index beefc7640d98659fe292272062f24778d369b390..c2b1a2648f288d8ec4d5f230e3dfd4638157ca4c 100644 (file)
void
sp_item_rotate_rel(SPItem *item, NR::rotate const &rotation)
{
- NR::translate const s(sp_item_bbox_desktop(item).midpoint());
-
- // Rotate item.
- sp_item_set_i2d_affine(item,
- sp_item_i2d_affine(item) * inverse(s) * rotation * s);
-
- // Use each item's own transform writer, consistent with sp_selection_apply_affine()
- sp_item_write_transform(item, SP_OBJECT_REPR(item), item->transform);
+ NR::Point center = item->getCenter();
+ NR::translate const s(item->getCenter());
+ NR::Matrix affine = NR::Matrix(inverse(s)) * NR::Matrix(rotation) * NR::Matrix(s);
+
+ // Rotate item.
+ sp_item_set_i2d_affine(item, sp_item_i2d_affine(item) * affine);
+ // Use each item's own transform writer, consistent with sp_selection_apply_affine()
+ sp_item_write_transform(item, SP_OBJECT_REPR(item), item->transform);
+
+ // Restore the center position (it's changed because the bbox center changed)
+ if (item->isCenterSet()) {
+ item->setCenter(center * affine);
+ }
}
void
sp_item_scale_rel (SPItem *item, NR::scale const &scale)
{
- NR::translate const s(sp_item_bbox_desktop(item).midpoint());
+ NR::translate const s(sp_item_bbox_desktop(item).midpoint()); // use getCenter?
sp_item_set_i2d_affine(item,
sp_item_i2d_affine(item) * inverse(s) * scale * s);
void
sp_item_skew_rel (SPItem *item, double skewX, double skewY)
{
- NR::Rect bbox(sp_item_bbox_desktop(item));
+ NR::Point center = item->getCenter();
+ NR::translate const s(item->getCenter());
- NR::translate const s(bbox.midpoint());
+ NR::Matrix const skew(1, skewY, skewX, 1, 0, 0);
+ NR::Matrix affine = NR::Matrix(inverse(s)) * skew * NR::Matrix(s);
- NR::Matrix const skew(1, skewY, skewX, 1, 0, 0);
+ sp_item_set_i2d_affine(item, sp_item_i2d_affine(item) * affine);
+ sp_item_write_transform(item, SP_OBJECT_REPR(item), item->transform);
- sp_item_set_i2d_affine(item,
- sp_item_i2d_affine(item) * inverse(s) * skew * s);
- sp_item_write_transform(item, SP_OBJECT_REPR(item), item->transform);
+ // Restore the center position (it's changed because the bbox center changed)
+ if (item->isCenterSet()) {
+ item->setCenter(center * affine);
+ }
}
void sp_item_move_rel(SPItem *item, NR::translate const &tr)