1 #define __SELTRANS_C__
3 /*
4 * Helper object for transforming selected items
5 *
6 * Author:
7 * Lauris Kaplinski <lauris@kaplinski.com>
8 * bulia byak <buliabyak@users.sf.net>
9 * Carl Hetherington <inkscape@carlh.net>
10 *
11 * Copyright (C) 1999-2002 Lauris Kaplinski
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 <libnr/nr-matrix-ops.h>
23 #include <libnr/nr-matrix-translate-ops.h>
24 #include <libnr/nr-rotate-ops.h>
25 #include <libnr/nr-scale-ops.h>
26 #include <libnr/nr-translate-matrix-ops.h>
27 #include <libnr/nr-translate-ops.h>
28 #include <gdk/gdkkeysyms.h>
29 #include "document.h"
30 #include "sp-namedview.h"
31 #include "desktop.h"
32 #include "desktop-handles.h"
33 #include "desktop-style.h"
34 #include "knot.h"
35 #include "snap.h"
36 #include "selection.h"
37 #include "select-context.h"
38 #include "sp-item.h"
39 #include "sp-item-transform.h"
40 #include "seltrans-handles.h"
41 #include "seltrans.h"
42 #include "selection-chemistry.h"
43 #include "sp-metrics.h"
44 #include "verbs.h"
45 #include <glibmm/i18n.h>
46 #include "display/sp-ctrlline.h"
47 #include "prefs-utils.h"
48 #include "xml/repr.h"
50 #include "isnan.h" //temp fix. make sure included last
52 static void sp_remove_handles(SPKnot *knot[], gint num);
54 static void sp_sel_trans_handle_grab(SPKnot *knot, guint state, gpointer data);
55 static void sp_sel_trans_handle_ungrab(SPKnot *knot, guint state, gpointer data);
56 static void sp_sel_trans_handle_click(SPKnot *knot, guint state, gpointer data);
57 static void sp_sel_trans_handle_new_event(SPKnot *knot, NR::Point *position, guint32 state, gpointer data);
58 static gboolean sp_sel_trans_handle_request(SPKnot *knot, NR::Point *p, guint state, gboolean *data);
60 extern GdkPixbuf *handles[];
62 static gboolean sp_seltrans_handle_event(SPKnot *knot, GdkEvent *event, gpointer)
63 {
64 switch (event->type) {
65 case GDK_MOTION_NOTIFY:
66 break;
67 case GDK_KEY_PRESS:
68 if (get_group0_keyval (&event->key) == GDK_space) {
69 /* stamping mode: both mode(show content and outline) operation with knot */
70 if (!SP_KNOT_IS_GRABBED(knot)) {
71 return FALSE;
72 }
73 SPDesktop *desktop = knot->desktop;
74 Inkscape::SelTrans *seltrans = SP_SELECT_CONTEXT(desktop->event_context)->_seltrans;
75 seltrans->stamp();
76 return TRUE;
77 }
78 break;
79 default:
80 break;
81 }
83 return FALSE;
84 }
86 Inkscape::SelTrans::SelTrans(SPDesktop *desktop) :
87 _desktop(desktop),
88 _selcue(desktop),
89 _state(STATE_SCALE),
90 _show(SHOW_CONTENT),
91 _grabbed(false),
92 _show_handles(true),
93 _bbox(NR::Nothing()),
94 _approximate_bbox(NR::Nothing()),
95 _chandle(NULL),
96 _stamp_cache(NULL),
97 _message_context(desktop->messageStack())
98 {
99 gchar const *prefs_bbox = prefs_get_string_attribute("tools", "bounding_box");
100 _snap_bbox_type = (prefs_bbox != NULL && strcmp(prefs_bbox, "geometric")==0)? SPItem::GEOMETRIC_BBOX : SPItem::APPROXIMATE_BBOX;
102 g_return_if_fail(desktop != NULL);
104 for (int i = 0; i < 8; i++) {
105 _shandle[i] = NULL;
106 _rhandle[i] = NULL;
107 }
109 _updateVolatileState();
110 _current.set_identity();
112 _center_is_set = false; // reread _center from items, or set to bbox midpoint
114 _updateHandles();
116 _selection = sp_desktop_selection(desktop);
118 _norm = sp_canvas_item_new(sp_desktop_controls(desktop),
119 SP_TYPE_CTRL,
120 "anchor", GTK_ANCHOR_CENTER,
121 "mode", SP_CTRL_MODE_COLOR,
122 "shape", SP_CTRL_SHAPE_BITMAP,
123 "size", 13.0,
124 "filled", TRUE,
125 "fill_color", 0x00000000,
126 "stroked", TRUE,
127 "stroke_color", 0x000000a0,
128 "pixbuf", handles[12],
129 NULL);
131 _grip = sp_canvas_item_new(sp_desktop_controls(desktop),
132 SP_TYPE_CTRL,
133 "anchor", GTK_ANCHOR_CENTER,
134 "mode", SP_CTRL_MODE_XOR,
135 "shape", SP_CTRL_SHAPE_CROSS,
136 "size", 7.0,
137 "filled", TRUE,
138 "fill_color", 0xffffff7f,
139 "stroked", TRUE,
140 "stroke_color", 0xffffffff,
141 "pixbuf", handles[12],
142 NULL);
144 sp_canvas_item_hide(_grip);
145 sp_canvas_item_hide(_norm);
147 for (int i = 0; i < 4; i++) {
148 _l[i] = sp_canvas_item_new(sp_desktop_controls(desktop), SP_TYPE_CTRLLINE, NULL);
149 sp_canvas_item_hide(_l[i]);
150 }
152 _sel_changed_connection = _selection->connectChanged(
153 sigc::mem_fun(*this, &Inkscape::SelTrans::_selChanged)
154 );
156 _sel_modified_connection = _selection->connectModified(
157 sigc::mem_fun(*this, &Inkscape::SelTrans::_selModified)
158 );
159 }
161 Inkscape::SelTrans::~SelTrans()
162 {
163 _sel_changed_connection.disconnect();
164 _sel_modified_connection.disconnect();
166 for (unsigned int i = 0; i < 8; i++) {
167 if (_shandle[i]) {
168 g_object_unref(G_OBJECT(_shandle[i]));
169 _shandle[i] = NULL;
170 }
171 if (_rhandle[i]) {
172 g_object_unref(G_OBJECT(_rhandle[i]));
173 _rhandle[i] = NULL;
174 }
175 }
176 if (_chandle) {
177 g_object_unref(G_OBJECT(_chandle));
178 _chandle = NULL;
179 }
181 if (_norm) {
182 gtk_object_destroy(GTK_OBJECT(_norm));
183 _norm = NULL;
184 }
185 if (_grip) {
186 gtk_object_destroy(GTK_OBJECT(_grip));
187 _grip = NULL;
188 }
189 for (int i = 0; i < 4; i++) {
190 if (_l[i]) {
191 gtk_object_destroy(GTK_OBJECT(_l[i]));
192 _l[i] = NULL;
193 }
194 }
196 for (unsigned i = 0; i < _items.size(); i++) {
197 sp_object_unref(SP_OBJECT(_items[i].first), NULL);
198 }
200 _items.clear();
201 _items_centers.clear();
202 }
204 void Inkscape::SelTrans::resetState()
205 {
206 _state = STATE_SCALE;
207 }
209 void Inkscape::SelTrans::increaseState()
210 {
211 if (_state == STATE_SCALE) {
212 _state = STATE_ROTATE;
213 } else {
214 _state = STATE_SCALE;
215 }
217 _center_is_set = true; // no need to reread center
219 _updateHandles();
220 }
222 void Inkscape::SelTrans::setCenter(NR::Point const &p)
223 {
224 _center = p;
225 _center_is_set = true;
227 // Write the new center position into all selected items
228 for (GSList const *l = _desktop->selection->itemList(); l; l = l->next) {
229 SPItem *it = (SPItem*)SP_OBJECT(l->data);
230 it->setCenter(p);
231 // only set the value; updating repr and document_done will be done once, on ungrab
232 }
234 _updateHandles();
235 }
237 void Inkscape::SelTrans::grab(NR::Point const &p, gdouble x, gdouble y, bool show_handles)
238 {
239 Inkscape::Selection *selection = sp_desktop_selection(_desktop);
241 g_return_if_fail(!_grabbed);
243 _grabbed = true;
244 _show_handles = show_handles;
245 _updateVolatileState();
246 _current.set_identity();
248 _changed = false;
250 if (_empty) {
251 return;
252 }
254 for (GSList const *l = selection->itemList(); l; l = l->next) {
255 SPItem *it = (SPItem*)sp_object_ref(SP_OBJECT(l->data), NULL);
256 _items.push_back(std::pair<SPItem *, NR::Matrix>(it, sp_item_i2d_affine(it)));
257 _items_centers.push_back(std::pair<SPItem *, NR::Point>(it, it->getCenter())); // for content-dragging, we need to remember original centers
258 }
260 _current.set_identity();
262 _point = p;
264 // The selector tool should snap the bbox, special snappoints, and path nodes
265 // (The special points are the handles, center, rotation axis, font baseline, ends of spiral, etc.)
267 // First, determine the bounding box for snapping ...
268 _bbox = selection->bounds(_snap_bbox_type);
269 _approximate_bbox = selection->bounds(SPItem::APPROXIMATE_BBOX); // Used for correctly scaling the strokewidth
271 // Next, get all points to consider for snapping
272 SnapManager const &m = _desktop->namedview->snap_manager;
273 _snap_points = selection->getSnapPoints(m.getIncludeItemCenter());
274 std::vector<NR::Point> snap_points_hull = selection->getSnapPointsConvexHull();
275 if (_snap_points.size() > 100) {
276 /* Snapping a huge number of nodes will take way too long, so limit the number of snappable nodes
277 An average user would rarely ever try to snap such a large number of nodes anyway, because
278 (s)he could hardly discern which node would be snapping */
279 _snap_points = snap_points_hull;
280 // Unfortunately, by now we will have lost the font-baseline snappoints :-(
281 }
283 // Find bbox hulling all special points, which excludes stroke width. Here we need to include the
284 // path nodes, for example because a rectangle which has been converted to a path doesn't have
285 // any other special points
286 NR::Rect snap_points_bbox;
287 if ( snap_points_hull.empty() == false ) {
288 std::vector<NR::Point>::iterator i = snap_points_hull.begin();
289 snap_points_bbox = NR::Rect(*i, *i);
290 i++;
291 while (i != snap_points_hull.end()) {
292 snap_points_bbox.expandTo(*i);
293 i++;
294 }
295 }
297 _bbox_points.clear();
298 if (_bbox) {
299 // ... and add the bbox corners to _bbox_points
300 for ( unsigned i = 0 ; i < 4 ; i++ ) {
301 _bbox_points.push_back(_bbox->corner(i));
302 }
303 // There are two separate "opposites" (i.e. opposite w.r.t. the handle being dragged):
304 // - one for snapping the boundingbox, which can be either visual or geometric
305 // - one for snapping the special points
306 // The "opposite" in case of a geometric boundingbox always coincides with the "opposite" for the special points
307 // These distinct "opposites" are needed in the snapmanager to avoid bugs such as #1540195 (in which
308 // a box is caught between to guides)
309 _opposite_for_bboxpoints = _bbox->min() + _bbox->dimensions() * NR::scale(1-x, 1-y);
310 _opposite_for_specpoints = (snap_points_bbox.min() + (snap_points_bbox.dimensions() * NR::scale(1-x, 1-y) ) );
311 // Only a single "opposite" can be used in calculating transformations.
312 _opposite = _opposite_for_bboxpoints;
313 }
315 // The lines below are usefull for debugging any snapping issues, as they'll spit out all points that are considered for snapping
317 /*std::cout << "Number of snap points: " << _snap_points.size() << std::endl;
318 for (std::vector<NR::Point>::const_iterator i = _snap_points.begin(); i != _snap_points.end(); i++)
319 {
320 std::cout << " " << *i << std::endl;
321 }
323 std::cout << "Number of bbox points: " << _bbox_points.size() << std::endl;
324 for (std::vector<NR::Point>::const_iterator i = _bbox_points.begin(); i != _bbox_points.end(); i++)
325 {
326 std::cout << " " << *i << std::endl;
327 }*/
329 if ((x != -1) && (y != -1)) {
330 sp_canvas_item_show(_norm);
331 sp_canvas_item_show(_grip);
332 }
334 if (_show == SHOW_OUTLINE) {
335 for (int i = 0; i < 4; i++)
336 sp_canvas_item_show(_l[i]);
337 }
339 _updateHandles();
340 g_return_if_fail(_stamp_cache == NULL);
341 }
343 void Inkscape::SelTrans::transform(NR::Matrix const &rel_affine, NR::Point const &norm)
344 {
345 g_return_if_fail(_grabbed);
346 g_return_if_fail(!_empty);
348 NR::Matrix const affine( NR::translate(-norm) * rel_affine * NR::translate(norm) );
350 if (_show == SHOW_CONTENT) {
351 // update the content
352 for (unsigned i = 0; i < _items.size(); i++) {
353 SPItem &item = *_items[i].first;
354 NR::Matrix const &prev_transform = _items[i].second;
355 sp_item_set_i2d_affine(&item, prev_transform * affine);
356 }
357 } else {
358 if (_bbox) {
359 NR::Point p[4];
360 /* update the outline */
361 for (unsigned i = 0 ; i < 4 ; i++) {
362 p[i] = _bbox->corner(i) * affine;
363 }
364 for (unsigned i = 0 ; i < 4 ; i++) {
365 sp_ctrlline_set_coords(SP_CTRLLINE(_l[i]), p[i], p[(i+1)%4]);
366 }
367 }
368 }
370 _current = affine;
371 _changed = true;
372 _updateHandles();
373 }
375 void Inkscape::SelTrans::ungrab()
376 {
377 g_return_if_fail(_grabbed);
378 _grabbed = false;
379 _show_handles = true;
381 Inkscape::Selection *selection = sp_desktop_selection(_desktop);
382 _updateVolatileState();
384 for (unsigned i = 0; i < _items.size(); i++) {
385 sp_object_unref(SP_OBJECT(_items[i].first), NULL);
386 }
388 sp_canvas_item_hide(_norm);
389 sp_canvas_item_hide(_grip);
391 if (_show == SHOW_OUTLINE) {
392 for (int i = 0; i < 4; i++)
393 sp_canvas_item_hide(_l[i]);
394 }
396 if (_stamp_cache) {
397 g_slist_free(_stamp_cache);
398 _stamp_cache = NULL;
399 }
401 _message_context.clear();
403 if (!_empty && _changed) {
404 sp_selection_apply_affine(selection, _current, (_show == SHOW_OUTLINE)? true : false);
405 if (_center) {
406 *_center *= _current;
407 _center_is_set = true;
408 }
410 // If dragging showed content live, sp_selection_apply_affine cannot change the centers
411 // appropriately - it does not know the original positions of the centers (all objects already have
412 // the new bboxes). So we need to reset the centers from our saved array.
413 if (_show != SHOW_OUTLINE && !_current.is_translation()) {
414 for (unsigned i = 0; i < _items_centers.size(); i++) {
415 SPItem *currentItem = _items_centers[i].first;
416 if (currentItem->isCenterSet()) { // only if it's already set
417 currentItem->setCenter (_items_centers[i].second * _current);
418 SP_OBJECT(currentItem)->updateRepr();
419 }
420 }
421 }
423 _items.clear();
424 _items_centers.clear();
426 if (_current.is_translation()) {
427 sp_document_done(sp_desktop_document(_desktop), SP_VERB_CONTEXT_SELECT,
428 _("Move"));
429 } else if (_current.is_scale()) {
430 sp_document_done(sp_desktop_document(_desktop), SP_VERB_CONTEXT_SELECT,
431 _("Scale"));
432 } else if (_current.is_rotation()) {
433 sp_document_done(sp_desktop_document(_desktop), SP_VERB_CONTEXT_SELECT,
434 _("Rotate"));
435 } else {
436 sp_document_done(sp_desktop_document(_desktop), SP_VERB_CONTEXT_SELECT,
437 _("Skew"));
438 }
440 } else {
442 if (_center_is_set) {
443 // we were dragging center; update reprs and commit undoable action
444 for (GSList const *l = _desktop->selection->itemList(); l; l = l->next) {
445 SPItem *it = (SPItem*)SP_OBJECT(l->data);
446 SP_OBJECT(it)->updateRepr();
447 }
448 sp_document_done (sp_desktop_document(_desktop), SP_VERB_CONTEXT_SELECT,
449 _("Set center"));
450 }
452 _items.clear();
453 _items_centers.clear();
454 _updateHandles();
455 }
456 }
458 /* fixme: This is really bad, as we compare positions for each stamp (Lauris) */
459 /* fixme: IMHO the best way to keep sort cache would be to implement timestamping at last */
461 void Inkscape::SelTrans::stamp()
462 {
463 Inkscape::Selection *selection = sp_desktop_selection(_desktop);
465 bool fixup = !_grabbed;
466 if ( fixup && _stamp_cache ) {
467 // TODO - give a proper fix. Simple temproary work-around for the grab() issue
468 g_slist_free(_stamp_cache);
469 _stamp_cache = NULL;
470 }
472 /* stamping mode */
473 if (!_empty) {
474 GSList *l;
475 if (_stamp_cache) {
476 l = _stamp_cache;
477 } else {
478 /* Build cache */
479 l = g_slist_copy((GSList *) selection->itemList());
480 l = g_slist_sort(l, (GCompareFunc) sp_object_compare_position);
481 _stamp_cache = l;
482 }
484 while (l) {
485 SPItem *original_item = SP_ITEM(l->data);
486 Inkscape::XML::Node *original_repr = SP_OBJECT_REPR(original_item);
488 // remember the position of the item
489 gint pos = original_repr->position();
490 // remember parent
491 Inkscape::XML::Node *parent = sp_repr_parent(original_repr);
493 Inkscape::XML::Node *copy_repr = original_repr->duplicate(parent->document());
495 // add the new repr to the parent
496 parent->appendChild(copy_repr);
497 // move to the saved position
498 copy_repr->setPosition(pos > 0 ? pos : 0);
500 SPItem *copy_item = (SPItem *) sp_desktop_document(_desktop)->getObjectByRepr(copy_repr);
502 NR::Matrix const *new_affine;
503 if (_show == SHOW_OUTLINE) {
504 NR::Matrix const i2d(sp_item_i2d_affine(original_item));
505 NR::Matrix const i2dnew( i2d * _current );
506 sp_item_set_i2d_affine(copy_item, i2dnew);
507 new_affine = ©_item->transform;
508 } else {
509 new_affine = &original_item->transform;
510 }
512 sp_item_write_transform(copy_item, copy_repr, *new_affine);
514 if ( copy_item->isCenterSet() && _center ) {
515 copy_item->setCenter(*_center * _current);
516 }
518 Inkscape::GC::release(copy_repr);
519 l = l->next;
520 }
521 sp_document_done(sp_desktop_document(_desktop), SP_VERB_CONTEXT_SELECT,
522 _("Stamp"));
523 }
525 if ( fixup && _stamp_cache ) {
526 // TODO - give a proper fix. Simple temproary work-around for the grab() issue
527 g_slist_free(_stamp_cache);
528 _stamp_cache = NULL;
529 }
530 }
532 void Inkscape::SelTrans::_updateHandles()
533 {
534 if ( !_show_handles || _empty )
535 {
536 sp_remove_handles(_shandle, 8);
537 sp_remove_handles(_rhandle, 8);
538 sp_remove_handles(&_chandle, 1);
539 return;
540 }
542 // center handle
543 if ( _chandle == NULL ) {
544 _chandle = sp_knot_new(_desktop, _("<b>Center</b> of rotation and skewing: drag to reposition; scaling with Shift also uses this center"));
546 _chandle->setShape (SP_CTRL_SHAPE_BITMAP);
547 _chandle->setSize (13);
548 _chandle->setAnchor (handle_center.anchor);
549 _chandle->setMode (SP_CTRL_MODE_XOR);
550 _chandle->setFill(0x00000000, 0x00000000, 0x00000000);
551 _chandle->setStroke(0x000000ff, 0xff0000b0, 0xff0000b0);
552 _chandle->setPixbuf(handles[handle_center.control]);
553 sp_knot_update_ctrl(_chandle);
555 g_signal_connect(G_OBJECT(_chandle), "request",
556 G_CALLBACK(sp_sel_trans_handle_request), (gpointer) &handle_center);
557 g_signal_connect(G_OBJECT(_chandle), "moved",
558 G_CALLBACK(sp_sel_trans_handle_new_event), (gpointer) &handle_center);
559 g_signal_connect(G_OBJECT(_chandle), "grabbed",
560 G_CALLBACK(sp_sel_trans_handle_grab), (gpointer) &handle_center);
561 g_signal_connect(G_OBJECT(_chandle), "ungrabbed",
562 G_CALLBACK(sp_sel_trans_handle_ungrab), (gpointer) &handle_center);
563 g_signal_connect(G_OBJECT(_chandle), "clicked",
564 G_CALLBACK(sp_sel_trans_handle_click), (gpointer) &handle_center);
565 }
567 sp_remove_handles(&_chandle, 1);
568 if ( _state == STATE_SCALE ) {
569 sp_remove_handles(_rhandle, 8);
570 _showHandles(_shandle, handles_scale, 8,
571 _("<b>Squeeze or stretch</b> selection; with <b>Ctrl</b> to scale uniformly; with <b>Shift</b> to scale around rotation center"),
572 _("<b>Scale</b> selection; with <b>Ctrl</b> to scale uniformly; with <b>Shift</b> to scale around rotation center"));
573 } else {
574 sp_remove_handles(_shandle, 8);
575 _showHandles(_rhandle, handles_rotate, 8,
576 _("<b>Skew</b> selection; with <b>Ctrl</b> to snap angle; with <b>Shift</b> to skew around the opposite side"),
577 _("<b>Rotate</b> selection; with <b>Ctrl</b> to snap angle; with <b>Shift</b> to rotate around the opposite corner"));
578 }
580 if (!_center_is_set) {
581 _center = _desktop->selection->center();
582 _center_is_set = true;
583 }
585 if ( _state == STATE_SCALE || !_center ) {
586 sp_knot_hide(_chandle);
587 } else {
588 sp_knot_show(_chandle);
589 sp_knot_moveto(_chandle, &*_center);
590 }
591 }
593 void Inkscape::SelTrans::_updateVolatileState()
594 {
595 Inkscape::Selection *selection = sp_desktop_selection(_desktop);
596 _empty = selection->isEmpty();
598 if (_empty) {
599 return;
600 }
602 //Update the bboxes
603 _bbox = selection->bounds(_snap_bbox_type);
604 _approximate_bbox = selection->bounds(SPItem::APPROXIMATE_BBOX);
606 if (!_bbox) {
607 _empty = true;
608 return;
609 }
611 _strokewidth = stroke_average_width (selection->itemList());
612 }
614 static void sp_remove_handles(SPKnot *knot[], gint num)
615 {
616 for (int i = 0; i < num; i++) {
617 if (knot[i] != NULL) {
618 sp_knot_hide(knot[i]);
619 }
620 }
621 }
623 void Inkscape::SelTrans::_showHandles(SPKnot *knot[], SPSelTransHandle const handle[], gint num,
624 gchar const *even_tip, gchar const *odd_tip)
625 {
626 g_return_if_fail( !_empty );
628 for (int i = 0; i < num; i++) {
629 if (knot[i] == NULL) {
630 knot[i] = sp_knot_new(_desktop, i % 2 ? even_tip : odd_tip);
632 knot[i]->setShape (SP_CTRL_SHAPE_BITMAP);
633 knot[i]->setSize (13);
634 knot[i]->setAnchor (handle[i].anchor);
635 knot[i]->setMode (SP_CTRL_MODE_XOR);
636 knot[i]->setFill(0x000000ff, 0x00ff6600, 0x00ff6600); // inversion, green, green
637 knot[i]->setStroke(0x000000ff, 0x000000ff, 0x000000ff); // inversion
638 knot[i]->setPixbuf(handles[handle[i].control]);
639 sp_knot_update_ctrl(knot[i]);
641 g_signal_connect(G_OBJECT(knot[i]), "request",
642 G_CALLBACK(sp_sel_trans_handle_request), (gpointer) &handle[i]);
643 g_signal_connect(G_OBJECT(knot[i]), "moved",
644 G_CALLBACK(sp_sel_trans_handle_new_event), (gpointer) &handle[i]);
645 g_signal_connect(G_OBJECT(knot[i]), "grabbed",
646 G_CALLBACK(sp_sel_trans_handle_grab), (gpointer) &handle[i]);
647 g_signal_connect(G_OBJECT(knot[i]), "ungrabbed",
648 G_CALLBACK(sp_sel_trans_handle_ungrab), (gpointer) &handle[i]);
649 g_signal_connect(G_OBJECT(knot[i]), "event", G_CALLBACK(sp_seltrans_handle_event), (gpointer) &handle[i]);
650 }
651 sp_knot_show(knot[i]);
653 NR::Point const handle_pt(handle[i].x, handle[i].y);
654 // shouldn't have nullary bbox, but knots
655 g_assert(_bbox);
656 NR::Point p( _bbox->min()
657 + ( _bbox->dimensions()
658 * NR::scale(handle_pt) ) );
660 sp_knot_moveto(knot[i], &p);
661 }
662 }
664 static void sp_sel_trans_handle_grab(SPKnot *knot, guint state, gpointer data)
665 {
666 SP_SELECT_CONTEXT(knot->desktop->event_context)->_seltrans->handleGrab(
667 knot, state, *(SPSelTransHandle const *) data
668 );
669 }
671 static void sp_sel_trans_handle_ungrab(SPKnot *knot, guint /*state*/, gpointer /*data*/)
672 {
673 SP_SELECT_CONTEXT(knot->desktop->event_context)->_seltrans->ungrab();
674 }
676 static void sp_sel_trans_handle_new_event(SPKnot *knot, NR::Point *position, guint state, gpointer data)
677 {
678 SP_SELECT_CONTEXT(knot->desktop->event_context)->_seltrans->handleNewEvent(
679 knot, position, state, *(SPSelTransHandle const *) data
680 );
681 }
683 static gboolean sp_sel_trans_handle_request(SPKnot *knot, NR::Point *position, guint state, gboolean *data)
684 {
685 return SP_SELECT_CONTEXT(knot->desktop->event_context)->_seltrans->handleRequest(
686 knot, position, state, *(SPSelTransHandle const *) data
687 );
688 }
690 static void sp_sel_trans_handle_click(SPKnot *knot, guint state, gpointer data)
691 {
692 SP_SELECT_CONTEXT(knot->desktop->event_context)->_seltrans->handleClick(
693 knot, state, *(SPSelTransHandle const *) data
694 );
695 }
697 void Inkscape::SelTrans::handleClick(SPKnot */*knot*/, guint state, SPSelTransHandle const &handle)
698 {
699 switch (handle.anchor) {
700 case GTK_ANCHOR_CENTER:
701 if (state & GDK_SHIFT_MASK) {
702 // Unset the center position for all selected items
703 for (GSList const *l = _desktop->selection->itemList(); l; l = l->next) {
704 SPItem *it = (SPItem*)(SP_OBJECT(l->data));
705 it->unsetCenter();
706 SP_OBJECT(it)->updateRepr();
707 _center_is_set = false; // center has changed
708 _updateHandles();
709 }
710 sp_document_done (sp_desktop_document(_desktop), SP_VERB_CONTEXT_SELECT,
711 _("Reset center"));
712 }
713 break;
714 default:
715 break;
716 }
717 }
719 void Inkscape::SelTrans::handleGrab(SPKnot *knot, guint /*state*/, SPSelTransHandle const &handle)
720 {
721 switch (handle.anchor) {
722 case GTK_ANCHOR_CENTER:
723 g_object_set(G_OBJECT(_grip),
724 "shape", SP_CTRL_SHAPE_BITMAP,
725 "size", 13.0,
726 NULL);
727 sp_canvas_item_show(_grip);
728 break;
729 default:
730 g_object_set(G_OBJECT(_grip),
731 "shape", SP_CTRL_SHAPE_CROSS,
732 "size", 7.0,
733 NULL);
734 sp_canvas_item_show(_norm);
735 sp_canvas_item_show(_grip);
737 break;
738 }
740 grab(sp_knot_position(knot), handle.x, handle.y, FALSE);
741 }
744 void Inkscape::SelTrans::handleNewEvent(SPKnot *knot, NR::Point *position, guint state, SPSelTransHandle const &handle)
745 {
746 if (!SP_KNOT_IS_GRABBED(knot)) {
747 return;
748 }
750 // in case items have been unhooked from the document, don't
751 // try to continue processing events for them.
752 for (unsigned int i = 0; i < _items.size(); i++) {
753 if (!SP_OBJECT_DOCUMENT(SP_OBJECT(_items[i].first)) ) {
754 return;
755 }
756 }
758 handle.action(this, handle, *position, state);
759 }
762 gboolean Inkscape::SelTrans::handleRequest(SPKnot *knot, NR::Point *position, guint state, SPSelTransHandle const &handle)
763 {
764 if (!SP_KNOT_IS_GRABBED(knot)) {
765 return TRUE;
766 }
768 knot->desktop->setPosition(*position);
770 if ((!(state & GDK_SHIFT_MASK) == !(_state == STATE_ROTATE)) && (&handle != &handle_center)) {
771 _origin = _opposite;
772 _origin_for_bboxpoints = _opposite_for_bboxpoints;
773 _origin_for_specpoints = _opposite_for_specpoints;
774 } else if (_center) {
775 _origin = *_center;
776 _origin_for_bboxpoints = *_center;
777 _origin_for_specpoints = *_center;
778 } else {
779 // FIXME
780 return TRUE;
781 }
782 if (handle.request(this, handle, *position, state)) {
783 sp_knot_set_position(knot, position, state);
784 SP_CTRL(_grip)->moveto(*position);
785 SP_CTRL(_norm)->moveto(_origin);
786 }
788 return TRUE;
789 }
792 void Inkscape::SelTrans::_selChanged(Inkscape::Selection */*selection*/)
793 {
794 if (!_grabbed) {
795 // reread in case it changed on the fly:
796 gchar const *prefs_bbox = prefs_get_string_attribute("tools", "bounding_box");
797 _snap_bbox_type = (prefs_bbox != NULL && strcmp(prefs_bbox, "geometric")==0)? SPItem::GEOMETRIC_BBOX : SPItem::APPROXIMATE_BBOX;
798 //SPItem::APPROXIMATE_BBOX will be replaced by SPItem::VISUAL_BBOX, as soon as the latter is implemented properly
800 _updateVolatileState();
801 _current.set_identity();
802 _center_is_set = false; // center(s) may have changed
803 _updateHandles();
804 }
805 }
807 void Inkscape::SelTrans::_selModified(Inkscape::Selection */*selection*/, guint /*flags*/)
808 {
809 if (!_grabbed) {
810 _updateVolatileState();
811 _current.set_identity();
813 // reset internal flag
814 _changed = false;
816 _center_is_set = false; // center(s) may have changed
818 _updateHandles();
819 }
820 }
822 /*
823 * handlers for handle move-request
824 */
826 /** Returns -1 or 1 according to the sign of x. Returns 1 for 0 and NaN. */
827 static double sign(double const x)
828 {
829 return ( x < 0
830 ? -1
831 : 1 );
832 }
834 gboolean sp_sel_trans_scale_request(Inkscape::SelTrans *seltrans,
835 SPSelTransHandle const &, NR::Point &pt, guint state)
836 {
837 return seltrans->scaleRequest(pt, state);
838 }
840 gboolean sp_sel_trans_stretch_request(Inkscape::SelTrans *seltrans,
841 SPSelTransHandle const &handle, NR::Point &pt, guint state)
842 {
843 return seltrans->stretchRequest(handle, pt, state);
844 }
846 gboolean sp_sel_trans_skew_request(Inkscape::SelTrans *seltrans,
847 SPSelTransHandle const &handle, NR::Point &pt, guint state)
848 {
849 return seltrans->skewRequest(handle, pt, state);
850 }
852 gboolean sp_sel_trans_rotate_request(Inkscape::SelTrans *seltrans,
853 SPSelTransHandle const &, NR::Point &pt, guint state)
854 {
855 return seltrans->rotateRequest(pt, state);
856 }
858 gboolean sp_sel_trans_center_request(Inkscape::SelTrans *seltrans,
859 SPSelTransHandle const &, NR::Point &pt, guint state)
860 {
861 return seltrans->centerRequest(pt, state);
862 }
864 gboolean Inkscape::SelTrans::scaleRequest(NR::Point &pt, guint state)
865 {
866 using NR::X;
867 using NR::Y;
869 NR::Point d = _point - _origin;
870 NR::scale s(0, 0);
872 /* Work out the new scale factors `s' */
873 for ( unsigned int i = 0 ; i < 2 ; i++ ) {
874 if ( fabs(d[i]) > 0.001 ) {
875 s[i] = ( pt[i] - _origin[i] ) / d[i];
876 if ( fabs(s[i]) < 1e-9 ) {
877 s[i] = 1e-9;
878 }
879 }
880 }
882 if (state & GDK_MOD1_MASK) { // scale by an integer multiplier/divider
883 for ( unsigned int i = 0 ; i < 2 ; i++ ) {
884 if (fabs(s[i]) > 1)
885 s[i] = round(s[i]);
886 else
887 s[i] = 1/round(1/(MIN(s[i], 10)));
888 }
889 }
891 SnapManager const &m = _desktop->namedview->snap_manager;
893 /* Get a STL list of the selected items.
894 ** FIXME: this should probably be done by Inkscape::Selection.
895 */
896 std::list<SPItem const*> it;
897 for (GSList const *i = _selection->itemList(); i != NULL; i = i->next) {
898 it.push_back(reinterpret_cast<SPItem*>(i->data));
899 }
901 if ((state & GDK_CONTROL_MASK) || _desktop->isToolboxButtonActive ("lock")) {
902 // Scale is locked to a 1:1 aspect ratio, so that s[X] must be made to equal s[Y].
903 //
904 // The aspect-ratio must be locked before snapping
905 if (fabs(s[NR::X]) > fabs(s[NR::Y])) {
906 s[NR::X] = fabs(s[NR::Y]) * sign(s[NR::X]);
907 } else {
908 s[NR::Y] = fabs(s[NR::X]) * sign(s[NR::Y]);
909 }
911 // Snap along a suitable constraint vector from the origin.
912 std::pair<NR::scale, bool> bb = m.constrainedSnapScale(Snapper::SNAPPOINT_BBOX,
913 _bbox_points,
914 it,
915 s,
916 _origin_for_bboxpoints);
918 std::pair<NR::scale, bool> sn = m.constrainedSnapScale(Snapper::SNAPPOINT_NODE,
919 _snap_points,
920 it,
921 s,
922 _origin_for_specpoints);
924 if (bb.second || sn.second) { // If we snapped to something
925 /* Choose the smaller difference in scale. Since s[X] == s[Y] we can
926 ** just compare difference in s[X].
927 */
928 double const bd = bb.second ? fabs(bb.first[NR::X] - s[NR::X]) : NR_HUGE;
929 double const sd = sn.second ? fabs(sn.first[NR::X] - s[NR::X]) : NR_HUGE;
930 s = (bd < sd) ? bb.first : sn.first;
931 }
933 } else {
934 /* Scale aspect ratio is unlocked */
936 std::pair<NR::scale, bool> bb = m.freeSnapScale(Snapper::SNAPPOINT_BBOX,
937 _bbox_points,
938 it,
939 s,
940 _origin_for_bboxpoints);
941 std::pair<NR::scale, bool> sn = m.freeSnapScale(Snapper::SNAPPOINT_NODE,
942 _snap_points,
943 it,
944 s,
945 _origin_for_specpoints);
947 if (bb.second || sn.second) { // If we snapped to something
948 /* Pick the snap that puts us closest to the original scale */
949 NR::Coord bd = bb.second ?
950 fabs(NR::L2(NR::Point(bb.first[NR::X], bb.first[NR::Y])) -
951 NR::L2(NR::Point(s[NR::X], s[NR::Y])))
952 : NR_HUGE;
953 NR::Coord sd = sn.second ?
954 fabs(NR::L2(NR::Point(sn.first[NR::X], sn.first[NR::Y])) -
955 NR::L2(NR::Point(s[NR::X], s[NR::Y])))
956 : NR_HUGE;
957 s = (bd < sd) ? bb.first : sn.first;
958 }
959 }
961 /* Update the knot position */
962 pt = ( _point - _origin ) * s + _origin;
964 /* Status text */
965 _message_context.setF(Inkscape::NORMAL_MESSAGE,
966 _("<b>Scale</b>: %0.2f%% x %0.2f%%; with <b>Ctrl</b> to lock ratio"),
967 100 * s[NR::X], 100 * s[NR::Y]);
969 return TRUE;
970 }
972 gboolean Inkscape::SelTrans::stretchRequest(SPSelTransHandle const &handle, NR::Point &pt, guint state)
973 {
974 using NR::X;
975 using NR::Y;
977 NR::Dim2 axis, perp;
979 switch (handle.cursor) {
980 case GDK_TOP_SIDE:
981 case GDK_BOTTOM_SIDE:
982 axis = NR::Y;
983 perp = NR::X;
984 break;
985 case GDK_LEFT_SIDE:
986 case GDK_RIGHT_SIDE:
987 axis = NR::X;
988 perp = NR::Y;
989 break;
990 default:
991 g_assert_not_reached();
992 return TRUE;
993 };
995 if ( fabs( _point[axis] - _origin[axis] ) < 1e-15 ) {
996 return FALSE;
997 }
999 NR::scale s(1, 1);
1000 s[axis] = ( ( pt[axis] - _origin[axis] )
1001 / ( _point[axis] - _origin[axis] ) );
1002 if ( fabs(s[axis]) < 1e-15 ) {
1003 s[axis] = 1e-15;
1004 }
1006 if (state & GDK_MOD1_MASK) { // scale by an integer multiplier/divider
1007 if (fabs(s[axis]) > 1)
1008 s[axis] = round(s[axis]);
1009 else
1010 s[axis] = 1/round(1/(MIN(s[axis], 10)));
1011 }
1013 /* Get a STL list of the selected items.
1014 ** FIXME: this should probably be done by Inkscape::Selection.
1015 */
1016 std::list<SPItem const*> it;
1017 for (GSList const *i = _selection->itemList(); i != NULL; i = i->next) {
1018 it.push_back(reinterpret_cast<SPItem*>(i->data));
1019 }
1021 SnapManager const &m = _desktop->namedview->snap_manager;
1023 if ( state & GDK_CONTROL_MASK ) {
1024 // on ctrl, apply symmetrical scaling instead of stretching
1025 s[perp] = fabs(s[axis]);
1027 std::pair<NR::Coord, bool> const bb = m.constrainedSnapStretch(
1028 Snapper::SNAPPOINT_BBOX,
1029 _bbox_points,
1030 it,
1031 s[axis],
1032 _origin_for_bboxpoints,
1033 axis,
1034 true);
1036 std::pair<NR::Coord, bool> const sn = m.constrainedSnapStretch(
1037 Snapper::SNAPPOINT_NODE,
1038 _snap_points,
1039 it,
1040 s[axis],
1041 _origin_for_specpoints,
1042 axis,
1043 true);
1045 if (bb.second || sn.second) { // If we snapped to something
1046 /* Choose the smaller difference in scale */
1047 NR::Coord const bd = bb.second ? fabs(bb.first - s[axis]) : NR_HUGE;
1048 NR::Coord const sd = sn.second ? fabs(sn.first - s[axis]) : NR_HUGE;
1049 NR::Coord const ratio = (bd < sd) ? bb.first : sn.first;
1051 if (fabs(ratio) < NR_HUGE) {
1052 s[axis] = fabs(ratio) * sign(s[axis]);
1053 }
1054 s[perp] = fabs(s[axis]);
1055 }
1056 } else {
1058 std::pair<NR::Coord, bool> const bb = m.constrainedSnapStretch(
1059 Snapper::SNAPPOINT_BBOX,
1060 _bbox_points,
1061 it,
1062 s[axis],
1063 _origin_for_bboxpoints,
1064 axis,
1065 false);
1067 std::pair<NR::Coord, bool> const sn = m.constrainedSnapStretch(
1068 Snapper::SNAPPOINT_NODE,
1069 _snap_points,
1070 it,
1071 s[axis],
1072 _origin_for_specpoints,
1073 axis,
1074 false);
1076 if (bb.second || sn.second) { // If we snapped to something
1077 /* Choose the smaller difference in scale */
1078 NR::Coord const bd = bb.second ? fabs(bb.first - s[axis]) : NR_HUGE;
1079 NR::Coord const sd = sn.second ? fabs(sn.first - s[axis]) : NR_HUGE;
1080 NR::Coord const nw = (bd < sd) ? bb.first : sn.first; // new stretch scale
1081 if (fabs(nw) < NR_HUGE) {
1082 s[axis] = nw;
1083 }
1084 s[perp] = 1;
1085 }
1086 }
1088 pt = ( _point - _origin ) * NR::scale(s) + _origin;
1089 if (isNaN(pt[X] + pt[Y])) {
1090 g_warning("point=(%g, %g), norm=(%g, %g), s=(%g, %g)\n",
1091 _point[X], _point[Y], _origin[X], _origin[Y], s[X], s[Y]);
1092 }
1094 // status text
1095 _message_context.setF(Inkscape::NORMAL_MESSAGE,
1096 _("<b>Scale</b>: %0.2f%% x %0.2f%%; with <b>Ctrl</b> to lock ratio"),
1097 100 * s[NR::X], 100 * s[NR::Y]);
1099 return TRUE;
1100 }
1102 gboolean Inkscape::SelTrans::skewRequest(SPSelTransHandle const &handle, NR::Point &pt, guint state)
1103 {
1104 using NR::X;
1105 using NR::Y;
1107 if (handle.cursor != GDK_SB_V_DOUBLE_ARROW && handle.cursor != GDK_SB_H_DOUBLE_ARROW) {
1108 return FALSE;
1109 }
1111 NR::Dim2 dim_a;
1112 NR::Dim2 dim_b;
1113 if (handle.cursor == GDK_SB_V_DOUBLE_ARROW) {
1114 dim_a = X;
1115 dim_b = Y;
1116 } else {
1117 dim_a = Y;
1118 dim_b = X;
1119 }
1121 double skew[2];
1122 double s[2] = { 1.0, 1.0 };
1124 if (fabs(_point[dim_a] - _origin[dim_a]) < NR_EPSILON) {
1125 return FALSE;
1126 }
1128 skew[dim_a] = ( pt[dim_b] - _point[dim_b] ) / ( _point[dim_a] - _origin[dim_a] );
1130 s[dim_a] = ( pt[dim_a] - _origin[dim_a] ) / ( _point[dim_a] - _origin[dim_a] );
1132 if ( fabs(s[dim_a]) < 1 ) {
1133 s[dim_a] = sign(s[dim_a]);
1134 } else {
1135 s[dim_a] = floor( s[dim_a] + 0.5 );
1136 }
1138 double radians = atan(skew[dim_a] / s[dim_a]);
1140 if (state & GDK_CONTROL_MASK) {
1142 int snaps = prefs_get_int_attribute("options.rotationsnapsperpi", "value", 12);
1144 if (snaps) {
1145 double sections = floor( radians * snaps / M_PI + .5 );
1146 if (fabs(sections) >= snaps / 2) sections = sign(sections) * (snaps / 2 - 1);
1147 radians = ( M_PI / snaps ) * sections;
1148 }
1149 skew[dim_a] = tan(radians) * s[dim_a];
1150 } else {
1151 /* Get a STL list of the selected items.
1152 ** FIXME: this should probably be done by Inkscape::Selection.
1153 */
1154 std::list<SPItem const*> it;
1155 for (GSList const *i = _selection->itemList(); i != NULL; i = i->next) {
1156 it.push_back(reinterpret_cast<SPItem*>(i->data));
1157 }
1159 SnapManager const &m = _desktop->namedview->snap_manager;
1161 std::pair<NR::Coord, bool> bb = m.freeSnapSkew(Inkscape::Snapper::SNAPPOINT_BBOX,
1162 _bbox_points,
1163 it,
1164 skew[dim_a],
1165 _origin_for_bboxpoints,
1166 dim_b);
1168 std::pair<NR::Coord, bool> sn = m.freeSnapSkew(Inkscape::Snapper::SNAPPOINT_NODE,
1169 _snap_points,
1170 it,
1171 skew[dim_a],
1172 _origin_for_specpoints,
1173 dim_b);
1175 if (bb.second || sn.second) {
1176 /* We snapped something, so change the skew to reflect it */
1177 NR::Coord const bd = bb.second ? bb.first : NR_HUGE;
1178 NR::Coord const sd = sn.second ? sn.first : NR_HUGE;
1179 skew[dim_a] = std::min(bd, sd);
1180 }
1181 }
1183 pt[dim_b] = ( _point[dim_a] - _origin[dim_a] ) * skew[dim_a] + _point[dim_b];
1184 pt[dim_a] = ( _point[dim_a] - _origin[dim_a] ) * s[dim_a] + _origin[dim_a];
1186 /* status text */
1187 double degrees = 180 / M_PI * radians;
1188 if (degrees > 180) degrees -= 360;
1189 if (degrees < -180) degrees += 360;
1191 _message_context.setF(Inkscape::NORMAL_MESSAGE,
1192 // TRANSLATORS: don't modify the first ";"
1193 // (it will NOT be displayed as ";" - only the second one will be)
1194 _("<b>Skew</b>: %0.2f°; with <b>Ctrl</b> to snap angle"),
1195 degrees);
1197 return TRUE;
1198 }
1200 gboolean Inkscape::SelTrans::rotateRequest(NR::Point &pt, guint state)
1201 {
1202 int snaps = prefs_get_int_attribute("options.rotationsnapsperpi", "value", 12);
1204 // rotate affine in rotate
1205 NR::Point const d1 = _point - _origin;
1206 NR::Point const d2 = pt - _origin;
1208 NR::Coord const h1 = NR::L2(d1);
1209 if (h1 < 1e-15) return FALSE;
1210 NR::Point q1 = d1 / h1;
1211 NR::Coord const h2 = NR::L2(d2);
1212 if (fabs(h2) < 1e-15) return FALSE;
1213 NR::Point q2 = d2 / h2;
1215 double radians;
1216 if (state & GDK_CONTROL_MASK) {
1217 /* Have to restrict movement. */
1218 double cos_t = NR::dot(q1, q2);
1219 double sin_t = NR::dot(NR::rot90(q1), q2);
1220 radians = atan2(sin_t, cos_t);
1221 if (snaps) {
1222 radians = ( M_PI / snaps ) * floor( radians * snaps / M_PI + .5 );
1223 }
1224 q1 = NR::Point(1, 0);
1225 q2 = NR::Point(cos(radians), sin(radians));
1226 } else {
1227 radians = atan2(NR::dot(NR::rot90(d1), d2),
1228 NR::dot(d1, d2));
1229 }
1231 NR::rotate const r1(q1);
1232 NR::rotate const r2(q2);
1233 pt = _point * NR::translate(-_origin) * ( r2 / r1 ) * NR::translate(_origin);
1235 /* status text */
1236 double degrees = 180 / M_PI * radians;
1237 if (degrees > 180) degrees -= 360;
1238 if (degrees < -180) degrees += 360;
1240 _message_context.setF(Inkscape::NORMAL_MESSAGE,
1241 // TRANSLATORS: don't modify the first ";"
1242 // (it will NOT be displayed as ";" - only the second one will be)
1243 _("<b>Rotate</b>: %0.2f°; with <b>Ctrl</b> to snap angle"), degrees);
1245 return TRUE;
1246 }
1248 gboolean Inkscape::SelTrans::centerRequest(NR::Point &pt, guint state)
1249 {
1250 using NR::X;
1251 using NR::Y;
1253 SnapManager const &m = _desktop->namedview->snap_manager;
1254 pt = m.freeSnap(Snapper::SNAPPOINT_NODE, pt, NULL).getPoint();
1256 if (state & GDK_CONTROL_MASK) {
1257 if ( fabs(_point[X] - pt[X]) > fabs(_point[Y] - pt[Y]) ) {
1258 pt[Y] = _point[Y];
1259 } else {
1260 pt[X] = _point[X];
1261 }
1262 }
1264 if ( !(state & GDK_SHIFT_MASK) && _bbox ) {
1265 // screen pixels to snap center to bbox
1266 #define SNAP_DIST 5
1267 // FIXME: take from prefs
1268 double snap_dist = SNAP_DIST / _desktop->current_zoom();
1270 for (int i = 0; i < 2; i++) {
1271 if (fabs(pt[i] - _bbox->min()[i]) < snap_dist) {
1272 pt[i] = _bbox->min()[i];
1273 }
1274 if (fabs(pt[i] - _bbox->midpoint()[i]) < snap_dist) {
1275 pt[i] = _bbox->midpoint()[i];
1276 }
1277 if (fabs(pt[i] - _bbox->max()[i]) < snap_dist) {
1278 pt[i] = _bbox->max()[i];
1279 }
1280 }
1281 }
1283 // status text
1284 GString *xs = SP_PX_TO_METRIC_STRING(pt[X], _desktop->namedview->getDefaultMetric());
1285 GString *ys = SP_PX_TO_METRIC_STRING(pt[Y], _desktop->namedview->getDefaultMetric());
1286 _message_context.setF(Inkscape::NORMAL_MESSAGE, _("Move <b>center</b> to %s, %s"), xs->str, ys->str);
1287 g_string_free(xs, FALSE);
1288 g_string_free(ys, FALSE);
1290 return TRUE;
1291 }
1293 /*
1294 * handlers for handle movement
1295 *
1296 */
1298 void sp_sel_trans_stretch(Inkscape::SelTrans *seltrans, SPSelTransHandle const &handle, NR::Point &pt, guint state)
1299 {
1300 seltrans->stretch(handle, pt, state);
1301 }
1303 void sp_sel_trans_scale(Inkscape::SelTrans *seltrans, SPSelTransHandle const &, NR::Point &pt, guint state)
1304 {
1305 seltrans->scale(pt, state);
1306 }
1308 void sp_sel_trans_skew(Inkscape::SelTrans *seltrans, SPSelTransHandle const &handle, NR::Point &pt, guint state)
1309 {
1310 seltrans->skew(handle, pt, state);
1311 }
1313 void sp_sel_trans_rotate(Inkscape::SelTrans *seltrans, SPSelTransHandle const &, NR::Point &pt, guint state)
1314 {
1315 seltrans->rotate(pt, state);
1316 }
1318 void Inkscape::SelTrans::stretch(SPSelTransHandle const &handle, NR::Point &pt, guint state)
1319 {
1320 using NR::X;
1321 using NR::Y;
1323 NR::Dim2 dim;
1324 switch (handle.cursor) {
1325 case GDK_LEFT_SIDE:
1326 case GDK_RIGHT_SIDE:
1327 dim = X;
1328 break;
1329 case GDK_TOP_SIDE:
1330 case GDK_BOTTOM_SIDE:
1331 dim = Y;
1332 break;
1333 default:
1334 g_assert_not_reached();
1335 abort();
1336 break;
1337 }
1339 NR::Point const scale_origin(_origin);
1340 double const offset = _point[dim] - scale_origin[dim];
1341 if (!( fabs(offset) >= 1e-15 )) {
1342 return;
1343 }
1344 NR::scale s(1, 1);
1345 s[dim] = ( pt[dim] - scale_origin[dim] ) / offset;
1346 if (isNaN(s[dim])) {
1347 g_warning("s[dim]=%g, pt[dim]=%g, scale_origin[dim]=%g, point[dim]=%g\n",
1348 s[dim], pt[dim], scale_origin[dim], _point[dim]);
1349 }
1350 if (!( fabs(s[dim]) >= 1e-15 )) {
1351 s[dim] = 1e-15;
1352 }
1353 if (state & GDK_CONTROL_MASK) {
1354 /* Preserve aspect ratio, but never flip in the dimension not being edited. */
1355 s[!dim] = fabs(s[dim]);
1356 }
1358 if (!_bbox) {
1359 return;
1360 }
1362 NR::Point new_bbox_min = _approximate_bbox->min() * (NR::translate(-scale_origin) * NR::Matrix(s) * NR::translate(scale_origin));
1363 NR::Point new_bbox_max = _approximate_bbox->max() * (NR::translate(-scale_origin) * NR::Matrix(s) * NR::translate(scale_origin));
1365 int transform_stroke = false;
1366 gdouble strokewidth = 0;
1368 if ( _snap_bbox_type != SPItem::GEOMETRIC_BBOX) {
1369 transform_stroke = prefs_get_int_attribute ("options.transform", "stroke", 1);
1370 strokewidth = _strokewidth;
1371 }
1373 NR::Matrix scaler = get_scale_transform_with_stroke (*_approximate_bbox, strokewidth, transform_stroke,
1374 new_bbox_min[NR::X], new_bbox_min[NR::Y], new_bbox_max[NR::X], new_bbox_max[NR::Y]);
1376 transform(scaler, NR::Point(0, 0)); // we have already accounted for origin, so pass 0,0
1377 }
1379 void Inkscape::SelTrans::scale(NR::Point &pt, guint /*state*/)
1380 {
1381 if (!_bbox) {
1382 return;
1383 }
1385 NR::Point const offset = _point - _origin;
1387 NR::scale s (1, 1);
1388 for (int i = NR::X; i <= NR::Y; i++) {
1389 if (fabs(offset[i]) > 1e-9)
1390 s[i] = (pt[i] - _origin[i]) / offset[i];
1391 if (fabs(s[i]) < 1e-9)
1392 s[i] = 1e-9;
1393 }
1395 NR::Point new_bbox_min = _approximate_bbox->min() * (NR::translate(-_origin) * NR::Matrix(s) * NR::translate(_origin));
1396 NR::Point new_bbox_max = _approximate_bbox->max() * (NR::translate(-_origin) * NR::Matrix(s) * NR::translate(_origin));
1398 int transform_stroke = false;
1399 gdouble strokewidth = 0;
1401 if ( _snap_bbox_type != SPItem::GEOMETRIC_BBOX) {
1402 transform_stroke = prefs_get_int_attribute ("options.transform", "stroke", 1);
1403 strokewidth = _strokewidth;
1404 }
1406 NR::Matrix scaler = get_scale_transform_with_stroke (*_approximate_bbox, strokewidth, transform_stroke,
1407 new_bbox_min[NR::X], new_bbox_min[NR::Y], new_bbox_max[NR::X], new_bbox_max[NR::Y]);
1409 transform(scaler, NR::Point(0, 0)); // we have already accounted for origin, so pass 0,0
1410 }
1412 void Inkscape::SelTrans::skew(SPSelTransHandle const &handle, NR::Point &pt, guint /*state*/)
1413 {
1414 NR::Point const offset = _point - _origin;
1416 unsigned dim;
1417 switch (handle.cursor) {
1418 case GDK_SB_H_DOUBLE_ARROW:
1419 dim = NR::Y;
1420 break;
1421 case GDK_SB_V_DOUBLE_ARROW:
1422 dim = NR::X;
1423 break;
1424 default:
1425 g_assert_not_reached();
1426 abort();
1427 break;
1428 }
1429 if (fabs(offset[dim]) < 1e-15) {
1430 return;
1431 }
1432 NR::Matrix skew = NR::identity();
1433 skew[2*dim + dim] = (pt[dim] - _origin[dim]) / offset[dim];
1434 skew[2*dim + (1-dim)] = (pt[1-dim] - _point[1-dim]) / offset[dim];
1435 skew[2*(1-dim) + (dim)] = 0;
1436 skew[2*(1-dim) + (1-dim)] = 1;
1438 for (int i = 0; i < 2; i++) {
1439 if (fabs(skew[3*i]) < 1e-15) {
1440 skew[3*i] = 1e-15;
1441 }
1442 }
1443 transform(skew, _origin);
1444 }
1446 void Inkscape::SelTrans::rotate(NR::Point &pt, guint /*state*/)
1447 {
1448 NR::Point const offset = _point - _origin;
1450 NR::Coord const h1 = NR::L2(offset);
1451 if (h1 < 1e-15) {
1452 return;
1453 }
1454 NR::Point const q1 = offset / h1;
1455 NR::Coord const h2 = NR::L2( pt - _origin );
1456 if (h2 < 1e-15) {
1457 return;
1458 }
1459 NR::Point const q2 = (pt - _origin) / h2;
1460 NR::rotate const r1(q1);
1461 NR::rotate const r2(q2);
1463 NR::Matrix rotate( r2 / r1 );
1464 transform(rotate, _origin);
1465 }
1467 void sp_sel_trans_center(Inkscape::SelTrans *seltrans, SPSelTransHandle const &, NR::Point &pt, guint /*state*/)
1468 {
1469 seltrans->setCenter(pt);
1470 }
1473 void Inkscape::SelTrans::moveTo(NR::Point const &xy, guint state)
1474 {
1475 SnapManager const &m = _desktop->namedview->snap_manager;
1477 /* The amount that we've moved by during this drag */
1478 NR::Point dxy = xy - _point;
1480 /* Get a STL list of the selected items.
1481 ** FIXME: this should probably be done by Inkscape::Selection.
1482 */
1483 std::list<SPItem const*> it;
1484 for (GSList const *i = _selection->itemList(); i != NULL; i = i->next) {
1485 it.push_back(reinterpret_cast<SPItem*>(i->data));
1486 }
1488 bool const alt = (state & GDK_MOD1_MASK);
1489 bool const control = (state & GDK_CONTROL_MASK);
1490 bool const shift = (state & GDK_SHIFT_MASK);
1492 if (alt) {
1494 /* Alt pressed means keep offset: snap the moved distance to the grid.
1495 ** FIXME: this will snap to more than just the grid, nowadays.
1496 */
1498 dxy = m.freeSnap(Snapper::SNAPPOINT_NODE, dxy, NULL).getPoint();
1500 } else if (!shift) {
1502 /* We're snapping to things, possibly with a constraint to horizontal or
1503 ** vertical movement. Obtain a list of possible translations and then
1504 ** pick the smallest.
1505 */
1507 /* This will be our list of possible translations */
1508 std::list<std::pair<NR::Point, bool> > s;
1510 if (control) {
1512 /* Snap to things, and also constrain to horizontal or vertical movement */
1514 for (unsigned int dim = 0; dim < 2; dim++) {
1515 s.push_back(m.constrainedSnapTranslation(Inkscape::Snapper::SNAPPOINT_BBOX,
1516 _bbox_points,
1517 it,
1518 Inkscape::Snapper::ConstraintLine(component_vectors[dim]),
1519 dxy));
1521 s.push_back(m.constrainedSnapTranslation(Inkscape::Snapper::SNAPPOINT_NODE,
1522 _snap_points,
1523 it,
1524 Inkscape::Snapper::ConstraintLine(component_vectors[dim]),
1525 dxy));
1526 }
1528 } else {
1530 // Let's leave this timer code here for a while. I'll probably need it in the near future (Diederik van Lierop)
1531 /* GTimeVal starttime;
1532 GTimeVal endtime;
1533 g_get_current_time(&starttime); */
1535 /* Snap to things with no constraint */
1536 s.push_back(m.freeSnapTranslation(Inkscape::Snapper::SNAPPOINT_BBOX,
1537 _bbox_points, it, dxy));
1538 s.push_back(m.freeSnapTranslation(Inkscape::Snapper::SNAPPOINT_NODE,
1539 _snap_points, it, dxy));
1541 /*g_get_current_time(&endtime);
1542 double elapsed = ((((double)endtime.tv_sec - starttime.tv_sec) * G_USEC_PER_SEC + (endtime.tv_usec - starttime.tv_usec))) / 1000.0;
1543 std::cout << "Time spent snapping: " << elapsed << std::endl; */
1544 }
1546 /* Pick one */
1547 NR::Coord best = NR_HUGE;
1548 for (std::list<std::pair<NR::Point, bool> >::const_iterator i = s.begin(); i != s.end(); i++) {
1549 if (i->second) {
1550 NR::Coord const m = NR::L2(i->first);
1551 if (m < best) {
1552 best = m;
1553 dxy = i->first;
1554 }
1555 }
1556 }
1557 }
1559 if (control) {
1560 /* Ensure that the horizontal and vertical constraint has been applied */
1561 if (fabs(dxy[NR::X]) > fabs(dxy[NR::Y])) {
1562 dxy[NR::Y] = 0;
1563 } else {
1564 dxy[NR::X] = 0;
1565 }
1566 }
1568 NR::Matrix const move((NR::translate(dxy)));
1569 NR::Point const norm(0, 0);
1570 transform(move, norm);
1572 // status text
1573 GString *xs = SP_PX_TO_METRIC_STRING(dxy[NR::X], _desktop->namedview->getDefaultMetric());
1574 GString *ys = SP_PX_TO_METRIC_STRING(dxy[NR::Y], _desktop->namedview->getDefaultMetric());
1575 _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);
1576 g_string_free(xs, TRUE);
1577 g_string_free(ys, TRUE);
1578 }
1581 /*
1582 Local Variables:
1583 mode:c++
1584 c-file-style:"stroustrup"
1585 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
1586 indent-tabs-mode:nil
1587 fill-column:99
1588 End:
1589 */
1590 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4 :