227a5f0033cb4cacbceff49fa65d52c17e9064b3
1 #define __GRADIENT_DRAG_C__
3 /*
4 * On-canvas gradient dragging
5 *
6 * Authors:
7 * bulia byak <buliabyak@users.sf.net>
8 * Johan Engelen <j.b.c.engelen@ewi.utwente.nl>
9 * Jon A. Cruz <jon@joncruz.org>
10 *
11 * Copyright (C) 2007 Johan Engelen
12 * Copyright (C) 2005,2010 Authors
13 *
14 * Released under GNU GPL, read the file 'COPYING' for more information
15 */
17 #ifdef HAVE_CONFIG_H
18 #include "config.h"
19 #endif
21 #include <glibmm/i18n.h>
22 #include <cstring>
23 #include <string>
25 #include "desktop-handles.h"
26 #include "selection.h"
27 #include "desktop.h"
28 #include "desktop-style.h"
29 #include "document.h"
30 #include "display/sp-ctrlline.h"
31 #include "display/sp-canvas-util.h"
32 #include "xml/repr.h"
33 #include "svg/css-ostringstream.h"
34 #include "svg/svg.h"
35 #include "libnr/nr-point-fns.h"
36 #include "preferences.h"
37 #include "sp-item.h"
38 #include "style.h"
39 #include "knot.h"
40 #include "sp-linear-gradient.h"
41 #include "sp-radial-gradient.h"
42 #include "gradient-chemistry.h"
43 #include "gradient-drag.h"
44 #include "sp-stop.h"
45 #include "snap.h"
46 #include "sp-namedview.h"
47 #include "selection-chemistry.h"
49 #define GR_KNOT_COLOR_NORMAL 0xffffff00
50 #define GR_KNOT_COLOR_MOUSEOVER 0xff000000
51 #define GR_KNOT_COLOR_SELECTED 0x0000ff00
53 #define GR_LINE_COLOR_FILL 0x0000ff7f
54 #define GR_LINE_COLOR_STROKE 0x9999007f
56 // screen pixels between knots when they snap:
57 #define SNAP_DIST 5
59 // absolute distance between gradient points for them to become a single dragger when the drag is created:
60 #define MERGE_DIST 0.1
62 // knot shapes corresponding to GrPointType enum
63 SPKnotShapeType gr_knot_shapes [] = {
64 SP_KNOT_SHAPE_SQUARE, //POINT_LG_BEGIN
65 SP_KNOT_SHAPE_CIRCLE, //POINT_LG_END
66 SP_KNOT_SHAPE_DIAMOND, //POINT_LG_MID
67 SP_KNOT_SHAPE_SQUARE, // POINT_RG_CENTER
68 SP_KNOT_SHAPE_CIRCLE, // POINT_RG_R1
69 SP_KNOT_SHAPE_CIRCLE, // POINT_RG_R2
70 SP_KNOT_SHAPE_CROSS, // POINT_RG_FOCUS
71 SP_KNOT_SHAPE_DIAMOND, //POINT_RG_MID1
72 SP_KNOT_SHAPE_DIAMOND //POINT_RG_MID2
73 };
75 const gchar *gr_knot_descr [] = {
76 N_("Linear gradient <b>start</b>"), //POINT_LG_BEGIN
77 N_("Linear gradient <b>end</b>"),
78 N_("Linear gradient <b>mid stop</b>"),
79 N_("Radial gradient <b>center</b>"),
80 N_("Radial gradient <b>radius</b>"),
81 N_("Radial gradient <b>radius</b>"),
82 N_("Radial gradient <b>focus</b>"), // POINT_RG_FOCUS
83 N_("Radial gradient <b>mid stop</b>"),
84 N_("Radial gradient <b>mid stop</b>")
85 };
87 static void
88 gr_drag_sel_changed(Inkscape::Selection */*selection*/, gpointer data)
89 {
90 GrDrag *drag = (GrDrag *) data;
91 drag->updateDraggers ();
92 drag->updateLines ();
93 drag->updateLevels ();
94 }
96 static void
97 gr_drag_sel_modified (Inkscape::Selection */*selection*/, guint /*flags*/, gpointer data)
98 {
99 GrDrag *drag = (GrDrag *) data;
100 if (drag->local_change) {
101 drag->local_change = false;
102 } else {
103 drag->updateDraggers ();
104 }
105 drag->updateLines ();
106 drag->updateLevels ();
107 }
109 /**
110 When a _query_style_signal is received, check that \a property requests fill/stroke/opacity (otherwise
111 skip), and fill the \a style with the averaged color of all draggables of the selected dragger, if
112 any.
113 */
114 int
115 gr_drag_style_query (SPStyle *style, int property, gpointer data)
116 {
117 GrDrag *drag = (GrDrag *) data;
119 if (property != QUERY_STYLE_PROPERTY_FILL && property != QUERY_STYLE_PROPERTY_STROKE && property != QUERY_STYLE_PROPERTY_MASTEROPACITY) {
120 return QUERY_STYLE_NOTHING;
121 }
123 if (!drag->selected) {
124 return QUERY_STYLE_NOTHING;
125 } else {
126 int ret = QUERY_STYLE_NOTHING;
128 float cf[4];
129 cf[0] = cf[1] = cf[2] = cf[3] = 0;
131 int count = 0;
133 for (GList *i = drag->selected; i != NULL; i = i->next) { // for all selected draggers
134 GrDragger *d = (GrDragger *) i->data;
135 for (GSList const* j = d->draggables; j != NULL; j = j->next) { // for all draggables of dragger
136 GrDraggable *draggable = (GrDraggable *) j->data;
138 if (ret == QUERY_STYLE_NOTHING) {
139 ret = QUERY_STYLE_SINGLE;
140 } else if (ret == QUERY_STYLE_SINGLE) {
141 ret = QUERY_STYLE_MULTIPLE_AVERAGED;
142 }
144 guint32 c = sp_item_gradient_stop_query_style (draggable->item, draggable->point_type, draggable->point_i, draggable->fill_or_stroke);
145 cf[0] += SP_RGBA32_R_F (c);
146 cf[1] += SP_RGBA32_G_F (c);
147 cf[2] += SP_RGBA32_B_F (c);
148 cf[3] += SP_RGBA32_A_F (c);
150 count ++;
151 }
152 }
154 if (count) {
155 cf[0] /= count;
156 cf[1] /= count;
157 cf[2] /= count;
158 cf[3] /= count;
160 // set both fill and stroke with our stop-color and stop-opacity
161 style->fill.clear();
162 style->fill.setColor( cf[0], cf[1], cf[2] );
163 style->fill.set = TRUE;
164 style->stroke.clear();
165 style->stroke.setColor( cf[0], cf[1], cf[2] );
166 style->stroke.set = TRUE;
168 style->fill_opacity.value = SP_SCALE24_FROM_FLOAT (1.0);
169 style->fill_opacity.set = TRUE;
170 style->stroke_opacity.value = SP_SCALE24_FROM_FLOAT (1.0);
171 style->stroke_opacity.set = TRUE;
173 style->opacity.value = SP_SCALE24_FROM_FLOAT (cf[3]);
174 style->opacity.set = TRUE;
175 }
177 return ret;
178 }
179 }
181 bool
182 gr_drag_style_set (const SPCSSAttr *css, gpointer data)
183 {
184 GrDrag *drag = (GrDrag *) data;
186 if (!drag->selected)
187 return false;
189 SPCSSAttr *stop = sp_repr_css_attr_new ();
191 // See if the css contains interesting properties, and if so, translate them into the format
192 // acceptable for gradient stops
194 // any of color properties, in order of increasing priority:
195 if (css->attribute("flood-color"))
196 sp_repr_css_set_property (stop, "stop-color", css->attribute("flood-color"));
198 if (css->attribute("lighting-color"))
199 sp_repr_css_set_property (stop, "stop-color", css->attribute("lighting-color"));
201 if (css->attribute("color"))
202 sp_repr_css_set_property (stop, "stop-color", css->attribute("color"));
204 if (css->attribute("stroke") && strcmp(css->attribute("stroke"), "none"))
205 sp_repr_css_set_property (stop, "stop-color", css->attribute("stroke"));
207 if (css->attribute("fill") && strcmp(css->attribute("fill"), "none"))
208 sp_repr_css_set_property (stop, "stop-color", css->attribute("fill"));
210 if (css->attribute("stop-color"))
211 sp_repr_css_set_property (stop, "stop-color", css->attribute("stop-color"));
214 if (css->attribute("stop-opacity")) { // direct setting of stop-opacity has priority
215 sp_repr_css_set_property (stop, "stop-opacity", css->attribute("stop-opacity"));
216 } else { // multiply all opacity properties:
217 gdouble accumulated = 1.0;
218 accumulated *= sp_svg_read_percentage(css->attribute("flood-opacity"), 1.0);
219 accumulated *= sp_svg_read_percentage(css->attribute("opacity"), 1.0);
220 accumulated *= sp_svg_read_percentage(css->attribute("stroke-opacity"), 1.0);
221 accumulated *= sp_svg_read_percentage(css->attribute("fill-opacity"), 1.0);
223 Inkscape::CSSOStringStream os;
224 os << accumulated;
225 sp_repr_css_set_property (stop, "stop-opacity", os.str().c_str());
227 if ((css->attribute("fill") && !css->attribute("stroke") && !strcmp(css->attribute("fill"), "none")) ||
228 (css->attribute("stroke") && !css->attribute("fill") && !strcmp(css->attribute("stroke"), "none")))
229 sp_repr_css_set_property (stop, "stop-opacity", "0"); // if a single fill/stroke property is set to none, don't change color, set opacity to 0
230 }
232 if (!stop->attributeList()) { // nothing for us here, pass it on
233 sp_repr_css_attr_unref(stop);
234 return false;
235 }
237 for (GList const* sel = drag->selected; sel != NULL; sel = sel->next) { // for all selected draggers
238 GrDragger* dragger = (GrDragger*) sel->data;
239 for (GSList const* i = dragger->draggables; i != NULL; i = i->next) { // for all draggables of dragger
240 GrDraggable *draggable = (GrDraggable *) i->data;
242 drag->local_change = true;
243 sp_item_gradient_stop_set_style (draggable->item, draggable->point_type, draggable->point_i, draggable->fill_or_stroke, stop);
244 }
245 }
247 //sp_repr_css_print(stop);
248 sp_repr_css_attr_unref(stop);
249 return true;
250 }
252 guint32 GrDrag::getColor()
253 {
254 if (!selected) return 0;
256 float cf[4];
257 cf[0] = cf[1] = cf[2] = cf[3] = 0;
259 int count = 0;
261 for (GList *i = selected; i != NULL; i = i->next) { // for all selected draggers
262 GrDragger *d = (GrDragger *) i->data;
263 for (GSList const* j = d->draggables; j != NULL; j = j->next) { // for all draggables of dragger
264 GrDraggable *draggable = (GrDraggable *) j->data;
266 guint32 c = sp_item_gradient_stop_query_style (draggable->item, draggable->point_type, draggable->point_i, draggable->fill_or_stroke);
267 cf[0] += SP_RGBA32_R_F (c);
268 cf[1] += SP_RGBA32_G_F (c);
269 cf[2] += SP_RGBA32_B_F (c);
270 cf[3] += SP_RGBA32_A_F (c);
272 count ++;
273 }
274 }
276 if (count) {
277 cf[0] /= count;
278 cf[1] /= count;
279 cf[2] /= count;
280 cf[3] /= count;
281 }
283 return SP_RGBA32_F_COMPOSE(cf[0], cf[1], cf[2], cf[3]);
284 }
286 SPStop *
287 GrDrag::addStopNearPoint (SPItem *item, Geom::Point mouse_p, double tolerance)
288 {
289 gfloat offset; // type of SPStop.offset = gfloat
290 SPGradient *gradient;
291 bool fill_or_stroke = true;
292 bool r1_knot = false;
294 bool addknot = false;
295 do {
296 gradient = sp_item_gradient (item, fill_or_stroke);
297 if (SP_IS_LINEARGRADIENT(gradient)) {
298 Geom::Point begin = sp_item_gradient_get_coords(item, POINT_LG_BEGIN, 0, fill_or_stroke);
299 Geom::Point end = sp_item_gradient_get_coords(item, POINT_LG_END, 0, fill_or_stroke);
301 Geom::Point nearest = snap_vector_midpoint (mouse_p, begin, end, 0);
302 double dist_screen = Geom::L2 (mouse_p - nearest);
303 if ( dist_screen < tolerance ) {
304 // add the knot
305 offset = get_offset_between_points(nearest, begin, end);
306 addknot = true;
307 break; // break out of the while loop: add only one knot
308 }
309 } else if (SP_IS_RADIALGRADIENT(gradient)) {
310 Geom::Point begin = sp_item_gradient_get_coords(item, POINT_RG_CENTER, 0, fill_or_stroke);
311 Geom::Point end = sp_item_gradient_get_coords(item, POINT_RG_R1, 0, fill_or_stroke);
312 Geom::Point nearest = snap_vector_midpoint (mouse_p, begin, end, 0);
313 double dist_screen = Geom::L2 (mouse_p - nearest);
314 if ( dist_screen < tolerance ) {
315 offset = get_offset_between_points(nearest, begin, end);
316 addknot = true;
317 r1_knot = true;
318 break; // break out of the while loop: add only one knot
319 }
321 end = sp_item_gradient_get_coords(item, POINT_RG_R2, 0, fill_or_stroke);
322 nearest = snap_vector_midpoint (mouse_p, begin, end, 0);
323 dist_screen = Geom::L2 (mouse_p - nearest);
324 if ( dist_screen < tolerance ) {
325 offset = get_offset_between_points(nearest, begin, end);
326 addknot = true;
327 r1_knot = false;
328 break; // break out of the while loop: add only one knot
329 }
330 }
331 fill_or_stroke = !fill_or_stroke;
332 } while (!fill_or_stroke && !addknot) ;
334 if (addknot) {
335 SPGradient *vector = sp_gradient_get_forked_vector_if_necessary (gradient, false);
336 SPStop* prev_stop = vector->getFirstStop();
337 SPStop* next_stop = prev_stop->getNextStop();
338 guint i = 1;
339 while ( (next_stop) && (next_stop->offset < offset) ) {
340 prev_stop = next_stop;
341 next_stop = next_stop->getNextStop();
342 i++;
343 }
344 if (!next_stop) {
345 // logical error: the endstop should have offset 1 and should always be more than this offset here
346 return NULL;
347 }
350 SPStop *newstop = sp_vector_add_stop (vector, prev_stop, next_stop, offset);
351 gradient->ensureVector();
352 updateDraggers();
354 return newstop;
355 }
357 return NULL;
358 }
361 bool
362 GrDrag::dropColor(SPItem */*item*/, gchar const *c, Geom::Point p)
363 {
364 // first, see if we can drop onto one of the existing draggers
365 for (GList *i = draggers; i != NULL; i = i->next) { // for all draggables of dragger
366 GrDragger *d = (GrDragger *) i->data;
368 if (Geom::L2(p - d->point)*desktop->current_zoom() < 5) {
369 SPCSSAttr *stop = sp_repr_css_attr_new ();
370 sp_repr_css_set_property (stop, "stop-color", c);
371 sp_repr_css_set_property (stop, "stop-opacity", "1");
372 for (GSList *j = d->draggables; j != NULL; j = j->next) { // for all draggables of dragger
373 GrDraggable *draggable = (GrDraggable *) j->data;
374 local_change = true;
375 sp_item_gradient_stop_set_style (draggable->item, draggable->point_type, draggable->point_i, draggable->fill_or_stroke, stop);
376 }
377 sp_repr_css_attr_unref(stop);
378 return true;
379 }
380 }
382 // now see if we're over line and create a new stop
383 bool over_line = false;
384 SPCtrlLine *line = NULL;
385 if (lines) {
386 for (GSList *l = lines; (l != NULL) && (!over_line); l = l->next) {
387 line = (SPCtrlLine*) l->data;
388 Geom::Point nearest = snap_vector_midpoint (p, line->s, line->e, 0);
389 double dist_screen = Geom::L2 (p - nearest) * desktop->current_zoom();
390 if (line->item && dist_screen < 5) {
391 SPStop *stop = addStopNearPoint (line->item, p, 5/desktop->current_zoom());
392 if (stop) {
393 SPCSSAttr *css = sp_repr_css_attr_new ();
394 sp_repr_css_set_property (css, "stop-color", c);
395 sp_repr_css_set_property (css, "stop-opacity", "1");
396 sp_repr_css_change (SP_OBJECT_REPR (stop), css, "style");
397 return true;
398 }
399 }
400 }
401 }
403 return false;
404 }
407 GrDrag::GrDrag(SPDesktop *desktop) {
409 this->desktop = desktop;
411 this->selection = sp_desktop_selection(desktop);
413 this->draggers = NULL;
414 this->lines = NULL;
415 this->selected = NULL;
417 this->hor_levels.clear();
418 this->vert_levels.clear();
420 this->local_change = false;
422 this->sel_changed_connection = this->selection->connectChanged(
423 sigc::bind (
424 sigc::ptr_fun(&gr_drag_sel_changed),
425 (gpointer)this )
427 );
428 this->sel_modified_connection = this->selection->connectModified(
429 sigc::bind(
430 sigc::ptr_fun(&gr_drag_sel_modified),
431 (gpointer)this )
432 );
434 this->style_set_connection = this->desktop->connectSetStyle(
435 sigc::bind(
436 sigc::ptr_fun(&gr_drag_style_set),
437 (gpointer)this )
438 );
440 this->style_query_connection = this->desktop->connectQueryStyle(
441 sigc::bind(
442 sigc::ptr_fun(&gr_drag_style_query),
443 (gpointer)this )
444 );
446 this->updateDraggers ();
447 this->updateLines ();
448 this->updateLevels ();
450 if (desktop->gr_item) {
451 this->setSelected (getDraggerFor (desktop->gr_item, desktop->gr_point_type, desktop->gr_point_i, desktop->gr_fill_or_stroke));
452 }
453 }
455 GrDrag::~GrDrag()
456 {
457 this->sel_changed_connection.disconnect();
458 this->sel_modified_connection.disconnect();
459 this->style_set_connection.disconnect();
460 this->style_query_connection.disconnect();
462 if (this->selected) {
463 GrDraggable *draggable = (GrDraggable *) ((GrDragger*)this->selected->data)->draggables->data;
464 desktop->gr_item = draggable->item;
465 desktop->gr_point_type = draggable->point_type;
466 desktop->gr_point_i = draggable->point_i;
467 desktop->gr_fill_or_stroke = draggable->fill_or_stroke;
468 } else {
469 desktop->gr_item = NULL;
470 desktop->gr_point_type = 0;
471 desktop->gr_point_i = 0;
472 desktop->gr_fill_or_stroke = true;
473 }
475 deselect_all();
476 for (GList *l = this->draggers; l != NULL; l = l->next) {
477 delete ((GrDragger *) l->data);
478 }
479 g_list_free (this->draggers);
480 this->draggers = NULL;
481 this->selected = NULL;
483 for (GSList *l = this->lines; l != NULL; l = l->next) {
484 gtk_object_destroy( GTK_OBJECT (l->data));
485 }
486 g_slist_free (this->lines);
487 this->lines = NULL;
488 }
490 GrDraggable::GrDraggable (SPItem *item, guint point_type, guint point_i, bool fill_or_stroke)
491 {
492 this->item = item;
493 this->point_type = point_type;
494 this->point_i = point_i;
495 this->fill_or_stroke = fill_or_stroke;
497 g_object_ref (G_OBJECT (this->item));
498 }
500 GrDraggable::~GrDraggable ()
501 {
502 g_object_unref (G_OBJECT (this->item));
503 }
506 SPObject *
507 GrDraggable::getServer ()
508 {
509 if (!item)
510 return NULL;
512 SPObject *server = NULL;
513 if (fill_or_stroke)
514 server = SP_OBJECT_STYLE_FILL_SERVER (item);
515 else
516 server = SP_OBJECT_STYLE_STROKE_SERVER (item);
518 return server;
519 }
521 static
522 boost::optional<Geom::Point>
523 get_snap_vector (Geom::Point p, Geom::Point o, double snap, double initial)
524 {
525 double r = L2 (p - o);
526 if (r < 1e-3) {
527 return boost::optional<Geom::Point>();
528 }
530 double angle = atan2 (p - o);
531 // snap angle to snaps increments, starting from initial:
532 double a_snapped = initial + floor((angle - initial)/snap + 0.5) * snap;
533 // calculate the new position and subtract p to get the vector:
534 return (o + r * Geom::Point(cos(a_snapped), sin(a_snapped)) - p);
535 }
537 static void
538 gr_knot_moved_handler(SPKnot *knot, Geom::Point const &ppointer, guint state, gpointer data)
539 {
540 GrDragger *dragger = (GrDragger *) data;
541 GrDrag *drag = dragger->parent;
543 Geom::Point p = ppointer;
545 SPDesktop *desktop = dragger->parent->desktop;
546 SnapManager &m = desktop->namedview->snap_manager;
547 double snap_dist = m.snapprefs.getObjectTolerance() / dragger->parent->desktop->current_zoom();
549 if (state & GDK_SHIFT_MASK) {
550 // with Shift; unsnap if we carry more than one draggable
551 if (dragger->draggables && dragger->draggables->next) {
552 // create a new dragger
553 GrDragger *dr_new = new GrDragger (dragger->parent, dragger->point, NULL);
554 dragger->parent->draggers = g_list_prepend (dragger->parent->draggers, dr_new);
555 // relink to it all but the first draggable in the list
556 for (GSList const* i = dragger->draggables->next; i != NULL; i = i->next) {
557 GrDraggable *draggable = (GrDraggable *) i->data;
558 dr_new->addDraggable (draggable);
559 }
560 dr_new->updateKnotShape();
561 g_slist_free (dragger->draggables->next);
562 dragger->draggables->next = NULL;
563 dragger->updateKnotShape();
564 dragger->updateTip();
565 }
566 } else if (!(state & GDK_CONTROL_MASK)) {
567 // without Shift or Ctrl; see if we need to snap to another dragger
568 for (GList *di = dragger->parent->draggers; di != NULL; di = di->next) {
569 GrDragger *d_new = (GrDragger *) di->data;
570 if (dragger->mayMerge(d_new) && Geom::L2 (d_new->point - p) < snap_dist) {
572 // Merge draggers:
573 for (GSList const* i = dragger->draggables; i != NULL; i = i->next) { // for all draggables of dragger
574 GrDraggable *draggable = (GrDraggable *) i->data;
575 // copy draggable to d_new:
576 GrDraggable *da_new = new GrDraggable (draggable->item, draggable->point_type, draggable->point_i, draggable->fill_or_stroke);
577 d_new->addDraggable (da_new);
578 }
580 // unlink and delete this dragger
581 dragger->parent->draggers = g_list_remove (dragger->parent->draggers, dragger);
582 delete dragger;
584 // update the new merged dragger
585 d_new->fireDraggables(true, false, true);
586 d_new->parent->updateLines();
587 d_new->parent->setSelected (d_new);
588 d_new->updateKnotShape ();
589 d_new->updateTip ();
590 d_new->updateDependencies(true);
591 sp_document_done (sp_desktop_document (d_new->parent->desktop), SP_VERB_CONTEXT_GRADIENT,
592 _("Merge gradient handles"));
593 return;
594 }
595 }
596 }
598 m.setup(desktop);
599 if (!((state & GDK_SHIFT_MASK) || (state & GDK_CONTROL_MASK))) {
600 Inkscape::SnappedPoint s = m.freeSnap(Inkscape::SnapCandidatePoint(p, Inkscape::SNAPSOURCE_OTHER_HANDLE));
601 if (s.getSnapped()) {
602 p = s.getPoint();
603 sp_knot_moveto (knot, p);
604 }
605 } else if (state & GDK_CONTROL_MASK) {
606 SnappedConstraints sc;
607 Inkscape::Preferences *prefs = Inkscape::Preferences::get();
608 unsigned snaps = abs(prefs->getInt("/options/rotationsnapsperpi/value", 12));
609 /* 0 means no snapping. */
611 for (GSList const* i = dragger->draggables; i != NULL; i = i->next) {
612 GrDraggable *draggable = (GrDraggable *) i->data;
614 Geom::Point dr_snap(Geom::infinity(), Geom::infinity());
616 if (draggable->point_type == POINT_LG_BEGIN || draggable->point_type == POINT_LG_END) {
617 for (GList *di = dragger->parent->draggers; di != NULL; di = di->next) {
618 GrDragger *d_new = (GrDragger *) di->data;
619 if (d_new == dragger)
620 continue;
621 if (d_new->isA (draggable->item,
622 draggable->point_type == POINT_LG_BEGIN? POINT_LG_END : POINT_LG_BEGIN,
623 draggable->fill_or_stroke)) {
624 // found the other end of the linear gradient;
625 if (state & GDK_SHIFT_MASK) {
626 // moving linear around center
627 Geom::Point center = Geom::Point (0.5*(d_new->point + dragger->point));
628 dr_snap = center;
629 } else {
630 // moving linear around the other end
631 dr_snap = d_new->point;
632 }
633 }
634 }
635 } else if (draggable->point_type == POINT_RG_R1 || draggable->point_type == POINT_RG_R2 || draggable->point_type == POINT_RG_FOCUS) {
636 for (GList *di = dragger->parent->draggers; di != NULL; di = di->next) {
637 GrDragger *d_new = (GrDragger *) di->data;
638 if (d_new == dragger)
639 continue;
640 if (d_new->isA (draggable->item,
641 POINT_RG_CENTER,
642 draggable->fill_or_stroke)) {
643 // found the center of the radial gradient;
644 dr_snap = d_new->point;
645 }
646 }
647 } else if (draggable->point_type == POINT_RG_CENTER) {
648 // radial center snaps to hor/vert relative to its original position
649 dr_snap = dragger->point_original;
650 }
652 boost::optional<Geom::Point> snap_vector;
653 if (dr_snap.isFinite()) {
654 if (state & GDK_MOD1_MASK) {
655 // with Alt, snap to the original angle and its perpendiculars
656 snap_vector = get_snap_vector (p, dr_snap, M_PI/2, Geom::atan2 (dragger->point_original - dr_snap));
657 } else {
658 // with Ctrl, snap to M_PI/snaps
659 snap_vector = get_snap_vector (p, dr_snap, M_PI/snaps, 0);
660 }
661 if (snap_vector) {
662 Inkscape::Snapper::ConstraintLine cl(dr_snap, p + *snap_vector - dr_snap);
663 Inkscape::SnappedPoint s = m.constrainedSnap(Inkscape::SnapCandidatePoint(p + *snap_vector, Inkscape::SNAPSOURCE_OTHER_HANDLE), cl);
664 if (s.getSnapped()) {
665 s.setTransformation(s.getPoint() - p);
666 sc.points.push_back(s);
667 } else {
668 Inkscape::SnappedPoint dummy(p + *snap_vector, Inkscape::SNAPSOURCE_OTHER_HANDLE, 0, Inkscape::SNAPTARGET_CONSTRAINED_ANGLE, Geom::L2(*snap_vector), 10000, true, true, false);
669 dummy.setTransformation(*snap_vector);
670 sc.points.push_back(dummy);
671 }
672 }
673 }
674 }
676 Inkscape::SnappedPoint bsp = m.findBestSnap(Inkscape::SnapCandidatePoint(p, Inkscape::SNAPSOURCE_OTHER_HANDLE), sc, true); // snap indicator will be displayed if needed
678 if (bsp.getSnapped()) {
679 p += bsp.getTransformation();
680 sp_knot_moveto (knot, p);
681 }
682 }
684 drag->keep_selection = (bool) g_list_find(drag->selected, dragger);
685 bool scale_radial = (state & GDK_CONTROL_MASK) && (state & GDK_SHIFT_MASK);
687 if (drag->keep_selection) {
688 Geom::Point diff = p - dragger->point;
689 drag->selected_move_nowrite (diff[Geom::X], diff[Geom::Y], scale_radial);
690 } else {
691 dragger->point = p;
692 dragger->fireDraggables (false, scale_radial);
693 dragger->updateDependencies(false);
694 }
696 }
699 static void
700 gr_midpoint_limits(GrDragger *dragger, SPObject *server, Geom::Point *begin, Geom::Point *end, Geom::Point *low_lim, Geom::Point *high_lim, GSList **moving)
701 {
703 GrDrag *drag = dragger->parent;
704 // a midpoint dragger can (logically) only contain one GrDraggable
705 GrDraggable *draggable = (GrDraggable *) dragger->draggables->data;
707 // get begin and end points between which dragging is allowed:
708 // the draglimits are between knot(lowest_i - 1) and knot(highest_i + 1)
709 *moving = g_slist_append(*moving, dragger);
711 guint lowest_i = draggable->point_i;
712 guint highest_i = draggable->point_i;
713 GrDragger *lowest_dragger = dragger;
714 GrDragger *highest_dragger = dragger;
715 if (dragger->isSelected()) {
716 GrDragger* d_add;
717 while ( true )
718 {
719 d_add = drag->getDraggerFor(draggable->item, draggable->point_type, lowest_i - 1, draggable->fill_or_stroke);
720 if ( d_add && g_list_find(drag->selected, d_add) ) {
721 lowest_i = lowest_i - 1;
722 *moving = g_slist_prepend(*moving, d_add);
723 lowest_dragger = d_add;
724 } else {
725 break;
726 }
727 }
729 while ( true )
730 {
731 d_add = drag->getDraggerFor(draggable->item, draggable->point_type, highest_i + 1, draggable->fill_or_stroke);
732 if ( d_add && g_list_find(drag->selected, d_add) ) {
733 highest_i = highest_i + 1;
734 *moving = g_slist_append(*moving, d_add);
735 highest_dragger = d_add;
736 } else {
737 break;
738 }
739 }
740 }
742 if ( SP_IS_LINEARGRADIENT(server) ) {
743 guint num = SP_LINEARGRADIENT(server)->vector.stops.size();
744 GrDragger *d_temp;
745 if (lowest_i == 1) {
746 d_temp = drag->getDraggerFor (draggable->item, POINT_LG_BEGIN, 0, draggable->fill_or_stroke);
747 } else {
748 d_temp = drag->getDraggerFor (draggable->item, POINT_LG_MID, lowest_i - 1, draggable->fill_or_stroke);
749 }
750 if (d_temp)
751 *begin = d_temp->point;
753 d_temp = drag->getDraggerFor (draggable->item, POINT_LG_MID, highest_i + 1, draggable->fill_or_stroke);
754 if (d_temp == NULL) {
755 d_temp = drag->getDraggerFor (draggable->item, POINT_LG_END, num-1, draggable->fill_or_stroke);
756 }
757 if (d_temp)
758 *end = d_temp->point;
759 } else if ( SP_IS_RADIALGRADIENT(server) ) {
760 guint num = SP_RADIALGRADIENT(server)->vector.stops.size();
761 GrDragger *d_temp;
762 if (lowest_i == 1) {
763 d_temp = drag->getDraggerFor (draggable->item, POINT_RG_CENTER, 0, draggable->fill_or_stroke);
764 } else {
765 d_temp = drag->getDraggerFor (draggable->item, draggable->point_type, lowest_i - 1, draggable->fill_or_stroke);
766 }
767 if (d_temp)
768 *begin = d_temp->point;
770 d_temp = drag->getDraggerFor (draggable->item, draggable->point_type, highest_i + 1, draggable->fill_or_stroke);
771 if (d_temp == NULL) {
772 d_temp = drag->getDraggerFor (draggable->item, (draggable->point_type==POINT_RG_MID1) ? POINT_RG_R1 : POINT_RG_R2, num-1, draggable->fill_or_stroke);
773 }
774 if (d_temp)
775 *end = d_temp->point;
776 }
778 *low_lim = dragger->point - (lowest_dragger->point - *begin);
779 *high_lim = dragger->point - (highest_dragger->point - *end);
780 }
784 /**
785 Called when a midpoint knot is dragged.
786 */
787 static void
788 gr_knot_moved_midpoint_handler(SPKnot */*knot*/, Geom::Point const &ppointer, guint state, gpointer data)
789 {
790 GrDragger *dragger = (GrDragger *) data;
791 GrDrag *drag = dragger->parent;
792 // a midpoint dragger can (logically) only contain one GrDraggable
793 GrDraggable *draggable = (GrDraggable *) dragger->draggables->data;
795 // FIXME: take from prefs
796 double snap_fraction = 0.1;
798 Geom::Point p = ppointer;
799 Geom::Point begin(0,0), end(0,0);
800 Geom::Point low_lim(0,0), high_lim(0,0);
802 SPObject *server = draggable->getServer();
804 GSList *moving = NULL;
805 gr_midpoint_limits(dragger, server, &begin, &end, &low_lim, &high_lim, &moving);
807 if (state & GDK_CONTROL_MASK) {
808 p = snap_vector_midpoint (p, low_lim, high_lim, snap_fraction);
809 } else {
810 p = snap_vector_midpoint (p, low_lim, high_lim, 0);
811 if (!(state & GDK_SHIFT_MASK)) {
812 SPDesktop *desktop = dragger->parent->desktop;
813 SnapManager &m = desktop->namedview->snap_manager;
814 Inkscape::Snapper::ConstraintLine cl(low_lim, high_lim - low_lim);
815 m.constrainedSnapReturnByRef(p, Inkscape::SNAPSOURCE_OTHER_HANDLE, cl);
816 }
817 }
818 Geom::Point displacement = p - dragger->point;
820 for (GSList const* i = moving; i != NULL; i = i->next) {
821 GrDragger *drg = (GrDragger*) i->data;
822 SPKnot *drgknot = drg->knot;
823 Geom::Point this_move = displacement;
824 if (state & GDK_MOD1_MASK) {
825 // FIXME: unify all these profiles (here, in nodepath, in tweak) in one place
826 double alpha = 1.0;
827 if (Geom::L2(drg->point - dragger->point) + Geom::L2(drg->point - begin) - 1e-3 > Geom::L2(dragger->point - begin)) { // drg is on the end side from dragger
828 double x = Geom::L2(drg->point - dragger->point)/Geom::L2(end - dragger->point);
829 this_move = (0.5 * cos (M_PI * (pow(x, alpha))) + 0.5) * this_move;
830 } else { // drg is on the begin side from dragger
831 double x = Geom::L2(drg->point - dragger->point)/Geom::L2(begin - dragger->point);
832 this_move = (0.5 * cos (M_PI * (pow(x, alpha))) + 0.5) * this_move;
833 }
834 }
835 drg->point += this_move;
836 sp_knot_moveto (drgknot, drg->point);
837 drg->fireDraggables (false);
838 drg->updateDependencies(false);
839 }
841 g_slist_free(moving);
843 drag->keep_selection = dragger->isSelected();
844 }
848 static void
849 gr_knot_grabbed_handler (SPKnot */*knot*/, unsigned int /*state*/, gpointer data)
850 {
851 GrDragger *dragger = (GrDragger *) data;
853 sp_canvas_force_full_redraw_after_interruptions(dragger->parent->desktop->canvas, 5);
854 }
856 /**
857 Called when the mouse releases a dragger knot; changes gradient writing to repr, updates other draggers if needed
858 */
859 static void
860 gr_knot_ungrabbed_handler (SPKnot *knot, unsigned int state, gpointer data)
861 {
862 GrDragger *dragger = (GrDragger *) data;
864 sp_canvas_end_forced_full_redraws(dragger->parent->desktop->canvas);
866 dragger->point_original = dragger->point = knot->pos;
868 if ((state & GDK_CONTROL_MASK) && (state & GDK_SHIFT_MASK)) {
869 dragger->fireDraggables (true, true);
870 } else {
871 dragger->fireDraggables (true);
872 }
874 for (GList *i = dragger->parent->selected; i != NULL; i = i->next) {
875 GrDragger *d = (GrDragger *) i->data;
876 if (d == dragger)
877 continue;
878 d->fireDraggables (true);
879 }
881 // make this dragger selected
882 if (!dragger->parent->keep_selection) {
883 dragger->parent->setSelected (dragger);
884 }
885 dragger->parent->keep_selection = false;
887 dragger->updateDependencies(true);
889 // we did an undoable action
890 sp_document_done (sp_desktop_document (dragger->parent->desktop), SP_VERB_CONTEXT_GRADIENT,
891 _("Move gradient handle"));
892 }
894 /**
895 Called when a dragger knot is clicked; selects the dragger or deletes it depending on the
896 state of the keyboard keys
897 */
898 static void
899 gr_knot_clicked_handler(SPKnot */*knot*/, guint state, gpointer data)
900 {
901 GrDragger *dragger = (GrDragger *) data;
902 GrDraggable *draggable = (GrDraggable *) dragger->draggables->data;
903 if (!draggable) return;
905 if ( (state & GDK_CONTROL_MASK) && (state & GDK_MOD1_MASK ) ) {
906 // delete this knot from vector
907 SPGradient *gradient = sp_item_gradient (draggable->item, draggable->fill_or_stroke);
908 gradient = gradient->getVector();
909 if (gradient->vector.stops.size() > 2) { // 2 is the minimum
910 SPStop *stop = NULL;
911 switch (draggable->point_type) { // if we delete first or last stop, move the next/previous to the edge
912 case POINT_LG_BEGIN:
913 case POINT_RG_CENTER:
914 stop = gradient->getFirstStop();
915 {
916 SPStop *next = stop->getNextStop();
917 if (next) {
918 next->offset = 0;
919 sp_repr_set_css_double (SP_OBJECT_REPR (next), "offset", 0);
920 }
921 }
922 break;
923 case POINT_LG_END:
924 case POINT_RG_R1:
925 case POINT_RG_R2:
926 stop = sp_last_stop(gradient);
927 {
928 SPStop *prev = stop->getPrevStop();
929 if (prev) {
930 prev->offset = 1;
931 sp_repr_set_css_double (SP_OBJECT_REPR (prev), "offset", 1);
932 }
933 }
934 break;
935 case POINT_LG_MID:
936 case POINT_RG_MID1:
937 case POINT_RG_MID2:
938 stop = sp_get_stop_i(gradient, draggable->point_i);
939 break;
940 }
942 SP_OBJECT_REPR(gradient)->removeChild(SP_OBJECT_REPR(stop));
943 sp_document_done (SP_OBJECT_DOCUMENT (gradient), SP_VERB_CONTEXT_GRADIENT,
944 _("Delete gradient stop"));
945 }
946 } else {
947 // select the dragger
948 dragger->point_original = dragger->point;
950 if ( state & GDK_SHIFT_MASK ) {
951 dragger->parent->setSelected (dragger, true, false);
952 } else {
953 dragger->parent->setSelected (dragger);
954 }
955 }
956 }
958 /**
959 Called when a dragger knot is doubleclicked; opens gradient editor with the stop from the first draggable
960 */
961 static void
962 gr_knot_doubleclicked_handler (SPKnot */*knot*/, guint /*state*/, gpointer data)
963 {
964 GrDragger *dragger = (GrDragger *) data;
966 dragger->point_original = dragger->point;
968 if (dragger->draggables == NULL)
969 return;
971 GrDraggable *draggable = (GrDraggable *) dragger->draggables->data;
972 sp_item_gradient_edit_stop (draggable->item, draggable->point_type, draggable->point_i, draggable->fill_or_stroke);
973 }
975 /**
976 Act upon all draggables of the dragger, setting them to the dragger's point
977 */
978 void
979 GrDragger::fireDraggables (bool write_repr, bool scale_radial, bool merging_focus)
980 {
981 for (GSList const* i = this->draggables; i != NULL; i = i->next) {
982 GrDraggable *draggable = (GrDraggable *) i->data;
984 // set local_change flag so that selection_changed callback does not regenerate draggers
985 this->parent->local_change = true;
987 // change gradient, optionally writing to repr; prevent focus from moving if it's snapped
988 // to the center, unless it's the first update upon merge when we must snap it to the point
989 if (merging_focus ||
990 !(draggable->point_type == POINT_RG_FOCUS && this->isA(draggable->item, POINT_RG_CENTER, draggable->point_i, draggable->fill_or_stroke)))
991 {
992 sp_item_gradient_set_coords (draggable->item, draggable->point_type, draggable->point_i, this->point, draggable->fill_or_stroke, write_repr, scale_radial);
993 }
994 }
995 }
997 /**
998 Checks if the dragger has a draggable with this point_type
999 */
1000 bool
1001 GrDragger::isA (gint point_type)
1002 {
1003 for (GSList const* i = this->draggables; i != NULL; i = i->next) {
1004 GrDraggable *draggable = (GrDraggable *) i->data;
1005 if (draggable->point_type == point_type) {
1006 return true;
1007 }
1008 }
1009 return false;
1010 }
1012 /**
1013 Checks if the dragger has a draggable with this item, point_type + point_i (number), fill_or_stroke
1014 */
1015 bool
1016 GrDragger::isA (SPItem *item, gint point_type, gint point_i, bool fill_or_stroke)
1017 {
1018 for (GSList const* i = this->draggables; i != NULL; i = i->next) {
1019 GrDraggable *draggable = (GrDraggable *) i->data;
1020 if ( (draggable->point_type == point_type) && (draggable->point_i == point_i) && (draggable->item == item) && (draggable->fill_or_stroke == fill_or_stroke) ) {
1021 return true;
1022 }
1023 }
1024 return false;
1025 }
1027 /**
1028 Checks if the dragger has a draggable with this item, point_type, fill_or_stroke
1029 */
1030 bool
1031 GrDragger::isA (SPItem *item, gint point_type, bool fill_or_stroke)
1032 {
1033 for (GSList const* i = this->draggables; i != NULL; i = i->next) {
1034 GrDraggable *draggable = (GrDraggable *) i->data;
1035 if ( (draggable->point_type == point_type) && (draggable->item == item) && (draggable->fill_or_stroke == fill_or_stroke) ) {
1036 return true;
1037 }
1038 }
1039 return false;
1040 }
1042 bool
1043 GrDraggable::mayMerge (GrDraggable *da2)
1044 {
1045 if ((this->item == da2->item) && (this->fill_or_stroke == da2->fill_or_stroke)) {
1046 // we must not merge the points of the same gradient!
1047 if (!((this->point_type == POINT_RG_FOCUS && da2->point_type == POINT_RG_CENTER) ||
1048 (this->point_type == POINT_RG_CENTER && da2->point_type == POINT_RG_FOCUS))) {
1049 // except that we can snap center and focus together
1050 return false;
1051 }
1052 }
1053 // disable merging of midpoints.
1054 if ( (this->point_type == POINT_LG_MID) || (da2->point_type == POINT_LG_MID)
1055 || (this->point_type == POINT_RG_MID1) || (da2->point_type == POINT_RG_MID1)
1056 || (this->point_type == POINT_RG_MID2) || (da2->point_type == POINT_RG_MID2) )
1057 return false;
1059 return true;
1060 }
1062 bool
1063 GrDragger::mayMerge (GrDragger *other)
1064 {
1065 if (this == other)
1066 return false;
1068 for (GSList const* i = this->draggables; i != NULL; i = i->next) { // for all draggables of this
1069 GrDraggable *da1 = (GrDraggable *) i->data;
1070 for (GSList const* j = other->draggables; j != NULL; j = j->next) { // for all draggables of other
1071 GrDraggable *da2 = (GrDraggable *) j->data;
1072 if (!da1->mayMerge(da2))
1073 return false;
1074 }
1075 }
1076 return true;
1077 }
1079 bool
1080 GrDragger::mayMerge (GrDraggable *da2)
1081 {
1082 for (GSList const* i = this->draggables; i != NULL; i = i->next) { // for all draggables of this
1083 GrDraggable *da1 = (GrDraggable *) i->data;
1084 if (!da1->mayMerge(da2))
1085 return false;
1086 }
1087 return true;
1088 }
1090 /**
1091 Updates the statusbar tip of the dragger knot, based on its draggables
1092 */
1093 void
1094 GrDragger::updateTip ()
1095 {
1096 if (this->knot && this->knot->tip) {
1097 g_free (this->knot->tip);
1098 this->knot->tip = NULL;
1099 }
1101 if (g_slist_length (this->draggables) == 1) {
1102 GrDraggable *draggable = (GrDraggable *) this->draggables->data;
1103 char *item_desc = sp_item_description(draggable->item);
1104 switch (draggable->point_type) {
1105 case POINT_LG_MID:
1106 case POINT_RG_MID1:
1107 case POINT_RG_MID2:
1108 this->knot->tip = g_strdup_printf (_("%s %d for: %s%s; drag with <b>Ctrl</b> to snap offset; click with <b>Ctrl+Alt</b> to delete stop"),
1109 _(gr_knot_descr[draggable->point_type]),
1110 draggable->point_i,
1111 item_desc,
1112 draggable->fill_or_stroke == false ? _(" (stroke)") : "");
1113 break;
1115 default:
1116 this->knot->tip = g_strdup_printf (_("%s for: %s%s; drag with <b>Ctrl</b> to snap angle, with <b>Ctrl+Alt</b> to preserve angle, with <b>Ctrl+Shift</b> to scale around center"),
1117 _(gr_knot_descr[draggable->point_type]),
1118 item_desc,
1119 draggable->fill_or_stroke == false ? _(" (stroke)") : "");
1120 break;
1121 }
1122 g_free(item_desc);
1123 } else if (g_slist_length (draggables) == 2 && isA (POINT_RG_CENTER) && isA (POINT_RG_FOCUS)) {
1124 this->knot->tip = g_strdup_printf (_("Radial gradient <b>center</b> and <b>focus</b>; drag with <b>Shift</b> to separate focus"));
1125 } else {
1126 int length = g_slist_length (this->draggables);
1127 this->knot->tip = g_strdup_printf (ngettext("Gradient point shared by <b>%d</b> gradient; drag with <b>Shift</b> to separate",
1128 "Gradient point shared by <b>%d</b> gradients; drag with <b>Shift</b> to separate",
1129 length),
1130 length);
1131 }
1132 }
1134 /**
1135 Adds a draggable to the dragger
1136 */
1137 void
1138 GrDragger::updateKnotShape ()
1139 {
1140 if (!draggables)
1141 return;
1142 GrDraggable *last = (GrDraggable *) g_slist_last(draggables)->data;
1143 g_object_set (G_OBJECT (this->knot->item), "shape", gr_knot_shapes[last->point_type], NULL);
1144 }
1146 /**
1147 Adds a draggable to the dragger
1148 */
1149 void
1150 GrDragger::addDraggable (GrDraggable *draggable)
1151 {
1152 this->draggables = g_slist_prepend (this->draggables, draggable);
1154 this->updateTip();
1155 }
1158 /**
1159 Moves this dragger to the point of the given draggable, acting upon all other draggables
1160 */
1161 void
1162 GrDragger::moveThisToDraggable (SPItem *item, gint point_type, gint point_i, bool fill_or_stroke, bool write_repr)
1163 {
1164 GrDraggable *dr_first = (GrDraggable *) this->draggables->data;
1165 if (!dr_first) return;
1167 this->point = sp_item_gradient_get_coords (dr_first->item, dr_first->point_type, dr_first->point_i, dr_first->fill_or_stroke);
1168 this->point_original = this->point;
1170 sp_knot_moveto (this->knot, this->point);
1172 for (GSList const* i = this->draggables; i != NULL; i = i->next) {
1173 GrDraggable *da = (GrDraggable *) i->data;
1174 if ( (da->item == item) &&
1175 (point_type == -1 || da->point_type == point_type) &&
1176 (point_i == -1 || da->point_i == point_i) &&
1177 (da->fill_or_stroke == fill_or_stroke) ) {
1178 continue;
1179 }
1180 sp_item_gradient_set_coords (da->item, da->point_type, da->point_i, this->point, da->fill_or_stroke, write_repr, false);
1181 }
1182 // FIXME: here we should also call this->updateDependencies(write_repr); to propagate updating, but how to prevent loops?
1183 }
1186 /**
1187 Moves all midstop draggables that depend on this one
1188 */
1189 void
1190 GrDragger::updateMidstopDependencies (GrDraggable *draggable, bool write_repr) {
1191 SPObject *server = draggable->getServer();
1192 if (!server)
1193 return;
1194 guint num = SP_GRADIENT(server)->vector.stops.size();
1195 if (num <= 2) return;
1197 if ( SP_IS_LINEARGRADIENT(server) ) {
1198 for ( guint i = 1; i < num - 1; i++ ) {
1199 this->moveOtherToDraggable (draggable->item, POINT_LG_MID, i, draggable->fill_or_stroke, write_repr);
1200 }
1201 } else if ( SP_IS_RADIALGRADIENT(server) ) {
1202 for ( guint i = 1; i < num - 1; i++ ) {
1203 this->moveOtherToDraggable (draggable->item, POINT_RG_MID1, i, draggable->fill_or_stroke, write_repr);
1204 this->moveOtherToDraggable (draggable->item, POINT_RG_MID2, i, draggable->fill_or_stroke, write_repr);
1205 }
1206 }
1207 }
1210 /**
1211 Moves all draggables that depend on this one
1212 */
1213 void
1214 GrDragger::updateDependencies (bool write_repr)
1215 {
1216 for (GSList const* i = this->draggables; i != NULL; i = i->next) {
1217 GrDraggable *draggable = (GrDraggable *) i->data;
1218 switch (draggable->point_type) {
1219 case POINT_LG_BEGIN:
1220 {
1221 // the end point is dependent only when dragging with ctrl+shift
1222 this->moveOtherToDraggable (draggable->item, POINT_LG_END, -1, draggable->fill_or_stroke, write_repr);
1224 this->updateMidstopDependencies (draggable, write_repr);
1225 }
1226 break;
1227 case POINT_LG_END:
1228 {
1229 // the begin point is dependent only when dragging with ctrl+shift
1230 this->moveOtherToDraggable (draggable->item, POINT_LG_BEGIN, 0, draggable->fill_or_stroke, write_repr);
1232 this->updateMidstopDependencies (draggable, write_repr);
1233 }
1234 break;
1235 case POINT_LG_MID:
1236 // no other nodes depend on mid points.
1237 break;
1238 case POINT_RG_R2:
1239 this->moveOtherToDraggable (draggable->item, POINT_RG_R1, -1, draggable->fill_or_stroke, write_repr);
1240 this->moveOtherToDraggable (draggable->item, POINT_RG_FOCUS, -1, draggable->fill_or_stroke, write_repr);
1241 this->updateMidstopDependencies (draggable, write_repr);
1242 break;
1243 case POINT_RG_R1:
1244 this->moveOtherToDraggable (draggable->item, POINT_RG_R2, -1, draggable->fill_or_stroke, write_repr);
1245 this->moveOtherToDraggable (draggable->item, POINT_RG_FOCUS, -1, draggable->fill_or_stroke, write_repr);
1246 this->updateMidstopDependencies (draggable, write_repr);
1247 break;
1248 case POINT_RG_CENTER:
1249 this->moveOtherToDraggable (draggable->item, POINT_RG_R1, -1, draggable->fill_or_stroke, write_repr);
1250 this->moveOtherToDraggable (draggable->item, POINT_RG_R2, -1, draggable->fill_or_stroke, write_repr);
1251 this->moveOtherToDraggable (draggable->item, POINT_RG_FOCUS, -1, draggable->fill_or_stroke, write_repr);
1252 this->updateMidstopDependencies (draggable, write_repr);
1253 break;
1254 case POINT_RG_FOCUS:
1255 // nothing can depend on that
1256 break;
1257 case POINT_RG_MID1:
1258 this->moveOtherToDraggable (draggable->item, POINT_RG_MID2, draggable->point_i, draggable->fill_or_stroke, write_repr);
1259 break;
1260 case POINT_RG_MID2:
1261 this->moveOtherToDraggable (draggable->item, POINT_RG_MID1, draggable->point_i, draggable->fill_or_stroke, write_repr);
1262 break;
1263 default:
1264 break;
1265 }
1266 }
1267 }
1271 GrDragger::GrDragger (GrDrag *parent, Geom::Point p, GrDraggable *draggable)
1272 : point(p),
1273 point_original(p)
1274 {
1275 this->draggables = NULL;
1277 this->parent = parent;
1279 // create the knot
1280 this->knot = sp_knot_new (parent->desktop, NULL);
1281 this->knot->setMode(SP_KNOT_MODE_XOR);
1282 this->knot->setFill(GR_KNOT_COLOR_NORMAL, GR_KNOT_COLOR_MOUSEOVER, GR_KNOT_COLOR_MOUSEOVER);
1283 this->knot->setStroke(0x0000007f, 0x0000007f, 0x0000007f);
1284 sp_knot_update_ctrl(this->knot);
1286 // move knot to the given point
1287 sp_knot_set_position (this->knot, p, SP_KNOT_STATE_NORMAL);
1288 sp_knot_show (this->knot);
1290 // connect knot's signals
1291 if ( (draggable) // it can be NULL if a node in unsnapped (eg. focus point unsnapped from center)
1292 // luckily, midstops never snap to other nodes so are never unsnapped...
1293 && ( (draggable->point_type == POINT_LG_MID)
1294 || (draggable->point_type == POINT_RG_MID1)
1295 || (draggable->point_type == POINT_RG_MID2) ) )
1296 {
1297 this->handler_id = g_signal_connect (G_OBJECT (this->knot), "moved", G_CALLBACK (gr_knot_moved_midpoint_handler), this);
1298 } else {
1299 this->handler_id = g_signal_connect (G_OBJECT (this->knot), "moved", G_CALLBACK (gr_knot_moved_handler), this);
1300 }
1301 g_signal_connect (G_OBJECT (this->knot), "clicked", G_CALLBACK (gr_knot_clicked_handler), this);
1302 g_signal_connect (G_OBJECT (this->knot), "doubleclicked", G_CALLBACK (gr_knot_doubleclicked_handler), this);
1303 g_signal_connect (G_OBJECT (this->knot), "grabbed", G_CALLBACK (gr_knot_grabbed_handler), this);
1304 g_signal_connect (G_OBJECT (this->knot), "ungrabbed", G_CALLBACK (gr_knot_ungrabbed_handler), this);
1306 // add the initial draggable
1307 if (draggable)
1308 this->addDraggable (draggable);
1309 updateKnotShape();
1310 }
1312 GrDragger::~GrDragger ()
1313 {
1314 // unselect if it was selected
1315 this->parent->setDeselected(this);
1317 // disconnect signals
1318 g_signal_handlers_disconnect_by_func(G_OBJECT(this->knot), (gpointer) G_CALLBACK (gr_knot_moved_handler), this);
1319 g_signal_handlers_disconnect_by_func(G_OBJECT(this->knot), (gpointer) G_CALLBACK (gr_knot_clicked_handler), this);
1320 g_signal_handlers_disconnect_by_func(G_OBJECT(this->knot), (gpointer) G_CALLBACK (gr_knot_doubleclicked_handler), this);
1321 g_signal_handlers_disconnect_by_func(G_OBJECT(this->knot), (gpointer) G_CALLBACK (gr_knot_grabbed_handler), this);
1322 g_signal_handlers_disconnect_by_func(G_OBJECT(this->knot), (gpointer) G_CALLBACK (gr_knot_ungrabbed_handler), this);
1324 /* unref should call destroy */
1325 g_object_unref (G_OBJECT (this->knot));
1327 // delete all draggables
1328 for (GSList const* i = this->draggables; i != NULL; i = i->next) {
1329 delete ((GrDraggable *) i->data);
1330 }
1331 g_slist_free (this->draggables);
1332 this->draggables = NULL;
1333 }
1335 /**
1336 Select the dragger which has the given draggable.
1337 */
1338 GrDragger *
1339 GrDrag::getDraggerFor (SPItem *item, gint point_type, gint point_i, bool fill_or_stroke)
1340 {
1341 for (GList const* i = this->draggers; i != NULL; i = i->next) {
1342 GrDragger *dragger = (GrDragger *) i->data;
1343 for (GSList const* j = dragger->draggables; j != NULL; j = j->next) {
1344 GrDraggable *da2 = (GrDraggable *) j->data;
1345 if ( (da2->item == item) &&
1346 (point_type == -1 || da2->point_type == point_type) && // -1 means this does not matter
1347 (point_i == -1 || da2->point_i == point_i) && // -1 means this does not matter
1348 (da2->fill_or_stroke == fill_or_stroke)) {
1349 return (dragger);
1350 }
1351 }
1352 }
1353 return NULL;
1354 }
1357 void
1358 GrDragger::moveOtherToDraggable (SPItem *item, gint point_type, gint point_i, bool fill_or_stroke, bool write_repr)
1359 {
1360 GrDragger *d = this->parent->getDraggerFor (item, point_type, point_i, fill_or_stroke);
1361 if (d && d != this) {
1362 d->moveThisToDraggable (item, point_type, point_i, fill_or_stroke, write_repr);
1363 }
1364 }
1367 /**
1368 Draw this dragger as selected
1369 */
1370 void
1371 GrDragger::select()
1372 {
1373 this->knot->fill [SP_KNOT_STATE_NORMAL] = GR_KNOT_COLOR_SELECTED;
1374 g_object_set (G_OBJECT (this->knot->item), "fill_color", GR_KNOT_COLOR_SELECTED, NULL);
1375 }
1377 /**
1378 Draw this dragger as normal (deselected)
1379 */
1380 void
1381 GrDragger::deselect()
1382 {
1383 this->knot->fill [SP_KNOT_STATE_NORMAL] = GR_KNOT_COLOR_NORMAL;
1384 g_object_set (G_OBJECT (this->knot->item), "fill_color", GR_KNOT_COLOR_NORMAL, NULL);
1385 }
1387 bool
1388 GrDragger::isSelected()
1389 {
1390 return g_list_find (parent->selected, this);
1391 }
1393 /**
1394 \brief Deselect all stops/draggers (private)
1395 */
1396 void
1397 GrDrag::deselect_all()
1398 {
1399 while (selected) {
1400 ( (GrDragger*) selected->data)->deselect();
1401 selected = g_list_remove(selected, selected->data);
1402 }
1403 }
1405 /**
1406 \brief Deselect all stops/draggers (public; emits signal)
1407 */
1408 void
1409 GrDrag::deselectAll()
1410 {
1411 deselect_all();
1412 this->desktop->emitToolSubselectionChanged(NULL);
1413 }
1415 /**
1416 \brief Select all stops/draggers
1417 */
1418 void
1419 GrDrag::selectAll()
1420 {
1421 for (GList *l = this->draggers; l != NULL; l = l->next) {
1422 GrDragger *d = ((GrDragger *) l->data);
1423 setSelected (d, true, true);
1424 }
1425 }
1427 /**
1428 \brief Select all stops/draggers that match the coords
1429 */
1430 void
1431 GrDrag::selectByCoords(std::vector<Geom::Point> coords)
1432 {
1433 for (GList *l = this->draggers; l != NULL; l = l->next) {
1434 GrDragger *d = ((GrDragger *) l->data);
1435 for (guint k = 0; k < coords.size(); k++) {
1436 if (Geom::L2 (d->point - coords[k]) < 1e-4) {
1437 setSelected (d, true, true);
1438 }
1439 }
1440 }
1441 }
1444 /**
1445 \brief Select all stops/draggers that fall within the rect
1446 */
1447 void
1448 GrDrag::selectRect(Geom::Rect const &r)
1449 {
1450 for (GList *l = this->draggers; l != NULL; l = l->next) {
1451 GrDragger *d = ((GrDragger *) l->data);
1452 if (r.contains(d->point)) {
1453 setSelected (d, true, true);
1454 }
1455 }
1456 }
1458 /**
1459 \brief Select a dragger
1460 \param dragger The dragger to select
1461 \param add_to_selection If true, add to selection, otherwise deselect others
1462 \param override If true, always select this node, otherwise toggle selected status
1463 */
1464 void
1465 GrDrag::setSelected (GrDragger *dragger, bool add_to_selection, bool override)
1466 {
1467 GrDragger *seldragger = NULL;
1469 if (add_to_selection) {
1470 if (!dragger) return;
1471 if (override) {
1472 if (!g_list_find(selected, dragger)) {
1473 selected = g_list_prepend(selected, dragger);
1474 }
1475 dragger->select();
1476 seldragger = dragger;
1477 } else { // toggle
1478 if (g_list_find(selected, dragger)) {
1479 selected = g_list_remove(selected, dragger);
1480 dragger->deselect();
1481 if (selected) {
1482 seldragger = (GrDragger*) selected->data; // select the dragger that is first in the list
1483 }
1484 } else {
1485 selected = g_list_prepend(selected, dragger);
1486 dragger->select();
1487 seldragger = dragger;
1488 }
1489 }
1490 } else {
1491 deselect_all();
1492 if (dragger) {
1493 selected = g_list_prepend(selected, dragger);
1494 dragger->select();
1495 seldragger = dragger;
1496 }
1497 }
1498 if (seldragger) {
1499 this->desktop->emitToolSubselectionChanged((gpointer) seldragger);
1500 }
1501 }
1503 /**
1504 \brief Deselect a dragger
1505 \param dragger The dragger to deselect
1506 */
1507 void
1508 GrDrag::setDeselected (GrDragger *dragger)
1509 {
1510 if (g_list_find(selected, dragger)) {
1511 selected = g_list_remove(selected, dragger);
1512 dragger->deselect();
1513 }
1514 this->desktop->emitToolSubselectionChanged((gpointer) (selected ? selected->data : NULL ));
1515 }
1519 /**
1520 Create a line from p1 to p2 and add it to the lines list
1521 */
1522 void
1523 GrDrag::addLine (SPItem *item, Geom::Point p1, Geom::Point p2, guint32 rgba)
1524 {
1525 SPCanvasItem *line = sp_canvas_item_new(sp_desktop_controls(this->desktop),
1526 SP_TYPE_CTRLLINE, NULL);
1527 sp_canvas_item_move_to_z(line, 0);
1528 SP_CTRLLINE(line)->item = item;
1529 sp_ctrlline_set_coords(SP_CTRLLINE(line), p1, p2);
1530 if (rgba != GR_LINE_COLOR_FILL) // fill is the default, so don't set color for it to speed up redraw
1531 sp_ctrlline_set_rgba32 (SP_CTRLLINE(line), rgba);
1532 sp_canvas_item_show (line);
1533 this->lines = g_slist_append (this->lines, line);
1534 }
1536 /**
1537 If there already exists a dragger within MERGE_DIST of p, add the draggable to it; otherwise create
1538 new dragger and add it to draggers list
1539 */
1540 void
1541 GrDrag::addDragger (GrDraggable *draggable)
1542 {
1543 Geom::Point p = sp_item_gradient_get_coords (draggable->item, draggable->point_type, draggable->point_i, draggable->fill_or_stroke);
1545 for (GList *i = this->draggers; i != NULL; i = i->next) {
1546 GrDragger *dragger = (GrDragger *) i->data;
1547 if (dragger->mayMerge (draggable) && Geom::L2 (dragger->point - p) < MERGE_DIST) {
1548 // distance is small, merge this draggable into dragger, no need to create new dragger
1549 dragger->addDraggable (draggable);
1550 dragger->updateKnotShape();
1551 return;
1552 }
1553 }
1555 GrDragger *new_dragger = new GrDragger(this, p, draggable);
1556 // fixme: draggers should be added AFTER the last one: this way tabbing through them will be from begin to end.
1557 this->draggers = g_list_append (this->draggers, new_dragger);
1558 }
1560 /**
1561 Add draggers for the radial gradient rg on item
1562 */
1563 void
1564 GrDrag::addDraggersRadial (SPRadialGradient *rg, SPItem *item, bool fill_or_stroke)
1565 {
1566 addDragger (new GrDraggable (item, POINT_RG_CENTER, 0, fill_or_stroke));
1567 guint num = rg->vector.stops.size();
1568 if (num > 2) {
1569 for ( guint i = 1; i < num - 1; i++ ) {
1570 addDragger (new GrDraggable (item, POINT_RG_MID1, i, fill_or_stroke));
1571 }
1572 }
1573 addDragger (new GrDraggable (item, POINT_RG_R1, num-1, fill_or_stroke));
1574 if (num > 2) {
1575 for ( guint i = 1; i < num - 1; i++ ) {
1576 addDragger (new GrDraggable (item, POINT_RG_MID2, i, fill_or_stroke));
1577 }
1578 }
1579 addDragger (new GrDraggable (item, POINT_RG_R2, num-1, fill_or_stroke));
1580 addDragger (new GrDraggable (item, POINT_RG_FOCUS, 0, fill_or_stroke));
1581 }
1583 /**
1584 Add draggers for the linear gradient lg on item
1585 */
1586 void
1587 GrDrag::addDraggersLinear (SPLinearGradient *lg, SPItem *item, bool fill_or_stroke)
1588 {
1589 addDragger (new GrDraggable (item, POINT_LG_BEGIN, 0, fill_or_stroke));
1590 guint num = lg->vector.stops.size();
1591 if (num > 2) {
1592 for ( guint i = 1; i < num - 1; i++ ) {
1593 addDragger (new GrDraggable (item, POINT_LG_MID, i, fill_or_stroke));
1594 }
1595 }
1596 addDragger (new GrDraggable (item, POINT_LG_END, num-1, fill_or_stroke));
1597 }
1599 /**
1600 Artificially grab the knot of this dragger; used by the gradient context
1601 */
1602 void
1603 GrDrag::grabKnot (GrDragger *dragger, gint x, gint y, guint32 etime)
1604 {
1605 if (dragger) {
1606 sp_knot_start_dragging (dragger->knot, dragger->point, x, y, etime);
1607 }
1608 }
1610 /**
1611 Artificially grab the knot of the dragger with this draggable; used by the gradient context
1612 */
1613 void
1614 GrDrag::grabKnot (SPItem *item, gint point_type, gint point_i, bool fill_or_stroke, gint x, gint y, guint32 etime)
1615 {
1616 GrDragger *dragger = getDraggerFor (item, point_type, point_i, fill_or_stroke);
1617 if (dragger) {
1618 sp_knot_start_dragging (dragger->knot, dragger->point, x, y, etime);
1619 }
1620 }
1622 /**
1623 Regenerates the draggers list from the current selection; is called when selection is changed or
1624 modified, also when a radial dragger needs to update positions of other draggers in the gradient
1625 */
1626 void
1627 GrDrag::updateDraggers ()
1628 {
1629 while (selected) {
1630 selected = g_list_remove(selected, selected->data);
1631 }
1632 // delete old draggers
1633 for (GList const* i = this->draggers; i != NULL; i = i->next) {
1634 delete ((GrDragger *) i->data);
1635 }
1636 g_list_free (this->draggers);
1637 this->draggers = NULL;
1639 g_return_if_fail (this->selection != NULL);
1641 for (GSList const* i = this->selection->itemList(); i != NULL; i = i->next) {
1643 SPItem *item = SP_ITEM(i->data);
1644 SPStyle *style = SP_OBJECT_STYLE (item);
1646 if (style && (style->fill.isPaintserver())) {
1647 SPObject *server = SP_OBJECT_STYLE_FILL_SERVER (item);
1648 if (SP_IS_LINEARGRADIENT (server)) {
1649 addDraggersLinear (SP_LINEARGRADIENT (server), item, true);
1650 } else if (SP_IS_RADIALGRADIENT (server)) {
1651 addDraggersRadial (SP_RADIALGRADIENT (server), item, true);
1652 }
1653 }
1655 if (style && (style->stroke.isPaintserver())) {
1656 SPObject *server = SP_OBJECT_STYLE_STROKE_SERVER (item);
1657 if (SP_IS_LINEARGRADIENT (server)) {
1658 addDraggersLinear (SP_LINEARGRADIENT (server), item, false);
1659 } else if (SP_IS_RADIALGRADIENT (server)) {
1660 addDraggersRadial (SP_RADIALGRADIENT (server), item, false);
1661 }
1662 }
1663 }
1664 }
1667 /**
1668 * \brief Returns true if at least one of the draggers' knots has the mouse hovering above it
1669 */
1671 bool
1672 GrDrag::mouseOver()
1673 {
1674 for (GList const* i = this->draggers; i != NULL; i = i->next) {
1675 GrDragger *d = (GrDragger *) i->data;
1676 if (d->knot && (d->knot->flags & SP_KNOT_MOUSEOVER)) {
1677 return true;
1678 }
1679 }
1680 return false;
1681 }
1682 /**
1683 Regenerates the lines list from the current selection; is called on each move of a dragger, so that
1684 lines are always in sync with the actual gradient
1685 */
1686 void
1687 GrDrag::updateLines ()
1688 {
1689 // delete old lines
1690 for (GSList const *i = this->lines; i != NULL; i = i->next) {
1691 gtk_object_destroy( GTK_OBJECT (i->data));
1692 }
1693 g_slist_free (this->lines);
1694 this->lines = NULL;
1696 g_return_if_fail (this->selection != NULL);
1698 for (GSList const* i = this->selection->itemList(); i != NULL; i = i->next) {
1700 SPItem *item = SP_ITEM(i->data);
1702 SPStyle *style = SP_OBJECT_STYLE (item);
1704 if (style && (style->fill.isPaintserver())) {
1705 SPObject *server = SP_OBJECT_STYLE_FILL_SERVER (item);
1706 if (SP_IS_LINEARGRADIENT (server)) {
1707 this->addLine (item, sp_item_gradient_get_coords (item, POINT_LG_BEGIN, 0, true), sp_item_gradient_get_coords (item, POINT_LG_END, 0, true), GR_LINE_COLOR_FILL);
1708 } else if (SP_IS_RADIALGRADIENT (server)) {
1709 Geom::Point center = sp_item_gradient_get_coords (item, POINT_RG_CENTER, 0, true);
1710 this->addLine (item, center, sp_item_gradient_get_coords (item, POINT_RG_R1, 0, true), GR_LINE_COLOR_FILL);
1711 this->addLine (item, center, sp_item_gradient_get_coords (item, POINT_RG_R2, 0, true), GR_LINE_COLOR_FILL);
1712 }
1713 }
1715 if (style && (style->stroke.isPaintserver())) {
1716 SPObject *server = SP_OBJECT_STYLE_STROKE_SERVER (item);
1717 if (SP_IS_LINEARGRADIENT (server)) {
1718 this->addLine (item, sp_item_gradient_get_coords (item, POINT_LG_BEGIN, 0, false), sp_item_gradient_get_coords (item, POINT_LG_END, 0, false), GR_LINE_COLOR_STROKE);
1719 } else if (SP_IS_RADIALGRADIENT (server)) {
1720 Geom::Point center = sp_item_gradient_get_coords (item, POINT_RG_CENTER, 0, false);
1721 this->addLine (item, center, sp_item_gradient_get_coords (item, POINT_RG_R1, 0, false), GR_LINE_COLOR_STROKE);
1722 this->addLine (item, center, sp_item_gradient_get_coords (item, POINT_RG_R2, 0, false), GR_LINE_COLOR_STROKE);
1723 }
1724 }
1725 }
1726 }
1728 /**
1729 Regenerates the levels list from the current selection
1730 */
1731 void
1732 GrDrag::updateLevels ()
1733 {
1734 hor_levels.clear();
1735 vert_levels.clear();
1737 g_return_if_fail (this->selection != NULL);
1739 for (GSList const* i = this->selection->itemList(); i != NULL; i = i->next) {
1740 SPItem *item = SP_ITEM(i->data);
1741 Geom::OptRect rect = sp_item_bbox_desktop (item);
1742 if (rect) {
1743 // Remember the edges of the bbox and the center axis
1744 hor_levels.push_back(rect->min()[Geom::Y]);
1745 hor_levels.push_back(rect->max()[Geom::Y]);
1746 hor_levels.push_back(0.5 * (rect->min()[Geom::Y] + rect->max()[Geom::Y]));
1747 vert_levels.push_back(rect->min()[Geom::X]);
1748 vert_levels.push_back(rect->max()[Geom::X]);
1749 vert_levels.push_back(0.5 * (rect->min()[Geom::X] + rect->max()[Geom::X]));
1750 }
1751 }
1752 }
1754 void
1755 GrDrag::selected_reverse_vector ()
1756 {
1757 if (selected == NULL)
1758 return;
1760 for (GSList const* i = ( (GrDragger*) selected->data )->draggables; i != NULL; i = i->next) {
1761 GrDraggable *draggable = (GrDraggable *) i->data;
1763 sp_item_gradient_reverse_vector (draggable->item, draggable->fill_or_stroke);
1764 }
1765 }
1767 void
1768 GrDrag::selected_move_nowrite (double x, double y, bool scale_radial)
1769 {
1770 selected_move (x, y, false, scale_radial);
1771 }
1773 void
1774 GrDrag::selected_move (double x, double y, bool write_repr, bool scale_radial)
1775 {
1776 if (selected == NULL)
1777 return;
1779 bool did = false;
1781 for (GList *i = selected; i != NULL; i = i->next) {
1782 GrDragger *d = (GrDragger *) i->data;
1784 if (!d->isA(POINT_LG_MID) && !d->isA(POINT_RG_MID1) && !d->isA(POINT_RG_MID2)) {
1785 // if this is an endpoint,
1787 // Moving an rg center moves its focus and radii as well.
1788 // therefore, if this is a focus or radius and if selection
1789 // contains the center as well, do not move this one
1790 if (d->isA(POINT_RG_R1) || d->isA(POINT_RG_R2) ||
1791 (d->isA(POINT_RG_FOCUS) && !d->isA(POINT_RG_CENTER))) {
1792 bool skip_radius_with_center = false;
1793 for (GList *di = selected; di != NULL; di = di->next) {
1794 GrDragger *d_new = (GrDragger *) di->data;
1795 if (d_new->isA (((GrDraggable *) d->draggables->data)->item,
1796 POINT_RG_CENTER,
1797 0,
1798 ((GrDraggable *) d->draggables->data)->fill_or_stroke)) {
1799 // FIXME: here we take into account only the first draggable!
1800 skip_radius_with_center = true;
1801 }
1802 }
1803 if (skip_radius_with_center)
1804 continue;
1805 }
1807 did = true;
1808 d->point += Geom::Point (x, y);
1809 d->point_original = d->point;
1810 sp_knot_moveto (d->knot, d->point);
1812 d->fireDraggables (write_repr, scale_radial);
1814 d->updateDependencies(write_repr);
1815 }
1816 }
1818 if (write_repr && did) {
1819 // we did an undoable action
1820 sp_document_maybe_done (sp_desktop_document (desktop), "grmoveh", SP_VERB_CONTEXT_GRADIENT,
1821 _("Move gradient handle(s)"));
1822 return;
1823 }
1825 if (!did) { // none of the end draggers are selected, so let's try to move the mids
1827 GrDragger *dragger = (GrDragger *) selected->data;
1828 // a midpoint dragger can (logically) only contain one GrDraggable
1829 GrDraggable *draggable = (GrDraggable *) dragger->draggables->data;
1831 Geom::Point begin(0,0), end(0,0);
1832 Geom::Point low_lim(0,0), high_lim(0,0);
1834 SPObject *server = draggable->getServer();
1835 GSList *moving = NULL;
1836 gr_midpoint_limits(dragger, server, &begin, &end, &low_lim, &high_lim, &moving);
1838 Geom::Point p(x, y);
1839 p = snap_vector_midpoint (dragger->point + p, low_lim, high_lim, 0);
1840 Geom::Point displacement = p - dragger->point;
1842 for (GSList const* i = moving; i != NULL; i = i->next) {
1843 GrDragger *drg = (GrDragger*) i->data;
1844 SPKnot *drgknot = drg->knot;
1845 drg->point += displacement;
1846 sp_knot_moveto (drgknot, drg->point);
1847 drg->fireDraggables (true);
1848 drg->updateDependencies(true);
1849 did = true;
1850 }
1852 g_slist_free(moving);
1854 if (write_repr && did) {
1855 // we did an undoable action
1856 sp_document_maybe_done (sp_desktop_document (desktop), "grmovem", SP_VERB_CONTEXT_GRADIENT,
1857 _("Move gradient mid stop(s)"));
1858 }
1859 }
1860 }
1862 void
1863 GrDrag::selected_move_screen (double x, double y)
1864 {
1865 gdouble zoom = desktop->current_zoom();
1866 gdouble zx = x / zoom;
1867 gdouble zy = y / zoom;
1869 selected_move (zx, zy);
1870 }
1872 /**
1873 Select the knot next to the last selected one and deselect all other selected.
1874 */
1875 GrDragger *
1876 GrDrag::select_next ()
1877 {
1878 GrDragger *d = NULL;
1879 if (selected == NULL || g_list_find(draggers, selected->data)->next == NULL) {
1880 if (draggers)
1881 d = (GrDragger *) draggers->data;
1882 } else {
1883 d = (GrDragger *) g_list_find(draggers, selected->data)->next->data;
1884 }
1885 if (d)
1886 setSelected (d);
1887 return d;
1888 }
1890 /**
1891 Select the knot previous from the last selected one and deselect all other selected.
1892 */
1893 GrDragger *
1894 GrDrag::select_prev ()
1895 {
1896 GrDragger *d = NULL;
1897 if (selected == NULL || g_list_find(draggers, selected->data)->prev == NULL) {
1898 if (draggers)
1899 d = (GrDragger *) g_list_last (draggers)->data;
1900 } else {
1901 d = (GrDragger *) g_list_find(draggers, selected->data)->prev->data;
1902 }
1903 if (d)
1904 setSelected (d);
1905 return d;
1906 }
1909 // FIXME: i.m.o. an ugly function that I just made to work, but... aargh! (Johan)
1910 void
1911 GrDrag::deleteSelected (bool just_one)
1912 {
1913 if (!selected) return;
1915 SPDocument *document = false;
1917 struct StructStopInfo {
1918 SPStop * spstop;
1919 GrDraggable * draggable;
1920 SPGradient * gradient;
1921 SPGradient * vector;
1922 };
1924 GSList *midstoplist = NULL; // list of stops that must be deleted (will be deleted first)
1925 GSList *endstoplist = NULL; // list of stops that must be deleted
1926 while (selected) {
1927 GrDragger *dragger = (GrDragger*) selected->data;
1928 for (GSList * drgble = dragger->draggables; drgble != NULL; drgble = drgble->next) {
1929 GrDraggable *draggable = (GrDraggable*) drgble->data;
1930 SPGradient *gradient = sp_item_gradient (draggable->item, draggable->fill_or_stroke);
1931 SPGradient *vector = sp_gradient_get_forked_vector_if_necessary (gradient, false);
1933 switch (draggable->point_type) {
1934 case POINT_LG_MID:
1935 case POINT_RG_MID1:
1936 case POINT_RG_MID2:
1937 {
1938 SPStop *stop = sp_get_stop_i(vector, draggable->point_i);
1939 // check if already present in list. (e.g. when both RG_MID1 and RG_MID2 were selected)
1940 bool present = false;
1941 for (GSList const * l = midstoplist; l != NULL; l = l->next) {
1942 if ( (SPStop*)l->data == stop ) {
1943 present = true;
1944 break; // no need to search further.
1945 }
1946 }
1947 if (!present)
1948 midstoplist = g_slist_append(midstoplist, stop);
1949 }
1950 break;
1951 case POINT_LG_BEGIN:
1952 case POINT_LG_END:
1953 case POINT_RG_CENTER:
1954 case POINT_RG_R1:
1955 case POINT_RG_R2:
1956 {
1957 SPStop *stop = NULL;
1958 if ( (draggable->point_type == POINT_LG_BEGIN) || (draggable->point_type == POINT_RG_CENTER) ) {
1959 stop = vector->getFirstStop();
1960 } else {
1961 stop = sp_last_stop(vector);
1962 }
1963 if (stop) {
1964 StructStopInfo *stopinfo = new StructStopInfo;
1965 stopinfo->spstop = stop;
1966 stopinfo->draggable = draggable;
1967 stopinfo->gradient = gradient;
1968 stopinfo->vector = vector;
1969 // check if already present in list. (e.g. when both R1 and R2 were selected)
1970 bool present = false;
1971 for (GSList const * l = endstoplist; l != NULL; l = l->next) {
1972 if ( ((StructStopInfo*)l->data)->spstop == stopinfo->spstop ) {
1973 present = true;
1974 break; // no need to search further.
1975 }
1976 }
1977 if (!present)
1978 endstoplist = g_slist_append(endstoplist, stopinfo);
1979 }
1980 }
1981 break;
1982 default:
1983 break;
1984 }
1985 }
1986 selected = g_list_remove(selected, dragger);
1987 if ( just_one ) break; // iterate once if just_one is set.
1988 }
1989 while (midstoplist) {
1990 SPStop *stop = (SPStop*) midstoplist->data;
1991 document = SP_OBJECT_DOCUMENT (stop);
1992 Inkscape::XML::Node * parent = SP_OBJECT_REPR(stop)->parent();
1993 parent->removeChild(SP_OBJECT_REPR(stop));
1994 midstoplist = g_slist_remove(midstoplist, stop);
1995 }
1996 while (endstoplist) {
1997 StructStopInfo *stopinfo = (StructStopInfo*) endstoplist->data;
1998 document = SP_OBJECT_DOCUMENT (stopinfo->spstop);
2000 // 2 is the minimum, cannot delete more than that without deleting the whole vector
2001 // cannot use vector->vector.stops.size() because the vector might be invalidated by deletion of a midstop
2002 // manually count the children, don't know if there already exists a function for this...
2003 int len = 0;
2004 for ( SPObject *child = sp_object_first_child(stopinfo->vector) ;
2005 child != NULL ;
2006 child = SP_OBJECT_NEXT(child) )
2007 {
2008 if ( SP_IS_STOP(child) ) len ++;
2009 }
2010 if (len > 2)
2011 {
2012 switch (stopinfo->draggable->point_type) {
2013 case POINT_LG_BEGIN:
2014 {
2015 SP_OBJECT_REPR(stopinfo->vector)->removeChild(SP_OBJECT_REPR(stopinfo->spstop));
2017 SPLinearGradient *lg = SP_LINEARGRADIENT(stopinfo->gradient);
2018 Geom::Point oldbegin = Geom::Point (lg->x1.computed, lg->y1.computed);
2019 Geom::Point end = Geom::Point (lg->x2.computed, lg->y2.computed);
2020 SPStop *stop = stopinfo->vector->getFirstStop();
2021 gdouble offset = stop->offset;
2022 Geom::Point newbegin = oldbegin + offset * (end - oldbegin);
2023 lg->x1.computed = newbegin[Geom::X];
2024 lg->y1.computed = newbegin[Geom::Y];
2026 Inkscape::XML::Node *repr = SP_OBJECT_REPR(stopinfo->gradient);
2027 sp_repr_set_svg_double(repr, "x1", lg->x1.computed);
2028 sp_repr_set_svg_double(repr, "y1", lg->y1.computed);
2029 stop->offset = 0;
2030 sp_repr_set_css_double (SP_OBJECT_REPR (stop), "offset", 0);
2032 // iterate through midstops to set new offset values such that they won't move on canvas.
2033 SPStop *laststop = sp_last_stop(stopinfo->vector);
2034 stop = stop->getNextStop();
2035 while ( stop != laststop ) {
2036 stop->offset = (stop->offset - offset)/(1 - offset);
2037 sp_repr_set_css_double (SP_OBJECT_REPR (stop), "offset", stop->offset);
2038 stop = stop->getNextStop();
2039 }
2040 }
2041 break;
2042 case POINT_LG_END:
2043 {
2044 SP_OBJECT_REPR(stopinfo->vector)->removeChild(SP_OBJECT_REPR(stopinfo->spstop));
2046 SPLinearGradient *lg = SP_LINEARGRADIENT(stopinfo->gradient);
2047 Geom::Point begin = Geom::Point (lg->x1.computed, lg->y1.computed);
2048 Geom::Point oldend = Geom::Point (lg->x2.computed, lg->y2.computed);
2049 SPStop *laststop = sp_last_stop(stopinfo->vector);
2050 gdouble offset = laststop->offset;
2051 Geom::Point newend = begin + offset * (oldend - begin);
2052 lg->x2.computed = newend[Geom::X];
2053 lg->y2.computed = newend[Geom::Y];
2055 Inkscape::XML::Node *repr = SP_OBJECT_REPR(stopinfo->gradient);
2056 sp_repr_set_svg_double(repr, "x2", lg->x2.computed);
2057 sp_repr_set_svg_double(repr, "y2", lg->y2.computed);
2058 laststop->offset = 1;
2059 sp_repr_set_css_double (SP_OBJECT_REPR (laststop), "offset", 1);
2061 // iterate through midstops to set new offset values such that they won't move on canvas.
2062 SPStop *stop = stopinfo->vector->getFirstStop();
2063 stop = stop->getNextStop();
2064 while ( stop != laststop ) {
2065 stop->offset = stop->offset / offset;
2066 sp_repr_set_css_double (SP_OBJECT_REPR (stop), "offset", stop->offset);
2067 stop = stop->getNextStop();
2068 }
2069 }
2070 break;
2071 case POINT_RG_CENTER:
2072 {
2073 SPStop *newfirst = stopinfo->spstop->getNextStop();
2074 if (newfirst) {
2075 newfirst->offset = 0;
2076 sp_repr_set_css_double (SP_OBJECT_REPR (newfirst), "offset", 0);
2077 }
2078 SP_OBJECT_REPR(stopinfo->vector)->removeChild(SP_OBJECT_REPR(stopinfo->spstop));
2079 }
2080 break;
2081 case POINT_RG_R1:
2082 case POINT_RG_R2:
2083 SP_OBJECT_REPR(stopinfo->vector)->removeChild(SP_OBJECT_REPR(stopinfo->spstop));
2085 SPRadialGradient *rg = SP_RADIALGRADIENT(stopinfo->gradient);
2086 double oldradius = rg->r.computed;
2087 SPStop *laststop = sp_last_stop(stopinfo->vector);
2088 gdouble offset = laststop->offset;
2089 double newradius = offset * oldradius;
2090 rg->r.computed = newradius;
2092 Inkscape::XML::Node *repr = SP_OBJECT_REPR(rg);
2093 sp_repr_set_svg_double(repr, "r", rg->r.computed);
2094 laststop->offset = 1;
2095 sp_repr_set_css_double (SP_OBJECT_REPR (laststop), "offset", 1);
2097 // iterate through midstops to set new offset values such that they won't move on canvas.
2098 SPStop *stop = stopinfo->vector->getFirstStop();
2099 stop = stop->getNextStop();
2100 while ( stop != laststop ) {
2101 stop->offset = stop->offset / offset;
2102 sp_repr_set_css_double (SP_OBJECT_REPR (stop), "offset", stop->offset);
2103 stop = stop->getNextStop();
2104 }
2105 break;
2106 }
2107 }
2108 else
2109 { // delete the gradient from the object. set fill to unset FIXME: set to fill of unselected node?
2110 SPCSSAttr *css = sp_repr_css_attr_new ();
2112 // stopinfo->spstop is the selected stop
2113 Inkscape::XML::Node *unselectedrepr = SP_OBJECT_REPR(stopinfo->vector)->firstChild();
2114 if (unselectedrepr == SP_OBJECT_REPR(stopinfo->spstop) ) {
2115 unselectedrepr = unselectedrepr->next();
2116 }
2118 if (unselectedrepr == NULL) {
2119 if (stopinfo->draggable->fill_or_stroke) {
2120 sp_repr_css_unset_property (css, "fill");
2121 } else {
2122 sp_repr_css_unset_property (css, "stroke");
2123 }
2124 } else {
2125 SPCSSAttr *stopcss = sp_repr_css_attr(unselectedrepr, "style");
2126 if (stopinfo->draggable->fill_or_stroke) {
2127 sp_repr_css_set_property(css, "fill", sp_repr_css_property(stopcss, "stop-color", "inkscape:unset"));
2128 sp_repr_css_set_property(css, "fill-opacity", sp_repr_css_property(stopcss, "stop-opacity", "1"));
2129 } else {
2130 sp_repr_css_set_property(css, "stroke", sp_repr_css_property(stopcss, "stop-color", "inkscape:unset"));
2131 sp_repr_css_set_property(css, "stroke-opacity", sp_repr_css_property(stopcss, "stop-opacity", "1"));
2132 }
2133 sp_repr_css_attr_unref (stopcss);
2134 }
2136 sp_repr_css_change (SP_OBJECT_REPR (stopinfo->draggable->item), css, "style");
2137 sp_repr_css_attr_unref (css);
2138 }
2140 endstoplist = g_slist_remove(endstoplist, stopinfo);
2141 delete stopinfo;
2142 }
2144 if (document) {
2145 sp_document_done ( document, SP_VERB_CONTEXT_GRADIENT, _("Delete gradient stop(s)") );
2146 }
2147 }
2150 /*
2151 Local Variables:
2152 mode:c++
2153 c-file-style:"stroustrup"
2154 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
2155 indent-tabs-mode:nil
2156 fill-column:99
2157 End:
2158 */
2159 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4 :