1 #define __SELTRANS_C__
3 /*
4 * Helper object for transforming selected items
5 *
6 * Author:
7 * Lauris Kaplinski <lauris@kaplinski.com>
8 * bulia byak <buliabyak@users.sf.net>
9 * Carl Hetherington <inkscape@carlh.net>
10 *
11 * Copyright (C) 1999-2002 Lauris Kaplinski
12 *
13 * Released under GNU GPL, read the file 'COPYING' for more information
14 */
16 #ifdef HAVE_CONFIG_H
17 # include <config.h>
18 #endif
20 #include <libnr/nr-matrix-ops.h>
21 #include <libnr/nr-matrix-translate-ops.h>
22 #include <libnr/nr-rotate-ops.h>
23 #include <libnr/nr-scale-ops.h>
24 #include <libnr/nr-translate-matrix-ops.h>
25 #include <libnr/nr-translate-ops.h>
26 #include <gdk/gdkkeysyms.h>
27 #include "document.h"
28 #include "sp-namedview.h"
29 #include "desktop.h"
30 #include "desktop-handles.h"
31 #include "desktop-style.h"
32 #include "knot.h"
33 #include "snap.h"
34 #include "selection.h"
35 #include "select-context.h"
36 #include "sp-item.h"
37 #include "sp-item-transform.h"
38 #include "seltrans-handles.h"
39 #include "seltrans.h"
40 #include "selection-chemistry.h"
41 #include "sp-metrics.h"
42 #include "verbs.h"
43 #include <glibmm/i18n.h>
44 #include "display/sp-ctrlline.h"
45 #include "prefs-utils.h"
46 #include "xml/repr.h"
48 #include "isnan.h" //temp fix. make sure included last
50 static void sp_remove_handles(SPKnot *knot[], gint num);
52 static void sp_sel_trans_handle_grab(SPKnot *knot, guint state, gpointer data);
53 static void sp_sel_trans_handle_ungrab(SPKnot *knot, guint state, gpointer data);
54 static void sp_sel_trans_handle_click(SPKnot *knot, guint state, gpointer data);
55 static void sp_sel_trans_handle_new_event(SPKnot *knot, NR::Point *position, guint32 state, gpointer data);
56 static gboolean sp_sel_trans_handle_request(SPKnot *knot, NR::Point *p, guint state, gboolean *data);
58 extern GdkPixbuf *handles[];
60 static gboolean sp_seltrans_handle_event(SPKnot *knot, GdkEvent *event, gpointer)
61 {
62 switch (event->type) {
63 case GDK_MOTION_NOTIFY:
64 break;
65 case GDK_KEY_PRESS:
66 if (get_group0_keyval (&event->key) == GDK_space) {
67 /* stamping mode: both mode(show content and outline) operation with knot */
68 if (!SP_KNOT_IS_GRABBED(knot)) {
69 return FALSE;
70 }
71 SPDesktop *desktop = knot->desktop;
72 Inkscape::SelTrans *seltrans = SP_SELECT_CONTEXT(desktop->event_context)->_seltrans;
73 seltrans->stamp();
74 return TRUE;
75 }
76 break;
77 default:
78 break;
79 }
81 return FALSE;
82 }
84 Inkscape::SelTrans::SelTrans(SPDesktop *desktop) :
85 _desktop(desktop),
86 _selcue(desktop),
87 _state(STATE_SCALE),
88 _show(SHOW_CONTENT),
89 _grabbed(false),
90 _show_handles(true),
91 _bbox(NR::Nothing()),
92 _approximate_bbox(NR::Nothing()),
93 _chandle(NULL),
94 _stamp_cache(NULL),
95 _message_context(desktop->messageStack())
96 {
97 gchar const *prefs_bbox = prefs_get_string_attribute("tools.select", "bounding_box");
98 _snap_bbox_type = (prefs_bbox != NULL && strcmp(prefs_bbox, "geometric")==0)? SPItem::GEOMETRIC_BBOX : SPItem::APPROXIMATE_BBOX;
100 g_return_if_fail(desktop != NULL);
102 for (int i = 0; i < 8; i++) {
103 _shandle[i] = NULL;
104 _rhandle[i] = NULL;
105 }
107 _updateVolatileState();
108 _current.set_identity();
110 _center_is_set = false; // reread _center from items, or set to bbox midpoint
112 _updateHandles();
114 _selection = sp_desktop_selection(desktop);
116 _norm = sp_canvas_item_new(sp_desktop_controls(desktop),
117 SP_TYPE_CTRL,
118 "anchor", GTK_ANCHOR_CENTER,
119 "mode", SP_CTRL_MODE_COLOR,
120 "shape", SP_CTRL_SHAPE_BITMAP,
121 "size", 13.0,
122 "filled", TRUE,
123 "fill_color", 0x00000000,
124 "stroked", TRUE,
125 "stroke_color", 0x000000a0,
126 "pixbuf", handles[12],
127 NULL);
129 _grip = sp_canvas_item_new(sp_desktop_controls(desktop),
130 SP_TYPE_CTRL,
131 "anchor", GTK_ANCHOR_CENTER,
132 "mode", SP_CTRL_MODE_XOR,
133 "shape", SP_CTRL_SHAPE_CROSS,
134 "size", 7.0,
135 "filled", TRUE,
136 "fill_color", 0xffffff7f,
137 "stroked", TRUE,
138 "stroke_color", 0xffffffff,
139 "pixbuf", handles[12],
140 NULL);
142 sp_canvas_item_hide(_grip);
143 sp_canvas_item_hide(_norm);
145 for (int i = 0; i < 4; i++) {
146 _l[i] = sp_canvas_item_new(sp_desktop_controls(desktop), SP_TYPE_CTRLLINE, NULL);
147 sp_canvas_item_hide(_l[i]);
148 }
150 _sel_changed_connection = _selection->connectChanged(
151 sigc::mem_fun(*this, &Inkscape::SelTrans::_selChanged)
152 );
154 _sel_modified_connection = _selection->connectModified(
155 sigc::mem_fun(*this, &Inkscape::SelTrans::_selModified)
156 );
157 }
159 Inkscape::SelTrans::~SelTrans()
160 {
161 _sel_changed_connection.disconnect();
162 _sel_modified_connection.disconnect();
164 for (unsigned int i = 0; i < 8; i++) {
165 if (_shandle[i]) {
166 g_object_unref(G_OBJECT(_shandle[i]));
167 _shandle[i] = NULL;
168 }
169 if (_rhandle[i]) {
170 g_object_unref(G_OBJECT(_rhandle[i]));
171 _rhandle[i] = NULL;
172 }
173 }
174 if (_chandle) {
175 g_object_unref(G_OBJECT(_chandle));
176 _chandle = NULL;
177 }
179 if (_norm) {
180 gtk_object_destroy(GTK_OBJECT(_norm));
181 _norm = NULL;
182 }
183 if (_grip) {
184 gtk_object_destroy(GTK_OBJECT(_grip));
185 _grip = NULL;
186 }
187 for (int i = 0; i < 4; i++) {
188 if (_l[i]) {
189 gtk_object_destroy(GTK_OBJECT(_l[i]));
190 _l[i] = NULL;
191 }
192 }
194 for (unsigned i = 0; i < _items.size(); i++) {
195 sp_object_unref(SP_OBJECT(_items[i].first), NULL);
196 }
198 _items.clear();
199 _items_centers.clear();
200 }
202 void Inkscape::SelTrans::resetState()
203 {
204 _state = STATE_SCALE;
205 }
207 void Inkscape::SelTrans::increaseState()
208 {
209 if (_state == STATE_SCALE) {
210 _state = STATE_ROTATE;
211 } else {
212 _state = STATE_SCALE;
213 }
215 _center_is_set = true; // no need to reread center
217 _updateHandles();
218 }
220 void Inkscape::SelTrans::setCenter(NR::Point const &p)
221 {
222 _center = p;
223 _center_is_set = true;
225 // Write the new center position into all selected items
226 for (GSList const *l = _desktop->selection->itemList(); l; l = l->next) {
227 SPItem *it = (SPItem*)SP_OBJECT(l->data);
228 it->setCenter(p);
229 // only set the value; updating repr and document_done will be done once, on ungrab
230 }
232 _updateHandles();
233 }
235 void Inkscape::SelTrans::grab(NR::Point const &p, gdouble x, gdouble y, bool show_handles)
236 {
237 Inkscape::Selection *selection = sp_desktop_selection(_desktop);
239 g_return_if_fail(!_grabbed);
241 _grabbed = true;
242 _show_handles = show_handles;
243 _updateVolatileState();
244 _current.set_identity();
246 _changed = false;
248 if (_empty) {
249 return;
250 }
252 for (GSList const *l = selection->itemList(); l; l = l->next) {
253 SPItem *it = (SPItem*)sp_object_ref(SP_OBJECT(l->data), NULL);
254 _items.push_back(std::pair<SPItem *, NR::Matrix>(it, sp_item_i2d_affine(it)));
255 _items_centers.push_back(std::pair<SPItem *, NR::Point>(it, it->getCenter())); // for content-dragging, we need to remember original centers
256 }
258 _current.set_identity();
260 _point = p;
262 // The selector tool should snap the bbox and the special snappoints, but not path nodes
263 // (The special points are the handles, center, rotation axis, font baseline, ends of spiral, etc.)
265 // First, determine the bounding box for snapping ...
266 _bbox = selection->bounds(_snap_bbox_type);
267 _approximate_bbox = selection->bounds(SPItem::APPROXIMATE_BBOX); // Used for correctly scaling the strokewidth
270 // Next, get all special points for snapping
271 _snap_points = selection->getSnapPoints(); // Excludes path nodes
272 std::vector<NR::Point> snap_points_hull = selection->getSnapPointsConvexHull(); // Includes path nodes
273 if (_snap_points.size() > 100) {
274 /* Snapping a huge number of nodes will take way too long, so limit the number of snappable nodes
275 An average user would rarely ever try to snap such a large number of nodes anyway, because
276 (s)he could hardly discern which node would be snapping */
277 _snap_points = snap_points_hull;
278 // Unfortunately, by now we will have lost the font-baseline snappoints :-(
279 }
281 // Find bbox hulling all special points, which excludes stroke width. Here we need to include the
282 // path nodes, for example because a rectangle which has been converted to a path doesn't have
283 // any other special points
284 NR::Rect snap_points_bbox;
285 if ( snap_points_hull.empty() == false ) {
286 std::vector<NR::Point>::iterator i = snap_points_hull.begin();
287 snap_points_bbox = NR::Rect(*i, *i);
288 i++;
289 while (i != snap_points_hull.end()) {
290 snap_points_bbox.expandTo(*i);
291 i++;
292 }
293 }
295 _bbox_points.clear();
296 if (_bbox) {
297 // ... and add the bbox corners to _bbox_points
298 for ( unsigned i = 0 ; i < 4 ; i++ ) {
299 _bbox_points.push_back(_bbox->corner(i));
300 }
301 // There are two separate "opposites" (i.e. opposite w.r.t. the handle being dragged):
302 // - one for snapping the boundingbox, which can be either visual or geometric
303 // - one for snapping the special points
304 // The "opposite" in case of a geometric boundingbox always coincides with the "opposite" for the special points
305 // These distinct "opposites" are needed in the snapmanager to avoid bugs such as #1540195 (in which
306 // a box is caught between to guides)
307 _opposite_for_bboxpoints = _bbox->min() + _bbox->dimensions() * NR::scale(1-x, 1-y);
308 _opposite_for_specpoints = (snap_points_bbox.min() + (snap_points_bbox.dimensions() * NR::scale(1-x, 1-y) ) );
309 // Only a single "opposite" can be used in calculating transformations.
310 _opposite = _opposite_for_bboxpoints;
311 }
313 /*std::cout << "Number of snap points: " << _snap_points.size() << std::endl;
314 for (std::vector<NR::Point>::const_iterator i = _snap_points.begin(); i != _snap_points.end(); i++)
315 {
316 std::cout << " " << *i << std::endl;
317 }
319 std::cout << "Number of bbox points: " << _bbox_points.size() << std::endl;
320 for (std::vector<NR::Point>::const_iterator i = _bbox_points.begin(); i != _bbox_points.end(); i++)
321 {
322 std::cout << " " << *i << std::endl;
323 }*/
325 if ((x != -1) && (y != -1)) {
326 sp_canvas_item_show(_norm);
327 sp_canvas_item_show(_grip);
328 }
330 if (_show == SHOW_OUTLINE) {
331 for (int i = 0; i < 4; i++)
332 sp_canvas_item_show(_l[i]);
333 }
335 _updateHandles();
336 g_return_if_fail(_stamp_cache == NULL);
337 }
339 void Inkscape::SelTrans::transform(NR::Matrix const &rel_affine, NR::Point const &norm)
340 {
341 g_return_if_fail(_grabbed);
342 g_return_if_fail(!_empty);
344 NR::Matrix const affine( NR::translate(-norm) * rel_affine * NR::translate(norm) );
346 if (_show == SHOW_CONTENT) {
347 // update the content
348 for (unsigned i = 0; i < _items.size(); i++) {
349 SPItem &item = *_items[i].first;
350 NR::Matrix const &prev_transform = _items[i].second;
351 sp_item_set_i2d_affine(&item, prev_transform * affine);
352 }
353 } else {
354 if (_bbox) {
355 NR::Point p[4];
356 /* update the outline */
357 for (unsigned i = 0 ; i < 4 ; i++) {
358 p[i] = _bbox->corner(i) * affine;
359 }
360 for (unsigned i = 0 ; i < 4 ; i++) {
361 sp_ctrlline_set_coords(SP_CTRLLINE(_l[i]), p[i], p[(i+1)%4]);
362 }
363 }
364 }
366 _current = affine;
367 _changed = true;
368 _updateHandles();
369 }
371 void Inkscape::SelTrans::ungrab()
372 {
373 g_return_if_fail(_grabbed);
374 _grabbed = false;
375 _show_handles = true;
377 Inkscape::Selection *selection = sp_desktop_selection(_desktop);
378 _updateVolatileState();
380 for (unsigned i = 0; i < _items.size(); i++) {
381 sp_object_unref(SP_OBJECT(_items[i].first), NULL);
382 }
384 sp_canvas_item_hide(_norm);
385 sp_canvas_item_hide(_grip);
387 if (_show == SHOW_OUTLINE) {
388 for (int i = 0; i < 4; i++)
389 sp_canvas_item_hide(_l[i]);
390 }
392 if (_stamp_cache) {
393 g_slist_free(_stamp_cache);
394 _stamp_cache = NULL;
395 }
397 _message_context.clear();
399 if (!_empty && _changed) {
400 sp_selection_apply_affine(selection, _current, (_show == SHOW_OUTLINE)? true : false);
401 if (_center) {
402 *_center *= _current;
403 _center_is_set = true;
404 }
406 // If dragging showed content live, sp_selection_apply_affine cannot change the centers
407 // appropriately - it does not know the original positions of the centers (all objects already have
408 // the new bboxes). So we need to reset the centers from our saved array.
409 if (_show != SHOW_OUTLINE && !_current.is_translation()) {
410 for (unsigned i = 0; i < _items_centers.size(); i++) {
411 SPItem *currentItem = _items_centers[i].first;
412 if (currentItem->isCenterSet()) { // only if it's already set
413 currentItem->setCenter (_items_centers[i].second * _current);
414 SP_OBJECT(currentItem)->updateRepr();
415 }
416 }
417 }
419 _items.clear();
420 _items_centers.clear();
422 if (_current.is_translation()) {
423 sp_document_done(sp_desktop_document(_desktop), SP_VERB_CONTEXT_SELECT,
424 _("Move"));
425 } else if (_current.is_scale()) {
426 sp_document_done(sp_desktop_document(_desktop), SP_VERB_CONTEXT_SELECT,
427 _("Scale"));
428 } else if (_current.is_rotation()) {
429 sp_document_done(sp_desktop_document(_desktop), SP_VERB_CONTEXT_SELECT,
430 _("Rotate"));
431 } else {
432 sp_document_done(sp_desktop_document(_desktop), SP_VERB_CONTEXT_SELECT,
433 _("Skew"));
434 }
436 } else {
438 if (_center_is_set) {
439 // we were dragging center; update reprs and commit undoable action
440 for (GSList const *l = _desktop->selection->itemList(); l; l = l->next) {
441 SPItem *it = (SPItem*)SP_OBJECT(l->data);
442 SP_OBJECT(it)->updateRepr();
443 }
444 sp_document_done (sp_desktop_document(_desktop), SP_VERB_CONTEXT_SELECT,
445 _("Set center"));
446 }
448 _items.clear();
449 _items_centers.clear();
450 _updateHandles();
451 }
452 }
454 /* fixme: This is really bad, as we compare positions for each stamp (Lauris) */
455 /* fixme: IMHO the best way to keep sort cache would be to implement timestamping at last */
457 void Inkscape::SelTrans::stamp()
458 {
459 Inkscape::Selection *selection = sp_desktop_selection(_desktop);
461 bool fixup = !_grabbed;
462 if ( fixup && _stamp_cache ) {
463 // TODO - give a proper fix. Simple temproary work-around for the grab() issue
464 g_slist_free(_stamp_cache);
465 _stamp_cache = NULL;
466 }
468 /* stamping mode */
469 if (!_empty) {
470 GSList *l;
471 if (_stamp_cache) {
472 l = _stamp_cache;
473 } else {
474 /* Build cache */
475 l = g_slist_copy((GSList *) selection->itemList());
476 l = g_slist_sort(l, (GCompareFunc) sp_object_compare_position);
477 _stamp_cache = l;
478 }
480 while (l) {
481 SPItem *original_item = SP_ITEM(l->data);
482 Inkscape::XML::Node *original_repr = SP_OBJECT_REPR(original_item);
484 // remember the position of the item
485 gint pos = original_repr->position();
486 // remember parent
487 Inkscape::XML::Node *parent = sp_repr_parent(original_repr);
489 Inkscape::XML::Node *copy_repr = original_repr->duplicate(parent->document());
491 // add the new repr to the parent
492 parent->appendChild(copy_repr);
493 // move to the saved position
494 copy_repr->setPosition(pos > 0 ? pos : 0);
496 SPItem *copy_item = (SPItem *) sp_desktop_document(_desktop)->getObjectByRepr(copy_repr);
498 NR::Matrix const *new_affine;
499 if (_show == SHOW_OUTLINE) {
500 NR::Matrix const i2d(sp_item_i2d_affine(original_item));
501 NR::Matrix const i2dnew( i2d * _current );
502 sp_item_set_i2d_affine(copy_item, i2dnew);
503 new_affine = ©_item->transform;
504 } else {
505 new_affine = &original_item->transform;
506 }
508 sp_item_write_transform(copy_item, copy_repr, *new_affine);
510 if ( copy_item->isCenterSet() && _center ) {
511 copy_item->setCenter(*_center * _current);
512 }
514 Inkscape::GC::release(copy_repr);
515 l = l->next;
516 }
517 sp_document_done(sp_desktop_document(_desktop), SP_VERB_CONTEXT_SELECT,
518 _("Stamp"));
519 }
521 if ( fixup && _stamp_cache ) {
522 // TODO - give a proper fix. Simple temproary work-around for the grab() issue
523 g_slist_free(_stamp_cache);
524 _stamp_cache = NULL;
525 }
526 }
528 void Inkscape::SelTrans::_updateHandles()
529 {
530 if ( !_show_handles || _empty )
531 {
532 sp_remove_handles(_shandle, 8);
533 sp_remove_handles(_rhandle, 8);
534 sp_remove_handles(&_chandle, 1);
535 return;
536 }
538 // center handle
539 if ( _chandle == NULL ) {
540 _chandle = sp_knot_new(_desktop, _("<b>Center</b> of rotation and skewing: drag to reposition; scaling with Shift also uses this center"));
542 _chandle->setShape (SP_CTRL_SHAPE_BITMAP);
543 _chandle->setSize (13);
544 _chandle->setAnchor (handle_center.anchor);
545 _chandle->setMode (SP_CTRL_MODE_XOR);
546 _chandle->setFill(0x00000000, 0x00000000, 0x00000000);
547 _chandle->setStroke(0x000000ff, 0xff0000b0, 0xff0000b0);
548 _chandle->setPixbuf(handles[handle_center.control]);
549 sp_knot_update_ctrl(_chandle);
551 g_signal_connect(G_OBJECT(_chandle), "request",
552 G_CALLBACK(sp_sel_trans_handle_request), (gpointer) &handle_center);
553 g_signal_connect(G_OBJECT(_chandle), "moved",
554 G_CALLBACK(sp_sel_trans_handle_new_event), (gpointer) &handle_center);
555 g_signal_connect(G_OBJECT(_chandle), "grabbed",
556 G_CALLBACK(sp_sel_trans_handle_grab), (gpointer) &handle_center);
557 g_signal_connect(G_OBJECT(_chandle), "ungrabbed",
558 G_CALLBACK(sp_sel_trans_handle_ungrab), (gpointer) &handle_center);
559 g_signal_connect(G_OBJECT(_chandle), "clicked",
560 G_CALLBACK(sp_sel_trans_handle_click), (gpointer) &handle_center);
561 }
563 sp_remove_handles(&_chandle, 1);
564 if ( _state == STATE_SCALE ) {
565 sp_remove_handles(_rhandle, 8);
566 _showHandles(_shandle, handles_scale, 8,
567 _("<b>Squeeze or stretch</b> selection; with <b>Ctrl</b> to scale uniformly; with <b>Shift</b> to scale around rotation center"),
568 _("<b>Scale</b> selection; with <b>Ctrl</b> to scale uniformly; with <b>Shift</b> to scale around rotation center"));
569 } else {
570 sp_remove_handles(_shandle, 8);
571 _showHandles(_rhandle, handles_rotate, 8,
572 _("<b>Skew</b> selection; with <b>Ctrl</b> to snap angle; with <b>Shift</b> to skew around the opposite side"),
573 _("<b>Rotate</b> selection; with <b>Ctrl</b> to snap angle; with <b>Shift</b> to rotate around the opposite corner"));
574 }
576 if (!_center_is_set) {
577 _center = _desktop->selection->center();
578 _center_is_set = true;
579 }
581 if ( _state == STATE_SCALE || !_center ) {
582 sp_knot_hide(_chandle);
583 } else {
584 sp_knot_show(_chandle);
585 sp_knot_moveto(_chandle, &*_center);
586 }
587 }
589 void Inkscape::SelTrans::_updateVolatileState()
590 {
591 Inkscape::Selection *selection = sp_desktop_selection(_desktop);
592 _empty = selection->isEmpty();
594 if (_empty) {
595 return;
596 }
598 //Update the bboxes
599 _bbox = selection->bounds(_snap_bbox_type);
600 _approximate_bbox = selection->bounds(SPItem::APPROXIMATE_BBOX);
602 if (!_bbox) {
603 _empty = true;
604 return;
605 }
607 _strokewidth = stroke_average_width (selection->itemList());
608 }
610 static void sp_remove_handles(SPKnot *knot[], gint num)
611 {
612 for (int i = 0; i < num; i++) {
613 if (knot[i] != NULL) {
614 sp_knot_hide(knot[i]);
615 }
616 }
617 }
619 void Inkscape::SelTrans::_showHandles(SPKnot *knot[], SPSelTransHandle const handle[], gint num,
620 gchar const *even_tip, gchar const *odd_tip)
621 {
622 g_return_if_fail( !_empty );
624 for (int i = 0; i < num; i++) {
625 if (knot[i] == NULL) {
626 knot[i] = sp_knot_new(_desktop, i % 2 ? even_tip : odd_tip);
628 knot[i]->setShape (SP_CTRL_SHAPE_BITMAP);
629 knot[i]->setSize (13);
630 knot[i]->setAnchor (handle[i].anchor);
631 knot[i]->setMode (SP_CTRL_MODE_XOR);
632 knot[i]->setFill(0x000000ff, 0x00ff6600, 0x00ff6600); // inversion, green, green
633 knot[i]->setStroke(0x000000ff, 0x000000ff, 0x000000ff); // inversion
634 knot[i]->setPixbuf(handles[handle[i].control]);
635 sp_knot_update_ctrl(knot[i]);
637 g_signal_connect(G_OBJECT(knot[i]), "request",
638 G_CALLBACK(sp_sel_trans_handle_request), (gpointer) &handle[i]);
639 g_signal_connect(G_OBJECT(knot[i]), "moved",
640 G_CALLBACK(sp_sel_trans_handle_new_event), (gpointer) &handle[i]);
641 g_signal_connect(G_OBJECT(knot[i]), "grabbed",
642 G_CALLBACK(sp_sel_trans_handle_grab), (gpointer) &handle[i]);
643 g_signal_connect(G_OBJECT(knot[i]), "ungrabbed",
644 G_CALLBACK(sp_sel_trans_handle_ungrab), (gpointer) &handle[i]);
645 g_signal_connect(G_OBJECT(knot[i]), "event", G_CALLBACK(sp_seltrans_handle_event), (gpointer) &handle[i]);
646 }
647 sp_knot_show(knot[i]);
649 NR::Point const handle_pt(handle[i].x, handle[i].y);
650 // shouldn't have nullary bbox, but knots
651 g_assert(_bbox);
652 NR::Point p( _bbox->min()
653 + ( _bbox->dimensions()
654 * NR::scale(handle_pt) ) );
656 sp_knot_moveto(knot[i], &p);
657 }
658 }
660 static void sp_sel_trans_handle_grab(SPKnot *knot, guint state, gpointer data)
661 {
662 SP_SELECT_CONTEXT(knot->desktop->event_context)->_seltrans->handleGrab(
663 knot, state, *(SPSelTransHandle const *) data
664 );
665 }
667 static void sp_sel_trans_handle_ungrab(SPKnot *knot, guint state, gpointer data)
668 {
669 SP_SELECT_CONTEXT(knot->desktop->event_context)->_seltrans->ungrab();
670 }
672 static void sp_sel_trans_handle_new_event(SPKnot *knot, NR::Point *position, guint state, gpointer data)
673 {
674 SP_SELECT_CONTEXT(knot->desktop->event_context)->_seltrans->handleNewEvent(
675 knot, position, state, *(SPSelTransHandle const *) data
676 );
677 }
679 static gboolean sp_sel_trans_handle_request(SPKnot *knot, NR::Point *position, guint state, gboolean *data)
680 {
681 return SP_SELECT_CONTEXT(knot->desktop->event_context)->_seltrans->handleRequest(
682 knot, position, state, *(SPSelTransHandle const *) data
683 );
684 }
686 static void sp_sel_trans_handle_click(SPKnot *knot, guint state, gpointer data)
687 {
688 SP_SELECT_CONTEXT(knot->desktop->event_context)->_seltrans->handleClick(
689 knot, state, *(SPSelTransHandle const *) data
690 );
691 }
693 void Inkscape::SelTrans::handleClick(SPKnot *knot, guint state, SPSelTransHandle const &handle)
694 {
695 switch (handle.anchor) {
696 case GTK_ANCHOR_CENTER:
697 if (state & GDK_SHIFT_MASK) {
698 // Unset the center position for all selected items
699 for (GSList const *l = _desktop->selection->itemList(); l; l = l->next) {
700 SPItem *it = (SPItem*)(SP_OBJECT(l->data));
701 it->unsetCenter();
702 SP_OBJECT(it)->updateRepr();
703 _center_is_set = false; // center has changed
704 _updateHandles();
705 }
706 sp_document_done (sp_desktop_document(_desktop), SP_VERB_CONTEXT_SELECT,
707 _("Reset center"));
708 }
709 break;
710 default:
711 break;
712 }
713 }
715 void Inkscape::SelTrans::handleGrab(SPKnot *knot, guint state, SPSelTransHandle const &handle)
716 {
717 switch (handle.anchor) {
718 case GTK_ANCHOR_CENTER:
719 g_object_set(G_OBJECT(_grip),
720 "shape", SP_CTRL_SHAPE_BITMAP,
721 "size", 13.0,
722 NULL);
723 sp_canvas_item_show(_grip);
724 break;
725 default:
726 g_object_set(G_OBJECT(_grip),
727 "shape", SP_CTRL_SHAPE_CROSS,
728 "size", 7.0,
729 NULL);
730 sp_canvas_item_show(_norm);
731 sp_canvas_item_show(_grip);
733 break;
734 }
736 grab(sp_knot_position(knot), handle.x, handle.y, FALSE);
737 }
740 void Inkscape::SelTrans::handleNewEvent(SPKnot *knot, NR::Point *position, guint state, SPSelTransHandle const &handle)
741 {
742 if (!SP_KNOT_IS_GRABBED(knot)) {
743 return;
744 }
746 // in case items have been unhooked from the document, don't
747 // try to continue processing events for them.
748 for (unsigned int i = 0; i < _items.size(); i++) {
749 if (!SP_OBJECT_DOCUMENT(SP_OBJECT(_items[i].first)) ) {
750 return;
751 }
752 }
754 handle.action(this, handle, *position, state);
755 }
758 gboolean Inkscape::SelTrans::handleRequest(SPKnot *knot, NR::Point *position, guint state, SPSelTransHandle const &handle)
759 {
760 if (!SP_KNOT_IS_GRABBED(knot)) {
761 return TRUE;
762 }
764 knot->desktop->setPosition(*position);
766 if (state & GDK_MOD1_MASK) {
767 *position = _point + ( *position - _point ) / 10;
768 }
770 if ((!(state & GDK_SHIFT_MASK) == !(_state == STATE_ROTATE)) && (&handle != &handle_center)) {
771 _origin = _opposite;
772 _origin_for_bboxpoints = _opposite_for_bboxpoints;
773 _origin_for_specpoints = _opposite_for_specpoints;
774 } else if (_center) {
775 _origin = *_center;
776 _origin_for_bboxpoints = *_center;
777 _origin_for_specpoints = *_center;
778 } else {
779 // FIXME
780 return TRUE;
781 }
782 if (handle.request(this, handle, *position, state)) {
783 sp_knot_set_position(knot, position, state);
784 SP_CTRL(_grip)->moveto(*position);
785 SP_CTRL(_norm)->moveto(_origin);
786 }
788 return TRUE;
789 }
792 void Inkscape::SelTrans::_selChanged(Inkscape::Selection *selection)
793 {
794 if (!_grabbed) {
795 // reread in case it changed on the fly:
796 gchar const *prefs_bbox = prefs_get_string_attribute("tools.select", "bounding_box");
797 _snap_bbox_type = (prefs_bbox != NULL && strcmp(prefs_bbox, "geometric")==0)? SPItem::GEOMETRIC_BBOX : SPItem::APPROXIMATE_BBOX;
798 //SPItem::APPROXIMATE_BBOX will be replaced by SPItem::VISUAL_BBOX, as soon as the latter is implemented properly
800 _updateVolatileState();
801 _current.set_identity();
802 _center_is_set = false; // center(s) may have changed
803 _updateHandles();
804 }
805 }
807 void Inkscape::SelTrans::_selModified(Inkscape::Selection *selection, guint flags)
808 {
809 if (!_grabbed) {
810 _updateVolatileState();
811 _current.set_identity();
813 // reset internal flag
814 _changed = false;
816 _center_is_set = false; // center(s) may have changed
818 _updateHandles();
819 }
820 }
822 /*
823 * handlers for handle move-request
824 */
826 /** Returns -1 or 1 according to the sign of x. Returns 1 for 0 and NaN. */
827 static double sign(double const x)
828 {
829 return ( x < 0
830 ? -1
831 : 1 );
832 }
834 gboolean sp_sel_trans_scale_request(Inkscape::SelTrans *seltrans,
835 SPSelTransHandle const &, NR::Point &pt, guint state)
836 {
837 return seltrans->scaleRequest(pt, state);
838 }
840 gboolean sp_sel_trans_stretch_request(Inkscape::SelTrans *seltrans,
841 SPSelTransHandle const &handle, NR::Point &pt, guint state)
842 {
843 return seltrans->stretchRequest(handle, pt, state);
844 }
846 gboolean sp_sel_trans_skew_request(Inkscape::SelTrans *seltrans,
847 SPSelTransHandle const &handle, NR::Point &pt, guint state)
848 {
849 return seltrans->skewRequest(handle, pt, state);
850 }
852 gboolean sp_sel_trans_rotate_request(Inkscape::SelTrans *seltrans,
853 SPSelTransHandle const &, NR::Point &pt, guint state)
854 {
855 return seltrans->rotateRequest(pt, state);
856 }
858 gboolean sp_sel_trans_center_request(Inkscape::SelTrans *seltrans,
859 SPSelTransHandle const &, NR::Point &pt, guint state)
860 {
861 return seltrans->centerRequest(pt, state);
862 }
864 gboolean Inkscape::SelTrans::scaleRequest(NR::Point &pt, guint state)
865 {
866 using NR::X;
867 using NR::Y;
869 NR::Point d = _point - _origin;
870 NR::scale s(0, 0);
872 /* Work out the new scale factors `s' */
873 for ( unsigned int i = 0 ; i < 2 ; i++ ) {
874 if ( fabs(d[i]) > 0.001 ) {
875 s[i] = ( pt[i] - _origin[i] ) / d[i];
876 if ( fabs(s[i]) < 1e-9 ) {
877 s[i] = 1e-9;
878 }
879 }
880 }
882 SnapManager const &m = _desktop->namedview->snap_manager;
884 /* Get a STL list of the selected items.
885 ** FIXME: this should probably be done by Inkscape::Selection.
886 */
887 std::list<SPItem const*> it;
888 for (GSList const *i = _selection->itemList(); i != NULL; i = i->next) {
889 it.push_back(reinterpret_cast<SPItem*>(i->data));
890 }
892 if ((state & GDK_CONTROL_MASK) || _desktop->isToolboxButtonActive ("lock")) {
893 // Scale is locked to a 1:1 aspect ratio, so that s[X] must be made to equal s[Y].
894 //
895 // The aspect-ratio must be locked before snapping
896 if (fabs(s[NR::X]) > fabs(s[NR::Y])) {
897 s[NR::X] = fabs(s[NR::Y]) * sign(s[NR::X]);
898 } else {
899 s[NR::Y] = fabs(s[NR::X]) * sign(s[NR::Y]);
900 }
902 // Snap along a suitable constraint vector from the origin.
904 // The inclination of the constraint vector is calculated from the aspect ratio
905 NR::Point bbox_dim = _bbox->dimensions();
906 double const aspect_ratio = bbox_dim[1] / bbox_dim[0]; // = height / width
908 // Determine direction of the constraint vector
909 NR::Point const cv = NR::Point(
910 pt[NR::X] > _origin[NR::X] ? 1 : -1,
911 pt[NR::Y] > _origin[NR::Y] ? aspect_ratio : -aspect_ratio
912 );
914 std::pair<NR::scale, bool> bb = m.constrainedSnapScale(Snapper::BBOX_POINT,
915 _bbox_points,
916 it,
917 Snapper::ConstraintLine(_origin_for_bboxpoints, cv),
918 s,
919 _origin_for_bboxpoints);
921 std::pair<NR::scale, bool> sn = m.constrainedSnapScale(Snapper::SNAP_POINT,
922 _snap_points,
923 it,
924 Snapper::ConstraintLine(_origin_for_specpoints, cv),
925 s,
926 _origin_for_specpoints);
928 if (bb.second == false && sn.second == false) {
929 /* We didn't snap, so just keep the locked aspect ratio */
930 } else {
931 /* Choose the smaller difference in scale. Since s[X] == s[Y] we can
932 ** just compare difference in s[X].
933 */
934 double const bd = bb.second ? fabs(bb.first[NR::X] - s[NR::X]) : NR_HUGE;
935 double const sd = sn.second ? fabs(sn.first[NR::X] - s[NR::X]) : NR_HUGE;
936 s = (bd < sd) ? bb.first : sn.first;
937 }
939 } else {
940 /* Scale aspect ratio is unlocked */
942 std::pair<NR::scale, bool> bb = m.freeSnapScale(Snapper::BBOX_POINT,
943 _bbox_points,
944 it,
945 s,
946 _origin_for_bboxpoints);
947 std::pair<NR::scale, bool> sn = m.freeSnapScale(Snapper::SNAP_POINT,
948 _snap_points,
949 it,
950 s,
951 _origin_for_specpoints);
953 /* Pick the snap that puts us closest to the original scale */
954 NR::Coord bd = bb.second ?
955 fabs(NR::L2(NR::Point(bb.first[NR::X], bb.first[NR::Y])) -
956 NR::L2(NR::Point(s[NR::X], s[NR::Y])))
957 : NR_HUGE;
958 NR::Coord sd = sn.second ?
959 fabs(NR::L2(NR::Point(sn.first[NR::X], sn.first[NR::Y])) -
960 NR::L2(NR::Point(s[NR::X], s[NR::Y])))
961 : NR_HUGE;
962 s = (bd < sd) ? bb.first : sn.first;
963 }
965 /* Update the knot position */
966 pt = ( _point - _origin ) * s + _origin;
968 /* Status text */
969 _message_context.setF(Inkscape::NORMAL_MESSAGE,
970 _("<b>Scale</b>: %0.2f%% x %0.2f%%; with <b>Ctrl</b> to lock ratio"),
971 100 * s[NR::X], 100 * s[NR::Y]);
973 return TRUE;
974 }
976 gboolean Inkscape::SelTrans::stretchRequest(SPSelTransHandle const &handle, NR::Point &pt, guint state)
977 {
978 using NR::X;
979 using NR::Y;
981 NR::Dim2 axis, perp;
983 switch (handle.cursor) {
984 case GDK_TOP_SIDE:
985 case GDK_BOTTOM_SIDE:
986 axis = NR::Y;
987 perp = NR::X;
988 break;
989 case GDK_LEFT_SIDE:
990 case GDK_RIGHT_SIDE:
991 axis = NR::X;
992 perp = NR::Y;
993 break;
994 default:
995 g_assert_not_reached();
996 return TRUE;
997 };
999 if ( fabs( _point[axis] - _origin[axis] ) < 1e-15 ) {
1000 return FALSE;
1001 }
1003 NR::scale s(1, 1);
1004 s[axis] = ( ( pt[axis] - _origin[axis] )
1005 / ( _point[axis] - _origin[axis] ) );
1006 if ( fabs(s[axis]) < 1e-15 ) {
1007 s[axis] = 1e-15;
1008 }
1010 /* Get a STL list of the selected items.
1011 ** FIXME: this should probably be done by Inkscape::Selection.
1012 */
1013 std::list<SPItem const*> it;
1014 for (GSList const *i = _selection->itemList(); i != NULL; i = i->next) {
1015 it.push_back(reinterpret_cast<SPItem*>(i->data));
1016 }
1018 SnapManager const &m = _desktop->namedview->snap_manager;
1020 if ( state & GDK_CONTROL_MASK ) {
1021 // on ctrl, apply symmetrical scaling instead of stretching
1022 s[perp] = fabs(s[axis]);
1024 std::pair<NR::Coord, bool> const bb = m.freeSnapStretch(
1025 Snapper::BBOX_POINT,
1026 _bbox_points,
1027 it,
1028 s[axis],
1029 _origin_for_bboxpoints,
1030 axis,
1031 true);
1033 std::pair<NR::Coord, bool> const sn = m.freeSnapStretch(
1034 Snapper::SNAP_POINT,
1035 _snap_points,
1036 it,
1037 s[axis],
1038 _origin_for_specpoints,
1039 axis,
1040 true);
1042 NR::Coord const bd = bb.second ? fabs(bb.first - s[axis]) : NR_HUGE;
1043 NR::Coord const sd = sn.second ? fabs(sn.first - s[axis]) : NR_HUGE;
1044 NR::Coord const ratio = (bd < sd) ? bb.first : sn.first;
1046 s[axis] = fabs(ratio) * sign(s[axis]);
1047 s[perp] = fabs(s[axis]);
1048 } else {
1050 std::pair<NR::Coord, bool> const bb = m.freeSnapStretch(
1051 Snapper::BBOX_POINT,
1052 _bbox_points,
1053 it,
1054 s[axis],
1055 _origin_for_bboxpoints,
1056 axis,
1057 false);
1059 std::pair<NR::Coord, bool> const sn = m.freeSnapStretch(
1060 Snapper::SNAP_POINT,
1061 _snap_points,
1062 it,
1063 s[axis],
1064 _origin_for_specpoints,
1065 axis,
1066 false);
1068 /* Choose the smaller difference in scale */
1069 NR::Coord const bd = bb.second ? fabs(bb.first - s[axis]) : NR_HUGE;
1070 NR::Coord const sd = sn.second ? fabs(sn.first - s[axis]) : NR_HUGE;
1071 s[axis] = (bd < sd) ? bb.first : sn.first;
1072 s[perp] = 1;
1073 }
1075 pt = ( _point - _origin ) * NR::scale(s) + _origin;
1076 if (isNaN(pt[X] + pt[Y])) {
1077 g_warning("point=(%g, %g), norm=(%g, %g), s=(%g, %g)\n",
1078 _point[X], _point[Y], _origin[X], _origin[Y], s[X], s[Y]);
1079 }
1081 // status text
1082 _message_context.setF(Inkscape::NORMAL_MESSAGE,
1083 _("<b>Scale</b>: %0.2f%% x %0.2f%%; with <b>Ctrl</b> to lock ratio"),
1084 100 * s[NR::X], 100 * s[NR::Y]);
1086 return TRUE;
1087 }
1089 gboolean Inkscape::SelTrans::skewRequest(SPSelTransHandle const &handle, NR::Point &pt, guint state)
1090 {
1091 using NR::X;
1092 using NR::Y;
1094 if (handle.cursor != GDK_SB_V_DOUBLE_ARROW && handle.cursor != GDK_SB_H_DOUBLE_ARROW) {
1095 return FALSE;
1096 }
1098 NR::Dim2 dim_a;
1099 NR::Dim2 dim_b;
1100 if (handle.cursor == GDK_SB_V_DOUBLE_ARROW) {
1101 dim_a = X;
1102 dim_b = Y;
1103 } else {
1104 dim_a = Y;
1105 dim_b = X;
1106 }
1108 double skew[2];
1109 double s[2] = { 1.0, 1.0 };
1111 if (fabs(_point[dim_a] - _origin[dim_a]) < NR_EPSILON) {
1112 return FALSE;
1113 }
1115 skew[dim_a] = ( pt[dim_b] - _point[dim_b] ) / ( _point[dim_a] - _origin[dim_a] );
1117 s[dim_a] = ( pt[dim_a] - _origin[dim_a] ) / ( _point[dim_a] - _origin[dim_a] );
1119 if ( fabs(s[dim_a]) < 1 ) {
1120 s[dim_a] = sign(s[dim_a]);
1121 } else {
1122 s[dim_a] = floor( s[dim_a] + 0.5 );
1123 }
1125 double radians = atan(skew[dim_a] / s[dim_a]);
1127 if (state & GDK_CONTROL_MASK) {
1129 int snaps = prefs_get_int_attribute("options.rotationsnapsperpi", "value", 12);
1131 if (snaps) {
1132 double sections = floor( radians * snaps / M_PI + .5 );
1133 if (fabs(sections) >= snaps / 2) sections = sign(sections) * (snaps / 2 - 1);
1134 radians = ( M_PI / snaps ) * sections;
1135 }
1136 skew[dim_a] = tan(radians) * s[dim_a];
1137 } else {
1138 SnapManager const &m = _desktop->namedview->snap_manager;
1140 std::pair<NR::Coord, bool> bb = m.freeSnapSkew(Inkscape::Snapper::BBOX_POINT,
1141 _bbox_points,
1142 std::list<SPItem const *>(),
1143 skew[dim_a],
1144 _origin_for_bboxpoints,
1145 dim_b);
1147 std::pair<NR::Coord, bool> sn = m.freeSnapSkew(Inkscape::Snapper::SNAP_POINT,
1148 _snap_points,
1149 std::list<SPItem const *>(),
1150 skew[dim_a],
1151 _origin_for_specpoints,
1152 dim_b);
1154 if (bb.second || sn.second) {
1155 /* We snapped something, so change the skew to reflect it */
1156 NR::Coord const bd = bb.second ? bb.first : NR_HUGE;
1157 NR::Coord const sd = sn.second ? sn.first : NR_HUGE;
1158 skew[dim_a] = std::min(bd, sd);
1159 }
1160 }
1162 pt[dim_b] = ( _point[dim_a] - _origin[dim_a] ) * skew[dim_a] + _point[dim_b];
1163 pt[dim_a] = ( _point[dim_a] - _origin[dim_a] ) * s[dim_a] + _origin[dim_a];
1165 /* status text */
1166 double degrees = 180 / M_PI * radians;
1167 if (degrees > 180) degrees -= 360;
1168 if (degrees < -180) degrees += 360;
1170 _message_context.setF(Inkscape::NORMAL_MESSAGE,
1171 // TRANSLATORS: don't modify the first ";"
1172 // (it will NOT be displayed as ";" - only the second one will be)
1173 _("<b>Skew</b>: %0.2f°; with <b>Ctrl</b> to snap angle"),
1174 degrees);
1176 return TRUE;
1177 }
1179 gboolean Inkscape::SelTrans::rotateRequest(NR::Point &pt, guint state)
1180 {
1181 int snaps = prefs_get_int_attribute("options.rotationsnapsperpi", "value", 12);
1183 // rotate affine in rotate
1184 NR::Point const d1 = _point - _origin;
1185 NR::Point const d2 = pt - _origin;
1187 NR::Coord const h1 = NR::L2(d1);
1188 if (h1 < 1e-15) return FALSE;
1189 NR::Point q1 = d1 / h1;
1190 NR::Coord const h2 = NR::L2(d2);
1191 if (fabs(h2) < 1e-15) return FALSE;
1192 NR::Point q2 = d2 / h2;
1194 double radians;
1195 if (state & GDK_CONTROL_MASK) {
1196 /* Have to restrict movement. */
1197 double cos_t = NR::dot(q1, q2);
1198 double sin_t = NR::dot(NR::rot90(q1), q2);
1199 radians = atan2(sin_t, cos_t);
1200 if (snaps) {
1201 radians = ( M_PI / snaps ) * floor( radians * snaps / M_PI + .5 );
1202 }
1203 q1 = NR::Point(1, 0);
1204 q2 = NR::Point(cos(radians), sin(radians));
1205 } else {
1206 radians = atan2(NR::dot(NR::rot90(d1), d2),
1207 NR::dot(d1, d2));
1208 }
1210 NR::rotate const r1(q1);
1211 NR::rotate const r2(q2);
1212 pt = _point * NR::translate(-_origin) * ( r2 / r1 ) * NR::translate(_origin);
1214 /* status text */
1215 double degrees = 180 / M_PI * radians;
1216 if (degrees > 180) degrees -= 360;
1217 if (degrees < -180) degrees += 360;
1219 _message_context.setF(Inkscape::NORMAL_MESSAGE,
1220 // TRANSLATORS: don't modify the first ";"
1221 // (it will NOT be displayed as ";" - only the second one will be)
1222 _("<b>Rotate</b>: %0.2f°; with <b>Ctrl</b> to snap angle"), degrees);
1224 return TRUE;
1225 }
1227 gboolean Inkscape::SelTrans::centerRequest(NR::Point &pt, guint state)
1228 {
1229 using NR::X;
1230 using NR::Y;
1232 SnapManager const &m = _desktop->namedview->snap_manager;
1233 pt = m.freeSnap(Snapper::SNAP_POINT, pt, NULL).getPoint();
1235 if (state & GDK_CONTROL_MASK) {
1236 if ( fabs(_point[X] - pt[X]) > fabs(_point[Y] - pt[Y]) ) {
1237 pt[Y] = _point[Y];
1238 } else {
1239 pt[X] = _point[X];
1240 }
1241 }
1243 if ( !(state & GDK_SHIFT_MASK) && _bbox ) {
1244 // screen pixels to snap center to bbox
1245 #define SNAP_DIST 5
1246 // FIXME: take from prefs
1247 double snap_dist = SNAP_DIST / _desktop->current_zoom();
1249 for (int i = 0; i < 2; i++) {
1250 if (fabs(pt[i] - _bbox->min()[i]) < snap_dist) {
1251 pt[i] = _bbox->min()[i];
1252 }
1253 if (fabs(pt[i] - _bbox->midpoint()[i]) < snap_dist) {
1254 pt[i] = _bbox->midpoint()[i];
1255 }
1256 if (fabs(pt[i] - _bbox->max()[i]) < snap_dist) {
1257 pt[i] = _bbox->max()[i];
1258 }
1259 }
1260 }
1262 // status text
1263 GString *xs = SP_PX_TO_METRIC_STRING(pt[X], _desktop->namedview->getDefaultMetric());
1264 GString *ys = SP_PX_TO_METRIC_STRING(pt[Y], _desktop->namedview->getDefaultMetric());
1265 _message_context.setF(Inkscape::NORMAL_MESSAGE, _("Move <b>center</b> to %s, %s"), xs->str, ys->str);
1266 g_string_free(xs, FALSE);
1267 g_string_free(ys, FALSE);
1269 return TRUE;
1270 }
1272 /*
1273 * handlers for handle movement
1274 *
1275 */
1277 void sp_sel_trans_stretch(Inkscape::SelTrans *seltrans, SPSelTransHandle const &handle, NR::Point &pt, guint state)
1278 {
1279 seltrans->stretch(handle, pt, state);
1280 }
1282 void sp_sel_trans_scale(Inkscape::SelTrans *seltrans, SPSelTransHandle const &, NR::Point &pt, guint state)
1283 {
1284 seltrans->scale(pt, state);
1285 }
1287 void sp_sel_trans_skew(Inkscape::SelTrans *seltrans, SPSelTransHandle const &handle, NR::Point &pt, guint state)
1288 {
1289 seltrans->skew(handle, pt, state);
1290 }
1292 void sp_sel_trans_rotate(Inkscape::SelTrans *seltrans, SPSelTransHandle const &, NR::Point &pt, guint state)
1293 {
1294 seltrans->rotate(pt, state);
1295 }
1297 void Inkscape::SelTrans::stretch(SPSelTransHandle const &handle, NR::Point &pt, guint state)
1298 {
1299 using NR::X;
1300 using NR::Y;
1302 NR::Dim2 dim;
1303 switch (handle.cursor) {
1304 case GDK_LEFT_SIDE:
1305 case GDK_RIGHT_SIDE:
1306 dim = X;
1307 break;
1308 case GDK_TOP_SIDE:
1309 case GDK_BOTTOM_SIDE:
1310 dim = Y;
1311 break;
1312 default:
1313 g_assert_not_reached();
1314 abort();
1315 break;
1316 }
1318 NR::Point const scale_origin(_origin);
1319 double const offset = _point[dim] - scale_origin[dim];
1320 if (!( fabs(offset) >= 1e-15 )) {
1321 return;
1322 }
1323 NR::scale s(1, 1);
1324 s[dim] = ( pt[dim] - scale_origin[dim] ) / offset;
1325 if (isNaN(s[dim])) {
1326 g_warning("s[dim]=%g, pt[dim]=%g, scale_origin[dim]=%g, point[dim]=%g\n",
1327 s[dim], pt[dim], scale_origin[dim], _point[dim]);
1328 }
1329 if (!( fabs(s[dim]) >= 1e-15 )) {
1330 s[dim] = 1e-15;
1331 }
1332 if (state & GDK_CONTROL_MASK) {
1333 /* Preserve aspect ratio, but never flip in the dimension not being edited. */
1334 s[!dim] = fabs(s[dim]);
1335 }
1337 if (!_bbox) {
1338 return;
1339 }
1341 //Get two corners of the new bbox
1342 NR::Point p1 = _approximate_bbox->min() * (NR::translate(-scale_origin) * NR::Matrix(s) * NR::translate(scale_origin));
1343 NR::Point p2 = _approximate_bbox->max() * (NR::translate(-scale_origin) * NR::Matrix(s) * NR::translate(scale_origin));
1345 //Find the corners at the lower-left and upper-right, as required by get_scale_transform_with_stroke
1346 NR::Point new_bbox_min = NR::Point(std::min(p1[NR::X], p2[NR::X]), std::min(p1[NR::Y], p2[NR::Y]));
1347 NR::Point new_bbox_max = NR::Point(std::max(p1[NR::X], p2[NR::X]), std::max(p1[NR::Y], p2[NR::Y]));
1349 int transform_stroke = false;
1350 gdouble strokewidth = 0;
1352 if ( _snap_bbox_type != SPItem::GEOMETRIC_BBOX) {
1353 transform_stroke = prefs_get_int_attribute ("options.transform", "stroke", 1);
1354 strokewidth = _strokewidth;
1355 }
1357 NR::Matrix scaler = get_scale_transform_with_stroke (*_approximate_bbox, strokewidth, transform_stroke,
1358 new_bbox_min[NR::X], new_bbox_min[NR::Y], new_bbox_max[NR::X], new_bbox_max[NR::Y]);
1360 transform(scaler, NR::Point(0, 0)); // we have already accounted for origin, so pass 0,0
1361 }
1363 void Inkscape::SelTrans::scale(NR::Point &pt, guint state)
1364 {
1365 if (!_bbox) {
1366 return;
1367 }
1369 NR::Point const offset = _point - _origin;
1371 NR::scale s (1, 1);
1372 for (int i = NR::X; i <= NR::Y; i++) {
1373 if (fabs(offset[i]) > 1e-9)
1374 s[i] = (pt[i] - _origin[i]) / offset[i];
1375 if (fabs(s[i]) < 1e-9)
1376 s[i] = 1e-9;
1377 }
1379 //Get two corners of the new bbox
1380 NR::Point p1 = _approximate_bbox->min() * (NR::translate(-_origin) * NR::Matrix(s) * NR::translate(_origin));
1381 NR::Point p2 = _approximate_bbox->max() * (NR::translate(-_origin) * NR::Matrix(s) * NR::translate(_origin));
1383 //Find the corners at the lower-left and upper-right, as required by get_scale_transform_with_stroke
1384 NR::Point new_bbox_min = NR::Point(std::min(p1[NR::X], p2[NR::X]), std::min(p1[NR::Y], p2[NR::Y]));
1385 NR::Point new_bbox_max = NR::Point(std::max(p1[NR::X], p2[NR::X]), std::max(p1[NR::Y], p2[NR::Y]));
1387 int transform_stroke = false;
1388 gdouble strokewidth = 0;
1390 if ( _snap_bbox_type != SPItem::GEOMETRIC_BBOX) {
1391 transform_stroke = prefs_get_int_attribute ("options.transform", "stroke", 1);
1392 strokewidth = _strokewidth;
1393 }
1395 NR::Matrix scaler = get_scale_transform_with_stroke (*_approximate_bbox, strokewidth, transform_stroke,
1396 new_bbox_min[NR::X], new_bbox_min[NR::Y], new_bbox_max[NR::X], new_bbox_max[NR::Y]);
1398 transform(scaler, NR::Point(0, 0)); // we have already accounted for origin, so pass 0,0
1399 }
1401 void Inkscape::SelTrans::skew(SPSelTransHandle const &handle, NR::Point &pt, guint state)
1402 {
1403 NR::Point const offset = _point - _origin;
1405 unsigned dim;
1406 switch (handle.cursor) {
1407 case GDK_SB_H_DOUBLE_ARROW:
1408 dim = NR::Y;
1409 break;
1410 case GDK_SB_V_DOUBLE_ARROW:
1411 dim = NR::X;
1412 break;
1413 default:
1414 g_assert_not_reached();
1415 abort();
1416 break;
1417 }
1418 if (fabs(offset[dim]) < 1e-15) {
1419 return;
1420 }
1421 NR::Matrix skew = NR::identity();
1422 skew[2*dim + dim] = (pt[dim] - _origin[dim]) / offset[dim];
1423 skew[2*dim + (1-dim)] = (pt[1-dim] - _point[1-dim]) / offset[dim];
1424 skew[2*(1-dim) + (dim)] = 0;
1425 skew[2*(1-dim) + (1-dim)] = 1;
1427 for (int i = 0; i < 2; i++) {
1428 if (fabs(skew[3*i]) < 1e-15) {
1429 skew[3*i] = 1e-15;
1430 }
1431 }
1432 transform(skew, _origin);
1433 }
1435 void Inkscape::SelTrans::rotate(NR::Point &pt, guint state)
1436 {
1437 NR::Point const offset = _point - _origin;
1439 NR::Coord const h1 = NR::L2(offset);
1440 if (h1 < 1e-15) {
1441 return;
1442 }
1443 NR::Point const q1 = offset / h1;
1444 NR::Coord const h2 = NR::L2( pt - _origin );
1445 if (h2 < 1e-15) {
1446 return;
1447 }
1448 NR::Point const q2 = (pt - _origin) / h2;
1449 NR::rotate const r1(q1);
1450 NR::rotate const r2(q2);
1452 NR::Matrix rotate( r2 / r1 );
1453 transform(rotate, _origin);
1454 }
1456 void sp_sel_trans_center(Inkscape::SelTrans *seltrans, SPSelTransHandle const &, NR::Point &pt, guint state)
1457 {
1458 seltrans->setCenter(pt);
1459 }
1462 void Inkscape::SelTrans::moveTo(NR::Point const &xy, guint state)
1463 {
1464 SnapManager const &m = _desktop->namedview->snap_manager;
1466 /* The amount that we've moved by during this drag */
1467 NR::Point dxy = xy - _point;
1469 /* Get a STL list of the selected items.
1470 ** FIXME: this should probably be done by Inkscape::Selection.
1471 */
1472 std::list<SPItem const*> it;
1473 for (GSList const *i = _selection->itemList(); i != NULL; i = i->next) {
1474 it.push_back(reinterpret_cast<SPItem*>(i->data));
1475 }
1477 bool const alt = (state & GDK_MOD1_MASK);
1478 bool const control = (state & GDK_CONTROL_MASK);
1479 bool const shift = (state & GDK_SHIFT_MASK);
1481 if (alt) {
1483 /* Alt pressed means keep offset: snap the moved distance to the grid.
1484 ** FIXME: this will snap to more than just the grid, nowadays.
1485 */
1487 dxy = m.freeSnap(Snapper::SNAP_POINT, dxy, NULL).getPoint();
1489 } else if (!shift) {
1491 /* We're snapping to things, possibly with a constraint to horizontal or
1492 ** vertical movement. Obtain a list of possible translations and then
1493 ** pick the smallest.
1494 */
1496 /* This will be our list of possible translations */
1497 std::list<std::pair<NR::Point, bool> > s;
1499 if (control) {
1501 /* Snap to things, and also constrain to horizontal or vertical movement */
1503 for (unsigned int dim = 0; dim < 2; dim++) {
1504 s.push_back(m.constrainedSnapTranslation(Inkscape::Snapper::BBOX_POINT,
1505 _bbox_points,
1506 it,
1507 Inkscape::Snapper::ConstraintLine(component_vectors[dim]),
1508 dxy));
1510 s.push_back(m.constrainedSnapTranslation(Inkscape::Snapper::SNAP_POINT,
1511 _snap_points,
1512 it,
1513 Inkscape::Snapper::ConstraintLine(component_vectors[dim]),
1514 dxy));
1515 }
1517 } else {
1519 /* Snap to things with no constraint */
1521 s.push_back(m.freeSnapTranslation(Inkscape::Snapper::BBOX_POINT,
1522 _bbox_points, it, dxy));
1523 s.push_back(m.freeSnapTranslation(Inkscape::Snapper::SNAP_POINT,
1524 _snap_points, it, dxy));
1525 }
1527 /* Pick one */
1528 NR::Coord best = NR_HUGE;
1529 for (std::list<std::pair<NR::Point, bool> >::const_iterator i = s.begin(); i != s.end(); i++) {
1530 if (i->second) {
1531 NR::Coord const m = NR::L2(i->first);
1532 if (m < best) {
1533 best = m;
1534 dxy = i->first;
1535 }
1536 }
1537 }
1538 }
1540 if (control) {
1541 /* Ensure that the horizontal and vertical constraint has been applied */
1542 if (fabs(dxy[NR::X]) > fabs(dxy[NR::Y])) {
1543 dxy[NR::Y] = 0;
1544 } else {
1545 dxy[NR::X] = 0;
1546 }
1547 }
1549 NR::Matrix const move((NR::translate(dxy)));
1550 NR::Point const norm(0, 0);
1551 transform(move, norm);
1553 // status text
1554 GString *xs = SP_PX_TO_METRIC_STRING(dxy[NR::X], _desktop->namedview->getDefaultMetric());
1555 GString *ys = SP_PX_TO_METRIC_STRING(dxy[NR::Y], _desktop->namedview->getDefaultMetric());
1556 _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);
1557 g_string_free(xs, TRUE);
1558 g_string_free(ys, TRUE);
1559 }
1562 /*
1563 Local Variables:
1564 mode:c++
1565 c-file-style:"stroustrup"
1566 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
1567 indent-tabs-mode:nil
1568 fill-column:99
1569 End:
1570 */
1571 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4 :