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 _snap_points.clear();
289 _snap_points = selection->getSnapPoints(&m.snapprefs);
290 std::vector<Geom::Point> snap_points_hull = selection->getSnapPointsConvexHull(&m.snapprefs);
291 if (_snap_points.size() > 100) {
292 /* Snapping a huge number of nodes will take way too long, so limit the number of snappable nodes
293 An average user would rarely ever try to snap such a large number of nodes anyway, because
294 (s)he could hardly discern which node would be snapping */
295 _snap_points = snap_points_hull;
296 // Unfortunately, by now we will have lost the font-baseline snappoints :-(
297 }
299 // Find bbox hulling all special points, which excludes stroke width. Here we need to include the
300 // path nodes, for example because a rectangle which has been converted to a path doesn't have
301 // any other special points
302 Geom::Rect snap_points_bbox;
303 if ( snap_points_hull.empty() == false ) {
304 std::vector<Geom::Point>::iterator i = snap_points_hull.begin();
305 snap_points_bbox = Geom::Rect(*i, *i);
306 i++;
307 while (i != snap_points_hull.end()) {
308 snap_points_bbox.expandTo(*i);
309 i++;
310 }
311 }
313 _bbox_points.clear();
314 if (_bbox) {
315 // ... and add the bbox corners to _bbox_points
316 for ( unsigned i = 0 ; i < 4 ; i++ ) {
317 _bbox_points.push_back(_bbox->corner(i));
318 }
319 // There are two separate "opposites" (i.e. opposite w.r.t. the handle being dragged):
320 // - one for snapping the boundingbox, which can be either visual or geometric
321 // - one for snapping the special points
322 // The "opposite" in case of a geometric boundingbox always coincides with the "opposite" for the special points
323 // These distinct "opposites" are needed in the snapmanager to avoid bugs such as #sf1540195 (in which
324 // a box is caught between two guides)
325 _opposite_for_bboxpoints = _bbox->min() + _bbox->dimensions() * Geom::Scale(1-x, 1-y);
326 _opposite_for_specpoints = snap_points_bbox.min() + snap_points_bbox.dimensions() * Geom::Scale(1-x, 1-y);
327 _opposite = _opposite_for_bboxpoints;
328 }
330 // When snapping the node closest to the mouse pointer is absolutely preferred over the closest snap
331 // (i.e. when weight == 1), then we will not even try to snap to other points and discard those other
332 // points immediately.
333 Inkscape::Preferences *prefs = Inkscape::Preferences::get();
334 if (prefs->getBool("/options/snapclosestonly/value", false)) {
335 if (m.snapprefs.getSnapModeNode()) {
336 _keepClosestPointOnly(_snap_points, p);
337 } else {
338 _snap_points.clear(); // don't keep any point
339 }
341 if (m.snapprefs.getSnapModeBBox()) {
342 _keepClosestPointOnly(_bbox_points, p);
343 } else {
344 _bbox_points.clear(); // don't keep any point
345 }
347 g_assert(_bbox_points.size() < 2 && _snap_points.size() < 2);
348 if (_snap_points.size() == 1 && _bbox_points.size() == 1) { //both vectors can only have either one or zero elements
349 // So we have exactly one bbox corner and one node left; now find out which is closest and delete the other one
350 if (Geom::L2(_snap_points.at(0) - p) < Geom::L2(_bbox_points.at(0) - p)) {
351 _bbox_points.clear();
352 } else {
353 _snap_points.clear();
354 }
355 }
357 // Now either _bbox_points or _snap_points has a single element, the other one has zero..... or both have zero elements
358 g_assert((_bbox_points.size() + _snap_points.size()) < 2);
359 if (_bbox_points.size() == 1) {
360 _desktop->snapindicator->set_new_snapsource(_bbox_points.at(0));
361 } else if (_snap_points.size() == 1){
362 _desktop->snapindicator->set_new_snapsource(_snap_points.at(0));
363 }
364 }
366 // The lines below are useful for debugging any snapping issues, as they'll spit out all points that are considered for snapping
368 /*std::cout << "Number of snap points: " << _snap_points.size() << std::endl;
369 for (std::vector<Geom::Point>::const_iterator i = _snap_points.begin(); i != _snap_points.end(); i++)
370 {
371 std::cout << " " << *i << std::endl;
372 }
374 std::cout << "Number of bbox points: " << _bbox_points.size() << std::endl;
375 for (std::vector<Geom::Point>::const_iterator i = _bbox_points.begin(); i != _bbox_points.end(); i++)
376 {
377 std::cout << " " << *i << std::endl;
378 }*/
380 if ((x != -1) && (y != -1)) {
381 sp_canvas_item_show(_norm);
382 sp_canvas_item_show(_grip);
383 }
385 if (_show == SHOW_OUTLINE) {
386 for (int i = 0; i < 4; i++)
387 sp_canvas_item_show(_l[i]);
388 }
390 _updateHandles();
391 g_return_if_fail(_stamp_cache == NULL);
392 }
394 void Inkscape::SelTrans::transform(Geom::Matrix const &rel_affine, Geom::Point const &norm)
395 {
396 g_return_if_fail(_grabbed);
397 g_return_if_fail(!_empty);
399 Geom::Matrix const affine( Geom::Translate(-norm) * rel_affine * Geom::Translate(norm) );
401 if (_show == SHOW_CONTENT) {
402 // update the content
403 for (unsigned i = 0; i < _items.size(); i++) {
404 SPItem &item = *_items[i];
405 Geom::Matrix const &prev_transform = _items_affines[i];
406 sp_item_set_i2d_affine(&item, prev_transform * affine);
407 }
408 } else {
409 if (_bbox) {
410 Geom::Point p[4];
411 /* update the outline */
412 for (unsigned i = 0 ; i < 4 ; i++) {
413 p[i] = _bbox->corner(i) * affine;
414 }
415 for (unsigned i = 0 ; i < 4 ; i++) {
416 sp_ctrlline_set_coords(SP_CTRLLINE(_l[i]), p[i], p[(i+1)%4]);
417 }
418 }
419 }
421 _current_relative_affine = affine;
422 _changed = true;
423 _updateHandles();
424 }
426 void Inkscape::SelTrans::ungrab()
427 {
428 g_return_if_fail(_grabbed);
429 _grabbed = false;
430 _show_handles = true;
432 Inkscape::Selection *selection = sp_desktop_selection(_desktop);
433 _updateVolatileState();
435 for (unsigned i = 0; i < _items.size(); i++) {
436 sp_object_unref(SP_OBJECT(_items[i]), NULL);
437 }
439 sp_canvas_item_hide(_norm);
440 sp_canvas_item_hide(_grip);
442 if (_show == SHOW_OUTLINE) {
443 for (int i = 0; i < 4; i++)
444 sp_canvas_item_hide(_l[i]);
445 }
447 if (_stamp_cache) {
448 g_slist_free(_stamp_cache);
449 _stamp_cache = NULL;
450 }
452 _message_context.clear();
454 if (!_empty && _changed) {
455 sp_selection_apply_affine(selection, _current_relative_affine, (_show == SHOW_OUTLINE)? true : false);
456 if (_center) {
457 *_center *= _current_relative_affine;
458 _center_is_set = true;
459 }
461 // If dragging showed content live, sp_selection_apply_affine cannot change the centers
462 // appropriately - it does not know the original positions of the centers (all objects already have
463 // the new bboxes). So we need to reset the centers from our saved array.
464 if (_show != SHOW_OUTLINE && !_current_relative_affine.isTranslation()) {
465 for (unsigned i = 0; i < _items_centers.size(); i++) {
466 SPItem *currentItem = _items[i];
467 if (currentItem->isCenterSet()) { // only if it's already set
468 currentItem->setCenter (_items_centers[i] * _current_relative_affine);
469 SP_OBJECT(currentItem)->updateRepr();
470 }
471 }
472 }
474 _items.clear();
475 _items_const.clear();
476 _items_affines.clear();
477 _items_centers.clear();
479 if (_current_relative_affine.isTranslation()) {
480 sp_document_done(sp_desktop_document(_desktop), SP_VERB_CONTEXT_SELECT,
481 _("Move"));
482 } else if (_current_relative_affine.isScale()) {
483 sp_document_done(sp_desktop_document(_desktop), SP_VERB_CONTEXT_SELECT,
484 _("Scale"));
485 } else if (_current_relative_affine.isRotation()) {
486 sp_document_done(sp_desktop_document(_desktop), SP_VERB_CONTEXT_SELECT,
487 _("Rotate"));
488 } else {
489 sp_document_done(sp_desktop_document(_desktop), SP_VERB_CONTEXT_SELECT,
490 _("Skew"));
491 }
493 } else {
495 if (_center_is_set) {
496 // we were dragging center; update reprs and commit undoable action
497 for (GSList const *l = _desktop->selection->itemList(); l; l = l->next) {
498 SPItem *it = (SPItem*)SP_OBJECT(l->data);
499 SP_OBJECT(it)->updateRepr();
500 }
501 sp_document_done (sp_desktop_document(_desktop), SP_VERB_CONTEXT_SELECT,
502 _("Set center"));
503 }
505 _items.clear();
506 _items_const.clear();
507 _items_affines.clear();
508 _items_centers.clear();
509 _updateHandles();
510 }
511 }
513 /* fixme: This is really bad, as we compare positions for each stamp (Lauris) */
514 /* fixme: IMHO the best way to keep sort cache would be to implement timestamping at last */
516 void Inkscape::SelTrans::stamp()
517 {
518 Inkscape::Selection *selection = sp_desktop_selection(_desktop);
520 bool fixup = !_grabbed;
521 if ( fixup && _stamp_cache ) {
522 // TODO - give a proper fix. Simple temproary work-around for the grab() issue
523 g_slist_free(_stamp_cache);
524 _stamp_cache = NULL;
525 }
527 /* stamping mode */
528 if (!_empty) {
529 GSList *l;
530 if (_stamp_cache) {
531 l = _stamp_cache;
532 } else {
533 /* Build cache */
534 l = g_slist_copy((GSList *) selection->itemList());
535 l = g_slist_sort(l, (GCompareFunc) sp_object_compare_position);
536 _stamp_cache = l;
537 }
539 while (l) {
540 SPItem *original_item = SP_ITEM(l->data);
541 Inkscape::XML::Node *original_repr = SP_OBJECT_REPR(original_item);
543 // remember the position of the item
544 gint pos = original_repr->position();
545 // remember parent
546 Inkscape::XML::Node *parent = sp_repr_parent(original_repr);
548 Inkscape::XML::Node *copy_repr = original_repr->duplicate(parent->document());
550 // add the new repr to the parent
551 parent->appendChild(copy_repr);
552 // move to the saved position
553 copy_repr->setPosition(pos > 0 ? pos : 0);
555 SPItem *copy_item = (SPItem *) sp_desktop_document(_desktop)->getObjectByRepr(copy_repr);
557 Geom::Matrix const *new_affine;
558 if (_show == SHOW_OUTLINE) {
559 Geom::Matrix const i2d(sp_item_i2d_affine(original_item));
560 Geom::Matrix const i2dnew( i2d * _current_relative_affine );
561 sp_item_set_i2d_affine(copy_item, i2dnew);
562 new_affine = ©_item->transform;
563 } else {
564 new_affine = &original_item->transform;
565 }
567 sp_item_write_transform(copy_item, copy_repr, *new_affine);
569 if ( copy_item->isCenterSet() && _center ) {
570 copy_item->setCenter(*_center * _current_relative_affine);
571 }
573 Inkscape::GC::release(copy_repr);
574 l = l->next;
575 }
576 sp_document_done(sp_desktop_document(_desktop), SP_VERB_CONTEXT_SELECT,
577 _("Stamp"));
578 }
580 if ( fixup && _stamp_cache ) {
581 // TODO - give a proper fix. Simple temproary work-around for the grab() issue
582 g_slist_free(_stamp_cache);
583 _stamp_cache = NULL;
584 }
585 }
587 void Inkscape::SelTrans::_updateHandles()
588 {
589 if ( !_show_handles || _empty )
590 {
591 sp_remove_handles(_shandle, 8);
592 sp_remove_handles(_rhandle, 8);
593 sp_remove_handles(&_chandle, 1);
594 return;
595 }
597 // center handle
598 if ( _chandle == NULL ) {
599 _chandle = sp_knot_new(_desktop, _("<b>Center</b> of rotation and skewing: drag to reposition; scaling with Shift also uses this center"));
601 _chandle->setShape (SP_CTRL_SHAPE_BITMAP);
602 _chandle->setSize (13);
603 _chandle->setAnchor (handle_center.anchor);
604 _chandle->setMode (SP_CTRL_MODE_XOR);
605 _chandle->setFill(0x00000000, 0x00000000, 0x00000000);
606 _chandle->setStroke(0x000000ff, 0xff0000b0, 0xff0000b0);
607 _chandle->setPixbuf(handles[handle_center.control]);
608 sp_knot_update_ctrl(_chandle);
610 g_signal_connect(G_OBJECT(_chandle), "request",
611 G_CALLBACK(sp_sel_trans_handle_request), (gpointer) &handle_center);
612 g_signal_connect(G_OBJECT(_chandle), "moved",
613 G_CALLBACK(sp_sel_trans_handle_new_event), (gpointer) &handle_center);
614 g_signal_connect(G_OBJECT(_chandle), "grabbed",
615 G_CALLBACK(sp_sel_trans_handle_grab), (gpointer) &handle_center);
616 g_signal_connect(G_OBJECT(_chandle), "ungrabbed",
617 G_CALLBACK(sp_sel_trans_handle_ungrab), (gpointer) &handle_center);
618 g_signal_connect(G_OBJECT(_chandle), "clicked",
619 G_CALLBACK(sp_sel_trans_handle_click), (gpointer) &handle_center);
620 }
622 sp_remove_handles(&_chandle, 1);
623 if ( _state == STATE_SCALE ) {
624 sp_remove_handles(_rhandle, 8);
625 _showHandles(_shandle, handles_scale, 8,
626 _("<b>Squeeze or stretch</b> selection; with <b>Ctrl</b> to scale uniformly; with <b>Shift</b> to scale around rotation center"),
627 _("<b>Scale</b> selection; with <b>Ctrl</b> to scale uniformly; with <b>Shift</b> to scale around rotation center"));
628 } else {
629 sp_remove_handles(_shandle, 8);
630 _showHandles(_rhandle, handles_rotate, 8,
631 _("<b>Skew</b> selection; with <b>Ctrl</b> to snap angle; with <b>Shift</b> to skew around the opposite side"),
632 _("<b>Rotate</b> selection; with <b>Ctrl</b> to snap angle; with <b>Shift</b> to rotate around the opposite corner"));
633 }
635 if (!_center_is_set) {
636 _center = _desktop->selection->center();
637 _center_is_set = true;
638 }
640 if ( _state == STATE_SCALE || !_center ) {
641 sp_knot_hide(_chandle);
642 } else {
643 sp_knot_show(_chandle);
644 sp_knot_moveto(_chandle, *_center);
645 }
646 }
648 void Inkscape::SelTrans::_updateVolatileState()
649 {
650 Inkscape::Selection *selection = sp_desktop_selection(_desktop);
651 _empty = selection->isEmpty();
653 if (_empty) {
654 return;
655 }
657 //Update the bboxes
658 _bbox = selection->bounds(_snap_bbox_type);
659 _approximate_bbox = selection->bounds(SPItem::APPROXIMATE_BBOX);
661 if (!_bbox) {
662 _empty = true;
663 return;
664 }
666 _strokewidth = stroke_average_width (selection->itemList());
667 }
669 static void sp_remove_handles(SPKnot *knot[], gint num)
670 {
671 for (int i = 0; i < num; i++) {
672 if (knot[i] != NULL) {
673 sp_knot_hide(knot[i]);
674 }
675 }
676 }
678 void Inkscape::SelTrans::_showHandles(SPKnot *knot[], SPSelTransHandle const handle[], gint num,
679 gchar const *even_tip, gchar const *odd_tip)
680 {
681 g_return_if_fail( !_empty );
683 for (int i = 0; i < num; i++) {
684 if (knot[i] == NULL) {
685 knot[i] = sp_knot_new(_desktop, i % 2 ? even_tip : odd_tip);
687 knot[i]->setShape (SP_CTRL_SHAPE_BITMAP);
688 knot[i]->setSize (13);
689 knot[i]->setAnchor (handle[i].anchor);
690 knot[i]->setMode (SP_CTRL_MODE_XOR);
691 knot[i]->setFill(0x000000ff, 0x00ff6600, 0x00ff6600); // inversion, green, green
692 knot[i]->setStroke(0x000000ff, 0x000000ff, 0x000000ff); // inversion
693 knot[i]->setPixbuf(handles[handle[i].control]);
694 sp_knot_update_ctrl(knot[i]);
696 g_signal_connect(G_OBJECT(knot[i]), "request",
697 G_CALLBACK(sp_sel_trans_handle_request), (gpointer) &handle[i]);
698 g_signal_connect(G_OBJECT(knot[i]), "moved",
699 G_CALLBACK(sp_sel_trans_handle_new_event), (gpointer) &handle[i]);
700 g_signal_connect(G_OBJECT(knot[i]), "grabbed",
701 G_CALLBACK(sp_sel_trans_handle_grab), (gpointer) &handle[i]);
702 g_signal_connect(G_OBJECT(knot[i]), "ungrabbed",
703 G_CALLBACK(sp_sel_trans_handle_ungrab), (gpointer) &handle[i]);
704 g_signal_connect(G_OBJECT(knot[i]), "event", G_CALLBACK(sp_seltrans_handle_event), (gpointer) &handle[i]);
705 }
706 sp_knot_show(knot[i]);
708 Geom::Point const handle_pt(handle[i].x, handle[i].y);
709 // shouldn't have nullary bbox, but knots
710 g_assert(_bbox);
711 Geom::Point p( _bbox->min()
712 + ( _bbox->dimensions()
713 * Geom::Scale(handle_pt) ) );
715 sp_knot_moveto(knot[i], p);
716 }
717 }
719 static void sp_sel_trans_handle_grab(SPKnot *knot, guint state, gpointer data)
720 {
721 SP_SELECT_CONTEXT(knot->desktop->event_context)->_seltrans->handleGrab(
722 knot, state, *(SPSelTransHandle const *) data
723 );
724 }
726 static void sp_sel_trans_handle_ungrab(SPKnot *knot, guint /*state*/, gpointer /*data*/)
727 {
728 SP_SELECT_CONTEXT(knot->desktop->event_context)->_seltrans->ungrab();
729 }
731 static void sp_sel_trans_handle_new_event(SPKnot *knot, Geom::Point *position, guint state, gpointer data)
732 {
733 SP_SELECT_CONTEXT(knot->desktop->event_context)->_seltrans->handleNewEvent(
734 knot, position, state, *(SPSelTransHandle const *) data
735 );
736 }
738 static gboolean sp_sel_trans_handle_request(SPKnot *knot, Geom::Point *position, guint state, gboolean *data)
739 {
740 return SP_SELECT_CONTEXT(knot->desktop->event_context)->_seltrans->handleRequest(
741 knot, position, state, *(SPSelTransHandle const *) data
742 );
743 }
745 static void sp_sel_trans_handle_click(SPKnot *knot, guint state, gpointer data)
746 {
747 SP_SELECT_CONTEXT(knot->desktop->event_context)->_seltrans->handleClick(
748 knot, state, *(SPSelTransHandle const *) data
749 );
750 }
752 void Inkscape::SelTrans::handleClick(SPKnot */*knot*/, guint state, SPSelTransHandle const &handle)
753 {
754 switch (handle.anchor) {
755 case GTK_ANCHOR_CENTER:
756 if (state & GDK_SHIFT_MASK) {
757 // Unset the center position for all selected items
758 for (GSList const *l = _desktop->selection->itemList(); l; l = l->next) {
759 SPItem *it = (SPItem*)(SP_OBJECT(l->data));
760 it->unsetCenter();
761 SP_OBJECT(it)->updateRepr();
762 _center_is_set = false; // center has changed
763 _updateHandles();
764 }
765 sp_document_done (sp_desktop_document(_desktop), SP_VERB_CONTEXT_SELECT,
766 _("Reset center"));
767 }
768 break;
769 default:
770 break;
771 }
772 }
774 void Inkscape::SelTrans::handleGrab(SPKnot *knot, guint /*state*/, SPSelTransHandle const &handle)
775 {
776 switch (handle.anchor) {
777 case GTK_ANCHOR_CENTER:
778 g_object_set(G_OBJECT(_grip),
779 "shape", SP_CTRL_SHAPE_BITMAP,
780 "size", 13.0,
781 NULL);
782 sp_canvas_item_show(_grip);
783 break;
784 default:
785 g_object_set(G_OBJECT(_grip),
786 "shape", SP_CTRL_SHAPE_CROSS,
787 "size", 7.0,
788 NULL);
789 sp_canvas_item_show(_norm);
790 sp_canvas_item_show(_grip);
792 break;
793 }
795 grab(sp_knot_position(knot), handle.x, handle.y, FALSE);
796 }
799 void Inkscape::SelTrans::handleNewEvent(SPKnot *knot, Geom::Point *position, guint state, SPSelTransHandle const &handle)
800 {
801 if (!SP_KNOT_IS_GRABBED(knot)) {
802 return;
803 }
805 // in case items have been unhooked from the document, don't
806 // try to continue processing events for them.
807 for (unsigned int i = 0; i < _items.size(); i++) {
808 if (!SP_OBJECT_DOCUMENT(SP_OBJECT(_items[i])) ) {
809 return;
810 }
811 }
813 handle.action(this, handle, *position, state);
814 }
817 gboolean Inkscape::SelTrans::handleRequest(SPKnot *knot, Geom::Point *position, guint state, SPSelTransHandle const &handle)
818 {
819 if (!SP_KNOT_IS_GRABBED(knot)) {
820 return TRUE;
821 }
823 knot->desktop->setPosition(*position);
825 // When holding shift while rotating or skewing, the transformation will be
826 // relative to the point opposite of the handle; otherwise it will be relative
827 // to the center as set for the selection
828 if ((!(state & GDK_SHIFT_MASK) == !(_state == STATE_ROTATE)) && (&handle != &handle_center)) {
829 _origin = _opposite;
830 _origin_for_bboxpoints = _opposite_for_bboxpoints;
831 _origin_for_specpoints = _opposite_for_specpoints;
832 } else if (_center) {
833 _origin = *_center;
834 _origin_for_bboxpoints = *_center;
835 _origin_for_specpoints = *_center;
836 } else {
837 // FIXME
838 return TRUE;
839 }
840 if (handle.request(this, handle, *position, state)) {
841 sp_knot_set_position(knot, *position, state);
842 SP_CTRL(_grip)->moveto(*position);
843 SP_CTRL(_norm)->moveto(_origin);
844 }
846 return TRUE;
847 }
850 void Inkscape::SelTrans::_selChanged(Inkscape::Selection */*selection*/)
851 {
852 if (!_grabbed) {
853 Inkscape::Preferences *prefs = Inkscape::Preferences::get();
854 // reread in case it changed on the fly:
855 int prefs_bbox = prefs->getBool("/tools/bounding_box");
856 _snap_bbox_type = !prefs_bbox ?
857 SPItem::APPROXIMATE_BBOX : SPItem::GEOMETRIC_BBOX;
858 //SPItem::APPROXIMATE_BBOX will be replaced by SPItem::VISUAL_BBOX, as soon as the latter is implemented properly
860 _updateVolatileState();
861 _current_relative_affine.setIdentity();
862 _center_is_set = false; // center(s) may have changed
863 _updateHandles();
864 }
865 }
867 void Inkscape::SelTrans::_selModified(Inkscape::Selection */*selection*/, guint /*flags*/)
868 {
869 if (!_grabbed) {
870 _updateVolatileState();
871 _current_relative_affine.setIdentity();
873 // reset internal flag
874 _changed = false;
876 _center_is_set = false; // center(s) may have changed
878 _updateHandles();
879 }
880 }
882 /*
883 * handlers for handle move-request
884 */
886 /** Returns -1 or 1 according to the sign of x. Returns 1 for 0 and NaN. */
887 static double sign(double const x)
888 {
889 return ( x < 0
890 ? -1
891 : 1 );
892 }
894 gboolean sp_sel_trans_scale_request(Inkscape::SelTrans *seltrans,
895 SPSelTransHandle const &, Geom::Point &pt, guint state)
896 {
897 return seltrans->scaleRequest(pt, state);
898 }
900 gboolean sp_sel_trans_stretch_request(Inkscape::SelTrans *seltrans,
901 SPSelTransHandle const &handle, Geom::Point &pt, guint state)
902 {
903 return seltrans->stretchRequest(handle, pt, state);
904 }
906 gboolean sp_sel_trans_skew_request(Inkscape::SelTrans *seltrans,
907 SPSelTransHandle const &handle, Geom::Point &pt, guint state)
908 {
909 return seltrans->skewRequest(handle, pt, state);
910 }
912 gboolean sp_sel_trans_rotate_request(Inkscape::SelTrans *seltrans,
913 SPSelTransHandle const &, Geom::Point &pt, guint state)
914 {
915 return seltrans->rotateRequest(pt, state);
916 }
918 gboolean sp_sel_trans_center_request(Inkscape::SelTrans *seltrans,
919 SPSelTransHandle const &, Geom::Point &pt, guint state)
920 {
921 return seltrans->centerRequest(pt, state);
922 }
924 gboolean Inkscape::SelTrans::scaleRequest(Geom::Point &pt, guint state)
925 {
927 // Calculate the scale factors, which can be either visual or geometric
928 // depending on which type of bbox is currently being used (see preferences -> selector tool)
929 Geom::Scale default_scale = calcScaleFactors(_point, pt, _origin);
931 // Find the scale factors for the geometric bbox
932 Geom::Point pt_geom = _getGeomHandlePos(pt);
933 Geom::Scale geom_scale = calcScaleFactors(_point_geom, pt_geom, _origin_for_specpoints);
935 _absolute_affine = Geom::identity(); //Initialize the scaler
937 if (state & GDK_MOD1_MASK) { // scale by an integer multiplier/divider
938 // We're scaling either the visual or the geometric bbox here (see the comment above)
939 for ( unsigned int i = 0 ; i < 2 ; i++ ) {
940 if (fabs(default_scale[i]) > 1) {
941 default_scale[i] = round(default_scale[i]);
942 } else if (default_scale[i] != 0) {
943 default_scale[i] = 1/round(1/(MIN(default_scale[i], 10)));
944 }
945 }
946 // Update the knot position
947 pt = _calcAbsAffineDefault(default_scale);
948 // When scaling by an integer, snapping is not needed
949 } else {
950 // In all other cases we should try to snap now
951 SnapManager &m = _desktop->namedview->snap_manager;
952 m.setup(_desktop, false, _items_const);
954 Inkscape::SnappedPoint bb, sn;
955 Geom::Coord bd(NR_HUGE);
956 Geom::Coord sd(NR_HUGE);
958 if ((state & GDK_CONTROL_MASK) || _desktop->isToolboxButtonActive ("lock")) {
959 // Scale is locked to a 1:1 aspect ratio, so that s[X] must be made to equal s[Y].
960 //
961 // The aspect-ratio must be locked before snapping
962 if (fabs(default_scale[Geom::X]) > fabs(default_scale[Geom::Y])) {
963 default_scale[Geom::X] = fabs(default_scale[Geom::Y]) * sign(default_scale[Geom::X]);
964 geom_scale[Geom::X] = fabs(geom_scale[Geom::Y]) * sign(geom_scale[Geom::X]);
965 } else {
966 default_scale[Geom::Y] = fabs(default_scale[Geom::X]) * sign(default_scale[Geom::Y]);
967 geom_scale[Geom::Y] = fabs(geom_scale[Geom::X]) * sign(geom_scale[Geom::Y]);
968 }
970 // Snap along a suitable constraint vector from the origin.
971 bb = m.constrainedSnapScale(SnapPreferences::SNAPPOINT_BBOX, _bbox_points, _point, default_scale, _origin_for_bboxpoints);
972 sn = m.constrainedSnapScale(SnapPreferences::SNAPPOINT_NODE, _snap_points, _point, geom_scale, _origin_for_specpoints);
974 /* Choose the smaller difference in scale. Since s[X] == s[Y] we can
975 ** just compare difference in s[X].
976 */
977 bd = bb.getSnapped() ? fabs(bb.getTransformation()[Geom::X] - default_scale[Geom::X]) : NR_HUGE;
978 sd = sn.getSnapped() ? fabs(sn.getTransformation()[Geom::X] - geom_scale[Geom::X]) : NR_HUGE;
979 } else {
980 /* Scale aspect ratio is unlocked */
981 bb = m.freeSnapScale(SnapPreferences::SNAPPOINT_BBOX, _bbox_points, _point, default_scale, _origin_for_bboxpoints);
982 sn = m.freeSnapScale(SnapPreferences::SNAPPOINT_NODE, _snap_points, _point, geom_scale, _origin_for_specpoints);
984 /* Pick the snap that puts us closest to the original scale */
985 bd = bb.getSnapped() ? fabs(Geom::L2(bb.getTransformation()) - Geom::L2(Geom::Point(default_scale[Geom::X], default_scale[Geom::Y]))) : NR_HUGE;
986 sd = sn.getSnapped() ? fabs(Geom::L2(sn.getTransformation()) - Geom::L2(Geom::Point(geom_scale[Geom::X], geom_scale[Geom::Y]))) : NR_HUGE;
987 }
989 if (!(bb.getSnapped() || sn.getSnapped())) {
990 // We didn't snap at all! Don't update the handle position, just calculate the new transformation
991 _calcAbsAffineDefault(default_scale);
992 _desktop->snapindicator->remove_snaptarget();
993 } else if (bd < sd) {
994 // We snapped the bbox (which is either visual or geometric)
995 _desktop->snapindicator->set_new_snaptarget(bb);
996 default_scale = Geom::Scale(bb.getTransformation());
997 // Calculate the new transformation and update the handle position
998 pt = _calcAbsAffineDefault(default_scale);
999 } else {
1000 _desktop->snapindicator->set_new_snaptarget(sn);
1001 // We snapped the special points (e.g. nodes), which are not at the visual bbox
1002 // The handle location however (pt) might however be at the visual bbox, so we
1003 // will have to calculate pt taking the stroke width into account
1004 geom_scale = Geom::Scale(sn.getTransformation());
1005 pt = _calcAbsAffineGeom(geom_scale);
1006 }
1007 }
1009 /* Status text */
1010 _message_context.setF(Inkscape::IMMEDIATE_MESSAGE,
1011 _("<b>Scale</b>: %0.2f%% x %0.2f%%; with <b>Ctrl</b> to lock ratio"),
1012 100 * _absolute_affine[0], 100 * _absolute_affine[3]);
1014 return TRUE;
1015 }
1017 gboolean Inkscape::SelTrans::stretchRequest(SPSelTransHandle const &handle, Geom::Point &pt, guint state)
1018 {
1019 Geom::Dim2 axis, perp;
1020 switch (handle.cursor) {
1021 case GDK_TOP_SIDE:
1022 case GDK_BOTTOM_SIDE:
1023 axis = Geom::Y;
1024 perp = Geom::X;
1025 break;
1026 case GDK_LEFT_SIDE:
1027 case GDK_RIGHT_SIDE:
1028 axis = Geom::X;
1029 perp = Geom::Y;
1030 break;
1031 default:
1032 g_assert_not_reached();
1033 return TRUE;
1034 };
1036 // Calculate the scale factors, which can be either visual or geometric
1037 // depending on which type of bbox is currently being used (see preferences -> selector tool)
1038 Geom::Scale default_scale = calcScaleFactors(_point, pt, _origin);
1039 default_scale[perp] = 1;
1041 // Find the scale factors for the geometric bbox
1042 Geom::Point pt_geom = _getGeomHandlePos(pt);
1043 Geom::Scale geom_scale = calcScaleFactors(_point_geom, pt_geom, _origin_for_specpoints);
1044 geom_scale[perp] = 1;
1046 _absolute_affine = Geom::identity(); //Initialize the scaler
1048 if (state & GDK_MOD1_MASK) { // stretch by an integer multiplier/divider
1049 if (fabs(default_scale[axis]) > 1) {
1050 default_scale[axis] = round(default_scale[axis]);
1051 } else if (default_scale[axis] != 0) {
1052 default_scale[axis] = 1/round(1/(MIN(default_scale[axis], 10)));
1053 }
1054 // Calculate the new transformation and update the handle position
1055 pt = _calcAbsAffineDefault(default_scale);
1056 // When stretching by an integer, snapping is not needed
1057 } else {
1058 // In all other cases we should try to snap now
1060 SnapManager &m = _desktop->namedview->snap_manager;
1061 m.setup(_desktop, false, _items_const);
1063 Inkscape::SnappedPoint bb, sn;
1064 g_assert(bb.getSnapped() == false); // Check initialization to catch any regression
1065 Geom::Coord bd(NR_HUGE);
1066 Geom::Coord sd(NR_HUGE);
1068 bool symmetrical = state & GDK_CONTROL_MASK;
1070 bb = m.constrainedSnapStretch(SnapPreferences::SNAPPOINT_BBOX, _bbox_points, _point, Geom::Coord(default_scale[axis]), _origin_for_bboxpoints, Geom::Dim2(axis), symmetrical);
1071 sn = m.constrainedSnapStretch(SnapPreferences::SNAPPOINT_NODE, _snap_points, _point, Geom::Coord(geom_scale[axis]), _origin_for_specpoints, Geom::Dim2(axis), symmetrical);
1073 if (bb.getSnapped()) {
1074 // We snapped the bbox (which is either visual or geometric)
1075 bd = fabs(bb.getTransformation()[axis] - default_scale[axis]);
1076 default_scale[axis] = bb.getTransformation()[axis];
1077 }
1079 if (sn.getSnapped()) {
1080 sd = fabs(sn.getTransformation()[axis] - geom_scale[axis]);
1081 geom_scale[axis] = sn.getTransformation()[axis];
1082 }
1084 if (symmetrical) {
1085 // on ctrl, apply symmetrical scaling instead of stretching
1086 // Preserve aspect ratio, but never flip in the dimension not being edited (by using fabs())
1087 default_scale[perp] = fabs(default_scale[axis]);
1088 geom_scale[perp] = fabs(geom_scale[axis]);
1089 }
1091 if (!(bb.getSnapped() || sn.getSnapped())) {
1092 // We didn't snap at all! Don't update the handle position, just calculate the new transformation
1093 _calcAbsAffineDefault(default_scale);
1094 _desktop->snapindicator->remove_snaptarget();
1095 } else if (bd < sd) {
1096 _desktop->snapindicator->set_new_snaptarget(bb);
1097 // Calculate the new transformation and update the handle position
1098 pt = _calcAbsAffineDefault(default_scale);
1099 } else {
1100 _desktop->snapindicator->set_new_snaptarget(sn);
1101 // We snapped the special points (e.g. nodes), which are not at the visual bbox
1102 // The handle location however (pt) might however be at the visual bbox, so we
1103 // will have to calculate pt taking the stroke width into account
1104 pt = _calcAbsAffineGeom(geom_scale);
1105 }
1106 }
1108 // status text
1109 _message_context.setF(Inkscape::IMMEDIATE_MESSAGE,
1110 _("<b>Scale</b>: %0.2f%% x %0.2f%%; with <b>Ctrl</b> to lock ratio"),
1111 100 * _absolute_affine[0], 100 * _absolute_affine[3]);
1113 return TRUE;
1114 }
1116 gboolean Inkscape::SelTrans::skewRequest(SPSelTransHandle const &handle, Geom::Point &pt, guint state)
1117 {
1118 /* When skewing (or rotating):
1119 * 1) the stroke width will not change. This makes life much easier because we don't have to
1120 * account for that (like for scaling or stretching). As a consequence, all points will
1121 * have the same origin for the transformation and for the snapping.
1122 * 2) When holding shift, the transformation will be relative to the point opposite of
1123 * the handle; otherwise it will be relative to the center as set for the selection
1124 */
1126 Geom::Dim2 dim_a;
1127 Geom::Dim2 dim_b;
1129 switch (handle.cursor) {
1130 case GDK_SB_H_DOUBLE_ARROW:
1131 dim_a = Geom::Y;
1132 dim_b = Geom::X;
1133 break;
1134 case GDK_SB_V_DOUBLE_ARROW:
1135 dim_a = Geom::X;
1136 dim_b = Geom::Y;
1137 break;
1138 default:
1139 g_assert_not_reached();
1140 abort();
1141 break;
1142 }
1144 Geom::Point const initial_delta = _point - _origin;
1146 if (fabs(initial_delta[dim_a]) < 1e-15) {
1147 return false;
1148 }
1150 // Calculate the scale factors, which can be either visual or geometric
1151 // depending on which type of bbox is currently being used (see preferences -> selector tool)
1152 Geom::Scale scale = calcScaleFactors(_point, pt, _origin, false);
1153 Geom::Scale skew = calcScaleFactors(_point, pt, _origin, true);
1154 scale[dim_b] = 1;
1155 skew[dim_b] = 1;
1157 if (fabs(scale[dim_a]) < 1) {
1158 // Prevent shrinking of the selected object, while allowing mirroring
1159 scale[dim_a] = sign(scale[dim_a]);
1160 } else {
1161 // Allow expanding of the selected object by integer multiples
1162 scale[dim_a] = floor(scale[dim_a] + 0.5);
1163 }
1165 double radians = atan(skew[dim_a] / scale[dim_a]);
1167 if (state & GDK_CONTROL_MASK) {
1168 Inkscape::Preferences *prefs = Inkscape::Preferences::get();
1169 // Snap to defined angle increments
1170 int snaps = prefs->getInt("/options/rotationsnapsperpi/value", 12);
1171 if (snaps) {
1172 double sections = floor(radians * snaps / M_PI + .5);
1173 if (fabs(sections) >= snaps / 2) {
1174 sections = sign(sections) * (snaps / 2 - 1);
1175 }
1176 radians = (M_PI / snaps) * sections;
1177 }
1178 skew[dim_a] = tan(radians) * scale[dim_a];
1179 } else {
1180 // Snap to objects, grids, guides
1182 SnapManager &m = _desktop->namedview->snap_manager;
1183 m.setup(_desktop, false, _items_const);
1185 Inkscape::Snapper::ConstraintLine const constraint(component_vectors[dim_b]);
1186 // When skewing, we cannot snap the corners of the bounding box, see the comment in "constrainedSnapSkew" for details
1187 Geom::Point const s(skew[dim_a], scale[dim_a]);
1188 Inkscape::SnappedPoint sn = m.constrainedSnapSkew(Inkscape::SnapPreferences::SNAPPOINT_NODE, _snap_points, _point, constraint, s, _origin, Geom::Dim2(dim_b));
1190 if (sn.getSnapped()) {
1191 // We snapped something, so change the skew to reflect it
1192 Geom::Coord const sd = sn.getSnapped() ? sn.getTransformation()[0] : NR_HUGE;
1193 _desktop->snapindicator->set_new_snaptarget(sn);
1194 skew[dim_a] = sd;
1195 } else {
1196 _desktop->snapindicator->remove_snaptarget();
1197 }
1198 }
1200 // Update the handle position
1201 pt[dim_b] = initial_delta[dim_a] * skew[dim_a] + _point[dim_b];
1202 pt[dim_a] = initial_delta[dim_a] * scale[dim_a] + _origin[dim_a];
1204 // Calculate the relative affine
1205 _relative_affine = Geom::identity();
1206 _relative_affine[2*dim_a + dim_a] = (pt[dim_a] - _origin[dim_a]) / initial_delta[dim_a];
1207 _relative_affine[2*dim_a + (dim_b)] = (pt[dim_b] - _point[dim_b]) / initial_delta[dim_a];
1208 _relative_affine[2*(dim_b) + (dim_a)] = 0;
1209 _relative_affine[2*(dim_b) + (dim_b)] = 1;
1211 for (int i = 0; i < 2; i++) {
1212 if (fabs(_relative_affine[3*i]) < 1e-15) {
1213 _relative_affine[3*i] = 1e-15;
1214 }
1215 }
1217 // Update the status text
1218 double degrees = mod360symm(Geom::rad_to_deg(radians));
1219 _message_context.setF(Inkscape::IMMEDIATE_MESSAGE,
1220 // TRANSLATORS: don't modify the first ";"
1221 // (it will NOT be displayed as ";" - only the second one will be)
1222 _("<b>Skew</b>: %0.2f°; with <b>Ctrl</b> to snap angle"),
1223 degrees);
1225 return TRUE;
1226 }
1228 gboolean Inkscape::SelTrans::rotateRequest(Geom::Point &pt, guint state)
1229 {
1230 /* When rotating (or skewing):
1231 * 1) the stroke width will not change. This makes life much easier because we don't have to
1232 * account for that (like for scaling or stretching). As a consequence, all points will
1233 * have the same origin for the transformation and for the snapping.
1234 * 2) When holding shift, the transformation will be relative to the point opposite of
1235 * the handle; otherwise it will be relative to the center as set for the selection
1236 */
1238 Inkscape::Preferences *prefs = Inkscape::Preferences::get();
1239 int snaps = prefs->getInt("/options/rotationsnapsperpi/value", 12);
1241 // rotate affine in rotate
1242 Geom::Point const d1 = _point - _origin;
1243 Geom::Point const d2 = pt - _origin;
1245 Geom::Coord const h1 = Geom::L2(d1); // initial radius
1246 if (h1 < 1e-15) return FALSE;
1247 Geom::Point q1 = d1 / h1; // normalized initial vector to handle
1248 Geom::Coord const h2 = Geom::L2(d2); // new radius
1249 if (fabs(h2) < 1e-15) return FALSE;
1250 Geom::Point q2 = d2 / h2; // normalized new vector to handle
1252 double radians;
1253 if (state & GDK_CONTROL_MASK) {
1254 // Snap to defined angle increments
1255 double cos_t = Geom::dot(q1, q2);
1256 double sin_t = Geom::dot(Geom::rot90(q1), q2);
1257 radians = atan2(sin_t, cos_t);
1258 if (snaps) {
1259 radians = ( M_PI / snaps ) * floor( radians * snaps / M_PI + .5 );
1260 }
1261 q1 = Geom::Point(1, 0);
1262 q2 = Geom::Point(cos(radians), sin(radians));
1263 } else {
1264 radians = atan2(Geom::dot(Geom::rot90(d1), d2),
1265 Geom::dot(d1, d2));
1266 }
1268 Geom::Rotate const r1(q1);
1269 Geom::Rotate const r2(q2);
1271 // Calculate the relative affine
1272 _relative_affine = r2 * r1.inverse();
1274 // Update the handle position
1275 pt = _point * Geom::Translate(-_origin) * _relative_affine * Geom::Translate(_origin);
1277 // Update the status text
1278 double degrees = mod360symm(Geom::rad_to_deg(radians));
1279 _message_context.setF(Inkscape::IMMEDIATE_MESSAGE,
1280 // TRANSLATORS: don't modify the first ";"
1281 // (it will NOT be displayed as ";" - only the second one will be)
1282 _("<b>Rotate</b>: %0.2f°; with <b>Ctrl</b> to snap angle"), degrees);
1284 return TRUE;
1285 }
1287 gboolean Inkscape::SelTrans::centerRequest(Geom::Point &pt, guint state)
1288 {
1289 SnapManager &m = _desktop->namedview->snap_manager;
1290 m.setup(_desktop);
1291 m.freeSnapReturnByRef(SnapPreferences::SNAPPOINT_NODE, pt);
1293 if (state & GDK_CONTROL_MASK) {
1294 if ( fabs(_point[Geom::X] - pt[Geom::X]) > fabs(_point[Geom::Y] - pt[Geom::Y]) ) {
1295 pt[Geom::Y] = _point[Geom::Y];
1296 } else {
1297 pt[Geom::X] = _point[Geom::X];
1298 }
1299 }
1301 if ( !(state & GDK_SHIFT_MASK) && _bbox ) {
1302 // screen pixels to snap center to bbox
1303 #define SNAP_DIST 5
1304 // FIXME: take from prefs
1305 double snap_dist = SNAP_DIST / _desktop->current_zoom();
1307 for (int i = 0; i < 2; i++) {
1308 if (fabs(pt[i] - _bbox->min()[i]) < snap_dist) {
1309 pt[i] = _bbox->min()[i];
1310 }
1311 if (fabs(pt[i] - _bbox->midpoint()[i]) < snap_dist) {
1312 pt[i] = _bbox->midpoint()[i];
1313 }
1314 if (fabs(pt[i] - _bbox->max()[i]) < snap_dist) {
1315 pt[i] = _bbox->max()[i];
1316 }
1317 }
1318 }
1320 // status text
1321 GString *xs = SP_PX_TO_METRIC_STRING(pt[Geom::X], _desktop->namedview->getDefaultMetric());
1322 GString *ys = SP_PX_TO_METRIC_STRING(pt[Geom::Y], _desktop->namedview->getDefaultMetric());
1323 _message_context.setF(Inkscape::NORMAL_MESSAGE, _("Move <b>center</b> to %s, %s"), xs->str, ys->str);
1324 g_string_free(xs, FALSE);
1325 g_string_free(ys, FALSE);
1327 return TRUE;
1328 }
1330 /*
1331 * handlers for handle movement
1332 *
1333 */
1335 void sp_sel_trans_stretch(Inkscape::SelTrans *seltrans, SPSelTransHandle const &handle, Geom::Point &pt, guint state)
1336 {
1337 seltrans->stretch(handle, pt, state);
1338 }
1340 void sp_sel_trans_scale(Inkscape::SelTrans *seltrans, SPSelTransHandle const &, Geom::Point &pt, guint state)
1341 {
1342 seltrans->scale(pt, state);
1343 }
1345 void sp_sel_trans_skew(Inkscape::SelTrans *seltrans, SPSelTransHandle const &handle, Geom::Point &pt, guint state)
1346 {
1347 seltrans->skew(handle, pt, state);
1348 }
1350 void sp_sel_trans_rotate(Inkscape::SelTrans *seltrans, SPSelTransHandle const &, Geom::Point &pt, guint state)
1351 {
1352 seltrans->rotate(pt, state);
1353 }
1355 void Inkscape::SelTrans::stretch(SPSelTransHandle const &/*handle*/, Geom::Point &/*pt*/, guint /*state*/)
1356 {
1357 transform(_absolute_affine, Geom::Point(0, 0)); // we have already accounted for origin, so pass 0,0
1358 }
1360 void Inkscape::SelTrans::scale(Geom::Point &/*pt*/, guint /*state*/)
1361 {
1362 transform(_absolute_affine, Geom::Point(0, 0)); // we have already accounted for origin, so pass 0,0
1363 }
1365 void Inkscape::SelTrans::skew(SPSelTransHandle const &/*handle*/, Geom::Point &/*pt*/, guint /*state*/)
1366 {
1367 transform(_relative_affine, _origin);
1368 }
1370 void Inkscape::SelTrans::rotate(Geom::Point &/*pt*/, guint /*state*/)
1371 {
1372 transform(_relative_affine, _origin);
1373 }
1375 void sp_sel_trans_center(Inkscape::SelTrans *seltrans, SPSelTransHandle const &, Geom::Point &pt, guint /*state*/)
1376 {
1377 seltrans->setCenter(pt);
1378 }
1381 void Inkscape::SelTrans::moveTo(Geom::Point const &xy, guint state)
1382 {
1383 SnapManager &m = _desktop->namedview->snap_manager;
1384 m.setup(_desktop, true, _items_const);
1386 /* The amount that we've moved by during this drag */
1387 Geom::Point dxy = xy - _point;
1389 bool const alt = (state & GDK_MOD1_MASK);
1390 bool const control = (state & GDK_CONTROL_MASK);
1391 bool const shift = (state & GDK_SHIFT_MASK);
1393 if (alt) {
1395 /* Alt pressed means keep offset: snap the moved distance to the grid.
1396 ** FIXME: this will snap to more than just the grid, nowadays.
1397 */
1399 m.freeSnapReturnByRef(SnapPreferences::SNAPPOINT_NODE, dxy);
1401 } else if (!shift) {
1403 /* We're snapping to things, possibly with a constraint to horizontal or
1404 ** vertical movement. Obtain a list of possible translations and then
1405 ** pick the smallest.
1406 */
1408 /* This will be our list of possible translations */
1409 std::list<Inkscape::SnappedPoint> s;
1411 if (control) {
1413 /* Snap to things, and also constrain to horizontal or vertical movement */
1415 for (unsigned int dim = 0; dim < 2; dim++) {
1416 // When doing a constrained translation, all points will move in the same direction, i.e.
1417 // either horizontally or vertically. Therefore we only have to specify the direction of
1418 // the constraint-line once. The constraint lines are parallel, but might not be colinear.
1419 // Therefore we will have to set the point through which the constraint-line runs
1420 // individually for each point to be snapped; this will be handled however by _snapTransformed()
1421 s.push_back(m.constrainedSnapTranslation(Inkscape::SnapPreferences::SNAPPOINT_BBOX,
1422 _bbox_points,
1423 _point,
1424 Inkscape::Snapper::ConstraintLine(component_vectors[dim]),
1425 dxy));
1427 s.push_back(m.constrainedSnapTranslation(Inkscape::SnapPreferences::SNAPPOINT_NODE,
1428 _snap_points,
1429 _point,
1430 Inkscape::Snapper::ConstraintLine(component_vectors[dim]),
1431 dxy));
1432 }
1434 } else {
1436 // Let's leave this timer code here for a while. I'll probably need it in the near future (Diederik van Lierop)
1437 /* GTimeVal starttime;
1438 GTimeVal endtime;
1439 g_get_current_time(&starttime); */
1441 /* Snap to things with no constraint */
1442 s.push_back(m.freeSnapTranslation(Inkscape::SnapPreferences::SNAPPOINT_BBOX, _bbox_points, _point, dxy));
1443 s.push_back(m.freeSnapTranslation(Inkscape::SnapPreferences::SNAPPOINT_NODE, _snap_points, _point, dxy));
1445 /*g_get_current_time(&endtime);
1446 double elapsed = ((((double)endtime.tv_sec - starttime.tv_sec) * G_USEC_PER_SEC + (endtime.tv_usec - starttime.tv_usec))) / 1000.0;
1447 std::cout << "Time spent snapping: " << elapsed << std::endl; */
1448 }
1450 /* Pick one */
1451 Inkscape::SnappedPoint best_snapped_point;
1452 for (std::list<Inkscape::SnappedPoint>::const_iterator i = s.begin(); i != s.end(); i++) {
1453 if (i->getSnapped()) {
1454 if (best_snapped_point.isOtherSnapBetter(*i, true)) {
1455 best_snapped_point = *i;
1456 dxy = i->getTransformation();
1457 }
1458 }
1459 }
1460 if (best_snapped_point.getSnapped()) {
1461 _desktop->snapindicator->set_new_snaptarget(best_snapped_point);
1462 } else {
1463 // We didn't snap, so remove any previous snap indicator
1464 _desktop->snapindicator->remove_snaptarget();
1465 if (control) {
1466 // If we didn't snap, then we should still constrain horizontally or vertically
1467 // (When we did snap, then this constraint has already been enforced by
1468 // calling constrainedSnapTranslation() above)
1469 if (fabs(dxy[Geom::X]) > fabs(dxy[Geom::Y])) {
1470 dxy[Geom::Y] = 0;
1471 } else {
1472 dxy[Geom::X] = 0;
1473 }
1474 }
1475 }
1476 }
1478 Geom::Matrix const move((Geom::Translate(dxy)));
1479 Geom::Point const norm(0, 0);
1480 transform(move, norm);
1482 // status text
1483 GString *xs = SP_PX_TO_METRIC_STRING(dxy[Geom::X], _desktop->namedview->getDefaultMetric());
1484 GString *ys = SP_PX_TO_METRIC_STRING(dxy[Geom::Y], _desktop->namedview->getDefaultMetric());
1485 _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);
1486 g_string_free(xs, TRUE);
1487 g_string_free(ys, TRUE);
1488 }
1490 // Given a location of a handle at the visual bounding box, find the corresponding location at the
1491 // geometrical bounding box
1492 Geom::Point Inkscape::SelTrans::_getGeomHandlePos(Geom::Point const &visual_handle_pos)
1493 {
1494 if ( _snap_bbox_type == SPItem::GEOMETRIC_BBOX) {
1495 // When the selector tool is using geometric bboxes, then the handle is already
1496 // located at one of the geometric bbox corners
1497 return visual_handle_pos;
1498 }
1500 if (!_geometric_bbox) {
1501 //_getGeomHandlePos() can only be used after _geometric_bbox has been defined!
1502 return visual_handle_pos;
1503 }
1505 // Using the Geom::Rect constructor below ensures that "min() < max()", which is important
1506 // because this will also hold for _bbox, and which is required for get_scale_transform_with_stroke()
1507 Geom::Rect new_bbox = Geom::Rect(_origin_for_bboxpoints, visual_handle_pos); // new visual bounding box
1508 // Please note that the new_bbox might in fact be just a single line, for example when stretching (in
1509 // which case the handle and origin will be aligned vertically or horizontally)
1510 Geom::Point normalized_handle_pos = (visual_handle_pos - new_bbox.min()) * Geom::Scale(new_bbox.dimensions()).inverse();
1512 // Calculate the absolute affine while taking into account the scaling of the stroke width
1513 Inkscape::Preferences *prefs = Inkscape::Preferences::get();
1514 bool transform_stroke = prefs->getBool("/options/transform/stroke", true);
1515 Geom::Matrix abs_affine = get_scale_transform_with_stroke (*_bbox, _strokewidth, transform_stroke,
1516 new_bbox.min()[Geom::X], new_bbox.min()[Geom::Y], new_bbox.max()[Geom::X], new_bbox.max()[Geom::Y]);
1518 // Calculate the scaled geometrical bbox
1519 Geom::Rect new_geom_bbox = Geom::Rect(_geometric_bbox->min() * abs_affine, _geometric_bbox->max() * abs_affine);
1520 // Find the location of the handle on this new geometrical bbox
1521 return normalized_handle_pos * Geom::Scale(new_geom_bbox.dimensions()) + new_geom_bbox.min(); //new position of the geometric handle
1522 }
1524 Geom::Scale Inkscape::calcScaleFactors(Geom::Point const &initial_point, Geom::Point const &new_point, Geom::Point const &origin, bool const skew)
1525 {
1526 // Work out the new scale factors for the bbox
1528 Geom::Point const initial_delta = initial_point - origin;
1529 Geom::Point const new_delta = new_point - origin;
1530 Geom::Point const offset = new_point - initial_point;
1531 Geom::Scale scale(1, 1);
1533 for ( unsigned int i = 0 ; i < 2 ; i++ ) {
1534 if ( fabs(initial_delta[i]) > 1e-6 ) {
1535 if (skew) {
1536 scale[i] = offset[1-i] / initial_delta[i];
1537 } else {
1538 scale[i] = new_delta[i] / initial_delta[i];
1539 }
1540 }
1541 }
1543 return scale;
1544 }
1546 // Only for scaling/stretching
1547 Geom::Point Inkscape::SelTrans::_calcAbsAffineDefault(Geom::Scale const default_scale)
1548 {
1549 Geom::Matrix abs_affine = Geom::Translate(-_origin) * Geom::Matrix(default_scale) * Geom::Translate(_origin);
1550 Geom::Point new_bbox_min = _approximate_bbox->min() * abs_affine;
1551 Geom::Point new_bbox_max = _approximate_bbox->max() * abs_affine;
1553 bool transform_stroke = false;
1554 gdouble strokewidth = 0;
1556 if ( _snap_bbox_type != SPItem::GEOMETRIC_BBOX) {
1557 Inkscape::Preferences *prefs = Inkscape::Preferences::get();
1558 transform_stroke = prefs->getBool("/options/transform/stroke", true);
1559 strokewidth = _strokewidth;
1560 }
1562 _absolute_affine = get_scale_transform_with_stroke (*_approximate_bbox, strokewidth, transform_stroke,
1563 new_bbox_min[Geom::X], new_bbox_min[Geom::Y], new_bbox_max[Geom::X], new_bbox_max[Geom::Y]);
1565 // return the new handle position
1566 return ( _point - _origin ) * default_scale + _origin;
1567 }
1569 // Only for scaling/stretching
1570 Geom::Point Inkscape::SelTrans::_calcAbsAffineGeom(Geom::Scale const geom_scale)
1571 {
1572 _relative_affine = Geom::Matrix(geom_scale);
1573 _absolute_affine = Geom::Translate(-_origin_for_specpoints) * _relative_affine * Geom::Translate(_origin_for_specpoints);
1575 Inkscape::Preferences *prefs = Inkscape::Preferences::get();
1576 bool const transform_stroke = prefs->getBool("/options/transform/stroke", true);
1577 Geom::Rect visual_bbox = get_visual_bbox(_geometric_bbox, _absolute_affine, _strokewidth, transform_stroke);
1579 // return the new handle position
1580 return visual_bbox.min() + visual_bbox.dimensions() * Geom::Scale(_handle_x, _handle_y);
1581 }
1583 void Inkscape::SelTrans::_keepClosestPointOnly(std::vector<Geom::Point> &points, const Geom::Point &reference)
1584 {
1585 if (points.size() < 2) return;
1587 Geom::Point closest_point = Geom::Point(NR_HUGE, NR_HUGE);
1588 Geom::Coord closest_dist = NR_HUGE;
1590 for(std::vector<Geom::Point>::const_iterator i = points.begin(); i != points.end(); i++) {
1591 Geom::Coord dist = Geom::L2(*i - reference);
1592 if (i == points.begin() || dist < closest_dist) {
1593 closest_point = *i;
1594 closest_dist = dist;
1595 }
1596 }
1598 points.clear();
1599 points.push_back(closest_point);
1600 }
1602 /*
1603 Local Variables:
1604 mode:c++
1605 c-file-style:"stroustrup"
1606 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
1607 indent-tabs-mode:nil
1608 fill-column:99
1609 End:
1610 */
1611 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :