1 /** @file
2 * @brief Helper object for transforming selected items
3 */
4 /* Authors:
5 * Lauris Kaplinski <lauris@kaplinski.com>
6 * bulia byak <buliabyak@users.sf.net>
7 * Carl Hetherington <inkscape@carlh.net>
8 * Diederik van Lierop <mail@diedenrezi.nl>
9 *
10 * Copyright (C) 1999-2002 Lauris Kaplinski
11 * Copyright (C) 1999-2008 Authors
12 *
13 * Released under GNU GPL, read the file 'COPYING' for more information
14 */
16 #ifdef HAVE_CONFIG_H
17 # include <config.h>
18 #endif
19 #include <cstring>
20 #include <string>
22 #include <2geom/transforms.h>
23 #include <gdk/gdkkeysyms.h>
24 #include "document.h"
25 #include "sp-namedview.h"
26 #include "desktop.h"
27 #include "desktop-handles.h"
28 #include "desktop-style.h"
29 #include "knot.h"
30 #include "snap.h"
31 #include "selection.h"
32 #include "select-context.h"
33 #include "sp-item.h"
34 #include "sp-item-transform.h"
35 #include "seltrans-handles.h"
36 #include "seltrans.h"
37 #include "selection-chemistry.h"
38 #include "sp-metrics.h"
39 #include "verbs.h"
40 #include <glibmm/i18n.h>
41 #include "display/sp-ctrlline.h"
42 #include "preferences.h"
43 #include "xml/repr.h"
44 #include "mod360.h"
45 #include <2geom/angle.h>
46 #include "display/snap-indicator.h"
49 static void sp_remove_handles(SPKnot *knot[], gint num);
51 static void sp_sel_trans_handle_grab(SPKnot *knot, guint state, gpointer data);
52 static void sp_sel_trans_handle_ungrab(SPKnot *knot, guint state, gpointer data);
53 static void sp_sel_trans_handle_click(SPKnot *knot, guint state, gpointer data);
54 static void sp_sel_trans_handle_new_event(SPKnot *knot, Geom::Point *position, guint32 state, gpointer data);
55 static gboolean sp_sel_trans_handle_request(SPKnot *knot, Geom::Point *p, guint state, gboolean *data);
57 extern GdkPixbuf *handles[];
59 static gboolean sp_seltrans_handle_event(SPKnot *knot, GdkEvent *event, gpointer)
60 {
61 switch (event->type) {
62 case GDK_MOTION_NOTIFY:
63 break;
64 case GDK_KEY_PRESS:
65 if (get_group0_keyval (&event->key) == GDK_space) {
66 /* stamping mode: both mode(show content and outline) operation with knot */
67 if (!SP_KNOT_IS_GRABBED(knot)) {
68 return FALSE;
69 }
70 SPDesktop *desktop = knot->desktop;
71 Inkscape::SelTrans *seltrans = SP_SELECT_CONTEXT(desktop->event_context)->_seltrans;
72 seltrans->stamp();
73 return TRUE;
74 }
75 break;
76 default:
77 break;
78 }
80 return FALSE;
81 }
83 Inkscape::SelTrans::SelTrans(SPDesktop *desktop) :
84 _desktop(desktop),
85 _selcue(desktop),
86 _state(STATE_SCALE),
87 _show(SHOW_CONTENT),
88 _grabbed(false),
89 _show_handles(true),
90 _bbox(),
91 _approximate_bbox(),
92 _absolute_affine(Geom::Scale(1,1)),
93 _opposite(Geom::Point(0,0)),
94 _opposite_for_specpoints(Geom::Point(0,0)),
95 _opposite_for_bboxpoints(Geom::Point(0,0)),
96 _origin_for_specpoints(Geom::Point(0,0)),
97 _origin_for_bboxpoints(Geom::Point(0,0)),
98 _chandle(NULL),
99 _stamp_cache(NULL),
100 _message_context(desktop->messageStack())
101 {
102 Inkscape::Preferences *prefs = Inkscape::Preferences::get();
103 int prefs_bbox = prefs->getBool("/tools/bounding_box");
104 _snap_bbox_type = !prefs_bbox ?
105 SPItem::APPROXIMATE_BBOX : SPItem::GEOMETRIC_BBOX;
107 g_return_if_fail(desktop != NULL);
109 for (int i = 0; i < 8; i++) {
110 _shandle[i] = NULL;
111 _rhandle[i] = NULL;
112 }
114 _updateVolatileState();
115 _current_relative_affine.setIdentity();
117 _center_is_set = false; // reread _center from items, or set to bbox midpoint
119 _updateHandles();
121 _selection = sp_desktop_selection(desktop);
123 _norm = sp_canvas_item_new(sp_desktop_controls(desktop),
124 SP_TYPE_CTRL,
125 "anchor", GTK_ANCHOR_CENTER,
126 "mode", SP_CTRL_MODE_COLOR,
127 "shape", SP_CTRL_SHAPE_BITMAP,
128 "size", 13.0,
129 "filled", TRUE,
130 "fill_color", 0x00000000,
131 "stroked", TRUE,
132 "stroke_color", 0x000000a0,
133 "pixbuf", handles[12],
134 NULL);
136 _grip = sp_canvas_item_new(sp_desktop_controls(desktop),
137 SP_TYPE_CTRL,
138 "anchor", GTK_ANCHOR_CENTER,
139 "mode", SP_CTRL_MODE_XOR,
140 "shape", SP_CTRL_SHAPE_CROSS,
141 "size", 7.0,
142 "filled", TRUE,
143 "fill_color", 0xffffff7f,
144 "stroked", TRUE,
145 "stroke_color", 0xffffffff,
146 "pixbuf", handles[12],
147 NULL);
149 sp_canvas_item_hide(_grip);
150 sp_canvas_item_hide(_norm);
152 for (int i = 0; i < 4; i++) {
153 _l[i] = sp_canvas_item_new(sp_desktop_controls(desktop), SP_TYPE_CTRLLINE, NULL);
154 sp_canvas_item_hide(_l[i]);
155 }
157 _sel_changed_connection = _selection->connectChanged(
158 sigc::mem_fun(*this, &Inkscape::SelTrans::_selChanged)
159 );
161 _sel_modified_connection = _selection->connectModified(
162 sigc::mem_fun(*this, &Inkscape::SelTrans::_selModified)
163 );
164 }
166 Inkscape::SelTrans::~SelTrans()
167 {
168 _sel_changed_connection.disconnect();
169 _sel_modified_connection.disconnect();
171 for (unsigned int i = 0; i < 8; i++) {
172 if (_shandle[i]) {
173 g_object_unref(G_OBJECT(_shandle[i]));
174 _shandle[i] = NULL;
175 }
176 if (_rhandle[i]) {
177 g_object_unref(G_OBJECT(_rhandle[i]));
178 _rhandle[i] = NULL;
179 }
180 }
181 if (_chandle) {
182 g_object_unref(G_OBJECT(_chandle));
183 _chandle = NULL;
184 }
186 if (_norm) {
187 gtk_object_destroy(GTK_OBJECT(_norm));
188 _norm = NULL;
189 }
190 if (_grip) {
191 gtk_object_destroy(GTK_OBJECT(_grip));
192 _grip = NULL;
193 }
194 for (int i = 0; i < 4; i++) {
195 if (_l[i]) {
196 gtk_object_destroy(GTK_OBJECT(_l[i]));
197 _l[i] = NULL;
198 }
199 }
201 for (unsigned i = 0; i < _items.size(); i++) {
202 sp_object_unref(SP_OBJECT(_items[i]), NULL);
203 }
205 _items.clear();
206 _items_const.clear();
207 _items_affines.clear();
208 _items_centers.clear();
209 }
211 void Inkscape::SelTrans::resetState()
212 {
213 _state = STATE_SCALE;
214 }
216 void Inkscape::SelTrans::increaseState()
217 {
218 if (_state == STATE_SCALE) {
219 _state = STATE_ROTATE;
220 } else {
221 _state = STATE_SCALE;
222 }
224 _center_is_set = true; // no need to reread center
226 _updateHandles();
227 }
229 void Inkscape::SelTrans::setCenter(Geom::Point const &p)
230 {
231 _center = p;
232 _center_is_set = true;
234 // Write the new center position into all selected items
235 for (GSList const *l = _desktop->selection->itemList(); l; l = l->next) {
236 SPItem *it = (SPItem*)SP_OBJECT(l->data);
237 it->setCenter(p);
238 // only set the value; updating repr and document_done will be done once, on ungrab
239 }
241 _updateHandles();
242 }
244 void Inkscape::SelTrans::grab(Geom::Point const &p, gdouble x, gdouble y, bool show_handles)
245 {
246 Inkscape::Selection *selection = sp_desktop_selection(_desktop);
248 g_return_if_fail(!_grabbed);
250 _grabbed = true;
251 _show_handles = show_handles;
252 _updateVolatileState();
253 _current_relative_affine.setIdentity();
255 _changed = false;
257 if (_empty) {
258 return;
259 }
261 for (GSList const *l = selection->itemList(); l; l = l->next) {
262 SPItem *it = (SPItem *)sp_object_ref(SP_OBJECT(l->data), NULL);
263 _items.push_back(it);
264 _items_const.push_back(it);
265 _items_affines.push_back(sp_item_i2d_affine(it));
266 _items_centers.push_back(it->getCenter()); // for content-dragging, we need to remember original centers
267 }
269 _handle_x = x;
270 _handle_y = y;
272 // The selector tool should snap the bbox, special snappoints, and path nodes
273 // (The special points are the handles, center, rotation axis, font baseline, ends of spiral, etc.)
275 // First, determine the bounding box for snapping ...
276 _bbox = selection->bounds(_snap_bbox_type);
277 _approximate_bbox = selection->bounds(SPItem::APPROXIMATE_BBOX); // Used for correctly scaling the strokewidth
278 _geometric_bbox = selection->bounds(SPItem::GEOMETRIC_BBOX);
279 _point = p;
280 if (_geometric_bbox) {
281 _point_geom = _geometric_bbox->min() + _geometric_bbox->dimensions() * Geom::Scale(x, y);
282 } else {
283 _point_geom = p;
284 }
286 // Next, get all points to consider for snapping
287 SnapManager const &m = _desktop->namedview->snap_manager;
288 Inkscape::SnapPreferences local_snapprefs = m.snapprefs;
289 local_snapprefs.setSnapToItemNode(true); // We should get at least the cusp nodes here. This might
290 // have been turned off because (for example) the user only want paths as a snap target, not nodes
291 // but as a snap source we still need some nodes though!
292 _snap_points.clear();
293 _snap_points = selection->getSnapPoints(&local_snapprefs);
294 std::vector<std::pair<Geom::Point, int> > snap_points_hull = selection->getSnapPointsConvexHull(&local_snapprefs);
295 if (_snap_points.size() > 100) {
296 /* Snapping a huge number of nodes will take way too long, so limit the number of snappable nodes
297 An average user would rarely ever try to snap such a large number of nodes anyway, because
298 (s)he could hardly discern which node would be snapping */
299 _snap_points = snap_points_hull;
300 // Unfortunately, by now we will have lost the font-baseline snappoints :-(
301 }
303 // Find bbox hulling all special points, which excludes stroke width. Here we need to include the
304 // path nodes, for example because a rectangle which has been converted to a path doesn't have
305 // any other special points
306 Geom::Rect snap_points_bbox;
307 if ( snap_points_hull.empty() == false ) {
308 std::vector<std::pair<Geom::Point, int> >::iterator i = snap_points_hull.begin();
309 snap_points_bbox = Geom::Rect((*i).first, (*i).first);
310 i++;
311 while (i != snap_points_hull.end()) {
312 snap_points_bbox.expandTo((*i).first);
313 i++;
314 }
315 }
317 _bbox_points.clear();
318 if (_bbox) {
319 if (m.snapprefs.getSnapModeBBox()) {
320 getBBoxPoints(_bbox, &_bbox_points, false, true, m.snapprefs.getSnapBBoxEdgeMidpoints(), m.snapprefs.getSnapBBoxMidpoints());
321 }
322 // There are two separate "opposites" (i.e. opposite w.r.t. the handle being dragged):
323 // - one for snapping the boundingbox, which can be either visual or geometric
324 // - one for snapping the special points
325 // The "opposite" in case of a geometric boundingbox always coincides with the "opposite" for the special points
326 // These distinct "opposites" are needed in the snapmanager to avoid bugs such as #sf1540195 (in which
327 // a box is caught between two guides)
328 _opposite_for_bboxpoints = _bbox->min() + _bbox->dimensions() * Geom::Scale(1-x, 1-y);
329 _opposite_for_specpoints = snap_points_bbox.min() + snap_points_bbox.dimensions() * Geom::Scale(1-x, 1-y);
330 _opposite = _opposite_for_bboxpoints;
331 }
333 // When snapping the node closest to the mouse pointer is absolutely preferred over the closest snap
334 // (i.e. when weight == 1), then we will not even try to snap to other points and discard those other
335 // points immediately.
336 Inkscape::Preferences *prefs = Inkscape::Preferences::get();
337 if (prefs->getBool("/options/snapclosestonly/value", false)) {
338 if (m.snapprefs.getSnapModeNode()) {
339 _keepClosestPointOnly(_snap_points, p);
340 } else {
341 _snap_points.clear(); // don't keep any point
342 }
344 if (m.snapprefs.getSnapModeBBox()) {
345 _keepClosestPointOnly(_bbox_points, p);
346 } else {
347 _bbox_points.clear(); // don't keep any point
348 }
350 g_assert(_bbox_points.size() < 2 && _snap_points.size() < 2);
351 if (_snap_points.size() == 1 && _bbox_points.size() == 1) { //both vectors can only have either one or zero elements
352 // So we have exactly one bbox corner and one node left; now find out which is closest and delete the other one
353 if (Geom::L2((_snap_points.at(0)).first - p) < Geom::L2((_bbox_points.at(0)).first - p)) {
354 _bbox_points.clear();
355 } else {
356 _snap_points.clear();
357 }
358 }
361 // Optionally, show the snap source
362 if (!(_state == STATE_ROTATE && x != 0.5 && y != 0.5)) { // but not when we're draging a rotation handle, because that won't snap
363 // Now either _bbox_points or _snap_points has a single element, the other one has zero..... or both have zero elements
364 g_assert((_bbox_points.size() + _snap_points.size()) < 2);
365 if (m.snapprefs.getSnapEnabledGlobally()) {
366 if (_bbox_points.size() == 1) {
367 _desktop->snapindicator->set_new_snapsource(_bbox_points.at(0));
368 } else if (_snap_points.size() == 1){
369 _desktop->snapindicator->set_new_snapsource(_snap_points.at(0));
370 }
371 }
372 }
373 }
375 //sp_event_context_snap_window_open(_desktop->event_context);
377 if ((x != -1) && (y != -1)) {
378 sp_canvas_item_show(_norm);
379 sp_canvas_item_show(_grip);
380 }
382 if (_show == SHOW_OUTLINE) {
383 for (int i = 0; i < 4; i++)
384 sp_canvas_item_show(_l[i]);
385 }
387 _updateHandles();
388 g_return_if_fail(_stamp_cache == NULL);
389 }
391 void Inkscape::SelTrans::transform(Geom::Matrix const &rel_affine, Geom::Point const &norm)
392 {
393 g_return_if_fail(_grabbed);
394 g_return_if_fail(!_empty);
396 Geom::Matrix const affine( Geom::Translate(-norm) * rel_affine * Geom::Translate(norm) );
398 if (_show == SHOW_CONTENT) {
399 // update the content
400 for (unsigned i = 0; i < _items.size(); i++) {
401 SPItem &item = *_items[i];
402 Geom::Matrix const &prev_transform = _items_affines[i];
403 sp_item_set_i2d_affine(&item, prev_transform * affine);
404 }
405 } else {
406 if (_bbox) {
407 Geom::Point p[4];
408 /* update the outline */
409 for (unsigned i = 0 ; i < 4 ; i++) {
410 p[i] = _bbox->corner(i) * affine;
411 }
412 for (unsigned i = 0 ; i < 4 ; i++) {
413 sp_ctrlline_set_coords(SP_CTRLLINE(_l[i]), p[i], p[(i+1)%4]);
414 }
415 }
416 }
418 _current_relative_affine = affine;
419 _changed = true;
420 _updateHandles();
421 }
423 void Inkscape::SelTrans::ungrab()
424 {
425 g_return_if_fail(_grabbed);
426 _grabbed = false;
427 _show_handles = true;
429 //sp_event_context_snap_window_closed(_desktop->event_context);
431 _desktop->snapindicator->remove_snapsource();
433 Inkscape::Selection *selection = sp_desktop_selection(_desktop);
434 _updateVolatileState();
436 for (unsigned i = 0; i < _items.size(); i++) {
437 sp_object_unref(SP_OBJECT(_items[i]), NULL);
438 }
440 sp_canvas_item_hide(_norm);
441 sp_canvas_item_hide(_grip);
443 if (_show == SHOW_OUTLINE) {
444 for (int i = 0; i < 4; i++)
445 sp_canvas_item_hide(_l[i]);
446 }
448 if (_stamp_cache) {
449 g_slist_free(_stamp_cache);
450 _stamp_cache = NULL;
451 }
453 _message_context.clear();
455 if (!_empty && _changed) {
456 sp_selection_apply_affine(selection, _current_relative_affine, (_show == SHOW_OUTLINE)? true : false);
457 if (_center) {
458 *_center *= _current_relative_affine;
459 _center_is_set = true;
460 }
462 // If dragging showed content live, sp_selection_apply_affine cannot change the centers
463 // appropriately - it does not know the original positions of the centers (all objects already have
464 // the new bboxes). So we need to reset the centers from our saved array.
465 if (_show != SHOW_OUTLINE && !_current_relative_affine.isTranslation()) {
466 for (unsigned i = 0; i < _items_centers.size(); i++) {
467 SPItem *currentItem = _items[i];
468 if (currentItem->isCenterSet()) { // only if it's already set
469 currentItem->setCenter (_items_centers[i] * _current_relative_affine);
470 SP_OBJECT(currentItem)->updateRepr();
471 }
472 }
473 }
475 _items.clear();
476 _items_const.clear();
477 _items_affines.clear();
478 _items_centers.clear();
480 if (_current_relative_affine.isTranslation()) {
481 sp_document_done(sp_desktop_document(_desktop), SP_VERB_CONTEXT_SELECT,
482 _("Move"));
483 } else if (_current_relative_affine.isScale()) {
484 sp_document_done(sp_desktop_document(_desktop), SP_VERB_CONTEXT_SELECT,
485 _("Scale"));
486 } else if (_current_relative_affine.isRotation()) {
487 sp_document_done(sp_desktop_document(_desktop), SP_VERB_CONTEXT_SELECT,
488 _("Rotate"));
489 } else {
490 sp_document_done(sp_desktop_document(_desktop), SP_VERB_CONTEXT_SELECT,
491 _("Skew"));
492 }
494 } else {
496 if (_center_is_set) {
497 // we were dragging center; update reprs and commit undoable action
498 for (GSList const *l = _desktop->selection->itemList(); l; l = l->next) {
499 SPItem *it = (SPItem*)SP_OBJECT(l->data);
500 SP_OBJECT(it)->updateRepr();
501 }
502 sp_document_done (sp_desktop_document(_desktop), SP_VERB_CONTEXT_SELECT,
503 _("Set center"));
504 }
506 _items.clear();
507 _items_const.clear();
508 _items_affines.clear();
509 _items_centers.clear();
510 _updateHandles();
511 }
512 }
514 /* fixme: This is really bad, as we compare positions for each stamp (Lauris) */
515 /* fixme: IMHO the best way to keep sort cache would be to implement timestamping at last */
517 void Inkscape::SelTrans::stamp()
518 {
519 Inkscape::Selection *selection = sp_desktop_selection(_desktop);
521 bool fixup = !_grabbed;
522 if ( fixup && _stamp_cache ) {
523 // TODO - give a proper fix. Simple temproary work-around for the grab() issue
524 g_slist_free(_stamp_cache);
525 _stamp_cache = NULL;
526 }
528 /* stamping mode */
529 if (!_empty) {
530 GSList *l;
531 if (_stamp_cache) {
532 l = _stamp_cache;
533 } else {
534 /* Build cache */
535 l = g_slist_copy((GSList *) selection->itemList());
536 l = g_slist_sort(l, (GCompareFunc) sp_object_compare_position);
537 _stamp_cache = l;
538 }
540 while (l) {
541 SPItem *original_item = SP_ITEM(l->data);
542 Inkscape::XML::Node *original_repr = SP_OBJECT_REPR(original_item);
544 // remember the position of the item
545 gint pos = original_repr->position();
546 // remember parent
547 Inkscape::XML::Node *parent = sp_repr_parent(original_repr);
549 Inkscape::XML::Node *copy_repr = original_repr->duplicate(parent->document());
551 // add the new repr to the parent
552 parent->appendChild(copy_repr);
553 // move to the saved position
554 copy_repr->setPosition(pos > 0 ? pos : 0);
556 SPItem *copy_item = (SPItem *) sp_desktop_document(_desktop)->getObjectByRepr(copy_repr);
558 Geom::Matrix const *new_affine;
559 if (_show == SHOW_OUTLINE) {
560 Geom::Matrix const i2d(sp_item_i2d_affine(original_item));
561 Geom::Matrix const i2dnew( i2d * _current_relative_affine );
562 sp_item_set_i2d_affine(copy_item, i2dnew);
563 new_affine = ©_item->transform;
564 } else {
565 new_affine = &original_item->transform;
566 }
568 sp_item_write_transform(copy_item, copy_repr, *new_affine);
570 if ( copy_item->isCenterSet() && _center ) {
571 copy_item->setCenter(*_center * _current_relative_affine);
572 }
574 Inkscape::GC::release(copy_repr);
575 l = l->next;
576 }
577 sp_document_done(sp_desktop_document(_desktop), SP_VERB_CONTEXT_SELECT,
578 _("Stamp"));
579 }
581 if ( fixup && _stamp_cache ) {
582 // TODO - give a proper fix. Simple temproary work-around for the grab() issue
583 g_slist_free(_stamp_cache);
584 _stamp_cache = NULL;
585 }
586 }
588 void Inkscape::SelTrans::_updateHandles()
589 {
590 if ( !_show_handles || _empty )
591 {
592 sp_remove_handles(_shandle, 8);
593 sp_remove_handles(_rhandle, 8);
594 sp_remove_handles(&_chandle, 1);
595 return;
596 }
598 // center handle
599 if ( _chandle == NULL ) {
600 _chandle = sp_knot_new(_desktop, _("<b>Center</b> of rotation and skewing: drag to reposition; scaling with Shift also uses this center"));
602 _chandle->setShape (SP_CTRL_SHAPE_BITMAP);
603 _chandle->setSize (13);
604 _chandle->setAnchor (handle_center.anchor);
605 _chandle->setMode (SP_CTRL_MODE_XOR);
606 _chandle->setFill(0x00000000, 0x00000000, 0x00000000);
607 _chandle->setStroke(0x000000ff, 0xff0000b0, 0xff0000b0);
608 _chandle->setPixbuf(handles[handle_center.control]);
609 sp_knot_update_ctrl(_chandle);
611 g_signal_connect(G_OBJECT(_chandle), "request",
612 G_CALLBACK(sp_sel_trans_handle_request), (gpointer) &handle_center);
613 g_signal_connect(G_OBJECT(_chandle), "moved",
614 G_CALLBACK(sp_sel_trans_handle_new_event), (gpointer) &handle_center);
615 g_signal_connect(G_OBJECT(_chandle), "grabbed",
616 G_CALLBACK(sp_sel_trans_handle_grab), (gpointer) &handle_center);
617 g_signal_connect(G_OBJECT(_chandle), "ungrabbed",
618 G_CALLBACK(sp_sel_trans_handle_ungrab), (gpointer) &handle_center);
619 g_signal_connect(G_OBJECT(_chandle), "clicked",
620 G_CALLBACK(sp_sel_trans_handle_click), (gpointer) &handle_center);
621 }
623 sp_remove_handles(&_chandle, 1);
624 if ( _state == STATE_SCALE ) {
625 sp_remove_handles(_rhandle, 8);
626 _showHandles(_shandle, handles_scale, 8,
627 _("<b>Squeeze or stretch</b> selection; with <b>Ctrl</b> to scale uniformly; with <b>Shift</b> to scale around rotation center"),
628 _("<b>Scale</b> selection; with <b>Ctrl</b> to scale uniformly; with <b>Shift</b> to scale around rotation center"));
629 } else {
630 sp_remove_handles(_shandle, 8);
631 _showHandles(_rhandle, handles_rotate, 8,
632 _("<b>Skew</b> selection; with <b>Ctrl</b> to snap angle; with <b>Shift</b> to skew around the opposite side"),
633 _("<b>Rotate</b> selection; with <b>Ctrl</b> to snap angle; with <b>Shift</b> to rotate around the opposite corner"));
634 }
636 if (!_center_is_set) {
637 _center = _desktop->selection->center();
638 _center_is_set = true;
639 }
641 if ( _state == STATE_SCALE || !_center ) {
642 sp_knot_hide(_chandle);
643 } else {
644 sp_knot_show(_chandle);
645 sp_knot_moveto(_chandle, *_center);
646 }
647 }
649 void Inkscape::SelTrans::_updateVolatileState()
650 {
651 Inkscape::Selection *selection = sp_desktop_selection(_desktop);
652 _empty = selection->isEmpty();
654 if (_empty) {
655 return;
656 }
658 //Update the bboxes
659 _bbox = selection->bounds(_snap_bbox_type);
660 _approximate_bbox = selection->bounds(SPItem::APPROXIMATE_BBOX);
662 if (!_bbox) {
663 _empty = true;
664 return;
665 }
667 _strokewidth = stroke_average_width (selection->itemList());
668 }
670 static void sp_remove_handles(SPKnot *knot[], gint num)
671 {
672 for (int i = 0; i < num; i++) {
673 if (knot[i] != NULL) {
674 sp_knot_hide(knot[i]);
675 }
676 }
677 }
679 void Inkscape::SelTrans::_showHandles(SPKnot *knot[], SPSelTransHandle const handle[], gint num,
680 gchar const *even_tip, gchar const *odd_tip)
681 {
682 g_return_if_fail( !_empty );
684 for (int i = 0; i < num; i++) {
685 if (knot[i] == NULL) {
686 knot[i] = sp_knot_new(_desktop, i % 2 ? even_tip : odd_tip);
688 knot[i]->setShape (SP_CTRL_SHAPE_BITMAP);
689 knot[i]->setSize (13);
690 knot[i]->setAnchor (handle[i].anchor);
691 knot[i]->setMode (SP_CTRL_MODE_XOR);
692 knot[i]->setFill(0x000000ff, 0x00ff6600, 0x00ff6600); // inversion, green, green
693 knot[i]->setStroke(0x000000ff, 0x000000ff, 0x000000ff); // inversion
694 knot[i]->setPixbuf(handles[handle[i].control]);
695 sp_knot_update_ctrl(knot[i]);
697 g_signal_connect(G_OBJECT(knot[i]), "request",
698 G_CALLBACK(sp_sel_trans_handle_request), (gpointer) &handle[i]);
699 g_signal_connect(G_OBJECT(knot[i]), "moved",
700 G_CALLBACK(sp_sel_trans_handle_new_event), (gpointer) &handle[i]);
701 g_signal_connect(G_OBJECT(knot[i]), "grabbed",
702 G_CALLBACK(sp_sel_trans_handle_grab), (gpointer) &handle[i]);
703 g_signal_connect(G_OBJECT(knot[i]), "ungrabbed",
704 G_CALLBACK(sp_sel_trans_handle_ungrab), (gpointer) &handle[i]);
705 g_signal_connect(G_OBJECT(knot[i]), "event", G_CALLBACK(sp_seltrans_handle_event), (gpointer) &handle[i]);
706 }
707 sp_knot_show(knot[i]);
709 Geom::Point const handle_pt(handle[i].x, handle[i].y);
710 // shouldn't have nullary bbox, but knots
711 g_assert(_bbox);
712 Geom::Point p( _bbox->min()
713 + ( _bbox->dimensions()
714 * Geom::Scale(handle_pt) ) );
716 sp_knot_moveto(knot[i], p);
717 }
718 }
720 static void sp_sel_trans_handle_grab(SPKnot *knot, guint state, gpointer data)
721 {
722 SP_SELECT_CONTEXT(knot->desktop->event_context)->_seltrans->handleGrab(
723 knot, state, *(SPSelTransHandle const *) data
724 );
725 }
727 static void sp_sel_trans_handle_ungrab(SPKnot *knot, guint /*state*/, gpointer /*data*/)
728 {
729 SP_SELECT_CONTEXT(knot->desktop->event_context)->_seltrans->ungrab();
730 }
732 static void sp_sel_trans_handle_new_event(SPKnot *knot, Geom::Point *position, guint state, gpointer data)
733 {
734 SP_SELECT_CONTEXT(knot->desktop->event_context)->_seltrans->handleNewEvent(
735 knot, position, state, *(SPSelTransHandle const *) data
736 );
737 }
739 static gboolean sp_sel_trans_handle_request(SPKnot *knot, Geom::Point *position, guint state, gboolean *data)
740 {
741 return SP_SELECT_CONTEXT(knot->desktop->event_context)->_seltrans->handleRequest(
742 knot, position, state, *(SPSelTransHandle const *) data
743 );
744 }
746 static void sp_sel_trans_handle_click(SPKnot *knot, guint state, gpointer data)
747 {
748 SP_SELECT_CONTEXT(knot->desktop->event_context)->_seltrans->handleClick(
749 knot, state, *(SPSelTransHandle const *) data
750 );
751 }
753 void Inkscape::SelTrans::handleClick(SPKnot */*knot*/, guint state, SPSelTransHandle const &handle)
754 {
755 switch (handle.anchor) {
756 case GTK_ANCHOR_CENTER:
757 if (state & GDK_SHIFT_MASK) {
758 // Unset the center position for all selected items
759 for (GSList const *l = _desktop->selection->itemList(); l; l = l->next) {
760 SPItem *it = (SPItem*)(SP_OBJECT(l->data));
761 it->unsetCenter();
762 SP_OBJECT(it)->updateRepr();
763 _center_is_set = false; // center has changed
764 _updateHandles();
765 }
766 sp_document_done (sp_desktop_document(_desktop), SP_VERB_CONTEXT_SELECT,
767 _("Reset center"));
768 }
769 break;
770 default:
771 break;
772 }
773 }
775 void Inkscape::SelTrans::handleGrab(SPKnot *knot, guint /*state*/, SPSelTransHandle const &handle)
776 {
777 switch (handle.anchor) {
778 case GTK_ANCHOR_CENTER:
779 g_object_set(G_OBJECT(_grip),
780 "shape", SP_CTRL_SHAPE_BITMAP,
781 "size", 13.0,
782 NULL);
783 sp_canvas_item_show(_grip);
784 break;
785 default:
786 g_object_set(G_OBJECT(_grip),
787 "shape", SP_CTRL_SHAPE_CROSS,
788 "size", 7.0,
789 NULL);
790 sp_canvas_item_show(_norm);
791 sp_canvas_item_show(_grip);
793 break;
794 }
796 grab(sp_knot_position(knot), handle.x, handle.y, FALSE);
797 }
800 void Inkscape::SelTrans::handleNewEvent(SPKnot *knot, Geom::Point *position, guint state, SPSelTransHandle const &handle)
801 {
802 if (!SP_KNOT_IS_GRABBED(knot)) {
803 return;
804 }
806 // in case items have been unhooked from the document, don't
807 // try to continue processing events for them.
808 for (unsigned int i = 0; i < _items.size(); i++) {
809 if (!SP_OBJECT_DOCUMENT(SP_OBJECT(_items[i])) ) {
810 return;
811 }
812 }
814 handle.action(this, handle, *position, state);
815 }
818 gboolean Inkscape::SelTrans::handleRequest(SPKnot *knot, Geom::Point *position, guint state, SPSelTransHandle const &handle)
819 {
820 if (!SP_KNOT_IS_GRABBED(knot)) {
821 return TRUE;
822 }
824 knot->desktop->setPosition(*position);
826 // When holding shift while rotating or skewing, the transformation will be
827 // relative to the point opposite of the handle; otherwise it will be relative
828 // to the center as set for the selection
829 if ((!(state & GDK_SHIFT_MASK) == !(_state == STATE_ROTATE)) && (&handle != &handle_center)) {
830 _origin = _opposite;
831 _origin_for_bboxpoints = _opposite_for_bboxpoints;
832 _origin_for_specpoints = _opposite_for_specpoints;
833 } else if (_center) {
834 _origin = *_center;
835 _origin_for_bboxpoints = *_center;
836 _origin_for_specpoints = *_center;
837 } else {
838 // FIXME
839 return TRUE;
840 }
841 if (handle.request(this, handle, *position, state)) {
842 sp_knot_set_position(knot, *position, state);
843 SP_CTRL(_grip)->moveto(*position);
844 SP_CTRL(_norm)->moveto(_origin);
845 }
847 return TRUE;
848 }
851 void Inkscape::SelTrans::_selChanged(Inkscape::Selection */*selection*/)
852 {
853 if (!_grabbed) {
854 Inkscape::Preferences *prefs = Inkscape::Preferences::get();
855 // reread in case it changed on the fly:
856 int prefs_bbox = prefs->getBool("/tools/bounding_box");
857 _snap_bbox_type = !prefs_bbox ?
858 SPItem::APPROXIMATE_BBOX : SPItem::GEOMETRIC_BBOX;
859 //SPItem::APPROXIMATE_BBOX will be replaced by SPItem::VISUAL_BBOX, as soon as the latter is implemented properly
861 _updateVolatileState();
862 _current_relative_affine.setIdentity();
863 _center_is_set = false; // center(s) may have changed
864 _updateHandles();
865 }
866 }
868 void Inkscape::SelTrans::_selModified(Inkscape::Selection */*selection*/, guint /*flags*/)
869 {
870 if (!_grabbed) {
871 _updateVolatileState();
872 _current_relative_affine.setIdentity();
874 // reset internal flag
875 _changed = false;
877 _center_is_set = false; // center(s) may have changed
879 _updateHandles();
880 }
881 }
883 /*
884 * handlers for handle move-request
885 */
887 /** Returns -1 or 1 according to the sign of x. Returns 1 for 0 and NaN. */
888 static double sign(double const x)
889 {
890 return ( x < 0
891 ? -1
892 : 1 );
893 }
895 gboolean sp_sel_trans_scale_request(Inkscape::SelTrans *seltrans,
896 SPSelTransHandle const &, Geom::Point &pt, guint state)
897 {
898 return seltrans->scaleRequest(pt, state);
899 }
901 gboolean sp_sel_trans_stretch_request(Inkscape::SelTrans *seltrans,
902 SPSelTransHandle const &handle, Geom::Point &pt, guint state)
903 {
904 return seltrans->stretchRequest(handle, pt, state);
905 }
907 gboolean sp_sel_trans_skew_request(Inkscape::SelTrans *seltrans,
908 SPSelTransHandle const &handle, Geom::Point &pt, guint state)
909 {
910 return seltrans->skewRequest(handle, pt, state);
911 }
913 gboolean sp_sel_trans_rotate_request(Inkscape::SelTrans *seltrans,
914 SPSelTransHandle const &, Geom::Point &pt, guint state)
915 {
916 return seltrans->rotateRequest(pt, state);
917 }
919 gboolean sp_sel_trans_center_request(Inkscape::SelTrans *seltrans,
920 SPSelTransHandle const &, Geom::Point &pt, guint state)
921 {
922 return seltrans->centerRequest(pt, state);
923 }
925 gboolean Inkscape::SelTrans::scaleRequest(Geom::Point &pt, guint state)
926 {
928 // Calculate the scale factors, which can be either visual or geometric
929 // depending on which type of bbox is currently being used (see preferences -> selector tool)
930 Geom::Scale default_scale = calcScaleFactors(_point, pt, _origin);
932 // Find the scale factors for the geometric bbox
933 Geom::Point pt_geom = _getGeomHandlePos(pt);
934 Geom::Scale geom_scale = calcScaleFactors(_point_geom, pt_geom, _origin_for_specpoints);
936 _absolute_affine = Geom::identity(); //Initialize the scaler
938 if (state & GDK_MOD1_MASK) { // scale by an integer multiplier/divider
939 // We're scaling either the visual or the geometric bbox here (see the comment above)
940 for ( unsigned int i = 0 ; i < 2 ; i++ ) {
941 if (fabs(default_scale[i]) > 1) {
942 default_scale[i] = round(default_scale[i]);
943 } else if (default_scale[i] != 0) {
944 default_scale[i] = 1/round(1/(MIN(default_scale[i], 10)));
945 }
946 }
947 // Update the knot position
948 pt = _calcAbsAffineDefault(default_scale);
949 // When scaling by an integer, snapping is not needed
950 } else {
951 // In all other cases we should try to snap now
952 SnapManager &m = _desktop->namedview->snap_manager;
953 m.setup(_desktop, false, _items_const);
955 Inkscape::SnappedPoint bb, sn;
956 Geom::Coord bd(NR_HUGE);
957 Geom::Coord sd(NR_HUGE);
959 if ((state & GDK_CONTROL_MASK) || _desktop->isToolboxButtonActive ("lock")) {
960 // Scale is locked to a 1:1 aspect ratio, so that s[X] must be made to equal s[Y].
961 //
962 // The aspect-ratio must be locked before snapping
963 if (fabs(default_scale[Geom::X]) > fabs(default_scale[Geom::Y])) {
964 default_scale[Geom::X] = fabs(default_scale[Geom::Y]) * sign(default_scale[Geom::X]);
965 geom_scale[Geom::X] = fabs(geom_scale[Geom::Y]) * sign(geom_scale[Geom::X]);
966 } else {
967 default_scale[Geom::Y] = fabs(default_scale[Geom::X]) * sign(default_scale[Geom::Y]);
968 geom_scale[Geom::Y] = fabs(geom_scale[Geom::X]) * sign(geom_scale[Geom::Y]);
969 }
971 // Snap along a suitable constraint vector from the origin.
972 bb = m.constrainedSnapScale(SnapPreferences::SNAPPOINT_BBOX, _bbox_points, _point, default_scale, _origin_for_bboxpoints);
973 sn = m.constrainedSnapScale(SnapPreferences::SNAPPOINT_NODE, _snap_points, _point, geom_scale, _origin_for_specpoints);
975 /* Choose the smaller difference in scale. Since s[X] == s[Y] we can
976 ** just compare difference in s[X].
977 */
978 bd = bb.getSnapped() ? fabs(bb.getTransformation()[Geom::X] - default_scale[Geom::X]) : NR_HUGE;
979 sd = sn.getSnapped() ? fabs(sn.getTransformation()[Geom::X] - geom_scale[Geom::X]) : NR_HUGE;
980 } else {
981 /* Scale aspect ratio is unlocked */
982 bb = m.freeSnapScale(SnapPreferences::SNAPPOINT_BBOX, _bbox_points, _point, default_scale, _origin_for_bboxpoints);
983 sn = m.freeSnapScale(SnapPreferences::SNAPPOINT_NODE, _snap_points, _point, geom_scale, _origin_for_specpoints);
985 /* Pick the snap that puts us closest to the original scale */
986 bd = bb.getSnapped() ? fabs(Geom::L2(bb.getTransformation()) - Geom::L2(Geom::Point(default_scale[Geom::X], default_scale[Geom::Y]))) : NR_HUGE;
987 sd = sn.getSnapped() ? fabs(Geom::L2(sn.getTransformation()) - Geom::L2(Geom::Point(geom_scale[Geom::X], geom_scale[Geom::Y]))) : NR_HUGE;
988 }
990 if (!(bb.getSnapped() || sn.getSnapped())) {
991 // We didn't snap at all! Don't update the handle position, just calculate the new transformation
992 _calcAbsAffineDefault(default_scale);
993 _desktop->snapindicator->remove_snaptarget();
994 } else if (bd < sd) {
995 // We snapped the bbox (which is either visual or geometric)
996 _desktop->snapindicator->set_new_snaptarget(bb);
997 default_scale = Geom::Scale(bb.getTransformation());
998 // Calculate the new transformation and update the handle position
999 pt = _calcAbsAffineDefault(default_scale);
1000 } else {
1001 _desktop->snapindicator->set_new_snaptarget(sn);
1002 // We snapped the special points (e.g. nodes), which are not at the visual bbox
1003 // The handle location however (pt) might however be at the visual bbox, so we
1004 // will have to calculate pt taking the stroke width into account
1005 geom_scale = Geom::Scale(sn.getTransformation());
1006 pt = _calcAbsAffineGeom(geom_scale);
1007 }
1008 }
1010 /* Status text */
1011 _message_context.setF(Inkscape::IMMEDIATE_MESSAGE,
1012 _("<b>Scale</b>: %0.2f%% x %0.2f%%; with <b>Ctrl</b> to lock ratio"),
1013 100 * _absolute_affine[0], 100 * _absolute_affine[3]);
1015 return TRUE;
1016 }
1018 gboolean Inkscape::SelTrans::stretchRequest(SPSelTransHandle const &handle, Geom::Point &pt, guint state)
1019 {
1020 Geom::Dim2 axis, perp;
1021 switch (handle.cursor) {
1022 case GDK_TOP_SIDE:
1023 case GDK_BOTTOM_SIDE:
1024 axis = Geom::Y;
1025 perp = Geom::X;
1026 break;
1027 case GDK_LEFT_SIDE:
1028 case GDK_RIGHT_SIDE:
1029 axis = Geom::X;
1030 perp = Geom::Y;
1031 break;
1032 default:
1033 g_assert_not_reached();
1034 return TRUE;
1035 };
1037 // Calculate the scale factors, which can be either visual or geometric
1038 // depending on which type of bbox is currently being used (see preferences -> selector tool)
1039 Geom::Scale default_scale = calcScaleFactors(_point, pt, _origin);
1040 default_scale[perp] = 1;
1042 // Find the scale factors for the geometric bbox
1043 Geom::Point pt_geom = _getGeomHandlePos(pt);
1044 Geom::Scale geom_scale = calcScaleFactors(_point_geom, pt_geom, _origin_for_specpoints);
1045 geom_scale[perp] = 1;
1047 _absolute_affine = Geom::identity(); //Initialize the scaler
1049 if (state & GDK_MOD1_MASK) { // stretch by an integer multiplier/divider
1050 if (fabs(default_scale[axis]) > 1) {
1051 default_scale[axis] = round(default_scale[axis]);
1052 } else if (default_scale[axis] != 0) {
1053 default_scale[axis] = 1/round(1/(MIN(default_scale[axis], 10)));
1054 }
1055 // Calculate the new transformation and update the handle position
1056 pt = _calcAbsAffineDefault(default_scale);
1057 // When stretching by an integer, snapping is not needed
1058 } else {
1059 // In all other cases we should try to snap now
1061 SnapManager &m = _desktop->namedview->snap_manager;
1062 m.setup(_desktop, false, _items_const);
1064 Inkscape::SnappedPoint bb, sn;
1065 g_assert(bb.getSnapped() == false); // Check initialization to catch any regression
1066 Geom::Coord bd(NR_HUGE);
1067 Geom::Coord sd(NR_HUGE);
1069 bool symmetrical = state & GDK_CONTROL_MASK;
1071 bb = m.constrainedSnapStretch(SnapPreferences::SNAPPOINT_BBOX, _bbox_points, _point, Geom::Coord(default_scale[axis]), _origin_for_bboxpoints, Geom::Dim2(axis), symmetrical);
1072 sn = m.constrainedSnapStretch(SnapPreferences::SNAPPOINT_NODE, _snap_points, _point, Geom::Coord(geom_scale[axis]), _origin_for_specpoints, Geom::Dim2(axis), symmetrical);
1074 if (bb.getSnapped()) {
1075 // We snapped the bbox (which is either visual or geometric)
1076 bd = fabs(bb.getTransformation()[axis] - default_scale[axis]);
1077 default_scale[axis] = bb.getTransformation()[axis];
1078 }
1080 if (sn.getSnapped()) {
1081 sd = fabs(sn.getTransformation()[axis] - geom_scale[axis]);
1082 geom_scale[axis] = sn.getTransformation()[axis];
1083 }
1085 if (symmetrical) {
1086 // on ctrl, apply symmetrical scaling instead of stretching
1087 // Preserve aspect ratio, but never flip in the dimension not being edited (by using fabs())
1088 default_scale[perp] = fabs(default_scale[axis]);
1089 geom_scale[perp] = fabs(geom_scale[axis]);
1090 }
1092 if (!(bb.getSnapped() || sn.getSnapped())) {
1093 // We didn't snap at all! Don't update the handle position, just calculate the new transformation
1094 _calcAbsAffineDefault(default_scale);
1095 _desktop->snapindicator->remove_snaptarget();
1096 } else if (bd < sd) {
1097 _desktop->snapindicator->set_new_snaptarget(bb);
1098 // Calculate the new transformation and update the handle position
1099 pt = _calcAbsAffineDefault(default_scale);
1100 } else {
1101 _desktop->snapindicator->set_new_snaptarget(sn);
1102 // We snapped the special points (e.g. nodes), which are not at the visual bbox
1103 // The handle location however (pt) might however be at the visual bbox, so we
1104 // will have to calculate pt taking the stroke width into account
1105 pt = _calcAbsAffineGeom(geom_scale);
1106 }
1107 }
1109 // status text
1110 _message_context.setF(Inkscape::IMMEDIATE_MESSAGE,
1111 _("<b>Scale</b>: %0.2f%% x %0.2f%%; with <b>Ctrl</b> to lock ratio"),
1112 100 * _absolute_affine[0], 100 * _absolute_affine[3]);
1114 return TRUE;
1115 }
1117 gboolean Inkscape::SelTrans::skewRequest(SPSelTransHandle const &handle, Geom::Point &pt, guint state)
1118 {
1119 /* When skewing (or rotating):
1120 * 1) the stroke width will not change. This makes life much easier because we don't have to
1121 * account for that (like for scaling or stretching). As a consequence, all points will
1122 * have the same origin for the transformation and for the snapping.
1123 * 2) When holding shift, the transformation will be relative to the point opposite of
1124 * the handle; otherwise it will be relative to the center as set for the selection
1125 */
1127 Geom::Dim2 dim_a;
1128 Geom::Dim2 dim_b;
1130 switch (handle.cursor) {
1131 case GDK_SB_H_DOUBLE_ARROW:
1132 dim_a = Geom::Y;
1133 dim_b = Geom::X;
1134 break;
1135 case GDK_SB_V_DOUBLE_ARROW:
1136 dim_a = Geom::X;
1137 dim_b = Geom::Y;
1138 break;
1139 default:
1140 g_assert_not_reached();
1141 abort();
1142 break;
1143 }
1145 Geom::Point const initial_delta = _point - _origin;
1147 if (fabs(initial_delta[dim_a]) < 1e-15) {
1148 return false;
1149 }
1151 // Calculate the scale factors, which can be either visual or geometric
1152 // depending on which type of bbox is currently being used (see preferences -> selector tool)
1153 Geom::Scale scale = calcScaleFactors(_point, pt, _origin, false);
1154 Geom::Scale skew = calcScaleFactors(_point, pt, _origin, true);
1155 scale[dim_b] = 1;
1156 skew[dim_b] = 1;
1158 if (fabs(scale[dim_a]) < 1) {
1159 // Prevent shrinking of the selected object, while allowing mirroring
1160 scale[dim_a] = sign(scale[dim_a]);
1161 } else {
1162 // Allow expanding of the selected object by integer multiples
1163 scale[dim_a] = floor(scale[dim_a] + 0.5);
1164 }
1166 double radians = atan(skew[dim_a] / scale[dim_a]);
1168 if (state & GDK_CONTROL_MASK) {
1169 Inkscape::Preferences *prefs = Inkscape::Preferences::get();
1170 // Snap to defined angle increments
1171 int snaps = prefs->getInt("/options/rotationsnapsperpi/value", 12);
1172 if (snaps) {
1173 double sections = floor(radians * snaps / M_PI + .5);
1174 if (fabs(sections) >= snaps / 2) {
1175 sections = sign(sections) * (snaps / 2 - 1);
1176 }
1177 radians = (M_PI / snaps) * sections;
1178 }
1179 skew[dim_a] = tan(radians) * scale[dim_a];
1180 } else {
1181 // Snap to objects, grids, guides
1183 SnapManager &m = _desktop->namedview->snap_manager;
1184 m.setup(_desktop, false, _items_const);
1186 Inkscape::Snapper::ConstraintLine const constraint(component_vectors[dim_b]);
1187 // When skewing, we cannot snap the corners of the bounding box, see the comment in "constrainedSnapSkew" for details
1188 Geom::Point const s(skew[dim_a], scale[dim_a]);
1189 Inkscape::SnappedPoint sn = m.constrainedSnapSkew(Inkscape::SnapPreferences::SNAPPOINT_NODE, _snap_points, _point, constraint, s, _origin, Geom::Dim2(dim_b));
1191 if (sn.getSnapped()) {
1192 // We snapped something, so change the skew to reflect it
1193 Geom::Coord const sd = sn.getSnapped() ? sn.getTransformation()[0] : NR_HUGE;
1194 _desktop->snapindicator->set_new_snaptarget(sn);
1195 skew[dim_a] = sd;
1196 } else {
1197 _desktop->snapindicator->remove_snaptarget();
1198 }
1199 }
1201 // Update the handle position
1202 pt[dim_b] = initial_delta[dim_a] * skew[dim_a] + _point[dim_b];
1203 pt[dim_a] = initial_delta[dim_a] * scale[dim_a] + _origin[dim_a];
1205 // Calculate the relative affine
1206 _relative_affine = Geom::identity();
1207 _relative_affine[2*dim_a + dim_a] = (pt[dim_a] - _origin[dim_a]) / initial_delta[dim_a];
1208 _relative_affine[2*dim_a + (dim_b)] = (pt[dim_b] - _point[dim_b]) / initial_delta[dim_a];
1209 _relative_affine[2*(dim_b) + (dim_a)] = 0;
1210 _relative_affine[2*(dim_b) + (dim_b)] = 1;
1212 for (int i = 0; i < 2; i++) {
1213 if (fabs(_relative_affine[3*i]) < 1e-15) {
1214 _relative_affine[3*i] = 1e-15;
1215 }
1216 }
1218 // Update the status text
1219 double degrees = mod360symm(Geom::rad_to_deg(radians));
1220 _message_context.setF(Inkscape::IMMEDIATE_MESSAGE,
1221 // TRANSLATORS: don't modify the first ";"
1222 // (it will NOT be displayed as ";" - only the second one will be)
1223 _("<b>Skew</b>: %0.2f°; with <b>Ctrl</b> to snap angle"),
1224 degrees);
1226 return TRUE;
1227 }
1229 gboolean Inkscape::SelTrans::rotateRequest(Geom::Point &pt, guint state)
1230 {
1231 /* When rotating (or skewing):
1232 * 1) the stroke width will not change. This makes life much easier because we don't have to
1233 * account for that (like for scaling or stretching). As a consequence, all points will
1234 * have the same origin for the transformation and for the snapping.
1235 * 2) When holding shift, the transformation will be relative to the point opposite of
1236 * the handle; otherwise it will be relative to the center as set for the selection
1237 */
1239 Inkscape::Preferences *prefs = Inkscape::Preferences::get();
1240 int snaps = prefs->getInt("/options/rotationsnapsperpi/value", 12);
1242 // rotate affine in rotate
1243 Geom::Point const d1 = _point - _origin;
1244 Geom::Point const d2 = pt - _origin;
1246 Geom::Coord const h1 = Geom::L2(d1); // initial radius
1247 if (h1 < 1e-15) return FALSE;
1248 Geom::Point q1 = d1 / h1; // normalized initial vector to handle
1249 Geom::Coord const h2 = Geom::L2(d2); // new radius
1250 if (fabs(h2) < 1e-15) return FALSE;
1251 Geom::Point q2 = d2 / h2; // normalized new vector to handle
1253 double radians;
1254 if (state & GDK_CONTROL_MASK) {
1255 // Snap to defined angle increments
1256 double cos_t = Geom::dot(q1, q2);
1257 double sin_t = Geom::dot(Geom::rot90(q1), q2);
1258 radians = atan2(sin_t, cos_t);
1259 if (snaps) {
1260 radians = ( M_PI / snaps ) * floor( radians * snaps / M_PI + .5 );
1261 }
1262 q1 = Geom::Point(1, 0);
1263 q2 = Geom::Point(cos(radians), sin(radians));
1264 } else {
1265 radians = atan2(Geom::dot(Geom::rot90(d1), d2),
1266 Geom::dot(d1, d2));
1267 }
1269 Geom::Rotate const r1(q1);
1270 Geom::Rotate const r2(q2);
1272 // Calculate the relative affine
1273 _relative_affine = r2 * r1.inverse();
1275 // Update the handle position
1276 pt = _point * Geom::Translate(-_origin) * _relative_affine * Geom::Translate(_origin);
1278 // Update the status text
1279 double degrees = mod360symm(Geom::rad_to_deg(radians));
1280 _message_context.setF(Inkscape::IMMEDIATE_MESSAGE,
1281 // TRANSLATORS: don't modify the first ";"
1282 // (it will NOT be displayed as ";" - only the second one will be)
1283 _("<b>Rotate</b>: %0.2f°; with <b>Ctrl</b> to snap angle"), degrees);
1285 return TRUE;
1286 }
1288 // Move the item's transformation center
1289 gboolean Inkscape::SelTrans::centerRequest(Geom::Point &pt, guint state)
1290 {
1291 SnapManager &m = _desktop->namedview->snap_manager;
1292 m.setup(_desktop);
1293 m.freeSnapReturnByRef(SnapPreferences::SNAPPOINT_NODE, pt, Inkscape::SNAPSOURCE_HANDLE);
1295 if (state & GDK_CONTROL_MASK) {
1296 if ( fabs(_point[Geom::X] - pt[Geom::X]) > fabs(_point[Geom::Y] - pt[Geom::Y]) ) {
1297 pt[Geom::Y] = _point[Geom::Y];
1298 } else {
1299 pt[Geom::X] = _point[Geom::X];
1300 }
1301 }
1303 if ( !(state & GDK_SHIFT_MASK) && _bbox ) {
1304 // screen pixels to snap center to bbox
1305 #define SNAP_DIST 5
1306 // FIXME: take from prefs
1307 double snap_dist = SNAP_DIST / _desktop->current_zoom();
1309 for (int i = 0; i < 2; i++) {
1310 if (fabs(pt[i] - _bbox->min()[i]) < snap_dist) {
1311 pt[i] = _bbox->min()[i];
1312 }
1313 if (fabs(pt[i] - _bbox->midpoint()[i]) < snap_dist) {
1314 pt[i] = _bbox->midpoint()[i];
1315 }
1316 if (fabs(pt[i] - _bbox->max()[i]) < snap_dist) {
1317 pt[i] = _bbox->max()[i];
1318 }
1319 }
1320 }
1322 // status text
1323 GString *xs = SP_PX_TO_METRIC_STRING(pt[Geom::X], _desktop->namedview->getDefaultMetric());
1324 GString *ys = SP_PX_TO_METRIC_STRING(pt[Geom::Y], _desktop->namedview->getDefaultMetric());
1325 _message_context.setF(Inkscape::NORMAL_MESSAGE, _("Move <b>center</b> to %s, %s"), xs->str, ys->str);
1326 g_string_free(xs, FALSE);
1327 g_string_free(ys, FALSE);
1329 return TRUE;
1330 }
1332 /*
1333 * handlers for handle movement
1334 *
1335 */
1337 void sp_sel_trans_stretch(Inkscape::SelTrans *seltrans, SPSelTransHandle const &handle, Geom::Point &pt, guint state)
1338 {
1339 seltrans->stretch(handle, pt, state);
1340 }
1342 void sp_sel_trans_scale(Inkscape::SelTrans *seltrans, SPSelTransHandle const &, Geom::Point &pt, guint state)
1343 {
1344 seltrans->scale(pt, state);
1345 }
1347 void sp_sel_trans_skew(Inkscape::SelTrans *seltrans, SPSelTransHandle const &handle, Geom::Point &pt, guint state)
1348 {
1349 seltrans->skew(handle, pt, state);
1350 }
1352 void sp_sel_trans_rotate(Inkscape::SelTrans *seltrans, SPSelTransHandle const &, Geom::Point &pt, guint state)
1353 {
1354 seltrans->rotate(pt, state);
1355 }
1357 void Inkscape::SelTrans::stretch(SPSelTransHandle const &/*handle*/, Geom::Point &/*pt*/, guint /*state*/)
1358 {
1359 transform(_absolute_affine, Geom::Point(0, 0)); // we have already accounted for origin, so pass 0,0
1360 }
1362 void Inkscape::SelTrans::scale(Geom::Point &/*pt*/, guint /*state*/)
1363 {
1364 transform(_absolute_affine, Geom::Point(0, 0)); // we have already accounted for origin, so pass 0,0
1365 }
1367 void Inkscape::SelTrans::skew(SPSelTransHandle const &/*handle*/, Geom::Point &/*pt*/, guint /*state*/)
1368 {
1369 transform(_relative_affine, _origin);
1370 }
1372 void Inkscape::SelTrans::rotate(Geom::Point &/*pt*/, guint /*state*/)
1373 {
1374 transform(_relative_affine, _origin);
1375 }
1377 void sp_sel_trans_center(Inkscape::SelTrans *seltrans, SPSelTransHandle const &, Geom::Point &pt, guint /*state*/)
1378 {
1379 seltrans->setCenter(pt);
1380 }
1383 void Inkscape::SelTrans::moveTo(Geom::Point const &xy, guint state)
1384 {
1385 SnapManager &m = _desktop->namedview->snap_manager;
1387 /* The amount that we've moved by during this drag */
1388 Geom::Point dxy = xy - _point;
1390 bool const alt = (state & GDK_MOD1_MASK);
1391 bool const control = (state & GDK_CONTROL_MASK);
1392 bool const shift = (state & GDK_SHIFT_MASK);
1394 if (alt) {
1396 /* Alt pressed means keep offset: snap the moved distance to the grid.
1397 ** FIXME: this will snap to more than just the grid, nowadays.
1398 */
1400 m.setup(_desktop, true, _items_const);
1401 m.freeSnapReturnByRef(SnapPreferences::SNAPPOINT_NODE, dxy, Inkscape::SNAPSOURCE_UNDEFINED);
1403 } else if (shift) {
1404 if (control) { // shift & control: constrained movement without snapping
1405 if (fabs(dxy[Geom::X]) > fabs(dxy[Geom::Y])) {
1406 dxy[Geom::Y] = 0;
1407 } else {
1408 dxy[Geom::X] = 0;
1409 }
1410 }
1411 } else { //!shift: with snapping
1413 /* We're snapping to things, possibly with a constraint to horizontal or
1414 ** vertical movement. Obtain a list of possible translations and then
1415 ** pick the smallest.
1416 */
1418 m.setup(_desktop, false, _items_const);
1420 /* This will be our list of possible translations */
1421 std::list<Inkscape::SnappedPoint> s;
1423 if (control) { // constrained movement with snapping
1425 /* Snap to things, and also constrain to horizontal or vertical movement */
1427 unsigned int dim = fabs(dxy[Geom::X]) > fabs(dxy[Geom::Y]) ? Geom::X : Geom::Y;
1428 // When doing a constrained translation, all points will move in the same direction, i.e.
1429 // either horizontally or vertically. Therefore we only have to specify the direction of
1430 // the constraint-line once. The constraint lines are parallel, but might not be colinear.
1431 // Therefore we will have to set the point through which the constraint-line runs
1432 // individually for each point to be snapped; this will be handled however by _snapTransformed()
1433 s.push_back(m.constrainedSnapTranslation(Inkscape::SnapPreferences::SNAPPOINT_BBOX,
1434 _bbox_points,
1435 _point,
1436 Inkscape::Snapper::ConstraintLine(component_vectors[dim]),
1437 dxy));
1439 s.push_back(m.constrainedSnapTranslation(Inkscape::SnapPreferences::SNAPPOINT_NODE,
1440 _snap_points,
1441 _point,
1442 Inkscape::Snapper::ConstraintLine(component_vectors[dim]),
1443 dxy));
1444 } else { // !control
1446 // Let's leave this timer code here for a while. I'll probably need it in the near future (Diederik van Lierop)
1447 /* GTimeVal starttime;
1448 GTimeVal endtime;
1449 g_get_current_time(&starttime); */
1451 /* Snap to things with no constraint */
1452 s.push_back(m.freeSnapTranslation(Inkscape::SnapPreferences::SNAPPOINT_BBOX, _bbox_points, _point, dxy));
1453 s.push_back(m.freeSnapTranslation(Inkscape::SnapPreferences::SNAPPOINT_NODE, _snap_points, _point, dxy));
1455 /*g_get_current_time(&endtime);
1456 double elapsed = ((((double)endtime.tv_sec - starttime.tv_sec) * G_USEC_PER_SEC + (endtime.tv_usec - starttime.tv_usec))) / 1000.0;
1457 std::cout << "Time spent snapping: " << elapsed << std::endl; */
1458 }
1460 /* Pick one */
1461 Inkscape::SnappedPoint best_snapped_point;
1462 for (std::list<Inkscape::SnappedPoint>::const_iterator i = s.begin(); i != s.end(); i++) {
1463 if (i->getSnapped()) {
1464 if (best_snapped_point.isOtherSnapBetter(*i, true)) {
1465 best_snapped_point = *i;
1466 dxy = i->getTransformation();
1467 }
1468 }
1469 }
1470 if (best_snapped_point.getSnapped()) {
1471 _desktop->snapindicator->set_new_snaptarget(best_snapped_point);
1472 } else {
1473 // We didn't snap, so remove any previous snap indicator
1474 _desktop->snapindicator->remove_snaptarget();
1475 if (control) {
1476 // If we didn't snap, then we should still constrain horizontally or vertically
1477 // (When we did snap, then this constraint has already been enforced by
1478 // calling constrainedSnapTranslation() above)
1479 if (fabs(dxy[Geom::X]) > fabs(dxy[Geom::Y])) {
1480 dxy[Geom::Y] = 0;
1481 } else {
1482 dxy[Geom::X] = 0;
1483 }
1484 }
1485 }
1486 }
1488 Geom::Matrix const move((Geom::Translate(dxy)));
1489 Geom::Point const norm(0, 0);
1490 transform(move, norm);
1492 // status text
1493 GString *xs = SP_PX_TO_METRIC_STRING(dxy[Geom::X], _desktop->namedview->getDefaultMetric());
1494 GString *ys = SP_PX_TO_METRIC_STRING(dxy[Geom::Y], _desktop->namedview->getDefaultMetric());
1495 _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);
1496 g_string_free(xs, TRUE);
1497 g_string_free(ys, TRUE);
1498 }
1500 // Given a location of a handle at the visual bounding box, find the corresponding location at the
1501 // geometrical bounding box
1502 Geom::Point Inkscape::SelTrans::_getGeomHandlePos(Geom::Point const &visual_handle_pos)
1503 {
1504 if ( _snap_bbox_type == SPItem::GEOMETRIC_BBOX) {
1505 // When the selector tool is using geometric bboxes, then the handle is already
1506 // located at one of the geometric bbox corners
1507 return visual_handle_pos;
1508 }
1510 if (!_geometric_bbox) {
1511 //_getGeomHandlePos() can only be used after _geometric_bbox has been defined!
1512 return visual_handle_pos;
1513 }
1515 // Using the Geom::Rect constructor below ensures that "min() < max()", which is important
1516 // because this will also hold for _bbox, and which is required for get_scale_transform_with_stroke()
1517 Geom::Rect new_bbox = Geom::Rect(_origin_for_bboxpoints, visual_handle_pos); // new visual bounding box
1518 // Please note that the new_bbox might in fact be just a single line, for example when stretching (in
1519 // which case the handle and origin will be aligned vertically or horizontally)
1520 Geom::Point normalized_handle_pos = (visual_handle_pos - new_bbox.min()) * Geom::Scale(new_bbox.dimensions()).inverse();
1522 // Calculate the absolute affine while taking into account the scaling of the stroke width
1523 Inkscape::Preferences *prefs = Inkscape::Preferences::get();
1524 bool transform_stroke = prefs->getBool("/options/transform/stroke", true);
1525 Geom::Matrix abs_affine = get_scale_transform_with_stroke (*_bbox, _strokewidth, transform_stroke,
1526 new_bbox.min()[Geom::X], new_bbox.min()[Geom::Y], new_bbox.max()[Geom::X], new_bbox.max()[Geom::Y]);
1528 // Calculate the scaled geometrical bbox
1529 Geom::Rect new_geom_bbox = Geom::Rect(_geometric_bbox->min() * abs_affine, _geometric_bbox->max() * abs_affine);
1530 // Find the location of the handle on this new geometrical bbox
1531 return normalized_handle_pos * Geom::Scale(new_geom_bbox.dimensions()) + new_geom_bbox.min(); //new position of the geometric handle
1532 }
1534 Geom::Scale Inkscape::calcScaleFactors(Geom::Point const &initial_point, Geom::Point const &new_point, Geom::Point const &origin, bool const skew)
1535 {
1536 // Work out the new scale factors for the bbox
1538 Geom::Point const initial_delta = initial_point - origin;
1539 Geom::Point const new_delta = new_point - origin;
1540 Geom::Point const offset = new_point - initial_point;
1541 Geom::Scale scale(1, 1);
1543 for ( unsigned int i = 0 ; i < 2 ; i++ ) {
1544 if ( fabs(initial_delta[i]) > 1e-6 ) {
1545 if (skew) {
1546 scale[i] = offset[1-i] / initial_delta[i];
1547 } else {
1548 scale[i] = new_delta[i] / initial_delta[i];
1549 }
1550 }
1551 }
1553 return scale;
1554 }
1556 // Only for scaling/stretching
1557 Geom::Point Inkscape::SelTrans::_calcAbsAffineDefault(Geom::Scale const default_scale)
1558 {
1559 Geom::Matrix abs_affine = Geom::Translate(-_origin) * Geom::Matrix(default_scale) * Geom::Translate(_origin);
1560 Geom::Point new_bbox_min = _approximate_bbox->min() * abs_affine;
1561 Geom::Point new_bbox_max = _approximate_bbox->max() * abs_affine;
1563 bool transform_stroke = false;
1564 gdouble strokewidth = 0;
1566 if ( _snap_bbox_type != SPItem::GEOMETRIC_BBOX) {
1567 Inkscape::Preferences *prefs = Inkscape::Preferences::get();
1568 transform_stroke = prefs->getBool("/options/transform/stroke", true);
1569 strokewidth = _strokewidth;
1570 }
1572 _absolute_affine = get_scale_transform_with_stroke (*_approximate_bbox, strokewidth, transform_stroke,
1573 new_bbox_min[Geom::X], new_bbox_min[Geom::Y], new_bbox_max[Geom::X], new_bbox_max[Geom::Y]);
1575 // return the new handle position
1576 return ( _point - _origin ) * default_scale + _origin;
1577 }
1579 // Only for scaling/stretching
1580 Geom::Point Inkscape::SelTrans::_calcAbsAffineGeom(Geom::Scale const geom_scale)
1581 {
1582 _relative_affine = Geom::Matrix(geom_scale);
1583 _absolute_affine = Geom::Translate(-_origin_for_specpoints) * _relative_affine * Geom::Translate(_origin_for_specpoints);
1585 Inkscape::Preferences *prefs = Inkscape::Preferences::get();
1586 bool const transform_stroke = prefs->getBool("/options/transform/stroke", true);
1587 Geom::Rect visual_bbox = get_visual_bbox(_geometric_bbox, _absolute_affine, _strokewidth, transform_stroke);
1589 // return the new handle position
1590 return visual_bbox.min() + visual_bbox.dimensions() * Geom::Scale(_handle_x, _handle_y);
1591 }
1593 void Inkscape::SelTrans::_keepClosestPointOnly(std::vector<std::pair<Geom::Point, int> > &points, const Geom::Point &reference)
1594 {
1595 if (points.size() < 2) return;
1597 std::pair<Geom::Point, int> closest_point = std::make_pair(Geom::Point(NR_HUGE, NR_HUGE), SNAPSOURCE_UNDEFINED);
1598 Geom::Coord closest_dist = NR_HUGE;
1600 for(std::vector<std::pair<Geom::Point, int> >::const_iterator i = points.begin(); i != points.end(); i++) {
1601 Geom::Coord dist = Geom::L2((*i).first - reference);
1602 if (i == points.begin() || dist < closest_dist) {
1603 closest_point = *i;
1604 closest_dist = dist;
1605 }
1606 }
1608 points.clear();
1609 points.push_back(closest_point);
1610 }
1612 /*
1613 Local Variables:
1614 mode:c++
1615 c-file-style:"stroustrup"
1616 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
1617 indent-tabs-mode:nil
1618 fill-column:99
1619 End:
1620 */
1621 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :