1 /*
2 * On-canvas gradient dragging
3 *
4 * Authors:
5 * bulia byak <buliabyak@users.sf.net>
6 * Johan Engelen <j.b.c.engelen@ewi.utwente.nl>
7 * Jon A. Cruz <jon@joncruz.org>
8 *
9 * Copyright (C) 2007 Johan Engelen
10 * Copyright (C) 2005,2010 Authors
11 *
12 * Released under GNU GPL, read the file 'COPYING' for more information
13 */
15 #ifdef HAVE_CONFIG_H
16 #include "config.h"
17 #endif
19 #include <glibmm/i18n.h>
20 #include <cstring>
21 #include <string>
23 #include "desktop-handles.h"
24 #include "selection.h"
25 #include "desktop.h"
26 #include "desktop-style.h"
27 #include "document.h"
28 #include "display/sp-ctrlline.h"
29 #include "display/sp-canvas-util.h"
30 #include "xml/repr.h"
31 #include "svg/css-ostringstream.h"
32 #include "svg/svg.h"
33 #include "libnr/nr-point-fns.h"
34 #include "preferences.h"
35 #include "sp-item.h"
36 #include "style.h"
37 #include "knot.h"
38 #include "sp-linear-gradient.h"
39 #include "sp-radial-gradient.h"
40 #include "gradient-chemistry.h"
41 #include "gradient-drag.h"
42 #include "sp-stop.h"
43 #include "snap.h"
44 #include "sp-namedview.h"
45 #include "selection-chemistry.h"
47 #define GR_KNOT_COLOR_NORMAL 0xffffff00
48 #define GR_KNOT_COLOR_MOUSEOVER 0xff000000
49 #define GR_KNOT_COLOR_SELECTED 0x0000ff00
51 #define GR_LINE_COLOR_FILL 0x0000ff7f
52 #define GR_LINE_COLOR_STROKE 0x9999007f
54 // screen pixels between knots when they snap:
55 #define SNAP_DIST 5
57 // absolute distance between gradient points for them to become a single dragger when the drag is created:
58 #define MERGE_DIST 0.1
60 // knot shapes corresponding to GrPointType enum
61 SPKnotShapeType gr_knot_shapes [] = {
62 SP_KNOT_SHAPE_SQUARE, //POINT_LG_BEGIN
63 SP_KNOT_SHAPE_CIRCLE, //POINT_LG_END
64 SP_KNOT_SHAPE_DIAMOND, //POINT_LG_MID
65 SP_KNOT_SHAPE_SQUARE, // POINT_RG_CENTER
66 SP_KNOT_SHAPE_CIRCLE, // POINT_RG_R1
67 SP_KNOT_SHAPE_CIRCLE, // POINT_RG_R2
68 SP_KNOT_SHAPE_CROSS, // POINT_RG_FOCUS
69 SP_KNOT_SHAPE_DIAMOND, //POINT_RG_MID1
70 SP_KNOT_SHAPE_DIAMOND //POINT_RG_MID2
71 };
73 const gchar *gr_knot_descr [] = {
74 N_("Linear gradient <b>start</b>"), //POINT_LG_BEGIN
75 N_("Linear gradient <b>end</b>"),
76 N_("Linear gradient <b>mid stop</b>"),
77 N_("Radial gradient <b>center</b>"),
78 N_("Radial gradient <b>radius</b>"),
79 N_("Radial gradient <b>radius</b>"),
80 N_("Radial gradient <b>focus</b>"), // POINT_RG_FOCUS
81 N_("Radial gradient <b>mid stop</b>"),
82 N_("Radial gradient <b>mid stop</b>")
83 };
85 static void
86 gr_drag_sel_changed(Inkscape::Selection */*selection*/, gpointer data)
87 {
88 GrDrag *drag = (GrDrag *) data;
89 drag->updateDraggers ();
90 drag->updateLines ();
91 drag->updateLevels ();
92 }
94 static void
95 gr_drag_sel_modified (Inkscape::Selection */*selection*/, guint /*flags*/, gpointer data)
96 {
97 GrDrag *drag = (GrDrag *) data;
98 if (drag->local_change) {
99 drag->local_change = false;
100 } else {
101 drag->updateDraggers ();
102 }
103 drag->updateLines ();
104 drag->updateLevels ();
105 }
107 /**
108 When a _query_style_signal is received, check that \a property requests fill/stroke/opacity (otherwise
109 skip), and fill the \a style with the averaged color of all draggables of the selected dragger, if
110 any.
111 */
112 int
113 gr_drag_style_query (SPStyle *style, int property, gpointer data)
114 {
115 GrDrag *drag = (GrDrag *) data;
117 if (property != QUERY_STYLE_PROPERTY_FILL && property != QUERY_STYLE_PROPERTY_STROKE && property != QUERY_STYLE_PROPERTY_MASTEROPACITY) {
118 return QUERY_STYLE_NOTHING;
119 }
121 if (!drag->selected) {
122 return QUERY_STYLE_NOTHING;
123 } else {
124 int ret = QUERY_STYLE_NOTHING;
126 float cf[4];
127 cf[0] = cf[1] = cf[2] = cf[3] = 0;
129 int count = 0;
131 for (GList *i = drag->selected; i != NULL; i = i->next) { // for all selected draggers
132 GrDragger *d = (GrDragger *) i->data;
133 for (GSList const* j = d->draggables; j != NULL; j = j->next) { // for all draggables of dragger
134 GrDraggable *draggable = (GrDraggable *) j->data;
136 if (ret == QUERY_STYLE_NOTHING) {
137 ret = QUERY_STYLE_SINGLE;
138 } else if (ret == QUERY_STYLE_SINGLE) {
139 ret = QUERY_STYLE_MULTIPLE_AVERAGED;
140 }
142 guint32 c = sp_item_gradient_stop_query_style (draggable->item, draggable->point_type, draggable->point_i, draggable->fill_or_stroke);
143 cf[0] += SP_RGBA32_R_F (c);
144 cf[1] += SP_RGBA32_G_F (c);
145 cf[2] += SP_RGBA32_B_F (c);
146 cf[3] += SP_RGBA32_A_F (c);
148 count ++;
149 }
150 }
152 if (count) {
153 cf[0] /= count;
154 cf[1] /= count;
155 cf[2] /= count;
156 cf[3] /= count;
158 // set both fill and stroke with our stop-color and stop-opacity
159 style->fill.clear();
160 style->fill.setColor( cf[0], cf[1], cf[2] );
161 style->fill.set = TRUE;
162 style->stroke.clear();
163 style->stroke.setColor( cf[0], cf[1], cf[2] );
164 style->stroke.set = TRUE;
166 style->fill_opacity.value = SP_SCALE24_FROM_FLOAT (1.0);
167 style->fill_opacity.set = TRUE;
168 style->stroke_opacity.value = SP_SCALE24_FROM_FLOAT (1.0);
169 style->stroke_opacity.set = TRUE;
171 style->opacity.value = SP_SCALE24_FROM_FLOAT (cf[3]);
172 style->opacity.set = TRUE;
173 }
175 return ret;
176 }
177 }
179 Glib::ustring GrDrag::makeStopSafeColor( gchar const *str, bool &isNull )
180 {
181 Glib::ustring colorStr;
182 if ( str ) {
183 isNull = false;
184 colorStr = str;
185 Glib::ustring::size_type pos = colorStr.find("url(#");
186 if ( pos != Glib::ustring::npos ) {
187 Glib::ustring targetName = colorStr.substr(pos + 5, colorStr.length() - 6);
188 const GSList *gradients = sp_document_get_resource_list(desktop->doc(), "gradient");
189 for (const GSList *item = gradients; item; item = item->next) {
190 SPGradient* grad = SP_GRADIENT(item->data);
191 if ( targetName == grad->getId() ) {
192 SPGradient *vect = grad->getVector();
193 SPStop *firstStop = (vect) ? vect->getFirstStop() : grad->getFirstStop();
194 if (firstStop) {
195 Glib::ustring stopColorStr;
196 if (firstStop->currentColor) {
197 stopColorStr = sp_object_get_style_property(firstStop, "color", NULL);
198 } else {
199 stopColorStr = firstStop->specified_color.toString();
200 }
201 if ( !stopColorStr.empty() ) {
202 colorStr = stopColorStr;
203 }
204 }
205 break;
206 }
207 }
208 }
209 } else {
210 isNull = true;
211 }
213 return colorStr;
214 }
216 bool GrDrag::styleSet( const SPCSSAttr *css )
217 {
218 if (!selected) {
219 return false;
220 }
222 SPCSSAttr *stop = sp_repr_css_attr_new();
224 // See if the css contains interesting properties, and if so, translate them into the format
225 // acceptable for gradient stops
227 // any of color properties, in order of increasing priority:
228 if (css->attribute("flood-color")) {
229 sp_repr_css_set_property (stop, "stop-color", css->attribute("flood-color"));
230 }
232 if (css->attribute("lighting-color")) {
233 sp_repr_css_set_property (stop, "stop-color", css->attribute("lighting-color"));
234 }
236 if (css->attribute("color")) {
237 sp_repr_css_set_property (stop, "stop-color", css->attribute("color"));
238 }
240 if (css->attribute("stroke") && strcmp(css->attribute("stroke"), "none")) {
241 sp_repr_css_set_property (stop, "stop-color", css->attribute("stroke"));
242 }
244 if (css->attribute("fill") && strcmp(css->attribute("fill"), "none")) {
245 sp_repr_css_set_property (stop, "stop-color", css->attribute("fill"));
246 }
248 if (css->attribute("stop-color")) {
249 sp_repr_css_set_property (stop, "stop-color", css->attribute("stop-color"));
250 }
252 // Make sure the style is allowed for gradient stops.
253 if ( !sp_repr_css_property_is_unset( stop, "stop-color") ) {
254 bool stopIsNull = false;
255 Glib::ustring tmp = makeStopSafeColor( sp_repr_css_property( stop, "stop-color", "" ), stopIsNull );
256 if ( !stopIsNull && !tmp.empty() ) {
257 sp_repr_css_set_property( stop, "stop-color", tmp.c_str() );
258 }
259 }
262 if (css->attribute("stop-opacity")) { // direct setting of stop-opacity has priority
263 sp_repr_css_set_property(stop, "stop-opacity", css->attribute("stop-opacity"));
264 } else { // multiply all opacity properties:
265 gdouble accumulated = 1.0;
266 accumulated *= sp_svg_read_percentage(css->attribute("flood-opacity"), 1.0);
267 accumulated *= sp_svg_read_percentage(css->attribute("opacity"), 1.0);
268 accumulated *= sp_svg_read_percentage(css->attribute("stroke-opacity"), 1.0);
269 accumulated *= sp_svg_read_percentage(css->attribute("fill-opacity"), 1.0);
271 Inkscape::CSSOStringStream os;
272 os << accumulated;
273 sp_repr_css_set_property(stop, "stop-opacity", os.str().c_str());
275 if ((css->attribute("fill") && !css->attribute("stroke") && !strcmp(css->attribute("fill"), "none")) ||
276 (css->attribute("stroke") && !css->attribute("fill") && !strcmp(css->attribute("stroke"), "none"))) {
277 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
278 }
279 }
281 if (!stop->attributeList()) { // nothing for us here, pass it on
282 sp_repr_css_attr_unref(stop);
283 return false;
284 }
286 for (GList const* sel = selected; sel != NULL; sel = sel->next) { // for all selected draggers
287 GrDragger* dragger = reinterpret_cast<GrDragger*>(sel->data);
288 for (GSList const* i = dragger->draggables; i != NULL; i = i->next) { // for all draggables of dragger
289 GrDraggable *draggable = reinterpret_cast<GrDraggable *>(i->data);
291 local_change = true;
292 sp_item_gradient_stop_set_style(draggable->item, draggable->point_type, draggable->point_i, draggable->fill_or_stroke, stop);
293 }
294 }
296 //sp_repr_css_print(stop);
297 sp_repr_css_attr_unref(stop);
298 return true;
299 }
301 guint32 GrDrag::getColor()
302 {
303 if (!selected) return 0;
305 float cf[4];
306 cf[0] = cf[1] = cf[2] = cf[3] = 0;
308 int count = 0;
310 for (GList *i = selected; i != NULL; i = i->next) { // for all selected draggers
311 GrDragger *d = (GrDragger *) i->data;
312 for (GSList const* j = d->draggables; j != NULL; j = j->next) { // for all draggables of dragger
313 GrDraggable *draggable = (GrDraggable *) j->data;
315 guint32 c = sp_item_gradient_stop_query_style (draggable->item, draggable->point_type, draggable->point_i, draggable->fill_or_stroke);
316 cf[0] += SP_RGBA32_R_F (c);
317 cf[1] += SP_RGBA32_G_F (c);
318 cf[2] += SP_RGBA32_B_F (c);
319 cf[3] += SP_RGBA32_A_F (c);
321 count ++;
322 }
323 }
325 if (count) {
326 cf[0] /= count;
327 cf[1] /= count;
328 cf[2] /= count;
329 cf[3] /= count;
330 }
332 return SP_RGBA32_F_COMPOSE(cf[0], cf[1], cf[2], cf[3]);
333 }
335 SPStop *
336 GrDrag::addStopNearPoint (SPItem *item, Geom::Point mouse_p, double tolerance)
337 {
338 gfloat offset; // type of SPStop.offset = gfloat
339 SPGradient *gradient;
340 bool fill_or_stroke = true;
341 bool r1_knot = false;
343 bool addknot = false;
344 do {
345 gradient = sp_item_gradient (item, fill_or_stroke);
346 if (SP_IS_LINEARGRADIENT(gradient)) {
347 Geom::Point begin = sp_item_gradient_get_coords(item, POINT_LG_BEGIN, 0, fill_or_stroke);
348 Geom::Point end = sp_item_gradient_get_coords(item, POINT_LG_END, 0, fill_or_stroke);
350 Geom::Point nearest = snap_vector_midpoint (mouse_p, begin, end, 0);
351 double dist_screen = Geom::L2 (mouse_p - nearest);
352 if ( dist_screen < tolerance ) {
353 // add the knot
354 offset = get_offset_between_points(nearest, begin, end);
355 addknot = true;
356 break; // break out of the while loop: add only one knot
357 }
358 } else if (SP_IS_RADIALGRADIENT(gradient)) {
359 Geom::Point begin = sp_item_gradient_get_coords(item, POINT_RG_CENTER, 0, fill_or_stroke);
360 Geom::Point end = sp_item_gradient_get_coords(item, POINT_RG_R1, 0, fill_or_stroke);
361 Geom::Point nearest = snap_vector_midpoint (mouse_p, begin, end, 0);
362 double dist_screen = Geom::L2 (mouse_p - nearest);
363 if ( dist_screen < tolerance ) {
364 offset = get_offset_between_points(nearest, begin, end);
365 addknot = true;
366 r1_knot = true;
367 break; // break out of the while loop: add only one knot
368 }
370 end = sp_item_gradient_get_coords(item, POINT_RG_R2, 0, fill_or_stroke);
371 nearest = snap_vector_midpoint (mouse_p, begin, end, 0);
372 dist_screen = Geom::L2 (mouse_p - nearest);
373 if ( dist_screen < tolerance ) {
374 offset = get_offset_between_points(nearest, begin, end);
375 addknot = true;
376 r1_knot = false;
377 break; // break out of the while loop: add only one knot
378 }
379 }
380 fill_or_stroke = !fill_or_stroke;
381 } while (!fill_or_stroke && !addknot) ;
383 if (addknot) {
384 SPGradient *vector = sp_gradient_get_forked_vector_if_necessary (gradient, false);
385 SPStop* prev_stop = vector->getFirstStop();
386 SPStop* next_stop = prev_stop->getNextStop();
387 guint i = 1;
388 while ( (next_stop) && (next_stop->offset < offset) ) {
389 prev_stop = next_stop;
390 next_stop = next_stop->getNextStop();
391 i++;
392 }
393 if (!next_stop) {
394 // logical error: the endstop should have offset 1 and should always be more than this offset here
395 return NULL;
396 }
399 SPStop *newstop = sp_vector_add_stop (vector, prev_stop, next_stop, offset);
400 gradient->ensureVector();
401 updateDraggers();
403 return newstop;
404 }
406 return NULL;
407 }
410 bool
411 GrDrag::dropColor(SPItem */*item*/, gchar const *c, Geom::Point p)
412 {
413 // Note: not sure if a null pointer can come in for the style, but handle that just in case
414 bool stopIsNull = false;
415 Glib::ustring toUse = makeStopSafeColor( c, stopIsNull );
417 // first, see if we can drop onto one of the existing draggers
418 for (GList *i = draggers; i != NULL; i = i->next) { // for all draggables of dragger
419 GrDragger *d = (GrDragger *) i->data;
421 if (Geom::L2(p - d->point)*desktop->current_zoom() < 5) {
422 SPCSSAttr *stop = sp_repr_css_attr_new ();
423 sp_repr_css_set_property( stop, "stop-color", stopIsNull ? 0 : toUse.c_str() );
424 sp_repr_css_set_property( stop, "stop-opacity", "1" );
425 for (GSList *j = d->draggables; j != NULL; j = j->next) { // for all draggables of dragger
426 GrDraggable *draggable = (GrDraggable *) j->data;
427 local_change = true;
428 sp_item_gradient_stop_set_style (draggable->item, draggable->point_type, draggable->point_i, draggable->fill_or_stroke, stop);
429 }
430 sp_repr_css_attr_unref(stop);
431 return true;
432 }
433 }
435 // now see if we're over line and create a new stop
436 bool over_line = false;
437 SPCtrlLine *line = NULL;
438 if (lines) {
439 for (GSList *l = lines; (l != NULL) && (!over_line); l = l->next) {
440 line = (SPCtrlLine*) l->data;
441 Geom::Point nearest = snap_vector_midpoint (p, line->s, line->e, 0);
442 double dist_screen = Geom::L2 (p - nearest) * desktop->current_zoom();
443 if (line->item && dist_screen < 5) {
444 SPStop *stop = addStopNearPoint (line->item, p, 5/desktop->current_zoom());
445 if (stop) {
446 SPCSSAttr *css = sp_repr_css_attr_new ();
447 sp_repr_css_set_property( css, "stop-color", stopIsNull ? 0 : toUse.c_str() );
448 sp_repr_css_set_property( css, "stop-opacity", "1" );
449 sp_repr_css_change (SP_OBJECT_REPR (stop), css, "style");
450 return true;
451 }
452 }
453 }
454 }
456 return false;
457 }
460 GrDrag::GrDrag(SPDesktop *desktop) :
461 selected(0),
462 keep_selection(false),
463 local_change(false),
464 desktop(desktop),
465 hor_levels(),
466 vert_levels(),
467 draggers(0),
468 lines(0),
469 selection(sp_desktop_selection(desktop)),
470 sel_changed_connection(),
471 sel_modified_connection(),
472 style_set_connection(),
473 style_query_connection()
474 {
475 sel_changed_connection = selection->connectChanged(
476 sigc::bind(
477 sigc::ptr_fun(&gr_drag_sel_changed),
478 (gpointer)this )
480 );
481 sel_modified_connection = selection->connectModified(
482 sigc::bind(
483 sigc::ptr_fun(&gr_drag_sel_modified),
484 (gpointer)this )
485 );
487 style_set_connection = desktop->connectSetStyle( sigc::mem_fun(*this, &GrDrag::styleSet) );
489 style_query_connection = desktop->connectQueryStyle(
490 sigc::bind(
491 sigc::ptr_fun(&gr_drag_style_query),
492 (gpointer)this )
493 );
495 updateDraggers();
496 updateLines();
497 updateLevels();
499 if (desktop->gr_item) {
500 setSelected(getDraggerFor(desktop->gr_item, desktop->gr_point_type, desktop->gr_point_i, desktop->gr_fill_or_stroke));
501 }
502 }
504 GrDrag::~GrDrag()
505 {
506 this->sel_changed_connection.disconnect();
507 this->sel_modified_connection.disconnect();
508 this->style_set_connection.disconnect();
509 this->style_query_connection.disconnect();
511 if (this->selected) {
512 GrDraggable *draggable = (GrDraggable *) ((GrDragger*)this->selected->data)->draggables->data;
513 desktop->gr_item = draggable->item;
514 desktop->gr_point_type = draggable->point_type;
515 desktop->gr_point_i = draggable->point_i;
516 desktop->gr_fill_or_stroke = draggable->fill_or_stroke;
517 } else {
518 desktop->gr_item = NULL;
519 desktop->gr_point_type = 0;
520 desktop->gr_point_i = 0;
521 desktop->gr_fill_or_stroke = true;
522 }
524 deselect_all();
525 for (GList *l = this->draggers; l != NULL; l = l->next) {
526 delete ((GrDragger *) l->data);
527 }
528 g_list_free (this->draggers);
529 this->draggers = NULL;
530 this->selected = NULL;
532 for (GSList *l = this->lines; l != NULL; l = l->next) {
533 gtk_object_destroy( GTK_OBJECT (l->data));
534 }
535 g_slist_free (this->lines);
536 this->lines = NULL;
537 }
539 GrDraggable::GrDraggable (SPItem *item, guint point_type, guint point_i, bool fill_or_stroke)
540 {
541 this->item = item;
542 this->point_type = point_type;
543 this->point_i = point_i;
544 this->fill_or_stroke = fill_or_stroke;
546 g_object_ref (G_OBJECT (this->item));
547 }
549 GrDraggable::~GrDraggable ()
550 {
551 g_object_unref (G_OBJECT (this->item));
552 }
555 SPObject *GrDraggable::getServer()
556 {
557 if (!item) {
558 return NULL;
559 }
561 SPObject *server = NULL;
562 if (fill_or_stroke) {
563 server = item->style->getFillPaintServer();
564 }else {
565 server = item->style->getStrokePaintServer();
566 }
568 return server;
569 }
571 static
572 boost::optional<Geom::Point>
573 get_snap_vector (Geom::Point p, Geom::Point o, double snap, double initial)
574 {
575 double r = L2 (p - o);
576 if (r < 1e-3) {
577 return boost::optional<Geom::Point>();
578 }
580 double angle = atan2 (p - o);
581 // snap angle to snaps increments, starting from initial:
582 double a_snapped = initial + floor((angle - initial)/snap + 0.5) * snap;
583 // calculate the new position and subtract p to get the vector:
584 return (o + r * Geom::Point(cos(a_snapped), sin(a_snapped)) - p);
585 }
587 static void
588 gr_knot_moved_handler(SPKnot *knot, Geom::Point const &ppointer, guint state, gpointer data)
589 {
590 GrDragger *dragger = (GrDragger *) data;
591 GrDrag *drag = dragger->parent;
593 Geom::Point p = ppointer;
595 SPDesktop *desktop = dragger->parent->desktop;
596 SnapManager &m = desktop->namedview->snap_manager;
597 double snap_dist = m.snapprefs.getObjectTolerance() / dragger->parent->desktop->current_zoom();
599 if (state & GDK_SHIFT_MASK) {
600 // with Shift; unsnap if we carry more than one draggable
601 if (dragger->draggables && dragger->draggables->next) {
602 // create a new dragger
603 GrDragger *dr_new = new GrDragger (dragger->parent, dragger->point, NULL);
604 dragger->parent->draggers = g_list_prepend (dragger->parent->draggers, dr_new);
605 // relink to it all but the first draggable in the list
606 for (GSList const* i = dragger->draggables->next; i != NULL; i = i->next) {
607 GrDraggable *draggable = (GrDraggable *) i->data;
608 dr_new->addDraggable (draggable);
609 }
610 dr_new->updateKnotShape();
611 g_slist_free (dragger->draggables->next);
612 dragger->draggables->next = NULL;
613 dragger->updateKnotShape();
614 dragger->updateTip();
615 }
616 } else if (!(state & GDK_CONTROL_MASK)) {
617 // without Shift or Ctrl; see if we need to snap to another dragger
618 for (GList *di = dragger->parent->draggers; di != NULL; di = di->next) {
619 GrDragger *d_new = (GrDragger *) di->data;
620 if (dragger->mayMerge(d_new) && Geom::L2 (d_new->point - p) < snap_dist) {
622 // Merge draggers:
623 for (GSList const* i = dragger->draggables; i != NULL; i = i->next) { // for all draggables of dragger
624 GrDraggable *draggable = (GrDraggable *) i->data;
625 // copy draggable to d_new:
626 GrDraggable *da_new = new GrDraggable (draggable->item, draggable->point_type, draggable->point_i, draggable->fill_or_stroke);
627 d_new->addDraggable (da_new);
628 }
630 // unlink and delete this dragger
631 dragger->parent->draggers = g_list_remove (dragger->parent->draggers, dragger);
632 delete dragger;
634 // update the new merged dragger
635 d_new->fireDraggables(true, false, true);
636 d_new->parent->updateLines();
637 d_new->parent->setSelected (d_new);
638 d_new->updateKnotShape ();
639 d_new->updateTip ();
640 d_new->updateDependencies(true);
641 sp_document_done (sp_desktop_document (d_new->parent->desktop), SP_VERB_CONTEXT_GRADIENT,
642 _("Merge gradient handles"));
643 return;
644 }
645 }
646 }
648 m.setup(desktop);
649 if (!((state & GDK_SHIFT_MASK) || (state & GDK_CONTROL_MASK))) {
650 Inkscape::SnappedPoint s = m.freeSnap(Inkscape::SnapCandidatePoint(p, Inkscape::SNAPSOURCE_OTHER_HANDLE));
651 if (s.getSnapped()) {
652 p = s.getPoint();
653 sp_knot_moveto (knot, p);
654 }
655 } else if (state & GDK_CONTROL_MASK) {
656 SnappedConstraints sc;
657 Inkscape::Preferences *prefs = Inkscape::Preferences::get();
658 unsigned snaps = abs(prefs->getInt("/options/rotationsnapsperpi/value", 12));
659 /* 0 means no snapping. */
661 for (GSList const* i = dragger->draggables; i != NULL; i = i->next) {
662 GrDraggable *draggable = (GrDraggable *) i->data;
664 Geom::Point dr_snap(Geom::infinity(), Geom::infinity());
666 if (draggable->point_type == POINT_LG_BEGIN || draggable->point_type == POINT_LG_END) {
667 for (GList *di = dragger->parent->draggers; di != NULL; di = di->next) {
668 GrDragger *d_new = (GrDragger *) di->data;
669 if (d_new == dragger)
670 continue;
671 if (d_new->isA (draggable->item,
672 draggable->point_type == POINT_LG_BEGIN? POINT_LG_END : POINT_LG_BEGIN,
673 draggable->fill_or_stroke)) {
674 // found the other end of the linear gradient;
675 if (state & GDK_SHIFT_MASK) {
676 // moving linear around center
677 Geom::Point center = Geom::Point (0.5*(d_new->point + dragger->point));
678 dr_snap = center;
679 } else {
680 // moving linear around the other end
681 dr_snap = d_new->point;
682 }
683 }
684 }
685 } else if (draggable->point_type == POINT_RG_R1 || draggable->point_type == POINT_RG_R2 || draggable->point_type == POINT_RG_FOCUS) {
686 for (GList *di = dragger->parent->draggers; di != NULL; di = di->next) {
687 GrDragger *d_new = (GrDragger *) di->data;
688 if (d_new == dragger)
689 continue;
690 if (d_new->isA (draggable->item,
691 POINT_RG_CENTER,
692 draggable->fill_or_stroke)) {
693 // found the center of the radial gradient;
694 dr_snap = d_new->point;
695 }
696 }
697 } else if (draggable->point_type == POINT_RG_CENTER) {
698 // radial center snaps to hor/vert relative to its original position
699 dr_snap = dragger->point_original;
700 }
702 boost::optional<Geom::Point> snap_vector;
703 if (dr_snap.isFinite()) {
704 if (state & GDK_MOD1_MASK) {
705 // with Alt, snap to the original angle and its perpendiculars
706 snap_vector = get_snap_vector (p, dr_snap, M_PI/2, Geom::atan2 (dragger->point_original - dr_snap));
707 } else {
708 // with Ctrl, snap to M_PI/snaps
709 snap_vector = get_snap_vector (p, dr_snap, M_PI/snaps, 0);
710 }
711 if (snap_vector) {
712 Inkscape::Snapper::SnapConstraint cl(dr_snap, p + *snap_vector - dr_snap);
713 Inkscape::SnappedPoint s = m.constrainedSnap(Inkscape::SnapCandidatePoint(p + *snap_vector, Inkscape::SNAPSOURCE_OTHER_HANDLE), cl);
714 if (s.getSnapped()) {
715 s.setTransformation(s.getPoint() - p);
716 sc.points.push_back(s);
717 } else {
718 Inkscape::SnappedPoint dummy(p + *snap_vector, Inkscape::SNAPSOURCE_OTHER_HANDLE, 0, Inkscape::SNAPTARGET_CONSTRAINED_ANGLE, Geom::L2(*snap_vector), 10000, true, true, false);
719 dummy.setTransformation(*snap_vector);
720 sc.points.push_back(dummy);
721 }
722 }
723 }
724 }
726 Inkscape::SnappedPoint bsp = m.findBestSnap(Inkscape::SnapCandidatePoint(p, Inkscape::SNAPSOURCE_OTHER_HANDLE), sc, true); // snap indicator will be displayed if needed
728 if (bsp.getSnapped()) {
729 p += bsp.getTransformation();
730 sp_knot_moveto (knot, p);
731 }
732 }
734 m.unSetup();
736 drag->keep_selection = (bool) g_list_find(drag->selected, dragger);
737 bool scale_radial = (state & GDK_CONTROL_MASK) && (state & GDK_SHIFT_MASK);
739 if (drag->keep_selection) {
740 Geom::Point diff = p - dragger->point;
741 drag->selected_move_nowrite (diff[Geom::X], diff[Geom::Y], scale_radial);
742 } else {
743 dragger->point = p;
744 dragger->fireDraggables (false, scale_radial);
745 dragger->updateDependencies(false);
746 }
748 }
751 static void
752 gr_midpoint_limits(GrDragger *dragger, SPObject *server, Geom::Point *begin, Geom::Point *end, Geom::Point *low_lim, Geom::Point *high_lim, GSList **moving)
753 {
755 GrDrag *drag = dragger->parent;
756 // a midpoint dragger can (logically) only contain one GrDraggable
757 GrDraggable *draggable = (GrDraggable *) dragger->draggables->data;
759 // get begin and end points between which dragging is allowed:
760 // the draglimits are between knot(lowest_i - 1) and knot(highest_i + 1)
761 *moving = g_slist_append(*moving, dragger);
763 guint lowest_i = draggable->point_i;
764 guint highest_i = draggable->point_i;
765 GrDragger *lowest_dragger = dragger;
766 GrDragger *highest_dragger = dragger;
767 if (dragger->isSelected()) {
768 GrDragger* d_add;
769 while ( true )
770 {
771 d_add = drag->getDraggerFor(draggable->item, draggable->point_type, lowest_i - 1, draggable->fill_or_stroke);
772 if ( d_add && g_list_find(drag->selected, d_add) ) {
773 lowest_i = lowest_i - 1;
774 *moving = g_slist_prepend(*moving, d_add);
775 lowest_dragger = d_add;
776 } else {
777 break;
778 }
779 }
781 while ( true )
782 {
783 d_add = drag->getDraggerFor(draggable->item, draggable->point_type, highest_i + 1, draggable->fill_or_stroke);
784 if ( d_add && g_list_find(drag->selected, d_add) ) {
785 highest_i = highest_i + 1;
786 *moving = g_slist_append(*moving, d_add);
787 highest_dragger = d_add;
788 } else {
789 break;
790 }
791 }
792 }
794 if ( SP_IS_LINEARGRADIENT(server) ) {
795 guint num = SP_LINEARGRADIENT(server)->vector.stops.size();
796 GrDragger *d_temp;
797 if (lowest_i == 1) {
798 d_temp = drag->getDraggerFor (draggable->item, POINT_LG_BEGIN, 0, draggable->fill_or_stroke);
799 } else {
800 d_temp = drag->getDraggerFor (draggable->item, POINT_LG_MID, lowest_i - 1, draggable->fill_or_stroke);
801 }
802 if (d_temp)
803 *begin = d_temp->point;
805 d_temp = drag->getDraggerFor (draggable->item, POINT_LG_MID, highest_i + 1, draggable->fill_or_stroke);
806 if (d_temp == NULL) {
807 d_temp = drag->getDraggerFor (draggable->item, POINT_LG_END, num-1, draggable->fill_or_stroke);
808 }
809 if (d_temp)
810 *end = d_temp->point;
811 } else if ( SP_IS_RADIALGRADIENT(server) ) {
812 guint num = SP_RADIALGRADIENT(server)->vector.stops.size();
813 GrDragger *d_temp;
814 if (lowest_i == 1) {
815 d_temp = drag->getDraggerFor (draggable->item, POINT_RG_CENTER, 0, draggable->fill_or_stroke);
816 } else {
817 d_temp = drag->getDraggerFor (draggable->item, draggable->point_type, lowest_i - 1, draggable->fill_or_stroke);
818 }
819 if (d_temp)
820 *begin = d_temp->point;
822 d_temp = drag->getDraggerFor (draggable->item, draggable->point_type, highest_i + 1, draggable->fill_or_stroke);
823 if (d_temp == NULL) {
824 d_temp = drag->getDraggerFor (draggable->item, (draggable->point_type==POINT_RG_MID1) ? POINT_RG_R1 : POINT_RG_R2, num-1, draggable->fill_or_stroke);
825 }
826 if (d_temp)
827 *end = d_temp->point;
828 }
830 *low_lim = dragger->point - (lowest_dragger->point - *begin);
831 *high_lim = dragger->point - (highest_dragger->point - *end);
832 }
836 /**
837 Called when a midpoint knot is dragged.
838 */
839 static void
840 gr_knot_moved_midpoint_handler(SPKnot */*knot*/, Geom::Point const &ppointer, guint state, gpointer data)
841 {
842 GrDragger *dragger = (GrDragger *) data;
843 GrDrag *drag = dragger->parent;
844 // a midpoint dragger can (logically) only contain one GrDraggable
845 GrDraggable *draggable = (GrDraggable *) dragger->draggables->data;
847 // FIXME: take from prefs
848 double snap_fraction = 0.1;
850 Geom::Point p = ppointer;
851 Geom::Point begin(0,0), end(0,0);
852 Geom::Point low_lim(0,0), high_lim(0,0);
854 SPObject *server = draggable->getServer();
856 GSList *moving = NULL;
857 gr_midpoint_limits(dragger, server, &begin, &end, &low_lim, &high_lim, &moving);
859 if (state & GDK_CONTROL_MASK) {
860 p = snap_vector_midpoint (p, low_lim, high_lim, snap_fraction);
861 } else {
862 p = snap_vector_midpoint (p, low_lim, high_lim, 0);
863 if (!(state & GDK_SHIFT_MASK)) {
864 Inkscape::Snapper::SnapConstraint cl(low_lim, high_lim - low_lim);
865 SPDesktop *desktop = dragger->parent->desktop;
866 SnapManager &m = desktop->namedview->snap_manager;
867 m.setup(desktop);
868 m.constrainedSnapReturnByRef(p, Inkscape::SNAPSOURCE_OTHER_HANDLE, cl);
869 m.unSetup();
870 }
871 }
872 Geom::Point displacement = p - dragger->point;
874 for (GSList const* i = moving; i != NULL; i = i->next) {
875 GrDragger *drg = (GrDragger*) i->data;
876 SPKnot *drgknot = drg->knot;
877 Geom::Point this_move = displacement;
878 if (state & GDK_MOD1_MASK) {
879 // FIXME: unify all these profiles (here, in nodepath, in tweak) in one place
880 double alpha = 1.0;
881 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
882 double x = Geom::L2(drg->point - dragger->point)/Geom::L2(end - dragger->point);
883 this_move = (0.5 * cos (M_PI * (pow(x, alpha))) + 0.5) * this_move;
884 } else { // drg is on the begin side from dragger
885 double x = Geom::L2(drg->point - dragger->point)/Geom::L2(begin - dragger->point);
886 this_move = (0.5 * cos (M_PI * (pow(x, alpha))) + 0.5) * this_move;
887 }
888 }
889 drg->point += this_move;
890 sp_knot_moveto (drgknot, drg->point);
891 drg->fireDraggables (false);
892 drg->updateDependencies(false);
893 }
895 g_slist_free(moving);
897 drag->keep_selection = dragger->isSelected();
898 }
902 static void
903 gr_knot_grabbed_handler (SPKnot */*knot*/, unsigned int /*state*/, gpointer data)
904 {
905 GrDragger *dragger = (GrDragger *) data;
907 sp_canvas_force_full_redraw_after_interruptions(dragger->parent->desktop->canvas, 5);
908 }
910 /**
911 Called when the mouse releases a dragger knot; changes gradient writing to repr, updates other draggers if needed
912 */
913 static void
914 gr_knot_ungrabbed_handler (SPKnot *knot, unsigned int state, gpointer data)
915 {
916 GrDragger *dragger = (GrDragger *) data;
918 sp_canvas_end_forced_full_redraws(dragger->parent->desktop->canvas);
920 dragger->point_original = dragger->point = knot->pos;
922 if ((state & GDK_CONTROL_MASK) && (state & GDK_SHIFT_MASK)) {
923 dragger->fireDraggables (true, true);
924 } else {
925 dragger->fireDraggables (true);
926 }
928 for (GList *i = dragger->parent->selected; i != NULL; i = i->next) {
929 GrDragger *d = (GrDragger *) i->data;
930 if (d == dragger)
931 continue;
932 d->fireDraggables (true);
933 }
935 // make this dragger selected
936 if (!dragger->parent->keep_selection) {
937 dragger->parent->setSelected (dragger);
938 }
939 dragger->parent->keep_selection = false;
941 dragger->updateDependencies(true);
943 // we did an undoable action
944 sp_document_done (sp_desktop_document (dragger->parent->desktop), SP_VERB_CONTEXT_GRADIENT,
945 _("Move gradient handle"));
946 }
948 /**
949 Called when a dragger knot is clicked; selects the dragger or deletes it depending on the
950 state of the keyboard keys
951 */
952 static void
953 gr_knot_clicked_handler(SPKnot */*knot*/, guint state, gpointer data)
954 {
955 GrDragger *dragger = (GrDragger *) data;
956 GrDraggable *draggable = (GrDraggable *) dragger->draggables->data;
957 if (!draggable) return;
959 if ( (state & GDK_CONTROL_MASK) && (state & GDK_MOD1_MASK ) ) {
960 // delete this knot from vector
961 SPGradient *gradient = sp_item_gradient (draggable->item, draggable->fill_or_stroke);
962 gradient = gradient->getVector();
963 if (gradient->vector.stops.size() > 2) { // 2 is the minimum
964 SPStop *stop = NULL;
965 switch (draggable->point_type) { // if we delete first or last stop, move the next/previous to the edge
966 case POINT_LG_BEGIN:
967 case POINT_RG_CENTER:
968 stop = gradient->getFirstStop();
969 {
970 SPStop *next = stop->getNextStop();
971 if (next) {
972 next->offset = 0;
973 sp_repr_set_css_double (SP_OBJECT_REPR (next), "offset", 0);
974 }
975 }
976 break;
977 case POINT_LG_END:
978 case POINT_RG_R1:
979 case POINT_RG_R2:
980 stop = sp_last_stop(gradient);
981 {
982 SPStop *prev = stop->getPrevStop();
983 if (prev) {
984 prev->offset = 1;
985 sp_repr_set_css_double (SP_OBJECT_REPR (prev), "offset", 1);
986 }
987 }
988 break;
989 case POINT_LG_MID:
990 case POINT_RG_MID1:
991 case POINT_RG_MID2:
992 stop = sp_get_stop_i(gradient, draggable->point_i);
993 break;
994 }
996 SP_OBJECT_REPR(gradient)->removeChild(SP_OBJECT_REPR(stop));
997 sp_document_done (SP_OBJECT_DOCUMENT (gradient), SP_VERB_CONTEXT_GRADIENT,
998 _("Delete gradient stop"));
999 }
1000 } else {
1001 // select the dragger
1002 dragger->point_original = dragger->point;
1004 if ( state & GDK_SHIFT_MASK ) {
1005 dragger->parent->setSelected (dragger, true, false);
1006 } else {
1007 dragger->parent->setSelected (dragger);
1008 }
1009 }
1010 }
1012 /**
1013 Called when a dragger knot is doubleclicked; opens gradient editor with the stop from the first draggable
1014 */
1015 static void
1016 gr_knot_doubleclicked_handler (SPKnot */*knot*/, guint /*state*/, gpointer data)
1017 {
1018 GrDragger *dragger = (GrDragger *) data;
1020 dragger->point_original = dragger->point;
1022 if (dragger->draggables == NULL)
1023 return;
1025 GrDraggable *draggable = (GrDraggable *) dragger->draggables->data;
1026 sp_item_gradient_edit_stop (draggable->item, draggable->point_type, draggable->point_i, draggable->fill_or_stroke);
1027 }
1029 /**
1030 Act upon all draggables of the dragger, setting them to the dragger's point
1031 */
1032 void
1033 GrDragger::fireDraggables (bool write_repr, bool scale_radial, bool merging_focus)
1034 {
1035 for (GSList const* i = this->draggables; i != NULL; i = i->next) {
1036 GrDraggable *draggable = (GrDraggable *) i->data;
1038 // set local_change flag so that selection_changed callback does not regenerate draggers
1039 this->parent->local_change = true;
1041 // change gradient, optionally writing to repr; prevent focus from moving if it's snapped
1042 // to the center, unless it's the first update upon merge when we must snap it to the point
1043 if (merging_focus ||
1044 !(draggable->point_type == POINT_RG_FOCUS && this->isA(draggable->item, POINT_RG_CENTER, draggable->point_i, draggable->fill_or_stroke)))
1045 {
1046 sp_item_gradient_set_coords (draggable->item, draggable->point_type, draggable->point_i, this->point, draggable->fill_or_stroke, write_repr, scale_radial);
1047 }
1048 }
1049 }
1051 /**
1052 Checks if the dragger has a draggable with this point_type
1053 */
1054 bool
1055 GrDragger::isA (gint point_type)
1056 {
1057 for (GSList const* i = this->draggables; i != NULL; i = i->next) {
1058 GrDraggable *draggable = (GrDraggable *) i->data;
1059 if (draggable->point_type == point_type) {
1060 return true;
1061 }
1062 }
1063 return false;
1064 }
1066 /**
1067 Checks if the dragger has a draggable with this item, point_type + point_i (number), fill_or_stroke
1068 */
1069 bool
1070 GrDragger::isA (SPItem *item, gint point_type, gint point_i, bool fill_or_stroke)
1071 {
1072 for (GSList const* i = this->draggables; i != NULL; i = i->next) {
1073 GrDraggable *draggable = (GrDraggable *) i->data;
1074 if ( (draggable->point_type == point_type) && (draggable->point_i == point_i) && (draggable->item == item) && (draggable->fill_or_stroke == fill_or_stroke) ) {
1075 return true;
1076 }
1077 }
1078 return false;
1079 }
1081 /**
1082 Checks if the dragger has a draggable with this item, point_type, fill_or_stroke
1083 */
1084 bool
1085 GrDragger::isA (SPItem *item, gint point_type, bool fill_or_stroke)
1086 {
1087 for (GSList const* i = this->draggables; i != NULL; i = i->next) {
1088 GrDraggable *draggable = (GrDraggable *) i->data;
1089 if ( (draggable->point_type == point_type) && (draggable->item == item) && (draggable->fill_or_stroke == fill_or_stroke) ) {
1090 return true;
1091 }
1092 }
1093 return false;
1094 }
1096 bool
1097 GrDraggable::mayMerge (GrDraggable *da2)
1098 {
1099 if ((this->item == da2->item) && (this->fill_or_stroke == da2->fill_or_stroke)) {
1100 // we must not merge the points of the same gradient!
1101 if (!((this->point_type == POINT_RG_FOCUS && da2->point_type == POINT_RG_CENTER) ||
1102 (this->point_type == POINT_RG_CENTER && da2->point_type == POINT_RG_FOCUS))) {
1103 // except that we can snap center and focus together
1104 return false;
1105 }
1106 }
1107 // disable merging of midpoints.
1108 if ( (this->point_type == POINT_LG_MID) || (da2->point_type == POINT_LG_MID)
1109 || (this->point_type == POINT_RG_MID1) || (da2->point_type == POINT_RG_MID1)
1110 || (this->point_type == POINT_RG_MID2) || (da2->point_type == POINT_RG_MID2) )
1111 return false;
1113 return true;
1114 }
1116 bool
1117 GrDragger::mayMerge (GrDragger *other)
1118 {
1119 if (this == other)
1120 return false;
1122 for (GSList const* i = this->draggables; i != NULL; i = i->next) { // for all draggables of this
1123 GrDraggable *da1 = (GrDraggable *) i->data;
1124 for (GSList const* j = other->draggables; j != NULL; j = j->next) { // for all draggables of other
1125 GrDraggable *da2 = (GrDraggable *) j->data;
1126 if (!da1->mayMerge(da2))
1127 return false;
1128 }
1129 }
1130 return true;
1131 }
1133 bool
1134 GrDragger::mayMerge (GrDraggable *da2)
1135 {
1136 for (GSList const* i = this->draggables; i != NULL; i = i->next) { // for all draggables of this
1137 GrDraggable *da1 = (GrDraggable *) i->data;
1138 if (!da1->mayMerge(da2))
1139 return false;
1140 }
1141 return true;
1142 }
1144 /**
1145 Updates the statusbar tip of the dragger knot, based on its draggables
1146 */
1147 void
1148 GrDragger::updateTip ()
1149 {
1150 if (this->knot && this->knot->tip) {
1151 g_free (this->knot->tip);
1152 this->knot->tip = NULL;
1153 }
1155 if (g_slist_length (this->draggables) == 1) {
1156 GrDraggable *draggable = (GrDraggable *) this->draggables->data;
1157 char *item_desc = sp_item_description(draggable->item);
1158 switch (draggable->point_type) {
1159 case POINT_LG_MID:
1160 case POINT_RG_MID1:
1161 case POINT_RG_MID2:
1162 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"),
1163 _(gr_knot_descr[draggable->point_type]),
1164 draggable->point_i,
1165 item_desc,
1166 draggable->fill_or_stroke == false ? _(" (stroke)") : "");
1167 break;
1169 default:
1170 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"),
1171 _(gr_knot_descr[draggable->point_type]),
1172 item_desc,
1173 draggable->fill_or_stroke == false ? _(" (stroke)") : "");
1174 break;
1175 }
1176 g_free(item_desc);
1177 } else if (g_slist_length (draggables) == 2 && isA (POINT_RG_CENTER) && isA (POINT_RG_FOCUS)) {
1178 this->knot->tip = g_strdup_printf (_("Radial gradient <b>center</b> and <b>focus</b>; drag with <b>Shift</b> to separate focus"));
1179 } else {
1180 int length = g_slist_length (this->draggables);
1181 this->knot->tip = g_strdup_printf (ngettext("Gradient point shared by <b>%d</b> gradient; drag with <b>Shift</b> to separate",
1182 "Gradient point shared by <b>%d</b> gradients; drag with <b>Shift</b> to separate",
1183 length),
1184 length);
1185 }
1186 }
1188 /**
1189 Adds a draggable to the dragger
1190 */
1191 void
1192 GrDragger::updateKnotShape ()
1193 {
1194 if (!draggables)
1195 return;
1196 GrDraggable *last = (GrDraggable *) g_slist_last(draggables)->data;
1197 g_object_set (G_OBJECT (this->knot->item), "shape", gr_knot_shapes[last->point_type], NULL);
1198 }
1200 /**
1201 Adds a draggable to the dragger
1202 */
1203 void
1204 GrDragger::addDraggable (GrDraggable *draggable)
1205 {
1206 this->draggables = g_slist_prepend (this->draggables, draggable);
1208 this->updateTip();
1209 }
1212 /**
1213 Moves this dragger to the point of the given draggable, acting upon all other draggables
1214 */
1215 void
1216 GrDragger::moveThisToDraggable (SPItem *item, gint point_type, gint point_i, bool fill_or_stroke, bool write_repr)
1217 {
1218 GrDraggable *dr_first = (GrDraggable *) this->draggables->data;
1219 if (!dr_first) return;
1221 this->point = sp_item_gradient_get_coords (dr_first->item, dr_first->point_type, dr_first->point_i, dr_first->fill_or_stroke);
1222 this->point_original = this->point;
1224 sp_knot_moveto (this->knot, this->point);
1226 for (GSList const* i = this->draggables; i != NULL; i = i->next) {
1227 GrDraggable *da = (GrDraggable *) i->data;
1228 if ( (da->item == item) &&
1229 (point_type == -1 || da->point_type == point_type) &&
1230 (point_i == -1 || da->point_i == point_i) &&
1231 (da->fill_or_stroke == fill_or_stroke) ) {
1232 continue;
1233 }
1234 sp_item_gradient_set_coords (da->item, da->point_type, da->point_i, this->point, da->fill_or_stroke, write_repr, false);
1235 }
1236 // FIXME: here we should also call this->updateDependencies(write_repr); to propagate updating, but how to prevent loops?
1237 }
1240 /**
1241 Moves all midstop draggables that depend on this one
1242 */
1243 void
1244 GrDragger::updateMidstopDependencies (GrDraggable *draggable, bool write_repr) {
1245 SPObject *server = draggable->getServer();
1246 if (!server)
1247 return;
1248 guint num = SP_GRADIENT(server)->vector.stops.size();
1249 if (num <= 2) return;
1251 if ( SP_IS_LINEARGRADIENT(server) ) {
1252 for ( guint i = 1; i < num - 1; i++ ) {
1253 this->moveOtherToDraggable (draggable->item, POINT_LG_MID, i, draggable->fill_or_stroke, write_repr);
1254 }
1255 } else if ( SP_IS_RADIALGRADIENT(server) ) {
1256 for ( guint i = 1; i < num - 1; i++ ) {
1257 this->moveOtherToDraggable (draggable->item, POINT_RG_MID1, i, draggable->fill_or_stroke, write_repr);
1258 this->moveOtherToDraggable (draggable->item, POINT_RG_MID2, i, draggable->fill_or_stroke, write_repr);
1259 }
1260 }
1261 }
1264 /**
1265 Moves all draggables that depend on this one
1266 */
1267 void
1268 GrDragger::updateDependencies (bool write_repr)
1269 {
1270 for (GSList const* i = this->draggables; i != NULL; i = i->next) {
1271 GrDraggable *draggable = (GrDraggable *) i->data;
1272 switch (draggable->point_type) {
1273 case POINT_LG_BEGIN:
1274 {
1275 // the end point is dependent only when dragging with ctrl+shift
1276 this->moveOtherToDraggable (draggable->item, POINT_LG_END, -1, draggable->fill_or_stroke, write_repr);
1278 this->updateMidstopDependencies (draggable, write_repr);
1279 }
1280 break;
1281 case POINT_LG_END:
1282 {
1283 // the begin point is dependent only when dragging with ctrl+shift
1284 this->moveOtherToDraggable (draggable->item, POINT_LG_BEGIN, 0, draggable->fill_or_stroke, write_repr);
1286 this->updateMidstopDependencies (draggable, write_repr);
1287 }
1288 break;
1289 case POINT_LG_MID:
1290 // no other nodes depend on mid points.
1291 break;
1292 case POINT_RG_R2:
1293 this->moveOtherToDraggable (draggable->item, POINT_RG_R1, -1, draggable->fill_or_stroke, write_repr);
1294 this->moveOtherToDraggable (draggable->item, POINT_RG_FOCUS, -1, draggable->fill_or_stroke, write_repr);
1295 this->updateMidstopDependencies (draggable, write_repr);
1296 break;
1297 case POINT_RG_R1:
1298 this->moveOtherToDraggable (draggable->item, POINT_RG_R2, -1, draggable->fill_or_stroke, write_repr);
1299 this->moveOtherToDraggable (draggable->item, POINT_RG_FOCUS, -1, draggable->fill_or_stroke, write_repr);
1300 this->updateMidstopDependencies (draggable, write_repr);
1301 break;
1302 case POINT_RG_CENTER:
1303 this->moveOtherToDraggable (draggable->item, POINT_RG_R1, -1, draggable->fill_or_stroke, write_repr);
1304 this->moveOtherToDraggable (draggable->item, POINT_RG_R2, -1, draggable->fill_or_stroke, write_repr);
1305 this->moveOtherToDraggable (draggable->item, POINT_RG_FOCUS, -1, draggable->fill_or_stroke, write_repr);
1306 this->updateMidstopDependencies (draggable, write_repr);
1307 break;
1308 case POINT_RG_FOCUS:
1309 // nothing can depend on that
1310 break;
1311 case POINT_RG_MID1:
1312 this->moveOtherToDraggable (draggable->item, POINT_RG_MID2, draggable->point_i, draggable->fill_or_stroke, write_repr);
1313 break;
1314 case POINT_RG_MID2:
1315 this->moveOtherToDraggable (draggable->item, POINT_RG_MID1, draggable->point_i, draggable->fill_or_stroke, write_repr);
1316 break;
1317 default:
1318 break;
1319 }
1320 }
1321 }
1325 GrDragger::GrDragger (GrDrag *parent, Geom::Point p, GrDraggable *draggable)
1326 : point(p),
1327 point_original(p)
1328 {
1329 this->draggables = NULL;
1331 this->parent = parent;
1333 // create the knot
1334 this->knot = sp_knot_new (parent->desktop, NULL);
1335 this->knot->setMode(SP_KNOT_MODE_XOR);
1336 this->knot->setFill(GR_KNOT_COLOR_NORMAL, GR_KNOT_COLOR_MOUSEOVER, GR_KNOT_COLOR_MOUSEOVER);
1337 this->knot->setStroke(0x0000007f, 0x0000007f, 0x0000007f);
1338 sp_knot_update_ctrl(this->knot);
1340 // move knot to the given point
1341 sp_knot_set_position (this->knot, p, SP_KNOT_STATE_NORMAL);
1342 sp_knot_show (this->knot);
1344 // connect knot's signals
1345 if ( (draggable) // it can be NULL if a node in unsnapped (eg. focus point unsnapped from center)
1346 // luckily, midstops never snap to other nodes so are never unsnapped...
1347 && ( (draggable->point_type == POINT_LG_MID)
1348 || (draggable->point_type == POINT_RG_MID1)
1349 || (draggable->point_type == POINT_RG_MID2) ) )
1350 {
1351 this->handler_id = g_signal_connect (G_OBJECT (this->knot), "moved", G_CALLBACK (gr_knot_moved_midpoint_handler), this);
1352 } else {
1353 this->handler_id = g_signal_connect (G_OBJECT (this->knot), "moved", G_CALLBACK (gr_knot_moved_handler), this);
1354 }
1355 g_signal_connect (G_OBJECT (this->knot), "clicked", G_CALLBACK (gr_knot_clicked_handler), this);
1356 g_signal_connect (G_OBJECT (this->knot), "doubleclicked", G_CALLBACK (gr_knot_doubleclicked_handler), this);
1357 g_signal_connect (G_OBJECT (this->knot), "grabbed", G_CALLBACK (gr_knot_grabbed_handler), this);
1358 g_signal_connect (G_OBJECT (this->knot), "ungrabbed", G_CALLBACK (gr_knot_ungrabbed_handler), this);
1360 // add the initial draggable
1361 if (draggable)
1362 this->addDraggable (draggable);
1363 updateKnotShape();
1364 }
1366 GrDragger::~GrDragger ()
1367 {
1368 // unselect if it was selected
1369 this->parent->setDeselected(this);
1371 // disconnect signals
1372 g_signal_handlers_disconnect_by_func(G_OBJECT(this->knot), (gpointer) G_CALLBACK (gr_knot_moved_handler), this);
1373 g_signal_handlers_disconnect_by_func(G_OBJECT(this->knot), (gpointer) G_CALLBACK (gr_knot_clicked_handler), this);
1374 g_signal_handlers_disconnect_by_func(G_OBJECT(this->knot), (gpointer) G_CALLBACK (gr_knot_doubleclicked_handler), this);
1375 g_signal_handlers_disconnect_by_func(G_OBJECT(this->knot), (gpointer) G_CALLBACK (gr_knot_grabbed_handler), this);
1376 g_signal_handlers_disconnect_by_func(G_OBJECT(this->knot), (gpointer) G_CALLBACK (gr_knot_ungrabbed_handler), this);
1378 /* unref should call destroy */
1379 g_object_unref (G_OBJECT (this->knot));
1381 // delete all draggables
1382 for (GSList const* i = this->draggables; i != NULL; i = i->next) {
1383 delete ((GrDraggable *) i->data);
1384 }
1385 g_slist_free (this->draggables);
1386 this->draggables = NULL;
1387 }
1389 /**
1390 Select the dragger which has the given draggable.
1391 */
1392 GrDragger *
1393 GrDrag::getDraggerFor (SPItem *item, gint point_type, gint point_i, bool fill_or_stroke)
1394 {
1395 for (GList const* i = this->draggers; i != NULL; i = i->next) {
1396 GrDragger *dragger = (GrDragger *) i->data;
1397 for (GSList const* j = dragger->draggables; j != NULL; j = j->next) {
1398 GrDraggable *da2 = (GrDraggable *) j->data;
1399 if ( (da2->item == item) &&
1400 (point_type == -1 || da2->point_type == point_type) && // -1 means this does not matter
1401 (point_i == -1 || da2->point_i == point_i) && // -1 means this does not matter
1402 (da2->fill_or_stroke == fill_or_stroke)) {
1403 return (dragger);
1404 }
1405 }
1406 }
1407 return NULL;
1408 }
1411 void
1412 GrDragger::moveOtherToDraggable (SPItem *item, gint point_type, gint point_i, bool fill_or_stroke, bool write_repr)
1413 {
1414 GrDragger *d = this->parent->getDraggerFor (item, point_type, point_i, fill_or_stroke);
1415 if (d && d != this) {
1416 d->moveThisToDraggable (item, point_type, point_i, fill_or_stroke, write_repr);
1417 }
1418 }
1421 /**
1422 Draw this dragger as selected
1423 */
1424 void
1425 GrDragger::select()
1426 {
1427 this->knot->fill [SP_KNOT_STATE_NORMAL] = GR_KNOT_COLOR_SELECTED;
1428 g_object_set (G_OBJECT (this->knot->item), "fill_color", GR_KNOT_COLOR_SELECTED, NULL);
1429 }
1431 /**
1432 Draw this dragger as normal (deselected)
1433 */
1434 void
1435 GrDragger::deselect()
1436 {
1437 this->knot->fill [SP_KNOT_STATE_NORMAL] = GR_KNOT_COLOR_NORMAL;
1438 g_object_set (G_OBJECT (this->knot->item), "fill_color", GR_KNOT_COLOR_NORMAL, NULL);
1439 }
1441 bool
1442 GrDragger::isSelected()
1443 {
1444 return g_list_find (parent->selected, this);
1445 }
1447 /**
1448 \brief Deselect all stops/draggers (private)
1449 */
1450 void
1451 GrDrag::deselect_all()
1452 {
1453 while (selected) {
1454 ( (GrDragger*) selected->data)->deselect();
1455 selected = g_list_remove(selected, selected->data);
1456 }
1457 }
1459 /**
1460 \brief Deselect all stops/draggers (public; emits signal)
1461 */
1462 void
1463 GrDrag::deselectAll()
1464 {
1465 deselect_all();
1466 this->desktop->emitToolSubselectionChanged(NULL);
1467 }
1469 /**
1470 \brief Select all stops/draggers
1471 */
1472 void
1473 GrDrag::selectAll()
1474 {
1475 for (GList *l = this->draggers; l != NULL; l = l->next) {
1476 GrDragger *d = ((GrDragger *) l->data);
1477 setSelected (d, true, true);
1478 }
1479 }
1481 /**
1482 \brief Select all stops/draggers that match the coords
1483 */
1484 void
1485 GrDrag::selectByCoords(std::vector<Geom::Point> coords)
1486 {
1487 for (GList *l = this->draggers; l != NULL; l = l->next) {
1488 GrDragger *d = ((GrDragger *) l->data);
1489 for (guint k = 0; k < coords.size(); k++) {
1490 if (Geom::L2 (d->point - coords[k]) < 1e-4) {
1491 setSelected (d, true, true);
1492 }
1493 }
1494 }
1495 }
1498 /**
1499 \brief Select all stops/draggers that fall within the rect
1500 */
1501 void
1502 GrDrag::selectRect(Geom::Rect const &r)
1503 {
1504 for (GList *l = this->draggers; l != NULL; l = l->next) {
1505 GrDragger *d = ((GrDragger *) l->data);
1506 if (r.contains(d->point)) {
1507 setSelected (d, true, true);
1508 }
1509 }
1510 }
1512 /**
1513 \brief Select a dragger
1514 \param dragger The dragger to select
1515 \param add_to_selection If true, add to selection, otherwise deselect others
1516 \param override If true, always select this node, otherwise toggle selected status
1517 */
1518 void
1519 GrDrag::setSelected (GrDragger *dragger, bool add_to_selection, bool override)
1520 {
1521 GrDragger *seldragger = NULL;
1523 if (add_to_selection) {
1524 if (!dragger) return;
1525 if (override) {
1526 if (!g_list_find(selected, dragger)) {
1527 selected = g_list_prepend(selected, dragger);
1528 }
1529 dragger->select();
1530 seldragger = dragger;
1531 } else { // toggle
1532 if (g_list_find(selected, dragger)) {
1533 selected = g_list_remove(selected, dragger);
1534 dragger->deselect();
1535 if (selected) {
1536 seldragger = (GrDragger*) selected->data; // select the dragger that is first in the list
1537 }
1538 } else {
1539 selected = g_list_prepend(selected, dragger);
1540 dragger->select();
1541 seldragger = dragger;
1542 }
1543 }
1544 } else {
1545 deselect_all();
1546 if (dragger) {
1547 selected = g_list_prepend(selected, dragger);
1548 dragger->select();
1549 seldragger = dragger;
1550 }
1551 }
1552 if (seldragger) {
1553 this->desktop->emitToolSubselectionChanged((gpointer) seldragger);
1554 }
1555 }
1557 /**
1558 \brief Deselect a dragger
1559 \param dragger The dragger to deselect
1560 */
1561 void
1562 GrDrag::setDeselected (GrDragger *dragger)
1563 {
1564 if (g_list_find(selected, dragger)) {
1565 selected = g_list_remove(selected, dragger);
1566 dragger->deselect();
1567 }
1568 this->desktop->emitToolSubselectionChanged((gpointer) (selected ? selected->data : NULL ));
1569 }
1573 /**
1574 Create a line from p1 to p2 and add it to the lines list
1575 */
1576 void
1577 GrDrag::addLine (SPItem *item, Geom::Point p1, Geom::Point p2, guint32 rgba)
1578 {
1579 SPCanvasItem *line = sp_canvas_item_new(sp_desktop_controls(this->desktop),
1580 SP_TYPE_CTRLLINE, NULL);
1581 sp_canvas_item_move_to_z(line, 0);
1582 SP_CTRLLINE(line)->item = item;
1583 sp_ctrlline_set_coords(SP_CTRLLINE(line), p1, p2);
1584 if (rgba != GR_LINE_COLOR_FILL) // fill is the default, so don't set color for it to speed up redraw
1585 sp_ctrlline_set_rgba32 (SP_CTRLLINE(line), rgba);
1586 sp_canvas_item_show (line);
1587 this->lines = g_slist_append (this->lines, line);
1588 }
1590 /**
1591 If there already exists a dragger within MERGE_DIST of p, add the draggable to it; otherwise create
1592 new dragger and add it to draggers list
1593 */
1594 void
1595 GrDrag::addDragger (GrDraggable *draggable)
1596 {
1597 Geom::Point p = sp_item_gradient_get_coords (draggable->item, draggable->point_type, draggable->point_i, draggable->fill_or_stroke);
1599 for (GList *i = this->draggers; i != NULL; i = i->next) {
1600 GrDragger *dragger = (GrDragger *) i->data;
1601 if (dragger->mayMerge (draggable) && Geom::L2 (dragger->point - p) < MERGE_DIST) {
1602 // distance is small, merge this draggable into dragger, no need to create new dragger
1603 dragger->addDraggable (draggable);
1604 dragger->updateKnotShape();
1605 return;
1606 }
1607 }
1609 GrDragger *new_dragger = new GrDragger(this, p, draggable);
1610 // fixme: draggers should be added AFTER the last one: this way tabbing through them will be from begin to end.
1611 this->draggers = g_list_append (this->draggers, new_dragger);
1612 }
1614 /**
1615 Add draggers for the radial gradient rg on item
1616 */
1617 void
1618 GrDrag::addDraggersRadial (SPRadialGradient *rg, SPItem *item, bool fill_or_stroke)
1619 {
1620 addDragger (new GrDraggable (item, POINT_RG_CENTER, 0, fill_or_stroke));
1621 guint num = rg->vector.stops.size();
1622 if (num > 2) {
1623 for ( guint i = 1; i < num - 1; i++ ) {
1624 addDragger (new GrDraggable (item, POINT_RG_MID1, i, fill_or_stroke));
1625 }
1626 }
1627 addDragger (new GrDraggable (item, POINT_RG_R1, num-1, fill_or_stroke));
1628 if (num > 2) {
1629 for ( guint i = 1; i < num - 1; i++ ) {
1630 addDragger (new GrDraggable (item, POINT_RG_MID2, i, fill_or_stroke));
1631 }
1632 }
1633 addDragger (new GrDraggable (item, POINT_RG_R2, num-1, fill_or_stroke));
1634 addDragger (new GrDraggable (item, POINT_RG_FOCUS, 0, fill_or_stroke));
1635 }
1637 /**
1638 Add draggers for the linear gradient lg on item
1639 */
1640 void
1641 GrDrag::addDraggersLinear (SPLinearGradient *lg, SPItem *item, bool fill_or_stroke)
1642 {
1643 addDragger (new GrDraggable (item, POINT_LG_BEGIN, 0, fill_or_stroke));
1644 guint num = lg->vector.stops.size();
1645 if (num > 2) {
1646 for ( guint i = 1; i < num - 1; i++ ) {
1647 addDragger (new GrDraggable (item, POINT_LG_MID, i, fill_or_stroke));
1648 }
1649 }
1650 addDragger (new GrDraggable (item, POINT_LG_END, num-1, fill_or_stroke));
1651 }
1653 /**
1654 Artificially grab the knot of this dragger; used by the gradient context
1655 */
1656 void
1657 GrDrag::grabKnot (GrDragger *dragger, gint x, gint y, guint32 etime)
1658 {
1659 if (dragger) {
1660 sp_knot_start_dragging (dragger->knot, dragger->point, x, y, etime);
1661 }
1662 }
1664 /**
1665 Artificially grab the knot of the dragger with this draggable; used by the gradient context
1666 */
1667 void
1668 GrDrag::grabKnot (SPItem *item, gint point_type, gint point_i, bool fill_or_stroke, gint x, gint y, guint32 etime)
1669 {
1670 GrDragger *dragger = getDraggerFor (item, point_type, point_i, fill_or_stroke);
1671 if (dragger) {
1672 sp_knot_start_dragging (dragger->knot, dragger->point, x, y, etime);
1673 }
1674 }
1676 /**
1677 Regenerates the draggers list from the current selection; is called when selection is changed or
1678 modified, also when a radial dragger needs to update positions of other draggers in the gradient
1679 */
1680 void GrDrag::updateDraggers ()
1681 {
1682 while (selected) {
1683 selected = g_list_remove(selected, selected->data);
1684 }
1685 // delete old draggers
1686 for (GList const* i = this->draggers; i != NULL; i = i->next) {
1687 delete static_cast<GrDragger *>(i->data);
1688 }
1689 g_list_free(this->draggers);
1690 this->draggers = NULL;
1692 g_return_if_fail(this->selection != NULL);
1694 for (GSList const* i = this->selection->itemList(); i != NULL; i = i->next) {
1695 SPItem *item = SP_ITEM(i->data);
1696 SPStyle *style = item->style;
1698 if (style && (style->fill.isPaintserver())) {
1699 SPPaintServer *server = style->getFillPaintServer();
1700 if ( server && server->isSolid() ) {
1701 // Suppress "gradientness" of solid paint
1702 } else if ( SP_IS_LINEARGRADIENT(server) ) {
1703 addDraggersLinear( SP_LINEARGRADIENT(server), item, true );
1704 } else if ( SP_IS_RADIALGRADIENT(server) ) {
1705 addDraggersRadial( SP_RADIALGRADIENT(server), item, true );
1706 }
1707 }
1709 if (style && (style->stroke.isPaintserver())) {
1710 SPPaintServer *server = style->getStrokePaintServer();
1711 if ( server && server->isSolid() ) {
1712 // Suppress "gradientness" of solid paint
1713 } else if ( SP_IS_LINEARGRADIENT(server) ) {
1714 addDraggersLinear( SP_LINEARGRADIENT(server), item, false );
1715 } else if ( SP_IS_RADIALGRADIENT(server) ) {
1716 addDraggersRadial( SP_RADIALGRADIENT(server), item, false );
1717 }
1718 }
1719 }
1720 }
1723 /**
1724 * \brief Returns true if at least one of the draggers' knots has the mouse hovering above it
1725 */
1727 bool
1728 GrDrag::mouseOver()
1729 {
1730 for (GList const* i = this->draggers; i != NULL; i = i->next) {
1731 GrDragger *d = (GrDragger *) i->data;
1732 if (d->knot && (d->knot->flags & SP_KNOT_MOUSEOVER)) {
1733 return true;
1734 }
1735 }
1736 return false;
1737 }
1738 /**
1739 Regenerates the lines list from the current selection; is called on each move of a dragger, so that
1740 lines are always in sync with the actual gradient
1741 */
1742 void
1743 GrDrag::updateLines ()
1744 {
1745 // delete old lines
1746 for (GSList const *i = this->lines; i != NULL; i = i->next) {
1747 gtk_object_destroy( GTK_OBJECT (i->data));
1748 }
1749 g_slist_free (this->lines);
1750 this->lines = NULL;
1752 g_return_if_fail (this->selection != NULL);
1754 for (GSList const* i = this->selection->itemList(); i != NULL; i = i->next) {
1756 SPItem *item = SP_ITEM(i->data);
1758 SPStyle *style = SP_OBJECT_STYLE (item);
1760 if (style && (style->fill.isPaintserver())) {
1761 SPPaintServer *server = item->style->getFillPaintServer();
1762 if ( server && server->isSolid() ) {
1763 // Suppress "gradientness" of solid paint
1764 } else if ( SP_IS_LINEARGRADIENT(server) ) {
1765 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);
1766 } else if ( SP_IS_RADIALGRADIENT(server) ) {
1767 Geom::Point center = sp_item_gradient_get_coords (item, POINT_RG_CENTER, 0, true);
1768 this->addLine (item, center, sp_item_gradient_get_coords (item, POINT_RG_R1, 0, true), GR_LINE_COLOR_FILL);
1769 this->addLine (item, center, sp_item_gradient_get_coords (item, POINT_RG_R2, 0, true), GR_LINE_COLOR_FILL);
1770 }
1771 }
1773 if (style && (style->stroke.isPaintserver())) {
1774 SPPaintServer *server = item->style->getStrokePaintServer();
1775 if ( server && server->isSolid() ) {
1776 // Suppress "gradientness" of solid paint
1777 } else if ( SP_IS_LINEARGRADIENT(server) ) {
1778 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);
1779 } else if ( SP_IS_RADIALGRADIENT(server) ) {
1780 Geom::Point center = sp_item_gradient_get_coords (item, POINT_RG_CENTER, 0, false);
1781 this->addLine (item, center, sp_item_gradient_get_coords (item, POINT_RG_R1, 0, false), GR_LINE_COLOR_STROKE);
1782 this->addLine (item, center, sp_item_gradient_get_coords (item, POINT_RG_R2, 0, false), GR_LINE_COLOR_STROKE);
1783 }
1784 }
1785 }
1786 }
1788 /**
1789 Regenerates the levels list from the current selection
1790 */
1791 void
1792 GrDrag::updateLevels ()
1793 {
1794 hor_levels.clear();
1795 vert_levels.clear();
1797 g_return_if_fail (this->selection != NULL);
1799 for (GSList const* i = this->selection->itemList(); i != NULL; i = i->next) {
1800 SPItem *item = SP_ITEM(i->data);
1801 Geom::OptRect rect = sp_item_bbox_desktop (item);
1802 if (rect) {
1803 // Remember the edges of the bbox and the center axis
1804 hor_levels.push_back(rect->min()[Geom::Y]);
1805 hor_levels.push_back(rect->max()[Geom::Y]);
1806 hor_levels.push_back(0.5 * (rect->min()[Geom::Y] + rect->max()[Geom::Y]));
1807 vert_levels.push_back(rect->min()[Geom::X]);
1808 vert_levels.push_back(rect->max()[Geom::X]);
1809 vert_levels.push_back(0.5 * (rect->min()[Geom::X] + rect->max()[Geom::X]));
1810 }
1811 }
1812 }
1814 void
1815 GrDrag::selected_reverse_vector ()
1816 {
1817 if (selected == NULL)
1818 return;
1820 for (GSList const* i = ( (GrDragger*) selected->data )->draggables; i != NULL; i = i->next) {
1821 GrDraggable *draggable = (GrDraggable *) i->data;
1823 sp_item_gradient_reverse_vector (draggable->item, draggable->fill_or_stroke);
1824 }
1825 }
1827 void
1828 GrDrag::selected_move_nowrite (double x, double y, bool scale_radial)
1829 {
1830 selected_move (x, y, false, scale_radial);
1831 }
1833 void
1834 GrDrag::selected_move (double x, double y, bool write_repr, bool scale_radial)
1835 {
1836 if (selected == NULL)
1837 return;
1839 bool did = false;
1841 for (GList *i = selected; i != NULL; i = i->next) {
1842 GrDragger *d = (GrDragger *) i->data;
1844 if (!d->isA(POINT_LG_MID) && !d->isA(POINT_RG_MID1) && !d->isA(POINT_RG_MID2)) {
1845 // if this is an endpoint,
1847 // Moving an rg center moves its focus and radii as well.
1848 // therefore, if this is a focus or radius and if selection
1849 // contains the center as well, do not move this one
1850 if (d->isA(POINT_RG_R1) || d->isA(POINT_RG_R2) ||
1851 (d->isA(POINT_RG_FOCUS) && !d->isA(POINT_RG_CENTER))) {
1852 bool skip_radius_with_center = false;
1853 for (GList *di = selected; di != NULL; di = di->next) {
1854 GrDragger *d_new = (GrDragger *) di->data;
1855 if (d_new->isA (((GrDraggable *) d->draggables->data)->item,
1856 POINT_RG_CENTER,
1857 0,
1858 ((GrDraggable *) d->draggables->data)->fill_or_stroke)) {
1859 // FIXME: here we take into account only the first draggable!
1860 skip_radius_with_center = true;
1861 }
1862 }
1863 if (skip_radius_with_center)
1864 continue;
1865 }
1867 did = true;
1868 d->point += Geom::Point (x, y);
1869 d->point_original = d->point;
1870 sp_knot_moveto (d->knot, d->point);
1872 d->fireDraggables (write_repr, scale_radial);
1874 d->updateDependencies(write_repr);
1875 }
1876 }
1878 if (write_repr && did) {
1879 // we did an undoable action
1880 sp_document_maybe_done (sp_desktop_document (desktop), "grmoveh", SP_VERB_CONTEXT_GRADIENT,
1881 _("Move gradient handle(s)"));
1882 return;
1883 }
1885 if (!did) { // none of the end draggers are selected, so let's try to move the mids
1887 GrDragger *dragger = (GrDragger *) selected->data;
1888 // a midpoint dragger can (logically) only contain one GrDraggable
1889 GrDraggable *draggable = (GrDraggable *) dragger->draggables->data;
1891 Geom::Point begin(0,0), end(0,0);
1892 Geom::Point low_lim(0,0), high_lim(0,0);
1894 SPObject *server = draggable->getServer();
1895 GSList *moving = NULL;
1896 gr_midpoint_limits(dragger, server, &begin, &end, &low_lim, &high_lim, &moving);
1898 Geom::Point p(x, y);
1899 p = snap_vector_midpoint (dragger->point + p, low_lim, high_lim, 0);
1900 Geom::Point displacement = p - dragger->point;
1902 for (GSList const* i = moving; i != NULL; i = i->next) {
1903 GrDragger *drg = (GrDragger*) i->data;
1904 SPKnot *drgknot = drg->knot;
1905 drg->point += displacement;
1906 sp_knot_moveto (drgknot, drg->point);
1907 drg->fireDraggables (true);
1908 drg->updateDependencies(true);
1909 did = true;
1910 }
1912 g_slist_free(moving);
1914 if (write_repr && did) {
1915 // we did an undoable action
1916 sp_document_maybe_done (sp_desktop_document (desktop), "grmovem", SP_VERB_CONTEXT_GRADIENT,
1917 _("Move gradient mid stop(s)"));
1918 }
1919 }
1920 }
1922 void
1923 GrDrag::selected_move_screen (double x, double y)
1924 {
1925 gdouble zoom = desktop->current_zoom();
1926 gdouble zx = x / zoom;
1927 gdouble zy = y / zoom;
1929 selected_move (zx, zy);
1930 }
1932 /**
1933 Select the knot next to the last selected one and deselect all other selected.
1934 */
1935 GrDragger *
1936 GrDrag::select_next ()
1937 {
1938 GrDragger *d = NULL;
1939 if (selected == NULL || g_list_find(draggers, selected->data)->next == NULL) {
1940 if (draggers)
1941 d = (GrDragger *) draggers->data;
1942 } else {
1943 d = (GrDragger *) g_list_find(draggers, selected->data)->next->data;
1944 }
1945 if (d)
1946 setSelected (d);
1947 return d;
1948 }
1950 /**
1951 Select the knot previous from the last selected one and deselect all other selected.
1952 */
1953 GrDragger *
1954 GrDrag::select_prev ()
1955 {
1956 GrDragger *d = NULL;
1957 if (selected == NULL || g_list_find(draggers, selected->data)->prev == NULL) {
1958 if (draggers)
1959 d = (GrDragger *) g_list_last (draggers)->data;
1960 } else {
1961 d = (GrDragger *) g_list_find(draggers, selected->data)->prev->data;
1962 }
1963 if (d)
1964 setSelected (d);
1965 return d;
1966 }
1969 // FIXME: i.m.o. an ugly function that I just made to work, but... aargh! (Johan)
1970 void
1971 GrDrag::deleteSelected (bool just_one)
1972 {
1973 if (!selected) return;
1975 SPDocument *document = false;
1977 struct StructStopInfo {
1978 SPStop * spstop;
1979 GrDraggable * draggable;
1980 SPGradient * gradient;
1981 SPGradient * vector;
1982 };
1984 GSList *midstoplist = NULL; // list of stops that must be deleted (will be deleted first)
1985 GSList *endstoplist = NULL; // list of stops that must be deleted
1986 while (selected) {
1987 GrDragger *dragger = (GrDragger*) selected->data;
1988 for (GSList * drgble = dragger->draggables; drgble != NULL; drgble = drgble->next) {
1989 GrDraggable *draggable = (GrDraggable*) drgble->data;
1990 SPGradient *gradient = sp_item_gradient (draggable->item, draggable->fill_or_stroke);
1991 SPGradient *vector = sp_gradient_get_forked_vector_if_necessary (gradient, false);
1993 switch (draggable->point_type) {
1994 case POINT_LG_MID:
1995 case POINT_RG_MID1:
1996 case POINT_RG_MID2:
1997 {
1998 SPStop *stop = sp_get_stop_i(vector, draggable->point_i);
1999 // check if already present in list. (e.g. when both RG_MID1 and RG_MID2 were selected)
2000 bool present = false;
2001 for (GSList const * l = midstoplist; l != NULL; l = l->next) {
2002 if ( (SPStop*)l->data == stop ) {
2003 present = true;
2004 break; // no need to search further.
2005 }
2006 }
2007 if (!present)
2008 midstoplist = g_slist_append(midstoplist, stop);
2009 }
2010 break;
2011 case POINT_LG_BEGIN:
2012 case POINT_LG_END:
2013 case POINT_RG_CENTER:
2014 case POINT_RG_R1:
2015 case POINT_RG_R2:
2016 {
2017 SPStop *stop = NULL;
2018 if ( (draggable->point_type == POINT_LG_BEGIN) || (draggable->point_type == POINT_RG_CENTER) ) {
2019 stop = vector->getFirstStop();
2020 } else {
2021 stop = sp_last_stop(vector);
2022 }
2023 if (stop) {
2024 StructStopInfo *stopinfo = new StructStopInfo;
2025 stopinfo->spstop = stop;
2026 stopinfo->draggable = draggable;
2027 stopinfo->gradient = gradient;
2028 stopinfo->vector = vector;
2029 // check if already present in list. (e.g. when both R1 and R2 were selected)
2030 bool present = false;
2031 for (GSList const * l = endstoplist; l != NULL; l = l->next) {
2032 if ( ((StructStopInfo*)l->data)->spstop == stopinfo->spstop ) {
2033 present = true;
2034 break; // no need to search further.
2035 }
2036 }
2037 if (!present)
2038 endstoplist = g_slist_append(endstoplist, stopinfo);
2039 }
2040 }
2041 break;
2042 default:
2043 break;
2044 }
2045 }
2046 selected = g_list_remove(selected, dragger);
2047 if ( just_one ) break; // iterate once if just_one is set.
2048 }
2049 while (midstoplist) {
2050 SPStop *stop = (SPStop*) midstoplist->data;
2051 document = SP_OBJECT_DOCUMENT (stop);
2052 Inkscape::XML::Node * parent = SP_OBJECT_REPR(stop)->parent();
2053 parent->removeChild(SP_OBJECT_REPR(stop));
2054 midstoplist = g_slist_remove(midstoplist, stop);
2055 }
2056 while (endstoplist) {
2057 StructStopInfo *stopinfo = (StructStopInfo*) endstoplist->data;
2058 document = SP_OBJECT_DOCUMENT (stopinfo->spstop);
2060 // 2 is the minimum, cannot delete more than that without deleting the whole vector
2061 // cannot use vector->vector.stops.size() because the vector might be invalidated by deletion of a midstop
2062 // manually count the children, don't know if there already exists a function for this...
2063 int len = 0;
2064 for ( SPObject *child = sp_object_first_child(stopinfo->vector) ;
2065 child != NULL ;
2066 child = SP_OBJECT_NEXT(child) )
2067 {
2068 if ( SP_IS_STOP(child) ) len ++;
2069 }
2070 if (len > 2)
2071 {
2072 switch (stopinfo->draggable->point_type) {
2073 case POINT_LG_BEGIN:
2074 {
2075 SP_OBJECT_REPR(stopinfo->vector)->removeChild(SP_OBJECT_REPR(stopinfo->spstop));
2077 SPLinearGradient *lg = SP_LINEARGRADIENT(stopinfo->gradient);
2078 Geom::Point oldbegin = Geom::Point (lg->x1.computed, lg->y1.computed);
2079 Geom::Point end = Geom::Point (lg->x2.computed, lg->y2.computed);
2080 SPStop *stop = stopinfo->vector->getFirstStop();
2081 gdouble offset = stop->offset;
2082 Geom::Point newbegin = oldbegin + offset * (end - oldbegin);
2083 lg->x1.computed = newbegin[Geom::X];
2084 lg->y1.computed = newbegin[Geom::Y];
2086 Inkscape::XML::Node *repr = SP_OBJECT_REPR(stopinfo->gradient);
2087 sp_repr_set_svg_double(repr, "x1", lg->x1.computed);
2088 sp_repr_set_svg_double(repr, "y1", lg->y1.computed);
2089 stop->offset = 0;
2090 sp_repr_set_css_double (SP_OBJECT_REPR (stop), "offset", 0);
2092 // iterate through midstops to set new offset values such that they won't move on canvas.
2093 SPStop *laststop = sp_last_stop(stopinfo->vector);
2094 stop = stop->getNextStop();
2095 while ( stop != laststop ) {
2096 stop->offset = (stop->offset - offset)/(1 - offset);
2097 sp_repr_set_css_double (SP_OBJECT_REPR (stop), "offset", stop->offset);
2098 stop = stop->getNextStop();
2099 }
2100 }
2101 break;
2102 case POINT_LG_END:
2103 {
2104 SP_OBJECT_REPR(stopinfo->vector)->removeChild(SP_OBJECT_REPR(stopinfo->spstop));
2106 SPLinearGradient *lg = SP_LINEARGRADIENT(stopinfo->gradient);
2107 Geom::Point begin = Geom::Point (lg->x1.computed, lg->y1.computed);
2108 Geom::Point oldend = Geom::Point (lg->x2.computed, lg->y2.computed);
2109 SPStop *laststop = sp_last_stop(stopinfo->vector);
2110 gdouble offset = laststop->offset;
2111 Geom::Point newend = begin + offset * (oldend - begin);
2112 lg->x2.computed = newend[Geom::X];
2113 lg->y2.computed = newend[Geom::Y];
2115 Inkscape::XML::Node *repr = SP_OBJECT_REPR(stopinfo->gradient);
2116 sp_repr_set_svg_double(repr, "x2", lg->x2.computed);
2117 sp_repr_set_svg_double(repr, "y2", lg->y2.computed);
2118 laststop->offset = 1;
2119 sp_repr_set_css_double (SP_OBJECT_REPR (laststop), "offset", 1);
2121 // iterate through midstops to set new offset values such that they won't move on canvas.
2122 SPStop *stop = stopinfo->vector->getFirstStop();
2123 stop = stop->getNextStop();
2124 while ( stop != laststop ) {
2125 stop->offset = stop->offset / offset;
2126 sp_repr_set_css_double (SP_OBJECT_REPR (stop), "offset", stop->offset);
2127 stop = stop->getNextStop();
2128 }
2129 }
2130 break;
2131 case POINT_RG_CENTER:
2132 {
2133 SPStop *newfirst = stopinfo->spstop->getNextStop();
2134 if (newfirst) {
2135 newfirst->offset = 0;
2136 sp_repr_set_css_double (SP_OBJECT_REPR (newfirst), "offset", 0);
2137 }
2138 SP_OBJECT_REPR(stopinfo->vector)->removeChild(SP_OBJECT_REPR(stopinfo->spstop));
2139 }
2140 break;
2141 case POINT_RG_R1:
2142 case POINT_RG_R2:
2143 SP_OBJECT_REPR(stopinfo->vector)->removeChild(SP_OBJECT_REPR(stopinfo->spstop));
2145 SPRadialGradient *rg = SP_RADIALGRADIENT(stopinfo->gradient);
2146 double oldradius = rg->r.computed;
2147 SPStop *laststop = sp_last_stop(stopinfo->vector);
2148 gdouble offset = laststop->offset;
2149 double newradius = offset * oldradius;
2150 rg->r.computed = newradius;
2152 Inkscape::XML::Node *repr = SP_OBJECT_REPR(rg);
2153 sp_repr_set_svg_double(repr, "r", rg->r.computed);
2154 laststop->offset = 1;
2155 sp_repr_set_css_double (SP_OBJECT_REPR (laststop), "offset", 1);
2157 // iterate through midstops to set new offset values such that they won't move on canvas.
2158 SPStop *stop = stopinfo->vector->getFirstStop();
2159 stop = stop->getNextStop();
2160 while ( stop != laststop ) {
2161 stop->offset = stop->offset / offset;
2162 sp_repr_set_css_double (SP_OBJECT_REPR (stop), "offset", stop->offset);
2163 stop = stop->getNextStop();
2164 }
2165 break;
2166 }
2167 }
2168 else
2169 { // delete the gradient from the object. set fill to unset FIXME: set to fill of unselected node?
2170 SPCSSAttr *css = sp_repr_css_attr_new ();
2172 // stopinfo->spstop is the selected stop
2173 Inkscape::XML::Node *unselectedrepr = SP_OBJECT_REPR(stopinfo->vector)->firstChild();
2174 if (unselectedrepr == SP_OBJECT_REPR(stopinfo->spstop) ) {
2175 unselectedrepr = unselectedrepr->next();
2176 }
2178 if (unselectedrepr == NULL) {
2179 if (stopinfo->draggable->fill_or_stroke) {
2180 sp_repr_css_unset_property (css, "fill");
2181 } else {
2182 sp_repr_css_unset_property (css, "stroke");
2183 }
2184 } else {
2185 SPCSSAttr *stopcss = sp_repr_css_attr(unselectedrepr, "style");
2186 if (stopinfo->draggable->fill_or_stroke) {
2187 sp_repr_css_set_property(css, "fill", sp_repr_css_property(stopcss, "stop-color", "inkscape:unset"));
2188 sp_repr_css_set_property(css, "fill-opacity", sp_repr_css_property(stopcss, "stop-opacity", "1"));
2189 } else {
2190 sp_repr_css_set_property(css, "stroke", sp_repr_css_property(stopcss, "stop-color", "inkscape:unset"));
2191 sp_repr_css_set_property(css, "stroke-opacity", sp_repr_css_property(stopcss, "stop-opacity", "1"));
2192 }
2193 sp_repr_css_attr_unref (stopcss);
2194 }
2196 sp_repr_css_change (SP_OBJECT_REPR (stopinfo->draggable->item), css, "style");
2197 sp_repr_css_attr_unref (css);
2198 }
2200 endstoplist = g_slist_remove(endstoplist, stopinfo);
2201 delete stopinfo;
2202 }
2204 if (document) {
2205 sp_document_done ( document, SP_VERB_CONTEXT_GRADIENT, _("Delete gradient stop(s)") );
2206 }
2207 }
2210 /*
2211 Local Variables:
2212 mode:c++
2213 c-file-style:"stroustrup"
2214 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
2215 indent-tabs-mode:nil
2216 fill-column:99
2217 End:
2218 */
2219 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4 :