1 #define __SP_OBJECT_EDIT_C__
3 /*
4 * Node editing extension to objects
5 *
6 * Authors:
7 * Lauris Kaplinski <lauris@kaplinski.com>
8 * Mitsuru Oka
9 *
10 * Licensed under GNU GPL
11 */
13 #ifdef HAVE_CONFIG_H
14 # include "config.h"
15 #endif
19 #include "sp-item.h"
20 #include "sp-rect.h"
21 #include "box3d.h"
22 #include "sp-ellipse.h"
23 #include "sp-star.h"
24 #include "sp-spiral.h"
25 #include "sp-offset.h"
26 #include "sp-flowtext.h"
27 #include "prefs-utils.h"
28 #include "inkscape.h"
29 #include "snap.h"
30 #include "desktop-affine.h"
31 #include <style.h>
32 #include "desktop.h"
33 #include "desktop-handles.h"
34 #include "sp-namedview.h"
36 #include "sp-pattern.h"
37 #include "sp-path.h"
39 #include <glibmm/i18n.h>
41 #include "object-edit.h"
43 #include <libnr/nr-scale-ops.h>
46 #include "xml/repr.h"
48 #include "isnan.h"
50 #define sp_round(v,m) (((v) < 0.0) ? ((ceil((v) / (m) - 0.5)) * (m)) : ((floor((v) / (m) + 0.5)) * (m)))
52 static SPKnotHolder *sp_rect_knot_holder(SPItem *item, SPDesktop *desktop);
53 //static
54 SPKnotHolder *sp_3dbox_knot_holder(SPItem *item, SPDesktop *desktop);
55 static SPKnotHolder *sp_arc_knot_holder(SPItem *item, SPDesktop *desktop);
56 static SPKnotHolder *sp_star_knot_holder(SPItem *item, SPDesktop *desktop);
57 static SPKnotHolder *sp_spiral_knot_holder(SPItem *item, SPDesktop *desktop);
58 static SPKnotHolder *sp_offset_knot_holder(SPItem *item, SPDesktop *desktop);
59 static SPKnotHolder *sp_misc_knot_holder(SPItem *item, SPDesktop *desktop);
60 static SPKnotHolder *sp_flowtext_knot_holder(SPItem *item, SPDesktop *desktop);
61 static void sp_pat_knot_holder(SPItem *item, SPKnotHolder *knot_holder);
63 SPKnotHolder *
64 sp_item_knot_holder(SPItem *item, SPDesktop *desktop)
65 {
66 if (SP_IS_RECT(item)) {
67 return sp_rect_knot_holder(item, desktop);
68 } else if (SP_IS_3DBOX(item)) {
69 return sp_3dbox_knot_holder(item, desktop);
70 } else if (SP_IS_ARC(item)) {
71 return sp_arc_knot_holder(item, desktop);
72 } else if (SP_IS_STAR(item)) {
73 return sp_star_knot_holder(item, desktop);
74 } else if (SP_IS_SPIRAL(item)) {
75 return sp_spiral_knot_holder(item, desktop);
76 } else if (SP_IS_OFFSET(item)) {
77 return sp_offset_knot_holder(item, desktop);
78 } else if (SP_IS_FLOWTEXT(item) && SP_FLOWTEXT(item)->has_internal_frame()) {
79 return sp_flowtext_knot_holder(item, desktop);
80 } else {
81 return sp_misc_knot_holder(item, desktop);
82 }
84 return NULL;
85 }
88 /* Pattern manipulation */
90 static gdouble sp_pattern_extract_theta(SPPattern *pat, gdouble scale)
91 {
92 gdouble theta = asin(pat->patternTransform[1] / scale);
93 if (pat->patternTransform[0] < 0) theta = M_PI - theta ;
94 return theta;
95 }
97 static gdouble sp_pattern_extract_scale(SPPattern *pat)
98 {
99 gdouble s = pat->patternTransform[1];
100 gdouble c = pat->patternTransform[0];
101 gdouble xscale = sqrt(c * c + s * s);
102 return xscale;
103 }
105 static NR::Point sp_pattern_extract_trans(SPPattern const *pat)
106 {
107 return NR::Point(pat->patternTransform[4], pat->patternTransform[5]);
108 }
110 static void
111 sp_pattern_xy_set(SPItem *item, NR::Point const &p, NR::Point const &origin, guint state)
112 {
113 SPPattern *pat = SP_PATTERN(SP_STYLE_FILL_SERVER(SP_OBJECT(item)->style));
115 NR::Point p_snapped = p;
117 if ( state & GDK_CONTROL_MASK ) {
118 if (fabs((p - origin)[NR::X]) > fabs((p - origin)[NR::Y])) {
119 p_snapped[NR::Y] = origin[NR::Y];
120 } else {
121 p_snapped[NR::X] = origin[NR::X];
122 }
123 }
125 if (state) {
126 NR::Point const q = p_snapped - sp_pattern_extract_trans(pat);
127 sp_item_adjust_pattern(item, NR::Matrix(NR::translate(q)));
128 }
130 item->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
131 }
134 static NR::Point sp_pattern_xy_get(SPItem *item)
135 {
136 SPPattern const *pat = SP_PATTERN(SP_STYLE_FILL_SERVER(SP_OBJECT(item)->style));
137 return sp_pattern_extract_trans(pat);
138 }
140 static NR::Point sp_pattern_angle_get(SPItem *item)
141 {
142 SPPattern *pat = SP_PATTERN(SP_STYLE_FILL_SERVER(SP_OBJECT(item)->style));
144 gdouble x = (pattern_width(pat)*0.5);
145 gdouble y = 0;
146 NR::Point delta = NR::Point(x,y);
147 gdouble scale = sp_pattern_extract_scale(pat);
148 gdouble theta = sp_pattern_extract_theta(pat, scale);
149 delta = delta * NR::Matrix(NR::rotate(theta))*NR::Matrix(NR::scale(scale,scale));
150 delta = delta + sp_pattern_extract_trans(pat);
151 return delta;
152 }
154 static void
155 sp_pattern_angle_set(SPItem *item, NR::Point const &p, NR::Point const &origin, guint state)
156 {
157 int const snaps = prefs_get_int_attribute("options.rotationsnapsperpi", "value", 12);
159 SPPattern *pat = SP_PATTERN(SP_STYLE_FILL_SERVER(SP_OBJECT(item)->style));
161 // get the angle from pattern 0,0 to the cursor pos
162 NR::Point delta = p - sp_pattern_extract_trans(pat);
163 gdouble theta = atan2(delta);
165 if ( state & GDK_CONTROL_MASK ) {
166 theta = sp_round(theta, M_PI/snaps);
167 }
169 // get the scale from the current transform so we can keep it.
170 gdouble scl = sp_pattern_extract_scale(pat);
171 NR::Matrix rot = NR::Matrix(NR::rotate(theta)) * NR::Matrix(NR::scale(scl,scl));
172 NR::Point const t = sp_pattern_extract_trans(pat);
173 rot[4] = t[NR::X];
174 rot[5] = t[NR::Y];
175 sp_item_adjust_pattern(item, rot, true);
176 item->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
177 }
179 static void
180 sp_pattern_scale_set(SPItem *item, NR::Point const &p, NR::Point const &origin, guint state)
181 {
182 SPPattern *pat = SP_PATTERN(SP_STYLE_FILL_SERVER(SP_OBJECT(item)->style));
184 // Get the scale from the position of the knotholder,
185 NR::Point d = p - sp_pattern_extract_trans(pat);
186 gdouble s = NR::L2(d);
187 gdouble pat_x = pattern_width(pat) * 0.5;
188 gdouble pat_y = pattern_height(pat) * 0.5;
189 gdouble pat_h = hypot(pat_x, pat_y);
190 gdouble scl = s / pat_h;
192 // get angle from current transform, (need get current scale first to calculate angle)
193 gdouble oldscale = sp_pattern_extract_scale(pat);
194 gdouble theta = sp_pattern_extract_theta(pat,oldscale);
196 NR::Matrix rot = NR::Matrix(NR::rotate(theta)) * NR::Matrix(NR::scale(scl,scl));
197 NR::Point const t = sp_pattern_extract_trans(pat);
198 rot[4] = t[NR::X];
199 rot[5] = t[NR::Y];
200 sp_item_adjust_pattern(item, rot, true);
201 item->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
202 }
205 static NR::Point sp_pattern_scale_get(SPItem *item)
206 {
207 SPPattern *pat = SP_PATTERN(SP_STYLE_FILL_SERVER(SP_OBJECT(item)->style));
209 gdouble x = pattern_width(pat)*0.5;
210 gdouble y = pattern_height(pat)*0.5;
211 NR::Point delta = NR::Point(x,y);
212 NR::Matrix a = pat->patternTransform;
213 a[4] = 0;
214 a[5] = 0;
215 delta = delta * a;
216 delta = delta + sp_pattern_extract_trans(pat);
217 return delta;
218 }
220 /* SPRect */
222 static NR::Point snap_knot_position(SPItem *item, NR::Point const &p)
223 {
224 SPDesktop const *desktop = inkscape_active_desktop();
225 NR::Matrix const i2d (sp_item_i2d_affine (item));
226 NR::Point s = p * i2d;
227 SnapManager const &m = desktop->namedview->snap_manager;
228 s = m.freeSnap(Inkscape::Snapper::SNAPPOINT_NODE, s, item).getPoint();
229 return s * i2d.inverse();
230 }
232 static NR::Point sp_rect_rx_get(SPItem *item)
233 {
234 SPRect *rect = SP_RECT(item);
236 return NR::Point(rect->x.computed + rect->width.computed - rect->rx.computed, rect->y.computed);
237 }
239 static void sp_rect_rx_set(SPItem *item, NR::Point const &p, NR::Point const &origin, guint state)
240 {
241 SPRect *rect = SP_RECT(item);
243 //In general we cannot just snap this radius to an arbitrary point, as we have only a single
244 //degree of freedom. For snapping to an arbitrary point we need two DOF. If we're going to snap
245 //the radius then we should have a constrained snap. snap_knot_position() is unconstrained
247 if (state & GDK_CONTROL_MASK) {
248 gdouble temp = MIN(rect->height.computed, rect->width.computed) / 2.0;
249 rect->rx.computed = rect->ry.computed = CLAMP(rect->x.computed + rect->width.computed - p[NR::X], 0.0, temp);
250 rect->rx._set = rect->ry._set = true;
252 } else {
253 rect->rx.computed = CLAMP(rect->x.computed + rect->width.computed - p[NR::X], 0.0, rect->width.computed / 2.0);
254 rect->rx._set = true;
255 }
257 ((SPObject*)rect)->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
258 }
261 static NR::Point sp_rect_ry_get(SPItem *item)
262 {
263 SPRect *rect = SP_RECT(item);
265 return NR::Point(rect->x.computed + rect->width.computed, rect->y.computed + rect->ry.computed);
266 }
268 static void sp_rect_ry_set(SPItem *item, NR::Point const &p, NR::Point const &origin, guint state)
269 {
270 SPRect *rect = SP_RECT(item);
272 //In general we cannot just snap this radius to an arbitrary point, as we have only a single
273 //degree of freedom. For snapping to an arbitrary point we need two DOF. If we're going to snap
274 //the radius then we should have a constrained snap. snap_knot_position() is unconstrained
276 if (state & GDK_CONTROL_MASK) {
277 gdouble temp = MIN(rect->height.computed, rect->width.computed) / 2.0;
278 rect->rx.computed = rect->ry.computed = CLAMP(p[NR::Y] - rect->y.computed, 0.0, temp);
279 rect->ry._set = rect->rx._set = true;
280 } else {
281 if (!rect->rx._set || rect->rx.computed == 0) {
282 rect->ry.computed = CLAMP(p[NR::Y] - rect->y.computed,
283 0.0,
284 MIN(rect->height.computed / 2.0, rect->width.computed / 2.0));
285 } else {
286 rect->ry.computed = CLAMP(p[NR::Y] - rect->y.computed,
287 0.0,
288 rect->height.computed / 2.0);
289 }
291 rect->ry._set = true;
292 }
294 ((SPObject *)rect)->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
295 }
297 /**
298 * Remove rounding from a rectangle.
299 */
300 static void rect_remove_rounding(SPRect *rect)
301 {
302 SP_OBJECT_REPR(rect)->setAttribute("rx", NULL);
303 SP_OBJECT_REPR(rect)->setAttribute("ry", NULL);
304 }
306 /**
307 * Called when the horizontal rounding radius knot is clicked.
308 */
309 static void sp_rect_rx_knot_click(SPItem *item, guint state)
310 {
311 SPRect *rect = SP_RECT(item);
313 if (state & GDK_SHIFT_MASK) {
314 rect_remove_rounding(rect);
315 } else if (state & GDK_CONTROL_MASK) {
316 /* Ctrl-click sets the vertical rounding to be the same as the horizontal */
317 SP_OBJECT_REPR(rect)->setAttribute("ry", SP_OBJECT_REPR(rect)->attribute("rx"));
318 }
319 }
321 /**
322 * Called when the vertical rounding radius knot is clicked.
323 */
324 static void sp_rect_ry_knot_click(SPItem *item, guint state)
325 {
326 SPRect *rect = SP_RECT(item);
328 if (state & GDK_SHIFT_MASK) {
329 rect_remove_rounding(rect);
330 } else if (state & GDK_CONTROL_MASK) {
331 /* Ctrl-click sets the vertical rounding to be the same as the horizontal */
332 SP_OBJECT_REPR(rect)->setAttribute("rx", SP_OBJECT_REPR(rect)->attribute("ry"));
333 }
334 }
336 #define SGN(x) ((x)>0?1:((x)<0?-1:0))
338 static void sp_rect_clamp_radii(SPRect *rect)
339 {
340 // clamp rounding radii so that they do not exceed width/height
341 if (2 * rect->rx.computed > rect->width.computed) {
342 rect->rx.computed = 0.5 * rect->width.computed;
343 rect->rx._set = true;
344 }
345 if (2 * rect->ry.computed > rect->height.computed) {
346 rect->ry.computed = 0.5 * rect->height.computed;
347 rect->ry._set = true;
348 }
349 }
351 static NR::Point sp_rect_wh_get(SPItem *item)
352 {
353 SPRect *rect = SP_RECT(item);
355 return NR::Point(rect->x.computed + rect->width.computed, rect->y.computed + rect->height.computed);
356 }
358 static void sp_rect_wh_set_internal(SPRect *rect, NR::Point const &p, NR::Point const &origin, guint state)
359 {
360 NR::Point const s = snap_knot_position(rect, p);
362 if (state & GDK_CONTROL_MASK) {
363 // original width/height when drag started
364 gdouble const w_orig = (origin[NR::X] - rect->x.computed);
365 gdouble const h_orig = (origin[NR::Y] - rect->y.computed);
367 //original ratio
368 gdouble const ratio = (w_orig / h_orig);
370 // mouse displacement since drag started
371 gdouble const minx = s[NR::X] - origin[NR::X];
372 gdouble const miny = s[NR::Y] - origin[NR::Y];
374 if (fabs(minx) > fabs(miny)) {
376 // snap to horizontal or diagonal
377 rect->width.computed = MAX(w_orig + minx, 0);
378 if (minx != 0 && fabs(miny/minx) > 0.5 * 1/ratio && (SGN(minx) == SGN(miny))) {
379 // closer to the diagonal and in same-sign quarters, change both using ratio
380 rect->height.computed = MAX(h_orig + minx / ratio, 0);
381 } else {
382 // closer to the horizontal, change only width, height is h_orig
383 rect->height.computed = MAX(h_orig, 0);
384 }
386 } else {
387 // snap to vertical or diagonal
388 rect->height.computed = MAX(h_orig + miny, 0);
389 if (miny != 0 && fabs(minx/miny) > 0.5 * ratio && (SGN(minx) == SGN(miny))) {
390 // closer to the diagonal and in same-sign quarters, change both using ratio
391 rect->width.computed = MAX(w_orig + miny * ratio, 0);
392 } else {
393 // closer to the vertical, change only height, width is w_orig
394 rect->width.computed = MAX(w_orig, 0);
395 }
396 }
398 rect->width._set = rect->height._set = true;
400 } else {
401 // move freely
402 rect->width.computed = MAX(s[NR::X] - rect->x.computed, 0);
403 rect->height.computed = MAX(s[NR::Y] - rect->y.computed, 0);
404 rect->width._set = rect->height._set = true;
405 }
407 sp_rect_clamp_radii(rect);
409 ((SPObject *)rect)->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
410 }
412 static void sp_rect_wh_set(SPItem *item, NR::Point const &p, NR::Point const &origin, guint state)
413 {
414 SPRect *rect = SP_RECT(item);
416 sp_rect_wh_set_internal(rect, p, origin, state);
417 }
419 static NR::Point sp_rect_xy_get(SPItem *item)
420 {
421 SPRect *rect = SP_RECT(item);
423 return NR::Point(rect->x.computed, rect->y.computed);
424 }
426 static void sp_rect_xy_set(SPItem *item, NR::Point const &p, NR::Point const &origin, guint state)
427 {
428 SPRect *rect = SP_RECT(item);
430 // opposite corner (unmoved)
431 gdouble opposite_x = (rect->x.computed + rect->width.computed);
432 gdouble opposite_y = (rect->y.computed + rect->height.computed);
434 // original width/height when drag started
435 gdouble w_orig = opposite_x - origin[NR::X];
436 gdouble h_orig = opposite_y - origin[NR::Y];
438 NR::Point const s = snap_knot_position(rect, p);
440 // mouse displacement since drag started
441 gdouble minx = s[NR::X] - origin[NR::X];
442 gdouble miny = s[NR::Y] - origin[NR::Y];
444 if (state & GDK_CONTROL_MASK) {
445 //original ratio
446 gdouble ratio = (w_orig / h_orig);
448 if (fabs(minx) > fabs(miny)) {
450 // snap to horizontal or diagonal
451 rect->x.computed = MIN(s[NR::X], opposite_x);
452 rect->width.computed = MAX(w_orig - minx, 0);
453 if (minx != 0 && fabs(miny/minx) > 0.5 * 1/ratio && (SGN(minx) == SGN(miny))) {
454 // closer to the diagonal and in same-sign quarters, change both using ratio
455 rect->y.computed = MIN(origin[NR::Y] + minx / ratio, opposite_y);
456 rect->height.computed = MAX(h_orig - minx / ratio, 0);
457 } else {
458 // closer to the horizontal, change only width, height is h_orig
459 rect->y.computed = MIN(origin[NR::Y], opposite_y);
460 rect->height.computed = MAX(h_orig, 0);
461 }
463 } else {
465 // snap to vertical or diagonal
466 rect->y.computed = MIN(s[NR::Y], opposite_y);
467 rect->height.computed = MAX(h_orig - miny, 0);
468 if (miny != 0 && fabs(minx/miny) > 0.5 *ratio && (SGN(minx) == SGN(miny))) {
469 // closer to the diagonal and in same-sign quarters, change both using ratio
470 rect->x.computed = MIN(origin[NR::X] + miny * ratio, opposite_x);
471 rect->width.computed = MAX(w_orig - miny * ratio, 0);
472 } else {
473 // closer to the vertical, change only height, width is w_orig
474 rect->x.computed = MIN(origin[NR::X], opposite_x);
475 rect->width.computed = MAX(w_orig, 0);
476 }
478 }
480 rect->width._set = rect->height._set = rect->x._set = rect->y._set = true;
482 } else {
483 // move freely
484 rect->x.computed = MIN(s[NR::X], opposite_x);
485 rect->width.computed = MAX(w_orig - minx, 0);
486 rect->y.computed = MIN(s[NR::Y], opposite_y);
487 rect->height.computed = MAX(h_orig - miny, 0);
488 rect->width._set = rect->height._set = rect->x._set = rect->y._set = true;
489 }
491 sp_rect_clamp_radii(rect);
493 ((SPObject *)rect)->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
494 }
496 static SPKnotHolder *sp_rect_knot_holder(SPItem *item, SPDesktop *desktop)
497 {
498 SPKnotHolder *knot_holder = sp_knot_holder_new(desktop, item, NULL);
500 sp_knot_holder_add_full(
501 knot_holder, sp_rect_rx_set, sp_rect_rx_get, sp_rect_rx_knot_click,
502 SP_KNOT_SHAPE_CIRCLE, SP_KNOT_MODE_XOR,
503 _("Adjust the <b>horizontal rounding</b> radius; with <b>Ctrl</b> to make the vertical "
504 "radius the same"));
506 sp_knot_holder_add_full(
507 knot_holder, sp_rect_ry_set, sp_rect_ry_get, sp_rect_ry_knot_click,
508 SP_KNOT_SHAPE_CIRCLE, SP_KNOT_MODE_XOR,
509 _("Adjust the <b>vertical rounding</b> radius; with <b>Ctrl</b> to make the horizontal "
510 "radius the same")
511 );
513 sp_knot_holder_add_full(
514 knot_holder, sp_rect_wh_set, sp_rect_wh_get, NULL,
515 SP_KNOT_SHAPE_SQUARE, SP_KNOT_MODE_XOR,
516 _("Adjust the <b>width and height</b> of the rectangle; with <b>Ctrl</b> to lock ratio "
517 "or stretch in one dimension only")
518 );
520 sp_knot_holder_add_full(
521 knot_holder, sp_rect_xy_set, sp_rect_xy_get, NULL,
522 SP_KNOT_SHAPE_SQUARE, SP_KNOT_MODE_XOR,
523 _("Adjust the <b>width and height</b> of the rectangle; with <b>Ctrl</b> to lock ratio "
524 "or stretch in one dimension only")
525 );
527 sp_pat_knot_holder(item, knot_holder);
528 return knot_holder;
529 }
531 /* 3D Box */
533 static inline Box3D::Axis movement_axis_of_3dbox_corner (guint corner, guint state)
534 {
535 // this function has the purpose to simplify a change in the resizing behaviour of boxes
536 switch (corner) {
537 case 0:
538 case 1:
539 case 2:
540 case 3:
541 return ((state & GDK_SHIFT_MASK) ? Box3D::Z : Box3D::XY);
542 case 4:
543 case 5:
544 case 6:
545 case 7:
546 return ((state & GDK_SHIFT_MASK) ? Box3D::XY : Box3D::Z);
547 }
548 return Box3D::NONE;
549 }
551 /*
552 * To keep the snappoint from jumping randomly between the two lines when the mouse pointer is close to
553 * their intersection, we remember the last snapped line and keep snapping to this specific line as long
554 * as the distance from the intersection to the mouse pointer is less than remember_snap_threshold.
555 */
557 // Should we make the threshold settable in the preferences?
558 static double remember_snap_threshold = 20;
559 static guint remember_snap_index = 0;
561 static NR::Point snap_knot_position_3dbox (SP3DBox *box, guint corner, Box3D::Axis direction, NR::Point const &origin, NR::Point const &p, guint state)
562 {
563 SPDesktop * desktop = inkscape_active_desktop();
564 Box3D::Perspective3D *persp = sp_desktop_document (desktop)->get_persp_of_box (box);
566 g_return_val_if_fail (!is_single_axis_direction (direction), p);
568 Box3D::Axis axis1 = Box3D::extract_first_axis_direction (direction);
569 Box3D::Axis axis2 = Box3D::extract_second_axis_direction (direction);
571 NR::Matrix const i2d (sp_item_i2d_affine (SP_ITEM (box)));
572 NR::Point origin_dt = origin * i2d;
573 NR::Point p_dt = p * i2d;
575 Box3D::PerspectiveLine pl1 (origin_dt, axis1, persp);
576 Box3D::PerspectiveLine pl2 (origin_dt, axis2, persp);
577 Box3D::Line diag1 (origin_dt, box->corners[corner ^ Box3D::XY]);
579 int num_snap_lines = 3;
580 NR::Point snap_pts[num_snap_lines];
582 snap_pts[0] = pl1.closest_to (p_dt);
583 snap_pts[1] = pl2.closest_to (p_dt);
584 snap_pts[2] = diag1.closest_to (p_dt);
586 gdouble const zoom = desktop->current_zoom();
588 double snap_dists[num_snap_lines];
590 for (int i = 0; i < num_snap_lines; ++i) {
591 snap_dists[i] = NR::L2 (snap_pts[i] - p_dt) * zoom;
592 }
594 bool within_tolerance = true;
595 for (int i = 0; i < num_snap_lines; ++i) {
596 if (snap_dists[i] > remember_snap_threshold) {
597 within_tolerance = false;
598 break;
599 }
600 }
602 int snap_index = -1;
603 double snap_dist = NR_HUGE;
604 for (int i = 0; i < num_snap_lines; ++i) {
605 if (snap_dists[i] < snap_dist) {
606 snap_index = i;
607 snap_dist = snap_dists[i];
608 }
609 }
611 if (within_tolerance) {
612 return snap_pts[remember_snap_index] * i2d.inverse();
613 } else {
614 remember_snap_index = snap_index;
615 return snap_pts[snap_index] * i2d.inverse();
616 }
617 }
619 static NR::Point sp_3dbox_knot_get(SPItem *item, guint knot_id)
620 {
621 g_assert(item != NULL);
622 SP3DBox *box = SP_3DBOX(item);
624 NR::Matrix const i2d (sp_item_i2d_affine (item));
625 return sp_3dbox_get_corner(box, knot_id) * i2d;
626 }
628 static void sp_3dbox_knot_set(SPItem *item, guint knot_id, NR::Point const &new_pos, NR::Point const &origin, guint state)
629 {
630 g_assert(item != NULL);
631 SP3DBox *box = SP_3DBOX(item);
633 NR::Matrix const i2d (sp_item_i2d_affine (item));
634 Box3D::Axis direction = movement_axis_of_3dbox_corner (knot_id, state);
635 if ((state & GDK_CONTROL_MASK) && !is_single_axis_direction (direction)) {
636 // snap if Ctrl is pressed and movement isn't already constrained to a single axis
637 NR::Point const s = snap_knot_position_3dbox (box, knot_id, direction, origin, new_pos, state);
638 sp_3dbox_move_corner_in_Z_direction (box, knot_id, s * i2d, false);
639 } else {
640 if (direction == Box3D::Z) {
641 sp_3dbox_move_corner_in_Z_direction (box, knot_id, new_pos * i2d, true);
642 } else {
643 sp_3dbox_move_corner_in_Z_direction (box, knot_id, new_pos * i2d, false);
644 }
645 }
646 sp_3dbox_update_curves (box);
647 sp_3dbox_set_ratios (box);
648 sp_3dbox_update_perspective_lines ();
649 sp_3dbox_set_z_orders (box);
650 }
652 static void sp_3dbox_knot_center_set(SPItem *item, NR::Point const &new_pos, NR::Point const &origin, guint state)
653 {
654 NR::Matrix const i2d (sp_item_i2d_affine (item));
655 if (state & GDK_SHIFT_MASK) {
656 sp_3dbox_recompute_Z_corners_from_new_center (SP_3DBOX (item), new_pos * i2d);
657 } else {
658 sp_3dbox_recompute_XY_corners_from_new_center (SP_3DBOX (item), new_pos * i2d);
659 }
661 sp_3dbox_update_curves (SP_3DBOX(item));
662 }
664 static NR::Point sp_3dbox_knot_center_get(SPItem *item)
665 {
666 NR::Maybe<NR::Point> center = sp_3dbox_get_center(SP_3DBOX(item));
667 if (!center) return NR::Point (0, 0);
668 NR::Matrix const i2d (sp_item_i2d_affine (item));
669 return (*center) * i2d;
670 }
672 static void sp_3dbox_knot0_set(SPItem *item, NR::Point const &new_pos, NR::Point const &origin, guint state)
673 {
674 sp_3dbox_knot_set(item, 0, new_pos, origin, state);
675 }
677 static void sp_3dbox_knot1_set(SPItem *item, NR::Point const &new_pos, NR::Point const &origin, guint state)
678 {
679 sp_3dbox_knot_set(item, 1, new_pos, origin, state);
680 }
682 static void sp_3dbox_knot2_set(SPItem *item, NR::Point const &new_pos, NR::Point const &origin, guint state)
683 {
684 sp_3dbox_knot_set(item, 2, new_pos, origin, state);
685 }
687 static void sp_3dbox_knot3_set(SPItem *item, NR::Point const &new_pos, NR::Point const &origin, guint state)
688 {
689 sp_3dbox_knot_set(item, 3, new_pos, origin, state);
690 }
692 static void sp_3dbox_knot4_set(SPItem *item, NR::Point const &new_pos, NR::Point const &origin, guint state)
693 {
694 sp_3dbox_knot_set(item, 4, new_pos, origin, state);
695 }
697 static void sp_3dbox_knot5_set(SPItem *item, NR::Point const &new_pos, NR::Point const &origin, guint state)
698 {
699 sp_3dbox_knot_set(item, 5, new_pos, origin, state);
700 }
702 static void sp_3dbox_knot6_set(SPItem *item, NR::Point const &new_pos, NR::Point const &origin, guint state)
703 {
704 sp_3dbox_knot_set(item, 6, new_pos, origin, state);
705 }
707 static void sp_3dbox_knot7_set(SPItem *item, NR::Point const &new_pos, NR::Point const &origin, guint state)
708 {
709 sp_3dbox_knot_set(item, 7, new_pos, origin, state);
710 }
712 static NR::Point sp_3dbox_knot0_get(SPItem *item)
713 {
714 return sp_3dbox_knot_get(item, 0);
715 }
717 static NR::Point sp_3dbox_knot1_get(SPItem *item)
718 {
719 return sp_3dbox_knot_get(item, 1);
720 }
722 static NR::Point sp_3dbox_knot2_get(SPItem *item)
723 {
724 return sp_3dbox_knot_get(item, 2);
725 }
727 static NR::Point sp_3dbox_knot3_get(SPItem *item)
728 {
729 return sp_3dbox_knot_get(item, 3);
730 }
732 static NR::Point sp_3dbox_knot4_get(SPItem *item)
733 {
734 return sp_3dbox_knot_get(item, 4);
735 }
737 static NR::Point sp_3dbox_knot5_get(SPItem *item)
738 {
739 return sp_3dbox_knot_get(item, 5);
740 }
742 static NR::Point sp_3dbox_knot6_get(SPItem *item)
743 {
744 return sp_3dbox_knot_get(item, 6);
745 }
747 static NR::Point sp_3dbox_knot7_get(SPItem *item)
748 {
749 return sp_3dbox_knot_get(item, 7);
750 }
753 //static
754 SPKnotHolder *
755 sp_3dbox_knot_holder(SPItem *item, SPDesktop *desktop)
756 {
757 g_assert(item != NULL);
758 SPKnotHolder *knot_holder = sp_knot_holder_new(desktop, item, NULL);
760 sp_knot_holder_add(knot_holder, sp_3dbox_knot0_set, sp_3dbox_knot0_get, NULL,
761 _("Resize box in X/Y direction; with <b>Shift</b> along the Z axis; with <b>Ctrl</b> to constrain to the directions of edges or diagonals"));
762 sp_knot_holder_add(knot_holder, sp_3dbox_knot1_set, sp_3dbox_knot1_get, NULL,
763 _("Resize box in X/Y direction; with <b>Shift</b> along the Z axis; with <b>Ctrl</b> to constrain to the directions of edges or diagonals"));
764 sp_knot_holder_add(knot_holder, sp_3dbox_knot2_set, sp_3dbox_knot2_get, NULL,
765 _("Resize box in X/Y direction; with <b>Shift</b> along the Z axis; with <b>Ctrl</b> to constrain to the directions of edges or diagonals"));
766 sp_knot_holder_add(knot_holder, sp_3dbox_knot3_set, sp_3dbox_knot3_get, NULL,
767 _("Resize box in X/Y direction; with <b>Shift</b> along the Z axis; with <b>Ctrl</b> to constrain to the directions of edges or diagonals"));
768 sp_knot_holder_add(knot_holder, sp_3dbox_knot4_set, sp_3dbox_knot4_get, NULL,
769 _("Resize box along the Z axis; with <b>Shift</b> in X/Y direction; with <b>Ctrl</b> to constrain to the directions of edges or diagonals"));
770 sp_knot_holder_add(knot_holder, sp_3dbox_knot5_set, sp_3dbox_knot5_get, NULL,
771 _("Resize box along the Z axis; with <b>Shift</b> in X/Y direction; with <b>Ctrl</b> to constrain to the directions of edges or diagonals"));
772 sp_knot_holder_add(knot_holder, sp_3dbox_knot6_set, sp_3dbox_knot6_get, NULL,
773 _("Resize box along the Z axis; with <b>Shift</b> in X/Y direction; with <b>Ctrl</b> to constrain to the directions of edges or diagonals"));
774 sp_knot_holder_add(knot_holder, sp_3dbox_knot7_set, sp_3dbox_knot7_get, NULL,
775 _("Resize box along the Z axis; with <b>Shift</b> in X/Y direction; with <b>Ctrl</b> to constrain to the directions of edges or diagonals"));
777 // center dragging
778 sp_knot_holder_add_full(knot_holder, sp_3dbox_knot_center_set, sp_3dbox_knot_center_get, NULL,
779 SP_KNOT_SHAPE_CROSS, SP_KNOT_MODE_XOR,_("Move the box in perspective."));
781 sp_pat_knot_holder(item, knot_holder);
783 return knot_holder;
784 }
786 /* SPArc */
788 /*
789 * return values:
790 * 1 : inside
791 * 0 : on the curves
792 * -1 : outside
793 */
794 static gint
795 sp_genericellipse_side(SPGenericEllipse *ellipse, NR::Point const &p)
796 {
797 gdouble dx = (p[NR::X] - ellipse->cx.computed) / ellipse->rx.computed;
798 gdouble dy = (p[NR::Y] - ellipse->cy.computed) / ellipse->ry.computed;
800 gdouble s = dx * dx + dy * dy;
801 if (s < 1.0) return 1;
802 if (s > 1.0) return -1;
803 return 0;
804 }
806 static void
807 sp_arc_start_set(SPItem *item, NR::Point const &p, NR::Point const &origin, guint state)
808 {
809 int snaps = prefs_get_int_attribute("options.rotationsnapsperpi", "value", 12);
811 SPGenericEllipse *ge = SP_GENERICELLIPSE(item);
812 SPArc *arc = SP_ARC(item);
814 ge->closed = (sp_genericellipse_side(ge, p) == -1) ? TRUE : FALSE;
816 NR::Point delta = p - NR::Point(ge->cx.computed, ge->cy.computed);
817 NR::scale sc(ge->rx.computed, ge->ry.computed);
818 ge->start = atan2(delta * sc.inverse());
819 if ( ( state & GDK_CONTROL_MASK )
820 && snaps )
821 {
822 ge->start = sp_round(ge->start, M_PI/snaps);
823 }
824 sp_genericellipse_normalize(ge);
825 ((SPObject *)arc)->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
826 }
828 static NR::Point sp_arc_start_get(SPItem *item)
829 {
830 SPGenericEllipse *ge = SP_GENERICELLIPSE(item);
831 SPArc *arc = SP_ARC(item);
833 return sp_arc_get_xy(arc, ge->start);
834 }
836 static void
837 sp_arc_end_set(SPItem *item, NR::Point const &p, NR::Point const &origin, guint state)
838 {
839 int snaps = prefs_get_int_attribute("options.rotationsnapsperpi", "value", 12);
841 SPGenericEllipse *ge = SP_GENERICELLIPSE(item);
842 SPArc *arc = SP_ARC(item);
844 ge->closed = (sp_genericellipse_side(ge, p) == -1) ? TRUE : FALSE;
846 NR::Point delta = p - NR::Point(ge->cx.computed, ge->cy.computed);
847 NR::scale sc(ge->rx.computed, ge->ry.computed);
848 ge->end = atan2(delta * sc.inverse());
849 if ( ( state & GDK_CONTROL_MASK )
850 && snaps )
851 {
852 ge->end = sp_round(ge->end, M_PI/snaps);
853 }
854 sp_genericellipse_normalize(ge);
855 ((SPObject *)arc)->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
856 }
858 static NR::Point sp_arc_end_get(SPItem *item)
859 {
860 SPGenericEllipse *ge = SP_GENERICELLIPSE(item);
861 SPArc *arc = SP_ARC(item);
863 return sp_arc_get_xy(arc, ge->end);
864 }
866 static void
867 sp_arc_startend_click(SPItem *item, guint state)
868 {
869 SPGenericEllipse *ge = SP_GENERICELLIPSE(item);
871 if (state & GDK_SHIFT_MASK) {
872 ge->end = ge->start = 0;
873 ((SPObject *)ge)->updateRepr();
874 }
875 }
878 static void
879 sp_arc_rx_set(SPItem *item, NR::Point const &p, NR::Point const &origin, guint state)
880 {
881 SPGenericEllipse *ge = SP_GENERICELLIPSE(item);
882 SPArc *arc = SP_ARC(item);
884 NR::Point const s = snap_knot_position(arc, p);
886 ge->rx.computed = fabs( ge->cx.computed - s[NR::X] );
888 if ( state & GDK_CONTROL_MASK ) {
889 ge->ry.computed = ge->rx.computed;
890 }
892 ((SPObject *)arc)->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
893 }
895 static NR::Point sp_arc_rx_get(SPItem *item)
896 {
897 SPGenericEllipse *ge = SP_GENERICELLIPSE(item);
899 return (NR::Point(ge->cx.computed, ge->cy.computed) - NR::Point(ge->rx.computed, 0));
900 }
902 static void
903 sp_arc_ry_set(SPItem *item, NR::Point const &p, NR::Point const &origin, guint state)
904 {
905 SPGenericEllipse *ge = SP_GENERICELLIPSE(item);
906 SPArc *arc = SP_ARC(item);
908 NR::Point const s = snap_knot_position(arc, p);
910 ge->ry.computed = fabs( ge->cy.computed - s[NR::Y] );
912 if ( state & GDK_CONTROL_MASK ) {
913 ge->rx.computed = ge->ry.computed;
914 }
916 ((SPObject *)arc)->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
917 }
919 static NR::Point sp_arc_ry_get(SPItem *item)
920 {
921 SPGenericEllipse *ge = SP_GENERICELLIPSE(item);
923 return (NR::Point(ge->cx.computed, ge->cy.computed) - NR::Point(0, ge->ry.computed));
924 }
926 static void
927 sp_arc_rx_click(SPItem *item, guint state)
928 {
929 SPGenericEllipse *ge = SP_GENERICELLIPSE(item);
931 if (state & GDK_CONTROL_MASK) {
932 ge->ry.computed = ge->rx.computed;
933 ((SPObject *)ge)->updateRepr();
934 }
935 }
937 static void
938 sp_arc_ry_click(SPItem *item, guint state)
939 {
940 SPGenericEllipse *ge = SP_GENERICELLIPSE(item);
942 if (state & GDK_CONTROL_MASK) {
943 ge->rx.computed = ge->ry.computed;
944 ((SPObject *)ge)->updateRepr();
945 }
946 }
948 static SPKnotHolder *
949 sp_arc_knot_holder(SPItem *item, SPDesktop *desktop)
950 {
951 SPKnotHolder *knot_holder = sp_knot_holder_new(desktop, item, NULL);
953 sp_knot_holder_add_full(knot_holder, sp_arc_rx_set, sp_arc_rx_get, sp_arc_rx_click,
954 SP_KNOT_SHAPE_SQUARE, SP_KNOT_MODE_XOR,
955 _("Adjust ellipse <b>width</b>, with <b>Ctrl</b> to make circle"));
956 sp_knot_holder_add_full(knot_holder, sp_arc_ry_set, sp_arc_ry_get, sp_arc_ry_click,
957 SP_KNOT_SHAPE_SQUARE, SP_KNOT_MODE_XOR,
958 _("Adjust ellipse <b>height</b>, with <b>Ctrl</b> to make circle"));
959 sp_knot_holder_add_full(knot_holder, sp_arc_start_set, sp_arc_start_get, sp_arc_startend_click,
960 SP_KNOT_SHAPE_CIRCLE, SP_KNOT_MODE_XOR,
961 _("Position the <b>start point</b> of the arc or segment; with <b>Ctrl</b> to snap angle; drag <b>inside</b> the ellipse for arc, <b>outside</b> for segment"));
962 sp_knot_holder_add_full(knot_holder, sp_arc_end_set, sp_arc_end_get, sp_arc_startend_click,
963 SP_KNOT_SHAPE_CIRCLE, SP_KNOT_MODE_XOR,
964 _("Position the <b>end point</b> of the arc or segment; with <b>Ctrl</b> to snap angle; drag <b>inside</b> the ellipse for arc, <b>outside</b> for segment"));
966 sp_pat_knot_holder(item, knot_holder);
968 return knot_holder;
969 }
971 /* SPStar */
973 static void
974 sp_star_knot1_set(SPItem *item, NR::Point const &p, NR::Point const &origin, guint state)
975 {
976 SPStar *star = SP_STAR(item);
978 NR::Point const s = snap_knot_position(star, p);
980 NR::Point d = s - star->center;
982 double arg1 = atan2(d);
983 double darg1 = arg1 - star->arg[0];
985 if (state & GDK_MOD1_MASK) {
986 star->randomized = darg1/(star->arg[0] - star->arg[1]);
987 } else if (state & GDK_SHIFT_MASK) {
988 star->rounded = darg1/(star->arg[0] - star->arg[1]);
989 } else if (state & GDK_CONTROL_MASK) {
990 star->r[0] = L2(d);
991 } else {
992 star->r[0] = L2(d);
993 star->arg[0] = arg1;
994 star->arg[1] += darg1;
995 }
996 ((SPObject *)star)->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
997 }
999 static void
1000 sp_star_knot2_set(SPItem *item, NR::Point const &p, NR::Point const &origin, guint state)
1001 {
1002 SPStar *star = SP_STAR(item);
1004 NR::Point const s = snap_knot_position(star, p);
1006 if (star->flatsided == false) {
1007 NR::Point d = s - star->center;
1009 double arg1 = atan2(d);
1010 double darg1 = arg1 - star->arg[1];
1012 if (state & GDK_MOD1_MASK) {
1013 star->randomized = darg1/(star->arg[0] - star->arg[1]);
1014 } else if (state & GDK_SHIFT_MASK) {
1015 star->rounded = fabs(darg1/(star->arg[0] - star->arg[1]));
1016 } else if (state & GDK_CONTROL_MASK) {
1017 star->r[1] = L2(d);
1018 star->arg[1] = star->arg[0] + M_PI / star->sides;
1019 }
1020 else {
1021 star->r[1] = L2(d);
1022 star->arg[1] = atan2(d);
1023 }
1024 ((SPObject *)star)->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
1025 }
1026 }
1028 static NR::Point sp_star_knot1_get(SPItem *item)
1029 {
1030 g_assert(item != NULL);
1032 SPStar *star = SP_STAR(item);
1034 return sp_star_get_xy(star, SP_STAR_POINT_KNOT1, 0);
1036 }
1038 static NR::Point sp_star_knot2_get(SPItem *item)
1039 {
1040 g_assert(item != NULL);
1042 SPStar *star = SP_STAR(item);
1044 return sp_star_get_xy(star, SP_STAR_POINT_KNOT2, 0);
1045 }
1047 static void
1048 sp_star_knot_click(SPItem *item, guint state)
1049 {
1050 SPStar *star = SP_STAR(item);
1052 if (state & GDK_MOD1_MASK) {
1053 star->randomized = 0;
1054 ((SPObject *)star)->updateRepr();
1055 } else if (state & GDK_SHIFT_MASK) {
1056 star->rounded = 0;
1057 ((SPObject *)star)->updateRepr();
1058 } else if (state & GDK_CONTROL_MASK) {
1059 star->arg[1] = star->arg[0] + M_PI / star->sides;
1060 ((SPObject *)star)->updateRepr();
1061 }
1062 }
1064 static SPKnotHolder *
1065 sp_star_knot_holder(SPItem *item, SPDesktop *desktop)
1066 {
1067 /* we don't need to get parent knot_holder */
1068 SPKnotHolder *knot_holder = sp_knot_holder_new(desktop, item, NULL);
1069 g_assert(item != NULL);
1071 SPStar *star = SP_STAR(item);
1073 sp_knot_holder_add(knot_holder, sp_star_knot1_set, sp_star_knot1_get, sp_star_knot_click,
1074 _("Adjust the <b>tip radius</b> of the star or polygon; with <b>Shift</b> to round; with <b>Alt</b> to randomize"));
1075 if (star->flatsided == false)
1076 sp_knot_holder_add(knot_holder, sp_star_knot2_set, sp_star_knot2_get, sp_star_knot_click,
1077 _("Adjust the <b>base radius</b> of the star; with <b>Ctrl</b> to keep star rays radial (no skew); with <b>Shift</b> to round; with <b>Alt</b> to randomize"));
1079 sp_pat_knot_holder(item, knot_holder);
1081 return knot_holder;
1082 }
1084 /* SPSpiral */
1086 /*
1087 * set attributes via inner (t=t0) knot point:
1088 * [default] increase/decrease inner point
1089 * [shift] increase/decrease inner and outer arg synchronizely
1090 * [control] constrain inner arg to round per PI/4
1091 */
1092 static void
1093 sp_spiral_inner_set(SPItem *item, NR::Point const &p, NR::Point const &origin, guint state)
1094 {
1095 int snaps = prefs_get_int_attribute("options.rotationsnapsperpi", "value", 12);
1097 SPSpiral *spiral = SP_SPIRAL(item);
1099 gdouble dx = p[NR::X] - spiral->cx;
1100 gdouble dy = p[NR::Y] - spiral->cy;
1102 if (state & GDK_MOD1_MASK) {
1103 // adjust divergence by vertical drag, relative to rad
1104 double new_exp = (spiral->rad + dy)/(spiral->rad);
1105 spiral->exp = new_exp > 0? new_exp : 0;
1106 } else {
1107 // roll/unroll from inside
1108 gdouble arg_t0;
1109 sp_spiral_get_polar(spiral, spiral->t0, NULL, &arg_t0);
1111 gdouble arg_tmp = atan2(dy, dx) - arg_t0;
1112 gdouble arg_t0_new = arg_tmp - floor((arg_tmp+M_PI)/(2.0*M_PI))*2.0*M_PI + arg_t0;
1113 spiral->t0 = (arg_t0_new - spiral->arg) / (2.0*M_PI*spiral->revo);
1115 /* round inner arg per PI/snaps, if CTRL is pressed */
1116 if ( ( state & GDK_CONTROL_MASK )
1117 && ( fabs(spiral->revo) > SP_EPSILON_2 )
1118 && ( snaps != 0 ) ) {
1119 gdouble arg = 2.0*M_PI*spiral->revo*spiral->t0 + spiral->arg;
1120 spiral->t0 = (sp_round(arg, M_PI/snaps) - spiral->arg)/(2.0*M_PI*spiral->revo);
1121 }
1123 spiral->t0 = CLAMP(spiral->t0, 0.0, 0.999);
1124 }
1126 ((SPObject *)spiral)->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
1127 }
1129 /*
1130 * set attributes via outer (t=1) knot point:
1131 * [default] increase/decrease revolution factor
1132 * [control] constrain inner arg to round per PI/4
1133 */
1134 static void
1135 sp_spiral_outer_set(SPItem *item, NR::Point const &p, NR::Point const &origin, guint state)
1136 {
1137 int snaps = prefs_get_int_attribute("options.rotationsnapsperpi", "value", 12);
1139 SPSpiral *spiral = SP_SPIRAL(item);
1141 gdouble dx = p[NR::X] - spiral->cx;
1142 gdouble dy = p[NR::Y] - spiral->cy;
1144 if (state & GDK_SHIFT_MASK) { // rotate without roll/unroll
1145 spiral->arg = atan2(dy, dx) - 2.0*M_PI*spiral->revo;
1146 if (!(state & GDK_MOD1_MASK)) {
1147 // if alt not pressed, change also rad; otherwise it is locked
1148 spiral->rad = MAX(hypot(dx, dy), 0.001);
1149 }
1150 if ( ( state & GDK_CONTROL_MASK )
1151 && snaps ) {
1152 spiral->arg = sp_round(spiral->arg, M_PI/snaps);
1153 }
1154 } else { // roll/unroll
1155 // arg of the spiral outer end
1156 double arg_1;
1157 sp_spiral_get_polar(spiral, 1, NULL, &arg_1);
1159 // its fractional part after the whole turns are subtracted
1160 double arg_r = arg_1 - sp_round(arg_1, 2.0*M_PI);
1162 // arg of the mouse point relative to spiral center
1163 double mouse_angle = atan2(dy, dx);
1164 if (mouse_angle < 0)
1165 mouse_angle += 2*M_PI;
1167 // snap if ctrl
1168 if ( ( state & GDK_CONTROL_MASK ) && snaps ) {
1169 mouse_angle = sp_round(mouse_angle, M_PI/snaps);
1170 }
1172 // by how much we want to rotate the outer point
1173 double diff = mouse_angle - arg_r;
1174 if (diff > M_PI)
1175 diff -= 2*M_PI;
1176 else if (diff < -M_PI)
1177 diff += 2*M_PI;
1179 // calculate the new rad;
1180 // the value of t corresponding to the angle arg_1 + diff:
1181 double t_temp = ((arg_1 + diff) - spiral->arg)/(2*M_PI*spiral->revo);
1182 // the rad at that t:
1183 double rad_new = 0;
1184 if (t_temp > spiral->t0)
1185 sp_spiral_get_polar(spiral, t_temp, &rad_new, NULL);
1187 // change the revo (converting diff from radians to the number of turns)
1188 spiral->revo += diff/(2*M_PI);
1189 if (spiral->revo < 1e-3)
1190 spiral->revo = 1e-3;
1192 // if alt not pressed and the values are sane, change the rad
1193 if (!(state & GDK_MOD1_MASK) && rad_new > 1e-3 && rad_new/spiral->rad < 2) {
1194 // adjust t0 too so that the inner point stays unmoved
1195 double r0;
1196 sp_spiral_get_polar(spiral, spiral->t0, &r0, NULL);
1197 spiral->rad = rad_new;
1198 spiral->t0 = pow(r0 / spiral->rad, 1.0/spiral->exp);
1199 }
1200 if (!isFinite(spiral->t0)) spiral->t0 = 0.0;
1201 spiral->t0 = CLAMP(spiral->t0, 0.0, 0.999);
1202 }
1204 ((SPObject *)spiral)->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
1205 }
1207 static NR::Point sp_spiral_inner_get(SPItem *item)
1208 {
1209 SPSpiral *spiral = SP_SPIRAL(item);
1211 return sp_spiral_get_xy(spiral, spiral->t0);
1212 }
1214 static NR::Point sp_spiral_outer_get(SPItem *item)
1215 {
1216 SPSpiral *spiral = SP_SPIRAL(item);
1218 return sp_spiral_get_xy(spiral, 1.0);
1219 }
1221 static void
1222 sp_spiral_inner_click(SPItem *item, guint state)
1223 {
1224 SPSpiral *spiral = SP_SPIRAL(item);
1226 if (state & GDK_MOD1_MASK) {
1227 spiral->exp = 1;
1228 ((SPObject *)spiral)->updateRepr();
1229 } else if (state & GDK_SHIFT_MASK) {
1230 spiral->t0 = 0;
1231 ((SPObject *)spiral)->updateRepr();
1232 }
1233 }
1235 static SPKnotHolder *
1236 sp_spiral_knot_holder(SPItem *item, SPDesktop *desktop)
1237 {
1238 SPKnotHolder *knot_holder = sp_knot_holder_new(desktop, item, NULL);
1240 sp_knot_holder_add(knot_holder, sp_spiral_inner_set, sp_spiral_inner_get, sp_spiral_inner_click,
1241 _("Roll/unroll the spiral from <b>inside</b>; with <b>Ctrl</b> to snap angle; with <b>Alt</b> to converge/diverge"));
1242 sp_knot_holder_add(knot_holder, sp_spiral_outer_set, sp_spiral_outer_get, NULL,
1243 _("Roll/unroll the spiral from <b>outside</b>; with <b>Ctrl</b> to snap angle; with <b>Shift</b> to scale/rotate"));
1245 sp_pat_knot_holder(item, knot_holder);
1247 return knot_holder;
1248 }
1250 /* SPOffset */
1252 static void
1253 sp_offset_offset_set(SPItem *item, NR::Point const &p, NR::Point const &origin, guint state)
1254 {
1255 SPOffset *offset = SP_OFFSET(item);
1257 offset->rad = sp_offset_distance_to_original(offset, p);
1258 offset->knot = p;
1259 offset->knotSet = true;
1261 ((SPObject *)offset)->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
1262 }
1265 static NR::Point sp_offset_offset_get(SPItem *item)
1266 {
1267 SPOffset *offset = SP_OFFSET(item);
1269 NR::Point np;
1270 sp_offset_top_point(offset,&np);
1271 return np;
1272 }
1274 static SPKnotHolder *
1275 sp_offset_knot_holder(SPItem *item, SPDesktop *desktop)
1276 {
1277 SPKnotHolder *knot_holder = sp_knot_holder_new(desktop, item, NULL);
1279 sp_knot_holder_add(knot_holder, sp_offset_offset_set, sp_offset_offset_get, NULL,
1280 _("Adjust the <b>offset distance</b>"));
1282 sp_pat_knot_holder(item, knot_holder);
1284 return knot_holder;
1285 }
1287 static SPKnotHolder *
1288 sp_misc_knot_holder(SPItem *item, SPDesktop *desktop) // FIXME: eliminate, instead make a pattern-drag similar to gradient-drag
1289 {
1290 if ((SP_OBJECT(item)->style->fill.type == SP_PAINT_TYPE_PAINTSERVER)
1291 && SP_IS_PATTERN(SP_STYLE_FILL_SERVER(SP_OBJECT(item)->style)))
1292 {
1293 SPKnotHolder *knot_holder = sp_knot_holder_new(desktop, item, NULL);
1295 sp_pat_knot_holder(item, knot_holder);
1297 return knot_holder;
1298 }
1299 return NULL;
1300 }
1302 static void
1303 sp_pat_knot_holder(SPItem *item, SPKnotHolder *knot_holder)
1304 {
1305 if ((SP_OBJECT(item)->style->fill.type == SP_PAINT_TYPE_PAINTSERVER)
1306 && SP_IS_PATTERN(SP_STYLE_FILL_SERVER(SP_OBJECT(item)->style)))
1307 {
1308 sp_knot_holder_add_full(knot_holder, sp_pattern_xy_set, sp_pattern_xy_get, NULL, SP_KNOT_SHAPE_CROSS, SP_KNOT_MODE_XOR,
1309 // TRANSLATORS: This refers to the pattern that's inside the object
1310 _("<b>Move</b> the pattern fill inside the object"));
1311 sp_knot_holder_add_full(knot_holder, sp_pattern_scale_set, sp_pattern_scale_get, NULL, SP_KNOT_SHAPE_SQUARE, SP_KNOT_MODE_XOR,
1312 _("<b>Scale</b> the pattern fill uniformly"));
1313 sp_knot_holder_add_full(knot_holder, sp_pattern_angle_set, sp_pattern_angle_get, NULL, SP_KNOT_SHAPE_CIRCLE, SP_KNOT_MODE_XOR,
1314 _("<b>Rotate</b> the pattern fill; with <b>Ctrl</b> to snap angle"));
1315 }
1316 }
1318 static NR::Point sp_flowtext_corner_get(SPItem *item)
1319 {
1320 SPRect *rect = SP_RECT(item);
1322 return NR::Point(rect->x.computed + rect->width.computed, rect->y.computed + rect->height.computed);
1323 }
1325 static void
1326 sp_flowtext_corner_set(SPItem *item, NR::Point const &p, NR::Point const &origin, guint state)
1327 {
1328 SPRect *rect = SP_RECT(item);
1330 sp_rect_wh_set_internal(rect, p, origin, state);
1331 }
1333 static SPKnotHolder *
1334 sp_flowtext_knot_holder(SPItem *item, SPDesktop *desktop)
1335 {
1336 SPKnotHolder *knot_holder = sp_knot_holder_new(desktop, SP_FLOWTEXT(item)->get_frame(NULL), NULL);
1338 sp_knot_holder_add(knot_holder, sp_flowtext_corner_set, sp_flowtext_corner_get, NULL,
1339 _("Drag to resize the <b>flowed text frame</b>"));
1341 return knot_holder;
1342 }
1345 /*
1346 Local Variables:
1347 mode:c++
1348 c-file-style:"stroustrup"
1349 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
1350 indent-tabs-mode:nil
1351 fill-column:99
1352 End:
1353 */
1354 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :