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"
32 #include "sp-namedview.h"
34 #include "sp-pattern.h"
35 #include "sp-path.h"
37 #include <glibmm/i18n.h>
39 #include "object-edit.h"
41 #include <libnr/nr-scale-ops.h>
44 #include "xml/repr.h"
46 #include "isnan.h"
48 #define sp_round(v,m) (((v) < 0.0) ? ((ceil((v) / (m) - 0.5)) * (m)) : ((floor((v) / (m) + 0.5)) * (m)))
50 static SPKnotHolder *sp_rect_knot_holder(SPItem *item, SPDesktop *desktop);
51 static SPKnotHolder *sp_arc_knot_holder(SPItem *item, SPDesktop *desktop);
52 static SPKnotHolder *sp_star_knot_holder(SPItem *item, SPDesktop *desktop);
53 static SPKnotHolder *sp_spiral_knot_holder(SPItem *item, SPDesktop *desktop);
54 static SPKnotHolder *sp_offset_knot_holder(SPItem *item, SPDesktop *desktop);
55 static SPKnotHolder *sp_path_knot_holder(SPItem *item, SPDesktop *desktop);
56 static SPKnotHolder *sp_flowtext_knot_holder(SPItem *item, SPDesktop *desktop);
57 static void sp_pat_knot_holder(SPItem *item, SPKnotHolder *knot_holder);
59 SPKnotHolder *
60 sp_item_knot_holder(SPItem *item, SPDesktop *desktop)
61 {
62 if (SP_IS_RECT(item)) {
63 return sp_rect_knot_holder(item, desktop);
64 } else if (SP_IS_ARC(item)) {
65 return sp_arc_knot_holder(item, desktop);
66 } else if (SP_IS_STAR(item)) {
67 return sp_star_knot_holder(item, desktop);
68 } else if (SP_IS_SPIRAL(item)) {
69 return sp_spiral_knot_holder(item, desktop);
70 } else if (SP_IS_OFFSET(item)) {
71 return sp_offset_knot_holder(item, desktop);
72 } else if (SP_IS_PATH(item)) {
73 return sp_path_knot_holder(item, desktop);
74 } else if (SP_IS_FLOWTEXT(item) && SP_FLOWTEXT(item)->has_internal_frame()) {
75 return sp_flowtext_knot_holder(item, desktop);
76 }
78 return NULL;
79 }
82 /* Pattern manipulation */
84 static gdouble sp_pattern_extract_theta(SPPattern *pat, gdouble scale)
85 {
86 gdouble theta = asin(pat->patternTransform[1] / scale);
87 if (pat->patternTransform[0] < 0) theta = M_PI - theta ;
88 return theta;
89 }
91 static gdouble sp_pattern_extract_scale(SPPattern *pat)
92 {
93 gdouble s = pat->patternTransform[1];
94 gdouble c = pat->patternTransform[0];
95 gdouble xscale = sqrt(c * c + s * s);
96 return xscale;
97 }
99 static NR::Point sp_pattern_extract_trans(SPPattern const *pat)
100 {
101 return NR::Point(pat->patternTransform[4], pat->patternTransform[5]);
102 }
104 static void
105 sp_pattern_xy_set(SPItem *item, NR::Point const &p, NR::Point const &origin, guint state)
106 {
107 SPPattern *pat = SP_PATTERN(SP_STYLE_FILL_SERVER(SP_OBJECT(item)->style));
109 NR::Point p_snapped = p;
111 if ( state & GDK_CONTROL_MASK ) {
112 if (fabs((p - origin)[NR::X]) > fabs((p - origin)[NR::Y])) {
113 p_snapped[NR::Y] = origin[NR::Y];
114 } else {
115 p_snapped[NR::X] = origin[NR::X];
116 }
117 }
119 if (state) {
120 NR::Point const q = p_snapped - sp_pattern_extract_trans(pat);
121 sp_item_adjust_pattern(item, NR::Matrix(NR::translate(q)));
122 }
124 item->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
125 }
128 static NR::Point sp_pattern_xy_get(SPItem *item)
129 {
130 SPPattern const *pat = SP_PATTERN(SP_STYLE_FILL_SERVER(SP_OBJECT(item)->style));
131 return sp_pattern_extract_trans(pat);
132 }
134 static NR::Point sp_pattern_angle_get(SPItem *item)
135 {
136 SPPattern *pat = SP_PATTERN(SP_STYLE_FILL_SERVER(SP_OBJECT(item)->style));
138 gdouble x = (pattern_width(pat)*0.5);
139 gdouble y = 0;
140 NR::Point delta = NR::Point(x,y);
141 gdouble scale = sp_pattern_extract_scale(pat);
142 gdouble theta = sp_pattern_extract_theta(pat, scale);
143 delta = delta * NR::Matrix(NR::rotate(theta))*NR::Matrix(NR::scale(scale,scale));
144 delta = delta + sp_pattern_extract_trans(pat);
145 return delta;
146 }
148 static void
149 sp_pattern_angle_set(SPItem *item, NR::Point const &p, NR::Point const &origin, guint state)
150 {
151 int const snaps = prefs_get_int_attribute("options.rotationsnapsperpi", "value", 12);
153 SPPattern *pat = SP_PATTERN(SP_STYLE_FILL_SERVER(SP_OBJECT(item)->style));
155 // get the angle from pattern 0,0 to the cursor pos
156 NR::Point delta = p - sp_pattern_extract_trans(pat);
157 gdouble theta = atan2(delta);
159 if ( state & GDK_CONTROL_MASK ) {
160 theta = sp_round(theta, M_PI/snaps);
161 }
163 // get the scale from the current transform so we can keep it.
164 gdouble scl = sp_pattern_extract_scale(pat);
165 NR::Matrix rot = NR::Matrix(NR::rotate(theta)) * NR::Matrix(NR::scale(scl,scl));
166 NR::Point const t = sp_pattern_extract_trans(pat);
167 rot[4] = t[NR::X];
168 rot[5] = t[NR::Y];
169 sp_item_adjust_pattern(item, rot, true);
170 item->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
171 }
173 static void
174 sp_pattern_scale_set(SPItem *item, NR::Point const &p, NR::Point const &origin, guint state)
175 {
176 SPPattern *pat = SP_PATTERN(SP_STYLE_FILL_SERVER(SP_OBJECT(item)->style));
178 // Get the scale from the position of the knotholder,
179 NR::Point d = p - sp_pattern_extract_trans(pat);
180 gdouble s = NR::L2(d);
181 gdouble pat_x = pattern_width(pat) * 0.5;
182 gdouble pat_y = pattern_height(pat) * 0.5;
183 gdouble pat_h = hypot(pat_x, pat_y);
184 gdouble scl = s / pat_h;
186 // get angle from current transform, (need get current scale first to calculate angle)
187 gdouble oldscale = sp_pattern_extract_scale(pat);
188 gdouble theta = sp_pattern_extract_theta(pat,oldscale);
190 NR::Matrix rot = NR::Matrix(NR::rotate(theta)) * NR::Matrix(NR::scale(scl,scl));
191 NR::Point const t = sp_pattern_extract_trans(pat);
192 rot[4] = t[NR::X];
193 rot[5] = t[NR::Y];
194 sp_item_adjust_pattern(item, rot, true);
195 item->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
196 }
199 static NR::Point sp_pattern_scale_get(SPItem *item)
200 {
201 SPPattern *pat = SP_PATTERN(SP_STYLE_FILL_SERVER(SP_OBJECT(item)->style));
203 gdouble x = pattern_width(pat)*0.5;
204 gdouble y = pattern_height(pat)*0.5;
205 NR::Point delta = NR::Point(x,y);
206 NR::Matrix a = pat->patternTransform;
207 a[4] = 0;
208 a[5] = 0;
209 delta = delta * a;
210 delta = delta + sp_pattern_extract_trans(pat);
211 return delta;
212 }
214 /* SPRect */
216 static NR::Point sp_rect_rx_get(SPItem *item)
217 {
218 SPRect *rect = SP_RECT(item);
220 return NR::Point(rect->x.computed + rect->width.computed - rect->rx.computed, rect->y.computed);
221 }
223 static void sp_rect_rx_set(SPItem *item, NR::Point const &p, NR::Point const &origin, guint state)
224 {
225 SPRect *rect = SP_RECT(item);
227 if (state & GDK_CONTROL_MASK) {
228 gdouble temp = MIN(rect->height.computed, rect->width.computed) / 2.0;
229 rect->rx.computed = rect->ry.computed = CLAMP(rect->x.computed + rect->width.computed - p[NR::X], 0.0, temp);
230 rect->rx._set = rect->ry._set = true;
232 } else {
233 rect->rx.computed = CLAMP(rect->x.computed + rect->width.computed - p[NR::X], 0.0, rect->width.computed / 2.0);
234 rect->rx._set = true;
235 }
237 ((SPObject*)rect)->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
238 }
241 static NR::Point sp_rect_ry_get(SPItem *item)
242 {
243 SPRect *rect = SP_RECT(item);
245 return NR::Point(rect->x.computed + rect->width.computed, rect->y.computed + rect->ry.computed);
246 }
248 static void sp_rect_ry_set(SPItem *item, NR::Point const &p, NR::Point const &origin, guint state)
249 {
250 SPRect *rect = SP_RECT(item);
252 if (state & GDK_CONTROL_MASK) {
253 gdouble temp = MIN(rect->height.computed, rect->width.computed) / 2.0;
254 rect->rx.computed = rect->ry.computed = CLAMP(p[NR::Y] - rect->y.computed, 0.0, temp);
255 rect->ry._set = rect->rx._set = true;
256 } else {
257 if (!rect->rx._set || rect->rx.computed == 0) {
258 rect->ry.computed = CLAMP(p[NR::Y] - rect->y.computed,
259 0.0,
260 MIN(rect->height.computed / 2.0, rect->width.computed / 2.0));
261 } else {
262 rect->ry.computed = CLAMP(p[NR::Y] - rect->y.computed,
263 0.0,
264 rect->height.computed / 2.0);
265 }
267 rect->ry._set = true;
268 }
270 ((SPObject *)rect)->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
271 }
273 /**
274 * Remove rounding from a rectangle.
275 */
276 static void rect_remove_rounding(SPRect *rect)
277 {
278 SP_OBJECT_REPR(rect)->setAttribute("rx", NULL);
279 SP_OBJECT_REPR(rect)->setAttribute("ry", NULL);
280 }
282 /**
283 * Called when the horizontal rounding radius knot is clicked.
284 */
285 static void sp_rect_rx_knot_click(SPItem *item, guint state)
286 {
287 SPRect *rect = SP_RECT(item);
289 if (state & GDK_SHIFT_MASK) {
290 rect_remove_rounding(rect);
291 } else if (state & GDK_CONTROL_MASK) {
292 /* Ctrl-click sets the vertical rounding to be the same as the horizontal */
293 SP_OBJECT_REPR(rect)->setAttribute("ry", SP_OBJECT_REPR(rect)->attribute("rx"));
294 }
295 }
297 /**
298 * Called when the vertical rounding radius knot is clicked.
299 */
300 static void sp_rect_ry_knot_click(SPItem *item, guint state)
301 {
302 SPRect *rect = SP_RECT(item);
304 if (state & GDK_SHIFT_MASK) {
305 rect_remove_rounding(rect);
306 } else if (state & GDK_CONTROL_MASK) {
307 /* Ctrl-click sets the vertical rounding to be the same as the horizontal */
308 SP_OBJECT_REPR(rect)->setAttribute("rx", SP_OBJECT_REPR(rect)->attribute("ry"));
309 }
310 }
312 #define SGN(x) ((x)>0?1:((x)<0?-1:0))
314 static void sp_rect_clamp_radii(SPRect *rect)
315 {
316 // clamp rounding radii so that they do not exceed width/height
317 if (2 * rect->rx.computed > rect->width.computed) {
318 rect->rx.computed = 0.5 * rect->width.computed;
319 rect->rx._set = true;
320 }
321 if (2 * rect->ry.computed > rect->height.computed) {
322 rect->ry.computed = 0.5 * rect->height.computed;
323 rect->ry._set = true;
324 }
325 }
327 static NR::Point sp_rect_wh_get(SPItem *item)
328 {
329 SPRect *rect = SP_RECT(item);
331 return NR::Point(rect->x.computed + rect->width.computed, rect->y.computed + rect->height.computed);
332 }
334 static NR::Point rect_snap_knot_position(NR::Point const &p)
335 {
336 SPDesktop const *desktop = inkscape_active_desktop();
337 NR::Point s = sp_desktop_dt2root_xy_point(desktop, p);
338 SnapManager const &m = desktop->namedview->snap_manager;
339 s = m.freeSnap(Inkscape::Snapper::BBOX_POINT | Inkscape::Snapper::SNAP_POINT, s, NULL).getPoint();
340 return sp_desktop_root2dt_xy_point(desktop, s);
341 }
343 static void sp_rect_wh_set_internal(SPRect *rect, NR::Point const &p, NR::Point const &origin, guint state)
344 {
345 NR::Point const s = rect_snap_knot_position(p);
347 if (state & GDK_CONTROL_MASK) {
348 // original width/height when drag started
349 gdouble const w_orig = (origin[NR::X] - rect->x.computed);
350 gdouble const h_orig = (origin[NR::Y] - rect->y.computed);
352 //original ratio
353 gdouble const ratio = (w_orig / h_orig);
355 // mouse displacement since drag started
356 gdouble const minx = s[NR::X] - origin[NR::X];
357 gdouble const miny = s[NR::Y] - origin[NR::Y];
359 if (fabs(minx) > fabs(miny)) {
361 // snap to horizontal or diagonal
362 rect->width.computed = MAX(w_orig + minx, 0);
363 if (minx != 0 && fabs(miny/minx) > 0.5 * 1/ratio && (SGN(minx) == SGN(miny))) {
364 // closer to the diagonal and in same-sign quarters, change both using ratio
365 rect->height.computed = MAX(h_orig + minx / ratio, 0);
366 } else {
367 // closer to the horizontal, change only width, height is h_orig
368 rect->height.computed = MAX(h_orig, 0);
369 }
371 } else {
372 // snap to vertical or diagonal
373 rect->height.computed = MAX(h_orig + miny, 0);
374 if (miny != 0 && fabs(minx/miny) > 0.5 * ratio && (SGN(minx) == SGN(miny))) {
375 // closer to the diagonal and in same-sign quarters, change both using ratio
376 rect->width.computed = MAX(w_orig + miny * ratio, 0);
377 } else {
378 // closer to the vertical, change only height, width is w_orig
379 rect->width.computed = MAX(w_orig, 0);
380 }
381 }
383 rect->width._set = rect->height._set = true;
385 } else {
386 // move freely
387 rect->width.computed = MAX(s[NR::X] - rect->x.computed, 0);
388 rect->height.computed = MAX(s[NR::Y] - rect->y.computed, 0);
389 rect->width._set = rect->height._set = true;
390 }
392 sp_rect_clamp_radii(rect);
394 ((SPObject *)rect)->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
395 }
397 static void sp_rect_wh_set(SPItem *item, NR::Point const &p, NR::Point const &origin, guint state)
398 {
399 SPRect *rect = SP_RECT(item);
401 sp_rect_wh_set_internal(rect, p, origin, state);
402 }
404 static NR::Point sp_rect_xy_get(SPItem *item)
405 {
406 SPRect *rect = SP_RECT(item);
408 return NR::Point(rect->x.computed, rect->y.computed);
409 }
411 static void sp_rect_xy_set(SPItem *item, NR::Point const &p, NR::Point const &origin, guint state)
412 {
413 SPRect *rect = SP_RECT(item);
415 // opposite corner (unmoved)
416 gdouble opposite_x = (rect->x.computed + rect->width.computed);
417 gdouble opposite_y = (rect->y.computed + rect->height.computed);
419 // original width/height when drag started
420 gdouble w_orig = opposite_x - origin[NR::X];
421 gdouble h_orig = opposite_y - origin[NR::Y];
423 NR::Point const s = rect_snap_knot_position(p);
425 // mouse displacement since drag started
426 gdouble minx = s[NR::X] - origin[NR::X];
427 gdouble miny = s[NR::Y] - origin[NR::Y];
429 if (state & GDK_CONTROL_MASK) {
430 //original ratio
431 gdouble ratio = (w_orig / h_orig);
433 if (fabs(minx) > fabs(miny)) {
435 // snap to horizontal or diagonal
436 rect->x.computed = MIN(s[NR::X], opposite_x);
437 rect->width.computed = MAX(w_orig - minx, 0);
438 if (minx != 0 && fabs(miny/minx) > 0.5 * 1/ratio && (SGN(minx) == SGN(miny))) {
439 // closer to the diagonal and in same-sign quarters, change both using ratio
440 rect->y.computed = MIN(origin[NR::Y] + minx / ratio, opposite_y);
441 rect->height.computed = MAX(h_orig - minx / ratio, 0);
442 } else {
443 // closer to the horizontal, change only width, height is h_orig
444 rect->y.computed = MIN(origin[NR::Y], opposite_y);
445 rect->height.computed = MAX(h_orig, 0);
446 }
448 } else {
450 // snap to vertical or diagonal
451 rect->y.computed = MIN(s[NR::Y], opposite_y);
452 rect->height.computed = MAX(h_orig - miny, 0);
453 if (miny != 0 && fabs(minx/miny) > 0.5 *ratio && (SGN(minx) == SGN(miny))) {
454 // closer to the diagonal and in same-sign quarters, change both using ratio
455 rect->x.computed = MIN(origin[NR::X] + miny * ratio, opposite_x);
456 rect->width.computed = MAX(w_orig - miny * ratio, 0);
457 } else {
458 // closer to the vertical, change only height, width is w_orig
459 rect->x.computed = MIN(origin[NR::X], opposite_x);
460 rect->width.computed = MAX(w_orig, 0);
461 }
463 }
465 rect->width._set = rect->height._set = rect->x._set = rect->y._set = true;
467 } else {
468 // move freely
469 rect->x.computed = MIN(s[NR::X], opposite_x);
470 rect->width.computed = MAX(w_orig - minx, 0);
471 rect->y.computed = MIN(s[NR::Y], opposite_y);
472 rect->height.computed = MAX(h_orig - miny, 0);
473 rect->width._set = rect->height._set = rect->x._set = rect->y._set = true;
474 }
476 sp_rect_clamp_radii(rect);
478 ((SPObject *)rect)->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
479 }
481 static SPKnotHolder *sp_rect_knot_holder(SPItem *item, SPDesktop *desktop)
482 {
483 SPKnotHolder *knot_holder = sp_knot_holder_new(desktop, item, NULL);
485 sp_knot_holder_add_full(
486 knot_holder, sp_rect_rx_set, sp_rect_rx_get, sp_rect_rx_knot_click,
487 SP_KNOT_SHAPE_CIRCLE, SP_KNOT_MODE_XOR,
488 _("Adjust the <b>horizontal rounding</b> radius; with <b>Ctrl</b> to make the vertical "
489 "radius the same"));
491 sp_knot_holder_add_full(
492 knot_holder, sp_rect_ry_set, sp_rect_ry_get, sp_rect_ry_knot_click,
493 SP_KNOT_SHAPE_CIRCLE, SP_KNOT_MODE_XOR,
494 _("Adjust the <b>vertical rounding</b> radius; with <b>Ctrl</b> to make the horizontal "
495 "radius the same")
496 );
498 sp_knot_holder_add_full(
499 knot_holder, sp_rect_wh_set, sp_rect_wh_get, NULL,
500 SP_KNOT_SHAPE_SQUARE, SP_KNOT_MODE_XOR,
501 _("Adjust the <b>width and height</b> of the rectangle; with <b>Ctrl</b> to lock ratio "
502 "or stretch in one dimension only")
503 );
505 sp_knot_holder_add_full(
506 knot_holder, sp_rect_xy_set, sp_rect_xy_get, NULL,
507 SP_KNOT_SHAPE_SQUARE, SP_KNOT_MODE_XOR,
508 _("Adjust the <b>width and height</b> of the rectangle; with <b>Ctrl</b> to lock ratio "
509 "or stretch in one dimension only")
510 );
512 sp_pat_knot_holder(item, knot_holder);
513 return knot_holder;
514 }
516 /* SPArc */
518 /*
519 * return values:
520 * 1 : inside
521 * 0 : on the curves
522 * -1 : outside
523 */
524 static gint
525 sp_genericellipse_side(SPGenericEllipse *ellipse, NR::Point const &p)
526 {
527 gdouble dx = (p[NR::X] - ellipse->cx.computed) / ellipse->rx.computed;
528 gdouble dy = (p[NR::Y] - ellipse->cy.computed) / ellipse->ry.computed;
530 gdouble s = dx * dx + dy * dy;
531 if (s < 1.0) return 1;
532 if (s > 1.0) return -1;
533 return 0;
534 }
536 static void
537 sp_arc_start_set(SPItem *item, NR::Point const &p, NR::Point const &origin, guint state)
538 {
539 int snaps = prefs_get_int_attribute("options.rotationsnapsperpi", "value", 12);
541 SPGenericEllipse *ge = SP_GENERICELLIPSE(item);
542 SPArc *arc = SP_ARC(item);
544 ge->closed = (sp_genericellipse_side(ge, p) == -1) ? TRUE : FALSE;
546 NR::Point delta = p - NR::Point(ge->cx.computed, ge->cy.computed);
547 NR::scale sc(ge->rx.computed, ge->ry.computed);
548 ge->start = atan2(delta * sc.inverse());
549 if ( ( state & GDK_CONTROL_MASK )
550 && snaps )
551 {
552 ge->start = sp_round(ge->start, M_PI/snaps);
553 }
554 sp_genericellipse_normalize(ge);
555 ((SPObject *)arc)->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
556 }
558 static NR::Point sp_arc_start_get(SPItem *item)
559 {
560 SPGenericEllipse *ge = SP_GENERICELLIPSE(item);
561 SPArc *arc = SP_ARC(item);
563 return sp_arc_get_xy(arc, ge->start);
564 }
566 static void
567 sp_arc_end_set(SPItem *item, NR::Point const &p, NR::Point const &origin, guint state)
568 {
569 int snaps = prefs_get_int_attribute("options.rotationsnapsperpi", "value", 12);
571 SPGenericEllipse *ge = SP_GENERICELLIPSE(item);
572 SPArc *arc = SP_ARC(item);
574 ge->closed = (sp_genericellipse_side(ge, p) == -1) ? TRUE : FALSE;
576 NR::Point delta = p - NR::Point(ge->cx.computed, ge->cy.computed);
577 NR::scale sc(ge->rx.computed, ge->ry.computed);
578 ge->end = atan2(delta * sc.inverse());
579 if ( ( state & GDK_CONTROL_MASK )
580 && snaps )
581 {
582 ge->end = sp_round(ge->end, M_PI/snaps);
583 }
584 sp_genericellipse_normalize(ge);
585 ((SPObject *)arc)->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
586 }
588 static NR::Point sp_arc_end_get(SPItem *item)
589 {
590 SPGenericEllipse *ge = SP_GENERICELLIPSE(item);
591 SPArc *arc = SP_ARC(item);
593 return sp_arc_get_xy(arc, ge->end);
594 }
596 static void
597 sp_arc_startend_click(SPItem *item, guint state)
598 {
599 SPGenericEllipse *ge = SP_GENERICELLIPSE(item);
601 if (state & GDK_SHIFT_MASK) {
602 ge->end = ge->start = 0;
603 ((SPObject *)ge)->updateRepr();
604 }
605 }
608 static void
609 sp_arc_rx_set(SPItem *item, NR::Point const &p, NR::Point const &origin, guint state)
610 {
611 SPGenericEllipse *ge = SP_GENERICELLIPSE(item);
612 SPArc *arc = SP_ARC(item);
614 ge->rx.computed = fabs( ge->cx.computed - p[NR::X] );
616 if ( state & GDK_CONTROL_MASK ) {
617 ge->ry.computed = ge->rx.computed;
618 }
620 ((SPObject *)arc)->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
621 }
623 static NR::Point sp_arc_rx_get(SPItem *item)
624 {
625 SPGenericEllipse *ge = SP_GENERICELLIPSE(item);
627 return (NR::Point(ge->cx.computed, ge->cy.computed) - NR::Point(ge->rx.computed, 0));
628 }
630 static void
631 sp_arc_ry_set(SPItem *item, NR::Point const &p, NR::Point const &origin, guint state)
632 {
633 SPGenericEllipse *ge = SP_GENERICELLIPSE(item);
634 SPArc *arc = SP_ARC(item);
636 ge->ry.computed = fabs( ge->cy.computed - p[NR::Y] );
638 if ( state & GDK_CONTROL_MASK ) {
639 ge->rx.computed = ge->ry.computed;
640 }
642 ((SPObject *)arc)->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
643 }
645 static NR::Point sp_arc_ry_get(SPItem *item)
646 {
647 SPGenericEllipse *ge = SP_GENERICELLIPSE(item);
649 return (NR::Point(ge->cx.computed, ge->cy.computed) - NR::Point(0, ge->ry.computed));
650 }
652 static void
653 sp_arc_rx_click(SPItem *item, guint state)
654 {
655 SPGenericEllipse *ge = SP_GENERICELLIPSE(item);
657 if (state & GDK_CONTROL_MASK) {
658 ge->ry.computed = ge->rx.computed;
659 ((SPObject *)ge)->updateRepr();
660 }
661 }
663 static void
664 sp_arc_ry_click(SPItem *item, guint state)
665 {
666 SPGenericEllipse *ge = SP_GENERICELLIPSE(item);
668 if (state & GDK_CONTROL_MASK) {
669 ge->rx.computed = ge->ry.computed;
670 ((SPObject *)ge)->updateRepr();
671 }
672 }
674 static SPKnotHolder *
675 sp_arc_knot_holder(SPItem *item, SPDesktop *desktop)
676 {
677 SPKnotHolder *knot_holder = sp_knot_holder_new(desktop, item, NULL);
679 sp_knot_holder_add_full(knot_holder, sp_arc_rx_set, sp_arc_rx_get, sp_arc_rx_click,
680 SP_KNOT_SHAPE_SQUARE, SP_KNOT_MODE_XOR,
681 _("Adjust ellipse <b>width</b>, with <b>Ctrl</b> to make circle"));
682 sp_knot_holder_add_full(knot_holder, sp_arc_ry_set, sp_arc_ry_get, sp_arc_ry_click,
683 SP_KNOT_SHAPE_SQUARE, SP_KNOT_MODE_XOR,
684 _("Adjust ellipse <b>height</b>, with <b>Ctrl</b> to make circle"));
685 sp_knot_holder_add_full(knot_holder, sp_arc_start_set, sp_arc_start_get, sp_arc_startend_click,
686 SP_KNOT_SHAPE_CIRCLE, SP_KNOT_MODE_XOR,
687 _("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"));
688 sp_knot_holder_add_full(knot_holder, sp_arc_end_set, sp_arc_end_get, sp_arc_startend_click,
689 SP_KNOT_SHAPE_CIRCLE, SP_KNOT_MODE_XOR,
690 _("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"));
692 sp_pat_knot_holder(item, knot_holder);
694 return knot_holder;
695 }
697 /* SPStar */
699 static void
700 sp_star_knot1_set(SPItem *item, NR::Point const &p, NR::Point const &origin, guint state)
701 {
702 SPStar *star = SP_STAR(item);
704 NR::Point d = p - star->center;
706 double arg1 = atan2(d);
707 double darg1 = arg1 - star->arg[0];
709 if (state & GDK_MOD1_MASK) {
710 star->randomized = darg1/(star->arg[0] - star->arg[1]);
711 } else if (state & GDK_SHIFT_MASK) {
712 star->rounded = darg1/(star->arg[0] - star->arg[1]);
713 } else if (state & GDK_CONTROL_MASK) {
714 star->r[0] = L2(d);
715 } else {
716 star->r[0] = L2(d);
717 star->arg[0] = arg1;
718 star->arg[1] += darg1;
719 }
720 ((SPObject *)star)->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
721 }
723 static void
724 sp_star_knot2_set(SPItem *item, NR::Point const &p, NR::Point const &origin, guint state)
725 {
726 SPStar *star = SP_STAR(item);
727 if (star->flatsided == false) {
728 NR::Point d = p - star->center;
730 double arg1 = atan2(d);
731 double darg1 = arg1 - star->arg[1];
733 if (state & GDK_MOD1_MASK) {
734 star->randomized = darg1/(star->arg[0] - star->arg[1]);
735 } else if (state & GDK_SHIFT_MASK) {
736 star->rounded = fabs(darg1/(star->arg[0] - star->arg[1]));
737 } else if (state & GDK_CONTROL_MASK) {
738 star->r[1] = L2(d);
739 star->arg[1] = star->arg[0] + M_PI / star->sides;
740 }
741 else {
742 star->r[1] = L2(d);
743 star->arg[1] = atan2(d);
744 }
745 ((SPObject *)star)->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
746 }
747 }
749 static NR::Point sp_star_knot1_get(SPItem *item)
750 {
751 g_assert(item != NULL);
753 SPStar *star = SP_STAR(item);
755 return sp_star_get_xy(star, SP_STAR_POINT_KNOT1, 0);
757 }
759 static NR::Point sp_star_knot2_get(SPItem *item)
760 {
761 g_assert(item != NULL);
763 SPStar *star = SP_STAR(item);
765 return sp_star_get_xy(star, SP_STAR_POINT_KNOT2, 0);
766 }
768 static void
769 sp_star_knot_click(SPItem *item, guint state)
770 {
771 SPStar *star = SP_STAR(item);
773 if (state & GDK_MOD1_MASK) {
774 star->randomized = 0;
775 ((SPObject *)star)->updateRepr();
776 } else if (state & GDK_SHIFT_MASK) {
777 star->rounded = 0;
778 ((SPObject *)star)->updateRepr();
779 } else if (state & GDK_CONTROL_MASK) {
780 star->arg[1] = star->arg[0] + M_PI / star->sides;
781 ((SPObject *)star)->updateRepr();
782 }
783 }
785 static SPKnotHolder *
786 sp_star_knot_holder(SPItem *item, SPDesktop *desktop)
787 {
788 /* we don't need to get parent knot_holder */
789 SPKnotHolder *knot_holder = sp_knot_holder_new(desktop, item, NULL);
790 g_assert(item != NULL);
792 SPStar *star = SP_STAR(item);
794 sp_knot_holder_add(knot_holder, sp_star_knot1_set, sp_star_knot1_get, sp_star_knot_click,
795 _("Adjust the <b>tip radius</b> of the star or polygon; with <b>Shift</b> to round; with <b>Alt</b> to randomize"));
796 if (star->flatsided == false)
797 sp_knot_holder_add(knot_holder, sp_star_knot2_set, sp_star_knot2_get, sp_star_knot_click,
798 _("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"));
800 sp_pat_knot_holder(item, knot_holder);
802 return knot_holder;
803 }
805 /* SPSpiral */
807 /*
808 * set attributes via inner (t=t0) knot point:
809 * [default] increase/decrease inner point
810 * [shift] increase/decrease inner and outer arg synchronizely
811 * [control] constrain inner arg to round per PI/4
812 */
813 static void
814 sp_spiral_inner_set(SPItem *item, NR::Point const &p, NR::Point const &origin, guint state)
815 {
816 int snaps = prefs_get_int_attribute("options.rotationsnapsperpi", "value", 12);
818 SPSpiral *spiral = SP_SPIRAL(item);
820 gdouble dx = p[NR::X] - spiral->cx;
821 gdouble dy = p[NR::Y] - spiral->cy;
823 if (state & GDK_MOD1_MASK) {
824 // adjust divergence by vertical drag, relative to rad
825 double new_exp = (spiral->rad + dy)/(spiral->rad);
826 spiral->exp = new_exp > 0? new_exp : 0;
827 } else {
828 // roll/unroll from inside
829 gdouble arg_t0;
830 sp_spiral_get_polar(spiral, spiral->t0, NULL, &arg_t0);
832 gdouble arg_tmp = atan2(dy, dx) - arg_t0;
833 gdouble arg_t0_new = arg_tmp - floor((arg_tmp+M_PI)/(2.0*M_PI))*2.0*M_PI + arg_t0;
834 spiral->t0 = (arg_t0_new - spiral->arg) / (2.0*M_PI*spiral->revo);
836 /* round inner arg per PI/snaps, if CTRL is pressed */
837 if ( ( state & GDK_CONTROL_MASK )
838 && ( fabs(spiral->revo) > SP_EPSILON_2 )
839 && ( snaps != 0 ) ) {
840 gdouble arg = 2.0*M_PI*spiral->revo*spiral->t0 + spiral->arg;
841 spiral->t0 = (sp_round(arg, M_PI/snaps) - spiral->arg)/(2.0*M_PI*spiral->revo);
842 }
844 spiral->t0 = CLAMP(spiral->t0, 0.0, 0.999);
845 }
847 ((SPObject *)spiral)->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
848 }
850 /*
851 * set attributes via outer (t=1) knot point:
852 * [default] increase/decrease revolution factor
853 * [control] constrain inner arg to round per PI/4
854 */
855 static void
856 sp_spiral_outer_set(SPItem *item, NR::Point const &p, NR::Point const &origin, guint state)
857 {
858 int snaps = prefs_get_int_attribute("options.rotationsnapsperpi", "value", 12);
860 SPSpiral *spiral = SP_SPIRAL(item);
862 gdouble dx = p[NR::X] - spiral->cx;
863 gdouble dy = p[NR::Y] - spiral->cy;
865 if (state & GDK_SHIFT_MASK) { // rotate without roll/unroll
866 spiral->arg = atan2(dy, dx) - 2.0*M_PI*spiral->revo;
867 if (!(state & GDK_MOD1_MASK)) {
868 // if alt not pressed, change also rad; otherwise it is locked
869 spiral->rad = MAX(hypot(dx, dy), 0.001);
870 }
871 if ( ( state & GDK_CONTROL_MASK )
872 && snaps ) {
873 spiral->arg = sp_round(spiral->arg, M_PI/snaps);
874 }
875 } else { // roll/unroll
876 // arg of the spiral outer end
877 double arg_1;
878 sp_spiral_get_polar(spiral, 1, NULL, &arg_1);
880 // its fractional part after the whole turns are subtracted
881 double arg_r = arg_1 - sp_round(arg_1, 2.0*M_PI);
883 // arg of the mouse point relative to spiral center
884 double mouse_angle = atan2(dy, dx);
885 if (mouse_angle < 0)
886 mouse_angle += 2*M_PI;
888 // snap if ctrl
889 if ( ( state & GDK_CONTROL_MASK ) && snaps ) {
890 mouse_angle = sp_round(mouse_angle, M_PI/snaps);
891 }
893 // by how much we want to rotate the outer point
894 double diff = mouse_angle - arg_r;
895 if (diff > M_PI)
896 diff -= 2*M_PI;
897 else if (diff < -M_PI)
898 diff += 2*M_PI;
900 // calculate the new rad;
901 // the value of t corresponding to the angle arg_1 + diff:
902 double t_temp = ((arg_1 + diff) - spiral->arg)/(2*M_PI*spiral->revo);
903 // the rad at that t:
904 double rad_new = 0;
905 if (t_temp > spiral->t0)
906 sp_spiral_get_polar(spiral, t_temp, &rad_new, NULL);
908 // change the revo (converting diff from radians to the number of turns)
909 spiral->revo += diff/(2*M_PI);
910 if (spiral->revo < 1e-3)
911 spiral->revo = 1e-3;
913 // if alt not pressed and the values are sane, change the rad
914 if (!(state & GDK_MOD1_MASK) && rad_new > 1e-3 && rad_new/spiral->rad < 2) {
915 // adjust t0 too so that the inner point stays unmoved
916 double r0;
917 sp_spiral_get_polar(spiral, spiral->t0, &r0, NULL);
918 spiral->rad = rad_new;
919 spiral->t0 = pow(r0 / spiral->rad, 1.0/spiral->exp);
920 }
921 if (!isFinite(spiral->t0)) spiral->t0 = 0.0;
922 spiral->t0 = CLAMP(spiral->t0, 0.0, 0.999);
923 }
925 ((SPObject *)spiral)->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
926 }
928 static NR::Point sp_spiral_inner_get(SPItem *item)
929 {
930 SPSpiral *spiral = SP_SPIRAL(item);
932 return sp_spiral_get_xy(spiral, spiral->t0);
933 }
935 static NR::Point sp_spiral_outer_get(SPItem *item)
936 {
937 SPSpiral *spiral = SP_SPIRAL(item);
939 return sp_spiral_get_xy(spiral, 1.0);
940 }
942 static void
943 sp_spiral_inner_click(SPItem *item, guint state)
944 {
945 SPSpiral *spiral = SP_SPIRAL(item);
947 if (state & GDK_MOD1_MASK) {
948 spiral->exp = 1;
949 ((SPObject *)spiral)->updateRepr();
950 } else if (state & GDK_SHIFT_MASK) {
951 spiral->t0 = 0;
952 ((SPObject *)spiral)->updateRepr();
953 }
954 }
956 static SPKnotHolder *
957 sp_spiral_knot_holder(SPItem *item, SPDesktop *desktop)
958 {
959 SPKnotHolder *knot_holder = sp_knot_holder_new(desktop, item, NULL);
961 sp_knot_holder_add(knot_holder, sp_spiral_inner_set, sp_spiral_inner_get, sp_spiral_inner_click,
962 _("Roll/unroll the spiral from <b>inside</b>; with <b>Ctrl</b> to snap angle; with <b>Alt</b> to converge/diverge"));
963 sp_knot_holder_add(knot_holder, sp_spiral_outer_set, sp_spiral_outer_get, NULL,
964 _("Roll/unroll the spiral from <b>outside</b>; with <b>Ctrl</b> to snap angle; with <b>Shift</b> to scale/rotate"));
966 sp_pat_knot_holder(item, knot_holder);
968 return knot_holder;
969 }
971 /* SPOffset */
973 static void
974 sp_offset_offset_set(SPItem *item, NR::Point const &p, NR::Point const &origin, guint state)
975 {
976 SPOffset *offset = SP_OFFSET(item);
978 offset->rad = sp_offset_distance_to_original(offset, p);
979 offset->knot = p;
980 offset->knotSet = true;
982 ((SPObject *)offset)->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
983 }
986 static NR::Point sp_offset_offset_get(SPItem *item)
987 {
988 SPOffset *offset = SP_OFFSET(item);
990 NR::Point np;
991 sp_offset_top_point(offset,&np);
992 return np;
993 }
995 static SPKnotHolder *
996 sp_offset_knot_holder(SPItem *item, SPDesktop *desktop)
997 {
998 SPKnotHolder *knot_holder = sp_knot_holder_new(desktop, item, NULL);
1000 sp_knot_holder_add(knot_holder, sp_offset_offset_set, sp_offset_offset_get, NULL,
1001 _("Adjust the <b>offset distance</b>"));
1003 sp_pat_knot_holder(item, knot_holder);
1005 return knot_holder;
1006 }
1008 static SPKnotHolder *
1009 sp_path_knot_holder(SPItem *item, SPDesktop *desktop) // FIXME: eliminate, instead make a pattern-drag similar to gradient-drag
1010 {
1011 if ((SP_OBJECT(item)->style->fill.type == SP_PAINT_TYPE_PAINTSERVER)
1012 && SP_IS_PATTERN(SP_STYLE_FILL_SERVER(SP_OBJECT(item)->style)))
1013 {
1014 SPKnotHolder *knot_holder = sp_knot_holder_new(desktop, item, NULL);
1016 sp_pat_knot_holder(item, knot_holder);
1018 return knot_holder;
1019 }
1020 return NULL;
1021 }
1023 static void
1024 sp_pat_knot_holder(SPItem *item, SPKnotHolder *knot_holder)
1025 {
1026 if ((SP_OBJECT(item)->style->fill.type == SP_PAINT_TYPE_PAINTSERVER)
1027 && SP_IS_PATTERN(SP_STYLE_FILL_SERVER(SP_OBJECT(item)->style)))
1028 {
1029 sp_knot_holder_add_full(knot_holder, sp_pattern_xy_set, sp_pattern_xy_get, NULL, SP_KNOT_SHAPE_CROSS, SP_KNOT_MODE_XOR,
1030 // TRANSLATORS: This refers to the pattern that's inside the object
1031 _("<b>Move</b> the pattern fill inside the object"));
1032 sp_knot_holder_add_full(knot_holder, sp_pattern_scale_set, sp_pattern_scale_get, NULL, SP_KNOT_SHAPE_SQUARE, SP_KNOT_MODE_XOR,
1033 _("<b>Scale</b> the pattern fill uniformly"));
1034 sp_knot_holder_add_full(knot_holder, sp_pattern_angle_set, sp_pattern_angle_get, NULL, SP_KNOT_SHAPE_CIRCLE, SP_KNOT_MODE_XOR,
1035 _("<b>Rotate</b> the pattern fill; with <b>Ctrl</b> to snap angle"));
1036 }
1037 }
1039 static NR::Point sp_flowtext_corner_get(SPItem *item)
1040 {
1041 SPRect *rect = SP_RECT(item);
1043 return NR::Point(rect->x.computed + rect->width.computed, rect->y.computed + rect->height.computed);
1044 }
1046 static void
1047 sp_flowtext_corner_set(SPItem *item, NR::Point const &p, NR::Point const &origin, guint state)
1048 {
1049 SPRect *rect = SP_RECT(item);
1051 sp_rect_wh_set_internal(rect, p, origin, state);
1052 }
1054 static SPKnotHolder *
1055 sp_flowtext_knot_holder(SPItem *item, SPDesktop *desktop)
1056 {
1057 SPKnotHolder *knot_holder = sp_knot_holder_new(desktop, SP_FLOWTEXT(item)->get_frame(NULL), NULL);
1059 sp_knot_holder_add(knot_holder, sp_flowtext_corner_set, sp_flowtext_corner_get, NULL,
1060 _("Drag to resize the <b>flowed text frame</b>"));
1062 return knot_holder;
1063 }
1066 /*
1067 Local Variables:
1068 mode:c++
1069 c-file-style:"stroustrup"
1070 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
1071 indent-tabs-mode:nil
1072 fill-column:99
1073 End:
1074 */
1075 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :