// SPDX-License-Identifier: GPL-2.0-or-later /** @file * Helper object for transforming selected items. */ /* Authors: * Lauris Kaplinski * bulia byak * Carl Hetherington * Diederik van Lierop * Abhishek Sharma * * Copyright (C) 1999-2002 Lauris Kaplinski * Copyright (C) 1999-2014 Authors * * Released under GNU GPL v2+, read the file 'COPYING' for more information. */ #include #include #include #include #include <2geom/transforms.h> #include "seltrans.h" #include "desktop-style.h" #include "desktop.h" #include "document-undo.h" #include "document.h" #include "message-stack.h" #include "mod360.h" #include "pure-transform.h" #include "selection-chemistry.h" #include "filter-chemistry.h" #include "selection.h" #include "seltrans-handles.h" #include "display/control/snap-indicator.h" #include "display/control/canvas-item-ctrl.h" #include "display/control/canvas-item-curve.h" #include "display/control/canvas-item-enums.h" #include "display/control/canvas-item-group.h" #include "live_effects/effect-enum.h" #include "live_effects/effect.h" #include "live_effects/lpe-bool.h" #include "object/sp-item-transform.h" #include "object/sp-namedview.h" #include "object/sp-root.h" #include "ui/icon-names.h" #include "ui/modifiers.h" #include "ui/knot/knot.h" #include "ui/tools/select-tool.h" using Inkscape::DocumentUndo; static void sp_sel_trans_handle_grab(SPKnot *knot, guint state, SPSelTransHandle const* data); static void sp_sel_trans_handle_ungrab(SPKnot *knot, guint state, SPSelTransHandle const* data); static void sp_sel_trans_handle_click(SPKnot *knot, guint state, SPSelTransHandle const* data); static void sp_sel_trans_handle_new_event(SPKnot *knot, Geom::Point const &position, guint32 state, SPSelTransHandle const* data); static gboolean sp_sel_trans_handle_request(SPKnot *knot, Geom::Point *p, guint state, SPSelTransHandle const *data); static gboolean sp_sel_trans_handle_event(SPKnot *knot, GdkEvent *event, SPSelTransHandle const*) { switch (event->type) { case GDK_MOTION_NOTIFY: break; case GDK_KEY_PRESS: if (Inkscape::UI::Tools::get_latin_keyval (&event->key) == GDK_KEY_space) { /* stamping mode: both mode(show content and outline) operation with knot */ if (!knot->is_grabbed()) { return FALSE; } SPDesktop *desktop = knot->desktop; Inkscape::SelTrans *seltrans = SP_SELECT_CONTEXT(desktop->event_context)->_seltrans; seltrans->stamp(); return TRUE; } break; default: break; } return FALSE; } Inkscape::SelTrans::BoundingBoxPrefsObserver::BoundingBoxPrefsObserver(SelTrans &sel_trans) : Observer("/tools/bounding_box"), _sel_trans(sel_trans) { } void Inkscape::SelTrans::BoundingBoxPrefsObserver::notify(Preferences::Entry const &val) { _sel_trans._boundingBoxPrefsChanged(static_cast(val.getBool())); } Inkscape::SelTrans::SelTrans(SPDesktop *desktop) : _desktop(desktop), _selcue(desktop), _state(STATE_SCALE), _show(SHOW_CONTENT), _bbox(), _stroked_bbox(), _message_context(desktop->messageStack()), _bounding_box_prefs_observer(*this) { Inkscape::Preferences *prefs = Inkscape::Preferences::get(); int prefs_bbox = prefs->getBool("/tools/bounding_box"); _snap_bbox_type = !prefs_bbox ? SPItem::VISUAL_BBOX : SPItem::GEOMETRIC_BBOX; g_return_if_fail(desktop != nullptr); _updateVolatileState(); _current_relative_affine.setIdentity(); _center_is_set = false; // reread _center from items, or set to bbox midpoint _makeHandles(); _updateHandles(); _selection = desktop->getSelection(); _norm = new CanvasItemCtrl(desktop->getCanvasControls(), Inkscape::CANVAS_ITEM_CTRL_TYPE_CENTER); _norm->set_fill(0x0); _norm->set_stroke(0xff0000b0); _norm->hide(); _grip = new CanvasItemCtrl(desktop->getCanvasControls(), Inkscape::CANVAS_ITEM_CTRL_TYPE_POINT); _grip->set_fill(0xffffff7f); _grip->set_stroke(0xff0000b0); _grip->hide(); for (auto & i : _l) { i = new Inkscape::CanvasItemCurve(desktop->getCanvasControls()); i->hide(); } _sel_changed_connection = _selection->connectChanged( sigc::mem_fun(*this, &Inkscape::SelTrans::_selChanged) ); _sel_modified_connection = _selection->connectModified( sigc::mem_fun(*this, &Inkscape::SelTrans::_selModified) ); _all_snap_sources_iter = _all_snap_sources_sorted.end(); prefs->addObserver(_bounding_box_prefs_observer); } Inkscape::SelTrans::~SelTrans() { _sel_changed_connection.disconnect(); _sel_modified_connection.disconnect(); for (auto & knot : knots) { knot_unref(knot); knot = nullptr; } if (_norm) { delete _norm; } if (_grip) { delete _grip; } for (auto & i : _l) { if (i) { delete i; } } if (_stamped) { for (auto old_obj :_stamp_cache) { SPLPEItem *oldLPEObj = dynamic_cast(old_obj); if (oldLPEObj) { sp_lpe_item_enable_path_effects(oldLPEObj,true); } } } for (auto & _item : _items) { sp_object_unref(_item, nullptr); } _items.clear(); _objects_const.clear(); _items_affines.clear(); _items_centers.clear(); } void Inkscape::SelTrans::resetState() { _state = STATE_SCALE; } void Inkscape::SelTrans::increaseState() { Inkscape::Preferences *prefs = Inkscape::Preferences::get(); bool show_align = prefs->getBool("/dialogs/align/oncanvas", false); if (_state == STATE_SCALE) { _state = STATE_ROTATE; } else if (_state == STATE_ROTATE && show_align) { _state = STATE_ALIGN; } else { _state = STATE_SCALE; } _center_is_set = true; // no need to reread center _updateHandles(); } void Inkscape::SelTrans::setCenter(Geom::Point const &p) { _center = p; _center_is_set = true; // Write the new center position into all selected items auto items= _desktop->selection->items(); for (auto it : items) { it->setCenter(p); // only set the value; updating repr and document_done will be done once, on ungrab } _updateHandles(); } void Inkscape::SelTrans::grab(Geom::Point const &p, gdouble x, gdouble y, bool show_handles, bool translating) { // While dragging a handle, we will either scale, skew, or rotate and the "translating" parameter will be false // When dragging the selected item itself however, we will translate the selection and that parameter will be true Inkscape::Selection *selection = _desktop->getSelection(); Inkscape::Preferences *prefs = Inkscape::Preferences::get(); g_return_if_fail(!_grabbed); _grabbed = true; _show_handles = show_handles; _updateVolatileState(); _current_relative_affine.setIdentity(); _changed = false; if (_empty) { return; } auto items= _desktop->selection->items(); for (auto iter=items.begin();iter!=items.end(); ++iter) { SPItem *it = static_cast(sp_object_ref(*iter, nullptr)); _items.push_back(it); _objects_const.push_back(it); _items_affines.push_back(it->i2dt_affine()); _items_centers.push_back(it->getCenter()); // for content-dragging, we need to remember original centers SPLPEItem *lpeitem = dynamic_cast(it); if (lpeitem && lpeitem->hasPathEffectRecursive()) { sp_lpe_item_update_patheffect(lpeitem, true, false); } } if (y != -1 && _desktop->is_yaxisdown()) { y = 1 - y; } _handle_x = x; _handle_y = y; // The selector tool should snap the bbox, special snappoints, and path nodes // (The special points are the handles, center, rotation axis, font baseline, ends of spiral, etc.) // First, determine the bounding box _bbox = selection->bounds(_snap_bbox_type); _stroked_bbox = selection->strokedBounds(); // Used for correctly scaling the strokewidth _geometric_bbox = selection->geometricBounds(); _point = p; if (_geometric_bbox) { _point_geom = _geometric_bbox->min() + _geometric_bbox->dimensions() * Geom::Scale(x, y); } else { _point_geom = p; } // Next, get all points to consider for snapping SnapManager const &m = _desktop->namedview->snap_manager; _snap_points.clear(); if (m.someSnapperMightSnap(false)) { // Only search for snap sources when really needed, to avoid unnecessary delays _snap_points = selection->getSnapPoints(&m.snapprefs); // This might take some time! } if (_snap_points.size() > 200 && !(prefs->getBool("/options/snapclosestonly/value", false))) { /* Snapping a huge number of nodes will take way too long, so limit the number of snappable nodes A typical user would rarely ever try to snap such a large number of nodes anyway, because (s)he would hardly be able to discern which node would be snapping */ std::cerr << "Warning: limit of 200 snap sources reached, some will be ignored" << std::endl; _snap_points.resize(200); // Unfortunately, by now we will have lost the font-baseline snappoints :-( } // Find bbox hulling all special points, which excludes stroke width. Here we need to include the // path nodes, for example because a rectangle which has been converted to a path doesn't have // any other special points Geom::OptRect snap_points_bbox = selection->bounds(SPItem::GEOMETRIC_BBOX); _bbox_points.clear(); // Collect the bounding box's corners and midpoints for each selected item if (m.snapprefs.isTargetSnappable(SNAPTARGET_BBOX_CATEGORY, SNAPTARGET_ALIGNMENT_CATEGORY, SNAPTARGET_DISTRIBUTION_CATEGORY)) { bool c = m.snapprefs.isTargetSnappable(SNAPTARGET_BBOX_CORNER, SNAPTARGET_ALIGNMENT_CATEGORY, SNAPTARGET_DISTRIBUTION_CATEGORY); bool mp = m.snapprefs.isTargetSnappable(SNAPTARGET_BBOX_MIDPOINT, SNAPTARGET_ALIGNMENT_CATEGORY, SNAPTARGET_DISTRIBUTION_CATEGORY); bool emp = m.snapprefs.isTargetSnappable(SNAPTARGET_BBOX_EDGE_MIDPOINT); // Preferably we'd use the bbox of each selected item, but for example 50 items will produce at least 200 bbox points, // which might make Inkscape crawl(see the comment a few lines above). In that case we will use the bbox of the selection as a whole bool c1 = (_items.size() > 0) && (_items.size() < 50); bool c2 = prefs->getBool("/options/snapclosestonly/value", false); if (translating && (c1 || c2)) { // Get the bounding box points for each item in the selection for (auto & _item : _items) { Geom::OptRect b = _item->desktopBounds(_snap_bbox_type); getBBoxPoints(b, &_bbox_points, false, c, emp, mp); } } else { // Only get the bounding box points of the selection as a whole getBBoxPoints(selection->bounds(_snap_bbox_type), &_bbox_points, false, c, emp, mp); } } if (_bbox) { // There are two separate "opposites" (i.e. opposite w.r.t. the handle being dragged): // - one for snapping the boundingbox, which can be either visual or geometric // - one for snapping the special points // The "opposite" in case of a geometric boundingbox always coincides with the "opposite" for the special points // These distinct "opposites" are needed in the snapmanager to avoid bugs such as LP167905 (in which // a box is caught between two guides) _opposite_for_bboxpoints = _bbox->min() + _bbox->dimensions() * Geom::Scale(1-x, 1-y); if (snap_points_bbox) { _opposite_for_specpoints = (*snap_points_bbox).min() + (*snap_points_bbox).dimensions() * Geom::Scale(1-x, 1-y); } else { _opposite_for_specpoints = _opposite_for_bboxpoints; } _opposite = _opposite_for_bboxpoints; } // When snapping the node closest to the mouse pointer is absolutely preferred over the closest snap // (i.e. when weight == 1), then we will not even try to snap to other points and disregard those other points if (prefs->getBool("/options/snapclosestonly/value", false)) { _keepClosestPointOnly(p); } if ((x != -1) && (y != -1)) { _norm->show(); _grip->show(); } if (_show == SHOW_OUTLINE) { for (auto & i : _l) i->show(); } _updateHandles(); g_return_if_fail(_stamp_cache.empty()); } void Inkscape::SelTrans::transform(Geom::Affine const &rel_affine, Geom::Point const &norm) { g_return_if_fail(_grabbed); g_return_if_fail(!_empty); Geom::Affine const affine( Geom::Translate(-norm) * rel_affine * Geom::Translate(norm) ); if (_show == SHOW_CONTENT) { auto selection = _desktop->getSelection(); // update the content for (unsigned i = 0; i < _items.size(); i++) { SPItem &item = *_items[i]; if( SP_IS_ROOT(&item) ) { _desktop->messageStack()->flash(Inkscape::WARNING_MESSAGE, _("Cannot transform an embedded SVG.")); break; } SiblingState sibling_state = selection->getSiblingState(&item); /** * Need checks for each SiblingState * Outside of SIBLING_TEXT_SHAPE_INSIDE and SIBLING_TEXT_PATH, * the rest of them need testing * This just skips the transformation */ if (sibling_state == SiblingState::SIBLING_TEXT_SHAPE_INSIDE || sibling_state == SiblingState::SIBLING_TEXT_PATH) { continue; } Geom::Affine const &prev_transform = _items_affines[i]; item.set_i2d_affine(prev_transform * affine); SPLPEItem *lpeitem = dynamic_cast(item.parent); if (lpeitem && lpeitem->hasPathEffectRecursive()) { sp_lpe_item_update_patheffect(lpeitem, true, false); } // The new affine will only have been applied if the transformation is different from the previous one, see SPItem::set_item_transform } } else { if (_bbox) { Geom::Point p[4]; /* update the outline */ for (unsigned i = 0 ; i < 4 ; i++) { p[i] = _bbox->corner(i) * affine; } for (unsigned i = 0 ; i < 4 ; i++) { _l[i]->set_coords(p[i], p[(i+1)%4]); } } } _current_relative_affine = affine; _changed = true; _updateHandles(); } void sp_meassure_lpe_update(SPLPEItem *item, bool root) { SPGroup *group = dynamic_cast(item); SPLPEItem *lpeitem = dynamic_cast(item); if (group) { std::vector l = group->childList(false); for(auto o : l){ SPLPEItem *olpeitem = dynamic_cast(o); if (olpeitem) { sp_meassure_lpe_update(olpeitem, false); } } } else if (!root && lpeitem && lpeitem->hasPathEffectOfType(Inkscape::LivePathEffect::EffectType::MEASURE_SEGMENTS)) { sp_lpe_item_update_patheffect(lpeitem, false, false); } } void Inkscape::SelTrans::ungrab() { g_return_if_fail(_grabbed); _grabbed = false; _show_handles = true; _desktop->snapindicator->remove_snapsource(); Inkscape::Selection *selection = _desktop->getSelection(); _updateVolatileState(); for (auto & _item : _items) { sp_object_unref(_item, nullptr); } _norm->hide(); _grip->hide(); if (_show == SHOW_OUTLINE) { for (auto & i : _l) i->hide(); } if (_stamped) { _stamped = false; for (auto old_obj :_stamp_cache) { SPLPEItem *oldLPEObj = dynamic_cast(old_obj); if (oldLPEObj) { sp_lpe_item_enable_path_effects(oldLPEObj,true); } } } if(!_stamp_cache.empty()){ _stamp_cache.clear(); } _message_context.clear(); if (!_empty && _changed) { if (!_current_relative_affine.isIdentity()) { // we can have a identity affine // when trying to stretch a perfectly vertical line in horizontal direction, which will not be allowed by the handles; selection->applyAffine(_current_relative_affine, (_show == SHOW_OUTLINE) ? true : false); if (_center) { *_center *= _current_relative_affine; _center_is_set = true; } // If dragging showed content live, sp_selection_apply_affine cannot change the centers // appropriately - it does not know the original positions of the centers (all objects already have // the new bboxes). So we need to reset the centers from our saved array. if (_show != SHOW_OUTLINE && !_current_relative_affine.isTranslation()) { for (unsigned i = 0; i < _items_centers.size(); i++) { SPItem *currentItem = _items[i]; if (currentItem->isCenterSet()) { // only if it's already set currentItem->setCenter (_items_centers[i] * _current_relative_affine); currentItem->updateRepr(); } } } for (unsigned i = 0; i < _items_centers.size(); i++) { SPLPEItem *currentItem = dynamic_cast(_items[i]); sp_meassure_lpe_update(currentItem, true); } } _items.clear(); _objects_const.clear(); _items_affines.clear(); _items_centers.clear(); if (!_current_relative_affine.isIdentity()) { // we can have a identity affine // when trying to stretch a perfectly vertical line in horizontal direction, which will not be allowed // by the handles; this would be identified as a (zero) translation by isTranslation() if (_current_relative_affine.isTranslation()) { DocumentUndo::done(_desktop->getDocument(), _("Move"), INKSCAPE_ICON("tool-pointer")); } else if (_current_relative_affine.withoutTranslation().isScale()) { DocumentUndo::done(_desktop->getDocument(), _("Scale"), INKSCAPE_ICON("tool-pointer")); } else if (_current_relative_affine.withoutTranslation().isRotation()) { DocumentUndo::done(_desktop->getDocument(), _("Rotate"), INKSCAPE_ICON("tool-pointer")); } else { DocumentUndo::done(_desktop->getDocument(), _("Skew"), INKSCAPE_ICON("tool-pointer")); } } else { _updateHandles(); } } else { if (_center_is_set) { // we were dragging center; update reprs and commit undoable action auto items= _desktop->selection->items(); for (auto iter=items.begin();iter!=items.end(); ++iter) { SPItem *it = *iter; it->updateRepr(); } DocumentUndo::done(_desktop->getDocument(), _("Set center"), INKSCAPE_ICON("tool-pointer")); } _items.clear(); _objects_const.clear(); _items_affines.clear(); _items_centers.clear(); _updateHandles(); } _desktop->snapindicator->remove_snaptarget(); } /* fixme: This is really bad, as we compare positions for each stamp (Lauris) */ /* fixme: IMHO the best way to keep sort cache would be to implement timestamping at last */ void Inkscape::SelTrans::stamp() { Inkscape::Selection *selection = _desktop->getSelection(); bool fixup = !_grabbed; if ( fixup && !_stamp_cache.empty() ) { // TODO - give a proper fix. Simple temporary work-around for the grab() issue _stamp_cache.clear(); } /* stamping mode */ if (!_empty) { _stamped = true; std::vector l; if (!_stamp_cache.empty()) { l = _stamp_cache; } else { /* Build cache */ l.insert(l.end(), selection->items().begin(), selection->items().end()); sort(l.begin(), l.end(), sp_object_compare_position_bool); _stamp_cache = l; // we disable LPE while stamping and reenable on ungrab with _stamped bool for (auto old_obj : l) { SPLPEItem *oldLPEObj = dynamic_cast(old_obj); if (oldLPEObj) { sp_lpe_item_enable_path_effects(oldLPEObj, false); } } } std::vector copies; // special case on clones when dragging a clone without its original // we check if its satellite is selected. if it has a clone original // to allow perform the write statement on line:616 bool lpewritetransforms = true; for (auto old_obj : l) { SPLPEItem *oldLPEObj = dynamic_cast(old_obj); if (oldLPEObj) { auto effect = oldLPEObj->getFirstPathEffectOfType(Inkscape::LivePathEffect::CLONE_ORIGINAL); if (effect) { std::vector satellites = effect->effect_get_satellites(); for (auto obj : satellites) { if (!selection->includes(obj)) { lpewritetransforms = false; } } } effect = oldLPEObj->getFirstPathEffectOfType(Inkscape::LivePathEffect::BEND_PATH); if (effect) { if (!oldLPEObj->optimizeTransforms() && selection->includes(oldLPEObj)) { lpewritetransforms = false; std::vector satellites = effect->effect_get_satellites(); for (auto obj : satellites) { if (selection->includes(obj)) { lpewritetransforms = true; } } } } } } for(auto &original_item : l) { Inkscape::XML::Node *original_repr = original_item->getRepr(); // remember parent Inkscape::XML::Node *parent = original_repr->parent(); Inkscape::XML::Node *copy_repr = original_repr->duplicate(parent->document()); // add the new repr to the parent parent->addChild(copy_repr, original_repr->prev()); SPItem *copy_item = (SPItem *) _desktop->getDocument()->getObjectByRepr(copy_repr); Geom::Affine const *new_affine; if (_show == SHOW_OUTLINE) { Geom::Affine const i2d(original_item->i2dt_affine()); Geom::Affine const i2dnew( i2d * _current_relative_affine ); copy_item->set_i2d_affine(i2dnew); new_affine = ©_item->transform; } else { new_affine = &original_item->transform; } original_item->setSuccessor(copy_item); SPLPEItem *newLPEObj = dynamic_cast(copy_item); if (newLPEObj) { // disable LPE bool on dowrite to prevent move of selection original satellite // when unselected (lpe performs a transform function that moves satellite and // on unselect, goes to the wrong place) if (newLPEObj->hasPathEffectOfType(Inkscape::LivePathEffect::BOOL_OP)) { sp_lpe_item_enable_path_effects(newLPEObj,false); } } if (!newLPEObj || !lpewritetransforms || (!newLPEObj->hasPathEffectOfType(Inkscape::LivePathEffect::CLONE_ORIGINAL) && !newLPEObj->hasPathEffectOfType(Inkscape::LivePathEffect::BEND_PATH))) { copy_item->doWriteTransform(*new_affine); if ( copy_item->isCenterSet() && _center ) { copy_item->setCenter(*_center * _current_relative_affine); } } Inkscape::GC::release(copy_repr); copies.push_back(copy_repr); } for (auto node : copies) { SPObject *new_obj = _desktop->getDocument()->getObjectByRepr(node); SPLPEItem *newLPEObj = dynamic_cast(new_obj); if (newLPEObj) { sp_lpe_item_enable_path_effects(newLPEObj,true); // we need 0 to force fork, we are sure we need new LPE and with // 1 sometimes (slice LPE) doesn't work newLPEObj->forkPathEffectsIfNecessary(0); sp_lpe_item_update_patheffect(newLPEObj, false, true); } } for(auto original_item : l) { // unrefering tmp _sucessor (not needed anymore) used on fork to keep new satellite // items forked along the LPEs if (original_item->_successor) { sp_object_unref(original_item->_successor, nullptr); original_item->_successor = nullptr; } } DocumentUndo::done(_desktop->getDocument(), _("Stamp"), INKSCAPE_ICON("tool-pointer")); } if ( fixup && !_stamp_cache.empty() ) { // TODO - give a proper fix. Simple temporary work-around for the grab() issue _stamp_cache.clear(); } } void Inkscape::SelTrans::_updateHandles() { for (auto & knot : knots) knot->hide(); if ( !_show_handles || _empty ) { _desktop->selection->setAnchor(0.0, 0.0, false); return; } if (!_center_is_set) { _center = _desktop->selection->center(); _center_is_set = true; } if ( _state == STATE_SCALE ) { _showHandles(HANDLE_STRETCH); _showHandles(HANDLE_SCALE); } else if(_state == STATE_ALIGN) { _showHandles(HANDLE_SIDE_ALIGN); _showHandles(HANDLE_CORNER_ALIGN); _showHandles(HANDLE_CENTER_ALIGN); } else { _showHandles(HANDLE_SKEW); _showHandles(HANDLE_ROTATE); _showHandles(HANDLE_CENTER); } // Set anchor point, 0.0 is always set if nothing is selected (top/left). bool set = false; for (int i = 0; i < NUMHANDS; i++) { if (knots[i]->is_selected()) { double anchor_x, anchor_y = 0.0; if (hands[i].type == HANDLE_CENTER) { anchor_x = (_center->x() - _bbox->min()[Geom::X]) / _bbox->dimensions()[Geom::X]; anchor_y = (_center->y() - _bbox->min()[Geom::Y]) / _bbox->dimensions()[Geom::Y]; } else { anchor_x = hands[i].x; anchor_y = (hands[i].y - 0.5) * (-_desktop->yaxisdir()) + 0.5; } set = true; _desktop->selection->setAnchor(anchor_x, anchor_y); } } if (!set) _desktop->selection->setAnchor(0.0, 0.0, false); } void Inkscape::SelTrans::_updateVolatileState() { Inkscape::Selection *selection = _desktop->getSelection(); _empty = selection->isEmpty(); if (_empty) { return; } //Update the bboxes _bbox = selection->bounds(_snap_bbox_type); _stroked_bbox = selection->strokedBounds(); if (!_bbox) { _empty = true; return; } std::vector vec(selection->items().begin(), selection->items().end()); _strokewidth = stroke_average_width(vec); } void Inkscape::SelTrans::_showHandles(SPSelTransType type) { // shouldn't have nullary bbox, but knots g_assert(_bbox); auto const y_dir = _desktop->yaxisdir(); for (int i = 0; i < NUMHANDS; i++) { if (hands[i].type != type) continue; // Position knots to scale the selection bbox Geom::Point const bpos(hands[i].x, (hands[i].y - 0.5) * (-y_dir) + 0.5); Geom::Point p(_bbox->min() + (_bbox->dimensions() * Geom::Scale(bpos))); knots[i]->moveto(p); knots[i]->show(); // This controls the center handle's position, because the default can // be moved and needs to be remembered. if( type == HANDLE_CENTER && _center ) knots[i]->moveto(*_center); } } void Inkscape::SelTrans::_makeHandles() { for (int i = 0; i < NUMHANDS; i++) { using Inkscape::Modifiers::Type; using Inkscape::Modifiers::Modifier; auto confine_mod = Modifier::get(Type::TRANS_CONFINE)->get_label(); auto center_mod = Modifier::get(Type::TRANS_OFF_CENTER)->get_label(); auto increment_mod = Modifier::get(Type::TRANS_INCREMENT)->get_label(); switch (hands[i].type) { case HANDLE_STRETCH: case HANDLE_SCALE: { auto tip = Glib::ustring::compose(_("Scale selection; with %1 to scale uniformly; with %2 to scale around rotation center"), confine_mod, center_mod); knots[i] = new SPKnot(_desktop, tip.c_str(), CANVAS_ITEM_CTRL_TYPE_ADJ_HANDLE, "SelTrans"); break; } case HANDLE_SKEW: { auto tip = Glib::ustring::compose(_("Skew selection; with %1 to snap angle; with %2 to skew around the opposite side"), increment_mod, center_mod); knots[i] = new SPKnot(_desktop, tip.c_str(), CANVAS_ITEM_CTRL_TYPE_ADJ_SKEW, "SelTrans"); break; } case HANDLE_ROTATE: { auto tip = Glib::ustring::compose(_("Rotate selection; with %1 to snap angle; with %2 to rotate around the opposite corner"), increment_mod, center_mod); knots[i] = new SPKnot(_desktop, tip.c_str(), CANVAS_ITEM_CTRL_TYPE_ADJ_ROTATE, "SelTrans"); break; } case HANDLE_CENTER: { auto tip = Glib::ustring::compose(_("Center of transformation: drag to reposition; scaling, rotation and skew with %1 also uses this center"), center_mod); knots[i] = new SPKnot(_desktop, tip.c_str(), CANVAS_ITEM_CTRL_TYPE_ADJ_CENTER, "SelTrans"); break; } case HANDLE_SIDE_ALIGN: knots[i] = new SPKnot(_desktop, _("Align objects to the side clicked; Shift click to invert side; Ctrl to group whole selection."), CANVAS_ITEM_CTRL_TYPE_ADJ_SALIGN, "SelTrans"); break; case HANDLE_CORNER_ALIGN: knots[i] = new SPKnot(_desktop, _("Align objects to the corner clicked; Shift click to invert side; Ctrl to group whole selection."), CANVAS_ITEM_CTRL_TYPE_ADJ_CALIGN, "SelTrans"); break; case HANDLE_CENTER_ALIGN: knots[i] = new SPKnot(_desktop, _("Align objects to center; Shift click to center vertically instead of horizontally."), CANVAS_ITEM_CTRL_TYPE_ADJ_MALIGN, "SelTrans"); break; default: knots[i] = new SPKnot(_desktop, "", CANVAS_ITEM_CTRL_TYPE_ADJ_HANDLE, "SelTrans"); } knots[i]->setAnchor(hands[i].anchor); knots[i]->setMode(CANVAS_ITEM_CTRL_MODE_DESATURATED_XOR); knots[i]->setFill(DEF_COLOR[0], DEF_COLOR[1], DEF_COLOR[1], DEF_COLOR[2]); knots[i]->setStroke(DEF_COLOR[3], DEF_COLOR[4], DEF_COLOR[4], DEF_COLOR[4]); knots[i]->updateCtrl(); knots[i]->request_signal.connect(sigc::bind(sigc::ptr_fun(sp_sel_trans_handle_request), &hands[i])); knots[i]->moved_signal.connect(sigc::bind(sigc::ptr_fun(sp_sel_trans_handle_new_event), &hands[i])); knots[i]->grabbed_signal.connect(sigc::bind(sigc::ptr_fun(sp_sel_trans_handle_grab), &hands[i])); knots[i]->ungrabbed_signal.connect(sigc::bind(sigc::ptr_fun(sp_sel_trans_handle_ungrab), &hands[i])); knots[i]->click_signal.connect(sigc::bind(sigc::ptr_fun(sp_sel_trans_handle_click), &hands[i])); knots[i]->event_signal.connect(sigc::bind(sigc::ptr_fun(sp_sel_trans_handle_event), &hands[i])); } } static void sp_sel_trans_handle_grab(SPKnot *knot, guint state, SPSelTransHandle const* data) { SP_SELECT_CONTEXT(knot->desktop->event_context)->_seltrans->handleGrab( knot, state, *(SPSelTransHandle const *) data ); } static void sp_sel_trans_handle_ungrab(SPKnot *knot, guint /*state*/, SPSelTransHandle const* /*data*/) { SP_SELECT_CONTEXT(knot->desktop->event_context)->_seltrans->ungrab(); } static void sp_sel_trans_handle_new_event(SPKnot *knot, Geom::Point const& position, guint state, SPSelTransHandle const *data) { Geom::Point pos = position; SP_SELECT_CONTEXT(knot->desktop->event_context)->_seltrans->handleNewEvent( knot, &pos, state, *(SPSelTransHandle const *) data ); } static gboolean sp_sel_trans_handle_request(SPKnot *knot, Geom::Point *position, guint state, SPSelTransHandle const *data) { return SP_SELECT_CONTEXT(knot->desktop->event_context)->_seltrans->handleRequest( knot, position, state, *(SPSelTransHandle const *) data ); } static void sp_sel_trans_handle_click(SPKnot *knot, guint state, SPSelTransHandle const* data) { SP_SELECT_CONTEXT(knot->desktop->event_context)->_seltrans->handleClick( knot, state, *(SPSelTransHandle const *) data ); } void Inkscape::SelTrans::handleClick(SPKnot *knot, guint state, SPSelTransHandle const &handle) { switch (handle.type) { case HANDLE_CENTER: if (state & GDK_SHIFT_MASK) { // Unset the center position for all selected items auto items = _desktop->selection->items(); for (auto iter=items.begin();iter!=items.end(); ++iter) { SPItem *it = *iter; it->unsetCenter(); it->updateRepr(); _center_is_set = false; // center has changed _updateHandles(); } DocumentUndo::done(_desktop->getDocument(), _("Reset center"), INKSCAPE_ICON("tool-pointer")); } // no break, continue. case HANDLE_STRETCH: case HANDLE_SCALE: { bool was_selected = knot->is_selected(); for (auto & child_knot : knots) { child_knot->selectKnot(false); } if (!was_selected) { knot->selectKnot(true); } _updateHandles(); } break; case HANDLE_SIDE_ALIGN: case HANDLE_CORNER_ALIGN: case HANDLE_CENTER_ALIGN: align(state, handle); default: break; } } void Inkscape::SelTrans::handleGrab(SPKnot *knot, guint /*state*/, SPSelTransHandle const &handle) { grab(knot->position(), handle.x, handle.y, FALSE, FALSE); // Forcing handles visibility must be done after grab() to be effective switch (handle.type) { case HANDLE_CENTER: _grip->set_shape(Inkscape::CANVAS_ITEM_CTRL_SHAPE_PLUS); _norm->hide(); _grip->show(); break; default: _grip->set_shape(Inkscape::CANVAS_ITEM_CTRL_SHAPE_CROSS); _norm->show(); _grip->show(); break; } } void Inkscape::SelTrans::handleNewEvent(SPKnot *knot, Geom::Point *position, guint state, SPSelTransHandle const &handle) { if (!knot->is_grabbed()) { return; } // in case items have been unhooked from the document, don't // try to continue processing events for them. for (auto & _item : _items) { if ( !_item->document ) { return; } } switch (handle.type) { case HANDLE_SCALE: scale(*position, state); break; case HANDLE_STRETCH: stretch(handle, *position, state); break; case HANDLE_SKEW: skew(handle, *position, state); break; case HANDLE_ROTATE: rotate(*position, state); break; case HANDLE_CENTER: setCenter(*position); break; case HANDLE_SIDE_ALIGN: case HANDLE_CORNER_ALIGN: case HANDLE_CENTER_ALIGN: break; } } gboolean Inkscape::SelTrans::handleRequest(SPKnot *knot, Geom::Point *position, guint state, SPSelTransHandle const &handle) { if (!knot->is_grabbed()) { return TRUE; } // When holding shift while rotating or skewing, the transformation will be // relative to the point opposite of the handle; otherwise it will be relative // to the center as set for the selection auto off_center = Modifiers::Modifier::get(Modifiers::Type::TRANS_OFF_CENTER)->active(state); if ((!off_center == !(_state == STATE_ROTATE)) && (handle.type != HANDLE_CENTER)) { _origin = _opposite; _origin_for_bboxpoints = _opposite_for_bboxpoints; _origin_for_specpoints = _opposite_for_specpoints; } else if (_center) { _origin = *_center; _origin_for_bboxpoints = *_center; _origin_for_specpoints = *_center; } else { // FIXME return TRUE; } if (request(handle, *position, state)) { knot->setPosition(*position, state); _grip->set_position(*position); if (handle.type == HANDLE_CENTER) { _norm->set_position(*position); } else { _norm->set_position(_origin); } } return TRUE; } void Inkscape::SelTrans::_selChanged(Inkscape::Selection */*selection*/) { if (!_grabbed) { Inkscape::Preferences *prefs = Inkscape::Preferences::get(); // reread in case it changed on the fly: int prefs_bbox = prefs->getBool("/tools/bounding_box"); _snap_bbox_type = !prefs_bbox ? SPItem::VISUAL_BBOX : SPItem::GEOMETRIC_BBOX; _updateVolatileState(); _current_relative_affine.setIdentity(); _center_is_set = false; // center(s) may have changed _updateHandles(); } } void Inkscape::SelTrans::_selModified(Inkscape::Selection */*selection*/, guint /*flags*/) { if (!_grabbed) { _updateVolatileState(); _current_relative_affine.setIdentity(); // reset internal flag _changed = false; _center_is_set = false; // center(s) may have changed _updateHandles(); } } void Inkscape::SelTrans::_boundingBoxPrefsChanged(int prefs_bbox) { _snap_bbox_type = !prefs_bbox ? SPItem::VISUAL_BBOX : SPItem::GEOMETRIC_BBOX; _updateVolatileState(); _updateHandles(); } /* * handlers for handle move-request */ /** Returns -1 or 1 according to the sign of x. Returns 1 for 0 and NaN. */ static double sign(double const x) { return ( x < 0 ? -1 : 1 ); } gboolean Inkscape::SelTrans::scaleRequest(Geom::Point &pt, guint state) { // Calculate the scale factors, which can be either visual or geometric // depending on which type of bbox is currently being used (see preferences -> selector tool) Geom::Scale default_scale = calcScaleFactors(_point, pt, _origin); // Find the scale factors for the geometric bbox Geom::Point pt_geom = _getGeomHandlePos(pt); Geom::Scale geom_scale = calcScaleFactors(_point_geom, pt_geom, _origin_for_specpoints); _absolute_affine = Geom::identity(); //Initialize the scaler auto increments = Modifiers::Modifier::get(Modifiers::Type::TRANS_INCREMENT)->active(state); if (increments) { // scale by an integer multiplier/divider // We're scaling either the visual or the geometric bbox here (see the comment above) for ( unsigned int i = 0 ; i < 2 ; i++ ) { if (fabs(default_scale[i]) > 1) { default_scale[i] = round(default_scale[i]); } else if (default_scale[i] != 0) { default_scale[i] = 1/round(1/(MIN(default_scale[i], 10))); } } // Update the knot position pt = _calcAbsAffineDefault(default_scale); // When scaling by an integer, snapping is not needed } else { // In all other cases we should try to snap now Inkscape::PureScale *bb, *sn; auto confine = Modifiers::Modifier::get(Modifiers::Type::TRANS_CONFINE)->active(state); if (confine || _desktop->isToolboxButtonActive ("lock")) { // Scale is locked to a 1:1 aspect ratio, so that s[X] must be made to equal s[Y]. // // The aspect-ratio must be locked before snapping if (fabs(default_scale[Geom::X]) > fabs(default_scale[Geom::Y])) { default_scale[Geom::X] = fabs(default_scale[Geom::Y]) * sign(default_scale[Geom::X]); geom_scale[Geom::X] = fabs(geom_scale[Geom::Y]) * sign(geom_scale[Geom::X]); } else { default_scale[Geom::Y] = fabs(default_scale[Geom::X]) * sign(default_scale[Geom::Y]); geom_scale[Geom::Y] = fabs(geom_scale[Geom::X]) * sign(geom_scale[Geom::Y]); } // Snap along a suitable constraint vector from the origin. bb = new Inkscape::PureScaleConstrained(default_scale, _origin_for_bboxpoints); sn = new Inkscape::PureScaleConstrained(geom_scale, _origin_for_specpoints); } else { /* Scale aspect ratio is unlocked */ bb = new Inkscape::PureScale(default_scale, _origin_for_bboxpoints, false); sn = new Inkscape::PureScale(geom_scale, _origin_for_specpoints, false); } SnapManager &m = _desktop->namedview->snap_manager; m.setup(_desktop, false, _objects_const); m.snapTransformed(_bbox_points, _point, (*bb)); m.snapTransformed(_snap_points, _point, (*sn)); m.unSetup(); // These lines below are duplicated in stretchRequest //TODO: Eliminate this code duplication if (bb->best_snapped_point.getSnapped() || sn->best_snapped_point.getSnapped()) { if (bb->best_snapped_point.getSnapped() && !bb->best_snapped_point.isOtherSnapBetter(sn->best_snapped_point, false)) { // We snapped the bbox (which is either visual or geometric) _desktop->snapindicator->set_new_snaptarget(bb->best_snapped_point); default_scale = bb->getScaleSnapped(); // Calculate the new transformation and update the handle position pt = _calcAbsAffineDefault(default_scale); } else if (sn->best_snapped_point.getSnapped()) { _desktop->snapindicator->set_new_snaptarget(sn->best_snapped_point); // We snapped the special points (e.g. nodes), which are not at the visual bbox // The handle location however (pt) might however be at the visual bbox, so we // will have to calculate pt taking the stroke width into account geom_scale = sn->getScaleSnapped(); pt = _calcAbsAffineGeom(geom_scale); } } else { // We didn't snap at all! Don't update the handle position, just calculate the new transformation _calcAbsAffineDefault(default_scale); _desktop->snapindicator->remove_snaptarget(); } delete bb; delete sn; } /* Status text */ auto confine_mod = Modifiers::Modifier::get(Modifiers::Type::TRANS_CONFINE)->get_label(); _message_context.setF(Inkscape::IMMEDIATE_MESSAGE, _("Scale: %0.2f%% x %0.2f%%; with %s to lock ratio"), 100 * _absolute_affine[0], 100 * _absolute_affine[3], confine_mod.c_str()); return TRUE; } gboolean Inkscape::SelTrans::stretchRequest(SPSelTransHandle const &handle, Geom::Point &pt, guint state) { Geom::Dim2 axis, perp; switch (handle.cursor) { case GDK_TOP_SIDE: case GDK_BOTTOM_SIDE: axis = Geom::Y; perp = Geom::X; break; case GDK_LEFT_SIDE: case GDK_RIGHT_SIDE: axis = Geom::X; perp = Geom::Y; break; default: g_assert_not_reached(); return TRUE; }; // Calculate the scale factors, which can be either visual or geometric // depending on which type of bbox is currently being used (see preferences -> selector tool) Geom::Scale default_scale = calcScaleFactors(_point, pt, _origin); default_scale[perp] = 1; // Find the scale factors for the geometric bbox Geom::Point pt_geom = _getGeomHandlePos(pt); Geom::Scale geom_scale = calcScaleFactors(_point_geom, pt_geom, _origin_for_specpoints); geom_scale[perp] = 1; _absolute_affine = Geom::identity(); //Initialize the scaler auto increments = Modifiers::Modifier::get(Modifiers::Type::TRANS_INCREMENT)->active(state); if (increments) { // stretch by an integer multiplier/divider if (fabs(default_scale[axis]) > 1) { default_scale[axis] = round(default_scale[axis]); } else if (default_scale[axis] != 0) { default_scale[axis] = 1/round(1/(MIN(default_scale[axis], 10))); } // Calculate the new transformation and update the handle position pt = _calcAbsAffineDefault(default_scale); // When stretching by an integer, snapping is not needed } else { // In all other cases we should try to snap now SnapManager &m = _desktop->namedview->snap_manager; m.setup(_desktop, false, _objects_const); auto confine = Modifiers::Modifier::get(Modifiers::Type::TRANS_CONFINE)->active(state); Inkscape::PureStretchConstrained bb = Inkscape::PureStretchConstrained(Geom::Coord(default_scale[axis]), _origin_for_bboxpoints, Geom::Dim2(axis), confine); Inkscape::PureStretchConstrained sn = Inkscape::PureStretchConstrained(Geom::Coord(geom_scale[axis]), _origin_for_specpoints, Geom::Dim2(axis), confine); m.snapTransformed(_bbox_points, _point, bb); m.snapTransformed(_snap_points, _point, sn); m.unSetup(); if (bb.best_snapped_point.getSnapped()) { // We snapped the bbox (which is either visual or geometric) default_scale[axis] = bb.getMagnitude(); } if (sn.best_snapped_point.getSnapped()) { geom_scale[axis] = sn.getMagnitude(); } if (confine) { // on scale_confine, apply symmetrical scaling instead of stretching // Preserve aspect ratio, but never flip in the dimension not being edited (by using fabs()) default_scale[perp] = fabs(default_scale[axis]); geom_scale[perp] = fabs(geom_scale[axis]); } // These lines below are duplicated in scaleRequest if (bb.best_snapped_point.getSnapped() || sn.best_snapped_point.getSnapped()) { if (bb.best_snapped_point.getSnapped() && !bb.best_snapped_point.isOtherSnapBetter(sn.best_snapped_point, false)) { // We snapped the bbox (which is either visual or geometric) _desktop->snapindicator->set_new_snaptarget(bb.best_snapped_point); default_scale = bb.getStretchSnapped(); // Calculate the new transformation and update the handle position pt = _calcAbsAffineDefault(default_scale); } else if (sn.best_snapped_point.getSnapped()) { _desktop->snapindicator->set_new_snaptarget(sn.best_snapped_point); // We snapped the special points (e.g. nodes), which are not at the visual bbox // The handle location however (pt) might however be at the visual bbox, so we // will have to calculate pt taking the stroke width into account geom_scale = sn.getStretchSnapped(); pt = _calcAbsAffineGeom(geom_scale); } } else { // We didn't snap at all! Don't update the handle position, just calculate the new transformation _calcAbsAffineDefault(default_scale); _desktop->snapindicator->remove_snaptarget(); } } // status text auto confine_mod = Modifiers::Modifier::get(Modifiers::Type::TRANS_CONFINE)->get_label(); _message_context.setF(Inkscape::IMMEDIATE_MESSAGE, _("Scale: %0.2f%% x %0.2f%%; with %s to lock ratio"), 100 * _absolute_affine[0], 100 * _absolute_affine[3], confine_mod.c_str()); return TRUE; } gboolean Inkscape::SelTrans::request(SPSelTransHandle const &handle, Geom::Point &pt, guint state) { // These _should_ be in the handstype somewhere instead switch (handle.type) { case HANDLE_SCALE: return scaleRequest(pt, state); case HANDLE_STRETCH: return stretchRequest(handle, pt, state); case HANDLE_SKEW: return skewRequest(handle, pt, state); case HANDLE_ROTATE: return rotateRequest(pt, state); case HANDLE_CENTER: return centerRequest(pt, state); case HANDLE_SIDE_ALIGN: case HANDLE_CORNER_ALIGN: case HANDLE_CENTER_ALIGN: break; // Do nothing, no dragging } return FALSE; } gboolean Inkscape::SelTrans::skewRequest(SPSelTransHandle const &handle, Geom::Point &pt, guint state) { /* When skewing (or rotating): * 1) the stroke width will not change. This makes life much easier because we don't have to * account for that (like for scaling or stretching). As a consequence, all points will * have the same origin for the transformation and for the snapping. * 2) When holding shift, the transformation will be relative to the point opposite of * the handle; otherwise it will be relative to the center as set for the selection */ Geom::Dim2 dim_a; Geom::Dim2 dim_b; switch (handle.cursor) { case GDK_SB_H_DOUBLE_ARROW: dim_a = Geom::Y; dim_b = Geom::X; break; case GDK_SB_V_DOUBLE_ARROW: dim_a = Geom::X; dim_b = Geom::Y; break; default: g_assert_not_reached(); abort(); break; } // _point and _origin are noisy, ranging from 1 to 1e-9 or even smaller; this is due to the // limited SVG output precision, which can be arbitrarily set in the preferences Geom::Point const initial_delta = _point - _origin; // The handle and the origin shouldn't be too close to each other; let's check for that! // Due to the limited resolution though (see above), we'd better use a relative error here if (_bbox) { Geom::Coord d = (*_bbox).dimensions()[dim_a]; if (fabs(initial_delta[dim_a]/d) < 1e-4) { return false; } } // Calculate the scale factors, which can be either visual or geometric // depending on which type of bbox is currently being used (see preferences -> selector tool) Geom::Scale scale = calcScaleFactors(_point, pt, _origin, false); Geom::Scale skew = calcScaleFactors(_point, pt, _origin, true); scale[dim_b] = 1; skew[dim_b] = 1; if (fabs(scale[dim_a]) < 1) { // Prevent shrinking of the selected object, while allowing mirroring scale[dim_a] = sign(scale[dim_a]); } else { // Allow expanding of the selected object by integer multiples scale[dim_a] = floor(scale[dim_a] + 0.5); } double radians = atan(skew[dim_a] / scale[dim_a]); auto increments = Modifiers::Modifier::get(Modifiers::Type::TRANS_INCREMENT)->active(state); if (increments) { Inkscape::Preferences *prefs = Inkscape::Preferences::get(); // Snap to defined angle increments int snaps = prefs->getInt("/options/rotationsnapsperpi/value", 12); if (snaps) { double sections = floor(radians * snaps / M_PI + .5); if (fabs(sections) >= snaps / 2) { sections = sign(sections) * (snaps / 2 - 1); } radians = (M_PI / snaps) * sections; } skew[dim_a] = tan(radians) * scale[dim_a]; } else { // Snap to objects, grids, guides SnapManager &m = _desktop->namedview->snap_manager; m.setup(_desktop, false, _objects_const); // When skewing, we cannot snap the corners of the bounding box, see the comment in PureSkewConstrained for details Inkscape::PureSkewConstrained sn = Inkscape::PureSkewConstrained(skew[dim_a], scale[dim_a], _origin, Geom::Dim2(dim_b)); m.snapTransformed(_snap_points, _point, sn); if (sn.best_snapped_point.getSnapped()) { // We snapped something, so change the skew to reflect it skew[dim_a] = sn.getSkewSnapped(); _desktop->snapindicator->set_new_snaptarget(sn.best_snapped_point); } else { _desktop->snapindicator->remove_snaptarget(); } m.unSetup(); } // Update the handle position pt[dim_b] = initial_delta[dim_a] * skew[dim_a] + _point[dim_b]; pt[dim_a] = initial_delta[dim_a] * scale[dim_a] + _origin[dim_a]; // Calculate the relative affine _relative_affine = Geom::identity(); _relative_affine[2*dim_a + dim_a] = (pt[dim_a] - _origin[dim_a]) / initial_delta[dim_a]; _relative_affine[2*dim_a + (dim_b)] = (pt[dim_b] - _point[dim_b]) / initial_delta[dim_a]; _relative_affine[2*(dim_b) + (dim_a)] = 0; _relative_affine[2*(dim_b) + (dim_b)] = 1; for (int i = 0; i < 2; i++) { if (fabs(_relative_affine[3*i]) < 1e-15) { _relative_affine[3*i] = 1e-15; } } // Update the status text auto increment_mod = Modifiers::Modifier::get(Modifiers::Type::TRANS_INCREMENT)->get_label(); double degrees = mod360symm(Geom::deg_from_rad(radians)); _message_context.setF(Inkscape::IMMEDIATE_MESSAGE, // TRANSLATORS: don't modify the first ";" // (it will NOT be displayed as ";" - only the second one will be) _("Skew: %0.2f°; with %s to snap angle"), degrees, increment_mod.c_str()); return TRUE; } gboolean Inkscape::SelTrans::rotateRequest(Geom::Point &pt, guint state) { /* When rotating (or skewing): * 1) the stroke width will not change. This makes life much easier because we don't have to * account for that (like for scaling or stretching). As a consequence, all points will * have the same origin for the transformation and for the snapping. * 2) When holding shift, the transformation will be relative to the point opposite of * the handle; otherwise it will be relative to the center as set for the selection */ Inkscape::Preferences *prefs = Inkscape::Preferences::get(); int snaps = prefs->getInt("/options/rotationsnapsperpi/value", 12); // rotate affine in rotate Geom::Point const d1 = _point - _origin; Geom::Point const d2 = pt - _origin; Geom::Coord const h1 = Geom::L2(d1); // initial radius if (h1 < 1e-15) return FALSE; Geom::Point q1 = d1 / h1; // normalized initial vector to handle Geom::Coord const h2 = Geom::L2(d2); // new radius if (fabs(h2) < 1e-15) return FALSE; Geom::Point q2 = d2 / h2; // normalized new vector to handle Geom::Rotate r1(q1); Geom::Rotate r2(q2); double radians = atan2(Geom::dot(Geom::rot90(d1), d2), Geom::dot(d1, d2));; auto increments = Modifiers::Modifier::get(Modifiers::Type::TRANS_INCREMENT)->active(state); auto confine = Modifiers::Modifier::get(Modifiers::Type::TRANS_CONFINE)->active(state); // Either key will now snap the rotation to specific points if (increments || confine) { // Snap to defined angle increments double cos_t = Geom::dot(q1, q2); double sin_t = Geom::dot(Geom::rot90(q1), q2); radians = atan2(sin_t, cos_t); if (snaps) { radians = ( M_PI / snaps ) * floor( radians * snaps / M_PI + .5 ); } r1 = Geom::Rotate(0); //q1 = Geom::Point(1, 0); r2 = Geom::Rotate(radians); //q2 = Geom::Point(cos(radians), sin(radians)); } else { SnapManager &m = _desktop->namedview->snap_manager; m.setup(_desktop, false, _objects_const); // When rotating, we cannot snap the corners of the bounding box, see the comment in "constrainedSnapRotate" for details Inkscape::PureRotateConstrained sn = Inkscape::PureRotateConstrained(radians, _origin); m.snapTransformed(_snap_points, _point, sn); m.unSetup(); if (sn.best_snapped_point.getSnapped()) { _desktop->snapindicator->set_new_snaptarget(sn.best_snapped_point); // We snapped something, so change the rotation to reflect it radians = sn.getAngleSnapped(); r1 = Geom::Rotate(0); r2 = Geom::Rotate(radians); } else { _desktop->snapindicator->remove_snaptarget(); } } // Calculate the relative affine _relative_affine = r2 * r1.inverse(); // Update the handle position pt = _point * Geom::Translate(-_origin) * _relative_affine * Geom::Translate(_origin); // Update the status text auto increment_mod = Modifiers::Modifier::get(Modifiers::Type::TRANS_INCREMENT)->get_label(); double degrees = mod360symm(Geom::deg_from_rad(radians)); _message_context.setF(Inkscape::IMMEDIATE_MESSAGE, // TRANSLATORS: don't modify the first ";" // (it will NOT be displayed as ";" - only the second one will be) _("Rotate: %0.2f°; with %s to snap angle"), degrees, increment_mod.c_str()); return TRUE; } // Move the item's transformation center gboolean Inkscape::SelTrans::centerRequest(Geom::Point &pt, guint state) { // When dragging the transformation center while multiple items have been selected, then those // items will share a single center. While dragging that single center, it should never snap to the // centers of any of the selected objects. Therefore we will have to pass the list of selected items // to the snapper, to avoid self-snapping of the rotation center std::vector items(_selection->items().begin(), _selection->items().end()); SnapManager &m = _desktop->namedview->snap_manager; m.setup(_desktop); m.setRotationCenterSource(items); auto no_snap = Modifiers::Modifier::get(Modifiers::Type::MOVE_SNAPPING)->active(state); auto confine = Modifiers::Modifier::get(Modifiers::Type::MOVE_CONFINE)->active(state); if (confine) { std::vector constraints; constraints.emplace_back(_point, Geom::Point(1, 0)); constraints.emplace_back(_point, Geom::Point(0, 1)); Inkscape::SnappedPoint sp = m.multipleConstrainedSnaps(Inkscape::SnapCandidatePoint(pt, Inkscape::SNAPSOURCE_ROTATION_CENTER), constraints, no_snap); pt = sp.getPoint(); } else if (!no_snap) { m.freeSnapReturnByRef(pt, Inkscape::SNAPSOURCE_ROTATION_CENTER); } m.unSetup(); // status text Inkscape::Util::Quantity x_q = Inkscape::Util::Quantity(pt[Geom::X], "px"); Inkscape::Util::Quantity y_q = Inkscape::Util::Quantity(pt[Geom::Y], "px"); Glib::ustring xs(x_q.string(_desktop->namedview->display_units)); Glib::ustring ys(y_q.string(_desktop->namedview->display_units)); _message_context.setF(Inkscape::NORMAL_MESSAGE, _("Move center to %s, %s"), xs.c_str(), ys.c_str()); return TRUE; } void Inkscape::SelTrans::align(guint state, SPSelTransHandle const &handle) { Glib::ustring argument; int index = handle.control + ALIGN_OFFSET + ((state & GDK_SHIFT_MASK) ? ALIGN_SHIFT_OFFSET : 0); if (index < 0 || index >= AlignArguments.size()) { std::cerr << "Inkscape::Seltrans::align: index out of bounds! " << index << std::endl; index = 0; } auto variant = Glib::Variant::create(AlignArguments[index]); auto app = Gio::Application::get_default(); app->activate_action("object-align", variant); } /* * handlers for handle movement * */ void Inkscape::SelTrans::stretch(SPSelTransHandle const &/*handle*/, Geom::Point &/*pt*/, guint /*state*/) { transform(_absolute_affine, Geom::Point(0, 0)); // we have already accounted for origin, so pass 0,0 } void Inkscape::SelTrans::scale(Geom::Point &/*pt*/, guint /*state*/) { transform(_absolute_affine, Geom::Point(0, 0)); // we have already accounted for origin, so pass 0,0 } void Inkscape::SelTrans::skew(SPSelTransHandle const &/*handle*/, Geom::Point &/*pt*/, guint /*state*/) { transform(_relative_affine, _origin); } void Inkscape::SelTrans::rotate(Geom::Point &/*pt*/, guint /*state*/) { transform(_relative_affine, _origin); } void Inkscape::SelTrans::moveTo(Geom::Point const &xy, guint state) { SnapManager &m = _desktop->namedview->snap_manager; /* The amount that we've moved by during this drag */ Geom::Point dxy = xy - _point; auto increments = Modifiers::Modifier::get(Modifiers::Type::MOVE_INCREMENT)->active(state); auto no_snap = Modifiers::Modifier::get(Modifiers::Type::MOVE_SNAPPING)->active(state); auto confine = Modifiers::Modifier::get(Modifiers::Type::MOVE_CONFINE)->active(state); if (confine) { if (fabs(dxy[Geom::X]) > fabs(dxy[Geom::Y])) { dxy[Geom::Y] = 0; } else { dxy[Geom::X] = 0; } } if (increments) {// Alt pressed means: move only by integer multiples of the grid spacing m.setup(_desktop, true, _objects_const); dxy = m.multipleOfGridPitch(dxy, _point); m.unSetup(); } else if (!no_snap) { /* We're snapping to things, possibly with a constraint to horizontal or ** vertical movement. Obtain a list of possible translations and then ** pick the smallest. */ m.setup(_desktop, false, _objects_const); /* This will be our list of possible translations */ std::list s; Inkscape::PureTranslate *bb, *sn; if (confine) { // constrained movement with snapping /* Snap to things, and also constrain to horizontal or vertical movement */ Geom::Dim2 dim = fabs(dxy[Geom::X]) > fabs(dxy[Geom::Y]) ? Geom::X : Geom::Y; // When doing a constrained translation, all points will move in the same direction, i.e. // either horizontally or vertically. Therefore we only have to specify the direction of // the constraint-line once. The constraint lines are parallel, but might not be colinear. // Therefore we will have to set the point through which the constraint-line runs // individually for each point to be snapped; this will be handled however by snapTransformed() bb = new Inkscape::PureTranslateConstrained(dxy[dim], dim); sn = new Inkscape::PureTranslateConstrained(dxy[dim], dim); } else { /* Snap to things with no constraint */ bb = new Inkscape::PureTranslate(dxy); sn = new Inkscape::PureTranslate(dxy); } // Let's leave this timer code here for a while. I'll probably need it in the near future (Diederik van Lierop) /* GTimeVal starttime; GTimeVal endtime; g_get_current_time(&starttime); */ m.snapTransformed(_bbox_points, _point, (*bb)); m.snapTransformed(_snap_points, _point, (*sn)); m.unSetup(); /*g_get_current_time(&endtime); double elapsed = ((((double)endtime.tv_sec - starttime.tv_sec) * G_USEC_PER_SEC + (endtime.tv_usec - starttime.tv_usec))) / 1000.0; std::cout << "Time spent snapping: " << elapsed << std::endl; */ /* Pick one */ Inkscape::SnappedPoint best_snapped_point; bool sn_is_best = sn->best_snapped_point.getSnapped(); bool bb_is_best = bb->best_snapped_point.getSnapped(); if (bb_is_best && sn_is_best) { sn_is_best = bb->best_snapped_point.isOtherSnapBetter(sn->best_snapped_point, true); bb_is_best = !sn_is_best; } if (sn_is_best) { best_snapped_point = sn->best_snapped_point; dxy = sn->getTranslationSnapped(); } else if (bb_is_best) { best_snapped_point = bb->best_snapped_point; dxy = bb->getTranslationSnapped(); } if (best_snapped_point.getSnapped()) { _desktop->snapindicator->set_new_snaptarget(best_snapped_point); } else { // We didn't snap, so remove any previous snap indicator _desktop->snapindicator->remove_snaptarget(); if (confine) { // If we didn't snap, then we should still constrain horizontally or vertically // (When we did snap, then this constraint has already been enforced by // calling constrainedSnapTranslate() above) if (fabs(dxy[Geom::X]) > fabs(dxy[Geom::Y])) { dxy[Geom::Y] = 0; } else { dxy[Geom::X] = 0; } } } delete bb; delete sn; } Geom::Affine const move((Geom::Translate(dxy))); Geom::Point const norm(0, 0); transform(move, norm); // status text auto confine_mod = Modifiers::Modifier::get(Modifiers::Type::MOVE_CONFINE)->get_label(); auto no_snap_mod = Modifiers::Modifier::get(Modifiers::Type::MOVE_SNAPPING)->get_label(); Inkscape::Util::Quantity x_q = Inkscape::Util::Quantity(dxy[Geom::X], "px"); Inkscape::Util::Quantity y_q = Inkscape::Util::Quantity(dxy[Geom::Y], "px"); Glib::ustring xs(x_q.string(_desktop->namedview->display_units)); Glib::ustring ys(y_q.string(_desktop->namedview->display_units)); _message_context.setF(Inkscape::NORMAL_MESSAGE, _("Move by %s, %s; with %s to restrict to horizontal/vertical; with %s to disable snapping"), xs.c_str(), ys.c_str(), confine_mod.c_str(), no_snap_mod.c_str()); } // Given a location of a handle at the visual bounding box, find the corresponding location at the // geometrical bounding box Geom::Point Inkscape::SelTrans::_getGeomHandlePos(Geom::Point const &visual_handle_pos) { if ( _snap_bbox_type == SPItem::GEOMETRIC_BBOX) { // When the selector tool is using geometric bboxes, then the handle is already // located at one of the geometric bbox corners return visual_handle_pos; } if (!_geometric_bbox) { //_getGeomHandlePos() can only be used after _geometric_bbox has been defined! return visual_handle_pos; } // Using the Geom::Rect constructor below ensures that "min() < max()", which is important // because this will also hold for _bbox, and which is required for get_scale_transform_for_stroke() Geom::Rect new_bbox = Geom::Rect(_origin_for_bboxpoints, visual_handle_pos); // new visual bounding box // Please note that the new_bbox might in fact be just a single line, for example when stretching (in // which case the handle and origin will be aligned vertically or horizontally) Geom::Point normalized_handle_pos = (visual_handle_pos - new_bbox.min()) * Geom::Scale(new_bbox.dimensions()).inverse(); // Calculate the absolute affine while taking into account the scaling of the stroke width Inkscape::Preferences *prefs = Inkscape::Preferences::get(); bool transform_stroke = prefs->getBool("/options/transform/stroke", true); bool preserve = prefs->getBool("/options/preservetransform/value", false); Geom::Affine abs_affine = get_scale_transform_for_uniform_stroke (*_bbox, _strokewidth, _strokewidth, transform_stroke, preserve, new_bbox.min()[Geom::X], new_bbox.min()[Geom::Y], new_bbox.max()[Geom::X], new_bbox.max()[Geom::Y]); // Calculate the scaled geometrical bbox Geom::Rect new_geom_bbox = Geom::Rect(_geometric_bbox->min() * abs_affine, _geometric_bbox->max() * abs_affine); // Find the location of the handle on this new geometrical bbox return normalized_handle_pos * Geom::Scale(new_geom_bbox.dimensions()) + new_geom_bbox.min(); //new position of the geometric handle } Geom::Scale Inkscape::calcScaleFactors(Geom::Point const &initial_point, Geom::Point const &new_point, Geom::Point const &origin, bool const skew) { // Work out the new scale factors for the bbox Geom::Point const initial_delta = initial_point - origin; Geom::Point const new_delta = new_point - origin; Geom::Point const offset = new_point - initial_point; Geom::Scale scale(1, 1); for ( unsigned int i = 0 ; i < 2 ; i++ ) { if ( fabs(initial_delta[i]) > 1e-6 ) { if (skew) { scale[i] = offset[1-i] / initial_delta[i]; } else { scale[i] = new_delta[i] / initial_delta[i]; } } } return scale; } // Only for scaling/stretching Geom::Point Inkscape::SelTrans::_calcAbsAffineDefault(Geom::Scale const default_scale) { Geom::Affine abs_affine = Geom::Translate(-_origin) * Geom::Affine(default_scale) * Geom::Translate(_origin); Geom::Point new_bbox_min = _stroked_bbox->min() * abs_affine; Geom::Point new_bbox_max = _stroked_bbox->max() * abs_affine; bool transform_stroke = false; bool preserve = false; gdouble stroke_x = 0; gdouble stroke_y = 0; if ( _snap_bbox_type != SPItem::GEOMETRIC_BBOX) { Inkscape::Preferences *prefs = Inkscape::Preferences::get(); transform_stroke = prefs->getBool("/options/transform/stroke", true); preserve = prefs->getBool("/options/preservetransform/value", false); stroke_x = _stroked_bbox->width() - _geometric_bbox->width(); stroke_y = _stroked_bbox->height() - _geometric_bbox->height(); } _absolute_affine = get_scale_transform_for_uniform_stroke (*_stroked_bbox, stroke_x, stroke_y, transform_stroke, preserve, new_bbox_min[Geom::X], new_bbox_min[Geom::Y], new_bbox_max[Geom::X], new_bbox_max[Geom::Y]); // return the new handle position return ( _point - _origin ) * default_scale + _origin; } // Only for scaling/stretching Geom::Point Inkscape::SelTrans::_calcAbsAffineGeom(Geom::Scale const geom_scale) { _relative_affine = Geom::Affine(geom_scale); _absolute_affine = Geom::Translate(-_origin_for_specpoints) * _relative_affine * Geom::Translate(_origin_for_specpoints); Inkscape::Preferences *prefs = Inkscape::Preferences::get(); bool const transform_stroke = prefs->getBool("/options/transform/stroke", true); if (_geometric_bbox) { Geom::Rect visual_bbox = get_visual_bbox(_geometric_bbox, _absolute_affine, _strokewidth, transform_stroke); // return the new handle position return visual_bbox.min() + visual_bbox.dimensions() * Geom::Scale(_handle_x, _handle_y); } // Fall back scenario, in case we don't have a geometric bounding box at hand; // (Due to some bugs related to bounding boxes having at least one zero dimension; For more details // see https://bugs.launchpad.net/inkscape/+bug/318726) g_warning("No geometric bounding box has been calculated; this is a bug that needs fixing!"); return _calcAbsAffineDefault(geom_scale); // this is bogus, but we must return _something_ } void Inkscape::SelTrans::_keepClosestPointOnly(Geom::Point const &p) { SnapManager const &m = _desktop->namedview->snap_manager; // If we're not going to snap nodes, then we might just as well get rid of their snappoints right away if (!(m.snapprefs.isTargetSnappable(SNAPTARGET_NODE_CATEGORY, SNAPTARGET_OTHERS_CATEGORY) || m.snapprefs.isAnyDatumSnappable())) { _snap_points.clear(); } // If we're not going to snap bounding boxes, then we might just as well get rid of their snappoints right away if (!m.snapprefs.isTargetSnappable(SNAPTARGET_BBOX_CATEGORY) && !m.snapprefs.isTargetSnappable(SNAPTARGET_ALIGNMENT_CATEGORY)) { _bbox_points.clear(); } _all_snap_sources_sorted = _snap_points; _all_snap_sources_sorted.insert(_all_snap_sources_sorted.end(), _bbox_points.begin(), _bbox_points.end()); // Calculate and store the distance to the reference point for each snap candidate point for(auto & i : _all_snap_sources_sorted) { i.setDistance(Geom::L2(i.getPoint() - p)); } // Sort them ascending, using the distance calculated above as the single criteria std::sort(_all_snap_sources_sorted.begin(), _all_snap_sources_sorted.end()); // Now get the closest snap source _snap_points.clear(); _bbox_points.clear(); if (!_all_snap_sources_sorted.empty()) { _all_snap_sources_iter = _all_snap_sources_sorted.begin(); if (_all_snap_sources_sorted.front().getSourceType() & SNAPSOURCE_BBOX_CATEGORY) { _bbox_points.push_back(_all_snap_sources_sorted.front()); } else { _snap_points.push_back(_all_snap_sources_sorted.front()); } } } // TODO: This code is duplicated in transform-handle-set.cpp; fix this! void Inkscape::SelTrans::getNextClosestPoint(bool reverse) { Inkscape::Preferences *prefs = Inkscape::Preferences::get(); if (prefs->getBool("/options/snapclosestonly/value", false)) { if (!_all_snap_sources_sorted.empty()) { if (reverse) { // Shift-tab will find a closer point if (_all_snap_sources_iter == _all_snap_sources_sorted.begin()) { _all_snap_sources_iter = _all_snap_sources_sorted.end(); } --_all_snap_sources_iter; } else { // Tab will find a point further away ++_all_snap_sources_iter; if (_all_snap_sources_iter == _all_snap_sources_sorted.end()) { _all_snap_sources_iter = _all_snap_sources_sorted.begin(); } } _snap_points.clear(); _bbox_points.clear(); if ((*_all_snap_sources_iter).getSourceType() & SNAPSOURCE_BBOX_CATEGORY) { _bbox_points.push_back(*_all_snap_sources_iter); } else { _snap_points.push_back(*_all_snap_sources_iter); } // Show the updated snap source now; otherwise it won't be shown until the selection is being moved again SnapManager &m = _desktop->namedview->snap_manager; m.setup(_desktop); m.displaySnapsource(*_all_snap_sources_iter); m.unSetup(); } } } /* Local Variables: mode:c++ c-file-style:"stroustrup" c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +)) indent-tabs-mode:nil fill-column:99 End: */ // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:fileencoding=utf-8:textwidth=99 :