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 _box(NR::Point(0,0), NR::Point(0,0)),
92 _chandle(NULL),
93 _stamp_cache(NULL),
94 _message_context(desktop->messageStack())
95 {
96 g_return_if_fail(desktop != NULL);
98 for (int i = 0; i < 8; i++) {
99 _shandle[i] = NULL;
100 _rhandle[i] = NULL;
101 }
103 _updateVolatileState();
105 _center_is_set = false; // reread _center from items, or set to bbox midpoint
107 _updateHandles();
109 _selection = sp_desktop_selection(desktop);
111 _norm = sp_canvas_item_new(sp_desktop_controls(desktop),
112 SP_TYPE_CTRL,
113 "anchor", GTK_ANCHOR_CENTER,
114 "mode", SP_CTRL_MODE_COLOR,
115 "shape", SP_CTRL_SHAPE_BITMAP,
116 "size", 13.0,
117 "filled", TRUE,
118 "fill_color", 0x00000000,
119 "stroked", TRUE,
120 "stroke_color", 0x000000a0,
121 "pixbuf", handles[12],
122 NULL);
124 _grip = sp_canvas_item_new(sp_desktop_controls(desktop),
125 SP_TYPE_CTRL,
126 "anchor", GTK_ANCHOR_CENTER,
127 "mode", SP_CTRL_MODE_XOR,
128 "shape", SP_CTRL_SHAPE_CROSS,
129 "size", 7.0,
130 "filled", TRUE,
131 "fill_color", 0xffffff7f,
132 "stroked", TRUE,
133 "stroke_color", 0xffffffff,
134 "pixbuf", handles[12],
135 NULL);
137 sp_canvas_item_hide(_grip);
138 sp_canvas_item_hide(_norm);
140 for (int i = 0; i < 4; i++) {
141 _l[i] = sp_canvas_item_new(sp_desktop_controls(desktop), SP_TYPE_CTRLLINE, NULL);
142 sp_canvas_item_hide(_l[i]);
143 }
145 _sel_changed_connection = _selection->connectChanged(
146 sigc::mem_fun(*this, &Inkscape::SelTrans::_selChanged)
147 );
149 _sel_modified_connection = _selection->connectModified(
150 sigc::mem_fun(*this, &Inkscape::SelTrans::_selModified)
151 );
152 }
154 Inkscape::SelTrans::~SelTrans()
155 {
156 _sel_changed_connection.disconnect();
157 _sel_modified_connection.disconnect();
159 for (unsigned int i = 0; i < 8; i++) {
160 if (_shandle[i]) {
161 g_object_unref(G_OBJECT(_shandle[i]));
162 _shandle[i] = NULL;
163 }
164 if (_rhandle[i]) {
165 g_object_unref(G_OBJECT(_rhandle[i]));
166 _rhandle[i] = NULL;
167 }
168 }
169 if (_chandle) {
170 g_object_unref(G_OBJECT(_chandle));
171 _chandle = NULL;
172 }
174 if (_norm) {
175 gtk_object_destroy(GTK_OBJECT(_norm));
176 _norm = NULL;
177 }
178 if (_grip) {
179 gtk_object_destroy(GTK_OBJECT(_grip));
180 _grip = NULL;
181 }
182 for (int i = 0; i < 4; i++) {
183 if (_l[i]) {
184 gtk_object_destroy(GTK_OBJECT(_l[i]));
185 _l[i] = NULL;
186 }
187 }
189 for (unsigned i = 0; i < _items.size(); i++) {
190 sp_object_unref(SP_OBJECT(_items[i].first), NULL);
191 }
193 _items.clear();
194 _items_centers.clear();
195 }
197 void Inkscape::SelTrans::resetState()
198 {
199 _state = STATE_SCALE;
200 }
202 void Inkscape::SelTrans::increaseState()
203 {
204 if (_state == STATE_SCALE) {
205 _state = STATE_ROTATE;
206 } else {
207 _state = STATE_SCALE;
208 }
210 _center_is_set = true; // no need to reread center
212 _updateHandles();
213 }
215 void Inkscape::SelTrans::setCenter(NR::Point const &p)
216 {
217 _center = p;
218 _center_is_set = true;
220 // Write the new center position into all selected items
221 for (GSList const *l = _desktop->selection->itemList(); l; l = l->next) {
222 SPItem *it = (SPItem*)sp_object_ref(SP_OBJECT(l->data), NULL);
223 it->setCenter(p);
224 SP_OBJECT(it)->updateRepr();
225 }
226 sp_document_maybe_done (sp_desktop_document(_desktop), "center::move", SP_VERB_CONTEXT_SELECT,
227 /* TODO: annotate */ "seltrans.cpp:227");
229 _updateHandles();
230 }
232 void Inkscape::SelTrans::grab(NR::Point const &p, gdouble x, gdouble y, bool show_handles)
233 {
234 Inkscape::Selection *selection = sp_desktop_selection(_desktop);
236 g_return_if_fail(!_grabbed);
238 _grabbed = true;
239 _show_handles = show_handles;
240 _updateVolatileState();
242 _changed = false;
244 if (_empty) {
245 return;
246 }
248 for (GSList const *l = selection->itemList(); l; l = l->next) {
249 SPItem *it = (SPItem*)sp_object_ref(SP_OBJECT(l->data), NULL);
250 _items.push_back(std::pair<SPItem *, NR::Matrix>(it, sp_item_i2d_affine(it)));
251 _items_centers.push_back(std::pair<SPItem *, NR::Point>(it, it->getCenter())); // for content-dragging, we need to remember original centers
252 }
254 _current.set_identity();
256 _point = p;
258 _snap_points = selection->getSnapPointsConvexHull();
259 _bbox_points = selection->getBBoxPointsOuter();
261 gchar const *scale_origin = prefs_get_string_attribute("tools.select", "scale_origin");
262 bool const origin_on_bbox = (scale_origin == NULL || !strcmp(scale_origin, "bbox"));
263 NR::Rect op_box = _box;
264 if (origin_on_bbox == false && _snap_points.empty() == false) {
265 std::vector<NR::Point>::iterator i = _snap_points.begin();
266 op_box = NR::Rect(*i, *i);
267 i++;
268 while (i != _snap_points.end()) {
269 op_box.expandTo(*i);
270 i++;
271 }
272 }
274 _opposite = ( op_box.min() + ( op_box.dimensions() * NR::scale(1-x, 1-y) ) );
276 if ((x != -1) && (y != -1)) {
277 sp_canvas_item_show(_norm);
278 sp_canvas_item_show(_grip);
279 }
281 if (_show == SHOW_OUTLINE) {
282 for (int i = 0; i < 4; i++)
283 sp_canvas_item_show(_l[i]);
284 }
287 _updateHandles();
288 g_return_if_fail(_stamp_cache == NULL);
289 }
291 void Inkscape::SelTrans::transform(NR::Matrix const &rel_affine, NR::Point const &norm)
292 {
293 g_return_if_fail(_grabbed);
294 g_return_if_fail(!_empty);
296 NR::Matrix const affine( NR::translate(-norm) * rel_affine * NR::translate(norm) );
298 if (_show == SHOW_CONTENT) {
299 // update the content
300 for (unsigned i = 0; i < _items.size(); i++) {
301 SPItem &item = *_items[i].first;
302 NR::Matrix const &prev_transform = _items[i].second;
303 sp_item_set_i2d_affine(&item, prev_transform * affine);
304 }
305 } else {
306 NR::Point p[4];
307 /* update the outline */
308 for (unsigned i = 0 ; i < 4 ; i++) {
309 p[i] = _box.corner(i) * affine;
310 }
311 for (unsigned i = 0 ; i < 4 ; i++) {
312 sp_ctrlline_set_coords(SP_CTRLLINE(_l[i]), p[i], p[(i+1)%4]);
313 }
314 }
316 _current = affine;
317 _changed = true;
318 _updateHandles();
319 }
321 void Inkscape::SelTrans::ungrab()
322 {
323 g_return_if_fail(_grabbed);
325 Inkscape::Selection *selection = sp_desktop_selection(_desktop);
326 bool updh = true;
327 if (!_empty && _changed) {
328 sp_selection_apply_affine(selection, _current, (_show == SHOW_OUTLINE)? true : false);
329 _center *= _current;
330 _center_is_set = true;
332 // If dragging showed content live, sp_selection_apply_affine cannot change the centers
333 // appropriately - it does not know the original positions of the centers (all objects already have
334 // the new bboxes). So we need to reset the centers from our saved array.
335 if (_show != SHOW_OUTLINE && !_current.is_translation()) {
336 for (unsigned i = 0; i < _items_centers.size(); i++) {
337 SPItem *currentItem = _items_centers[i].first;
338 if (currentItem->isCenterSet()) { // only if it's already set
339 currentItem->setCenter (_items_centers[i].second * _current);
340 SP_OBJECT(currentItem)->updateRepr();
341 }
342 }
343 }
345 sp_document_done(sp_desktop_document(_desktop), SP_VERB_CONTEXT_SELECT,
346 /* TODO: annotate */ "seltrans.cpp:346");
347 updh = false;
348 }
350 for (unsigned i = 0; i < _items.size(); i++) {
351 sp_object_unref(SP_OBJECT(_items[i].first), NULL);
352 }
353 _items.clear();
354 _items_centers.clear();
356 _grabbed = false;
357 _show_handles = true;
359 sp_canvas_item_hide(_norm);
360 sp_canvas_item_hide(_grip);
362 if (_show == SHOW_OUTLINE) {
363 for (int i = 0; i < 4; i++)
364 sp_canvas_item_hide(_l[i]);
365 }
367 _updateVolatileState();
368 if (updh) {
369 _updateHandles();
370 }
371 if (_stamp_cache) {
372 g_slist_free(_stamp_cache);
373 _stamp_cache = NULL;
374 }
376 _message_context.clear();
377 }
379 /* fixme: This is really bad, as we compare positions for each stamp (Lauris) */
380 /* fixme: IMHO the best way to keep sort cache would be to implement timestamping at last */
382 void Inkscape::SelTrans::stamp()
383 {
384 Inkscape::Selection *selection = sp_desktop_selection(_desktop);
386 bool fixup = !_grabbed;
387 if ( fixup && _stamp_cache ) {
388 // TODO - give a proper fix. Simple temproary work-around for the grab() issue
389 g_slist_free(_stamp_cache);
390 _stamp_cache = NULL;
391 }
393 /* stamping mode */
394 if (!_empty) {
395 GSList *l;
396 if (_stamp_cache) {
397 l = _stamp_cache;
398 } else {
399 /* Build cache */
400 l = g_slist_copy((GSList *) selection->itemList());
401 l = g_slist_sort(l, (GCompareFunc) sp_object_compare_position);
402 _stamp_cache = l;
403 }
405 while (l) {
406 SPItem *original_item = SP_ITEM(l->data);
407 Inkscape::XML::Node *original_repr = SP_OBJECT_REPR(original_item);
409 // remember the position of the item
410 gint pos = original_repr->position();
411 // remember parent
412 Inkscape::XML::Node *parent = sp_repr_parent(original_repr);
414 Inkscape::XML::Node *copy_repr = original_repr->duplicate();
416 // add the new repr to the parent
417 parent->appendChild(copy_repr);
418 // move to the saved position
419 copy_repr->setPosition(pos > 0 ? pos : 0);
421 SPItem *copy_item = (SPItem *) sp_desktop_document(_desktop)->getObjectByRepr(copy_repr);
423 NR::Matrix const *new_affine;
424 if (_show == SHOW_OUTLINE) {
425 NR::Matrix const i2d(sp_item_i2d_affine(original_item));
426 NR::Matrix const i2dnew( i2d * _current );
427 sp_item_set_i2d_affine(copy_item, i2dnew);
428 new_affine = ©_item->transform;
429 } else {
430 new_affine = &original_item->transform;
431 }
433 sp_item_write_transform(copy_item, copy_repr, *new_affine);
435 if (copy_item->isCenterSet()) {
436 copy_item->setCenter(_center * _current);
437 }
439 Inkscape::GC::release(copy_repr);
440 l = l->next;
441 }
442 sp_document_done(sp_desktop_document(_desktop), SP_VERB_CONTEXT_SELECT,
443 /* TODO: annotate */ "seltrans.cpp:443");
444 }
446 if ( fixup && _stamp_cache ) {
447 // TODO - give a proper fix. Simple temproary work-around for the grab() issue
448 g_slist_free(_stamp_cache);
449 _stamp_cache = NULL;
450 }
451 }
453 void Inkscape::SelTrans::_updateHandles()
454 {
455 if ( !_show_handles || _empty )
456 {
457 sp_remove_handles(_shandle, 8);
458 sp_remove_handles(_rhandle, 8);
459 sp_remove_handles(&_chandle, 1);
460 return;
461 }
463 // center handle
464 if ( _chandle == NULL ) {
465 _chandle = sp_knot_new(_desktop, _("<b>Center</b> of rotation and skewing: drag to reposition; scaling with Shift also uses this center"));
467 _chandle->setShape (SP_CTRL_SHAPE_BITMAP);
468 _chandle->setSize (13);
469 _chandle->setAnchor (handle_center.anchor);
470 _chandle->setMode (SP_CTRL_MODE_XOR);
471 _chandle->setFill(0x00000000, 0x00000000, 0x00000000);
472 _chandle->setStroke(0x000000ff, 0xff0000b0, 0xff0000b0);
473 _chandle->setPixbuf(handles[handle_center.control]);
474 sp_knot_update_ctrl(_chandle);
476 g_signal_connect(G_OBJECT(_chandle), "request",
477 G_CALLBACK(sp_sel_trans_handle_request), (gpointer) &handle_center);
478 g_signal_connect(G_OBJECT(_chandle), "moved",
479 G_CALLBACK(sp_sel_trans_handle_new_event), (gpointer) &handle_center);
480 g_signal_connect(G_OBJECT(_chandle), "grabbed",
481 G_CALLBACK(sp_sel_trans_handle_grab), (gpointer) &handle_center);
482 g_signal_connect(G_OBJECT(_chandle), "ungrabbed",
483 G_CALLBACK(sp_sel_trans_handle_ungrab), (gpointer) &handle_center);
484 g_signal_connect(G_OBJECT(_chandle), "clicked",
485 G_CALLBACK(sp_sel_trans_handle_click), (gpointer) &handle_center);
486 }
488 sp_remove_handles(&_chandle, 1);
489 if ( _state == STATE_SCALE ) {
490 sp_remove_handles(_rhandle, 8);
491 _showHandles(_shandle, handles_scale, 8,
492 _("<b>Squeeze or stretch</b> selection; with <b>Ctrl</b> to scale uniformly; with <b>Shift</b> to scale around rotation center"),
493 _("<b>Scale</b> selection; with <b>Ctrl</b> to scale uniformly; with <b>Shift</b> to scale around rotation center"));
494 } else {
495 sp_remove_handles(_shandle, 8);
496 _showHandles(_rhandle, handles_rotate, 8,
497 _("<b>Skew</b> selection; with <b>Ctrl</b> to snap angle; with <b>Shift</b> to skew around the opposite side"),
498 _("<b>Rotate</b> selection; with <b>Ctrl</b> to snap angle; with <b>Shift</b> to rotate around the opposite corner"));
499 }
501 if (!_center_is_set) {
502 _center = _desktop->selection->center();
503 _center_is_set = true;
504 }
506 if ( _state == STATE_SCALE ) {
507 sp_knot_hide(_chandle);
508 } else {
509 sp_knot_show(_chandle);
510 sp_knot_moveto(_chandle, &_center);
511 }
512 }
514 void Inkscape::SelTrans::_updateVolatileState()
515 {
516 Inkscape::Selection *selection = sp_desktop_selection(_desktop);
517 _empty = selection->isEmpty();
519 if (_empty) {
520 return;
521 }
523 _box = selection->bounds();
524 if (_box.isEmpty()) {
525 _empty = true;
526 return;
527 }
529 _strokewidth = stroke_average_width (selection->itemList());
531 _current.set_identity();
532 }
534 static void sp_remove_handles(SPKnot *knot[], gint num)
535 {
536 for (int i = 0; i < num; i++) {
537 if (knot[i] != NULL) {
538 sp_knot_hide(knot[i]);
539 }
540 }
541 }
543 void Inkscape::SelTrans::_showHandles(SPKnot *knot[], SPSelTransHandle const handle[], gint num,
544 gchar const *even_tip, gchar const *odd_tip)
545 {
546 g_return_if_fail( !_empty );
548 for (int i = 0; i < num; i++) {
549 if (knot[i] == NULL) {
550 knot[i] = sp_knot_new(_desktop, i % 2 ? even_tip : odd_tip);
552 knot[i]->setShape (SP_CTRL_SHAPE_BITMAP);
553 knot[i]->setSize (13);
554 knot[i]->setAnchor (handle[i].anchor);
555 knot[i]->setMode (SP_CTRL_MODE_XOR);
556 knot[i]->setFill(0x000000ff, 0x00ff6600, 0x00ff6600); // inversion, green, green
557 knot[i]->setStroke(0x000000ff, 0x000000ff, 0x000000ff); // inversion
558 knot[i]->setPixbuf(handles[handle[i].control]);
559 sp_knot_update_ctrl(knot[i]);
561 g_signal_connect(G_OBJECT(knot[i]), "request",
562 G_CALLBACK(sp_sel_trans_handle_request), (gpointer) &handle[i]);
563 g_signal_connect(G_OBJECT(knot[i]), "moved",
564 G_CALLBACK(sp_sel_trans_handle_new_event), (gpointer) &handle[i]);
565 g_signal_connect(G_OBJECT(knot[i]), "grabbed",
566 G_CALLBACK(sp_sel_trans_handle_grab), (gpointer) &handle[i]);
567 g_signal_connect(G_OBJECT(knot[i]), "ungrabbed",
568 G_CALLBACK(sp_sel_trans_handle_ungrab), (gpointer) &handle[i]);
569 g_signal_connect(G_OBJECT(knot[i]), "event", G_CALLBACK(sp_seltrans_handle_event), (gpointer) &handle[i]);
570 }
571 sp_knot_show(knot[i]);
573 NR::Point const handle_pt(handle[i].x, handle[i].y);
574 NR::Point p( _box.min()
575 + ( _box.dimensions()
576 * NR::scale(handle_pt) ) );
578 sp_knot_moveto(knot[i], &p);
579 }
580 }
582 static void sp_sel_trans_handle_grab(SPKnot *knot, guint state, gpointer data)
583 {
584 SP_SELECT_CONTEXT(knot->desktop->event_context)->_seltrans->handleGrab(
585 knot, state, *(SPSelTransHandle const *) data
586 );
587 }
589 static void sp_sel_trans_handle_ungrab(SPKnot *knot, guint state, gpointer data)
590 {
591 SP_SELECT_CONTEXT(knot->desktop->event_context)->_seltrans->ungrab();
592 }
594 static void sp_sel_trans_handle_new_event(SPKnot *knot, NR::Point *position, guint state, gpointer data)
595 {
596 SP_SELECT_CONTEXT(knot->desktop->event_context)->_seltrans->handleNewEvent(
597 knot, position, state, *(SPSelTransHandle const *) data
598 );
599 }
601 static gboolean sp_sel_trans_handle_request(SPKnot *knot, NR::Point *position, guint state, gboolean *data)
602 {
603 return SP_SELECT_CONTEXT(knot->desktop->event_context)->_seltrans->handleRequest(
604 knot, position, state, *(SPSelTransHandle const *) data
605 );
606 }
608 static void sp_sel_trans_handle_click(SPKnot *knot, guint state, gpointer data)
609 {
610 SP_SELECT_CONTEXT(knot->desktop->event_context)->_seltrans->handleClick(
611 knot, state, *(SPSelTransHandle const *) data
612 );
613 }
615 void Inkscape::SelTrans::handleClick(SPKnot *knot, guint state, SPSelTransHandle const &handle)
616 {
617 switch (handle.anchor) {
618 case GTK_ANCHOR_CENTER:
619 if (state & GDK_SHIFT_MASK) {
620 // Unset the center position for all selected items
621 for (GSList const *l = _desktop->selection->itemList(); l; l = l->next) {
622 SPItem *it = (SPItem*)sp_object_ref(SP_OBJECT(l->data), NULL);
623 it->unsetCenter();
624 SP_OBJECT(it)->updateRepr();
625 _center_is_set = false; // center has changed
626 _updateHandles();
627 }
628 sp_document_maybe_done (sp_desktop_document(_desktop), "center::unset", SP_VERB_CONTEXT_SELECT,
629 /* TODO: annotate */ "seltrans.cpp:629");
630 }
631 break;
632 default:
633 break;
634 }
635 }
637 void Inkscape::SelTrans::handleGrab(SPKnot *knot, guint state, SPSelTransHandle const &handle)
638 {
639 switch (handle.anchor) {
640 case GTK_ANCHOR_CENTER:
641 g_object_set(G_OBJECT(_grip),
642 "shape", SP_CTRL_SHAPE_BITMAP,
643 "size", 13.0,
644 NULL);
645 sp_canvas_item_show(_grip);
646 break;
647 default:
648 g_object_set(G_OBJECT(_grip),
649 "shape", SP_CTRL_SHAPE_CROSS,
650 "size", 7.0,
651 NULL);
652 sp_canvas_item_show(_norm);
653 sp_canvas_item_show(_grip);
655 break;
656 }
658 grab(sp_knot_position(knot), handle.x, handle.y, FALSE);
659 }
662 void Inkscape::SelTrans::handleNewEvent(SPKnot *knot, NR::Point *position, guint state, SPSelTransHandle const &handle)
663 {
664 if (!SP_KNOT_IS_GRABBED(knot)) {
665 return;
666 }
668 // in case items have been unhooked from the document, don't
669 // try to continue processing events for them.
670 for (unsigned int i = 0; i < _items.size(); i++) {
671 if (!SP_OBJECT_DOCUMENT(SP_OBJECT(_items[i].first)) ) {
672 return;
673 }
674 }
676 handle.action(this, handle, *position, state);
677 }
680 gboolean Inkscape::SelTrans::handleRequest(SPKnot *knot, NR::Point *position, guint state, SPSelTransHandle const &handle)
681 {
682 if (!SP_KNOT_IS_GRABBED(knot)) {
683 return TRUE;
684 }
686 knot->desktop->set_coordinate_status(*position);
687 knot->desktop->setPosition(*position);
690 if (state & GDK_MOD1_MASK) {
691 *position = _point + ( *position - _point ) / 10;
692 }
694 if (!(state & GDK_SHIFT_MASK) == !(_state == STATE_ROTATE)) {
695 _origin = _opposite;
696 } else {
697 _origin = _center;
698 }
699 if (handle.request(this, handle, *position, state)) {
700 sp_knot_set_position(knot, position, state);
701 SP_CTRL(_grip)->moveto(*position);
702 SP_CTRL(_norm)->moveto(_origin);
703 }
705 return TRUE;
706 }
709 void Inkscape::SelTrans::_selChanged(Inkscape::Selection *selection)
710 {
711 if (!_grabbed) {
712 _updateVolatileState();
713 _center_is_set = false; // center(s) may have changed
714 _updateHandles();
715 }
716 }
718 void Inkscape::SelTrans::_selModified(Inkscape::Selection *selection, guint flags)
719 {
720 if (!_grabbed) {
721 _updateVolatileState();
723 // reset internal flag
724 _changed = false;
726 _center_is_set = false; // center(s) may have changed
728 _updateHandles();
729 }
730 }
732 /*
733 * handlers for handle move-request
734 */
736 /** Returns -1 or 1 according to the sign of x. Returns 1 for 0 and NaN. */
737 static double sign(double const x)
738 {
739 return ( x < 0
740 ? -1
741 : 1 );
742 }
744 gboolean sp_sel_trans_scale_request(Inkscape::SelTrans *seltrans,
745 SPSelTransHandle const &, NR::Point &pt, guint state)
746 {
747 return seltrans->scaleRequest(pt, state);
748 }
750 gboolean sp_sel_trans_stretch_request(Inkscape::SelTrans *seltrans,
751 SPSelTransHandle const &handle, NR::Point &pt, guint state)
752 {
753 return seltrans->stretchRequest(handle, pt, state);
754 }
756 gboolean sp_sel_trans_skew_request(Inkscape::SelTrans *seltrans,
757 SPSelTransHandle const &handle, NR::Point &pt, guint state)
758 {
759 return seltrans->skewRequest(handle, pt, state);
760 }
762 gboolean sp_sel_trans_rotate_request(Inkscape::SelTrans *seltrans,
763 SPSelTransHandle const &, NR::Point &pt, guint state)
764 {
765 return seltrans->rotateRequest(pt, state);
766 }
768 gboolean sp_sel_trans_center_request(Inkscape::SelTrans *seltrans,
769 SPSelTransHandle const &, NR::Point &pt, guint state)
770 {
771 return seltrans->centerRequest(pt, state);
772 }
774 gboolean Inkscape::SelTrans::scaleRequest(NR::Point &pt, guint state)
775 {
776 using NR::X;
777 using NR::Y;
779 NR::Point d = _point - _origin;
780 NR::scale s(0, 0);
782 /* Work out the new scale factors `s' */
783 for ( unsigned int i = 0 ; i < 2 ; i++ ) {
784 if ( fabs(d[i]) > 0.001 ) {
785 s[i] = ( pt[i] - _origin[i] ) / d[i];
786 if ( fabs(s[i]) < 1e-9 ) {
787 s[i] = 1e-9;
788 }
789 }
790 }
792 SnapManager const &m = _desktop->namedview->snap_manager;
794 /* Get a STL list of the selected items.
795 ** FIXME: this should probably be done by Inkscape::Selection.
796 */
797 std::list<SPItem const*> it;
798 for (GSList const *i = _selection->itemList(); i != NULL; i = i->next) {
799 it.push_back(reinterpret_cast<SPItem*>(i->data));
800 }
802 if ((state & GDK_CONTROL_MASK) || _desktop->isToolboxButtonActive ("lock")) {
803 /* Scale is locked to a 1:1 aspect ratio, so that s[X] must be made to equal s[Y].
804 ** To do this, we snap along a suitable constraint vector from the origin.
805 */
807 NR::Point const cv = NR::Point(
808 pt[NR::X] > _origin[NR::X] ? 1 : -1,
809 pt[NR::Y] > _origin[NR::Y] ? 1 : -1
810 );
812 std::pair<NR::scale, bool> bb = m.constrainedSnapScale(Snapper::BBOX_POINT,
813 _bbox_points,
814 it,
815 Snapper::ConstraintLine(_origin, cv),
816 s,
817 _origin);
819 std::pair<NR::scale, bool> sn = m.constrainedSnapScale(Snapper::SNAP_POINT,
820 _snap_points,
821 it,
822 Snapper::ConstraintLine(_origin, cv),
823 s,
824 _origin);
826 if (bb.second == false && sn.second == false) {
828 /* We didn't snap, so just lock aspect ratio */
829 if (fabs(s[NR::X]) > fabs(s[NR::Y])) {
830 s[NR::X] = fabs(s[NR::Y]) * sign(s[NR::X]);
831 } else {
832 s[NR::Y] = fabs(s[NR::X]) * sign(s[NR::Y]);
833 }
835 } else {
837 /* Choose the smaller difference in scale. Since s[X] == s[Y] we can
838 ** just compare difference in s[X].
839 */
840 double const bd = bb.second ? fabs(bb.first[NR::X] - s[NR::X]) : NR_HUGE;
841 double const sd = sn.second ? fabs(sn.first[NR::X] - s[NR::X]) : NR_HUGE;
842 s = (bd < sd) ? bb.first : sn.first;
843 }
845 } else {
846 /* Scale aspect ratio is unlocked */
848 std::pair<NR::scale, bool> bb = m.freeSnapScale(Snapper::BBOX_POINT,
849 _bbox_points,
850 it,
851 s,
852 _origin);
853 std::pair<NR::scale, bool> sn = m.freeSnapScale(Snapper::SNAP_POINT,
854 _snap_points,
855 it,
856 s,
857 _origin);
859 /* Pick the snap that puts us closest to the original scale */
860 NR::Coord bd = bb.second ?
861 fabs(NR::L2(NR::Point(bb.first[NR::X], bb.first[NR::Y])) -
862 NR::L2(NR::Point(s[NR::X], s[NR::Y])))
863 : NR_HUGE;
864 NR::Coord sd = sn.second ?
865 fabs(NR::L2(NR::Point(sn.first[NR::X], sn.first[NR::Y])) -
866 NR::L2(NR::Point(s[NR::X], s[NR::Y])))
867 : NR_HUGE;
868 s = (bd < sd) ? bb.first : sn.first;
869 }
871 /* Update the knot position */
872 pt = ( _point - _origin ) * s + _origin;
874 /* Status text */
875 _message_context.setF(Inkscape::NORMAL_MESSAGE,
876 _("<b>Scale</b>: %0.2f%% x %0.2f%%; with <b>Ctrl</b> to lock ratio"),
877 100 * s[NR::X], 100 * s[NR::Y]);
879 return TRUE;
880 }
882 gboolean Inkscape::SelTrans::stretchRequest(SPSelTransHandle const &handle, NR::Point &pt, guint state)
883 {
884 using NR::X;
885 using NR::Y;
887 NR::Dim2 axis, perp;
889 switch (handle.cursor) {
890 case GDK_TOP_SIDE:
891 case GDK_BOTTOM_SIDE:
892 axis = NR::Y;
893 perp = NR::X;
894 break;
895 case GDK_LEFT_SIDE:
896 case GDK_RIGHT_SIDE:
897 axis = NR::X;
898 perp = NR::Y;
899 break;
900 default:
901 g_assert_not_reached();
902 return TRUE;
903 };
905 if ( fabs( _point[axis] - _origin[axis] ) < 1e-15 ) {
906 return FALSE;
907 }
909 NR::scale s(1, 1);
910 s[axis] = ( ( pt[axis] - _origin[axis] )
911 / ( _point[axis] - _origin[axis] ) );
912 if ( fabs(s[axis]) < 1e-15 ) {
913 s[axis] = 1e-15;
914 }
916 /* Get a STL list of the selected items.
917 ** FIXME: this should probably be done by Inkscape::Selection.
918 */
919 std::list<SPItem const*> it;
920 for (GSList const *i = _selection->itemList(); i != NULL; i = i->next) {
921 it.push_back(reinterpret_cast<SPItem*>(i->data));
922 }
924 SnapManager const &m = _desktop->namedview->snap_manager;
926 if ( state & GDK_CONTROL_MASK ) {
927 s[perp] = fabs(s[axis]);
929 std::pair<NR::Coord, bool> const bb = m.freeSnapStretch(
930 Snapper::BBOX_POINT,
931 _bbox_points,
932 it,
933 s[axis],
934 _origin,
935 axis,
936 true);
938 std::pair<NR::Coord, bool> const sn = m.freeSnapStretch(
939 Snapper::SNAP_POINT,
940 _snap_points,
941 it,
942 s[axis],
943 _origin,
944 axis,
945 true);
947 NR::Coord const bd = bb.second ? fabs(bb.first - s[axis]) : NR_HUGE;
948 NR::Coord const sd = sn.second ? fabs(sn.first - s[axis]) : NR_HUGE;
949 NR::Coord const ratio = (bd < sd) ? bb.first : sn.first;
951 s[axis] = fabs(ratio) * sign(s[axis]);
952 s[perp] = fabs(s[axis]);
953 } else {
955 std::pair<NR::Coord, bool> const bb = m.freeSnapStretch(
956 Snapper::BBOX_POINT,
957 _bbox_points,
958 it,
959 s[axis],
960 _origin,
961 axis,
962 false);
964 std::pair<NR::Coord, bool> const sn = m.freeSnapStretch(
965 Snapper::SNAP_POINT,
966 _snap_points,
967 it,
968 s[axis],
969 _origin,
970 axis,
971 false);
973 /* Choose the smaller difference in scale */
974 NR::Coord const bd = bb.second ? fabs(bb.first - s[axis]) : NR_HUGE;
975 NR::Coord const sd = sn.second ? fabs(sn.first - s[axis]) : NR_HUGE;
976 s[axis] = (bd < sd) ? bb.first : sn.first;
977 s[perp] = 1;
978 }
980 pt = ( _point - _origin ) * NR::scale(s) + _origin;
981 if (isNaN(pt[X] + pt[Y])) {
982 g_warning("point=(%g, %g), norm=(%g, %g), s=(%g, %g)\n",
983 _point[X], _point[Y], _origin[X], _origin[Y], s[X], s[Y]);
984 }
986 // status text
987 _message_context.setF(Inkscape::NORMAL_MESSAGE,
988 _("<b>Scale</b>: %0.2f%% x %0.2f%%; with <b>Ctrl</b> to lock ratio"),
989 100 * s[NR::X], 100 * s[NR::Y]);
991 return TRUE;
992 }
994 gboolean Inkscape::SelTrans::skewRequest(SPSelTransHandle const &handle, NR::Point &pt, guint state)
995 {
996 using NR::X;
997 using NR::Y;
999 if (handle.cursor != GDK_SB_V_DOUBLE_ARROW && handle.cursor != GDK_SB_H_DOUBLE_ARROW) {
1000 return FALSE;
1001 }
1003 NR::Dim2 dim_a;
1004 NR::Dim2 dim_b;
1005 if (handle.cursor == GDK_SB_V_DOUBLE_ARROW) {
1006 dim_a = X;
1007 dim_b = Y;
1008 } else {
1009 dim_a = Y;
1010 dim_b = X;
1011 }
1013 double skew[2];
1014 double s[2] = { 1.0, 1.0 };
1016 if (fabs(_point[dim_a] - _origin[dim_a]) < NR_EPSILON) {
1017 return FALSE;
1018 }
1020 skew[dim_a] = ( pt[dim_b] - _point[dim_b] ) / ( _point[dim_a] - _origin[dim_a] );
1022 s[dim_a] = ( pt[dim_a] - _origin[dim_a] ) / ( _point[dim_a] - _origin[dim_a] );
1024 if ( fabs(s[dim_a]) < 1 ) {
1025 s[dim_a] = sign(s[dim_a]);
1026 } else {
1027 s[dim_a] = floor( s[dim_a] + 0.5 );
1028 }
1030 double radians = atan(skew[dim_a] / s[dim_a]);
1032 if (state & GDK_CONTROL_MASK) {
1034 int snaps = prefs_get_int_attribute("options.rotationsnapsperpi", "value", 12);
1036 if (snaps) {
1037 double sections = floor( radians * snaps / M_PI + .5 );
1038 if (fabs(sections) >= snaps / 2) sections = sign(sections) * (snaps / 2 - 1);
1039 radians = ( M_PI / snaps ) * sections;
1040 }
1041 skew[dim_a] = tan(radians) * s[dim_a];
1042 } else {
1043 SnapManager const &m = _desktop->namedview->snap_manager;
1045 std::pair<NR::Coord, bool> bb = m.freeSnapSkew(Inkscape::Snapper::BBOX_POINT,
1046 _bbox_points,
1047 std::list<SPItem const *>(),
1048 skew[dim_a],
1049 _origin,
1050 dim_a);
1052 std::pair<NR::Coord, bool> sn = m.freeSnapSkew(Inkscape::Snapper::SNAP_POINT,
1053 _snap_points,
1054 std::list<SPItem const *>(),
1055 skew[dim_a],
1056 _origin,
1057 dim_a);
1059 if (bb.second || sn.second) {
1060 /* We snapped something, so change the skew to reflect it */
1061 NR::Coord const bd = bb.second ? bb.first : NR_HUGE;
1062 NR::Coord const sd = sn.second ? sn.first : NR_HUGE;
1063 skew[dim_a] = std::min(bd, sd);
1064 }
1065 }
1067 pt[dim_b] = ( _point[dim_a] - _origin[dim_a] ) * skew[dim_a] + _point[dim_b];
1068 pt[dim_a] = ( _point[dim_a] - _origin[dim_a] ) * s[dim_a] + _origin[dim_a];
1070 /* status text */
1071 double degrees = 180 / M_PI * radians;
1072 if (degrees > 180) degrees -= 360;
1073 if (degrees < -180) degrees += 360;
1075 _message_context.setF(Inkscape::NORMAL_MESSAGE,
1076 // TRANSLATORS: don't modify the first ";"
1077 // (it will NOT be displayed as ";" - only the second one will be)
1078 _("<b>Skew</b>: %0.2f°; with <b>Ctrl</b> to snap angle"),
1079 degrees);
1081 return TRUE;
1082 }
1084 gboolean Inkscape::SelTrans::rotateRequest(NR::Point &pt, guint state)
1085 {
1086 int snaps = prefs_get_int_attribute("options.rotationsnapsperpi", "value", 12);
1088 // rotate affine in rotate
1089 NR::Point const d1 = _point - _origin;
1090 NR::Point const d2 = pt - _origin;
1092 NR::Coord const h1 = NR::L2(d1);
1093 if (h1 < 1e-15) return FALSE;
1094 NR::Point q1 = d1 / h1;
1095 NR::Coord const h2 = NR::L2(d2);
1096 if (fabs(h2) < 1e-15) return FALSE;
1097 NR::Point q2 = d2 / h2;
1099 double radians;
1100 if (state & GDK_CONTROL_MASK) {
1101 /* Have to restrict movement. */
1102 double cos_t = NR::dot(q1, q2);
1103 double sin_t = NR::dot(NR::rot90(q1), q2);
1104 radians = atan2(sin_t, cos_t);
1105 if (snaps) {
1106 radians = ( M_PI / snaps ) * floor( radians * snaps / M_PI + .5 );
1107 }
1108 q1 = NR::Point(1, 0);
1109 q2 = NR::Point(cos(radians), sin(radians));
1110 } else {
1111 radians = atan2(NR::dot(NR::rot90(d1), d2),
1112 NR::dot(d1, d2));
1113 }
1115 NR::rotate const r1(q1);
1116 NR::rotate const r2(q2);
1117 pt = _point * NR::translate(-_origin) * ( r2 / r1 ) * NR::translate(_origin);
1119 /* status text */
1120 double degrees = 180 / M_PI * radians;
1121 if (degrees > 180) degrees -= 360;
1122 if (degrees < -180) degrees += 360;
1124 _message_context.setF(Inkscape::NORMAL_MESSAGE,
1125 // TRANSLATORS: don't modify the first ";"
1126 // (it will NOT be displayed as ";" - only the second one will be)
1127 _("<b>Rotate</b>: %0.2f°; with <b>Ctrl</b> to snap angle"), degrees);
1129 return TRUE;
1130 }
1132 gboolean Inkscape::SelTrans::centerRequest(NR::Point &pt, guint state)
1133 {
1134 using NR::X;
1135 using NR::Y;
1137 SnapManager const &m = _desktop->namedview->snap_manager;
1138 pt = m.freeSnap(Snapper::SNAP_POINT, pt, NULL).getPoint();
1140 if (state & GDK_CONTROL_MASK) {
1141 if ( fabs(_point[X] - pt[X]) > fabs(_point[Y] - pt[Y]) ) {
1142 pt[Y] = _point[Y];
1143 } else {
1144 pt[X] = _point[X];
1145 }
1146 }
1148 if (!(state & GDK_SHIFT_MASK)) {
1149 // screen pixels to snap center to bbox
1150 #define SNAP_DIST 5
1151 // FIXME: take from prefs
1152 double snap_dist = SNAP_DIST / _desktop->current_zoom();
1154 for (int i = 0; i < 2; i++) {
1156 if (fabs(pt[i] - _box.min()[i]) < snap_dist) {
1157 pt[i] = _box.min()[i];
1158 }
1159 if (fabs(pt[i] - _box.midpoint()[i]) < snap_dist) {
1160 pt[i] = _box.midpoint()[i];
1161 }
1162 if (fabs(pt[i] - _box.max()[i]) < snap_dist) {
1163 pt[i] = _box.max()[i];
1164 }
1165 }
1166 }
1168 // status text
1169 GString *xs = SP_PX_TO_METRIC_STRING(pt[X], _desktop->namedview->getDefaultMetric());
1170 GString *ys = SP_PX_TO_METRIC_STRING(pt[Y], _desktop->namedview->getDefaultMetric());
1171 _message_context.setF(Inkscape::NORMAL_MESSAGE, _("Move <b>center</b> to %s, %s"), xs->str, ys->str);
1172 g_string_free(xs, FALSE);
1173 g_string_free(ys, FALSE);
1175 return TRUE;
1176 }
1178 /*
1179 * handlers for handle movement
1180 *
1181 */
1183 void sp_sel_trans_stretch(Inkscape::SelTrans *seltrans, SPSelTransHandle const &handle, NR::Point &pt, guint state)
1184 {
1185 seltrans->stretch(handle, pt, state);
1186 }
1188 void sp_sel_trans_scale(Inkscape::SelTrans *seltrans, SPSelTransHandle const &, NR::Point &pt, guint state)
1189 {
1190 seltrans->scale(pt, state);
1191 }
1193 void sp_sel_trans_skew(Inkscape::SelTrans *seltrans, SPSelTransHandle const &handle, NR::Point &pt, guint state)
1194 {
1195 seltrans->skew(handle, pt, state);
1196 }
1198 void sp_sel_trans_rotate(Inkscape::SelTrans *seltrans, SPSelTransHandle const &, NR::Point &pt, guint state)
1199 {
1200 seltrans->rotate(pt, state);
1201 }
1203 void Inkscape::SelTrans::stretch(SPSelTransHandle const &handle, NR::Point &pt, guint state)
1204 {
1205 using NR::X;
1206 using NR::Y;
1208 NR::Dim2 dim;
1209 switch (handle.cursor) {
1210 case GDK_LEFT_SIDE:
1211 case GDK_RIGHT_SIDE:
1212 dim = X;
1213 break;
1214 case GDK_TOP_SIDE:
1215 case GDK_BOTTOM_SIDE:
1216 dim = Y;
1217 break;
1218 default:
1219 g_assert_not_reached();
1220 abort();
1221 break;
1222 }
1224 NR::Point const scale_origin(_origin);
1225 double const offset = _point[dim] - scale_origin[dim];
1226 if (!( fabs(offset) >= 1e-15 )) {
1227 return;
1228 }
1229 NR::scale s(1, 1);
1230 s[dim] = ( pt[dim] - scale_origin[dim] ) / offset;
1231 if (isNaN(s[dim])) {
1232 g_warning("s[dim]=%g, pt[dim]=%g, scale_origin[dim]=%g, point[dim]=%g\n",
1233 s[dim], pt[dim], scale_origin[dim], _point[dim]);
1234 }
1235 if (!( fabs(s[dim]) >= 1e-15 )) {
1236 s[dim] = 1e-15;
1237 }
1238 if (state & GDK_CONTROL_MASK) {
1239 /* Preserve aspect ratio, but never flip in the dimension not being edited. */
1240 s[!dim] = fabs(s[dim]);
1241 }
1243 NR::Point new_bbox_min = _box.min() * (NR::translate(-scale_origin) * NR::Matrix(s) * NR::translate(scale_origin));
1244 NR::Point new_bbox_max = _box.max() * (NR::translate(-scale_origin) * NR::Matrix(s) * NR::translate(scale_origin));
1246 int transform_stroke = prefs_get_int_attribute ("options.transform", "stroke", 1);
1247 NR::Matrix scaler = get_scale_transform_with_stroke (_box, _strokewidth, transform_stroke,
1248 new_bbox_min[NR::X], new_bbox_min[NR::Y], new_bbox_max[NR::X], new_bbox_max[NR::Y]);
1250 transform(scaler, NR::Point(0, 0)); // we have already accounted for origin, so pass 0,0
1251 }
1253 void Inkscape::SelTrans::scale(NR::Point &pt, guint state)
1254 {
1255 NR::Point const offset = _point - _origin;
1257 NR::scale s (1, 1);
1258 for (int i = NR::X; i <= NR::Y; i++) {
1259 if (fabs(offset[i]) > 1e-9)
1260 s[i] = (pt[i] - _origin[i]) / offset[i];
1261 if (fabs(s[i]) < 1e-9)
1262 s[i] = 1e-9;
1263 }
1264 NR::Point new_bbox_min = _box.min() * (NR::translate(-_origin) * NR::Matrix(s) * NR::translate(_origin));
1265 NR::Point new_bbox_max = _box.max() * (NR::translate(-_origin) * NR::Matrix(s) * NR::translate(_origin));
1267 int transform_stroke = prefs_get_int_attribute ("options.transform", "stroke", 1);
1268 NR::Matrix scaler = get_scale_transform_with_stroke (_box, _strokewidth, transform_stroke,
1269 new_bbox_min[NR::X], new_bbox_min[NR::Y], new_bbox_max[NR::X], new_bbox_max[NR::Y]);
1271 transform(scaler, NR::Point(0, 0)); // we have already accounted for origin, so pass 0,0
1272 }
1274 void Inkscape::SelTrans::skew(SPSelTransHandle const &handle, NR::Point &pt, guint state)
1275 {
1276 NR::Point const offset = _point - _origin;
1278 unsigned dim;
1279 switch (handle.cursor) {
1280 case GDK_SB_H_DOUBLE_ARROW:
1281 dim = NR::Y;
1282 break;
1283 case GDK_SB_V_DOUBLE_ARROW:
1284 dim = NR::X;
1285 break;
1286 default:
1287 g_assert_not_reached();
1288 abort();
1289 break;
1290 }
1291 if (fabs(offset[dim]) < 1e-15) {
1292 return;
1293 }
1294 NR::Matrix skew = NR::identity();
1295 skew[2*dim + dim] = (pt[dim] - _origin[dim]) / offset[dim];
1296 skew[2*dim + (1-dim)] = (pt[1-dim] - _point[1-dim]) / offset[dim];
1297 skew[2*(1-dim) + (dim)] = 0;
1298 skew[2*(1-dim) + (1-dim)] = 1;
1300 for (int i = 0; i < 2; i++) {
1301 if (fabs(skew[3*i]) < 1e-15) {
1302 skew[3*i] = 1e-15;
1303 }
1304 }
1305 transform(skew, _origin);
1306 }
1308 void Inkscape::SelTrans::rotate(NR::Point &pt, guint state)
1309 {
1310 NR::Point const offset = _point - _origin;
1312 NR::Coord const h1 = NR::L2(offset);
1313 if (h1 < 1e-15) {
1314 return;
1315 }
1316 NR::Point const q1 = offset / h1;
1317 NR::Coord const h2 = NR::L2( pt - _origin );
1318 if (h2 < 1e-15) {
1319 return;
1320 }
1321 NR::Point const q2 = (pt - _origin) / h2;
1322 NR::rotate const r1(q1);
1323 NR::rotate const r2(q2);
1325 NR::Matrix rotate( r2 / r1 );
1326 transform(rotate, _origin);
1327 }
1329 void sp_sel_trans_center(Inkscape::SelTrans *seltrans, SPSelTransHandle const &, NR::Point &pt, guint state)
1330 {
1331 seltrans->setCenter(pt);
1332 }
1335 void Inkscape::SelTrans::moveTo(NR::Point const &xy, guint state)
1336 {
1337 SnapManager const &m = _desktop->namedview->snap_manager;
1339 /* The amount that we've moved by during this drag */
1340 NR::Point dxy = xy - _point;
1342 /* Get a STL list of the selected items.
1343 ** FIXME: this should probably be done by Inkscape::Selection.
1344 */
1345 std::list<SPItem const*> it;
1346 for (GSList const *i = _selection->itemList(); i != NULL; i = i->next) {
1347 it.push_back(reinterpret_cast<SPItem*>(i->data));
1348 }
1350 bool const alt = (state & GDK_MOD1_MASK);
1351 bool const control = (state & GDK_CONTROL_MASK);
1352 bool const shift = (state & GDK_SHIFT_MASK);
1354 if (alt) {
1356 /* Alt pressed means keep offset: snap the moved distance to the grid.
1357 ** FIXME: this will snap to more than just the grid, nowadays.
1358 */
1360 dxy = m.freeSnap(Snapper::SNAP_POINT, dxy, NULL).getPoint();
1362 } else if (!shift) {
1364 /* We're snapping to things, possibly with a constraint to horizontal or
1365 ** vertical movement. Obtain a list of possible translations and then
1366 ** pick the smallest.
1367 */
1369 /* This will be our list of possible translations */
1370 std::list<std::pair<NR::Point, bool> > s;
1372 if (control) {
1374 /* Snap to things, and also constrain to horizontal or vertical movement */
1376 for (unsigned int dim = 0; dim < 2; dim++) {
1377 s.push_back(m.constrainedSnapTranslation(Inkscape::Snapper::BBOX_POINT,
1378 _bbox_points,
1379 it,
1380 Inkscape::Snapper::ConstraintLine(component_vectors[dim]),
1381 dxy));
1383 s.push_back(m.constrainedSnapTranslation(Inkscape::Snapper::SNAP_POINT,
1384 _snap_points,
1385 it,
1386 Inkscape::Snapper::ConstraintLine(component_vectors[dim]),
1387 dxy));
1388 }
1390 } else {
1392 /* Snap to things with no constraint */
1394 s.push_back(m.freeSnapTranslation(Inkscape::Snapper::BBOX_POINT,
1395 _bbox_points, it, dxy));
1396 s.push_back(m.freeSnapTranslation(Inkscape::Snapper::SNAP_POINT,
1397 _snap_points, it, dxy));
1398 }
1400 /* Pick one */
1401 NR::Coord best = NR_HUGE;
1402 for (std::list<std::pair<NR::Point, bool> >::const_iterator i = s.begin(); i != s.end(); i++) {
1403 if (i->second) {
1404 NR::Coord const m = NR::L2(i->first);
1405 if (m < best) {
1406 best = m;
1407 dxy = i->first;
1408 }
1409 }
1410 }
1411 }
1413 if (control) {
1414 /* Ensure that the horizontal and vertical constraint has been applied */
1415 if (fabs(dxy[NR::X]) > fabs(dxy[NR::Y])) {
1416 dxy[NR::Y] = 0;
1417 } else {
1418 dxy[NR::X] = 0;
1419 }
1420 }
1422 NR::Matrix const move((NR::translate(dxy)));
1423 NR::Point const norm(0, 0);
1424 transform(move, norm);
1426 // status text
1427 GString *xs = SP_PX_TO_METRIC_STRING(dxy[NR::X], _desktop->namedview->getDefaultMetric());
1428 GString *ys = SP_PX_TO_METRIC_STRING(dxy[NR::Y], _desktop->namedview->getDefaultMetric());
1429 _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);
1430 g_string_free(xs, TRUE);
1431 g_string_free(ys, TRUE);
1432 }
1435 /*
1436 Local Variables:
1437 mode:c++
1438 c-file-style:"stroustrup"
1439 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
1440 indent-tabs-mode:nil
1441 fill-column:99
1442 End:
1443 */
1444 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4 :