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);
247 Inkscape::Preferences *prefs = Inkscape::Preferences::get();
249 g_return_if_fail(!_grabbed);
251 _grabbed = true;
252 _show_handles = show_handles;
253 _updateVolatileState();
254 _current_relative_affine.setIdentity();
256 _changed = false;
258 if (_empty) {
259 return;
260 }
262 for (GSList const *l = selection->itemList(); l; l = l->next) {
263 SPItem *it = (SPItem *)sp_object_ref(SP_OBJECT(l->data), NULL);
264 _items.push_back(it);
265 _items_const.push_back(it);
266 _items_affines.push_back(sp_item_i2d_affine(it));
267 _items_centers.push_back(it->getCenter()); // for content-dragging, we need to remember original centers
268 }
270 _handle_x = x;
271 _handle_y = y;
273 // The selector tool should snap the bbox, special snappoints, and path nodes
274 // (The special points are the handles, center, rotation axis, font baseline, ends of spiral, etc.)
276 // First, determine the bounding box for snapping ...
277 _bbox = selection->bounds(_snap_bbox_type);
278 _approximate_bbox = selection->bounds(SPItem::APPROXIMATE_BBOX); // Used for correctly scaling the strokewidth
279 _geometric_bbox = selection->bounds(SPItem::GEOMETRIC_BBOX);
280 _point = p;
281 if (_geometric_bbox) {
282 _point_geom = _geometric_bbox->min() + _geometric_bbox->dimensions() * Geom::Scale(x, y);
283 } else {
284 _point_geom = p;
285 }
287 // Next, get all points to consider for snapping
288 SnapManager const &m = _desktop->namedview->snap_manager;
289 Inkscape::SnapPreferences local_snapprefs = m.snapprefs;
290 local_snapprefs.setSnapToItemNode(true); // We should get at least the cusp nodes here. This might
291 // have been turned off because (for example) the user only want paths as a snap target, not nodes
292 // but as a snap source we still need some nodes though!
293 _snap_points.clear();
294 _snap_points = selection->getSnapPoints(&local_snapprefs);
295 std::vector<std::pair<Geom::Point, int> > snap_points_hull = selection->getSnapPointsConvexHull(&local_snapprefs);
296 if (_snap_points.size() > 100) {
297 /* Snapping a huge number of nodes will take way too long, so limit the number of snappable nodes
298 An average user would rarely ever try to snap such a large number of nodes anyway, because
299 (s)he could hardly discern which node would be snapping */
300 if (prefs->getBool("/options/snapclosestonly/value", false)) {
301 _keepClosestPointOnly(_snap_points, p);
302 } else {
303 _snap_points = snap_points_hull;
304 }
305 // Unfortunately, by now we will have lost the font-baseline snappoints :-(
306 }
308 // Find bbox hulling all special points, which excludes stroke width. Here we need to include the
309 // path nodes, for example because a rectangle which has been converted to a path doesn't have
310 // any other special points
311 Geom::Rect snap_points_bbox;
312 if ( snap_points_hull.empty() == false ) {
313 std::vector<std::pair<Geom::Point, int> >::iterator i = snap_points_hull.begin();
314 snap_points_bbox = Geom::Rect((*i).first, (*i).first);
315 i++;
316 while (i != snap_points_hull.end()) {
317 snap_points_bbox.expandTo((*i).first);
318 i++;
319 }
320 }
322 _bbox_points.clear();
323 if (_bbox) {
324 if (m.snapprefs.getSnapModeBBox()) {
325 getBBoxPoints(_bbox, &_bbox_points, false, true, m.snapprefs.getSnapBBoxEdgeMidpoints(), m.snapprefs.getSnapBBoxMidpoints());
326 }
327 // There are two separate "opposites" (i.e. opposite w.r.t. the handle being dragged):
328 // - one for snapping the boundingbox, which can be either visual or geometric
329 // - one for snapping the special points
330 // The "opposite" in case of a geometric boundingbox always coincides with the "opposite" for the special points
331 // These distinct "opposites" are needed in the snapmanager to avoid bugs such as #sf1540195 (in which
332 // a box is caught between two guides)
333 _opposite_for_bboxpoints = _bbox->min() + _bbox->dimensions() * Geom::Scale(1-x, 1-y);
334 _opposite_for_specpoints = snap_points_bbox.min() + snap_points_bbox.dimensions() * Geom::Scale(1-x, 1-y);
335 _opposite = _opposite_for_bboxpoints;
336 }
338 // When snapping the node closest to the mouse pointer is absolutely preferred over the closest snap
339 // (i.e. when weight == 1), then we will not even try to snap to other points and discard those other
340 // points immediately.
342 if (prefs->getBool("/options/snapclosestonly/value", false)) {
343 if (m.snapprefs.getSnapModeNode()) {
344 _keepClosestPointOnly(_snap_points, p);
345 } else {
346 _snap_points.clear(); // don't keep any point
347 }
349 if (m.snapprefs.getSnapModeBBox()) {
350 _keepClosestPointOnly(_bbox_points, p);
351 } else {
352 _bbox_points.clear(); // don't keep any point
353 }
355 g_assert(_bbox_points.size() < 2 && _snap_points.size() < 2);
356 if (_snap_points.size() == 1 && _bbox_points.size() == 1) { //both vectors can only have either one or zero elements
357 // So we have exactly one bbox corner and one node left; now find out which is closest and delete the other one
358 if (Geom::L2((_snap_points.at(0)).first - p) < Geom::L2((_bbox_points.at(0)).first - p)) {
359 _bbox_points.clear();
360 } else {
361 _snap_points.clear();
362 }
363 }
365 // Optionally, show the snap source
366 if (!(_state == STATE_ROTATE && x != 0.5 && y != 0.5)) { // but not when we're draging a rotation handle, because that won't snap
367 // Now either _bbox_points or _snap_points has a single element, the other one has zero..... or both have zero elements
368 g_assert((_bbox_points.size() + _snap_points.size()) < 2);
369 if (m.snapprefs.getSnapEnabledGlobally()) {
370 if (_bbox_points.size() == 1) {
371 _desktop->snapindicator->set_new_snapsource(_bbox_points.at(0));
372 } else if (_snap_points.size() == 1){
373 _desktop->snapindicator->set_new_snapsource(_snap_points.at(0));
374 }
375 }
376 }
377 }
379 //sp_event_context_snap_window_open(_desktop->event_context);
381 if ((x != -1) && (y != -1)) {
382 sp_canvas_item_show(_norm);
383 sp_canvas_item_show(_grip);
384 }
386 if (_show == SHOW_OUTLINE) {
387 for (int i = 0; i < 4; i++)
388 sp_canvas_item_show(_l[i]);
389 }
391 _updateHandles();
392 g_return_if_fail(_stamp_cache == NULL);
393 }
395 void Inkscape::SelTrans::transform(Geom::Matrix const &rel_affine, Geom::Point const &norm)
396 {
397 g_return_if_fail(_grabbed);
398 g_return_if_fail(!_empty);
400 Geom::Matrix const affine( Geom::Translate(-norm) * rel_affine * Geom::Translate(norm) );
402 if (_show == SHOW_CONTENT) {
403 // update the content
404 for (unsigned i = 0; i < _items.size(); i++) {
405 SPItem &item = *_items[i];
406 Geom::Matrix const &prev_transform = _items_affines[i];
407 sp_item_set_i2d_affine(&item, prev_transform * affine);
408 }
409 } else {
410 if (_bbox) {
411 Geom::Point p[4];
412 /* update the outline */
413 for (unsigned i = 0 ; i < 4 ; i++) {
414 p[i] = _bbox->corner(i) * affine;
415 }
416 for (unsigned i = 0 ; i < 4 ; i++) {
417 sp_ctrlline_set_coords(SP_CTRLLINE(_l[i]), p[i], p[(i+1)%4]);
418 }
419 }
420 }
422 _current_relative_affine = affine;
423 _changed = true;
424 _updateHandles();
425 }
427 void Inkscape::SelTrans::ungrab()
428 {
429 g_return_if_fail(_grabbed);
430 _grabbed = false;
431 _show_handles = true;
433 //sp_event_context_snap_window_closed(_desktop->event_context);
435 _desktop->snapindicator->remove_snapsource();
437 Inkscape::Selection *selection = sp_desktop_selection(_desktop);
438 _updateVolatileState();
440 for (unsigned i = 0; i < _items.size(); i++) {
441 sp_object_unref(SP_OBJECT(_items[i]), NULL);
442 }
444 sp_canvas_item_hide(_norm);
445 sp_canvas_item_hide(_grip);
447 if (_show == SHOW_OUTLINE) {
448 for (int i = 0; i < 4; i++)
449 sp_canvas_item_hide(_l[i]);
450 }
452 if (_stamp_cache) {
453 g_slist_free(_stamp_cache);
454 _stamp_cache = NULL;
455 }
457 _message_context.clear();
459 if (!_empty && _changed) {
460 sp_selection_apply_affine(selection, _current_relative_affine, (_show == SHOW_OUTLINE)? true : false);
461 if (_center) {
462 *_center *= _current_relative_affine;
463 _center_is_set = true;
464 }
466 // If dragging showed content live, sp_selection_apply_affine cannot change the centers
467 // appropriately - it does not know the original positions of the centers (all objects already have
468 // the new bboxes). So we need to reset the centers from our saved array.
469 if (_show != SHOW_OUTLINE && !_current_relative_affine.isTranslation()) {
470 for (unsigned i = 0; i < _items_centers.size(); i++) {
471 SPItem *currentItem = _items[i];
472 if (currentItem->isCenterSet()) { // only if it's already set
473 currentItem->setCenter (_items_centers[i] * _current_relative_affine);
474 SP_OBJECT(currentItem)->updateRepr();
475 }
476 }
477 }
479 _items.clear();
480 _items_const.clear();
481 _items_affines.clear();
482 _items_centers.clear();
484 if (_current_relative_affine.isTranslation()) {
485 sp_document_done(sp_desktop_document(_desktop), SP_VERB_CONTEXT_SELECT,
486 _("Move"));
487 } else if (_current_relative_affine.isScale()) {
488 sp_document_done(sp_desktop_document(_desktop), SP_VERB_CONTEXT_SELECT,
489 _("Scale"));
490 } else if (_current_relative_affine.isRotation()) {
491 sp_document_done(sp_desktop_document(_desktop), SP_VERB_CONTEXT_SELECT,
492 _("Rotate"));
493 } else {
494 sp_document_done(sp_desktop_document(_desktop), SP_VERB_CONTEXT_SELECT,
495 _("Skew"));
496 }
498 } else {
500 if (_center_is_set) {
501 // we were dragging center; update reprs and commit undoable action
502 for (GSList const *l = _desktop->selection->itemList(); l; l = l->next) {
503 SPItem *it = (SPItem*)SP_OBJECT(l->data);
504 SP_OBJECT(it)->updateRepr();
505 }
506 sp_document_done (sp_desktop_document(_desktop), SP_VERB_CONTEXT_SELECT,
507 _("Set center"));
508 }
510 _items.clear();
511 _items_const.clear();
512 _items_affines.clear();
513 _items_centers.clear();
514 _updateHandles();
515 }
516 }
518 /* fixme: This is really bad, as we compare positions for each stamp (Lauris) */
519 /* fixme: IMHO the best way to keep sort cache would be to implement timestamping at last */
521 void Inkscape::SelTrans::stamp()
522 {
523 Inkscape::Selection *selection = sp_desktop_selection(_desktop);
525 bool fixup = !_grabbed;
526 if ( fixup && _stamp_cache ) {
527 // TODO - give a proper fix. Simple temproary work-around for the grab() issue
528 g_slist_free(_stamp_cache);
529 _stamp_cache = NULL;
530 }
532 /* stamping mode */
533 if (!_empty) {
534 GSList *l;
535 if (_stamp_cache) {
536 l = _stamp_cache;
537 } else {
538 /* Build cache */
539 l = g_slist_copy((GSList *) selection->itemList());
540 l = g_slist_sort(l, (GCompareFunc) sp_object_compare_position);
541 _stamp_cache = l;
542 }
544 while (l) {
545 SPItem *original_item = SP_ITEM(l->data);
546 Inkscape::XML::Node *original_repr = SP_OBJECT_REPR(original_item);
548 // remember the position of the item
549 gint pos = original_repr->position();
550 // remember parent
551 Inkscape::XML::Node *parent = sp_repr_parent(original_repr);
553 Inkscape::XML::Node *copy_repr = original_repr->duplicate(parent->document());
555 // add the new repr to the parent
556 parent->appendChild(copy_repr);
557 // move to the saved position
558 copy_repr->setPosition(pos > 0 ? pos : 0);
560 SPItem *copy_item = (SPItem *) sp_desktop_document(_desktop)->getObjectByRepr(copy_repr);
562 Geom::Matrix const *new_affine;
563 if (_show == SHOW_OUTLINE) {
564 Geom::Matrix const i2d(sp_item_i2d_affine(original_item));
565 Geom::Matrix const i2dnew( i2d * _current_relative_affine );
566 sp_item_set_i2d_affine(copy_item, i2dnew);
567 new_affine = ©_item->transform;
568 } else {
569 new_affine = &original_item->transform;
570 }
572 sp_item_write_transform(copy_item, copy_repr, *new_affine);
574 if ( copy_item->isCenterSet() && _center ) {
575 copy_item->setCenter(*_center * _current_relative_affine);
576 }
578 Inkscape::GC::release(copy_repr);
579 l = l->next;
580 }
581 sp_document_done(sp_desktop_document(_desktop), SP_VERB_CONTEXT_SELECT,
582 _("Stamp"));
583 }
585 if ( fixup && _stamp_cache ) {
586 // TODO - give a proper fix. Simple temproary work-around for the grab() issue
587 g_slist_free(_stamp_cache);
588 _stamp_cache = NULL;
589 }
590 }
592 void Inkscape::SelTrans::_updateHandles()
593 {
594 if ( !_show_handles || _empty )
595 {
596 sp_remove_handles(_shandle, 8);
597 sp_remove_handles(_rhandle, 8);
598 sp_remove_handles(&_chandle, 1);
599 return;
600 }
602 // center handle
603 if ( _chandle == NULL ) {
604 _chandle = sp_knot_new(_desktop, _("<b>Center</b> of rotation and skewing: drag to reposition; scaling with Shift also uses this center"));
606 _chandle->setShape (SP_CTRL_SHAPE_BITMAP);
607 _chandle->setSize (13);
608 _chandle->setAnchor (handle_center.anchor);
609 _chandle->setMode (SP_CTRL_MODE_XOR);
610 _chandle->setFill(0x00000000, 0x00000000, 0x00000000);
611 _chandle->setStroke(0x000000ff, 0xff0000b0, 0xff0000b0);
612 _chandle->setPixbuf(handles[handle_center.control]);
613 sp_knot_update_ctrl(_chandle);
615 g_signal_connect(G_OBJECT(_chandle), "request",
616 G_CALLBACK(sp_sel_trans_handle_request), (gpointer) &handle_center);
617 g_signal_connect(G_OBJECT(_chandle), "moved",
618 G_CALLBACK(sp_sel_trans_handle_new_event), (gpointer) &handle_center);
619 g_signal_connect(G_OBJECT(_chandle), "grabbed",
620 G_CALLBACK(sp_sel_trans_handle_grab), (gpointer) &handle_center);
621 g_signal_connect(G_OBJECT(_chandle), "ungrabbed",
622 G_CALLBACK(sp_sel_trans_handle_ungrab), (gpointer) &handle_center);
623 g_signal_connect(G_OBJECT(_chandle), "clicked",
624 G_CALLBACK(sp_sel_trans_handle_click), (gpointer) &handle_center);
625 }
627 sp_remove_handles(&_chandle, 1);
628 if ( _state == STATE_SCALE ) {
629 sp_remove_handles(_rhandle, 8);
630 _showHandles(_shandle, handles_scale, 8,
631 _("<b>Squeeze or stretch</b> selection; with <b>Ctrl</b> to scale uniformly; with <b>Shift</b> to scale around rotation center"),
632 _("<b>Scale</b> selection; with <b>Ctrl</b> to scale uniformly; with <b>Shift</b> to scale around rotation center"));
633 } else {
634 sp_remove_handles(_shandle, 8);
635 _showHandles(_rhandle, handles_rotate, 8,
636 _("<b>Skew</b> selection; with <b>Ctrl</b> to snap angle; with <b>Shift</b> to skew around the opposite side"),
637 _("<b>Rotate</b> selection; with <b>Ctrl</b> to snap angle; with <b>Shift</b> to rotate around the opposite corner"));
638 }
640 if (!_center_is_set) {
641 _center = _desktop->selection->center();
642 _center_is_set = true;
643 }
645 if ( _state == STATE_SCALE || !_center ) {
646 sp_knot_hide(_chandle);
647 } else {
648 sp_knot_show(_chandle);
649 sp_knot_moveto(_chandle, *_center);
650 }
651 }
653 void Inkscape::SelTrans::_updateVolatileState()
654 {
655 Inkscape::Selection *selection = sp_desktop_selection(_desktop);
656 _empty = selection->isEmpty();
658 if (_empty) {
659 return;
660 }
662 //Update the bboxes
663 _bbox = selection->bounds(_snap_bbox_type);
664 _approximate_bbox = selection->bounds(SPItem::APPROXIMATE_BBOX);
666 if (!_bbox) {
667 _empty = true;
668 return;
669 }
671 _strokewidth = stroke_average_width (selection->itemList());
672 }
674 static void sp_remove_handles(SPKnot *knot[], gint num)
675 {
676 for (int i = 0; i < num; i++) {
677 if (knot[i] != NULL) {
678 sp_knot_hide(knot[i]);
679 }
680 }
681 }
683 void Inkscape::SelTrans::_showHandles(SPKnot *knot[], SPSelTransHandle const handle[], gint num,
684 gchar const *even_tip, gchar const *odd_tip)
685 {
686 g_return_if_fail( !_empty );
688 for (int i = 0; i < num; i++) {
689 if (knot[i] == NULL) {
690 knot[i] = sp_knot_new(_desktop, i % 2 ? even_tip : odd_tip);
692 knot[i]->setShape (SP_CTRL_SHAPE_BITMAP);
693 knot[i]->setSize (13);
694 knot[i]->setAnchor (handle[i].anchor);
695 knot[i]->setMode (SP_CTRL_MODE_XOR);
696 knot[i]->setFill(0x000000ff, 0x00ff6600, 0x00ff6600); // inversion, green, green
697 knot[i]->setStroke(0x000000ff, 0x000000ff, 0x000000ff); // inversion
698 knot[i]->setPixbuf(handles[handle[i].control]);
699 sp_knot_update_ctrl(knot[i]);
701 g_signal_connect(G_OBJECT(knot[i]), "request",
702 G_CALLBACK(sp_sel_trans_handle_request), (gpointer) &handle[i]);
703 g_signal_connect(G_OBJECT(knot[i]), "moved",
704 G_CALLBACK(sp_sel_trans_handle_new_event), (gpointer) &handle[i]);
705 g_signal_connect(G_OBJECT(knot[i]), "grabbed",
706 G_CALLBACK(sp_sel_trans_handle_grab), (gpointer) &handle[i]);
707 g_signal_connect(G_OBJECT(knot[i]), "ungrabbed",
708 G_CALLBACK(sp_sel_trans_handle_ungrab), (gpointer) &handle[i]);
709 g_signal_connect(G_OBJECT(knot[i]), "event", G_CALLBACK(sp_seltrans_handle_event), (gpointer) &handle[i]);
710 }
711 sp_knot_show(knot[i]);
713 Geom::Point const handle_pt(handle[i].x, handle[i].y);
714 // shouldn't have nullary bbox, but knots
715 g_assert(_bbox);
716 Geom::Point p( _bbox->min()
717 + ( _bbox->dimensions()
718 * Geom::Scale(handle_pt) ) );
720 sp_knot_moveto(knot[i], p);
721 }
722 }
724 static void sp_sel_trans_handle_grab(SPKnot *knot, guint state, gpointer data)
725 {
726 SP_SELECT_CONTEXT(knot->desktop->event_context)->_seltrans->handleGrab(
727 knot, state, *(SPSelTransHandle const *) data
728 );
729 }
731 static void sp_sel_trans_handle_ungrab(SPKnot *knot, guint /*state*/, gpointer /*data*/)
732 {
733 SP_SELECT_CONTEXT(knot->desktop->event_context)->_seltrans->ungrab();
734 }
736 static void sp_sel_trans_handle_new_event(SPKnot *knot, Geom::Point *position, guint state, gpointer data)
737 {
738 SP_SELECT_CONTEXT(knot->desktop->event_context)->_seltrans->handleNewEvent(
739 knot, position, state, *(SPSelTransHandle const *) data
740 );
741 }
743 static gboolean sp_sel_trans_handle_request(SPKnot *knot, Geom::Point *position, guint state, gboolean *data)
744 {
745 return SP_SELECT_CONTEXT(knot->desktop->event_context)->_seltrans->handleRequest(
746 knot, position, state, *(SPSelTransHandle const *) data
747 );
748 }
750 static void sp_sel_trans_handle_click(SPKnot *knot, guint state, gpointer data)
751 {
752 SP_SELECT_CONTEXT(knot->desktop->event_context)->_seltrans->handleClick(
753 knot, state, *(SPSelTransHandle const *) data
754 );
755 }
757 void Inkscape::SelTrans::handleClick(SPKnot */*knot*/, guint state, SPSelTransHandle const &handle)
758 {
759 switch (handle.anchor) {
760 case GTK_ANCHOR_CENTER:
761 if (state & GDK_SHIFT_MASK) {
762 // Unset the center position for all selected items
763 for (GSList const *l = _desktop->selection->itemList(); l; l = l->next) {
764 SPItem *it = (SPItem*)(SP_OBJECT(l->data));
765 it->unsetCenter();
766 SP_OBJECT(it)->updateRepr();
767 _center_is_set = false; // center has changed
768 _updateHandles();
769 }
770 sp_document_done (sp_desktop_document(_desktop), SP_VERB_CONTEXT_SELECT,
771 _("Reset center"));
772 }
773 break;
774 default:
775 break;
776 }
777 }
779 void Inkscape::SelTrans::handleGrab(SPKnot *knot, guint /*state*/, SPSelTransHandle const &handle)
780 {
781 switch (handle.anchor) {
782 case GTK_ANCHOR_CENTER:
783 g_object_set(G_OBJECT(_grip),
784 "shape", SP_CTRL_SHAPE_BITMAP,
785 "size", 13.0,
786 NULL);
787 sp_canvas_item_show(_grip);
788 break;
789 default:
790 g_object_set(G_OBJECT(_grip),
791 "shape", SP_CTRL_SHAPE_CROSS,
792 "size", 7.0,
793 NULL);
794 sp_canvas_item_show(_norm);
795 sp_canvas_item_show(_grip);
797 break;
798 }
800 grab(sp_knot_position(knot), handle.x, handle.y, FALSE);
801 }
804 void Inkscape::SelTrans::handleNewEvent(SPKnot *knot, Geom::Point *position, guint state, SPSelTransHandle const &handle)
805 {
806 if (!SP_KNOT_IS_GRABBED(knot)) {
807 return;
808 }
810 // in case items have been unhooked from the document, don't
811 // try to continue processing events for them.
812 for (unsigned int i = 0; i < _items.size(); i++) {
813 if (!SP_OBJECT_DOCUMENT(SP_OBJECT(_items[i])) ) {
814 return;
815 }
816 }
818 handle.action(this, handle, *position, state);
819 }
822 gboolean Inkscape::SelTrans::handleRequest(SPKnot *knot, Geom::Point *position, guint state, SPSelTransHandle const &handle)
823 {
824 if (!SP_KNOT_IS_GRABBED(knot)) {
825 return TRUE;
826 }
828 knot->desktop->setPosition(*position);
830 // When holding shift while rotating or skewing, the transformation will be
831 // relative to the point opposite of the handle; otherwise it will be relative
832 // to the center as set for the selection
833 if ((!(state & GDK_SHIFT_MASK) == !(_state == STATE_ROTATE)) && (&handle != &handle_center)) {
834 _origin = _opposite;
835 _origin_for_bboxpoints = _opposite_for_bboxpoints;
836 _origin_for_specpoints = _opposite_for_specpoints;
837 } else if (_center) {
838 _origin = *_center;
839 _origin_for_bboxpoints = *_center;
840 _origin_for_specpoints = *_center;
841 } else {
842 // FIXME
843 return TRUE;
844 }
845 if (handle.request(this, handle, *position, state)) {
846 sp_knot_set_position(knot, *position, state);
847 SP_CTRL(_grip)->moveto(*position);
848 SP_CTRL(_norm)->moveto(_origin);
849 }
851 return TRUE;
852 }
855 void Inkscape::SelTrans::_selChanged(Inkscape::Selection */*selection*/)
856 {
857 if (!_grabbed) {
858 Inkscape::Preferences *prefs = Inkscape::Preferences::get();
859 // reread in case it changed on the fly:
860 int prefs_bbox = prefs->getBool("/tools/bounding_box");
861 _snap_bbox_type = !prefs_bbox ?
862 SPItem::APPROXIMATE_BBOX : SPItem::GEOMETRIC_BBOX;
863 //SPItem::APPROXIMATE_BBOX will be replaced by SPItem::VISUAL_BBOX, as soon as the latter is implemented properly
865 _updateVolatileState();
866 _current_relative_affine.setIdentity();
867 _center_is_set = false; // center(s) may have changed
868 _updateHandles();
869 }
870 }
872 void Inkscape::SelTrans::_selModified(Inkscape::Selection */*selection*/, guint /*flags*/)
873 {
874 if (!_grabbed) {
875 _updateVolatileState();
876 _current_relative_affine.setIdentity();
878 // reset internal flag
879 _changed = false;
881 _center_is_set = false; // center(s) may have changed
883 _updateHandles();
884 }
885 }
887 /*
888 * handlers for handle move-request
889 */
891 /** Returns -1 or 1 according to the sign of x. Returns 1 for 0 and NaN. */
892 static double sign(double const x)
893 {
894 return ( x < 0
895 ? -1
896 : 1 );
897 }
899 gboolean sp_sel_trans_scale_request(Inkscape::SelTrans *seltrans,
900 SPSelTransHandle const &, Geom::Point &pt, guint state)
901 {
902 return seltrans->scaleRequest(pt, state);
903 }
905 gboolean sp_sel_trans_stretch_request(Inkscape::SelTrans *seltrans,
906 SPSelTransHandle const &handle, Geom::Point &pt, guint state)
907 {
908 return seltrans->stretchRequest(handle, pt, state);
909 }
911 gboolean sp_sel_trans_skew_request(Inkscape::SelTrans *seltrans,
912 SPSelTransHandle const &handle, Geom::Point &pt, guint state)
913 {
914 return seltrans->skewRequest(handle, pt, state);
915 }
917 gboolean sp_sel_trans_rotate_request(Inkscape::SelTrans *seltrans,
918 SPSelTransHandle const &, Geom::Point &pt, guint state)
919 {
920 return seltrans->rotateRequest(pt, state);
921 }
923 gboolean sp_sel_trans_center_request(Inkscape::SelTrans *seltrans,
924 SPSelTransHandle const &, Geom::Point &pt, guint state)
925 {
926 return seltrans->centerRequest(pt, state);
927 }
929 gboolean Inkscape::SelTrans::scaleRequest(Geom::Point &pt, guint state)
930 {
932 // Calculate the scale factors, which can be either visual or geometric
933 // depending on which type of bbox is currently being used (see preferences -> selector tool)
934 Geom::Scale default_scale = calcScaleFactors(_point, pt, _origin);
936 // Find the scale factors for the geometric bbox
937 Geom::Point pt_geom = _getGeomHandlePos(pt);
938 Geom::Scale geom_scale = calcScaleFactors(_point_geom, pt_geom, _origin_for_specpoints);
940 _absolute_affine = Geom::identity(); //Initialize the scaler
942 if (state & GDK_MOD1_MASK) { // scale by an integer multiplier/divider
943 // We're scaling either the visual or the geometric bbox here (see the comment above)
944 for ( unsigned int i = 0 ; i < 2 ; i++ ) {
945 if (fabs(default_scale[i]) > 1) {
946 default_scale[i] = round(default_scale[i]);
947 } else if (default_scale[i] != 0) {
948 default_scale[i] = 1/round(1/(MIN(default_scale[i], 10)));
949 }
950 }
951 // Update the knot position
952 pt = _calcAbsAffineDefault(default_scale);
953 // When scaling by an integer, snapping is not needed
954 } else {
955 // In all other cases we should try to snap now
956 SnapManager &m = _desktop->namedview->snap_manager;
957 m.setup(_desktop, false, _items_const);
959 Inkscape::SnappedPoint bb, sn;
960 Geom::Coord bd(NR_HUGE);
961 Geom::Coord sd(NR_HUGE);
963 if ((state & GDK_CONTROL_MASK) || _desktop->isToolboxButtonActive ("lock")) {
964 // Scale is locked to a 1:1 aspect ratio, so that s[X] must be made to equal s[Y].
965 //
966 // The aspect-ratio must be locked before snapping
967 if (fabs(default_scale[Geom::X]) > fabs(default_scale[Geom::Y])) {
968 default_scale[Geom::X] = fabs(default_scale[Geom::Y]) * sign(default_scale[Geom::X]);
969 geom_scale[Geom::X] = fabs(geom_scale[Geom::Y]) * sign(geom_scale[Geom::X]);
970 } else {
971 default_scale[Geom::Y] = fabs(default_scale[Geom::X]) * sign(default_scale[Geom::Y]);
972 geom_scale[Geom::Y] = fabs(geom_scale[Geom::X]) * sign(geom_scale[Geom::Y]);
973 }
975 // Snap along a suitable constraint vector from the origin.
976 bb = m.constrainedSnapScale(SnapPreferences::SNAPPOINT_BBOX, _bbox_points, _point, default_scale, _origin_for_bboxpoints);
977 sn = m.constrainedSnapScale(SnapPreferences::SNAPPOINT_NODE, _snap_points, _point, geom_scale, _origin_for_specpoints);
979 /* Choose the smaller difference in scale. Since s[X] == s[Y] we can
980 ** just compare difference in s[X].
981 */
982 bd = bb.getSnapped() ? fabs(bb.getTransformation()[Geom::X] - default_scale[Geom::X]) : NR_HUGE;
983 sd = sn.getSnapped() ? fabs(sn.getTransformation()[Geom::X] - geom_scale[Geom::X]) : NR_HUGE;
984 } else {
985 /* Scale aspect ratio is unlocked */
986 bb = m.freeSnapScale(SnapPreferences::SNAPPOINT_BBOX, _bbox_points, _point, default_scale, _origin_for_bboxpoints);
987 sn = m.freeSnapScale(SnapPreferences::SNAPPOINT_NODE, _snap_points, _point, geom_scale, _origin_for_specpoints);
989 /* Pick the snap that puts us closest to the original scale */
990 bd = bb.getSnapped() ? fabs(Geom::L2(bb.getTransformation()) - Geom::L2(Geom::Point(default_scale[Geom::X], default_scale[Geom::Y]))) : NR_HUGE;
991 sd = sn.getSnapped() ? fabs(Geom::L2(sn.getTransformation()) - Geom::L2(Geom::Point(geom_scale[Geom::X], geom_scale[Geom::Y]))) : NR_HUGE;
992 }
994 if (!(bb.getSnapped() || sn.getSnapped())) {
995 // We didn't snap at all! Don't update the handle position, just calculate the new transformation
996 _calcAbsAffineDefault(default_scale);
997 _desktop->snapindicator->remove_snaptarget();
998 } else if (bd < sd) {
999 // We snapped the bbox (which is either visual or geometric)
1000 _desktop->snapindicator->set_new_snaptarget(bb);
1001 default_scale = Geom::Scale(bb.getTransformation());
1002 // Calculate the new transformation and update the handle position
1003 pt = _calcAbsAffineDefault(default_scale);
1004 } else {
1005 _desktop->snapindicator->set_new_snaptarget(sn);
1006 // We snapped the special points (e.g. nodes), which are not at the visual bbox
1007 // The handle location however (pt) might however be at the visual bbox, so we
1008 // will have to calculate pt taking the stroke width into account
1009 geom_scale = Geom::Scale(sn.getTransformation());
1010 pt = _calcAbsAffineGeom(geom_scale);
1011 }
1012 }
1014 /* Status text */
1015 _message_context.setF(Inkscape::IMMEDIATE_MESSAGE,
1016 _("<b>Scale</b>: %0.2f%% x %0.2f%%; with <b>Ctrl</b> to lock ratio"),
1017 100 * _absolute_affine[0], 100 * _absolute_affine[3]);
1019 return TRUE;
1020 }
1022 gboolean Inkscape::SelTrans::stretchRequest(SPSelTransHandle const &handle, Geom::Point &pt, guint state)
1023 {
1024 Geom::Dim2 axis, perp;
1025 switch (handle.cursor) {
1026 case GDK_TOP_SIDE:
1027 case GDK_BOTTOM_SIDE:
1028 axis = Geom::Y;
1029 perp = Geom::X;
1030 break;
1031 case GDK_LEFT_SIDE:
1032 case GDK_RIGHT_SIDE:
1033 axis = Geom::X;
1034 perp = Geom::Y;
1035 break;
1036 default:
1037 g_assert_not_reached();
1038 return TRUE;
1039 };
1041 // Calculate the scale factors, which can be either visual or geometric
1042 // depending on which type of bbox is currently being used (see preferences -> selector tool)
1043 Geom::Scale default_scale = calcScaleFactors(_point, pt, _origin);
1044 default_scale[perp] = 1;
1046 // Find the scale factors for the geometric bbox
1047 Geom::Point pt_geom = _getGeomHandlePos(pt);
1048 Geom::Scale geom_scale = calcScaleFactors(_point_geom, pt_geom, _origin_for_specpoints);
1049 geom_scale[perp] = 1;
1051 _absolute_affine = Geom::identity(); //Initialize the scaler
1053 if (state & GDK_MOD1_MASK) { // stretch by an integer multiplier/divider
1054 if (fabs(default_scale[axis]) > 1) {
1055 default_scale[axis] = round(default_scale[axis]);
1056 } else if (default_scale[axis] != 0) {
1057 default_scale[axis] = 1/round(1/(MIN(default_scale[axis], 10)));
1058 }
1059 // Calculate the new transformation and update the handle position
1060 pt = _calcAbsAffineDefault(default_scale);
1061 // When stretching by an integer, snapping is not needed
1062 } else {
1063 // In all other cases we should try to snap now
1065 SnapManager &m = _desktop->namedview->snap_manager;
1066 m.setup(_desktop, false, _items_const);
1068 Inkscape::SnappedPoint bb, sn;
1069 g_assert(bb.getSnapped() == false); // Check initialization to catch any regression
1070 Geom::Coord bd(NR_HUGE);
1071 Geom::Coord sd(NR_HUGE);
1073 bool symmetrical = state & GDK_CONTROL_MASK;
1075 bb = m.constrainedSnapStretch(SnapPreferences::SNAPPOINT_BBOX, _bbox_points, _point, Geom::Coord(default_scale[axis]), _origin_for_bboxpoints, Geom::Dim2(axis), symmetrical);
1076 sn = m.constrainedSnapStretch(SnapPreferences::SNAPPOINT_NODE, _snap_points, _point, Geom::Coord(geom_scale[axis]), _origin_for_specpoints, Geom::Dim2(axis), symmetrical);
1078 if (bb.getSnapped()) {
1079 // We snapped the bbox (which is either visual or geometric)
1080 bd = fabs(bb.getTransformation()[axis] - default_scale[axis]);
1081 default_scale[axis] = bb.getTransformation()[axis];
1082 }
1084 if (sn.getSnapped()) {
1085 sd = fabs(sn.getTransformation()[axis] - geom_scale[axis]);
1086 geom_scale[axis] = sn.getTransformation()[axis];
1087 }
1089 if (symmetrical) {
1090 // on ctrl, apply symmetrical scaling instead of stretching
1091 // Preserve aspect ratio, but never flip in the dimension not being edited (by using fabs())
1092 default_scale[perp] = fabs(default_scale[axis]);
1093 geom_scale[perp] = fabs(geom_scale[axis]);
1094 }
1096 if (!(bb.getSnapped() || sn.getSnapped())) {
1097 // We didn't snap at all! Don't update the handle position, just calculate the new transformation
1098 _calcAbsAffineDefault(default_scale);
1099 _desktop->snapindicator->remove_snaptarget();
1100 } else if (bd < sd) {
1101 _desktop->snapindicator->set_new_snaptarget(bb);
1102 // Calculate the new transformation and update the handle position
1103 pt = _calcAbsAffineDefault(default_scale);
1104 } else {
1105 _desktop->snapindicator->set_new_snaptarget(sn);
1106 // We snapped the special points (e.g. nodes), which are not at the visual bbox
1107 // The handle location however (pt) might however be at the visual bbox, so we
1108 // will have to calculate pt taking the stroke width into account
1109 pt = _calcAbsAffineGeom(geom_scale);
1110 }
1111 }
1113 // status text
1114 _message_context.setF(Inkscape::IMMEDIATE_MESSAGE,
1115 _("<b>Scale</b>: %0.2f%% x %0.2f%%; with <b>Ctrl</b> to lock ratio"),
1116 100 * _absolute_affine[0], 100 * _absolute_affine[3]);
1118 return TRUE;
1119 }
1121 gboolean Inkscape::SelTrans::skewRequest(SPSelTransHandle const &handle, Geom::Point &pt, guint state)
1122 {
1123 /* When skewing (or rotating):
1124 * 1) the stroke width will not change. This makes life much easier because we don't have to
1125 * account for that (like for scaling or stretching). As a consequence, all points will
1126 * have the same origin for the transformation and for the snapping.
1127 * 2) When holding shift, the transformation will be relative to the point opposite of
1128 * the handle; otherwise it will be relative to the center as set for the selection
1129 */
1131 Geom::Dim2 dim_a;
1132 Geom::Dim2 dim_b;
1134 switch (handle.cursor) {
1135 case GDK_SB_H_DOUBLE_ARROW:
1136 dim_a = Geom::Y;
1137 dim_b = Geom::X;
1138 break;
1139 case GDK_SB_V_DOUBLE_ARROW:
1140 dim_a = Geom::X;
1141 dim_b = Geom::Y;
1142 break;
1143 default:
1144 g_assert_not_reached();
1145 abort();
1146 break;
1147 }
1149 Geom::Point const initial_delta = _point - _origin;
1151 if (fabs(initial_delta[dim_a]) < 1e-15) {
1152 return false;
1153 }
1155 // Calculate the scale factors, which can be either visual or geometric
1156 // depending on which type of bbox is currently being used (see preferences -> selector tool)
1157 Geom::Scale scale = calcScaleFactors(_point, pt, _origin, false);
1158 Geom::Scale skew = calcScaleFactors(_point, pt, _origin, true);
1159 scale[dim_b] = 1;
1160 skew[dim_b] = 1;
1162 if (fabs(scale[dim_a]) < 1) {
1163 // Prevent shrinking of the selected object, while allowing mirroring
1164 scale[dim_a] = sign(scale[dim_a]);
1165 } else {
1166 // Allow expanding of the selected object by integer multiples
1167 scale[dim_a] = floor(scale[dim_a] + 0.5);
1168 }
1170 double radians = atan(skew[dim_a] / scale[dim_a]);
1172 if (state & GDK_CONTROL_MASK) {
1173 Inkscape::Preferences *prefs = Inkscape::Preferences::get();
1174 // Snap to defined angle increments
1175 int snaps = prefs->getInt("/options/rotationsnapsperpi/value", 12);
1176 if (snaps) {
1177 double sections = floor(radians * snaps / M_PI + .5);
1178 if (fabs(sections) >= snaps / 2) {
1179 sections = sign(sections) * (snaps / 2 - 1);
1180 }
1181 radians = (M_PI / snaps) * sections;
1182 }
1183 skew[dim_a] = tan(radians) * scale[dim_a];
1184 } else {
1185 // Snap to objects, grids, guides
1187 SnapManager &m = _desktop->namedview->snap_manager;
1188 m.setup(_desktop, false, _items_const);
1190 Inkscape::Snapper::ConstraintLine const constraint(component_vectors[dim_b]);
1191 // When skewing, we cannot snap the corners of the bounding box, see the comment in "constrainedSnapSkew" for details
1192 Geom::Point const s(skew[dim_a], scale[dim_a]);
1193 Inkscape::SnappedPoint sn = m.constrainedSnapSkew(Inkscape::SnapPreferences::SNAPPOINT_NODE, _snap_points, _point, constraint, s, _origin, Geom::Dim2(dim_b));
1195 if (sn.getSnapped()) {
1196 // We snapped something, so change the skew to reflect it
1197 Geom::Coord const sd = sn.getSnapped() ? sn.getTransformation()[0] : NR_HUGE;
1198 _desktop->snapindicator->set_new_snaptarget(sn);
1199 skew[dim_a] = sd;
1200 } else {
1201 _desktop->snapindicator->remove_snaptarget();
1202 }
1203 }
1205 // Update the handle position
1206 pt[dim_b] = initial_delta[dim_a] * skew[dim_a] + _point[dim_b];
1207 pt[dim_a] = initial_delta[dim_a] * scale[dim_a] + _origin[dim_a];
1209 // Calculate the relative affine
1210 _relative_affine = Geom::identity();
1211 _relative_affine[2*dim_a + dim_a] = (pt[dim_a] - _origin[dim_a]) / initial_delta[dim_a];
1212 _relative_affine[2*dim_a + (dim_b)] = (pt[dim_b] - _point[dim_b]) / initial_delta[dim_a];
1213 _relative_affine[2*(dim_b) + (dim_a)] = 0;
1214 _relative_affine[2*(dim_b) + (dim_b)] = 1;
1216 for (int i = 0; i < 2; i++) {
1217 if (fabs(_relative_affine[3*i]) < 1e-15) {
1218 _relative_affine[3*i] = 1e-15;
1219 }
1220 }
1222 // Update the status text
1223 double degrees = mod360symm(Geom::rad_to_deg(radians));
1224 _message_context.setF(Inkscape::IMMEDIATE_MESSAGE,
1225 // TRANSLATORS: don't modify the first ";"
1226 // (it will NOT be displayed as ";" - only the second one will be)
1227 _("<b>Skew</b>: %0.2f°; with <b>Ctrl</b> to snap angle"),
1228 degrees);
1230 return TRUE;
1231 }
1233 gboolean Inkscape::SelTrans::rotateRequest(Geom::Point &pt, guint state)
1234 {
1235 /* When rotating (or skewing):
1236 * 1) the stroke width will not change. This makes life much easier because we don't have to
1237 * account for that (like for scaling or stretching). As a consequence, all points will
1238 * have the same origin for the transformation and for the snapping.
1239 * 2) When holding shift, the transformation will be relative to the point opposite of
1240 * the handle; otherwise it will be relative to the center as set for the selection
1241 */
1243 Inkscape::Preferences *prefs = Inkscape::Preferences::get();
1244 int snaps = prefs->getInt("/options/rotationsnapsperpi/value", 12);
1246 // rotate affine in rotate
1247 Geom::Point const d1 = _point - _origin;
1248 Geom::Point const d2 = pt - _origin;
1250 Geom::Coord const h1 = Geom::L2(d1); // initial radius
1251 if (h1 < 1e-15) return FALSE;
1252 Geom::Point q1 = d1 / h1; // normalized initial vector to handle
1253 Geom::Coord const h2 = Geom::L2(d2); // new radius
1254 if (fabs(h2) < 1e-15) return FALSE;
1255 Geom::Point q2 = d2 / h2; // normalized new vector to handle
1257 double radians;
1258 if (state & GDK_CONTROL_MASK) {
1259 // Snap to defined angle increments
1260 double cos_t = Geom::dot(q1, q2);
1261 double sin_t = Geom::dot(Geom::rot90(q1), q2);
1262 radians = atan2(sin_t, cos_t);
1263 if (snaps) {
1264 radians = ( M_PI / snaps ) * floor( radians * snaps / M_PI + .5 );
1265 }
1266 q1 = Geom::Point(1, 0);
1267 q2 = Geom::Point(cos(radians), sin(radians));
1268 } else {
1269 radians = atan2(Geom::dot(Geom::rot90(d1), d2),
1270 Geom::dot(d1, d2));
1271 }
1273 Geom::Rotate const r1(q1);
1274 Geom::Rotate const r2(q2);
1276 // Calculate the relative affine
1277 _relative_affine = r2 * r1.inverse();
1279 // Update the handle position
1280 pt = _point * Geom::Translate(-_origin) * _relative_affine * Geom::Translate(_origin);
1282 // Update the status text
1283 double degrees = mod360symm(Geom::rad_to_deg(radians));
1284 _message_context.setF(Inkscape::IMMEDIATE_MESSAGE,
1285 // TRANSLATORS: don't modify the first ";"
1286 // (it will NOT be displayed as ";" - only the second one will be)
1287 _("<b>Rotate</b>: %0.2f°; with <b>Ctrl</b> to snap angle"), degrees);
1289 return TRUE;
1290 }
1292 // Move the item's transformation center
1293 gboolean Inkscape::SelTrans::centerRequest(Geom::Point &pt, guint state)
1294 {
1295 SnapManager &m = _desktop->namedview->snap_manager;
1296 m.setup(_desktop);
1297 m.freeSnapReturnByRef(SnapPreferences::SNAPPOINT_NODE, pt, Inkscape::SNAPSOURCE_HANDLE);
1299 if (state & GDK_CONTROL_MASK) {
1300 if ( fabs(_point[Geom::X] - pt[Geom::X]) > fabs(_point[Geom::Y] - pt[Geom::Y]) ) {
1301 pt[Geom::Y] = _point[Geom::Y];
1302 } else {
1303 pt[Geom::X] = _point[Geom::X];
1304 }
1305 }
1307 if ( !(state & GDK_SHIFT_MASK) && _bbox ) {
1308 // screen pixels to snap center to bbox
1309 #define SNAP_DIST 5
1310 // FIXME: take from prefs
1311 double snap_dist = SNAP_DIST / _desktop->current_zoom();
1313 for (int i = 0; i < 2; i++) {
1314 if (fabs(pt[i] - _bbox->min()[i]) < snap_dist) {
1315 pt[i] = _bbox->min()[i];
1316 }
1317 if (fabs(pt[i] - _bbox->midpoint()[i]) < snap_dist) {
1318 pt[i] = _bbox->midpoint()[i];
1319 }
1320 if (fabs(pt[i] - _bbox->max()[i]) < snap_dist) {
1321 pt[i] = _bbox->max()[i];
1322 }
1323 }
1324 }
1326 // status text
1327 GString *xs = SP_PX_TO_METRIC_STRING(pt[Geom::X], _desktop->namedview->getDefaultMetric());
1328 GString *ys = SP_PX_TO_METRIC_STRING(pt[Geom::Y], _desktop->namedview->getDefaultMetric());
1329 _message_context.setF(Inkscape::NORMAL_MESSAGE, _("Move <b>center</b> to %s, %s"), xs->str, ys->str);
1330 g_string_free(xs, FALSE);
1331 g_string_free(ys, FALSE);
1333 return TRUE;
1334 }
1336 /*
1337 * handlers for handle movement
1338 *
1339 */
1341 void sp_sel_trans_stretch(Inkscape::SelTrans *seltrans, SPSelTransHandle const &handle, Geom::Point &pt, guint state)
1342 {
1343 seltrans->stretch(handle, pt, state);
1344 }
1346 void sp_sel_trans_scale(Inkscape::SelTrans *seltrans, SPSelTransHandle const &, Geom::Point &pt, guint state)
1347 {
1348 seltrans->scale(pt, state);
1349 }
1351 void sp_sel_trans_skew(Inkscape::SelTrans *seltrans, SPSelTransHandle const &handle, Geom::Point &pt, guint state)
1352 {
1353 seltrans->skew(handle, pt, state);
1354 }
1356 void sp_sel_trans_rotate(Inkscape::SelTrans *seltrans, SPSelTransHandle const &, Geom::Point &pt, guint state)
1357 {
1358 seltrans->rotate(pt, state);
1359 }
1361 void Inkscape::SelTrans::stretch(SPSelTransHandle const &/*handle*/, Geom::Point &/*pt*/, guint /*state*/)
1362 {
1363 transform(_absolute_affine, Geom::Point(0, 0)); // we have already accounted for origin, so pass 0,0
1364 }
1366 void Inkscape::SelTrans::scale(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::skew(SPSelTransHandle const &/*handle*/, Geom::Point &/*pt*/, guint /*state*/)
1372 {
1373 transform(_relative_affine, _origin);
1374 }
1376 void Inkscape::SelTrans::rotate(Geom::Point &/*pt*/, guint /*state*/)
1377 {
1378 transform(_relative_affine, _origin);
1379 }
1381 void sp_sel_trans_center(Inkscape::SelTrans *seltrans, SPSelTransHandle const &, Geom::Point &pt, guint /*state*/)
1382 {
1383 seltrans->setCenter(pt);
1384 }
1387 void Inkscape::SelTrans::moveTo(Geom::Point const &xy, guint state)
1388 {
1389 SnapManager &m = _desktop->namedview->snap_manager;
1391 /* The amount that we've moved by during this drag */
1392 Geom::Point dxy = xy - _point;
1394 bool const alt = (state & GDK_MOD1_MASK);
1395 bool const control = (state & GDK_CONTROL_MASK);
1396 bool const shift = (state & GDK_SHIFT_MASK);
1398 if (alt) {
1400 /* Alt pressed means keep offset: snap the moved distance to the grid.
1401 ** FIXME: this will snap to more than just the grid, nowadays.
1402 */
1404 m.setup(_desktop, true, _items_const);
1405 m.freeSnapReturnByRef(SnapPreferences::SNAPPOINT_NODE, dxy, Inkscape::SNAPSOURCE_UNDEFINED);
1407 } else if (shift) {
1408 if (control) { // shift & control: constrained movement without snapping
1409 if (fabs(dxy[Geom::X]) > fabs(dxy[Geom::Y])) {
1410 dxy[Geom::Y] = 0;
1411 } else {
1412 dxy[Geom::X] = 0;
1413 }
1414 }
1415 } else { //!shift: with snapping
1417 /* We're snapping to things, possibly with a constraint to horizontal or
1418 ** vertical movement. Obtain a list of possible translations and then
1419 ** pick the smallest.
1420 */
1422 m.setup(_desktop, false, _items_const);
1424 /* This will be our list of possible translations */
1425 std::list<Inkscape::SnappedPoint> s;
1427 if (control) { // constrained movement with snapping
1429 /* Snap to things, and also constrain to horizontal or vertical movement */
1431 unsigned int dim = fabs(dxy[Geom::X]) > fabs(dxy[Geom::Y]) ? Geom::X : Geom::Y;
1432 // When doing a constrained translation, all points will move in the same direction, i.e.
1433 // either horizontally or vertically. Therefore we only have to specify the direction of
1434 // the constraint-line once. The constraint lines are parallel, but might not be colinear.
1435 // Therefore we will have to set the point through which the constraint-line runs
1436 // individually for each point to be snapped; this will be handled however by _snapTransformed()
1437 s.push_back(m.constrainedSnapTranslation(Inkscape::SnapPreferences::SNAPPOINT_BBOX,
1438 _bbox_points,
1439 _point,
1440 Inkscape::Snapper::ConstraintLine(component_vectors[dim]),
1441 dxy));
1443 s.push_back(m.constrainedSnapTranslation(Inkscape::SnapPreferences::SNAPPOINT_NODE,
1444 _snap_points,
1445 _point,
1446 Inkscape::Snapper::ConstraintLine(component_vectors[dim]),
1447 dxy));
1448 } else { // !control
1450 // Let's leave this timer code here for a while. I'll probably need it in the near future (Diederik van Lierop)
1451 /* GTimeVal starttime;
1452 GTimeVal endtime;
1453 g_get_current_time(&starttime); */
1455 /* Snap to things with no constraint */
1456 s.push_back(m.freeSnapTranslation(Inkscape::SnapPreferences::SNAPPOINT_BBOX, _bbox_points, _point, dxy));
1457 s.push_back(m.freeSnapTranslation(Inkscape::SnapPreferences::SNAPPOINT_NODE, _snap_points, _point, dxy));
1459 /*g_get_current_time(&endtime);
1460 double elapsed = ((((double)endtime.tv_sec - starttime.tv_sec) * G_USEC_PER_SEC + (endtime.tv_usec - starttime.tv_usec))) / 1000.0;
1461 std::cout << "Time spent snapping: " << elapsed << std::endl; */
1462 }
1464 /* Pick one */
1465 Inkscape::SnappedPoint best_snapped_point;
1466 for (std::list<Inkscape::SnappedPoint>::const_iterator i = s.begin(); i != s.end(); i++) {
1467 if (i->getSnapped()) {
1468 if (best_snapped_point.isOtherSnapBetter(*i, true)) {
1469 best_snapped_point = *i;
1470 dxy = i->getTransformation();
1471 }
1472 }
1473 }
1474 if (best_snapped_point.getSnapped()) {
1475 _desktop->snapindicator->set_new_snaptarget(best_snapped_point);
1476 } else {
1477 // We didn't snap, so remove any previous snap indicator
1478 _desktop->snapindicator->remove_snaptarget();
1479 if (control) {
1480 // If we didn't snap, then we should still constrain horizontally or vertically
1481 // (When we did snap, then this constraint has already been enforced by
1482 // calling constrainedSnapTranslation() above)
1483 if (fabs(dxy[Geom::X]) > fabs(dxy[Geom::Y])) {
1484 dxy[Geom::Y] = 0;
1485 } else {
1486 dxy[Geom::X] = 0;
1487 }
1488 }
1489 }
1490 }
1492 Geom::Matrix const move((Geom::Translate(dxy)));
1493 Geom::Point const norm(0, 0);
1494 transform(move, norm);
1496 // status text
1497 GString *xs = SP_PX_TO_METRIC_STRING(dxy[Geom::X], _desktop->namedview->getDefaultMetric());
1498 GString *ys = SP_PX_TO_METRIC_STRING(dxy[Geom::Y], _desktop->namedview->getDefaultMetric());
1499 _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);
1500 g_string_free(xs, TRUE);
1501 g_string_free(ys, TRUE);
1502 }
1504 // Given a location of a handle at the visual bounding box, find the corresponding location at the
1505 // geometrical bounding box
1506 Geom::Point Inkscape::SelTrans::_getGeomHandlePos(Geom::Point const &visual_handle_pos)
1507 {
1508 if ( _snap_bbox_type == SPItem::GEOMETRIC_BBOX) {
1509 // When the selector tool is using geometric bboxes, then the handle is already
1510 // located at one of the geometric bbox corners
1511 return visual_handle_pos;
1512 }
1514 if (!_geometric_bbox) {
1515 //_getGeomHandlePos() can only be used after _geometric_bbox has been defined!
1516 return visual_handle_pos;
1517 }
1519 // Using the Geom::Rect constructor below ensures that "min() < max()", which is important
1520 // because this will also hold for _bbox, and which is required for get_scale_transform_with_stroke()
1521 Geom::Rect new_bbox = Geom::Rect(_origin_for_bboxpoints, visual_handle_pos); // new visual bounding box
1522 // Please note that the new_bbox might in fact be just a single line, for example when stretching (in
1523 // which case the handle and origin will be aligned vertically or horizontally)
1524 Geom::Point normalized_handle_pos = (visual_handle_pos - new_bbox.min()) * Geom::Scale(new_bbox.dimensions()).inverse();
1526 // Calculate the absolute affine while taking into account the scaling of the stroke width
1527 Inkscape::Preferences *prefs = Inkscape::Preferences::get();
1528 bool transform_stroke = prefs->getBool("/options/transform/stroke", true);
1529 Geom::Matrix abs_affine = get_scale_transform_with_stroke (*_bbox, _strokewidth, transform_stroke,
1530 new_bbox.min()[Geom::X], new_bbox.min()[Geom::Y], new_bbox.max()[Geom::X], new_bbox.max()[Geom::Y]);
1532 // Calculate the scaled geometrical bbox
1533 Geom::Rect new_geom_bbox = Geom::Rect(_geometric_bbox->min() * abs_affine, _geometric_bbox->max() * abs_affine);
1534 // Find the location of the handle on this new geometrical bbox
1535 return normalized_handle_pos * Geom::Scale(new_geom_bbox.dimensions()) + new_geom_bbox.min(); //new position of the geometric handle
1536 }
1538 Geom::Scale Inkscape::calcScaleFactors(Geom::Point const &initial_point, Geom::Point const &new_point, Geom::Point const &origin, bool const skew)
1539 {
1540 // Work out the new scale factors for the bbox
1542 Geom::Point const initial_delta = initial_point - origin;
1543 Geom::Point const new_delta = new_point - origin;
1544 Geom::Point const offset = new_point - initial_point;
1545 Geom::Scale scale(1, 1);
1547 for ( unsigned int i = 0 ; i < 2 ; i++ ) {
1548 if ( fabs(initial_delta[i]) > 1e-6 ) {
1549 if (skew) {
1550 scale[i] = offset[1-i] / initial_delta[i];
1551 } else {
1552 scale[i] = new_delta[i] / initial_delta[i];
1553 }
1554 }
1555 }
1557 return scale;
1558 }
1560 // Only for scaling/stretching
1561 Geom::Point Inkscape::SelTrans::_calcAbsAffineDefault(Geom::Scale const default_scale)
1562 {
1563 Geom::Matrix abs_affine = Geom::Translate(-_origin) * Geom::Matrix(default_scale) * Geom::Translate(_origin);
1564 Geom::Point new_bbox_min = _approximate_bbox->min() * abs_affine;
1565 Geom::Point new_bbox_max = _approximate_bbox->max() * abs_affine;
1567 bool transform_stroke = false;
1568 gdouble strokewidth = 0;
1570 if ( _snap_bbox_type != SPItem::GEOMETRIC_BBOX) {
1571 Inkscape::Preferences *prefs = Inkscape::Preferences::get();
1572 transform_stroke = prefs->getBool("/options/transform/stroke", true);
1573 strokewidth = _strokewidth;
1574 }
1576 _absolute_affine = get_scale_transform_with_stroke (*_approximate_bbox, strokewidth, transform_stroke,
1577 new_bbox_min[Geom::X], new_bbox_min[Geom::Y], new_bbox_max[Geom::X], new_bbox_max[Geom::Y]);
1579 // return the new handle position
1580 return ( _point - _origin ) * default_scale + _origin;
1581 }
1583 // Only for scaling/stretching
1584 Geom::Point Inkscape::SelTrans::_calcAbsAffineGeom(Geom::Scale const geom_scale)
1585 {
1586 _relative_affine = Geom::Matrix(geom_scale);
1587 _absolute_affine = Geom::Translate(-_origin_for_specpoints) * _relative_affine * Geom::Translate(_origin_for_specpoints);
1589 Inkscape::Preferences *prefs = Inkscape::Preferences::get();
1590 bool const transform_stroke = prefs->getBool("/options/transform/stroke", true);
1591 Geom::Rect visual_bbox = get_visual_bbox(_geometric_bbox, _absolute_affine, _strokewidth, transform_stroke);
1593 // return the new handle position
1594 return visual_bbox.min() + visual_bbox.dimensions() * Geom::Scale(_handle_x, _handle_y);
1595 }
1597 void Inkscape::SelTrans::_keepClosestPointOnly(std::vector<std::pair<Geom::Point, int> > &points, const Geom::Point &reference)
1598 {
1599 if (points.size() < 2) return;
1601 std::pair<Geom::Point, int> closest_point = std::make_pair(Geom::Point(NR_HUGE, NR_HUGE), SNAPSOURCE_UNDEFINED);
1602 Geom::Coord closest_dist = NR_HUGE;
1604 for(std::vector<std::pair<Geom::Point, int> >::const_iterator i = points.begin(); i != points.end(); i++) {
1605 Geom::Coord dist = Geom::L2((*i).first - reference);
1606 if (i == points.begin() || dist < closest_dist) {
1607 closest_point = *i;
1608 closest_dist = dist;
1609 }
1610 }
1612 points.clear();
1613 points.push_back(closest_point);
1614 }
1616 /*
1617 Local Variables:
1618 mode:c++
1619 c-file-style:"stroustrup"
1620 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
1621 indent-tabs-mode:nil
1622 fill-column:99
1623 End:
1624 */
1625 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :