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"
46 #include "display/snap-indicator.h"
49 #define GR_KNOT_COLOR_NORMAL 0xffffff00
50 #define GR_KNOT_COLOR_MOUSEOVER 0xff000000
51 #define GR_KNOT_COLOR_SELECTED 0x0000ff00
53 #define GR_LINE_COLOR_FILL 0x0000ff7f
54 #define GR_LINE_COLOR_STROKE 0x9999007f
56 // screen pixels between knots when they snap:
57 #define SNAP_DIST 5
59 // absolute distance between gradient points for them to become a single dragger when the drag is created:
60 #define MERGE_DIST 0.1
62 // knot shapes corresponding to GrPointType enum
63 SPKnotShapeType gr_knot_shapes [] = {
64 SP_KNOT_SHAPE_SQUARE, //POINT_LG_BEGIN
65 SP_KNOT_SHAPE_CIRCLE, //POINT_LG_END
66 SP_KNOT_SHAPE_DIAMOND, //POINT_LG_MID
67 SP_KNOT_SHAPE_SQUARE, // POINT_RG_CENTER
68 SP_KNOT_SHAPE_CIRCLE, // POINT_RG_R1
69 SP_KNOT_SHAPE_CIRCLE, // POINT_RG_R2
70 SP_KNOT_SHAPE_CROSS, // POINT_RG_FOCUS
71 SP_KNOT_SHAPE_DIAMOND, //POINT_RG_MID1
72 SP_KNOT_SHAPE_DIAMOND //POINT_RG_MID2
73 };
75 const gchar *gr_knot_descr [] = {
76 N_("Linear gradient <b>start</b>"), //POINT_LG_BEGIN
77 N_("Linear gradient <b>end</b>"),
78 N_("Linear gradient <b>mid stop</b>"),
79 N_("Radial gradient <b>center</b>"),
80 N_("Radial gradient <b>radius</b>"),
81 N_("Radial gradient <b>radius</b>"),
82 N_("Radial gradient <b>focus</b>"), // POINT_RG_FOCUS
83 N_("Radial gradient <b>mid stop</b>"),
84 N_("Radial gradient <b>mid stop</b>")
85 };
87 static void
88 gr_drag_sel_changed(Inkscape::Selection */*selection*/, gpointer data)
89 {
90 GrDrag *drag = (GrDrag *) data;
91 drag->updateDraggers ();
92 drag->updateLines ();
93 drag->updateLevels ();
94 }
96 static void
97 gr_drag_sel_modified (Inkscape::Selection */*selection*/, guint /*flags*/, gpointer data)
98 {
99 GrDrag *drag = (GrDrag *) data;
100 if (drag->local_change) {
101 drag->local_change = false;
102 } else {
103 drag->updateDraggers ();
104 }
105 drag->updateLines ();
106 drag->updateLevels ();
107 }
109 /**
110 When a _query_style_signal is received, check that \a property requests fill/stroke/opacity (otherwise
111 skip), and fill the \a style with the averaged color of all draggables of the selected dragger, if
112 any.
113 */
114 int
115 gr_drag_style_query (SPStyle *style, int property, gpointer data)
116 {
117 GrDrag *drag = (GrDrag *) data;
119 if (property != QUERY_STYLE_PROPERTY_FILL && property != QUERY_STYLE_PROPERTY_STROKE && property != QUERY_STYLE_PROPERTY_MASTEROPACITY) {
120 return QUERY_STYLE_NOTHING;
121 }
123 if (!drag->selected) {
124 return QUERY_STYLE_NOTHING;
125 } else {
126 int ret = QUERY_STYLE_NOTHING;
128 float cf[4];
129 cf[0] = cf[1] = cf[2] = cf[3] = 0;
131 int count = 0;
133 for (GList *i = drag->selected; i != NULL; i = i->next) { // for all selected draggers
134 GrDragger *d = (GrDragger *) i->data;
135 for (GSList const* j = d->draggables; j != NULL; j = j->next) { // for all draggables of dragger
136 GrDraggable *draggable = (GrDraggable *) j->data;
138 if (ret == QUERY_STYLE_NOTHING) {
139 ret = QUERY_STYLE_SINGLE;
140 } else if (ret == QUERY_STYLE_SINGLE) {
141 ret = QUERY_STYLE_MULTIPLE_AVERAGED;
142 }
144 guint32 c = sp_item_gradient_stop_query_style (draggable->item, draggable->point_type, draggable->point_i, draggable->fill_or_stroke);
145 cf[0] += SP_RGBA32_R_F (c);
146 cf[1] += SP_RGBA32_G_F (c);
147 cf[2] += SP_RGBA32_B_F (c);
148 cf[3] += SP_RGBA32_A_F (c);
150 count ++;
151 }
152 }
154 if (count) {
155 cf[0] /= count;
156 cf[1] /= count;
157 cf[2] /= count;
158 cf[3] /= count;
160 // set both fill and stroke with our stop-color and stop-opacity
161 style->fill.clear();
162 style->fill.setColor( cf[0], cf[1], cf[2] );
163 style->fill.set = TRUE;
164 style->stroke.clear();
165 style->stroke.setColor( cf[0], cf[1], cf[2] );
166 style->stroke.set = TRUE;
168 style->fill_opacity.value = SP_SCALE24_FROM_FLOAT (1.0);
169 style->fill_opacity.set = TRUE;
170 style->stroke_opacity.value = SP_SCALE24_FROM_FLOAT (1.0);
171 style->stroke_opacity.set = TRUE;
173 style->opacity.value = SP_SCALE24_FROM_FLOAT (cf[3]);
174 style->opacity.set = TRUE;
175 }
177 return ret;
178 }
179 }
181 bool
182 gr_drag_style_set (const SPCSSAttr *css, gpointer data)
183 {
184 GrDrag *drag = (GrDrag *) data;
186 if (!drag->selected)
187 return false;
189 SPCSSAttr *stop = sp_repr_css_attr_new ();
191 // See if the css contains interesting properties, and if so, translate them into the format
192 // acceptable for gradient stops
194 // any of color properties, in order of increasing priority:
195 if (css->attribute("flood-color"))
196 sp_repr_css_set_property (stop, "stop-color", css->attribute("flood-color"));
198 if (css->attribute("lighting-color"))
199 sp_repr_css_set_property (stop, "stop-color", css->attribute("lighting-color"));
201 if (css->attribute("color"))
202 sp_repr_css_set_property (stop, "stop-color", css->attribute("color"));
204 if (css->attribute("stroke") && strcmp(css->attribute("stroke"), "none"))
205 sp_repr_css_set_property (stop, "stop-color", css->attribute("stroke"));
207 if (css->attribute("fill") && strcmp(css->attribute("fill"), "none"))
208 sp_repr_css_set_property (stop, "stop-color", css->attribute("fill"));
210 if (css->attribute("stop-color"))
211 sp_repr_css_set_property (stop, "stop-color", css->attribute("stop-color"));
214 if (css->attribute("stop-opacity")) { // direct setting of stop-opacity has priority
215 sp_repr_css_set_property (stop, "stop-opacity", css->attribute("stop-opacity"));
216 } else { // multiply all opacity properties:
217 gdouble accumulated = 1.0;
218 accumulated *= sp_svg_read_percentage(css->attribute("flood-opacity"), 1.0);
219 accumulated *= sp_svg_read_percentage(css->attribute("opacity"), 1.0);
220 accumulated *= sp_svg_read_percentage(css->attribute("stroke-opacity"), 1.0);
221 accumulated *= sp_svg_read_percentage(css->attribute("fill-opacity"), 1.0);
223 Inkscape::CSSOStringStream os;
224 os << accumulated;
225 sp_repr_css_set_property (stop, "stop-opacity", os.str().c_str());
227 if ((css->attribute("fill") && !css->attribute("stroke") && !strcmp(css->attribute("fill"), "none")) ||
228 (css->attribute("stroke") && !css->attribute("fill") && !strcmp(css->attribute("stroke"), "none")))
229 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
230 }
232 if (!stop->attributeList()) { // nothing for us here, pass it on
233 sp_repr_css_attr_unref(stop);
234 return false;
235 }
237 for (GList const* sel = drag->selected; sel != NULL; sel = sel->next) { // for all selected draggers
238 GrDragger* dragger = (GrDragger*) sel->data;
239 for (GSList const* i = dragger->draggables; i != NULL; i = i->next) { // for all draggables of dragger
240 GrDraggable *draggable = (GrDraggable *) i->data;
242 drag->local_change = true;
243 sp_item_gradient_stop_set_style (draggable->item, draggable->point_type, draggable->point_i, draggable->fill_or_stroke, stop);
244 }
245 }
247 //sp_repr_css_print(stop);
248 sp_repr_css_attr_unref(stop);
249 return true;
250 }
252 guint32 GrDrag::getColor()
253 {
254 if (!selected) return 0;
256 float cf[4];
257 cf[0] = cf[1] = cf[2] = cf[3] = 0;
259 int count = 0;
261 for (GList *i = selected; i != NULL; i = i->next) { // for all selected draggers
262 GrDragger *d = (GrDragger *) i->data;
263 for (GSList const* j = d->draggables; j != NULL; j = j->next) { // for all draggables of dragger
264 GrDraggable *draggable = (GrDraggable *) j->data;
266 guint32 c = sp_item_gradient_stop_query_style (draggable->item, draggable->point_type, draggable->point_i, draggable->fill_or_stroke);
267 cf[0] += SP_RGBA32_R_F (c);
268 cf[1] += SP_RGBA32_G_F (c);
269 cf[2] += SP_RGBA32_B_F (c);
270 cf[3] += SP_RGBA32_A_F (c);
272 count ++;
273 }
274 }
276 if (count) {
277 cf[0] /= count;
278 cf[1] /= count;
279 cf[2] /= count;
280 cf[3] /= count;
281 }
283 return SP_RGBA32_F_COMPOSE(cf[0], cf[1], cf[2], cf[3]);
284 }
286 SPStop *
287 GrDrag::addStopNearPoint (SPItem *item, NR::Point mouse_p, double tolerance)
288 {
289 gfloat offset; // type of SPStop.offset = gfloat
290 SPGradient *gradient;
291 bool fill_or_stroke = true;
292 bool r1_knot = false;
294 bool addknot = false;
295 do {
296 gradient = sp_item_gradient (item, fill_or_stroke);
297 if (SP_IS_LINEARGRADIENT(gradient)) {
298 NR::Point begin = sp_item_gradient_get_coords(item, POINT_LG_BEGIN, 0, fill_or_stroke);
299 NR::Point end = sp_item_gradient_get_coords(item, POINT_LG_END, 0, fill_or_stroke);
301 NR::Point nearest = snap_vector_midpoint (mouse_p, begin, end, 0);
302 double dist_screen = NR::L2 (mouse_p - nearest);
303 if ( dist_screen < tolerance ) {
304 // add the knot
305 offset = get_offset_between_points(nearest, begin, end);
306 addknot = true;
307 break; // break out of the while loop: add only one knot
308 }
309 } else if (SP_IS_RADIALGRADIENT(gradient)) {
310 NR::Point begin = sp_item_gradient_get_coords(item, POINT_RG_CENTER, 0, fill_or_stroke);
311 NR::Point end = sp_item_gradient_get_coords(item, POINT_RG_R1, 0, fill_or_stroke);
312 NR::Point nearest = snap_vector_midpoint (mouse_p, begin, end, 0);
313 double dist_screen = NR::L2 (mouse_p - nearest);
314 if ( dist_screen < tolerance ) {
315 offset = get_offset_between_points(nearest, begin, end);
316 addknot = true;
317 r1_knot = true;
318 break; // break out of the while loop: add only one knot
319 }
321 end = sp_item_gradient_get_coords(item, POINT_RG_R2, 0, fill_or_stroke);
322 nearest = snap_vector_midpoint (mouse_p, begin, end, 0);
323 dist_screen = NR::L2 (mouse_p - nearest);
324 if ( dist_screen < tolerance ) {
325 offset = get_offset_between_points(nearest, begin, end);
326 addknot = true;
327 r1_knot = false;
328 break; // break out of the while loop: add only one knot
329 }
330 }
331 fill_or_stroke = !fill_or_stroke;
332 } while (!fill_or_stroke && !addknot) ;
334 if (addknot) {
335 SPGradient *vector = sp_gradient_get_forked_vector_if_necessary (gradient, false);
336 SPStop* prev_stop = sp_first_stop(vector);
337 SPStop* next_stop = sp_next_stop(prev_stop);
338 guint i = 1;
339 while ( (next_stop) && (next_stop->offset < offset) ) {
340 prev_stop = next_stop;
341 next_stop = sp_next_stop(next_stop);
342 i++;
343 }
344 if (!next_stop) {
345 // logical error: the endstop should have offset 1 and should always be more than this offset here
346 return NULL;
347 }
350 SPStop *newstop = sp_vector_add_stop (vector, prev_stop, next_stop, offset);
351 sp_gradient_ensure_vector (gradient);
352 updateDraggers();
354 return newstop;
355 }
357 return NULL;
358 }
361 bool
362 GrDrag::dropColor(SPItem */*item*/, gchar *c, NR::Point p)
363 {
364 // first, see if we can drop onto one of the existing draggers
365 for (GList *i = draggers; i != NULL; i = i->next) { // for all draggables of dragger
366 GrDragger *d = (GrDragger *) i->data;
368 if (NR::L2(p - d->point)*desktop->current_zoom() < 5) {
369 SPCSSAttr *stop = sp_repr_css_attr_new ();
370 sp_repr_css_set_property (stop, "stop-color", c);
371 sp_repr_css_set_property (stop, "stop-opacity", "1");
372 for (GSList *j = d->draggables; j != NULL; j = j->next) { // for all draggables of dragger
373 GrDraggable *draggable = (GrDraggable *) j->data;
374 local_change = true;
375 sp_item_gradient_stop_set_style (draggable->item, draggable->point_type, draggable->point_i, draggable->fill_or_stroke, stop);
376 }
377 sp_repr_css_attr_unref(stop);
378 return true;
379 }
380 }
382 // now see if we're over line and create a new stop
383 bool over_line = false;
384 SPCtrlLine *line = NULL;
385 if (lines) {
386 for (GSList *l = lines; (l != NULL) && (!over_line); l = l->next) {
387 line = (SPCtrlLine*) l->data;
388 NR::Point nearest = snap_vector_midpoint (p, line->s, line->e, 0);
389 double dist_screen = NR::L2 (p - nearest) * desktop->current_zoom();
390 if (line->item && dist_screen < 5) {
391 SPStop *stop = addStopNearPoint (line->item, p, 5/desktop->current_zoom());
392 if (stop) {
393 SPCSSAttr *css = sp_repr_css_attr_new ();
394 sp_repr_css_set_property (css, "stop-color", c);
395 sp_repr_css_set_property (css, "stop-opacity", "1");
396 sp_repr_css_change (SP_OBJECT_REPR (stop), css, "style");
397 return true;
398 }
399 }
400 }
401 }
403 return false;
404 }
407 GrDrag::GrDrag(SPDesktop *desktop) {
409 this->desktop = desktop;
411 this->selection = sp_desktop_selection(desktop);
413 this->draggers = NULL;
414 this->lines = NULL;
415 this->selected = NULL;
417 this->hor_levels.clear();
418 this->vert_levels.clear();
420 this->local_change = false;
422 this->sel_changed_connection = this->selection->connectChanged(
423 sigc::bind (
424 sigc::ptr_fun(&gr_drag_sel_changed),
425 (gpointer)this )
427 );
428 this->sel_modified_connection = this->selection->connectModified(
429 sigc::bind(
430 sigc::ptr_fun(&gr_drag_sel_modified),
431 (gpointer)this )
432 );
434 this->style_set_connection = this->desktop->connectSetStyle(
435 sigc::bind(
436 sigc::ptr_fun(&gr_drag_style_set),
437 (gpointer)this )
438 );
440 this->style_query_connection = this->desktop->connectQueryStyle(
441 sigc::bind(
442 sigc::ptr_fun(&gr_drag_style_query),
443 (gpointer)this )
444 );
446 this->updateDraggers ();
447 this->updateLines ();
448 this->updateLevels ();
450 if (desktop->gr_item) {
451 this->setSelected (getDraggerFor (desktop->gr_item, desktop->gr_point_type, desktop->gr_point_i, desktop->gr_fill_or_stroke));
452 }
453 }
455 GrDrag::~GrDrag()
456 {
457 this->sel_changed_connection.disconnect();
458 this->sel_modified_connection.disconnect();
459 this->style_set_connection.disconnect();
460 this->style_query_connection.disconnect();
462 if (this->selected) {
463 GrDraggable *draggable = (GrDraggable *) ((GrDragger*)this->selected->data)->draggables->data;
464 desktop->gr_item = draggable->item;
465 desktop->gr_point_type = draggable->point_type;
466 desktop->gr_point_i = draggable->point_i;
467 desktop->gr_fill_or_stroke = draggable->fill_or_stroke;
468 } else {
469 desktop->gr_item = NULL;
470 desktop->gr_point_type = 0;
471 desktop->gr_point_i = 0;
472 desktop->gr_fill_or_stroke = true;
473 }
475 deselect_all();
476 for (GList *l = this->draggers; l != NULL; l = l->next) {
477 delete ((GrDragger *) l->data);
478 }
479 g_list_free (this->draggers);
480 this->draggers = NULL;
481 this->selected = NULL;
483 for (GSList *l = this->lines; l != NULL; l = l->next) {
484 gtk_object_destroy( GTK_OBJECT (l->data));
485 }
486 g_slist_free (this->lines);
487 this->lines = NULL;
488 }
490 GrDraggable::GrDraggable (SPItem *item, guint point_type, guint point_i, bool fill_or_stroke)
491 {
492 this->item = item;
493 this->point_type = point_type;
494 this->point_i = point_i;
495 this->fill_or_stroke = fill_or_stroke;
497 g_object_ref (G_OBJECT (this->item));
498 }
500 GrDraggable::~GrDraggable ()
501 {
502 g_object_unref (G_OBJECT (this->item));
503 }
506 SPObject *
507 GrDraggable::getServer ()
508 {
509 if (!item)
510 return NULL;
512 SPObject *server = NULL;
513 if (fill_or_stroke)
514 server = SP_OBJECT_STYLE_FILL_SERVER (item);
515 else
516 server = SP_OBJECT_STYLE_STROKE_SERVER (item);
518 return server;
519 }
521 static void
522 gr_knot_moved_handler(SPKnot *knot, NR::Point const *ppointer, guint state, gpointer data)
523 {
524 GrDragger *dragger = (GrDragger *) data;
525 GrDrag *drag = dragger->parent;
527 NR::Point p = *ppointer;
529 // FIXME: take from prefs
530 double snap_dist = SNAP_DIST / dragger->parent->desktop->current_zoom();
532 dragger->parent->desktop->snapindicator->remove_snappoint();
534 if (state & GDK_SHIFT_MASK) {
535 // with Shift; unsnap if we carry more than one draggable
536 if (dragger->draggables && dragger->draggables->next) {
537 // create a new dragger
538 GrDragger *dr_new = new GrDragger (dragger->parent, dragger->point, NULL);
539 dragger->parent->draggers = g_list_prepend (dragger->parent->draggers, dr_new);
540 // relink to it all but the first draggable in the list
541 for (GSList const* i = dragger->draggables->next; i != NULL; i = i->next) {
542 GrDraggable *draggable = (GrDraggable *) i->data;
543 dr_new->addDraggable (draggable);
544 }
545 dr_new->updateKnotShape();
546 g_slist_free (dragger->draggables->next);
547 dragger->draggables->next = NULL;
548 dragger->updateKnotShape();
549 dragger->updateTip();
550 }
551 } else if (!(state & GDK_CONTROL_MASK)) {
552 // without Shift or Ctrl; see if we need to snap to another dragger
553 for (GList *di = dragger->parent->draggers; di != NULL; di = di->next) {
554 GrDragger *d_new = (GrDragger *) di->data;
555 if (dragger->mayMerge(d_new) && NR::L2 (d_new->point - p) < snap_dist) {
557 // Merge draggers:
558 for (GSList const* i = dragger->draggables; i != NULL; i = i->next) { // for all draggables of dragger
559 GrDraggable *draggable = (GrDraggable *) i->data;
560 // copy draggable to d_new:
561 GrDraggable *da_new = new GrDraggable (draggable->item, draggable->point_type, draggable->point_i, draggable->fill_or_stroke);
562 d_new->addDraggable (da_new);
563 }
565 // unlink and delete this dragger
566 dragger->parent->draggers = g_list_remove (dragger->parent->draggers, dragger);
567 delete dragger;
569 // update the new merged dragger
570 d_new->fireDraggables(true, false, true);
571 d_new->parent->updateLines();
572 d_new->parent->setSelected (d_new);
573 d_new->updateKnotShape ();
574 d_new->updateTip ();
575 d_new->updateDependencies(true);
576 sp_document_done (sp_desktop_document (d_new->parent->desktop), SP_VERB_CONTEXT_GRADIENT,
577 _("Merge gradient handles"));
578 return;
579 }
580 }
581 }
583 if (!((state & GDK_SHIFT_MASK) || ((state & GDK_CONTROL_MASK) && (state & GDK_MOD1_MASK)))) {
584 // Try snapping to the grid or guides
585 SnapManager const &m = dragger->parent->desktop->namedview->snap_manager;
586 Inkscape::SnappedPoint s = m.freeSnap(Inkscape::Snapper::SNAPPOINT_NODE, p, NULL);
587 if (s.getSnapped()) {
588 p = s.getPoint();
589 sp_knot_moveto (knot, &p);
590 dragger->parent->desktop->snapindicator->set_new_snappoint(s);
591 } else {
592 bool was_snapped = false;
593 double dist = NR_HUGE;
594 // No snapping so far, let's see if we need to snap to any of the levels
595 for (guint i = 0; i < dragger->parent->hor_levels.size(); i++) {
596 dist = fabs(p[NR::Y] - dragger->parent->hor_levels[i]);
597 if (dist < snap_dist) {
598 p[NR::Y] = dragger->parent->hor_levels[i];
599 s = Inkscape::SnappedPoint(p, dist, snap_dist, false);
600 was_snapped = true;
601 sp_knot_moveto (knot, &p);
602 }
603 }
604 for (guint i = 0; i < dragger->parent->vert_levels.size(); i++) {
605 dist = fabs(p[NR::X] - dragger->parent->vert_levels[i]);
606 if (dist < snap_dist) {
607 p[NR::X] = dragger->parent->vert_levels[i];
608 s = Inkscape::SnappedPoint(p, dist, snap_dist, false);
609 was_snapped = true;
610 sp_knot_moveto (knot, &p);
611 }
612 }
613 if (was_snapped) {
614 dragger->parent->desktop->snapindicator->set_new_snappoint(s);
615 }
616 }
617 }
619 if (state & GDK_CONTROL_MASK) {
620 unsigned snaps = abs(prefs_get_int_attribute("options.rotationsnapsperpi", "value", 12));
621 /* 0 means no snapping. */
623 // This list will store snap vectors from all draggables of dragger
624 GSList *snap_vectors = NULL;
626 for (GSList const* i = dragger->draggables; i != NULL; i = i->next) {
627 GrDraggable *draggable = (GrDraggable *) i->data;
629 NR::Point *dr_snap = NULL;
631 if (draggable->point_type == POINT_LG_BEGIN || draggable->point_type == POINT_LG_END) {
632 for (GList *di = dragger->parent->draggers; di != NULL; di = di->next) {
633 GrDragger *d_new = (GrDragger *) di->data;
634 if (d_new == dragger)
635 continue;
636 if (d_new->isA (draggable->item,
637 draggable->point_type == POINT_LG_BEGIN? POINT_LG_END : POINT_LG_BEGIN,
638 draggable->fill_or_stroke)) {
639 // found the other end of the linear gradient;
640 if (state & GDK_SHIFT_MASK) {
641 // moving linear around center
642 NR::Point center = NR::Point (0.5*(d_new->point + dragger->point));
643 dr_snap = ¢er;
644 } else {
645 // moving linear around the other end
646 dr_snap = &d_new->point;
647 }
648 }
649 }
650 } else if (draggable->point_type == POINT_RG_R1 || draggable->point_type == POINT_RG_R2 || draggable->point_type == POINT_RG_FOCUS) {
651 for (GList *di = dragger->parent->draggers; di != NULL; di = di->next) {
652 GrDragger *d_new = (GrDragger *) di->data;
653 if (d_new == dragger)
654 continue;
655 if (d_new->isA (draggable->item,
656 POINT_RG_CENTER,
657 draggable->fill_or_stroke)) {
658 // found the center of the radial gradient;
659 dr_snap = &(d_new->point);
660 }
661 }
662 } else if (draggable->point_type == POINT_RG_CENTER) {
663 // radial center snaps to hor/vert relative to its original position
664 dr_snap = &(dragger->point_original);
665 }
667 NR::Point *snap_vector = NULL;
668 if (dr_snap) {
669 if (state & GDK_MOD1_MASK) {
670 // with Alt, snap to the original angle and its perpendiculars
671 snap_vector = get_snap_vector (p, *dr_snap, M_PI/2, NR::atan2 (dragger->point_original - *dr_snap));
672 } else {
673 // with Ctrl, snap to M_PI/snaps
674 snap_vector = get_snap_vector (p, *dr_snap, M_PI/snaps, 0);
675 }
676 }
677 if (snap_vector) {
678 snap_vectors = g_slist_prepend (snap_vectors, snap_vector);
679 }
680 }
682 // Move by the smallest of snap vectors:
683 NR::Point move(9999, 9999);
684 for (GSList const *i = snap_vectors; i != NULL; i = i->next) {
685 NR::Point *snap_vector = (NR::Point *) i->data;
686 if (NR::L2(*snap_vector) < NR::L2(move))
687 move = *snap_vector;
688 }
689 if (move[NR::X] < 9999) {
690 p += move;
691 sp_knot_moveto (knot, &p);
692 }
694 g_slist_free(snap_vectors);
695 }
697 drag->keep_selection = (bool) g_list_find(drag->selected, dragger);
698 bool scale_radial = (state & GDK_CONTROL_MASK) && (state & GDK_SHIFT_MASK);
700 if (drag->keep_selection) {
701 NR::Point diff = p - dragger->point;
702 drag->selected_move_nowrite (diff[NR::X], diff[NR::Y], scale_radial);
703 } else {
704 dragger->point = p;
705 dragger->fireDraggables (false, scale_radial);
706 dragger->updateDependencies(false);
707 }
709 }
712 static void
713 gr_midpoint_limits(GrDragger *dragger, SPObject *server, NR::Point *begin, NR::Point *end, NR::Point *low_lim, NR::Point *high_lim, GSList **moving)
714 {
716 GrDrag *drag = dragger->parent;
717 // a midpoint dragger can (logically) only contain one GrDraggable
718 GrDraggable *draggable = (GrDraggable *) dragger->draggables->data;
720 // get begin and end points between which dragging is allowed:
721 // the draglimits are between knot(lowest_i - 1) and knot(highest_i + 1)
722 *moving = g_slist_append(*moving, dragger);
724 guint lowest_i = draggable->point_i;
725 guint highest_i = draggable->point_i;
726 GrDragger *lowest_dragger = dragger;
727 GrDragger *highest_dragger = dragger;
728 if (dragger->isSelected()) {
729 GrDragger* d_add;
730 while ( true )
731 {
732 d_add = drag->getDraggerFor(draggable->item, draggable->point_type, lowest_i - 1, draggable->fill_or_stroke);
733 if ( d_add && g_list_find(drag->selected, d_add) ) {
734 lowest_i = lowest_i - 1;
735 *moving = g_slist_prepend(*moving, d_add);
736 lowest_dragger = d_add;
737 } else {
738 break;
739 }
740 }
742 while ( true )
743 {
744 d_add = drag->getDraggerFor(draggable->item, draggable->point_type, highest_i + 1, draggable->fill_or_stroke);
745 if ( d_add && g_list_find(drag->selected, d_add) ) {
746 highest_i = highest_i + 1;
747 *moving = g_slist_append(*moving, d_add);
748 highest_dragger = d_add;
749 } else {
750 break;
751 }
752 }
753 }
755 if ( SP_IS_LINEARGRADIENT(server) ) {
756 guint num = SP_LINEARGRADIENT(server)->vector.stops.size();
757 GrDragger *d_temp;
758 if (lowest_i == 1) {
759 d_temp = drag->getDraggerFor (draggable->item, POINT_LG_BEGIN, 0, draggable->fill_or_stroke);
760 } else {
761 d_temp = drag->getDraggerFor (draggable->item, POINT_LG_MID, lowest_i - 1, draggable->fill_or_stroke);
762 }
763 if (d_temp)
764 *begin = d_temp->point;
766 d_temp = drag->getDraggerFor (draggable->item, POINT_LG_MID, highest_i + 1, draggable->fill_or_stroke);
767 if (d_temp == NULL) {
768 d_temp = drag->getDraggerFor (draggable->item, POINT_LG_END, num-1, draggable->fill_or_stroke);
769 }
770 if (d_temp)
771 *end = d_temp->point;
772 } else if ( SP_IS_RADIALGRADIENT(server) ) {
773 guint num = SP_RADIALGRADIENT(server)->vector.stops.size();
774 GrDragger *d_temp;
775 if (lowest_i == 1) {
776 d_temp = drag->getDraggerFor (draggable->item, POINT_RG_CENTER, 0, draggable->fill_or_stroke);
777 } else {
778 d_temp = drag->getDraggerFor (draggable->item, draggable->point_type, lowest_i - 1, draggable->fill_or_stroke);
779 }
780 if (d_temp)
781 *begin = d_temp->point;
783 d_temp = drag->getDraggerFor (draggable->item, draggable->point_type, highest_i + 1, draggable->fill_or_stroke);
784 if (d_temp == NULL) {
785 d_temp = drag->getDraggerFor (draggable->item, (draggable->point_type==POINT_RG_MID1) ? POINT_RG_R1 : POINT_RG_R2, num-1, draggable->fill_or_stroke);
786 }
787 if (d_temp)
788 *end = d_temp->point;
789 }
791 *low_lim = dragger->point - (lowest_dragger->point - *begin);
792 *high_lim = dragger->point - (highest_dragger->point - *end);
793 }
797 /**
798 Called when a midpoint knot is dragged.
799 */
800 static void
801 gr_knot_moved_midpoint_handler(SPKnot */*knot*/, NR::Point const *ppointer, guint state, gpointer data)
802 {
803 GrDragger *dragger = (GrDragger *) data;
804 GrDrag *drag = dragger->parent;
805 // a midpoint dragger can (logically) only contain one GrDraggable
806 GrDraggable *draggable = (GrDraggable *) dragger->draggables->data;
808 // FIXME: take from prefs
809 double snap_fraction = 0.1;
811 NR::Point p = *ppointer;
812 NR::Point begin(0,0), end(0,0);
813 NR::Point low_lim(0,0), high_lim(0,0);
815 SPObject *server = draggable->getServer();
817 GSList *moving = NULL;
818 gr_midpoint_limits(dragger, server, &begin, &end, &low_lim, &high_lim, &moving);
820 if (state & GDK_CONTROL_MASK) {
821 p = snap_vector_midpoint (p, low_lim, high_lim, snap_fraction);
822 } else {
823 p = snap_vector_midpoint (p, low_lim, high_lim, 0);
824 }
825 NR::Point displacement = p - dragger->point;
827 for (GSList const* i = moving; i != NULL; i = i->next) {
828 GrDragger *drg = (GrDragger*) i->data;
829 SPKnot *drgknot = drg->knot;
830 NR::Point this_move = displacement;
831 if (state & GDK_MOD1_MASK) {
832 // FIXME: unify all these profiles (here, in nodepath, in tweak) in one place
833 double alpha = 1.0;
834 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
835 double x = NR::L2(drg->point - dragger->point)/NR::L2(end - dragger->point);
836 this_move = (0.5 * cos (M_PI * (pow(x, alpha))) + 0.5) * this_move;
837 } else { // drg is on the begin side from dragger
838 double x = NR::L2(drg->point - dragger->point)/NR::L2(begin - dragger->point);
839 this_move = (0.5 * cos (M_PI * (pow(x, alpha))) + 0.5) * this_move;
840 }
841 }
842 drg->point += this_move;
843 sp_knot_moveto (drgknot, & drg->point);
844 drg->fireDraggables (false);
845 drg->updateDependencies(false);
846 }
848 g_slist_free(moving);
850 drag->keep_selection = dragger->isSelected();
851 }
855 static void
856 gr_knot_grabbed_handler (SPKnot */*knot*/, unsigned int /*state*/, gpointer data)
857 {
858 GrDragger *dragger = (GrDragger *) data;
860 sp_canvas_force_full_redraw_after_interruptions(dragger->parent->desktop->canvas, 5);
861 }
863 /**
864 Called when the mouse releases a dragger knot; changes gradient writing to repr, updates other draggers if needed
865 */
866 static void
867 gr_knot_ungrabbed_handler (SPKnot *knot, unsigned int state, gpointer data)
868 {
869 GrDragger *dragger = (GrDragger *) data;
871 sp_canvas_end_forced_full_redraws(dragger->parent->desktop->canvas);
873 dragger->point_original = dragger->point = knot->pos;
875 if ((state & GDK_CONTROL_MASK) && (state & GDK_SHIFT_MASK)) {
876 dragger->fireDraggables (true, true);
877 } else {
878 dragger->fireDraggables (true);
879 }
881 for (GList *i = dragger->parent->selected; i != NULL; i = i->next) {
882 GrDragger *d = (GrDragger *) i->data;
883 if (d == dragger)
884 continue;
885 d->fireDraggables (true);
886 }
888 // make this dragger selected
889 if (!dragger->parent->keep_selection) {
890 dragger->parent->setSelected (dragger);
891 }
892 dragger->parent->keep_selection = false;
894 dragger->updateDependencies(true);
896 // we did an undoable action
897 sp_document_done (sp_desktop_document (dragger->parent->desktop), SP_VERB_CONTEXT_GRADIENT,
898 _("Move gradient handle"));
899 }
901 /**
902 Called when a dragger knot is clicked; selects the dragger or deletes it depending on the
903 state of the keyboard keys
904 */
905 static void
906 gr_knot_clicked_handler(SPKnot */*knot*/, guint state, gpointer data)
907 {
908 GrDragger *dragger = (GrDragger *) data;
909 GrDraggable *draggable = (GrDraggable *) dragger->draggables->data;
910 if (!draggable) return;
912 if ( (state & GDK_CONTROL_MASK) && (state & GDK_MOD1_MASK ) ) {
913 // delete this knot from vector
914 SPGradient *gradient = sp_item_gradient (draggable->item, draggable->fill_or_stroke);
915 gradient = sp_gradient_get_vector (gradient, false);
916 if (gradient->vector.stops.size() > 2) { // 2 is the minimum
917 SPStop *stop = NULL;
918 switch (draggable->point_type) { // if we delete first or last stop, move the next/previous to the edge
919 case POINT_LG_BEGIN:
920 case POINT_RG_CENTER:
921 stop = sp_first_stop(gradient);
922 {
923 SPStop *next = sp_next_stop (stop);
924 if (next) {
925 next->offset = 0;
926 sp_repr_set_css_double (SP_OBJECT_REPR (next), "offset", 0);
927 }
928 }
929 break;
930 case POINT_LG_END:
931 case POINT_RG_R1:
932 case POINT_RG_R2:
933 stop = sp_last_stop(gradient);
934 {
935 SPStop *prev = sp_prev_stop (stop, gradient);
936 if (prev) {
937 prev->offset = 1;
938 sp_repr_set_css_double (SP_OBJECT_REPR (prev), "offset", 1);
939 }
940 }
941 break;
942 case POINT_LG_MID:
943 case POINT_RG_MID1:
944 case POINT_RG_MID2:
945 stop = sp_get_stop_i(gradient, draggable->point_i);
946 break;
947 }
949 SP_OBJECT_REPR(gradient)->removeChild(SP_OBJECT_REPR(stop));
950 sp_document_done (SP_OBJECT_DOCUMENT (gradient), SP_VERB_CONTEXT_GRADIENT,
951 _("Delete gradient stop"));
952 }
953 } else {
954 // select the dragger
955 dragger->point_original = dragger->point;
957 if ( state & GDK_SHIFT_MASK ) {
958 dragger->parent->setSelected (dragger, true, false);
959 } else {
960 dragger->parent->setSelected (dragger);
961 }
962 }
963 }
965 /**
966 Called when a dragger knot is doubleclicked; opens gradient editor with the stop from the first draggable
967 */
968 static void
969 gr_knot_doubleclicked_handler (SPKnot */*knot*/, guint /*state*/, gpointer data)
970 {
971 GrDragger *dragger = (GrDragger *) data;
973 dragger->point_original = dragger->point;
975 if (dragger->draggables == NULL)
976 return;
978 GrDraggable *draggable = (GrDraggable *) dragger->draggables->data;
979 sp_item_gradient_edit_stop (draggable->item, draggable->point_type, draggable->point_i, draggable->fill_or_stroke);
980 }
982 /**
983 Act upon all draggables of the dragger, setting them to the dragger's point
984 */
985 void
986 GrDragger::fireDraggables (bool write_repr, bool scale_radial, bool merging_focus)
987 {
988 for (GSList const* i = this->draggables; i != NULL; i = i->next) {
989 GrDraggable *draggable = (GrDraggable *) i->data;
991 // set local_change flag so that selection_changed callback does not regenerate draggers
992 this->parent->local_change = true;
994 // change gradient, optionally writing to repr; prevent focus from moving if it's snapped
995 // to the center, unless it's the first update upon merge when we must snap it to the point
996 if (merging_focus ||
997 !(draggable->point_type == POINT_RG_FOCUS && this->isA(draggable->item, POINT_RG_CENTER, draggable->point_i, draggable->fill_or_stroke)))
998 {
999 sp_item_gradient_set_coords (draggable->item, draggable->point_type, draggable->point_i, this->point, draggable->fill_or_stroke, write_repr, scale_radial);
1000 }
1001 }
1002 }
1004 /**
1005 Checks if the dragger has a draggable with this point_type
1006 */
1007 bool
1008 GrDragger::isA (gint point_type)
1009 {
1010 for (GSList const* i = this->draggables; i != NULL; i = i->next) {
1011 GrDraggable *draggable = (GrDraggable *) i->data;
1012 if (draggable->point_type == point_type) {
1013 return true;
1014 }
1015 }
1016 return false;
1017 }
1019 /**
1020 Checks if the dragger has a draggable with this item, point_type + point_i (number), fill_or_stroke
1021 */
1022 bool
1023 GrDragger::isA (SPItem *item, gint point_type, gint point_i, bool fill_or_stroke)
1024 {
1025 for (GSList const* i = this->draggables; i != NULL; i = i->next) {
1026 GrDraggable *draggable = (GrDraggable *) i->data;
1027 if ( (draggable->point_type == point_type) && (draggable->point_i == point_i) && (draggable->item == item) && (draggable->fill_or_stroke == fill_or_stroke) ) {
1028 return true;
1029 }
1030 }
1031 return false;
1032 }
1034 /**
1035 Checks if the dragger has a draggable with this item, point_type, fill_or_stroke
1036 */
1037 bool
1038 GrDragger::isA (SPItem *item, gint point_type, bool fill_or_stroke)
1039 {
1040 for (GSList const* i = this->draggables; i != NULL; i = i->next) {
1041 GrDraggable *draggable = (GrDraggable *) i->data;
1042 if ( (draggable->point_type == point_type) && (draggable->item == item) && (draggable->fill_or_stroke == fill_or_stroke) ) {
1043 return true;
1044 }
1045 }
1046 return false;
1047 }
1049 bool
1050 GrDraggable::mayMerge (GrDraggable *da2)
1051 {
1052 if ((this->item == da2->item) && (this->fill_or_stroke == da2->fill_or_stroke)) {
1053 // we must not merge the points of the same gradient!
1054 if (!((this->point_type == POINT_RG_FOCUS && da2->point_type == POINT_RG_CENTER) ||
1055 (this->point_type == POINT_RG_CENTER && da2->point_type == POINT_RG_FOCUS))) {
1056 // except that we can snap center and focus together
1057 return false;
1058 }
1059 }
1060 // disable merging of midpoints.
1061 if ( (this->point_type == POINT_LG_MID) || (da2->point_type == POINT_LG_MID)
1062 || (this->point_type == POINT_RG_MID1) || (da2->point_type == POINT_RG_MID1)
1063 || (this->point_type == POINT_RG_MID2) || (da2->point_type == POINT_RG_MID2) )
1064 return false;
1066 return true;
1067 }
1069 bool
1070 GrDragger::mayMerge (GrDragger *other)
1071 {
1072 if (this == other)
1073 return false;
1075 for (GSList const* i = this->draggables; i != NULL; i = i->next) { // for all draggables of this
1076 GrDraggable *da1 = (GrDraggable *) i->data;
1077 for (GSList const* j = other->draggables; j != NULL; j = j->next) { // for all draggables of other
1078 GrDraggable *da2 = (GrDraggable *) j->data;
1079 if (!da1->mayMerge(da2))
1080 return false;
1081 }
1082 }
1083 return true;
1084 }
1086 bool
1087 GrDragger::mayMerge (GrDraggable *da2)
1088 {
1089 for (GSList const* i = this->draggables; i != NULL; i = i->next) { // for all draggables of this
1090 GrDraggable *da1 = (GrDraggable *) i->data;
1091 if (!da1->mayMerge(da2))
1092 return false;
1093 }
1094 return true;
1095 }
1097 /**
1098 Updates the statusbar tip of the dragger knot, based on its draggables
1099 */
1100 void
1101 GrDragger::updateTip ()
1102 {
1103 if (this->knot && this->knot->tip) {
1104 g_free (this->knot->tip);
1105 this->knot->tip = NULL;
1106 }
1108 if (g_slist_length (this->draggables) == 1) {
1109 GrDraggable *draggable = (GrDraggable *) this->draggables->data;
1110 char *item_desc = sp_item_description(draggable->item);
1111 switch (draggable->point_type) {
1112 case POINT_LG_MID:
1113 case POINT_RG_MID1:
1114 case POINT_RG_MID2:
1115 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"),
1116 _(gr_knot_descr[draggable->point_type]),
1117 draggable->point_i,
1118 item_desc,
1119 draggable->fill_or_stroke == false ? _(" (stroke)") : "");
1120 break;
1122 default:
1123 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"),
1124 _(gr_knot_descr[draggable->point_type]),
1125 item_desc,
1126 draggable->fill_or_stroke == false ? _(" (stroke)") : "");
1127 break;
1128 }
1129 g_free(item_desc);
1130 } else if (g_slist_length (draggables) == 2 && isA (POINT_RG_CENTER) && isA (POINT_RG_FOCUS)) {
1131 this->knot->tip = g_strdup_printf (_("Radial gradient <b>center</b> and <b>focus</b>; drag with <b>Shift</b> to separate focus"));
1132 } else {
1133 int length = g_slist_length (this->draggables);
1134 this->knot->tip = g_strdup_printf (ngettext("Gradient point shared by <b>%d</b> gradient; drag with <b>Shift</b> to separate",
1135 "Gradient point shared by <b>%d</b> gradients; drag with <b>Shift</b> to separate",
1136 length),
1137 length);
1138 }
1139 }
1141 /**
1142 Adds a draggable to the dragger
1143 */
1144 void
1145 GrDragger::updateKnotShape ()
1146 {
1147 if (!draggables)
1148 return;
1149 GrDraggable *last = (GrDraggable *) g_slist_last(draggables)->data;
1150 g_object_set (G_OBJECT (this->knot->item), "shape", gr_knot_shapes[last->point_type], NULL);
1151 }
1153 /**
1154 Adds a draggable to the dragger
1155 */
1156 void
1157 GrDragger::addDraggable (GrDraggable *draggable)
1158 {
1159 this->draggables = g_slist_prepend (this->draggables, draggable);
1161 this->updateTip();
1162 }
1165 /**
1166 Moves this dragger to the point of the given draggable, acting upon all other draggables
1167 */
1168 void
1169 GrDragger::moveThisToDraggable (SPItem *item, gint point_type, gint point_i, bool fill_or_stroke, bool write_repr)
1170 {
1171 this->point = sp_item_gradient_get_coords (item, point_type, point_i, fill_or_stroke);
1172 this->point_original = this->point;
1174 sp_knot_moveto (this->knot, &(this->point));
1176 for (GSList const* i = this->draggables; i != NULL; i = i->next) {
1177 GrDraggable *da = (GrDraggable *) i->data;
1178 if ( (da->item == item) &&
1179 (point_type == -1 || da->point_type == point_type) &&
1180 (point_i == -1 || da->point_i == point_i) &&
1181 (da->fill_or_stroke == fill_or_stroke) ) {
1182 continue;
1183 }
1184 sp_item_gradient_set_coords (da->item, da->point_type, da->point_i, this->point, da->fill_or_stroke, write_repr, false);
1185 }
1186 // FIXME: here we should also call this->updateDependencies(write_repr); to propagate updating, but how to prevent loops?
1187 }
1190 /**
1191 Moves all midstop draggables that depend on this one
1192 */
1193 void
1194 GrDragger::updateMidstopDependencies (GrDraggable *draggable, bool write_repr) {
1195 SPObject *server = draggable->getServer();
1196 if (!server)
1197 return;
1198 guint num = SP_GRADIENT(server)->vector.stops.size();
1199 if (num <= 2) return;
1201 if ( SP_IS_LINEARGRADIENT(server) ) {
1202 for ( guint i = 1; i < num - 1; i++ ) {
1203 this->moveOtherToDraggable (draggable->item, POINT_LG_MID, i, draggable->fill_or_stroke, write_repr);
1204 }
1205 } else if ( SP_IS_RADIALGRADIENT(server) ) {
1206 for ( guint i = 1; i < num - 1; i++ ) {
1207 this->moveOtherToDraggable (draggable->item, POINT_RG_MID1, i, draggable->fill_or_stroke, write_repr);
1208 this->moveOtherToDraggable (draggable->item, POINT_RG_MID2, i, draggable->fill_or_stroke, write_repr);
1209 }
1210 }
1211 }
1214 /**
1215 Moves all draggables that depend on this one
1216 */
1217 void
1218 GrDragger::updateDependencies (bool write_repr)
1219 {
1220 for (GSList const* i = this->draggables; i != NULL; i = i->next) {
1221 GrDraggable *draggable = (GrDraggable *) i->data;
1222 switch (draggable->point_type) {
1223 case POINT_LG_BEGIN:
1224 {
1225 // the end point is dependent only when dragging with ctrl+shift
1226 this->moveOtherToDraggable (draggable->item, POINT_LG_END, -1, draggable->fill_or_stroke, write_repr);
1228 this->updateMidstopDependencies (draggable, write_repr);
1229 }
1230 break;
1231 case POINT_LG_END:
1232 {
1233 // the begin point is dependent only when dragging with ctrl+shift
1234 this->moveOtherToDraggable (draggable->item, POINT_LG_BEGIN, 0, draggable->fill_or_stroke, write_repr);
1236 this->updateMidstopDependencies (draggable, write_repr);
1237 }
1238 break;
1239 case POINT_LG_MID:
1240 // no other nodes depend on mid points.
1241 break;
1242 case POINT_RG_R2:
1243 this->moveOtherToDraggable (draggable->item, POINT_RG_R1, -1, draggable->fill_or_stroke, write_repr);
1244 this->moveOtherToDraggable (draggable->item, POINT_RG_FOCUS, -1, draggable->fill_or_stroke, write_repr);
1245 this->updateMidstopDependencies (draggable, write_repr);
1246 break;
1247 case POINT_RG_R1:
1248 this->moveOtherToDraggable (draggable->item, POINT_RG_R2, -1, draggable->fill_or_stroke, write_repr);
1249 this->moveOtherToDraggable (draggable->item, POINT_RG_FOCUS, -1, draggable->fill_or_stroke, write_repr);
1250 this->updateMidstopDependencies (draggable, write_repr);
1251 break;
1252 case POINT_RG_CENTER:
1253 this->moveOtherToDraggable (draggable->item, POINT_RG_R1, -1, draggable->fill_or_stroke, write_repr);
1254 this->moveOtherToDraggable (draggable->item, POINT_RG_R2, -1, draggable->fill_or_stroke, write_repr);
1255 this->moveOtherToDraggable (draggable->item, POINT_RG_FOCUS, -1, draggable->fill_or_stroke, write_repr);
1256 this->updateMidstopDependencies (draggable, write_repr);
1257 break;
1258 case POINT_RG_FOCUS:
1259 // nothing can depend on that
1260 break;
1261 case POINT_RG_MID1:
1262 this->moveOtherToDraggable (draggable->item, POINT_RG_MID2, draggable->point_i, draggable->fill_or_stroke, write_repr);
1263 break;
1264 case POINT_RG_MID2:
1265 this->moveOtherToDraggable (draggable->item, POINT_RG_MID1, draggable->point_i, draggable->fill_or_stroke, write_repr);
1266 break;
1267 default:
1268 break;
1269 }
1270 }
1271 }
1275 GrDragger::GrDragger (GrDrag *parent, NR::Point p, GrDraggable *draggable)
1276 {
1277 this->draggables = NULL;
1279 this->parent = parent;
1281 this->point = p;
1282 this->point_original = p;
1284 // create the knot
1285 this->knot = sp_knot_new (parent->desktop, NULL);
1286 this->knot->setMode(SP_KNOT_MODE_XOR);
1287 this->knot->setFill(GR_KNOT_COLOR_NORMAL, GR_KNOT_COLOR_MOUSEOVER, GR_KNOT_COLOR_MOUSEOVER);
1288 this->knot->setStroke(0x000000ff, 0x000000ff, 0x000000ff);
1289 sp_knot_update_ctrl(this->knot);
1291 // move knot to the given point
1292 sp_knot_set_position (this->knot, &p, SP_KNOT_STATE_NORMAL);
1293 sp_knot_show (this->knot);
1295 // connect knot's signals
1296 if ( (draggable) // it can be NULL if a node in unsnapped (eg. focus point unsnapped from center)
1297 // luckily, midstops never snap to other nodes so are never unsnapped...
1298 && ( (draggable->point_type == POINT_LG_MID)
1299 || (draggable->point_type == POINT_RG_MID1)
1300 || (draggable->point_type == POINT_RG_MID2) ) )
1301 {
1302 this->handler_id = g_signal_connect (G_OBJECT (this->knot), "moved", G_CALLBACK (gr_knot_moved_midpoint_handler), this);
1303 } else {
1304 this->handler_id = g_signal_connect (G_OBJECT (this->knot), "moved", G_CALLBACK (gr_knot_moved_handler), this);
1305 }
1306 g_signal_connect (G_OBJECT (this->knot), "clicked", G_CALLBACK (gr_knot_clicked_handler), this);
1307 g_signal_connect (G_OBJECT (this->knot), "doubleclicked", G_CALLBACK (gr_knot_doubleclicked_handler), this);
1308 g_signal_connect (G_OBJECT (this->knot), "grabbed", G_CALLBACK (gr_knot_grabbed_handler), this);
1309 g_signal_connect (G_OBJECT (this->knot), "ungrabbed", G_CALLBACK (gr_knot_ungrabbed_handler), this);
1311 // add the initial draggable
1312 if (draggable)
1313 this->addDraggable (draggable);
1314 updateKnotShape();
1315 }
1317 GrDragger::~GrDragger ()
1318 {
1319 // unselect if it was selected
1320 this->parent->setDeselected(this);
1322 // disconnect signals
1323 g_signal_handlers_disconnect_by_func(G_OBJECT(this->knot), (gpointer) G_CALLBACK (gr_knot_moved_handler), this);
1324 g_signal_handlers_disconnect_by_func(G_OBJECT(this->knot), (gpointer) G_CALLBACK (gr_knot_clicked_handler), this);
1325 g_signal_handlers_disconnect_by_func(G_OBJECT(this->knot), (gpointer) G_CALLBACK (gr_knot_doubleclicked_handler), this);
1326 g_signal_handlers_disconnect_by_func(G_OBJECT(this->knot), (gpointer) G_CALLBACK (gr_knot_grabbed_handler), this);
1327 g_signal_handlers_disconnect_by_func(G_OBJECT(this->knot), (gpointer) G_CALLBACK (gr_knot_ungrabbed_handler), this);
1329 /* unref should call destroy */
1330 g_object_unref (G_OBJECT (this->knot));
1332 // delete all draggables
1333 for (GSList const* i = this->draggables; i != NULL; i = i->next) {
1334 delete ((GrDraggable *) i->data);
1335 }
1336 g_slist_free (this->draggables);
1337 this->draggables = NULL;
1338 }
1340 /**
1341 Select the dragger which has the given draggable.
1342 */
1343 GrDragger *
1344 GrDrag::getDraggerFor (SPItem *item, gint point_type, gint point_i, bool fill_or_stroke)
1345 {
1346 for (GList const* i = this->draggers; i != NULL; i = i->next) {
1347 GrDragger *dragger = (GrDragger *) i->data;
1348 for (GSList const* j = dragger->draggables; j != NULL; j = j->next) {
1349 GrDraggable *da2 = (GrDraggable *) j->data;
1350 if ( (da2->item == item) &&
1351 (point_type == -1 || da2->point_type == point_type) && // -1 means this does not matter
1352 (point_i == -1 || da2->point_i == point_i) && // -1 means this does not matter
1353 (da2->fill_or_stroke == fill_or_stroke)) {
1354 return (dragger);
1355 }
1356 }
1357 }
1358 return NULL;
1359 }
1362 void
1363 GrDragger::moveOtherToDraggable (SPItem *item, gint point_type, gint point_i, bool fill_or_stroke, bool write_repr)
1364 {
1365 GrDragger *d = this->parent->getDraggerFor (item, point_type, point_i, fill_or_stroke);
1366 if (d && d != this) {
1367 d->moveThisToDraggable (item, point_type, point_i, fill_or_stroke, write_repr);
1368 }
1369 }
1372 /**
1373 Draw this dragger as selected
1374 */
1375 void
1376 GrDragger::select()
1377 {
1378 this->knot->fill [SP_KNOT_STATE_NORMAL] = GR_KNOT_COLOR_SELECTED;
1379 g_object_set (G_OBJECT (this->knot->item), "fill_color", GR_KNOT_COLOR_SELECTED, NULL);
1380 }
1382 /**
1383 Draw this dragger as normal (deselected)
1384 */
1385 void
1386 GrDragger::deselect()
1387 {
1388 this->knot->fill [SP_KNOT_STATE_NORMAL] = GR_KNOT_COLOR_NORMAL;
1389 g_object_set (G_OBJECT (this->knot->item), "fill_color", GR_KNOT_COLOR_NORMAL, NULL);
1390 }
1392 bool
1393 GrDragger::isSelected()
1394 {
1395 return g_list_find (parent->selected, this);
1396 }
1398 /**
1399 \brief Deselect all stops/draggers (private)
1400 */
1401 void
1402 GrDrag::deselect_all()
1403 {
1404 while (selected) {
1405 ( (GrDragger*) selected->data)->deselect();
1406 selected = g_list_remove(selected, selected->data);
1407 }
1408 }
1410 /**
1411 \brief Deselect all stops/draggers (public; emits signal)
1412 */
1413 void
1414 GrDrag::deselectAll()
1415 {
1416 deselect_all();
1417 this->desktop->emitToolSubselectionChanged(NULL);
1418 }
1420 /**
1421 \brief Select all stops/draggers
1422 */
1423 void
1424 GrDrag::selectAll()
1425 {
1426 for (GList *l = this->draggers; l != NULL; l = l->next) {
1427 GrDragger *d = ((GrDragger *) l->data);
1428 setSelected (d, true, true);
1429 }
1430 }
1432 /**
1433 \brief Select all stops/draggers that match the coords
1434 */
1435 void
1436 GrDrag::selectByCoords(std::vector<NR::Point> coords)
1437 {
1438 for (GList *l = this->draggers; l != NULL; l = l->next) {
1439 GrDragger *d = ((GrDragger *) l->data);
1440 for (guint k = 0; k < coords.size(); k++) {
1441 if (NR::L2 (d->point - coords[k]) < 1e-4) {
1442 setSelected (d, true, true);
1443 }
1444 }
1445 }
1446 }
1449 /**
1450 \brief Select all stops/draggers that fall within the rect
1451 */
1452 void
1453 GrDrag::selectRect(NR::Rect const &r)
1454 {
1455 for (GList *l = this->draggers; l != NULL; l = l->next) {
1456 GrDragger *d = ((GrDragger *) l->data);
1457 if (r.contains(d->point)) {
1458 setSelected (d, true, true);
1459 }
1460 }
1461 }
1463 /**
1464 \brief Select a dragger
1465 \param dragger The dragger to select
1466 \param add_to_selection If true, add to selection, otherwise deselect others
1467 \param override If true, always select this node, otherwise toggle selected status
1468 */
1469 void
1470 GrDrag::setSelected (GrDragger *dragger, bool add_to_selection, bool override)
1471 {
1472 GrDragger *seldragger = NULL;
1474 if (add_to_selection) {
1475 if (!dragger) return;
1476 if (override) {
1477 if (!g_list_find(selected, dragger)) {
1478 selected = g_list_prepend(selected, dragger);
1479 }
1480 dragger->select();
1481 seldragger = dragger;
1482 } else { // toggle
1483 if (g_list_find(selected, dragger)) {
1484 selected = g_list_remove(selected, dragger);
1485 dragger->deselect();
1486 if (selected) {
1487 seldragger = (GrDragger*) selected->data; // select the dragger that is first in the list
1488 }
1489 } else {
1490 selected = g_list_prepend(selected, dragger);
1491 dragger->select();
1492 seldragger = dragger;
1493 }
1494 }
1495 } else {
1496 deselect_all();
1497 if (dragger) {
1498 selected = g_list_prepend(selected, dragger);
1499 dragger->select();
1500 seldragger = dragger;
1501 }
1502 }
1503 if (seldragger) {
1504 this->desktop->emitToolSubselectionChanged((gpointer) seldragger);
1505 }
1506 }
1508 /**
1509 \brief Deselect a dragger
1510 \param dragger The dragger to deselect
1511 */
1512 void
1513 GrDrag::setDeselected (GrDragger *dragger)
1514 {
1515 if (g_list_find(selected, dragger)) {
1516 selected = g_list_remove(selected, dragger);
1517 dragger->deselect();
1518 }
1519 this->desktop->emitToolSubselectionChanged((gpointer) (selected ? selected->data : NULL ));
1520 }
1524 /**
1525 Create a line from p1 to p2 and add it to the lines list
1526 */
1527 void
1528 GrDrag::addLine (SPItem *item, NR::Point p1, NR::Point p2, guint32 rgba)
1529 {
1530 SPCanvasItem *line = sp_canvas_item_new(sp_desktop_controls(this->desktop),
1531 SP_TYPE_CTRLLINE, NULL);
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 NR::Maybe<NR::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()[NR::Y]);
1733 hor_levels.push_back(rect->max()[NR::Y]);
1734 hor_levels.push_back(0.5 * (rect->min()[NR::Y] + rect->max()[NR::Y]));
1735 vert_levels.push_back(rect->min()[NR::X]);
1736 vert_levels.push_back(rect->max()[NR::X]);
1737 vert_levels.push_back(0.5 * (rect->min()[NR::X] + rect->max()[NR::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 :