Default value: 0