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 "xml/repr.h"
31 #include "svg/css-ostringstream.h"
32 #include "svg/svg.h"
33 #include "libnr/nr-point-fns.h"
34 #include "prefs-utils.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
180 gr_drag_style_set (const SPCSSAttr *css, gpointer data)
181 {
182 GrDrag *drag = (GrDrag *) data;
184 if (!drag->selected)
185 return false;
187 SPCSSAttr *stop = sp_repr_css_attr_new ();
189 // See if the css contains interesting properties, and if so, translate them into the format
190 // acceptable for gradient stops
192 // any of color properties, in order of increasing priority:
193 if (css->attribute("flood-color"))
194 sp_repr_css_set_property (stop, "stop-color", css->attribute("flood-color"));
196 if (css->attribute("lighting-color"))
197 sp_repr_css_set_property (stop, "stop-color", css->attribute("lighting-color"));
199 if (css->attribute("color"))
200 sp_repr_css_set_property (stop, "stop-color", css->attribute("color"));
202 if (css->attribute("stroke") && strcmp(css->attribute("stroke"), "none"))
203 sp_repr_css_set_property (stop, "stop-color", css->attribute("stroke"));
205 if (css->attribute("fill") && strcmp(css->attribute("fill"), "none"))
206 sp_repr_css_set_property (stop, "stop-color", css->attribute("fill"));
208 if (css->attribute("stop-color"))
209 sp_repr_css_set_property (stop, "stop-color", css->attribute("stop-color"));
212 if (css->attribute("stop-opacity")) { // direct setting of stop-opacity has priority
213 sp_repr_css_set_property (stop, "stop-opacity", css->attribute("stop-opacity"));
214 } else { // multiply all opacity properties:
215 gdouble accumulated = 1.0;
216 accumulated *= sp_svg_read_percentage(css->attribute("flood-opacity"), 1.0);
217 accumulated *= sp_svg_read_percentage(css->attribute("opacity"), 1.0);
218 accumulated *= sp_svg_read_percentage(css->attribute("stroke-opacity"), 1.0);
219 accumulated *= sp_svg_read_percentage(css->attribute("fill-opacity"), 1.0);
221 Inkscape::CSSOStringStream os;
222 os << accumulated;
223 sp_repr_css_set_property (stop, "stop-opacity", os.str().c_str());
225 if ((css->attribute("fill") && !css->attribute("stroke") && !strcmp(css->attribute("fill"), "none")) ||
226 (css->attribute("stroke") && !css->attribute("fill") && !strcmp(css->attribute("stroke"), "none")))
227 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
228 }
230 if (!stop->attributeList()) { // nothing for us here, pass it on
231 sp_repr_css_attr_unref(stop);
232 return false;
233 }
235 for (GList const* sel = drag->selected; sel != NULL; sel = sel->next) { // for all selected draggers
236 GrDragger* dragger = (GrDragger*) sel->data;
237 for (GSList const* i = dragger->draggables; i != NULL; i = i->next) { // for all draggables of dragger
238 GrDraggable *draggable = (GrDraggable *) i->data;
240 drag->local_change = true;
241 sp_item_gradient_stop_set_style (draggable->item, draggable->point_type, draggable->point_i, draggable->fill_or_stroke, stop);
242 }
243 }
245 //sp_repr_css_print(stop);
246 sp_repr_css_attr_unref(stop);
247 return true;
248 }
250 guint32 GrDrag::getColor()
251 {
252 if (!selected) return 0;
254 float cf[4];
255 cf[0] = cf[1] = cf[2] = cf[3] = 0;
257 int count = 0;
259 for (GList *i = selected; i != NULL; i = i->next) { // for all selected draggers
260 GrDragger *d = (GrDragger *) i->data;
261 for (GSList const* j = d->draggables; j != NULL; j = j->next) { // for all draggables of dragger
262 GrDraggable *draggable = (GrDraggable *) j->data;
264 guint32 c = sp_item_gradient_stop_query_style (draggable->item, draggable->point_type, draggable->point_i, draggable->fill_or_stroke);
265 cf[0] += SP_RGBA32_R_F (c);
266 cf[1] += SP_RGBA32_G_F (c);
267 cf[2] += SP_RGBA32_B_F (c);
268 cf[3] += SP_RGBA32_A_F (c);
270 count ++;
271 }
272 }
274 if (count) {
275 cf[0] /= count;
276 cf[1] /= count;
277 cf[2] /= count;
278 cf[3] /= count;
279 }
281 return SP_RGBA32_F_COMPOSE(cf[0], cf[1], cf[2], cf[3]);
282 }
284 SPStop *
285 GrDrag::addStopNearPoint (SPItem *item, NR::Point mouse_p, double tolerance)
286 {
287 gfloat offset; // type of SPStop.offset = gfloat
288 SPGradient *gradient;
289 bool fill_or_stroke = true;
290 bool r1_knot = false;
292 bool addknot = false;
293 do {
294 gradient = sp_item_gradient (item, fill_or_stroke);
295 if (SP_IS_LINEARGRADIENT(gradient)) {
296 NR::Point begin = sp_item_gradient_get_coords(item, POINT_LG_BEGIN, 0, fill_or_stroke);
297 NR::Point end = sp_item_gradient_get_coords(item, POINT_LG_END, 0, fill_or_stroke);
299 NR::Point nearest = snap_vector_midpoint (mouse_p, begin, end, 0);
300 double dist_screen = NR::L2 (mouse_p - nearest);
301 if ( dist_screen < tolerance ) {
302 // add the knot
303 offset = get_offset_between_points(nearest, begin, end);
304 addknot = true;
305 break; // break out of the while loop: add only one knot
306 }
307 } else if (SP_IS_RADIALGRADIENT(gradient)) {
308 NR::Point begin = sp_item_gradient_get_coords(item, POINT_RG_CENTER, 0, fill_or_stroke);
309 NR::Point end = sp_item_gradient_get_coords(item, POINT_RG_R1, 0, fill_or_stroke);
310 NR::Point nearest = snap_vector_midpoint (mouse_p, begin, end, 0);
311 double dist_screen = NR::L2 (mouse_p - nearest);
312 if ( dist_screen < tolerance ) {
313 offset = get_offset_between_points(nearest, begin, end);
314 addknot = true;
315 r1_knot = true;
316 break; // break out of the while loop: add only one knot
317 }
319 end = sp_item_gradient_get_coords(item, POINT_RG_R2, 0, fill_or_stroke);
320 nearest = snap_vector_midpoint (mouse_p, begin, end, 0);
321 dist_screen = NR::L2 (mouse_p - nearest);
322 if ( dist_screen < tolerance ) {
323 offset = get_offset_between_points(nearest, begin, end);
324 addknot = true;
325 r1_knot = false;
326 break; // break out of the while loop: add only one knot
327 }
328 }
329 fill_or_stroke = !fill_or_stroke;
330 } while (!fill_or_stroke && !addknot) ;
332 if (addknot) {
333 SPGradient *vector = sp_gradient_get_forked_vector_if_necessary (gradient, false);
334 SPStop* prev_stop = sp_first_stop(vector);
335 SPStop* next_stop = sp_next_stop(prev_stop);
336 guint i = 1;
337 while ( (next_stop) && (next_stop->offset < offset) ) {
338 prev_stop = next_stop;
339 next_stop = sp_next_stop(next_stop);
340 i++;
341 }
342 if (!next_stop) {
343 // logical error: the endstop should have offset 1 and should always be more than this offset here
344 return NULL;
345 }
348 SPStop *newstop = sp_vector_add_stop (vector, prev_stop, next_stop, offset);
349 sp_gradient_ensure_vector (gradient);
350 updateDraggers();
352 return newstop;
353 }
355 return NULL;
356 }
359 bool
360 GrDrag::dropColor(SPItem */*item*/, gchar *c, NR::Point p)
361 {
362 // first, see if we can drop onto one of the existing draggers
363 for (GList *i = draggers; i != NULL; i = i->next) { // for all draggables of dragger
364 GrDragger *d = (GrDragger *) i->data;
366 if (NR::L2(p - d->point)*desktop->current_zoom() < 5) {
367 SPCSSAttr *stop = sp_repr_css_attr_new ();
368 sp_repr_css_set_property (stop, "stop-color", c);
369 sp_repr_css_set_property (stop, "stop-opacity", "1");
370 for (GSList *j = d->draggables; j != NULL; j = j->next) { // for all draggables of dragger
371 GrDraggable *draggable = (GrDraggable *) j->data;
372 local_change = true;
373 sp_item_gradient_stop_set_style (draggable->item, draggable->point_type, draggable->point_i, draggable->fill_or_stroke, stop);
374 }
375 sp_repr_css_attr_unref(stop);
376 return true;
377 }
378 }
380 // now see if we're over line and create a new stop
381 bool over_line = false;
382 SPCtrlLine *line = NULL;
383 if (lines) {
384 for (GSList *l = lines; (l != NULL) && (!over_line); l = l->next) {
385 line = (SPCtrlLine*) l->data;
386 NR::Point nearest = snap_vector_midpoint (p, line->s, line->e, 0);
387 double dist_screen = NR::L2 (p - nearest) * desktop->current_zoom();
388 if (line->item && dist_screen < 5) {
389 SPStop *stop = addStopNearPoint (line->item, p, 5/desktop->current_zoom());
390 if (stop) {
391 SPCSSAttr *css = sp_repr_css_attr_new ();
392 sp_repr_css_set_property (css, "stop-color", c);
393 sp_repr_css_set_property (css, "stop-opacity", "1");
394 sp_repr_css_change (SP_OBJECT_REPR (stop), css, "style");
395 return true;
396 }
397 }
398 }
399 }
401 return false;
402 }
405 GrDrag::GrDrag(SPDesktop *desktop) {
407 this->desktop = desktop;
409 this->selection = sp_desktop_selection(desktop);
411 this->draggers = NULL;
412 this->lines = NULL;
413 this->selected = NULL;
415 this->hor_levels.clear();
416 this->vert_levels.clear();
418 this->local_change = false;
420 this->sel_changed_connection = this->selection->connectChanged(
421 sigc::bind (
422 sigc::ptr_fun(&gr_drag_sel_changed),
423 (gpointer)this )
425 );
426 this->sel_modified_connection = this->selection->connectModified(
427 sigc::bind(
428 sigc::ptr_fun(&gr_drag_sel_modified),
429 (gpointer)this )
430 );
432 this->style_set_connection = this->desktop->connectSetStyle(
433 sigc::bind(
434 sigc::ptr_fun(&gr_drag_style_set),
435 (gpointer)this )
436 );
438 this->style_query_connection = this->desktop->connectQueryStyle(
439 sigc::bind(
440 sigc::ptr_fun(&gr_drag_style_query),
441 (gpointer)this )
442 );
444 this->updateDraggers ();
445 this->updateLines ();
446 this->updateLevels ();
448 if (desktop->gr_item) {
449 this->setSelected (getDraggerFor (desktop->gr_item, desktop->gr_point_type, desktop->gr_point_i, desktop->gr_fill_or_stroke));
450 }
451 }
453 GrDrag::~GrDrag()
454 {
455 this->sel_changed_connection.disconnect();
456 this->sel_modified_connection.disconnect();
457 this->style_set_connection.disconnect();
458 this->style_query_connection.disconnect();
460 if (this->selected) {
461 GrDraggable *draggable = (GrDraggable *) ((GrDragger*)this->selected->data)->draggables->data;
462 desktop->gr_item = draggable->item;
463 desktop->gr_point_type = draggable->point_type;
464 desktop->gr_point_i = draggable->point_i;
465 desktop->gr_fill_or_stroke = draggable->fill_or_stroke;
466 } else {
467 desktop->gr_item = NULL;
468 desktop->gr_point_type = 0;
469 desktop->gr_point_i = 0;
470 desktop->gr_fill_or_stroke = true;
471 }
473 deselect_all();
474 for (GList *l = this->draggers; l != NULL; l = l->next) {
475 delete ((GrDragger *) l->data);
476 }
477 g_list_free (this->draggers);
478 this->draggers = NULL;
479 this->selected = NULL;
481 for (GSList *l = this->lines; l != NULL; l = l->next) {
482 gtk_object_destroy( GTK_OBJECT (l->data));
483 }
484 g_slist_free (this->lines);
485 this->lines = NULL;
486 }
488 GrDraggable::GrDraggable (SPItem *item, guint point_type, guint point_i, bool fill_or_stroke)
489 {
490 this->item = item;
491 this->point_type = point_type;
492 this->point_i = point_i;
493 this->fill_or_stroke = fill_or_stroke;
495 g_object_ref (G_OBJECT (this->item));
496 }
498 GrDraggable::~GrDraggable ()
499 {
500 g_object_unref (G_OBJECT (this->item));
501 }
504 SPObject *
505 GrDraggable::getServer ()
506 {
507 if (!item)
508 return NULL;
510 SPObject *server = NULL;
511 if (fill_or_stroke)
512 server = SP_OBJECT_STYLE_FILL_SERVER (item);
513 else
514 server = SP_OBJECT_STYLE_STROKE_SERVER (item);
516 return server;
517 }
519 static void
520 gr_knot_moved_handler(SPKnot *knot, NR::Point const *ppointer, guint state, gpointer data)
521 {
522 GrDragger *dragger = (GrDragger *) data;
523 GrDrag *drag = dragger->parent;
525 NR::Point p = *ppointer;
527 // FIXME: take from prefs
528 double snap_dist = SNAP_DIST / dragger->parent->desktop->current_zoom();
530 if (state & GDK_SHIFT_MASK) {
531 // with Shift; unsnap if we carry more than one draggable
532 if (dragger->draggables && dragger->draggables->next) {
533 // create a new dragger
534 GrDragger *dr_new = new GrDragger (dragger->parent, dragger->point, NULL);
535 dragger->parent->draggers = g_list_prepend (dragger->parent->draggers, dr_new);
536 // relink to it all but the first draggable in the list
537 for (GSList const* i = dragger->draggables->next; i != NULL; i = i->next) {
538 GrDraggable *draggable = (GrDraggable *) i->data;
539 dr_new->addDraggable (draggable);
540 }
541 dr_new->updateKnotShape();
542 g_slist_free (dragger->draggables->next);
543 dragger->draggables->next = NULL;
544 dragger->updateKnotShape();
545 dragger->updateTip();
546 }
547 } else if (!(state & GDK_CONTROL_MASK)) {
548 // without Shift or Ctrl; see if we need to snap to another dragger
549 for (GList *di = dragger->parent->draggers; di != NULL; di = di->next) {
550 GrDragger *d_new = (GrDragger *) di->data;
551 if (dragger->mayMerge(d_new) && NR::L2 (d_new->point - p) < snap_dist) {
553 // Merge draggers:
554 for (GSList const* i = dragger->draggables; i != NULL; i = i->next) { // for all draggables of dragger
555 GrDraggable *draggable = (GrDraggable *) i->data;
556 // copy draggable to d_new:
557 GrDraggable *da_new = new GrDraggable (draggable->item, draggable->point_type, draggable->point_i, draggable->fill_or_stroke);
558 d_new->addDraggable (da_new);
559 }
561 // unlink and delete this dragger
562 dragger->parent->draggers = g_list_remove (dragger->parent->draggers, dragger);
563 delete dragger;
565 // update the new merged dragger
566 d_new->fireDraggables(true, false, true);
567 d_new->parent->updateLines();
568 d_new->parent->setSelected (d_new);
569 d_new->updateKnotShape ();
570 d_new->updateTip ();
571 d_new->updateDependencies(true);
572 sp_document_done (sp_desktop_document (d_new->parent->desktop), SP_VERB_CONTEXT_GRADIENT,
573 _("Merge gradient handles"));
574 return;
575 }
576 }
577 }
579 if (!((state & GDK_SHIFT_MASK) || ((state & GDK_CONTROL_MASK) && (state & GDK_MOD1_MASK)))) {
580 // Try snapping to the grid or guides
581 SPDesktop *desktop = dragger->parent->desktop;
582 SnapManager &m = desktop->namedview->snap_manager;
583 m.setup(desktop);
584 Inkscape::SnappedPoint s = m.freeSnap(Inkscape::Snapper::SNAPPOINT_NODE, p);
585 if (s.getSnapped()) {
586 p = s.getPoint();
587 sp_knot_moveto (knot, &p);
588 } else {
589 bool was_snapped = false;
590 double dist = NR_HUGE;
591 // No snapping so far, let's see if we need to snap to any of the levels
592 for (guint i = 0; i < dragger->parent->hor_levels.size(); i++) {
593 dist = fabs(p[NR::Y] - dragger->parent->hor_levels[i]);
594 if (dist < snap_dist) {
595 p[NR::Y] = dragger->parent->hor_levels[i];
596 s = Inkscape::SnappedPoint(p, Inkscape::SNAPTARGET_GRADIENT, dist, snap_dist, false);
597 was_snapped = true;
598 sp_knot_moveto (knot, &p);
599 }
600 }
601 for (guint i = 0; i < dragger->parent->vert_levels.size(); i++) {
602 dist = fabs(p[NR::X] - dragger->parent->vert_levels[i]);
603 if (dist < snap_dist) {
604 p[NR::X] = dragger->parent->vert_levels[i];
605 s = Inkscape::SnappedPoint(p, Inkscape::SNAPTARGET_GRADIENT, dist, snap_dist, false);
606 was_snapped = true;
607 sp_knot_moveto (knot, &p);
608 }
609 }
610 if (was_snapped) {
611 desktop->snapindicator->set_new_snappoint(s);
612 }
613 }
614 }
616 if (state & GDK_CONTROL_MASK) {
617 unsigned snaps = abs(prefs_get_int_attribute("options.rotationsnapsperpi", "value", 12));
618 /* 0 means no snapping. */
620 // This list will store snap vectors from all draggables of dragger
621 GSList *snap_vectors = NULL;
623 for (GSList const* i = dragger->draggables; i != NULL; i = i->next) {
624 GrDraggable *draggable = (GrDraggable *) i->data;
626 NR::Point *dr_snap = NULL;
628 if (draggable->point_type == POINT_LG_BEGIN || draggable->point_type == POINT_LG_END) {
629 for (GList *di = dragger->parent->draggers; di != NULL; di = di->next) {
630 GrDragger *d_new = (GrDragger *) di->data;
631 if (d_new == dragger)
632 continue;
633 if (d_new->isA (draggable->item,
634 draggable->point_type == POINT_LG_BEGIN? POINT_LG_END : POINT_LG_BEGIN,
635 draggable->fill_or_stroke)) {
636 // found the other end of the linear gradient;
637 if (state & GDK_SHIFT_MASK) {
638 // moving linear around center
639 NR::Point center = NR::Point (0.5*(d_new->point + dragger->point));
640 dr_snap = ¢er;
641 } else {
642 // moving linear around the other end
643 dr_snap = &d_new->point;
644 }
645 }
646 }
647 } else if (draggable->point_type == POINT_RG_R1 || draggable->point_type == POINT_RG_R2 || draggable->point_type == POINT_RG_FOCUS) {
648 for (GList *di = dragger->parent->draggers; di != NULL; di = di->next) {
649 GrDragger *d_new = (GrDragger *) di->data;
650 if (d_new == dragger)
651 continue;
652 if (d_new->isA (draggable->item,
653 POINT_RG_CENTER,
654 draggable->fill_or_stroke)) {
655 // found the center of the radial gradient;
656 dr_snap = &(d_new->point);
657 }
658 }
659 } else if (draggable->point_type == POINT_RG_CENTER) {
660 // radial center snaps to hor/vert relative to its original position
661 dr_snap = &(dragger->point_original);
662 }
664 NR::Point *snap_vector = NULL;
665 if (dr_snap) {
666 if (state & GDK_MOD1_MASK) {
667 // with Alt, snap to the original angle and its perpendiculars
668 snap_vector = get_snap_vector (p, *dr_snap, M_PI/2, NR::atan2 (dragger->point_original - *dr_snap));
669 } else {
670 // with Ctrl, snap to M_PI/snaps
671 snap_vector = get_snap_vector (p, *dr_snap, M_PI/snaps, 0);
672 }
673 }
674 if (snap_vector) {
675 snap_vectors = g_slist_prepend (snap_vectors, snap_vector);
676 }
677 }
679 // Move by the smallest of snap vectors:
680 NR::Point move(9999, 9999);
681 for (GSList const *i = snap_vectors; i != NULL; i = i->next) {
682 NR::Point *snap_vector = (NR::Point *) i->data;
683 if (NR::L2(*snap_vector) < NR::L2(move))
684 move = *snap_vector;
685 }
686 if (move[NR::X] < 9999) {
687 p += move;
688 sp_knot_moveto (knot, &p);
689 }
691 g_slist_free(snap_vectors);
692 }
694 drag->keep_selection = (bool) g_list_find(drag->selected, dragger);
695 bool scale_radial = (state & GDK_CONTROL_MASK) && (state & GDK_SHIFT_MASK);
697 if (drag->keep_selection) {
698 NR::Point diff = p - dragger->point;
699 drag->selected_move_nowrite (diff[NR::X], diff[NR::Y], scale_radial);
700 } else {
701 dragger->point = p;
702 dragger->fireDraggables (false, scale_radial);
703 dragger->updateDependencies(false);
704 }
706 }
709 static void
710 gr_midpoint_limits(GrDragger *dragger, SPObject *server, NR::Point *begin, NR::Point *end, NR::Point *low_lim, NR::Point *high_lim, GSList **moving)
711 {
713 GrDrag *drag = dragger->parent;
714 // a midpoint dragger can (logically) only contain one GrDraggable
715 GrDraggable *draggable = (GrDraggable *) dragger->draggables->data;
717 // get begin and end points between which dragging is allowed:
718 // the draglimits are between knot(lowest_i - 1) and knot(highest_i + 1)
719 *moving = g_slist_append(*moving, dragger);
721 guint lowest_i = draggable->point_i;
722 guint highest_i = draggable->point_i;
723 GrDragger *lowest_dragger = dragger;
724 GrDragger *highest_dragger = dragger;
725 if (dragger->isSelected()) {
726 GrDragger* d_add;
727 while ( true )
728 {
729 d_add = drag->getDraggerFor(draggable->item, draggable->point_type, lowest_i - 1, draggable->fill_or_stroke);
730 if ( d_add && g_list_find(drag->selected, d_add) ) {
731 lowest_i = lowest_i - 1;
732 *moving = g_slist_prepend(*moving, d_add);
733 lowest_dragger = d_add;
734 } else {
735 break;
736 }
737 }
739 while ( true )
740 {
741 d_add = drag->getDraggerFor(draggable->item, draggable->point_type, highest_i + 1, draggable->fill_or_stroke);
742 if ( d_add && g_list_find(drag->selected, d_add) ) {
743 highest_i = highest_i + 1;
744 *moving = g_slist_append(*moving, d_add);
745 highest_dragger = d_add;
746 } else {
747 break;
748 }
749 }
750 }
752 if ( SP_IS_LINEARGRADIENT(server) ) {
753 guint num = SP_LINEARGRADIENT(server)->vector.stops.size();
754 GrDragger *d_temp;
755 if (lowest_i == 1) {
756 d_temp = drag->getDraggerFor (draggable->item, POINT_LG_BEGIN, 0, draggable->fill_or_stroke);
757 } else {
758 d_temp = drag->getDraggerFor (draggable->item, POINT_LG_MID, lowest_i - 1, draggable->fill_or_stroke);
759 }
760 if (d_temp)
761 *begin = d_temp->point;
763 d_temp = drag->getDraggerFor (draggable->item, POINT_LG_MID, highest_i + 1, draggable->fill_or_stroke);
764 if (d_temp == NULL) {
765 d_temp = drag->getDraggerFor (draggable->item, POINT_LG_END, num-1, draggable->fill_or_stroke);
766 }
767 if (d_temp)
768 *end = d_temp->point;
769 } else if ( SP_IS_RADIALGRADIENT(server) ) {
770 guint num = SP_RADIALGRADIENT(server)->vector.stops.size();
771 GrDragger *d_temp;
772 if (lowest_i == 1) {
773 d_temp = drag->getDraggerFor (draggable->item, POINT_RG_CENTER, 0, draggable->fill_or_stroke);
774 } else {
775 d_temp = drag->getDraggerFor (draggable->item, draggable->point_type, lowest_i - 1, draggable->fill_or_stroke);
776 }
777 if (d_temp)
778 *begin = d_temp->point;
780 d_temp = drag->getDraggerFor (draggable->item, draggable->point_type, highest_i + 1, draggable->fill_or_stroke);
781 if (d_temp == NULL) {
782 d_temp = drag->getDraggerFor (draggable->item, (draggable->point_type==POINT_RG_MID1) ? POINT_RG_R1 : POINT_RG_R2, num-1, draggable->fill_or_stroke);
783 }
784 if (d_temp)
785 *end = d_temp->point;
786 }
788 *low_lim = dragger->point - (lowest_dragger->point - *begin);
789 *high_lim = dragger->point - (highest_dragger->point - *end);
790 }
794 /**
795 Called when a midpoint knot is dragged.
796 */
797 static void
798 gr_knot_moved_midpoint_handler(SPKnot */*knot*/, NR::Point const *ppointer, guint state, gpointer data)
799 {
800 GrDragger *dragger = (GrDragger *) data;
801 GrDrag *drag = dragger->parent;
802 // a midpoint dragger can (logically) only contain one GrDraggable
803 GrDraggable *draggable = (GrDraggable *) dragger->draggables->data;
805 // FIXME: take from prefs
806 double snap_fraction = 0.1;
808 NR::Point p = *ppointer;
809 NR::Point begin(0,0), end(0,0);
810 NR::Point low_lim(0,0), high_lim(0,0);
812 SPObject *server = draggable->getServer();
814 GSList *moving = NULL;
815 gr_midpoint_limits(dragger, server, &begin, &end, &low_lim, &high_lim, &moving);
817 if (state & GDK_CONTROL_MASK) {
818 p = snap_vector_midpoint (p, low_lim, high_lim, snap_fraction);
819 } else {
820 p = snap_vector_midpoint (p, low_lim, high_lim, 0);
821 }
822 NR::Point displacement = p - dragger->point;
824 for (GSList const* i = moving; i != NULL; i = i->next) {
825 GrDragger *drg = (GrDragger*) i->data;
826 SPKnot *drgknot = drg->knot;
827 NR::Point this_move = displacement;
828 if (state & GDK_MOD1_MASK) {
829 // FIXME: unify all these profiles (here, in nodepath, in tweak) in one place
830 double alpha = 1.0;
831 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
832 double x = NR::L2(drg->point - dragger->point)/NR::L2(end - dragger->point);
833 this_move = (0.5 * cos (M_PI * (pow(x, alpha))) + 0.5) * this_move;
834 } else { // drg is on the begin side from dragger
835 double x = NR::L2(drg->point - dragger->point)/NR::L2(begin - dragger->point);
836 this_move = (0.5 * cos (M_PI * (pow(x, alpha))) + 0.5) * this_move;
837 }
838 }
839 drg->point += this_move;
840 sp_knot_moveto (drgknot, & drg->point);
841 drg->fireDraggables (false);
842 drg->updateDependencies(false);
843 }
845 g_slist_free(moving);
847 drag->keep_selection = dragger->isSelected();
848 }
852 static void
853 gr_knot_grabbed_handler (SPKnot */*knot*/, unsigned int /*state*/, gpointer data)
854 {
855 GrDragger *dragger = (GrDragger *) data;
857 sp_canvas_force_full_redraw_after_interruptions(dragger->parent->desktop->canvas, 5);
858 }
860 /**
861 Called when the mouse releases a dragger knot; changes gradient writing to repr, updates other draggers if needed
862 */
863 static void
864 gr_knot_ungrabbed_handler (SPKnot *knot, unsigned int state, gpointer data)
865 {
866 GrDragger *dragger = (GrDragger *) data;
868 sp_canvas_end_forced_full_redraws(dragger->parent->desktop->canvas);
870 dragger->point_original = dragger->point = knot->pos;
872 if ((state & GDK_CONTROL_MASK) && (state & GDK_SHIFT_MASK)) {
873 dragger->fireDraggables (true, true);
874 } else {
875 dragger->fireDraggables (true);
876 }
878 for (GList *i = dragger->parent->selected; i != NULL; i = i->next) {
879 GrDragger *d = (GrDragger *) i->data;
880 if (d == dragger)
881 continue;
882 d->fireDraggables (true);
883 }
885 // make this dragger selected
886 if (!dragger->parent->keep_selection) {
887 dragger->parent->setSelected (dragger);
888 }
889 dragger->parent->keep_selection = false;
891 dragger->updateDependencies(true);
893 // we did an undoable action
894 sp_document_done (sp_desktop_document (dragger->parent->desktop), SP_VERB_CONTEXT_GRADIENT,
895 _("Move gradient handle"));
896 }
898 /**
899 Called when a dragger knot is clicked; selects the dragger or deletes it depending on the
900 state of the keyboard keys
901 */
902 static void
903 gr_knot_clicked_handler(SPKnot */*knot*/, guint state, gpointer data)
904 {
905 GrDragger *dragger = (GrDragger *) data;
906 GrDraggable *draggable = (GrDraggable *) dragger->draggables->data;
907 if (!draggable) return;
909 if ( (state & GDK_CONTROL_MASK) && (state & GDK_MOD1_MASK ) ) {
910 // delete this knot from vector
911 SPGradient *gradient = sp_item_gradient (draggable->item, draggable->fill_or_stroke);
912 gradient = sp_gradient_get_vector (gradient, false);
913 if (gradient->vector.stops.size() > 2) { // 2 is the minimum
914 SPStop *stop = NULL;
915 switch (draggable->point_type) { // if we delete first or last stop, move the next/previous to the edge
916 case POINT_LG_BEGIN:
917 case POINT_RG_CENTER:
918 stop = sp_first_stop(gradient);
919 {
920 SPStop *next = sp_next_stop (stop);
921 if (next) {
922 next->offset = 0;
923 sp_repr_set_css_double (SP_OBJECT_REPR (next), "offset", 0);
924 }
925 }
926 break;
927 case POINT_LG_END:
928 case POINT_RG_R1:
929 case POINT_RG_R2:
930 stop = sp_last_stop(gradient);
931 {
932 SPStop *prev = sp_prev_stop (stop, gradient);
933 if (prev) {
934 prev->offset = 1;
935 sp_repr_set_css_double (SP_OBJECT_REPR (prev), "offset", 1);
936 }
937 }
938 break;
939 case POINT_LG_MID:
940 case POINT_RG_MID1:
941 case POINT_RG_MID2:
942 stop = sp_get_stop_i(gradient, draggable->point_i);
943 break;
944 }
946 SP_OBJECT_REPR(gradient)->removeChild(SP_OBJECT_REPR(stop));
947 sp_document_done (SP_OBJECT_DOCUMENT (gradient), SP_VERB_CONTEXT_GRADIENT,
948 _("Delete gradient stop"));
949 }
950 } else {
951 // select the dragger
952 dragger->point_original = dragger->point;
954 if ( state & GDK_SHIFT_MASK ) {
955 dragger->parent->setSelected (dragger, true, false);
956 } else {
957 dragger->parent->setSelected (dragger);
958 }
959 }
960 }
962 /**
963 Called when a dragger knot is doubleclicked; opens gradient editor with the stop from the first draggable
964 */
965 static void
966 gr_knot_doubleclicked_handler (SPKnot */*knot*/, guint /*state*/, gpointer data)
967 {
968 GrDragger *dragger = (GrDragger *) data;
970 dragger->point_original = dragger->point;
972 if (dragger->draggables == NULL)
973 return;
975 GrDraggable *draggable = (GrDraggable *) dragger->draggables->data;
976 sp_item_gradient_edit_stop (draggable->item, draggable->point_type, draggable->point_i, draggable->fill_or_stroke);
977 }
979 /**
980 Act upon all draggables of the dragger, setting them to the dragger's point
981 */
982 void
983 GrDragger::fireDraggables (bool write_repr, bool scale_radial, bool merging_focus)
984 {
985 for (GSList const* i = this->draggables; i != NULL; i = i->next) {
986 GrDraggable *draggable = (GrDraggable *) i->data;
988 // set local_change flag so that selection_changed callback does not regenerate draggers
989 this->parent->local_change = true;
991 // change gradient, optionally writing to repr; prevent focus from moving if it's snapped
992 // to the center, unless it's the first update upon merge when we must snap it to the point
993 if (merging_focus ||
994 !(draggable->point_type == POINT_RG_FOCUS && this->isA(draggable->item, POINT_RG_CENTER, draggable->point_i, draggable->fill_or_stroke)))
995 {
996 sp_item_gradient_set_coords (draggable->item, draggable->point_type, draggable->point_i, this->point, draggable->fill_or_stroke, write_repr, scale_radial);
997 }
998 }
999 }
1001 /**
1002 Checks if the dragger has a draggable with this point_type
1003 */
1004 bool
1005 GrDragger::isA (gint point_type)
1006 {
1007 for (GSList const* i = this->draggables; i != NULL; i = i->next) {
1008 GrDraggable *draggable = (GrDraggable *) i->data;
1009 if (draggable->point_type == point_type) {
1010 return true;
1011 }
1012 }
1013 return false;
1014 }
1016 /**
1017 Checks if the dragger has a draggable with this item, point_type + point_i (number), fill_or_stroke
1018 */
1019 bool
1020 GrDragger::isA (SPItem *item, gint point_type, gint point_i, bool fill_or_stroke)
1021 {
1022 for (GSList const* i = this->draggables; i != NULL; i = i->next) {
1023 GrDraggable *draggable = (GrDraggable *) i->data;
1024 if ( (draggable->point_type == point_type) && (draggable->point_i == point_i) && (draggable->item == item) && (draggable->fill_or_stroke == fill_or_stroke) ) {
1025 return true;
1026 }
1027 }
1028 return false;
1029 }
1031 /**
1032 Checks if the dragger has a draggable with this item, point_type, fill_or_stroke
1033 */
1034 bool
1035 GrDragger::isA (SPItem *item, gint point_type, bool fill_or_stroke)
1036 {
1037 for (GSList const* i = this->draggables; i != NULL; i = i->next) {
1038 GrDraggable *draggable = (GrDraggable *) i->data;
1039 if ( (draggable->point_type == point_type) && (draggable->item == item) && (draggable->fill_or_stroke == fill_or_stroke) ) {
1040 return true;
1041 }
1042 }
1043 return false;
1044 }
1046 bool
1047 GrDraggable::mayMerge (GrDraggable *da2)
1048 {
1049 if ((this->item == da2->item) && (this->fill_or_stroke == da2->fill_or_stroke)) {
1050 // we must not merge the points of the same gradient!
1051 if (!((this->point_type == POINT_RG_FOCUS && da2->point_type == POINT_RG_CENTER) ||
1052 (this->point_type == POINT_RG_CENTER && da2->point_type == POINT_RG_FOCUS))) {
1053 // except that we can snap center and focus together
1054 return false;
1055 }
1056 }
1057 // disable merging of midpoints.
1058 if ( (this->point_type == POINT_LG_MID) || (da2->point_type == POINT_LG_MID)
1059 || (this->point_type == POINT_RG_MID1) || (da2->point_type == POINT_RG_MID1)
1060 || (this->point_type == POINT_RG_MID2) || (da2->point_type == POINT_RG_MID2) )
1061 return false;
1063 return true;
1064 }
1066 bool
1067 GrDragger::mayMerge (GrDragger *other)
1068 {
1069 if (this == other)
1070 return false;
1072 for (GSList const* i = this->draggables; i != NULL; i = i->next) { // for all draggables of this
1073 GrDraggable *da1 = (GrDraggable *) i->data;
1074 for (GSList const* j = other->draggables; j != NULL; j = j->next) { // for all draggables of other
1075 GrDraggable *da2 = (GrDraggable *) j->data;
1076 if (!da1->mayMerge(da2))
1077 return false;
1078 }
1079 }
1080 return true;
1081 }
1083 bool
1084 GrDragger::mayMerge (GrDraggable *da2)
1085 {
1086 for (GSList const* i = this->draggables; i != NULL; i = i->next) { // for all draggables of this
1087 GrDraggable *da1 = (GrDraggable *) i->data;
1088 if (!da1->mayMerge(da2))
1089 return false;
1090 }
1091 return true;
1092 }
1094 /**
1095 Updates the statusbar tip of the dragger knot, based on its draggables
1096 */
1097 void
1098 GrDragger::updateTip ()
1099 {
1100 if (this->knot && this->knot->tip) {
1101 g_free (this->knot->tip);
1102 this->knot->tip = NULL;
1103 }
1105 if (g_slist_length (this->draggables) == 1) {
1106 GrDraggable *draggable = (GrDraggable *) this->draggables->data;
1107 char *item_desc = sp_item_description(draggable->item);
1108 switch (draggable->point_type) {
1109 case POINT_LG_MID:
1110 case POINT_RG_MID1:
1111 case POINT_RG_MID2:
1112 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"),
1113 _(gr_knot_descr[draggable->point_type]),
1114 draggable->point_i,
1115 item_desc,
1116 draggable->fill_or_stroke == false ? _(" (stroke)") : "");
1117 break;
1119 default:
1120 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"),
1121 _(gr_knot_descr[draggable->point_type]),
1122 item_desc,
1123 draggable->fill_or_stroke == false ? _(" (stroke)") : "");
1124 break;
1125 }
1126 g_free(item_desc);
1127 } else if (g_slist_length (draggables) == 2 && isA (POINT_RG_CENTER) && isA (POINT_RG_FOCUS)) {
1128 this->knot->tip = g_strdup_printf (_("Radial gradient <b>center</b> and <b>focus</b>; drag with <b>Shift</b> to separate focus"));
1129 } else {
1130 int length = g_slist_length (this->draggables);
1131 this->knot->tip = g_strdup_printf (ngettext("Gradient point shared by <b>%d</b> gradient; drag with <b>Shift</b> to separate",
1132 "Gradient point shared by <b>%d</b> gradients; drag with <b>Shift</b> to separate",
1133 length),
1134 length);
1135 }
1136 }
1138 /**
1139 Adds a draggable to the dragger
1140 */
1141 void
1142 GrDragger::updateKnotShape ()
1143 {
1144 if (!draggables)
1145 return;
1146 GrDraggable *last = (GrDraggable *) g_slist_last(draggables)->data;
1147 g_object_set (G_OBJECT (this->knot->item), "shape", gr_knot_shapes[last->point_type], NULL);
1148 }
1150 /**
1151 Adds a draggable to the dragger
1152 */
1153 void
1154 GrDragger::addDraggable (GrDraggable *draggable)
1155 {
1156 this->draggables = g_slist_prepend (this->draggables, draggable);
1158 this->updateTip();
1159 }
1162 /**
1163 Moves this dragger to the point of the given draggable, acting upon all other draggables
1164 */
1165 void
1166 GrDragger::moveThisToDraggable (SPItem *item, gint point_type, gint point_i, bool fill_or_stroke, bool write_repr)
1167 {
1168 this->point = sp_item_gradient_get_coords (item, point_type, point_i, fill_or_stroke);
1169 this->point_original = this->point;
1171 sp_knot_moveto (this->knot, &(this->point));
1173 for (GSList const* i = this->draggables; i != NULL; i = i->next) {
1174 GrDraggable *da = (GrDraggable *) i->data;
1175 if ( (da->item == item) &&
1176 (point_type == -1 || da->point_type == point_type) &&
1177 (point_i == -1 || da->point_i == point_i) &&
1178 (da->fill_or_stroke == fill_or_stroke) ) {
1179 continue;
1180 }
1181 sp_item_gradient_set_coords (da->item, da->point_type, da->point_i, this->point, da->fill_or_stroke, write_repr, false);
1182 }
1183 // FIXME: here we should also call this->updateDependencies(write_repr); to propagate updating, but how to prevent loops?
1184 }
1187 /**
1188 Moves all midstop draggables that depend on this one
1189 */
1190 void
1191 GrDragger::updateMidstopDependencies (GrDraggable *draggable, bool write_repr) {
1192 SPObject *server = draggable->getServer();
1193 if (!server)
1194 return;
1195 guint num = SP_GRADIENT(server)->vector.stops.size();
1196 if (num <= 2) return;
1198 if ( SP_IS_LINEARGRADIENT(server) ) {
1199 for ( guint i = 1; i < num - 1; i++ ) {
1200 this->moveOtherToDraggable (draggable->item, POINT_LG_MID, i, draggable->fill_or_stroke, write_repr);
1201 }
1202 } else if ( SP_IS_RADIALGRADIENT(server) ) {
1203 for ( guint i = 1; i < num - 1; i++ ) {
1204 this->moveOtherToDraggable (draggable->item, POINT_RG_MID1, i, draggable->fill_or_stroke, write_repr);
1205 this->moveOtherToDraggable (draggable->item, POINT_RG_MID2, i, draggable->fill_or_stroke, write_repr);
1206 }
1207 }
1208 }
1211 /**
1212 Moves all draggables that depend on this one
1213 */
1214 void
1215 GrDragger::updateDependencies (bool write_repr)
1216 {
1217 for (GSList const* i = this->draggables; i != NULL; i = i->next) {
1218 GrDraggable *draggable = (GrDraggable *) i->data;
1219 switch (draggable->point_type) {
1220 case POINT_LG_BEGIN:
1221 {
1222 // the end point is dependent only when dragging with ctrl+shift
1223 this->moveOtherToDraggable (draggable->item, POINT_LG_END, -1, draggable->fill_or_stroke, write_repr);
1225 this->updateMidstopDependencies (draggable, write_repr);
1226 }
1227 break;
1228 case POINT_LG_END:
1229 {
1230 // the begin point is dependent only when dragging with ctrl+shift
1231 this->moveOtherToDraggable (draggable->item, POINT_LG_BEGIN, 0, draggable->fill_or_stroke, write_repr);
1233 this->updateMidstopDependencies (draggable, write_repr);
1234 }
1235 break;
1236 case POINT_LG_MID:
1237 // no other nodes depend on mid points.
1238 break;
1239 case POINT_RG_R2:
1240 this->moveOtherToDraggable (draggable->item, POINT_RG_R1, -1, draggable->fill_or_stroke, write_repr);
1241 this->moveOtherToDraggable (draggable->item, POINT_RG_FOCUS, -1, draggable->fill_or_stroke, write_repr);
1242 this->updateMidstopDependencies (draggable, write_repr);
1243 break;
1244 case POINT_RG_R1:
1245 this->moveOtherToDraggable (draggable->item, POINT_RG_R2, -1, draggable->fill_or_stroke, write_repr);
1246 this->moveOtherToDraggable (draggable->item, POINT_RG_FOCUS, -1, draggable->fill_or_stroke, write_repr);
1247 this->updateMidstopDependencies (draggable, write_repr);
1248 break;
1249 case POINT_RG_CENTER:
1250 this->moveOtherToDraggable (draggable->item, POINT_RG_R1, -1, draggable->fill_or_stroke, write_repr);
1251 this->moveOtherToDraggable (draggable->item, POINT_RG_R2, -1, draggable->fill_or_stroke, write_repr);
1252 this->moveOtherToDraggable (draggable->item, POINT_RG_FOCUS, -1, draggable->fill_or_stroke, write_repr);
1253 this->updateMidstopDependencies (draggable, write_repr);
1254 break;
1255 case POINT_RG_FOCUS:
1256 // nothing can depend on that
1257 break;
1258 case POINT_RG_MID1:
1259 this->moveOtherToDraggable (draggable->item, POINT_RG_MID2, draggable->point_i, draggable->fill_or_stroke, write_repr);
1260 break;
1261 case POINT_RG_MID2:
1262 this->moveOtherToDraggable (draggable->item, POINT_RG_MID1, draggable->point_i, draggable->fill_or_stroke, write_repr);
1263 break;
1264 default:
1265 break;
1266 }
1267 }
1268 }
1272 GrDragger::GrDragger (GrDrag *parent, NR::Point p, GrDraggable *draggable)
1273 {
1274 this->draggables = NULL;
1276 this->parent = parent;
1278 this->point = p;
1279 this->point_original = p;
1281 // create the knot
1282 this->knot = sp_knot_new (parent->desktop, NULL);
1283 this->knot->setMode(SP_KNOT_MODE_XOR);
1284 this->knot->setFill(GR_KNOT_COLOR_NORMAL, GR_KNOT_COLOR_MOUSEOVER, GR_KNOT_COLOR_MOUSEOVER);
1285 this->knot->setStroke(0x000000ff, 0x000000ff, 0x000000ff);
1286 sp_knot_update_ctrl(this->knot);
1288 // move knot to the given point
1289 sp_knot_set_position (this->knot, &p, SP_KNOT_STATE_NORMAL);
1290 sp_knot_show (this->knot);
1292 // connect knot's signals
1293 if ( (draggable) // it can be NULL if a node in unsnapped (eg. focus point unsnapped from center)
1294 // luckily, midstops never snap to other nodes so are never unsnapped...
1295 && ( (draggable->point_type == POINT_LG_MID)
1296 || (draggable->point_type == POINT_RG_MID1)
1297 || (draggable->point_type == POINT_RG_MID2) ) )
1298 {
1299 this->handler_id = g_signal_connect (G_OBJECT (this->knot), "moved", G_CALLBACK (gr_knot_moved_midpoint_handler), this);
1300 } else {
1301 this->handler_id = g_signal_connect (G_OBJECT (this->knot), "moved", G_CALLBACK (gr_knot_moved_handler), this);
1302 }
1303 g_signal_connect (G_OBJECT (this->knot), "clicked", G_CALLBACK (gr_knot_clicked_handler), this);
1304 g_signal_connect (G_OBJECT (this->knot), "doubleclicked", G_CALLBACK (gr_knot_doubleclicked_handler), this);
1305 g_signal_connect (G_OBJECT (this->knot), "grabbed", G_CALLBACK (gr_knot_grabbed_handler), this);
1306 g_signal_connect (G_OBJECT (this->knot), "ungrabbed", G_CALLBACK (gr_knot_ungrabbed_handler), this);
1308 // add the initial draggable
1309 if (draggable)
1310 this->addDraggable (draggable);
1311 updateKnotShape();
1312 }
1314 GrDragger::~GrDragger ()
1315 {
1316 // unselect if it was selected
1317 this->parent->setDeselected(this);
1319 // disconnect signals
1320 g_signal_handlers_disconnect_by_func(G_OBJECT(this->knot), (gpointer) G_CALLBACK (gr_knot_moved_handler), this);
1321 g_signal_handlers_disconnect_by_func(G_OBJECT(this->knot), (gpointer) G_CALLBACK (gr_knot_clicked_handler), this);
1322 g_signal_handlers_disconnect_by_func(G_OBJECT(this->knot), (gpointer) G_CALLBACK (gr_knot_doubleclicked_handler), this);
1323 g_signal_handlers_disconnect_by_func(G_OBJECT(this->knot), (gpointer) G_CALLBACK (gr_knot_grabbed_handler), this);
1324 g_signal_handlers_disconnect_by_func(G_OBJECT(this->knot), (gpointer) G_CALLBACK (gr_knot_ungrabbed_handler), this);
1326 /* unref should call destroy */
1327 g_object_unref (G_OBJECT (this->knot));
1329 // delete all draggables
1330 for (GSList const* i = this->draggables; i != NULL; i = i->next) {
1331 delete ((GrDraggable *) i->data);
1332 }
1333 g_slist_free (this->draggables);
1334 this->draggables = NULL;
1335 }
1337 /**
1338 Select the dragger which has the given draggable.
1339 */
1340 GrDragger *
1341 GrDrag::getDraggerFor (SPItem *item, gint point_type, gint point_i, bool fill_or_stroke)
1342 {
1343 for (GList const* i = this->draggers; i != NULL; i = i->next) {
1344 GrDragger *dragger = (GrDragger *) i->data;
1345 for (GSList const* j = dragger->draggables; j != NULL; j = j->next) {
1346 GrDraggable *da2 = (GrDraggable *) j->data;
1347 if ( (da2->item == item) &&
1348 (point_type == -1 || da2->point_type == point_type) && // -1 means this does not matter
1349 (point_i == -1 || da2->point_i == point_i) && // -1 means this does not matter
1350 (da2->fill_or_stroke == fill_or_stroke)) {
1351 return (dragger);
1352 }
1353 }
1354 }
1355 return NULL;
1356 }
1359 void
1360 GrDragger::moveOtherToDraggable (SPItem *item, gint point_type, gint point_i, bool fill_or_stroke, bool write_repr)
1361 {
1362 GrDragger *d = this->parent->getDraggerFor (item, point_type, point_i, fill_or_stroke);
1363 if (d && d != this) {
1364 d->moveThisToDraggable (item, point_type, point_i, fill_or_stroke, write_repr);
1365 }
1366 }
1369 /**
1370 Draw this dragger as selected
1371 */
1372 void
1373 GrDragger::select()
1374 {
1375 this->knot->fill [SP_KNOT_STATE_NORMAL] = GR_KNOT_COLOR_SELECTED;
1376 g_object_set (G_OBJECT (this->knot->item), "fill_color", GR_KNOT_COLOR_SELECTED, NULL);
1377 }
1379 /**
1380 Draw this dragger as normal (deselected)
1381 */
1382 void
1383 GrDragger::deselect()
1384 {
1385 this->knot->fill [SP_KNOT_STATE_NORMAL] = GR_KNOT_COLOR_NORMAL;
1386 g_object_set (G_OBJECT (this->knot->item), "fill_color", GR_KNOT_COLOR_NORMAL, NULL);
1387 }
1389 bool
1390 GrDragger::isSelected()
1391 {
1392 return g_list_find (parent->selected, this);
1393 }
1395 /**
1396 \brief Deselect all stops/draggers (private)
1397 */
1398 void
1399 GrDrag::deselect_all()
1400 {
1401 while (selected) {
1402 ( (GrDragger*) selected->data)->deselect();
1403 selected = g_list_remove(selected, selected->data);
1404 }
1405 }
1407 /**
1408 \brief Deselect all stops/draggers (public; emits signal)
1409 */
1410 void
1411 GrDrag::deselectAll()
1412 {
1413 deselect_all();
1414 this->desktop->emitToolSubselectionChanged(NULL);
1415 }
1417 /**
1418 \brief Select all stops/draggers
1419 */
1420 void
1421 GrDrag::selectAll()
1422 {
1423 for (GList *l = this->draggers; l != NULL; l = l->next) {
1424 GrDragger *d = ((GrDragger *) l->data);
1425 setSelected (d, true, true);
1426 }
1427 }
1429 /**
1430 \brief Select all stops/draggers that match the coords
1431 */
1432 void
1433 GrDrag::selectByCoords(std::vector<NR::Point> coords)
1434 {
1435 for (GList *l = this->draggers; l != NULL; l = l->next) {
1436 GrDragger *d = ((GrDragger *) l->data);
1437 for (guint k = 0; k < coords.size(); k++) {
1438 if (NR::L2 (d->point - coords[k]) < 1e-4) {
1439 setSelected (d, true, true);
1440 }
1441 }
1442 }
1443 }
1446 /**
1447 \brief Select all stops/draggers that fall within the rect
1448 */
1449 void
1450 GrDrag::selectRect(NR::Rect const &r)
1451 {
1452 for (GList *l = this->draggers; l != NULL; l = l->next) {
1453 GrDragger *d = ((GrDragger *) l->data);
1454 if (r.contains(d->point)) {
1455 setSelected (d, true, true);
1456 }
1457 }
1458 }
1460 /**
1461 \brief Select a dragger
1462 \param dragger The dragger to select
1463 \param add_to_selection If true, add to selection, otherwise deselect others
1464 \param override If true, always select this node, otherwise toggle selected status
1465 */
1466 void
1467 GrDrag::setSelected (GrDragger *dragger, bool add_to_selection, bool override)
1468 {
1469 GrDragger *seldragger = NULL;
1471 if (add_to_selection) {
1472 if (!dragger) return;
1473 if (override) {
1474 if (!g_list_find(selected, dragger)) {
1475 selected = g_list_prepend(selected, dragger);
1476 }
1477 dragger->select();
1478 seldragger = dragger;
1479 } else { // toggle
1480 if (g_list_find(selected, dragger)) {
1481 selected = g_list_remove(selected, dragger);
1482 dragger->deselect();
1483 if (selected) {
1484 seldragger = (GrDragger*) selected->data; // select the dragger that is first in the list
1485 }
1486 } else {
1487 selected = g_list_prepend(selected, dragger);
1488 dragger->select();
1489 seldragger = dragger;
1490 }
1491 }
1492 } else {
1493 deselect_all();
1494 if (dragger) {
1495 selected = g_list_prepend(selected, dragger);
1496 dragger->select();
1497 seldragger = dragger;
1498 }
1499 }
1500 if (seldragger) {
1501 this->desktop->emitToolSubselectionChanged((gpointer) seldragger);
1502 }
1503 }
1505 /**
1506 \brief Deselect a dragger
1507 \param dragger The dragger to deselect
1508 */
1509 void
1510 GrDrag::setDeselected (GrDragger *dragger)
1511 {
1512 if (g_list_find(selected, dragger)) {
1513 selected = g_list_remove(selected, dragger);
1514 dragger->deselect();
1515 }
1516 this->desktop->emitToolSubselectionChanged((gpointer) (selected ? selected->data : NULL ));
1517 }
1521 /**
1522 Create a line from p1 to p2 and add it to the lines list
1523 */
1524 void
1525 GrDrag::addLine (SPItem *item, NR::Point p1, NR::Point p2, guint32 rgba)
1526 {
1527 SPCanvasItem *line = sp_canvas_item_new(sp_desktop_controls(this->desktop),
1528 SP_TYPE_CTRLLINE, NULL);
1529 SP_CTRLLINE(line)->item = item;
1530 sp_ctrlline_set_coords(SP_CTRLLINE(line), p1, p2);
1531 if (rgba != GR_LINE_COLOR_FILL) // fill is the default, so don't set color for it to speed up redraw
1532 sp_ctrlline_set_rgba32 (SP_CTRLLINE(line), rgba);
1533 sp_canvas_item_show (line);
1534 this->lines = g_slist_append (this->lines, line);
1535 }
1537 /**
1538 If there already exists a dragger within MERGE_DIST of p, add the draggable to it; otherwise create
1539 new dragger and add it to draggers list
1540 */
1541 void
1542 GrDrag::addDragger (GrDraggable *draggable)
1543 {
1544 NR::Point p = sp_item_gradient_get_coords (draggable->item, draggable->point_type, draggable->point_i, draggable->fill_or_stroke);
1546 for (GList *i = this->draggers; i != NULL; i = i->next) {
1547 GrDragger *dragger = (GrDragger *) i->data;
1548 if (dragger->mayMerge (draggable) && NR::L2 (dragger->point - p) < MERGE_DIST) {
1549 // distance is small, merge this draggable into dragger, no need to create new dragger
1550 dragger->addDraggable (draggable);
1551 dragger->updateKnotShape();
1552 return;
1553 }
1554 }
1556 GrDragger *new_dragger = new GrDragger(this, p, draggable);
1557 // fixme: draggers should be added AFTER the last one: this way tabbing through them will be from begin to end.
1558 this->draggers = g_list_append (this->draggers, new_dragger);
1559 }
1561 /**
1562 Add draggers for the radial gradient rg on item
1563 */
1564 void
1565 GrDrag::addDraggersRadial (SPRadialGradient *rg, SPItem *item, bool fill_or_stroke)
1566 {
1567 addDragger (new GrDraggable (item, POINT_RG_CENTER, 0, fill_or_stroke));
1568 guint num = rg->vector.stops.size();
1569 if (num > 2) {
1570 for ( guint i = 1; i < num - 1; i++ ) {
1571 addDragger (new GrDraggable (item, POINT_RG_MID1, i, fill_or_stroke));
1572 }
1573 }
1574 addDragger (new GrDraggable (item, POINT_RG_R1, num-1, fill_or_stroke));
1575 if (num > 2) {
1576 for ( guint i = 1; i < num - 1; i++ ) {
1577 addDragger (new GrDraggable (item, POINT_RG_MID2, i, fill_or_stroke));
1578 }
1579 }
1580 addDragger (new GrDraggable (item, POINT_RG_R2, num-1, fill_or_stroke));
1581 addDragger (new GrDraggable (item, POINT_RG_FOCUS, 0, fill_or_stroke));
1582 }
1584 /**
1585 Add draggers for the linear gradient lg on item
1586 */
1587 void
1588 GrDrag::addDraggersLinear (SPLinearGradient *lg, SPItem *item, bool fill_or_stroke)
1589 {
1590 addDragger (new GrDraggable (item, POINT_LG_BEGIN, 0, fill_or_stroke));
1591 guint num = lg->vector.stops.size();
1592 if (num > 2) {
1593 for ( guint i = 1; i < num - 1; i++ ) {
1594 addDragger (new GrDraggable (item, POINT_LG_MID, i, fill_or_stroke));
1595 }
1596 }
1597 addDragger (new GrDraggable (item, POINT_LG_END, num-1, fill_or_stroke));
1598 }
1600 /**
1601 Artificially grab the knot of this dragger; used by the gradient context
1602 */
1603 void
1604 GrDrag::grabKnot (GrDragger *dragger, gint x, gint y, guint32 etime)
1605 {
1606 if (dragger) {
1607 sp_knot_start_dragging (dragger->knot, dragger->point, x, y, etime);
1608 }
1609 }
1611 /**
1612 Artificially grab the knot of the dragger with this draggable; used by the gradient context
1613 */
1614 void
1615 GrDrag::grabKnot (SPItem *item, gint point_type, gint point_i, bool fill_or_stroke, gint x, gint y, guint32 etime)
1616 {
1617 GrDragger *dragger = getDraggerFor (item, point_type, point_i, fill_or_stroke);
1618 if (dragger) {
1619 sp_knot_start_dragging (dragger->knot, dragger->point, x, y, etime);
1620 }
1621 }
1623 /**
1624 Regenerates the draggers list from the current selection; is called when selection is changed or
1625 modified, also when a radial dragger needs to update positions of other draggers in the gradient
1626 */
1627 void
1628 GrDrag::updateDraggers ()
1629 {
1630 while (selected) {
1631 selected = g_list_remove(selected, selected->data);
1632 }
1633 // delete old draggers
1634 for (GList const* i = this->draggers; i != NULL; i = i->next) {
1635 delete ((GrDragger *) i->data);
1636 }
1637 g_list_free (this->draggers);
1638 this->draggers = NULL;
1640 g_return_if_fail (this->selection != NULL);
1642 for (GSList const* i = this->selection->itemList(); i != NULL; i = i->next) {
1644 SPItem *item = SP_ITEM(i->data);
1645 SPStyle *style = SP_OBJECT_STYLE (item);
1647 if (style && (style->fill.isPaintserver())) {
1648 SPObject *server = SP_OBJECT_STYLE_FILL_SERVER (item);
1649 if (SP_IS_LINEARGRADIENT (server)) {
1650 addDraggersLinear (SP_LINEARGRADIENT (server), item, true);
1651 } else if (SP_IS_RADIALGRADIENT (server)) {
1652 addDraggersRadial (SP_RADIALGRADIENT (server), item, true);
1653 }
1654 }
1656 if (style && (style->stroke.isPaintserver())) {
1657 SPObject *server = SP_OBJECT_STYLE_STROKE_SERVER (item);
1658 if (SP_IS_LINEARGRADIENT (server)) {
1659 addDraggersLinear (SP_LINEARGRADIENT (server), item, false);
1660 } else if (SP_IS_RADIALGRADIENT (server)) {
1661 addDraggersRadial (SP_RADIALGRADIENT (server), item, false);
1662 }
1663 }
1664 }
1665 }
1667 /**
1668 Regenerates the lines list from the current selection; is called on each move of a dragger, so that
1669 lines are always in sync with the actual gradient
1670 */
1671 void
1672 GrDrag::updateLines ()
1673 {
1674 // delete old lines
1675 for (GSList const *i = this->lines; i != NULL; i = i->next) {
1676 gtk_object_destroy( GTK_OBJECT (i->data));
1677 }
1678 g_slist_free (this->lines);
1679 this->lines = NULL;
1681 g_return_if_fail (this->selection != NULL);
1683 for (GSList const* i = this->selection->itemList(); i != NULL; i = i->next) {
1685 SPItem *item = SP_ITEM(i->data);
1687 SPStyle *style = SP_OBJECT_STYLE (item);
1689 if (style && (style->fill.isPaintserver())) {
1690 SPObject *server = SP_OBJECT_STYLE_FILL_SERVER (item);
1691 if (SP_IS_LINEARGRADIENT (server)) {
1692 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);
1693 } else if (SP_IS_RADIALGRADIENT (server)) {
1694 NR::Point center = sp_item_gradient_get_coords (item, POINT_RG_CENTER, 0, true);
1695 this->addLine (item, center, sp_item_gradient_get_coords (item, POINT_RG_R1, 0, true), GR_LINE_COLOR_FILL);
1696 this->addLine (item, center, sp_item_gradient_get_coords (item, POINT_RG_R2, 0, true), GR_LINE_COLOR_FILL);
1697 }
1698 }
1700 if (style && (style->stroke.isPaintserver())) {
1701 SPObject *server = SP_OBJECT_STYLE_STROKE_SERVER (item);
1702 if (SP_IS_LINEARGRADIENT (server)) {
1703 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);
1704 } else if (SP_IS_RADIALGRADIENT (server)) {
1705 NR::Point center = sp_item_gradient_get_coords (item, POINT_RG_CENTER, 0, false);
1706 this->addLine (item, center, sp_item_gradient_get_coords (item, POINT_RG_R1, 0, false), GR_LINE_COLOR_STROKE);
1707 this->addLine (item, center, sp_item_gradient_get_coords (item, POINT_RG_R2, 0, false), GR_LINE_COLOR_STROKE);
1708 }
1709 }
1710 }
1711 }
1713 /**
1714 Regenerates the levels list from the current selection
1715 */
1716 void
1717 GrDrag::updateLevels ()
1718 {
1719 hor_levels.clear();
1720 vert_levels.clear();
1722 g_return_if_fail (this->selection != NULL);
1724 for (GSList const* i = this->selection->itemList(); i != NULL; i = i->next) {
1725 SPItem *item = SP_ITEM(i->data);
1726 NR::Maybe<NR::Rect> rect = sp_item_bbox_desktop (item);
1727 if (rect) {
1728 // Remember the edges of the bbox and the center axis
1729 hor_levels.push_back(rect->min()[NR::Y]);
1730 hor_levels.push_back(rect->max()[NR::Y]);
1731 hor_levels.push_back(0.5 * (rect->min()[NR::Y] + rect->max()[NR::Y]));
1732 vert_levels.push_back(rect->min()[NR::X]);
1733 vert_levels.push_back(rect->max()[NR::X]);
1734 vert_levels.push_back(0.5 * (rect->min()[NR::X] + rect->max()[NR::X]));
1735 }
1736 }
1737 }
1739 void
1740 GrDrag::selected_reverse_vector ()
1741 {
1742 if (selected == NULL)
1743 return;
1745 for (GSList const* i = ( (GrDragger*) selected->data )->draggables; i != NULL; i = i->next) {
1746 GrDraggable *draggable = (GrDraggable *) i->data;
1748 sp_item_gradient_reverse_vector (draggable->item, draggable->fill_or_stroke);
1749 }
1750 }
1752 void
1753 GrDrag::selected_move_nowrite (double x, double y, bool scale_radial)
1754 {
1755 selected_move (x, y, false, scale_radial);
1756 }
1758 void
1759 GrDrag::selected_move (double x, double y, bool write_repr, bool scale_radial)
1760 {
1761 if (selected == NULL)
1762 return;
1764 bool did = false;
1766 for (GList *i = selected; i != NULL; i = i->next) {
1767 GrDragger *d = (GrDragger *) i->data;
1769 if (!d->isA(POINT_LG_MID) && !d->isA(POINT_RG_MID1) && !d->isA(POINT_RG_MID2)) {
1770 // if this is an endpoint,
1772 // Moving an rg center moves its focus and radii as well.
1773 // therefore, if this is a focus or radius and if selection
1774 // contains the center as well, do not move this one
1775 if (d->isA(POINT_RG_R1) || d->isA(POINT_RG_R2) ||
1776 (d->isA(POINT_RG_FOCUS) && !d->isA(POINT_RG_CENTER))) {
1777 bool skip_radius_with_center = false;
1778 for (GList *di = selected; di != NULL; di = di->next) {
1779 GrDragger *d_new = (GrDragger *) di->data;
1780 if (d_new->isA (((GrDraggable *) d->draggables->data)->item,
1781 POINT_RG_CENTER,
1782 0,
1783 ((GrDraggable *) d->draggables->data)->fill_or_stroke)) {
1784 // FIXME: here we take into account only the first draggable!
1785 skip_radius_with_center = true;
1786 }
1787 }
1788 if (skip_radius_with_center)
1789 continue;
1790 }
1792 did = true;
1793 d->point += NR::Point (x, y);
1794 d->point_original = d->point;
1795 sp_knot_moveto (d->knot, &(d->point));
1797 d->fireDraggables (write_repr, scale_radial);
1799 d->updateDependencies(write_repr);
1800 }
1801 }
1803 if (write_repr && did) {
1804 // we did an undoable action
1805 sp_document_maybe_done (sp_desktop_document (desktop), "grmoveh", SP_VERB_CONTEXT_GRADIENT,
1806 _("Move gradient handle(s)"));
1807 return;
1808 }
1810 if (!did) { // none of the end draggers are selected, so let's try to move the mids
1812 GrDragger *dragger = (GrDragger *) selected->data;
1813 // a midpoint dragger can (logically) only contain one GrDraggable
1814 GrDraggable *draggable = (GrDraggable *) dragger->draggables->data;
1816 NR::Point begin(0,0), end(0,0);
1817 NR::Point low_lim(0,0), high_lim(0,0);
1819 SPObject *server = draggable->getServer();
1820 GSList *moving = NULL;
1821 gr_midpoint_limits(dragger, server, &begin, &end, &low_lim, &high_lim, &moving);
1823 NR::Point p(x, y);
1824 p = snap_vector_midpoint (dragger->point + p, low_lim, high_lim, 0);
1825 NR::Point displacement = p - dragger->point;
1827 for (GSList const* i = moving; i != NULL; i = i->next) {
1828 GrDragger *drg = (GrDragger*) i->data;
1829 SPKnot *drgknot = drg->knot;
1830 drg->point += displacement;
1831 sp_knot_moveto (drgknot, & drg->point);
1832 drg->fireDraggables (true);
1833 drg->updateDependencies(true);
1834 did = true;
1835 }
1837 g_slist_free(moving);
1839 if (write_repr && did) {
1840 // we did an undoable action
1841 sp_document_maybe_done (sp_desktop_document (desktop), "grmovem", SP_VERB_CONTEXT_GRADIENT,
1842 _("Move gradient mid stop(s)"));
1843 }
1844 }
1845 }
1847 void
1848 GrDrag::selected_move_screen (double x, double y)
1849 {
1850 gdouble zoom = desktop->current_zoom();
1851 gdouble zx = x / zoom;
1852 gdouble zy = y / zoom;
1854 selected_move (zx, zy);
1855 }
1857 /**
1858 Select the knot next to the last selected one and deselect all other selected.
1859 */
1860 GrDragger *
1861 GrDrag::select_next ()
1862 {
1863 GrDragger *d = NULL;
1864 if (selected == NULL || g_list_find(draggers, selected->data)->next == NULL) {
1865 if (draggers)
1866 d = (GrDragger *) draggers->data;
1867 } else {
1868 d = (GrDragger *) g_list_find(draggers, selected->data)->next->data;
1869 }
1870 if (d)
1871 setSelected (d);
1872 return d;
1873 }
1875 /**
1876 Select the knot previous from the last selected one and deselect all other selected.
1877 */
1878 GrDragger *
1879 GrDrag::select_prev ()
1880 {
1881 GrDragger *d = NULL;
1882 if (selected == NULL || g_list_find(draggers, selected->data)->prev == NULL) {
1883 if (draggers)
1884 d = (GrDragger *) g_list_last (draggers)->data;
1885 } else {
1886 d = (GrDragger *) g_list_find(draggers, selected->data)->prev->data;
1887 }
1888 if (d)
1889 setSelected (d);
1890 return d;
1891 }
1894 // FIXME: i.m.o. an ugly function that I just made to work, but... aargh! (Johan)
1895 void
1896 GrDrag::deleteSelected (bool just_one)
1897 {
1898 if (!selected) return;
1900 SPDocument *document = false;
1902 struct StructStopInfo {
1903 SPStop * spstop;
1904 GrDraggable * draggable;
1905 SPGradient * gradient;
1906 SPGradient * vector;
1907 };
1909 GSList *midstoplist = NULL; // list of stops that must be deleted (will be deleted first)
1910 GSList *endstoplist = NULL; // list of stops that must be deleted
1911 while (selected) {
1912 GrDragger *dragger = (GrDragger*) selected->data;
1913 for (GSList * drgble = dragger->draggables; drgble != NULL; drgble = drgble->next) {
1914 GrDraggable *draggable = (GrDraggable*) drgble->data;
1915 SPGradient *gradient = sp_item_gradient (draggable->item, draggable->fill_or_stroke);
1916 SPGradient *vector = sp_gradient_get_forked_vector_if_necessary (gradient, false);
1918 switch (draggable->point_type) {
1919 case POINT_LG_MID:
1920 case POINT_RG_MID1:
1921 case POINT_RG_MID2:
1922 {
1923 SPStop *stop = sp_get_stop_i(vector, draggable->point_i);
1924 // check if already present in list. (e.g. when both RG_MID1 and RG_MID2 were selected)
1925 bool present = false;
1926 for (GSList const * l = midstoplist; l != NULL; l = l->next) {
1927 if ( (SPStop*)l->data == stop ) {
1928 present = true;
1929 break; // no need to search further.
1930 }
1931 }
1932 if (!present)
1933 midstoplist = g_slist_append(midstoplist, stop);
1934 }
1935 break;
1936 case POINT_LG_BEGIN:
1937 case POINT_LG_END:
1938 case POINT_RG_CENTER:
1939 case POINT_RG_R1:
1940 case POINT_RG_R2:
1941 {
1942 SPStop *stop = NULL;
1943 if ( (draggable->point_type == POINT_LG_BEGIN) || (draggable->point_type == POINT_RG_CENTER) ) {
1944 stop = sp_first_stop(vector);
1945 } else {
1946 stop = sp_last_stop(vector);
1947 }
1948 if (stop) {
1949 StructStopInfo *stopinfo = new StructStopInfo;
1950 stopinfo->spstop = stop;
1951 stopinfo->draggable = draggable;
1952 stopinfo->gradient = gradient;
1953 stopinfo->vector = vector;
1954 // check if already present in list. (e.g. when both R1 and R2 were selected)
1955 bool present = false;
1956 for (GSList const * l = endstoplist; l != NULL; l = l->next) {
1957 if ( ((StructStopInfo*)l->data)->spstop == stopinfo->spstop ) {
1958 present = true;
1959 break; // no need to search further.
1960 }
1961 }
1962 if (!present)
1963 endstoplist = g_slist_append(endstoplist, stopinfo);
1964 }
1965 }
1966 break;
1967 default:
1968 break;
1969 }
1970 }
1971 selected = g_list_remove(selected, dragger);
1972 if ( just_one ) break; // iterate once if just_one is set.
1973 }
1974 while (midstoplist) {
1975 SPStop *stop = (SPStop*) midstoplist->data;
1976 document = SP_OBJECT_DOCUMENT (stop);
1977 Inkscape::XML::Node * parent = SP_OBJECT_REPR(stop)->parent();
1978 parent->removeChild(SP_OBJECT_REPR(stop));
1979 midstoplist = g_slist_remove(midstoplist, stop);
1980 }
1981 while (endstoplist) {
1982 StructStopInfo *stopinfo = (StructStopInfo*) endstoplist->data;
1983 document = SP_OBJECT_DOCUMENT (stopinfo->spstop);
1985 // 2 is the minimum, cannot delete more than that without deleting the whole vector
1986 // cannot use vector->vector.stops.size() because the vector might be invalidated by deletion of a midstop
1987 // manually count the children, don't know if there already exists a function for this...
1988 int len = 0;
1989 for ( SPObject *child = sp_object_first_child(stopinfo->vector) ;
1990 child != NULL ;
1991 child = SP_OBJECT_NEXT(child) )
1992 {
1993 if ( SP_IS_STOP(child) ) len ++;
1994 }
1995 if (len > 2)
1996 {
1997 switch (stopinfo->draggable->point_type) {
1998 case POINT_LG_BEGIN:
1999 {
2000 SP_OBJECT_REPR(stopinfo->vector)->removeChild(SP_OBJECT_REPR(stopinfo->spstop));
2002 SPLinearGradient *lg = SP_LINEARGRADIENT(stopinfo->gradient);
2003 NR::Point oldbegin = NR::Point (lg->x1.computed, lg->y1.computed);
2004 NR::Point end = NR::Point (lg->x2.computed, lg->y2.computed);
2005 SPStop *stop = sp_first_stop(stopinfo->vector);
2006 gdouble offset = stop->offset;
2007 NR::Point newbegin = oldbegin + offset * (end - oldbegin);
2008 lg->x1.computed = newbegin[NR::X];
2009 lg->y1.computed = newbegin[NR::Y];
2011 Inkscape::XML::Node *repr = SP_OBJECT_REPR(stopinfo->gradient);
2012 sp_repr_set_svg_double(repr, "x1", lg->x1.computed);
2013 sp_repr_set_svg_double(repr, "y1", lg->y1.computed);
2014 stop->offset = 0;
2015 sp_repr_set_css_double (SP_OBJECT_REPR (stop), "offset", 0);
2017 // iterate through midstops to set new offset values such that they won't move on canvas.
2018 SPStop *laststop = sp_last_stop(stopinfo->vector);
2019 stop = sp_next_stop(stop);
2020 while ( stop != laststop ) {
2021 stop->offset = (stop->offset - offset)/(1 - offset);
2022 sp_repr_set_css_double (SP_OBJECT_REPR (stop), "offset", stop->offset);
2023 stop = sp_next_stop(stop);
2024 }
2025 }
2026 break;
2027 case POINT_LG_END:
2028 {
2029 SP_OBJECT_REPR(stopinfo->vector)->removeChild(SP_OBJECT_REPR(stopinfo->spstop));
2031 SPLinearGradient *lg = SP_LINEARGRADIENT(stopinfo->gradient);
2032 NR::Point begin = NR::Point (lg->x1.computed, lg->y1.computed);
2033 NR::Point oldend = NR::Point (lg->x2.computed, lg->y2.computed);
2034 SPStop *laststop = sp_last_stop(stopinfo->vector);
2035 gdouble offset = laststop->offset;
2036 NR::Point newend = begin + offset * (oldend - begin);
2037 lg->x2.computed = newend[NR::X];
2038 lg->y2.computed = newend[NR::Y];
2040 Inkscape::XML::Node *repr = SP_OBJECT_REPR(stopinfo->gradient);
2041 sp_repr_set_svg_double(repr, "x2", lg->x2.computed);
2042 sp_repr_set_svg_double(repr, "y2", lg->y2.computed);
2043 laststop->offset = 1;
2044 sp_repr_set_css_double (SP_OBJECT_REPR (laststop), "offset", 1);
2046 // iterate through midstops to set new offset values such that they won't move on canvas.
2047 SPStop *stop = sp_first_stop(stopinfo->vector);
2048 stop = sp_next_stop(stop);
2049 while ( stop != laststop ) {
2050 stop->offset = stop->offset / offset;
2051 sp_repr_set_css_double (SP_OBJECT_REPR (stop), "offset", stop->offset);
2052 stop = sp_next_stop(stop);
2053 }
2054 }
2055 break;
2056 case POINT_RG_CENTER:
2057 {
2058 SPStop *newfirst = sp_next_stop (stopinfo->spstop);
2059 if (newfirst) {
2060 newfirst->offset = 0;
2061 sp_repr_set_css_double (SP_OBJECT_REPR (newfirst), "offset", 0);
2062 }
2063 SP_OBJECT_REPR(stopinfo->vector)->removeChild(SP_OBJECT_REPR(stopinfo->spstop));
2064 }
2065 break;
2066 case POINT_RG_R1:
2067 case POINT_RG_R2:
2068 SP_OBJECT_REPR(stopinfo->vector)->removeChild(SP_OBJECT_REPR(stopinfo->spstop));
2070 SPRadialGradient *rg = SP_RADIALGRADIENT(stopinfo->gradient);
2071 double oldradius = rg->r.computed;
2072 SPStop *laststop = sp_last_stop(stopinfo->vector);
2073 gdouble offset = laststop->offset;
2074 double newradius = offset * oldradius;
2075 rg->r.computed = newradius;
2077 Inkscape::XML::Node *repr = SP_OBJECT_REPR(rg);
2078 sp_repr_set_svg_double(repr, "r", rg->r.computed);
2079 laststop->offset = 1;
2080 sp_repr_set_css_double (SP_OBJECT_REPR (laststop), "offset", 1);
2082 // iterate through midstops to set new offset values such that they won't move on canvas.
2083 SPStop *stop = sp_first_stop(stopinfo->vector);
2084 stop = sp_next_stop(stop);
2085 while ( stop != laststop ) {
2086 stop->offset = stop->offset / offset;
2087 sp_repr_set_css_double (SP_OBJECT_REPR (stop), "offset", stop->offset);
2088 stop = sp_next_stop(stop);
2089 }
2090 break;
2091 }
2092 }
2093 else
2094 { // delete the gradient from the object. set fill to unset FIXME: set to fill of unselected node?
2095 SPCSSAttr *css = sp_repr_css_attr_new ();
2097 // stopinfo->spstop is the selected stop
2098 Inkscape::XML::Node *unselectedrepr = SP_OBJECT_REPR(stopinfo->vector)->firstChild();
2099 if (unselectedrepr == SP_OBJECT_REPR(stopinfo->spstop) ) {
2100 unselectedrepr = unselectedrepr->next();
2101 }
2103 if (unselectedrepr == NULL) {
2104 if (stopinfo->draggable->fill_or_stroke) {
2105 sp_repr_css_unset_property (css, "fill");
2106 } else {
2107 sp_repr_css_unset_property (css, "stroke");
2108 }
2109 } else {
2110 SPCSSAttr *stopcss = sp_repr_css_attr(unselectedrepr, "style");
2111 if (stopinfo->draggable->fill_or_stroke) {
2112 sp_repr_css_set_property(css, "fill", sp_repr_css_property(stopcss, "stop-color", "inkscape:unset"));
2113 sp_repr_css_set_property(css, "fill-opacity", sp_repr_css_property(stopcss, "stop-opacity", "1"));
2114 } else {
2115 sp_repr_css_set_property(css, "stroke", sp_repr_css_property(stopcss, "stop-color", "inkscape:unset"));
2116 sp_repr_css_set_property(css, "stroke-opacity", sp_repr_css_property(stopcss, "stop-opacity", "1"));
2117 }
2118 sp_repr_css_attr_unref (stopcss);
2119 }
2121 sp_repr_css_change (SP_OBJECT_REPR (stopinfo->draggable->item), css, "style");
2122 sp_repr_css_attr_unref (css);
2123 }
2125 endstoplist = g_slist_remove(endstoplist, stopinfo);
2126 delete stopinfo;
2127 }
2129 if (document) {
2130 sp_document_done ( document, SP_VERB_CONTEXT_GRADIENT, _("Delete gradient stop(s)") );
2131 }
2132 }
2135 /*
2136 Local Variables:
2137 mode:c++
2138 c-file-style:"stroustrup"
2139 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
2140 indent-tabs-mode:nil
2141 fill-column:99
2142 End:
2143 */
2144 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4 :