1 /** @file
2 * @brief Helper object for transforming selected items
3 */
4 /* Authors:
5 * Lauris Kaplinski <lauris@kaplinski.com>
6 * bulia byak <buliabyak@users.sf.net>
7 * Carl Hetherington <inkscape@carlh.net>
8 * Diederik van Lierop <mail@diedenrezi.nl>
9 *
10 * Copyright (C) 1999-2002 Lauris Kaplinski
11 * Copyright (C) 1999-2008 Authors
12 *
13 * Released under GNU GPL, read the file 'COPYING' for more information
14 */
16 #ifdef HAVE_CONFIG_H
17 # include <config.h>
18 #endif
19 #include <cstring>
20 #include <string>
22 #include <2geom/transforms.h>
23 #include <gdk/gdkkeysyms.h>
24 #include "document.h"
25 #include "sp-namedview.h"
26 #include "desktop.h"
27 #include "desktop-handles.h"
28 #include "desktop-style.h"
29 #include "knot.h"
30 #include "snap.h"
31 #include "selection.h"
32 #include "select-context.h"
33 #include "sp-item.h"
34 #include "sp-item-transform.h"
35 #include "seltrans-handles.h"
36 #include "seltrans.h"
37 #include "selection-chemistry.h"
38 #include "sp-metrics.h"
39 #include "verbs.h"
40 #include <glibmm/i18n.h>
41 #include "display/sp-ctrlline.h"
42 #include "preferences.h"
43 #include "xml/repr.h"
44 #include "mod360.h"
45 #include <2geom/angle.h>
46 #include "display/snap-indicator.h"
49 static void sp_remove_handles(SPKnot *knot[], gint num);
51 static void sp_sel_trans_handle_grab(SPKnot *knot, guint state, gpointer data);
52 static void sp_sel_trans_handle_ungrab(SPKnot *knot, guint state, gpointer data);
53 static void sp_sel_trans_handle_click(SPKnot *knot, guint state, gpointer data);
54 static void sp_sel_trans_handle_new_event(SPKnot *knot, Geom::Point *position, guint32 state, gpointer data);
55 static gboolean sp_sel_trans_handle_request(SPKnot *knot, Geom::Point *p, guint state, gboolean *data);
57 extern GdkPixbuf *handles[];
59 static gboolean sp_seltrans_handle_event(SPKnot *knot, GdkEvent *event, gpointer)
60 {
61 switch (event->type) {
62 case GDK_MOTION_NOTIFY:
63 break;
64 case GDK_KEY_PRESS:
65 if (get_group0_keyval (&event->key) == GDK_space) {
66 /* stamping mode: both mode(show content and outline) operation with knot */
67 if (!SP_KNOT_IS_GRABBED(knot)) {
68 return FALSE;
69 }
70 SPDesktop *desktop = knot->desktop;
71 Inkscape::SelTrans *seltrans = SP_SELECT_CONTEXT(desktop->event_context)->_seltrans;
72 seltrans->stamp();
73 return TRUE;
74 }
75 break;
76 default:
77 break;
78 }
80 return FALSE;
81 }
83 Inkscape::SelTrans::SelTrans(SPDesktop *desktop) :
84 _desktop(desktop),
85 _selcue(desktop),
86 _state(STATE_SCALE),
87 _show(SHOW_CONTENT),
88 _grabbed(false),
89 _show_handles(true),
90 _bbox(),
91 _approximate_bbox(),
92 _absolute_affine(Geom::Scale(1,1)),
93 _opposite(Geom::Point(0,0)),
94 _opposite_for_specpoints(Geom::Point(0,0)),
95 _opposite_for_bboxpoints(Geom::Point(0,0)),
96 _origin_for_specpoints(Geom::Point(0,0)),
97 _origin_for_bboxpoints(Geom::Point(0,0)),
98 _chandle(NULL),
99 _stamp_cache(NULL),
100 _message_context(desktop->messageStack())
101 {
102 Inkscape::Preferences *prefs = Inkscape::Preferences::get();
103 int prefs_bbox = prefs->getBool("/tools/bounding_box");
104 _snap_bbox_type = !prefs_bbox ?
105 SPItem::APPROXIMATE_BBOX : SPItem::GEOMETRIC_BBOX;
107 g_return_if_fail(desktop != NULL);
109 for (int i = 0; i < 8; i++) {
110 _shandle[i] = NULL;
111 _rhandle[i] = NULL;
112 }
114 _updateVolatileState();
115 _current_relative_affine.setIdentity();
117 _center_is_set = false; // reread _center from items, or set to bbox midpoint
119 _updateHandles();
121 _selection = sp_desktop_selection(desktop);
123 _norm = sp_canvas_item_new(sp_desktop_controls(desktop),
124 SP_TYPE_CTRL,
125 "anchor", GTK_ANCHOR_CENTER,
126 "mode", SP_CTRL_MODE_COLOR,
127 "shape", SP_CTRL_SHAPE_BITMAP,
128 "size", 13.0,
129 "filled", TRUE,
130 "fill_color", 0x00000000,
131 "stroked", TRUE,
132 "stroke_color", 0x000000a0,
133 "pixbuf", handles[12],
134 NULL);
136 _grip = sp_canvas_item_new(sp_desktop_controls(desktop),
137 SP_TYPE_CTRL,
138 "anchor", GTK_ANCHOR_CENTER,
139 "mode", SP_CTRL_MODE_XOR,
140 "shape", SP_CTRL_SHAPE_CROSS,
141 "size", 7.0,
142 "filled", TRUE,
143 "fill_color", 0xffffff7f,
144 "stroked", TRUE,
145 "stroke_color", 0xffffffff,
146 "pixbuf", handles[12],
147 NULL);
149 sp_canvas_item_hide(_grip);
150 sp_canvas_item_hide(_norm);
152 for (int i = 0; i < 4; i++) {
153 _l[i] = sp_canvas_item_new(sp_desktop_controls(desktop), SP_TYPE_CTRLLINE, NULL);
154 sp_canvas_item_hide(_l[i]);
155 }
157 _sel_changed_connection = _selection->connectChanged(
158 sigc::mem_fun(*this, &Inkscape::SelTrans::_selChanged)
159 );
161 _sel_modified_connection = _selection->connectModified(
162 sigc::mem_fun(*this, &Inkscape::SelTrans::_selModified)
163 );
164 }
166 Inkscape::SelTrans::~SelTrans()
167 {
168 _sel_changed_connection.disconnect();
169 _sel_modified_connection.disconnect();
171 for (unsigned int i = 0; i < 8; i++) {
172 if (_shandle[i]) {
173 g_object_unref(G_OBJECT(_shandle[i]));
174 _shandle[i] = NULL;
175 }
176 if (_rhandle[i]) {
177 g_object_unref(G_OBJECT(_rhandle[i]));
178 _rhandle[i] = NULL;
179 }
180 }
181 if (_chandle) {
182 g_object_unref(G_OBJECT(_chandle));
183 _chandle = NULL;
184 }
186 if (_norm) {
187 gtk_object_destroy(GTK_OBJECT(_norm));
188 _norm = NULL;
189 }
190 if (_grip) {
191 gtk_object_destroy(GTK_OBJECT(_grip));
192 _grip = NULL;
193 }
194 for (int i = 0; i < 4; i++) {
195 if (_l[i]) {
196 gtk_object_destroy(GTK_OBJECT(_l[i]));
197 _l[i] = NULL;
198 }
199 }
201 for (unsigned i = 0; i < _items.size(); i++) {
202 sp_object_unref(SP_OBJECT(_items[i]), NULL);
203 }
205 _items.clear();
206 _items_const.clear();
207 _items_affines.clear();
208 _items_centers.clear();
209 }
211 void Inkscape::SelTrans::resetState()
212 {
213 _state = STATE_SCALE;
214 }
216 void Inkscape::SelTrans::increaseState()
217 {
218 if (_state == STATE_SCALE) {
219 _state = STATE_ROTATE;
220 } else {
221 _state = STATE_SCALE;
222 }
224 _center_is_set = true; // no need to reread center
226 _updateHandles();
227 }
229 void Inkscape::SelTrans::setCenter(Geom::Point const &p)
230 {
231 _center = p;
232 _center_is_set = true;
234 // Write the new center position into all selected items
235 for (GSList const *l = _desktop->selection->itemList(); l; l = l->next) {
236 SPItem *it = (SPItem*)SP_OBJECT(l->data);
237 it->setCenter(p);
238 // only set the value; updating repr and document_done will be done once, on ungrab
239 }
241 _updateHandles();
242 }
244 void Inkscape::SelTrans::grab(Geom::Point const &p, gdouble x, gdouble y, bool show_handles)
245 {
246 Inkscape::Selection *selection = sp_desktop_selection(_desktop);
248 g_return_if_fail(!_grabbed);
250 _grabbed = true;
251 _show_handles = show_handles;
252 _updateVolatileState();
253 _current_relative_affine.setIdentity();
255 _changed = false;
257 if (_empty) {
258 return;
259 }
261 for (GSList const *l = selection->itemList(); l; l = l->next) {
262 SPItem *it = (SPItem *)sp_object_ref(SP_OBJECT(l->data), NULL);
263 _items.push_back(it);
264 _items_const.push_back(it);
265 _items_affines.push_back(sp_item_i2d_affine(it));
266 _items_centers.push_back(it->getCenter()); // for content-dragging, we need to remember original centers
267 }
269 _handle_x = x;
270 _handle_y = y;
272 // The selector tool should snap the bbox, special snappoints, and path nodes
273 // (The special points are the handles, center, rotation axis, font baseline, ends of spiral, etc.)
275 // First, determine the bounding box for snapping ...
276 _bbox = selection->bounds(_snap_bbox_type);
277 _approximate_bbox = selection->bounds(SPItem::APPROXIMATE_BBOX); // Used for correctly scaling the strokewidth
278 _geometric_bbox = selection->bounds(SPItem::GEOMETRIC_BBOX);
279 _point = p;
280 if (_geometric_bbox) {
281 _point_geom = _geometric_bbox->min() + _geometric_bbox->dimensions() * Geom::Scale(x, y);
282 } else {
283 _point_geom = p;
284 }
286 // Next, get all points to consider for snapping
287 SnapManager const &m = _desktop->namedview->snap_manager;
288 Inkscape::SnapPreferences local_snapprefs = m.snapprefs;
289 local_snapprefs.setSnapToItemNode(true); // We should get at least the cusp nodes here. This might
290 // have been turned off because (for example) the user only want paths as a snap target, not nodes
291 // but as a snap source we still need some nodes though!
292 _snap_points.clear();
293 _snap_points = selection->getSnapPoints(&local_snapprefs);
294 std::vector<Geom::Point> snap_points_hull = selection->getSnapPointsConvexHull(&local_snapprefs);
295 if (_snap_points.size() > 100) {
296 /* Snapping a huge number of nodes will take way too long, so limit the number of snappable nodes
297 An average user would rarely ever try to snap such a large number of nodes anyway, because
298 (s)he could hardly discern which node would be snapping */
299 _snap_points = snap_points_hull;
300 // Unfortunately, by now we will have lost the font-baseline snappoints :-(
301 }
303 // Find bbox hulling all special points, which excludes stroke width. Here we need to include the
304 // path nodes, for example because a rectangle which has been converted to a path doesn't have
305 // any other special points
306 Geom::Rect snap_points_bbox;
307 if ( snap_points_hull.empty() == false ) {
308 std::vector<Geom::Point>::iterator i = snap_points_hull.begin();
309 snap_points_bbox = Geom::Rect(*i, *i);
310 i++;
311 while (i != snap_points_hull.end()) {
312 snap_points_bbox.expandTo(*i);
313 i++;
314 }
315 }
317 _bbox_points.clear();
318 if (_bbox) {
319 if (m.snapprefs.getSnapModeBBox()) {
320 getBBoxPoints(_bbox, &_bbox_points, true, m.snapprefs.getSnapBBoxEdgeMidpoints(), m.snapprefs.getSnapBBoxMidpoints());
321 }
322 // There are two separate "opposites" (i.e. opposite w.r.t. the handle being dragged):
323 // - one for snapping the boundingbox, which can be either visual or geometric
324 // - one for snapping the special points
325 // The "opposite" in case of a geometric boundingbox always coincides with the "opposite" for the special points
326 // These distinct "opposites" are needed in the snapmanager to avoid bugs such as #sf1540195 (in which
327 // a box is caught between two guides)
328 _opposite_for_bboxpoints = _bbox->min() + _bbox->dimensions() * Geom::Scale(1-x, 1-y);
329 _opposite_for_specpoints = snap_points_bbox.min() + snap_points_bbox.dimensions() * Geom::Scale(1-x, 1-y);
330 _opposite = _opposite_for_bboxpoints;
331 }
333 // When snapping the node closest to the mouse pointer is absolutely preferred over the closest snap
334 // (i.e. when weight == 1), then we will not even try to snap to other points and discard those other
335 // points immediately.
336 Inkscape::Preferences *prefs = Inkscape::Preferences::get();
337 if (prefs->getBool("/options/snapclosestonly/value", false)) {
338 if (m.snapprefs.getSnapModeNode()) {
339 _keepClosestPointOnly(_snap_points, p);
340 } else {
341 _snap_points.clear(); // don't keep any point
342 }
344 if (m.snapprefs.getSnapModeBBox()) {
345 _keepClosestPointOnly(_bbox_points, p);
346 } else {
347 _bbox_points.clear(); // don't keep any point
348 }
350 g_assert(_bbox_points.size() < 2 && _snap_points.size() < 2);
351 if (_snap_points.size() == 1 && _bbox_points.size() == 1) { //both vectors can only have either one or zero elements
352 // So we have exactly one bbox corner and one node left; now find out which is closest and delete the other one
353 if (Geom::L2(_snap_points.at(0) - p) < Geom::L2(_bbox_points.at(0) - p)) {
354 _bbox_points.clear();
355 } else {
356 _snap_points.clear();
357 }
358 }
360 // Now either _bbox_points or _snap_points has a single element, the other one has zero..... or both have zero elements
361 g_assert((_bbox_points.size() + _snap_points.size()) < 2);
362 if (m.snapprefs.getSnapEnabledGlobally()) {
363 if (_bbox_points.size() == 1) {
364 _desktop->snapindicator->set_new_snapsource(_bbox_points.at(0));
365 } else if (_snap_points.size() == 1){
366 _desktop->snapindicator->set_new_snapsource(_snap_points.at(0));
367 }
368 }
369 }
371 sp_canvas_set_snap_delay_active(_desktop->canvas, true);
373 // The lines below are useful for debugging any snapping issues, as they'll spit out all points that are considered for snapping
375 /*std::cout << "Number of snap points: " << _snap_points.size() << std::endl;
376 for (std::vector<Geom::Point>::const_iterator i = _snap_points.begin(); i != _snap_points.end(); i++)
377 {
378 std::cout << " " << *i << std::endl;
379 }
381 std::cout << "Number of bbox points: " << _bbox_points.size() << std::endl;
382 for (std::vector<Geom::Point>::const_iterator i = _bbox_points.begin(); i != _bbox_points.end(); i++)
383 {
384 std::cout << " " << *i << std::endl;
385 }*/
387 if ((x != -1) && (y != -1)) {
388 sp_canvas_item_show(_norm);
389 sp_canvas_item_show(_grip);
390 }
392 if (_show == SHOW_OUTLINE) {
393 for (int i = 0; i < 4; i++)
394 sp_canvas_item_show(_l[i]);
395 }
397 _updateHandles();
398 g_return_if_fail(_stamp_cache == NULL);
399 }
401 void Inkscape::SelTrans::transform(Geom::Matrix const &rel_affine, Geom::Point const &norm)
402 {
403 g_return_if_fail(_grabbed);
404 g_return_if_fail(!_empty);
406 Geom::Matrix const affine( Geom::Translate(-norm) * rel_affine * Geom::Translate(norm) );
408 if (_show == SHOW_CONTENT) {
409 // update the content
410 for (unsigned i = 0; i < _items.size(); i++) {
411 SPItem &item = *_items[i];
412 Geom::Matrix const &prev_transform = _items_affines[i];
413 sp_item_set_i2d_affine(&item, prev_transform * affine);
414 }
415 } else {
416 if (_bbox) {
417 Geom::Point p[4];
418 /* update the outline */
419 for (unsigned i = 0 ; i < 4 ; i++) {
420 p[i] = _bbox->corner(i) * affine;
421 }
422 for (unsigned i = 0 ; i < 4 ; i++) {
423 sp_ctrlline_set_coords(SP_CTRLLINE(_l[i]), p[i], p[(i+1)%4]);
424 }
425 }
426 }
428 _current_relative_affine = affine;
429 _changed = true;
430 _updateHandles();
431 }
433 void Inkscape::SelTrans::ungrab()
434 {
435 g_return_if_fail(_grabbed);
436 _grabbed = false;
437 _show_handles = true;
439 sp_canvas_set_snap_delay_active(_desktop->canvas, false);
441 _desktop->snapindicator->remove_snapsource();
443 Inkscape::Selection *selection = sp_desktop_selection(_desktop);
444 _updateVolatileState();
446 for (unsigned i = 0; i < _items.size(); i++) {
447 sp_object_unref(SP_OBJECT(_items[i]), NULL);
448 }
450 sp_canvas_item_hide(_norm);
451 sp_canvas_item_hide(_grip);
453 if (_show == SHOW_OUTLINE) {
454 for (int i = 0; i < 4; i++)
455 sp_canvas_item_hide(_l[i]);
456 }
458 if (_stamp_cache) {
459 g_slist_free(_stamp_cache);
460 _stamp_cache = NULL;
461 }
463 _message_context.clear();
465 if (!_empty && _changed) {
466 sp_selection_apply_affine(selection, _current_relative_affine, (_show == SHOW_OUTLINE)? true : false);
467 if (_center) {
468 *_center *= _current_relative_affine;
469 _center_is_set = true;
470 }
472 // If dragging showed content live, sp_selection_apply_affine cannot change the centers
473 // appropriately - it does not know the original positions of the centers (all objects already have
474 // the new bboxes). So we need to reset the centers from our saved array.
475 if (_show != SHOW_OUTLINE && !_current_relative_affine.isTranslation()) {
476 for (unsigned i = 0; i < _items_centers.size(); i++) {
477 SPItem *currentItem = _items[i];
478 if (currentItem->isCenterSet()) { // only if it's already set
479 currentItem->setCenter (_items_centers[i] * _current_relative_affine);
480 SP_OBJECT(currentItem)->updateRepr();
481 }
482 }
483 }
485 _items.clear();
486 _items_const.clear();
487 _items_affines.clear();
488 _items_centers.clear();
490 if (_current_relative_affine.isTranslation()) {
491 sp_document_done(sp_desktop_document(_desktop), SP_VERB_CONTEXT_SELECT,
492 _("Move"));
493 } else if (_current_relative_affine.isScale()) {
494 sp_document_done(sp_desktop_document(_desktop), SP_VERB_CONTEXT_SELECT,
495 _("Scale"));
496 } else if (_current_relative_affine.isRotation()) {
497 sp_document_done(sp_desktop_document(_desktop), SP_VERB_CONTEXT_SELECT,
498 _("Rotate"));
499 } else {
500 sp_document_done(sp_desktop_document(_desktop), SP_VERB_CONTEXT_SELECT,
501 _("Skew"));
502 }
504 } else {
506 if (_center_is_set) {
507 // we were dragging center; update reprs and commit undoable action
508 for (GSList const *l = _desktop->selection->itemList(); l; l = l->next) {
509 SPItem *it = (SPItem*)SP_OBJECT(l->data);
510 SP_OBJECT(it)->updateRepr();
511 }
512 sp_document_done (sp_desktop_document(_desktop), SP_VERB_CONTEXT_SELECT,
513 _("Set center"));
514 }
516 _items.clear();
517 _items_const.clear();
518 _items_affines.clear();
519 _items_centers.clear();
520 _updateHandles();
521 }
522 }
524 /* fixme: This is really bad, as we compare positions for each stamp (Lauris) */
525 /* fixme: IMHO the best way to keep sort cache would be to implement timestamping at last */
527 void Inkscape::SelTrans::stamp()
528 {
529 Inkscape::Selection *selection = sp_desktop_selection(_desktop);
531 bool fixup = !_grabbed;
532 if ( fixup && _stamp_cache ) {
533 // TODO - give a proper fix. Simple temproary work-around for the grab() issue
534 g_slist_free(_stamp_cache);
535 _stamp_cache = NULL;
536 }
538 /* stamping mode */
539 if (!_empty) {
540 GSList *l;
541 if (_stamp_cache) {
542 l = _stamp_cache;
543 } else {
544 /* Build cache */
545 l = g_slist_copy((GSList *) selection->itemList());
546 l = g_slist_sort(l, (GCompareFunc) sp_object_compare_position);
547 _stamp_cache = l;
548 }
550 while (l) {
551 SPItem *original_item = SP_ITEM(l->data);
552 Inkscape::XML::Node *original_repr = SP_OBJECT_REPR(original_item);
554 // remember the position of the item
555 gint pos = original_repr->position();
556 // remember parent
557 Inkscape::XML::Node *parent = sp_repr_parent(original_repr);
559 Inkscape::XML::Node *copy_repr = original_repr->duplicate(parent->document());
561 // add the new repr to the parent
562 parent->appendChild(copy_repr);
563 // move to the saved position
564 copy_repr->setPosition(pos > 0 ? pos : 0);
566 SPItem *copy_item = (SPItem *) sp_desktop_document(_desktop)->getObjectByRepr(copy_repr);
568 Geom::Matrix const *new_affine;
569 if (_show == SHOW_OUTLINE) {
570 Geom::Matrix const i2d(sp_item_i2d_affine(original_item));
571 Geom::Matrix const i2dnew( i2d * _current_relative_affine );
572 sp_item_set_i2d_affine(copy_item, i2dnew);
573 new_affine = ©_item->transform;
574 } else {
575 new_affine = &original_item->transform;
576 }
578 sp_item_write_transform(copy_item, copy_repr, *new_affine);
580 if ( copy_item->isCenterSet() && _center ) {
581 copy_item->setCenter(*_center * _current_relative_affine);
582 }
584 Inkscape::GC::release(copy_repr);
585 l = l->next;
586 }
587 sp_document_done(sp_desktop_document(_desktop), SP_VERB_CONTEXT_SELECT,
588 _("Stamp"));
589 }
591 if ( fixup && _stamp_cache ) {
592 // TODO - give a proper fix. Simple temproary work-around for the grab() issue
593 g_slist_free(_stamp_cache);
594 _stamp_cache = NULL;
595 }
596 }
598 void Inkscape::SelTrans::_updateHandles()
599 {
600 if ( !_show_handles || _empty )
601 {
602 sp_remove_handles(_shandle, 8);
603 sp_remove_handles(_rhandle, 8);
604 sp_remove_handles(&_chandle, 1);
605 return;
606 }
608 // center handle
609 if ( _chandle == NULL ) {
610 _chandle = sp_knot_new(_desktop, _("<b>Center</b> of rotation and skewing: drag to reposition; scaling with Shift also uses this center"));
612 _chandle->setShape (SP_CTRL_SHAPE_BITMAP);
613 _chandle->setSize (13);
614 _chandle->setAnchor (handle_center.anchor);
615 _chandle->setMode (SP_CTRL_MODE_XOR);
616 _chandle->setFill(0x00000000, 0x00000000, 0x00000000);
617 _chandle->setStroke(0x000000ff, 0xff0000b0, 0xff0000b0);
618 _chandle->setPixbuf(handles[handle_center.control]);
619 sp_knot_update_ctrl(_chandle);
621 g_signal_connect(G_OBJECT(_chandle), "request",
622 G_CALLBACK(sp_sel_trans_handle_request), (gpointer) &handle_center);
623 g_signal_connect(G_OBJECT(_chandle), "moved",
624 G_CALLBACK(sp_sel_trans_handle_new_event), (gpointer) &handle_center);
625 g_signal_connect(G_OBJECT(_chandle), "grabbed",
626 G_CALLBACK(sp_sel_trans_handle_grab), (gpointer) &handle_center);
627 g_signal_connect(G_OBJECT(_chandle), "ungrabbed",
628 G_CALLBACK(sp_sel_trans_handle_ungrab), (gpointer) &handle_center);
629 g_signal_connect(G_OBJECT(_chandle), "clicked",
630 G_CALLBACK(sp_sel_trans_handle_click), (gpointer) &handle_center);
631 }
633 sp_remove_handles(&_chandle, 1);
634 if ( _state == STATE_SCALE ) {
635 sp_remove_handles(_rhandle, 8);
636 _showHandles(_shandle, handles_scale, 8,
637 _("<b>Squeeze or stretch</b> selection; with <b>Ctrl</b> to scale uniformly; with <b>Shift</b> to scale around rotation center"),
638 _("<b>Scale</b> selection; with <b>Ctrl</b> to scale uniformly; with <b>Shift</b> to scale around rotation center"));
639 } else {
640 sp_remove_handles(_shandle, 8);
641 _showHandles(_rhandle, handles_rotate, 8,
642 _("<b>Skew</b> selection; with <b>Ctrl</b> to snap angle; with <b>Shift</b> to skew around the opposite side"),
643 _("<b>Rotate</b> selection; with <b>Ctrl</b> to snap angle; with <b>Shift</b> to rotate around the opposite corner"));
644 }
646 if (!_center_is_set) {
647 _center = _desktop->selection->center();
648 _center_is_set = true;
649 }
651 if ( _state == STATE_SCALE || !_center ) {
652 sp_knot_hide(_chandle);
653 } else {
654 sp_knot_show(_chandle);
655 sp_knot_moveto(_chandle, *_center);
656 }
657 }
659 void Inkscape::SelTrans::_updateVolatileState()
660 {
661 Inkscape::Selection *selection = sp_desktop_selection(_desktop);
662 _empty = selection->isEmpty();
664 if (_empty) {
665 return;
666 }
668 //Update the bboxes
669 _bbox = selection->bounds(_snap_bbox_type);
670 _approximate_bbox = selection->bounds(SPItem::APPROXIMATE_BBOX);
672 if (!_bbox) {
673 _empty = true;
674 return;
675 }
677 _strokewidth = stroke_average_width (selection->itemList());
678 }
680 static void sp_remove_handles(SPKnot *knot[], gint num)
681 {
682 for (int i = 0; i < num; i++) {
683 if (knot[i] != NULL) {
684 sp_knot_hide(knot[i]);
685 }
686 }
687 }
689 void Inkscape::SelTrans::_showHandles(SPKnot *knot[], SPSelTransHandle const handle[], gint num,
690 gchar const *even_tip, gchar const *odd_tip)
691 {
692 g_return_if_fail( !_empty );
694 for (int i = 0; i < num; i++) {
695 if (knot[i] == NULL) {
696 knot[i] = sp_knot_new(_desktop, i % 2 ? even_tip : odd_tip);
698 knot[i]->setShape (SP_CTRL_SHAPE_BITMAP);
699 knot[i]->setSize (13);
700 knot[i]->setAnchor (handle[i].anchor);
701 knot[i]->setMode (SP_CTRL_MODE_XOR);
702 knot[i]->setFill(0x000000ff, 0x00ff6600, 0x00ff6600); // inversion, green, green
703 knot[i]->setStroke(0x000000ff, 0x000000ff, 0x000000ff); // inversion
704 knot[i]->setPixbuf(handles[handle[i].control]);
705 sp_knot_update_ctrl(knot[i]);
707 g_signal_connect(G_OBJECT(knot[i]), "request",
708 G_CALLBACK(sp_sel_trans_handle_request), (gpointer) &handle[i]);
709 g_signal_connect(G_OBJECT(knot[i]), "moved",
710 G_CALLBACK(sp_sel_trans_handle_new_event), (gpointer) &handle[i]);
711 g_signal_connect(G_OBJECT(knot[i]), "grabbed",
712 G_CALLBACK(sp_sel_trans_handle_grab), (gpointer) &handle[i]);
713 g_signal_connect(G_OBJECT(knot[i]), "ungrabbed",
714 G_CALLBACK(sp_sel_trans_handle_ungrab), (gpointer) &handle[i]);
715 g_signal_connect(G_OBJECT(knot[i]), "event", G_CALLBACK(sp_seltrans_handle_event), (gpointer) &handle[i]);
716 }
717 sp_knot_show(knot[i]);
719 Geom::Point const handle_pt(handle[i].x, handle[i].y);
720 // shouldn't have nullary bbox, but knots
721 g_assert(_bbox);
722 Geom::Point p( _bbox->min()
723 + ( _bbox->dimensions()
724 * Geom::Scale(handle_pt) ) );
726 sp_knot_moveto(knot[i], p);
727 }
728 }
730 static void sp_sel_trans_handle_grab(SPKnot *knot, guint state, gpointer data)
731 {
732 SP_SELECT_CONTEXT(knot->desktop->event_context)->_seltrans->handleGrab(
733 knot, state, *(SPSelTransHandle const *) data
734 );
735 }
737 static void sp_sel_trans_handle_ungrab(SPKnot *knot, guint /*state*/, gpointer /*data*/)
738 {
739 SP_SELECT_CONTEXT(knot->desktop->event_context)->_seltrans->ungrab();
740 }
742 static void sp_sel_trans_handle_new_event(SPKnot *knot, Geom::Point *position, guint state, gpointer data)
743 {
744 SP_SELECT_CONTEXT(knot->desktop->event_context)->_seltrans->handleNewEvent(
745 knot, position, state, *(SPSelTransHandle const *) data
746 );
747 }
749 static gboolean sp_sel_trans_handle_request(SPKnot *knot, Geom::Point *position, guint state, gboolean *data)
750 {
751 return SP_SELECT_CONTEXT(knot->desktop->event_context)->_seltrans->handleRequest(
752 knot, position, state, *(SPSelTransHandle const *) data
753 );
754 }
756 static void sp_sel_trans_handle_click(SPKnot *knot, guint state, gpointer data)
757 {
758 SP_SELECT_CONTEXT(knot->desktop->event_context)->_seltrans->handleClick(
759 knot, state, *(SPSelTransHandle const *) data
760 );
761 }
763 void Inkscape::SelTrans::handleClick(SPKnot */*knot*/, guint state, SPSelTransHandle const &handle)
764 {
765 switch (handle.anchor) {
766 case GTK_ANCHOR_CENTER:
767 if (state & GDK_SHIFT_MASK) {
768 // Unset the center position for all selected items
769 for (GSList const *l = _desktop->selection->itemList(); l; l = l->next) {
770 SPItem *it = (SPItem*)(SP_OBJECT(l->data));
771 it->unsetCenter();
772 SP_OBJECT(it)->updateRepr();
773 _center_is_set = false; // center has changed
774 _updateHandles();
775 }
776 sp_document_done (sp_desktop_document(_desktop), SP_VERB_CONTEXT_SELECT,
777 _("Reset center"));
778 }
779 break;
780 default:
781 break;
782 }
783 }
785 void Inkscape::SelTrans::handleGrab(SPKnot *knot, guint /*state*/, SPSelTransHandle const &handle)
786 {
787 switch (handle.anchor) {
788 case GTK_ANCHOR_CENTER:
789 g_object_set(G_OBJECT(_grip),
790 "shape", SP_CTRL_SHAPE_BITMAP,
791 "size", 13.0,
792 NULL);
793 sp_canvas_item_show(_grip);
794 break;
795 default:
796 g_object_set(G_OBJECT(_grip),
797 "shape", SP_CTRL_SHAPE_CROSS,
798 "size", 7.0,
799 NULL);
800 sp_canvas_item_show(_norm);
801 sp_canvas_item_show(_grip);
803 break;
804 }
806 grab(sp_knot_position(knot), handle.x, handle.y, FALSE);
807 }
810 void Inkscape::SelTrans::handleNewEvent(SPKnot *knot, Geom::Point *position, guint state, SPSelTransHandle const &handle)
811 {
812 if (!SP_KNOT_IS_GRABBED(knot)) {
813 return;
814 }
816 // in case items have been unhooked from the document, don't
817 // try to continue processing events for them.
818 for (unsigned int i = 0; i < _items.size(); i++) {
819 if (!SP_OBJECT_DOCUMENT(SP_OBJECT(_items[i])) ) {
820 return;
821 }
822 }
824 handle.action(this, handle, *position, state);
825 }
828 gboolean Inkscape::SelTrans::handleRequest(SPKnot *knot, Geom::Point *position, guint state, SPSelTransHandle const &handle)
829 {
830 if (!SP_KNOT_IS_GRABBED(knot)) {
831 return TRUE;
832 }
834 knot->desktop->setPosition(*position);
836 // When holding shift while rotating or skewing, the transformation will be
837 // relative to the point opposite of the handle; otherwise it will be relative
838 // to the center as set for the selection
839 if ((!(state & GDK_SHIFT_MASK) == !(_state == STATE_ROTATE)) && (&handle != &handle_center)) {
840 _origin = _opposite;
841 _origin_for_bboxpoints = _opposite_for_bboxpoints;
842 _origin_for_specpoints = _opposite_for_specpoints;
843 } else if (_center) {
844 _origin = *_center;
845 _origin_for_bboxpoints = *_center;
846 _origin_for_specpoints = *_center;
847 } else {
848 // FIXME
849 return TRUE;
850 }
851 if (handle.request(this, handle, *position, state)) {
852 sp_knot_set_position(knot, *position, state);
853 SP_CTRL(_grip)->moveto(*position);
854 SP_CTRL(_norm)->moveto(_origin);
855 }
857 return TRUE;
858 }
861 void Inkscape::SelTrans::_selChanged(Inkscape::Selection */*selection*/)
862 {
863 if (!_grabbed) {
864 Inkscape::Preferences *prefs = Inkscape::Preferences::get();
865 // reread in case it changed on the fly:
866 int prefs_bbox = prefs->getBool("/tools/bounding_box");
867 _snap_bbox_type = !prefs_bbox ?
868 SPItem::APPROXIMATE_BBOX : SPItem::GEOMETRIC_BBOX;
869 //SPItem::APPROXIMATE_BBOX will be replaced by SPItem::VISUAL_BBOX, as soon as the latter is implemented properly
871 _updateVolatileState();
872 _current_relative_affine.setIdentity();
873 _center_is_set = false; // center(s) may have changed
874 _updateHandles();
875 }
876 }
878 void Inkscape::SelTrans::_selModified(Inkscape::Selection */*selection*/, guint /*flags*/)
879 {
880 if (!_grabbed) {
881 _updateVolatileState();
882 _current_relative_affine.setIdentity();
884 // reset internal flag
885 _changed = false;
887 _center_is_set = false; // center(s) may have changed
889 _updateHandles();
890 }
891 }
893 /*
894 * handlers for handle move-request
895 */
897 /** Returns -1 or 1 according to the sign of x. Returns 1 for 0 and NaN. */
898 static double sign(double const x)
899 {
900 return ( x < 0
901 ? -1
902 : 1 );
903 }
905 gboolean sp_sel_trans_scale_request(Inkscape::SelTrans *seltrans,
906 SPSelTransHandle const &, Geom::Point &pt, guint state)
907 {
908 return seltrans->scaleRequest(pt, state);
909 }
911 gboolean sp_sel_trans_stretch_request(Inkscape::SelTrans *seltrans,
912 SPSelTransHandle const &handle, Geom::Point &pt, guint state)
913 {
914 return seltrans->stretchRequest(handle, pt, state);
915 }
917 gboolean sp_sel_trans_skew_request(Inkscape::SelTrans *seltrans,
918 SPSelTransHandle const &handle, Geom::Point &pt, guint state)
919 {
920 return seltrans->skewRequest(handle, pt, state);
921 }
923 gboolean sp_sel_trans_rotate_request(Inkscape::SelTrans *seltrans,
924 SPSelTransHandle const &, Geom::Point &pt, guint state)
925 {
926 return seltrans->rotateRequest(pt, state);
927 }
929 gboolean sp_sel_trans_center_request(Inkscape::SelTrans *seltrans,
930 SPSelTransHandle const &, Geom::Point &pt, guint state)
931 {
932 return seltrans->centerRequest(pt, state);
933 }
935 gboolean Inkscape::SelTrans::scaleRequest(Geom::Point &pt, guint state)
936 {
938 // Calculate the scale factors, which can be either visual or geometric
939 // depending on which type of bbox is currently being used (see preferences -> selector tool)
940 Geom::Scale default_scale = calcScaleFactors(_point, pt, _origin);
942 // Find the scale factors for the geometric bbox
943 Geom::Point pt_geom = _getGeomHandlePos(pt);
944 Geom::Scale geom_scale = calcScaleFactors(_point_geom, pt_geom, _origin_for_specpoints);
946 _absolute_affine = Geom::identity(); //Initialize the scaler
948 if (state & GDK_MOD1_MASK) { // scale by an integer multiplier/divider
949 // We're scaling either the visual or the geometric bbox here (see the comment above)
950 for ( unsigned int i = 0 ; i < 2 ; i++ ) {
951 if (fabs(default_scale[i]) > 1) {
952 default_scale[i] = round(default_scale[i]);
953 } else if (default_scale[i] != 0) {
954 default_scale[i] = 1/round(1/(MIN(default_scale[i], 10)));
955 }
956 }
957 // Update the knot position
958 pt = _calcAbsAffineDefault(default_scale);
959 // When scaling by an integer, snapping is not needed
960 } else {
961 // In all other cases we should try to snap now
962 SnapManager &m = _desktop->namedview->snap_manager;
963 m.setup(_desktop, false, _items_const);
965 Inkscape::SnappedPoint bb, sn;
966 Geom::Coord bd(NR_HUGE);
967 Geom::Coord sd(NR_HUGE);
969 if ((state & GDK_CONTROL_MASK) || _desktop->isToolboxButtonActive ("lock")) {
970 // Scale is locked to a 1:1 aspect ratio, so that s[X] must be made to equal s[Y].
971 //
972 // The aspect-ratio must be locked before snapping
973 if (fabs(default_scale[Geom::X]) > fabs(default_scale[Geom::Y])) {
974 default_scale[Geom::X] = fabs(default_scale[Geom::Y]) * sign(default_scale[Geom::X]);
975 geom_scale[Geom::X] = fabs(geom_scale[Geom::Y]) * sign(geom_scale[Geom::X]);
976 } else {
977 default_scale[Geom::Y] = fabs(default_scale[Geom::X]) * sign(default_scale[Geom::Y]);
978 geom_scale[Geom::Y] = fabs(geom_scale[Geom::X]) * sign(geom_scale[Geom::Y]);
979 }
981 // Snap along a suitable constraint vector from the origin.
982 bb = m.constrainedSnapScale(SnapPreferences::SNAPPOINT_BBOX, _bbox_points, _point, default_scale, _origin_for_bboxpoints);
983 sn = m.constrainedSnapScale(SnapPreferences::SNAPPOINT_NODE, _snap_points, _point, geom_scale, _origin_for_specpoints);
985 /* Choose the smaller difference in scale. Since s[X] == s[Y] we can
986 ** just compare difference in s[X].
987 */
988 bd = bb.getSnapped() ? fabs(bb.getTransformation()[Geom::X] - default_scale[Geom::X]) : NR_HUGE;
989 sd = sn.getSnapped() ? fabs(sn.getTransformation()[Geom::X] - geom_scale[Geom::X]) : NR_HUGE;
990 } else {
991 /* Scale aspect ratio is unlocked */
992 bb = m.freeSnapScale(SnapPreferences::SNAPPOINT_BBOX, _bbox_points, _point, default_scale, _origin_for_bboxpoints);
993 sn = m.freeSnapScale(SnapPreferences::SNAPPOINT_NODE, _snap_points, _point, geom_scale, _origin_for_specpoints);
995 /* Pick the snap that puts us closest to the original scale */
996 bd = bb.getSnapped() ? fabs(Geom::L2(bb.getTransformation()) - Geom::L2(Geom::Point(default_scale[Geom::X], default_scale[Geom::Y]))) : NR_HUGE;
997 sd = sn.getSnapped() ? fabs(Geom::L2(sn.getTransformation()) - Geom::L2(Geom::Point(geom_scale[Geom::X], geom_scale[Geom::Y]))) : NR_HUGE;
998 }
1000 if (!(bb.getSnapped() || sn.getSnapped())) {
1001 // We didn't snap at all! Don't update the handle position, just calculate the new transformation
1002 _calcAbsAffineDefault(default_scale);
1003 _desktop->snapindicator->remove_snaptarget();
1004 } else if (bd < sd) {
1005 // We snapped the bbox (which is either visual or geometric)
1006 _desktop->snapindicator->set_new_snaptarget(bb);
1007 default_scale = Geom::Scale(bb.getTransformation());
1008 // Calculate the new transformation and update the handle position
1009 pt = _calcAbsAffineDefault(default_scale);
1010 } else {
1011 _desktop->snapindicator->set_new_snaptarget(sn);
1012 // We snapped the special points (e.g. nodes), which are not at the visual bbox
1013 // The handle location however (pt) might however be at the visual bbox, so we
1014 // will have to calculate pt taking the stroke width into account
1015 geom_scale = Geom::Scale(sn.getTransformation());
1016 pt = _calcAbsAffineGeom(geom_scale);
1017 }
1018 }
1020 /* Status text */
1021 _message_context.setF(Inkscape::IMMEDIATE_MESSAGE,
1022 _("<b>Scale</b>: %0.2f%% x %0.2f%%; with <b>Ctrl</b> to lock ratio"),
1023 100 * _absolute_affine[0], 100 * _absolute_affine[3]);
1025 return TRUE;
1026 }
1028 gboolean Inkscape::SelTrans::stretchRequest(SPSelTransHandle const &handle, Geom::Point &pt, guint state)
1029 {
1030 Geom::Dim2 axis, perp;
1031 switch (handle.cursor) {
1032 case GDK_TOP_SIDE:
1033 case GDK_BOTTOM_SIDE:
1034 axis = Geom::Y;
1035 perp = Geom::X;
1036 break;
1037 case GDK_LEFT_SIDE:
1038 case GDK_RIGHT_SIDE:
1039 axis = Geom::X;
1040 perp = Geom::Y;
1041 break;
1042 default:
1043 g_assert_not_reached();
1044 return TRUE;
1045 };
1047 // Calculate the scale factors, which can be either visual or geometric
1048 // depending on which type of bbox is currently being used (see preferences -> selector tool)
1049 Geom::Scale default_scale = calcScaleFactors(_point, pt, _origin);
1050 default_scale[perp] = 1;
1052 // Find the scale factors for the geometric bbox
1053 Geom::Point pt_geom = _getGeomHandlePos(pt);
1054 Geom::Scale geom_scale = calcScaleFactors(_point_geom, pt_geom, _origin_for_specpoints);
1055 geom_scale[perp] = 1;
1057 _absolute_affine = Geom::identity(); //Initialize the scaler
1059 if (state & GDK_MOD1_MASK) { // stretch by an integer multiplier/divider
1060 if (fabs(default_scale[axis]) > 1) {
1061 default_scale[axis] = round(default_scale[axis]);
1062 } else if (default_scale[axis] != 0) {
1063 default_scale[axis] = 1/round(1/(MIN(default_scale[axis], 10)));
1064 }
1065 // Calculate the new transformation and update the handle position
1066 pt = _calcAbsAffineDefault(default_scale);
1067 // When stretching by an integer, snapping is not needed
1068 } else {
1069 // In all other cases we should try to snap now
1071 SnapManager &m = _desktop->namedview->snap_manager;
1072 m.setup(_desktop, false, _items_const);
1074 Inkscape::SnappedPoint bb, sn;
1075 g_assert(bb.getSnapped() == false); // Check initialization to catch any regression
1076 Geom::Coord bd(NR_HUGE);
1077 Geom::Coord sd(NR_HUGE);
1079 bool symmetrical = state & GDK_CONTROL_MASK;
1081 bb = m.constrainedSnapStretch(SnapPreferences::SNAPPOINT_BBOX, _bbox_points, _point, Geom::Coord(default_scale[axis]), _origin_for_bboxpoints, Geom::Dim2(axis), symmetrical);
1082 sn = m.constrainedSnapStretch(SnapPreferences::SNAPPOINT_NODE, _snap_points, _point, Geom::Coord(geom_scale[axis]), _origin_for_specpoints, Geom::Dim2(axis), symmetrical);
1084 if (bb.getSnapped()) {
1085 // We snapped the bbox (which is either visual or geometric)
1086 bd = fabs(bb.getTransformation()[axis] - default_scale[axis]);
1087 default_scale[axis] = bb.getTransformation()[axis];
1088 }
1090 if (sn.getSnapped()) {
1091 sd = fabs(sn.getTransformation()[axis] - geom_scale[axis]);
1092 geom_scale[axis] = sn.getTransformation()[axis];
1093 }
1095 if (symmetrical) {
1096 // on ctrl, apply symmetrical scaling instead of stretching
1097 // Preserve aspect ratio, but never flip in the dimension not being edited (by using fabs())
1098 default_scale[perp] = fabs(default_scale[axis]);
1099 geom_scale[perp] = fabs(geom_scale[axis]);
1100 }
1102 if (!(bb.getSnapped() || sn.getSnapped())) {
1103 // We didn't snap at all! Don't update the handle position, just calculate the new transformation
1104 _calcAbsAffineDefault(default_scale);
1105 _desktop->snapindicator->remove_snaptarget();
1106 } else if (bd < sd) {
1107 _desktop->snapindicator->set_new_snaptarget(bb);
1108 // Calculate the new transformation and update the handle position
1109 pt = _calcAbsAffineDefault(default_scale);
1110 } else {
1111 _desktop->snapindicator->set_new_snaptarget(sn);
1112 // We snapped the special points (e.g. nodes), which are not at the visual bbox
1113 // The handle location however (pt) might however be at the visual bbox, so we
1114 // will have to calculate pt taking the stroke width into account
1115 pt = _calcAbsAffineGeom(geom_scale);
1116 }
1117 }
1119 // status text
1120 _message_context.setF(Inkscape::IMMEDIATE_MESSAGE,
1121 _("<b>Scale</b>: %0.2f%% x %0.2f%%; with <b>Ctrl</b> to lock ratio"),
1122 100 * _absolute_affine[0], 100 * _absolute_affine[3]);
1124 return TRUE;
1125 }
1127 gboolean Inkscape::SelTrans::skewRequest(SPSelTransHandle const &handle, Geom::Point &pt, guint state)
1128 {
1129 /* When skewing (or rotating):
1130 * 1) the stroke width will not change. This makes life much easier because we don't have to
1131 * account for that (like for scaling or stretching). As a consequence, all points will
1132 * have the same origin for the transformation and for the snapping.
1133 * 2) When holding shift, the transformation will be relative to the point opposite of
1134 * the handle; otherwise it will be relative to the center as set for the selection
1135 */
1137 Geom::Dim2 dim_a;
1138 Geom::Dim2 dim_b;
1140 switch (handle.cursor) {
1141 case GDK_SB_H_DOUBLE_ARROW:
1142 dim_a = Geom::Y;
1143 dim_b = Geom::X;
1144 break;
1145 case GDK_SB_V_DOUBLE_ARROW:
1146 dim_a = Geom::X;
1147 dim_b = Geom::Y;
1148 break;
1149 default:
1150 g_assert_not_reached();
1151 abort();
1152 break;
1153 }
1155 Geom::Point const initial_delta = _point - _origin;
1157 if (fabs(initial_delta[dim_a]) < 1e-15) {
1158 return false;
1159 }
1161 // Calculate the scale factors, which can be either visual or geometric
1162 // depending on which type of bbox is currently being used (see preferences -> selector tool)
1163 Geom::Scale scale = calcScaleFactors(_point, pt, _origin, false);
1164 Geom::Scale skew = calcScaleFactors(_point, pt, _origin, true);
1165 scale[dim_b] = 1;
1166 skew[dim_b] = 1;
1168 if (fabs(scale[dim_a]) < 1) {
1169 // Prevent shrinking of the selected object, while allowing mirroring
1170 scale[dim_a] = sign(scale[dim_a]);
1171 } else {
1172 // Allow expanding of the selected object by integer multiples
1173 scale[dim_a] = floor(scale[dim_a] + 0.5);
1174 }
1176 double radians = atan(skew[dim_a] / scale[dim_a]);
1178 if (state & GDK_CONTROL_MASK) {
1179 Inkscape::Preferences *prefs = Inkscape::Preferences::get();
1180 // Snap to defined angle increments
1181 int snaps = prefs->getInt("/options/rotationsnapsperpi/value", 12);
1182 if (snaps) {
1183 double sections = floor(radians * snaps / M_PI + .5);
1184 if (fabs(sections) >= snaps / 2) {
1185 sections = sign(sections) * (snaps / 2 - 1);
1186 }
1187 radians = (M_PI / snaps) * sections;
1188 }
1189 skew[dim_a] = tan(radians) * scale[dim_a];
1190 } else {
1191 // Snap to objects, grids, guides
1193 SnapManager &m = _desktop->namedview->snap_manager;
1194 m.setup(_desktop, false, _items_const);
1196 Inkscape::Snapper::ConstraintLine const constraint(component_vectors[dim_b]);
1197 // When skewing, we cannot snap the corners of the bounding box, see the comment in "constrainedSnapSkew" for details
1198 Geom::Point const s(skew[dim_a], scale[dim_a]);
1199 Inkscape::SnappedPoint sn = m.constrainedSnapSkew(Inkscape::SnapPreferences::SNAPPOINT_NODE, _snap_points, _point, constraint, s, _origin, Geom::Dim2(dim_b));
1201 if (sn.getSnapped()) {
1202 // We snapped something, so change the skew to reflect it
1203 Geom::Coord const sd = sn.getSnapped() ? sn.getTransformation()[0] : NR_HUGE;
1204 _desktop->snapindicator->set_new_snaptarget(sn);
1205 skew[dim_a] = sd;
1206 } else {
1207 _desktop->snapindicator->remove_snaptarget();
1208 }
1209 }
1211 // Update the handle position
1212 pt[dim_b] = initial_delta[dim_a] * skew[dim_a] + _point[dim_b];
1213 pt[dim_a] = initial_delta[dim_a] * scale[dim_a] + _origin[dim_a];
1215 // Calculate the relative affine
1216 _relative_affine = Geom::identity();
1217 _relative_affine[2*dim_a + dim_a] = (pt[dim_a] - _origin[dim_a]) / initial_delta[dim_a];
1218 _relative_affine[2*dim_a + (dim_b)] = (pt[dim_b] - _point[dim_b]) / initial_delta[dim_a];
1219 _relative_affine[2*(dim_b) + (dim_a)] = 0;
1220 _relative_affine[2*(dim_b) + (dim_b)] = 1;
1222 for (int i = 0; i < 2; i++) {
1223 if (fabs(_relative_affine[3*i]) < 1e-15) {
1224 _relative_affine[3*i] = 1e-15;
1225 }
1226 }
1228 // Update the status text
1229 double degrees = mod360symm(Geom::rad_to_deg(radians));
1230 _message_context.setF(Inkscape::IMMEDIATE_MESSAGE,
1231 // TRANSLATORS: don't modify the first ";"
1232 // (it will NOT be displayed as ";" - only the second one will be)
1233 _("<b>Skew</b>: %0.2f°; with <b>Ctrl</b> to snap angle"),
1234 degrees);
1236 return TRUE;
1237 }
1239 gboolean Inkscape::SelTrans::rotateRequest(Geom::Point &pt, guint state)
1240 {
1241 /* When rotating (or skewing):
1242 * 1) the stroke width will not change. This makes life much easier because we don't have to
1243 * account for that (like for scaling or stretching). As a consequence, all points will
1244 * have the same origin for the transformation and for the snapping.
1245 * 2) When holding shift, the transformation will be relative to the point opposite of
1246 * the handle; otherwise it will be relative to the center as set for the selection
1247 */
1249 Inkscape::Preferences *prefs = Inkscape::Preferences::get();
1250 int snaps = prefs->getInt("/options/rotationsnapsperpi/value", 12);
1252 // rotate affine in rotate
1253 Geom::Point const d1 = _point - _origin;
1254 Geom::Point const d2 = pt - _origin;
1256 Geom::Coord const h1 = Geom::L2(d1); // initial radius
1257 if (h1 < 1e-15) return FALSE;
1258 Geom::Point q1 = d1 / h1; // normalized initial vector to handle
1259 Geom::Coord const h2 = Geom::L2(d2); // new radius
1260 if (fabs(h2) < 1e-15) return FALSE;
1261 Geom::Point q2 = d2 / h2; // normalized new vector to handle
1263 double radians;
1264 if (state & GDK_CONTROL_MASK) {
1265 // Snap to defined angle increments
1266 double cos_t = Geom::dot(q1, q2);
1267 double sin_t = Geom::dot(Geom::rot90(q1), q2);
1268 radians = atan2(sin_t, cos_t);
1269 if (snaps) {
1270 radians = ( M_PI / snaps ) * floor( radians * snaps / M_PI + .5 );
1271 }
1272 q1 = Geom::Point(1, 0);
1273 q2 = Geom::Point(cos(radians), sin(radians));
1274 } else {
1275 radians = atan2(Geom::dot(Geom::rot90(d1), d2),
1276 Geom::dot(d1, d2));
1277 }
1279 Geom::Rotate const r1(q1);
1280 Geom::Rotate const r2(q2);
1282 // Calculate the relative affine
1283 _relative_affine = r2 * r1.inverse();
1285 // Update the handle position
1286 pt = _point * Geom::Translate(-_origin) * _relative_affine * Geom::Translate(_origin);
1288 // Update the status text
1289 double degrees = mod360symm(Geom::rad_to_deg(radians));
1290 _message_context.setF(Inkscape::IMMEDIATE_MESSAGE,
1291 // TRANSLATORS: don't modify the first ";"
1292 // (it will NOT be displayed as ";" - only the second one will be)
1293 _("<b>Rotate</b>: %0.2f°; with <b>Ctrl</b> to snap angle"), degrees);
1295 return TRUE;
1296 }
1298 gboolean Inkscape::SelTrans::centerRequest(Geom::Point &pt, guint state)
1299 {
1300 SnapManager &m = _desktop->namedview->snap_manager;
1301 m.setup(_desktop);
1302 m.freeSnapReturnByRef(SnapPreferences::SNAPPOINT_NODE, pt);
1304 if (state & GDK_CONTROL_MASK) {
1305 if ( fabs(_point[Geom::X] - pt[Geom::X]) > fabs(_point[Geom::Y] - pt[Geom::Y]) ) {
1306 pt[Geom::Y] = _point[Geom::Y];
1307 } else {
1308 pt[Geom::X] = _point[Geom::X];
1309 }
1310 }
1312 if ( !(state & GDK_SHIFT_MASK) && _bbox ) {
1313 // screen pixels to snap center to bbox
1314 #define SNAP_DIST 5
1315 // FIXME: take from prefs
1316 double snap_dist = SNAP_DIST / _desktop->current_zoom();
1318 for (int i = 0; i < 2; i++) {
1319 if (fabs(pt[i] - _bbox->min()[i]) < snap_dist) {
1320 pt[i] = _bbox->min()[i];
1321 }
1322 if (fabs(pt[i] - _bbox->midpoint()[i]) < snap_dist) {
1323 pt[i] = _bbox->midpoint()[i];
1324 }
1325 if (fabs(pt[i] - _bbox->max()[i]) < snap_dist) {
1326 pt[i] = _bbox->max()[i];
1327 }
1328 }
1329 }
1331 // status text
1332 GString *xs = SP_PX_TO_METRIC_STRING(pt[Geom::X], _desktop->namedview->getDefaultMetric());
1333 GString *ys = SP_PX_TO_METRIC_STRING(pt[Geom::Y], _desktop->namedview->getDefaultMetric());
1334 _message_context.setF(Inkscape::NORMAL_MESSAGE, _("Move <b>center</b> to %s, %s"), xs->str, ys->str);
1335 g_string_free(xs, FALSE);
1336 g_string_free(ys, FALSE);
1338 return TRUE;
1339 }
1341 /*
1342 * handlers for handle movement
1343 *
1344 */
1346 void sp_sel_trans_stretch(Inkscape::SelTrans *seltrans, SPSelTransHandle const &handle, Geom::Point &pt, guint state)
1347 {
1348 seltrans->stretch(handle, pt, state);
1349 }
1351 void sp_sel_trans_scale(Inkscape::SelTrans *seltrans, SPSelTransHandle const &, Geom::Point &pt, guint state)
1352 {
1353 seltrans->scale(pt, state);
1354 }
1356 void sp_sel_trans_skew(Inkscape::SelTrans *seltrans, SPSelTransHandle const &handle, Geom::Point &pt, guint state)
1357 {
1358 seltrans->skew(handle, pt, state);
1359 }
1361 void sp_sel_trans_rotate(Inkscape::SelTrans *seltrans, SPSelTransHandle const &, Geom::Point &pt, guint state)
1362 {
1363 seltrans->rotate(pt, state);
1364 }
1366 void Inkscape::SelTrans::stretch(SPSelTransHandle const &/*handle*/, Geom::Point &/*pt*/, guint /*state*/)
1367 {
1368 transform(_absolute_affine, Geom::Point(0, 0)); // we have already accounted for origin, so pass 0,0
1369 }
1371 void Inkscape::SelTrans::scale(Geom::Point &/*pt*/, guint /*state*/)
1372 {
1373 transform(_absolute_affine, Geom::Point(0, 0)); // we have already accounted for origin, so pass 0,0
1374 }
1376 void Inkscape::SelTrans::skew(SPSelTransHandle const &/*handle*/, Geom::Point &/*pt*/, guint /*state*/)
1377 {
1378 transform(_relative_affine, _origin);
1379 }
1381 void Inkscape::SelTrans::rotate(Geom::Point &/*pt*/, guint /*state*/)
1382 {
1383 transform(_relative_affine, _origin);
1384 }
1386 void sp_sel_trans_center(Inkscape::SelTrans *seltrans, SPSelTransHandle const &, Geom::Point &pt, guint /*state*/)
1387 {
1388 seltrans->setCenter(pt);
1389 }
1392 void Inkscape::SelTrans::moveTo(Geom::Point const &xy, guint state)
1393 {
1394 SnapManager &m = _desktop->namedview->snap_manager;
1395 m.setup(_desktop, true, _items_const);
1397 /* The amount that we've moved by during this drag */
1398 Geom::Point dxy = xy - _point;
1400 bool const alt = (state & GDK_MOD1_MASK);
1401 bool const control = (state & GDK_CONTROL_MASK);
1402 bool const shift = (state & GDK_SHIFT_MASK);
1404 if (alt) {
1406 /* Alt pressed means keep offset: snap the moved distance to the grid.
1407 ** FIXME: this will snap to more than just the grid, nowadays.
1408 */
1410 m.freeSnapReturnByRef(SnapPreferences::SNAPPOINT_NODE, dxy);
1412 } else if (!shift) {
1414 /* We're snapping to things, possibly with a constraint to horizontal or
1415 ** vertical movement. Obtain a list of possible translations and then
1416 ** pick the smallest.
1417 */
1419 /* This will be our list of possible translations */
1420 std::list<Inkscape::SnappedPoint> s;
1422 if (control) {
1424 /* Snap to things, and also constrain to horizontal or vertical movement */
1426 for (unsigned int dim = 0; dim < 2; dim++) {
1427 // When doing a constrained translation, all points will move in the same direction, i.e.
1428 // either horizontally or vertically. Therefore we only have to specify the direction of
1429 // the constraint-line once. The constraint lines are parallel, but might not be colinear.
1430 // Therefore we will have to set the point through which the constraint-line runs
1431 // individually for each point to be snapped; this will be handled however by _snapTransformed()
1432 s.push_back(m.constrainedSnapTranslation(Inkscape::SnapPreferences::SNAPPOINT_BBOX,
1433 _bbox_points,
1434 _point,
1435 Inkscape::Snapper::ConstraintLine(component_vectors[dim]),
1436 dxy));
1438 s.push_back(m.constrainedSnapTranslation(Inkscape::SnapPreferences::SNAPPOINT_NODE,
1439 _snap_points,
1440 _point,
1441 Inkscape::Snapper::ConstraintLine(component_vectors[dim]),
1442 dxy));
1443 }
1445 } else {
1447 // Let's leave this timer code here for a while. I'll probably need it in the near future (Diederik van Lierop)
1448 /* GTimeVal starttime;
1449 GTimeVal endtime;
1450 g_get_current_time(&starttime); */
1452 /* Snap to things with no constraint */
1453 s.push_back(m.freeSnapTranslation(Inkscape::SnapPreferences::SNAPPOINT_BBOX, _bbox_points, _point, dxy));
1454 s.push_back(m.freeSnapTranslation(Inkscape::SnapPreferences::SNAPPOINT_NODE, _snap_points, _point, dxy));
1456 /*g_get_current_time(&endtime);
1457 double elapsed = ((((double)endtime.tv_sec - starttime.tv_sec) * G_USEC_PER_SEC + (endtime.tv_usec - starttime.tv_usec))) / 1000.0;
1458 std::cout << "Time spent snapping: " << elapsed << std::endl; */
1459 }
1461 /* Pick one */
1462 Inkscape::SnappedPoint best_snapped_point;
1463 for (std::list<Inkscape::SnappedPoint>::const_iterator i = s.begin(); i != s.end(); i++) {
1464 if (i->getSnapped()) {
1465 if (best_snapped_point.isOtherSnapBetter(*i, true)) {
1466 best_snapped_point = *i;
1467 dxy = i->getTransformation();
1468 }
1469 }
1470 }
1471 if (best_snapped_point.getSnapped()) {
1472 _desktop->snapindicator->set_new_snaptarget(best_snapped_point);
1473 } else {
1474 // We didn't snap, so remove any previous snap indicator
1475 _desktop->snapindicator->remove_snaptarget();
1476 if (control) {
1477 // If we didn't snap, then we should still constrain horizontally or vertically
1478 // (When we did snap, then this constraint has already been enforced by
1479 // calling constrainedSnapTranslation() above)
1480 if (fabs(dxy[Geom::X]) > fabs(dxy[Geom::Y])) {
1481 dxy[Geom::Y] = 0;
1482 } else {
1483 dxy[Geom::X] = 0;
1484 }
1485 }
1486 }
1487 }
1489 Geom::Matrix const move((Geom::Translate(dxy)));
1490 Geom::Point const norm(0, 0);
1491 transform(move, norm);
1493 // status text
1494 GString *xs = SP_PX_TO_METRIC_STRING(dxy[Geom::X], _desktop->namedview->getDefaultMetric());
1495 GString *ys = SP_PX_TO_METRIC_STRING(dxy[Geom::Y], _desktop->namedview->getDefaultMetric());
1496 _message_context.setF(Inkscape::NORMAL_MESSAGE, _("<b>Move</b> by %s, %s; with <b>Ctrl</b> to restrict to horizontal/vertical; with <b>Shift</b> to disable snapping"), xs->str, ys->str);
1497 g_string_free(xs, TRUE);
1498 g_string_free(ys, TRUE);
1499 }
1501 // Given a location of a handle at the visual bounding box, find the corresponding location at the
1502 // geometrical bounding box
1503 Geom::Point Inkscape::SelTrans::_getGeomHandlePos(Geom::Point const &visual_handle_pos)
1504 {
1505 if ( _snap_bbox_type == SPItem::GEOMETRIC_BBOX) {
1506 // When the selector tool is using geometric bboxes, then the handle is already
1507 // located at one of the geometric bbox corners
1508 return visual_handle_pos;
1509 }
1511 if (!_geometric_bbox) {
1512 //_getGeomHandlePos() can only be used after _geometric_bbox has been defined!
1513 return visual_handle_pos;
1514 }
1516 // Using the Geom::Rect constructor below ensures that "min() < max()", which is important
1517 // because this will also hold for _bbox, and which is required for get_scale_transform_with_stroke()
1518 Geom::Rect new_bbox = Geom::Rect(_origin_for_bboxpoints, visual_handle_pos); // new visual bounding box
1519 // Please note that the new_bbox might in fact be just a single line, for example when stretching (in
1520 // which case the handle and origin will be aligned vertically or horizontally)
1521 Geom::Point normalized_handle_pos = (visual_handle_pos - new_bbox.min()) * Geom::Scale(new_bbox.dimensions()).inverse();
1523 // Calculate the absolute affine while taking into account the scaling of the stroke width
1524 Inkscape::Preferences *prefs = Inkscape::Preferences::get();
1525 bool transform_stroke = prefs->getBool("/options/transform/stroke", true);
1526 Geom::Matrix abs_affine = get_scale_transform_with_stroke (*_bbox, _strokewidth, transform_stroke,
1527 new_bbox.min()[Geom::X], new_bbox.min()[Geom::Y], new_bbox.max()[Geom::X], new_bbox.max()[Geom::Y]);
1529 // Calculate the scaled geometrical bbox
1530 Geom::Rect new_geom_bbox = Geom::Rect(_geometric_bbox->min() * abs_affine, _geometric_bbox->max() * abs_affine);
1531 // Find the location of the handle on this new geometrical bbox
1532 return normalized_handle_pos * Geom::Scale(new_geom_bbox.dimensions()) + new_geom_bbox.min(); //new position of the geometric handle
1533 }
1535 Geom::Scale Inkscape::calcScaleFactors(Geom::Point const &initial_point, Geom::Point const &new_point, Geom::Point const &origin, bool const skew)
1536 {
1537 // Work out the new scale factors for the bbox
1539 Geom::Point const initial_delta = initial_point - origin;
1540 Geom::Point const new_delta = new_point - origin;
1541 Geom::Point const offset = new_point - initial_point;
1542 Geom::Scale scale(1, 1);
1544 for ( unsigned int i = 0 ; i < 2 ; i++ ) {
1545 if ( fabs(initial_delta[i]) > 1e-6 ) {
1546 if (skew) {
1547 scale[i] = offset[1-i] / initial_delta[i];
1548 } else {
1549 scale[i] = new_delta[i] / initial_delta[i];
1550 }
1551 }
1552 }
1554 return scale;
1555 }
1557 // Only for scaling/stretching
1558 Geom::Point Inkscape::SelTrans::_calcAbsAffineDefault(Geom::Scale const default_scale)
1559 {
1560 Geom::Matrix abs_affine = Geom::Translate(-_origin) * Geom::Matrix(default_scale) * Geom::Translate(_origin);
1561 Geom::Point new_bbox_min = _approximate_bbox->min() * abs_affine;
1562 Geom::Point new_bbox_max = _approximate_bbox->max() * abs_affine;
1564 bool transform_stroke = false;
1565 gdouble strokewidth = 0;
1567 if ( _snap_bbox_type != SPItem::GEOMETRIC_BBOX) {
1568 Inkscape::Preferences *prefs = Inkscape::Preferences::get();
1569 transform_stroke = prefs->getBool("/options/transform/stroke", true);
1570 strokewidth = _strokewidth;
1571 }
1573 _absolute_affine = get_scale_transform_with_stroke (*_approximate_bbox, strokewidth, transform_stroke,
1574 new_bbox_min[Geom::X], new_bbox_min[Geom::Y], new_bbox_max[Geom::X], new_bbox_max[Geom::Y]);
1576 // return the new handle position
1577 return ( _point - _origin ) * default_scale + _origin;
1578 }
1580 // Only for scaling/stretching
1581 Geom::Point Inkscape::SelTrans::_calcAbsAffineGeom(Geom::Scale const geom_scale)
1582 {
1583 _relative_affine = Geom::Matrix(geom_scale);
1584 _absolute_affine = Geom::Translate(-_origin_for_specpoints) * _relative_affine * Geom::Translate(_origin_for_specpoints);
1586 Inkscape::Preferences *prefs = Inkscape::Preferences::get();
1587 bool const transform_stroke = prefs->getBool("/options/transform/stroke", true);
1588 Geom::Rect visual_bbox = get_visual_bbox(_geometric_bbox, _absolute_affine, _strokewidth, transform_stroke);
1590 // return the new handle position
1591 return visual_bbox.min() + visual_bbox.dimensions() * Geom::Scale(_handle_x, _handle_y);
1592 }
1594 void Inkscape::SelTrans::_keepClosestPointOnly(std::vector<Geom::Point> &points, const Geom::Point &reference)
1595 {
1596 if (points.size() < 2) return;
1598 Geom::Point closest_point = Geom::Point(NR_HUGE, NR_HUGE);
1599 Geom::Coord closest_dist = NR_HUGE;
1601 for(std::vector<Geom::Point>::const_iterator i = points.begin(); i != points.end(); i++) {
1602 Geom::Coord dist = Geom::L2(*i - reference);
1603 if (i == points.begin() || dist < closest_dist) {
1604 closest_point = *i;
1605 closest_dist = dist;
1606 }
1607 }
1609 points.clear();
1610 points.push_back(closest_point);
1611 }
1613 /*
1614 Local Variables:
1615 mode:c++
1616 c-file-style:"stroustrup"
1617 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
1618 indent-tabs-mode:nil
1619 fill-column:99
1620 End:
1621 */
1622 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :