b507ab72b51e1b477b725a834d52e0f572f5ca5a
1 #define __GRADIENT_DRAG_C__
3 /*
4 * On-canvas gradient dragging
5 *
6 * Authors:
7 * bulia byak <buliabyak@users.sf.net>
8 * Johan Engelen <j.b.c.engelen@ewi.utwente.nl>
9 *
10 * Copyright (C) 2007 Johan Engelen
11 * Copyright (C) 2005 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 #define GR_KNOT_COLOR_NORMAL 0xffffff00
49 #define GR_KNOT_COLOR_MOUSEOVER 0xff000000
50 #define GR_KNOT_COLOR_SELECTED 0x0000ff00
52 #define GR_LINE_COLOR_FILL 0x0000ff7f
53 #define GR_LINE_COLOR_STROKE 0x9999007f
55 // screen pixels between knots when they snap:
56 #define SNAP_DIST 5
58 // absolute distance between gradient points for them to become a single dragger when the drag is created:
59 #define MERGE_DIST 0.1
61 // knot shapes corresponding to GrPointType enum
62 SPKnotShapeType gr_knot_shapes [] = {
63 SP_KNOT_SHAPE_SQUARE, //POINT_LG_BEGIN
64 SP_KNOT_SHAPE_CIRCLE, //POINT_LG_END
65 SP_KNOT_SHAPE_DIAMOND, //POINT_LG_MID
66 SP_KNOT_SHAPE_SQUARE, // POINT_RG_CENTER
67 SP_KNOT_SHAPE_CIRCLE, // POINT_RG_R1
68 SP_KNOT_SHAPE_CIRCLE, // POINT_RG_R2
69 SP_KNOT_SHAPE_CROSS, // POINT_RG_FOCUS
70 SP_KNOT_SHAPE_DIAMOND, //POINT_RG_MID1
71 SP_KNOT_SHAPE_DIAMOND //POINT_RG_MID2
72 };
74 const gchar *gr_knot_descr [] = {
75 N_("Linear gradient <b>start</b>"), //POINT_LG_BEGIN
76 N_("Linear gradient <b>end</b>"),
77 N_("Linear gradient <b>mid stop</b>"),
78 N_("Radial gradient <b>center</b>"),
79 N_("Radial gradient <b>radius</b>"),
80 N_("Radial gradient <b>radius</b>"),
81 N_("Radial gradient <b>focus</b>"), // POINT_RG_FOCUS
82 N_("Radial gradient <b>mid stop</b>"),
83 N_("Radial gradient <b>mid stop</b>")
84 };
86 static void
87 gr_drag_sel_changed(Inkscape::Selection */*selection*/, gpointer data)
88 {
89 GrDrag *drag = (GrDrag *) data;
90 drag->updateDraggers ();
91 drag->updateLines ();
92 drag->updateLevels ();
93 }
95 static void
96 gr_drag_sel_modified (Inkscape::Selection */*selection*/, guint /*flags*/, gpointer data)
97 {
98 GrDrag *drag = (GrDrag *) data;
99 if (drag->local_change) {
100 drag->local_change = false;
101 } else {
102 drag->updateDraggers ();
103 }
104 drag->updateLines ();
105 drag->updateLevels ();
106 }
108 /**
109 When a _query_style_signal is received, check that \a property requests fill/stroke/opacity (otherwise
110 skip), and fill the \a style with the averaged color of all draggables of the selected dragger, if
111 any.
112 */
113 int
114 gr_drag_style_query (SPStyle *style, int property, gpointer data)
115 {
116 GrDrag *drag = (GrDrag *) data;
118 if (property != QUERY_STYLE_PROPERTY_FILL && property != QUERY_STYLE_PROPERTY_STROKE && property != QUERY_STYLE_PROPERTY_MASTEROPACITY) {
119 return QUERY_STYLE_NOTHING;
120 }
122 if (!drag->selected) {
123 return QUERY_STYLE_NOTHING;
124 } else {
125 int ret = QUERY_STYLE_NOTHING;
127 float cf[4];
128 cf[0] = cf[1] = cf[2] = cf[3] = 0;
130 int count = 0;
132 for (GList *i = drag->selected; i != NULL; i = i->next) { // for all selected draggers
133 GrDragger *d = (GrDragger *) i->data;
134 for (GSList const* j = d->draggables; j != NULL; j = j->next) { // for all draggables of dragger
135 GrDraggable *draggable = (GrDraggable *) j->data;
137 if (ret == QUERY_STYLE_NOTHING) {
138 ret = QUERY_STYLE_SINGLE;
139 } else if (ret == QUERY_STYLE_SINGLE) {
140 ret = QUERY_STYLE_MULTIPLE_AVERAGED;
141 }
143 guint32 c = sp_item_gradient_stop_query_style (draggable->item, draggable->point_type, draggable->point_i, draggable->fill_or_stroke);
144 cf[0] += SP_RGBA32_R_F (c);
145 cf[1] += SP_RGBA32_G_F (c);
146 cf[2] += SP_RGBA32_B_F (c);
147 cf[3] += SP_RGBA32_A_F (c);
149 count ++;
150 }
151 }
153 if (count) {
154 cf[0] /= count;
155 cf[1] /= count;
156 cf[2] /= count;
157 cf[3] /= count;
159 // set both fill and stroke with our stop-color and stop-opacity
160 style->fill.clear();
161 style->fill.setColor( cf[0], cf[1], cf[2] );
162 style->fill.set = TRUE;
163 style->stroke.clear();
164 style->stroke.setColor( cf[0], cf[1], cf[2] );
165 style->stroke.set = TRUE;
167 style->fill_opacity.value = SP_SCALE24_FROM_FLOAT (1.0);
168 style->fill_opacity.set = TRUE;
169 style->stroke_opacity.value = SP_SCALE24_FROM_FLOAT (1.0);
170 style->stroke_opacity.set = TRUE;
172 style->opacity.value = SP_SCALE24_FROM_FLOAT (cf[3]);
173 style->opacity.set = TRUE;
174 }
176 return ret;
177 }
178 }
180 bool
181 gr_drag_style_set (const SPCSSAttr *css, gpointer data)
182 {
183 GrDrag *drag = (GrDrag *) data;
185 if (!drag->selected)
186 return false;
188 SPCSSAttr *stop = sp_repr_css_attr_new ();
190 // See if the css contains interesting properties, and if so, translate them into the format
191 // acceptable for gradient stops
193 // any of color properties, in order of increasing priority:
194 if (css->attribute("flood-color"))
195 sp_repr_css_set_property (stop, "stop-color", css->attribute("flood-color"));
197 if (css->attribute("lighting-color"))
198 sp_repr_css_set_property (stop, "stop-color", css->attribute("lighting-color"));
200 if (css->attribute("color"))
201 sp_repr_css_set_property (stop, "stop-color", css->attribute("color"));
203 if (css->attribute("stroke") && strcmp(css->attribute("stroke"), "none"))
204 sp_repr_css_set_property (stop, "stop-color", css->attribute("stroke"));
206 if (css->attribute("fill") && strcmp(css->attribute("fill"), "none"))
207 sp_repr_css_set_property (stop, "stop-color", css->attribute("fill"));
209 if (css->attribute("stop-color"))
210 sp_repr_css_set_property (stop, "stop-color", css->attribute("stop-color"));
213 if (css->attribute("stop-opacity")) { // direct setting of stop-opacity has priority
214 sp_repr_css_set_property (stop, "stop-opacity", css->attribute("stop-opacity"));
215 } else { // multiply all opacity properties:
216 gdouble accumulated = 1.0;
217 accumulated *= sp_svg_read_percentage(css->attribute("flood-opacity"), 1.0);
218 accumulated *= sp_svg_read_percentage(css->attribute("opacity"), 1.0);
219 accumulated *= sp_svg_read_percentage(css->attribute("stroke-opacity"), 1.0);
220 accumulated *= sp_svg_read_percentage(css->attribute("fill-opacity"), 1.0);
222 Inkscape::CSSOStringStream os;
223 os << accumulated;
224 sp_repr_css_set_property (stop, "stop-opacity", os.str().c_str());
226 if ((css->attribute("fill") && !css->attribute("stroke") && !strcmp(css->attribute("fill"), "none")) ||
227 (css->attribute("stroke") && !css->attribute("fill") && !strcmp(css->attribute("stroke"), "none")))
228 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
229 }
231 if (!stop->attributeList()) { // nothing for us here, pass it on
232 sp_repr_css_attr_unref(stop);
233 return false;
234 }
236 for (GList const* sel = drag->selected; sel != NULL; sel = sel->next) { // for all selected draggers
237 GrDragger* dragger = (GrDragger*) sel->data;
238 for (GSList const* i = dragger->draggables; i != NULL; i = i->next) { // for all draggables of dragger
239 GrDraggable *draggable = (GrDraggable *) i->data;
241 drag->local_change = true;
242 sp_item_gradient_stop_set_style (draggable->item, draggable->point_type, draggable->point_i, draggable->fill_or_stroke, stop);
243 }
244 }
246 //sp_repr_css_print(stop);
247 sp_repr_css_attr_unref(stop);
248 return true;
249 }
251 guint32 GrDrag::getColor()
252 {
253 if (!selected) return 0;
255 float cf[4];
256 cf[0] = cf[1] = cf[2] = cf[3] = 0;
258 int count = 0;
260 for (GList *i = selected; i != NULL; i = i->next) { // for all selected draggers
261 GrDragger *d = (GrDragger *) i->data;
262 for (GSList const* j = d->draggables; j != NULL; j = j->next) { // for all draggables of dragger
263 GrDraggable *draggable = (GrDraggable *) j->data;
265 guint32 c = sp_item_gradient_stop_query_style (draggable->item, draggable->point_type, draggable->point_i, draggable->fill_or_stroke);
266 cf[0] += SP_RGBA32_R_F (c);
267 cf[1] += SP_RGBA32_G_F (c);
268 cf[2] += SP_RGBA32_B_F (c);
269 cf[3] += SP_RGBA32_A_F (c);
271 count ++;
272 }
273 }
275 if (count) {
276 cf[0] /= count;
277 cf[1] /= count;
278 cf[2] /= count;
279 cf[3] /= count;
280 }
282 return SP_RGBA32_F_COMPOSE(cf[0], cf[1], cf[2], cf[3]);
283 }
285 SPStop *
286 GrDrag::addStopNearPoint (SPItem *item, NR::Point mouse_p, double tolerance)
287 {
288 gfloat offset; // type of SPStop.offset = gfloat
289 SPGradient *gradient;
290 bool fill_or_stroke = true;
291 bool r1_knot = false;
293 bool addknot = false;
294 do {
295 gradient = sp_item_gradient (item, fill_or_stroke);
296 if (SP_IS_LINEARGRADIENT(gradient)) {
297 NR::Point begin = sp_item_gradient_get_coords(item, POINT_LG_BEGIN, 0, fill_or_stroke);
298 NR::Point end = sp_item_gradient_get_coords(item, POINT_LG_END, 0, fill_or_stroke);
300 NR::Point nearest = snap_vector_midpoint (mouse_p, begin, end, 0);
301 double dist_screen = NR::L2 (mouse_p - nearest);
302 if ( dist_screen < tolerance ) {
303 // add the knot
304 offset = get_offset_between_points(nearest, begin, end);
305 addknot = true;
306 break; // break out of the while loop: add only one knot
307 }
308 } else if (SP_IS_RADIALGRADIENT(gradient)) {
309 NR::Point begin = sp_item_gradient_get_coords(item, POINT_RG_CENTER, 0, fill_or_stroke);
310 NR::Point end = sp_item_gradient_get_coords(item, POINT_RG_R1, 0, fill_or_stroke);
311 NR::Point nearest = snap_vector_midpoint (mouse_p, begin, end, 0);
312 double dist_screen = NR::L2 (mouse_p - nearest);
313 if ( dist_screen < tolerance ) {
314 offset = get_offset_between_points(nearest, begin, end);
315 addknot = true;
316 r1_knot = true;
317 break; // break out of the while loop: add only one knot
318 }
320 end = sp_item_gradient_get_coords(item, POINT_RG_R2, 0, fill_or_stroke);
321 nearest = snap_vector_midpoint (mouse_p, begin, end, 0);
322 dist_screen = NR::L2 (mouse_p - nearest);
323 if ( dist_screen < tolerance ) {
324 offset = get_offset_between_points(nearest, begin, end);
325 addknot = true;
326 r1_knot = false;
327 break; // break out of the while loop: add only one knot
328 }
329 }
330 fill_or_stroke = !fill_or_stroke;
331 } while (!fill_or_stroke && !addknot) ;
333 if (addknot) {
334 SPGradient *vector = sp_gradient_get_forked_vector_if_necessary (gradient, false);
335 SPStop* prev_stop = sp_first_stop(vector);
336 SPStop* next_stop = sp_next_stop(prev_stop);
337 guint i = 1;
338 while ( (next_stop) && (next_stop->offset < offset) ) {
339 prev_stop = next_stop;
340 next_stop = sp_next_stop(next_stop);
341 i++;
342 }
343 if (!next_stop) {
344 // logical error: the endstop should have offset 1 and should always be more than this offset here
345 return NULL;
346 }
349 SPStop *newstop = sp_vector_add_stop (vector, prev_stop, next_stop, offset);
350 sp_gradient_ensure_vector (gradient);
351 updateDraggers();
353 return newstop;
354 }
356 return NULL;
357 }
360 bool
361 GrDrag::dropColor(SPItem */*item*/, gchar *c, NR::Point p)
362 {
363 // first, see if we can drop onto one of the existing draggers
364 for (GList *i = draggers; i != NULL; i = i->next) { // for all draggables of dragger
365 GrDragger *d = (GrDragger *) i->data;
367 if (NR::L2(p - d->point)*desktop->current_zoom() < 5) {
368 SPCSSAttr *stop = sp_repr_css_attr_new ();
369 sp_repr_css_set_property (stop, "stop-color", c);
370 sp_repr_css_set_property (stop, "stop-opacity", "1");
371 for (GSList *j = d->draggables; j != NULL; j = j->next) { // for all draggables of dragger
372 GrDraggable *draggable = (GrDraggable *) j->data;
373 local_change = true;
374 sp_item_gradient_stop_set_style (draggable->item, draggable->point_type, draggable->point_i, draggable->fill_or_stroke, stop);
375 }
376 sp_repr_css_attr_unref(stop);
377 return true;
378 }
379 }
381 // now see if we're over line and create a new stop
382 bool over_line = false;
383 SPCtrlLine *line = NULL;
384 if (lines) {
385 for (GSList *l = lines; (l != NULL) && (!over_line); l = l->next) {
386 line = (SPCtrlLine*) l->data;
387 NR::Point nearest = snap_vector_midpoint (p, line->s, line->e, 0);
388 double dist_screen = NR::L2 (p - nearest) * desktop->current_zoom();
389 if (line->item && dist_screen < 5) {
390 SPStop *stop = addStopNearPoint (line->item, p, 5/desktop->current_zoom());
391 if (stop) {
392 SPCSSAttr *css = sp_repr_css_attr_new ();
393 sp_repr_css_set_property (css, "stop-color", c);
394 sp_repr_css_set_property (css, "stop-opacity", "1");
395 sp_repr_css_change (SP_OBJECT_REPR (stop), css, "style");
396 return true;
397 }
398 }
399 }
400 }
402 return false;
403 }
406 GrDrag::GrDrag(SPDesktop *desktop) {
408 this->desktop = desktop;
410 this->selection = sp_desktop_selection(desktop);
412 this->draggers = NULL;
413 this->lines = NULL;
414 this->selected = NULL;
416 this->hor_levels.clear();
417 this->vert_levels.clear();
419 this->local_change = false;
421 this->sel_changed_connection = this->selection->connectChanged(
422 sigc::bind (
423 sigc::ptr_fun(&gr_drag_sel_changed),
424 (gpointer)this )
426 );
427 this->sel_modified_connection = this->selection->connectModified(
428 sigc::bind(
429 sigc::ptr_fun(&gr_drag_sel_modified),
430 (gpointer)this )
431 );
433 this->style_set_connection = this->desktop->connectSetStyle(
434 sigc::bind(
435 sigc::ptr_fun(&gr_drag_style_set),
436 (gpointer)this )
437 );
439 this->style_query_connection = this->desktop->connectQueryStyle(
440 sigc::bind(
441 sigc::ptr_fun(&gr_drag_style_query),
442 (gpointer)this )
443 );
445 this->updateDraggers ();
446 this->updateLines ();
447 this->updateLevels ();
449 if (desktop->gr_item) {
450 this->setSelected (getDraggerFor (desktop->gr_item, desktop->gr_point_type, desktop->gr_point_i, desktop->gr_fill_or_stroke));
451 }
452 }
454 GrDrag::~GrDrag()
455 {
456 this->sel_changed_connection.disconnect();
457 this->sel_modified_connection.disconnect();
458 this->style_set_connection.disconnect();
459 this->style_query_connection.disconnect();
461 if (this->selected) {
462 GrDraggable *draggable = (GrDraggable *) ((GrDragger*)this->selected->data)->draggables->data;
463 desktop->gr_item = draggable->item;
464 desktop->gr_point_type = draggable->point_type;
465 desktop->gr_point_i = draggable->point_i;
466 desktop->gr_fill_or_stroke = draggable->fill_or_stroke;
467 } else {
468 desktop->gr_item = NULL;
469 desktop->gr_point_type = 0;
470 desktop->gr_point_i = 0;
471 desktop->gr_fill_or_stroke = true;
472 }
474 deselect_all();
475 for (GList *l = this->draggers; l != NULL; l = l->next) {
476 delete ((GrDragger *) l->data);
477 }
478 g_list_free (this->draggers);
479 this->draggers = NULL;
480 this->selected = NULL;
482 for (GSList *l = this->lines; l != NULL; l = l->next) {
483 gtk_object_destroy( GTK_OBJECT (l->data));
484 }
485 g_slist_free (this->lines);
486 this->lines = NULL;
487 }
489 GrDraggable::GrDraggable (SPItem *item, guint point_type, guint point_i, bool fill_or_stroke)
490 {
491 this->item = item;
492 this->point_type = point_type;
493 this->point_i = point_i;
494 this->fill_or_stroke = fill_or_stroke;
496 g_object_ref (G_OBJECT (this->item));
497 }
499 GrDraggable::~GrDraggable ()
500 {
501 g_object_unref (G_OBJECT (this->item));
502 }
505 SPObject *
506 GrDraggable::getServer ()
507 {
508 if (!item)
509 return NULL;
511 SPObject *server = NULL;
512 if (fill_or_stroke)
513 server = SP_OBJECT_STYLE_FILL_SERVER (item);
514 else
515 server = SP_OBJECT_STYLE_STROKE_SERVER (item);
517 return server;
518 }
520 static void
521 gr_knot_moved_handler(SPKnot *knot, NR::Point const *ppointer, guint state, gpointer data)
522 {
523 GrDragger *dragger = (GrDragger *) data;
524 GrDrag *drag = dragger->parent;
526 NR::Point p = *ppointer;
528 // FIXME: take from prefs
529 double snap_dist = SNAP_DIST / dragger->parent->desktop->current_zoom();
531 if (state & GDK_SHIFT_MASK) {
532 // with Shift; unsnap if we carry more than one draggable
533 if (dragger->draggables && dragger->draggables->next) {
534 // create a new dragger
535 GrDragger *dr_new = new GrDragger (dragger->parent, dragger->point, NULL);
536 dragger->parent->draggers = g_list_prepend (dragger->parent->draggers, dr_new);
537 // relink to it all but the first draggable in the list
538 for (GSList const* i = dragger->draggables->next; i != NULL; i = i->next) {
539 GrDraggable *draggable = (GrDraggable *) i->data;
540 dr_new->addDraggable (draggable);
541 }
542 dr_new->updateKnotShape();
543 g_slist_free (dragger->draggables->next);
544 dragger->draggables->next = NULL;
545 dragger->updateKnotShape();
546 dragger->updateTip();
547 }
548 } else if (!(state & GDK_CONTROL_MASK)) {
549 // without Shift or Ctrl; see if we need to snap to another dragger
550 for (GList *di = dragger->parent->draggers; di != NULL; di = di->next) {
551 GrDragger *d_new = (GrDragger *) di->data;
552 if (dragger->mayMerge(d_new) && NR::L2 (d_new->point - p) < snap_dist) {
554 // Merge draggers:
555 for (GSList const* i = dragger->draggables; i != NULL; i = i->next) { // for all draggables of dragger
556 GrDraggable *draggable = (GrDraggable *) i->data;
557 // copy draggable to d_new:
558 GrDraggable *da_new = new GrDraggable (draggable->item, draggable->point_type, draggable->point_i, draggable->fill_or_stroke);
559 d_new->addDraggable (da_new);
560 }
562 // unlink and delete this dragger
563 dragger->parent->draggers = g_list_remove (dragger->parent->draggers, dragger);
564 delete dragger;
566 // update the new merged dragger
567 d_new->fireDraggables(true, false, true);
568 d_new->parent->updateLines();
569 d_new->parent->setSelected (d_new);
570 d_new->updateKnotShape ();
571 d_new->updateTip ();
572 d_new->updateDependencies(true);
573 sp_document_done (sp_desktop_document (d_new->parent->desktop), SP_VERB_CONTEXT_GRADIENT,
574 _("Merge gradient handles"));
575 return;
576 }
577 }
578 }
580 if (!((state & GDK_SHIFT_MASK) || ((state & GDK_CONTROL_MASK) && (state & GDK_MOD1_MASK)))) {
581 // Try snapping to the grid or guides
582 SPDesktop *desktop = dragger->parent->desktop;
583 SnapManager &m = desktop->namedview->snap_manager;
584 m.setup(desktop);
585 Inkscape::SnappedPoint s = m.freeSnap(Inkscape::SnapPreferences::SNAPPOINT_NODE, to_2geom(p));
586 if (s.getSnapped()) {
587 p = s.getPoint();
588 sp_knot_moveto (knot, p);
589 } else {
590 bool was_snapped = false;
591 double dist = NR_HUGE;
592 // No snapping so far, let's see if we need to snap to any of the levels
593 for (guint i = 0; i < dragger->parent->hor_levels.size(); i++) {
594 dist = fabs(p[NR::Y] - dragger->parent->hor_levels[i]);
595 if (dist < snap_dist) {
596 p[NR::Y] = dragger->parent->hor_levels[i];
597 s = Inkscape::SnappedPoint(p, Inkscape::SNAPTARGET_GRADIENT, dist, snap_dist, false, false);
598 was_snapped = true;
599 sp_knot_moveto (knot, p);
600 }
601 }
602 for (guint i = 0; i < dragger->parent->vert_levels.size(); i++) {
603 dist = fabs(p[NR::X] - dragger->parent->vert_levels[i]);
604 if (dist < snap_dist) {
605 p[NR::X] = dragger->parent->vert_levels[i];
606 s = Inkscape::SnappedPoint(p, Inkscape::SNAPTARGET_GRADIENT, dist, snap_dist, false, false);
607 was_snapped = true;
608 sp_knot_moveto (knot, p);
609 }
610 }
611 if (was_snapped) {
612 desktop->snapindicator->set_new_snappoint(s);
613 }
614 }
615 }
617 if (state & GDK_CONTROL_MASK) {
618 Inkscape::Preferences *prefs = Inkscape::Preferences::get();
619 unsigned snaps = abs(prefs->getInt("/options/rotationsnapsperpi/value", 12));
620 /* 0 means no snapping. */
622 // This list will store snap vectors from all draggables of dragger
623 GSList *snap_vectors = NULL;
625 for (GSList const* i = dragger->draggables; i != NULL; i = i->next) {
626 GrDraggable *draggable = (GrDraggable *) i->data;
628 NR::Point *dr_snap = NULL;
630 if (draggable->point_type == POINT_LG_BEGIN || draggable->point_type == POINT_LG_END) {
631 for (GList *di = dragger->parent->draggers; di != NULL; di = di->next) {
632 GrDragger *d_new = (GrDragger *) di->data;
633 if (d_new == dragger)
634 continue;
635 if (d_new->isA (draggable->item,
636 draggable->point_type == POINT_LG_BEGIN? POINT_LG_END : POINT_LG_BEGIN,
637 draggable->fill_or_stroke)) {
638 // found the other end of the linear gradient;
639 if (state & GDK_SHIFT_MASK) {
640 // moving linear around center
641 NR::Point center = NR::Point (0.5*(d_new->point + dragger->point));
642 dr_snap = ¢er;
643 } else {
644 // moving linear around the other end
645 dr_snap = &d_new->point;
646 }
647 }
648 }
649 } else if (draggable->point_type == POINT_RG_R1 || draggable->point_type == POINT_RG_R2 || draggable->point_type == POINT_RG_FOCUS) {
650 for (GList *di = dragger->parent->draggers; di != NULL; di = di->next) {
651 GrDragger *d_new = (GrDragger *) di->data;
652 if (d_new == dragger)
653 continue;
654 if (d_new->isA (draggable->item,
655 POINT_RG_CENTER,
656 draggable->fill_or_stroke)) {
657 // found the center of the radial gradient;
658 dr_snap = &(d_new->point);
659 }
660 }
661 } else if (draggable->point_type == POINT_RG_CENTER) {
662 // radial center snaps to hor/vert relative to its original position
663 dr_snap = &(dragger->point_original);
664 }
666 NR::Point *snap_vector = NULL;
667 if (dr_snap) {
668 if (state & GDK_MOD1_MASK) {
669 // with Alt, snap to the original angle and its perpendiculars
670 snap_vector = get_snap_vector (p, *dr_snap, M_PI/2, NR::atan2 (dragger->point_original - *dr_snap));
671 } else {
672 // with Ctrl, snap to M_PI/snaps
673 snap_vector = get_snap_vector (p, *dr_snap, M_PI/snaps, 0);
674 }
675 }
676 if (snap_vector) {
677 snap_vectors = g_slist_prepend (snap_vectors, snap_vector);
678 }
679 }
681 // Move by the smallest of snap vectors:
682 NR::Point move(9999, 9999);
683 for (GSList const *i = snap_vectors; i != NULL; i = i->next) {
684 NR::Point *snap_vector = (NR::Point *) i->data;
685 if (NR::L2(*snap_vector) < NR::L2(move))
686 move = *snap_vector;
687 }
688 if (move[NR::X] < 9999) {
689 p += move;
690 sp_knot_moveto (knot, p);
691 }
693 g_slist_free(snap_vectors);
694 }
696 drag->keep_selection = (bool) g_list_find(drag->selected, dragger);
697 bool scale_radial = (state & GDK_CONTROL_MASK) && (state & GDK_SHIFT_MASK);
699 if (drag->keep_selection) {
700 NR::Point diff = p - dragger->point;
701 drag->selected_move_nowrite (diff[NR::X], diff[NR::Y], scale_radial);
702 } else {
703 dragger->point = p;
704 dragger->fireDraggables (false, scale_radial);
705 dragger->updateDependencies(false);
706 }
708 }
711 static void
712 gr_midpoint_limits(GrDragger *dragger, SPObject *server, NR::Point *begin, NR::Point *end, NR::Point *low_lim, NR::Point *high_lim, GSList **moving)
713 {
715 GrDrag *drag = dragger->parent;
716 // a midpoint dragger can (logically) only contain one GrDraggable
717 GrDraggable *draggable = (GrDraggable *) dragger->draggables->data;
719 // get begin and end points between which dragging is allowed:
720 // the draglimits are between knot(lowest_i - 1) and knot(highest_i + 1)
721 *moving = g_slist_append(*moving, dragger);
723 guint lowest_i = draggable->point_i;
724 guint highest_i = draggable->point_i;
725 GrDragger *lowest_dragger = dragger;
726 GrDragger *highest_dragger = dragger;
727 if (dragger->isSelected()) {
728 GrDragger* d_add;
729 while ( true )
730 {
731 d_add = drag->getDraggerFor(draggable->item, draggable->point_type, lowest_i - 1, draggable->fill_or_stroke);
732 if ( d_add && g_list_find(drag->selected, d_add) ) {
733 lowest_i = lowest_i - 1;
734 *moving = g_slist_prepend(*moving, d_add);
735 lowest_dragger = d_add;
736 } else {
737 break;
738 }
739 }
741 while ( true )
742 {
743 d_add = drag->getDraggerFor(draggable->item, draggable->point_type, highest_i + 1, draggable->fill_or_stroke);
744 if ( d_add && g_list_find(drag->selected, d_add) ) {
745 highest_i = highest_i + 1;
746 *moving = g_slist_append(*moving, d_add);
747 highest_dragger = d_add;
748 } else {
749 break;
750 }
751 }
752 }
754 if ( SP_IS_LINEARGRADIENT(server) ) {
755 guint num = SP_LINEARGRADIENT(server)->vector.stops.size();
756 GrDragger *d_temp;
757 if (lowest_i == 1) {
758 d_temp = drag->getDraggerFor (draggable->item, POINT_LG_BEGIN, 0, draggable->fill_or_stroke);
759 } else {
760 d_temp = drag->getDraggerFor (draggable->item, POINT_LG_MID, lowest_i - 1, draggable->fill_or_stroke);
761 }
762 if (d_temp)
763 *begin = d_temp->point;
765 d_temp = drag->getDraggerFor (draggable->item, POINT_LG_MID, highest_i + 1, draggable->fill_or_stroke);
766 if (d_temp == NULL) {
767 d_temp = drag->getDraggerFor (draggable->item, POINT_LG_END, num-1, draggable->fill_or_stroke);
768 }
769 if (d_temp)
770 *end = d_temp->point;
771 } else if ( SP_IS_RADIALGRADIENT(server) ) {
772 guint num = SP_RADIALGRADIENT(server)->vector.stops.size();
773 GrDragger *d_temp;
774 if (lowest_i == 1) {
775 d_temp = drag->getDraggerFor (draggable->item, POINT_RG_CENTER, 0, draggable->fill_or_stroke);
776 } else {
777 d_temp = drag->getDraggerFor (draggable->item, draggable->point_type, lowest_i - 1, draggable->fill_or_stroke);
778 }
779 if (d_temp)
780 *begin = d_temp->point;
782 d_temp = drag->getDraggerFor (draggable->item, draggable->point_type, highest_i + 1, draggable->fill_or_stroke);
783 if (d_temp == NULL) {
784 d_temp = drag->getDraggerFor (draggable->item, (draggable->point_type==POINT_RG_MID1) ? POINT_RG_R1 : POINT_RG_R2, num-1, draggable->fill_or_stroke);
785 }
786 if (d_temp)
787 *end = d_temp->point;
788 }
790 *low_lim = dragger->point - (lowest_dragger->point - *begin);
791 *high_lim = dragger->point - (highest_dragger->point - *end);
792 }
796 /**
797 Called when a midpoint knot is dragged.
798 */
799 static void
800 gr_knot_moved_midpoint_handler(SPKnot */*knot*/, NR::Point const *ppointer, guint state, gpointer data)
801 {
802 GrDragger *dragger = (GrDragger *) data;
803 GrDrag *drag = dragger->parent;
804 // a midpoint dragger can (logically) only contain one GrDraggable
805 GrDraggable *draggable = (GrDraggable *) dragger->draggables->data;
807 // FIXME: take from prefs
808 double snap_fraction = 0.1;
810 NR::Point p = *ppointer;
811 NR::Point begin(0,0), end(0,0);
812 NR::Point low_lim(0,0), high_lim(0,0);
814 SPObject *server = draggable->getServer();
816 GSList *moving = NULL;
817 gr_midpoint_limits(dragger, server, &begin, &end, &low_lim, &high_lim, &moving);
819 if (state & GDK_CONTROL_MASK) {
820 p = snap_vector_midpoint (p, low_lim, high_lim, snap_fraction);
821 } else {
822 p = snap_vector_midpoint (p, low_lim, high_lim, 0);
823 }
824 NR::Point displacement = p - dragger->point;
826 for (GSList const* i = moving; i != NULL; i = i->next) {
827 GrDragger *drg = (GrDragger*) i->data;
828 SPKnot *drgknot = drg->knot;
829 NR::Point this_move = displacement;
830 if (state & GDK_MOD1_MASK) {
831 // FIXME: unify all these profiles (here, in nodepath, in tweak) in one place
832 double alpha = 1.0;
833 if (NR::L2(drg->point - dragger->point) + NR::L2(drg->point - begin) - 1e-3 > NR::L2(dragger->point - begin)) { // drg is on the end side from dragger
834 double x = NR::L2(drg->point - dragger->point)/NR::L2(end - dragger->point);
835 this_move = (0.5 * cos (M_PI * (pow(x, alpha))) + 0.5) * this_move;
836 } else { // drg is on the begin side from dragger
837 double x = NR::L2(drg->point - dragger->point)/NR::L2(begin - dragger->point);
838 this_move = (0.5 * cos (M_PI * (pow(x, alpha))) + 0.5) * this_move;
839 }
840 }
841 drg->point += this_move;
842 sp_knot_moveto (drgknot, drg->point);
843 drg->fireDraggables (false);
844 drg->updateDependencies(false);
845 }
847 g_slist_free(moving);
849 drag->keep_selection = dragger->isSelected();
850 }
854 static void
855 gr_knot_grabbed_handler (SPKnot */*knot*/, unsigned int /*state*/, gpointer data)
856 {
857 GrDragger *dragger = (GrDragger *) data;
859 sp_canvas_force_full_redraw_after_interruptions(dragger->parent->desktop->canvas, 5);
860 }
862 /**
863 Called when the mouse releases a dragger knot; changes gradient writing to repr, updates other draggers if needed
864 */
865 static void
866 gr_knot_ungrabbed_handler (SPKnot *knot, unsigned int state, gpointer data)
867 {
868 GrDragger *dragger = (GrDragger *) data;
870 sp_canvas_end_forced_full_redraws(dragger->parent->desktop->canvas);
872 dragger->point_original = dragger->point = knot->pos;
874 if ((state & GDK_CONTROL_MASK) && (state & GDK_SHIFT_MASK)) {
875 dragger->fireDraggables (true, true);
876 } else {
877 dragger->fireDraggables (true);
878 }
880 for (GList *i = dragger->parent->selected; i != NULL; i = i->next) {
881 GrDragger *d = (GrDragger *) i->data;
882 if (d == dragger)
883 continue;
884 d->fireDraggables (true);
885 }
887 // make this dragger selected
888 if (!dragger->parent->keep_selection) {
889 dragger->parent->setSelected (dragger);
890 }
891 dragger->parent->keep_selection = false;
893 dragger->updateDependencies(true);
895 // we did an undoable action
896 sp_document_done (sp_desktop_document (dragger->parent->desktop), SP_VERB_CONTEXT_GRADIENT,
897 _("Move gradient handle"));
898 }
900 /**
901 Called when a dragger knot is clicked; selects the dragger or deletes it depending on the
902 state of the keyboard keys
903 */
904 static void
905 gr_knot_clicked_handler(SPKnot */*knot*/, guint state, gpointer data)
906 {
907 GrDragger *dragger = (GrDragger *) data;
908 GrDraggable *draggable = (GrDraggable *) dragger->draggables->data;
909 if (!draggable) return;
911 if ( (state & GDK_CONTROL_MASK) && (state & GDK_MOD1_MASK ) ) {
912 // delete this knot from vector
913 SPGradient *gradient = sp_item_gradient (draggable->item, draggable->fill_or_stroke);
914 gradient = sp_gradient_get_vector (gradient, false);
915 if (gradient->vector.stops.size() > 2) { // 2 is the minimum
916 SPStop *stop = NULL;
917 switch (draggable->point_type) { // if we delete first or last stop, move the next/previous to the edge
918 case POINT_LG_BEGIN:
919 case POINT_RG_CENTER:
920 stop = sp_first_stop(gradient);
921 {
922 SPStop *next = sp_next_stop (stop);
923 if (next) {
924 next->offset = 0;
925 sp_repr_set_css_double (SP_OBJECT_REPR (next), "offset", 0);
926 }
927 }
928 break;
929 case POINT_LG_END:
930 case POINT_RG_R1:
931 case POINT_RG_R2:
932 stop = sp_last_stop(gradient);
933 {
934 SPStop *prev = sp_prev_stop (stop, gradient);
935 if (prev) {
936 prev->offset = 1;
937 sp_repr_set_css_double (SP_OBJECT_REPR (prev), "offset", 1);
938 }
939 }
940 break;
941 case POINT_LG_MID:
942 case POINT_RG_MID1:
943 case POINT_RG_MID2:
944 stop = sp_get_stop_i(gradient, draggable->point_i);
945 break;
946 }
948 SP_OBJECT_REPR(gradient)->removeChild(SP_OBJECT_REPR(stop));
949 sp_document_done (SP_OBJECT_DOCUMENT (gradient), SP_VERB_CONTEXT_GRADIENT,
950 _("Delete gradient stop"));
951 }
952 } else {
953 // select the dragger
954 dragger->point_original = dragger->point;
956 if ( state & GDK_SHIFT_MASK ) {
957 dragger->parent->setSelected (dragger, true, false);
958 } else {
959 dragger->parent->setSelected (dragger);
960 }
961 }
962 }
964 /**
965 Called when a dragger knot is doubleclicked; opens gradient editor with the stop from the first draggable
966 */
967 static void
968 gr_knot_doubleclicked_handler (SPKnot */*knot*/, guint /*state*/, gpointer data)
969 {
970 GrDragger *dragger = (GrDragger *) data;
972 dragger->point_original = dragger->point;
974 if (dragger->draggables == NULL)
975 return;
977 GrDraggable *draggable = (GrDraggable *) dragger->draggables->data;
978 sp_item_gradient_edit_stop (draggable->item, draggable->point_type, draggable->point_i, draggable->fill_or_stroke);
979 }
981 /**
982 Act upon all draggables of the dragger, setting them to the dragger's point
983 */
984 void
985 GrDragger::fireDraggables (bool write_repr, bool scale_radial, bool merging_focus)
986 {
987 for (GSList const* i = this->draggables; i != NULL; i = i->next) {
988 GrDraggable *draggable = (GrDraggable *) i->data;
990 // set local_change flag so that selection_changed callback does not regenerate draggers
991 this->parent->local_change = true;
993 // change gradient, optionally writing to repr; prevent focus from moving if it's snapped
994 // to the center, unless it's the first update upon merge when we must snap it to the point
995 if (merging_focus ||
996 !(draggable->point_type == POINT_RG_FOCUS && this->isA(draggable->item, POINT_RG_CENTER, draggable->point_i, draggable->fill_or_stroke)))
997 {
998 sp_item_gradient_set_coords (draggable->item, draggable->point_type, draggable->point_i, this->point, draggable->fill_or_stroke, write_repr, scale_radial);
999 }
1000 }
1001 }
1003 /**
1004 Checks if the dragger has a draggable with this point_type
1005 */
1006 bool
1007 GrDragger::isA (gint point_type)
1008 {
1009 for (GSList const* i = this->draggables; i != NULL; i = i->next) {
1010 GrDraggable *draggable = (GrDraggable *) i->data;
1011 if (draggable->point_type == point_type) {
1012 return true;
1013 }
1014 }
1015 return false;
1016 }
1018 /**
1019 Checks if the dragger has a draggable with this item, point_type + point_i (number), fill_or_stroke
1020 */
1021 bool
1022 GrDragger::isA (SPItem *item, gint point_type, gint point_i, bool fill_or_stroke)
1023 {
1024 for (GSList const* i = this->draggables; i != NULL; i = i->next) {
1025 GrDraggable *draggable = (GrDraggable *) i->data;
1026 if ( (draggable->point_type == point_type) && (draggable->point_i == point_i) && (draggable->item == item) && (draggable->fill_or_stroke == fill_or_stroke) ) {
1027 return true;
1028 }
1029 }
1030 return false;
1031 }
1033 /**
1034 Checks if the dragger has a draggable with this item, point_type, fill_or_stroke
1035 */
1036 bool
1037 GrDragger::isA (SPItem *item, gint point_type, bool fill_or_stroke)
1038 {
1039 for (GSList const* i = this->draggables; i != NULL; i = i->next) {
1040 GrDraggable *draggable = (GrDraggable *) i->data;
1041 if ( (draggable->point_type == point_type) && (draggable->item == item) && (draggable->fill_or_stroke == fill_or_stroke) ) {
1042 return true;
1043 }
1044 }
1045 return false;
1046 }
1048 bool
1049 GrDraggable::mayMerge (GrDraggable *da2)
1050 {
1051 if ((this->item == da2->item) && (this->fill_or_stroke == da2->fill_or_stroke)) {
1052 // we must not merge the points of the same gradient!
1053 if (!((this->point_type == POINT_RG_FOCUS && da2->point_type == POINT_RG_CENTER) ||
1054 (this->point_type == POINT_RG_CENTER && da2->point_type == POINT_RG_FOCUS))) {
1055 // except that we can snap center and focus together
1056 return false;
1057 }
1058 }
1059 // disable merging of midpoints.
1060 if ( (this->point_type == POINT_LG_MID) || (da2->point_type == POINT_LG_MID)
1061 || (this->point_type == POINT_RG_MID1) || (da2->point_type == POINT_RG_MID1)
1062 || (this->point_type == POINT_RG_MID2) || (da2->point_type == POINT_RG_MID2) )
1063 return false;
1065 return true;
1066 }
1068 bool
1069 GrDragger::mayMerge (GrDragger *other)
1070 {
1071 if (this == other)
1072 return false;
1074 for (GSList const* i = this->draggables; i != NULL; i = i->next) { // for all draggables of this
1075 GrDraggable *da1 = (GrDraggable *) i->data;
1076 for (GSList const* j = other->draggables; j != NULL; j = j->next) { // for all draggables of other
1077 GrDraggable *da2 = (GrDraggable *) j->data;
1078 if (!da1->mayMerge(da2))
1079 return false;
1080 }
1081 }
1082 return true;
1083 }
1085 bool
1086 GrDragger::mayMerge (GrDraggable *da2)
1087 {
1088 for (GSList const* i = this->draggables; i != NULL; i = i->next) { // for all draggables of this
1089 GrDraggable *da1 = (GrDraggable *) i->data;
1090 if (!da1->mayMerge(da2))
1091 return false;
1092 }
1093 return true;
1094 }
1096 /**
1097 Updates the statusbar tip of the dragger knot, based on its draggables
1098 */
1099 void
1100 GrDragger::updateTip ()
1101 {
1102 if (this->knot && this->knot->tip) {
1103 g_free (this->knot->tip);
1104 this->knot->tip = NULL;
1105 }
1107 if (g_slist_length (this->draggables) == 1) {
1108 GrDraggable *draggable = (GrDraggable *) this->draggables->data;
1109 char *item_desc = sp_item_description(draggable->item);
1110 switch (draggable->point_type) {
1111 case POINT_LG_MID:
1112 case POINT_RG_MID1:
1113 case POINT_RG_MID2:
1114 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"),
1115 _(gr_knot_descr[draggable->point_type]),
1116 draggable->point_i,
1117 item_desc,
1118 draggable->fill_or_stroke == false ? _(" (stroke)") : "");
1119 break;
1121 default:
1122 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"),
1123 _(gr_knot_descr[draggable->point_type]),
1124 item_desc,
1125 draggable->fill_or_stroke == false ? _(" (stroke)") : "");
1126 break;
1127 }
1128 g_free(item_desc);
1129 } else if (g_slist_length (draggables) == 2 && isA (POINT_RG_CENTER) && isA (POINT_RG_FOCUS)) {
1130 this->knot->tip = g_strdup_printf (_("Radial gradient <b>center</b> and <b>focus</b>; drag with <b>Shift</b> to separate focus"));
1131 } else {
1132 int length = g_slist_length (this->draggables);
1133 this->knot->tip = g_strdup_printf (ngettext("Gradient point shared by <b>%d</b> gradient; drag with <b>Shift</b> to separate",
1134 "Gradient point shared by <b>%d</b> gradients; drag with <b>Shift</b> to separate",
1135 length),
1136 length);
1137 }
1138 }
1140 /**
1141 Adds a draggable to the dragger
1142 */
1143 void
1144 GrDragger::updateKnotShape ()
1145 {
1146 if (!draggables)
1147 return;
1148 GrDraggable *last = (GrDraggable *) g_slist_last(draggables)->data;
1149 g_object_set (G_OBJECT (this->knot->item), "shape", gr_knot_shapes[last->point_type], NULL);
1150 }
1152 /**
1153 Adds a draggable to the dragger
1154 */
1155 void
1156 GrDragger::addDraggable (GrDraggable *draggable)
1157 {
1158 this->draggables = g_slist_prepend (this->draggables, draggable);
1160 this->updateTip();
1161 }
1164 /**
1165 Moves this dragger to the point of the given draggable, acting upon all other draggables
1166 */
1167 void
1168 GrDragger::moveThisToDraggable (SPItem *item, gint point_type, gint point_i, bool fill_or_stroke, bool write_repr)
1169 {
1170 this->point = sp_item_gradient_get_coords (item, point_type, point_i, fill_or_stroke);
1171 this->point_original = this->point;
1173 sp_knot_moveto (this->knot, this->point);
1175 for (GSList const* i = this->draggables; i != NULL; i = i->next) {
1176 GrDraggable *da = (GrDraggable *) i->data;
1177 if ( (da->item == item) &&
1178 (point_type == -1 || da->point_type == point_type) &&
1179 (point_i == -1 || da->point_i == point_i) &&
1180 (da->fill_or_stroke == fill_or_stroke) ) {
1181 continue;
1182 }
1183 sp_item_gradient_set_coords (da->item, da->point_type, da->point_i, this->point, da->fill_or_stroke, write_repr, false);
1184 }
1185 // FIXME: here we should also call this->updateDependencies(write_repr); to propagate updating, but how to prevent loops?
1186 }
1189 /**
1190 Moves all midstop draggables that depend on this one
1191 */
1192 void
1193 GrDragger::updateMidstopDependencies (GrDraggable *draggable, bool write_repr) {
1194 SPObject *server = draggable->getServer();
1195 if (!server)
1196 return;
1197 guint num = SP_GRADIENT(server)->vector.stops.size();
1198 if (num <= 2) return;
1200 if ( SP_IS_LINEARGRADIENT(server) ) {
1201 for ( guint i = 1; i < num - 1; i++ ) {
1202 this->moveOtherToDraggable (draggable->item, POINT_LG_MID, i, draggable->fill_or_stroke, write_repr);
1203 }
1204 } else if ( SP_IS_RADIALGRADIENT(server) ) {
1205 for ( guint i = 1; i < num - 1; i++ ) {
1206 this->moveOtherToDraggable (draggable->item, POINT_RG_MID1, i, draggable->fill_or_stroke, write_repr);
1207 this->moveOtherToDraggable (draggable->item, POINT_RG_MID2, i, draggable->fill_or_stroke, write_repr);
1208 }
1209 }
1210 }
1213 /**
1214 Moves all draggables that depend on this one
1215 */
1216 void
1217 GrDragger::updateDependencies (bool write_repr)
1218 {
1219 for (GSList const* i = this->draggables; i != NULL; i = i->next) {
1220 GrDraggable *draggable = (GrDraggable *) i->data;
1221 switch (draggable->point_type) {
1222 case POINT_LG_BEGIN:
1223 {
1224 // the end point is dependent only when dragging with ctrl+shift
1225 this->moveOtherToDraggable (draggable->item, POINT_LG_END, -1, draggable->fill_or_stroke, write_repr);
1227 this->updateMidstopDependencies (draggable, write_repr);
1228 }
1229 break;
1230 case POINT_LG_END:
1231 {
1232 // the begin point is dependent only when dragging with ctrl+shift
1233 this->moveOtherToDraggable (draggable->item, POINT_LG_BEGIN, 0, draggable->fill_or_stroke, write_repr);
1235 this->updateMidstopDependencies (draggable, write_repr);
1236 }
1237 break;
1238 case POINT_LG_MID:
1239 // no other nodes depend on mid points.
1240 break;
1241 case POINT_RG_R2:
1242 this->moveOtherToDraggable (draggable->item, POINT_RG_R1, -1, draggable->fill_or_stroke, write_repr);
1243 this->moveOtherToDraggable (draggable->item, POINT_RG_FOCUS, -1, draggable->fill_or_stroke, write_repr);
1244 this->updateMidstopDependencies (draggable, write_repr);
1245 break;
1246 case POINT_RG_R1:
1247 this->moveOtherToDraggable (draggable->item, POINT_RG_R2, -1, draggable->fill_or_stroke, write_repr);
1248 this->moveOtherToDraggable (draggable->item, POINT_RG_FOCUS, -1, draggable->fill_or_stroke, write_repr);
1249 this->updateMidstopDependencies (draggable, write_repr);
1250 break;
1251 case POINT_RG_CENTER:
1252 this->moveOtherToDraggable (draggable->item, POINT_RG_R1, -1, draggable->fill_or_stroke, write_repr);
1253 this->moveOtherToDraggable (draggable->item, POINT_RG_R2, -1, draggable->fill_or_stroke, write_repr);
1254 this->moveOtherToDraggable (draggable->item, POINT_RG_FOCUS, -1, draggable->fill_or_stroke, write_repr);
1255 this->updateMidstopDependencies (draggable, write_repr);
1256 break;
1257 case POINT_RG_FOCUS:
1258 // nothing can depend on that
1259 break;
1260 case POINT_RG_MID1:
1261 this->moveOtherToDraggable (draggable->item, POINT_RG_MID2, draggable->point_i, draggable->fill_or_stroke, write_repr);
1262 break;
1263 case POINT_RG_MID2:
1264 this->moveOtherToDraggable (draggable->item, POINT_RG_MID1, draggable->point_i, draggable->fill_or_stroke, write_repr);
1265 break;
1266 default:
1267 break;
1268 }
1269 }
1270 }
1274 GrDragger::GrDragger (GrDrag *parent, NR::Point p, GrDraggable *draggable)
1275 {
1276 this->draggables = NULL;
1278 this->parent = parent;
1280 this->point = p;
1281 this->point_original = p;
1283 // create the knot
1284 this->knot = sp_knot_new (parent->desktop, NULL);
1285 this->knot->setMode(SP_KNOT_MODE_XOR);
1286 this->knot->setFill(GR_KNOT_COLOR_NORMAL, GR_KNOT_COLOR_MOUSEOVER, GR_KNOT_COLOR_MOUSEOVER);
1287 this->knot->setStroke(0x0000007f, 0x0000007f, 0x0000007f);
1288 sp_knot_update_ctrl(this->knot);
1290 // move knot to the given point
1291 sp_knot_set_position (this->knot, p, SP_KNOT_STATE_NORMAL);
1292 sp_knot_show (this->knot);
1294 // connect knot's signals
1295 if ( (draggable) // it can be NULL if a node in unsnapped (eg. focus point unsnapped from center)
1296 // luckily, midstops never snap to other nodes so are never unsnapped...
1297 && ( (draggable->point_type == POINT_LG_MID)
1298 || (draggable->point_type == POINT_RG_MID1)
1299 || (draggable->point_type == POINT_RG_MID2) ) )
1300 {
1301 this->handler_id = g_signal_connect (G_OBJECT (this->knot), "moved", G_CALLBACK (gr_knot_moved_midpoint_handler), this);
1302 } else {
1303 this->handler_id = g_signal_connect (G_OBJECT (this->knot), "moved", G_CALLBACK (gr_knot_moved_handler), this);
1304 }
1305 g_signal_connect (G_OBJECT (this->knot), "clicked", G_CALLBACK (gr_knot_clicked_handler), this);
1306 g_signal_connect (G_OBJECT (this->knot), "doubleclicked", G_CALLBACK (gr_knot_doubleclicked_handler), this);
1307 g_signal_connect (G_OBJECT (this->knot), "grabbed", G_CALLBACK (gr_knot_grabbed_handler), this);
1308 g_signal_connect (G_OBJECT (this->knot), "ungrabbed", G_CALLBACK (gr_knot_ungrabbed_handler), this);
1310 // add the initial draggable
1311 if (draggable)
1312 this->addDraggable (draggable);
1313 updateKnotShape();
1314 }
1316 GrDragger::~GrDragger ()
1317 {
1318 // unselect if it was selected
1319 this->parent->setDeselected(this);
1321 // disconnect signals
1322 g_signal_handlers_disconnect_by_func(G_OBJECT(this->knot), (gpointer) G_CALLBACK (gr_knot_moved_handler), this);
1323 g_signal_handlers_disconnect_by_func(G_OBJECT(this->knot), (gpointer) G_CALLBACK (gr_knot_clicked_handler), this);
1324 g_signal_handlers_disconnect_by_func(G_OBJECT(this->knot), (gpointer) G_CALLBACK (gr_knot_doubleclicked_handler), this);
1325 g_signal_handlers_disconnect_by_func(G_OBJECT(this->knot), (gpointer) G_CALLBACK (gr_knot_grabbed_handler), this);
1326 g_signal_handlers_disconnect_by_func(G_OBJECT(this->knot), (gpointer) G_CALLBACK (gr_knot_ungrabbed_handler), this);
1328 /* unref should call destroy */
1329 g_object_unref (G_OBJECT (this->knot));
1331 // delete all draggables
1332 for (GSList const* i = this->draggables; i != NULL; i = i->next) {
1333 delete ((GrDraggable *) i->data);
1334 }
1335 g_slist_free (this->draggables);
1336 this->draggables = NULL;
1337 }
1339 /**
1340 Select the dragger which has the given draggable.
1341 */
1342 GrDragger *
1343 GrDrag::getDraggerFor (SPItem *item, gint point_type, gint point_i, bool fill_or_stroke)
1344 {
1345 for (GList const* i = this->draggers; i != NULL; i = i->next) {
1346 GrDragger *dragger = (GrDragger *) i->data;
1347 for (GSList const* j = dragger->draggables; j != NULL; j = j->next) {
1348 GrDraggable *da2 = (GrDraggable *) j->data;
1349 if ( (da2->item == item) &&
1350 (point_type == -1 || da2->point_type == point_type) && // -1 means this does not matter
1351 (point_i == -1 || da2->point_i == point_i) && // -1 means this does not matter
1352 (da2->fill_or_stroke == fill_or_stroke)) {
1353 return (dragger);
1354 }
1355 }
1356 }
1357 return NULL;
1358 }
1361 void
1362 GrDragger::moveOtherToDraggable (SPItem *item, gint point_type, gint point_i, bool fill_or_stroke, bool write_repr)
1363 {
1364 GrDragger *d = this->parent->getDraggerFor (item, point_type, point_i, fill_or_stroke);
1365 if (d && d != this) {
1366 d->moveThisToDraggable (item, point_type, point_i, fill_or_stroke, write_repr);
1367 }
1368 }
1371 /**
1372 Draw this dragger as selected
1373 */
1374 void
1375 GrDragger::select()
1376 {
1377 this->knot->fill [SP_KNOT_STATE_NORMAL] = GR_KNOT_COLOR_SELECTED;
1378 g_object_set (G_OBJECT (this->knot->item), "fill_color", GR_KNOT_COLOR_SELECTED, NULL);
1379 }
1381 /**
1382 Draw this dragger as normal (deselected)
1383 */
1384 void
1385 GrDragger::deselect()
1386 {
1387 this->knot->fill [SP_KNOT_STATE_NORMAL] = GR_KNOT_COLOR_NORMAL;
1388 g_object_set (G_OBJECT (this->knot->item), "fill_color", GR_KNOT_COLOR_NORMAL, NULL);
1389 }
1391 bool
1392 GrDragger::isSelected()
1393 {
1394 return g_list_find (parent->selected, this);
1395 }
1397 /**
1398 \brief Deselect all stops/draggers (private)
1399 */
1400 void
1401 GrDrag::deselect_all()
1402 {
1403 while (selected) {
1404 ( (GrDragger*) selected->data)->deselect();
1405 selected = g_list_remove(selected, selected->data);
1406 }
1407 }
1409 /**
1410 \brief Deselect all stops/draggers (public; emits signal)
1411 */
1412 void
1413 GrDrag::deselectAll()
1414 {
1415 deselect_all();
1416 this->desktop->emitToolSubselectionChanged(NULL);
1417 }
1419 /**
1420 \brief Select all stops/draggers
1421 */
1422 void
1423 GrDrag::selectAll()
1424 {
1425 for (GList *l = this->draggers; l != NULL; l = l->next) {
1426 GrDragger *d = ((GrDragger *) l->data);
1427 setSelected (d, true, true);
1428 }
1429 }
1431 /**
1432 \brief Select all stops/draggers that match the coords
1433 */
1434 void
1435 GrDrag::selectByCoords(std::vector<NR::Point> coords)
1436 {
1437 for (GList *l = this->draggers; l != NULL; l = l->next) {
1438 GrDragger *d = ((GrDragger *) l->data);
1439 for (guint k = 0; k < coords.size(); k++) {
1440 if (NR::L2 (d->point - coords[k]) < 1e-4) {
1441 setSelected (d, true, true);
1442 }
1443 }
1444 }
1445 }
1448 /**
1449 \brief Select all stops/draggers that fall within the rect
1450 */
1451 void
1452 GrDrag::selectRect(Geom::Rect const &r)
1453 {
1454 for (GList *l = this->draggers; l != NULL; l = l->next) {
1455 GrDragger *d = ((GrDragger *) l->data);
1456 if (r.contains(d->point)) {
1457 setSelected (d, true, true);
1458 }
1459 }
1460 }
1462 /**
1463 \brief Select a dragger
1464 \param dragger The dragger to select
1465 \param add_to_selection If true, add to selection, otherwise deselect others
1466 \param override If true, always select this node, otherwise toggle selected status
1467 */
1468 void
1469 GrDrag::setSelected (GrDragger *dragger, bool add_to_selection, bool override)
1470 {
1471 GrDragger *seldragger = NULL;
1473 if (add_to_selection) {
1474 if (!dragger) return;
1475 if (override) {
1476 if (!g_list_find(selected, dragger)) {
1477 selected = g_list_prepend(selected, dragger);
1478 }
1479 dragger->select();
1480 seldragger = dragger;
1481 } else { // toggle
1482 if (g_list_find(selected, dragger)) {
1483 selected = g_list_remove(selected, dragger);
1484 dragger->deselect();
1485 if (selected) {
1486 seldragger = (GrDragger*) selected->data; // select the dragger that is first in the list
1487 }
1488 } else {
1489 selected = g_list_prepend(selected, dragger);
1490 dragger->select();
1491 seldragger = dragger;
1492 }
1493 }
1494 } else {
1495 deselect_all();
1496 if (dragger) {
1497 selected = g_list_prepend(selected, dragger);
1498 dragger->select();
1499 seldragger = dragger;
1500 }
1501 }
1502 if (seldragger) {
1503 this->desktop->emitToolSubselectionChanged((gpointer) seldragger);
1504 }
1505 }
1507 /**
1508 \brief Deselect a dragger
1509 \param dragger The dragger to deselect
1510 */
1511 void
1512 GrDrag::setDeselected (GrDragger *dragger)
1513 {
1514 if (g_list_find(selected, dragger)) {
1515 selected = g_list_remove(selected, dragger);
1516 dragger->deselect();
1517 }
1518 this->desktop->emitToolSubselectionChanged((gpointer) (selected ? selected->data : NULL ));
1519 }
1523 /**
1524 Create a line from p1 to p2 and add it to the lines list
1525 */
1526 void
1527 GrDrag::addLine (SPItem *item, NR::Point p1, NR::Point p2, guint32 rgba)
1528 {
1529 SPCanvasItem *line = sp_canvas_item_new(sp_desktop_controls(this->desktop),
1530 SP_TYPE_CTRLLINE, NULL);
1531 sp_canvas_item_move_to_z(line, 0);
1532 SP_CTRLLINE(line)->item = item;
1533 sp_ctrlline_set_coords(SP_CTRLLINE(line), p1, p2);
1534 if (rgba != GR_LINE_COLOR_FILL) // fill is the default, so don't set color for it to speed up redraw
1535 sp_ctrlline_set_rgba32 (SP_CTRLLINE(line), rgba);
1536 sp_canvas_item_show (line);
1537 this->lines = g_slist_append (this->lines, line);
1538 }
1540 /**
1541 If there already exists a dragger within MERGE_DIST of p, add the draggable to it; otherwise create
1542 new dragger and add it to draggers list
1543 */
1544 void
1545 GrDrag::addDragger (GrDraggable *draggable)
1546 {
1547 NR::Point p = sp_item_gradient_get_coords (draggable->item, draggable->point_type, draggable->point_i, draggable->fill_or_stroke);
1549 for (GList *i = this->draggers; i != NULL; i = i->next) {
1550 GrDragger *dragger = (GrDragger *) i->data;
1551 if (dragger->mayMerge (draggable) && NR::L2 (dragger->point - p) < MERGE_DIST) {
1552 // distance is small, merge this draggable into dragger, no need to create new dragger
1553 dragger->addDraggable (draggable);
1554 dragger->updateKnotShape();
1555 return;
1556 }
1557 }
1559 GrDragger *new_dragger = new GrDragger(this, p, draggable);
1560 // fixme: draggers should be added AFTER the last one: this way tabbing through them will be from begin to end.
1561 this->draggers = g_list_append (this->draggers, new_dragger);
1562 }
1564 /**
1565 Add draggers for the radial gradient rg on item
1566 */
1567 void
1568 GrDrag::addDraggersRadial (SPRadialGradient *rg, SPItem *item, bool fill_or_stroke)
1569 {
1570 addDragger (new GrDraggable (item, POINT_RG_CENTER, 0, fill_or_stroke));
1571 guint num = rg->vector.stops.size();
1572 if (num > 2) {
1573 for ( guint i = 1; i < num - 1; i++ ) {
1574 addDragger (new GrDraggable (item, POINT_RG_MID1, i, fill_or_stroke));
1575 }
1576 }
1577 addDragger (new GrDraggable (item, POINT_RG_R1, num-1, fill_or_stroke));
1578 if (num > 2) {
1579 for ( guint i = 1; i < num - 1; i++ ) {
1580 addDragger (new GrDraggable (item, POINT_RG_MID2, i, fill_or_stroke));
1581 }
1582 }
1583 addDragger (new GrDraggable (item, POINT_RG_R2, num-1, fill_or_stroke));
1584 addDragger (new GrDraggable (item, POINT_RG_FOCUS, 0, fill_or_stroke));
1585 }
1587 /**
1588 Add draggers for the linear gradient lg on item
1589 */
1590 void
1591 GrDrag::addDraggersLinear (SPLinearGradient *lg, SPItem *item, bool fill_or_stroke)
1592 {
1593 addDragger (new GrDraggable (item, POINT_LG_BEGIN, 0, fill_or_stroke));
1594 guint num = lg->vector.stops.size();
1595 if (num > 2) {
1596 for ( guint i = 1; i < num - 1; i++ ) {
1597 addDragger (new GrDraggable (item, POINT_LG_MID, i, fill_or_stroke));
1598 }
1599 }
1600 addDragger (new GrDraggable (item, POINT_LG_END, num-1, fill_or_stroke));
1601 }
1603 /**
1604 Artificially grab the knot of this dragger; used by the gradient context
1605 */
1606 void
1607 GrDrag::grabKnot (GrDragger *dragger, gint x, gint y, guint32 etime)
1608 {
1609 if (dragger) {
1610 sp_knot_start_dragging (dragger->knot, dragger->point, x, y, etime);
1611 }
1612 }
1614 /**
1615 Artificially grab the knot of the dragger with this draggable; used by the gradient context
1616 */
1617 void
1618 GrDrag::grabKnot (SPItem *item, gint point_type, gint point_i, bool fill_or_stroke, gint x, gint y, guint32 etime)
1619 {
1620 GrDragger *dragger = getDraggerFor (item, point_type, point_i, fill_or_stroke);
1621 if (dragger) {
1622 sp_knot_start_dragging (dragger->knot, dragger->point, x, y, etime);
1623 }
1624 }
1626 /**
1627 Regenerates the draggers list from the current selection; is called when selection is changed or
1628 modified, also when a radial dragger needs to update positions of other draggers in the gradient
1629 */
1630 void
1631 GrDrag::updateDraggers ()
1632 {
1633 while (selected) {
1634 selected = g_list_remove(selected, selected->data);
1635 }
1636 // delete old draggers
1637 for (GList const* i = this->draggers; i != NULL; i = i->next) {
1638 delete ((GrDragger *) i->data);
1639 }
1640 g_list_free (this->draggers);
1641 this->draggers = NULL;
1643 g_return_if_fail (this->selection != NULL);
1645 for (GSList const* i = this->selection->itemList(); i != NULL; i = i->next) {
1647 SPItem *item = SP_ITEM(i->data);
1648 SPStyle *style = SP_OBJECT_STYLE (item);
1650 if (style && (style->fill.isPaintserver())) {
1651 SPObject *server = SP_OBJECT_STYLE_FILL_SERVER (item);
1652 if (SP_IS_LINEARGRADIENT (server)) {
1653 addDraggersLinear (SP_LINEARGRADIENT (server), item, true);
1654 } else if (SP_IS_RADIALGRADIENT (server)) {
1655 addDraggersRadial (SP_RADIALGRADIENT (server), item, true);
1656 }
1657 }
1659 if (style && (style->stroke.isPaintserver())) {
1660 SPObject *server = SP_OBJECT_STYLE_STROKE_SERVER (item);
1661 if (SP_IS_LINEARGRADIENT (server)) {
1662 addDraggersLinear (SP_LINEARGRADIENT (server), item, false);
1663 } else if (SP_IS_RADIALGRADIENT (server)) {
1664 addDraggersRadial (SP_RADIALGRADIENT (server), item, false);
1665 }
1666 }
1667 }
1668 }
1670 /**
1671 Regenerates the lines list from the current selection; is called on each move of a dragger, so that
1672 lines are always in sync with the actual gradient
1673 */
1674 void
1675 GrDrag::updateLines ()
1676 {
1677 // delete old lines
1678 for (GSList const *i = this->lines; i != NULL; i = i->next) {
1679 gtk_object_destroy( GTK_OBJECT (i->data));
1680 }
1681 g_slist_free (this->lines);
1682 this->lines = NULL;
1684 g_return_if_fail (this->selection != NULL);
1686 for (GSList const* i = this->selection->itemList(); i != NULL; i = i->next) {
1688 SPItem *item = SP_ITEM(i->data);
1690 SPStyle *style = SP_OBJECT_STYLE (item);
1692 if (style && (style->fill.isPaintserver())) {
1693 SPObject *server = SP_OBJECT_STYLE_FILL_SERVER (item);
1694 if (SP_IS_LINEARGRADIENT (server)) {
1695 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);
1696 } else if (SP_IS_RADIALGRADIENT (server)) {
1697 NR::Point center = sp_item_gradient_get_coords (item, POINT_RG_CENTER, 0, true);
1698 this->addLine (item, center, sp_item_gradient_get_coords (item, POINT_RG_R1, 0, true), GR_LINE_COLOR_FILL);
1699 this->addLine (item, center, sp_item_gradient_get_coords (item, POINT_RG_R2, 0, true), GR_LINE_COLOR_FILL);
1700 }
1701 }
1703 if (style && (style->stroke.isPaintserver())) {
1704 SPObject *server = SP_OBJECT_STYLE_STROKE_SERVER (item);
1705 if (SP_IS_LINEARGRADIENT (server)) {
1706 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);
1707 } else if (SP_IS_RADIALGRADIENT (server)) {
1708 NR::Point center = sp_item_gradient_get_coords (item, POINT_RG_CENTER, 0, false);
1709 this->addLine (item, center, sp_item_gradient_get_coords (item, POINT_RG_R1, 0, false), GR_LINE_COLOR_STROKE);
1710 this->addLine (item, center, sp_item_gradient_get_coords (item, POINT_RG_R2, 0, false), GR_LINE_COLOR_STROKE);
1711 }
1712 }
1713 }
1714 }
1716 /**
1717 Regenerates the levels list from the current selection
1718 */
1719 void
1720 GrDrag::updateLevels ()
1721 {
1722 hor_levels.clear();
1723 vert_levels.clear();
1725 g_return_if_fail (this->selection != NULL);
1727 for (GSList const* i = this->selection->itemList(); i != NULL; i = i->next) {
1728 SPItem *item = SP_ITEM(i->data);
1729 boost::optional<Geom::Rect> rect = sp_item_bbox_desktop (item);
1730 if (rect) {
1731 // Remember the edges of the bbox and the center axis
1732 hor_levels.push_back(rect->min()[Geom::Y]);
1733 hor_levels.push_back(rect->max()[Geom::Y]);
1734 hor_levels.push_back(0.5 * (rect->min()[Geom::Y] + rect->max()[Geom::Y]));
1735 vert_levels.push_back(rect->min()[Geom::X]);
1736 vert_levels.push_back(rect->max()[Geom::X]);
1737 vert_levels.push_back(0.5 * (rect->min()[Geom::X] + rect->max()[Geom::X]));
1738 }
1739 }
1740 }
1742 void
1743 GrDrag::selected_reverse_vector ()
1744 {
1745 if (selected == NULL)
1746 return;
1748 for (GSList const* i = ( (GrDragger*) selected->data )->draggables; i != NULL; i = i->next) {
1749 GrDraggable *draggable = (GrDraggable *) i->data;
1751 sp_item_gradient_reverse_vector (draggable->item, draggable->fill_or_stroke);
1752 }
1753 }
1755 void
1756 GrDrag::selected_move_nowrite (double x, double y, bool scale_radial)
1757 {
1758 selected_move (x, y, false, scale_radial);
1759 }
1761 void
1762 GrDrag::selected_move (double x, double y, bool write_repr, bool scale_radial)
1763 {
1764 if (selected == NULL)
1765 return;
1767 bool did = false;
1769 for (GList *i = selected; i != NULL; i = i->next) {
1770 GrDragger *d = (GrDragger *) i->data;
1772 if (!d->isA(POINT_LG_MID) && !d->isA(POINT_RG_MID1) && !d->isA(POINT_RG_MID2)) {
1773 // if this is an endpoint,
1775 // Moving an rg center moves its focus and radii as well.
1776 // therefore, if this is a focus or radius and if selection
1777 // contains the center as well, do not move this one
1778 if (d->isA(POINT_RG_R1) || d->isA(POINT_RG_R2) ||
1779 (d->isA(POINT_RG_FOCUS) && !d->isA(POINT_RG_CENTER))) {
1780 bool skip_radius_with_center = false;
1781 for (GList *di = selected; di != NULL; di = di->next) {
1782 GrDragger *d_new = (GrDragger *) di->data;
1783 if (d_new->isA (((GrDraggable *) d->draggables->data)->item,
1784 POINT_RG_CENTER,
1785 0,
1786 ((GrDraggable *) d->draggables->data)->fill_or_stroke)) {
1787 // FIXME: here we take into account only the first draggable!
1788 skip_radius_with_center = true;
1789 }
1790 }
1791 if (skip_radius_with_center)
1792 continue;
1793 }
1795 did = true;
1796 d->point += NR::Point (x, y);
1797 d->point_original = d->point;
1798 sp_knot_moveto (d->knot, d->point);
1800 d->fireDraggables (write_repr, scale_radial);
1802 d->updateDependencies(write_repr);
1803 }
1804 }
1806 if (write_repr && did) {
1807 // we did an undoable action
1808 sp_document_maybe_done (sp_desktop_document (desktop), "grmoveh", SP_VERB_CONTEXT_GRADIENT,
1809 _("Move gradient handle(s)"));
1810 return;
1811 }
1813 if (!did) { // none of the end draggers are selected, so let's try to move the mids
1815 GrDragger *dragger = (GrDragger *) selected->data;
1816 // a midpoint dragger can (logically) only contain one GrDraggable
1817 GrDraggable *draggable = (GrDraggable *) dragger->draggables->data;
1819 NR::Point begin(0,0), end(0,0);
1820 NR::Point low_lim(0,0), high_lim(0,0);
1822 SPObject *server = draggable->getServer();
1823 GSList *moving = NULL;
1824 gr_midpoint_limits(dragger, server, &begin, &end, &low_lim, &high_lim, &moving);
1826 NR::Point p(x, y);
1827 p = snap_vector_midpoint (dragger->point + p, low_lim, high_lim, 0);
1828 NR::Point displacement = p - dragger->point;
1830 for (GSList const* i = moving; i != NULL; i = i->next) {
1831 GrDragger *drg = (GrDragger*) i->data;
1832 SPKnot *drgknot = drg->knot;
1833 drg->point += displacement;
1834 sp_knot_moveto (drgknot, drg->point);
1835 drg->fireDraggables (true);
1836 drg->updateDependencies(true);
1837 did = true;
1838 }
1840 g_slist_free(moving);
1842 if (write_repr && did) {
1843 // we did an undoable action
1844 sp_document_maybe_done (sp_desktop_document (desktop), "grmovem", SP_VERB_CONTEXT_GRADIENT,
1845 _("Move gradient mid stop(s)"));
1846 }
1847 }
1848 }
1850 void
1851 GrDrag::selected_move_screen (double x, double y)
1852 {
1853 gdouble zoom = desktop->current_zoom();
1854 gdouble zx = x / zoom;
1855 gdouble zy = y / zoom;
1857 selected_move (zx, zy);
1858 }
1860 /**
1861 Select the knot next to the last selected one and deselect all other selected.
1862 */
1863 GrDragger *
1864 GrDrag::select_next ()
1865 {
1866 GrDragger *d = NULL;
1867 if (selected == NULL || g_list_find(draggers, selected->data)->next == NULL) {
1868 if (draggers)
1869 d = (GrDragger *) draggers->data;
1870 } else {
1871 d = (GrDragger *) g_list_find(draggers, selected->data)->next->data;
1872 }
1873 if (d)
1874 setSelected (d);
1875 return d;
1876 }
1878 /**
1879 Select the knot previous from the last selected one and deselect all other selected.
1880 */
1881 GrDragger *
1882 GrDrag::select_prev ()
1883 {
1884 GrDragger *d = NULL;
1885 if (selected == NULL || g_list_find(draggers, selected->data)->prev == NULL) {
1886 if (draggers)
1887 d = (GrDragger *) g_list_last (draggers)->data;
1888 } else {
1889 d = (GrDragger *) g_list_find(draggers, selected->data)->prev->data;
1890 }
1891 if (d)
1892 setSelected (d);
1893 return d;
1894 }
1897 // FIXME: i.m.o. an ugly function that I just made to work, but... aargh! (Johan)
1898 void
1899 GrDrag::deleteSelected (bool just_one)
1900 {
1901 if (!selected) return;
1903 SPDocument *document = false;
1905 struct StructStopInfo {
1906 SPStop * spstop;
1907 GrDraggable * draggable;
1908 SPGradient * gradient;
1909 SPGradient * vector;
1910 };
1912 GSList *midstoplist = NULL; // list of stops that must be deleted (will be deleted first)
1913 GSList *endstoplist = NULL; // list of stops that must be deleted
1914 while (selected) {
1915 GrDragger *dragger = (GrDragger*) selected->data;
1916 for (GSList * drgble = dragger->draggables; drgble != NULL; drgble = drgble->next) {
1917 GrDraggable *draggable = (GrDraggable*) drgble->data;
1918 SPGradient *gradient = sp_item_gradient (draggable->item, draggable->fill_or_stroke);
1919 SPGradient *vector = sp_gradient_get_forked_vector_if_necessary (gradient, false);
1921 switch (draggable->point_type) {
1922 case POINT_LG_MID:
1923 case POINT_RG_MID1:
1924 case POINT_RG_MID2:
1925 {
1926 SPStop *stop = sp_get_stop_i(vector, draggable->point_i);
1927 // check if already present in list. (e.g. when both RG_MID1 and RG_MID2 were selected)
1928 bool present = false;
1929 for (GSList const * l = midstoplist; l != NULL; l = l->next) {
1930 if ( (SPStop*)l->data == stop ) {
1931 present = true;
1932 break; // no need to search further.
1933 }
1934 }
1935 if (!present)
1936 midstoplist = g_slist_append(midstoplist, stop);
1937 }
1938 break;
1939 case POINT_LG_BEGIN:
1940 case POINT_LG_END:
1941 case POINT_RG_CENTER:
1942 case POINT_RG_R1:
1943 case POINT_RG_R2:
1944 {
1945 SPStop *stop = NULL;
1946 if ( (draggable->point_type == POINT_LG_BEGIN) || (draggable->point_type == POINT_RG_CENTER) ) {
1947 stop = sp_first_stop(vector);
1948 } else {
1949 stop = sp_last_stop(vector);
1950 }
1951 if (stop) {
1952 StructStopInfo *stopinfo = new StructStopInfo;
1953 stopinfo->spstop = stop;
1954 stopinfo->draggable = draggable;
1955 stopinfo->gradient = gradient;
1956 stopinfo->vector = vector;
1957 // check if already present in list. (e.g. when both R1 and R2 were selected)
1958 bool present = false;
1959 for (GSList const * l = endstoplist; l != NULL; l = l->next) {
1960 if ( ((StructStopInfo*)l->data)->spstop == stopinfo->spstop ) {
1961 present = true;
1962 break; // no need to search further.
1963 }
1964 }
1965 if (!present)
1966 endstoplist = g_slist_append(endstoplist, stopinfo);
1967 }
1968 }
1969 break;
1970 default:
1971 break;
1972 }
1973 }
1974 selected = g_list_remove(selected, dragger);
1975 if ( just_one ) break; // iterate once if just_one is set.
1976 }
1977 while (midstoplist) {
1978 SPStop *stop = (SPStop*) midstoplist->data;
1979 document = SP_OBJECT_DOCUMENT (stop);
1980 Inkscape::XML::Node * parent = SP_OBJECT_REPR(stop)->parent();
1981 parent->removeChild(SP_OBJECT_REPR(stop));
1982 midstoplist = g_slist_remove(midstoplist, stop);
1983 }
1984 while (endstoplist) {
1985 StructStopInfo *stopinfo = (StructStopInfo*) endstoplist->data;
1986 document = SP_OBJECT_DOCUMENT (stopinfo->spstop);
1988 // 2 is the minimum, cannot delete more than that without deleting the whole vector
1989 // cannot use vector->vector.stops.size() because the vector might be invalidated by deletion of a midstop
1990 // manually count the children, don't know if there already exists a function for this...
1991 int len = 0;
1992 for ( SPObject *child = sp_object_first_child(stopinfo->vector) ;
1993 child != NULL ;
1994 child = SP_OBJECT_NEXT(child) )
1995 {
1996 if ( SP_IS_STOP(child) ) len ++;
1997 }
1998 if (len > 2)
1999 {
2000 switch (stopinfo->draggable->point_type) {
2001 case POINT_LG_BEGIN:
2002 {
2003 SP_OBJECT_REPR(stopinfo->vector)->removeChild(SP_OBJECT_REPR(stopinfo->spstop));
2005 SPLinearGradient *lg = SP_LINEARGRADIENT(stopinfo->gradient);
2006 NR::Point oldbegin = NR::Point (lg->x1.computed, lg->y1.computed);
2007 NR::Point end = NR::Point (lg->x2.computed, lg->y2.computed);
2008 SPStop *stop = sp_first_stop(stopinfo->vector);
2009 gdouble offset = stop->offset;
2010 NR::Point newbegin = oldbegin + offset * (end - oldbegin);
2011 lg->x1.computed = newbegin[NR::X];
2012 lg->y1.computed = newbegin[NR::Y];
2014 Inkscape::XML::Node *repr = SP_OBJECT_REPR(stopinfo->gradient);
2015 sp_repr_set_svg_double(repr, "x1", lg->x1.computed);
2016 sp_repr_set_svg_double(repr, "y1", lg->y1.computed);
2017 stop->offset = 0;
2018 sp_repr_set_css_double (SP_OBJECT_REPR (stop), "offset", 0);
2020 // iterate through midstops to set new offset values such that they won't move on canvas.
2021 SPStop *laststop = sp_last_stop(stopinfo->vector);
2022 stop = sp_next_stop(stop);
2023 while ( stop != laststop ) {
2024 stop->offset = (stop->offset - offset)/(1 - offset);
2025 sp_repr_set_css_double (SP_OBJECT_REPR (stop), "offset", stop->offset);
2026 stop = sp_next_stop(stop);
2027 }
2028 }
2029 break;
2030 case POINT_LG_END:
2031 {
2032 SP_OBJECT_REPR(stopinfo->vector)->removeChild(SP_OBJECT_REPR(stopinfo->spstop));
2034 SPLinearGradient *lg = SP_LINEARGRADIENT(stopinfo->gradient);
2035 NR::Point begin = NR::Point (lg->x1.computed, lg->y1.computed);
2036 NR::Point oldend = NR::Point (lg->x2.computed, lg->y2.computed);
2037 SPStop *laststop = sp_last_stop(stopinfo->vector);
2038 gdouble offset = laststop->offset;
2039 NR::Point newend = begin + offset * (oldend - begin);
2040 lg->x2.computed = newend[NR::X];
2041 lg->y2.computed = newend[NR::Y];
2043 Inkscape::XML::Node *repr = SP_OBJECT_REPR(stopinfo->gradient);
2044 sp_repr_set_svg_double(repr, "x2", lg->x2.computed);
2045 sp_repr_set_svg_double(repr, "y2", lg->y2.computed);
2046 laststop->offset = 1;
2047 sp_repr_set_css_double (SP_OBJECT_REPR (laststop), "offset", 1);
2049 // iterate through midstops to set new offset values such that they won't move on canvas.
2050 SPStop *stop = sp_first_stop(stopinfo->vector);
2051 stop = sp_next_stop(stop);
2052 while ( stop != laststop ) {
2053 stop->offset = stop->offset / offset;
2054 sp_repr_set_css_double (SP_OBJECT_REPR (stop), "offset", stop->offset);
2055 stop = sp_next_stop(stop);
2056 }
2057 }
2058 break;
2059 case POINT_RG_CENTER:
2060 {
2061 SPStop *newfirst = sp_next_stop (stopinfo->spstop);
2062 if (newfirst) {
2063 newfirst->offset = 0;
2064 sp_repr_set_css_double (SP_OBJECT_REPR (newfirst), "offset", 0);
2065 }
2066 SP_OBJECT_REPR(stopinfo->vector)->removeChild(SP_OBJECT_REPR(stopinfo->spstop));
2067 }
2068 break;
2069 case POINT_RG_R1:
2070 case POINT_RG_R2:
2071 SP_OBJECT_REPR(stopinfo->vector)->removeChild(SP_OBJECT_REPR(stopinfo->spstop));
2073 SPRadialGradient *rg = SP_RADIALGRADIENT(stopinfo->gradient);
2074 double oldradius = rg->r.computed;
2075 SPStop *laststop = sp_last_stop(stopinfo->vector);
2076 gdouble offset = laststop->offset;
2077 double newradius = offset * oldradius;
2078 rg->r.computed = newradius;
2080 Inkscape::XML::Node *repr = SP_OBJECT_REPR(rg);
2081 sp_repr_set_svg_double(repr, "r", rg->r.computed);
2082 laststop->offset = 1;
2083 sp_repr_set_css_double (SP_OBJECT_REPR (laststop), "offset", 1);
2085 // iterate through midstops to set new offset values such that they won't move on canvas.
2086 SPStop *stop = sp_first_stop(stopinfo->vector);
2087 stop = sp_next_stop(stop);
2088 while ( stop != laststop ) {
2089 stop->offset = stop->offset / offset;
2090 sp_repr_set_css_double (SP_OBJECT_REPR (stop), "offset", stop->offset);
2091 stop = sp_next_stop(stop);
2092 }
2093 break;
2094 }
2095 }
2096 else
2097 { // delete the gradient from the object. set fill to unset FIXME: set to fill of unselected node?
2098 SPCSSAttr *css = sp_repr_css_attr_new ();
2100 // stopinfo->spstop is the selected stop
2101 Inkscape::XML::Node *unselectedrepr = SP_OBJECT_REPR(stopinfo->vector)->firstChild();
2102 if (unselectedrepr == SP_OBJECT_REPR(stopinfo->spstop) ) {
2103 unselectedrepr = unselectedrepr->next();
2104 }
2106 if (unselectedrepr == NULL) {
2107 if (stopinfo->draggable->fill_or_stroke) {
2108 sp_repr_css_unset_property (css, "fill");
2109 } else {
2110 sp_repr_css_unset_property (css, "stroke");
2111 }
2112 } else {
2113 SPCSSAttr *stopcss = sp_repr_css_attr(unselectedrepr, "style");
2114 if (stopinfo->draggable->fill_or_stroke) {
2115 sp_repr_css_set_property(css, "fill", sp_repr_css_property(stopcss, "stop-color", "inkscape:unset"));
2116 sp_repr_css_set_property(css, "fill-opacity", sp_repr_css_property(stopcss, "stop-opacity", "1"));
2117 } else {
2118 sp_repr_css_set_property(css, "stroke", sp_repr_css_property(stopcss, "stop-color", "inkscape:unset"));
2119 sp_repr_css_set_property(css, "stroke-opacity", sp_repr_css_property(stopcss, "stop-opacity", "1"));
2120 }
2121 sp_repr_css_attr_unref (stopcss);
2122 }
2124 sp_repr_css_change (SP_OBJECT_REPR (stopinfo->draggable->item), css, "style");
2125 sp_repr_css_attr_unref (css);
2126 }
2128 endstoplist = g_slist_remove(endstoplist, stopinfo);
2129 delete stopinfo;
2130 }
2132 if (document) {
2133 sp_document_done ( document, SP_VERB_CONTEXT_GRADIENT, _("Delete gradient stop(s)") );
2134 }
2135 }
2138 /*
2139 Local Variables:
2140 mode:c++
2141 c-file-style:"stroustrup"
2142 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
2143 indent-tabs-mode:nil
2144 fill-column:99
2145 End:
2146 */
2147 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4 :