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 <glibmm/i18n.h>
43 #include "display/sp-ctrlline.h"
44 #include "prefs-utils.h"
45 #include "xml/repr.h"
47 #include "isnan.h" //temp fix. make sure included last
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, NR::Point *position, guint32 state, gpointer data);
55 static gboolean sp_sel_trans_handle_request(SPKnot *knot, NR::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 _box(NR::Point(0,0), NR::Point(0,0)),
91 _chandle(NULL),
92 _stamp_cache(NULL),
93 _message_context(desktop->messageStack())
94 {
95 g_return_if_fail(desktop != NULL);
97 for (int i = 0; i < 8; i++) {
98 _shandle[i] = NULL;
99 _rhandle[i] = NULL;
100 }
102 _updateVolatileState();
104 _center_is_set = false; // reread _center from items, or set to bbox midpoint
106 _updateHandles();
108 _selection = SP_DT_SELECTION(desktop);
110 _norm = sp_canvas_item_new(SP_DT_CONTROLS(desktop),
111 SP_TYPE_CTRL,
112 "anchor", GTK_ANCHOR_CENTER,
113 "mode", SP_CTRL_MODE_COLOR,
114 "shape", SP_CTRL_SHAPE_BITMAP,
115 "size", 13.0,
116 "filled", TRUE,
117 "fill_color", 0x00000000,
118 "stroked", TRUE,
119 "stroke_color", 0x000000a0,
120 "pixbuf", handles[12],
121 NULL);
123 _grip = sp_canvas_item_new(SP_DT_CONTROLS(desktop),
124 SP_TYPE_CTRL,
125 "anchor", GTK_ANCHOR_CENTER,
126 "mode", SP_CTRL_MODE_XOR,
127 "shape", SP_CTRL_SHAPE_CROSS,
128 "size", 7.0,
129 "filled", TRUE,
130 "fill_color", 0xffffff7f,
131 "stroked", TRUE,
132 "stroke_color", 0xffffffff,
133 "pixbuf", handles[12],
134 NULL);
136 sp_canvas_item_hide(_grip);
137 sp_canvas_item_hide(_norm);
139 for (int i = 0; i < 4; i++) {
140 _l[i] = sp_canvas_item_new(SP_DT_CONTROLS(desktop), SP_TYPE_CTRLLINE, NULL);
141 sp_canvas_item_hide(_l[i]);
142 }
144 _sel_changed_connection = _selection->connectChanged(
145 sigc::mem_fun(*this, &Inkscape::SelTrans::_selChanged)
146 );
148 _sel_modified_connection = _selection->connectModified(
149 sigc::mem_fun(*this, &Inkscape::SelTrans::_selModified)
150 );
151 }
153 Inkscape::SelTrans::~SelTrans()
154 {
155 _sel_changed_connection.disconnect();
156 _sel_modified_connection.disconnect();
158 for (unsigned int i = 0; i < 8; i++) {
159 if (_shandle[i]) {
160 g_object_unref(G_OBJECT(_shandle[i]));
161 _shandle[i] = NULL;
162 }
163 if (_rhandle[i]) {
164 g_object_unref(G_OBJECT(_rhandle[i]));
165 _rhandle[i] = NULL;
166 }
167 }
168 if (_chandle) {
169 g_object_unref(G_OBJECT(_chandle));
170 _chandle = NULL;
171 }
173 if (_norm) {
174 gtk_object_destroy(GTK_OBJECT(_norm));
175 _norm = NULL;
176 }
177 if (_grip) {
178 gtk_object_destroy(GTK_OBJECT(_grip));
179 _grip = NULL;
180 }
181 for (int i = 0; i < 4; i++) {
182 if (_l[i]) {
183 gtk_object_destroy(GTK_OBJECT(_l[i]));
184 _l[i] = NULL;
185 }
186 }
188 for (unsigned i = 0; i < _items.size(); i++) {
189 sp_object_unref(SP_OBJECT(_items[i].first), NULL);
190 }
192 _items.clear();
193 _items_centers.clear();
194 }
196 void Inkscape::SelTrans::resetState()
197 {
198 _state = STATE_SCALE;
199 }
201 void Inkscape::SelTrans::increaseState()
202 {
203 if (_state == STATE_SCALE) {
204 _state = STATE_ROTATE;
205 } else {
206 _state = STATE_SCALE;
207 }
209 _center_is_set = true; // no need to reread center
211 _updateHandles();
212 }
214 void Inkscape::SelTrans::setCenter(NR::Point const &p)
215 {
216 _center = p;
217 _center_is_set = true;
219 // Write the new center position into all selected items
220 for (GSList const *l = _desktop->selection->itemList(); l; l = l->next) {
221 SPItem *it = (SPItem*)sp_object_ref(SP_OBJECT(l->data), NULL);
222 it->setCenter(p);
223 SP_OBJECT(it)->updateRepr();
224 }
225 sp_document_maybe_done (SP_DT_DOCUMENT(_desktop), "center::move");
227 _updateHandles();
228 }
230 void Inkscape::SelTrans::grab(NR::Point const &p, gdouble x, gdouble y, bool show_handles)
231 {
232 Inkscape::Selection *selection = SP_DT_SELECTION(_desktop);
234 g_return_if_fail(!_grabbed);
236 _grabbed = true;
237 _show_handles = show_handles;
238 _updateVolatileState();
240 _changed = false;
242 if (_empty) {
243 return;
244 }
246 for (GSList const *l = selection->itemList(); l; l = l->next) {
247 SPItem *it = (SPItem*)sp_object_ref(SP_OBJECT(l->data), NULL);
248 _items.push_back(std::pair<SPItem *, NR::Matrix>(it, sp_item_i2d_affine(it)));
249 _items_centers.push_back(std::pair<SPItem *, NR::Point>(it, it->getCenter())); // for content-dragging, we need to remember original centers
250 }
252 _current.set_identity();
254 _point = p;
256 _snap_points = selection->getSnapPoints();
257 _bbox_points = selection->getBBoxPoints();
259 gchar const *scale_origin = prefs_get_string_attribute("tools.select", "scale_origin");
260 bool const origin_on_bbox = (scale_origin == NULL || !strcmp(scale_origin, "bbox"));
261 NR::Rect op_box = _box;
262 if (origin_on_bbox == false && _snap_points.empty() == false) {
263 std::vector<NR::Point>::iterator i = _snap_points.begin();
264 op_box = NR::Rect(*i, *i);
265 i++;
266 while (i != _snap_points.end()) {
267 op_box.expandTo(*i);
268 i++;
269 }
270 }
272 _opposite = ( op_box.min() + ( op_box.dimensions() * NR::scale(1-x, 1-y) ) );
274 if ((x != -1) && (y != -1)) {
275 sp_canvas_item_show(_norm);
276 sp_canvas_item_show(_grip);
277 }
279 if (_show == SHOW_OUTLINE) {
280 for (int i = 0; i < 4; i++)
281 sp_canvas_item_show(_l[i]);
282 }
285 _updateHandles();
286 g_return_if_fail(_stamp_cache == NULL);
287 }
289 void Inkscape::SelTrans::transform(NR::Matrix const &rel_affine, NR::Point const &norm)
290 {
291 g_return_if_fail(_grabbed);
292 g_return_if_fail(!_empty);
294 NR::Matrix const affine( NR::translate(-norm) * rel_affine * NR::translate(norm) );
296 if (_show == SHOW_CONTENT) {
297 // update the content
298 for (unsigned i = 0; i < _items.size(); i++) {
299 SPItem &item = *_items[i].first;
300 NR::Matrix const &prev_transform = _items[i].second;
301 sp_item_set_i2d_affine(&item, prev_transform * affine);
302 }
303 } else {
304 NR::Point p[4];
305 /* update the outline */
306 for (unsigned i = 0 ; i < 4 ; i++) {
307 p[i] = _box.corner(i) * affine;
308 }
309 for (unsigned i = 0 ; i < 4 ; i++) {
310 sp_ctrlline_set_coords(SP_CTRLLINE(_l[i]), p[i], p[(i+1)%4]);
311 }
312 }
314 _current = affine;
315 _changed = true;
316 _updateHandles();
317 }
319 void Inkscape::SelTrans::ungrab()
320 {
321 g_return_if_fail(_grabbed);
323 Inkscape::Selection *selection = SP_DT_SELECTION(_desktop);
324 bool updh = true;
325 if (!_empty && _changed) {
326 sp_selection_apply_affine(selection, _current, (_show == SHOW_OUTLINE)? true : false);
327 _center *= _current;
328 _center_is_set = true;
330 // If dragging showed content live, sp_selection_apply_affine cannot change the centers
331 // appropriately - it does not know the original positions of the centers (all objects already have
332 // the new bboxes). So we need to reset the centers from our saved array.
333 if (_show != SHOW_OUTLINE && !_current.is_translation()) {
334 for (unsigned i = 0; i < _items_centers.size(); i++) {
335 SPItem *currentItem = _items_centers[i].first;
336 if (currentItem->isCenterSet()) { // only if it's already set
337 currentItem->setCenter (_items_centers[i].second * _current);
338 SP_OBJECT(currentItem)->updateRepr();
339 }
340 }
341 }
343 sp_document_done(SP_DT_DOCUMENT(_desktop));
344 updh = false;
345 }
347 for (unsigned i = 0; i < _items.size(); i++) {
348 sp_object_unref(SP_OBJECT(_items[i].first), NULL);
349 }
350 _items.clear();
351 _items_centers.clear();
353 _grabbed = false;
354 _show_handles = true;
356 sp_canvas_item_hide(_norm);
357 sp_canvas_item_hide(_grip);
359 if (_show == SHOW_OUTLINE) {
360 for (int i = 0; i < 4; i++)
361 sp_canvas_item_hide(_l[i]);
362 }
364 _updateVolatileState();
365 if (updh) {
366 _updateHandles();
367 }
368 if (_stamp_cache) {
369 g_slist_free(_stamp_cache);
370 _stamp_cache = NULL;
371 }
373 _message_context.clear();
374 }
376 /* fixme: This is really bad, as we compare positions for each stamp (Lauris) */
377 /* fixme: IMHO the best way to keep sort cache would be to implement timestamping at last */
379 void Inkscape::SelTrans::stamp()
380 {
381 Inkscape::Selection *selection = SP_DT_SELECTION(_desktop);
383 /* stamping mode */
384 if (!_empty) {
385 GSList *l;
386 if (_stamp_cache) {
387 l = _stamp_cache;
388 } else {
389 /* Build cache */
390 l = g_slist_copy((GSList *) selection->itemList());
391 l = g_slist_sort(l, (GCompareFunc) sp_object_compare_position);
392 _stamp_cache = l;
393 }
395 while (l) {
396 SPItem *original_item = SP_ITEM(l->data);
397 Inkscape::XML::Node *original_repr = SP_OBJECT_REPR(original_item);
399 // remember the position of the item
400 gint pos = original_repr->position();
401 // remember parent
402 Inkscape::XML::Node *parent = sp_repr_parent(original_repr);
404 Inkscape::XML::Node *copy_repr = original_repr->duplicate();
406 // add the new repr to the parent
407 parent->appendChild(copy_repr);
408 // move to the saved position
409 copy_repr->setPosition(pos > 0 ? pos : 0);
411 SPItem *copy_item = (SPItem *) SP_DT_DOCUMENT(_desktop)->getObjectByRepr(copy_repr);
413 NR::Matrix const *new_affine;
414 if (_show == SHOW_OUTLINE) {
415 NR::Matrix const i2d(sp_item_i2d_affine(original_item));
416 NR::Matrix const i2dnew( i2d * _current );
417 sp_item_set_i2d_affine(copy_item, i2dnew);
418 new_affine = ©_item->transform;
419 } else {
420 new_affine = &original_item->transform;
421 }
423 sp_item_write_transform(copy_item, copy_repr, *new_affine);
425 Inkscape::GC::release(copy_repr);
426 l = l->next;
427 }
428 sp_document_done(SP_DT_DOCUMENT(_desktop));
429 }
430 }
432 void Inkscape::SelTrans::_updateHandles()
433 {
434 if ( !_show_handles || _empty )
435 {
436 sp_remove_handles(_shandle, 8);
437 sp_remove_handles(_rhandle, 8);
438 sp_remove_handles(&_chandle, 1);
439 return;
440 }
442 // center handle
443 if ( _chandle == NULL ) {
444 _chandle = sp_knot_new(_desktop);
445 g_object_set(G_OBJECT(_chandle),
446 "anchor", handle_center.anchor,
447 "shape", SP_CTRL_SHAPE_BITMAP,
448 "size", 13,
449 "mode", SP_CTRL_MODE_XOR,
450 "fill", 0x00000000,
451 "fill_mouseover", 0x00000000,
452 "stroke", 0x000000ff,
453 "stroke_mouseover", 0xff0000b0,
454 "pixbuf", handles[handle_center.control],
455 "tip", _("<b>Center</b> of rotation and skewing: drag to reposition; scaling with Shift also uses this center"),
456 NULL);
457 g_signal_connect(G_OBJECT(_chandle), "request",
458 G_CALLBACK(sp_sel_trans_handle_request), (gpointer) &handle_center);
459 g_signal_connect(G_OBJECT(_chandle), "moved",
460 G_CALLBACK(sp_sel_trans_handle_new_event), (gpointer) &handle_center);
461 g_signal_connect(G_OBJECT(_chandle), "grabbed",
462 G_CALLBACK(sp_sel_trans_handle_grab), (gpointer) &handle_center);
463 g_signal_connect(G_OBJECT(_chandle), "ungrabbed",
464 G_CALLBACK(sp_sel_trans_handle_ungrab), (gpointer) &handle_center);
465 g_signal_connect(G_OBJECT(_chandle), "clicked",
466 G_CALLBACK(sp_sel_trans_handle_click), (gpointer) &handle_center);
467 }
469 sp_remove_handles(&_chandle, 1);
470 if ( _state == STATE_SCALE ) {
471 sp_remove_handles(_rhandle, 8);
472 _showHandles(_shandle, handles_scale, 8,
473 _("<b>Squeeze or stretch</b> selection; with <b>Ctrl</b> to scale uniformly; with <b>Shift</b> to scale around rotation center"),
474 _("<b>Scale</b> selection; with <b>Ctrl</b> to scale uniformly; with <b>Shift</b> to scale around rotation center"));
475 } else {
476 sp_remove_handles(_shandle, 8);
477 _showHandles(_rhandle, handles_rotate, 8,
478 _("<b>Skew</b> selection; with <b>Ctrl</b> to snap angle; with <b>Shift</b> to skew around the opposite side"),
479 _("<b>Rotate</b> selection; with <b>Ctrl</b> to snap angle; with <b>Shift</b> to rotate around the opposite corner"));
480 }
482 if (!_center_is_set) {
483 // Extract the position of the center from the first selected object
484 GSList *items = (GSList *) _desktop->selection->itemList();
485 if (items) {
486 SPItem *first = reinterpret_cast<SPItem*>(g_slist_last(items)->data); // from the first item in selection
487 if (first->isCenterSet()) { // only if set explicitly
488 _center = first->getCenter();
489 } else {
490 _center = _box.midpoint();
491 }
492 } else {
493 _center = _box.midpoint();
494 }
495 _center_is_set = true;
496 }
498 if ( _state == STATE_SCALE ) {
499 sp_knot_hide(_chandle);
500 } else {
501 sp_knot_show(_chandle);
502 sp_knot_moveto(_chandle, &_center);
503 }
504 }
506 void Inkscape::SelTrans::_updateVolatileState()
507 {
508 Inkscape::Selection *selection = SP_DT_SELECTION(_desktop);
509 _empty = selection->isEmpty();
511 if (_empty) {
512 return;
513 }
515 _box = selection->bounds();
516 if (_box.isEmpty()) {
517 _empty = true;
518 return;
519 }
521 _strokewidth = stroke_average_width (selection->itemList());
523 _current.set_identity();
524 }
526 static void sp_remove_handles(SPKnot *knot[], gint num)
527 {
528 for (int i = 0; i < num; i++) {
529 if (knot[i] != NULL) {
530 sp_knot_hide(knot[i]);
531 }
532 }
533 }
535 void Inkscape::SelTrans::_showHandles(SPKnot *knot[], SPSelTransHandle const handle[], gint num,
536 gchar const *even_tip, gchar const *odd_tip)
537 {
538 g_return_if_fail( !_empty );
540 for (int i = 0; i < num; i++) {
541 if (knot[i] == NULL) {
542 knot[i] = sp_knot_new(_desktop);
543 g_object_set(G_OBJECT(knot[i]),
544 "anchor", handle[i].anchor,
545 "shape", SP_CTRL_SHAPE_BITMAP,
546 "size", 13,
547 "mode", SP_KNOT_MODE_XOR,
548 "fill", 0x000000ff, // inversion
549 "fill_mouseover", 0x00ff6600, // green
550 "stroke", 0x000000ff, // inversion
551 "stroke_mouseover", 0x000000ff, // inversion
552 "pixbuf", handles[handle[i].control],
553 "tip", i % 2 ? even_tip : odd_tip,
554 NULL);
556 g_signal_connect(G_OBJECT(knot[i]), "request",
557 G_CALLBACK(sp_sel_trans_handle_request), (gpointer) &handle[i]);
558 g_signal_connect(G_OBJECT(knot[i]), "moved",
559 G_CALLBACK(sp_sel_trans_handle_new_event), (gpointer) &handle[i]);
560 g_signal_connect(G_OBJECT(knot[i]), "grabbed",
561 G_CALLBACK(sp_sel_trans_handle_grab), (gpointer) &handle[i]);
562 g_signal_connect(G_OBJECT(knot[i]), "ungrabbed",
563 G_CALLBACK(sp_sel_trans_handle_ungrab), (gpointer) &handle[i]);
564 g_signal_connect(G_OBJECT(knot[i]), "event", G_CALLBACK(sp_seltrans_handle_event), (gpointer) &handle[i]);
565 }
566 sp_knot_show(knot[i]);
568 NR::Point const handle_pt(handle[i].x, handle[i].y);
569 NR::Point p( _box.min()
570 + ( _box.dimensions()
571 * NR::scale(handle_pt) ) );
573 sp_knot_moveto(knot[i], &p);
574 }
575 }
577 static void sp_sel_trans_handle_grab(SPKnot *knot, guint state, gpointer data)
578 {
579 SP_SELECT_CONTEXT(knot->desktop->event_context)->_seltrans->handleGrab(
580 knot, state, *(SPSelTransHandle const *) data
581 );
582 }
584 static void sp_sel_trans_handle_ungrab(SPKnot *knot, guint state, gpointer data)
585 {
586 SP_SELECT_CONTEXT(knot->desktop->event_context)->_seltrans->ungrab();
587 }
589 static void sp_sel_trans_handle_new_event(SPKnot *knot, NR::Point *position, guint state, gpointer data)
590 {
591 SP_SELECT_CONTEXT(knot->desktop->event_context)->_seltrans->handleNewEvent(
592 knot, position, state, *(SPSelTransHandle const *) data
593 );
594 }
596 static gboolean sp_sel_trans_handle_request(SPKnot *knot, NR::Point *position, guint state, gboolean *data)
597 {
598 return SP_SELECT_CONTEXT(knot->desktop->event_context)->_seltrans->handleRequest(
599 knot, position, state, *(SPSelTransHandle const *) data
600 );
601 }
603 static void sp_sel_trans_handle_click(SPKnot *knot, guint state, gpointer data)
604 {
605 SP_SELECT_CONTEXT(knot->desktop->event_context)->_seltrans->handleClick(
606 knot, state, *(SPSelTransHandle const *) data
607 );
608 }
610 void Inkscape::SelTrans::handleClick(SPKnot *knot, guint state, SPSelTransHandle const &handle)
611 {
612 switch (handle.anchor) {
613 case GTK_ANCHOR_CENTER:
614 if (state & GDK_SHIFT_MASK) {
615 // Unset the center position for all selected items
616 for (GSList const *l = _desktop->selection->itemList(); l; l = l->next) {
617 SPItem *it = (SPItem*)sp_object_ref(SP_OBJECT(l->data), NULL);
618 it->unsetCenter();
619 SP_OBJECT(it)->updateRepr();
620 }
621 sp_document_maybe_done (SP_DT_DOCUMENT(_desktop), "center::unset");
622 }
623 break;
624 default:
625 break;
626 }
627 }
629 void Inkscape::SelTrans::handleGrab(SPKnot *knot, guint state, SPSelTransHandle const &handle)
630 {
631 switch (handle.anchor) {
632 case GTK_ANCHOR_CENTER:
633 g_object_set(G_OBJECT(_grip),
634 "shape", SP_CTRL_SHAPE_BITMAP,
635 "size", 13.0,
636 NULL);
637 sp_canvas_item_show(_grip);
638 break;
639 default:
640 g_object_set(G_OBJECT(_grip),
641 "shape", SP_CTRL_SHAPE_CROSS,
642 "size", 7.0,
643 NULL);
644 sp_canvas_item_show(_norm);
645 sp_canvas_item_show(_grip);
647 break;
648 }
650 grab(sp_knot_position(knot), handle.x, handle.y, FALSE);
651 }
654 void Inkscape::SelTrans::handleNewEvent(SPKnot *knot, NR::Point *position, guint state, SPSelTransHandle const &handle)
655 {
656 if (!SP_KNOT_IS_GRABBED(knot)) {
657 return;
658 }
660 // in case items have been unhooked from the document, don't
661 // try to continue processing events for them.
662 for (unsigned int i = 0; i < _items.size(); i++) {
663 if (!SP_OBJECT_DOCUMENT(SP_OBJECT(_items[i].first)) ) {
664 return;
665 }
666 }
668 handle.action(this, handle, *position, state);
669 }
672 gboolean Inkscape::SelTrans::handleRequest(SPKnot *knot, NR::Point *position, guint state, SPSelTransHandle const &handle)
673 {
674 if (!SP_KNOT_IS_GRABBED(knot)) {
675 return TRUE;
676 }
678 knot->desktop->set_coordinate_status(*position);
679 knot->desktop->setPosition(*position);
682 if (state & GDK_MOD1_MASK) {
683 *position = _point + ( *position - _point ) / 10;
684 }
686 if (!(state & GDK_SHIFT_MASK) == !(_state == STATE_ROTATE)) {
687 _origin = _opposite;
688 } else {
689 _origin = _center;
690 }
691 if (handle.request(this, handle, *position, state)) {
692 sp_knot_set_position(knot, position, state);
693 SP_CTRL(_grip)->moveto(*position);
694 SP_CTRL(_norm)->moveto(_origin);
695 }
697 return TRUE;
698 }
701 void Inkscape::SelTrans::_selChanged(Inkscape::Selection *selection)
702 {
703 if (!_grabbed) {
704 _updateVolatileState();
705 _center_is_set = false; // center(s) may have changed
706 _updateHandles();
707 }
708 }
710 void Inkscape::SelTrans::_selModified(Inkscape::Selection *selection, guint flags)
711 {
712 if (!_grabbed) {
713 _updateVolatileState();
715 // reset internal flag
716 _changed = false;
718 _center_is_set = false; // center(s) may have changed
720 _updateHandles();
721 }
722 }
724 /*
725 * handlers for handle move-request
726 */
728 /** Returns -1 or 1 according to the sign of x. Returns 1 for 0 and NaN. */
729 static double sign(double const x)
730 {
731 return ( x < 0
732 ? -1
733 : 1 );
734 }
736 gboolean sp_sel_trans_scale_request(Inkscape::SelTrans *seltrans,
737 SPSelTransHandle const &, NR::Point &pt, guint state)
738 {
739 return seltrans->scaleRequest(pt, state);
740 }
742 gboolean sp_sel_trans_stretch_request(Inkscape::SelTrans *seltrans,
743 SPSelTransHandle const &handle, NR::Point &pt, guint state)
744 {
745 return seltrans->stretchRequest(handle, pt, state);
746 }
748 gboolean sp_sel_trans_skew_request(Inkscape::SelTrans *seltrans,
749 SPSelTransHandle const &handle, NR::Point &pt, guint state)
750 {
751 return seltrans->skewRequest(handle, pt, state);
752 }
754 gboolean sp_sel_trans_rotate_request(Inkscape::SelTrans *seltrans,
755 SPSelTransHandle const &, NR::Point &pt, guint state)
756 {
757 return seltrans->rotateRequest(pt, state);
758 }
760 gboolean sp_sel_trans_center_request(Inkscape::SelTrans *seltrans,
761 SPSelTransHandle const &, NR::Point &pt, guint state)
762 {
763 return seltrans->centerRequest(pt, state);
764 }
766 gboolean Inkscape::SelTrans::scaleRequest(NR::Point &pt, guint state)
767 {
768 using NR::X;
769 using NR::Y;
771 NR::Point d = _point - _origin;
772 NR::scale s(0, 0);
774 /* Work out the new scale factors `s' */
775 for ( unsigned int i = 0 ; i < 2 ; i++ ) {
776 if ( fabs(d[i]) > 0.001 ) {
777 s[i] = ( pt[i] - _origin[i] ) / d[i];
778 if ( fabs(s[i]) < 1e-9 ) {
779 s[i] = 1e-9;
780 }
781 }
782 }
784 /* Get a STL list of the selected items.
785 ** FIXME: this should probably be done by Inkscape::Selection.
786 */
787 std::list<SPItem const*> it;
788 for (GSList const *i = _selection->itemList(); i != NULL; i = i->next) {
789 it.push_back(reinterpret_cast<SPItem*>(i->data));
790 }
792 if ((state & GDK_CONTROL_MASK) || _desktop->isToolboxButtonActive ("lock")) {
793 /* Scale is locked to a 1:1 aspect ratio, so that s[X] must be made to equal s[Y] */
795 NR::Dim2 locked_dim;
797 /* Lock aspect ratio, using the smaller of the x and y factors */
798 if (fabs(s[NR::X]) > fabs(s[NR::Y])) {
799 s[NR::X] = fabs(s[NR::Y]) * sign(s[NR::X]);
800 locked_dim = NR::X;
801 } else {
802 s[NR::Y] = fabs(s[NR::X]) * sign(s[NR::Y]);
803 locked_dim = NR::Y;
804 }
806 /* Snap the scale factor */
807 std::pair<double, bool> bb = namedview_vector_snap_list(_desktop->namedview,
808 Snapper::BBOX_POINT, _bbox_points,
809 _origin, s, it);
810 std::pair<double, bool> sn = namedview_vector_snap_list(_desktop->namedview,
811 Snapper::SNAP_POINT, _snap_points,
812 _origin, s, it);
814 double bd = bb.second ? fabs(bb.first - s[locked_dim]) : NR_HUGE;
815 double sd = sn.second ? fabs(sn.first - s[locked_dim]) : NR_HUGE;
816 double r = (bd < sd) ? bb.first : sn.first;
818 for ( unsigned int i = 0 ; i < 2 ; i++ ) {
819 s[i] = r * sign(s[i]);
820 }
822 } else {
823 /* Scale aspect ratio is unlocked */
824 for ( unsigned int i = 0 ; i < 2 ; i++ ) {
825 std::pair<double, bool> bb = namedview_dim_snap_list_scale(_desktop->namedview,
826 Snapper::BBOX_POINT, _bbox_points,
827 _origin, s[i], NR::Dim2(i), it);
828 std::pair<double, bool> sn = namedview_dim_snap_list_scale(_desktop->namedview,
829 Snapper::SNAP_POINT, _snap_points,
830 _origin, s[i], NR::Dim2(i), it);
832 /* Pick the snap that puts us closest to the original scale */
833 NR::Coord bd = bb.second ? fabs(bb.first - s[i]) : NR_HUGE;
834 NR::Coord sd = sn.second ? fabs(sn.first - s[i]) : NR_HUGE;
835 s[i] = (bd < sd) ? bb.first : sn.first;
836 }
837 }
839 /* Update the knot position */
840 pt = ( _point - _origin ) * s + _origin;
842 /* Status text */
843 _message_context.setF(Inkscape::NORMAL_MESSAGE,
844 _("<b>Scale</b>: %0.2f%% x %0.2f%%; with <b>Ctrl</b> to lock ratio"),
845 100 * s[NR::X], 100 * s[NR::Y]);
847 return TRUE;
848 }
850 gboolean Inkscape::SelTrans::stretchRequest(SPSelTransHandle const &handle, NR::Point &pt, guint state)
851 {
852 using NR::X;
853 using NR::Y;
855 NR::Dim2 axis, perp;
857 switch (handle.cursor) {
858 case GDK_TOP_SIDE:
859 case GDK_BOTTOM_SIDE:
860 axis = NR::Y;
861 perp = NR::X;
862 break;
863 case GDK_LEFT_SIDE:
864 case GDK_RIGHT_SIDE:
865 axis = NR::X;
866 perp = NR::Y;
867 break;
868 default:
869 g_assert_not_reached();
870 return TRUE;
871 };
873 if ( fabs( _point[axis] - _origin[axis] ) < 1e-15 ) {
874 return FALSE;
875 }
877 NR::scale s(1, 1);
878 s[axis] = ( ( pt[axis] - _origin[axis] )
879 / ( _point[axis] - _origin[axis] ) );
880 if ( fabs(s[axis]) < 1e-15 ) {
881 s[axis] = 1e-15;
882 }
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 ) {
893 s[perp] = fabs(s[axis]);
895 std::pair<double, bool> sn = namedview_vector_snap_list(_desktop->namedview,
896 Snapper::BBOX_POINT,
897 _bbox_points, _origin, s, it);
898 std::pair<double, bool> bb = namedview_vector_snap_list(_desktop->namedview,
899 Snapper::SNAP_POINT,
900 _snap_points, _origin, s, it);
902 double bd = bb.second ? fabs(bb.first - s[axis]) : NR_HUGE;
903 double sd = sn.second ? fabs(sn.first - s[axis]) : NR_HUGE;
904 double ratio = (bd < sd) ? bb.first : sn.first;
906 s[axis] = fabs(ratio) * sign(s[axis]);
907 s[perp] = fabs(s[axis]);
908 } else {
909 std::pair<NR::Coord, bool> bb = namedview_dim_snap_list_scale(_desktop->namedview, Snapper::BBOX_POINT,
910 _bbox_points, _origin,
911 s[axis], axis, it);
912 std::pair<NR::Coord, bool> sn = namedview_dim_snap_list_scale(_desktop->namedview, Snapper::SNAP_POINT,
913 _snap_points, _origin,
914 s[axis], axis, it);
916 /* Pick the snap that puts us closest to the original scale */
917 NR::Coord bd = bb.second ? fabs(bb.first - s[axis]) : NR_HUGE;
918 NR::Coord sd = sn.second ? fabs(sn.first - s[axis]) : NR_HUGE;
919 s[axis] = (bd < sd) ? bb.first : sn.first;
920 }
922 pt = ( _point - _origin ) * NR::scale(s) + _origin;
923 if (isNaN(pt[X] + pt[Y])) {
924 g_warning("point=(%g, %g), norm=(%g, %g), s=(%g, %g)\n",
925 _point[X], _point[Y], _origin[X], _origin[Y], s[X], s[Y]);
926 }
928 // status text
929 _message_context.setF(Inkscape::NORMAL_MESSAGE,
930 _("<b>Scale</b>: %0.2f%% x %0.2f%%; with <b>Ctrl</b> to lock ratio"),
931 100 * s[NR::X], 100 * s[NR::Y]);
933 return TRUE;
934 }
936 gboolean Inkscape::SelTrans::skewRequest(SPSelTransHandle const &handle, NR::Point &pt, guint state)
937 {
938 using NR::X;
939 using NR::Y;
941 if (handle.cursor != GDK_SB_V_DOUBLE_ARROW && handle.cursor != GDK_SB_H_DOUBLE_ARROW) {
942 return FALSE;
943 }
945 NR::Dim2 dim_a;
946 NR::Dim2 dim_b;
947 if (handle.cursor == GDK_SB_V_DOUBLE_ARROW) {
948 dim_a = X;
949 dim_b = Y;
950 } else {
951 dim_a = Y;
952 dim_b = X;
953 }
955 double skew[2];
956 double s[2] = { 1.0, 1.0 };
958 if (fabs(_point[dim_a] - _origin[dim_a]) < NR_EPSILON) {
959 return FALSE;
960 }
962 skew[dim_a] = ( pt[dim_b] - _point[dim_b] ) / ( _point[dim_a] - _origin[dim_a] );
964 s[dim_a] = ( pt[dim_a] - _origin[dim_a] ) / ( _point[dim_a] - _origin[dim_a] );
966 if ( fabs(s[dim_a]) < 1 ) {
967 s[dim_a] = sign(s[dim_a]);
968 } else {
969 s[dim_a] = floor( s[dim_a] + 0.5 );
970 }
972 double radians = atan(skew[dim_a] / s[dim_a]);
974 if (state & GDK_CONTROL_MASK) {
976 int snaps = prefs_get_int_attribute("options.rotationsnapsperpi", "value", 12);
978 if (snaps) {
979 double sections = floor( radians * snaps / M_PI + .5 );
980 if (fabs(sections) >= snaps / 2) sections = sign(sections) * (snaps / 2 - 1);
981 radians = ( M_PI / snaps ) * sections;
982 }
983 skew[dim_a] = tan(radians) * s[dim_a];
984 } else {
985 skew[dim_a] = namedview_dim_snap_list_skew(_desktop->namedview,
986 Snapper::SNAP_POINT, _snap_points,
987 _origin, skew[dim_a], dim_b);
988 }
990 pt[dim_b] = ( _point[dim_a] - _origin[dim_a] ) * skew[dim_a] + _point[dim_b];
991 pt[dim_a] = ( _point[dim_a] - _origin[dim_a] ) * s[dim_a] + _origin[dim_a];
993 /* status text */
994 double degrees = 180 / M_PI * radians;
995 if (degrees > 180) degrees -= 360;
996 if (degrees < -180) degrees += 360;
998 _message_context.setF(Inkscape::NORMAL_MESSAGE,
999 // TRANSLATORS: don't modify the first ";"
1000 // (it will NOT be displayed as ";" - only the second one will be)
1001 _("<b>Skew</b>: %0.2f°; with <b>Ctrl</b> to snap angle"),
1002 degrees);
1004 return TRUE;
1005 }
1007 gboolean Inkscape::SelTrans::rotateRequest(NR::Point &pt, guint state)
1008 {
1009 int snaps = prefs_get_int_attribute("options.rotationsnapsperpi", "value", 12);
1011 // rotate affine in rotate
1012 NR::Point const d1 = _point - _origin;
1013 NR::Point const d2 = pt - _origin;
1015 NR::Coord const h1 = NR::L2(d1);
1016 if (h1 < 1e-15) return FALSE;
1017 NR::Point q1 = d1 / h1;
1018 NR::Coord const h2 = NR::L2(d2);
1019 if (fabs(h2) < 1e-15) return FALSE;
1020 NR::Point q2 = d2 / h2;
1022 double radians;
1023 if (state & GDK_CONTROL_MASK) {
1024 /* Have to restrict movement. */
1025 double cos_t = NR::dot(q1, q2);
1026 double sin_t = NR::dot(NR::rot90(q1), q2);
1027 radians = atan2(sin_t, cos_t);
1028 if (snaps) {
1029 radians = ( M_PI / snaps ) * floor( radians * snaps / M_PI + .5 );
1030 }
1031 q1 = NR::Point(1, 0);
1032 q2 = NR::Point(cos(radians), sin(radians));
1033 } else {
1034 radians = atan2(NR::dot(NR::rot90(d1), d2),
1035 NR::dot(d1, d2));
1036 }
1038 NR::rotate const r1(q1);
1039 NR::rotate const r2(q2);
1040 pt = _point * NR::translate(-_origin) * ( r2 / r1 ) * NR::translate(_origin);
1042 /* status text */
1043 double degrees = 180 / M_PI * radians;
1044 if (degrees > 180) degrees -= 360;
1045 if (degrees < -180) degrees += 360;
1047 _message_context.setF(Inkscape::NORMAL_MESSAGE,
1048 // TRANSLATORS: don't modify the first ";"
1049 // (it will NOT be displayed as ";" - only the second one will be)
1050 _("<b>Rotate</b>: %0.2f°; with <b>Ctrl</b> to snap angle"), degrees);
1052 return TRUE;
1053 }
1055 gboolean Inkscape::SelTrans::centerRequest(NR::Point &pt, guint state)
1056 {
1057 using NR::X;
1058 using NR::Y;
1060 SnapManager const m(_desktop->namedview);
1061 pt = m.freeSnap(Snapper::SNAP_POINT, pt, NULL).getPoint();
1063 if (state & GDK_CONTROL_MASK) {
1064 if ( fabs(_point[X] - pt[X]) > fabs(_point[Y] - pt[Y]) ) {
1065 pt[Y] = _point[Y];
1066 } else {
1067 pt[X] = _point[X];
1068 }
1069 }
1071 if (!(state & GDK_SHIFT_MASK)) {
1072 // screen pixels to snap center to bbox
1073 #define SNAP_DIST 5
1074 // FIXME: take from prefs
1075 double snap_dist = SNAP_DIST / _desktop->current_zoom();
1077 for (int i = 0; i < 2; i++) {
1079 if (fabs(pt[i] - _box.min()[i]) < snap_dist) {
1080 pt[i] = _box.min()[i];
1081 }
1082 if (fabs(pt[i] - _box.midpoint()[i]) < snap_dist) {
1083 pt[i] = _box.midpoint()[i];
1084 }
1085 if (fabs(pt[i] - _box.max()[i]) < snap_dist) {
1086 pt[i] = _box.max()[i];
1087 }
1088 }
1089 }
1091 // status text
1092 GString *xs = SP_PX_TO_METRIC_STRING(pt[X], _desktop->namedview->getDefaultMetric());
1093 GString *ys = SP_PX_TO_METRIC_STRING(pt[Y], _desktop->namedview->getDefaultMetric());
1094 _message_context.setF(Inkscape::NORMAL_MESSAGE, _("Move <b>center</b> to %s, %s"), xs->str, ys->str);
1095 g_string_free(xs, FALSE);
1096 g_string_free(ys, FALSE);
1098 return TRUE;
1099 }
1101 /*
1102 * handlers for handle movement
1103 *
1104 */
1106 void sp_sel_trans_stretch(Inkscape::SelTrans *seltrans, SPSelTransHandle const &handle, NR::Point &pt, guint state)
1107 {
1108 seltrans->stretch(handle, pt, state);
1109 }
1111 void sp_sel_trans_scale(Inkscape::SelTrans *seltrans, SPSelTransHandle const &, NR::Point &pt, guint state)
1112 {
1113 seltrans->scale(pt, state);
1114 }
1116 void sp_sel_trans_skew(Inkscape::SelTrans *seltrans, SPSelTransHandle const &handle, NR::Point &pt, guint state)
1117 {
1118 seltrans->skew(handle, pt, state);
1119 }
1121 void sp_sel_trans_rotate(Inkscape::SelTrans *seltrans, SPSelTransHandle const &, NR::Point &pt, guint state)
1122 {
1123 seltrans->rotate(pt, state);
1124 }
1126 void Inkscape::SelTrans::stretch(SPSelTransHandle const &handle, NR::Point &pt, guint state)
1127 {
1128 using NR::X;
1129 using NR::Y;
1131 NR::Dim2 dim;
1132 switch (handle.cursor) {
1133 case GDK_LEFT_SIDE:
1134 case GDK_RIGHT_SIDE:
1135 dim = X;
1136 break;
1137 case GDK_TOP_SIDE:
1138 case GDK_BOTTOM_SIDE:
1139 dim = Y;
1140 break;
1141 default:
1142 g_assert_not_reached();
1143 abort();
1144 break;
1145 }
1147 NR::Point const scale_origin(_origin);
1148 double const offset = _point[dim] - scale_origin[dim];
1149 if (!( fabs(offset) >= 1e-15 )) {
1150 return;
1151 }
1152 NR::scale s(1, 1);
1153 s[dim] = ( pt[dim] - scale_origin[dim] ) / offset;
1154 if (isNaN(s[dim])) {
1155 g_warning("s[dim]=%g, pt[dim]=%g, scale_origin[dim]=%g, point[dim]=%g\n",
1156 s[dim], pt[dim], scale_origin[dim], _point[dim]);
1157 }
1158 if (!( fabs(s[dim]) >= 1e-15 )) {
1159 s[dim] = 1e-15;
1160 }
1161 if (state & GDK_CONTROL_MASK) {
1162 /* Preserve aspect ratio, but never flip in the dimension not being edited. */
1163 s[!dim] = fabs(s[dim]);
1164 }
1166 NR::Point new_bbox_min = _box.min() * (NR::translate(-scale_origin) * NR::Matrix(s) * NR::translate(scale_origin));
1167 NR::Point new_bbox_max = _box.max() * (NR::translate(-scale_origin) * NR::Matrix(s) * NR::translate(scale_origin));
1169 int transform_stroke = prefs_get_int_attribute ("options.transform", "stroke", 1);
1170 NR::Matrix scaler = get_scale_transform_with_stroke (_box, _strokewidth, transform_stroke,
1171 new_bbox_min[NR::X], new_bbox_min[NR::Y], new_bbox_max[NR::X], new_bbox_max[NR::Y]);
1173 transform(scaler, NR::Point(0, 0)); // we have already accounted for origin, so pass 0,0
1174 }
1176 void Inkscape::SelTrans::scale(NR::Point &pt, guint state)
1177 {
1178 NR::Point const offset = _point - _origin;
1180 NR::scale s (1, 1);
1181 for (int i = NR::X; i <= NR::Y; i++) {
1182 if (fabs(offset[i]) > 1e-9)
1183 s[i] = (pt[i] - _origin[i]) / offset[i];
1184 if (fabs(s[i]) < 1e-9)
1185 s[i] = 1e-9;
1186 }
1187 NR::Point new_bbox_min = _box.min() * (NR::translate(-_origin) * NR::Matrix(s) * NR::translate(_origin));
1188 NR::Point new_bbox_max = _box.max() * (NR::translate(-_origin) * NR::Matrix(s) * NR::translate(_origin));
1190 int transform_stroke = prefs_get_int_attribute ("options.transform", "stroke", 1);
1191 NR::Matrix scaler = get_scale_transform_with_stroke (_box, _strokewidth, transform_stroke,
1192 new_bbox_min[NR::X], new_bbox_min[NR::Y], new_bbox_max[NR::X], new_bbox_max[NR::Y]);
1194 transform(scaler, NR::Point(0, 0)); // we have already accounted for origin, so pass 0,0
1195 }
1197 void Inkscape::SelTrans::skew(SPSelTransHandle const &handle, NR::Point &pt, guint state)
1198 {
1199 NR::Point const offset = _point - _origin;
1201 unsigned dim;
1202 switch (handle.cursor) {
1203 case GDK_SB_H_DOUBLE_ARROW:
1204 dim = NR::Y;
1205 break;
1206 case GDK_SB_V_DOUBLE_ARROW:
1207 dim = NR::X;
1208 break;
1209 default:
1210 g_assert_not_reached();
1211 abort();
1212 break;
1213 }
1214 if (fabs(offset[dim]) < 1e-15) {
1215 return;
1216 }
1217 NR::Matrix skew = NR::identity();
1218 skew[2*dim + dim] = (pt[dim] - _origin[dim]) / offset[dim];
1219 skew[2*dim + (1-dim)] = (pt[1-dim] - _point[1-dim]) / offset[dim];
1220 skew[2*(1-dim) + (dim)] = 0;
1221 skew[2*(1-dim) + (1-dim)] = 1;
1223 for (int i = 0; i < 2; i++) {
1224 if (fabs(skew[3*i]) < 1e-15) {
1225 skew[3*i] = 1e-15;
1226 }
1227 }
1228 transform(skew, _origin);
1229 }
1231 void Inkscape::SelTrans::rotate(NR::Point &pt, guint state)
1232 {
1233 NR::Point const offset = _point - _origin;
1235 NR::Coord const h1 = NR::L2(offset);
1236 if (h1 < 1e-15) {
1237 return;
1238 }
1239 NR::Point const q1 = offset / h1;
1240 NR::Coord const h2 = NR::L2( pt - _origin );
1241 if (h2 < 1e-15) {
1242 return;
1243 }
1244 NR::Point const q2 = (pt - _origin) / h2;
1245 NR::rotate const r1(q1);
1246 NR::rotate const r2(q2);
1248 NR::Matrix rotate( r2 / r1 );
1249 transform(rotate, _origin);
1250 }
1252 void sp_sel_trans_center(Inkscape::SelTrans *seltrans, SPSelTransHandle const &, NR::Point &pt, guint state)
1253 {
1254 seltrans->setCenter(pt);
1255 }
1258 void Inkscape::SelTrans::moveTo(NR::Point const &xy, guint state)
1259 {
1260 SnapManager const m(_desktop->namedview);
1262 /* The amount that we've moved by during this drag */
1263 NR::Point dxy = xy - _point;
1265 /* Get a STL list of the selected items.
1266 ** FIXME: this should probably be done by Inkscape::Selection.
1267 */
1268 std::list<SPItem const*> it;
1269 for (GSList const *i = _selection->itemList(); i != NULL; i = i->next) {
1270 it.push_back(reinterpret_cast<SPItem*>(i->data));
1271 }
1273 bool const alt = (state & GDK_MOD1_MASK);
1274 bool const control = (state & GDK_CONTROL_MASK);
1275 bool const shift = (state & GDK_SHIFT_MASK);
1277 if (alt) {
1279 /* Alt pressed means keep offset: snap the moved distance to the grid.
1280 ** FIXME: this will snap to more than just the grid, nowadays.
1281 */
1283 dxy = m.freeSnap(Snapper::SNAP_POINT, dxy, NULL).getPoint();
1285 } else if (!shift) {
1287 /* We're snapping to things, possibly with a constraint to horizontal or
1288 ** vertical movement. Obtain a list of possible translations and then
1289 ** pick the smallest.
1290 */
1292 /* This will be our list of possible translations */
1293 std::list<std::pair<NR::Point, bool> > s;
1295 if (control) {
1297 /* Snap to things, and also constrain to horizontal or vertical movement */
1299 for (unsigned int dim = 0; dim < 2; dim++) {
1300 s.push_back(m.constrainedSnapTranslation(Inkscape::Snapper::BBOX_POINT,
1301 _bbox_points,
1302 component_vectors[dim], it, dxy));
1303 s.push_back(m.constrainedSnapTranslation(Inkscape::Snapper::SNAP_POINT,
1304 _snap_points,
1305 component_vectors[dim], it, dxy));
1306 }
1308 } else {
1310 /* Snap to things with no constraint */
1312 s.push_back(m.freeSnapTranslation(Inkscape::Snapper::BBOX_POINT,
1313 _bbox_points, it, dxy));
1314 s.push_back(m.freeSnapTranslation(Inkscape::Snapper::SNAP_POINT,
1315 _snap_points, it, dxy));
1316 }
1318 /* Pick one */
1319 NR::Coord best = NR_HUGE;
1320 for (std::list<std::pair<NR::Point, bool> >::const_iterator i = s.begin(); i != s.end(); i++) {
1321 if (i->second) {
1322 NR::Coord const m = NR::L2(i->first);
1323 if (m < best) {
1324 best = m;
1325 dxy = i->first;
1326 }
1327 }
1328 }
1329 }
1331 if (control) {
1332 /* Ensure that the horizontal and vertical constraint has been applied */
1333 if (fabs(dxy[NR::X]) > fabs(dxy[NR::Y])) {
1334 dxy[NR::Y] = 0;
1335 } else {
1336 dxy[NR::X] = 0;
1337 }
1338 }
1340 NR::Matrix const move((NR::translate(dxy)));
1341 NR::Point const norm(0, 0);
1342 transform(move, norm);
1344 // status text
1345 GString *xs = SP_PX_TO_METRIC_STRING(dxy[NR::X], _desktop->namedview->getDefaultMetric());
1346 GString *ys = SP_PX_TO_METRIC_STRING(dxy[NR::Y], _desktop->namedview->getDefaultMetric());
1347 _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);
1348 g_string_free(xs, TRUE);
1349 g_string_free(ys, TRUE);
1350 }
1353 /*
1354 Local Variables:
1355 mode:c++
1356 c-file-style:"stroustrup"
1357 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
1358 indent-tabs-mode:nil
1359 fill-column:99
1360 End:
1361 */
1362 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4 :