25309dd614f650d5aa94b129eb623412db25e782
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 bool GrDrag::styleSet( const SPCSSAttr *css )
180 {
181 if (!selected) {
182 return false;
183 }
185 SPCSSAttr *stop = sp_repr_css_attr_new();
187 // See if the css contains interesting properties, and if so, translate them into the format
188 // acceptable for gradient stops
190 // any of color properties, in order of increasing priority:
191 if (css->attribute("flood-color")) {
192 sp_repr_css_set_property (stop, "stop-color", css->attribute("flood-color"));
193 }
195 if (css->attribute("lighting-color")) {
196 sp_repr_css_set_property (stop, "stop-color", css->attribute("lighting-color"));
197 }
199 if (css->attribute("color")) {
200 sp_repr_css_set_property (stop, "stop-color", css->attribute("color"));
201 }
203 if (css->attribute("stroke") && strcmp(css->attribute("stroke"), "none")) {
204 sp_repr_css_set_property (stop, "stop-color", css->attribute("stroke"));
205 }
207 if (css->attribute("fill") && strcmp(css->attribute("fill"), "none")) {
208 sp_repr_css_set_property (stop, "stop-color", css->attribute("fill"));
209 }
211 if (css->attribute("stop-color")) {
212 sp_repr_css_set_property (stop, "stop-color", css->attribute("stop-color"));
213 }
215 // Make sure the style is allowed for gradient stops.
216 if ( !sp_repr_css_property_is_unset( stop, "stop-color") ) {
217 Glib::ustring tmp = sp_repr_css_property( stop, "stop-color", "" );
218 Glib::ustring::size_type pos = tmp.find("url(#");
219 if ( pos != Glib::ustring::npos ) {
220 Glib::ustring targetName = tmp.substr(pos + 5, tmp.length() - 6);
221 const GSList *gradients = sp_document_get_resource_list(desktop->doc(), "gradient");
222 for (const GSList *item = gradients; item; item = item->next) {
223 SPGradient* grad = SP_GRADIENT(item->data);
224 if ( targetName == grad->getId() ) {
225 SPGradient *vect = grad->getVector();
226 SPStop *firstStop = (vect) ? vect->getFirstStop() : grad->getFirstStop();
227 if (firstStop) {
228 Glib::ustring stopColorStr;
229 if (firstStop->currentColor) {
230 stopColorStr = sp_object_get_style_property(firstStop, "color", NULL);
231 } else {
232 stopColorStr = firstStop->specified_color.toString();
233 }
234 if ( !stopColorStr.empty() ) {
235 sp_repr_css_set_property( stop, "stop-color", stopColorStr.c_str() );
236 }
237 }
238 break;
239 }
240 }
241 }
242 }
245 if (css->attribute("stop-opacity")) { // direct setting of stop-opacity has priority
246 sp_repr_css_set_property(stop, "stop-opacity", css->attribute("stop-opacity"));
247 } else { // multiply all opacity properties:
248 gdouble accumulated = 1.0;
249 accumulated *= sp_svg_read_percentage(css->attribute("flood-opacity"), 1.0);
250 accumulated *= sp_svg_read_percentage(css->attribute("opacity"), 1.0);
251 accumulated *= sp_svg_read_percentage(css->attribute("stroke-opacity"), 1.0);
252 accumulated *= sp_svg_read_percentage(css->attribute("fill-opacity"), 1.0);
254 Inkscape::CSSOStringStream os;
255 os << accumulated;
256 sp_repr_css_set_property(stop, "stop-opacity", os.str().c_str());
258 if ((css->attribute("fill") && !css->attribute("stroke") && !strcmp(css->attribute("fill"), "none")) ||
259 (css->attribute("stroke") && !css->attribute("fill") && !strcmp(css->attribute("stroke"), "none"))) {
260 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
261 }
262 }
264 if (!stop->attributeList()) { // nothing for us here, pass it on
265 sp_repr_css_attr_unref(stop);
266 return false;
267 }
269 for (GList const* sel = selected; sel != NULL; sel = sel->next) { // for all selected draggers
270 GrDragger* dragger = reinterpret_cast<GrDragger*>(sel->data);
271 for (GSList const* i = dragger->draggables; i != NULL; i = i->next) { // for all draggables of dragger
272 GrDraggable *draggable = reinterpret_cast<GrDraggable *>(i->data);
274 local_change = true;
275 sp_item_gradient_stop_set_style(draggable->item, draggable->point_type, draggable->point_i, draggable->fill_or_stroke, stop);
276 }
277 }
279 //sp_repr_css_print(stop);
280 sp_repr_css_attr_unref(stop);
281 return true;
282 }
284 guint32 GrDrag::getColor()
285 {
286 if (!selected) return 0;
288 float cf[4];
289 cf[0] = cf[1] = cf[2] = cf[3] = 0;
291 int count = 0;
293 for (GList *i = selected; i != NULL; i = i->next) { // for all selected draggers
294 GrDragger *d = (GrDragger *) i->data;
295 for (GSList const* j = d->draggables; j != NULL; j = j->next) { // for all draggables of dragger
296 GrDraggable *draggable = (GrDraggable *) j->data;
298 guint32 c = sp_item_gradient_stop_query_style (draggable->item, draggable->point_type, draggable->point_i, draggable->fill_or_stroke);
299 cf[0] += SP_RGBA32_R_F (c);
300 cf[1] += SP_RGBA32_G_F (c);
301 cf[2] += SP_RGBA32_B_F (c);
302 cf[3] += SP_RGBA32_A_F (c);
304 count ++;
305 }
306 }
308 if (count) {
309 cf[0] /= count;
310 cf[1] /= count;
311 cf[2] /= count;
312 cf[3] /= count;
313 }
315 return SP_RGBA32_F_COMPOSE(cf[0], cf[1], cf[2], cf[3]);
316 }
318 SPStop *
319 GrDrag::addStopNearPoint (SPItem *item, Geom::Point mouse_p, double tolerance)
320 {
321 gfloat offset; // type of SPStop.offset = gfloat
322 SPGradient *gradient;
323 bool fill_or_stroke = true;
324 bool r1_knot = false;
326 bool addknot = false;
327 do {
328 gradient = sp_item_gradient (item, fill_or_stroke);
329 if (SP_IS_LINEARGRADIENT(gradient)) {
330 Geom::Point begin = sp_item_gradient_get_coords(item, POINT_LG_BEGIN, 0, fill_or_stroke);
331 Geom::Point end = sp_item_gradient_get_coords(item, POINT_LG_END, 0, fill_or_stroke);
333 Geom::Point nearest = snap_vector_midpoint (mouse_p, begin, end, 0);
334 double dist_screen = Geom::L2 (mouse_p - nearest);
335 if ( dist_screen < tolerance ) {
336 // add the knot
337 offset = get_offset_between_points(nearest, begin, end);
338 addknot = true;
339 break; // break out of the while loop: add only one knot
340 }
341 } else if (SP_IS_RADIALGRADIENT(gradient)) {
342 Geom::Point begin = sp_item_gradient_get_coords(item, POINT_RG_CENTER, 0, fill_or_stroke);
343 Geom::Point end = sp_item_gradient_get_coords(item, POINT_RG_R1, 0, fill_or_stroke);
344 Geom::Point nearest = snap_vector_midpoint (mouse_p, begin, end, 0);
345 double dist_screen = Geom::L2 (mouse_p - nearest);
346 if ( dist_screen < tolerance ) {
347 offset = get_offset_between_points(nearest, begin, end);
348 addknot = true;
349 r1_knot = true;
350 break; // break out of the while loop: add only one knot
351 }
353 end = sp_item_gradient_get_coords(item, POINT_RG_R2, 0, fill_or_stroke);
354 nearest = snap_vector_midpoint (mouse_p, begin, end, 0);
355 dist_screen = Geom::L2 (mouse_p - nearest);
356 if ( dist_screen < tolerance ) {
357 offset = get_offset_between_points(nearest, begin, end);
358 addknot = true;
359 r1_knot = false;
360 break; // break out of the while loop: add only one knot
361 }
362 }
363 fill_or_stroke = !fill_or_stroke;
364 } while (!fill_or_stroke && !addknot) ;
366 if (addknot) {
367 SPGradient *vector = sp_gradient_get_forked_vector_if_necessary (gradient, false);
368 SPStop* prev_stop = vector->getFirstStop();
369 SPStop* next_stop = prev_stop->getNextStop();
370 guint i = 1;
371 while ( (next_stop) && (next_stop->offset < offset) ) {
372 prev_stop = next_stop;
373 next_stop = next_stop->getNextStop();
374 i++;
375 }
376 if (!next_stop) {
377 // logical error: the endstop should have offset 1 and should always be more than this offset here
378 return NULL;
379 }
382 SPStop *newstop = sp_vector_add_stop (vector, prev_stop, next_stop, offset);
383 gradient->ensureVector();
384 updateDraggers();
386 return newstop;
387 }
389 return NULL;
390 }
393 bool
394 GrDrag::dropColor(SPItem */*item*/, gchar const *c, Geom::Point p)
395 {
396 // first, see if we can drop onto one of the existing draggers
397 for (GList *i = draggers; i != NULL; i = i->next) { // for all draggables of dragger
398 GrDragger *d = (GrDragger *) i->data;
400 if (Geom::L2(p - d->point)*desktop->current_zoom() < 5) {
401 SPCSSAttr *stop = sp_repr_css_attr_new ();
402 sp_repr_css_set_property (stop, "stop-color", c);
403 sp_repr_css_set_property (stop, "stop-opacity", "1");
404 for (GSList *j = d->draggables; j != NULL; j = j->next) { // for all draggables of dragger
405 GrDraggable *draggable = (GrDraggable *) j->data;
406 local_change = true;
407 sp_item_gradient_stop_set_style (draggable->item, draggable->point_type, draggable->point_i, draggable->fill_or_stroke, stop);
408 }
409 sp_repr_css_attr_unref(stop);
410 return true;
411 }
412 }
414 // now see if we're over line and create a new stop
415 bool over_line = false;
416 SPCtrlLine *line = NULL;
417 if (lines) {
418 for (GSList *l = lines; (l != NULL) && (!over_line); l = l->next) {
419 line = (SPCtrlLine*) l->data;
420 Geom::Point nearest = snap_vector_midpoint (p, line->s, line->e, 0);
421 double dist_screen = Geom::L2 (p - nearest) * desktop->current_zoom();
422 if (line->item && dist_screen < 5) {
423 SPStop *stop = addStopNearPoint (line->item, p, 5/desktop->current_zoom());
424 if (stop) {
425 SPCSSAttr *css = sp_repr_css_attr_new ();
426 sp_repr_css_set_property (css, "stop-color", c);
427 sp_repr_css_set_property (css, "stop-opacity", "1");
428 sp_repr_css_change (SP_OBJECT_REPR (stop), css, "style");
429 return true;
430 }
431 }
432 }
433 }
435 return false;
436 }
439 GrDrag::GrDrag(SPDesktop *desktop) :
440 selected(0),
441 keep_selection(false),
442 local_change(false),
443 desktop(desktop),
444 hor_levels(),
445 vert_levels(),
446 draggers(0),
447 lines(0),
448 selection(sp_desktop_selection(desktop)),
449 sel_changed_connection(),
450 sel_modified_connection(),
451 style_set_connection(),
452 style_query_connection()
453 {
454 sel_changed_connection = selection->connectChanged(
455 sigc::bind(
456 sigc::ptr_fun(&gr_drag_sel_changed),
457 (gpointer)this )
459 );
460 sel_modified_connection = selection->connectModified(
461 sigc::bind(
462 sigc::ptr_fun(&gr_drag_sel_modified),
463 (gpointer)this )
464 );
466 style_set_connection = desktop->connectSetStyle( sigc::mem_fun(*this, &GrDrag::styleSet) );
468 style_query_connection = desktop->connectQueryStyle(
469 sigc::bind(
470 sigc::ptr_fun(&gr_drag_style_query),
471 (gpointer)this )
472 );
474 updateDraggers();
475 updateLines();
476 updateLevels();
478 if (desktop->gr_item) {
479 setSelected(getDraggerFor(desktop->gr_item, desktop->gr_point_type, desktop->gr_point_i, desktop->gr_fill_or_stroke));
480 }
481 }
483 GrDrag::~GrDrag()
484 {
485 this->sel_changed_connection.disconnect();
486 this->sel_modified_connection.disconnect();
487 this->style_set_connection.disconnect();
488 this->style_query_connection.disconnect();
490 if (this->selected) {
491 GrDraggable *draggable = (GrDraggable *) ((GrDragger*)this->selected->data)->draggables->data;
492 desktop->gr_item = draggable->item;
493 desktop->gr_point_type = draggable->point_type;
494 desktop->gr_point_i = draggable->point_i;
495 desktop->gr_fill_or_stroke = draggable->fill_or_stroke;
496 } else {
497 desktop->gr_item = NULL;
498 desktop->gr_point_type = 0;
499 desktop->gr_point_i = 0;
500 desktop->gr_fill_or_stroke = true;
501 }
503 deselect_all();
504 for (GList *l = this->draggers; l != NULL; l = l->next) {
505 delete ((GrDragger *) l->data);
506 }
507 g_list_free (this->draggers);
508 this->draggers = NULL;
509 this->selected = NULL;
511 for (GSList *l = this->lines; l != NULL; l = l->next) {
512 gtk_object_destroy( GTK_OBJECT (l->data));
513 }
514 g_slist_free (this->lines);
515 this->lines = NULL;
516 }
518 GrDraggable::GrDraggable (SPItem *item, guint point_type, guint point_i, bool fill_or_stroke)
519 {
520 this->item = item;
521 this->point_type = point_type;
522 this->point_i = point_i;
523 this->fill_or_stroke = fill_or_stroke;
525 g_object_ref (G_OBJECT (this->item));
526 }
528 GrDraggable::~GrDraggable ()
529 {
530 g_object_unref (G_OBJECT (this->item));
531 }
534 SPObject *GrDraggable::getServer()
535 {
536 if (!item) {
537 return NULL;
538 }
540 SPObject *server = NULL;
541 if (fill_or_stroke) {
542 server = item->style->getFillPaintServer();
543 }else {
544 server = item->style->getStrokePaintServer();
545 }
547 return server;
548 }
550 static
551 boost::optional<Geom::Point>
552 get_snap_vector (Geom::Point p, Geom::Point o, double snap, double initial)
553 {
554 double r = L2 (p - o);
555 if (r < 1e-3) {
556 return boost::optional<Geom::Point>();
557 }
559 double angle = atan2 (p - o);
560 // snap angle to snaps increments, starting from initial:
561 double a_snapped = initial + floor((angle - initial)/snap + 0.5) * snap;
562 // calculate the new position and subtract p to get the vector:
563 return (o + r * Geom::Point(cos(a_snapped), sin(a_snapped)) - p);
564 }
566 static void
567 gr_knot_moved_handler(SPKnot *knot, Geom::Point const &ppointer, guint state, gpointer data)
568 {
569 GrDragger *dragger = (GrDragger *) data;
570 GrDrag *drag = dragger->parent;
572 Geom::Point p = ppointer;
574 SPDesktop *desktop = dragger->parent->desktop;
575 SnapManager &m = desktop->namedview->snap_manager;
576 double snap_dist = m.snapprefs.getObjectTolerance() / dragger->parent->desktop->current_zoom();
578 if (state & GDK_SHIFT_MASK) {
579 // with Shift; unsnap if we carry more than one draggable
580 if (dragger->draggables && dragger->draggables->next) {
581 // create a new dragger
582 GrDragger *dr_new = new GrDragger (dragger->parent, dragger->point, NULL);
583 dragger->parent->draggers = g_list_prepend (dragger->parent->draggers, dr_new);
584 // relink to it all but the first draggable in the list
585 for (GSList const* i = dragger->draggables->next; i != NULL; i = i->next) {
586 GrDraggable *draggable = (GrDraggable *) i->data;
587 dr_new->addDraggable (draggable);
588 }
589 dr_new->updateKnotShape();
590 g_slist_free (dragger->draggables->next);
591 dragger->draggables->next = NULL;
592 dragger->updateKnotShape();
593 dragger->updateTip();
594 }
595 } else if (!(state & GDK_CONTROL_MASK)) {
596 // without Shift or Ctrl; see if we need to snap to another dragger
597 for (GList *di = dragger->parent->draggers; di != NULL; di = di->next) {
598 GrDragger *d_new = (GrDragger *) di->data;
599 if (dragger->mayMerge(d_new) && Geom::L2 (d_new->point - p) < snap_dist) {
601 // Merge draggers:
602 for (GSList const* i = dragger->draggables; i != NULL; i = i->next) { // for all draggables of dragger
603 GrDraggable *draggable = (GrDraggable *) i->data;
604 // copy draggable to d_new:
605 GrDraggable *da_new = new GrDraggable (draggable->item, draggable->point_type, draggable->point_i, draggable->fill_or_stroke);
606 d_new->addDraggable (da_new);
607 }
609 // unlink and delete this dragger
610 dragger->parent->draggers = g_list_remove (dragger->parent->draggers, dragger);
611 delete dragger;
613 // update the new merged dragger
614 d_new->fireDraggables(true, false, true);
615 d_new->parent->updateLines();
616 d_new->parent->setSelected (d_new);
617 d_new->updateKnotShape ();
618 d_new->updateTip ();
619 d_new->updateDependencies(true);
620 sp_document_done (sp_desktop_document (d_new->parent->desktop), SP_VERB_CONTEXT_GRADIENT,
621 _("Merge gradient handles"));
622 return;
623 }
624 }
625 }
627 m.setup(desktop);
628 if (!((state & GDK_SHIFT_MASK) || (state & GDK_CONTROL_MASK))) {
629 Inkscape::SnappedPoint s = m.freeSnap(Inkscape::SnapCandidatePoint(p, Inkscape::SNAPSOURCE_OTHER_HANDLE));
630 if (s.getSnapped()) {
631 p = s.getPoint();
632 sp_knot_moveto (knot, p);
633 }
634 } else if (state & GDK_CONTROL_MASK) {
635 SnappedConstraints sc;
636 Inkscape::Preferences *prefs = Inkscape::Preferences::get();
637 unsigned snaps = abs(prefs->getInt("/options/rotationsnapsperpi/value", 12));
638 /* 0 means no snapping. */
640 for (GSList const* i = dragger->draggables; i != NULL; i = i->next) {
641 GrDraggable *draggable = (GrDraggable *) i->data;
643 Geom::Point dr_snap(Geom::infinity(), Geom::infinity());
645 if (draggable->point_type == POINT_LG_BEGIN || draggable->point_type == POINT_LG_END) {
646 for (GList *di = dragger->parent->draggers; di != NULL; di = di->next) {
647 GrDragger *d_new = (GrDragger *) di->data;
648 if (d_new == dragger)
649 continue;
650 if (d_new->isA (draggable->item,
651 draggable->point_type == POINT_LG_BEGIN? POINT_LG_END : POINT_LG_BEGIN,
652 draggable->fill_or_stroke)) {
653 // found the other end of the linear gradient;
654 if (state & GDK_SHIFT_MASK) {
655 // moving linear around center
656 Geom::Point center = Geom::Point (0.5*(d_new->point + dragger->point));
657 dr_snap = center;
658 } else {
659 // moving linear around the other end
660 dr_snap = d_new->point;
661 }
662 }
663 }
664 } else if (draggable->point_type == POINT_RG_R1 || draggable->point_type == POINT_RG_R2 || draggable->point_type == POINT_RG_FOCUS) {
665 for (GList *di = dragger->parent->draggers; di != NULL; di = di->next) {
666 GrDragger *d_new = (GrDragger *) di->data;
667 if (d_new == dragger)
668 continue;
669 if (d_new->isA (draggable->item,
670 POINT_RG_CENTER,
671 draggable->fill_or_stroke)) {
672 // found the center of the radial gradient;
673 dr_snap = d_new->point;
674 }
675 }
676 } else if (draggable->point_type == POINT_RG_CENTER) {
677 // radial center snaps to hor/vert relative to its original position
678 dr_snap = dragger->point_original;
679 }
681 boost::optional<Geom::Point> snap_vector;
682 if (dr_snap.isFinite()) {
683 if (state & GDK_MOD1_MASK) {
684 // with Alt, snap to the original angle and its perpendiculars
685 snap_vector = get_snap_vector (p, dr_snap, M_PI/2, Geom::atan2 (dragger->point_original - dr_snap));
686 } else {
687 // with Ctrl, snap to M_PI/snaps
688 snap_vector = get_snap_vector (p, dr_snap, M_PI/snaps, 0);
689 }
690 if (snap_vector) {
691 Inkscape::Snapper::ConstraintLine cl(dr_snap, p + *snap_vector - dr_snap);
692 Inkscape::SnappedPoint s = m.constrainedSnap(Inkscape::SnapCandidatePoint(p + *snap_vector, Inkscape::SNAPSOURCE_OTHER_HANDLE), cl);
693 if (s.getSnapped()) {
694 s.setTransformation(s.getPoint() - p);
695 sc.points.push_back(s);
696 } else {
697 Inkscape::SnappedPoint dummy(p + *snap_vector, Inkscape::SNAPSOURCE_OTHER_HANDLE, 0, Inkscape::SNAPTARGET_CONSTRAINED_ANGLE, Geom::L2(*snap_vector), 10000, true, true, false);
698 dummy.setTransformation(*snap_vector);
699 sc.points.push_back(dummy);
700 }
701 }
702 }
703 }
705 Inkscape::SnappedPoint bsp = m.findBestSnap(Inkscape::SnapCandidatePoint(p, Inkscape::SNAPSOURCE_OTHER_HANDLE), sc, true); // snap indicator will be displayed if needed
707 if (bsp.getSnapped()) {
708 p += bsp.getTransformation();
709 sp_knot_moveto (knot, p);
710 }
711 }
713 drag->keep_selection = (bool) g_list_find(drag->selected, dragger);
714 bool scale_radial = (state & GDK_CONTROL_MASK) && (state & GDK_SHIFT_MASK);
716 if (drag->keep_selection) {
717 Geom::Point diff = p - dragger->point;
718 drag->selected_move_nowrite (diff[Geom::X], diff[Geom::Y], scale_radial);
719 } else {
720 dragger->point = p;
721 dragger->fireDraggables (false, scale_radial);
722 dragger->updateDependencies(false);
723 }
725 }
728 static void
729 gr_midpoint_limits(GrDragger *dragger, SPObject *server, Geom::Point *begin, Geom::Point *end, Geom::Point *low_lim, Geom::Point *high_lim, GSList **moving)
730 {
732 GrDrag *drag = dragger->parent;
733 // a midpoint dragger can (logically) only contain one GrDraggable
734 GrDraggable *draggable = (GrDraggable *) dragger->draggables->data;
736 // get begin and end points between which dragging is allowed:
737 // the draglimits are between knot(lowest_i - 1) and knot(highest_i + 1)
738 *moving = g_slist_append(*moving, dragger);
740 guint lowest_i = draggable->point_i;
741 guint highest_i = draggable->point_i;
742 GrDragger *lowest_dragger = dragger;
743 GrDragger *highest_dragger = dragger;
744 if (dragger->isSelected()) {
745 GrDragger* d_add;
746 while ( true )
747 {
748 d_add = drag->getDraggerFor(draggable->item, draggable->point_type, lowest_i - 1, draggable->fill_or_stroke);
749 if ( d_add && g_list_find(drag->selected, d_add) ) {
750 lowest_i = lowest_i - 1;
751 *moving = g_slist_prepend(*moving, d_add);
752 lowest_dragger = d_add;
753 } else {
754 break;
755 }
756 }
758 while ( true )
759 {
760 d_add = drag->getDraggerFor(draggable->item, draggable->point_type, highest_i + 1, draggable->fill_or_stroke);
761 if ( d_add && g_list_find(drag->selected, d_add) ) {
762 highest_i = highest_i + 1;
763 *moving = g_slist_append(*moving, d_add);
764 highest_dragger = d_add;
765 } else {
766 break;
767 }
768 }
769 }
771 if ( SP_IS_LINEARGRADIENT(server) ) {
772 guint num = SP_LINEARGRADIENT(server)->vector.stops.size();
773 GrDragger *d_temp;
774 if (lowest_i == 1) {
775 d_temp = drag->getDraggerFor (draggable->item, POINT_LG_BEGIN, 0, draggable->fill_or_stroke);
776 } else {
777 d_temp = drag->getDraggerFor (draggable->item, POINT_LG_MID, lowest_i - 1, draggable->fill_or_stroke);
778 }
779 if (d_temp)
780 *begin = d_temp->point;
782 d_temp = drag->getDraggerFor (draggable->item, POINT_LG_MID, highest_i + 1, draggable->fill_or_stroke);
783 if (d_temp == NULL) {
784 d_temp = drag->getDraggerFor (draggable->item, POINT_LG_END, num-1, draggable->fill_or_stroke);
785 }
786 if (d_temp)
787 *end = d_temp->point;
788 } else if ( SP_IS_RADIALGRADIENT(server) ) {
789 guint num = SP_RADIALGRADIENT(server)->vector.stops.size();
790 GrDragger *d_temp;
791 if (lowest_i == 1) {
792 d_temp = drag->getDraggerFor (draggable->item, POINT_RG_CENTER, 0, draggable->fill_or_stroke);
793 } else {
794 d_temp = drag->getDraggerFor (draggable->item, draggable->point_type, lowest_i - 1, draggable->fill_or_stroke);
795 }
796 if (d_temp)
797 *begin = d_temp->point;
799 d_temp = drag->getDraggerFor (draggable->item, draggable->point_type, highest_i + 1, draggable->fill_or_stroke);
800 if (d_temp == NULL) {
801 d_temp = drag->getDraggerFor (draggable->item, (draggable->point_type==POINT_RG_MID1) ? POINT_RG_R1 : POINT_RG_R2, num-1, draggable->fill_or_stroke);
802 }
803 if (d_temp)
804 *end = d_temp->point;
805 }
807 *low_lim = dragger->point - (lowest_dragger->point - *begin);
808 *high_lim = dragger->point - (highest_dragger->point - *end);
809 }
813 /**
814 Called when a midpoint knot is dragged.
815 */
816 static void
817 gr_knot_moved_midpoint_handler(SPKnot */*knot*/, Geom::Point const &ppointer, guint state, gpointer data)
818 {
819 GrDragger *dragger = (GrDragger *) data;
820 GrDrag *drag = dragger->parent;
821 // a midpoint dragger can (logically) only contain one GrDraggable
822 GrDraggable *draggable = (GrDraggable *) dragger->draggables->data;
824 // FIXME: take from prefs
825 double snap_fraction = 0.1;
827 Geom::Point p = ppointer;
828 Geom::Point begin(0,0), end(0,0);
829 Geom::Point low_lim(0,0), high_lim(0,0);
831 SPObject *server = draggable->getServer();
833 GSList *moving = NULL;
834 gr_midpoint_limits(dragger, server, &begin, &end, &low_lim, &high_lim, &moving);
836 if (state & GDK_CONTROL_MASK) {
837 p = snap_vector_midpoint (p, low_lim, high_lim, snap_fraction);
838 } else {
839 p = snap_vector_midpoint (p, low_lim, high_lim, 0);
840 if (!(state & GDK_SHIFT_MASK)) {
841 Inkscape::Snapper::ConstraintLine cl(low_lim, high_lim - low_lim);
842 SPDesktop *desktop = dragger->parent->desktop;
843 SnapManager &m = desktop->namedview->snap_manager;
844 m.setup(desktop);
845 m.constrainedSnapReturnByRef(p, Inkscape::SNAPSOURCE_OTHER_HANDLE, cl);
846 }
847 }
848 Geom::Point displacement = p - dragger->point;
850 for (GSList const* i = moving; i != NULL; i = i->next) {
851 GrDragger *drg = (GrDragger*) i->data;
852 SPKnot *drgknot = drg->knot;
853 Geom::Point this_move = displacement;
854 if (state & GDK_MOD1_MASK) {
855 // FIXME: unify all these profiles (here, in nodepath, in tweak) in one place
856 double alpha = 1.0;
857 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
858 double x = Geom::L2(drg->point - dragger->point)/Geom::L2(end - dragger->point);
859 this_move = (0.5 * cos (M_PI * (pow(x, alpha))) + 0.5) * this_move;
860 } else { // drg is on the begin side from dragger
861 double x = Geom::L2(drg->point - dragger->point)/Geom::L2(begin - dragger->point);
862 this_move = (0.5 * cos (M_PI * (pow(x, alpha))) + 0.5) * this_move;
863 }
864 }
865 drg->point += this_move;
866 sp_knot_moveto (drgknot, drg->point);
867 drg->fireDraggables (false);
868 drg->updateDependencies(false);
869 }
871 g_slist_free(moving);
873 drag->keep_selection = dragger->isSelected();
874 }
878 static void
879 gr_knot_grabbed_handler (SPKnot */*knot*/, unsigned int /*state*/, gpointer data)
880 {
881 GrDragger *dragger = (GrDragger *) data;
883 sp_canvas_force_full_redraw_after_interruptions(dragger->parent->desktop->canvas, 5);
884 }
886 /**
887 Called when the mouse releases a dragger knot; changes gradient writing to repr, updates other draggers if needed
888 */
889 static void
890 gr_knot_ungrabbed_handler (SPKnot *knot, unsigned int state, gpointer data)
891 {
892 GrDragger *dragger = (GrDragger *) data;
894 sp_canvas_end_forced_full_redraws(dragger->parent->desktop->canvas);
896 dragger->point_original = dragger->point = knot->pos;
898 if ((state & GDK_CONTROL_MASK) && (state & GDK_SHIFT_MASK)) {
899 dragger->fireDraggables (true, true);
900 } else {
901 dragger->fireDraggables (true);
902 }
904 for (GList *i = dragger->parent->selected; i != NULL; i = i->next) {
905 GrDragger *d = (GrDragger *) i->data;
906 if (d == dragger)
907 continue;
908 d->fireDraggables (true);
909 }
911 // make this dragger selected
912 if (!dragger->parent->keep_selection) {
913 dragger->parent->setSelected (dragger);
914 }
915 dragger->parent->keep_selection = false;
917 dragger->updateDependencies(true);
919 // we did an undoable action
920 sp_document_done (sp_desktop_document (dragger->parent->desktop), SP_VERB_CONTEXT_GRADIENT,
921 _("Move gradient handle"));
922 }
924 /**
925 Called when a dragger knot is clicked; selects the dragger or deletes it depending on the
926 state of the keyboard keys
927 */
928 static void
929 gr_knot_clicked_handler(SPKnot */*knot*/, guint state, gpointer data)
930 {
931 GrDragger *dragger = (GrDragger *) data;
932 GrDraggable *draggable = (GrDraggable *) dragger->draggables->data;
933 if (!draggable) return;
935 if ( (state & GDK_CONTROL_MASK) && (state & GDK_MOD1_MASK ) ) {
936 // delete this knot from vector
937 SPGradient *gradient = sp_item_gradient (draggable->item, draggable->fill_or_stroke);
938 gradient = gradient->getVector();
939 if (gradient->vector.stops.size() > 2) { // 2 is the minimum
940 SPStop *stop = NULL;
941 switch (draggable->point_type) { // if we delete first or last stop, move the next/previous to the edge
942 case POINT_LG_BEGIN:
943 case POINT_RG_CENTER:
944 stop = gradient->getFirstStop();
945 {
946 SPStop *next = stop->getNextStop();
947 if (next) {
948 next->offset = 0;
949 sp_repr_set_css_double (SP_OBJECT_REPR (next), "offset", 0);
950 }
951 }
952 break;
953 case POINT_LG_END:
954 case POINT_RG_R1:
955 case POINT_RG_R2:
956 stop = sp_last_stop(gradient);
957 {
958 SPStop *prev = stop->getPrevStop();
959 if (prev) {
960 prev->offset = 1;
961 sp_repr_set_css_double (SP_OBJECT_REPR (prev), "offset", 1);
962 }
963 }
964 break;
965 case POINT_LG_MID:
966 case POINT_RG_MID1:
967 case POINT_RG_MID2:
968 stop = sp_get_stop_i(gradient, draggable->point_i);
969 break;
970 }
972 SP_OBJECT_REPR(gradient)->removeChild(SP_OBJECT_REPR(stop));
973 sp_document_done (SP_OBJECT_DOCUMENT (gradient), SP_VERB_CONTEXT_GRADIENT,
974 _("Delete gradient stop"));
975 }
976 } else {
977 // select the dragger
978 dragger->point_original = dragger->point;
980 if ( state & GDK_SHIFT_MASK ) {
981 dragger->parent->setSelected (dragger, true, false);
982 } else {
983 dragger->parent->setSelected (dragger);
984 }
985 }
986 }
988 /**
989 Called when a dragger knot is doubleclicked; opens gradient editor with the stop from the first draggable
990 */
991 static void
992 gr_knot_doubleclicked_handler (SPKnot */*knot*/, guint /*state*/, gpointer data)
993 {
994 GrDragger *dragger = (GrDragger *) data;
996 dragger->point_original = dragger->point;
998 if (dragger->draggables == NULL)
999 return;
1001 GrDraggable *draggable = (GrDraggable *) dragger->draggables->data;
1002 sp_item_gradient_edit_stop (draggable->item, draggable->point_type, draggable->point_i, draggable->fill_or_stroke);
1003 }
1005 /**
1006 Act upon all draggables of the dragger, setting them to the dragger's point
1007 */
1008 void
1009 GrDragger::fireDraggables (bool write_repr, bool scale_radial, bool merging_focus)
1010 {
1011 for (GSList const* i = this->draggables; i != NULL; i = i->next) {
1012 GrDraggable *draggable = (GrDraggable *) i->data;
1014 // set local_change flag so that selection_changed callback does not regenerate draggers
1015 this->parent->local_change = true;
1017 // change gradient, optionally writing to repr; prevent focus from moving if it's snapped
1018 // to the center, unless it's the first update upon merge when we must snap it to the point
1019 if (merging_focus ||
1020 !(draggable->point_type == POINT_RG_FOCUS && this->isA(draggable->item, POINT_RG_CENTER, draggable->point_i, draggable->fill_or_stroke)))
1021 {
1022 sp_item_gradient_set_coords (draggable->item, draggable->point_type, draggable->point_i, this->point, draggable->fill_or_stroke, write_repr, scale_radial);
1023 }
1024 }
1025 }
1027 /**
1028 Checks if the dragger has a draggable with this point_type
1029 */
1030 bool
1031 GrDragger::isA (gint point_type)
1032 {
1033 for (GSList const* i = this->draggables; i != NULL; i = i->next) {
1034 GrDraggable *draggable = (GrDraggable *) i->data;
1035 if (draggable->point_type == point_type) {
1036 return true;
1037 }
1038 }
1039 return false;
1040 }
1042 /**
1043 Checks if the dragger has a draggable with this item, point_type + point_i (number), fill_or_stroke
1044 */
1045 bool
1046 GrDragger::isA (SPItem *item, gint point_type, gint point_i, bool fill_or_stroke)
1047 {
1048 for (GSList const* i = this->draggables; i != NULL; i = i->next) {
1049 GrDraggable *draggable = (GrDraggable *) i->data;
1050 if ( (draggable->point_type == point_type) && (draggable->point_i == point_i) && (draggable->item == item) && (draggable->fill_or_stroke == fill_or_stroke) ) {
1051 return true;
1052 }
1053 }
1054 return false;
1055 }
1057 /**
1058 Checks if the dragger has a draggable with this item, point_type, fill_or_stroke
1059 */
1060 bool
1061 GrDragger::isA (SPItem *item, gint point_type, bool fill_or_stroke)
1062 {
1063 for (GSList const* i = this->draggables; i != NULL; i = i->next) {
1064 GrDraggable *draggable = (GrDraggable *) i->data;
1065 if ( (draggable->point_type == point_type) && (draggable->item == item) && (draggable->fill_or_stroke == fill_or_stroke) ) {
1066 return true;
1067 }
1068 }
1069 return false;
1070 }
1072 bool
1073 GrDraggable::mayMerge (GrDraggable *da2)
1074 {
1075 if ((this->item == da2->item) && (this->fill_or_stroke == da2->fill_or_stroke)) {
1076 // we must not merge the points of the same gradient!
1077 if (!((this->point_type == POINT_RG_FOCUS && da2->point_type == POINT_RG_CENTER) ||
1078 (this->point_type == POINT_RG_CENTER && da2->point_type == POINT_RG_FOCUS))) {
1079 // except that we can snap center and focus together
1080 return false;
1081 }
1082 }
1083 // disable merging of midpoints.
1084 if ( (this->point_type == POINT_LG_MID) || (da2->point_type == POINT_LG_MID)
1085 || (this->point_type == POINT_RG_MID1) || (da2->point_type == POINT_RG_MID1)
1086 || (this->point_type == POINT_RG_MID2) || (da2->point_type == POINT_RG_MID2) )
1087 return false;
1089 return true;
1090 }
1092 bool
1093 GrDragger::mayMerge (GrDragger *other)
1094 {
1095 if (this == other)
1096 return false;
1098 for (GSList const* i = this->draggables; i != NULL; i = i->next) { // for all draggables of this
1099 GrDraggable *da1 = (GrDraggable *) i->data;
1100 for (GSList const* j = other->draggables; j != NULL; j = j->next) { // for all draggables of other
1101 GrDraggable *da2 = (GrDraggable *) j->data;
1102 if (!da1->mayMerge(da2))
1103 return false;
1104 }
1105 }
1106 return true;
1107 }
1109 bool
1110 GrDragger::mayMerge (GrDraggable *da2)
1111 {
1112 for (GSList const* i = this->draggables; i != NULL; i = i->next) { // for all draggables of this
1113 GrDraggable *da1 = (GrDraggable *) i->data;
1114 if (!da1->mayMerge(da2))
1115 return false;
1116 }
1117 return true;
1118 }
1120 /**
1121 Updates the statusbar tip of the dragger knot, based on its draggables
1122 */
1123 void
1124 GrDragger::updateTip ()
1125 {
1126 if (this->knot && this->knot->tip) {
1127 g_free (this->knot->tip);
1128 this->knot->tip = NULL;
1129 }
1131 if (g_slist_length (this->draggables) == 1) {
1132 GrDraggable *draggable = (GrDraggable *) this->draggables->data;
1133 char *item_desc = sp_item_description(draggable->item);
1134 switch (draggable->point_type) {
1135 case POINT_LG_MID:
1136 case POINT_RG_MID1:
1137 case POINT_RG_MID2:
1138 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"),
1139 _(gr_knot_descr[draggable->point_type]),
1140 draggable->point_i,
1141 item_desc,
1142 draggable->fill_or_stroke == false ? _(" (stroke)") : "");
1143 break;
1145 default:
1146 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"),
1147 _(gr_knot_descr[draggable->point_type]),
1148 item_desc,
1149 draggable->fill_or_stroke == false ? _(" (stroke)") : "");
1150 break;
1151 }
1152 g_free(item_desc);
1153 } else if (g_slist_length (draggables) == 2 && isA (POINT_RG_CENTER) && isA (POINT_RG_FOCUS)) {
1154 this->knot->tip = g_strdup_printf (_("Radial gradient <b>center</b> and <b>focus</b>; drag with <b>Shift</b> to separate focus"));
1155 } else {
1156 int length = g_slist_length (this->draggables);
1157 this->knot->tip = g_strdup_printf (ngettext("Gradient point shared by <b>%d</b> gradient; drag with <b>Shift</b> to separate",
1158 "Gradient point shared by <b>%d</b> gradients; drag with <b>Shift</b> to separate",
1159 length),
1160 length);
1161 }
1162 }
1164 /**
1165 Adds a draggable to the dragger
1166 */
1167 void
1168 GrDragger::updateKnotShape ()
1169 {
1170 if (!draggables)
1171 return;
1172 GrDraggable *last = (GrDraggable *) g_slist_last(draggables)->data;
1173 g_object_set (G_OBJECT (this->knot->item), "shape", gr_knot_shapes[last->point_type], NULL);
1174 }
1176 /**
1177 Adds a draggable to the dragger
1178 */
1179 void
1180 GrDragger::addDraggable (GrDraggable *draggable)
1181 {
1182 this->draggables = g_slist_prepend (this->draggables, draggable);
1184 this->updateTip();
1185 }
1188 /**
1189 Moves this dragger to the point of the given draggable, acting upon all other draggables
1190 */
1191 void
1192 GrDragger::moveThisToDraggable (SPItem *item, gint point_type, gint point_i, bool fill_or_stroke, bool write_repr)
1193 {
1194 GrDraggable *dr_first = (GrDraggable *) this->draggables->data;
1195 if (!dr_first) return;
1197 this->point = sp_item_gradient_get_coords (dr_first->item, dr_first->point_type, dr_first->point_i, dr_first->fill_or_stroke);
1198 this->point_original = this->point;
1200 sp_knot_moveto (this->knot, this->point);
1202 for (GSList const* i = this->draggables; i != NULL; i = i->next) {
1203 GrDraggable *da = (GrDraggable *) i->data;
1204 if ( (da->item == item) &&
1205 (point_type == -1 || da->point_type == point_type) &&
1206 (point_i == -1 || da->point_i == point_i) &&
1207 (da->fill_or_stroke == fill_or_stroke) ) {
1208 continue;
1209 }
1210 sp_item_gradient_set_coords (da->item, da->point_type, da->point_i, this->point, da->fill_or_stroke, write_repr, false);
1211 }
1212 // FIXME: here we should also call this->updateDependencies(write_repr); to propagate updating, but how to prevent loops?
1213 }
1216 /**
1217 Moves all midstop draggables that depend on this one
1218 */
1219 void
1220 GrDragger::updateMidstopDependencies (GrDraggable *draggable, bool write_repr) {
1221 SPObject *server = draggable->getServer();
1222 if (!server)
1223 return;
1224 guint num = SP_GRADIENT(server)->vector.stops.size();
1225 if (num <= 2) return;
1227 if ( SP_IS_LINEARGRADIENT(server) ) {
1228 for ( guint i = 1; i < num - 1; i++ ) {
1229 this->moveOtherToDraggable (draggable->item, POINT_LG_MID, i, draggable->fill_or_stroke, write_repr);
1230 }
1231 } else if ( SP_IS_RADIALGRADIENT(server) ) {
1232 for ( guint i = 1; i < num - 1; i++ ) {
1233 this->moveOtherToDraggable (draggable->item, POINT_RG_MID1, i, draggable->fill_or_stroke, write_repr);
1234 this->moveOtherToDraggable (draggable->item, POINT_RG_MID2, i, draggable->fill_or_stroke, write_repr);
1235 }
1236 }
1237 }
1240 /**
1241 Moves all draggables that depend on this one
1242 */
1243 void
1244 GrDragger::updateDependencies (bool write_repr)
1245 {
1246 for (GSList const* i = this->draggables; i != NULL; i = i->next) {
1247 GrDraggable *draggable = (GrDraggable *) i->data;
1248 switch (draggable->point_type) {
1249 case POINT_LG_BEGIN:
1250 {
1251 // the end point is dependent only when dragging with ctrl+shift
1252 this->moveOtherToDraggable (draggable->item, POINT_LG_END, -1, draggable->fill_or_stroke, write_repr);
1254 this->updateMidstopDependencies (draggable, write_repr);
1255 }
1256 break;
1257 case POINT_LG_END:
1258 {
1259 // the begin point is dependent only when dragging with ctrl+shift
1260 this->moveOtherToDraggable (draggable->item, POINT_LG_BEGIN, 0, draggable->fill_or_stroke, write_repr);
1262 this->updateMidstopDependencies (draggable, write_repr);
1263 }
1264 break;
1265 case POINT_LG_MID:
1266 // no other nodes depend on mid points.
1267 break;
1268 case POINT_RG_R2:
1269 this->moveOtherToDraggable (draggable->item, POINT_RG_R1, -1, draggable->fill_or_stroke, write_repr);
1270 this->moveOtherToDraggable (draggable->item, POINT_RG_FOCUS, -1, draggable->fill_or_stroke, write_repr);
1271 this->updateMidstopDependencies (draggable, write_repr);
1272 break;
1273 case POINT_RG_R1:
1274 this->moveOtherToDraggable (draggable->item, POINT_RG_R2, -1, draggable->fill_or_stroke, write_repr);
1275 this->moveOtherToDraggable (draggable->item, POINT_RG_FOCUS, -1, draggable->fill_or_stroke, write_repr);
1276 this->updateMidstopDependencies (draggable, write_repr);
1277 break;
1278 case POINT_RG_CENTER:
1279 this->moveOtherToDraggable (draggable->item, POINT_RG_R1, -1, draggable->fill_or_stroke, write_repr);
1280 this->moveOtherToDraggable (draggable->item, POINT_RG_R2, -1, draggable->fill_or_stroke, write_repr);
1281 this->moveOtherToDraggable (draggable->item, POINT_RG_FOCUS, -1, draggable->fill_or_stroke, write_repr);
1282 this->updateMidstopDependencies (draggable, write_repr);
1283 break;
1284 case POINT_RG_FOCUS:
1285 // nothing can depend on that
1286 break;
1287 case POINT_RG_MID1:
1288 this->moveOtherToDraggable (draggable->item, POINT_RG_MID2, draggable->point_i, draggable->fill_or_stroke, write_repr);
1289 break;
1290 case POINT_RG_MID2:
1291 this->moveOtherToDraggable (draggable->item, POINT_RG_MID1, draggable->point_i, draggable->fill_or_stroke, write_repr);
1292 break;
1293 default:
1294 break;
1295 }
1296 }
1297 }
1301 GrDragger::GrDragger (GrDrag *parent, Geom::Point p, GrDraggable *draggable)
1302 : point(p),
1303 point_original(p)
1304 {
1305 this->draggables = NULL;
1307 this->parent = parent;
1309 // create the knot
1310 this->knot = sp_knot_new (parent->desktop, NULL);
1311 this->knot->setMode(SP_KNOT_MODE_XOR);
1312 this->knot->setFill(GR_KNOT_COLOR_NORMAL, GR_KNOT_COLOR_MOUSEOVER, GR_KNOT_COLOR_MOUSEOVER);
1313 this->knot->setStroke(0x0000007f, 0x0000007f, 0x0000007f);
1314 sp_knot_update_ctrl(this->knot);
1316 // move knot to the given point
1317 sp_knot_set_position (this->knot, p, SP_KNOT_STATE_NORMAL);
1318 sp_knot_show (this->knot);
1320 // connect knot's signals
1321 if ( (draggable) // it can be NULL if a node in unsnapped (eg. focus point unsnapped from center)
1322 // luckily, midstops never snap to other nodes so are never unsnapped...
1323 && ( (draggable->point_type == POINT_LG_MID)
1324 || (draggable->point_type == POINT_RG_MID1)
1325 || (draggable->point_type == POINT_RG_MID2) ) )
1326 {
1327 this->handler_id = g_signal_connect (G_OBJECT (this->knot), "moved", G_CALLBACK (gr_knot_moved_midpoint_handler), this);
1328 } else {
1329 this->handler_id = g_signal_connect (G_OBJECT (this->knot), "moved", G_CALLBACK (gr_knot_moved_handler), this);
1330 }
1331 g_signal_connect (G_OBJECT (this->knot), "clicked", G_CALLBACK (gr_knot_clicked_handler), this);
1332 g_signal_connect (G_OBJECT (this->knot), "doubleclicked", G_CALLBACK (gr_knot_doubleclicked_handler), this);
1333 g_signal_connect (G_OBJECT (this->knot), "grabbed", G_CALLBACK (gr_knot_grabbed_handler), this);
1334 g_signal_connect (G_OBJECT (this->knot), "ungrabbed", G_CALLBACK (gr_knot_ungrabbed_handler), this);
1336 // add the initial draggable
1337 if (draggable)
1338 this->addDraggable (draggable);
1339 updateKnotShape();
1340 }
1342 GrDragger::~GrDragger ()
1343 {
1344 // unselect if it was selected
1345 this->parent->setDeselected(this);
1347 // disconnect signals
1348 g_signal_handlers_disconnect_by_func(G_OBJECT(this->knot), (gpointer) G_CALLBACK (gr_knot_moved_handler), this);
1349 g_signal_handlers_disconnect_by_func(G_OBJECT(this->knot), (gpointer) G_CALLBACK (gr_knot_clicked_handler), this);
1350 g_signal_handlers_disconnect_by_func(G_OBJECT(this->knot), (gpointer) G_CALLBACK (gr_knot_doubleclicked_handler), this);
1351 g_signal_handlers_disconnect_by_func(G_OBJECT(this->knot), (gpointer) G_CALLBACK (gr_knot_grabbed_handler), this);
1352 g_signal_handlers_disconnect_by_func(G_OBJECT(this->knot), (gpointer) G_CALLBACK (gr_knot_ungrabbed_handler), this);
1354 /* unref should call destroy */
1355 g_object_unref (G_OBJECT (this->knot));
1357 // delete all draggables
1358 for (GSList const* i = this->draggables; i != NULL; i = i->next) {
1359 delete ((GrDraggable *) i->data);
1360 }
1361 g_slist_free (this->draggables);
1362 this->draggables = NULL;
1363 }
1365 /**
1366 Select the dragger which has the given draggable.
1367 */
1368 GrDragger *
1369 GrDrag::getDraggerFor (SPItem *item, gint point_type, gint point_i, bool fill_or_stroke)
1370 {
1371 for (GList const* i = this->draggers; i != NULL; i = i->next) {
1372 GrDragger *dragger = (GrDragger *) i->data;
1373 for (GSList const* j = dragger->draggables; j != NULL; j = j->next) {
1374 GrDraggable *da2 = (GrDraggable *) j->data;
1375 if ( (da2->item == item) &&
1376 (point_type == -1 || da2->point_type == point_type) && // -1 means this does not matter
1377 (point_i == -1 || da2->point_i == point_i) && // -1 means this does not matter
1378 (da2->fill_or_stroke == fill_or_stroke)) {
1379 return (dragger);
1380 }
1381 }
1382 }
1383 return NULL;
1384 }
1387 void
1388 GrDragger::moveOtherToDraggable (SPItem *item, gint point_type, gint point_i, bool fill_or_stroke, bool write_repr)
1389 {
1390 GrDragger *d = this->parent->getDraggerFor (item, point_type, point_i, fill_or_stroke);
1391 if (d && d != this) {
1392 d->moveThisToDraggable (item, point_type, point_i, fill_or_stroke, write_repr);
1393 }
1394 }
1397 /**
1398 Draw this dragger as selected
1399 */
1400 void
1401 GrDragger::select()
1402 {
1403 this->knot->fill [SP_KNOT_STATE_NORMAL] = GR_KNOT_COLOR_SELECTED;
1404 g_object_set (G_OBJECT (this->knot->item), "fill_color", GR_KNOT_COLOR_SELECTED, NULL);
1405 }
1407 /**
1408 Draw this dragger as normal (deselected)
1409 */
1410 void
1411 GrDragger::deselect()
1412 {
1413 this->knot->fill [SP_KNOT_STATE_NORMAL] = GR_KNOT_COLOR_NORMAL;
1414 g_object_set (G_OBJECT (this->knot->item), "fill_color", GR_KNOT_COLOR_NORMAL, NULL);
1415 }
1417 bool
1418 GrDragger::isSelected()
1419 {
1420 return g_list_find (parent->selected, this);
1421 }
1423 /**
1424 \brief Deselect all stops/draggers (private)
1425 */
1426 void
1427 GrDrag::deselect_all()
1428 {
1429 while (selected) {
1430 ( (GrDragger*) selected->data)->deselect();
1431 selected = g_list_remove(selected, selected->data);
1432 }
1433 }
1435 /**
1436 \brief Deselect all stops/draggers (public; emits signal)
1437 */
1438 void
1439 GrDrag::deselectAll()
1440 {
1441 deselect_all();
1442 this->desktop->emitToolSubselectionChanged(NULL);
1443 }
1445 /**
1446 \brief Select all stops/draggers
1447 */
1448 void
1449 GrDrag::selectAll()
1450 {
1451 for (GList *l = this->draggers; l != NULL; l = l->next) {
1452 GrDragger *d = ((GrDragger *) l->data);
1453 setSelected (d, true, true);
1454 }
1455 }
1457 /**
1458 \brief Select all stops/draggers that match the coords
1459 */
1460 void
1461 GrDrag::selectByCoords(std::vector<Geom::Point> coords)
1462 {
1463 for (GList *l = this->draggers; l != NULL; l = l->next) {
1464 GrDragger *d = ((GrDragger *) l->data);
1465 for (guint k = 0; k < coords.size(); k++) {
1466 if (Geom::L2 (d->point - coords[k]) < 1e-4) {
1467 setSelected (d, true, true);
1468 }
1469 }
1470 }
1471 }
1474 /**
1475 \brief Select all stops/draggers that fall within the rect
1476 */
1477 void
1478 GrDrag::selectRect(Geom::Rect const &r)
1479 {
1480 for (GList *l = this->draggers; l != NULL; l = l->next) {
1481 GrDragger *d = ((GrDragger *) l->data);
1482 if (r.contains(d->point)) {
1483 setSelected (d, true, true);
1484 }
1485 }
1486 }
1488 /**
1489 \brief Select a dragger
1490 \param dragger The dragger to select
1491 \param add_to_selection If true, add to selection, otherwise deselect others
1492 \param override If true, always select this node, otherwise toggle selected status
1493 */
1494 void
1495 GrDrag::setSelected (GrDragger *dragger, bool add_to_selection, bool override)
1496 {
1497 GrDragger *seldragger = NULL;
1499 if (add_to_selection) {
1500 if (!dragger) return;
1501 if (override) {
1502 if (!g_list_find(selected, dragger)) {
1503 selected = g_list_prepend(selected, dragger);
1504 }
1505 dragger->select();
1506 seldragger = dragger;
1507 } else { // toggle
1508 if (g_list_find(selected, dragger)) {
1509 selected = g_list_remove(selected, dragger);
1510 dragger->deselect();
1511 if (selected) {
1512 seldragger = (GrDragger*) selected->data; // select the dragger that is first in the list
1513 }
1514 } else {
1515 selected = g_list_prepend(selected, dragger);
1516 dragger->select();
1517 seldragger = dragger;
1518 }
1519 }
1520 } else {
1521 deselect_all();
1522 if (dragger) {
1523 selected = g_list_prepend(selected, dragger);
1524 dragger->select();
1525 seldragger = dragger;
1526 }
1527 }
1528 if (seldragger) {
1529 this->desktop->emitToolSubselectionChanged((gpointer) seldragger);
1530 }
1531 }
1533 /**
1534 \brief Deselect a dragger
1535 \param dragger The dragger to deselect
1536 */
1537 void
1538 GrDrag::setDeselected (GrDragger *dragger)
1539 {
1540 if (g_list_find(selected, dragger)) {
1541 selected = g_list_remove(selected, dragger);
1542 dragger->deselect();
1543 }
1544 this->desktop->emitToolSubselectionChanged((gpointer) (selected ? selected->data : NULL ));
1545 }
1549 /**
1550 Create a line from p1 to p2 and add it to the lines list
1551 */
1552 void
1553 GrDrag::addLine (SPItem *item, Geom::Point p1, Geom::Point p2, guint32 rgba)
1554 {
1555 SPCanvasItem *line = sp_canvas_item_new(sp_desktop_controls(this->desktop),
1556 SP_TYPE_CTRLLINE, NULL);
1557 sp_canvas_item_move_to_z(line, 0);
1558 SP_CTRLLINE(line)->item = item;
1559 sp_ctrlline_set_coords(SP_CTRLLINE(line), p1, p2);
1560 if (rgba != GR_LINE_COLOR_FILL) // fill is the default, so don't set color for it to speed up redraw
1561 sp_ctrlline_set_rgba32 (SP_CTRLLINE(line), rgba);
1562 sp_canvas_item_show (line);
1563 this->lines = g_slist_append (this->lines, line);
1564 }
1566 /**
1567 If there already exists a dragger within MERGE_DIST of p, add the draggable to it; otherwise create
1568 new dragger and add it to draggers list
1569 */
1570 void
1571 GrDrag::addDragger (GrDraggable *draggable)
1572 {
1573 Geom::Point p = sp_item_gradient_get_coords (draggable->item, draggable->point_type, draggable->point_i, draggable->fill_or_stroke);
1575 for (GList *i = this->draggers; i != NULL; i = i->next) {
1576 GrDragger *dragger = (GrDragger *) i->data;
1577 if (dragger->mayMerge (draggable) && Geom::L2 (dragger->point - p) < MERGE_DIST) {
1578 // distance is small, merge this draggable into dragger, no need to create new dragger
1579 dragger->addDraggable (draggable);
1580 dragger->updateKnotShape();
1581 return;
1582 }
1583 }
1585 GrDragger *new_dragger = new GrDragger(this, p, draggable);
1586 // fixme: draggers should be added AFTER the last one: this way tabbing through them will be from begin to end.
1587 this->draggers = g_list_append (this->draggers, new_dragger);
1588 }
1590 /**
1591 Add draggers for the radial gradient rg on item
1592 */
1593 void
1594 GrDrag::addDraggersRadial (SPRadialGradient *rg, SPItem *item, bool fill_or_stroke)
1595 {
1596 addDragger (new GrDraggable (item, POINT_RG_CENTER, 0, fill_or_stroke));
1597 guint num = rg->vector.stops.size();
1598 if (num > 2) {
1599 for ( guint i = 1; i < num - 1; i++ ) {
1600 addDragger (new GrDraggable (item, POINT_RG_MID1, i, fill_or_stroke));
1601 }
1602 }
1603 addDragger (new GrDraggable (item, POINT_RG_R1, num-1, fill_or_stroke));
1604 if (num > 2) {
1605 for ( guint i = 1; i < num - 1; i++ ) {
1606 addDragger (new GrDraggable (item, POINT_RG_MID2, i, fill_or_stroke));
1607 }
1608 }
1609 addDragger (new GrDraggable (item, POINT_RG_R2, num-1, fill_or_stroke));
1610 addDragger (new GrDraggable (item, POINT_RG_FOCUS, 0, fill_or_stroke));
1611 }
1613 /**
1614 Add draggers for the linear gradient lg on item
1615 */
1616 void
1617 GrDrag::addDraggersLinear (SPLinearGradient *lg, SPItem *item, bool fill_or_stroke)
1618 {
1619 addDragger (new GrDraggable (item, POINT_LG_BEGIN, 0, fill_or_stroke));
1620 guint num = lg->vector.stops.size();
1621 if (num > 2) {
1622 for ( guint i = 1; i < num - 1; i++ ) {
1623 addDragger (new GrDraggable (item, POINT_LG_MID, i, fill_or_stroke));
1624 }
1625 }
1626 addDragger (new GrDraggable (item, POINT_LG_END, num-1, fill_or_stroke));
1627 }
1629 /**
1630 Artificially grab the knot of this dragger; used by the gradient context
1631 */
1632 void
1633 GrDrag::grabKnot (GrDragger *dragger, gint x, gint y, guint32 etime)
1634 {
1635 if (dragger) {
1636 sp_knot_start_dragging (dragger->knot, dragger->point, x, y, etime);
1637 }
1638 }
1640 /**
1641 Artificially grab the knot of the dragger with this draggable; used by the gradient context
1642 */
1643 void
1644 GrDrag::grabKnot (SPItem *item, gint point_type, gint point_i, bool fill_or_stroke, gint x, gint y, guint32 etime)
1645 {
1646 GrDragger *dragger = getDraggerFor (item, point_type, point_i, fill_or_stroke);
1647 if (dragger) {
1648 sp_knot_start_dragging (dragger->knot, dragger->point, x, y, etime);
1649 }
1650 }
1652 /**
1653 Regenerates the draggers list from the current selection; is called when selection is changed or
1654 modified, also when a radial dragger needs to update positions of other draggers in the gradient
1655 */
1656 void GrDrag::updateDraggers ()
1657 {
1658 while (selected) {
1659 selected = g_list_remove(selected, selected->data);
1660 }
1661 // delete old draggers
1662 for (GList const* i = this->draggers; i != NULL; i = i->next) {
1663 delete static_cast<GrDragger *>(i->data);
1664 }
1665 g_list_free(this->draggers);
1666 this->draggers = NULL;
1668 g_return_if_fail(this->selection != NULL);
1670 for (GSList const* i = this->selection->itemList(); i != NULL; i = i->next) {
1671 SPItem *item = SP_ITEM(i->data);
1672 SPStyle *style = item->style;
1674 if (style && (style->fill.isPaintserver())) {
1675 SPPaintServer *server = style->getFillPaintServer();
1676 if ( server && server->isSolid() ) {
1677 // Suppress "gradientness" of solid paint
1678 } else if ( SP_IS_LINEARGRADIENT(server) ) {
1679 addDraggersLinear( SP_LINEARGRADIENT(server), item, true );
1680 } else if ( SP_IS_RADIALGRADIENT(server) ) {
1681 addDraggersRadial( SP_RADIALGRADIENT(server), item, true );
1682 }
1683 }
1685 if (style && (style->stroke.isPaintserver())) {
1686 SPPaintServer *server = style->getStrokePaintServer();
1687 if ( server && server->isSolid() ) {
1688 // Suppress "gradientness" of solid paint
1689 } else if ( SP_IS_LINEARGRADIENT(server) ) {
1690 addDraggersLinear( SP_LINEARGRADIENT(server), item, false );
1691 } else if ( SP_IS_RADIALGRADIENT(server) ) {
1692 addDraggersRadial( SP_RADIALGRADIENT(server), item, false );
1693 }
1694 }
1695 }
1696 }
1699 /**
1700 * \brief Returns true if at least one of the draggers' knots has the mouse hovering above it
1701 */
1703 bool
1704 GrDrag::mouseOver()
1705 {
1706 for (GList const* i = this->draggers; i != NULL; i = i->next) {
1707 GrDragger *d = (GrDragger *) i->data;
1708 if (d->knot && (d->knot->flags & SP_KNOT_MOUSEOVER)) {
1709 return true;
1710 }
1711 }
1712 return false;
1713 }
1714 /**
1715 Regenerates the lines list from the current selection; is called on each move of a dragger, so that
1716 lines are always in sync with the actual gradient
1717 */
1718 void
1719 GrDrag::updateLines ()
1720 {
1721 // delete old lines
1722 for (GSList const *i = this->lines; i != NULL; i = i->next) {
1723 gtk_object_destroy( GTK_OBJECT (i->data));
1724 }
1725 g_slist_free (this->lines);
1726 this->lines = NULL;
1728 g_return_if_fail (this->selection != NULL);
1730 for (GSList const* i = this->selection->itemList(); i != NULL; i = i->next) {
1732 SPItem *item = SP_ITEM(i->data);
1734 SPStyle *style = SP_OBJECT_STYLE (item);
1736 if (style && (style->fill.isPaintserver())) {
1737 SPPaintServer *server = item->style->getFillPaintServer();
1738 if ( server && server->isSolid() ) {
1739 // Suppress "gradientness" of solid paint
1740 } else if ( SP_IS_LINEARGRADIENT(server) ) {
1741 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);
1742 } else if ( SP_IS_RADIALGRADIENT(server) ) {
1743 Geom::Point center = sp_item_gradient_get_coords (item, POINT_RG_CENTER, 0, true);
1744 this->addLine (item, center, sp_item_gradient_get_coords (item, POINT_RG_R1, 0, true), GR_LINE_COLOR_FILL);
1745 this->addLine (item, center, sp_item_gradient_get_coords (item, POINT_RG_R2, 0, true), GR_LINE_COLOR_FILL);
1746 }
1747 }
1749 if (style && (style->stroke.isPaintserver())) {
1750 SPPaintServer *server = item->style->getStrokePaintServer();
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, false), sp_item_gradient_get_coords (item, POINT_LG_END, 0, false), GR_LINE_COLOR_STROKE);
1755 } else if ( SP_IS_RADIALGRADIENT(server) ) {
1756 Geom::Point center = sp_item_gradient_get_coords (item, POINT_RG_CENTER, 0, false);
1757 this->addLine (item, center, sp_item_gradient_get_coords (item, POINT_RG_R1, 0, false), GR_LINE_COLOR_STROKE);
1758 this->addLine (item, center, sp_item_gradient_get_coords (item, POINT_RG_R2, 0, false), GR_LINE_COLOR_STROKE);
1759 }
1760 }
1761 }
1762 }
1764 /**
1765 Regenerates the levels list from the current selection
1766 */
1767 void
1768 GrDrag::updateLevels ()
1769 {
1770 hor_levels.clear();
1771 vert_levels.clear();
1773 g_return_if_fail (this->selection != NULL);
1775 for (GSList const* i = this->selection->itemList(); i != NULL; i = i->next) {
1776 SPItem *item = SP_ITEM(i->data);
1777 Geom::OptRect rect = sp_item_bbox_desktop (item);
1778 if (rect) {
1779 // Remember the edges of the bbox and the center axis
1780 hor_levels.push_back(rect->min()[Geom::Y]);
1781 hor_levels.push_back(rect->max()[Geom::Y]);
1782 hor_levels.push_back(0.5 * (rect->min()[Geom::Y] + rect->max()[Geom::Y]));
1783 vert_levels.push_back(rect->min()[Geom::X]);
1784 vert_levels.push_back(rect->max()[Geom::X]);
1785 vert_levels.push_back(0.5 * (rect->min()[Geom::X] + rect->max()[Geom::X]));
1786 }
1787 }
1788 }
1790 void
1791 GrDrag::selected_reverse_vector ()
1792 {
1793 if (selected == NULL)
1794 return;
1796 for (GSList const* i = ( (GrDragger*) selected->data )->draggables; i != NULL; i = i->next) {
1797 GrDraggable *draggable = (GrDraggable *) i->data;
1799 sp_item_gradient_reverse_vector (draggable->item, draggable->fill_or_stroke);
1800 }
1801 }
1803 void
1804 GrDrag::selected_move_nowrite (double x, double y, bool scale_radial)
1805 {
1806 selected_move (x, y, false, scale_radial);
1807 }
1809 void
1810 GrDrag::selected_move (double x, double y, bool write_repr, bool scale_radial)
1811 {
1812 if (selected == NULL)
1813 return;
1815 bool did = false;
1817 for (GList *i = selected; i != NULL; i = i->next) {
1818 GrDragger *d = (GrDragger *) i->data;
1820 if (!d->isA(POINT_LG_MID) && !d->isA(POINT_RG_MID1) && !d->isA(POINT_RG_MID2)) {
1821 // if this is an endpoint,
1823 // Moving an rg center moves its focus and radii as well.
1824 // therefore, if this is a focus or radius and if selection
1825 // contains the center as well, do not move this one
1826 if (d->isA(POINT_RG_R1) || d->isA(POINT_RG_R2) ||
1827 (d->isA(POINT_RG_FOCUS) && !d->isA(POINT_RG_CENTER))) {
1828 bool skip_radius_with_center = false;
1829 for (GList *di = selected; di != NULL; di = di->next) {
1830 GrDragger *d_new = (GrDragger *) di->data;
1831 if (d_new->isA (((GrDraggable *) d->draggables->data)->item,
1832 POINT_RG_CENTER,
1833 0,
1834 ((GrDraggable *) d->draggables->data)->fill_or_stroke)) {
1835 // FIXME: here we take into account only the first draggable!
1836 skip_radius_with_center = true;
1837 }
1838 }
1839 if (skip_radius_with_center)
1840 continue;
1841 }
1843 did = true;
1844 d->point += Geom::Point (x, y);
1845 d->point_original = d->point;
1846 sp_knot_moveto (d->knot, d->point);
1848 d->fireDraggables (write_repr, scale_radial);
1850 d->updateDependencies(write_repr);
1851 }
1852 }
1854 if (write_repr && did) {
1855 // we did an undoable action
1856 sp_document_maybe_done (sp_desktop_document (desktop), "grmoveh", SP_VERB_CONTEXT_GRADIENT,
1857 _("Move gradient handle(s)"));
1858 return;
1859 }
1861 if (!did) { // none of the end draggers are selected, so let's try to move the mids
1863 GrDragger *dragger = (GrDragger *) selected->data;
1864 // a midpoint dragger can (logically) only contain one GrDraggable
1865 GrDraggable *draggable = (GrDraggable *) dragger->draggables->data;
1867 Geom::Point begin(0,0), end(0,0);
1868 Geom::Point low_lim(0,0), high_lim(0,0);
1870 SPObject *server = draggable->getServer();
1871 GSList *moving = NULL;
1872 gr_midpoint_limits(dragger, server, &begin, &end, &low_lim, &high_lim, &moving);
1874 Geom::Point p(x, y);
1875 p = snap_vector_midpoint (dragger->point + p, low_lim, high_lim, 0);
1876 Geom::Point displacement = p - dragger->point;
1878 for (GSList const* i = moving; i != NULL; i = i->next) {
1879 GrDragger *drg = (GrDragger*) i->data;
1880 SPKnot *drgknot = drg->knot;
1881 drg->point += displacement;
1882 sp_knot_moveto (drgknot, drg->point);
1883 drg->fireDraggables (true);
1884 drg->updateDependencies(true);
1885 did = true;
1886 }
1888 g_slist_free(moving);
1890 if (write_repr && did) {
1891 // we did an undoable action
1892 sp_document_maybe_done (sp_desktop_document (desktop), "grmovem", SP_VERB_CONTEXT_GRADIENT,
1893 _("Move gradient mid stop(s)"));
1894 }
1895 }
1896 }
1898 void
1899 GrDrag::selected_move_screen (double x, double y)
1900 {
1901 gdouble zoom = desktop->current_zoom();
1902 gdouble zx = x / zoom;
1903 gdouble zy = y / zoom;
1905 selected_move (zx, zy);
1906 }
1908 /**
1909 Select the knot next to the last selected one and deselect all other selected.
1910 */
1911 GrDragger *
1912 GrDrag::select_next ()
1913 {
1914 GrDragger *d = NULL;
1915 if (selected == NULL || g_list_find(draggers, selected->data)->next == NULL) {
1916 if (draggers)
1917 d = (GrDragger *) draggers->data;
1918 } else {
1919 d = (GrDragger *) g_list_find(draggers, selected->data)->next->data;
1920 }
1921 if (d)
1922 setSelected (d);
1923 return d;
1924 }
1926 /**
1927 Select the knot previous from the last selected one and deselect all other selected.
1928 */
1929 GrDragger *
1930 GrDrag::select_prev ()
1931 {
1932 GrDragger *d = NULL;
1933 if (selected == NULL || g_list_find(draggers, selected->data)->prev == NULL) {
1934 if (draggers)
1935 d = (GrDragger *) g_list_last (draggers)->data;
1936 } else {
1937 d = (GrDragger *) g_list_find(draggers, selected->data)->prev->data;
1938 }
1939 if (d)
1940 setSelected (d);
1941 return d;
1942 }
1945 // FIXME: i.m.o. an ugly function that I just made to work, but... aargh! (Johan)
1946 void
1947 GrDrag::deleteSelected (bool just_one)
1948 {
1949 if (!selected) return;
1951 SPDocument *document = false;
1953 struct StructStopInfo {
1954 SPStop * spstop;
1955 GrDraggable * draggable;
1956 SPGradient * gradient;
1957 SPGradient * vector;
1958 };
1960 GSList *midstoplist = NULL; // list of stops that must be deleted (will be deleted first)
1961 GSList *endstoplist = NULL; // list of stops that must be deleted
1962 while (selected) {
1963 GrDragger *dragger = (GrDragger*) selected->data;
1964 for (GSList * drgble = dragger->draggables; drgble != NULL; drgble = drgble->next) {
1965 GrDraggable *draggable = (GrDraggable*) drgble->data;
1966 SPGradient *gradient = sp_item_gradient (draggable->item, draggable->fill_or_stroke);
1967 SPGradient *vector = sp_gradient_get_forked_vector_if_necessary (gradient, false);
1969 switch (draggable->point_type) {
1970 case POINT_LG_MID:
1971 case POINT_RG_MID1:
1972 case POINT_RG_MID2:
1973 {
1974 SPStop *stop = sp_get_stop_i(vector, draggable->point_i);
1975 // check if already present in list. (e.g. when both RG_MID1 and RG_MID2 were selected)
1976 bool present = false;
1977 for (GSList const * l = midstoplist; l != NULL; l = l->next) {
1978 if ( (SPStop*)l->data == stop ) {
1979 present = true;
1980 break; // no need to search further.
1981 }
1982 }
1983 if (!present)
1984 midstoplist = g_slist_append(midstoplist, stop);
1985 }
1986 break;
1987 case POINT_LG_BEGIN:
1988 case POINT_LG_END:
1989 case POINT_RG_CENTER:
1990 case POINT_RG_R1:
1991 case POINT_RG_R2:
1992 {
1993 SPStop *stop = NULL;
1994 if ( (draggable->point_type == POINT_LG_BEGIN) || (draggable->point_type == POINT_RG_CENTER) ) {
1995 stop = vector->getFirstStop();
1996 } else {
1997 stop = sp_last_stop(vector);
1998 }
1999 if (stop) {
2000 StructStopInfo *stopinfo = new StructStopInfo;
2001 stopinfo->spstop = stop;
2002 stopinfo->draggable = draggable;
2003 stopinfo->gradient = gradient;
2004 stopinfo->vector = vector;
2005 // check if already present in list. (e.g. when both R1 and R2 were selected)
2006 bool present = false;
2007 for (GSList const * l = endstoplist; l != NULL; l = l->next) {
2008 if ( ((StructStopInfo*)l->data)->spstop == stopinfo->spstop ) {
2009 present = true;
2010 break; // no need to search further.
2011 }
2012 }
2013 if (!present)
2014 endstoplist = g_slist_append(endstoplist, stopinfo);
2015 }
2016 }
2017 break;
2018 default:
2019 break;
2020 }
2021 }
2022 selected = g_list_remove(selected, dragger);
2023 if ( just_one ) break; // iterate once if just_one is set.
2024 }
2025 while (midstoplist) {
2026 SPStop *stop = (SPStop*) midstoplist->data;
2027 document = SP_OBJECT_DOCUMENT (stop);
2028 Inkscape::XML::Node * parent = SP_OBJECT_REPR(stop)->parent();
2029 parent->removeChild(SP_OBJECT_REPR(stop));
2030 midstoplist = g_slist_remove(midstoplist, stop);
2031 }
2032 while (endstoplist) {
2033 StructStopInfo *stopinfo = (StructStopInfo*) endstoplist->data;
2034 document = SP_OBJECT_DOCUMENT (stopinfo->spstop);
2036 // 2 is the minimum, cannot delete more than that without deleting the whole vector
2037 // cannot use vector->vector.stops.size() because the vector might be invalidated by deletion of a midstop
2038 // manually count the children, don't know if there already exists a function for this...
2039 int len = 0;
2040 for ( SPObject *child = sp_object_first_child(stopinfo->vector) ;
2041 child != NULL ;
2042 child = SP_OBJECT_NEXT(child) )
2043 {
2044 if ( SP_IS_STOP(child) ) len ++;
2045 }
2046 if (len > 2)
2047 {
2048 switch (stopinfo->draggable->point_type) {
2049 case POINT_LG_BEGIN:
2050 {
2051 SP_OBJECT_REPR(stopinfo->vector)->removeChild(SP_OBJECT_REPR(stopinfo->spstop));
2053 SPLinearGradient *lg = SP_LINEARGRADIENT(stopinfo->gradient);
2054 Geom::Point oldbegin = Geom::Point (lg->x1.computed, lg->y1.computed);
2055 Geom::Point end = Geom::Point (lg->x2.computed, lg->y2.computed);
2056 SPStop *stop = stopinfo->vector->getFirstStop();
2057 gdouble offset = stop->offset;
2058 Geom::Point newbegin = oldbegin + offset * (end - oldbegin);
2059 lg->x1.computed = newbegin[Geom::X];
2060 lg->y1.computed = newbegin[Geom::Y];
2062 Inkscape::XML::Node *repr = SP_OBJECT_REPR(stopinfo->gradient);
2063 sp_repr_set_svg_double(repr, "x1", lg->x1.computed);
2064 sp_repr_set_svg_double(repr, "y1", lg->y1.computed);
2065 stop->offset = 0;
2066 sp_repr_set_css_double (SP_OBJECT_REPR (stop), "offset", 0);
2068 // iterate through midstops to set new offset values such that they won't move on canvas.
2069 SPStop *laststop = sp_last_stop(stopinfo->vector);
2070 stop = stop->getNextStop();
2071 while ( stop != laststop ) {
2072 stop->offset = (stop->offset - offset)/(1 - offset);
2073 sp_repr_set_css_double (SP_OBJECT_REPR (stop), "offset", stop->offset);
2074 stop = stop->getNextStop();
2075 }
2076 }
2077 break;
2078 case POINT_LG_END:
2079 {
2080 SP_OBJECT_REPR(stopinfo->vector)->removeChild(SP_OBJECT_REPR(stopinfo->spstop));
2082 SPLinearGradient *lg = SP_LINEARGRADIENT(stopinfo->gradient);
2083 Geom::Point begin = Geom::Point (lg->x1.computed, lg->y1.computed);
2084 Geom::Point oldend = Geom::Point (lg->x2.computed, lg->y2.computed);
2085 SPStop *laststop = sp_last_stop(stopinfo->vector);
2086 gdouble offset = laststop->offset;
2087 Geom::Point newend = begin + offset * (oldend - begin);
2088 lg->x2.computed = newend[Geom::X];
2089 lg->y2.computed = newend[Geom::Y];
2091 Inkscape::XML::Node *repr = SP_OBJECT_REPR(stopinfo->gradient);
2092 sp_repr_set_svg_double(repr, "x2", lg->x2.computed);
2093 sp_repr_set_svg_double(repr, "y2", lg->y2.computed);
2094 laststop->offset = 1;
2095 sp_repr_set_css_double (SP_OBJECT_REPR (laststop), "offset", 1);
2097 // iterate through midstops to set new offset values such that they won't move on canvas.
2098 SPStop *stop = stopinfo->vector->getFirstStop();
2099 stop = stop->getNextStop();
2100 while ( stop != laststop ) {
2101 stop->offset = stop->offset / offset;
2102 sp_repr_set_css_double (SP_OBJECT_REPR (stop), "offset", stop->offset);
2103 stop = stop->getNextStop();
2104 }
2105 }
2106 break;
2107 case POINT_RG_CENTER:
2108 {
2109 SPStop *newfirst = stopinfo->spstop->getNextStop();
2110 if (newfirst) {
2111 newfirst->offset = 0;
2112 sp_repr_set_css_double (SP_OBJECT_REPR (newfirst), "offset", 0);
2113 }
2114 SP_OBJECT_REPR(stopinfo->vector)->removeChild(SP_OBJECT_REPR(stopinfo->spstop));
2115 }
2116 break;
2117 case POINT_RG_R1:
2118 case POINT_RG_R2:
2119 SP_OBJECT_REPR(stopinfo->vector)->removeChild(SP_OBJECT_REPR(stopinfo->spstop));
2121 SPRadialGradient *rg = SP_RADIALGRADIENT(stopinfo->gradient);
2122 double oldradius = rg->r.computed;
2123 SPStop *laststop = sp_last_stop(stopinfo->vector);
2124 gdouble offset = laststop->offset;
2125 double newradius = offset * oldradius;
2126 rg->r.computed = newradius;
2128 Inkscape::XML::Node *repr = SP_OBJECT_REPR(rg);
2129 sp_repr_set_svg_double(repr, "r", rg->r.computed);
2130 laststop->offset = 1;
2131 sp_repr_set_css_double (SP_OBJECT_REPR (laststop), "offset", 1);
2133 // iterate through midstops to set new offset values such that they won't move on canvas.
2134 SPStop *stop = stopinfo->vector->getFirstStop();
2135 stop = stop->getNextStop();
2136 while ( stop != laststop ) {
2137 stop->offset = stop->offset / offset;
2138 sp_repr_set_css_double (SP_OBJECT_REPR (stop), "offset", stop->offset);
2139 stop = stop->getNextStop();
2140 }
2141 break;
2142 }
2143 }
2144 else
2145 { // delete the gradient from the object. set fill to unset FIXME: set to fill of unselected node?
2146 SPCSSAttr *css = sp_repr_css_attr_new ();
2148 // stopinfo->spstop is the selected stop
2149 Inkscape::XML::Node *unselectedrepr = SP_OBJECT_REPR(stopinfo->vector)->firstChild();
2150 if (unselectedrepr == SP_OBJECT_REPR(stopinfo->spstop) ) {
2151 unselectedrepr = unselectedrepr->next();
2152 }
2154 if (unselectedrepr == NULL) {
2155 if (stopinfo->draggable->fill_or_stroke) {
2156 sp_repr_css_unset_property (css, "fill");
2157 } else {
2158 sp_repr_css_unset_property (css, "stroke");
2159 }
2160 } else {
2161 SPCSSAttr *stopcss = sp_repr_css_attr(unselectedrepr, "style");
2162 if (stopinfo->draggable->fill_or_stroke) {
2163 sp_repr_css_set_property(css, "fill", sp_repr_css_property(stopcss, "stop-color", "inkscape:unset"));
2164 sp_repr_css_set_property(css, "fill-opacity", sp_repr_css_property(stopcss, "stop-opacity", "1"));
2165 } else {
2166 sp_repr_css_set_property(css, "stroke", sp_repr_css_property(stopcss, "stop-color", "inkscape:unset"));
2167 sp_repr_css_set_property(css, "stroke-opacity", sp_repr_css_property(stopcss, "stop-opacity", "1"));
2168 }
2169 sp_repr_css_attr_unref (stopcss);
2170 }
2172 sp_repr_css_change (SP_OBJECT_REPR (stopinfo->draggable->item), css, "style");
2173 sp_repr_css_attr_unref (css);
2174 }
2176 endstoplist = g_slist_remove(endstoplist, stopinfo);
2177 delete stopinfo;
2178 }
2180 if (document) {
2181 sp_document_done ( document, SP_VERB_CONTEXT_GRADIENT, _("Delete gradient stop(s)") );
2182 }
2183 }
2186 /*
2187 Local Variables:
2188 mode:c++
2189 c-file-style:"stroustrup"
2190 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
2191 indent-tabs-mode:nil
2192 fill-column:99
2193 End:
2194 */
2195 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4 :