1 #define __SELTRANS_C__
3 /*
4 * Helper object for transforming selected items
5 *
6 * Authors:
7 * Lauris Kaplinski <lauris@kaplinski.com>
8 * bulia byak <buliabyak@users.sf.net>
9 * Carl Hetherington <inkscape@carlh.net>
10 * Diederik van Lierop <mail@diedenrezi.nl>
11 *
12 * Copyright (C) 1999-2002 Lauris Kaplinski
13 * Copyright (C) 1999-2008 Authors
14 *
15 * Released under GNU GPL, read the file 'COPYING' for more information
16 */
18 #ifdef HAVE_CONFIG_H
19 # include <config.h>
20 #endif
21 #include <cstring>
22 #include <string>
24 #include <libnr/nr-matrix-ops.h>
25 #include <libnr/nr-matrix-translate-ops.h>
26 #include <libnr/nr-rotate-ops.h>
27 #include <libnr/nr-scale-ops.h>
28 #include <libnr/nr-translate-matrix-ops.h>
29 #include <libnr/nr-translate-ops.h>
30 #include <gdk/gdkkeysyms.h>
31 #include "document.h"
32 #include "sp-namedview.h"
33 #include "desktop.h"
34 #include "desktop-handles.h"
35 #include "desktop-style.h"
36 #include "knot.h"
37 #include "snap.h"
38 #include "selection.h"
39 #include "select-context.h"
40 #include "sp-item.h"
41 #include "sp-item-transform.h"
42 #include "seltrans-handles.h"
43 #include "seltrans.h"
44 #include "selection-chemistry.h"
45 #include "sp-metrics.h"
46 #include "verbs.h"
47 #include <glibmm/i18n.h>
48 #include "display/sp-ctrlline.h"
49 #include "prefs-utils.h"
50 #include "xml/repr.h"
51 #include "mod360.h"
52 #include "2geom/angle.h"
53 #include "display/snap-indicator.h"
56 static void sp_remove_handles(SPKnot *knot[], gint num);
58 static void sp_sel_trans_handle_grab(SPKnot *knot, guint state, gpointer data);
59 static void sp_sel_trans_handle_ungrab(SPKnot *knot, guint state, gpointer data);
60 static void sp_sel_trans_handle_click(SPKnot *knot, guint state, gpointer data);
61 static void sp_sel_trans_handle_new_event(SPKnot *knot, NR::Point *position, guint32 state, gpointer data);
62 static gboolean sp_sel_trans_handle_request(SPKnot *knot, NR::Point *p, guint state, gboolean *data);
64 extern GdkPixbuf *handles[];
66 static gboolean sp_seltrans_handle_event(SPKnot *knot, GdkEvent *event, gpointer)
67 {
68 switch (event->type) {
69 case GDK_MOTION_NOTIFY:
70 break;
71 case GDK_KEY_PRESS:
72 if (get_group0_keyval (&event->key) == GDK_space) {
73 /* stamping mode: both mode(show content and outline) operation with knot */
74 if (!SP_KNOT_IS_GRABBED(knot)) {
75 return FALSE;
76 }
77 SPDesktop *desktop = knot->desktop;
78 Inkscape::SelTrans *seltrans = SP_SELECT_CONTEXT(desktop->event_context)->_seltrans;
79 seltrans->stamp();
80 return TRUE;
81 }
82 break;
83 default:
84 break;
85 }
87 return FALSE;
88 }
90 Inkscape::SelTrans::SelTrans(SPDesktop *desktop) :
91 _desktop(desktop),
92 _selcue(desktop),
93 _state(STATE_SCALE),
94 _show(SHOW_CONTENT),
95 _grabbed(false),
96 _show_handles(true),
97 _bbox(),
98 _approximate_bbox(),
99 _absolute_affine(NR::scale(1,1)),
100 _opposite(NR::Point(0,0)),
101 _opposite_for_specpoints(NR::Point(0,0)),
102 _opposite_for_bboxpoints(NR::Point(0,0)),
103 _origin_for_specpoints(NR::Point(0,0)),
104 _origin_for_bboxpoints(NR::Point(0,0)),
105 _chandle(NULL),
106 _stamp_cache(NULL),
107 _message_context(desktop->messageStack())
108 {
109 int prefs_bbox = prefs_get_int_attribute("tools", "bounding_box", 0);
110 _snap_bbox_type = (prefs_bbox ==0)?
111 SPItem::APPROXIMATE_BBOX : SPItem::GEOMETRIC_BBOX;
113 g_return_if_fail(desktop != NULL);
115 for (int i = 0; i < 8; i++) {
116 _shandle[i] = NULL;
117 _rhandle[i] = NULL;
118 }
120 _updateVolatileState();
121 _current_relative_affine.set_identity();
123 _center_is_set = false; // reread _center from items, or set to bbox midpoint
125 _updateHandles();
127 _selection = sp_desktop_selection(desktop);
129 _norm = sp_canvas_item_new(sp_desktop_controls(desktop),
130 SP_TYPE_CTRL,
131 "anchor", GTK_ANCHOR_CENTER,
132 "mode", SP_CTRL_MODE_COLOR,
133 "shape", SP_CTRL_SHAPE_BITMAP,
134 "size", 13.0,
135 "filled", TRUE,
136 "fill_color", 0x00000000,
137 "stroked", TRUE,
138 "stroke_color", 0x000000a0,
139 "pixbuf", handles[12],
140 NULL);
142 _grip = sp_canvas_item_new(sp_desktop_controls(desktop),
143 SP_TYPE_CTRL,
144 "anchor", GTK_ANCHOR_CENTER,
145 "mode", SP_CTRL_MODE_XOR,
146 "shape", SP_CTRL_SHAPE_CROSS,
147 "size", 7.0,
148 "filled", TRUE,
149 "fill_color", 0xffffff7f,
150 "stroked", TRUE,
151 "stroke_color", 0xffffffff,
152 "pixbuf", handles[12],
153 NULL);
155 sp_canvas_item_hide(_grip);
156 sp_canvas_item_hide(_norm);
158 for (int i = 0; i < 4; i++) {
159 _l[i] = sp_canvas_item_new(sp_desktop_controls(desktop), SP_TYPE_CTRLLINE, NULL);
160 sp_canvas_item_hide(_l[i]);
161 }
163 _sel_changed_connection = _selection->connectChanged(
164 sigc::mem_fun(*this, &Inkscape::SelTrans::_selChanged)
165 );
167 _sel_modified_connection = _selection->connectModified(
168 sigc::mem_fun(*this, &Inkscape::SelTrans::_selModified)
169 );
170 }
172 Inkscape::SelTrans::~SelTrans()
173 {
174 _sel_changed_connection.disconnect();
175 _sel_modified_connection.disconnect();
177 for (unsigned int i = 0; i < 8; i++) {
178 if (_shandle[i]) {
179 g_object_unref(G_OBJECT(_shandle[i]));
180 _shandle[i] = NULL;
181 }
182 if (_rhandle[i]) {
183 g_object_unref(G_OBJECT(_rhandle[i]));
184 _rhandle[i] = NULL;
185 }
186 }
187 if (_chandle) {
188 g_object_unref(G_OBJECT(_chandle));
189 _chandle = NULL;
190 }
192 if (_norm) {
193 gtk_object_destroy(GTK_OBJECT(_norm));
194 _norm = NULL;
195 }
196 if (_grip) {
197 gtk_object_destroy(GTK_OBJECT(_grip));
198 _grip = NULL;
199 }
200 for (int i = 0; i < 4; i++) {
201 if (_l[i]) {
202 gtk_object_destroy(GTK_OBJECT(_l[i]));
203 _l[i] = NULL;
204 }
205 }
207 for (unsigned i = 0; i < _items.size(); i++) {
208 sp_object_unref(SP_OBJECT(_items[i]), NULL);
209 }
211 _items.clear();
212 _items_const.clear();
213 _items_affines.clear();
214 _items_centers.clear();
215 }
217 void Inkscape::SelTrans::resetState()
218 {
219 _state = STATE_SCALE;
220 }
222 void Inkscape::SelTrans::increaseState()
223 {
224 if (_state == STATE_SCALE) {
225 _state = STATE_ROTATE;
226 } else {
227 _state = STATE_SCALE;
228 }
230 _center_is_set = true; // no need to reread center
232 _updateHandles();
233 }
235 void Inkscape::SelTrans::setCenter(NR::Point const &p)
236 {
237 _center = p;
238 _center_is_set = true;
240 // Write the new center position into all selected items
241 for (GSList const *l = _desktop->selection->itemList(); l; l = l->next) {
242 SPItem *it = (SPItem*)SP_OBJECT(l->data);
243 it->setCenter(p);
244 // only set the value; updating repr and document_done will be done once, on ungrab
245 }
247 _updateHandles();
248 }
250 void Inkscape::SelTrans::grab(NR::Point const &p, gdouble x, gdouble y, bool show_handles)
251 {
252 Inkscape::Selection *selection = sp_desktop_selection(_desktop);
254 g_return_if_fail(!_grabbed);
256 _grabbed = true;
257 _show_handles = show_handles;
258 _updateVolatileState();
259 _current_relative_affine.set_identity();
261 _changed = false;
263 if (_empty) {
264 return;
265 }
267 for (GSList const *l = selection->itemList(); l; l = l->next) {
268 SPItem *it = (SPItem *)sp_object_ref(SP_OBJECT(l->data), NULL);
269 _items.push_back(it);
270 _items_const.push_back(it);
271 _items_affines.push_back(sp_item_i2d_affine(it));
272 _items_centers.push_back(it->getCenter()); // for content-dragging, we need to remember original centers
273 }
275 _handle_x = x;
276 _handle_y = y;
278 // The selector tool should snap the bbox, special snappoints, and path nodes
279 // (The special points are the handles, center, rotation axis, font baseline, ends of spiral, etc.)
281 // First, determine the bounding box for snapping ...
282 _bbox = selection->bounds(_snap_bbox_type);
283 _approximate_bbox = selection->bounds(SPItem::APPROXIMATE_BBOX); // Used for correctly scaling the strokewidth
284 _geometric_bbox = selection->bounds(SPItem::GEOMETRIC_BBOX);
285 _point = p;
286 if (_geometric_bbox) {
287 _point_geom = _geometric_bbox->min() + _geometric_bbox->dimensions() * NR::scale(x, y);
288 } else {
289 _point_geom = p;
290 }
292 // Next, get all points to consider for snapping
293 SnapManager const &m = _desktop->namedview->snap_manager;
294 _snap_points.clear();
295 to_2geom(selection->getSnapPoints(m.getIncludeItemCenter()), _snap_points);
296 std::vector<Geom::Point> snap_points_hull;
297 to_2geom(selection->getSnapPointsConvexHull(), snap_points_hull);
298 if (_snap_points.size() > 100) {
299 /* Snapping a huge number of nodes will take way too long, so limit the number of snappable nodes
300 An average user would rarely ever try to snap such a large number of nodes anyway, because
301 (s)he could hardly discern which node would be snapping */
302 _snap_points = snap_points_hull;
303 // Unfortunately, by now we will have lost the font-baseline snappoints :-(
304 }
306 // Find bbox hulling all special points, which excludes stroke width. Here we need to include the
307 // path nodes, for example because a rectangle which has been converted to a path doesn't have
308 // any other special points
309 NR::Rect snap_points_bbox;
310 if ( snap_points_hull.empty() == false ) {
311 std::vector<Geom::Point>::iterator i = snap_points_hull.begin();
312 snap_points_bbox = NR::Rect(*i, *i);
313 i++;
314 while (i != snap_points_hull.end()) {
315 snap_points_bbox.expandTo(*i);
316 i++;
317 }
318 }
320 _bbox_points.clear();
321 if (_bbox) {
322 // ... and add the bbox corners to _bbox_points
323 for ( unsigned i = 0 ; i < 4 ; i++ ) {
324 _bbox_points.push_back(to_2geom(_bbox->corner(i)));
325 }
326 // There are two separate "opposites" (i.e. opposite w.r.t. the handle being dragged):
327 // - one for snapping the boundingbox, which can be either visual or geometric
328 // - one for snapping the special points
329 // The "opposite" in case of a geometric boundingbox always coincides with the "opposite" for the special points
330 // These distinct "opposites" are needed in the snapmanager to avoid bugs such as #sf1540195 (in which
331 // a box is caught between two guides)
332 _opposite_for_bboxpoints = _bbox->min() + _bbox->dimensions() * NR::scale(1-x, 1-y);
333 _opposite_for_specpoints = snap_points_bbox.min() + snap_points_bbox.dimensions() * NR::scale(1-x, 1-y);
334 _opposite = _opposite_for_bboxpoints;
335 }
337 // The lines below are usefull for debugging any snapping issues, as they'll spit out all points that are considered for snapping
339 /*std::cout << "Number of snap points: " << _snap_points.size() << std::endl;
340 for (std::vector<NR::Point>::const_iterator i = _snap_points.begin(); i != _snap_points.end(); i++)
341 {
342 std::cout << " " << *i << std::endl;
343 }
345 std::cout << "Number of bbox points: " << _bbox_points.size() << std::endl;
346 for (std::vector<NR::Point>::const_iterator i = _bbox_points.begin(); i != _bbox_points.end(); i++)
347 {
348 std::cout << " " << *i << std::endl;
349 }*/
351 if ((x != -1) && (y != -1)) {
352 sp_canvas_item_show(_norm);
353 sp_canvas_item_show(_grip);
354 }
356 if (_show == SHOW_OUTLINE) {
357 for (int i = 0; i < 4; i++)
358 sp_canvas_item_show(_l[i]);
359 }
361 _updateHandles();
362 g_return_if_fail(_stamp_cache == NULL);
363 }
365 void Inkscape::SelTrans::transform(NR::Matrix const &rel_affine, NR::Point const &norm)
366 {
367 g_return_if_fail(_grabbed);
368 g_return_if_fail(!_empty);
370 NR::Matrix const affine( NR::translate(-norm) * rel_affine * NR::translate(norm) );
372 if (_show == SHOW_CONTENT) {
373 // update the content
374 for (unsigned i = 0; i < _items.size(); i++) {
375 SPItem &item = *_items[i];
376 NR::Matrix const &prev_transform = _items_affines[i];
377 sp_item_set_i2d_affine(&item, prev_transform * affine);
378 }
379 } else {
380 if (_bbox) {
381 NR::Point p[4];
382 /* update the outline */
383 for (unsigned i = 0 ; i < 4 ; i++) {
384 p[i] = _bbox->corner(i) * affine;
385 }
386 for (unsigned i = 0 ; i < 4 ; i++) {
387 sp_ctrlline_set_coords(SP_CTRLLINE(_l[i]), p[i], p[(i+1)%4]);
388 }
389 }
390 }
392 _current_relative_affine = affine;
393 _changed = true;
394 _updateHandles();
395 }
397 void Inkscape::SelTrans::ungrab()
398 {
399 g_return_if_fail(_grabbed);
400 _grabbed = false;
401 _show_handles = true;
403 Inkscape::Selection *selection = sp_desktop_selection(_desktop);
404 _updateVolatileState();
406 for (unsigned i = 0; i < _items.size(); i++) {
407 sp_object_unref(SP_OBJECT(_items[i]), NULL);
408 }
410 sp_canvas_item_hide(_norm);
411 sp_canvas_item_hide(_grip);
413 if (_show == SHOW_OUTLINE) {
414 for (int i = 0; i < 4; i++)
415 sp_canvas_item_hide(_l[i]);
416 }
418 if (_stamp_cache) {
419 g_slist_free(_stamp_cache);
420 _stamp_cache = NULL;
421 }
423 _message_context.clear();
425 if (!_empty && _changed) {
426 sp_selection_apply_affine(selection, _current_relative_affine, (_show == SHOW_OUTLINE)? true : false);
427 if (_center) {
428 *_center *= _current_relative_affine;
429 _center_is_set = true;
430 }
432 // If dragging showed content live, sp_selection_apply_affine cannot change the centers
433 // appropriately - it does not know the original positions of the centers (all objects already have
434 // the new bboxes). So we need to reset the centers from our saved array.
435 if (_show != SHOW_OUTLINE && !_current_relative_affine.is_translation()) {
436 for (unsigned i = 0; i < _items_centers.size(); i++) {
437 SPItem *currentItem = _items[i];
438 if (currentItem->isCenterSet()) { // only if it's already set
439 currentItem->setCenter (_items_centers[i] * _current_relative_affine);
440 SP_OBJECT(currentItem)->updateRepr();
441 }
442 }
443 }
445 _items.clear();
446 _items_const.clear();
447 _items_affines.clear();
448 _items_centers.clear();
450 if (_current_relative_affine.is_translation()) {
451 sp_document_done(sp_desktop_document(_desktop), SP_VERB_CONTEXT_SELECT,
452 _("Move"));
453 } else if (_current_relative_affine.is_scale()) {
454 sp_document_done(sp_desktop_document(_desktop), SP_VERB_CONTEXT_SELECT,
455 _("Scale"));
456 } else if (_current_relative_affine.is_rotation()) {
457 sp_document_done(sp_desktop_document(_desktop), SP_VERB_CONTEXT_SELECT,
458 _("Rotate"));
459 } else {
460 sp_document_done(sp_desktop_document(_desktop), SP_VERB_CONTEXT_SELECT,
461 _("Skew"));
462 }
464 } else {
466 if (_center_is_set) {
467 // we were dragging center; update reprs and commit undoable action
468 for (GSList const *l = _desktop->selection->itemList(); l; l = l->next) {
469 SPItem *it = (SPItem*)SP_OBJECT(l->data);
470 SP_OBJECT(it)->updateRepr();
471 }
472 sp_document_done (sp_desktop_document(_desktop), SP_VERB_CONTEXT_SELECT,
473 _("Set center"));
474 }
476 _items.clear();
477 _items_const.clear();
478 _items_affines.clear();
479 _items_centers.clear();
480 _updateHandles();
481 }
482 }
484 /* fixme: This is really bad, as we compare positions for each stamp (Lauris) */
485 /* fixme: IMHO the best way to keep sort cache would be to implement timestamping at last */
487 void Inkscape::SelTrans::stamp()
488 {
489 Inkscape::Selection *selection = sp_desktop_selection(_desktop);
491 bool fixup = !_grabbed;
492 if ( fixup && _stamp_cache ) {
493 // TODO - give a proper fix. Simple temproary work-around for the grab() issue
494 g_slist_free(_stamp_cache);
495 _stamp_cache = NULL;
496 }
498 /* stamping mode */
499 if (!_empty) {
500 GSList *l;
501 if (_stamp_cache) {
502 l = _stamp_cache;
503 } else {
504 /* Build cache */
505 l = g_slist_copy((GSList *) selection->itemList());
506 l = g_slist_sort(l, (GCompareFunc) sp_object_compare_position);
507 _stamp_cache = l;
508 }
510 while (l) {
511 SPItem *original_item = SP_ITEM(l->data);
512 Inkscape::XML::Node *original_repr = SP_OBJECT_REPR(original_item);
514 // remember the position of the item
515 gint pos = original_repr->position();
516 // remember parent
517 Inkscape::XML::Node *parent = sp_repr_parent(original_repr);
519 Inkscape::XML::Node *copy_repr = original_repr->duplicate(parent->document());
521 // add the new repr to the parent
522 parent->appendChild(copy_repr);
523 // move to the saved position
524 copy_repr->setPosition(pos > 0 ? pos : 0);
526 SPItem *copy_item = (SPItem *) sp_desktop_document(_desktop)->getObjectByRepr(copy_repr);
528 NR::Matrix const *new_affine;
529 if (_show == SHOW_OUTLINE) {
530 NR::Matrix const i2d(sp_item_i2d_affine(original_item));
531 NR::Matrix const i2dnew( i2d * _current_relative_affine );
532 sp_item_set_i2d_affine(copy_item, i2dnew);
533 new_affine = ©_item->transform;
534 } else {
535 new_affine = &original_item->transform;
536 }
538 sp_item_write_transform(copy_item, copy_repr, *new_affine);
540 if ( copy_item->isCenterSet() && _center ) {
541 copy_item->setCenter(*_center * _current_relative_affine);
542 }
544 Inkscape::GC::release(copy_repr);
545 l = l->next;
546 }
547 sp_document_done(sp_desktop_document(_desktop), SP_VERB_CONTEXT_SELECT,
548 _("Stamp"));
549 }
551 if ( fixup && _stamp_cache ) {
552 // TODO - give a proper fix. Simple temproary work-around for the grab() issue
553 g_slist_free(_stamp_cache);
554 _stamp_cache = NULL;
555 }
556 }
558 void Inkscape::SelTrans::_updateHandles()
559 {
560 if ( !_show_handles || _empty )
561 {
562 sp_remove_handles(_shandle, 8);
563 sp_remove_handles(_rhandle, 8);
564 sp_remove_handles(&_chandle, 1);
565 return;
566 }
568 // center handle
569 if ( _chandle == NULL ) {
570 _chandle = sp_knot_new(_desktop, _("<b>Center</b> of rotation and skewing: drag to reposition; scaling with Shift also uses this center"));
572 _chandle->setShape (SP_CTRL_SHAPE_BITMAP);
573 _chandle->setSize (13);
574 _chandle->setAnchor (handle_center.anchor);
575 _chandle->setMode (SP_CTRL_MODE_XOR);
576 _chandle->setFill(0x00000000, 0x00000000, 0x00000000);
577 _chandle->setStroke(0x000000ff, 0xff0000b0, 0xff0000b0);
578 _chandle->setPixbuf(handles[handle_center.control]);
579 sp_knot_update_ctrl(_chandle);
581 g_signal_connect(G_OBJECT(_chandle), "request",
582 G_CALLBACK(sp_sel_trans_handle_request), (gpointer) &handle_center);
583 g_signal_connect(G_OBJECT(_chandle), "moved",
584 G_CALLBACK(sp_sel_trans_handle_new_event), (gpointer) &handle_center);
585 g_signal_connect(G_OBJECT(_chandle), "grabbed",
586 G_CALLBACK(sp_sel_trans_handle_grab), (gpointer) &handle_center);
587 g_signal_connect(G_OBJECT(_chandle), "ungrabbed",
588 G_CALLBACK(sp_sel_trans_handle_ungrab), (gpointer) &handle_center);
589 g_signal_connect(G_OBJECT(_chandle), "clicked",
590 G_CALLBACK(sp_sel_trans_handle_click), (gpointer) &handle_center);
591 }
593 sp_remove_handles(&_chandle, 1);
594 if ( _state == STATE_SCALE ) {
595 sp_remove_handles(_rhandle, 8);
596 _showHandles(_shandle, handles_scale, 8,
597 _("<b>Squeeze or stretch</b> selection; with <b>Ctrl</b> to scale uniformly; with <b>Shift</b> to scale around rotation center"),
598 _("<b>Scale</b> selection; with <b>Ctrl</b> to scale uniformly; with <b>Shift</b> to scale around rotation center"));
599 } else {
600 sp_remove_handles(_shandle, 8);
601 _showHandles(_rhandle, handles_rotate, 8,
602 _("<b>Skew</b> selection; with <b>Ctrl</b> to snap angle; with <b>Shift</b> to skew around the opposite side"),
603 _("<b>Rotate</b> selection; with <b>Ctrl</b> to snap angle; with <b>Shift</b> to rotate around the opposite corner"));
604 }
606 if (!_center_is_set) {
607 _center = _desktop->selection->center();
608 _center_is_set = true;
609 }
611 if ( _state == STATE_SCALE || !_center ) {
612 sp_knot_hide(_chandle);
613 } else {
614 sp_knot_show(_chandle);
615 sp_knot_moveto(_chandle, *_center);
616 }
617 }
619 void Inkscape::SelTrans::_updateVolatileState()
620 {
621 Inkscape::Selection *selection = sp_desktop_selection(_desktop);
622 _empty = selection->isEmpty();
624 if (_empty) {
625 return;
626 }
628 //Update the bboxes
629 _bbox = selection->bounds(_snap_bbox_type);
630 _approximate_bbox = selection->bounds(SPItem::APPROXIMATE_BBOX);
632 if (!_bbox) {
633 _empty = true;
634 return;
635 }
637 _strokewidth = stroke_average_width (selection->itemList());
638 }
640 static void sp_remove_handles(SPKnot *knot[], gint num)
641 {
642 for (int i = 0; i < num; i++) {
643 if (knot[i] != NULL) {
644 sp_knot_hide(knot[i]);
645 }
646 }
647 }
649 void Inkscape::SelTrans::_showHandles(SPKnot *knot[], SPSelTransHandle const handle[], gint num,
650 gchar const *even_tip, gchar const *odd_tip)
651 {
652 g_return_if_fail( !_empty );
654 for (int i = 0; i < num; i++) {
655 if (knot[i] == NULL) {
656 knot[i] = sp_knot_new(_desktop, i % 2 ? even_tip : odd_tip);
658 knot[i]->setShape (SP_CTRL_SHAPE_BITMAP);
659 knot[i]->setSize (13);
660 knot[i]->setAnchor (handle[i].anchor);
661 knot[i]->setMode (SP_CTRL_MODE_XOR);
662 knot[i]->setFill(0x000000ff, 0x00ff6600, 0x00ff6600); // inversion, green, green
663 knot[i]->setStroke(0x000000ff, 0x000000ff, 0x000000ff); // inversion
664 knot[i]->setPixbuf(handles[handle[i].control]);
665 sp_knot_update_ctrl(knot[i]);
667 g_signal_connect(G_OBJECT(knot[i]), "request",
668 G_CALLBACK(sp_sel_trans_handle_request), (gpointer) &handle[i]);
669 g_signal_connect(G_OBJECT(knot[i]), "moved",
670 G_CALLBACK(sp_sel_trans_handle_new_event), (gpointer) &handle[i]);
671 g_signal_connect(G_OBJECT(knot[i]), "grabbed",
672 G_CALLBACK(sp_sel_trans_handle_grab), (gpointer) &handle[i]);
673 g_signal_connect(G_OBJECT(knot[i]), "ungrabbed",
674 G_CALLBACK(sp_sel_trans_handle_ungrab), (gpointer) &handle[i]);
675 g_signal_connect(G_OBJECT(knot[i]), "event", G_CALLBACK(sp_seltrans_handle_event), (gpointer) &handle[i]);
676 }
677 sp_knot_show(knot[i]);
679 NR::Point const handle_pt(handle[i].x, handle[i].y);
680 // shouldn't have nullary bbox, but knots
681 g_assert(_bbox);
682 NR::Point p( _bbox->min()
683 + ( _bbox->dimensions()
684 * NR::scale(handle_pt) ) );
686 sp_knot_moveto(knot[i], p);
687 }
688 }
690 static void sp_sel_trans_handle_grab(SPKnot *knot, guint state, gpointer data)
691 {
692 SP_SELECT_CONTEXT(knot->desktop->event_context)->_seltrans->handleGrab(
693 knot, state, *(SPSelTransHandle const *) data
694 );
695 }
697 static void sp_sel_trans_handle_ungrab(SPKnot *knot, guint /*state*/, gpointer /*data*/)
698 {
699 SP_SELECT_CONTEXT(knot->desktop->event_context)->_seltrans->ungrab();
700 }
702 static void sp_sel_trans_handle_new_event(SPKnot *knot, NR::Point *position, guint state, gpointer data)
703 {
704 SP_SELECT_CONTEXT(knot->desktop->event_context)->_seltrans->handleNewEvent(
705 knot, position, state, *(SPSelTransHandle const *) data
706 );
707 }
709 static gboolean sp_sel_trans_handle_request(SPKnot *knot, NR::Point *position, guint state, gboolean *data)
710 {
711 return SP_SELECT_CONTEXT(knot->desktop->event_context)->_seltrans->handleRequest(
712 knot, position, state, *(SPSelTransHandle const *) data
713 );
714 }
716 static void sp_sel_trans_handle_click(SPKnot *knot, guint state, gpointer data)
717 {
718 SP_SELECT_CONTEXT(knot->desktop->event_context)->_seltrans->handleClick(
719 knot, state, *(SPSelTransHandle const *) data
720 );
721 }
723 void Inkscape::SelTrans::handleClick(SPKnot */*knot*/, guint state, SPSelTransHandle const &handle)
724 {
725 switch (handle.anchor) {
726 case GTK_ANCHOR_CENTER:
727 if (state & GDK_SHIFT_MASK) {
728 // Unset the center position for all selected items
729 for (GSList const *l = _desktop->selection->itemList(); l; l = l->next) {
730 SPItem *it = (SPItem*)(SP_OBJECT(l->data));
731 it->unsetCenter();
732 SP_OBJECT(it)->updateRepr();
733 _center_is_set = false; // center has changed
734 _updateHandles();
735 }
736 sp_document_done (sp_desktop_document(_desktop), SP_VERB_CONTEXT_SELECT,
737 _("Reset center"));
738 }
739 break;
740 default:
741 break;
742 }
743 }
745 void Inkscape::SelTrans::handleGrab(SPKnot *knot, guint /*state*/, SPSelTransHandle const &handle)
746 {
747 switch (handle.anchor) {
748 case GTK_ANCHOR_CENTER:
749 g_object_set(G_OBJECT(_grip),
750 "shape", SP_CTRL_SHAPE_BITMAP,
751 "size", 13.0,
752 NULL);
753 sp_canvas_item_show(_grip);
754 break;
755 default:
756 g_object_set(G_OBJECT(_grip),
757 "shape", SP_CTRL_SHAPE_CROSS,
758 "size", 7.0,
759 NULL);
760 sp_canvas_item_show(_norm);
761 sp_canvas_item_show(_grip);
763 break;
764 }
766 grab(sp_knot_position(knot), handle.x, handle.y, FALSE);
767 }
770 void Inkscape::SelTrans::handleNewEvent(SPKnot *knot, NR::Point *position, guint state, SPSelTransHandle const &handle)
771 {
772 if (!SP_KNOT_IS_GRABBED(knot)) {
773 return;
774 }
776 // in case items have been unhooked from the document, don't
777 // try to continue processing events for them.
778 for (unsigned int i = 0; i < _items.size(); i++) {
779 if (!SP_OBJECT_DOCUMENT(SP_OBJECT(_items[i])) ) {
780 return;
781 }
782 }
784 handle.action(this, handle, *position, state);
785 }
788 gboolean Inkscape::SelTrans::handleRequest(SPKnot *knot, NR::Point *position, guint state, SPSelTransHandle const &handle)
789 {
790 if (!SP_KNOT_IS_GRABBED(knot)) {
791 return TRUE;
792 }
794 knot->desktop->setPosition(*position);
796 // When holding shift while rotating or skewing, the transformation will be
797 // relative to the point opposite of the handle; otherwise it will be relative
798 // to the center as set for the selection
799 if ((!(state & GDK_SHIFT_MASK) == !(_state == STATE_ROTATE)) && (&handle != &handle_center)) {
800 _origin = _opposite;
801 _origin_for_bboxpoints = _opposite_for_bboxpoints;
802 _origin_for_specpoints = _opposite_for_specpoints;
803 } else if (_center) {
804 _origin = *_center;
805 _origin_for_bboxpoints = *_center;
806 _origin_for_specpoints = *_center;
807 } else {
808 // FIXME
809 return TRUE;
810 }
811 if (handle.request(this, handle, *position, state)) {
812 sp_knot_set_position(knot, *position, state);
813 SP_CTRL(_grip)->moveto(*position);
814 SP_CTRL(_norm)->moveto(_origin);
815 }
817 return TRUE;
818 }
821 void Inkscape::SelTrans::_selChanged(Inkscape::Selection */*selection*/)
822 {
823 if (!_grabbed) {
824 // reread in case it changed on the fly:
825 int prefs_bbox = prefs_get_int_attribute("tools", "bounding_box", 0);
826 _snap_bbox_type = (prefs_bbox ==0)?
827 SPItem::APPROXIMATE_BBOX : SPItem::GEOMETRIC_BBOX;
828 //SPItem::APPROXIMATE_BBOX will be replaced by SPItem::VISUAL_BBOX, as soon as the latter is implemented properly
830 _updateVolatileState();
831 _current_relative_affine.set_identity();
832 _center_is_set = false; // center(s) may have changed
833 _updateHandles();
834 }
835 }
837 void Inkscape::SelTrans::_selModified(Inkscape::Selection */*selection*/, guint /*flags*/)
838 {
839 if (!_grabbed) {
840 _updateVolatileState();
841 _current_relative_affine.set_identity();
843 // reset internal flag
844 _changed = false;
846 _center_is_set = false; // center(s) may have changed
848 _updateHandles();
849 }
850 }
852 /*
853 * handlers for handle move-request
854 */
856 /** Returns -1 or 1 according to the sign of x. Returns 1 for 0 and NaN. */
857 static double sign(double const x)
858 {
859 return ( x < 0
860 ? -1
861 : 1 );
862 }
864 gboolean sp_sel_trans_scale_request(Inkscape::SelTrans *seltrans,
865 SPSelTransHandle const &, NR::Point &pt, guint state)
866 {
867 return seltrans->scaleRequest(pt, state);
868 }
870 gboolean sp_sel_trans_stretch_request(Inkscape::SelTrans *seltrans,
871 SPSelTransHandle const &handle, NR::Point &pt, guint state)
872 {
873 return seltrans->stretchRequest(handle, pt, state);
874 }
876 gboolean sp_sel_trans_skew_request(Inkscape::SelTrans *seltrans,
877 SPSelTransHandle const &handle, NR::Point &pt, guint state)
878 {
879 return seltrans->skewRequest(handle, pt, state);
880 }
882 gboolean sp_sel_trans_rotate_request(Inkscape::SelTrans *seltrans,
883 SPSelTransHandle const &, NR::Point &pt, guint state)
884 {
885 return seltrans->rotateRequest(pt, state);
886 }
888 gboolean sp_sel_trans_center_request(Inkscape::SelTrans *seltrans,
889 SPSelTransHandle const &, NR::Point &pt, guint state)
890 {
891 return seltrans->centerRequest(pt, state);
892 }
894 gboolean Inkscape::SelTrans::scaleRequest(NR::Point &pt, guint state)
895 {
897 // Calculate the scale factors, which can be either visual or geometric
898 // depending on which type of bbox is currently being used (see preferences -> selector tool)
899 NR::scale default_scale = calcScaleFactors(_point, pt, _origin);
901 // Find the scale factors for the geometric bbox
902 NR::Point pt_geom = _getGeomHandlePos(pt);
903 NR::scale geom_scale = calcScaleFactors(_point_geom, pt_geom, _origin_for_specpoints);
905 _absolute_affine = NR::identity(); //Initialize the scaler
907 if (state & GDK_MOD1_MASK) { // scale by an integer multiplier/divider
908 // We're scaling either the visual or the geometric bbox here (see the comment above)
909 for ( unsigned int i = 0 ; i < 2 ; i++ ) {
910 if (fabs(default_scale[i]) > 1) {
911 default_scale[i] = round(default_scale[i]);
912 } else if (default_scale[i] != 0) {
913 default_scale[i] = 1/round(1/(MIN(default_scale[i], 10)));
914 }
915 }
916 // Update the knot position
917 pt = _calcAbsAffineDefault(default_scale);
918 // When scaling by an integer, snapping is not needed
919 } else {
920 // In all other cases we should try to snap now
921 SnapManager &m = _desktop->namedview->snap_manager;
922 m.setup(_desktop, false, _items_const);
924 Inkscape::SnappedPoint bb, sn;
925 NR::Coord bd(NR_HUGE);
926 NR::Coord sd(NR_HUGE);
928 if ((state & GDK_CONTROL_MASK) || _desktop->isToolboxButtonActive ("lock")) {
929 // Scale is locked to a 1:1 aspect ratio, so that s[X] must be made to equal s[Y].
930 //
931 // The aspect-ratio must be locked before snapping
932 if (fabs(default_scale[NR::X]) > fabs(default_scale[NR::Y])) {
933 default_scale[NR::X] = fabs(default_scale[NR::Y]) * sign(default_scale[NR::X]);
934 geom_scale[NR::X] = fabs(geom_scale[NR::Y]) * sign(geom_scale[NR::X]);
935 } else {
936 default_scale[NR::Y] = fabs(default_scale[NR::X]) * sign(default_scale[NR::Y]);
937 geom_scale[NR::Y] = fabs(geom_scale[NR::X]) * sign(geom_scale[NR::Y]);
938 }
940 // Snap along a suitable constraint vector from the origin.
941 Geom::Scale default_scale_2geom = to_2geom(default_scale);
942 Geom::Scale geom_scale_2geom = to_2geom(geom_scale);
943 bb = m.constrainedSnapScale(Snapper::SNAPPOINT_BBOX, _bbox_points, default_scale_2geom, to_2geom(_origin_for_bboxpoints));
944 sn = m.constrainedSnapScale(Snapper::SNAPPOINT_NODE, _snap_points, geom_scale_2geom, to_2geom(_origin_for_specpoints));
946 /* Choose the smaller difference in scale. Since s[X] == s[Y] we can
947 ** just compare difference in s[X].
948 */
949 bd = bb.getSnapped() ? fabs(bb.getTransformation()[NR::X] - default_scale_2geom[Geom::X]) : NR_HUGE;
950 sd = sn.getSnapped() ? fabs(sn.getTransformation()[NR::X] - geom_scale_2geom[Geom::X]) : NR_HUGE;
951 } else {
952 /* Scale aspect ratio is unlocked */
953 Geom::Scale default_scale_2geom = to_2geom(default_scale);
954 Geom::Scale geom_scale_2geom = to_2geom(geom_scale);
955 bb = m.freeSnapScale(Snapper::SNAPPOINT_BBOX, _bbox_points, default_scale_2geom, to_2geom(_origin_for_bboxpoints));
956 sn = m.freeSnapScale(Snapper::SNAPPOINT_NODE, _snap_points, geom_scale_2geom, to_2geom(_origin_for_specpoints));
958 /* Pick the snap that puts us closest to the original scale */
959 bd = bb.getSnapped() ? fabs(NR::L2(bb.getTransformation()) - NR::L2(NR::Point(default_scale_2geom[Geom::X], default_scale_2geom[Geom::Y]))) : NR_HUGE;
960 sd = sn.getSnapped() ? fabs(NR::L2(sn.getTransformation()) - NR::L2(NR::Point(geom_scale_2geom[Geom::X], geom_scale_2geom[Geom::Y]))) : NR_HUGE;
961 }
963 if (!(bb.getSnapped() || sn.getSnapped())) {
964 // We didn't snap at all! Don't update the handle position, just calculate the new transformation
965 _calcAbsAffineDefault(default_scale);
966 _desktop->snapindicator->remove_snappoint();
967 } else if (bd < sd) {
968 // We snapped the bbox (which is either visual or geometric)
969 _desktop->snapindicator->set_new_snappoint(bb);
970 default_scale = NR::scale(bb.getTransformation());
971 // Calculate the new transformation and update the handle position
972 pt = _calcAbsAffineDefault(default_scale);
973 } else {
974 _desktop->snapindicator->set_new_snappoint(sn);
975 // We snapped the special points (e.g. nodes), which are not at the visual bbox
976 // The handle location however (pt) might however be at the visual bbox, so we
977 // will have to calculate pt taking the stroke width into account
978 geom_scale = NR::scale(sn.getTransformation());
979 pt = _calcAbsAffineGeom(geom_scale);
980 }
981 }
983 /* Status text */
984 _message_context.setF(Inkscape::IMMEDIATE_MESSAGE,
985 _("<b>Scale</b>: %0.2f%% x %0.2f%%; with <b>Ctrl</b> to lock ratio"),
986 100 * _absolute_affine[0], 100 * _absolute_affine[3]);
988 return TRUE;
989 }
991 gboolean Inkscape::SelTrans::stretchRequest(SPSelTransHandle const &handle, NR::Point &pt, guint state)
992 {
993 NR::Dim2 axis, perp;
994 switch (handle.cursor) {
995 case GDK_TOP_SIDE:
996 case GDK_BOTTOM_SIDE:
997 axis = NR::Y;
998 perp = NR::X;
999 break;
1000 case GDK_LEFT_SIDE:
1001 case GDK_RIGHT_SIDE:
1002 axis = NR::X;
1003 perp = NR::Y;
1004 break;
1005 default:
1006 g_assert_not_reached();
1007 return TRUE;
1008 };
1010 // Calculate the scale factors, which can be either visual or geometric
1011 // depending on which type of bbox is currently being used (see preferences -> selector tool)
1012 NR::scale default_scale = calcScaleFactors(_point, pt, _origin);
1013 default_scale[perp] = 1;
1015 // Find the scale factors for the geometric bbox
1016 NR::Point pt_geom = _getGeomHandlePos(pt);
1017 NR::scale geom_scale = calcScaleFactors(_point_geom, pt_geom, _origin_for_specpoints);
1018 geom_scale[perp] = 1;
1020 _absolute_affine = NR::identity(); //Initialize the scaler
1022 if (state & GDK_MOD1_MASK) { // stretch by an integer multiplier/divider
1023 if (fabs(default_scale[axis]) > 1) {
1024 default_scale[axis] = round(default_scale[axis]);
1025 } else if (default_scale[axis] != 0) {
1026 default_scale[axis] = 1/round(1/(MIN(default_scale[axis], 10)));
1027 }
1028 // Calculate the new transformation and update the handle position
1029 pt = _calcAbsAffineDefault(default_scale);
1030 // When stretching by an integer, snapping is not needed
1031 } else {
1032 // In all other cases we should try to snap now
1034 SnapManager &m = _desktop->namedview->snap_manager;
1035 m.setup(_desktop, false, _items_const);
1037 Inkscape::SnappedPoint bb, sn;
1038 g_assert(bb.getSnapped() == false); // Check initialization to catch any regression
1039 NR::Coord bd(NR_HUGE);
1040 NR::Coord sd(NR_HUGE);
1042 bool symmetrical = state & GDK_CONTROL_MASK;
1044 Geom::Scale default_scale_2geom = to_2geom(default_scale);
1045 Geom::Scale geom_scale_2geom = to_2geom(geom_scale);
1047 bb = m.constrainedSnapStretch(Snapper::SNAPPOINT_BBOX, _bbox_points, Geom::Coord(default_scale_2geom[axis]), to_2geom(_origin_for_bboxpoints), Geom::Dim2(axis), symmetrical);
1048 sn = m.constrainedSnapStretch(Snapper::SNAPPOINT_NODE, _snap_points, Geom::Coord(geom_scale_2geom[axis]), to_2geom(_origin_for_specpoints), Geom::Dim2(axis), symmetrical);
1050 if (bb.getSnapped()) {
1051 // We snapped the bbox (which is either visual or geometric)
1052 bd = fabs(bb.getTransformation()[axis] - default_scale_2geom[axis]);
1053 default_scale_2geom[axis] = bb.getTransformation()[axis];
1054 }
1056 if (sn.getSnapped()) {
1057 sd = fabs(sn.getTransformation()[axis] - geom_scale_2geom[axis]);
1058 geom_scale_2geom[axis] = sn.getTransformation()[axis];
1059 }
1061 if (symmetrical) {
1062 // on ctrl, apply symmetrical scaling instead of stretching
1063 // Preserve aspect ratio, but never flip in the dimension not being edited (by using fabs())
1064 default_scale_2geom[perp] = fabs(default_scale_2geom[axis]);
1065 geom_scale_2geom[perp] = fabs(geom_scale_2geom[axis]);
1066 }
1068 if (!(bb.getSnapped() || sn.getSnapped())) {
1069 // We didn't snap at all! Don't update the handle position, just calculate the new transformation
1070 _calcAbsAffineDefault(from_2geom(default_scale_2geom));
1071 _desktop->snapindicator->remove_snappoint();
1072 } else if (bd < sd) {
1073 _desktop->snapindicator->set_new_snappoint(bb);
1074 // Calculate the new transformation and update the handle position
1075 pt = _calcAbsAffineDefault(from_2geom(default_scale_2geom));
1076 } else {
1077 _desktop->snapindicator->set_new_snappoint(sn);
1078 // We snapped the special points (e.g. nodes), which are not at the visual bbox
1079 // The handle location however (pt) might however be at the visual bbox, so we
1080 // will have to calculate pt taking the stroke width into account
1081 pt = _calcAbsAffineGeom(from_2geom(geom_scale_2geom));
1082 }
1083 }
1085 // status text
1086 _message_context.setF(Inkscape::IMMEDIATE_MESSAGE,
1087 _("<b>Scale</b>: %0.2f%% x %0.2f%%; with <b>Ctrl</b> to lock ratio"),
1088 100 * _absolute_affine[0], 100 * _absolute_affine[3]);
1090 return TRUE;
1091 }
1093 gboolean Inkscape::SelTrans::skewRequest(SPSelTransHandle const &handle, NR::Point &pt, guint state)
1094 {
1095 /* When skewing (or rotating):
1096 * 1) the stroke width will not change. This makes life much easier because we don't have to
1097 * account for that (like for scaling or stretching). As a consequence, all points will
1098 * have the same origin for the transformation and for the snapping.
1099 * 2) When holding shift, the transformation will be relative to the point opposite of
1100 * the handle; otherwise it will be relative to the center as set for the selection
1101 */
1103 NR::Dim2 dim_a;
1104 NR::Dim2 dim_b;
1106 switch (handle.cursor) {
1107 case GDK_SB_H_DOUBLE_ARROW:
1108 dim_a = NR::Y;
1109 dim_b = NR::X;
1110 break;
1111 case GDK_SB_V_DOUBLE_ARROW:
1112 dim_a = NR::X;
1113 dim_b = NR::Y;
1114 break;
1115 default:
1116 g_assert_not_reached();
1117 abort();
1118 break;
1119 }
1121 NR::Point const initial_delta = _point - _origin;
1123 if (fabs(initial_delta[dim_a]) < 1e-15) {
1124 return false;
1125 }
1127 // Calculate the scale factors, which can be either visual or geometric
1128 // depending on which type of bbox is currently being used (see preferences -> selector tool)
1129 NR::scale scale = calcScaleFactors(_point, pt, _origin, false);
1130 NR::scale skew = calcScaleFactors(_point, pt, _origin, true);
1131 scale[dim_b] = 1;
1132 skew[dim_b] = 1;
1134 if (fabs(scale[dim_a]) < 1) {
1135 // Prevent shrinking of the selected object, while allowing mirroring
1136 scale[dim_a] = sign(scale[dim_a]);
1137 } else {
1138 // Allow expanding of the selected object by integer multiples
1139 scale[dim_a] = floor(scale[dim_a] + 0.5);
1140 }
1142 double radians = atan(skew[dim_a] / scale[dim_a]);
1144 if (state & GDK_CONTROL_MASK) {
1145 // Snap to defined angle increments
1146 int snaps = prefs_get_int_attribute("options.rotationsnapsperpi", "value", 12);
1147 if (snaps) {
1148 double sections = floor(radians * snaps / M_PI + .5);
1149 if (fabs(sections) >= snaps / 2) {
1150 sections = sign(sections) * (snaps / 2 - 1);
1151 }
1152 radians = (M_PI / snaps) * sections;
1153 }
1154 skew[dim_a] = tan(radians) * scale[dim_a];
1155 } else {
1156 // Snap to objects, grids, guides
1158 SnapManager &m = _desktop->namedview->snap_manager;
1159 m.setup(_desktop, false, _items_const);
1161 Inkscape::Snapper::ConstraintLine const constraint(component_vectors[dim_b]);
1162 NR::Point const s(skew[dim_a], scale[dim_a]);
1163 Inkscape::SnappedPoint bb = m.constrainedSnapSkew(Inkscape::Snapper::SNAPPOINT_BBOX, _bbox_points, constraint, to_2geom(s), to_2geom(_origin), Geom::Dim2(dim_b));
1164 Inkscape::SnappedPoint sn = m.constrainedSnapSkew(Inkscape::Snapper::SNAPPOINT_NODE, _snap_points, constraint, to_2geom(s), to_2geom(_origin), Geom::Dim2(dim_b));
1166 if (bb.getSnapped() || sn.getSnapped()) {
1167 // We snapped something, so change the skew to reflect it
1168 NR::Coord const bd = bb.getSnapped() ? bb.getTransformation()[0] : NR_HUGE;
1169 NR::Coord const sd = sn.getSnapped() ? sn.getTransformation()[0] : NR_HUGE;
1170 if (bd < sd) {
1171 _desktop->snapindicator->set_new_snappoint(bb);
1172 skew[dim_a] = bd;
1173 } else {
1174 _desktop->snapindicator->set_new_snappoint(sn);
1175 skew[dim_a] = sd;
1176 }
1177 } else {
1178 _desktop->snapindicator->remove_snappoint();
1179 }
1180 }
1182 // Update the handle position
1183 pt[dim_b] = initial_delta[dim_a] * skew[dim_a] + _point[dim_b];
1184 pt[dim_a] = initial_delta[dim_a] * scale[dim_a] + _origin[dim_a];
1186 // Calculate the relative affine
1187 _relative_affine = NR::identity();
1188 _relative_affine[2*dim_a + dim_a] = (pt[dim_a] - _origin[dim_a]) / initial_delta[dim_a];
1189 _relative_affine[2*dim_a + (dim_b)] = (pt[dim_b] - _point[dim_b]) / initial_delta[dim_a];
1190 _relative_affine[2*(dim_b) + (dim_a)] = 0;
1191 _relative_affine[2*(dim_b) + (dim_b)] = 1;
1193 for (int i = 0; i < 2; i++) {
1194 if (fabs(_relative_affine[3*i]) < 1e-15) {
1195 _relative_affine[3*i] = 1e-15;
1196 }
1197 }
1199 // Update the status text
1200 double degrees = mod360symm(Geom::rad_to_deg(radians));
1201 _message_context.setF(Inkscape::IMMEDIATE_MESSAGE,
1202 // TRANSLATORS: don't modify the first ";"
1203 // (it will NOT be displayed as ";" - only the second one will be)
1204 _("<b>Skew</b>: %0.2f°; with <b>Ctrl</b> to snap angle"),
1205 degrees);
1207 return TRUE;
1208 }
1210 gboolean Inkscape::SelTrans::rotateRequest(NR::Point &pt, guint state)
1211 {
1212 /* When rotating (or skewing):
1213 * 1) the stroke width will not change. This makes life much easier because we don't have to
1214 * account for that (like for scaling or stretching). As a consequence, all points will
1215 * have the same origin for the transformation and for the snapping.
1216 * 2) When holding shift, the transformation will be relative to the point opposite of
1217 * the handle; otherwise it will be relative to the center as set for the selection
1218 */
1220 int snaps = prefs_get_int_attribute("options.rotationsnapsperpi", "value", 12);
1222 // rotate affine in rotate
1223 NR::Point const d1 = _point - _origin;
1224 NR::Point const d2 = pt - _origin;
1226 NR::Coord const h1 = NR::L2(d1); // initial radius
1227 if (h1 < 1e-15) return FALSE;
1228 NR::Point q1 = d1 / h1; // normalized initial vector to handle
1229 NR::Coord const h2 = NR::L2(d2); // new radius
1230 if (fabs(h2) < 1e-15) return FALSE;
1231 NR::Point q2 = d2 / h2; // normalized new vector to handle
1233 double radians;
1234 if (state & GDK_CONTROL_MASK) {
1235 // Snap to defined angle increments
1236 double cos_t = NR::dot(q1, q2);
1237 double sin_t = NR::dot(NR::rot90(q1), q2);
1238 radians = atan2(sin_t, cos_t);
1239 if (snaps) {
1240 radians = ( M_PI / snaps ) * floor( radians * snaps / M_PI + .5 );
1241 }
1242 q1 = NR::Point(1, 0);
1243 q2 = NR::Point(cos(radians), sin(radians));
1244 } else {
1245 radians = atan2(NR::dot(NR::rot90(d1), d2),
1246 NR::dot(d1, d2));
1247 }
1249 NR::rotate const r1(q1);
1250 NR::rotate const r2(q2);
1252 // Calculate the relative affine
1253 _relative_affine = NR::Matrix(r2/r1);
1255 // Update the handle position
1256 pt = _point * NR::translate(-_origin) * _relative_affine * NR::translate(_origin);
1258 // Update the status text
1259 double degrees = mod360symm(Geom::rad_to_deg(radians));
1260 _message_context.setF(Inkscape::IMMEDIATE_MESSAGE,
1261 // TRANSLATORS: don't modify the first ";"
1262 // (it will NOT be displayed as ";" - only the second one will be)
1263 _("<b>Rotate</b>: %0.2f°; with <b>Ctrl</b> to snap angle"), degrees);
1265 return TRUE;
1266 }
1268 gboolean Inkscape::SelTrans::centerRequest(NR::Point &pt, guint state)
1269 {
1270 SnapManager &m = _desktop->namedview->snap_manager;
1271 m.setup(_desktop);
1272 Geom::Point pt2g = to_2geom(pt);
1273 m.freeSnapReturnByRef(Snapper::SNAPPOINT_NODE, pt2g);
1274 pt = from_2geom(pt2g);
1276 if (state & GDK_CONTROL_MASK) {
1277 if ( fabs(_point[NR::X] - pt[NR::X]) > fabs(_point[NR::Y] - pt[NR::Y]) ) {
1278 pt[NR::Y] = _point[NR::Y];
1279 } else {
1280 pt[NR::X] = _point[NR::X];
1281 }
1282 }
1284 if ( !(state & GDK_SHIFT_MASK) && _bbox ) {
1285 // screen pixels to snap center to bbox
1286 #define SNAP_DIST 5
1287 // FIXME: take from prefs
1288 double snap_dist = SNAP_DIST / _desktop->current_zoom();
1290 for (int i = 0; i < 2; i++) {
1291 if (fabs(pt[i] - _bbox->min()[i]) < snap_dist) {
1292 pt[i] = _bbox->min()[i];
1293 }
1294 if (fabs(pt[i] - _bbox->midpoint()[i]) < snap_dist) {
1295 pt[i] = _bbox->midpoint()[i];
1296 }
1297 if (fabs(pt[i] - _bbox->max()[i]) < snap_dist) {
1298 pt[i] = _bbox->max()[i];
1299 }
1300 }
1301 }
1303 // status text
1304 GString *xs = SP_PX_TO_METRIC_STRING(pt[NR::X], _desktop->namedview->getDefaultMetric());
1305 GString *ys = SP_PX_TO_METRIC_STRING(pt[NR::Y], _desktop->namedview->getDefaultMetric());
1306 _message_context.setF(Inkscape::NORMAL_MESSAGE, _("Move <b>center</b> to %s, %s"), xs->str, ys->str);
1307 g_string_free(xs, FALSE);
1308 g_string_free(ys, FALSE);
1310 return TRUE;
1311 }
1313 /*
1314 * handlers for handle movement
1315 *
1316 */
1318 void sp_sel_trans_stretch(Inkscape::SelTrans *seltrans, SPSelTransHandle const &handle, NR::Point &pt, guint state)
1319 {
1320 seltrans->stretch(handle, pt, state);
1321 }
1323 void sp_sel_trans_scale(Inkscape::SelTrans *seltrans, SPSelTransHandle const &, NR::Point &pt, guint state)
1324 {
1325 seltrans->scale(pt, state);
1326 }
1328 void sp_sel_trans_skew(Inkscape::SelTrans *seltrans, SPSelTransHandle const &handle, NR::Point &pt, guint state)
1329 {
1330 seltrans->skew(handle, pt, state);
1331 }
1333 void sp_sel_trans_rotate(Inkscape::SelTrans *seltrans, SPSelTransHandle const &, NR::Point &pt, guint state)
1334 {
1335 seltrans->rotate(pt, state);
1336 }
1338 void Inkscape::SelTrans::stretch(SPSelTransHandle const &/*handle*/, NR::Point &/*pt*/, guint /*state*/)
1339 {
1340 transform(_absolute_affine, NR::Point(0, 0)); // we have already accounted for origin, so pass 0,0
1341 }
1343 void Inkscape::SelTrans::scale(NR::Point &/*pt*/, guint /*state*/)
1344 {
1345 transform(_absolute_affine, NR::Point(0, 0)); // we have already accounted for origin, so pass 0,0
1346 }
1348 void Inkscape::SelTrans::skew(SPSelTransHandle const &/*handle*/, NR::Point &/*pt*/, guint /*state*/)
1349 {
1350 transform(_relative_affine, _origin);
1351 }
1353 void Inkscape::SelTrans::rotate(NR::Point &/*pt*/, guint /*state*/)
1354 {
1355 transform(_relative_affine, _origin);
1356 }
1358 void sp_sel_trans_center(Inkscape::SelTrans *seltrans, SPSelTransHandle const &, NR::Point &pt, guint /*state*/)
1359 {
1360 seltrans->setCenter(pt);
1361 }
1364 void Inkscape::SelTrans::moveTo(NR::Point const &xy, guint state)
1365 {
1366 SnapManager &m = _desktop->namedview->snap_manager;
1367 m.setup(_desktop, true, _items_const);
1369 /* The amount that we've moved by during this drag */
1370 Geom::Point dxy = to_2geom(xy - _point);
1372 bool const alt = (state & GDK_MOD1_MASK);
1373 bool const control = (state & GDK_CONTROL_MASK);
1374 bool const shift = (state & GDK_SHIFT_MASK);
1376 if (alt) {
1378 /* Alt pressed means keep offset: snap the moved distance to the grid.
1379 ** FIXME: this will snap to more than just the grid, nowadays.
1380 */
1382 m.freeSnapReturnByRef(Snapper::SNAPPOINT_NODE, dxy);
1384 } else if (!shift) {
1386 /* We're snapping to things, possibly with a constraint to horizontal or
1387 ** vertical movement. Obtain a list of possible translations and then
1388 ** pick the smallest.
1389 */
1391 /* This will be our list of possible translations */
1392 std::list<Inkscape::SnappedPoint> s;
1394 if (control) {
1396 /* Snap to things, and also constrain to horizontal or vertical movement */
1398 for (unsigned int dim = 0; dim < 2; dim++) {
1399 // When doing a constrained translation, all points will move in the same direction, i.e.
1400 // either horizontally or vertically. Therefore we only have to specify the direction of
1401 // the constraint-line once. The constraint lines are parallel, but might not be colinear.
1402 // Therefore we will have to set the point through which the constraint-line runs
1403 // individually for each point to be snapped; this will be handled however by _snapTransformed()
1404 s.push_back(m.constrainedSnapTranslation(Inkscape::Snapper::SNAPPOINT_BBOX,
1405 _bbox_points,
1406 Inkscape::Snapper::ConstraintLine(component_vectors[dim]),
1407 dxy));
1409 s.push_back(m.constrainedSnapTranslation(Inkscape::Snapper::SNAPPOINT_NODE,
1410 _snap_points,
1411 Inkscape::Snapper::ConstraintLine(component_vectors[dim]),
1412 dxy));
1413 }
1415 } else {
1417 // Let's leave this timer code here for a while. I'll probably need it in the near future (Diederik van Lierop)
1418 /* GTimeVal starttime;
1419 GTimeVal endtime;
1420 g_get_current_time(&starttime); */
1422 /* Snap to things with no constraint */
1423 s.push_back(m.freeSnapTranslation(Inkscape::Snapper::SNAPPOINT_BBOX, _bbox_points, dxy));
1424 s.push_back(m.freeSnapTranslation(Inkscape::Snapper::SNAPPOINT_NODE, _snap_points, dxy));
1426 /*g_get_current_time(&endtime);
1427 double elapsed = ((((double)endtime.tv_sec - starttime.tv_sec) * G_USEC_PER_SEC + (endtime.tv_usec - starttime.tv_usec))) / 1000.0;
1428 std::cout << "Time spent snapping: " << elapsed << std::endl; */
1429 }
1431 /* Pick one */
1432 Inkscape::SnappedPoint best_snapped_point;
1433 g_assert(best_snapped_point.getDistance() == NR_HUGE);
1434 for (std::list<Inkscape::SnappedPoint>::const_iterator i = s.begin(); i != s.end(); i++) {
1435 if (i->getSnapped()) {
1436 if (i->getDistance() < best_snapped_point.getDistance()) {
1437 best_snapped_point = *i;
1438 dxy = i->getTransformation();
1439 }
1440 }
1441 }
1442 if (best_snapped_point.getSnapped()) {
1443 _desktop->snapindicator->set_new_snappoint(best_snapped_point);
1444 } else {
1445 // We didn't snap, so remove any previous snap indicator
1446 _desktop->snapindicator->remove_snappoint();
1447 if (control) {
1448 // If we didn't snap, then we should still constrain horizontally or vertically
1449 // (When we did snap, then this constraint has already been enforced by
1450 // calling constrainedSnapTranslation() above)
1451 if (fabs(dxy[Geom::X]) > fabs(dxy[Geom::Y])) {
1452 dxy[Geom::Y] = 0;
1453 } else {
1454 dxy[Geom::X] = 0;
1455 }
1456 }
1457 }
1458 }
1460 Geom::Matrix const move((Geom::Translate(dxy)));
1461 Geom::Point const norm(0, 0);
1462 transform(from_2geom(move), from_2geom(norm));
1464 // status text
1465 GString *xs = SP_PX_TO_METRIC_STRING(dxy[Geom::X], _desktop->namedview->getDefaultMetric());
1466 GString *ys = SP_PX_TO_METRIC_STRING(dxy[Geom::Y], _desktop->namedview->getDefaultMetric());
1467 _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);
1468 g_string_free(xs, TRUE);
1469 g_string_free(ys, TRUE);
1470 }
1472 // Given a location of a handle at the visual bounding box, find the corresponding location at the
1473 // geometrical bounding box
1474 NR::Point Inkscape::SelTrans::_getGeomHandlePos(NR::Point const &visual_handle_pos)
1475 {
1476 if ( _snap_bbox_type == SPItem::GEOMETRIC_BBOX) {
1477 // When the selector tool is using geometric bboxes, then the handle is already
1478 // located at one of the geometric bbox corners
1479 return visual_handle_pos;
1480 }
1482 if (!_geometric_bbox) {
1483 //_getGeomHandlePos() can only be used after _geometric_bbox has been defined!
1484 return visual_handle_pos;
1485 }
1487 // Using the NR::Rect constructor below ensures that "min() < max()", which is important
1488 // because this will also hold for _bbox, and which is required for get_scale_transform_with_stroke()
1489 NR::Rect new_bbox = NR::Rect(_origin_for_bboxpoints, visual_handle_pos); // new visual bounding box
1490 // Please note that the new_bbox might in fact be just a single line, for example when stretching (in
1491 // which case the handle and origin will be aligned vertically or horizontally)
1492 NR::Point normalized_handle_pos = (visual_handle_pos - new_bbox.min()) * NR::scale(new_bbox.dimensions()).inverse();
1494 // Calculate the absolute affine while taking into account the scaling of the stroke width
1495 int transform_stroke = prefs_get_int_attribute ("options.transform", "stroke", 1);
1496 NR::Matrix abs_affine = get_scale_transform_with_stroke (*_bbox, _strokewidth, transform_stroke,
1497 new_bbox.min()[NR::X], new_bbox.min()[NR::Y], new_bbox.max()[NR::X], new_bbox.max()[NR::Y]);
1499 // Calculate the scaled geometrical bbox
1500 NR::Rect new_geom_bbox = NR::Rect(_geometric_bbox->min() * abs_affine, _geometric_bbox->max() * abs_affine);
1501 // Find the location of the handle on this new geometrical bbox
1502 return normalized_handle_pos * NR::scale(new_geom_bbox.dimensions()) + new_geom_bbox.min(); //new position of the geometric handle
1503 }
1505 NR::scale Inkscape::calcScaleFactors(NR::Point const &initial_point, NR::Point const &new_point, NR::Point const &origin, bool const skew)
1506 {
1507 // Work out the new scale factors for the bbox
1509 NR::Point const initial_delta = initial_point - origin;
1510 NR::Point const new_delta = new_point - origin;
1511 NR::Point const offset = new_point - initial_point;
1512 NR::scale scale(1, 1);
1514 for ( unsigned int i = 0 ; i < 2 ; i++ ) {
1515 if ( fabs(initial_delta[i]) > 1e-6 ) {
1516 if (skew) {
1517 scale[i] = offset[1-i] / initial_delta[i];
1518 } else {
1519 scale[i] = new_delta[i] / initial_delta[i];
1520 }
1521 }
1522 }
1524 return scale;
1525 }
1527 // Only for scaling/stretching
1528 NR::Point Inkscape::SelTrans::_calcAbsAffineDefault(NR::scale const default_scale)
1529 {
1530 NR::Matrix abs_affine = NR::translate(-_origin) * NR::Matrix(default_scale) * NR::translate(_origin);
1531 NR::Point new_bbox_min = _approximate_bbox->min() * abs_affine;
1532 NR::Point new_bbox_max = _approximate_bbox->max() * abs_affine;
1534 int transform_stroke = false;
1535 gdouble strokewidth = 0;
1537 if ( _snap_bbox_type != SPItem::GEOMETRIC_BBOX) {
1538 transform_stroke = prefs_get_int_attribute ("options.transform", "stroke", 1);
1539 strokewidth = _strokewidth;
1540 }
1542 _absolute_affine = get_scale_transform_with_stroke (*_approximate_bbox, strokewidth, transform_stroke,
1543 new_bbox_min[NR::X], new_bbox_min[NR::Y], new_bbox_max[NR::X], new_bbox_max[NR::Y]);
1545 // return the new handle position
1546 return ( _point - _origin ) * default_scale + _origin;
1547 }
1549 // Only for scaling/stretching
1550 NR::Point Inkscape::SelTrans::_calcAbsAffineGeom(NR::scale const geom_scale)
1551 {
1552 _relative_affine = NR::Matrix(geom_scale);
1553 _absolute_affine = NR::translate(-_origin_for_specpoints) * _relative_affine * NR::translate(_origin_for_specpoints);
1555 bool const transform_stroke = prefs_get_int_attribute ("options.transform", "stroke", 1);
1556 NR::Rect visual_bbox = get_visual_bbox(_geometric_bbox, _absolute_affine, _strokewidth, transform_stroke);
1558 // return the new handle position
1559 return visual_bbox.min() + visual_bbox.dimensions() * NR::scale(_handle_x, _handle_y);
1560 }
1563 /*
1564 Local Variables:
1565 mode:c++
1566 c-file-style:"stroustrup"
1567 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
1568 indent-tabs-mode:nil
1569 fill-column:99
1570 End:
1571 */
1572 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4 :