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();
263 gchar const *scale_origin = prefs_get_string_attribute("tools.select", "scale_origin");
264 bool const origin_on_bbox = (scale_origin == NULL || !strcmp(scale_origin, "bbox"));
265 NR::Rect op_box = _box;
266 if (origin_on_bbox == false && _snap_points.empty() == false) {
267 std::vector<NR::Point>::iterator i = _snap_points.begin();
268 op_box = NR::Rect(*i, *i);
269 i++;
270 while (i != _snap_points.end()) {
271 op_box.expandTo(*i);
272 i++;
273 }
274 }
276 _opposite = ( op_box.min() + ( op_box.dimensions() * NR::scale(1-x, 1-y) ) );
278 if ((x != -1) && (y != -1)) {
279 sp_canvas_item_show(_norm);
280 sp_canvas_item_show(_grip);
281 }
283 if (_show == SHOW_OUTLINE) {
284 for (int i = 0; i < 4; i++)
285 sp_canvas_item_show(_l[i]);
286 }
289 _updateHandles();
290 g_return_if_fail(_stamp_cache == NULL);
291 }
293 void Inkscape::SelTrans::transform(NR::Matrix const &rel_affine, NR::Point const &norm)
294 {
295 g_return_if_fail(_grabbed);
296 g_return_if_fail(!_empty);
298 NR::Matrix const affine( NR::translate(-norm) * rel_affine * NR::translate(norm) );
300 if (_show == SHOW_CONTENT) {
301 // update the content
302 for (unsigned i = 0; i < _items.size(); i++) {
303 SPItem &item = *_items[i].first;
304 NR::Matrix const &prev_transform = _items[i].second;
305 sp_item_set_i2d_affine(&item, prev_transform * affine);
306 }
307 } else {
308 NR::Point p[4];
309 /* update the outline */
310 for (unsigned i = 0 ; i < 4 ; i++) {
311 p[i] = _box.corner(i) * affine;
312 }
313 for (unsigned i = 0 ; i < 4 ; i++) {
314 sp_ctrlline_set_coords(SP_CTRLLINE(_l[i]), p[i], p[(i+1)%4]);
315 }
316 }
318 _current = affine;
319 _changed = true;
320 _updateHandles();
321 }
323 void Inkscape::SelTrans::ungrab()
324 {
325 g_return_if_fail(_grabbed);
326 _grabbed = false;
327 _show_handles = true;
329 Inkscape::Selection *selection = sp_desktop_selection(_desktop);
330 _updateVolatileState();
332 for (unsigned i = 0; i < _items.size(); i++) {
333 sp_object_unref(SP_OBJECT(_items[i].first), NULL);
334 }
336 sp_canvas_item_hide(_norm);
337 sp_canvas_item_hide(_grip);
339 if (_show == SHOW_OUTLINE) {
340 for (int i = 0; i < 4; i++)
341 sp_canvas_item_hide(_l[i]);
342 }
344 if (_stamp_cache) {
345 g_slist_free(_stamp_cache);
346 _stamp_cache = NULL;
347 }
349 _message_context.clear();
351 if (!_empty && _changed) {
352 sp_selection_apply_affine(selection, _current, (_show == SHOW_OUTLINE)? true : false);
353 _center *= _current;
354 _center_is_set = true;
356 // If dragging showed content live, sp_selection_apply_affine cannot change the centers
357 // appropriately - it does not know the original positions of the centers (all objects already have
358 // the new bboxes). So we need to reset the centers from our saved array.
359 if (_show != SHOW_OUTLINE && !_current.is_translation()) {
360 for (unsigned i = 0; i < _items_centers.size(); i++) {
361 SPItem *currentItem = _items_centers[i].first;
362 if (currentItem->isCenterSet()) { // only if it's already set
363 currentItem->setCenter (_items_centers[i].second * _current);
364 SP_OBJECT(currentItem)->updateRepr();
365 }
366 }
367 }
369 _items.clear();
370 _items_centers.clear();
372 if (_current.is_translation()) {
373 sp_document_done(sp_desktop_document(_desktop), SP_VERB_CONTEXT_SELECT,
374 _("Move"));
375 } else if (_current.is_scale()) {
376 sp_document_done(sp_desktop_document(_desktop), SP_VERB_CONTEXT_SELECT,
377 _("Scale"));
378 } else if (_current.is_rotation()) {
379 sp_document_done(sp_desktop_document(_desktop), SP_VERB_CONTEXT_SELECT,
380 _("Rotate"));
381 } else {
382 sp_document_done(sp_desktop_document(_desktop), SP_VERB_CONTEXT_SELECT,
383 _("Skew"));
384 }
386 } else {
387 _items.clear();
388 _items_centers.clear();
389 _updateHandles();
390 }
391 }
393 /* fixme: This is really bad, as we compare positions for each stamp (Lauris) */
394 /* fixme: IMHO the best way to keep sort cache would be to implement timestamping at last */
396 void Inkscape::SelTrans::stamp()
397 {
398 Inkscape::Selection *selection = sp_desktop_selection(_desktop);
400 bool fixup = !_grabbed;
401 if ( fixup && _stamp_cache ) {
402 // TODO - give a proper fix. Simple temproary work-around for the grab() issue
403 g_slist_free(_stamp_cache);
404 _stamp_cache = NULL;
405 }
407 /* stamping mode */
408 if (!_empty) {
409 GSList *l;
410 if (_stamp_cache) {
411 l = _stamp_cache;
412 } else {
413 /* Build cache */
414 l = g_slist_copy((GSList *) selection->itemList());
415 l = g_slist_sort(l, (GCompareFunc) sp_object_compare_position);
416 _stamp_cache = l;
417 }
419 while (l) {
420 SPItem *original_item = SP_ITEM(l->data);
421 Inkscape::XML::Node *original_repr = SP_OBJECT_REPR(original_item);
423 // remember the position of the item
424 gint pos = original_repr->position();
425 // remember parent
426 Inkscape::XML::Node *parent = sp_repr_parent(original_repr);
428 Inkscape::XML::Node *copy_repr = original_repr->duplicate();
430 // add the new repr to the parent
431 parent->appendChild(copy_repr);
432 // move to the saved position
433 copy_repr->setPosition(pos > 0 ? pos : 0);
435 SPItem *copy_item = (SPItem *) sp_desktop_document(_desktop)->getObjectByRepr(copy_repr);
437 NR::Matrix const *new_affine;
438 if (_show == SHOW_OUTLINE) {
439 NR::Matrix const i2d(sp_item_i2d_affine(original_item));
440 NR::Matrix const i2dnew( i2d * _current );
441 sp_item_set_i2d_affine(copy_item, i2dnew);
442 new_affine = ©_item->transform;
443 } else {
444 new_affine = &original_item->transform;
445 }
447 sp_item_write_transform(copy_item, copy_repr, *new_affine);
449 if (copy_item->isCenterSet()) {
450 copy_item->setCenter(_center * _current);
451 }
453 Inkscape::GC::release(copy_repr);
454 l = l->next;
455 }
456 sp_document_done(sp_desktop_document(_desktop), SP_VERB_CONTEXT_SELECT,
457 _("Stamp"));
458 }
460 if ( fixup && _stamp_cache ) {
461 // TODO - give a proper fix. Simple temproary work-around for the grab() issue
462 g_slist_free(_stamp_cache);
463 _stamp_cache = NULL;
464 }
465 }
467 void Inkscape::SelTrans::_updateHandles()
468 {
469 if ( !_show_handles || _empty )
470 {
471 sp_remove_handles(_shandle, 8);
472 sp_remove_handles(_rhandle, 8);
473 sp_remove_handles(&_chandle, 1);
474 return;
475 }
477 // center handle
478 if ( _chandle == NULL ) {
479 _chandle = sp_knot_new(_desktop, _("<b>Center</b> of rotation and skewing: drag to reposition; scaling with Shift also uses this center"));
481 _chandle->setShape (SP_CTRL_SHAPE_BITMAP);
482 _chandle->setSize (13);
483 _chandle->setAnchor (handle_center.anchor);
484 _chandle->setMode (SP_CTRL_MODE_XOR);
485 _chandle->setFill(0x00000000, 0x00000000, 0x00000000);
486 _chandle->setStroke(0x000000ff, 0xff0000b0, 0xff0000b0);
487 _chandle->setPixbuf(handles[handle_center.control]);
488 sp_knot_update_ctrl(_chandle);
490 g_signal_connect(G_OBJECT(_chandle), "request",
491 G_CALLBACK(sp_sel_trans_handle_request), (gpointer) &handle_center);
492 g_signal_connect(G_OBJECT(_chandle), "moved",
493 G_CALLBACK(sp_sel_trans_handle_new_event), (gpointer) &handle_center);
494 g_signal_connect(G_OBJECT(_chandle), "grabbed",
495 G_CALLBACK(sp_sel_trans_handle_grab), (gpointer) &handle_center);
496 g_signal_connect(G_OBJECT(_chandle), "ungrabbed",
497 G_CALLBACK(sp_sel_trans_handle_ungrab), (gpointer) &handle_center);
498 g_signal_connect(G_OBJECT(_chandle), "clicked",
499 G_CALLBACK(sp_sel_trans_handle_click), (gpointer) &handle_center);
500 }
502 sp_remove_handles(&_chandle, 1);
503 if ( _state == STATE_SCALE ) {
504 sp_remove_handles(_rhandle, 8);
505 _showHandles(_shandle, handles_scale, 8,
506 _("<b>Squeeze or stretch</b> selection; with <b>Ctrl</b> to scale uniformly; with <b>Shift</b> to scale around rotation center"),
507 _("<b>Scale</b> selection; with <b>Ctrl</b> to scale uniformly; with <b>Shift</b> to scale around rotation center"));
508 } else {
509 sp_remove_handles(_shandle, 8);
510 _showHandles(_rhandle, handles_rotate, 8,
511 _("<b>Skew</b> selection; with <b>Ctrl</b> to snap angle; with <b>Shift</b> to skew around the opposite side"),
512 _("<b>Rotate</b> selection; with <b>Ctrl</b> to snap angle; with <b>Shift</b> to rotate around the opposite corner"));
513 }
515 if (!_center_is_set) {
516 _center = _desktop->selection->center();
517 _center_is_set = true;
518 }
520 if ( _state == STATE_SCALE ) {
521 sp_knot_hide(_chandle);
522 } else {
523 sp_knot_show(_chandle);
524 sp_knot_moveto(_chandle, &_center);
525 }
526 }
528 void Inkscape::SelTrans::_updateVolatileState()
529 {
530 Inkscape::Selection *selection = sp_desktop_selection(_desktop);
531 _empty = selection->isEmpty();
533 if (_empty) {
534 return;
535 }
537 _box = selection->bounds();
538 if (_box.isEmpty()) {
539 _empty = true;
540 return;
541 }
543 _strokewidth = stroke_average_width (selection->itemList());
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 _current.set_identity();
726 _center_is_set = false; // center(s) may have changed
727 _updateHandles();
728 }
729 }
731 void Inkscape::SelTrans::_selModified(Inkscape::Selection *selection, guint flags)
732 {
733 if (!_grabbed) {
734 _updateVolatileState();
735 _current.set_identity();
737 // reset internal flag
738 _changed = false;
740 _center_is_set = false; // center(s) may have changed
742 _updateHandles();
743 }
744 }
746 /*
747 * handlers for handle move-request
748 */
750 /** Returns -1 or 1 according to the sign of x. Returns 1 for 0 and NaN. */
751 static double sign(double const x)
752 {
753 return ( x < 0
754 ? -1
755 : 1 );
756 }
758 gboolean sp_sel_trans_scale_request(Inkscape::SelTrans *seltrans,
759 SPSelTransHandle const &, NR::Point &pt, guint state)
760 {
761 return seltrans->scaleRequest(pt, state);
762 }
764 gboolean sp_sel_trans_stretch_request(Inkscape::SelTrans *seltrans,
765 SPSelTransHandle const &handle, NR::Point &pt, guint state)
766 {
767 return seltrans->stretchRequest(handle, pt, state);
768 }
770 gboolean sp_sel_trans_skew_request(Inkscape::SelTrans *seltrans,
771 SPSelTransHandle const &handle, NR::Point &pt, guint state)
772 {
773 return seltrans->skewRequest(handle, pt, state);
774 }
776 gboolean sp_sel_trans_rotate_request(Inkscape::SelTrans *seltrans,
777 SPSelTransHandle const &, NR::Point &pt, guint state)
778 {
779 return seltrans->rotateRequest(pt, state);
780 }
782 gboolean sp_sel_trans_center_request(Inkscape::SelTrans *seltrans,
783 SPSelTransHandle const &, NR::Point &pt, guint state)
784 {
785 return seltrans->centerRequest(pt, state);
786 }
788 gboolean Inkscape::SelTrans::scaleRequest(NR::Point &pt, guint state)
789 {
790 using NR::X;
791 using NR::Y;
793 NR::Point d = _point - _origin;
794 NR::scale s(0, 0);
796 /* Work out the new scale factors `s' */
797 for ( unsigned int i = 0 ; i < 2 ; i++ ) {
798 if ( fabs(d[i]) > 0.001 ) {
799 s[i] = ( pt[i] - _origin[i] ) / d[i];
800 if ( fabs(s[i]) < 1e-9 ) {
801 s[i] = 1e-9;
802 }
803 }
804 }
806 SnapManager const &m = _desktop->namedview->snap_manager;
808 /* Get a STL list of the selected items.
809 ** FIXME: this should probably be done by Inkscape::Selection.
810 */
811 std::list<SPItem const*> it;
812 for (GSList const *i = _selection->itemList(); i != NULL; i = i->next) {
813 it.push_back(reinterpret_cast<SPItem*>(i->data));
814 }
816 if ((state & GDK_CONTROL_MASK) || _desktop->isToolboxButtonActive ("lock")) {
817 /* Scale is locked to a 1:1 aspect ratio, so that s[X] must be made to equal s[Y].
818 ** To do this, we snap along a suitable constraint vector from the origin.
819 */
821 NR::Point const cv = NR::Point(
822 pt[NR::X] > _origin[NR::X] ? 1 : -1,
823 pt[NR::Y] > _origin[NR::Y] ? 1 : -1
824 );
826 std::pair<NR::scale, bool> bb = m.constrainedSnapScale(Snapper::BBOX_POINT,
827 _bbox_points,
828 it,
829 Snapper::ConstraintLine(_origin, cv),
830 s,
831 _origin);
833 std::pair<NR::scale, bool> sn = m.constrainedSnapScale(Snapper::SNAP_POINT,
834 _snap_points,
835 it,
836 Snapper::ConstraintLine(_origin, cv),
837 s,
838 _origin);
840 if (bb.second == false && sn.second == false) {
842 /* We didn't snap, so just lock aspect ratio */
843 if (fabs(s[NR::X]) > fabs(s[NR::Y])) {
844 s[NR::X] = fabs(s[NR::Y]) * sign(s[NR::X]);
845 } else {
846 s[NR::Y] = fabs(s[NR::X]) * sign(s[NR::Y]);
847 }
849 } else {
851 /* Choose the smaller difference in scale. Since s[X] == s[Y] we can
852 ** just compare difference in s[X].
853 */
854 double const bd = bb.second ? fabs(bb.first[NR::X] - s[NR::X]) : NR_HUGE;
855 double const sd = sn.second ? fabs(sn.first[NR::X] - s[NR::X]) : NR_HUGE;
856 s = (bd < sd) ? bb.first : sn.first;
857 }
859 } else {
860 /* Scale aspect ratio is unlocked */
862 std::pair<NR::scale, bool> bb = m.freeSnapScale(Snapper::BBOX_POINT,
863 _bbox_points,
864 it,
865 s,
866 _origin);
867 std::pair<NR::scale, bool> sn = m.freeSnapScale(Snapper::SNAP_POINT,
868 _snap_points,
869 it,
870 s,
871 _origin);
873 /* Pick the snap that puts us closest to the original scale */
874 NR::Coord bd = bb.second ?
875 fabs(NR::L2(NR::Point(bb.first[NR::X], bb.first[NR::Y])) -
876 NR::L2(NR::Point(s[NR::X], s[NR::Y])))
877 : NR_HUGE;
878 NR::Coord sd = sn.second ?
879 fabs(NR::L2(NR::Point(sn.first[NR::X], sn.first[NR::Y])) -
880 NR::L2(NR::Point(s[NR::X], s[NR::Y])))
881 : NR_HUGE;
882 s = (bd < sd) ? bb.first : sn.first;
883 }
885 /* Update the knot position */
886 pt = ( _point - _origin ) * s + _origin;
888 /* Status text */
889 _message_context.setF(Inkscape::NORMAL_MESSAGE,
890 _("<b>Scale</b>: %0.2f%% x %0.2f%%; with <b>Ctrl</b> to lock ratio"),
891 100 * s[NR::X], 100 * s[NR::Y]);
893 return TRUE;
894 }
896 gboolean Inkscape::SelTrans::stretchRequest(SPSelTransHandle const &handle, NR::Point &pt, guint state)
897 {
898 using NR::X;
899 using NR::Y;
901 NR::Dim2 axis, perp;
903 switch (handle.cursor) {
904 case GDK_TOP_SIDE:
905 case GDK_BOTTOM_SIDE:
906 axis = NR::Y;
907 perp = NR::X;
908 break;
909 case GDK_LEFT_SIDE:
910 case GDK_RIGHT_SIDE:
911 axis = NR::X;
912 perp = NR::Y;
913 break;
914 default:
915 g_assert_not_reached();
916 return TRUE;
917 };
919 if ( fabs( _point[axis] - _origin[axis] ) < 1e-15 ) {
920 return FALSE;
921 }
923 NR::scale s(1, 1);
924 s[axis] = ( ( pt[axis] - _origin[axis] )
925 / ( _point[axis] - _origin[axis] ) );
926 if ( fabs(s[axis]) < 1e-15 ) {
927 s[axis] = 1e-15;
928 }
930 /* Get a STL list of the selected items.
931 ** FIXME: this should probably be done by Inkscape::Selection.
932 */
933 std::list<SPItem const*> it;
934 for (GSList const *i = _selection->itemList(); i != NULL; i = i->next) {
935 it.push_back(reinterpret_cast<SPItem*>(i->data));
936 }
938 SnapManager const &m = _desktop->namedview->snap_manager;
940 if ( state & GDK_CONTROL_MASK ) {
941 s[perp] = fabs(s[axis]);
943 std::pair<NR::Coord, bool> const bb = m.freeSnapStretch(
944 Snapper::BBOX_POINT,
945 _bbox_points,
946 it,
947 s[axis],
948 _origin,
949 axis,
950 true);
952 std::pair<NR::Coord, bool> const sn = m.freeSnapStretch(
953 Snapper::SNAP_POINT,
954 _snap_points,
955 it,
956 s[axis],
957 _origin,
958 axis,
959 true);
961 NR::Coord const bd = bb.second ? fabs(bb.first - s[axis]) : NR_HUGE;
962 NR::Coord const sd = sn.second ? fabs(sn.first - s[axis]) : NR_HUGE;
963 NR::Coord const ratio = (bd < sd) ? bb.first : sn.first;
965 s[axis] = fabs(ratio) * sign(s[axis]);
966 s[perp] = fabs(s[axis]);
967 } else {
969 std::pair<NR::Coord, bool> const bb = m.freeSnapStretch(
970 Snapper::BBOX_POINT,
971 _bbox_points,
972 it,
973 s[axis],
974 _origin,
975 axis,
976 false);
978 std::pair<NR::Coord, bool> const sn = m.freeSnapStretch(
979 Snapper::SNAP_POINT,
980 _snap_points,
981 it,
982 s[axis],
983 _origin,
984 axis,
985 false);
987 /* Choose the smaller difference in scale */
988 NR::Coord const bd = bb.second ? fabs(bb.first - s[axis]) : NR_HUGE;
989 NR::Coord const sd = sn.second ? fabs(sn.first - s[axis]) : NR_HUGE;
990 s[axis] = (bd < sd) ? bb.first : sn.first;
991 s[perp] = 1;
992 }
994 pt = ( _point - _origin ) * NR::scale(s) + _origin;
995 if (isNaN(pt[X] + pt[Y])) {
996 g_warning("point=(%g, %g), norm=(%g, %g), s=(%g, %g)\n",
997 _point[X], _point[Y], _origin[X], _origin[Y], s[X], s[Y]);
998 }
1000 // status text
1001 _message_context.setF(Inkscape::NORMAL_MESSAGE,
1002 _("<b>Scale</b>: %0.2f%% x %0.2f%%; with <b>Ctrl</b> to lock ratio"),
1003 100 * s[NR::X], 100 * s[NR::Y]);
1005 return TRUE;
1006 }
1008 gboolean Inkscape::SelTrans::skewRequest(SPSelTransHandle const &handle, NR::Point &pt, guint state)
1009 {
1010 using NR::X;
1011 using NR::Y;
1013 if (handle.cursor != GDK_SB_V_DOUBLE_ARROW && handle.cursor != GDK_SB_H_DOUBLE_ARROW) {
1014 return FALSE;
1015 }
1017 NR::Dim2 dim_a;
1018 NR::Dim2 dim_b;
1019 if (handle.cursor == GDK_SB_V_DOUBLE_ARROW) {
1020 dim_a = X;
1021 dim_b = Y;
1022 } else {
1023 dim_a = Y;
1024 dim_b = X;
1025 }
1027 double skew[2];
1028 double s[2] = { 1.0, 1.0 };
1030 if (fabs(_point[dim_a] - _origin[dim_a]) < NR_EPSILON) {
1031 return FALSE;
1032 }
1034 skew[dim_a] = ( pt[dim_b] - _point[dim_b] ) / ( _point[dim_a] - _origin[dim_a] );
1036 s[dim_a] = ( pt[dim_a] - _origin[dim_a] ) / ( _point[dim_a] - _origin[dim_a] );
1038 if ( fabs(s[dim_a]) < 1 ) {
1039 s[dim_a] = sign(s[dim_a]);
1040 } else {
1041 s[dim_a] = floor( s[dim_a] + 0.5 );
1042 }
1044 double radians = atan(skew[dim_a] / s[dim_a]);
1046 if (state & GDK_CONTROL_MASK) {
1048 int snaps = prefs_get_int_attribute("options.rotationsnapsperpi", "value", 12);
1050 if (snaps) {
1051 double sections = floor( radians * snaps / M_PI + .5 );
1052 if (fabs(sections) >= snaps / 2) sections = sign(sections) * (snaps / 2 - 1);
1053 radians = ( M_PI / snaps ) * sections;
1054 }
1055 skew[dim_a] = tan(radians) * s[dim_a];
1056 } else {
1057 SnapManager const &m = _desktop->namedview->snap_manager;
1059 std::pair<NR::Coord, bool> bb = m.freeSnapSkew(Inkscape::Snapper::BBOX_POINT,
1060 _bbox_points,
1061 std::list<SPItem const *>(),
1062 skew[dim_a],
1063 _origin,
1064 dim_a);
1066 std::pair<NR::Coord, bool> sn = m.freeSnapSkew(Inkscape::Snapper::SNAP_POINT,
1067 _snap_points,
1068 std::list<SPItem const *>(),
1069 skew[dim_a],
1070 _origin,
1071 dim_a);
1073 if (bb.second || sn.second) {
1074 /* We snapped something, so change the skew to reflect it */
1075 NR::Coord const bd = bb.second ? bb.first : NR_HUGE;
1076 NR::Coord const sd = sn.second ? sn.first : NR_HUGE;
1077 skew[dim_a] = std::min(bd, sd);
1078 }
1079 }
1081 pt[dim_b] = ( _point[dim_a] - _origin[dim_a] ) * skew[dim_a] + _point[dim_b];
1082 pt[dim_a] = ( _point[dim_a] - _origin[dim_a] ) * s[dim_a] + _origin[dim_a];
1084 /* status text */
1085 double degrees = 180 / M_PI * radians;
1086 if (degrees > 180) degrees -= 360;
1087 if (degrees < -180) degrees += 360;
1089 _message_context.setF(Inkscape::NORMAL_MESSAGE,
1090 // TRANSLATORS: don't modify the first ";"
1091 // (it will NOT be displayed as ";" - only the second one will be)
1092 _("<b>Skew</b>: %0.2f°; with <b>Ctrl</b> to snap angle"),
1093 degrees);
1095 return TRUE;
1096 }
1098 gboolean Inkscape::SelTrans::rotateRequest(NR::Point &pt, guint state)
1099 {
1100 int snaps = prefs_get_int_attribute("options.rotationsnapsperpi", "value", 12);
1102 // rotate affine in rotate
1103 NR::Point const d1 = _point - _origin;
1104 NR::Point const d2 = pt - _origin;
1106 NR::Coord const h1 = NR::L2(d1);
1107 if (h1 < 1e-15) return FALSE;
1108 NR::Point q1 = d1 / h1;
1109 NR::Coord const h2 = NR::L2(d2);
1110 if (fabs(h2) < 1e-15) return FALSE;
1111 NR::Point q2 = d2 / h2;
1113 double radians;
1114 if (state & GDK_CONTROL_MASK) {
1115 /* Have to restrict movement. */
1116 double cos_t = NR::dot(q1, q2);
1117 double sin_t = NR::dot(NR::rot90(q1), q2);
1118 radians = atan2(sin_t, cos_t);
1119 if (snaps) {
1120 radians = ( M_PI / snaps ) * floor( radians * snaps / M_PI + .5 );
1121 }
1122 q1 = NR::Point(1, 0);
1123 q2 = NR::Point(cos(radians), sin(radians));
1124 } else {
1125 radians = atan2(NR::dot(NR::rot90(d1), d2),
1126 NR::dot(d1, d2));
1127 }
1129 NR::rotate const r1(q1);
1130 NR::rotate const r2(q2);
1131 pt = _point * NR::translate(-_origin) * ( r2 / r1 ) * NR::translate(_origin);
1133 /* status text */
1134 double degrees = 180 / M_PI * radians;
1135 if (degrees > 180) degrees -= 360;
1136 if (degrees < -180) degrees += 360;
1138 _message_context.setF(Inkscape::NORMAL_MESSAGE,
1139 // TRANSLATORS: don't modify the first ";"
1140 // (it will NOT be displayed as ";" - only the second one will be)
1141 _("<b>Rotate</b>: %0.2f°; with <b>Ctrl</b> to snap angle"), degrees);
1143 return TRUE;
1144 }
1146 gboolean Inkscape::SelTrans::centerRequest(NR::Point &pt, guint state)
1147 {
1148 using NR::X;
1149 using NR::Y;
1151 SnapManager const &m = _desktop->namedview->snap_manager;
1152 pt = m.freeSnap(Snapper::SNAP_POINT, pt, NULL).getPoint();
1154 if (state & GDK_CONTROL_MASK) {
1155 if ( fabs(_point[X] - pt[X]) > fabs(_point[Y] - pt[Y]) ) {
1156 pt[Y] = _point[Y];
1157 } else {
1158 pt[X] = _point[X];
1159 }
1160 }
1162 if (!(state & GDK_SHIFT_MASK)) {
1163 // screen pixels to snap center to bbox
1164 #define SNAP_DIST 5
1165 // FIXME: take from prefs
1166 double snap_dist = SNAP_DIST / _desktop->current_zoom();
1168 for (int i = 0; i < 2; i++) {
1170 if (fabs(pt[i] - _box.min()[i]) < snap_dist) {
1171 pt[i] = _box.min()[i];
1172 }
1173 if (fabs(pt[i] - _box.midpoint()[i]) < snap_dist) {
1174 pt[i] = _box.midpoint()[i];
1175 }
1176 if (fabs(pt[i] - _box.max()[i]) < snap_dist) {
1177 pt[i] = _box.max()[i];
1178 }
1179 }
1180 }
1182 // status text
1183 GString *xs = SP_PX_TO_METRIC_STRING(pt[X], _desktop->namedview->getDefaultMetric());
1184 GString *ys = SP_PX_TO_METRIC_STRING(pt[Y], _desktop->namedview->getDefaultMetric());
1185 _message_context.setF(Inkscape::NORMAL_MESSAGE, _("Move <b>center</b> to %s, %s"), xs->str, ys->str);
1186 g_string_free(xs, FALSE);
1187 g_string_free(ys, FALSE);
1189 return TRUE;
1190 }
1192 /*
1193 * handlers for handle movement
1194 *
1195 */
1197 void sp_sel_trans_stretch(Inkscape::SelTrans *seltrans, SPSelTransHandle const &handle, NR::Point &pt, guint state)
1198 {
1199 seltrans->stretch(handle, pt, state);
1200 }
1202 void sp_sel_trans_scale(Inkscape::SelTrans *seltrans, SPSelTransHandle const &, NR::Point &pt, guint state)
1203 {
1204 seltrans->scale(pt, state);
1205 }
1207 void sp_sel_trans_skew(Inkscape::SelTrans *seltrans, SPSelTransHandle const &handle, NR::Point &pt, guint state)
1208 {
1209 seltrans->skew(handle, pt, state);
1210 }
1212 void sp_sel_trans_rotate(Inkscape::SelTrans *seltrans, SPSelTransHandle const &, NR::Point &pt, guint state)
1213 {
1214 seltrans->rotate(pt, state);
1215 }
1217 void Inkscape::SelTrans::stretch(SPSelTransHandle const &handle, NR::Point &pt, guint state)
1218 {
1219 using NR::X;
1220 using NR::Y;
1222 NR::Dim2 dim;
1223 switch (handle.cursor) {
1224 case GDK_LEFT_SIDE:
1225 case GDK_RIGHT_SIDE:
1226 dim = X;
1227 break;
1228 case GDK_TOP_SIDE:
1229 case GDK_BOTTOM_SIDE:
1230 dim = Y;
1231 break;
1232 default:
1233 g_assert_not_reached();
1234 abort();
1235 break;
1236 }
1238 NR::Point const scale_origin(_origin);
1239 double const offset = _point[dim] - scale_origin[dim];
1240 if (!( fabs(offset) >= 1e-15 )) {
1241 return;
1242 }
1243 NR::scale s(1, 1);
1244 s[dim] = ( pt[dim] - scale_origin[dim] ) / offset;
1245 if (isNaN(s[dim])) {
1246 g_warning("s[dim]=%g, pt[dim]=%g, scale_origin[dim]=%g, point[dim]=%g\n",
1247 s[dim], pt[dim], scale_origin[dim], _point[dim]);
1248 }
1249 if (!( fabs(s[dim]) >= 1e-15 )) {
1250 s[dim] = 1e-15;
1251 }
1252 if (state & GDK_CONTROL_MASK) {
1253 /* Preserve aspect ratio, but never flip in the dimension not being edited. */
1254 s[!dim] = fabs(s[dim]);
1255 }
1257 NR::Point new_bbox_min = _box.min() * (NR::translate(-scale_origin) * NR::Matrix(s) * NR::translate(scale_origin));
1258 NR::Point new_bbox_max = _box.max() * (NR::translate(-scale_origin) * NR::Matrix(s) * NR::translate(scale_origin));
1260 int transform_stroke = prefs_get_int_attribute ("options.transform", "stroke", 1);
1261 NR::Matrix scaler = get_scale_transform_with_stroke (_box, _strokewidth, transform_stroke,
1262 new_bbox_min[NR::X], new_bbox_min[NR::Y], new_bbox_max[NR::X], new_bbox_max[NR::Y]);
1264 transform(scaler, NR::Point(0, 0)); // we have already accounted for origin, so pass 0,0
1265 }
1267 void Inkscape::SelTrans::scale(NR::Point &pt, guint state)
1268 {
1269 NR::Point const offset = _point - _origin;
1271 NR::scale s (1, 1);
1272 for (int i = NR::X; i <= NR::Y; i++) {
1273 if (fabs(offset[i]) > 1e-9)
1274 s[i] = (pt[i] - _origin[i]) / offset[i];
1275 if (fabs(s[i]) < 1e-9)
1276 s[i] = 1e-9;
1277 }
1278 NR::Point new_bbox_min = _box.min() * (NR::translate(-_origin) * NR::Matrix(s) * NR::translate(_origin));
1279 NR::Point new_bbox_max = _box.max() * (NR::translate(-_origin) * NR::Matrix(s) * NR::translate(_origin));
1281 int transform_stroke = prefs_get_int_attribute ("options.transform", "stroke", 1);
1282 NR::Matrix scaler = get_scale_transform_with_stroke (_box, _strokewidth, transform_stroke,
1283 new_bbox_min[NR::X], new_bbox_min[NR::Y], new_bbox_max[NR::X], new_bbox_max[NR::Y]);
1285 transform(scaler, NR::Point(0, 0)); // we have already accounted for origin, so pass 0,0
1286 }
1288 void Inkscape::SelTrans::skew(SPSelTransHandle const &handle, NR::Point &pt, guint state)
1289 {
1290 NR::Point const offset = _point - _origin;
1292 unsigned dim;
1293 switch (handle.cursor) {
1294 case GDK_SB_H_DOUBLE_ARROW:
1295 dim = NR::Y;
1296 break;
1297 case GDK_SB_V_DOUBLE_ARROW:
1298 dim = NR::X;
1299 break;
1300 default:
1301 g_assert_not_reached();
1302 abort();
1303 break;
1304 }
1305 if (fabs(offset[dim]) < 1e-15) {
1306 return;
1307 }
1308 NR::Matrix skew = NR::identity();
1309 skew[2*dim + dim] = (pt[dim] - _origin[dim]) / offset[dim];
1310 skew[2*dim + (1-dim)] = (pt[1-dim] - _point[1-dim]) / offset[dim];
1311 skew[2*(1-dim) + (dim)] = 0;
1312 skew[2*(1-dim) + (1-dim)] = 1;
1314 for (int i = 0; i < 2; i++) {
1315 if (fabs(skew[3*i]) < 1e-15) {
1316 skew[3*i] = 1e-15;
1317 }
1318 }
1319 transform(skew, _origin);
1320 }
1322 void Inkscape::SelTrans::rotate(NR::Point &pt, guint state)
1323 {
1324 NR::Point const offset = _point - _origin;
1326 NR::Coord const h1 = NR::L2(offset);
1327 if (h1 < 1e-15) {
1328 return;
1329 }
1330 NR::Point const q1 = offset / h1;
1331 NR::Coord const h2 = NR::L2( pt - _origin );
1332 if (h2 < 1e-15) {
1333 return;
1334 }
1335 NR::Point const q2 = (pt - _origin) / h2;
1336 NR::rotate const r1(q1);
1337 NR::rotate const r2(q2);
1339 NR::Matrix rotate( r2 / r1 );
1340 transform(rotate, _origin);
1341 }
1343 void sp_sel_trans_center(Inkscape::SelTrans *seltrans, SPSelTransHandle const &, NR::Point &pt, guint state)
1344 {
1345 seltrans->setCenter(pt);
1346 }
1349 void Inkscape::SelTrans::moveTo(NR::Point const &xy, guint state)
1350 {
1351 SnapManager const &m = _desktop->namedview->snap_manager;
1353 /* The amount that we've moved by during this drag */
1354 NR::Point dxy = xy - _point;
1356 /* Get a STL list of the selected items.
1357 ** FIXME: this should probably be done by Inkscape::Selection.
1358 */
1359 std::list<SPItem const*> it;
1360 for (GSList const *i = _selection->itemList(); i != NULL; i = i->next) {
1361 it.push_back(reinterpret_cast<SPItem*>(i->data));
1362 }
1364 bool const alt = (state & GDK_MOD1_MASK);
1365 bool const control = (state & GDK_CONTROL_MASK);
1366 bool const shift = (state & GDK_SHIFT_MASK);
1368 if (alt) {
1370 /* Alt pressed means keep offset: snap the moved distance to the grid.
1371 ** FIXME: this will snap to more than just the grid, nowadays.
1372 */
1374 dxy = m.freeSnap(Snapper::SNAP_POINT, dxy, NULL).getPoint();
1376 } else if (!shift) {
1378 /* We're snapping to things, possibly with a constraint to horizontal or
1379 ** vertical movement. Obtain a list of possible translations and then
1380 ** pick the smallest.
1381 */
1383 /* This will be our list of possible translations */
1384 std::list<std::pair<NR::Point, bool> > s;
1386 if (control) {
1388 /* Snap to things, and also constrain to horizontal or vertical movement */
1390 for (unsigned int dim = 0; dim < 2; dim++) {
1391 s.push_back(m.constrainedSnapTranslation(Inkscape::Snapper::BBOX_POINT,
1392 _bbox_points,
1393 it,
1394 Inkscape::Snapper::ConstraintLine(component_vectors[dim]),
1395 dxy));
1397 s.push_back(m.constrainedSnapTranslation(Inkscape::Snapper::SNAP_POINT,
1398 _snap_points,
1399 it,
1400 Inkscape::Snapper::ConstraintLine(component_vectors[dim]),
1401 dxy));
1402 }
1404 } else {
1406 /* Snap to things with no constraint */
1408 s.push_back(m.freeSnapTranslation(Inkscape::Snapper::BBOX_POINT,
1409 _bbox_points, it, dxy));
1410 s.push_back(m.freeSnapTranslation(Inkscape::Snapper::SNAP_POINT,
1411 _snap_points, it, dxy));
1412 }
1414 /* Pick one */
1415 NR::Coord best = NR_HUGE;
1416 for (std::list<std::pair<NR::Point, bool> >::const_iterator i = s.begin(); i != s.end(); i++) {
1417 if (i->second) {
1418 NR::Coord const m = NR::L2(i->first);
1419 if (m < best) {
1420 best = m;
1421 dxy = i->first;
1422 }
1423 }
1424 }
1425 }
1427 if (control) {
1428 /* Ensure that the horizontal and vertical constraint has been applied */
1429 if (fabs(dxy[NR::X]) > fabs(dxy[NR::Y])) {
1430 dxy[NR::Y] = 0;
1431 } else {
1432 dxy[NR::X] = 0;
1433 }
1434 }
1436 NR::Matrix const move((NR::translate(dxy)));
1437 NR::Point const norm(0, 0);
1438 transform(move, norm);
1440 // status text
1441 GString *xs = SP_PX_TO_METRIC_STRING(dxy[NR::X], _desktop->namedview->getDefaultMetric());
1442 GString *ys = SP_PX_TO_METRIC_STRING(dxy[NR::Y], _desktop->namedview->getDefaultMetric());
1443 _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);
1444 g_string_free(xs, TRUE);
1445 g_string_free(ys, TRUE);
1446 }
1449 /*
1450 Local Variables:
1451 mode:c++
1452 c-file-style:"stroustrup"
1453 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
1454 indent-tabs-mode:nil
1455 fill-column:99
1456 End:
1457 */
1458 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4 :