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 bool sp_sel_trans_handle_request(SPKnot *knot, NR::Point *p, guint state, bool *data);
58 extern GdkPixbuf *handles[];
60 static bool 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 _("Set center"));
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);
324 _grabbed = false;
325 _show_handles = true;
327 Inkscape::Selection *selection = sp_desktop_selection(_desktop);
328 bool updh = true;
329 if (!_empty && _changed) {
330 sp_selection_apply_affine(selection, _current, (_show == SHOW_OUTLINE)? true : false);
331 _center *= _current;
332 _center_is_set = true;
334 // If dragging showed content live, sp_selection_apply_affine cannot change the centers
335 // appropriately - it does not know the original positions of the centers (all objects already have
336 // the new bboxes). So we need to reset the centers from our saved array.
337 if (_show != SHOW_OUTLINE && !_current.is_translation()) {
338 for (unsigned i = 0; i < _items_centers.size(); i++) {
339 SPItem *currentItem = _items_centers[i].first;
340 if (currentItem->isCenterSet()) { // only if it's already set
341 currentItem->setCenter (_items_centers[i].second * _current);
342 SP_OBJECT(currentItem)->updateRepr();
343 }
344 }
345 }
347 if (_current.is_translation()) {
348 sp_document_done(sp_desktop_document(_desktop), SP_VERB_CONTEXT_SELECT,
349 _("Move"));
350 } else if (_current.is_scale()) {
351 sp_document_done(sp_desktop_document(_desktop), SP_VERB_CONTEXT_SELECT,
352 _("Scale"));
353 } else if (_current.is_rotation()) {
354 sp_document_done(sp_desktop_document(_desktop), SP_VERB_CONTEXT_SELECT,
355 _("Rotate"));
356 } else {
357 sp_document_done(sp_desktop_document(_desktop), SP_VERB_CONTEXT_SELECT,
358 _("Skew"));
359 }
361 updh = false;
362 }
364 for (unsigned i = 0; i < _items.size(); i++) {
365 sp_object_unref(SP_OBJECT(_items[i].first), NULL);
366 }
367 _items.clear();
368 _items_centers.clear();
370 sp_canvas_item_hide(_norm);
371 sp_canvas_item_hide(_grip);
373 if (_show == SHOW_OUTLINE) {
374 for (int i = 0; i < 4; i++)
375 sp_canvas_item_hide(_l[i]);
376 }
378 _updateVolatileState();
379 if (updh) {
380 _updateHandles();
381 }
382 if (_stamp_cache) {
383 g_slist_free(_stamp_cache);
384 _stamp_cache = NULL;
385 }
387 _message_context.clear();
388 }
390 /* fixme: This is really bad, as we compare positions for each stamp (Lauris) */
391 /* fixme: IMHO the best way to keep sort cache would be to implement timestamping at last */
393 void Inkscape::SelTrans::stamp()
394 {
395 Inkscape::Selection *selection = sp_desktop_selection(_desktop);
397 bool fixup = !_grabbed;
398 if ( fixup && _stamp_cache ) {
399 // TODO - give a proper fix. Simple temproary work-around for the grab() issue
400 g_slist_free(_stamp_cache);
401 _stamp_cache = NULL;
402 }
404 /* stamping mode */
405 if (!_empty) {
406 GSList *l;
407 if (_stamp_cache) {
408 l = _stamp_cache;
409 } else {
410 /* Build cache */
411 l = g_slist_copy((GSList *) selection->itemList());
412 l = g_slist_sort(l, (GCompareFunc) sp_object_compare_position);
413 _stamp_cache = l;
414 }
416 while (l) {
417 SPItem *original_item = SP_ITEM(l->data);
418 Inkscape::XML::Node *original_repr = SP_OBJECT_REPR(original_item);
420 // remember the position of the item
421 gint pos = original_repr->position();
422 // remember parent
423 Inkscape::XML::Node *parent = sp_repr_parent(original_repr);
425 Inkscape::XML::Node *copy_repr = original_repr->duplicate();
427 // add the new repr to the parent
428 parent->appendChild(copy_repr);
429 // move to the saved position
430 copy_repr->setPosition(pos > 0 ? pos : 0);
432 SPItem *copy_item = (SPItem *) sp_desktop_document(_desktop)->getObjectByRepr(copy_repr);
434 NR::Matrix const *new_affine;
435 if (_show == SHOW_OUTLINE) {
436 NR::Matrix const i2d(sp_item_i2d_affine(original_item));
437 NR::Matrix const i2dnew( i2d * _current );
438 sp_item_set_i2d_affine(copy_item, i2dnew);
439 new_affine = ©_item->transform;
440 } else {
441 new_affine = &original_item->transform;
442 }
444 sp_item_write_transform(copy_item, copy_repr, *new_affine);
446 if (copy_item->isCenterSet()) {
447 copy_item->setCenter(_center * _current);
448 }
450 Inkscape::GC::release(copy_repr);
451 l = l->next;
452 }
453 sp_document_done(sp_desktop_document(_desktop), SP_VERB_CONTEXT_SELECT,
454 _("Stamp"));
455 }
457 if ( fixup && _stamp_cache ) {
458 // TODO - give a proper fix. Simple temproary work-around for the grab() issue
459 g_slist_free(_stamp_cache);
460 _stamp_cache = NULL;
461 }
462 }
464 void Inkscape::SelTrans::_updateHandles()
465 {
466 if ( !_show_handles || _empty )
467 {
468 sp_remove_handles(_shandle, 8);
469 sp_remove_handles(_rhandle, 8);
470 sp_remove_handles(&_chandle, 1);
471 return;
472 }
474 // center handle
475 if ( _chandle == NULL ) {
476 _chandle = sp_knot_new(_desktop, _("<b>Center</b> of rotation and skewing: drag to reposition; scaling with Shift also uses this center"));
478 _chandle->setShape (SP_CTRL_SHAPE_BITMAP);
479 _chandle->setSize (13);
480 _chandle->setAnchor (handle_center.anchor);
481 _chandle->setMode (SP_CTRL_MODE_XOR);
482 _chandle->setFill(0x00000000, 0x00000000, 0x00000000);
483 _chandle->setStroke(0x000000ff, 0xff0000b0, 0xff0000b0);
484 _chandle->setPixbuf(handles[handle_center.control]);
485 sp_knot_update_ctrl(_chandle);
487 g_signal_connect(G_OBJECT(_chandle), "request",
488 G_CALLBACK(sp_sel_trans_handle_request), (gpointer) &handle_center);
489 g_signal_connect(G_OBJECT(_chandle), "moved",
490 G_CALLBACK(sp_sel_trans_handle_new_event), (gpointer) &handle_center);
491 g_signal_connect(G_OBJECT(_chandle), "grabbed",
492 G_CALLBACK(sp_sel_trans_handle_grab), (gpointer) &handle_center);
493 g_signal_connect(G_OBJECT(_chandle), "ungrabbed",
494 G_CALLBACK(sp_sel_trans_handle_ungrab), (gpointer) &handle_center);
495 g_signal_connect(G_OBJECT(_chandle), "clicked",
496 G_CALLBACK(sp_sel_trans_handle_click), (gpointer) &handle_center);
497 }
499 sp_remove_handles(&_chandle, 1);
500 if ( _state == STATE_SCALE ) {
501 sp_remove_handles(_rhandle, 8);
502 _showHandles(_shandle, handles_scale, 8,
503 _("<b>Squeeze or stretch</b> selection; with <b>Ctrl</b> to scale uniformly; with <b>Shift</b> to scale around rotation center"),
504 _("<b>Scale</b> selection; with <b>Ctrl</b> to scale uniformly; with <b>Shift</b> to scale around rotation center"));
505 } else {
506 sp_remove_handles(_shandle, 8);
507 _showHandles(_rhandle, handles_rotate, 8,
508 _("<b>Skew</b> selection; with <b>Ctrl</b> to snap angle; with <b>Shift</b> to skew around the opposite side"),
509 _("<b>Rotate</b> selection; with <b>Ctrl</b> to snap angle; with <b>Shift</b> to rotate around the opposite corner"));
510 }
512 if (!_center_is_set) {
513 _center = _desktop->selection->center();
514 _center_is_set = true;
515 }
517 if ( _state == STATE_SCALE ) {
518 sp_knot_hide(_chandle);
519 } else {
520 sp_knot_show(_chandle);
521 sp_knot_moveto(_chandle, &_center);
522 }
523 }
525 void Inkscape::SelTrans::_updateVolatileState()
526 {
527 Inkscape::Selection *selection = sp_desktop_selection(_desktop);
528 _empty = selection->isEmpty();
530 if (_empty) {
531 return;
532 }
534 _box = selection->bounds();
535 if (_box.isEmpty()) {
536 _empty = true;
537 return;
538 }
540 _strokewidth = stroke_average_width (selection->itemList());
542 _current.set_identity();
543 }
545 static void sp_remove_handles(SPKnot *knot[], gint num)
546 {
547 for (int i = 0; i < num; i++) {
548 if (knot[i] != NULL) {
549 sp_knot_hide(knot[i]);
550 }
551 }
552 }
554 void Inkscape::SelTrans::_showHandles(SPKnot *knot[], SPSelTransHandle const handle[], gint num,
555 gchar const *even_tip, gchar const *odd_tip)
556 {
557 g_return_if_fail( !_empty );
559 for (int i = 0; i < num; i++) {
560 if (knot[i] == NULL) {
561 knot[i] = sp_knot_new(_desktop, i % 2 ? even_tip : odd_tip);
563 knot[i]->setShape (SP_CTRL_SHAPE_BITMAP);
564 knot[i]->setSize (13);
565 knot[i]->setAnchor (handle[i].anchor);
566 knot[i]->setMode (SP_CTRL_MODE_XOR);
567 knot[i]->setFill(0x000000ff, 0x00ff6600, 0x00ff6600); // inversion, green, green
568 knot[i]->setStroke(0x000000ff, 0x000000ff, 0x000000ff); // inversion
569 knot[i]->setPixbuf(handles[handle[i].control]);
570 sp_knot_update_ctrl(knot[i]);
572 g_signal_connect(G_OBJECT(knot[i]), "request",
573 G_CALLBACK(sp_sel_trans_handle_request), (gpointer) &handle[i]);
574 g_signal_connect(G_OBJECT(knot[i]), "moved",
575 G_CALLBACK(sp_sel_trans_handle_new_event), (gpointer) &handle[i]);
576 g_signal_connect(G_OBJECT(knot[i]), "grabbed",
577 G_CALLBACK(sp_sel_trans_handle_grab), (gpointer) &handle[i]);
578 g_signal_connect(G_OBJECT(knot[i]), "ungrabbed",
579 G_CALLBACK(sp_sel_trans_handle_ungrab), (gpointer) &handle[i]);
580 g_signal_connect(G_OBJECT(knot[i]), "event", G_CALLBACK(sp_seltrans_handle_event), (gpointer) &handle[i]);
581 }
582 sp_knot_show(knot[i]);
584 NR::Point const handle_pt(handle[i].x, handle[i].y);
585 NR::Point p( _box.min()
586 + ( _box.dimensions()
587 * NR::scale(handle_pt) ) );
589 sp_knot_moveto(knot[i], &p);
590 }
591 }
593 static void sp_sel_trans_handle_grab(SPKnot *knot, guint state, gpointer data)
594 {
595 SP_SELECT_CONTEXT(knot->desktop->event_context)->_seltrans->handleGrab(
596 knot, state, *(SPSelTransHandle const *) data
597 );
598 }
600 static void sp_sel_trans_handle_ungrab(SPKnot *knot, guint state, gpointer data)
601 {
602 SP_SELECT_CONTEXT(knot->desktop->event_context)->_seltrans->ungrab();
603 }
605 static void sp_sel_trans_handle_new_event(SPKnot *knot, NR::Point *position, guint state, gpointer data)
606 {
607 SP_SELECT_CONTEXT(knot->desktop->event_context)->_seltrans->handleNewEvent(
608 knot, position, state, *(SPSelTransHandle const *) data
609 );
610 }
612 static bool sp_sel_trans_handle_request(SPKnot *knot, NR::Point *position, guint state, bool *data)
613 {
614 return SP_SELECT_CONTEXT(knot->desktop->event_context)->_seltrans->handleRequest(
615 knot, position, state, *(SPSelTransHandle const *) data
616 );
617 }
619 static void sp_sel_trans_handle_click(SPKnot *knot, guint state, gpointer data)
620 {
621 SP_SELECT_CONTEXT(knot->desktop->event_context)->_seltrans->handleClick(
622 knot, state, *(SPSelTransHandle const *) data
623 );
624 }
626 void Inkscape::SelTrans::handleClick(SPKnot *knot, guint state, SPSelTransHandle const &handle)
627 {
628 switch (handle.anchor) {
629 case GTK_ANCHOR_CENTER:
630 if (state & GDK_SHIFT_MASK) {
631 // Unset the center position for all selected items
632 for (GSList const *l = _desktop->selection->itemList(); l; l = l->next) {
633 SPItem *it = (SPItem*)sp_object_ref(SP_OBJECT(l->data), NULL);
634 it->unsetCenter();
635 SP_OBJECT(it)->updateRepr();
636 _center_is_set = false; // center has changed
637 _updateHandles();
638 }
639 sp_document_maybe_done (sp_desktop_document(_desktop), "center::unset", SP_VERB_CONTEXT_SELECT,
640 _("Reset center"));
641 }
642 break;
643 default:
644 break;
645 }
646 }
648 void Inkscape::SelTrans::handleGrab(SPKnot *knot, guint state, SPSelTransHandle const &handle)
649 {
650 switch (handle.anchor) {
651 case GTK_ANCHOR_CENTER:
652 g_object_set(G_OBJECT(_grip),
653 "shape", SP_CTRL_SHAPE_BITMAP,
654 "size", 13.0,
655 NULL);
656 sp_canvas_item_show(_grip);
657 break;
658 default:
659 g_object_set(G_OBJECT(_grip),
660 "shape", SP_CTRL_SHAPE_CROSS,
661 "size", 7.0,
662 NULL);
663 sp_canvas_item_show(_norm);
664 sp_canvas_item_show(_grip);
666 break;
667 }
669 grab(sp_knot_position(knot), handle.x, handle.y, FALSE);
670 }
673 void Inkscape::SelTrans::handleNewEvent(SPKnot *knot, NR::Point *position, guint state, SPSelTransHandle const &handle)
674 {
675 if (!SP_KNOT_IS_GRABBED(knot)) {
676 return;
677 }
679 // in case items have been unhooked from the document, don't
680 // try to continue processing events for them.
681 for (unsigned int i = 0; i < _items.size(); i++) {
682 if (!SP_OBJECT_DOCUMENT(SP_OBJECT(_items[i].first)) ) {
683 return;
684 }
685 }
687 handle.action(this, handle, *position, state);
688 }
691 bool Inkscape::SelTrans::handleRequest(SPKnot *knot, NR::Point *position, guint state, SPSelTransHandle const &handle)
692 {
693 if (!SP_KNOT_IS_GRABBED(knot)) {
694 return TRUE;
695 }
697 knot->desktop->set_coordinate_status(*position);
698 knot->desktop->setPosition(*position);
701 if (state & GDK_MOD1_MASK) {
702 *position = _point + ( *position - _point ) / 10;
703 }
705 if (!(state & GDK_SHIFT_MASK) == !(_state == STATE_ROTATE)) {
706 _origin = _opposite;
707 } else {
708 _origin = _center;
709 }
710 if (handle.request(this, handle, *position, state)) {
711 sp_knot_set_position(knot, position, state);
712 SP_CTRL(_grip)->moveto(*position);
713 SP_CTRL(_norm)->moveto(_origin);
714 }
716 return TRUE;
717 }
720 void Inkscape::SelTrans::_selChanged(Inkscape::Selection *selection)
721 {
722 if (!_grabbed) {
723 _updateVolatileState();
724 _center_is_set = false; // center(s) may have changed
725 _updateHandles();
726 }
727 }
729 void Inkscape::SelTrans::_selModified(Inkscape::Selection *selection, guint flags)
730 {
731 if (!_grabbed) {
732 _updateVolatileState();
734 // reset internal flag
735 _changed = false;
737 _center_is_set = false; // center(s) may have changed
739 _updateHandles();
740 }
741 }
743 /*
744 * handlers for handle move-request
745 */
747 /** Returns -1 or 1 according to the sign of x. Returns 1 for 0 and NaN. */
748 static double sign(double const x)
749 {
750 return ( x < 0
751 ? -1
752 : 1 );
753 }
755 bool sp_sel_trans_scale_request(Inkscape::SelTrans *seltrans,
756 SPSelTransHandle const &, NR::Point &pt, guint state)
757 {
758 return seltrans->scaleRequest(pt, state);
759 }
761 bool sp_sel_trans_stretch_request(Inkscape::SelTrans *seltrans,
762 SPSelTransHandle const &handle, NR::Point &pt, guint state)
763 {
764 return seltrans->stretchRequest(handle, pt, state);
765 }
767 bool sp_sel_trans_skew_request(Inkscape::SelTrans *seltrans,
768 SPSelTransHandle const &handle, NR::Point &pt, guint state)
769 {
770 return seltrans->skewRequest(handle, pt, state);
771 }
773 bool sp_sel_trans_rotate_request(Inkscape::SelTrans *seltrans,
774 SPSelTransHandle const &, NR::Point &pt, guint state)
775 {
776 return seltrans->rotateRequest(pt, state);
777 }
779 bool sp_sel_trans_center_request(Inkscape::SelTrans *seltrans,
780 SPSelTransHandle const &, NR::Point &pt, guint state)
781 {
782 return seltrans->centerRequest(pt, state);
783 }
785 bool Inkscape::SelTrans::scaleRequest(NR::Point &pt, guint state)
786 {
787 using NR::X;
788 using NR::Y;
790 NR::Point d = _point - _origin;
791 NR::scale s(0, 0);
793 /* Work out the new scale factors `s' */
794 for ( unsigned int i = 0 ; i < 2 ; i++ ) {
795 if ( fabs(d[i]) > 0.001 ) {
796 s[i] = ( pt[i] - _origin[i] ) / d[i];
797 if ( fabs(s[i]) < 1e-9 ) {
798 s[i] = 1e-9;
799 }
800 }
801 }
803 SnapManager const &m = _desktop->namedview->snap_manager;
805 /* Get a STL list of the selected items.
806 ** FIXME: this should probably be done by Inkscape::Selection.
807 */
808 std::list<SPItem const*> it;
809 for (GSList const *i = _selection->itemList(); i != NULL; i = i->next) {
810 it.push_back(reinterpret_cast<SPItem*>(i->data));
811 }
813 if ((state & GDK_CONTROL_MASK) || _desktop->isToolboxButtonActive ("lock")) {
814 /* Scale is locked to a 1:1 aspect ratio, so that s[X] must be made to equal s[Y].
815 ** To do this, we snap along a suitable constraint vector from the origin.
816 */
818 NR::Point const cv = NR::Point(
819 pt[NR::X] > _origin[NR::X] ? 1 : -1,
820 pt[NR::Y] > _origin[NR::Y] ? 1 : -1
821 );
823 std::pair<NR::scale, bool> bb = m.constrainedSnapScale(Snapper::BBOX_POINT,
824 _bbox_points,
825 it,
826 Snapper::ConstraintLine(_origin, cv),
827 s,
828 _origin);
830 std::pair<NR::scale, bool> sn = m.constrainedSnapScale(Snapper::SNAP_POINT,
831 _snap_points,
832 it,
833 Snapper::ConstraintLine(_origin, cv),
834 s,
835 _origin);
837 if (bb.second == false && sn.second == false) {
839 /* We didn't snap, so just lock aspect ratio */
840 if (fabs(s[NR::X]) > fabs(s[NR::Y])) {
841 s[NR::X] = fabs(s[NR::Y]) * sign(s[NR::X]);
842 } else {
843 s[NR::Y] = fabs(s[NR::X]) * sign(s[NR::Y]);
844 }
846 } else {
848 /* Choose the smaller difference in scale. Since s[X] == s[Y] we can
849 ** just compare difference in s[X].
850 */
851 double const bd = bb.second ? fabs(bb.first[NR::X] - s[NR::X]) : NR_HUGE;
852 double const sd = sn.second ? fabs(sn.first[NR::X] - s[NR::X]) : NR_HUGE;
853 s = (bd < sd) ? bb.first : sn.first;
854 }
856 } else {
857 /* Scale aspect ratio is unlocked */
859 std::pair<NR::scale, bool> bb = m.freeSnapScale(Snapper::BBOX_POINT,
860 _bbox_points,
861 it,
862 s,
863 _origin);
864 std::pair<NR::scale, bool> sn = m.freeSnapScale(Snapper::SNAP_POINT,
865 _snap_points,
866 it,
867 s,
868 _origin);
870 /* Pick the snap that puts us closest to the original scale */
871 NR::Coord bd = bb.second ?
872 fabs(NR::L2(NR::Point(bb.first[NR::X], bb.first[NR::Y])) -
873 NR::L2(NR::Point(s[NR::X], s[NR::Y])))
874 : NR_HUGE;
875 NR::Coord sd = sn.second ?
876 fabs(NR::L2(NR::Point(sn.first[NR::X], sn.first[NR::Y])) -
877 NR::L2(NR::Point(s[NR::X], s[NR::Y])))
878 : NR_HUGE;
879 s = (bd < sd) ? bb.first : sn.first;
880 }
882 /* Update the knot position */
883 pt = ( _point - _origin ) * s + _origin;
885 /* Status text */
886 _message_context.setF(Inkscape::NORMAL_MESSAGE,
887 _("<b>Scale</b>: %0.2f%% x %0.2f%%; with <b>Ctrl</b> to lock ratio"),
888 100 * s[NR::X], 100 * s[NR::Y]);
890 return TRUE;
891 }
893 bool Inkscape::SelTrans::stretchRequest(SPSelTransHandle const &handle, NR::Point &pt, guint state)
894 {
895 using NR::X;
896 using NR::Y;
898 NR::Dim2 axis, perp;
900 switch (handle.cursor) {
901 case GDK_TOP_SIDE:
902 case GDK_BOTTOM_SIDE:
903 axis = NR::Y;
904 perp = NR::X;
905 break;
906 case GDK_LEFT_SIDE:
907 case GDK_RIGHT_SIDE:
908 axis = NR::X;
909 perp = NR::Y;
910 break;
911 default:
912 g_assert_not_reached();
913 return TRUE;
914 };
916 if ( fabs( _point[axis] - _origin[axis] ) < 1e-15 ) {
917 return FALSE;
918 }
920 NR::scale s(1, 1);
921 s[axis] = ( ( pt[axis] - _origin[axis] )
922 / ( _point[axis] - _origin[axis] ) );
923 if ( fabs(s[axis]) < 1e-15 ) {
924 s[axis] = 1e-15;
925 }
927 /* Get a STL list of the selected items.
928 ** FIXME: this should probably be done by Inkscape::Selection.
929 */
930 std::list<SPItem const*> it;
931 for (GSList const *i = _selection->itemList(); i != NULL; i = i->next) {
932 it.push_back(reinterpret_cast<SPItem*>(i->data));
933 }
935 SnapManager const &m = _desktop->namedview->snap_manager;
937 if ( state & GDK_CONTROL_MASK ) {
938 s[perp] = fabs(s[axis]);
940 std::pair<NR::Coord, bool> const bb = m.freeSnapStretch(
941 Snapper::BBOX_POINT,
942 _bbox_points,
943 it,
944 s[axis],
945 _origin,
946 axis,
947 true);
949 std::pair<NR::Coord, bool> const sn = m.freeSnapStretch(
950 Snapper::SNAP_POINT,
951 _snap_points,
952 it,
953 s[axis],
954 _origin,
955 axis,
956 true);
958 NR::Coord const bd = bb.second ? fabs(bb.first - s[axis]) : NR_HUGE;
959 NR::Coord const sd = sn.second ? fabs(sn.first - s[axis]) : NR_HUGE;
960 NR::Coord const ratio = (bd < sd) ? bb.first : sn.first;
962 s[axis] = fabs(ratio) * sign(s[axis]);
963 s[perp] = fabs(s[axis]);
964 } else {
966 std::pair<NR::Coord, bool> const bb = m.freeSnapStretch(
967 Snapper::BBOX_POINT,
968 _bbox_points,
969 it,
970 s[axis],
971 _origin,
972 axis,
973 false);
975 std::pair<NR::Coord, bool> const sn = m.freeSnapStretch(
976 Snapper::SNAP_POINT,
977 _snap_points,
978 it,
979 s[axis],
980 _origin,
981 axis,
982 false);
984 /* Choose the smaller difference in scale */
985 NR::Coord const bd = bb.second ? fabs(bb.first - s[axis]) : NR_HUGE;
986 NR::Coord const sd = sn.second ? fabs(sn.first - s[axis]) : NR_HUGE;
987 s[axis] = (bd < sd) ? bb.first : sn.first;
988 s[perp] = 1;
989 }
991 pt = ( _point - _origin ) * NR::scale(s) + _origin;
992 if (isNaN(pt[X] + pt[Y])) {
993 g_warning("point=(%g, %g), norm=(%g, %g), s=(%g, %g)\n",
994 _point[X], _point[Y], _origin[X], _origin[Y], s[X], s[Y]);
995 }
997 // status text
998 _message_context.setF(Inkscape::NORMAL_MESSAGE,
999 _("<b>Scale</b>: %0.2f%% x %0.2f%%; with <b>Ctrl</b> to lock ratio"),
1000 100 * s[NR::X], 100 * s[NR::Y]);
1002 return TRUE;
1003 }
1005 bool Inkscape::SelTrans::skewRequest(SPSelTransHandle const &handle, NR::Point &pt, guint state)
1006 {
1007 using NR::X;
1008 using NR::Y;
1010 if (handle.cursor != GDK_SB_V_DOUBLE_ARROW && handle.cursor != GDK_SB_H_DOUBLE_ARROW) {
1011 return FALSE;
1012 }
1014 NR::Dim2 dim_a;
1015 NR::Dim2 dim_b;
1016 if (handle.cursor == GDK_SB_V_DOUBLE_ARROW) {
1017 dim_a = X;
1018 dim_b = Y;
1019 } else {
1020 dim_a = Y;
1021 dim_b = X;
1022 }
1024 double skew[2];
1025 double s[2] = { 1.0, 1.0 };
1027 if (fabs(_point[dim_a] - _origin[dim_a]) < NR_EPSILON) {
1028 return FALSE;
1029 }
1031 skew[dim_a] = ( pt[dim_b] - _point[dim_b] ) / ( _point[dim_a] - _origin[dim_a] );
1033 s[dim_a] = ( pt[dim_a] - _origin[dim_a] ) / ( _point[dim_a] - _origin[dim_a] );
1035 if ( fabs(s[dim_a]) < 1 ) {
1036 s[dim_a] = sign(s[dim_a]);
1037 } else {
1038 s[dim_a] = floor( s[dim_a] + 0.5 );
1039 }
1041 double radians = atan(skew[dim_a] / s[dim_a]);
1043 if (state & GDK_CONTROL_MASK) {
1045 int snaps = prefs_get_int_attribute("options.rotationsnapsperpi", "value", 12);
1047 if (snaps) {
1048 double sections = floor( radians * snaps / M_PI + .5 );
1049 if (fabs(sections) >= snaps / 2) sections = sign(sections) * (snaps / 2 - 1);
1050 radians = ( M_PI / snaps ) * sections;
1051 }
1052 skew[dim_a] = tan(radians) * s[dim_a];
1053 } else {
1054 SnapManager const &m = _desktop->namedview->snap_manager;
1056 std::pair<NR::Coord, bool> bb = m.freeSnapSkew(Inkscape::Snapper::BBOX_POINT,
1057 _bbox_points,
1058 std::list<SPItem const *>(),
1059 skew[dim_a],
1060 _origin,
1061 dim_a);
1063 std::pair<NR::Coord, bool> sn = m.freeSnapSkew(Inkscape::Snapper::SNAP_POINT,
1064 _snap_points,
1065 std::list<SPItem const *>(),
1066 skew[dim_a],
1067 _origin,
1068 dim_a);
1070 if (bb.second || sn.second) {
1071 /* We snapped something, so change the skew to reflect it */
1072 NR::Coord const bd = bb.second ? bb.first : NR_HUGE;
1073 NR::Coord const sd = sn.second ? sn.first : NR_HUGE;
1074 skew[dim_a] = std::min(bd, sd);
1075 }
1076 }
1078 pt[dim_b] = ( _point[dim_a] - _origin[dim_a] ) * skew[dim_a] + _point[dim_b];
1079 pt[dim_a] = ( _point[dim_a] - _origin[dim_a] ) * s[dim_a] + _origin[dim_a];
1081 /* status text */
1082 double degrees = 180 / M_PI * radians;
1083 if (degrees > 180) degrees -= 360;
1084 if (degrees < -180) degrees += 360;
1086 _message_context.setF(Inkscape::NORMAL_MESSAGE,
1087 // TRANSLATORS: don't modify the first ";"
1088 // (it will NOT be displayed as ";" - only the second one will be)
1089 _("<b>Skew</b>: %0.2f°; with <b>Ctrl</b> to snap angle"),
1090 degrees);
1092 return TRUE;
1093 }
1095 bool Inkscape::SelTrans::rotateRequest(NR::Point &pt, guint state)
1096 {
1097 int snaps = prefs_get_int_attribute("options.rotationsnapsperpi", "value", 12);
1099 // rotate affine in rotate
1100 NR::Point const d1 = _point - _origin;
1101 NR::Point const d2 = pt - _origin;
1103 NR::Coord const h1 = NR::L2(d1);
1104 if (h1 < 1e-15) return FALSE;
1105 NR::Point q1 = d1 / h1;
1106 NR::Coord const h2 = NR::L2(d2);
1107 if (fabs(h2) < 1e-15) return FALSE;
1108 NR::Point q2 = d2 / h2;
1110 double radians;
1111 if (state & GDK_CONTROL_MASK) {
1112 /* Have to restrict movement. */
1113 double cos_t = NR::dot(q1, q2);
1114 double sin_t = NR::dot(NR::rot90(q1), q2);
1115 radians = atan2(sin_t, cos_t);
1116 if (snaps) {
1117 radians = ( M_PI / snaps ) * floor( radians * snaps / M_PI + .5 );
1118 }
1119 q1 = NR::Point(1, 0);
1120 q2 = NR::Point(cos(radians), sin(radians));
1121 } else {
1122 radians = atan2(NR::dot(NR::rot90(d1), d2),
1123 NR::dot(d1, d2));
1124 }
1126 NR::rotate const r1(q1);
1127 NR::rotate const r2(q2);
1128 pt = _point * NR::translate(-_origin) * ( r2 / r1 ) * NR::translate(_origin);
1130 /* status text */
1131 double degrees = 180 / M_PI * radians;
1132 if (degrees > 180) degrees -= 360;
1133 if (degrees < -180) degrees += 360;
1135 _message_context.setF(Inkscape::NORMAL_MESSAGE,
1136 // TRANSLATORS: don't modify the first ";"
1137 // (it will NOT be displayed as ";" - only the second one will be)
1138 _("<b>Rotate</b>: %0.2f°; with <b>Ctrl</b> to snap angle"), degrees);
1140 return TRUE;
1141 }
1143 bool Inkscape::SelTrans::centerRequest(NR::Point &pt, guint state)
1144 {
1145 using NR::X;
1146 using NR::Y;
1148 SnapManager const &m = _desktop->namedview->snap_manager;
1149 pt = m.freeSnap(Snapper::SNAP_POINT, pt, NULL).getPoint();
1151 if (state & GDK_CONTROL_MASK) {
1152 if ( fabs(_point[X] - pt[X]) > fabs(_point[Y] - pt[Y]) ) {
1153 pt[Y] = _point[Y];
1154 } else {
1155 pt[X] = _point[X];
1156 }
1157 }
1159 if (!(state & GDK_SHIFT_MASK)) {
1160 // screen pixels to snap center to bbox
1161 #define SNAP_DIST 5
1162 // FIXME: take from prefs
1163 double snap_dist = SNAP_DIST / _desktop->current_zoom();
1165 for (int i = 0; i < 2; i++) {
1167 if (fabs(pt[i] - _box.min()[i]) < snap_dist) {
1168 pt[i] = _box.min()[i];
1169 }
1170 if (fabs(pt[i] - _box.midpoint()[i]) < snap_dist) {
1171 pt[i] = _box.midpoint()[i];
1172 }
1173 if (fabs(pt[i] - _box.max()[i]) < snap_dist) {
1174 pt[i] = _box.max()[i];
1175 }
1176 }
1177 }
1179 // status text
1180 GString *xs = SP_PX_TO_METRIC_STRING(pt[X], _desktop->namedview->getDefaultMetric());
1181 GString *ys = SP_PX_TO_METRIC_STRING(pt[Y], _desktop->namedview->getDefaultMetric());
1182 _message_context.setF(Inkscape::NORMAL_MESSAGE, _("Move <b>center</b> to %s, %s"), xs->str, ys->str);
1183 g_string_free(xs, FALSE);
1184 g_string_free(ys, FALSE);
1186 return TRUE;
1187 }
1189 /*
1190 * handlers for handle movement
1191 *
1192 */
1194 void sp_sel_trans_stretch(Inkscape::SelTrans *seltrans, SPSelTransHandle const &handle, NR::Point &pt, guint state)
1195 {
1196 seltrans->stretch(handle, pt, state);
1197 }
1199 void sp_sel_trans_scale(Inkscape::SelTrans *seltrans, SPSelTransHandle const &, NR::Point &pt, guint state)
1200 {
1201 seltrans->scale(pt, state);
1202 }
1204 void sp_sel_trans_skew(Inkscape::SelTrans *seltrans, SPSelTransHandle const &handle, NR::Point &pt, guint state)
1205 {
1206 seltrans->skew(handle, pt, state);
1207 }
1209 void sp_sel_trans_rotate(Inkscape::SelTrans *seltrans, SPSelTransHandle const &, NR::Point &pt, guint state)
1210 {
1211 seltrans->rotate(pt, state);
1212 }
1214 void Inkscape::SelTrans::stretch(SPSelTransHandle const &handle, NR::Point &pt, guint state)
1215 {
1216 using NR::X;
1217 using NR::Y;
1219 NR::Dim2 dim;
1220 switch (handle.cursor) {
1221 case GDK_LEFT_SIDE:
1222 case GDK_RIGHT_SIDE:
1223 dim = X;
1224 break;
1225 case GDK_TOP_SIDE:
1226 case GDK_BOTTOM_SIDE:
1227 dim = Y;
1228 break;
1229 default:
1230 g_assert_not_reached();
1231 abort();
1232 break;
1233 }
1235 NR::Point const scale_origin(_origin);
1236 double const offset = _point[dim] - scale_origin[dim];
1237 if (!( fabs(offset) >= 1e-15 )) {
1238 return;
1239 }
1240 NR::scale s(1, 1);
1241 s[dim] = ( pt[dim] - scale_origin[dim] ) / offset;
1242 if (isNaN(s[dim])) {
1243 g_warning("s[dim]=%g, pt[dim]=%g, scale_origin[dim]=%g, point[dim]=%g\n",
1244 s[dim], pt[dim], scale_origin[dim], _point[dim]);
1245 }
1246 if (!( fabs(s[dim]) >= 1e-15 )) {
1247 s[dim] = 1e-15;
1248 }
1249 if (state & GDK_CONTROL_MASK) {
1250 /* Preserve aspect ratio, but never flip in the dimension not being edited. */
1251 s[!dim] = fabs(s[dim]);
1252 }
1254 NR::Point new_bbox_min = _box.min() * (NR::translate(-scale_origin) * NR::Matrix(s) * NR::translate(scale_origin));
1255 NR::Point new_bbox_max = _box.max() * (NR::translate(-scale_origin) * NR::Matrix(s) * NR::translate(scale_origin));
1257 int transform_stroke = prefs_get_int_attribute ("options.transform", "stroke", 1);
1258 NR::Matrix scaler = get_scale_transform_with_stroke (_box, _strokewidth, transform_stroke,
1259 new_bbox_min[NR::X], new_bbox_min[NR::Y], new_bbox_max[NR::X], new_bbox_max[NR::Y]);
1261 transform(scaler, NR::Point(0, 0)); // we have already accounted for origin, so pass 0,0
1262 }
1264 void Inkscape::SelTrans::scale(NR::Point &pt, guint state)
1265 {
1266 NR::Point const offset = _point - _origin;
1268 NR::scale s (1, 1);
1269 for (int i = NR::X; i <= NR::Y; i++) {
1270 if (fabs(offset[i]) > 1e-9)
1271 s[i] = (pt[i] - _origin[i]) / offset[i];
1272 if (fabs(s[i]) < 1e-9)
1273 s[i] = 1e-9;
1274 }
1275 NR::Point new_bbox_min = _box.min() * (NR::translate(-_origin) * NR::Matrix(s) * NR::translate(_origin));
1276 NR::Point new_bbox_max = _box.max() * (NR::translate(-_origin) * NR::Matrix(s) * NR::translate(_origin));
1278 int transform_stroke = prefs_get_int_attribute ("options.transform", "stroke", 1);
1279 NR::Matrix scaler = get_scale_transform_with_stroke (_box, _strokewidth, transform_stroke,
1280 new_bbox_min[NR::X], new_bbox_min[NR::Y], new_bbox_max[NR::X], new_bbox_max[NR::Y]);
1282 transform(scaler, NR::Point(0, 0)); // we have already accounted for origin, so pass 0,0
1283 }
1285 void Inkscape::SelTrans::skew(SPSelTransHandle const &handle, NR::Point &pt, guint state)
1286 {
1287 NR::Point const offset = _point - _origin;
1289 unsigned dim;
1290 switch (handle.cursor) {
1291 case GDK_SB_H_DOUBLE_ARROW:
1292 dim = NR::Y;
1293 break;
1294 case GDK_SB_V_DOUBLE_ARROW:
1295 dim = NR::X;
1296 break;
1297 default:
1298 g_assert_not_reached();
1299 abort();
1300 break;
1301 }
1302 if (fabs(offset[dim]) < 1e-15) {
1303 return;
1304 }
1305 NR::Matrix skew = NR::identity();
1306 skew[2*dim + dim] = (pt[dim] - _origin[dim]) / offset[dim];
1307 skew[2*dim + (1-dim)] = (pt[1-dim] - _point[1-dim]) / offset[dim];
1308 skew[2*(1-dim) + (dim)] = 0;
1309 skew[2*(1-dim) + (1-dim)] = 1;
1311 for (int i = 0; i < 2; i++) {
1312 if (fabs(skew[3*i]) < 1e-15) {
1313 skew[3*i] = 1e-15;
1314 }
1315 }
1316 transform(skew, _origin);
1317 }
1319 void Inkscape::SelTrans::rotate(NR::Point &pt, guint state)
1320 {
1321 NR::Point const offset = _point - _origin;
1323 NR::Coord const h1 = NR::L2(offset);
1324 if (h1 < 1e-15) {
1325 return;
1326 }
1327 NR::Point const q1 = offset / h1;
1328 NR::Coord const h2 = NR::L2( pt - _origin );
1329 if (h2 < 1e-15) {
1330 return;
1331 }
1332 NR::Point const q2 = (pt - _origin) / h2;
1333 NR::rotate const r1(q1);
1334 NR::rotate const r2(q2);
1336 NR::Matrix rotate( r2 / r1 );
1337 transform(rotate, _origin);
1338 }
1340 void sp_sel_trans_center(Inkscape::SelTrans *seltrans, SPSelTransHandle const &, NR::Point &pt, guint state)
1341 {
1342 seltrans->setCenter(pt);
1343 }
1346 void Inkscape::SelTrans::moveTo(NR::Point const &xy, guint state)
1347 {
1348 SnapManager const &m = _desktop->namedview->snap_manager;
1350 /* The amount that we've moved by during this drag */
1351 NR::Point dxy = xy - _point;
1353 /* Get a STL list of the selected items.
1354 ** FIXME: this should probably be done by Inkscape::Selection.
1355 */
1356 std::list<SPItem const*> it;
1357 for (GSList const *i = _selection->itemList(); i != NULL; i = i->next) {
1358 it.push_back(reinterpret_cast<SPItem*>(i->data));
1359 }
1361 bool const alt = (state & GDK_MOD1_MASK);
1362 bool const control = (state & GDK_CONTROL_MASK);
1363 bool const shift = (state & GDK_SHIFT_MASK);
1365 if (alt) {
1367 /* Alt pressed means keep offset: snap the moved distance to the grid.
1368 ** FIXME: this will snap to more than just the grid, nowadays.
1369 */
1371 dxy = m.freeSnap(Snapper::SNAP_POINT, dxy, NULL).getPoint();
1373 } else if (!shift) {
1375 /* We're snapping to things, possibly with a constraint to horizontal or
1376 ** vertical movement. Obtain a list of possible translations and then
1377 ** pick the smallest.
1378 */
1380 /* This will be our list of possible translations */
1381 std::list<std::pair<NR::Point, bool> > s;
1383 if (control) {
1385 /* Snap to things, and also constrain to horizontal or vertical movement */
1387 for (unsigned int dim = 0; dim < 2; dim++) {
1388 s.push_back(m.constrainedSnapTranslation(Inkscape::Snapper::BBOX_POINT,
1389 _bbox_points,
1390 it,
1391 Inkscape::Snapper::ConstraintLine(component_vectors[dim]),
1392 dxy));
1394 s.push_back(m.constrainedSnapTranslation(Inkscape::Snapper::SNAP_POINT,
1395 _snap_points,
1396 it,
1397 Inkscape::Snapper::ConstraintLine(component_vectors[dim]),
1398 dxy));
1399 }
1401 } else {
1403 /* Snap to things with no constraint */
1405 s.push_back(m.freeSnapTranslation(Inkscape::Snapper::BBOX_POINT,
1406 _bbox_points, it, dxy));
1407 s.push_back(m.freeSnapTranslation(Inkscape::Snapper::SNAP_POINT,
1408 _snap_points, it, dxy));
1409 }
1411 /* Pick one */
1412 NR::Coord best = NR_HUGE;
1413 for (std::list<std::pair<NR::Point, bool> >::const_iterator i = s.begin(); i != s.end(); i++) {
1414 if (i->second) {
1415 NR::Coord const m = NR::L2(i->first);
1416 if (m < best) {
1417 best = m;
1418 dxy = i->first;
1419 }
1420 }
1421 }
1422 }
1424 if (control) {
1425 /* Ensure that the horizontal and vertical constraint has been applied */
1426 if (fabs(dxy[NR::X]) > fabs(dxy[NR::Y])) {
1427 dxy[NR::Y] = 0;
1428 } else {
1429 dxy[NR::X] = 0;
1430 }
1431 }
1433 NR::Matrix const move((NR::translate(dxy)));
1434 NR::Point const norm(0, 0);
1435 transform(move, norm);
1437 // status text
1438 GString *xs = SP_PX_TO_METRIC_STRING(dxy[NR::X], _desktop->namedview->getDefaultMetric());
1439 GString *ys = SP_PX_TO_METRIC_STRING(dxy[NR::Y], _desktop->namedview->getDefaultMetric());
1440 _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);
1441 g_string_free(xs, TRUE);
1442 g_string_free(ys, TRUE);
1443 }
1446 /*
1447 Local Variables:
1448 mode:c++
1449 c-file-style:"stroustrup"
1450 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
1451 indent-tabs-mode:nil
1452 fill-column:99
1453 End:
1454 */
1455 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4 :