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 "sp-ellipse.h"
22 #include "sp-star.h"
23 #include "sp-spiral.h"
24 #include "sp-offset.h"
25 #include "sp-flowtext.h"
26 #include "prefs-utils.h"
27 #include "inkscape.h"
28 #include "snap.h"
29 #include "desktop-affine.h"
30 #include <style.h>
31 #include "desktop.h"
33 #include "sp-pattern.h"
34 #include "sp-path.h"
36 #include <glibmm/i18n.h>
38 #include "object-edit.h"
40 #include <libnr/nr-scale-ops.h>
43 #include "xml/repr.h"
45 #include "isnan.h"
47 #define sp_round(v,m) (((v) < 0.0) ? ((ceil((v) / (m) - 0.5)) * (m)) : ((floor((v) / (m) + 0.5)) * (m)))
49 static SPKnotHolder *sp_rect_knot_holder(SPItem *item, SPDesktop *desktop);
50 static SPKnotHolder *sp_arc_knot_holder(SPItem *item, SPDesktop *desktop);
51 static SPKnotHolder *sp_star_knot_holder(SPItem *item, SPDesktop *desktop);
52 static SPKnotHolder *sp_spiral_knot_holder(SPItem *item, SPDesktop *desktop);
53 static SPKnotHolder *sp_offset_knot_holder(SPItem *item, SPDesktop *desktop);
54 static SPKnotHolder *sp_path_knot_holder(SPItem *item, SPDesktop *desktop);
55 static SPKnotHolder *sp_flowtext_knot_holder(SPItem *item, SPDesktop *desktop);
56 static void sp_pat_knot_holder(SPItem *item, SPKnotHolder *knot_holder);
58 SPKnotHolder *
59 sp_item_knot_holder(SPItem *item, SPDesktop *desktop)
60 {
61 if (SP_IS_RECT(item)) {
62 return sp_rect_knot_holder(item, desktop);
63 } else if (SP_IS_ARC(item)) {
64 return sp_arc_knot_holder(item, desktop);
65 } else if (SP_IS_STAR(item)) {
66 return sp_star_knot_holder(item, desktop);
67 } else if (SP_IS_SPIRAL(item)) {
68 return sp_spiral_knot_holder(item, desktop);
69 } else if (SP_IS_OFFSET(item)) {
70 return sp_offset_knot_holder(item, desktop);
71 } else if (SP_IS_PATH(item)) {
72 return sp_path_knot_holder(item, desktop);
73 } else if (SP_IS_FLOWTEXT(item) && SP_FLOWTEXT(item)->has_internal_frame()) {
74 return sp_flowtext_knot_holder(item, desktop);
75 }
77 return NULL;
78 }
81 /* Pattern manipulation */
83 static gdouble sp_pattern_extract_theta(SPPattern *pat, gdouble scale)
84 {
85 gdouble theta = asin(pat->patternTransform[1] / scale);
86 if (pat->patternTransform[0] < 0) theta = M_PI - theta ;
87 return theta;
88 }
90 static gdouble sp_pattern_extract_scale(SPPattern *pat)
91 {
92 gdouble s = pat->patternTransform[1];
93 gdouble c = pat->patternTransform[0];
94 gdouble xscale = sqrt(c * c + s * s);
95 return xscale;
96 }
98 static NR::Point sp_pattern_extract_trans(SPPattern const *pat)
99 {
100 return NR::Point(pat->patternTransform[4], pat->patternTransform[5]);
101 }
103 static void
104 sp_pattern_xy_set(SPItem *item, NR::Point const &p, NR::Point const &origin, guint state)
105 {
106 SPPattern *pat = SP_PATTERN(SP_STYLE_FILL_SERVER(SP_OBJECT(item)->style));
108 NR::Point p_snapped = p;
110 if ( state & GDK_CONTROL_MASK ) {
111 if (fabs((p - origin)[NR::X]) > fabs((p - origin)[NR::Y])) {
112 p_snapped[NR::Y] = origin[NR::Y];
113 } else {
114 p_snapped[NR::X] = origin[NR::X];
115 }
116 }
118 if (state) {
119 NR::Point const q = p_snapped - sp_pattern_extract_trans(pat);
120 sp_item_adjust_pattern(item, NR::Matrix(NR::translate(q)));
121 }
123 item->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
124 }
127 static NR::Point sp_pattern_xy_get(SPItem *item)
128 {
129 SPPattern const *pat = SP_PATTERN(SP_STYLE_FILL_SERVER(SP_OBJECT(item)->style));
130 return sp_pattern_extract_trans(pat);
131 }
133 static NR::Point sp_pattern_angle_get(SPItem *item)
134 {
135 SPPattern *pat = SP_PATTERN(SP_STYLE_FILL_SERVER(SP_OBJECT(item)->style));
137 gdouble x = (pattern_width(pat)*0.5);
138 gdouble y = 0;
139 NR::Point delta = NR::Point(x,y);
140 gdouble scale = sp_pattern_extract_scale(pat);
141 gdouble theta = sp_pattern_extract_theta(pat, scale);
142 delta = delta * NR::Matrix(NR::rotate(theta))*NR::Matrix(NR::scale(scale,scale));
143 delta = delta + sp_pattern_extract_trans(pat);
144 return delta;
145 }
147 static void
148 sp_pattern_angle_set(SPItem *item, NR::Point const &p, NR::Point const &origin, guint state)
149 {
150 int const snaps = prefs_get_int_attribute("options.rotationsnapsperpi", "value", 12);
152 SPPattern *pat = SP_PATTERN(SP_STYLE_FILL_SERVER(SP_OBJECT(item)->style));
154 // get the angle from pattern 0,0 to the cursor pos
155 NR::Point delta = p - sp_pattern_extract_trans(pat);
156 gdouble theta = atan2(delta);
158 if ( state & GDK_CONTROL_MASK ) {
159 theta = sp_round(theta, M_PI/snaps);
160 }
162 // get the scale from the current transform so we can keep it.
163 gdouble scl = sp_pattern_extract_scale(pat);
164 NR::Matrix rot = NR::Matrix(NR::rotate(theta)) * NR::Matrix(NR::scale(scl,scl));
165 NR::Point const t = sp_pattern_extract_trans(pat);
166 rot[4] = t[NR::X];
167 rot[5] = t[NR::Y];
168 sp_item_adjust_pattern(item, rot, true);
169 item->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
170 }
172 static void
173 sp_pattern_scale_set(SPItem *item, NR::Point const &p, NR::Point const &origin, guint state)
174 {
175 SPPattern *pat = SP_PATTERN(SP_STYLE_FILL_SERVER(SP_OBJECT(item)->style));
177 // Get the scale from the position of the knotholder,
178 NR::Point d = p - sp_pattern_extract_trans(pat);
179 gdouble s = NR::L2(d);
180 gdouble pat_x = pattern_width(pat) * 0.5;
181 gdouble pat_y = pattern_height(pat) * 0.5;
182 gdouble pat_h = hypot(pat_x, pat_y);
183 gdouble scl = s / pat_h;
185 // get angle from current transform, (need get current scale first to calculate angle)
186 gdouble oldscale = sp_pattern_extract_scale(pat);
187 gdouble theta = sp_pattern_extract_theta(pat,oldscale);
189 NR::Matrix rot = NR::Matrix(NR::rotate(theta)) * NR::Matrix(NR::scale(scl,scl));
190 NR::Point const t = sp_pattern_extract_trans(pat);
191 rot[4] = t[NR::X];
192 rot[5] = t[NR::Y];
193 sp_item_adjust_pattern(item, rot, true);
194 item->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
195 }
198 static NR::Point sp_pattern_scale_get(SPItem *item)
199 {
200 SPPattern *pat = SP_PATTERN(SP_STYLE_FILL_SERVER(SP_OBJECT(item)->style));
202 gdouble x = pattern_width(pat)*0.5;
203 gdouble y = pattern_height(pat)*0.5;
204 NR::Point delta = NR::Point(x,y);
205 NR::Matrix a = pat->patternTransform;
206 a[4] = 0;
207 a[5] = 0;
208 delta = delta * a;
209 delta = delta + sp_pattern_extract_trans(pat);
210 return delta;
211 }
213 /* SPRect */
215 static NR::Point sp_rect_rx_get(SPItem *item)
216 {
217 SPRect *rect = SP_RECT(item);
219 return NR::Point(rect->x.computed + rect->width.computed - rect->rx.computed, rect->y.computed);
220 }
222 static void sp_rect_rx_set(SPItem *item, NR::Point const &p, NR::Point const &origin, guint state)
223 {
224 SPRect *rect = SP_RECT(item);
226 if (state & GDK_CONTROL_MASK) {
227 gdouble temp = MIN(rect->height.computed, rect->width.computed) / 2.0;
228 rect->rx.computed = rect->ry.computed = CLAMP(rect->x.computed + rect->width.computed - p[NR::X], 0.0, temp);
229 rect->rx._set = rect->ry._set = true;
231 } else {
232 rect->rx.computed = CLAMP(rect->x.computed + rect->width.computed - p[NR::X], 0.0, rect->width.computed / 2.0);
233 rect->rx._set = true;
234 }
236 ((SPObject*)rect)->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
237 }
240 static NR::Point sp_rect_ry_get(SPItem *item)
241 {
242 SPRect *rect = SP_RECT(item);
244 return NR::Point(rect->x.computed + rect->width.computed, rect->y.computed + rect->ry.computed);
245 }
247 static void sp_rect_ry_set(SPItem *item, NR::Point const &p, NR::Point const &origin, guint state)
248 {
249 SPRect *rect = SP_RECT(item);
251 if (state & GDK_CONTROL_MASK) {
252 gdouble temp = MIN(rect->height.computed, rect->width.computed) / 2.0;
253 rect->rx.computed = rect->ry.computed = CLAMP(p[NR::Y] - rect->y.computed, 0.0, temp);
254 rect->ry._set = rect->rx._set = true;
255 } else {
256 if (!rect->rx._set || rect->rx.computed == 0) {
257 rect->ry.computed = CLAMP(p[NR::Y] - rect->y.computed,
258 0.0,
259 MIN(rect->height.computed / 2.0, rect->width.computed / 2.0));
260 } else {
261 rect->ry.computed = CLAMP(p[NR::Y] - rect->y.computed,
262 0.0,
263 rect->height.computed / 2.0);
264 }
266 rect->ry._set = true;
267 }
269 ((SPObject *)rect)->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
270 }
272 /**
273 * Remove rounding from a rectangle.
274 */
275 static void rect_remove_rounding(SPRect *rect)
276 {
277 SP_OBJECT_REPR(rect)->setAttribute("rx", NULL);
278 SP_OBJECT_REPR(rect)->setAttribute("ry", NULL);
279 }
281 /**
282 * Called when the horizontal rounding radius knot is clicked.
283 */
284 static void sp_rect_rx_knot_click(SPItem *item, guint state)
285 {
286 SPRect *rect = SP_RECT(item);
288 if (state & GDK_SHIFT_MASK) {
289 rect_remove_rounding(rect);
290 } else if (state & GDK_CONTROL_MASK) {
291 /* Ctrl-click sets the vertical rounding to be the same as the horizontal */
292 SP_OBJECT_REPR(rect)->setAttribute("ry", SP_OBJECT_REPR(rect)->attribute("rx"));
293 }
294 }
296 /**
297 * Called when the vertical rounding radius knot is clicked.
298 */
299 static void sp_rect_ry_knot_click(SPItem *item, guint state)
300 {
301 SPRect *rect = SP_RECT(item);
303 if (state & GDK_SHIFT_MASK) {
304 rect_remove_rounding(rect);
305 } else if (state & GDK_CONTROL_MASK) {
306 /* Ctrl-click sets the vertical rounding to be the same as the horizontal */
307 SP_OBJECT_REPR(rect)->setAttribute("rx", SP_OBJECT_REPR(rect)->attribute("ry"));
308 }
309 }
311 #define SGN(x) ((x)>0?1:((x)<0?-1:0))
313 static void sp_rect_clamp_radii(SPRect *rect)
314 {
315 // clamp rounding radii so that they do not exceed width/height
316 if (2 * rect->rx.computed > rect->width.computed) {
317 rect->rx.computed = 0.5 * rect->width.computed;
318 rect->rx._set = true;
319 }
320 if (2 * rect->ry.computed > rect->height.computed) {
321 rect->ry.computed = 0.5 * rect->height.computed;
322 rect->ry._set = true;
323 }
324 }
326 static NR::Point sp_rect_wh_get(SPItem *item)
327 {
328 SPRect *rect = SP_RECT(item);
330 return NR::Point(rect->x.computed + rect->width.computed, rect->y.computed + rect->height.computed);
331 }
333 static NR::Point rect_snap_knot_position(NR::Point const &p)
334 {
335 SPDesktop const *desktop = inkscape_active_desktop();
336 NR::Point s = sp_desktop_dt2root_xy_point(desktop, p);
337 SnapManager const m(desktop->namedview);
338 s = m.freeSnap(Inkscape::Snapper::BBOX_POINT | Inkscape::Snapper::SNAP_POINT, s, NULL).getPoint();
339 return sp_desktop_root2dt_xy_point(desktop, s);
340 }
342 static void sp_rect_wh_set_internal(SPRect *rect, NR::Point const &p, NR::Point const &origin, guint state)
343 {
344 NR::Point const s = rect_snap_knot_position(p);
346 if (state & GDK_CONTROL_MASK) {
347 // original width/height when drag started
348 gdouble const w_orig = (origin[NR::X] - rect->x.computed);
349 gdouble const h_orig = (origin[NR::Y] - rect->y.computed);
351 //original ratio
352 gdouble const ratio = (w_orig / h_orig);
354 // mouse displacement since drag started
355 gdouble const minx = s[NR::X] - origin[NR::X];
356 gdouble const miny = s[NR::Y] - origin[NR::Y];
358 if (fabs(minx) > fabs(miny)) {
360 // snap to horizontal or diagonal
361 rect->width.computed = MAX(w_orig + minx, 0);
362 if (minx != 0 && fabs(miny/minx) > 0.5 * 1/ratio && (SGN(minx) == SGN(miny))) {
363 // closer to the diagonal and in same-sign quarters, change both using ratio
364 rect->height.computed = MAX(h_orig + minx / ratio, 0);
365 } else {
366 // closer to the horizontal, change only width, height is h_orig
367 rect->height.computed = MAX(h_orig, 0);
368 }
370 } else {
371 // snap to vertical or diagonal
372 rect->height.computed = MAX(h_orig + miny, 0);
373 if (miny != 0 && fabs(minx/miny) > 0.5 * ratio && (SGN(minx) == SGN(miny))) {
374 // closer to the diagonal and in same-sign quarters, change both using ratio
375 rect->width.computed = MAX(w_orig + miny * ratio, 0);
376 } else {
377 // closer to the vertical, change only height, width is w_orig
378 rect->width.computed = MAX(w_orig, 0);
379 }
380 }
382 rect->width._set = rect->height._set = true;
384 } else {
385 // move freely
386 rect->width.computed = MAX(s[NR::X] - rect->x.computed, 0);
387 rect->height.computed = MAX(s[NR::Y] - rect->y.computed, 0);
388 rect->width._set = rect->height._set = true;
389 }
391 sp_rect_clamp_radii(rect);
393 ((SPObject *)rect)->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
394 }
396 static void sp_rect_wh_set(SPItem *item, NR::Point const &p, NR::Point const &origin, guint state)
397 {
398 SPRect *rect = SP_RECT(item);
400 sp_rect_wh_set_internal(rect, p, origin, state);
401 }
403 static NR::Point sp_rect_xy_get(SPItem *item)
404 {
405 SPRect *rect = SP_RECT(item);
407 return NR::Point(rect->x.computed, rect->y.computed);
408 }
410 static void sp_rect_xy_set(SPItem *item, NR::Point const &p, NR::Point const &origin, guint state)
411 {
412 SPRect *rect = SP_RECT(item);
414 // opposite corner (unmoved)
415 gdouble opposite_x = (rect->x.computed + rect->width.computed);
416 gdouble opposite_y = (rect->y.computed + rect->height.computed);
418 // original width/height when drag started
419 gdouble w_orig = opposite_x - origin[NR::X];
420 gdouble h_orig = opposite_y - origin[NR::Y];
422 NR::Point const s = rect_snap_knot_position(p);
424 // mouse displacement since drag started
425 gdouble minx = s[NR::X] - origin[NR::X];
426 gdouble miny = s[NR::Y] - origin[NR::Y];
428 if (state & GDK_CONTROL_MASK) {
429 //original ratio
430 gdouble ratio = (w_orig / h_orig);
432 if (fabs(minx) > fabs(miny)) {
434 // snap to horizontal or diagonal
435 rect->x.computed = MIN(s[NR::X], opposite_x);
436 rect->width.computed = MAX(w_orig - minx, 0);
437 if (minx != 0 && fabs(miny/minx) > 0.5 * 1/ratio && (SGN(minx) == SGN(miny))) {
438 // closer to the diagonal and in same-sign quarters, change both using ratio
439 rect->y.computed = MIN(origin[NR::Y] + minx / ratio, opposite_y);
440 rect->height.computed = MAX(h_orig - minx / ratio, 0);
441 } else {
442 // closer to the horizontal, change only width, height is h_orig
443 rect->y.computed = MIN(origin[NR::Y], opposite_y);
444 rect->height.computed = MAX(h_orig, 0);
445 }
447 } else {
449 // snap to vertical or diagonal
450 rect->y.computed = MIN(s[NR::Y], opposite_y);
451 rect->height.computed = MAX(h_orig - miny, 0);
452 if (miny != 0 && fabs(minx/miny) > 0.5 *ratio && (SGN(minx) == SGN(miny))) {
453 // closer to the diagonal and in same-sign quarters, change both using ratio
454 rect->x.computed = MIN(origin[NR::X] + miny * ratio, opposite_x);
455 rect->width.computed = MAX(w_orig - miny * ratio, 0);
456 } else {
457 // closer to the vertical, change only height, width is w_orig
458 rect->x.computed = MIN(origin[NR::X], opposite_x);
459 rect->width.computed = MAX(w_orig, 0);
460 }
462 }
464 rect->width._set = rect->height._set = rect->x._set = rect->y._set = true;
466 } else {
467 // move freely
468 rect->x.computed = MIN(s[NR::X], opposite_x);
469 rect->width.computed = MAX(w_orig - minx, 0);
470 rect->y.computed = MIN(s[NR::Y], opposite_y);
471 rect->height.computed = MAX(h_orig - miny, 0);
472 rect->width._set = rect->height._set = rect->x._set = rect->y._set = true;
473 }
475 sp_rect_clamp_radii(rect);
477 ((SPObject *)rect)->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
478 }
480 static SPKnotHolder *sp_rect_knot_holder(SPItem *item, SPDesktop *desktop)
481 {
482 SPKnotHolder *knot_holder = sp_knot_holder_new(desktop, item, NULL);
484 sp_knot_holder_add_full(
485 knot_holder, sp_rect_rx_set, sp_rect_rx_get, sp_rect_rx_knot_click,
486 SP_KNOT_SHAPE_CIRCLE, SP_KNOT_MODE_XOR,
487 _("Adjust the <b>horizontal rounding</b> radius; with <b>Ctrl</b> to make the vertical "
488 "radius the same"));
490 sp_knot_holder_add_full(
491 knot_holder, sp_rect_ry_set, sp_rect_ry_get, sp_rect_ry_knot_click,
492 SP_KNOT_SHAPE_CIRCLE, SP_KNOT_MODE_XOR,
493 _("Adjust the <b>vertical rounding</b> radius; with <b>Ctrl</b> to make the horizontal "
494 "radius the same")
495 );
497 sp_knot_holder_add_full(
498 knot_holder, sp_rect_wh_set, sp_rect_wh_get, NULL,
499 SP_KNOT_SHAPE_SQUARE, SP_KNOT_MODE_XOR,
500 _("Adjust the <b>width and height</b> of the rectangle; with <b>Ctrl</b> to lock ratio "
501 "or stretch in one dimension only")
502 );
504 sp_knot_holder_add_full(
505 knot_holder, sp_rect_xy_set, sp_rect_xy_get, NULL,
506 SP_KNOT_SHAPE_SQUARE, SP_KNOT_MODE_XOR,
507 _("Adjust the <b>width and height</b> of the rectangle; with <b>Ctrl</b> to lock ratio "
508 "or stretch in one dimension only")
509 );
511 sp_pat_knot_holder(item, knot_holder);
512 return knot_holder;
513 }
515 /* SPArc */
517 /*
518 * return values:
519 * 1 : inside
520 * 0 : on the curves
521 * -1 : outside
522 */
523 static gint
524 sp_genericellipse_side(SPGenericEllipse *ellipse, NR::Point const &p)
525 {
526 gdouble dx = (p[NR::X] - ellipse->cx.computed) / ellipse->rx.computed;
527 gdouble dy = (p[NR::Y] - ellipse->cy.computed) / ellipse->ry.computed;
529 gdouble s = dx * dx + dy * dy;
530 if (s < 1.0) return 1;
531 if (s > 1.0) return -1;
532 return 0;
533 }
535 static void
536 sp_arc_start_set(SPItem *item, NR::Point const &p, NR::Point const &origin, guint state)
537 {
538 int snaps = prefs_get_int_attribute("options.rotationsnapsperpi", "value", 12);
540 SPGenericEllipse *ge = SP_GENERICELLIPSE(item);
541 SPArc *arc = SP_ARC(item);
543 ge->closed = (sp_genericellipse_side(ge, p) == -1) ? TRUE : FALSE;
545 NR::Point delta = p - NR::Point(ge->cx.computed, ge->cy.computed);
546 NR::scale sc(ge->rx.computed, ge->ry.computed);
547 ge->start = atan2(delta * sc.inverse());
548 if ( ( state & GDK_CONTROL_MASK )
549 && snaps )
550 {
551 ge->start = sp_round(ge->start, M_PI/snaps);
552 }
553 sp_genericellipse_normalize(ge);
554 ((SPObject *)arc)->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
555 }
557 static NR::Point sp_arc_start_get(SPItem *item)
558 {
559 SPGenericEllipse *ge = SP_GENERICELLIPSE(item);
560 SPArc *arc = SP_ARC(item);
562 return sp_arc_get_xy(arc, ge->start);
563 }
565 static void
566 sp_arc_end_set(SPItem *item, NR::Point const &p, NR::Point const &origin, guint state)
567 {
568 int snaps = prefs_get_int_attribute("options.rotationsnapsperpi", "value", 12);
570 SPGenericEllipse *ge = SP_GENERICELLIPSE(item);
571 SPArc *arc = SP_ARC(item);
573 ge->closed = (sp_genericellipse_side(ge, p) == -1) ? TRUE : FALSE;
575 NR::Point delta = p - NR::Point(ge->cx.computed, ge->cy.computed);
576 NR::scale sc(ge->rx.computed, ge->ry.computed);
577 ge->end = atan2(delta * sc.inverse());
578 if ( ( state & GDK_CONTROL_MASK )
579 && snaps )
580 {
581 ge->end = sp_round(ge->end, M_PI/snaps);
582 }
583 sp_genericellipse_normalize(ge);
584 ((SPObject *)arc)->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
585 }
587 static NR::Point sp_arc_end_get(SPItem *item)
588 {
589 SPGenericEllipse *ge = SP_GENERICELLIPSE(item);
590 SPArc *arc = SP_ARC(item);
592 return sp_arc_get_xy(arc, ge->end);
593 }
595 static void
596 sp_arc_startend_click(SPItem *item, guint state)
597 {
598 SPGenericEllipse *ge = SP_GENERICELLIPSE(item);
600 if (state & GDK_SHIFT_MASK) {
601 ge->end = ge->start = 0;
602 ((SPObject *)ge)->updateRepr();
603 }
604 }
607 static void
608 sp_arc_rx_set(SPItem *item, NR::Point const &p, NR::Point const &origin, guint state)
609 {
610 SPGenericEllipse *ge = SP_GENERICELLIPSE(item);
611 SPArc *arc = SP_ARC(item);
613 ge->rx.computed = fabs( ge->cx.computed - p[NR::X] );
615 if ( state & GDK_CONTROL_MASK ) {
616 ge->ry.computed = ge->rx.computed;
617 }
619 ((SPObject *)arc)->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
620 }
622 static NR::Point sp_arc_rx_get(SPItem *item)
623 {
624 SPGenericEllipse *ge = SP_GENERICELLIPSE(item);
626 return (NR::Point(ge->cx.computed, ge->cy.computed) - NR::Point(ge->rx.computed, 0));
627 }
629 static void
630 sp_arc_ry_set(SPItem *item, NR::Point const &p, NR::Point const &origin, guint state)
631 {
632 SPGenericEllipse *ge = SP_GENERICELLIPSE(item);
633 SPArc *arc = SP_ARC(item);
635 ge->ry.computed = fabs( ge->cy.computed - p[NR::Y] );
637 if ( state & GDK_CONTROL_MASK ) {
638 ge->rx.computed = ge->ry.computed;
639 }
641 ((SPObject *)arc)->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
642 }
644 static NR::Point sp_arc_ry_get(SPItem *item)
645 {
646 SPGenericEllipse *ge = SP_GENERICELLIPSE(item);
648 return (NR::Point(ge->cx.computed, ge->cy.computed) - NR::Point(0, ge->ry.computed));
649 }
651 static void
652 sp_arc_rx_click(SPItem *item, guint state)
653 {
654 SPGenericEllipse *ge = SP_GENERICELLIPSE(item);
656 if (state & GDK_CONTROL_MASK) {
657 ge->ry.computed = ge->rx.computed;
658 ((SPObject *)ge)->updateRepr();
659 }
660 }
662 static void
663 sp_arc_ry_click(SPItem *item, guint state)
664 {
665 SPGenericEllipse *ge = SP_GENERICELLIPSE(item);
667 if (state & GDK_CONTROL_MASK) {
668 ge->rx.computed = ge->ry.computed;
669 ((SPObject *)ge)->updateRepr();
670 }
671 }
673 static SPKnotHolder *
674 sp_arc_knot_holder(SPItem *item, SPDesktop *desktop)
675 {
676 SPKnotHolder *knot_holder = sp_knot_holder_new(desktop, item, NULL);
678 sp_knot_holder_add_full(knot_holder, sp_arc_rx_set, sp_arc_rx_get, sp_arc_rx_click,
679 SP_KNOT_SHAPE_SQUARE, SP_KNOT_MODE_XOR,
680 _("Adjust ellipse <b>width</b>, with <b>Ctrl</b> to make circle"));
681 sp_knot_holder_add_full(knot_holder, sp_arc_ry_set, sp_arc_ry_get, sp_arc_ry_click,
682 SP_KNOT_SHAPE_SQUARE, SP_KNOT_MODE_XOR,
683 _("Adjust ellipse <b>height</b>, with <b>Ctrl</b> to make circle"));
684 sp_knot_holder_add_full(knot_holder, sp_arc_start_set, sp_arc_start_get, sp_arc_startend_click,
685 SP_KNOT_SHAPE_CIRCLE, SP_KNOT_MODE_XOR,
686 _("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"));
687 sp_knot_holder_add_full(knot_holder, sp_arc_end_set, sp_arc_end_get, sp_arc_startend_click,
688 SP_KNOT_SHAPE_CIRCLE, SP_KNOT_MODE_XOR,
689 _("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"));
691 sp_pat_knot_holder(item, knot_holder);
693 return knot_holder;
694 }
696 /* SPStar */
698 static void
699 sp_star_knot1_set(SPItem *item, NR::Point const &p, NR::Point const &origin, guint state)
700 {
701 SPStar *star = SP_STAR(item);
703 NR::Point d = p - star->center;
705 double arg1 = atan2(d);
706 double darg1 = arg1 - star->arg[0];
708 if (state & GDK_MOD1_MASK) {
709 star->randomized = darg1/(star->arg[0] - star->arg[1]);
710 } else if (state & GDK_SHIFT_MASK) {
711 star->rounded = darg1/(star->arg[0] - star->arg[1]);
712 } else if (state & GDK_CONTROL_MASK) {
713 star->r[0] = L2(d);
714 } else {
715 star->r[0] = L2(d);
716 star->arg[0] = arg1;
717 star->arg[1] += darg1;
718 }
719 ((SPObject *)star)->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
720 }
722 static void
723 sp_star_knot2_set(SPItem *item, NR::Point const &p, NR::Point const &origin, guint state)
724 {
725 SPStar *star = SP_STAR(item);
726 if (star->flatsided == false) {
727 NR::Point d = p - star->center;
729 double arg1 = atan2(d);
730 double darg1 = arg1 - star->arg[1];
732 if (state & GDK_MOD1_MASK) {
733 star->randomized = darg1/(star->arg[0] - star->arg[1]);
734 } else if (state & GDK_SHIFT_MASK) {
735 star->rounded = fabs(darg1/(star->arg[0] - star->arg[1]));
736 } else if (state & GDK_CONTROL_MASK) {
737 star->r[1] = L2(d);
738 star->arg[1] = star->arg[0] + M_PI / star->sides;
739 }
740 else {
741 star->r[1] = L2(d);
742 star->arg[1] = atan2(d);
743 }
744 ((SPObject *)star)->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
745 }
746 }
748 static NR::Point sp_star_knot1_get(SPItem *item)
749 {
750 g_assert(item != NULL);
752 SPStar *star = SP_STAR(item);
754 return sp_star_get_xy(star, SP_STAR_POINT_KNOT1, 0);
756 }
758 static NR::Point sp_star_knot2_get(SPItem *item)
759 {
760 g_assert(item != NULL);
762 SPStar *star = SP_STAR(item);
764 return sp_star_get_xy(star, SP_STAR_POINT_KNOT2, 0);
765 }
767 static void
768 sp_star_knot_click(SPItem *item, guint state)
769 {
770 SPStar *star = SP_STAR(item);
772 if (state & GDK_MOD1_MASK) {
773 star->randomized = 0;
774 ((SPObject *)star)->updateRepr();
775 } else if (state & GDK_SHIFT_MASK) {
776 star->rounded = 0;
777 ((SPObject *)star)->updateRepr();
778 } else if (state & GDK_CONTROL_MASK) {
779 star->arg[1] = star->arg[0] + M_PI / star->sides;
780 ((SPObject *)star)->updateRepr();
781 }
782 }
784 static SPKnotHolder *
785 sp_star_knot_holder(SPItem *item, SPDesktop *desktop)
786 {
787 /* we don't need to get parent knot_holder */
788 SPKnotHolder *knot_holder = sp_knot_holder_new(desktop, item, NULL);
789 g_assert(item != NULL);
791 SPStar *star = SP_STAR(item);
793 sp_knot_holder_add(knot_holder, sp_star_knot1_set, sp_star_knot1_get, sp_star_knot_click,
794 _("Adjust the <b>tip radius</b> of the star or polygon; with <b>Shift</b> to round; with <b>Alt</b> to randomize"));
795 if (star->flatsided == false)
796 sp_knot_holder_add(knot_holder, sp_star_knot2_set, sp_star_knot2_get, sp_star_knot_click,
797 _("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"));
799 sp_pat_knot_holder(item, knot_holder);
801 return knot_holder;
802 }
804 /* SPSpiral */
806 /*
807 * set attributes via inner (t=t0) knot point:
808 * [default] increase/decrease inner point
809 * [shift] increase/decrease inner and outer arg synchronizely
810 * [control] constrain inner arg to round per PI/4
811 */
812 static void
813 sp_spiral_inner_set(SPItem *item, NR::Point const &p, NR::Point const &origin, guint state)
814 {
815 int snaps = prefs_get_int_attribute("options.rotationsnapsperpi", "value", 12);
817 SPSpiral *spiral = SP_SPIRAL(item);
819 gdouble dx = p[NR::X] - spiral->cx;
820 gdouble dy = p[NR::Y] - spiral->cy;
822 if (state & GDK_MOD1_MASK) {
823 // adjust divergence by vertical drag, relative to rad
824 double new_exp = (spiral->rad + dy)/(spiral->rad);
825 spiral->exp = new_exp > 0? new_exp : 0;
826 } else {
827 // roll/unroll from inside
828 gdouble arg_t0;
829 sp_spiral_get_polar(spiral, spiral->t0, NULL, &arg_t0);
831 gdouble arg_tmp = atan2(dy, dx) - arg_t0;
832 gdouble arg_t0_new = arg_tmp - floor((arg_tmp+M_PI)/(2.0*M_PI))*2.0*M_PI + arg_t0;
833 spiral->t0 = (arg_t0_new - spiral->arg) / (2.0*M_PI*spiral->revo);
835 /* round inner arg per PI/snaps, if CTRL is pressed */
836 if ( ( state & GDK_CONTROL_MASK )
837 && ( fabs(spiral->revo) > SP_EPSILON_2 )
838 && ( snaps != 0 ) ) {
839 gdouble arg = 2.0*M_PI*spiral->revo*spiral->t0 + spiral->arg;
840 spiral->t0 = (sp_round(arg, M_PI/snaps) - spiral->arg)/(2.0*M_PI*spiral->revo);
841 }
843 spiral->t0 = CLAMP(spiral->t0, 0.0, 0.999);
844 }
846 ((SPObject *)spiral)->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
847 }
849 /*
850 * set attributes via outer (t=1) knot point:
851 * [default] increase/decrease revolution factor
852 * [control] constrain inner arg to round per PI/4
853 */
854 static void
855 sp_spiral_outer_set(SPItem *item, NR::Point const &p, NR::Point const &origin, guint state)
856 {
857 int snaps = prefs_get_int_attribute("options.rotationsnapsperpi", "value", 12);
859 SPSpiral *spiral = SP_SPIRAL(item);
861 gdouble dx = p[NR::X] - spiral->cx;
862 gdouble dy = p[NR::Y] - spiral->cy;
864 if (state & GDK_SHIFT_MASK) { // rotate without roll/unroll
865 spiral->arg = atan2(dy, dx) - 2.0*M_PI*spiral->revo;
866 if (!(state & GDK_MOD1_MASK)) {
867 // if alt not pressed, change also rad; otherwise it is locked
868 spiral->rad = MAX(hypot(dx, dy), 0.001);
869 }
870 if ( ( state & GDK_CONTROL_MASK )
871 && snaps ) {
872 spiral->arg = sp_round(spiral->arg, M_PI/snaps);
873 }
874 } else { // roll/unroll
875 // arg of the spiral outer end
876 double arg_1;
877 sp_spiral_get_polar(spiral, 1, NULL, &arg_1);
879 // its fractional part after the whole turns are subtracted
880 double arg_r = arg_1 - sp_round(arg_1, 2.0*M_PI);
882 // arg of the mouse point relative to spiral center
883 double mouse_angle = atan2(dy, dx);
884 if (mouse_angle < 0)
885 mouse_angle += 2*M_PI;
887 // snap if ctrl
888 if ( ( state & GDK_CONTROL_MASK ) && snaps ) {
889 mouse_angle = sp_round(mouse_angle, M_PI/snaps);
890 }
892 // by how much we want to rotate the outer point
893 double diff = mouse_angle - arg_r;
894 if (diff > M_PI)
895 diff -= 2*M_PI;
896 else if (diff < -M_PI)
897 diff += 2*M_PI;
899 // calculate the new rad;
900 // the value of t corresponding to the angle arg_1 + diff:
901 double t_temp = ((arg_1 + diff) - spiral->arg)/(2*M_PI*spiral->revo);
902 // the rad at that t:
903 double rad_new = 0;
904 if (t_temp > spiral->t0)
905 sp_spiral_get_polar(spiral, t_temp, &rad_new, NULL);
907 // change the revo (converting diff from radians to the number of turns)
908 spiral->revo += diff/(2*M_PI);
909 if (spiral->revo < 1e-3)
910 spiral->revo = 1e-3;
912 // if alt not pressed and the values are sane, change the rad
913 if (!(state & GDK_MOD1_MASK) && rad_new > 1e-3 && rad_new/spiral->rad < 2) {
914 // adjust t0 too so that the inner point stays unmoved
915 double r0;
916 sp_spiral_get_polar(spiral, spiral->t0, &r0, NULL);
917 spiral->rad = rad_new;
918 spiral->t0 = pow(r0 / spiral->rad, 1.0/spiral->exp);
919 }
920 if (!isFinite(spiral->t0)) spiral->t0 = 0.0;
921 spiral->t0 = CLAMP(spiral->t0, 0.0, 0.999);
922 }
924 ((SPObject *)spiral)->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
925 }
927 static NR::Point sp_spiral_inner_get(SPItem *item)
928 {
929 SPSpiral *spiral = SP_SPIRAL(item);
931 return sp_spiral_get_xy(spiral, spiral->t0);
932 }
934 static NR::Point sp_spiral_outer_get(SPItem *item)
935 {
936 SPSpiral *spiral = SP_SPIRAL(item);
938 return sp_spiral_get_xy(spiral, 1.0);
939 }
941 static void
942 sp_spiral_inner_click(SPItem *item, guint state)
943 {
944 SPSpiral *spiral = SP_SPIRAL(item);
946 if (state & GDK_MOD1_MASK) {
947 spiral->exp = 1;
948 ((SPObject *)spiral)->updateRepr();
949 } else if (state & GDK_SHIFT_MASK) {
950 spiral->t0 = 0;
951 ((SPObject *)spiral)->updateRepr();
952 }
953 }
955 static SPKnotHolder *
956 sp_spiral_knot_holder(SPItem *item, SPDesktop *desktop)
957 {
958 SPKnotHolder *knot_holder = sp_knot_holder_new(desktop, item, NULL);
960 sp_knot_holder_add(knot_holder, sp_spiral_inner_set, sp_spiral_inner_get, sp_spiral_inner_click,
961 _("Roll/unroll the spiral from <b>inside</b>; with <b>Ctrl</b> to snap angle; with <b>Alt</b> to converge/diverge"));
962 sp_knot_holder_add(knot_holder, sp_spiral_outer_set, sp_spiral_outer_get, NULL,
963 _("Roll/unroll the spiral from <b>outside</b>; with <b>Ctrl</b> to snap angle; with <b>Shift</b> to scale/rotate"));
965 sp_pat_knot_holder(item, knot_holder);
967 return knot_holder;
968 }
970 /* SPOffset */
972 static void
973 sp_offset_offset_set(SPItem *item, NR::Point const &p, NR::Point const &origin, guint state)
974 {
975 SPOffset *offset = SP_OFFSET(item);
977 offset->rad = sp_offset_distance_to_original(offset, p);
978 offset->knot = p;
979 offset->knotSet = true;
981 ((SPObject *)offset)->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
982 }
985 static NR::Point sp_offset_offset_get(SPItem *item)
986 {
987 SPOffset *offset = SP_OFFSET(item);
989 NR::Point np;
990 sp_offset_top_point(offset,&np);
991 return np;
992 }
994 static SPKnotHolder *
995 sp_offset_knot_holder(SPItem *item, SPDesktop *desktop)
996 {
997 SPKnotHolder *knot_holder = sp_knot_holder_new(desktop, item, NULL);
999 sp_knot_holder_add(knot_holder, sp_offset_offset_set, sp_offset_offset_get, NULL,
1000 _("Adjust the <b>offset distance</b>"));
1002 sp_pat_knot_holder(item, knot_holder);
1004 return knot_holder;
1005 }
1007 static SPKnotHolder *
1008 sp_path_knot_holder(SPItem *item, SPDesktop *desktop) // FIXME: eliminate, instead make a pattern-drag similar to gradient-drag
1009 {
1010 if ((SP_OBJECT(item)->style->fill.type == SP_PAINT_TYPE_PAINTSERVER)
1011 && SP_IS_PATTERN(SP_STYLE_FILL_SERVER(SP_OBJECT(item)->style)))
1012 {
1013 SPKnotHolder *knot_holder = sp_knot_holder_new(desktop, item, NULL);
1015 sp_pat_knot_holder(item, knot_holder);
1017 return knot_holder;
1018 }
1019 return NULL;
1020 }
1022 static void
1023 sp_pat_knot_holder(SPItem *item, SPKnotHolder *knot_holder)
1024 {
1025 if ((SP_OBJECT(item)->style->fill.type == SP_PAINT_TYPE_PAINTSERVER)
1026 && SP_IS_PATTERN(SP_STYLE_FILL_SERVER(SP_OBJECT(item)->style)))
1027 {
1028 sp_knot_holder_add_full(knot_holder, sp_pattern_xy_set, sp_pattern_xy_get, NULL, SP_KNOT_SHAPE_CROSS, SP_KNOT_MODE_XOR,
1029 // TRANSLATORS: This refers to the pattern that's inside the object
1030 _("<b>Move</b> the pattern fill inside the object"));
1031 sp_knot_holder_add_full(knot_holder, sp_pattern_scale_set, sp_pattern_scale_get, NULL, SP_KNOT_SHAPE_SQUARE, SP_KNOT_MODE_XOR,
1032 _("<b>Scale</b> the pattern fill uniformly"));
1033 sp_knot_holder_add_full(knot_holder, sp_pattern_angle_set, sp_pattern_angle_get, NULL, SP_KNOT_SHAPE_CIRCLE, SP_KNOT_MODE_XOR,
1034 _("<b>Rotate</b> the pattern fill; with <b>Ctrl</b> to snap angle"));
1035 }
1036 }
1038 static NR::Point sp_flowtext_corner_get(SPItem *item)
1039 {
1040 SPRect *rect = SP_RECT(item);
1042 return NR::Point(rect->x.computed + rect->width.computed, rect->y.computed + rect->height.computed);
1043 }
1045 static void
1046 sp_flowtext_corner_set(SPItem *item, NR::Point const &p, NR::Point const &origin, guint state)
1047 {
1048 SPRect *rect = SP_RECT(item);
1050 sp_rect_wh_set_internal(rect, p, origin, state);
1051 }
1053 static SPKnotHolder *
1054 sp_flowtext_knot_holder(SPItem *item, SPDesktop *desktop)
1055 {
1056 SPKnotHolder *knot_holder = sp_knot_holder_new(desktop, SP_FLOWTEXT(item)->get_frame(NULL), NULL);
1058 sp_knot_holder_add(knot_holder, sp_flowtext_corner_set, sp_flowtext_corner_get, NULL,
1059 _("Drag to resize the <b>flowed text frame</b>"));
1061 return knot_holder;
1062 }
1065 /*
1066 Local Variables:
1067 mode:c++
1068 c-file-style:"stroustrup"
1069 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
1070 indent-tabs-mode:nil
1071 fill-column:99
1072 End:
1073 */
1074 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :