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 _center = _desktop->selection->center();
484 _center_is_set = true;
485 }
487 if ( _state == STATE_SCALE ) {
488 sp_knot_hide(_chandle);
489 } else {
490 sp_knot_show(_chandle);
491 sp_knot_moveto(_chandle, &_center);
492 }
493 }
495 void Inkscape::SelTrans::_updateVolatileState()
496 {
497 Inkscape::Selection *selection = SP_DT_SELECTION(_desktop);
498 _empty = selection->isEmpty();
500 if (_empty) {
501 return;
502 }
504 _box = selection->bounds();
505 if (_box.isEmpty()) {
506 _empty = true;
507 return;
508 }
510 _strokewidth = stroke_average_width (selection->itemList());
512 _current.set_identity();
513 }
515 static void sp_remove_handles(SPKnot *knot[], gint num)
516 {
517 for (int i = 0; i < num; i++) {
518 if (knot[i] != NULL) {
519 sp_knot_hide(knot[i]);
520 }
521 }
522 }
524 void Inkscape::SelTrans::_showHandles(SPKnot *knot[], SPSelTransHandle const handle[], gint num,
525 gchar const *even_tip, gchar const *odd_tip)
526 {
527 g_return_if_fail( !_empty );
529 for (int i = 0; i < num; i++) {
530 if (knot[i] == NULL) {
531 knot[i] = sp_knot_new(_desktop);
532 g_object_set(G_OBJECT(knot[i]),
533 "anchor", handle[i].anchor,
534 "shape", SP_CTRL_SHAPE_BITMAP,
535 "size", 13,
536 "mode", SP_KNOT_MODE_XOR,
537 "fill", 0x000000ff, // inversion
538 "fill_mouseover", 0x00ff6600, // green
539 "stroke", 0x000000ff, // inversion
540 "stroke_mouseover", 0x000000ff, // inversion
541 "pixbuf", handles[handle[i].control],
542 "tip", i % 2 ? even_tip : odd_tip,
543 NULL);
545 g_signal_connect(G_OBJECT(knot[i]), "request",
546 G_CALLBACK(sp_sel_trans_handle_request), (gpointer) &handle[i]);
547 g_signal_connect(G_OBJECT(knot[i]), "moved",
548 G_CALLBACK(sp_sel_trans_handle_new_event), (gpointer) &handle[i]);
549 g_signal_connect(G_OBJECT(knot[i]), "grabbed",
550 G_CALLBACK(sp_sel_trans_handle_grab), (gpointer) &handle[i]);
551 g_signal_connect(G_OBJECT(knot[i]), "ungrabbed",
552 G_CALLBACK(sp_sel_trans_handle_ungrab), (gpointer) &handle[i]);
553 g_signal_connect(G_OBJECT(knot[i]), "event", G_CALLBACK(sp_seltrans_handle_event), (gpointer) &handle[i]);
554 }
555 sp_knot_show(knot[i]);
557 NR::Point const handle_pt(handle[i].x, handle[i].y);
558 NR::Point p( _box.min()
559 + ( _box.dimensions()
560 * NR::scale(handle_pt) ) );
562 sp_knot_moveto(knot[i], &p);
563 }
564 }
566 static void sp_sel_trans_handle_grab(SPKnot *knot, guint state, gpointer data)
567 {
568 SP_SELECT_CONTEXT(knot->desktop->event_context)->_seltrans->handleGrab(
569 knot, state, *(SPSelTransHandle const *) data
570 );
571 }
573 static void sp_sel_trans_handle_ungrab(SPKnot *knot, guint state, gpointer data)
574 {
575 SP_SELECT_CONTEXT(knot->desktop->event_context)->_seltrans->ungrab();
576 }
578 static void sp_sel_trans_handle_new_event(SPKnot *knot, NR::Point *position, guint state, gpointer data)
579 {
580 SP_SELECT_CONTEXT(knot->desktop->event_context)->_seltrans->handleNewEvent(
581 knot, position, state, *(SPSelTransHandle const *) data
582 );
583 }
585 static gboolean sp_sel_trans_handle_request(SPKnot *knot, NR::Point *position, guint state, gboolean *data)
586 {
587 return SP_SELECT_CONTEXT(knot->desktop->event_context)->_seltrans->handleRequest(
588 knot, position, state, *(SPSelTransHandle const *) data
589 );
590 }
592 static void sp_sel_trans_handle_click(SPKnot *knot, guint state, gpointer data)
593 {
594 SP_SELECT_CONTEXT(knot->desktop->event_context)->_seltrans->handleClick(
595 knot, state, *(SPSelTransHandle const *) data
596 );
597 }
599 void Inkscape::SelTrans::handleClick(SPKnot *knot, guint state, SPSelTransHandle const &handle)
600 {
601 switch (handle.anchor) {
602 case GTK_ANCHOR_CENTER:
603 if (state & GDK_SHIFT_MASK) {
604 // Unset the center position for all selected items
605 for (GSList const *l = _desktop->selection->itemList(); l; l = l->next) {
606 SPItem *it = (SPItem*)sp_object_ref(SP_OBJECT(l->data), NULL);
607 it->unsetCenter();
608 SP_OBJECT(it)->updateRepr();
609 }
610 sp_document_maybe_done (SP_DT_DOCUMENT(_desktop), "center::unset");
611 }
612 break;
613 default:
614 break;
615 }
616 }
618 void Inkscape::SelTrans::handleGrab(SPKnot *knot, guint state, SPSelTransHandle const &handle)
619 {
620 switch (handle.anchor) {
621 case GTK_ANCHOR_CENTER:
622 g_object_set(G_OBJECT(_grip),
623 "shape", SP_CTRL_SHAPE_BITMAP,
624 "size", 13.0,
625 NULL);
626 sp_canvas_item_show(_grip);
627 break;
628 default:
629 g_object_set(G_OBJECT(_grip),
630 "shape", SP_CTRL_SHAPE_CROSS,
631 "size", 7.0,
632 NULL);
633 sp_canvas_item_show(_norm);
634 sp_canvas_item_show(_grip);
636 break;
637 }
639 grab(sp_knot_position(knot), handle.x, handle.y, FALSE);
640 }
643 void Inkscape::SelTrans::handleNewEvent(SPKnot *knot, NR::Point *position, guint state, SPSelTransHandle const &handle)
644 {
645 if (!SP_KNOT_IS_GRABBED(knot)) {
646 return;
647 }
649 // in case items have been unhooked from the document, don't
650 // try to continue processing events for them.
651 for (unsigned int i = 0; i < _items.size(); i++) {
652 if (!SP_OBJECT_DOCUMENT(SP_OBJECT(_items[i].first)) ) {
653 return;
654 }
655 }
657 handle.action(this, handle, *position, state);
658 }
661 gboolean Inkscape::SelTrans::handleRequest(SPKnot *knot, NR::Point *position, guint state, SPSelTransHandle const &handle)
662 {
663 if (!SP_KNOT_IS_GRABBED(knot)) {
664 return TRUE;
665 }
667 knot->desktop->set_coordinate_status(*position);
668 knot->desktop->setPosition(*position);
671 if (state & GDK_MOD1_MASK) {
672 *position = _point + ( *position - _point ) / 10;
673 }
675 if (!(state & GDK_SHIFT_MASK) == !(_state == STATE_ROTATE)) {
676 _origin = _opposite;
677 } else {
678 _origin = _center;
679 }
680 if (handle.request(this, handle, *position, state)) {
681 sp_knot_set_position(knot, position, state);
682 SP_CTRL(_grip)->moveto(*position);
683 SP_CTRL(_norm)->moveto(_origin);
684 }
686 return TRUE;
687 }
690 void Inkscape::SelTrans::_selChanged(Inkscape::Selection *selection)
691 {
692 if (!_grabbed) {
693 _updateVolatileState();
694 _center_is_set = false; // center(s) may have changed
695 _updateHandles();
696 }
697 }
699 void Inkscape::SelTrans::_selModified(Inkscape::Selection *selection, guint flags)
700 {
701 if (!_grabbed) {
702 _updateVolatileState();
704 // reset internal flag
705 _changed = false;
707 _center_is_set = false; // center(s) may have changed
709 _updateHandles();
710 }
711 }
713 /*
714 * handlers for handle move-request
715 */
717 /** Returns -1 or 1 according to the sign of x. Returns 1 for 0 and NaN. */
718 static double sign(double const x)
719 {
720 return ( x < 0
721 ? -1
722 : 1 );
723 }
725 gboolean sp_sel_trans_scale_request(Inkscape::SelTrans *seltrans,
726 SPSelTransHandle const &, NR::Point &pt, guint state)
727 {
728 return seltrans->scaleRequest(pt, state);
729 }
731 gboolean sp_sel_trans_stretch_request(Inkscape::SelTrans *seltrans,
732 SPSelTransHandle const &handle, NR::Point &pt, guint state)
733 {
734 return seltrans->stretchRequest(handle, pt, state);
735 }
737 gboolean sp_sel_trans_skew_request(Inkscape::SelTrans *seltrans,
738 SPSelTransHandle const &handle, NR::Point &pt, guint state)
739 {
740 return seltrans->skewRequest(handle, pt, state);
741 }
743 gboolean sp_sel_trans_rotate_request(Inkscape::SelTrans *seltrans,
744 SPSelTransHandle const &, NR::Point &pt, guint state)
745 {
746 return seltrans->rotateRequest(pt, state);
747 }
749 gboolean sp_sel_trans_center_request(Inkscape::SelTrans *seltrans,
750 SPSelTransHandle const &, NR::Point &pt, guint state)
751 {
752 return seltrans->centerRequest(pt, state);
753 }
755 gboolean Inkscape::SelTrans::scaleRequest(NR::Point &pt, guint state)
756 {
757 using NR::X;
758 using NR::Y;
760 NR::Point d = _point - _origin;
761 NR::scale s(0, 0);
763 /* Work out the new scale factors `s' */
764 for ( unsigned int i = 0 ; i < 2 ; i++ ) {
765 if ( fabs(d[i]) > 0.001 ) {
766 s[i] = ( pt[i] - _origin[i] ) / d[i];
767 if ( fabs(s[i]) < 1e-9 ) {
768 s[i] = 1e-9;
769 }
770 }
771 }
773 /* Get a STL list of the selected items.
774 ** FIXME: this should probably be done by Inkscape::Selection.
775 */
776 std::list<SPItem const*> it;
777 for (GSList const *i = _selection->itemList(); i != NULL; i = i->next) {
778 it.push_back(reinterpret_cast<SPItem*>(i->data));
779 }
781 if ((state & GDK_CONTROL_MASK) || _desktop->isToolboxButtonActive ("lock")) {
782 /* Scale is locked to a 1:1 aspect ratio, so that s[X] must be made to equal s[Y] */
784 NR::Dim2 locked_dim;
786 /* Lock aspect ratio, using the smaller of the x and y factors */
787 if (fabs(s[NR::X]) > fabs(s[NR::Y])) {
788 s[NR::X] = fabs(s[NR::Y]) * sign(s[NR::X]);
789 locked_dim = NR::X;
790 } else {
791 s[NR::Y] = fabs(s[NR::X]) * sign(s[NR::Y]);
792 locked_dim = NR::Y;
793 }
795 /* Snap the scale factor */
796 std::pair<double, bool> bb = namedview_vector_snap_list(_desktop->namedview,
797 Snapper::BBOX_POINT, _bbox_points,
798 _origin, s, it);
799 std::pair<double, bool> sn = namedview_vector_snap_list(_desktop->namedview,
800 Snapper::SNAP_POINT, _snap_points,
801 _origin, s, it);
803 double bd = bb.second ? fabs(bb.first - s[locked_dim]) : NR_HUGE;
804 double sd = sn.second ? fabs(sn.first - s[locked_dim]) : NR_HUGE;
805 double r = (bd < sd) ? bb.first : sn.first;
807 for ( unsigned int i = 0 ; i < 2 ; i++ ) {
808 s[i] = r * sign(s[i]);
809 }
811 } else {
812 /* Scale aspect ratio is unlocked */
813 for ( unsigned int i = 0 ; i < 2 ; i++ ) {
814 std::pair<double, bool> bb = namedview_dim_snap_list_scale(_desktop->namedview,
815 Snapper::BBOX_POINT, _bbox_points,
816 _origin, s[i], NR::Dim2(i), it);
817 std::pair<double, bool> sn = namedview_dim_snap_list_scale(_desktop->namedview,
818 Snapper::SNAP_POINT, _snap_points,
819 _origin, s[i], NR::Dim2(i), it);
821 /* Pick the snap that puts us closest to the original scale */
822 NR::Coord bd = bb.second ? fabs(bb.first - s[i]) : NR_HUGE;
823 NR::Coord sd = sn.second ? fabs(sn.first - s[i]) : NR_HUGE;
824 s[i] = (bd < sd) ? bb.first : sn.first;
825 }
826 }
828 /* Update the knot position */
829 pt = ( _point - _origin ) * s + _origin;
831 /* Status text */
832 _message_context.setF(Inkscape::NORMAL_MESSAGE,
833 _("<b>Scale</b>: %0.2f%% x %0.2f%%; with <b>Ctrl</b> to lock ratio"),
834 100 * s[NR::X], 100 * s[NR::Y]);
836 return TRUE;
837 }
839 gboolean Inkscape::SelTrans::stretchRequest(SPSelTransHandle const &handle, NR::Point &pt, guint state)
840 {
841 using NR::X;
842 using NR::Y;
844 NR::Dim2 axis, perp;
846 switch (handle.cursor) {
847 case GDK_TOP_SIDE:
848 case GDK_BOTTOM_SIDE:
849 axis = NR::Y;
850 perp = NR::X;
851 break;
852 case GDK_LEFT_SIDE:
853 case GDK_RIGHT_SIDE:
854 axis = NR::X;
855 perp = NR::Y;
856 break;
857 default:
858 g_assert_not_reached();
859 return TRUE;
860 };
862 if ( fabs( _point[axis] - _origin[axis] ) < 1e-15 ) {
863 return FALSE;
864 }
866 NR::scale s(1, 1);
867 s[axis] = ( ( pt[axis] - _origin[axis] )
868 / ( _point[axis] - _origin[axis] ) );
869 if ( fabs(s[axis]) < 1e-15 ) {
870 s[axis] = 1e-15;
871 }
873 /* Get a STL list of the selected items.
874 ** FIXME: this should probably be done by Inkscape::Selection.
875 */
876 std::list<SPItem const*> it;
877 for (GSList const *i = _selection->itemList(); i != NULL; i = i->next) {
878 it.push_back(reinterpret_cast<SPItem*>(i->data));
879 }
881 if ( state & GDK_CONTROL_MASK ) {
882 s[perp] = fabs(s[axis]);
884 std::pair<double, bool> sn = namedview_vector_snap_list(_desktop->namedview,
885 Snapper::BBOX_POINT,
886 _bbox_points, _origin, s, it);
887 std::pair<double, bool> bb = namedview_vector_snap_list(_desktop->namedview,
888 Snapper::SNAP_POINT,
889 _snap_points, _origin, s, it);
891 double bd = bb.second ? fabs(bb.first - s[axis]) : NR_HUGE;
892 double sd = sn.second ? fabs(sn.first - s[axis]) : NR_HUGE;
893 double ratio = (bd < sd) ? bb.first : sn.first;
895 s[axis] = fabs(ratio) * sign(s[axis]);
896 s[perp] = fabs(s[axis]);
897 } else {
898 std::pair<NR::Coord, bool> bb = namedview_dim_snap_list_scale(_desktop->namedview, Snapper::BBOX_POINT,
899 _bbox_points, _origin,
900 s[axis], axis, it);
901 std::pair<NR::Coord, bool> sn = namedview_dim_snap_list_scale(_desktop->namedview, Snapper::SNAP_POINT,
902 _snap_points, _origin,
903 s[axis], axis, it);
905 /* Pick the snap that puts us closest to the original scale */
906 NR::Coord bd = bb.second ? fabs(bb.first - s[axis]) : NR_HUGE;
907 NR::Coord sd = sn.second ? fabs(sn.first - s[axis]) : NR_HUGE;
908 s[axis] = (bd < sd) ? bb.first : sn.first;
909 }
911 pt = ( _point - _origin ) * NR::scale(s) + _origin;
912 if (isNaN(pt[X] + pt[Y])) {
913 g_warning("point=(%g, %g), norm=(%g, %g), s=(%g, %g)\n",
914 _point[X], _point[Y], _origin[X], _origin[Y], s[X], s[Y]);
915 }
917 // status text
918 _message_context.setF(Inkscape::NORMAL_MESSAGE,
919 _("<b>Scale</b>: %0.2f%% x %0.2f%%; with <b>Ctrl</b> to lock ratio"),
920 100 * s[NR::X], 100 * s[NR::Y]);
922 return TRUE;
923 }
925 gboolean Inkscape::SelTrans::skewRequest(SPSelTransHandle const &handle, NR::Point &pt, guint state)
926 {
927 using NR::X;
928 using NR::Y;
930 if (handle.cursor != GDK_SB_V_DOUBLE_ARROW && handle.cursor != GDK_SB_H_DOUBLE_ARROW) {
931 return FALSE;
932 }
934 NR::Dim2 dim_a;
935 NR::Dim2 dim_b;
936 if (handle.cursor == GDK_SB_V_DOUBLE_ARROW) {
937 dim_a = X;
938 dim_b = Y;
939 } else {
940 dim_a = Y;
941 dim_b = X;
942 }
944 double skew[2];
945 double s[2] = { 1.0, 1.0 };
947 if (fabs(_point[dim_a] - _origin[dim_a]) < NR_EPSILON) {
948 return FALSE;
949 }
951 skew[dim_a] = ( pt[dim_b] - _point[dim_b] ) / ( _point[dim_a] - _origin[dim_a] );
953 s[dim_a] = ( pt[dim_a] - _origin[dim_a] ) / ( _point[dim_a] - _origin[dim_a] );
955 if ( fabs(s[dim_a]) < 1 ) {
956 s[dim_a] = sign(s[dim_a]);
957 } else {
958 s[dim_a] = floor( s[dim_a] + 0.5 );
959 }
961 double radians = atan(skew[dim_a] / s[dim_a]);
963 if (state & GDK_CONTROL_MASK) {
965 int snaps = prefs_get_int_attribute("options.rotationsnapsperpi", "value", 12);
967 if (snaps) {
968 double sections = floor( radians * snaps / M_PI + .5 );
969 if (fabs(sections) >= snaps / 2) sections = sign(sections) * (snaps / 2 - 1);
970 radians = ( M_PI / snaps ) * sections;
971 }
972 skew[dim_a] = tan(radians) * s[dim_a];
973 } else {
974 skew[dim_a] = namedview_dim_snap_list_skew(_desktop->namedview,
975 Snapper::SNAP_POINT, _snap_points,
976 _origin, skew[dim_a], dim_b);
977 }
979 pt[dim_b] = ( _point[dim_a] - _origin[dim_a] ) * skew[dim_a] + _point[dim_b];
980 pt[dim_a] = ( _point[dim_a] - _origin[dim_a] ) * s[dim_a] + _origin[dim_a];
982 /* status text */
983 double degrees = 180 / M_PI * radians;
984 if (degrees > 180) degrees -= 360;
985 if (degrees < -180) degrees += 360;
987 _message_context.setF(Inkscape::NORMAL_MESSAGE,
988 // TRANSLATORS: don't modify the first ";"
989 // (it will NOT be displayed as ";" - only the second one will be)
990 _("<b>Skew</b>: %0.2f°; with <b>Ctrl</b> to snap angle"),
991 degrees);
993 return TRUE;
994 }
996 gboolean Inkscape::SelTrans::rotateRequest(NR::Point &pt, guint state)
997 {
998 int snaps = prefs_get_int_attribute("options.rotationsnapsperpi", "value", 12);
1000 // rotate affine in rotate
1001 NR::Point const d1 = _point - _origin;
1002 NR::Point const d2 = pt - _origin;
1004 NR::Coord const h1 = NR::L2(d1);
1005 if (h1 < 1e-15) return FALSE;
1006 NR::Point q1 = d1 / h1;
1007 NR::Coord const h2 = NR::L2(d2);
1008 if (fabs(h2) < 1e-15) return FALSE;
1009 NR::Point q2 = d2 / h2;
1011 double radians;
1012 if (state & GDK_CONTROL_MASK) {
1013 /* Have to restrict movement. */
1014 double cos_t = NR::dot(q1, q2);
1015 double sin_t = NR::dot(NR::rot90(q1), q2);
1016 radians = atan2(sin_t, cos_t);
1017 if (snaps) {
1018 radians = ( M_PI / snaps ) * floor( radians * snaps / M_PI + .5 );
1019 }
1020 q1 = NR::Point(1, 0);
1021 q2 = NR::Point(cos(radians), sin(radians));
1022 } else {
1023 radians = atan2(NR::dot(NR::rot90(d1), d2),
1024 NR::dot(d1, d2));
1025 }
1027 NR::rotate const r1(q1);
1028 NR::rotate const r2(q2);
1029 pt = _point * NR::translate(-_origin) * ( r2 / r1 ) * NR::translate(_origin);
1031 /* status text */
1032 double degrees = 180 / M_PI * radians;
1033 if (degrees > 180) degrees -= 360;
1034 if (degrees < -180) degrees += 360;
1036 _message_context.setF(Inkscape::NORMAL_MESSAGE,
1037 // TRANSLATORS: don't modify the first ";"
1038 // (it will NOT be displayed as ";" - only the second one will be)
1039 _("<b>Rotate</b>: %0.2f°; with <b>Ctrl</b> to snap angle"), degrees);
1041 return TRUE;
1042 }
1044 gboolean Inkscape::SelTrans::centerRequest(NR::Point &pt, guint state)
1045 {
1046 using NR::X;
1047 using NR::Y;
1049 SnapManager const m(_desktop->namedview);
1050 pt = m.freeSnap(Snapper::SNAP_POINT, pt, NULL).getPoint();
1052 if (state & GDK_CONTROL_MASK) {
1053 if ( fabs(_point[X] - pt[X]) > fabs(_point[Y] - pt[Y]) ) {
1054 pt[Y] = _point[Y];
1055 } else {
1056 pt[X] = _point[X];
1057 }
1058 }
1060 if (!(state & GDK_SHIFT_MASK)) {
1061 // screen pixels to snap center to bbox
1062 #define SNAP_DIST 5
1063 // FIXME: take from prefs
1064 double snap_dist = SNAP_DIST / _desktop->current_zoom();
1066 for (int i = 0; i < 2; i++) {
1068 if (fabs(pt[i] - _box.min()[i]) < snap_dist) {
1069 pt[i] = _box.min()[i];
1070 }
1071 if (fabs(pt[i] - _box.midpoint()[i]) < snap_dist) {
1072 pt[i] = _box.midpoint()[i];
1073 }
1074 if (fabs(pt[i] - _box.max()[i]) < snap_dist) {
1075 pt[i] = _box.max()[i];
1076 }
1077 }
1078 }
1080 // status text
1081 GString *xs = SP_PX_TO_METRIC_STRING(pt[X], _desktop->namedview->getDefaultMetric());
1082 GString *ys = SP_PX_TO_METRIC_STRING(pt[Y], _desktop->namedview->getDefaultMetric());
1083 _message_context.setF(Inkscape::NORMAL_MESSAGE, _("Move <b>center</b> to %s, %s"), xs->str, ys->str);
1084 g_string_free(xs, FALSE);
1085 g_string_free(ys, FALSE);
1087 return TRUE;
1088 }
1090 /*
1091 * handlers for handle movement
1092 *
1093 */
1095 void sp_sel_trans_stretch(Inkscape::SelTrans *seltrans, SPSelTransHandle const &handle, NR::Point &pt, guint state)
1096 {
1097 seltrans->stretch(handle, pt, state);
1098 }
1100 void sp_sel_trans_scale(Inkscape::SelTrans *seltrans, SPSelTransHandle const &, NR::Point &pt, guint state)
1101 {
1102 seltrans->scale(pt, state);
1103 }
1105 void sp_sel_trans_skew(Inkscape::SelTrans *seltrans, SPSelTransHandle const &handle, NR::Point &pt, guint state)
1106 {
1107 seltrans->skew(handle, pt, state);
1108 }
1110 void sp_sel_trans_rotate(Inkscape::SelTrans *seltrans, SPSelTransHandle const &, NR::Point &pt, guint state)
1111 {
1112 seltrans->rotate(pt, state);
1113 }
1115 void Inkscape::SelTrans::stretch(SPSelTransHandle const &handle, NR::Point &pt, guint state)
1116 {
1117 using NR::X;
1118 using NR::Y;
1120 NR::Dim2 dim;
1121 switch (handle.cursor) {
1122 case GDK_LEFT_SIDE:
1123 case GDK_RIGHT_SIDE:
1124 dim = X;
1125 break;
1126 case GDK_TOP_SIDE:
1127 case GDK_BOTTOM_SIDE:
1128 dim = Y;
1129 break;
1130 default:
1131 g_assert_not_reached();
1132 abort();
1133 break;
1134 }
1136 NR::Point const scale_origin(_origin);
1137 double const offset = _point[dim] - scale_origin[dim];
1138 if (!( fabs(offset) >= 1e-15 )) {
1139 return;
1140 }
1141 NR::scale s(1, 1);
1142 s[dim] = ( pt[dim] - scale_origin[dim] ) / offset;
1143 if (isNaN(s[dim])) {
1144 g_warning("s[dim]=%g, pt[dim]=%g, scale_origin[dim]=%g, point[dim]=%g\n",
1145 s[dim], pt[dim], scale_origin[dim], _point[dim]);
1146 }
1147 if (!( fabs(s[dim]) >= 1e-15 )) {
1148 s[dim] = 1e-15;
1149 }
1150 if (state & GDK_CONTROL_MASK) {
1151 /* Preserve aspect ratio, but never flip in the dimension not being edited. */
1152 s[!dim] = fabs(s[dim]);
1153 }
1155 NR::Point new_bbox_min = _box.min() * (NR::translate(-scale_origin) * NR::Matrix(s) * NR::translate(scale_origin));
1156 NR::Point new_bbox_max = _box.max() * (NR::translate(-scale_origin) * NR::Matrix(s) * NR::translate(scale_origin));
1158 int transform_stroke = prefs_get_int_attribute ("options.transform", "stroke", 1);
1159 NR::Matrix scaler = get_scale_transform_with_stroke (_box, _strokewidth, transform_stroke,
1160 new_bbox_min[NR::X], new_bbox_min[NR::Y], new_bbox_max[NR::X], new_bbox_max[NR::Y]);
1162 transform(scaler, NR::Point(0, 0)); // we have already accounted for origin, so pass 0,0
1163 }
1165 void Inkscape::SelTrans::scale(NR::Point &pt, guint state)
1166 {
1167 NR::Point const offset = _point - _origin;
1169 NR::scale s (1, 1);
1170 for (int i = NR::X; i <= NR::Y; i++) {
1171 if (fabs(offset[i]) > 1e-9)
1172 s[i] = (pt[i] - _origin[i]) / offset[i];
1173 if (fabs(s[i]) < 1e-9)
1174 s[i] = 1e-9;
1175 }
1176 NR::Point new_bbox_min = _box.min() * (NR::translate(-_origin) * NR::Matrix(s) * NR::translate(_origin));
1177 NR::Point new_bbox_max = _box.max() * (NR::translate(-_origin) * NR::Matrix(s) * NR::translate(_origin));
1179 int transform_stroke = prefs_get_int_attribute ("options.transform", "stroke", 1);
1180 NR::Matrix scaler = get_scale_transform_with_stroke (_box, _strokewidth, transform_stroke,
1181 new_bbox_min[NR::X], new_bbox_min[NR::Y], new_bbox_max[NR::X], new_bbox_max[NR::Y]);
1183 transform(scaler, NR::Point(0, 0)); // we have already accounted for origin, so pass 0,0
1184 }
1186 void Inkscape::SelTrans::skew(SPSelTransHandle const &handle, NR::Point &pt, guint state)
1187 {
1188 NR::Point const offset = _point - _origin;
1190 unsigned dim;
1191 switch (handle.cursor) {
1192 case GDK_SB_H_DOUBLE_ARROW:
1193 dim = NR::Y;
1194 break;
1195 case GDK_SB_V_DOUBLE_ARROW:
1196 dim = NR::X;
1197 break;
1198 default:
1199 g_assert_not_reached();
1200 abort();
1201 break;
1202 }
1203 if (fabs(offset[dim]) < 1e-15) {
1204 return;
1205 }
1206 NR::Matrix skew = NR::identity();
1207 skew[2*dim + dim] = (pt[dim] - _origin[dim]) / offset[dim];
1208 skew[2*dim + (1-dim)] = (pt[1-dim] - _point[1-dim]) / offset[dim];
1209 skew[2*(1-dim) + (dim)] = 0;
1210 skew[2*(1-dim) + (1-dim)] = 1;
1212 for (int i = 0; i < 2; i++) {
1213 if (fabs(skew[3*i]) < 1e-15) {
1214 skew[3*i] = 1e-15;
1215 }
1216 }
1217 transform(skew, _origin);
1218 }
1220 void Inkscape::SelTrans::rotate(NR::Point &pt, guint state)
1221 {
1222 NR::Point const offset = _point - _origin;
1224 NR::Coord const h1 = NR::L2(offset);
1225 if (h1 < 1e-15) {
1226 return;
1227 }
1228 NR::Point const q1 = offset / h1;
1229 NR::Coord const h2 = NR::L2( pt - _origin );
1230 if (h2 < 1e-15) {
1231 return;
1232 }
1233 NR::Point const q2 = (pt - _origin) / h2;
1234 NR::rotate const r1(q1);
1235 NR::rotate const r2(q2);
1237 NR::Matrix rotate( r2 / r1 );
1238 transform(rotate, _origin);
1239 }
1241 void sp_sel_trans_center(Inkscape::SelTrans *seltrans, SPSelTransHandle const &, NR::Point &pt, guint state)
1242 {
1243 seltrans->setCenter(pt);
1244 }
1247 void Inkscape::SelTrans::moveTo(NR::Point const &xy, guint state)
1248 {
1249 SnapManager const m(_desktop->namedview);
1251 /* The amount that we've moved by during this drag */
1252 NR::Point dxy = xy - _point;
1254 /* Get a STL list of the selected items.
1255 ** FIXME: this should probably be done by Inkscape::Selection.
1256 */
1257 std::list<SPItem const*> it;
1258 for (GSList const *i = _selection->itemList(); i != NULL; i = i->next) {
1259 it.push_back(reinterpret_cast<SPItem*>(i->data));
1260 }
1262 bool const alt = (state & GDK_MOD1_MASK);
1263 bool const control = (state & GDK_CONTROL_MASK);
1264 bool const shift = (state & GDK_SHIFT_MASK);
1266 if (alt) {
1268 /* Alt pressed means keep offset: snap the moved distance to the grid.
1269 ** FIXME: this will snap to more than just the grid, nowadays.
1270 */
1272 dxy = m.freeSnap(Snapper::SNAP_POINT, dxy, NULL).getPoint();
1274 } else if (!shift) {
1276 /* We're snapping to things, possibly with a constraint to horizontal or
1277 ** vertical movement. Obtain a list of possible translations and then
1278 ** pick the smallest.
1279 */
1281 /* This will be our list of possible translations */
1282 std::list<std::pair<NR::Point, bool> > s;
1284 if (control) {
1286 /* Snap to things, and also constrain to horizontal or vertical movement */
1288 for (unsigned int dim = 0; dim < 2; dim++) {
1289 s.push_back(m.constrainedSnapTranslation(Inkscape::Snapper::BBOX_POINT,
1290 _bbox_points,
1291 component_vectors[dim], it, dxy));
1292 s.push_back(m.constrainedSnapTranslation(Inkscape::Snapper::SNAP_POINT,
1293 _snap_points,
1294 component_vectors[dim], it, dxy));
1295 }
1297 } else {
1299 /* Snap to things with no constraint */
1301 s.push_back(m.freeSnapTranslation(Inkscape::Snapper::BBOX_POINT,
1302 _bbox_points, it, dxy));
1303 s.push_back(m.freeSnapTranslation(Inkscape::Snapper::SNAP_POINT,
1304 _snap_points, it, dxy));
1305 }
1307 /* Pick one */
1308 NR::Coord best = NR_HUGE;
1309 for (std::list<std::pair<NR::Point, bool> >::const_iterator i = s.begin(); i != s.end(); i++) {
1310 if (i->second) {
1311 NR::Coord const m = NR::L2(i->first);
1312 if (m < best) {
1313 best = m;
1314 dxy = i->first;
1315 }
1316 }
1317 }
1318 }
1320 if (control) {
1321 /* Ensure that the horizontal and vertical constraint has been applied */
1322 if (fabs(dxy[NR::X]) > fabs(dxy[NR::Y])) {
1323 dxy[NR::Y] = 0;
1324 } else {
1325 dxy[NR::X] = 0;
1326 }
1327 }
1329 NR::Matrix const move((NR::translate(dxy)));
1330 NR::Point const norm(0, 0);
1331 transform(move, norm);
1333 // status text
1334 GString *xs = SP_PX_TO_METRIC_STRING(dxy[NR::X], _desktop->namedview->getDefaultMetric());
1335 GString *ys = SP_PX_TO_METRIC_STRING(dxy[NR::Y], _desktop->namedview->getDefaultMetric());
1336 _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);
1337 g_string_free(xs, TRUE);
1338 g_string_free(ys, TRUE);
1339 }
1342 /*
1343 Local Variables:
1344 mode:c++
1345 c-file-style:"stroustrup"
1346 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
1347 indent-tabs-mode:nil
1348 fill-column:99
1349 End:
1350 */
1351 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4 :