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 _("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);
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 if (_current.is_translation()) {
346 sp_document_done(sp_desktop_document(_desktop), SP_VERB_CONTEXT_SELECT,
347 _("Move"));
348 } else if (_current.is_scale()) {
349 sp_document_done(sp_desktop_document(_desktop), SP_VERB_CONTEXT_SELECT,
350 _("Scale"));
351 } else if (_current.is_rotation()) {
352 sp_document_done(sp_desktop_document(_desktop), SP_VERB_CONTEXT_SELECT,
353 _("Rotate"));
354 } else {
355 sp_document_done(sp_desktop_document(_desktop), SP_VERB_CONTEXT_SELECT,
356 _("Skew"));
357 }
359 updh = false;
360 }
362 for (unsigned i = 0; i < _items.size(); i++) {
363 sp_object_unref(SP_OBJECT(_items[i].first), NULL);
364 }
365 _items.clear();
366 _items_centers.clear();
368 _grabbed = false;
369 _show_handles = true;
371 sp_canvas_item_hide(_norm);
372 sp_canvas_item_hide(_grip);
374 if (_show == SHOW_OUTLINE) {
375 for (int i = 0; i < 4; i++)
376 sp_canvas_item_hide(_l[i]);
377 }
379 _updateVolatileState();
380 if (updh) {
381 _updateHandles();
382 }
383 if (_stamp_cache) {
384 g_slist_free(_stamp_cache);
385 _stamp_cache = NULL;
386 }
388 _message_context.clear();
389 }
391 /* fixme: This is really bad, as we compare positions for each stamp (Lauris) */
392 /* fixme: IMHO the best way to keep sort cache would be to implement timestamping at last */
394 void Inkscape::SelTrans::stamp()
395 {
396 Inkscape::Selection *selection = sp_desktop_selection(_desktop);
398 bool fixup = !_grabbed;
399 if ( fixup && _stamp_cache ) {
400 // TODO - give a proper fix. Simple temproary work-around for the grab() issue
401 g_slist_free(_stamp_cache);
402 _stamp_cache = NULL;
403 }
405 /* stamping mode */
406 if (!_empty) {
407 GSList *l;
408 if (_stamp_cache) {
409 l = _stamp_cache;
410 } else {
411 /* Build cache */
412 l = g_slist_copy((GSList *) selection->itemList());
413 l = g_slist_sort(l, (GCompareFunc) sp_object_compare_position);
414 _stamp_cache = l;
415 }
417 while (l) {
418 SPItem *original_item = SP_ITEM(l->data);
419 Inkscape::XML::Node *original_repr = SP_OBJECT_REPR(original_item);
421 // remember the position of the item
422 gint pos = original_repr->position();
423 // remember parent
424 Inkscape::XML::Node *parent = sp_repr_parent(original_repr);
426 Inkscape::XML::Node *copy_repr = original_repr->duplicate();
428 // add the new repr to the parent
429 parent->appendChild(copy_repr);
430 // move to the saved position
431 copy_repr->setPosition(pos > 0 ? pos : 0);
433 SPItem *copy_item = (SPItem *) sp_desktop_document(_desktop)->getObjectByRepr(copy_repr);
435 NR::Matrix const *new_affine;
436 if (_show == SHOW_OUTLINE) {
437 NR::Matrix const i2d(sp_item_i2d_affine(original_item));
438 NR::Matrix const i2dnew( i2d * _current );
439 sp_item_set_i2d_affine(copy_item, i2dnew);
440 new_affine = ©_item->transform;
441 } else {
442 new_affine = &original_item->transform;
443 }
445 sp_item_write_transform(copy_item, copy_repr, *new_affine);
447 if (copy_item->isCenterSet()) {
448 copy_item->setCenter(_center * _current);
449 }
451 Inkscape::GC::release(copy_repr);
452 l = l->next;
453 }
454 sp_document_done(sp_desktop_document(_desktop), SP_VERB_CONTEXT_SELECT,
455 _("Stamp"));
456 }
458 if ( fixup && _stamp_cache ) {
459 // TODO - give a proper fix. Simple temproary work-around for the grab() issue
460 g_slist_free(_stamp_cache);
461 _stamp_cache = NULL;
462 }
463 }
465 void Inkscape::SelTrans::_updateHandles()
466 {
467 if ( !_show_handles || _empty )
468 {
469 sp_remove_handles(_shandle, 8);
470 sp_remove_handles(_rhandle, 8);
471 sp_remove_handles(&_chandle, 1);
472 return;
473 }
475 // center handle
476 if ( _chandle == NULL ) {
477 _chandle = sp_knot_new(_desktop, _("<b>Center</b> of rotation and skewing: drag to reposition; scaling with Shift also uses this center"));
479 _chandle->setShape (SP_CTRL_SHAPE_BITMAP);
480 _chandle->setSize (13);
481 _chandle->setAnchor (handle_center.anchor);
482 _chandle->setMode (SP_CTRL_MODE_XOR);
483 _chandle->setFill(0x00000000, 0x00000000, 0x00000000);
484 _chandle->setStroke(0x000000ff, 0xff0000b0, 0xff0000b0);
485 _chandle->setPixbuf(handles[handle_center.control]);
486 sp_knot_update_ctrl(_chandle);
488 g_signal_connect(G_OBJECT(_chandle), "request",
489 G_CALLBACK(sp_sel_trans_handle_request), (gpointer) &handle_center);
490 g_signal_connect(G_OBJECT(_chandle), "moved",
491 G_CALLBACK(sp_sel_trans_handle_new_event), (gpointer) &handle_center);
492 g_signal_connect(G_OBJECT(_chandle), "grabbed",
493 G_CALLBACK(sp_sel_trans_handle_grab), (gpointer) &handle_center);
494 g_signal_connect(G_OBJECT(_chandle), "ungrabbed",
495 G_CALLBACK(sp_sel_trans_handle_ungrab), (gpointer) &handle_center);
496 g_signal_connect(G_OBJECT(_chandle), "clicked",
497 G_CALLBACK(sp_sel_trans_handle_click), (gpointer) &handle_center);
498 }
500 sp_remove_handles(&_chandle, 1);
501 if ( _state == STATE_SCALE ) {
502 sp_remove_handles(_rhandle, 8);
503 _showHandles(_shandle, handles_scale, 8,
504 _("<b>Squeeze or stretch</b> selection; with <b>Ctrl</b> to scale uniformly; with <b>Shift</b> to scale around rotation center"),
505 _("<b>Scale</b> selection; with <b>Ctrl</b> to scale uniformly; with <b>Shift</b> to scale around rotation center"));
506 } else {
507 sp_remove_handles(_shandle, 8);
508 _showHandles(_rhandle, handles_rotate, 8,
509 _("<b>Skew</b> selection; with <b>Ctrl</b> to snap angle; with <b>Shift</b> to skew around the opposite side"),
510 _("<b>Rotate</b> selection; with <b>Ctrl</b> to snap angle; with <b>Shift</b> to rotate around the opposite corner"));
511 }
513 if (!_center_is_set) {
514 _center = _desktop->selection->center();
515 _center_is_set = true;
516 }
518 if ( _state == STATE_SCALE ) {
519 sp_knot_hide(_chandle);
520 } else {
521 sp_knot_show(_chandle);
522 sp_knot_moveto(_chandle, &_center);
523 }
524 }
526 void Inkscape::SelTrans::_updateVolatileState()
527 {
528 Inkscape::Selection *selection = sp_desktop_selection(_desktop);
529 _empty = selection->isEmpty();
531 if (_empty) {
532 return;
533 }
535 _box = selection->bounds();
536 if (_box.isEmpty()) {
537 _empty = true;
538 return;
539 }
541 _strokewidth = stroke_average_width (selection->itemList());
543 _current.set_identity();
544 }
546 static void sp_remove_handles(SPKnot *knot[], gint num)
547 {
548 for (int i = 0; i < num; i++) {
549 if (knot[i] != NULL) {
550 sp_knot_hide(knot[i]);
551 }
552 }
553 }
555 void Inkscape::SelTrans::_showHandles(SPKnot *knot[], SPSelTransHandle const handle[], gint num,
556 gchar const *even_tip, gchar const *odd_tip)
557 {
558 g_return_if_fail( !_empty );
560 for (int i = 0; i < num; i++) {
561 if (knot[i] == NULL) {
562 knot[i] = sp_knot_new(_desktop, i % 2 ? even_tip : odd_tip);
564 knot[i]->setShape (SP_CTRL_SHAPE_BITMAP);
565 knot[i]->setSize (13);
566 knot[i]->setAnchor (handle[i].anchor);
567 knot[i]->setMode (SP_CTRL_MODE_XOR);
568 knot[i]->setFill(0x000000ff, 0x00ff6600, 0x00ff6600); // inversion, green, green
569 knot[i]->setStroke(0x000000ff, 0x000000ff, 0x000000ff); // inversion
570 knot[i]->setPixbuf(handles[handle[i].control]);
571 sp_knot_update_ctrl(knot[i]);
573 g_signal_connect(G_OBJECT(knot[i]), "request",
574 G_CALLBACK(sp_sel_trans_handle_request), (gpointer) &handle[i]);
575 g_signal_connect(G_OBJECT(knot[i]), "moved",
576 G_CALLBACK(sp_sel_trans_handle_new_event), (gpointer) &handle[i]);
577 g_signal_connect(G_OBJECT(knot[i]), "grabbed",
578 G_CALLBACK(sp_sel_trans_handle_grab), (gpointer) &handle[i]);
579 g_signal_connect(G_OBJECT(knot[i]), "ungrabbed",
580 G_CALLBACK(sp_sel_trans_handle_ungrab), (gpointer) &handle[i]);
581 g_signal_connect(G_OBJECT(knot[i]), "event", G_CALLBACK(sp_seltrans_handle_event), (gpointer) &handle[i]);
582 }
583 sp_knot_show(knot[i]);
585 NR::Point const handle_pt(handle[i].x, handle[i].y);
586 NR::Point p( _box.min()
587 + ( _box.dimensions()
588 * NR::scale(handle_pt) ) );
590 sp_knot_moveto(knot[i], &p);
591 }
592 }
594 static void sp_sel_trans_handle_grab(SPKnot *knot, guint state, gpointer data)
595 {
596 SP_SELECT_CONTEXT(knot->desktop->event_context)->_seltrans->handleGrab(
597 knot, state, *(SPSelTransHandle const *) data
598 );
599 }
601 static void sp_sel_trans_handle_ungrab(SPKnot *knot, guint state, gpointer data)
602 {
603 SP_SELECT_CONTEXT(knot->desktop->event_context)->_seltrans->ungrab();
604 }
606 static void sp_sel_trans_handle_new_event(SPKnot *knot, NR::Point *position, guint state, gpointer data)
607 {
608 SP_SELECT_CONTEXT(knot->desktop->event_context)->_seltrans->handleNewEvent(
609 knot, position, state, *(SPSelTransHandle const *) data
610 );
611 }
613 static gboolean sp_sel_trans_handle_request(SPKnot *knot, NR::Point *position, guint state, gboolean *data)
614 {
615 return SP_SELECT_CONTEXT(knot->desktop->event_context)->_seltrans->handleRequest(
616 knot, position, state, *(SPSelTransHandle const *) data
617 );
618 }
620 static void sp_sel_trans_handle_click(SPKnot *knot, guint state, gpointer data)
621 {
622 SP_SELECT_CONTEXT(knot->desktop->event_context)->_seltrans->handleClick(
623 knot, state, *(SPSelTransHandle const *) data
624 );
625 }
627 void Inkscape::SelTrans::handleClick(SPKnot *knot, guint state, SPSelTransHandle const &handle)
628 {
629 switch (handle.anchor) {
630 case GTK_ANCHOR_CENTER:
631 if (state & GDK_SHIFT_MASK) {
632 // Unset the center position for all selected items
633 for (GSList const *l = _desktop->selection->itemList(); l; l = l->next) {
634 SPItem *it = (SPItem*)sp_object_ref(SP_OBJECT(l->data), NULL);
635 it->unsetCenter();
636 SP_OBJECT(it)->updateRepr();
637 _center_is_set = false; // center has changed
638 _updateHandles();
639 }
640 sp_document_maybe_done (sp_desktop_document(_desktop), "center::unset", SP_VERB_CONTEXT_SELECT,
641 _("Reset center"));
642 }
643 break;
644 default:
645 break;
646 }
647 }
649 void Inkscape::SelTrans::handleGrab(SPKnot *knot, guint state, SPSelTransHandle const &handle)
650 {
651 switch (handle.anchor) {
652 case GTK_ANCHOR_CENTER:
653 g_object_set(G_OBJECT(_grip),
654 "shape", SP_CTRL_SHAPE_BITMAP,
655 "size", 13.0,
656 NULL);
657 sp_canvas_item_show(_grip);
658 break;
659 default:
660 g_object_set(G_OBJECT(_grip),
661 "shape", SP_CTRL_SHAPE_CROSS,
662 "size", 7.0,
663 NULL);
664 sp_canvas_item_show(_norm);
665 sp_canvas_item_show(_grip);
667 break;
668 }
670 grab(sp_knot_position(knot), handle.x, handle.y, FALSE);
671 }
674 void Inkscape::SelTrans::handleNewEvent(SPKnot *knot, NR::Point *position, guint state, SPSelTransHandle const &handle)
675 {
676 if (!SP_KNOT_IS_GRABBED(knot)) {
677 return;
678 }
680 // in case items have been unhooked from the document, don't
681 // try to continue processing events for them.
682 for (unsigned int i = 0; i < _items.size(); i++) {
683 if (!SP_OBJECT_DOCUMENT(SP_OBJECT(_items[i].first)) ) {
684 return;
685 }
686 }
688 handle.action(this, handle, *position, state);
689 }
692 gboolean Inkscape::SelTrans::handleRequest(SPKnot *knot, NR::Point *position, guint state, SPSelTransHandle const &handle)
693 {
694 if (!SP_KNOT_IS_GRABBED(knot)) {
695 return TRUE;
696 }
698 knot->desktop->set_coordinate_status(*position);
699 knot->desktop->setPosition(*position);
702 if (state & GDK_MOD1_MASK) {
703 *position = _point + ( *position - _point ) / 10;
704 }
706 if (!(state & GDK_SHIFT_MASK) == !(_state == STATE_ROTATE)) {
707 _origin = _opposite;
708 } else {
709 _origin = _center;
710 }
711 if (handle.request(this, handle, *position, state)) {
712 sp_knot_set_position(knot, position, state);
713 SP_CTRL(_grip)->moveto(*position);
714 SP_CTRL(_norm)->moveto(_origin);
715 }
717 return TRUE;
718 }
721 void Inkscape::SelTrans::_selChanged(Inkscape::Selection *selection)
722 {
723 if (!_grabbed) {
724 _updateVolatileState();
725 _center_is_set = false; // center(s) may have changed
726 _updateHandles();
727 }
728 }
730 void Inkscape::SelTrans::_selModified(Inkscape::Selection *selection, guint flags)
731 {
732 if (!_grabbed) {
733 _updateVolatileState();
735 // reset internal flag
736 _changed = false;
738 _center_is_set = false; // center(s) may have changed
740 _updateHandles();
741 }
742 }
744 /*
745 * handlers for handle move-request
746 */
748 /** Returns -1 or 1 according to the sign of x. Returns 1 for 0 and NaN. */
749 static double sign(double const x)
750 {
751 return ( x < 0
752 ? -1
753 : 1 );
754 }
756 gboolean sp_sel_trans_scale_request(Inkscape::SelTrans *seltrans,
757 SPSelTransHandle const &, NR::Point &pt, guint state)
758 {
759 return seltrans->scaleRequest(pt, state);
760 }
762 gboolean sp_sel_trans_stretch_request(Inkscape::SelTrans *seltrans,
763 SPSelTransHandle const &handle, NR::Point &pt, guint state)
764 {
765 return seltrans->stretchRequest(handle, pt, state);
766 }
768 gboolean sp_sel_trans_skew_request(Inkscape::SelTrans *seltrans,
769 SPSelTransHandle const &handle, NR::Point &pt, guint state)
770 {
771 return seltrans->skewRequest(handle, pt, state);
772 }
774 gboolean sp_sel_trans_rotate_request(Inkscape::SelTrans *seltrans,
775 SPSelTransHandle const &, NR::Point &pt, guint state)
776 {
777 return seltrans->rotateRequest(pt, state);
778 }
780 gboolean sp_sel_trans_center_request(Inkscape::SelTrans *seltrans,
781 SPSelTransHandle const &, NR::Point &pt, guint state)
782 {
783 return seltrans->centerRequest(pt, state);
784 }
786 gboolean Inkscape::SelTrans::scaleRequest(NR::Point &pt, guint state)
787 {
788 using NR::X;
789 using NR::Y;
791 NR::Point d = _point - _origin;
792 NR::scale s(0, 0);
794 /* Work out the new scale factors `s' */
795 for ( unsigned int i = 0 ; i < 2 ; i++ ) {
796 if ( fabs(d[i]) > 0.001 ) {
797 s[i] = ( pt[i] - _origin[i] ) / d[i];
798 if ( fabs(s[i]) < 1e-9 ) {
799 s[i] = 1e-9;
800 }
801 }
802 }
804 SnapManager const &m = _desktop->namedview->snap_manager;
806 /* Get a STL list of the selected items.
807 ** FIXME: this should probably be done by Inkscape::Selection.
808 */
809 std::list<SPItem const*> it;
810 for (GSList const *i = _selection->itemList(); i != NULL; i = i->next) {
811 it.push_back(reinterpret_cast<SPItem*>(i->data));
812 }
814 if ((state & GDK_CONTROL_MASK) || _desktop->isToolboxButtonActive ("lock")) {
815 /* Scale is locked to a 1:1 aspect ratio, so that s[X] must be made to equal s[Y].
816 ** To do this, we snap along a suitable constraint vector from the origin.
817 */
819 NR::Point const cv = NR::Point(
820 pt[NR::X] > _origin[NR::X] ? 1 : -1,
821 pt[NR::Y] > _origin[NR::Y] ? 1 : -1
822 );
824 std::pair<NR::scale, bool> bb = m.constrainedSnapScale(Snapper::BBOX_POINT,
825 _bbox_points,
826 it,
827 Snapper::ConstraintLine(_origin, cv),
828 s,
829 _origin);
831 std::pair<NR::scale, bool> sn = m.constrainedSnapScale(Snapper::SNAP_POINT,
832 _snap_points,
833 it,
834 Snapper::ConstraintLine(_origin, cv),
835 s,
836 _origin);
838 if (bb.second == false && sn.second == false) {
840 /* We didn't snap, so just lock aspect ratio */
841 if (fabs(s[NR::X]) > fabs(s[NR::Y])) {
842 s[NR::X] = fabs(s[NR::Y]) * sign(s[NR::X]);
843 } else {
844 s[NR::Y] = fabs(s[NR::X]) * sign(s[NR::Y]);
845 }
847 } else {
849 /* Choose the smaller difference in scale. Since s[X] == s[Y] we can
850 ** just compare difference in s[X].
851 */
852 double const bd = bb.second ? fabs(bb.first[NR::X] - s[NR::X]) : NR_HUGE;
853 double const sd = sn.second ? fabs(sn.first[NR::X] - s[NR::X]) : NR_HUGE;
854 s = (bd < sd) ? bb.first : sn.first;
855 }
857 } else {
858 /* Scale aspect ratio is unlocked */
860 std::pair<NR::scale, bool> bb = m.freeSnapScale(Snapper::BBOX_POINT,
861 _bbox_points,
862 it,
863 s,
864 _origin);
865 std::pair<NR::scale, bool> sn = m.freeSnapScale(Snapper::SNAP_POINT,
866 _snap_points,
867 it,
868 s,
869 _origin);
871 /* Pick the snap that puts us closest to the original scale */
872 NR::Coord bd = bb.second ?
873 fabs(NR::L2(NR::Point(bb.first[NR::X], bb.first[NR::Y])) -
874 NR::L2(NR::Point(s[NR::X], s[NR::Y])))
875 : NR_HUGE;
876 NR::Coord sd = sn.second ?
877 fabs(NR::L2(NR::Point(sn.first[NR::X], sn.first[NR::Y])) -
878 NR::L2(NR::Point(s[NR::X], s[NR::Y])))
879 : NR_HUGE;
880 s = (bd < sd) ? bb.first : sn.first;
881 }
883 /* Update the knot position */
884 pt = ( _point - _origin ) * s + _origin;
886 /* Status text */
887 _message_context.setF(Inkscape::NORMAL_MESSAGE,
888 _("<b>Scale</b>: %0.2f%% x %0.2f%%; with <b>Ctrl</b> to lock ratio"),
889 100 * s[NR::X], 100 * s[NR::Y]);
891 return TRUE;
892 }
894 gboolean Inkscape::SelTrans::stretchRequest(SPSelTransHandle const &handle, NR::Point &pt, guint state)
895 {
896 using NR::X;
897 using NR::Y;
899 NR::Dim2 axis, perp;
901 switch (handle.cursor) {
902 case GDK_TOP_SIDE:
903 case GDK_BOTTOM_SIDE:
904 axis = NR::Y;
905 perp = NR::X;
906 break;
907 case GDK_LEFT_SIDE:
908 case GDK_RIGHT_SIDE:
909 axis = NR::X;
910 perp = NR::Y;
911 break;
912 default:
913 g_assert_not_reached();
914 return TRUE;
915 };
917 if ( fabs( _point[axis] - _origin[axis] ) < 1e-15 ) {
918 return FALSE;
919 }
921 NR::scale s(1, 1);
922 s[axis] = ( ( pt[axis] - _origin[axis] )
923 / ( _point[axis] - _origin[axis] ) );
924 if ( fabs(s[axis]) < 1e-15 ) {
925 s[axis] = 1e-15;
926 }
928 /* Get a STL list of the selected items.
929 ** FIXME: this should probably be done by Inkscape::Selection.
930 */
931 std::list<SPItem const*> it;
932 for (GSList const *i = _selection->itemList(); i != NULL; i = i->next) {
933 it.push_back(reinterpret_cast<SPItem*>(i->data));
934 }
936 SnapManager const &m = _desktop->namedview->snap_manager;
938 if ( state & GDK_CONTROL_MASK ) {
939 s[perp] = fabs(s[axis]);
941 std::pair<NR::Coord, bool> const bb = m.freeSnapStretch(
942 Snapper::BBOX_POINT,
943 _bbox_points,
944 it,
945 s[axis],
946 _origin,
947 axis,
948 true);
950 std::pair<NR::Coord, bool> const sn = m.freeSnapStretch(
951 Snapper::SNAP_POINT,
952 _snap_points,
953 it,
954 s[axis],
955 _origin,
956 axis,
957 true);
959 NR::Coord const bd = bb.second ? fabs(bb.first - s[axis]) : NR_HUGE;
960 NR::Coord const sd = sn.second ? fabs(sn.first - s[axis]) : NR_HUGE;
961 NR::Coord const ratio = (bd < sd) ? bb.first : sn.first;
963 s[axis] = fabs(ratio) * sign(s[axis]);
964 s[perp] = fabs(s[axis]);
965 } else {
967 std::pair<NR::Coord, bool> const bb = m.freeSnapStretch(
968 Snapper::BBOX_POINT,
969 _bbox_points,
970 it,
971 s[axis],
972 _origin,
973 axis,
974 false);
976 std::pair<NR::Coord, bool> const sn = m.freeSnapStretch(
977 Snapper::SNAP_POINT,
978 _snap_points,
979 it,
980 s[axis],
981 _origin,
982 axis,
983 false);
985 /* Choose the smaller difference in scale */
986 NR::Coord const bd = bb.second ? fabs(bb.first - s[axis]) : NR_HUGE;
987 NR::Coord const sd = sn.second ? fabs(sn.first - s[axis]) : NR_HUGE;
988 s[axis] = (bd < sd) ? bb.first : sn.first;
989 s[perp] = 1;
990 }
992 pt = ( _point - _origin ) * NR::scale(s) + _origin;
993 if (isNaN(pt[X] + pt[Y])) {
994 g_warning("point=(%g, %g), norm=(%g, %g), s=(%g, %g)\n",
995 _point[X], _point[Y], _origin[X], _origin[Y], s[X], s[Y]);
996 }
998 // status text
999 _message_context.setF(Inkscape::NORMAL_MESSAGE,
1000 _("<b>Scale</b>: %0.2f%% x %0.2f%%; with <b>Ctrl</b> to lock ratio"),
1001 100 * s[NR::X], 100 * s[NR::Y]);
1003 return TRUE;
1004 }
1006 gboolean Inkscape::SelTrans::skewRequest(SPSelTransHandle const &handle, NR::Point &pt, guint state)
1007 {
1008 using NR::X;
1009 using NR::Y;
1011 if (handle.cursor != GDK_SB_V_DOUBLE_ARROW && handle.cursor != GDK_SB_H_DOUBLE_ARROW) {
1012 return FALSE;
1013 }
1015 NR::Dim2 dim_a;
1016 NR::Dim2 dim_b;
1017 if (handle.cursor == GDK_SB_V_DOUBLE_ARROW) {
1018 dim_a = X;
1019 dim_b = Y;
1020 } else {
1021 dim_a = Y;
1022 dim_b = X;
1023 }
1025 double skew[2];
1026 double s[2] = { 1.0, 1.0 };
1028 if (fabs(_point[dim_a] - _origin[dim_a]) < NR_EPSILON) {
1029 return FALSE;
1030 }
1032 skew[dim_a] = ( pt[dim_b] - _point[dim_b] ) / ( _point[dim_a] - _origin[dim_a] );
1034 s[dim_a] = ( pt[dim_a] - _origin[dim_a] ) / ( _point[dim_a] - _origin[dim_a] );
1036 if ( fabs(s[dim_a]) < 1 ) {
1037 s[dim_a] = sign(s[dim_a]);
1038 } else {
1039 s[dim_a] = floor( s[dim_a] + 0.5 );
1040 }
1042 double radians = atan(skew[dim_a] / s[dim_a]);
1044 if (state & GDK_CONTROL_MASK) {
1046 int snaps = prefs_get_int_attribute("options.rotationsnapsperpi", "value", 12);
1048 if (snaps) {
1049 double sections = floor( radians * snaps / M_PI + .5 );
1050 if (fabs(sections) >= snaps / 2) sections = sign(sections) * (snaps / 2 - 1);
1051 radians = ( M_PI / snaps ) * sections;
1052 }
1053 skew[dim_a] = tan(radians) * s[dim_a];
1054 } else {
1055 SnapManager const &m = _desktop->namedview->snap_manager;
1057 std::pair<NR::Coord, bool> bb = m.freeSnapSkew(Inkscape::Snapper::BBOX_POINT,
1058 _bbox_points,
1059 std::list<SPItem const *>(),
1060 skew[dim_a],
1061 _origin,
1062 dim_a);
1064 std::pair<NR::Coord, bool> sn = m.freeSnapSkew(Inkscape::Snapper::SNAP_POINT,
1065 _snap_points,
1066 std::list<SPItem const *>(),
1067 skew[dim_a],
1068 _origin,
1069 dim_a);
1071 if (bb.second || sn.second) {
1072 /* We snapped something, so change the skew to reflect it */
1073 NR::Coord const bd = bb.second ? bb.first : NR_HUGE;
1074 NR::Coord const sd = sn.second ? sn.first : NR_HUGE;
1075 skew[dim_a] = std::min(bd, sd);
1076 }
1077 }
1079 pt[dim_b] = ( _point[dim_a] - _origin[dim_a] ) * skew[dim_a] + _point[dim_b];
1080 pt[dim_a] = ( _point[dim_a] - _origin[dim_a] ) * s[dim_a] + _origin[dim_a];
1082 /* status text */
1083 double degrees = 180 / M_PI * radians;
1084 if (degrees > 180) degrees -= 360;
1085 if (degrees < -180) degrees += 360;
1087 _message_context.setF(Inkscape::NORMAL_MESSAGE,
1088 // TRANSLATORS: don't modify the first ";"
1089 // (it will NOT be displayed as ";" - only the second one will be)
1090 _("<b>Skew</b>: %0.2f°; with <b>Ctrl</b> to snap angle"),
1091 degrees);
1093 return TRUE;
1094 }
1096 gboolean Inkscape::SelTrans::rotateRequest(NR::Point &pt, guint state)
1097 {
1098 int snaps = prefs_get_int_attribute("options.rotationsnapsperpi", "value", 12);
1100 // rotate affine in rotate
1101 NR::Point const d1 = _point - _origin;
1102 NR::Point const d2 = pt - _origin;
1104 NR::Coord const h1 = NR::L2(d1);
1105 if (h1 < 1e-15) return FALSE;
1106 NR::Point q1 = d1 / h1;
1107 NR::Coord const h2 = NR::L2(d2);
1108 if (fabs(h2) < 1e-15) return FALSE;
1109 NR::Point q2 = d2 / h2;
1111 double radians;
1112 if (state & GDK_CONTROL_MASK) {
1113 /* Have to restrict movement. */
1114 double cos_t = NR::dot(q1, q2);
1115 double sin_t = NR::dot(NR::rot90(q1), q2);
1116 radians = atan2(sin_t, cos_t);
1117 if (snaps) {
1118 radians = ( M_PI / snaps ) * floor( radians * snaps / M_PI + .5 );
1119 }
1120 q1 = NR::Point(1, 0);
1121 q2 = NR::Point(cos(radians), sin(radians));
1122 } else {
1123 radians = atan2(NR::dot(NR::rot90(d1), d2),
1124 NR::dot(d1, d2));
1125 }
1127 NR::rotate const r1(q1);
1128 NR::rotate const r2(q2);
1129 pt = _point * NR::translate(-_origin) * ( r2 / r1 ) * NR::translate(_origin);
1131 /* status text */
1132 double degrees = 180 / M_PI * radians;
1133 if (degrees > 180) degrees -= 360;
1134 if (degrees < -180) degrees += 360;
1136 _message_context.setF(Inkscape::NORMAL_MESSAGE,
1137 // TRANSLATORS: don't modify the first ";"
1138 // (it will NOT be displayed as ";" - only the second one will be)
1139 _("<b>Rotate</b>: %0.2f°; with <b>Ctrl</b> to snap angle"), degrees);
1141 return TRUE;
1142 }
1144 gboolean Inkscape::SelTrans::centerRequest(NR::Point &pt, guint state)
1145 {
1146 using NR::X;
1147 using NR::Y;
1149 SnapManager const &m = _desktop->namedview->snap_manager;
1150 pt = m.freeSnap(Snapper::SNAP_POINT, pt, NULL).getPoint();
1152 if (state & GDK_CONTROL_MASK) {
1153 if ( fabs(_point[X] - pt[X]) > fabs(_point[Y] - pt[Y]) ) {
1154 pt[Y] = _point[Y];
1155 } else {
1156 pt[X] = _point[X];
1157 }
1158 }
1160 if (!(state & GDK_SHIFT_MASK)) {
1161 // screen pixels to snap center to bbox
1162 #define SNAP_DIST 5
1163 // FIXME: take from prefs
1164 double snap_dist = SNAP_DIST / _desktop->current_zoom();
1166 for (int i = 0; i < 2; i++) {
1168 if (fabs(pt[i] - _box.min()[i]) < snap_dist) {
1169 pt[i] = _box.min()[i];
1170 }
1171 if (fabs(pt[i] - _box.midpoint()[i]) < snap_dist) {
1172 pt[i] = _box.midpoint()[i];
1173 }
1174 if (fabs(pt[i] - _box.max()[i]) < snap_dist) {
1175 pt[i] = _box.max()[i];
1176 }
1177 }
1178 }
1180 // status text
1181 GString *xs = SP_PX_TO_METRIC_STRING(pt[X], _desktop->namedview->getDefaultMetric());
1182 GString *ys = SP_PX_TO_METRIC_STRING(pt[Y], _desktop->namedview->getDefaultMetric());
1183 _message_context.setF(Inkscape::NORMAL_MESSAGE, _("Move <b>center</b> to %s, %s"), xs->str, ys->str);
1184 g_string_free(xs, FALSE);
1185 g_string_free(ys, FALSE);
1187 return TRUE;
1188 }
1190 /*
1191 * handlers for handle movement
1192 *
1193 */
1195 void sp_sel_trans_stretch(Inkscape::SelTrans *seltrans, SPSelTransHandle const &handle, NR::Point &pt, guint state)
1196 {
1197 seltrans->stretch(handle, pt, state);
1198 }
1200 void sp_sel_trans_scale(Inkscape::SelTrans *seltrans, SPSelTransHandle const &, NR::Point &pt, guint state)
1201 {
1202 seltrans->scale(pt, state);
1203 }
1205 void sp_sel_trans_skew(Inkscape::SelTrans *seltrans, SPSelTransHandle const &handle, NR::Point &pt, guint state)
1206 {
1207 seltrans->skew(handle, pt, state);
1208 }
1210 void sp_sel_trans_rotate(Inkscape::SelTrans *seltrans, SPSelTransHandle const &, NR::Point &pt, guint state)
1211 {
1212 seltrans->rotate(pt, state);
1213 }
1215 void Inkscape::SelTrans::stretch(SPSelTransHandle const &handle, NR::Point &pt, guint state)
1216 {
1217 using NR::X;
1218 using NR::Y;
1220 NR::Dim2 dim;
1221 switch (handle.cursor) {
1222 case GDK_LEFT_SIDE:
1223 case GDK_RIGHT_SIDE:
1224 dim = X;
1225 break;
1226 case GDK_TOP_SIDE:
1227 case GDK_BOTTOM_SIDE:
1228 dim = Y;
1229 break;
1230 default:
1231 g_assert_not_reached();
1232 abort();
1233 break;
1234 }
1236 NR::Point const scale_origin(_origin);
1237 double const offset = _point[dim] - scale_origin[dim];
1238 if (!( fabs(offset) >= 1e-15 )) {
1239 return;
1240 }
1241 NR::scale s(1, 1);
1242 s[dim] = ( pt[dim] - scale_origin[dim] ) / offset;
1243 if (isNaN(s[dim])) {
1244 g_warning("s[dim]=%g, pt[dim]=%g, scale_origin[dim]=%g, point[dim]=%g\n",
1245 s[dim], pt[dim], scale_origin[dim], _point[dim]);
1246 }
1247 if (!( fabs(s[dim]) >= 1e-15 )) {
1248 s[dim] = 1e-15;
1249 }
1250 if (state & GDK_CONTROL_MASK) {
1251 /* Preserve aspect ratio, but never flip in the dimension not being edited. */
1252 s[!dim] = fabs(s[dim]);
1253 }
1255 NR::Point new_bbox_min = _box.min() * (NR::translate(-scale_origin) * NR::Matrix(s) * NR::translate(scale_origin));
1256 NR::Point new_bbox_max = _box.max() * (NR::translate(-scale_origin) * NR::Matrix(s) * NR::translate(scale_origin));
1258 int transform_stroke = prefs_get_int_attribute ("options.transform", "stroke", 1);
1259 NR::Matrix scaler = get_scale_transform_with_stroke (_box, _strokewidth, transform_stroke,
1260 new_bbox_min[NR::X], new_bbox_min[NR::Y], new_bbox_max[NR::X], new_bbox_max[NR::Y]);
1262 transform(scaler, NR::Point(0, 0)); // we have already accounted for origin, so pass 0,0
1263 }
1265 void Inkscape::SelTrans::scale(NR::Point &pt, guint state)
1266 {
1267 NR::Point const offset = _point - _origin;
1269 NR::scale s (1, 1);
1270 for (int i = NR::X; i <= NR::Y; i++) {
1271 if (fabs(offset[i]) > 1e-9)
1272 s[i] = (pt[i] - _origin[i]) / offset[i];
1273 if (fabs(s[i]) < 1e-9)
1274 s[i] = 1e-9;
1275 }
1276 NR::Point new_bbox_min = _box.min() * (NR::translate(-_origin) * NR::Matrix(s) * NR::translate(_origin));
1277 NR::Point new_bbox_max = _box.max() * (NR::translate(-_origin) * NR::Matrix(s) * NR::translate(_origin));
1279 int transform_stroke = prefs_get_int_attribute ("options.transform", "stroke", 1);
1280 NR::Matrix scaler = get_scale_transform_with_stroke (_box, _strokewidth, transform_stroke,
1281 new_bbox_min[NR::X], new_bbox_min[NR::Y], new_bbox_max[NR::X], new_bbox_max[NR::Y]);
1283 transform(scaler, NR::Point(0, 0)); // we have already accounted for origin, so pass 0,0
1284 }
1286 void Inkscape::SelTrans::skew(SPSelTransHandle const &handle, NR::Point &pt, guint state)
1287 {
1288 NR::Point const offset = _point - _origin;
1290 unsigned dim;
1291 switch (handle.cursor) {
1292 case GDK_SB_H_DOUBLE_ARROW:
1293 dim = NR::Y;
1294 break;
1295 case GDK_SB_V_DOUBLE_ARROW:
1296 dim = NR::X;
1297 break;
1298 default:
1299 g_assert_not_reached();
1300 abort();
1301 break;
1302 }
1303 if (fabs(offset[dim]) < 1e-15) {
1304 return;
1305 }
1306 NR::Matrix skew = NR::identity();
1307 skew[2*dim + dim] = (pt[dim] - _origin[dim]) / offset[dim];
1308 skew[2*dim + (1-dim)] = (pt[1-dim] - _point[1-dim]) / offset[dim];
1309 skew[2*(1-dim) + (dim)] = 0;
1310 skew[2*(1-dim) + (1-dim)] = 1;
1312 for (int i = 0; i < 2; i++) {
1313 if (fabs(skew[3*i]) < 1e-15) {
1314 skew[3*i] = 1e-15;
1315 }
1316 }
1317 transform(skew, _origin);
1318 }
1320 void Inkscape::SelTrans::rotate(NR::Point &pt, guint state)
1321 {
1322 NR::Point const offset = _point - _origin;
1324 NR::Coord const h1 = NR::L2(offset);
1325 if (h1 < 1e-15) {
1326 return;
1327 }
1328 NR::Point const q1 = offset / h1;
1329 NR::Coord const h2 = NR::L2( pt - _origin );
1330 if (h2 < 1e-15) {
1331 return;
1332 }
1333 NR::Point const q2 = (pt - _origin) / h2;
1334 NR::rotate const r1(q1);
1335 NR::rotate const r2(q2);
1337 NR::Matrix rotate( r2 / r1 );
1338 transform(rotate, _origin);
1339 }
1341 void sp_sel_trans_center(Inkscape::SelTrans *seltrans, SPSelTransHandle const &, NR::Point &pt, guint state)
1342 {
1343 seltrans->setCenter(pt);
1344 }
1347 void Inkscape::SelTrans::moveTo(NR::Point const &xy, guint state)
1348 {
1349 SnapManager const &m = _desktop->namedview->snap_manager;
1351 /* The amount that we've moved by during this drag */
1352 NR::Point dxy = xy - _point;
1354 /* Get a STL list of the selected items.
1355 ** FIXME: this should probably be done by Inkscape::Selection.
1356 */
1357 std::list<SPItem const*> it;
1358 for (GSList const *i = _selection->itemList(); i != NULL; i = i->next) {
1359 it.push_back(reinterpret_cast<SPItem*>(i->data));
1360 }
1362 bool const alt = (state & GDK_MOD1_MASK);
1363 bool const control = (state & GDK_CONTROL_MASK);
1364 bool const shift = (state & GDK_SHIFT_MASK);
1366 if (alt) {
1368 /* Alt pressed means keep offset: snap the moved distance to the grid.
1369 ** FIXME: this will snap to more than just the grid, nowadays.
1370 */
1372 dxy = m.freeSnap(Snapper::SNAP_POINT, dxy, NULL).getPoint();
1374 } else if (!shift) {
1376 /* We're snapping to things, possibly with a constraint to horizontal or
1377 ** vertical movement. Obtain a list of possible translations and then
1378 ** pick the smallest.
1379 */
1381 /* This will be our list of possible translations */
1382 std::list<std::pair<NR::Point, bool> > s;
1384 if (control) {
1386 /* Snap to things, and also constrain to horizontal or vertical movement */
1388 for (unsigned int dim = 0; dim < 2; dim++) {
1389 s.push_back(m.constrainedSnapTranslation(Inkscape::Snapper::BBOX_POINT,
1390 _bbox_points,
1391 it,
1392 Inkscape::Snapper::ConstraintLine(component_vectors[dim]),
1393 dxy));
1395 s.push_back(m.constrainedSnapTranslation(Inkscape::Snapper::SNAP_POINT,
1396 _snap_points,
1397 it,
1398 Inkscape::Snapper::ConstraintLine(component_vectors[dim]),
1399 dxy));
1400 }
1402 } else {
1404 /* Snap to things with no constraint */
1406 s.push_back(m.freeSnapTranslation(Inkscape::Snapper::BBOX_POINT,
1407 _bbox_points, it, dxy));
1408 s.push_back(m.freeSnapTranslation(Inkscape::Snapper::SNAP_POINT,
1409 _snap_points, it, dxy));
1410 }
1412 /* Pick one */
1413 NR::Coord best = NR_HUGE;
1414 for (std::list<std::pair<NR::Point, bool> >::const_iterator i = s.begin(); i != s.end(); i++) {
1415 if (i->second) {
1416 NR::Coord const m = NR::L2(i->first);
1417 if (m < best) {
1418 best = m;
1419 dxy = i->first;
1420 }
1421 }
1422 }
1423 }
1425 if (control) {
1426 /* Ensure that the horizontal and vertical constraint has been applied */
1427 if (fabs(dxy[NR::X]) > fabs(dxy[NR::Y])) {
1428 dxy[NR::Y] = 0;
1429 } else {
1430 dxy[NR::X] = 0;
1431 }
1432 }
1434 NR::Matrix const move((NR::translate(dxy)));
1435 NR::Point const norm(0, 0);
1436 transform(move, norm);
1438 // status text
1439 GString *xs = SP_PX_TO_METRIC_STRING(dxy[NR::X], _desktop->namedview->getDefaultMetric());
1440 GString *ys = SP_PX_TO_METRIC_STRING(dxy[NR::Y], _desktop->namedview->getDefaultMetric());
1441 _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);
1442 g_string_free(xs, TRUE);
1443 g_string_free(ys, TRUE);
1444 }
1447 /*
1448 Local Variables:
1449 mode:c++
1450 c-file-style:"stroustrup"
1451 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
1452 indent-tabs-mode:nil
1453 fill-column:99
1454 End:
1455 */
1456 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4 :