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();
104 _current.set_identity();
106 _center_is_set = false; // reread _center from items, or set to bbox midpoint
108 _updateHandles();
110 _selection = sp_desktop_selection(desktop);
112 _norm = sp_canvas_item_new(sp_desktop_controls(desktop),
113 SP_TYPE_CTRL,
114 "anchor", GTK_ANCHOR_CENTER,
115 "mode", SP_CTRL_MODE_COLOR,
116 "shape", SP_CTRL_SHAPE_BITMAP,
117 "size", 13.0,
118 "filled", TRUE,
119 "fill_color", 0x00000000,
120 "stroked", TRUE,
121 "stroke_color", 0x000000a0,
122 "pixbuf", handles[12],
123 NULL);
125 _grip = sp_canvas_item_new(sp_desktop_controls(desktop),
126 SP_TYPE_CTRL,
127 "anchor", GTK_ANCHOR_CENTER,
128 "mode", SP_CTRL_MODE_XOR,
129 "shape", SP_CTRL_SHAPE_CROSS,
130 "size", 7.0,
131 "filled", TRUE,
132 "fill_color", 0xffffff7f,
133 "stroked", TRUE,
134 "stroke_color", 0xffffffff,
135 "pixbuf", handles[12],
136 NULL);
138 sp_canvas_item_hide(_grip);
139 sp_canvas_item_hide(_norm);
141 for (int i = 0; i < 4; i++) {
142 _l[i] = sp_canvas_item_new(sp_desktop_controls(desktop), SP_TYPE_CTRLLINE, NULL);
143 sp_canvas_item_hide(_l[i]);
144 }
146 _sel_changed_connection = _selection->connectChanged(
147 sigc::mem_fun(*this, &Inkscape::SelTrans::_selChanged)
148 );
150 _sel_modified_connection = _selection->connectModified(
151 sigc::mem_fun(*this, &Inkscape::SelTrans::_selModified)
152 );
153 }
155 Inkscape::SelTrans::~SelTrans()
156 {
157 _sel_changed_connection.disconnect();
158 _sel_modified_connection.disconnect();
160 for (unsigned int i = 0; i < 8; i++) {
161 if (_shandle[i]) {
162 g_object_unref(G_OBJECT(_shandle[i]));
163 _shandle[i] = NULL;
164 }
165 if (_rhandle[i]) {
166 g_object_unref(G_OBJECT(_rhandle[i]));
167 _rhandle[i] = NULL;
168 }
169 }
170 if (_chandle) {
171 g_object_unref(G_OBJECT(_chandle));
172 _chandle = NULL;
173 }
175 if (_norm) {
176 gtk_object_destroy(GTK_OBJECT(_norm));
177 _norm = NULL;
178 }
179 if (_grip) {
180 gtk_object_destroy(GTK_OBJECT(_grip));
181 _grip = NULL;
182 }
183 for (int i = 0; i < 4; i++) {
184 if (_l[i]) {
185 gtk_object_destroy(GTK_OBJECT(_l[i]));
186 _l[i] = NULL;
187 }
188 }
190 for (unsigned i = 0; i < _items.size(); i++) {
191 sp_object_unref(SP_OBJECT(_items[i].first), NULL);
192 }
194 _items.clear();
195 _items_centers.clear();
196 }
198 void Inkscape::SelTrans::resetState()
199 {
200 _state = STATE_SCALE;
201 }
203 void Inkscape::SelTrans::increaseState()
204 {
205 if (_state == STATE_SCALE) {
206 _state = STATE_ROTATE;
207 } else {
208 _state = STATE_SCALE;
209 }
211 _center_is_set = true; // no need to reread center
213 _updateHandles();
214 }
216 void Inkscape::SelTrans::setCenter(NR::Point const &p)
217 {
218 _center = p;
219 _center_is_set = true;
221 // Write the new center position into all selected items
222 for (GSList const *l = _desktop->selection->itemList(); l; l = l->next) {
223 SPItem *it = (SPItem*)sp_object_ref(SP_OBJECT(l->data), NULL);
224 it->setCenter(p);
225 SP_OBJECT(it)->updateRepr();
226 }
227 sp_document_maybe_done (sp_desktop_document(_desktop), "center::move", SP_VERB_CONTEXT_SELECT,
228 _("Set center"));
230 _updateHandles();
231 }
233 void Inkscape::SelTrans::grab(NR::Point const &p, gdouble x, gdouble y, bool show_handles)
234 {
235 Inkscape::Selection *selection = sp_desktop_selection(_desktop);
237 g_return_if_fail(!_grabbed);
239 _grabbed = true;
240 _show_handles = show_handles;
241 _updateVolatileState();
242 _current.set_identity();
244 _changed = false;
246 if (_empty) {
247 return;
248 }
250 for (GSList const *l = selection->itemList(); l; l = l->next) {
251 SPItem *it = (SPItem*)sp_object_ref(SP_OBJECT(l->data), NULL);
252 _items.push_back(std::pair<SPItem *, NR::Matrix>(it, sp_item_i2d_affine(it)));
253 _items_centers.push_back(std::pair<SPItem *, NR::Point>(it, it->getCenter())); // for content-dragging, we need to remember original centers
254 }
256 _current.set_identity();
258 _point = p;
260 _snap_points = selection->getSnapPointsConvexHull();
261 _bbox_points = selection->getBBoxPointsOuter();
262 _bbox_4points = _bbox_points;
263 _bbox_4points.push_back(NR::Point(_bbox_points[0][NR::X], _bbox_points[1][NR::Y]));
264 _bbox_4points.push_back(NR::Point(_bbox_points[1][NR::X], _bbox_points[0][NR::Y]));
266 gchar const *scale_origin = prefs_get_string_attribute("tools.select", "scale_origin");
267 bool const origin_on_bbox = (scale_origin == NULL || !strcmp(scale_origin, "bbox"));
268 NR::Rect op_box = _box;
269 if (origin_on_bbox == false && _snap_points.empty() == false) {
270 std::vector<NR::Point>::iterator i = _snap_points.begin();
271 op_box = NR::Rect(*i, *i);
272 i++;
273 while (i != _snap_points.end()) {
274 op_box.expandTo(*i);
275 i++;
276 }
277 }
279 _opposite = ( op_box.min() + ( op_box.dimensions() * NR::scale(1-x, 1-y) ) );
281 if ((x != -1) && (y != -1)) {
282 sp_canvas_item_show(_norm);
283 sp_canvas_item_show(_grip);
284 }
286 if (_show == SHOW_OUTLINE) {
287 for (int i = 0; i < 4; i++)
288 sp_canvas_item_show(_l[i]);
289 }
292 _updateHandles();
293 g_return_if_fail(_stamp_cache == NULL);
294 }
296 void Inkscape::SelTrans::transform(NR::Matrix const &rel_affine, NR::Point const &norm)
297 {
298 g_return_if_fail(_grabbed);
299 g_return_if_fail(!_empty);
301 NR::Matrix const affine( NR::translate(-norm) * rel_affine * NR::translate(norm) );
303 if (_show == SHOW_CONTENT) {
304 // update the content
305 for (unsigned i = 0; i < _items.size(); i++) {
306 SPItem &item = *_items[i].first;
307 NR::Matrix const &prev_transform = _items[i].second;
308 sp_item_set_i2d_affine(&item, prev_transform * affine);
309 }
310 } else {
311 NR::Point p[4];
312 /* update the outline */
313 for (unsigned i = 0 ; i < 4 ; i++) {
314 p[i] = _box.corner(i) * affine;
315 }
316 for (unsigned i = 0 ; i < 4 ; i++) {
317 sp_ctrlline_set_coords(SP_CTRLLINE(_l[i]), p[i], p[(i+1)%4]);
318 }
319 }
321 _current = affine;
322 _changed = true;
323 _updateHandles();
324 }
326 void Inkscape::SelTrans::ungrab()
327 {
328 g_return_if_fail(_grabbed);
329 _grabbed = false;
330 _show_handles = true;
332 Inkscape::Selection *selection = sp_desktop_selection(_desktop);
333 _updateVolatileState();
335 for (unsigned i = 0; i < _items.size(); i++) {
336 sp_object_unref(SP_OBJECT(_items[i].first), NULL);
337 }
339 sp_canvas_item_hide(_norm);
340 sp_canvas_item_hide(_grip);
342 if (_show == SHOW_OUTLINE) {
343 for (int i = 0; i < 4; i++)
344 sp_canvas_item_hide(_l[i]);
345 }
347 if (_stamp_cache) {
348 g_slist_free(_stamp_cache);
349 _stamp_cache = NULL;
350 }
352 _message_context.clear();
354 if (!_empty && _changed) {
355 sp_selection_apply_affine(selection, _current, (_show == SHOW_OUTLINE)? true : false);
356 _center *= _current;
357 _center_is_set = true;
359 // If dragging showed content live, sp_selection_apply_affine cannot change the centers
360 // appropriately - it does not know the original positions of the centers (all objects already have
361 // the new bboxes). So we need to reset the centers from our saved array.
362 if (_show != SHOW_OUTLINE && !_current.is_translation()) {
363 for (unsigned i = 0; i < _items_centers.size(); i++) {
364 SPItem *currentItem = _items_centers[i].first;
365 if (currentItem->isCenterSet()) { // only if it's already set
366 currentItem->setCenter (_items_centers[i].second * _current);
367 SP_OBJECT(currentItem)->updateRepr();
368 }
369 }
370 }
372 _items.clear();
373 _items_centers.clear();
375 if (_current.is_translation()) {
376 sp_document_done(sp_desktop_document(_desktop), SP_VERB_CONTEXT_SELECT,
377 _("Move"));
378 } else if (_current.is_scale()) {
379 sp_document_done(sp_desktop_document(_desktop), SP_VERB_CONTEXT_SELECT,
380 _("Scale"));
381 } else if (_current.is_rotation()) {
382 sp_document_done(sp_desktop_document(_desktop), SP_VERB_CONTEXT_SELECT,
383 _("Rotate"));
384 } else {
385 sp_document_done(sp_desktop_document(_desktop), SP_VERB_CONTEXT_SELECT,
386 _("Skew"));
387 }
389 } else {
390 _items.clear();
391 _items_centers.clear();
392 _updateHandles();
393 }
394 }
396 /* fixme: This is really bad, as we compare positions for each stamp (Lauris) */
397 /* fixme: IMHO the best way to keep sort cache would be to implement timestamping at last */
399 void Inkscape::SelTrans::stamp()
400 {
401 Inkscape::Selection *selection = sp_desktop_selection(_desktop);
403 bool fixup = !_grabbed;
404 if ( fixup && _stamp_cache ) {
405 // TODO - give a proper fix. Simple temproary work-around for the grab() issue
406 g_slist_free(_stamp_cache);
407 _stamp_cache = NULL;
408 }
410 /* stamping mode */
411 if (!_empty) {
412 GSList *l;
413 if (_stamp_cache) {
414 l = _stamp_cache;
415 } else {
416 /* Build cache */
417 l = g_slist_copy((GSList *) selection->itemList());
418 l = g_slist_sort(l, (GCompareFunc) sp_object_compare_position);
419 _stamp_cache = l;
420 }
422 while (l) {
423 SPItem *original_item = SP_ITEM(l->data);
424 Inkscape::XML::Node *original_repr = SP_OBJECT_REPR(original_item);
426 // remember the position of the item
427 gint pos = original_repr->position();
428 // remember parent
429 Inkscape::XML::Node *parent = sp_repr_parent(original_repr);
431 Inkscape::XML::Node *copy_repr = original_repr->duplicate();
433 // add the new repr to the parent
434 parent->appendChild(copy_repr);
435 // move to the saved position
436 copy_repr->setPosition(pos > 0 ? pos : 0);
438 SPItem *copy_item = (SPItem *) sp_desktop_document(_desktop)->getObjectByRepr(copy_repr);
440 NR::Matrix const *new_affine;
441 if (_show == SHOW_OUTLINE) {
442 NR::Matrix const i2d(sp_item_i2d_affine(original_item));
443 NR::Matrix const i2dnew( i2d * _current );
444 sp_item_set_i2d_affine(copy_item, i2dnew);
445 new_affine = ©_item->transform;
446 } else {
447 new_affine = &original_item->transform;
448 }
450 sp_item_write_transform(copy_item, copy_repr, *new_affine);
452 if (copy_item->isCenterSet()) {
453 copy_item->setCenter(_center * _current);
454 }
456 Inkscape::GC::release(copy_repr);
457 l = l->next;
458 }
459 sp_document_done(sp_desktop_document(_desktop), SP_VERB_CONTEXT_SELECT,
460 _("Stamp"));
461 }
463 if ( fixup && _stamp_cache ) {
464 // TODO - give a proper fix. Simple temproary work-around for the grab() issue
465 g_slist_free(_stamp_cache);
466 _stamp_cache = NULL;
467 }
468 }
470 void Inkscape::SelTrans::_updateHandles()
471 {
472 if ( !_show_handles || _empty )
473 {
474 sp_remove_handles(_shandle, 8);
475 sp_remove_handles(_rhandle, 8);
476 sp_remove_handles(&_chandle, 1);
477 return;
478 }
480 // center handle
481 if ( _chandle == NULL ) {
482 _chandle = sp_knot_new(_desktop, _("<b>Center</b> of rotation and skewing: drag to reposition; scaling with Shift also uses this center"));
484 _chandle->setShape (SP_CTRL_SHAPE_BITMAP);
485 _chandle->setSize (13);
486 _chandle->setAnchor (handle_center.anchor);
487 _chandle->setMode (SP_CTRL_MODE_XOR);
488 _chandle->setFill(0x00000000, 0x00000000, 0x00000000);
489 _chandle->setStroke(0x000000ff, 0xff0000b0, 0xff0000b0);
490 _chandle->setPixbuf(handles[handle_center.control]);
491 sp_knot_update_ctrl(_chandle);
493 g_signal_connect(G_OBJECT(_chandle), "request",
494 G_CALLBACK(sp_sel_trans_handle_request), (gpointer) &handle_center);
495 g_signal_connect(G_OBJECT(_chandle), "moved",
496 G_CALLBACK(sp_sel_trans_handle_new_event), (gpointer) &handle_center);
497 g_signal_connect(G_OBJECT(_chandle), "grabbed",
498 G_CALLBACK(sp_sel_trans_handle_grab), (gpointer) &handle_center);
499 g_signal_connect(G_OBJECT(_chandle), "ungrabbed",
500 G_CALLBACK(sp_sel_trans_handle_ungrab), (gpointer) &handle_center);
501 g_signal_connect(G_OBJECT(_chandle), "clicked",
502 G_CALLBACK(sp_sel_trans_handle_click), (gpointer) &handle_center);
503 }
505 sp_remove_handles(&_chandle, 1);
506 if ( _state == STATE_SCALE ) {
507 sp_remove_handles(_rhandle, 8);
508 _showHandles(_shandle, handles_scale, 8,
509 _("<b>Squeeze or stretch</b> selection; with <b>Ctrl</b> to scale uniformly; with <b>Shift</b> to scale around rotation center"),
510 _("<b>Scale</b> selection; with <b>Ctrl</b> to scale uniformly; with <b>Shift</b> to scale around rotation center"));
511 } else {
512 sp_remove_handles(_shandle, 8);
513 _showHandles(_rhandle, handles_rotate, 8,
514 _("<b>Skew</b> selection; with <b>Ctrl</b> to snap angle; with <b>Shift</b> to skew around the opposite side"),
515 _("<b>Rotate</b> selection; with <b>Ctrl</b> to snap angle; with <b>Shift</b> to rotate around the opposite corner"));
516 }
518 if (!_center_is_set) {
519 _center = _desktop->selection->center();
520 _center_is_set = true;
521 }
523 if ( _state == STATE_SCALE ) {
524 sp_knot_hide(_chandle);
525 } else {
526 sp_knot_show(_chandle);
527 sp_knot_moveto(_chandle, &_center);
528 }
529 }
531 void Inkscape::SelTrans::_updateVolatileState()
532 {
533 Inkscape::Selection *selection = sp_desktop_selection(_desktop);
534 _empty = selection->isEmpty();
536 if (_empty) {
537 return;
538 }
540 _box = selection->bounds();
541 if (_box.isEmpty()) {
542 _empty = true;
543 return;
544 }
546 _strokewidth = stroke_average_width (selection->itemList());
547 }
549 static void sp_remove_handles(SPKnot *knot[], gint num)
550 {
551 for (int i = 0; i < num; i++) {
552 if (knot[i] != NULL) {
553 sp_knot_hide(knot[i]);
554 }
555 }
556 }
558 void Inkscape::SelTrans::_showHandles(SPKnot *knot[], SPSelTransHandle const handle[], gint num,
559 gchar const *even_tip, gchar const *odd_tip)
560 {
561 g_return_if_fail( !_empty );
563 for (int i = 0; i < num; i++) {
564 if (knot[i] == NULL) {
565 knot[i] = sp_knot_new(_desktop, i % 2 ? even_tip : odd_tip);
567 knot[i]->setShape (SP_CTRL_SHAPE_BITMAP);
568 knot[i]->setSize (13);
569 knot[i]->setAnchor (handle[i].anchor);
570 knot[i]->setMode (SP_CTRL_MODE_XOR);
571 knot[i]->setFill(0x000000ff, 0x00ff6600, 0x00ff6600); // inversion, green, green
572 knot[i]->setStroke(0x000000ff, 0x000000ff, 0x000000ff); // inversion
573 knot[i]->setPixbuf(handles[handle[i].control]);
574 sp_knot_update_ctrl(knot[i]);
576 g_signal_connect(G_OBJECT(knot[i]), "request",
577 G_CALLBACK(sp_sel_trans_handle_request), (gpointer) &handle[i]);
578 g_signal_connect(G_OBJECT(knot[i]), "moved",
579 G_CALLBACK(sp_sel_trans_handle_new_event), (gpointer) &handle[i]);
580 g_signal_connect(G_OBJECT(knot[i]), "grabbed",
581 G_CALLBACK(sp_sel_trans_handle_grab), (gpointer) &handle[i]);
582 g_signal_connect(G_OBJECT(knot[i]), "ungrabbed",
583 G_CALLBACK(sp_sel_trans_handle_ungrab), (gpointer) &handle[i]);
584 g_signal_connect(G_OBJECT(knot[i]), "event", G_CALLBACK(sp_seltrans_handle_event), (gpointer) &handle[i]);
585 }
586 sp_knot_show(knot[i]);
588 NR::Point const handle_pt(handle[i].x, handle[i].y);
589 NR::Point p( _box.min()
590 + ( _box.dimensions()
591 * NR::scale(handle_pt) ) );
593 sp_knot_moveto(knot[i], &p);
594 }
595 }
597 static void sp_sel_trans_handle_grab(SPKnot *knot, guint state, gpointer data)
598 {
599 SP_SELECT_CONTEXT(knot->desktop->event_context)->_seltrans->handleGrab(
600 knot, state, *(SPSelTransHandle const *) data
601 );
602 }
604 static void sp_sel_trans_handle_ungrab(SPKnot *knot, guint state, gpointer data)
605 {
606 SP_SELECT_CONTEXT(knot->desktop->event_context)->_seltrans->ungrab();
607 }
609 static void sp_sel_trans_handle_new_event(SPKnot *knot, NR::Point *position, guint state, gpointer data)
610 {
611 SP_SELECT_CONTEXT(knot->desktop->event_context)->_seltrans->handleNewEvent(
612 knot, position, state, *(SPSelTransHandle const *) data
613 );
614 }
616 static gboolean sp_sel_trans_handle_request(SPKnot *knot, NR::Point *position, guint state, gboolean *data)
617 {
618 return SP_SELECT_CONTEXT(knot->desktop->event_context)->_seltrans->handleRequest(
619 knot, position, state, *(SPSelTransHandle const *) data
620 );
621 }
623 static void sp_sel_trans_handle_click(SPKnot *knot, guint state, gpointer data)
624 {
625 SP_SELECT_CONTEXT(knot->desktop->event_context)->_seltrans->handleClick(
626 knot, state, *(SPSelTransHandle const *) data
627 );
628 }
630 void Inkscape::SelTrans::handleClick(SPKnot *knot, guint state, SPSelTransHandle const &handle)
631 {
632 switch (handle.anchor) {
633 case GTK_ANCHOR_CENTER:
634 if (state & GDK_SHIFT_MASK) {
635 // Unset the center position for all selected items
636 for (GSList const *l = _desktop->selection->itemList(); l; l = l->next) {
637 SPItem *it = (SPItem*)sp_object_ref(SP_OBJECT(l->data), NULL);
638 it->unsetCenter();
639 SP_OBJECT(it)->updateRepr();
640 _center_is_set = false; // center has changed
641 _updateHandles();
642 }
643 sp_document_maybe_done (sp_desktop_document(_desktop), "center::unset", SP_VERB_CONTEXT_SELECT,
644 _("Reset center"));
645 }
646 break;
647 default:
648 break;
649 }
650 }
652 void Inkscape::SelTrans::handleGrab(SPKnot *knot, guint state, SPSelTransHandle const &handle)
653 {
654 switch (handle.anchor) {
655 case GTK_ANCHOR_CENTER:
656 g_object_set(G_OBJECT(_grip),
657 "shape", SP_CTRL_SHAPE_BITMAP,
658 "size", 13.0,
659 NULL);
660 sp_canvas_item_show(_grip);
661 break;
662 default:
663 g_object_set(G_OBJECT(_grip),
664 "shape", SP_CTRL_SHAPE_CROSS,
665 "size", 7.0,
666 NULL);
667 sp_canvas_item_show(_norm);
668 sp_canvas_item_show(_grip);
670 break;
671 }
673 grab(sp_knot_position(knot), handle.x, handle.y, FALSE);
674 }
677 void Inkscape::SelTrans::handleNewEvent(SPKnot *knot, NR::Point *position, guint state, SPSelTransHandle const &handle)
678 {
679 if (!SP_KNOT_IS_GRABBED(knot)) {
680 return;
681 }
683 // in case items have been unhooked from the document, don't
684 // try to continue processing events for them.
685 for (unsigned int i = 0; i < _items.size(); i++) {
686 if (!SP_OBJECT_DOCUMENT(SP_OBJECT(_items[i].first)) ) {
687 return;
688 }
689 }
691 handle.action(this, handle, *position, state);
692 }
695 gboolean Inkscape::SelTrans::handleRequest(SPKnot *knot, NR::Point *position, guint state, SPSelTransHandle const &handle)
696 {
697 if (!SP_KNOT_IS_GRABBED(knot)) {
698 return TRUE;
699 }
701 knot->desktop->set_coordinate_status(*position);
702 knot->desktop->setPosition(*position);
705 if (state & GDK_MOD1_MASK) {
706 *position = _point + ( *position - _point ) / 10;
707 }
709 if (!(state & GDK_SHIFT_MASK) == !(_state == STATE_ROTATE)) {
710 _origin = _opposite;
711 } else {
712 _origin = _center;
713 }
714 if (handle.request(this, handle, *position, state)) {
715 sp_knot_set_position(knot, position, state);
716 SP_CTRL(_grip)->moveto(*position);
717 SP_CTRL(_norm)->moveto(_origin);
718 }
720 return TRUE;
721 }
724 void Inkscape::SelTrans::_selChanged(Inkscape::Selection *selection)
725 {
726 if (!_grabbed) {
727 _updateVolatileState();
728 _current.set_identity();
729 _center_is_set = false; // center(s) may have changed
730 _updateHandles();
731 }
732 }
734 void Inkscape::SelTrans::_selModified(Inkscape::Selection *selection, guint flags)
735 {
736 if (!_grabbed) {
737 _updateVolatileState();
738 _current.set_identity();
740 // reset internal flag
741 _changed = false;
743 _center_is_set = false; // center(s) may have changed
745 _updateHandles();
746 }
747 }
749 /*
750 * handlers for handle move-request
751 */
753 /** Returns -1 or 1 according to the sign of x. Returns 1 for 0 and NaN. */
754 static double sign(double const x)
755 {
756 return ( x < 0
757 ? -1
758 : 1 );
759 }
761 gboolean sp_sel_trans_scale_request(Inkscape::SelTrans *seltrans,
762 SPSelTransHandle const &, NR::Point &pt, guint state)
763 {
764 return seltrans->scaleRequest(pt, state);
765 }
767 gboolean sp_sel_trans_stretch_request(Inkscape::SelTrans *seltrans,
768 SPSelTransHandle const &handle, NR::Point &pt, guint state)
769 {
770 return seltrans->stretchRequest(handle, pt, state);
771 }
773 gboolean sp_sel_trans_skew_request(Inkscape::SelTrans *seltrans,
774 SPSelTransHandle const &handle, NR::Point &pt, guint state)
775 {
776 return seltrans->skewRequest(handle, pt, state);
777 }
779 gboolean sp_sel_trans_rotate_request(Inkscape::SelTrans *seltrans,
780 SPSelTransHandle const &, NR::Point &pt, guint state)
781 {
782 return seltrans->rotateRequest(pt, state);
783 }
785 gboolean sp_sel_trans_center_request(Inkscape::SelTrans *seltrans,
786 SPSelTransHandle const &, NR::Point &pt, guint state)
787 {
788 return seltrans->centerRequest(pt, state);
789 }
791 gboolean Inkscape::SelTrans::scaleRequest(NR::Point &pt, guint state)
792 {
793 using NR::X;
794 using NR::Y;
796 NR::Point d = _point - _origin;
797 NR::scale s(0, 0);
799 /* Work out the new scale factors `s' */
800 for ( unsigned int i = 0 ; i < 2 ; i++ ) {
801 if ( fabs(d[i]) > 0.001 ) {
802 s[i] = ( pt[i] - _origin[i] ) / d[i];
803 if ( fabs(s[i]) < 1e-9 ) {
804 s[i] = 1e-9;
805 }
806 }
807 }
809 SnapManager const &m = _desktop->namedview->snap_manager;
811 /* Get a STL list of the selected items.
812 ** FIXME: this should probably be done by Inkscape::Selection.
813 */
814 std::list<SPItem const*> it;
815 for (GSList const *i = _selection->itemList(); i != NULL; i = i->next) {
816 it.push_back(reinterpret_cast<SPItem*>(i->data));
817 }
819 if ((state & GDK_CONTROL_MASK) || _desktop->isToolboxButtonActive ("lock")) {
820 /* Scale is locked to a 1:1 aspect ratio, so that s[X] must be made to equal s[Y].
821 ** To do this, we snap along a suitable constraint vector from the origin.
822 */
824 NR::Point const cv = NR::Point(
825 pt[NR::X] > _origin[NR::X] ? 1 : -1,
826 pt[NR::Y] > _origin[NR::Y] ? 1 : -1
827 );
829 std::pair<NR::scale, bool> bb = m.constrainedSnapScale(Snapper::BBOX_POINT,
830 _bbox_points,
831 it,
832 Snapper::ConstraintLine(_origin, cv),
833 s,
834 _origin);
836 std::pair<NR::scale, bool> sn = m.constrainedSnapScale(Snapper::SNAP_POINT,
837 _snap_points,
838 it,
839 Snapper::ConstraintLine(_origin, cv),
840 s,
841 _origin);
843 if (bb.second == false && sn.second == false) {
845 /* We didn't snap, so just lock aspect ratio */
846 if (fabs(s[NR::X]) > fabs(s[NR::Y])) {
847 s[NR::X] = fabs(s[NR::Y]) * sign(s[NR::X]);
848 } else {
849 s[NR::Y] = fabs(s[NR::X]) * sign(s[NR::Y]);
850 }
852 } else {
854 /* Choose the smaller difference in scale. Since s[X] == s[Y] we can
855 ** just compare difference in s[X].
856 */
857 double const bd = bb.second ? fabs(bb.first[NR::X] - s[NR::X]) : NR_HUGE;
858 double const sd = sn.second ? fabs(sn.first[NR::X] - s[NR::X]) : NR_HUGE;
859 s = (bd < sd) ? bb.first : sn.first;
860 }
862 } else {
863 /* Scale aspect ratio is unlocked */
865 std::pair<NR::scale, bool> bb = m.freeSnapScale(Snapper::BBOX_POINT,
866 _bbox_4points,
867 it,
868 s,
869 _origin);
870 std::pair<NR::scale, bool> sn = m.freeSnapScale(Snapper::SNAP_POINT,
871 _snap_points,
872 it,
873 s,
874 _origin);
876 /* Pick the snap that puts us closest to the original scale */
877 NR::Coord bd = bb.second ?
878 fabs(NR::L2(NR::Point(bb.first[NR::X], bb.first[NR::Y])) -
879 NR::L2(NR::Point(s[NR::X], s[NR::Y])))
880 : NR_HUGE;
881 NR::Coord sd = sn.second ?
882 fabs(NR::L2(NR::Point(sn.first[NR::X], sn.first[NR::Y])) -
883 NR::L2(NR::Point(s[NR::X], s[NR::Y])))
884 : NR_HUGE;
885 s = (bd < sd) ? bb.first : sn.first;
886 }
888 /* Update the knot position */
889 pt = ( _point - _origin ) * s + _origin;
891 /* Status text */
892 _message_context.setF(Inkscape::NORMAL_MESSAGE,
893 _("<b>Scale</b>: %0.2f%% x %0.2f%%; with <b>Ctrl</b> to lock ratio"),
894 100 * s[NR::X], 100 * s[NR::Y]);
896 return TRUE;
897 }
899 gboolean Inkscape::SelTrans::stretchRequest(SPSelTransHandle const &handle, NR::Point &pt, guint state)
900 {
901 using NR::X;
902 using NR::Y;
904 NR::Dim2 axis, perp;
906 switch (handle.cursor) {
907 case GDK_TOP_SIDE:
908 case GDK_BOTTOM_SIDE:
909 axis = NR::Y;
910 perp = NR::X;
911 break;
912 case GDK_LEFT_SIDE:
913 case GDK_RIGHT_SIDE:
914 axis = NR::X;
915 perp = NR::Y;
916 break;
917 default:
918 g_assert_not_reached();
919 return TRUE;
920 };
922 if ( fabs( _point[axis] - _origin[axis] ) < 1e-15 ) {
923 return FALSE;
924 }
926 NR::scale s(1, 1);
927 s[axis] = ( ( pt[axis] - _origin[axis] )
928 / ( _point[axis] - _origin[axis] ) );
929 if ( fabs(s[axis]) < 1e-15 ) {
930 s[axis] = 1e-15;
931 }
933 /* Get a STL list of the selected items.
934 ** FIXME: this should probably be done by Inkscape::Selection.
935 */
936 std::list<SPItem const*> it;
937 for (GSList const *i = _selection->itemList(); i != NULL; i = i->next) {
938 it.push_back(reinterpret_cast<SPItem*>(i->data));
939 }
941 SnapManager const &m = _desktop->namedview->snap_manager;
943 if ( state & GDK_CONTROL_MASK ) {
944 s[perp] = fabs(s[axis]);
946 std::pair<NR::Coord, bool> const bb = m.freeSnapStretch(
947 Snapper::BBOX_POINT,
948 _bbox_points,
949 it,
950 s[axis],
951 _origin,
952 axis,
953 true);
955 std::pair<NR::Coord, bool> const sn = m.freeSnapStretch(
956 Snapper::SNAP_POINT,
957 _snap_points,
958 it,
959 s[axis],
960 _origin,
961 axis,
962 true);
964 NR::Coord const bd = bb.second ? fabs(bb.first - s[axis]) : NR_HUGE;
965 NR::Coord const sd = sn.second ? fabs(sn.first - s[axis]) : NR_HUGE;
966 NR::Coord const ratio = (bd < sd) ? bb.first : sn.first;
968 s[axis] = fabs(ratio) * sign(s[axis]);
969 s[perp] = fabs(s[axis]);
970 } else {
972 std::pair<NR::Coord, bool> const bb = m.freeSnapStretch(
973 Snapper::BBOX_POINT,
974 _bbox_points,
975 it,
976 s[axis],
977 _origin,
978 axis,
979 false);
981 std::pair<NR::Coord, bool> const sn = m.freeSnapStretch(
982 Snapper::SNAP_POINT,
983 _snap_points,
984 it,
985 s[axis],
986 _origin,
987 axis,
988 false);
990 /* Choose the smaller difference in scale */
991 NR::Coord const bd = bb.second ? fabs(bb.first - s[axis]) : NR_HUGE;
992 NR::Coord const sd = sn.second ? fabs(sn.first - s[axis]) : NR_HUGE;
993 s[axis] = (bd < sd) ? bb.first : sn.first;
994 s[perp] = 1;
995 }
997 pt = ( _point - _origin ) * NR::scale(s) + _origin;
998 if (isNaN(pt[X] + pt[Y])) {
999 g_warning("point=(%g, %g), norm=(%g, %g), s=(%g, %g)\n",
1000 _point[X], _point[Y], _origin[X], _origin[Y], s[X], s[Y]);
1001 }
1003 // status text
1004 _message_context.setF(Inkscape::NORMAL_MESSAGE,
1005 _("<b>Scale</b>: %0.2f%% x %0.2f%%; with <b>Ctrl</b> to lock ratio"),
1006 100 * s[NR::X], 100 * s[NR::Y]);
1008 return TRUE;
1009 }
1011 gboolean Inkscape::SelTrans::skewRequest(SPSelTransHandle const &handle, NR::Point &pt, guint state)
1012 {
1013 using NR::X;
1014 using NR::Y;
1016 if (handle.cursor != GDK_SB_V_DOUBLE_ARROW && handle.cursor != GDK_SB_H_DOUBLE_ARROW) {
1017 return FALSE;
1018 }
1020 NR::Dim2 dim_a;
1021 NR::Dim2 dim_b;
1022 if (handle.cursor == GDK_SB_V_DOUBLE_ARROW) {
1023 dim_a = X;
1024 dim_b = Y;
1025 } else {
1026 dim_a = Y;
1027 dim_b = X;
1028 }
1030 double skew[2];
1031 double s[2] = { 1.0, 1.0 };
1033 if (fabs(_point[dim_a] - _origin[dim_a]) < NR_EPSILON) {
1034 return FALSE;
1035 }
1037 skew[dim_a] = ( pt[dim_b] - _point[dim_b] ) / ( _point[dim_a] - _origin[dim_a] );
1039 s[dim_a] = ( pt[dim_a] - _origin[dim_a] ) / ( _point[dim_a] - _origin[dim_a] );
1041 if ( fabs(s[dim_a]) < 1 ) {
1042 s[dim_a] = sign(s[dim_a]);
1043 } else {
1044 s[dim_a] = floor( s[dim_a] + 0.5 );
1045 }
1047 double radians = atan(skew[dim_a] / s[dim_a]);
1049 if (state & GDK_CONTROL_MASK) {
1051 int snaps = prefs_get_int_attribute("options.rotationsnapsperpi", "value", 12);
1053 if (snaps) {
1054 double sections = floor( radians * snaps / M_PI + .5 );
1055 if (fabs(sections) >= snaps / 2) sections = sign(sections) * (snaps / 2 - 1);
1056 radians = ( M_PI / snaps ) * sections;
1057 }
1058 skew[dim_a] = tan(radians) * s[dim_a];
1059 } else {
1060 SnapManager const &m = _desktop->namedview->snap_manager;
1062 std::pair<NR::Coord, bool> bb = m.freeSnapSkew(Inkscape::Snapper::BBOX_POINT,
1063 _bbox_points,
1064 std::list<SPItem const *>(),
1065 skew[dim_a],
1066 _origin,
1067 dim_a);
1069 std::pair<NR::Coord, bool> sn = m.freeSnapSkew(Inkscape::Snapper::SNAP_POINT,
1070 _snap_points,
1071 std::list<SPItem const *>(),
1072 skew[dim_a],
1073 _origin,
1074 dim_a);
1076 if (bb.second || sn.second) {
1077 /* We snapped something, so change the skew to reflect it */
1078 NR::Coord const bd = bb.second ? bb.first : NR_HUGE;
1079 NR::Coord const sd = sn.second ? sn.first : NR_HUGE;
1080 skew[dim_a] = std::min(bd, sd);
1081 }
1082 }
1084 pt[dim_b] = ( _point[dim_a] - _origin[dim_a] ) * skew[dim_a] + _point[dim_b];
1085 pt[dim_a] = ( _point[dim_a] - _origin[dim_a] ) * s[dim_a] + _origin[dim_a];
1087 /* status text */
1088 double degrees = 180 / M_PI * radians;
1089 if (degrees > 180) degrees -= 360;
1090 if (degrees < -180) degrees += 360;
1092 _message_context.setF(Inkscape::NORMAL_MESSAGE,
1093 // TRANSLATORS: don't modify the first ";"
1094 // (it will NOT be displayed as ";" - only the second one will be)
1095 _("<b>Skew</b>: %0.2f°; with <b>Ctrl</b> to snap angle"),
1096 degrees);
1098 return TRUE;
1099 }
1101 gboolean Inkscape::SelTrans::rotateRequest(NR::Point &pt, guint state)
1102 {
1103 int snaps = prefs_get_int_attribute("options.rotationsnapsperpi", "value", 12);
1105 // rotate affine in rotate
1106 NR::Point const d1 = _point - _origin;
1107 NR::Point const d2 = pt - _origin;
1109 NR::Coord const h1 = NR::L2(d1);
1110 if (h1 < 1e-15) return FALSE;
1111 NR::Point q1 = d1 / h1;
1112 NR::Coord const h2 = NR::L2(d2);
1113 if (fabs(h2) < 1e-15) return FALSE;
1114 NR::Point q2 = d2 / h2;
1116 double radians;
1117 if (state & GDK_CONTROL_MASK) {
1118 /* Have to restrict movement. */
1119 double cos_t = NR::dot(q1, q2);
1120 double sin_t = NR::dot(NR::rot90(q1), q2);
1121 radians = atan2(sin_t, cos_t);
1122 if (snaps) {
1123 radians = ( M_PI / snaps ) * floor( radians * snaps / M_PI + .5 );
1124 }
1125 q1 = NR::Point(1, 0);
1126 q2 = NR::Point(cos(radians), sin(radians));
1127 } else {
1128 radians = atan2(NR::dot(NR::rot90(d1), d2),
1129 NR::dot(d1, d2));
1130 }
1132 NR::rotate const r1(q1);
1133 NR::rotate const r2(q2);
1134 pt = _point * NR::translate(-_origin) * ( r2 / r1 ) * NR::translate(_origin);
1136 /* status text */
1137 double degrees = 180 / M_PI * radians;
1138 if (degrees > 180) degrees -= 360;
1139 if (degrees < -180) degrees += 360;
1141 _message_context.setF(Inkscape::NORMAL_MESSAGE,
1142 // TRANSLATORS: don't modify the first ";"
1143 // (it will NOT be displayed as ";" - only the second one will be)
1144 _("<b>Rotate</b>: %0.2f°; with <b>Ctrl</b> to snap angle"), degrees);
1146 return TRUE;
1147 }
1149 gboolean Inkscape::SelTrans::centerRequest(NR::Point &pt, guint state)
1150 {
1151 using NR::X;
1152 using NR::Y;
1154 SnapManager const &m = _desktop->namedview->snap_manager;
1155 pt = m.freeSnap(Snapper::SNAP_POINT, pt, NULL).getPoint();
1157 if (state & GDK_CONTROL_MASK) {
1158 if ( fabs(_point[X] - pt[X]) > fabs(_point[Y] - pt[Y]) ) {
1159 pt[Y] = _point[Y];
1160 } else {
1161 pt[X] = _point[X];
1162 }
1163 }
1165 if (!(state & GDK_SHIFT_MASK)) {
1166 // screen pixels to snap center to bbox
1167 #define SNAP_DIST 5
1168 // FIXME: take from prefs
1169 double snap_dist = SNAP_DIST / _desktop->current_zoom();
1171 for (int i = 0; i < 2; i++) {
1173 if (fabs(pt[i] - _box.min()[i]) < snap_dist) {
1174 pt[i] = _box.min()[i];
1175 }
1176 if (fabs(pt[i] - _box.midpoint()[i]) < snap_dist) {
1177 pt[i] = _box.midpoint()[i];
1178 }
1179 if (fabs(pt[i] - _box.max()[i]) < snap_dist) {
1180 pt[i] = _box.max()[i];
1181 }
1182 }
1183 }
1185 // status text
1186 GString *xs = SP_PX_TO_METRIC_STRING(pt[X], _desktop->namedview->getDefaultMetric());
1187 GString *ys = SP_PX_TO_METRIC_STRING(pt[Y], _desktop->namedview->getDefaultMetric());
1188 _message_context.setF(Inkscape::NORMAL_MESSAGE, _("Move <b>center</b> to %s, %s"), xs->str, ys->str);
1189 g_string_free(xs, FALSE);
1190 g_string_free(ys, FALSE);
1192 return TRUE;
1193 }
1195 /*
1196 * handlers for handle movement
1197 *
1198 */
1200 void sp_sel_trans_stretch(Inkscape::SelTrans *seltrans, SPSelTransHandle const &handle, NR::Point &pt, guint state)
1201 {
1202 seltrans->stretch(handle, pt, state);
1203 }
1205 void sp_sel_trans_scale(Inkscape::SelTrans *seltrans, SPSelTransHandle const &, NR::Point &pt, guint state)
1206 {
1207 seltrans->scale(pt, state);
1208 }
1210 void sp_sel_trans_skew(Inkscape::SelTrans *seltrans, SPSelTransHandle const &handle, NR::Point &pt, guint state)
1211 {
1212 seltrans->skew(handle, pt, state);
1213 }
1215 void sp_sel_trans_rotate(Inkscape::SelTrans *seltrans, SPSelTransHandle const &, NR::Point &pt, guint state)
1216 {
1217 seltrans->rotate(pt, state);
1218 }
1220 void Inkscape::SelTrans::stretch(SPSelTransHandle const &handle, NR::Point &pt, guint state)
1221 {
1222 using NR::X;
1223 using NR::Y;
1225 NR::Dim2 dim;
1226 switch (handle.cursor) {
1227 case GDK_LEFT_SIDE:
1228 case GDK_RIGHT_SIDE:
1229 dim = X;
1230 break;
1231 case GDK_TOP_SIDE:
1232 case GDK_BOTTOM_SIDE:
1233 dim = Y;
1234 break;
1235 default:
1236 g_assert_not_reached();
1237 abort();
1238 break;
1239 }
1241 NR::Point const scale_origin(_origin);
1242 double const offset = _point[dim] - scale_origin[dim];
1243 if (!( fabs(offset) >= 1e-15 )) {
1244 return;
1245 }
1246 NR::scale s(1, 1);
1247 s[dim] = ( pt[dim] - scale_origin[dim] ) / offset;
1248 if (isNaN(s[dim])) {
1249 g_warning("s[dim]=%g, pt[dim]=%g, scale_origin[dim]=%g, point[dim]=%g\n",
1250 s[dim], pt[dim], scale_origin[dim], _point[dim]);
1251 }
1252 if (!( fabs(s[dim]) >= 1e-15 )) {
1253 s[dim] = 1e-15;
1254 }
1255 if (state & GDK_CONTROL_MASK) {
1256 /* Preserve aspect ratio, but never flip in the dimension not being edited. */
1257 s[!dim] = fabs(s[dim]);
1258 }
1260 NR::Point new_bbox_min = _box.min() * (NR::translate(-scale_origin) * NR::Matrix(s) * NR::translate(scale_origin));
1261 NR::Point new_bbox_max = _box.max() * (NR::translate(-scale_origin) * NR::Matrix(s) * NR::translate(scale_origin));
1263 int transform_stroke = prefs_get_int_attribute ("options.transform", "stroke", 1);
1264 NR::Matrix scaler = get_scale_transform_with_stroke (_box, _strokewidth, transform_stroke,
1265 new_bbox_min[NR::X], new_bbox_min[NR::Y], new_bbox_max[NR::X], new_bbox_max[NR::Y]);
1267 transform(scaler, NR::Point(0, 0)); // we have already accounted for origin, so pass 0,0
1268 }
1270 void Inkscape::SelTrans::scale(NR::Point &pt, guint state)
1271 {
1272 NR::Point const offset = _point - _origin;
1274 NR::scale s (1, 1);
1275 for (int i = NR::X; i <= NR::Y; i++) {
1276 if (fabs(offset[i]) > 1e-9)
1277 s[i] = (pt[i] - _origin[i]) / offset[i];
1278 if (fabs(s[i]) < 1e-9)
1279 s[i] = 1e-9;
1280 }
1281 NR::Point new_bbox_min = _box.min() * (NR::translate(-_origin) * NR::Matrix(s) * NR::translate(_origin));
1282 NR::Point new_bbox_max = _box.max() * (NR::translate(-_origin) * NR::Matrix(s) * NR::translate(_origin));
1284 int transform_stroke = prefs_get_int_attribute ("options.transform", "stroke", 1);
1285 NR::Matrix scaler = get_scale_transform_with_stroke (_box, _strokewidth, transform_stroke,
1286 new_bbox_min[NR::X], new_bbox_min[NR::Y], new_bbox_max[NR::X], new_bbox_max[NR::Y]);
1288 transform(scaler, NR::Point(0, 0)); // we have already accounted for origin, so pass 0,0
1289 }
1291 void Inkscape::SelTrans::skew(SPSelTransHandle const &handle, NR::Point &pt, guint state)
1292 {
1293 NR::Point const offset = _point - _origin;
1295 unsigned dim;
1296 switch (handle.cursor) {
1297 case GDK_SB_H_DOUBLE_ARROW:
1298 dim = NR::Y;
1299 break;
1300 case GDK_SB_V_DOUBLE_ARROW:
1301 dim = NR::X;
1302 break;
1303 default:
1304 g_assert_not_reached();
1305 abort();
1306 break;
1307 }
1308 if (fabs(offset[dim]) < 1e-15) {
1309 return;
1310 }
1311 NR::Matrix skew = NR::identity();
1312 skew[2*dim + dim] = (pt[dim] - _origin[dim]) / offset[dim];
1313 skew[2*dim + (1-dim)] = (pt[1-dim] - _point[1-dim]) / offset[dim];
1314 skew[2*(1-dim) + (dim)] = 0;
1315 skew[2*(1-dim) + (1-dim)] = 1;
1317 for (int i = 0; i < 2; i++) {
1318 if (fabs(skew[3*i]) < 1e-15) {
1319 skew[3*i] = 1e-15;
1320 }
1321 }
1322 transform(skew, _origin);
1323 }
1325 void Inkscape::SelTrans::rotate(NR::Point &pt, guint state)
1326 {
1327 NR::Point const offset = _point - _origin;
1329 NR::Coord const h1 = NR::L2(offset);
1330 if (h1 < 1e-15) {
1331 return;
1332 }
1333 NR::Point const q1 = offset / h1;
1334 NR::Coord const h2 = NR::L2( pt - _origin );
1335 if (h2 < 1e-15) {
1336 return;
1337 }
1338 NR::Point const q2 = (pt - _origin) / h2;
1339 NR::rotate const r1(q1);
1340 NR::rotate const r2(q2);
1342 NR::Matrix rotate( r2 / r1 );
1343 transform(rotate, _origin);
1344 }
1346 void sp_sel_trans_center(Inkscape::SelTrans *seltrans, SPSelTransHandle const &, NR::Point &pt, guint state)
1347 {
1348 seltrans->setCenter(pt);
1349 }
1352 void Inkscape::SelTrans::moveTo(NR::Point const &xy, guint state)
1353 {
1354 SnapManager const &m = _desktop->namedview->snap_manager;
1356 /* The amount that we've moved by during this drag */
1357 NR::Point dxy = xy - _point;
1359 /* Get a STL list of the selected items.
1360 ** FIXME: this should probably be done by Inkscape::Selection.
1361 */
1362 std::list<SPItem const*> it;
1363 for (GSList const *i = _selection->itemList(); i != NULL; i = i->next) {
1364 it.push_back(reinterpret_cast<SPItem*>(i->data));
1365 }
1367 bool const alt = (state & GDK_MOD1_MASK);
1368 bool const control = (state & GDK_CONTROL_MASK);
1369 bool const shift = (state & GDK_SHIFT_MASK);
1371 if (alt) {
1373 /* Alt pressed means keep offset: snap the moved distance to the grid.
1374 ** FIXME: this will snap to more than just the grid, nowadays.
1375 */
1377 dxy = m.freeSnap(Snapper::SNAP_POINT, dxy, NULL).getPoint();
1379 } else if (!shift) {
1381 /* We're snapping to things, possibly with a constraint to horizontal or
1382 ** vertical movement. Obtain a list of possible translations and then
1383 ** pick the smallest.
1384 */
1386 /* This will be our list of possible translations */
1387 std::list<std::pair<NR::Point, bool> > s;
1389 if (control) {
1391 /* Snap to things, and also constrain to horizontal or vertical movement */
1393 for (unsigned int dim = 0; dim < 2; dim++) {
1394 s.push_back(m.constrainedSnapTranslation(Inkscape::Snapper::BBOX_POINT,
1395 _bbox_points,
1396 it,
1397 Inkscape::Snapper::ConstraintLine(component_vectors[dim]),
1398 dxy));
1400 s.push_back(m.constrainedSnapTranslation(Inkscape::Snapper::SNAP_POINT,
1401 _snap_points,
1402 it,
1403 Inkscape::Snapper::ConstraintLine(component_vectors[dim]),
1404 dxy));
1405 }
1407 } else {
1409 /* Snap to things with no constraint */
1411 s.push_back(m.freeSnapTranslation(Inkscape::Snapper::BBOX_POINT,
1412 _bbox_4points, it, dxy));
1413 s.push_back(m.freeSnapTranslation(Inkscape::Snapper::SNAP_POINT,
1414 _snap_points, it, dxy));
1415 }
1417 /* Pick one */
1418 NR::Coord best = NR_HUGE;
1419 for (std::list<std::pair<NR::Point, bool> >::const_iterator i = s.begin(); i != s.end(); i++) {
1420 if (i->second) {
1421 NR::Coord const m = NR::L2(i->first);
1422 if (m < best) {
1423 best = m;
1424 dxy = i->first;
1425 }
1426 }
1427 }
1428 }
1430 if (control) {
1431 /* Ensure that the horizontal and vertical constraint has been applied */
1432 if (fabs(dxy[NR::X]) > fabs(dxy[NR::Y])) {
1433 dxy[NR::Y] = 0;
1434 } else {
1435 dxy[NR::X] = 0;
1436 }
1437 }
1439 NR::Matrix const move((NR::translate(dxy)));
1440 NR::Point const norm(0, 0);
1441 transform(move, norm);
1443 // status text
1444 GString *xs = SP_PX_TO_METRIC_STRING(dxy[NR::X], _desktop->namedview->getDefaultMetric());
1445 GString *ys = SP_PX_TO_METRIC_STRING(dxy[NR::Y], _desktop->namedview->getDefaultMetric());
1446 _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);
1447 g_string_free(xs, TRUE);
1448 g_string_free(ys, TRUE);
1449 }
1452 /*
1453 Local Variables:
1454 mode:c++
1455 c-file-style:"stroustrup"
1456 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
1457 indent-tabs-mode:nil
1458 fill-column:99
1459 End:
1460 */
1461 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4 :