KnotHolder *createKnotHolder(SPItem *item, SPDesktop *desktop)
{
KnotHolder *knotholder = NULL;
if (SP_IS_LPE_ITEM(item) &&
SP_LPE_ITEM(item)->getCurrentLPE() &&
SP_LPE_ITEM(item)->getCurrentLPE()->isVisible() &&
SP_LPE_ITEM(item)->getCurrentLPE()->providesKnotholder()) {
knotholder = sp_lpe_knot_holder(item, desktop);
} else if (SP_IS_RECT(item)) {
knotholder = new RectKnotHolder(desktop, item, NULL);
} else if (SP_IS_BOX3D(item)) {
knotholder = new Box3DKnotHolder(desktop, item, NULL);
} else if (SP_IS_GENERICELLIPSE(item)) {
knotholder = new ArcKnotHolder(desktop, item, NULL);
} else if (SP_IS_STAR(item)) {
knotholder = new StarKnotHolder(desktop, item, NULL);
} else if (SP_IS_SPIRAL(item)) {
knotholder = new SpiralKnotHolder(desktop, item, NULL);
} else if (SP_IS_OFFSET(item)) {
knotholder = new OffsetKnotHolder(desktop, item, NULL);
} else if (SP_IS_FLOWTEXT(item) && SP_FLOWTEXT(item)->has_internal_frame()) {
knotholder = new FlowtextKnotHolder(desktop, SP_FLOWTEXT(item)->get_frame(NULL), NULL);
} else if ((item->style->fill.isPaintserver())
&& SP_IS_PATTERN(item->style->getFillPaintServer())) {
knotholder = new KnotHolder(desktop, item, NULL);
knotholder->add_pattern_knotholder();
}
return knotholder;
}
void
sp_spiral_get_polar (SPSpiral *spiral, gdouble t, gdouble *rad, gdouble *arg)
{
g_return_if_fail (spiral != NULL);
g_return_if_fail (SP_IS_SPIRAL(spiral));
if (rad)
*rad = spiral->rad * pow(t, spiral->exp);
if (arg)
*arg = 2.0 * M_PI * spiral->revo * t + spiral->arg;
}
void
sp_spiral_get_xy (SPSpiral *spiral, gdouble t, NRPointF *p)
{
gdouble rad, arg;
g_return_if_fail (spiral != NULL);
g_return_if_fail (SP_IS_SPIRAL(spiral));
g_return_if_fail (p != NULL);
rad = spiral->rad * pow(t, spiral->exp);
arg = 2.0 * M_PI * spiral->revo * t + spiral->arg;
p->x = rad * cos (arg) + spiral->cx;
p->y = rad * sin (arg) + spiral->cy;
}
bool
item_type_match (SPItem *item, GtkWidget *widget)
{
SPDesktop *desktop = SP_ACTIVE_DESKTOP;
if (SP_IS_RECT(item)) {
return (type_checkbox (widget, "shapes") || type_checkbox (widget, "rects"));
} else if (SP_IS_GENERICELLIPSE(item) || SP_IS_ELLIPSE(item) || SP_IS_ARC(item) || SP_IS_CIRCLE(item)) {
return (type_checkbox (widget, "shapes") || type_checkbox (widget, "ellipses"));
} else if (SP_IS_STAR(item) || SP_IS_POLYGON(item)) {
return (type_checkbox (widget, "shapes") || type_checkbox (widget, "stars"));
} else if (SP_IS_SPIRAL(item)) {
return (type_checkbox (widget, "shapes") || type_checkbox (widget, "spirals"));
} else if (SP_IS_PATH(item) || SP_IS_LINE(item) || SP_IS_POLYLINE(item)) {
return (type_checkbox (widget, "paths"));
} else if (SP_IS_TEXT(item) || SP_IS_TSPAN(item) || SP_IS_TREF(item) || SP_IS_STRING(item)) {
return (type_checkbox (widget, "texts"));
} else if (SP_IS_GROUP(item) && !desktop->isLayer(item) ) { // never select layers!
return (type_checkbox (widget, "groups"));
} else if (SP_IS_USE(item)) {
return (type_checkbox (widget, "clones"));
} else if (SP_IS_IMAGE(item)) {
return (type_checkbox (widget, "images"));
} else if (SP_IS_OFFSET(item)) {
return (type_checkbox (widget, "offsets"));
}
return false;
}
void
sp_spiral_position_set (SPSpiral *spiral,
gdouble cx,
gdouble cy,
gdouble exp,
gdouble revo,
gdouble rad,
gdouble arg,
gdouble t0)
{
g_return_if_fail (spiral != NULL);
g_return_if_fail (SP_IS_SPIRAL (spiral));
spiral->cx = cx;
spiral->cy = cy;
spiral->exp = exp;
spiral->revo = revo;
spiral->rad = MAX (rad, 0.001);
spiral->arg = arg;
spiral->t0 = t0;
sp_object_request_update ((SPObject *) spiral, SP_OBJECT_MODIFIED_FLAG);
}
