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 * Abhishek Sharma
9 *
10 * Copyright (C) 2007 Johan Engelen
11 * Copyright (C) 2005,2010 Authors
12 *
13 * Released under GNU GPL, read the file 'COPYING' for more information
14 */
16 #ifdef HAVE_CONFIG_H
17 #include "config.h"
18 #endif
20 #include <glibmm/i18n.h>
21 #include <cstring>
22 #include <string>
24 #include "desktop-handles.h"
25 #include "selection.h"
26 #include "desktop.h"
27 #include "desktop-style.h"
28 #include "document.h"
29 #include "display/sp-ctrlline.h"
30 #include "display/sp-canvas-util.h"
31 #include "xml/repr.h"
32 #include "svg/css-ostringstream.h"
33 #include "svg/svg.h"
34 #include "libnr/nr-point-fns.h"
35 #include "preferences.h"
36 #include "sp-item.h"
37 #include "style.h"
38 #include "knot.h"
39 #include "sp-linear-gradient.h"
40 #include "sp-radial-gradient.h"
41 #include "gradient-chemistry.h"
42 #include "gradient-drag.h"
43 #include "sp-stop.h"
44 #include "snap.h"
45 #include "sp-namedview.h"
46 #include "selection-chemistry.h"
48 using Inkscape::DocumentUndo;
50 #define GR_KNOT_COLOR_NORMAL 0xffffff00
51 #define GR_KNOT_COLOR_MOUSEOVER 0xff000000
52 #define GR_KNOT_COLOR_SELECTED 0x0000ff00
54 #define GR_LINE_COLOR_FILL 0x0000ff7f
55 #define GR_LINE_COLOR_STROKE 0x9999007f
57 // screen pixels between knots when they snap:
58 #define SNAP_DIST 5
60 // absolute distance between gradient points for them to become a single dragger when the drag is created:
61 #define MERGE_DIST 0.1
63 // knot shapes corresponding to GrPointType enum
64 SPKnotShapeType gr_knot_shapes [] = {
65 SP_KNOT_SHAPE_SQUARE, //POINT_LG_BEGIN
66 SP_KNOT_SHAPE_CIRCLE, //POINT_LG_END
67 SP_KNOT_SHAPE_DIAMOND, //POINT_LG_MID
68 SP_KNOT_SHAPE_SQUARE, // POINT_RG_CENTER
69 SP_KNOT_SHAPE_CIRCLE, // POINT_RG_R1
70 SP_KNOT_SHAPE_CIRCLE, // POINT_RG_R2
71 SP_KNOT_SHAPE_CROSS, // POINT_RG_FOCUS
72 SP_KNOT_SHAPE_DIAMOND, //POINT_RG_MID1
73 SP_KNOT_SHAPE_DIAMOND //POINT_RG_MID2
74 };
76 const gchar *gr_knot_descr [] = {
77 N_("Linear gradient <b>start</b>"), //POINT_LG_BEGIN
78 N_("Linear gradient <b>end</b>"),
79 N_("Linear gradient <b>mid stop</b>"),
80 N_("Radial gradient <b>center</b>"),
81 N_("Radial gradient <b>radius</b>"),
82 N_("Radial gradient <b>radius</b>"),
83 N_("Radial gradient <b>focus</b>"), // POINT_RG_FOCUS
84 N_("Radial gradient <b>mid stop</b>"),
85 N_("Radial gradient <b>mid stop</b>")
86 };
88 static void
89 gr_drag_sel_changed(Inkscape::Selection */*selection*/, gpointer data)
90 {
91 GrDrag *drag = (GrDrag *) data;
92 drag->updateDraggers ();
93 drag->updateLines ();
94 drag->updateLevels ();
95 }
97 static void
98 gr_drag_sel_modified (Inkscape::Selection */*selection*/, guint /*flags*/, gpointer data)
99 {
100 GrDrag *drag = (GrDrag *) data;
101 if (drag->local_change) {
102 drag->local_change = false;
103 } else {
104 drag->updateDraggers ();
105 }
106 drag->updateLines ();
107 drag->updateLevels ();
108 }
110 /**
111 When a _query_style_signal is received, check that \a property requests fill/stroke/opacity (otherwise
112 skip), and fill the \a style with the averaged color of all draggables of the selected dragger, if
113 any.
114 */
115 int
116 gr_drag_style_query (SPStyle *style, int property, gpointer data)
117 {
118 GrDrag *drag = (GrDrag *) data;
120 if (property != QUERY_STYLE_PROPERTY_FILL && property != QUERY_STYLE_PROPERTY_STROKE && property != QUERY_STYLE_PROPERTY_MASTEROPACITY) {
121 return QUERY_STYLE_NOTHING;
122 }
124 if (!drag->selected) {
125 return QUERY_STYLE_NOTHING;
126 } else {
127 int ret = QUERY_STYLE_NOTHING;
129 float cf[4];
130 cf[0] = cf[1] = cf[2] = cf[3] = 0;
132 int count = 0;
134 for (GList *i = drag->selected; i != NULL; i = i->next) { // for all selected draggers
135 GrDragger *d = (GrDragger *) i->data;
136 for (GSList const* j = d->draggables; j != NULL; j = j->next) { // for all draggables of dragger
137 GrDraggable *draggable = (GrDraggable *) j->data;
139 if (ret == QUERY_STYLE_NOTHING) {
140 ret = QUERY_STYLE_SINGLE;
141 } else if (ret == QUERY_STYLE_SINGLE) {
142 ret = QUERY_STYLE_MULTIPLE_AVERAGED;
143 }
145 guint32 c = sp_item_gradient_stop_query_style (draggable->item, draggable->point_type, draggable->point_i, draggable->fill_or_stroke);
146 cf[0] += SP_RGBA32_R_F (c);
147 cf[1] += SP_RGBA32_G_F (c);
148 cf[2] += SP_RGBA32_B_F (c);
149 cf[3] += SP_RGBA32_A_F (c);
151 count ++;
152 }
153 }
155 if (count) {
156 cf[0] /= count;
157 cf[1] /= count;
158 cf[2] /= count;
159 cf[3] /= count;
161 // set both fill and stroke with our stop-color and stop-opacity
162 style->fill.clear();
163 style->fill.setColor( cf[0], cf[1], cf[2] );
164 style->fill.set = TRUE;
165 style->stroke.clear();
166 style->stroke.setColor( cf[0], cf[1], cf[2] );
167 style->stroke.set = TRUE;
169 style->fill_opacity.value = SP_SCALE24_FROM_FLOAT (1.0);
170 style->fill_opacity.set = TRUE;
171 style->stroke_opacity.value = SP_SCALE24_FROM_FLOAT (1.0);
172 style->stroke_opacity.set = TRUE;
174 style->opacity.value = SP_SCALE24_FROM_FLOAT (cf[3]);
175 style->opacity.set = TRUE;
176 }
178 return ret;
179 }
180 }
182 Glib::ustring GrDrag::makeStopSafeColor( gchar const *str, bool &isNull )
183 {
184 Glib::ustring colorStr;
185 if ( str ) {
186 isNull = false;
187 colorStr = str;
188 Glib::ustring::size_type pos = colorStr.find("url(#");
189 if ( pos != Glib::ustring::npos ) {
190 Glib::ustring targetName = colorStr.substr(pos + 5, colorStr.length() - 6);
191 const GSList *gradients = desktop->doc()->getResourceList("gradient");
192 for (const GSList *item = gradients; item; item = item->next) {
193 SPGradient* grad = SP_GRADIENT(item->data);
194 if ( targetName == grad->getId() ) {
195 SPGradient *vect = grad->getVector();
196 SPStop *firstStop = (vect) ? vect->getFirstStop() : grad->getFirstStop();
197 if (firstStop) {
198 Glib::ustring stopColorStr;
199 if (firstStop->currentColor) {
200 stopColorStr = firstStop->getStyleProperty("color", NULL);
201 } else {
202 stopColorStr = firstStop->specified_color.toString();
203 }
204 if ( !stopColorStr.empty() ) {
205 colorStr = stopColorStr;
206 }
207 }
208 break;
209 }
210 }
211 }
212 } else {
213 isNull = true;
214 }
216 return colorStr;
217 }
219 bool GrDrag::styleSet( const SPCSSAttr *css )
220 {
221 if (!selected) {
222 return false;
223 }
225 SPCSSAttr *stop = sp_repr_css_attr_new();
227 // See if the css contains interesting properties, and if so, translate them into the format
228 // acceptable for gradient stops
230 // any of color properties, in order of increasing priority:
231 if (css->attribute("flood-color")) {
232 sp_repr_css_set_property (stop, "stop-color", css->attribute("flood-color"));
233 }
235 if (css->attribute("lighting-color")) {
236 sp_repr_css_set_property (stop, "stop-color", css->attribute("lighting-color"));
237 }
239 if (css->attribute("color")) {
240 sp_repr_css_set_property (stop, "stop-color", css->attribute("color"));
241 }
243 if (css->attribute("stroke") && strcmp(css->attribute("stroke"), "none")) {
244 sp_repr_css_set_property (stop, "stop-color", css->attribute("stroke"));
245 }
247 if (css->attribute("fill") && strcmp(css->attribute("fill"), "none")) {
248 sp_repr_css_set_property (stop, "stop-color", css->attribute("fill"));
249 }
251 if (css->attribute("stop-color")) {
252 sp_repr_css_set_property (stop, "stop-color", css->attribute("stop-color"));
253 }
255 // Make sure the style is allowed for gradient stops.
256 if ( !sp_repr_css_property_is_unset( stop, "stop-color") ) {
257 bool stopIsNull = false;
258 Glib::ustring tmp = makeStopSafeColor( sp_repr_css_property( stop, "stop-color", "" ), stopIsNull );
259 if ( !stopIsNull && !tmp.empty() ) {
260 sp_repr_css_set_property( stop, "stop-color", tmp.c_str() );
261 }
262 }
265 if (css->attribute("stop-opacity")) { // direct setting of stop-opacity has priority
266 sp_repr_css_set_property(stop, "stop-opacity", css->attribute("stop-opacity"));
267 } else { // multiply all opacity properties:
268 gdouble accumulated = 1.0;
269 accumulated *= sp_svg_read_percentage(css->attribute("flood-opacity"), 1.0);
270 accumulated *= sp_svg_read_percentage(css->attribute("opacity"), 1.0);
271 accumulated *= sp_svg_read_percentage(css->attribute("stroke-opacity"), 1.0);
272 accumulated *= sp_svg_read_percentage(css->attribute("fill-opacity"), 1.0);
274 Inkscape::CSSOStringStream os;
275 os << accumulated;
276 sp_repr_css_set_property(stop, "stop-opacity", os.str().c_str());
278 if ((css->attribute("fill") && !css->attribute("stroke") && !strcmp(css->attribute("fill"), "none")) ||
279 (css->attribute("stroke") && !css->attribute("fill") && !strcmp(css->attribute("stroke"), "none"))) {
280 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
281 }
282 }
284 if (!stop->attributeList()) { // nothing for us here, pass it on
285 sp_repr_css_attr_unref(stop);
286 return false;
287 }
289 for (GList const* sel = selected; sel != NULL; sel = sel->next) { // for all selected draggers
290 GrDragger* dragger = reinterpret_cast<GrDragger*>(sel->data);
291 for (GSList const* i = dragger->draggables; i != NULL; i = i->next) { // for all draggables of dragger
292 GrDraggable *draggable = reinterpret_cast<GrDraggable *>(i->data);
294 local_change = true;
295 sp_item_gradient_stop_set_style(draggable->item, draggable->point_type, draggable->point_i, draggable->fill_or_stroke, stop);
296 }
297 }
299 //sp_repr_css_print(stop);
300 sp_repr_css_attr_unref(stop);
301 return true;
302 }
304 guint32 GrDrag::getColor()
305 {
306 if (!selected) return 0;
308 float cf[4];
309 cf[0] = cf[1] = cf[2] = cf[3] = 0;
311 int count = 0;
313 for (GList *i = selected; i != NULL; i = i->next) { // for all selected draggers
314 GrDragger *d = (GrDragger *) i->data;
315 for (GSList const* j = d->draggables; j != NULL; j = j->next) { // for all draggables of dragger
316 GrDraggable *draggable = (GrDraggable *) j->data;
318 guint32 c = sp_item_gradient_stop_query_style (draggable->item, draggable->point_type, draggable->point_i, draggable->fill_or_stroke);
319 cf[0] += SP_RGBA32_R_F (c);
320 cf[1] += SP_RGBA32_G_F (c);
321 cf[2] += SP_RGBA32_B_F (c);
322 cf[3] += SP_RGBA32_A_F (c);
324 count ++;
325 }
326 }
328 if (count) {
329 cf[0] /= count;
330 cf[1] /= count;
331 cf[2] /= count;
332 cf[3] /= count;
333 }
335 return SP_RGBA32_F_COMPOSE(cf[0], cf[1], cf[2], cf[3]);
336 }
338 SPStop *
339 GrDrag::addStopNearPoint (SPItem *item, Geom::Point mouse_p, double tolerance)
340 {
341 gfloat offset; // type of SPStop.offset = gfloat
342 SPGradient *gradient;
343 bool fill_or_stroke = true;
344 bool r1_knot = false;
346 bool addknot = false;
347 do {
348 gradient = sp_item_gradient (item, fill_or_stroke);
349 if (SP_IS_LINEARGRADIENT(gradient)) {
350 Geom::Point begin = sp_item_gradient_get_coords(item, POINT_LG_BEGIN, 0, fill_or_stroke);
351 Geom::Point end = sp_item_gradient_get_coords(item, POINT_LG_END, 0, fill_or_stroke);
353 Geom::Point nearest = snap_vector_midpoint (mouse_p, begin, end, 0);
354 double dist_screen = Geom::L2 (mouse_p - nearest);
355 if ( dist_screen < tolerance ) {
356 // add the knot
357 offset = get_offset_between_points(nearest, begin, end);
358 addknot = true;
359 break; // break out of the while loop: add only one knot
360 }
361 } else if (SP_IS_RADIALGRADIENT(gradient)) {
362 Geom::Point begin = sp_item_gradient_get_coords(item, POINT_RG_CENTER, 0, fill_or_stroke);
363 Geom::Point end = sp_item_gradient_get_coords(item, POINT_RG_R1, 0, fill_or_stroke);
364 Geom::Point nearest = snap_vector_midpoint (mouse_p, begin, end, 0);
365 double dist_screen = Geom::L2 (mouse_p - nearest);
366 if ( dist_screen < tolerance ) {
367 offset = get_offset_between_points(nearest, begin, end);
368 addknot = true;
369 r1_knot = true;
370 break; // break out of the while loop: add only one knot
371 }
373 end = sp_item_gradient_get_coords(item, POINT_RG_R2, 0, fill_or_stroke);
374 nearest = snap_vector_midpoint (mouse_p, begin, end, 0);
375 dist_screen = Geom::L2 (mouse_p - nearest);
376 if ( dist_screen < tolerance ) {
377 offset = get_offset_between_points(nearest, begin, end);
378 addknot = true;
379 r1_knot = false;
380 break; // break out of the while loop: add only one knot
381 }
382 }
383 fill_or_stroke = !fill_or_stroke;
384 } while (!fill_or_stroke && !addknot) ;
386 if (addknot) {
387 SPGradient *vector = sp_gradient_get_forked_vector_if_necessary (gradient, false);
388 SPStop* prev_stop = vector->getFirstStop();
389 SPStop* next_stop = prev_stop->getNextStop();
390 guint i = 1;
391 while ( (next_stop) && (next_stop->offset < offset) ) {
392 prev_stop = next_stop;
393 next_stop = next_stop->getNextStop();
394 i++;
395 }
396 if (!next_stop) {
397 // logical error: the endstop should have offset 1 and should always be more than this offset here
398 return NULL;
399 }
402 SPStop *newstop = sp_vector_add_stop (vector, prev_stop, next_stop, offset);
403 gradient->ensureVector();
404 updateDraggers();
406 return newstop;
407 }
409 return NULL;
410 }
413 bool
414 GrDrag::dropColor(SPItem */*item*/, gchar const *c, Geom::Point p)
415 {
416 // Note: not sure if a null pointer can come in for the style, but handle that just in case
417 bool stopIsNull = false;
418 Glib::ustring toUse = makeStopSafeColor( c, stopIsNull );
420 // first, see if we can drop onto one of the existing draggers
421 for (GList *i = draggers; i != NULL; i = i->next) { // for all draggables of dragger
422 GrDragger *d = (GrDragger *) i->data;
424 if (Geom::L2(p - d->point)*desktop->current_zoom() < 5) {
425 SPCSSAttr *stop = sp_repr_css_attr_new ();
426 sp_repr_css_set_property( stop, "stop-color", stopIsNull ? 0 : toUse.c_str() );
427 sp_repr_css_set_property( stop, "stop-opacity", "1" );
428 for (GSList *j = d->draggables; j != NULL; j = j->next) { // for all draggables of dragger
429 GrDraggable *draggable = (GrDraggable *) j->data;
430 local_change = true;
431 sp_item_gradient_stop_set_style (draggable->item, draggable->point_type, draggable->point_i, draggable->fill_or_stroke, stop);
432 }
433 sp_repr_css_attr_unref(stop);
434 return true;
435 }
436 }
438 // now see if we're over line and create a new stop
439 bool over_line = false;
440 SPCtrlLine *line = NULL;
441 if (lines) {
442 for (GSList *l = lines; (l != NULL) && (!over_line); l = l->next) {
443 line = (SPCtrlLine*) l->data;
444 Geom::Point nearest = snap_vector_midpoint (p, line->s, line->e, 0);
445 double dist_screen = Geom::L2 (p - nearest) * desktop->current_zoom();
446 if (line->item && dist_screen < 5) {
447 SPStop *stop = addStopNearPoint (line->item, p, 5/desktop->current_zoom());
448 if (stop) {
449 SPCSSAttr *css = sp_repr_css_attr_new ();
450 sp_repr_css_set_property( css, "stop-color", stopIsNull ? 0 : toUse.c_str() );
451 sp_repr_css_set_property( css, "stop-opacity", "1" );
452 sp_repr_css_change (SP_OBJECT_REPR (stop), css, "style");
453 return true;
454 }
455 }
456 }
457 }
459 return false;
460 }
463 GrDrag::GrDrag(SPDesktop *desktop) :
464 selected(0),
465 keep_selection(false),
466 local_change(false),
467 desktop(desktop),
468 hor_levels(),
469 vert_levels(),
470 draggers(0),
471 lines(0),
472 selection(sp_desktop_selection(desktop)),
473 sel_changed_connection(),
474 sel_modified_connection(),
475 style_set_connection(),
476 style_query_connection()
477 {
478 sel_changed_connection = selection->connectChanged(
479 sigc::bind(
480 sigc::ptr_fun(&gr_drag_sel_changed),
481 (gpointer)this )
483 );
484 sel_modified_connection = selection->connectModified(
485 sigc::bind(
486 sigc::ptr_fun(&gr_drag_sel_modified),
487 (gpointer)this )
488 );
490 style_set_connection = desktop->connectSetStyle( sigc::mem_fun(*this, &GrDrag::styleSet) );
492 style_query_connection = desktop->connectQueryStyle(
493 sigc::bind(
494 sigc::ptr_fun(&gr_drag_style_query),
495 (gpointer)this )
496 );
498 updateDraggers();
499 updateLines();
500 updateLevels();
502 if (desktop->gr_item) {
503 setSelected(getDraggerFor(desktop->gr_item, desktop->gr_point_type, desktop->gr_point_i, desktop->gr_fill_or_stroke));
504 }
505 }
507 GrDrag::~GrDrag()
508 {
509 this->sel_changed_connection.disconnect();
510 this->sel_modified_connection.disconnect();
511 this->style_set_connection.disconnect();
512 this->style_query_connection.disconnect();
514 if (this->selected) {
515 GrDraggable *draggable = (GrDraggable *) ((GrDragger*)this->selected->data)->draggables->data;
516 desktop->gr_item = draggable->item;
517 desktop->gr_point_type = draggable->point_type;
518 desktop->gr_point_i = draggable->point_i;
519 desktop->gr_fill_or_stroke = draggable->fill_or_stroke;
520 } else {
521 desktop->gr_item = NULL;
522 desktop->gr_point_type = 0;
523 desktop->gr_point_i = 0;
524 desktop->gr_fill_or_stroke = true;
525 }
527 deselect_all();
528 for (GList *l = this->draggers; l != NULL; l = l->next) {
529 delete ((GrDragger *) l->data);
530 }
531 g_list_free (this->draggers);
532 this->draggers = NULL;
533 this->selected = NULL;
535 for (GSList *l = this->lines; l != NULL; l = l->next) {
536 gtk_object_destroy( GTK_OBJECT (l->data));
537 }
538 g_slist_free (this->lines);
539 this->lines = NULL;
540 }
542 GrDraggable::GrDraggable (SPItem *item, guint point_type, guint point_i, bool fill_or_stroke)
543 {
544 this->item = item;
545 this->point_type = point_type;
546 this->point_i = point_i;
547 this->fill_or_stroke = fill_or_stroke;
549 g_object_ref (G_OBJECT (this->item));
550 }
552 GrDraggable::~GrDraggable ()
553 {
554 g_object_unref (G_OBJECT (this->item));
555 }
558 SPObject *GrDraggable::getServer()
559 {
560 if (!item) {
561 return NULL;
562 }
564 SPObject *server = NULL;
565 if (fill_or_stroke) {
566 server = item->style->getFillPaintServer();
567 }else {
568 server = item->style->getStrokePaintServer();
569 }
571 return server;
572 }
574 static void
575 gr_knot_moved_handler(SPKnot *knot, Geom::Point const &ppointer, guint state, gpointer data)
576 {
577 GrDragger *dragger = (GrDragger *) data;
578 GrDrag *drag = dragger->parent;
580 Geom::Point p = ppointer;
582 SPDesktop *desktop = dragger->parent->desktop;
583 SnapManager &m = desktop->namedview->snap_manager;
584 double snap_dist = m.snapprefs.getObjectTolerance() / dragger->parent->desktop->current_zoom();
586 if (state & GDK_SHIFT_MASK) {
587 // with Shift; unsnap if we carry more than one draggable
588 if (dragger->draggables && dragger->draggables->next) {
589 // create a new dragger
590 GrDragger *dr_new = new GrDragger (dragger->parent, dragger->point, NULL);
591 dragger->parent->draggers = g_list_prepend (dragger->parent->draggers, dr_new);
592 // relink to it all but the first draggable in the list
593 for (GSList const* i = dragger->draggables->next; i != NULL; i = i->next) {
594 GrDraggable *draggable = (GrDraggable *) i->data;
595 dr_new->addDraggable (draggable);
596 }
597 dr_new->updateKnotShape();
598 g_slist_free (dragger->draggables->next);
599 dragger->draggables->next = NULL;
600 dragger->updateKnotShape();
601 dragger->updateTip();
602 }
603 } else if (!(state & GDK_CONTROL_MASK)) {
604 // without Shift or Ctrl; see if we need to snap to another dragger
605 for (GList *di = dragger->parent->draggers; di != NULL; di = di->next) {
606 GrDragger *d_new = (GrDragger *) di->data;
607 if (dragger->mayMerge(d_new) && Geom::L2 (d_new->point - p) < snap_dist) {
609 // Merge draggers:
610 for (GSList const* i = dragger->draggables; i != NULL; i = i->next) { // for all draggables of dragger
611 GrDraggable *draggable = (GrDraggable *) i->data;
612 // copy draggable to d_new:
613 GrDraggable *da_new = new GrDraggable (draggable->item, draggable->point_type, draggable->point_i, draggable->fill_or_stroke);
614 d_new->addDraggable (da_new);
615 }
617 // unlink and delete this dragger
618 dragger->parent->draggers = g_list_remove (dragger->parent->draggers, dragger);
619 delete dragger;
621 // update the new merged dragger
622 d_new->fireDraggables(true, false, true);
623 d_new->parent->updateLines();
624 d_new->parent->setSelected (d_new);
625 d_new->updateKnotShape ();
626 d_new->updateTip ();
627 d_new->updateDependencies(true);
628 DocumentUndo::done(sp_desktop_document (d_new->parent->desktop), SP_VERB_CONTEXT_GRADIENT,
629 _("Merge gradient handles"));
630 return;
631 }
632 }
633 }
635 if (!((state & GDK_SHIFT_MASK) || (state & GDK_CONTROL_MASK))) {
636 m.setup(desktop);
637 Inkscape::SnappedPoint s = m.freeSnap(Inkscape::SnapCandidatePoint(p, Inkscape::SNAPSOURCE_OTHER_HANDLE));
638 m.unSetup();
639 if (s.getSnapped()) {
640 p = s.getPoint();
641 sp_knot_moveto (knot, p);
642 }
643 } else if (state & GDK_CONTROL_MASK) {
644 SnappedConstraints sc;
645 Inkscape::SnapCandidatePoint scp = Inkscape::SnapCandidatePoint(p, Inkscape::SNAPSOURCE_OTHER_HANDLE);
646 Inkscape::Preferences *prefs = Inkscape::Preferences::get();
647 unsigned snaps = abs(prefs->getInt("/options/rotationsnapsperpi/value", 12));
648 /* 0 means no snapping. */
650 for (GSList const* i = dragger->draggables; i != NULL; i = i->next) {
651 GrDraggable *draggable = (GrDraggable *) i->data;
653 Geom::Point dr_snap(Geom::infinity(), Geom::infinity());
655 if (draggable->point_type == POINT_LG_BEGIN || draggable->point_type == POINT_LG_END) {
656 for (GList *di = dragger->parent->draggers; di != NULL; di = di->next) {
657 GrDragger *d_new = (GrDragger *) di->data;
658 if (d_new == dragger)
659 continue;
660 if (d_new->isA (draggable->item,
661 draggable->point_type == POINT_LG_BEGIN? POINT_LG_END : POINT_LG_BEGIN,
662 draggable->fill_or_stroke)) {
663 // found the other end of the linear gradient;
664 if (state & GDK_SHIFT_MASK) {
665 // moving linear around center
666 Geom::Point center = Geom::Point (0.5*(d_new->point + dragger->point));
667 dr_snap = center;
668 } else {
669 // moving linear around the other end
670 dr_snap = d_new->point;
671 }
672 }
673 }
674 } else if (draggable->point_type == POINT_RG_R1 || draggable->point_type == POINT_RG_R2 || draggable->point_type == POINT_RG_FOCUS) {
675 for (GList *di = dragger->parent->draggers; di != NULL; di = di->next) {
676 GrDragger *d_new = (GrDragger *) di->data;
677 if (d_new == dragger)
678 continue;
679 if (d_new->isA (draggable->item,
680 POINT_RG_CENTER,
681 draggable->fill_or_stroke)) {
682 // found the center of the radial gradient;
683 dr_snap = d_new->point;
684 }
685 }
686 } else if (draggable->point_type == POINT_RG_CENTER) {
687 // radial center snaps to hor/vert relative to its original position
688 dr_snap = dragger->point_original;
689 }
691 // dr_snap contains the origin of the gradient, whereas p will be the new endpoint which we will try to snap now
692 Inkscape::SnappedPoint sp;
693 if (dr_snap.isFinite()) {
694 m.setup(desktop);
695 if (state & GDK_MOD1_MASK) {
696 // with Alt, snap to the original angle and its perpendiculars
697 sp = m.constrainedAngularSnap(scp, dragger->point_original, dr_snap, 2);
698 } else {
699 // with Ctrl, snap to M_PI/snaps
700 sp = m.constrainedAngularSnap(scp, boost::optional<Geom::Point>(), dr_snap, snaps);
701 }
702 m.unSetup();
703 sc.points.push_back(sp);
704 }
705 }
707 m.setup(desktop, false); // turn of the snap indicator temporarily
708 Inkscape::SnappedPoint bsp = m.findBestSnap(scp, sc, true);
709 m.unSetup();
710 if (!bsp.getSnapped()) {
711 // If we didn't truly snap to an object or to a grid, then we will still have to look for the
712 // closest projection onto one of the constraints. findBestSnap() will not do this for us
713 for (std::list<Inkscape::SnappedPoint>::const_iterator i = sc.points.begin(); i != sc.points.end(); i++) {
714 if (i == sc.points.begin() || (Geom::L2((*i).getPoint() - p) < Geom::L2(bsp.getPoint() - p))) {
715 bsp.setPoint((*i).getPoint());
716 bsp.setTarget(Inkscape::SNAPTARGET_CONSTRAINED_ANGLE);
717 }
718 }
719 }
720 //p = sc.points.front().getPoint();
721 p = bsp.getPoint();
722 sp_knot_moveto (knot, p);
723 }
725 drag->keep_selection = (bool) g_list_find(drag->selected, dragger);
726 bool scale_radial = (state & GDK_CONTROL_MASK) && (state & GDK_SHIFT_MASK);
728 if (drag->keep_selection) {
729 Geom::Point diff = p - dragger->point;
730 drag->selected_move_nowrite (diff[Geom::X], diff[Geom::Y], scale_radial);
731 } else {
732 dragger->point = p;
733 dragger->fireDraggables (false, scale_radial);
734 dragger->updateDependencies(false);
735 }
737 }
740 static void
741 gr_midpoint_limits(GrDragger *dragger, SPObject *server, Geom::Point *begin, Geom::Point *end, Geom::Point *low_lim, Geom::Point *high_lim, GSList **moving)
742 {
744 GrDrag *drag = dragger->parent;
745 // a midpoint dragger can (logically) only contain one GrDraggable
746 GrDraggable *draggable = (GrDraggable *) dragger->draggables->data;
748 // get begin and end points between which dragging is allowed:
749 // the draglimits are between knot(lowest_i - 1) and knot(highest_i + 1)
750 *moving = g_slist_append(*moving, dragger);
752 guint lowest_i = draggable->point_i;
753 guint highest_i = draggable->point_i;
754 GrDragger *lowest_dragger = dragger;
755 GrDragger *highest_dragger = dragger;
756 if (dragger->isSelected()) {
757 GrDragger* d_add;
758 while ( true )
759 {
760 d_add = drag->getDraggerFor(draggable->item, draggable->point_type, lowest_i - 1, draggable->fill_or_stroke);
761 if ( d_add && g_list_find(drag->selected, d_add) ) {
762 lowest_i = lowest_i - 1;
763 *moving = g_slist_prepend(*moving, d_add);
764 lowest_dragger = d_add;
765 } else {
766 break;
767 }
768 }
770 while ( true )
771 {
772 d_add = drag->getDraggerFor(draggable->item, draggable->point_type, highest_i + 1, draggable->fill_or_stroke);
773 if ( d_add && g_list_find(drag->selected, d_add) ) {
774 highest_i = highest_i + 1;
775 *moving = g_slist_append(*moving, d_add);
776 highest_dragger = d_add;
777 } else {
778 break;
779 }
780 }
781 }
783 if ( SP_IS_LINEARGRADIENT(server) ) {
784 guint num = SP_LINEARGRADIENT(server)->vector.stops.size();
785 GrDragger *d_temp;
786 if (lowest_i == 1) {
787 d_temp = drag->getDraggerFor (draggable->item, POINT_LG_BEGIN, 0, draggable->fill_or_stroke);
788 } else {
789 d_temp = drag->getDraggerFor (draggable->item, POINT_LG_MID, lowest_i - 1, draggable->fill_or_stroke);
790 }
791 if (d_temp)
792 *begin = d_temp->point;
794 d_temp = drag->getDraggerFor (draggable->item, POINT_LG_MID, highest_i + 1, draggable->fill_or_stroke);
795 if (d_temp == NULL) {
796 d_temp = drag->getDraggerFor (draggable->item, POINT_LG_END, num-1, draggable->fill_or_stroke);
797 }
798 if (d_temp)
799 *end = d_temp->point;
800 } else if ( SP_IS_RADIALGRADIENT(server) ) {
801 guint num = SP_RADIALGRADIENT(server)->vector.stops.size();
802 GrDragger *d_temp;
803 if (lowest_i == 1) {
804 d_temp = drag->getDraggerFor (draggable->item, POINT_RG_CENTER, 0, draggable->fill_or_stroke);
805 } else {
806 d_temp = drag->getDraggerFor (draggable->item, draggable->point_type, lowest_i - 1, draggable->fill_or_stroke);
807 }
808 if (d_temp)
809 *begin = d_temp->point;
811 d_temp = drag->getDraggerFor (draggable->item, draggable->point_type, highest_i + 1, draggable->fill_or_stroke);
812 if (d_temp == NULL) {
813 d_temp = drag->getDraggerFor (draggable->item, (draggable->point_type==POINT_RG_MID1) ? POINT_RG_R1 : POINT_RG_R2, num-1, draggable->fill_or_stroke);
814 }
815 if (d_temp)
816 *end = d_temp->point;
817 }
819 *low_lim = dragger->point - (lowest_dragger->point - *begin);
820 *high_lim = dragger->point - (highest_dragger->point - *end);
821 }
825 /**
826 Called when a midpoint knot is dragged.
827 */
828 static void
829 gr_knot_moved_midpoint_handler(SPKnot */*knot*/, Geom::Point const &ppointer, guint state, gpointer data)
830 {
831 GrDragger *dragger = (GrDragger *) data;
832 GrDrag *drag = dragger->parent;
833 // a midpoint dragger can (logically) only contain one GrDraggable
834 GrDraggable *draggable = (GrDraggable *) dragger->draggables->data;
836 // FIXME: take from prefs
837 double snap_fraction = 0.1;
839 Geom::Point p = ppointer;
840 Geom::Point begin(0,0), end(0,0);
841 Geom::Point low_lim(0,0), high_lim(0,0);
843 SPObject *server = draggable->getServer();
845 GSList *moving = NULL;
846 gr_midpoint_limits(dragger, server, &begin, &end, &low_lim, &high_lim, &moving);
848 if (state & GDK_CONTROL_MASK) {
849 p = snap_vector_midpoint (p, low_lim, high_lim, snap_fraction);
850 } else {
851 p = snap_vector_midpoint (p, low_lim, high_lim, 0);
852 if (!(state & GDK_SHIFT_MASK)) {
853 Inkscape::Snapper::SnapConstraint cl(low_lim, high_lim - low_lim);
854 SPDesktop *desktop = dragger->parent->desktop;
855 SnapManager &m = desktop->namedview->snap_manager;
856 m.setup(desktop);
857 m.constrainedSnapReturnByRef(p, Inkscape::SNAPSOURCE_OTHER_HANDLE, cl);
858 m.unSetup();
859 }
860 }
861 Geom::Point displacement = p - dragger->point;
863 for (GSList const* i = moving; i != NULL; i = i->next) {
864 GrDragger *drg = (GrDragger*) i->data;
865 SPKnot *drgknot = drg->knot;
866 Geom::Point this_move = displacement;
867 if (state & GDK_MOD1_MASK) {
868 // FIXME: unify all these profiles (here, in nodepath, in tweak) in one place
869 double alpha = 1.0;
870 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
871 double x = Geom::L2(drg->point - dragger->point)/Geom::L2(end - dragger->point);
872 this_move = (0.5 * cos (M_PI * (pow(x, alpha))) + 0.5) * this_move;
873 } else { // drg is on the begin side from dragger
874 double x = Geom::L2(drg->point - dragger->point)/Geom::L2(begin - dragger->point);
875 this_move = (0.5 * cos (M_PI * (pow(x, alpha))) + 0.5) * this_move;
876 }
877 }
878 drg->point += this_move;
879 sp_knot_moveto (drgknot, drg->point);
880 drg->fireDraggables (false);
881 drg->updateDependencies(false);
882 }
884 g_slist_free(moving);
886 drag->keep_selection = dragger->isSelected();
887 }
891 static void
892 gr_knot_grabbed_handler (SPKnot */*knot*/, unsigned int /*state*/, gpointer data)
893 {
894 GrDragger *dragger = (GrDragger *) data;
896 sp_canvas_force_full_redraw_after_interruptions(dragger->parent->desktop->canvas, 5);
897 }
899 /**
900 Called when the mouse releases a dragger knot; changes gradient writing to repr, updates other draggers if needed
901 */
902 static void
903 gr_knot_ungrabbed_handler (SPKnot *knot, unsigned int state, gpointer data)
904 {
905 GrDragger *dragger = (GrDragger *) data;
907 sp_canvas_end_forced_full_redraws(dragger->parent->desktop->canvas);
909 dragger->point_original = dragger->point = knot->pos;
911 if ((state & GDK_CONTROL_MASK) && (state & GDK_SHIFT_MASK)) {
912 dragger->fireDraggables (true, true);
913 } else {
914 dragger->fireDraggables (true);
915 }
917 for (GList *i = dragger->parent->selected; i != NULL; i = i->next) {
918 GrDragger *d = (GrDragger *) i->data;
919 if (d == dragger)
920 continue;
921 d->fireDraggables (true);
922 }
924 // make this dragger selected
925 if (!dragger->parent->keep_selection) {
926 dragger->parent->setSelected (dragger);
927 }
928 dragger->parent->keep_selection = false;
930 dragger->updateDependencies(true);
932 // we did an undoable action
933 DocumentUndo::done(sp_desktop_document (dragger->parent->desktop), SP_VERB_CONTEXT_GRADIENT,
934 _("Move gradient handle"));
935 }
937 /**
938 Called when a dragger knot is clicked; selects the dragger or deletes it depending on the
939 state of the keyboard keys
940 */
941 static void
942 gr_knot_clicked_handler(SPKnot */*knot*/, guint state, gpointer data)
943 {
944 GrDragger *dragger = (GrDragger *) data;
945 GrDraggable *draggable = (GrDraggable *) dragger->draggables->data;
946 if (!draggable) return;
948 if ( (state & GDK_CONTROL_MASK) && (state & GDK_MOD1_MASK ) ) {
949 // delete this knot from vector
950 SPGradient *gradient = sp_item_gradient (draggable->item, draggable->fill_or_stroke);
951 gradient = gradient->getVector();
952 if (gradient->vector.stops.size() > 2) { // 2 is the minimum
953 SPStop *stop = NULL;
954 switch (draggable->point_type) { // if we delete first or last stop, move the next/previous to the edge
955 case POINT_LG_BEGIN:
956 case POINT_RG_CENTER:
957 stop = gradient->getFirstStop();
958 {
959 SPStop *next = stop->getNextStop();
960 if (next) {
961 next->offset = 0;
962 sp_repr_set_css_double (SP_OBJECT_REPR (next), "offset", 0);
963 }
964 }
965 break;
966 case POINT_LG_END:
967 case POINT_RG_R1:
968 case POINT_RG_R2:
969 stop = sp_last_stop(gradient);
970 {
971 SPStop *prev = stop->getPrevStop();
972 if (prev) {
973 prev->offset = 1;
974 sp_repr_set_css_double (SP_OBJECT_REPR (prev), "offset", 1);
975 }
976 }
977 break;
978 case POINT_LG_MID:
979 case POINT_RG_MID1:
980 case POINT_RG_MID2:
981 stop = sp_get_stop_i(gradient, draggable->point_i);
982 break;
983 }
985 SP_OBJECT_REPR(gradient)->removeChild(SP_OBJECT_REPR(stop));
986 DocumentUndo::done(SP_OBJECT_DOCUMENT (gradient), SP_VERB_CONTEXT_GRADIENT,
987 _("Delete gradient stop"));
988 }
989 } else {
990 // select the dragger
991 dragger->point_original = dragger->point;
993 if ( state & GDK_SHIFT_MASK ) {
994 dragger->parent->setSelected (dragger, true, false);
995 } else {
996 dragger->parent->setSelected (dragger);
997 }
998 }
999 }
1001 /**
1002 Called when a dragger knot is doubleclicked; opens gradient editor with the stop from the first draggable
1003 */
1004 static void
1005 gr_knot_doubleclicked_handler (SPKnot */*knot*/, guint /*state*/, gpointer data)
1006 {
1007 GrDragger *dragger = (GrDragger *) data;
1009 dragger->point_original = dragger->point;
1011 if (dragger->draggables == NULL)
1012 return;
1014 GrDraggable *draggable = (GrDraggable *) dragger->draggables->data;
1015 sp_item_gradient_edit_stop (draggable->item, draggable->point_type, draggable->point_i, draggable->fill_or_stroke);
1016 }
1018 /**
1019 Act upon all draggables of the dragger, setting them to the dragger's point
1020 */
1021 void
1022 GrDragger::fireDraggables (bool write_repr, bool scale_radial, bool merging_focus)
1023 {
1024 for (GSList const* i = this->draggables; i != NULL; i = i->next) {
1025 GrDraggable *draggable = (GrDraggable *) i->data;
1027 // set local_change flag so that selection_changed callback does not regenerate draggers
1028 this->parent->local_change = true;
1030 // change gradient, optionally writing to repr; prevent focus from moving if it's snapped
1031 // to the center, unless it's the first update upon merge when we must snap it to the point
1032 if (merging_focus ||
1033 !(draggable->point_type == POINT_RG_FOCUS && this->isA(draggable->item, POINT_RG_CENTER, draggable->point_i, draggable->fill_or_stroke)))
1034 {
1035 sp_item_gradient_set_coords (draggable->item, draggable->point_type, draggable->point_i, this->point, draggable->fill_or_stroke, write_repr, scale_radial);
1036 }
1037 }
1038 }
1040 /**
1041 Checks if the dragger has a draggable with this point_type
1042 */
1043 bool
1044 GrDragger::isA (gint point_type)
1045 {
1046 for (GSList const* i = this->draggables; i != NULL; i = i->next) {
1047 GrDraggable *draggable = (GrDraggable *) i->data;
1048 if (draggable->point_type == point_type) {
1049 return true;
1050 }
1051 }
1052 return false;
1053 }
1055 /**
1056 Checks if the dragger has a draggable with this item, point_type + point_i (number), fill_or_stroke
1057 */
1058 bool
1059 GrDragger::isA (SPItem *item, gint point_type, gint point_i, bool fill_or_stroke)
1060 {
1061 for (GSList const* i = this->draggables; i != NULL; i = i->next) {
1062 GrDraggable *draggable = (GrDraggable *) i->data;
1063 if ( (draggable->point_type == point_type) && (draggable->point_i == point_i) && (draggable->item == item) && (draggable->fill_or_stroke == fill_or_stroke) ) {
1064 return true;
1065 }
1066 }
1067 return false;
1068 }
1070 /**
1071 Checks if the dragger has a draggable with this item, point_type, fill_or_stroke
1072 */
1073 bool
1074 GrDragger::isA (SPItem *item, gint point_type, bool fill_or_stroke)
1075 {
1076 for (GSList const* i = this->draggables; i != NULL; i = i->next) {
1077 GrDraggable *draggable = (GrDraggable *) i->data;
1078 if ( (draggable->point_type == point_type) && (draggable->item == item) && (draggable->fill_or_stroke == fill_or_stroke) ) {
1079 return true;
1080 }
1081 }
1082 return false;
1083 }
1085 bool
1086 GrDraggable::mayMerge (GrDraggable *da2)
1087 {
1088 if ((this->item == da2->item) && (this->fill_or_stroke == da2->fill_or_stroke)) {
1089 // we must not merge the points of the same gradient!
1090 if (!((this->point_type == POINT_RG_FOCUS && da2->point_type == POINT_RG_CENTER) ||
1091 (this->point_type == POINT_RG_CENTER && da2->point_type == POINT_RG_FOCUS))) {
1092 // except that we can snap center and focus together
1093 return false;
1094 }
1095 }
1096 // disable merging of midpoints.
1097 if ( (this->point_type == POINT_LG_MID) || (da2->point_type == POINT_LG_MID)
1098 || (this->point_type == POINT_RG_MID1) || (da2->point_type == POINT_RG_MID1)
1099 || (this->point_type == POINT_RG_MID2) || (da2->point_type == POINT_RG_MID2) )
1100 return false;
1102 return true;
1103 }
1105 bool
1106 GrDragger::mayMerge (GrDragger *other)
1107 {
1108 if (this == other)
1109 return false;
1111 for (GSList const* i = this->draggables; i != NULL; i = i->next) { // for all draggables of this
1112 GrDraggable *da1 = (GrDraggable *) i->data;
1113 for (GSList const* j = other->draggables; j != NULL; j = j->next) { // for all draggables of other
1114 GrDraggable *da2 = (GrDraggable *) j->data;
1115 if (!da1->mayMerge(da2))
1116 return false;
1117 }
1118 }
1119 return true;
1120 }
1122 bool
1123 GrDragger::mayMerge (GrDraggable *da2)
1124 {
1125 for (GSList const* i = this->draggables; i != NULL; i = i->next) { // for all draggables of this
1126 GrDraggable *da1 = (GrDraggable *) i->data;
1127 if (!da1->mayMerge(da2))
1128 return false;
1129 }
1130 return true;
1131 }
1133 /**
1134 Updates the statusbar tip of the dragger knot, based on its draggables
1135 */
1136 void
1137 GrDragger::updateTip ()
1138 {
1139 if (this->knot && this->knot->tip) {
1140 g_free (this->knot->tip);
1141 this->knot->tip = NULL;
1142 }
1144 if (g_slist_length (this->draggables) == 1) {
1145 GrDraggable *draggable = (GrDraggable *) this->draggables->data;
1146 char *item_desc = draggable->item->description();
1147 switch (draggable->point_type) {
1148 case POINT_LG_MID:
1149 case POINT_RG_MID1:
1150 case POINT_RG_MID2:
1151 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"),
1152 _(gr_knot_descr[draggable->point_type]),
1153 draggable->point_i,
1154 item_desc,
1155 draggable->fill_or_stroke == false ? _(" (stroke)") : "");
1156 break;
1158 default:
1159 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"),
1160 _(gr_knot_descr[draggable->point_type]),
1161 item_desc,
1162 draggable->fill_or_stroke == false ? _(" (stroke)") : "");
1163 break;
1164 }
1165 g_free(item_desc);
1166 } else if (g_slist_length (draggables) == 2 && isA (POINT_RG_CENTER) && isA (POINT_RG_FOCUS)) {
1167 this->knot->tip = g_strdup_printf (_("Radial gradient <b>center</b> and <b>focus</b>; drag with <b>Shift</b> to separate focus"));
1168 } else {
1169 int length = g_slist_length (this->draggables);
1170 this->knot->tip = g_strdup_printf (ngettext("Gradient point shared by <b>%d</b> gradient; drag with <b>Shift</b> to separate",
1171 "Gradient point shared by <b>%d</b> gradients; drag with <b>Shift</b> to separate",
1172 length),
1173 length);
1174 }
1175 }
1177 /**
1178 Adds a draggable to the dragger
1179 */
1180 void
1181 GrDragger::updateKnotShape ()
1182 {
1183 if (!draggables)
1184 return;
1185 GrDraggable *last = (GrDraggable *) g_slist_last(draggables)->data;
1186 g_object_set (G_OBJECT (this->knot->item), "shape", gr_knot_shapes[last->point_type], NULL);
1187 }
1189 /**
1190 Adds a draggable to the dragger
1191 */
1192 void
1193 GrDragger::addDraggable (GrDraggable *draggable)
1194 {
1195 this->draggables = g_slist_prepend (this->draggables, draggable);
1197 this->updateTip();
1198 }
1201 /**
1202 Moves this dragger to the point of the given draggable, acting upon all other draggables
1203 */
1204 void
1205 GrDragger::moveThisToDraggable (SPItem *item, gint point_type, gint point_i, bool fill_or_stroke, bool write_repr)
1206 {
1207 GrDraggable *dr_first = (GrDraggable *) this->draggables->data;
1208 if (!dr_first) return;
1210 this->point = sp_item_gradient_get_coords (dr_first->item, dr_first->point_type, dr_first->point_i, dr_first->fill_or_stroke);
1211 this->point_original = this->point;
1213 sp_knot_moveto (this->knot, this->point);
1215 for (GSList const* i = this->draggables; i != NULL; i = i->next) {
1216 GrDraggable *da = (GrDraggable *) i->data;
1217 if ( (da->item == item) &&
1218 (point_type == -1 || da->point_type == point_type) &&
1219 (point_i == -1 || da->point_i == point_i) &&
1220 (da->fill_or_stroke == fill_or_stroke) ) {
1221 continue;
1222 }
1223 sp_item_gradient_set_coords (da->item, da->point_type, da->point_i, this->point, da->fill_or_stroke, write_repr, false);
1224 }
1225 // FIXME: here we should also call this->updateDependencies(write_repr); to propagate updating, but how to prevent loops?
1226 }
1229 /**
1230 Moves all midstop draggables that depend on this one
1231 */
1232 void
1233 GrDragger::updateMidstopDependencies (GrDraggable *draggable, bool write_repr) {
1234 SPObject *server = draggable->getServer();
1235 if (!server)
1236 return;
1237 guint num = SP_GRADIENT(server)->vector.stops.size();
1238 if (num <= 2) return;
1240 if ( SP_IS_LINEARGRADIENT(server) ) {
1241 for ( guint i = 1; i < num - 1; i++ ) {
1242 this->moveOtherToDraggable (draggable->item, POINT_LG_MID, i, draggable->fill_or_stroke, write_repr);
1243 }
1244 } else if ( SP_IS_RADIALGRADIENT(server) ) {
1245 for ( guint i = 1; i < num - 1; i++ ) {
1246 this->moveOtherToDraggable (draggable->item, POINT_RG_MID1, i, draggable->fill_or_stroke, write_repr);
1247 this->moveOtherToDraggable (draggable->item, POINT_RG_MID2, i, draggable->fill_or_stroke, write_repr);
1248 }
1249 }
1250 }
1253 /**
1254 Moves all draggables that depend on this one
1255 */
1256 void
1257 GrDragger::updateDependencies (bool write_repr)
1258 {
1259 for (GSList const* i = this->draggables; i != NULL; i = i->next) {
1260 GrDraggable *draggable = (GrDraggable *) i->data;
1261 switch (draggable->point_type) {
1262 case POINT_LG_BEGIN:
1263 {
1264 // the end point is dependent only when dragging with ctrl+shift
1265 this->moveOtherToDraggable (draggable->item, POINT_LG_END, -1, draggable->fill_or_stroke, write_repr);
1267 this->updateMidstopDependencies (draggable, write_repr);
1268 }
1269 break;
1270 case POINT_LG_END:
1271 {
1272 // the begin point is dependent only when dragging with ctrl+shift
1273 this->moveOtherToDraggable (draggable->item, POINT_LG_BEGIN, 0, draggable->fill_or_stroke, write_repr);
1275 this->updateMidstopDependencies (draggable, write_repr);
1276 }
1277 break;
1278 case POINT_LG_MID:
1279 // no other nodes depend on mid points.
1280 break;
1281 case POINT_RG_R2:
1282 this->moveOtherToDraggable (draggable->item, POINT_RG_R1, -1, draggable->fill_or_stroke, write_repr);
1283 this->moveOtherToDraggable (draggable->item, POINT_RG_FOCUS, -1, draggable->fill_or_stroke, write_repr);
1284 this->updateMidstopDependencies (draggable, write_repr);
1285 break;
1286 case POINT_RG_R1:
1287 this->moveOtherToDraggable (draggable->item, POINT_RG_R2, -1, draggable->fill_or_stroke, write_repr);
1288 this->moveOtherToDraggable (draggable->item, POINT_RG_FOCUS, -1, draggable->fill_or_stroke, write_repr);
1289 this->updateMidstopDependencies (draggable, write_repr);
1290 break;
1291 case POINT_RG_CENTER:
1292 this->moveOtherToDraggable (draggable->item, POINT_RG_R1, -1, draggable->fill_or_stroke, write_repr);
1293 this->moveOtherToDraggable (draggable->item, POINT_RG_R2, -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_FOCUS:
1298 // nothing can depend on that
1299 break;
1300 case POINT_RG_MID1:
1301 this->moveOtherToDraggable (draggable->item, POINT_RG_MID2, draggable->point_i, draggable->fill_or_stroke, write_repr);
1302 break;
1303 case POINT_RG_MID2:
1304 this->moveOtherToDraggable (draggable->item, POINT_RG_MID1, draggable->point_i, draggable->fill_or_stroke, write_repr);
1305 break;
1306 default:
1307 break;
1308 }
1309 }
1310 }
1314 GrDragger::GrDragger (GrDrag *parent, Geom::Point p, GrDraggable *draggable)
1315 : point(p),
1316 point_original(p)
1317 {
1318 this->draggables = NULL;
1320 this->parent = parent;
1322 // create the knot
1323 this->knot = sp_knot_new (parent->desktop, NULL);
1324 this->knot->setMode(SP_KNOT_MODE_XOR);
1325 this->knot->setFill(GR_KNOT_COLOR_NORMAL, GR_KNOT_COLOR_MOUSEOVER, GR_KNOT_COLOR_MOUSEOVER);
1326 this->knot->setStroke(0x0000007f, 0x0000007f, 0x0000007f);
1327 sp_knot_update_ctrl(this->knot);
1329 // move knot to the given point
1330 sp_knot_set_position (this->knot, p, SP_KNOT_STATE_NORMAL);
1331 sp_knot_show (this->knot);
1333 // connect knot's signals
1334 if ( (draggable) // it can be NULL if a node in unsnapped (eg. focus point unsnapped from center)
1335 // luckily, midstops never snap to other nodes so are never unsnapped...
1336 && ( (draggable->point_type == POINT_LG_MID)
1337 || (draggable->point_type == POINT_RG_MID1)
1338 || (draggable->point_type == POINT_RG_MID2) ) )
1339 {
1340 this->handler_id = g_signal_connect (G_OBJECT (this->knot), "moved", G_CALLBACK (gr_knot_moved_midpoint_handler), this);
1341 } else {
1342 this->handler_id = g_signal_connect (G_OBJECT (this->knot), "moved", G_CALLBACK (gr_knot_moved_handler), this);
1343 }
1344 g_signal_connect (G_OBJECT (this->knot), "clicked", G_CALLBACK (gr_knot_clicked_handler), this);
1345 g_signal_connect (G_OBJECT (this->knot), "doubleclicked", G_CALLBACK (gr_knot_doubleclicked_handler), this);
1346 g_signal_connect (G_OBJECT (this->knot), "grabbed", G_CALLBACK (gr_knot_grabbed_handler), this);
1347 g_signal_connect (G_OBJECT (this->knot), "ungrabbed", G_CALLBACK (gr_knot_ungrabbed_handler), this);
1349 // add the initial draggable
1350 if (draggable)
1351 this->addDraggable (draggable);
1352 updateKnotShape();
1353 }
1355 GrDragger::~GrDragger ()
1356 {
1357 // unselect if it was selected
1358 this->parent->setDeselected(this);
1360 // disconnect signals
1361 g_signal_handlers_disconnect_by_func(G_OBJECT(this->knot), (gpointer) G_CALLBACK (gr_knot_moved_handler), this);
1362 g_signal_handlers_disconnect_by_func(G_OBJECT(this->knot), (gpointer) G_CALLBACK (gr_knot_clicked_handler), this);
1363 g_signal_handlers_disconnect_by_func(G_OBJECT(this->knot), (gpointer) G_CALLBACK (gr_knot_doubleclicked_handler), this);
1364 g_signal_handlers_disconnect_by_func(G_OBJECT(this->knot), (gpointer) G_CALLBACK (gr_knot_grabbed_handler), this);
1365 g_signal_handlers_disconnect_by_func(G_OBJECT(this->knot), (gpointer) G_CALLBACK (gr_knot_ungrabbed_handler), this);
1367 /* unref should call destroy */
1368 g_object_unref (G_OBJECT (this->knot));
1370 // delete all draggables
1371 for (GSList const* i = this->draggables; i != NULL; i = i->next) {
1372 delete ((GrDraggable *) i->data);
1373 }
1374 g_slist_free (this->draggables);
1375 this->draggables = NULL;
1376 }
1378 /**
1379 Select the dragger which has the given draggable.
1380 */
1381 GrDragger *
1382 GrDrag::getDraggerFor (SPItem *item, gint point_type, gint point_i, bool fill_or_stroke)
1383 {
1384 for (GList const* i = this->draggers; i != NULL; i = i->next) {
1385 GrDragger *dragger = (GrDragger *) i->data;
1386 for (GSList const* j = dragger->draggables; j != NULL; j = j->next) {
1387 GrDraggable *da2 = (GrDraggable *) j->data;
1388 if ( (da2->item == item) &&
1389 (point_type == -1 || da2->point_type == point_type) && // -1 means this does not matter
1390 (point_i == -1 || da2->point_i == point_i) && // -1 means this does not matter
1391 (da2->fill_or_stroke == fill_or_stroke)) {
1392 return (dragger);
1393 }
1394 }
1395 }
1396 return NULL;
1397 }
1400 void
1401 GrDragger::moveOtherToDraggable (SPItem *item, gint point_type, gint point_i, bool fill_or_stroke, bool write_repr)
1402 {
1403 GrDragger *d = this->parent->getDraggerFor (item, point_type, point_i, fill_or_stroke);
1404 if (d && d != this) {
1405 d->moveThisToDraggable (item, point_type, point_i, fill_or_stroke, write_repr);
1406 }
1407 }
1410 /**
1411 Draw this dragger as selected
1412 */
1413 void
1414 GrDragger::select()
1415 {
1416 this->knot->fill [SP_KNOT_STATE_NORMAL] = GR_KNOT_COLOR_SELECTED;
1417 g_object_set (G_OBJECT (this->knot->item), "fill_color", GR_KNOT_COLOR_SELECTED, NULL);
1418 }
1420 /**
1421 Draw this dragger as normal (deselected)
1422 */
1423 void
1424 GrDragger::deselect()
1425 {
1426 this->knot->fill [SP_KNOT_STATE_NORMAL] = GR_KNOT_COLOR_NORMAL;
1427 g_object_set (G_OBJECT (this->knot->item), "fill_color", GR_KNOT_COLOR_NORMAL, NULL);
1428 }
1430 bool
1431 GrDragger::isSelected()
1432 {
1433 return g_list_find (parent->selected, this);
1434 }
1436 /**
1437 \brief Deselect all stops/draggers (private)
1438 */
1439 void
1440 GrDrag::deselect_all()
1441 {
1442 while (selected) {
1443 ( (GrDragger*) selected->data)->deselect();
1444 selected = g_list_remove(selected, selected->data);
1445 }
1446 }
1448 /**
1449 \brief Deselect all stops/draggers (public; emits signal)
1450 */
1451 void
1452 GrDrag::deselectAll()
1453 {
1454 deselect_all();
1455 this->desktop->emitToolSubselectionChanged(NULL);
1456 }
1458 /**
1459 \brief Select all stops/draggers
1460 */
1461 void
1462 GrDrag::selectAll()
1463 {
1464 for (GList *l = this->draggers; l != NULL; l = l->next) {
1465 GrDragger *d = ((GrDragger *) l->data);
1466 setSelected (d, true, true);
1467 }
1468 }
1470 /**
1471 \brief Select all stops/draggers that match the coords
1472 */
1473 void
1474 GrDrag::selectByCoords(std::vector<Geom::Point> coords)
1475 {
1476 for (GList *l = this->draggers; l != NULL; l = l->next) {
1477 GrDragger *d = ((GrDragger *) l->data);
1478 for (guint k = 0; k < coords.size(); k++) {
1479 if (Geom::L2 (d->point - coords[k]) < 1e-4) {
1480 setSelected (d, true, true);
1481 }
1482 }
1483 }
1484 }
1487 /**
1488 \brief Select all stops/draggers that fall within the rect
1489 */
1490 void
1491 GrDrag::selectRect(Geom::Rect const &r)
1492 {
1493 for (GList *l = this->draggers; l != NULL; l = l->next) {
1494 GrDragger *d = ((GrDragger *) l->data);
1495 if (r.contains(d->point)) {
1496 setSelected (d, true, true);
1497 }
1498 }
1499 }
1501 /**
1502 \brief Select a dragger
1503 \param dragger The dragger to select
1504 \param add_to_selection If true, add to selection, otherwise deselect others
1505 \param override If true, always select this node, otherwise toggle selected status
1506 */
1507 void
1508 GrDrag::setSelected (GrDragger *dragger, bool add_to_selection, bool override)
1509 {
1510 GrDragger *seldragger = NULL;
1512 if (add_to_selection) {
1513 if (!dragger) return;
1514 if (override) {
1515 if (!g_list_find(selected, dragger)) {
1516 selected = g_list_prepend(selected, dragger);
1517 }
1518 dragger->select();
1519 seldragger = dragger;
1520 } else { // toggle
1521 if (g_list_find(selected, dragger)) {
1522 selected = g_list_remove(selected, dragger);
1523 dragger->deselect();
1524 if (selected) {
1525 seldragger = (GrDragger*) selected->data; // select the dragger that is first in the list
1526 }
1527 } else {
1528 selected = g_list_prepend(selected, dragger);
1529 dragger->select();
1530 seldragger = dragger;
1531 }
1532 }
1533 } else {
1534 deselect_all();
1535 if (dragger) {
1536 selected = g_list_prepend(selected, dragger);
1537 dragger->select();
1538 seldragger = dragger;
1539 }
1540 }
1541 if (seldragger) {
1542 this->desktop->emitToolSubselectionChanged((gpointer) seldragger);
1543 }
1544 }
1546 /**
1547 \brief Deselect a dragger
1548 \param dragger The dragger to deselect
1549 */
1550 void
1551 GrDrag::setDeselected (GrDragger *dragger)
1552 {
1553 if (g_list_find(selected, dragger)) {
1554 selected = g_list_remove(selected, dragger);
1555 dragger->deselect();
1556 }
1557 this->desktop->emitToolSubselectionChanged((gpointer) (selected ? selected->data : NULL ));
1558 }
1562 /**
1563 Create a line from p1 to p2 and add it to the lines list
1564 */
1565 void
1566 GrDrag::addLine (SPItem *item, Geom::Point p1, Geom::Point p2, guint32 rgba)
1567 {
1568 SPCanvasItem *line = sp_canvas_item_new(sp_desktop_controls(this->desktop),
1569 SP_TYPE_CTRLLINE, NULL);
1570 sp_canvas_item_move_to_z(line, 0);
1571 SP_CTRLLINE(line)->item = item;
1572 sp_ctrlline_set_coords(SP_CTRLLINE(line), p1, p2);
1573 if (rgba != GR_LINE_COLOR_FILL) // fill is the default, so don't set color for it to speed up redraw
1574 sp_ctrlline_set_rgba32 (SP_CTRLLINE(line), rgba);
1575 sp_canvas_item_show (line);
1576 this->lines = g_slist_append (this->lines, line);
1577 }
1579 /**
1580 If there already exists a dragger within MERGE_DIST of p, add the draggable to it; otherwise create
1581 new dragger and add it to draggers list
1582 */
1583 void
1584 GrDrag::addDragger (GrDraggable *draggable)
1585 {
1586 Geom::Point p = sp_item_gradient_get_coords (draggable->item, draggable->point_type, draggable->point_i, draggable->fill_or_stroke);
1588 for (GList *i = this->draggers; i != NULL; i = i->next) {
1589 GrDragger *dragger = (GrDragger *) i->data;
1590 if (dragger->mayMerge (draggable) && Geom::L2 (dragger->point - p) < MERGE_DIST) {
1591 // distance is small, merge this draggable into dragger, no need to create new dragger
1592 dragger->addDraggable (draggable);
1593 dragger->updateKnotShape();
1594 return;
1595 }
1596 }
1598 GrDragger *new_dragger = new GrDragger(this, p, draggable);
1599 // fixme: draggers should be added AFTER the last one: this way tabbing through them will be from begin to end.
1600 this->draggers = g_list_append (this->draggers, new_dragger);
1601 }
1603 /**
1604 Add draggers for the radial gradient rg on item
1605 */
1606 void
1607 GrDrag::addDraggersRadial (SPRadialGradient *rg, SPItem *item, bool fill_or_stroke)
1608 {
1609 addDragger (new GrDraggable (item, POINT_RG_CENTER, 0, fill_or_stroke));
1610 guint num = rg->vector.stops.size();
1611 if (num > 2) {
1612 for ( guint i = 1; i < num - 1; i++ ) {
1613 addDragger (new GrDraggable (item, POINT_RG_MID1, i, fill_or_stroke));
1614 }
1615 }
1616 addDragger (new GrDraggable (item, POINT_RG_R1, num-1, fill_or_stroke));
1617 if (num > 2) {
1618 for ( guint i = 1; i < num - 1; i++ ) {
1619 addDragger (new GrDraggable (item, POINT_RG_MID2, i, fill_or_stroke));
1620 }
1621 }
1622 addDragger (new GrDraggable (item, POINT_RG_R2, num-1, fill_or_stroke));
1623 addDragger (new GrDraggable (item, POINT_RG_FOCUS, 0, fill_or_stroke));
1624 }
1626 /**
1627 Add draggers for the linear gradient lg on item
1628 */
1629 void
1630 GrDrag::addDraggersLinear (SPLinearGradient *lg, SPItem *item, bool fill_or_stroke)
1631 {
1632 addDragger (new GrDraggable (item, POINT_LG_BEGIN, 0, fill_or_stroke));
1633 guint num = lg->vector.stops.size();
1634 if (num > 2) {
1635 for ( guint i = 1; i < num - 1; i++ ) {
1636 addDragger (new GrDraggable (item, POINT_LG_MID, i, fill_or_stroke));
1637 }
1638 }
1639 addDragger (new GrDraggable (item, POINT_LG_END, num-1, fill_or_stroke));
1640 }
1642 /**
1643 Artificially grab the knot of this dragger; used by the gradient context
1644 */
1645 void
1646 GrDrag::grabKnot (GrDragger *dragger, gint x, gint y, guint32 etime)
1647 {
1648 if (dragger) {
1649 sp_knot_start_dragging (dragger->knot, dragger->point, x, y, etime);
1650 }
1651 }
1653 /**
1654 Artificially grab the knot of the dragger with this draggable; used by the gradient context
1655 */
1656 void
1657 GrDrag::grabKnot (SPItem *item, gint point_type, gint point_i, bool fill_or_stroke, gint x, gint y, guint32 etime)
1658 {
1659 GrDragger *dragger = getDraggerFor (item, point_type, point_i, fill_or_stroke);
1660 if (dragger) {
1661 sp_knot_start_dragging (dragger->knot, dragger->point, x, y, etime);
1662 }
1663 }
1665 /**
1666 Regenerates the draggers list from the current selection; is called when selection is changed or
1667 modified, also when a radial dragger needs to update positions of other draggers in the gradient
1668 */
1669 void GrDrag::updateDraggers ()
1670 {
1671 while (selected) {
1672 selected = g_list_remove(selected, selected->data);
1673 }
1674 // delete old draggers
1675 for (GList const* i = this->draggers; i != NULL; i = i->next) {
1676 delete static_cast<GrDragger *>(i->data);
1677 }
1678 g_list_free(this->draggers);
1679 this->draggers = NULL;
1681 g_return_if_fail(this->selection != NULL);
1683 for (GSList const* i = this->selection->itemList(); i != NULL; i = i->next) {
1684 SPItem *item = SP_ITEM(i->data);
1685 SPStyle *style = item->style;
1687 if (style && (style->fill.isPaintserver())) {
1688 SPPaintServer *server = style->getFillPaintServer();
1689 if ( server && server->isSolid() ) {
1690 // Suppress "gradientness" of solid paint
1691 } else if ( SP_IS_LINEARGRADIENT(server) ) {
1692 addDraggersLinear( SP_LINEARGRADIENT(server), item, true );
1693 } else if ( SP_IS_RADIALGRADIENT(server) ) {
1694 addDraggersRadial( SP_RADIALGRADIENT(server), item, true );
1695 }
1696 }
1698 if (style && (style->stroke.isPaintserver())) {
1699 SPPaintServer *server = style->getStrokePaintServer();
1700 if ( server && server->isSolid() ) {
1701 // Suppress "gradientness" of solid paint
1702 } else if ( SP_IS_LINEARGRADIENT(server) ) {
1703 addDraggersLinear( SP_LINEARGRADIENT(server), item, false );
1704 } else if ( SP_IS_RADIALGRADIENT(server) ) {
1705 addDraggersRadial( SP_RADIALGRADIENT(server), item, false );
1706 }
1707 }
1708 }
1709 }
1712 /**
1713 * \brief Returns true if at least one of the draggers' knots has the mouse hovering above it
1714 */
1716 bool
1717 GrDrag::mouseOver()
1718 {
1719 for (GList const* i = this->draggers; i != NULL; i = i->next) {
1720 GrDragger *d = (GrDragger *) i->data;
1721 if (d->knot && (d->knot->flags & SP_KNOT_MOUSEOVER)) {
1722 return true;
1723 }
1724 }
1725 return false;
1726 }
1727 /**
1728 Regenerates the lines list from the current selection; is called on each move of a dragger, so that
1729 lines are always in sync with the actual gradient
1730 */
1731 void
1732 GrDrag::updateLines ()
1733 {
1734 // delete old lines
1735 for (GSList const *i = this->lines; i != NULL; i = i->next) {
1736 gtk_object_destroy( GTK_OBJECT (i->data));
1737 }
1738 g_slist_free (this->lines);
1739 this->lines = NULL;
1741 g_return_if_fail (this->selection != NULL);
1743 for (GSList const* i = this->selection->itemList(); i != NULL; i = i->next) {
1745 SPItem *item = SP_ITEM(i->data);
1747 SPStyle *style = SP_OBJECT_STYLE (item);
1749 if (style && (style->fill.isPaintserver())) {
1750 SPPaintServer *server = item->style->getFillPaintServer();
1751 if ( server && server->isSolid() ) {
1752 // Suppress "gradientness" of solid paint
1753 } else if ( SP_IS_LINEARGRADIENT(server) ) {
1754 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);
1755 } else if ( SP_IS_RADIALGRADIENT(server) ) {
1756 Geom::Point center = sp_item_gradient_get_coords (item, POINT_RG_CENTER, 0, true);
1757 this->addLine (item, center, sp_item_gradient_get_coords (item, POINT_RG_R1, 0, true), GR_LINE_COLOR_FILL);
1758 this->addLine (item, center, sp_item_gradient_get_coords (item, POINT_RG_R2, 0, true), GR_LINE_COLOR_FILL);
1759 }
1760 }
1762 if (style && (style->stroke.isPaintserver())) {
1763 SPPaintServer *server = item->style->getStrokePaintServer();
1764 if ( server && server->isSolid() ) {
1765 // Suppress "gradientness" of solid paint
1766 } else if ( SP_IS_LINEARGRADIENT(server) ) {
1767 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);
1768 } else if ( SP_IS_RADIALGRADIENT(server) ) {
1769 Geom::Point center = sp_item_gradient_get_coords (item, POINT_RG_CENTER, 0, false);
1770 this->addLine (item, center, sp_item_gradient_get_coords (item, POINT_RG_R1, 0, false), GR_LINE_COLOR_STROKE);
1771 this->addLine (item, center, sp_item_gradient_get_coords (item, POINT_RG_R2, 0, false), GR_LINE_COLOR_STROKE);
1772 }
1773 }
1774 }
1775 }
1777 /**
1778 Regenerates the levels list from the current selection
1779 */
1780 void
1781 GrDrag::updateLevels ()
1782 {
1783 hor_levels.clear();
1784 vert_levels.clear();
1786 g_return_if_fail (this->selection != NULL);
1788 for (GSList const* i = this->selection->itemList(); i != NULL; i = i->next) {
1789 SPItem *item = SP_ITEM(i->data);
1790 Geom::OptRect rect = item->getBboxDesktop ();
1791 if (rect) {
1792 // Remember the edges of the bbox and the center axis
1793 hor_levels.push_back(rect->min()[Geom::Y]);
1794 hor_levels.push_back(rect->max()[Geom::Y]);
1795 hor_levels.push_back(0.5 * (rect->min()[Geom::Y] + rect->max()[Geom::Y]));
1796 vert_levels.push_back(rect->min()[Geom::X]);
1797 vert_levels.push_back(rect->max()[Geom::X]);
1798 vert_levels.push_back(0.5 * (rect->min()[Geom::X] + rect->max()[Geom::X]));
1799 }
1800 }
1801 }
1803 void
1804 GrDrag::selected_reverse_vector ()
1805 {
1806 if (selected == NULL)
1807 return;
1809 for (GSList const* i = ( (GrDragger*) selected->data )->draggables; i != NULL; i = i->next) {
1810 GrDraggable *draggable = (GrDraggable *) i->data;
1812 sp_item_gradient_reverse_vector (draggable->item, draggable->fill_or_stroke);
1813 }
1814 }
1816 void
1817 GrDrag::selected_move_nowrite (double x, double y, bool scale_radial)
1818 {
1819 selected_move (x, y, false, scale_radial);
1820 }
1822 void
1823 GrDrag::selected_move (double x, double y, bool write_repr, bool scale_radial)
1824 {
1825 if (selected == NULL)
1826 return;
1828 bool did = false;
1830 for (GList *i = selected; i != NULL; i = i->next) {
1831 GrDragger *d = (GrDragger *) i->data;
1833 if (!d->isA(POINT_LG_MID) && !d->isA(POINT_RG_MID1) && !d->isA(POINT_RG_MID2)) {
1834 // if this is an endpoint,
1836 // Moving an rg center moves its focus and radii as well.
1837 // therefore, if this is a focus or radius and if selection
1838 // contains the center as well, do not move this one
1839 if (d->isA(POINT_RG_R1) || d->isA(POINT_RG_R2) ||
1840 (d->isA(POINT_RG_FOCUS) && !d->isA(POINT_RG_CENTER))) {
1841 bool skip_radius_with_center = false;
1842 for (GList *di = selected; di != NULL; di = di->next) {
1843 GrDragger *d_new = (GrDragger *) di->data;
1844 if (d_new->isA (((GrDraggable *) d->draggables->data)->item,
1845 POINT_RG_CENTER,
1846 0,
1847 ((GrDraggable *) d->draggables->data)->fill_or_stroke)) {
1848 // FIXME: here we take into account only the first draggable!
1849 skip_radius_with_center = true;
1850 }
1851 }
1852 if (skip_radius_with_center)
1853 continue;
1854 }
1856 did = true;
1857 d->point += Geom::Point (x, y);
1858 d->point_original = d->point;
1859 sp_knot_moveto (d->knot, d->point);
1861 d->fireDraggables (write_repr, scale_radial);
1863 d->updateDependencies(write_repr);
1864 }
1865 }
1867 if (write_repr && did) {
1868 // we did an undoable action
1869 DocumentUndo::maybeDone(sp_desktop_document (desktop), "grmoveh", SP_VERB_CONTEXT_GRADIENT,
1870 _("Move gradient handle(s)"));
1871 return;
1872 }
1874 if (!did) { // none of the end draggers are selected, so let's try to move the mids
1876 GrDragger *dragger = (GrDragger *) selected->data;
1877 // a midpoint dragger can (logically) only contain one GrDraggable
1878 GrDraggable *draggable = (GrDraggable *) dragger->draggables->data;
1880 Geom::Point begin(0,0), end(0,0);
1881 Geom::Point low_lim(0,0), high_lim(0,0);
1883 SPObject *server = draggable->getServer();
1884 GSList *moving = NULL;
1885 gr_midpoint_limits(dragger, server, &begin, &end, &low_lim, &high_lim, &moving);
1887 Geom::Point p(x, y);
1888 p = snap_vector_midpoint (dragger->point + p, low_lim, high_lim, 0);
1889 Geom::Point displacement = p - dragger->point;
1891 for (GSList const* i = moving; i != NULL; i = i->next) {
1892 GrDragger *drg = (GrDragger*) i->data;
1893 SPKnot *drgknot = drg->knot;
1894 drg->point += displacement;
1895 sp_knot_moveto (drgknot, drg->point);
1896 drg->fireDraggables (true);
1897 drg->updateDependencies(true);
1898 did = true;
1899 }
1901 g_slist_free(moving);
1903 if (write_repr && did) {
1904 // we did an undoable action
1905 DocumentUndo::maybeDone(sp_desktop_document (desktop), "grmovem", SP_VERB_CONTEXT_GRADIENT,
1906 _("Move gradient mid stop(s)"));
1907 }
1908 }
1909 }
1911 void
1912 GrDrag::selected_move_screen (double x, double y)
1913 {
1914 gdouble zoom = desktop->current_zoom();
1915 gdouble zx = x / zoom;
1916 gdouble zy = y / zoom;
1918 selected_move (zx, zy);
1919 }
1921 /**
1922 Select the knot next to the last selected one and deselect all other selected.
1923 */
1924 GrDragger *
1925 GrDrag::select_next ()
1926 {
1927 GrDragger *d = NULL;
1928 if (selected == NULL || g_list_find(draggers, selected->data)->next == NULL) {
1929 if (draggers)
1930 d = (GrDragger *) draggers->data;
1931 } else {
1932 d = (GrDragger *) g_list_find(draggers, selected->data)->next->data;
1933 }
1934 if (d)
1935 setSelected (d);
1936 return d;
1937 }
1939 /**
1940 Select the knot previous from the last selected one and deselect all other selected.
1941 */
1942 GrDragger *
1943 GrDrag::select_prev ()
1944 {
1945 GrDragger *d = NULL;
1946 if (selected == NULL || g_list_find(draggers, selected->data)->prev == NULL) {
1947 if (draggers)
1948 d = (GrDragger *) g_list_last (draggers)->data;
1949 } else {
1950 d = (GrDragger *) g_list_find(draggers, selected->data)->prev->data;
1951 }
1952 if (d)
1953 setSelected (d);
1954 return d;
1955 }
1958 // FIXME: i.m.o. an ugly function that I just made to work, but... aargh! (Johan)
1959 void
1960 GrDrag::deleteSelected (bool just_one)
1961 {
1962 if (!selected) return;
1964 SPDocument *document = false;
1966 struct StructStopInfo {
1967 SPStop * spstop;
1968 GrDraggable * draggable;
1969 SPGradient * gradient;
1970 SPGradient * vector;
1971 };
1973 GSList *midstoplist = NULL; // list of stops that must be deleted (will be deleted first)
1974 GSList *endstoplist = NULL; // list of stops that must be deleted
1975 while (selected) {
1976 GrDragger *dragger = (GrDragger*) selected->data;
1977 for (GSList * drgble = dragger->draggables; drgble != NULL; drgble = drgble->next) {
1978 GrDraggable *draggable = (GrDraggable*) drgble->data;
1979 SPGradient *gradient = sp_item_gradient (draggable->item, draggable->fill_or_stroke);
1980 SPGradient *vector = sp_gradient_get_forked_vector_if_necessary (gradient, false);
1982 switch (draggable->point_type) {
1983 case POINT_LG_MID:
1984 case POINT_RG_MID1:
1985 case POINT_RG_MID2:
1986 {
1987 SPStop *stop = sp_get_stop_i(vector, draggable->point_i);
1988 // check if already present in list. (e.g. when both RG_MID1 and RG_MID2 were selected)
1989 bool present = false;
1990 for (GSList const * l = midstoplist; l != NULL; l = l->next) {
1991 if ( (SPStop*)l->data == stop ) {
1992 present = true;
1993 break; // no need to search further.
1994 }
1995 }
1996 if (!present)
1997 midstoplist = g_slist_append(midstoplist, stop);
1998 }
1999 break;
2000 case POINT_LG_BEGIN:
2001 case POINT_LG_END:
2002 case POINT_RG_CENTER:
2003 case POINT_RG_R1:
2004 case POINT_RG_R2:
2005 {
2006 SPStop *stop = NULL;
2007 if ( (draggable->point_type == POINT_LG_BEGIN) || (draggable->point_type == POINT_RG_CENTER) ) {
2008 stop = vector->getFirstStop();
2009 } else {
2010 stop = sp_last_stop(vector);
2011 }
2012 if (stop) {
2013 StructStopInfo *stopinfo = new StructStopInfo;
2014 stopinfo->spstop = stop;
2015 stopinfo->draggable = draggable;
2016 stopinfo->gradient = gradient;
2017 stopinfo->vector = vector;
2018 // check if already present in list. (e.g. when both R1 and R2 were selected)
2019 bool present = false;
2020 for (GSList const * l = endstoplist; l != NULL; l = l->next) {
2021 if ( ((StructStopInfo*)l->data)->spstop == stopinfo->spstop ) {
2022 present = true;
2023 break; // no need to search further.
2024 }
2025 }
2026 if (!present)
2027 endstoplist = g_slist_append(endstoplist, stopinfo);
2028 }
2029 }
2030 break;
2031 default:
2032 break;
2033 }
2034 }
2035 selected = g_list_remove(selected, dragger);
2036 if ( just_one ) break; // iterate once if just_one is set.
2037 }
2038 while (midstoplist) {
2039 SPStop *stop = (SPStop*) midstoplist->data;
2040 document = SP_OBJECT_DOCUMENT (stop);
2041 Inkscape::XML::Node * parent = SP_OBJECT_REPR(stop)->parent();
2042 parent->removeChild(SP_OBJECT_REPR(stop));
2043 midstoplist = g_slist_remove(midstoplist, stop);
2044 }
2045 while (endstoplist) {
2046 StructStopInfo *stopinfo = (StructStopInfo*) endstoplist->data;
2047 document = SP_OBJECT_DOCUMENT (stopinfo->spstop);
2049 // 2 is the minimum, cannot delete more than that without deleting the whole vector
2050 // cannot use vector->vector.stops.size() because the vector might be invalidated by deletion of a midstop
2051 // manually count the children, don't know if there already exists a function for this...
2052 int len = 0;
2053 for ( SPObject *child = (stopinfo->vector)->firstChild() ; child ; child = child->getNext() )
2054 {
2055 if ( SP_IS_STOP(child) ) {
2056 len ++;
2057 }
2058 }
2059 if (len > 2)
2060 {
2061 switch (stopinfo->draggable->point_type) {
2062 case POINT_LG_BEGIN:
2063 {
2064 SP_OBJECT_REPR(stopinfo->vector)->removeChild(SP_OBJECT_REPR(stopinfo->spstop));
2066 SPLinearGradient *lg = SP_LINEARGRADIENT(stopinfo->gradient);
2067 Geom::Point oldbegin = Geom::Point (lg->x1.computed, lg->y1.computed);
2068 Geom::Point end = Geom::Point (lg->x2.computed, lg->y2.computed);
2069 SPStop *stop = stopinfo->vector->getFirstStop();
2070 gdouble offset = stop->offset;
2071 Geom::Point newbegin = oldbegin + offset * (end - oldbegin);
2072 lg->x1.computed = newbegin[Geom::X];
2073 lg->y1.computed = newbegin[Geom::Y];
2075 Inkscape::XML::Node *repr = SP_OBJECT_REPR(stopinfo->gradient);
2076 sp_repr_set_svg_double(repr, "x1", lg->x1.computed);
2077 sp_repr_set_svg_double(repr, "y1", lg->y1.computed);
2078 stop->offset = 0;
2079 sp_repr_set_css_double (SP_OBJECT_REPR (stop), "offset", 0);
2081 // iterate through midstops to set new offset values such that they won't move on canvas.
2082 SPStop *laststop = sp_last_stop(stopinfo->vector);
2083 stop = stop->getNextStop();
2084 while ( stop != laststop ) {
2085 stop->offset = (stop->offset - offset)/(1 - offset);
2086 sp_repr_set_css_double (SP_OBJECT_REPR (stop), "offset", stop->offset);
2087 stop = stop->getNextStop();
2088 }
2089 }
2090 break;
2091 case POINT_LG_END:
2092 {
2093 SP_OBJECT_REPR(stopinfo->vector)->removeChild(SP_OBJECT_REPR(stopinfo->spstop));
2095 SPLinearGradient *lg = SP_LINEARGRADIENT(stopinfo->gradient);
2096 Geom::Point begin = Geom::Point (lg->x1.computed, lg->y1.computed);
2097 Geom::Point oldend = Geom::Point (lg->x2.computed, lg->y2.computed);
2098 SPStop *laststop = sp_last_stop(stopinfo->vector);
2099 gdouble offset = laststop->offset;
2100 Geom::Point newend = begin + offset * (oldend - begin);
2101 lg->x2.computed = newend[Geom::X];
2102 lg->y2.computed = newend[Geom::Y];
2104 Inkscape::XML::Node *repr = SP_OBJECT_REPR(stopinfo->gradient);
2105 sp_repr_set_svg_double(repr, "x2", lg->x2.computed);
2106 sp_repr_set_svg_double(repr, "y2", lg->y2.computed);
2107 laststop->offset = 1;
2108 sp_repr_set_css_double (SP_OBJECT_REPR (laststop), "offset", 1);
2110 // iterate through midstops to set new offset values such that they won't move on canvas.
2111 SPStop *stop = stopinfo->vector->getFirstStop();
2112 stop = stop->getNextStop();
2113 while ( stop != laststop ) {
2114 stop->offset = stop->offset / offset;
2115 sp_repr_set_css_double (SP_OBJECT_REPR (stop), "offset", stop->offset);
2116 stop = stop->getNextStop();
2117 }
2118 }
2119 break;
2120 case POINT_RG_CENTER:
2121 {
2122 SPStop *newfirst = stopinfo->spstop->getNextStop();
2123 if (newfirst) {
2124 newfirst->offset = 0;
2125 sp_repr_set_css_double (SP_OBJECT_REPR (newfirst), "offset", 0);
2126 }
2127 SP_OBJECT_REPR(stopinfo->vector)->removeChild(SP_OBJECT_REPR(stopinfo->spstop));
2128 }
2129 break;
2130 case POINT_RG_R1:
2131 case POINT_RG_R2:
2132 SP_OBJECT_REPR(stopinfo->vector)->removeChild(SP_OBJECT_REPR(stopinfo->spstop));
2134 SPRadialGradient *rg = SP_RADIALGRADIENT(stopinfo->gradient);
2135 double oldradius = rg->r.computed;
2136 SPStop *laststop = sp_last_stop(stopinfo->vector);
2137 gdouble offset = laststop->offset;
2138 double newradius = offset * oldradius;
2139 rg->r.computed = newradius;
2141 Inkscape::XML::Node *repr = SP_OBJECT_REPR(rg);
2142 sp_repr_set_svg_double(repr, "r", rg->r.computed);
2143 laststop->offset = 1;
2144 sp_repr_set_css_double (SP_OBJECT_REPR (laststop), "offset", 1);
2146 // iterate through midstops to set new offset values such that they won't move on canvas.
2147 SPStop *stop = stopinfo->vector->getFirstStop();
2148 stop = stop->getNextStop();
2149 while ( stop != laststop ) {
2150 stop->offset = stop->offset / offset;
2151 sp_repr_set_css_double (SP_OBJECT_REPR (stop), "offset", stop->offset);
2152 stop = stop->getNextStop();
2153 }
2154 break;
2155 }
2156 }
2157 else
2158 { // delete the gradient from the object. set fill to unset FIXME: set to fill of unselected node?
2159 SPCSSAttr *css = sp_repr_css_attr_new ();
2161 // stopinfo->spstop is the selected stop
2162 Inkscape::XML::Node *unselectedrepr = SP_OBJECT_REPR(stopinfo->vector)->firstChild();
2163 if (unselectedrepr == SP_OBJECT_REPR(stopinfo->spstop) ) {
2164 unselectedrepr = unselectedrepr->next();
2165 }
2167 if (unselectedrepr == NULL) {
2168 if (stopinfo->draggable->fill_or_stroke) {
2169 sp_repr_css_unset_property (css, "fill");
2170 } else {
2171 sp_repr_css_unset_property (css, "stroke");
2172 }
2173 } else {
2174 SPCSSAttr *stopcss = sp_repr_css_attr(unselectedrepr, "style");
2175 if (stopinfo->draggable->fill_or_stroke) {
2176 sp_repr_css_set_property(css, "fill", sp_repr_css_property(stopcss, "stop-color", "inkscape:unset"));
2177 sp_repr_css_set_property(css, "fill-opacity", sp_repr_css_property(stopcss, "stop-opacity", "1"));
2178 } else {
2179 sp_repr_css_set_property(css, "stroke", sp_repr_css_property(stopcss, "stop-color", "inkscape:unset"));
2180 sp_repr_css_set_property(css, "stroke-opacity", sp_repr_css_property(stopcss, "stop-opacity", "1"));
2181 }
2182 sp_repr_css_attr_unref (stopcss);
2183 }
2185 sp_repr_css_change (SP_OBJECT_REPR (stopinfo->draggable->item), css, "style");
2186 sp_repr_css_attr_unref (css);
2187 }
2189 endstoplist = g_slist_remove(endstoplist, stopinfo);
2190 delete stopinfo;
2191 }
2193 if (document) {
2194 DocumentUndo::done( document, SP_VERB_CONTEXT_GRADIENT, _("Delete gradient stop(s)") );
2195 }
2196 }
2199 /*
2200 Local Variables:
2201 mode:c++
2202 c-file-style:"stroustrup"
2203 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
2204 indent-tabs-mode:nil
2205 fill-column:99
2206 End:
2207 */
2208 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4 :