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>
22 #include "desktop-handles.h"
23 #include "selection.h"
24 #include "desktop.h"
25 #include "desktop-style.h"
26 #include "document.h"
27 #include "display/sp-ctrlline.h"
28 #include "xml/repr.h"
29 #include "svg/css-ostringstream.h"
30 #include "svg/svg.h"
31 #include "libnr/nr-point-fns.h"
32 #include "prefs-utils.h"
33 #include "sp-item.h"
34 #include "style.h"
35 #include "knot.h"
36 #include "sp-linear-gradient.h"
37 #include "sp-radial-gradient.h"
38 #include "gradient-chemistry.h"
39 #include "gradient-drag.h"
40 #include "sp-stop.h"
41 #include "snap.h"
42 #include "sp-namedview.h"
43 #include "selection-chemistry.h"
46 #define GR_KNOT_COLOR_NORMAL 0xffffff00
47 #define GR_KNOT_COLOR_MOUSEOVER 0xff000000
48 #define GR_KNOT_COLOR_SELECTED 0x0000ff00
50 #define GR_LINE_COLOR_FILL 0x0000ff7f
51 #define GR_LINE_COLOR_STROKE 0x9999007f
53 // screen pixels between knots when they snap:
54 #define SNAP_DIST 5
56 // absolute distance between gradient points for them to become a single dragger when the drag is created:
57 #define MERGE_DIST 0.1
59 // knot shapes corresponding to GrPointType enum
60 SPKnotShapeType gr_knot_shapes [] = {
61 SP_KNOT_SHAPE_SQUARE, //POINT_LG_BEGIN
62 SP_KNOT_SHAPE_CIRCLE, //POINT_LG_END
63 SP_KNOT_SHAPE_DIAMOND, //POINT_LG_MID
64 SP_KNOT_SHAPE_SQUARE, // POINT_RG_CENTER
65 SP_KNOT_SHAPE_CIRCLE, // POINT_RG_R1
66 SP_KNOT_SHAPE_CIRCLE, // POINT_RG_R2
67 SP_KNOT_SHAPE_CROSS, // POINT_RG_FOCUS
68 SP_KNOT_SHAPE_DIAMOND, //POINT_RG_MID1
69 SP_KNOT_SHAPE_DIAMOND //POINT_RG_MID2
70 };
72 const gchar *gr_knot_descr [] = {
73 N_("Linear gradient <b>start</b>"), //POINT_LG_BEGIN
74 N_("Linear gradient <b>end</b>"),
75 N_("Linear gradient <b>mid stop</b>"),
76 N_("Radial gradient <b>center</b>"),
77 N_("Radial gradient <b>radius</b>"),
78 N_("Radial gradient <b>radius</b>"),
79 N_("Radial gradient <b>focus</b>"), // POINT_RG_FOCUS
80 N_("Radial gradient <b>mid stop</b>"),
81 N_("Radial gradient <b>mid stop</b>")
82 };
84 static void
85 gr_drag_sel_changed(Inkscape::Selection */*selection*/, gpointer data)
86 {
87 GrDrag *drag = (GrDrag *) data;
88 drag->updateDraggers ();
89 drag->updateLines ();
90 drag->updateLevels ();
91 }
93 static void
94 gr_drag_sel_modified (Inkscape::Selection */*selection*/, guint /*flags*/, gpointer data)
95 {
96 GrDrag *drag = (GrDrag *) data;
97 if (drag->local_change) {
98 drag->local_change = false;
99 } else {
100 drag->updateDraggers ();
101 }
102 drag->updateLines ();
103 drag->updateLevels ();
104 }
106 /**
107 When a _query_style_signal is received, check that \a property requests fill/stroke/opacity (otherwise
108 skip), and fill the \a style with the averaged color of all draggables of the selected dragger, if
109 any.
110 */
111 int
112 gr_drag_style_query (SPStyle *style, int property, gpointer data)
113 {
114 GrDrag *drag = (GrDrag *) data;
116 if (property != QUERY_STYLE_PROPERTY_FILL && property != QUERY_STYLE_PROPERTY_STROKE && property != QUERY_STYLE_PROPERTY_MASTEROPACITY) {
117 return QUERY_STYLE_NOTHING;
118 }
120 if (!drag->selected) {
121 return QUERY_STYLE_NOTHING;
122 } else {
123 int ret = QUERY_STYLE_NOTHING;
125 float cf[4];
126 cf[0] = cf[1] = cf[2] = cf[3] = 0;
128 int count = 0;
130 for (GList *i = drag->selected; i != NULL; i = i->next) { // for all selected draggers
131 GrDragger *d = (GrDragger *) i->data;
132 for (GSList const* j = d->draggables; j != NULL; j = j->next) { // for all draggables of dragger
133 GrDraggable *draggable = (GrDraggable *) j->data;
135 if (ret == QUERY_STYLE_NOTHING) {
136 ret = QUERY_STYLE_SINGLE;
137 } else if (ret == QUERY_STYLE_SINGLE) {
138 ret = QUERY_STYLE_MULTIPLE_AVERAGED;
139 }
141 guint32 c = sp_item_gradient_stop_query_style (draggable->item, draggable->point_type, draggable->point_i, draggable->fill_or_stroke);
142 cf[0] += SP_RGBA32_R_F (c);
143 cf[1] += SP_RGBA32_G_F (c);
144 cf[2] += SP_RGBA32_B_F (c);
145 cf[3] += SP_RGBA32_A_F (c);
147 count ++;
148 }
149 }
151 if (count) {
152 cf[0] /= count;
153 cf[1] /= count;
154 cf[2] /= count;
155 cf[3] /= count;
157 // set both fill and stroke with our stop-color and stop-opacity
158 style->fill.clear();
159 style->fill.setColor( cf[0], cf[1], cf[2] );
160 style->fill.set = TRUE;
161 style->stroke.clear();
162 style->stroke.setColor( cf[0], cf[1], cf[2] );
163 style->stroke.set = TRUE;
165 style->fill_opacity.value = SP_SCALE24_FROM_FLOAT (1.0);
166 style->fill_opacity.set = TRUE;
167 style->stroke_opacity.value = SP_SCALE24_FROM_FLOAT (1.0);
168 style->stroke_opacity.set = TRUE;
170 style->opacity.value = SP_SCALE24_FROM_FLOAT (cf[3]);
171 style->opacity.set = TRUE;
172 }
174 return ret;
175 }
176 }
178 bool
179 gr_drag_style_set (const SPCSSAttr *css, gpointer data)
180 {
181 GrDrag *drag = (GrDrag *) data;
183 if (!drag->selected)
184 return false;
186 SPCSSAttr *stop = sp_repr_css_attr_new ();
188 // See if the css contains interesting properties, and if so, translate them into the format
189 // acceptable for gradient stops
191 // any of color properties, in order of increasing priority:
192 if (css->attribute("flood-color"))
193 sp_repr_css_set_property (stop, "stop-color", css->attribute("flood-color"));
195 if (css->attribute("lighting-color"))
196 sp_repr_css_set_property (stop, "stop-color", css->attribute("lighting-color"));
198 if (css->attribute("color"))
199 sp_repr_css_set_property (stop, "stop-color", css->attribute("color"));
201 if (css->attribute("stroke") && strcmp(css->attribute("stroke"), "none"))
202 sp_repr_css_set_property (stop, "stop-color", css->attribute("stroke"));
204 if (css->attribute("fill") && strcmp(css->attribute("fill"), "none"))
205 sp_repr_css_set_property (stop, "stop-color", css->attribute("fill"));
207 if (css->attribute("stop-color"))
208 sp_repr_css_set_property (stop, "stop-color", css->attribute("stop-color"));
211 if (css->attribute("stop-opacity")) { // direct setting of stop-opacity has priority
212 sp_repr_css_set_property (stop, "stop-opacity", css->attribute("stop-opacity"));
213 } else { // multiply all opacity properties:
214 gdouble accumulated = 1.0;
215 accumulated *= sp_svg_read_percentage(css->attribute("flood-opacity"), 1.0);
216 accumulated *= sp_svg_read_percentage(css->attribute("opacity"), 1.0);
217 accumulated *= sp_svg_read_percentage(css->attribute("stroke-opacity"), 1.0);
218 accumulated *= sp_svg_read_percentage(css->attribute("fill-opacity"), 1.0);
220 Inkscape::CSSOStringStream os;
221 os << accumulated;
222 sp_repr_css_set_property (stop, "stop-opacity", os.str().c_str());
224 if ((css->attribute("fill") && !css->attribute("stroke") && !strcmp(css->attribute("fill"), "none")) ||
225 (css->attribute("stroke") && !css->attribute("fill") && !strcmp(css->attribute("stroke"), "none")))
226 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
227 }
229 if (!stop->attributeList()) { // nothing for us here, pass it on
230 sp_repr_css_attr_unref(stop);
231 return false;
232 }
234 for (GList const* sel = drag->selected; sel != NULL; sel = sel->next) { // for all selected draggers
235 GrDragger* dragger = (GrDragger*) sel->data;
236 for (GSList const* i = dragger->draggables; i != NULL; i = i->next) { // for all draggables of dragger
237 GrDraggable *draggable = (GrDraggable *) i->data;
239 drag->local_change = true;
240 sp_item_gradient_stop_set_style (draggable->item, draggable->point_type, draggable->point_i, draggable->fill_or_stroke, stop);
241 }
242 }
244 //sp_repr_css_print(stop);
245 sp_repr_css_attr_unref(stop);
246 return true;
247 }
249 bool
250 GrDrag::copy()
251 {
252 if (!selected)
253 return false;
255 float cf[4];
256 cf[0] = cf[1] = cf[2] = cf[3] = 0;
258 int count = 0;
260 for (GList *i = selected; i != NULL; i = i->next) { // for all selected draggers
261 GrDragger *d = (GrDragger *) i->data;
262 for (GSList const* j = d->draggables; j != NULL; j = j->next) { // for all draggables of dragger
263 GrDraggable *draggable = (GrDraggable *) j->data;
265 guint32 c = sp_item_gradient_stop_query_style (draggable->item, draggable->point_type, draggable->point_i, draggable->fill_or_stroke);
266 cf[0] += SP_RGBA32_R_F (c);
267 cf[1] += SP_RGBA32_G_F (c);
268 cf[2] += SP_RGBA32_B_F (c);
269 cf[3] += SP_RGBA32_A_F (c);
271 count ++;
272 }
273 }
275 if (count) {
276 cf[0] /= count;
277 cf[1] /= count;
278 cf[2] /= count;
279 cf[3] /= count;
280 }
282 guint32 const c32 = SP_RGBA32_F_COMPOSE(cf[0], cf[1], cf[2], cf[3]);
283 gchar c[64];
285 SPCSSAttr *css = sp_repr_css_attr_new ();
286 g_snprintf(c, 64, "#%06x", c32 >> 8);
287 sp_repr_css_set_property (css, "fill", c);
288 Inkscape::CSSOStringStream os;
289 os << cf[3];
290 sp_repr_css_set_property (css, "opacity", os.str().c_str());
291 sp_set_style_clipboard (css);
293 g_snprintf(c, 64, "%06x%02x", c32 >> 8, c32 & 0x000000ff);
294 Glib::ustring text;
295 text += c;
296 if (!text.empty())
297 {
298 Glib::RefPtr<Gtk::Clipboard> refClipboard =
299 Gtk::Clipboard::get();
300 refClipboard->set_text(text);
301 }
303 return true;
304 }
306 SPStop *
307 GrDrag::addStopNearPoint (SPItem *item, NR::Point mouse_p, double tolerance)
308 {
309 gfloat offset; // type of SPStop.offset = gfloat
310 SPGradient *gradient;
311 bool fill_or_stroke = true;
312 bool r1_knot = false;
314 bool addknot = false;
315 do {
316 gradient = sp_item_gradient (item, fill_or_stroke);
317 if (SP_IS_LINEARGRADIENT(gradient)) {
318 NR::Point begin = sp_item_gradient_get_coords(item, POINT_LG_BEGIN, 0, fill_or_stroke);
319 NR::Point end = sp_item_gradient_get_coords(item, POINT_LG_END, 0, fill_or_stroke);
321 NR::Point nearest = snap_vector_midpoint (mouse_p, begin, end, 0);
322 double dist_screen = NR::L2 (mouse_p - nearest);
323 if ( dist_screen < tolerance ) {
324 // add the knot
325 offset = get_offset_between_points(nearest, begin, end);
326 addknot = true;
327 break; // break out of the while loop: add only one knot
328 }
329 } else if (SP_IS_RADIALGRADIENT(gradient)) {
330 NR::Point begin = sp_item_gradient_get_coords(item, POINT_RG_CENTER, 0, fill_or_stroke);
331 NR::Point end = sp_item_gradient_get_coords(item, POINT_RG_R1, 0, fill_or_stroke);
332 NR::Point nearest = snap_vector_midpoint (mouse_p, begin, end, 0);
333 double dist_screen = NR::L2 (mouse_p - nearest);
334 if ( dist_screen < tolerance ) {
335 offset = get_offset_between_points(nearest, begin, end);
336 addknot = true;
337 r1_knot = true;
338 break; // break out of the while loop: add only one knot
339 }
341 end = sp_item_gradient_get_coords(item, POINT_RG_R2, 0, fill_or_stroke);
342 nearest = snap_vector_midpoint (mouse_p, begin, end, 0);
343 dist_screen = NR::L2 (mouse_p - nearest);
344 if ( dist_screen < tolerance ) {
345 offset = get_offset_between_points(nearest, begin, end);
346 addknot = true;
347 r1_knot = false;
348 break; // break out of the while loop: add only one knot
349 }
350 }
351 fill_or_stroke = !fill_or_stroke;
352 } while (!fill_or_stroke && !addknot) ;
354 if (addknot) {
355 SPGradient *vector = sp_gradient_get_forked_vector_if_necessary (gradient, false);
356 SPStop* prev_stop = sp_first_stop(vector);
357 SPStop* next_stop = sp_next_stop(prev_stop);
358 guint i = 1;
359 while ( (next_stop) && (next_stop->offset < offset) ) {
360 prev_stop = next_stop;
361 next_stop = sp_next_stop(next_stop);
362 i++;
363 }
364 if (!next_stop) {
365 // logical error: the endstop should have offset 1 and should always be more than this offset here
366 return NULL;
367 }
370 SPStop *newstop = sp_vector_add_stop (vector, prev_stop, next_stop, offset);
371 sp_gradient_ensure_vector (gradient);
372 updateDraggers();
374 return newstop;
375 }
377 return NULL;
378 }
381 bool
382 GrDrag::dropColor(SPItem */*item*/, gchar *c, NR::Point p)
383 {
384 // first, see if we can drop onto one of the existing draggers
385 for (GList *i = draggers; i != NULL; i = i->next) { // for all draggables of dragger
386 GrDragger *d = (GrDragger *) i->data;
388 if (NR::L2(p - d->point)*desktop->current_zoom() < 5) {
389 SPCSSAttr *stop = sp_repr_css_attr_new ();
390 sp_repr_css_set_property (stop, "stop-color", c);
391 sp_repr_css_set_property (stop, "stop-opacity", "1");
392 for (GSList *j = d->draggables; j != NULL; j = j->next) { // for all draggables of dragger
393 GrDraggable *draggable = (GrDraggable *) j->data;
394 local_change = true;
395 sp_item_gradient_stop_set_style (draggable->item, draggable->point_type, draggable->point_i, draggable->fill_or_stroke, stop);
396 }
397 sp_repr_css_attr_unref(stop);
398 return true;
399 }
400 }
402 // now see if we're over line and create a new stop
403 bool over_line = false;
404 SPCtrlLine *line = NULL;
405 if (lines) {
406 for (GSList *l = lines; (l != NULL) && (!over_line); l = l->next) {
407 line = (SPCtrlLine*) l->data;
408 NR::Point nearest = snap_vector_midpoint (p, line->s, line->e, 0);
409 double dist_screen = NR::L2 (p - nearest) * desktop->current_zoom();
410 if (line->item && dist_screen < 5) {
411 SPStop *stop = addStopNearPoint (line->item, p, 5/desktop->current_zoom());
412 if (stop) {
413 SPCSSAttr *css = sp_repr_css_attr_new ();
414 sp_repr_css_set_property (css, "stop-color", c);
415 sp_repr_css_set_property (css, "stop-opacity", "1");
416 sp_repr_css_change (SP_OBJECT_REPR (stop), css, "style");
417 return true;
418 }
419 }
420 }
421 }
423 return false;
424 }
427 GrDrag::GrDrag(SPDesktop *desktop) {
429 this->desktop = desktop;
431 this->selection = sp_desktop_selection(desktop);
433 this->draggers = NULL;
434 this->lines = NULL;
435 this->selected = NULL;
437 this->hor_levels.clear();
438 this->vert_levels.clear();
440 this->local_change = false;
442 this->sel_changed_connection = this->selection->connectChanged(
443 sigc::bind (
444 sigc::ptr_fun(&gr_drag_sel_changed),
445 (gpointer)this )
447 );
448 this->sel_modified_connection = this->selection->connectModified(
449 sigc::bind(
450 sigc::ptr_fun(&gr_drag_sel_modified),
451 (gpointer)this )
452 );
454 this->style_set_connection = this->desktop->connectSetStyle(
455 sigc::bind(
456 sigc::ptr_fun(&gr_drag_style_set),
457 (gpointer)this )
458 );
460 this->style_query_connection = this->desktop->connectQueryStyle(
461 sigc::bind(
462 sigc::ptr_fun(&gr_drag_style_query),
463 (gpointer)this )
464 );
466 this->updateDraggers ();
467 this->updateLines ();
468 this->updateLevels ();
470 if (desktop->gr_item) {
471 this->setSelected (getDraggerFor (desktop->gr_item, desktop->gr_point_type, desktop->gr_point_i, desktop->gr_fill_or_stroke));
472 }
473 }
475 GrDrag::~GrDrag()
476 {
477 this->sel_changed_connection.disconnect();
478 this->sel_modified_connection.disconnect();
479 this->style_set_connection.disconnect();
480 this->style_query_connection.disconnect();
482 if (this->selected) {
483 GrDraggable *draggable = (GrDraggable *) ((GrDragger*)this->selected->data)->draggables->data;
484 desktop->gr_item = draggable->item;
485 desktop->gr_point_type = draggable->point_type;
486 desktop->gr_point_i = draggable->point_i;
487 desktop->gr_fill_or_stroke = draggable->fill_or_stroke;
488 } else {
489 desktop->gr_item = NULL;
490 desktop->gr_point_type = 0;
491 desktop->gr_point_i = 0;
492 desktop->gr_fill_or_stroke = true;
493 }
495 deselect_all();
496 for (GList *l = this->draggers; l != NULL; l = l->next) {
497 delete ((GrDragger *) l->data);
498 }
499 g_list_free (this->draggers);
500 this->draggers = NULL;
501 this->selected = NULL;
503 for (GSList *l = this->lines; l != NULL; l = l->next) {
504 gtk_object_destroy( GTK_OBJECT (l->data));
505 }
506 g_slist_free (this->lines);
507 this->lines = NULL;
508 }
510 GrDraggable::GrDraggable (SPItem *item, guint point_type, guint point_i, bool fill_or_stroke)
511 {
512 this->item = item;
513 this->point_type = point_type;
514 this->point_i = point_i;
515 this->fill_or_stroke = fill_or_stroke;
517 g_object_ref (G_OBJECT (this->item));
518 }
520 GrDraggable::~GrDraggable ()
521 {
522 g_object_unref (G_OBJECT (this->item));
523 }
526 SPObject *
527 GrDraggable::getServer ()
528 {
529 if (!item)
530 return NULL;
532 SPObject *server = NULL;
533 if (fill_or_stroke)
534 server = SP_OBJECT_STYLE_FILL_SERVER (item);
535 else
536 server = SP_OBJECT_STYLE_STROKE_SERVER (item);
538 return server;
539 }
541 static void
542 gr_knot_moved_handler(SPKnot *knot, NR::Point const *ppointer, guint state, gpointer data)
543 {
544 GrDragger *dragger = (GrDragger *) data;
545 GrDrag *drag = dragger->parent;
547 NR::Point p = *ppointer;
549 // FIXME: take from prefs
550 double snap_dist = SNAP_DIST / dragger->parent->desktop->current_zoom();
552 if (state & GDK_SHIFT_MASK) {
553 // with Shift; unsnap if we carry more than one draggable
554 if (dragger->draggables && dragger->draggables->next) {
555 // create a new dragger
556 GrDragger *dr_new = new GrDragger (dragger->parent, dragger->point, NULL);
557 dragger->parent->draggers = g_list_prepend (dragger->parent->draggers, dr_new);
558 // relink to it all but the first draggable in the list
559 for (GSList const* i = dragger->draggables->next; i != NULL; i = i->next) {
560 GrDraggable *draggable = (GrDraggable *) i->data;
561 dr_new->addDraggable (draggable);
562 }
563 dr_new->updateKnotShape();
564 g_slist_free (dragger->draggables->next);
565 dragger->draggables->next = NULL;
566 dragger->updateKnotShape();
567 dragger->updateTip();
568 }
569 } else if (!(state & GDK_CONTROL_MASK)) {
570 // without Shift or Ctrl; see if we need to snap to another dragger
571 for (GList *di = dragger->parent->draggers; di != NULL; di = di->next) {
572 GrDragger *d_new = (GrDragger *) di->data;
573 if (dragger->mayMerge(d_new) && NR::L2 (d_new->point - p) < snap_dist) {
575 // Merge draggers:
576 for (GSList const* i = dragger->draggables; i != NULL; i = i->next) { // for all draggables of dragger
577 GrDraggable *draggable = (GrDraggable *) i->data;
578 // copy draggable to d_new:
579 GrDraggable *da_new = new GrDraggable (draggable->item, draggable->point_type, draggable->point_i, draggable->fill_or_stroke);
580 d_new->addDraggable (da_new);
581 }
583 // unlink and delete this dragger
584 dragger->parent->draggers = g_list_remove (dragger->parent->draggers, dragger);
585 delete dragger;
587 // update the new merged dragger
588 d_new->fireDraggables(true, false, true);
589 d_new->parent->updateLines();
590 d_new->parent->setSelected (d_new);
591 d_new->updateKnotShape ();
592 d_new->updateTip ();
593 d_new->updateDependencies(true);
594 sp_document_done (sp_desktop_document (d_new->parent->desktop), SP_VERB_CONTEXT_GRADIENT,
595 _("Merge gradient handles"));
596 return;
597 }
598 }
599 }
601 if (!((state & GDK_SHIFT_MASK) || ((state & GDK_CONTROL_MASK) && (state & GDK_MOD1_MASK)))) {
602 // Try snapping to the grid or guides
603 SnapManager const &m = dragger->parent->desktop->namedview->snap_manager;
604 Inkscape::SnappedPoint s = m.freeSnap(Inkscape::Snapper::SNAPPOINT_NODE, p, NULL);
605 if (s.getDistance() < 1e6) {
606 p = s.getPoint();
607 sp_knot_moveto (knot, &p);
608 } else {
609 // No snapping so far, let's see if we need to snap to any of the levels
610 for (guint i = 0; i < dragger->parent->hor_levels.size(); i++) {
611 if (fabs(p[NR::Y] - dragger->parent->hor_levels[i]) < snap_dist) {
612 p[NR::Y] = dragger->parent->hor_levels[i];
613 sp_knot_moveto (knot, &p);
614 }
615 }
616 for (guint i = 0; i < dragger->parent->vert_levels.size(); i++) {
617 if (fabs(p[NR::X] - dragger->parent->vert_levels[i]) < snap_dist) {
618 p[NR::X] = dragger->parent->vert_levels[i];
619 sp_knot_moveto (knot, &p);
620 }
621 }
622 }
623 }
625 if (state & GDK_CONTROL_MASK) {
626 unsigned snaps = abs(prefs_get_int_attribute("options.rotationsnapsperpi", "value", 12));
627 /* 0 means no snapping. */
629 // This list will store snap vectors from all draggables of dragger
630 GSList *snap_vectors = NULL;
632 for (GSList const* i = dragger->draggables; i != NULL; i = i->next) {
633 GrDraggable *draggable = (GrDraggable *) i->data;
635 NR::Point *dr_snap = NULL;
637 if (draggable->point_type == POINT_LG_BEGIN || draggable->point_type == POINT_LG_END) {
638 for (GList *di = dragger->parent->draggers; di != NULL; di = di->next) {
639 GrDragger *d_new = (GrDragger *) di->data;
640 if (d_new == dragger)
641 continue;
642 if (d_new->isA (draggable->item,
643 draggable->point_type == POINT_LG_BEGIN? POINT_LG_END : POINT_LG_BEGIN,
644 draggable->fill_or_stroke)) {
645 // found the other end of the linear gradient;
646 if (state & GDK_SHIFT_MASK) {
647 // moving linear around center
648 NR::Point center = NR::Point (0.5*(d_new->point + dragger->point));
649 dr_snap = ¢er;
650 } else {
651 // moving linear around the other end
652 dr_snap = &d_new->point;
653 }
654 }
655 }
656 } else if (draggable->point_type == POINT_RG_R1 || draggable->point_type == POINT_RG_R2 || draggable->point_type == POINT_RG_FOCUS) {
657 for (GList *di = dragger->parent->draggers; di != NULL; di = di->next) {
658 GrDragger *d_new = (GrDragger *) di->data;
659 if (d_new == dragger)
660 continue;
661 if (d_new->isA (draggable->item,
662 POINT_RG_CENTER,
663 draggable->fill_or_stroke)) {
664 // found the center of the radial gradient;
665 dr_snap = &(d_new->point);
666 }
667 }
668 } else if (draggable->point_type == POINT_RG_CENTER) {
669 // radial center snaps to hor/vert relative to its original position
670 dr_snap = &(dragger->point_original);
671 }
673 NR::Point *snap_vector = NULL;
674 if (dr_snap) {
675 if (state & GDK_MOD1_MASK) {
676 // with Alt, snap to the original angle and its perpendiculars
677 snap_vector = get_snap_vector (p, *dr_snap, M_PI/2, NR::atan2 (dragger->point_original - *dr_snap));
678 } else {
679 // with Ctrl, snap to M_PI/snaps
680 snap_vector = get_snap_vector (p, *dr_snap, M_PI/snaps, 0);
681 }
682 }
683 if (snap_vector) {
684 snap_vectors = g_slist_prepend (snap_vectors, snap_vector);
685 }
686 }
688 // Move by the smallest of snap vectors:
689 NR::Point move(9999, 9999);
690 for (GSList const *i = snap_vectors; i != NULL; i = i->next) {
691 NR::Point *snap_vector = (NR::Point *) i->data;
692 if (NR::L2(*snap_vector) < NR::L2(move))
693 move = *snap_vector;
694 }
695 if (move[NR::X] < 9999) {
696 p += move;
697 sp_knot_moveto (knot, &p);
698 }
700 g_slist_free(snap_vectors);
701 }
703 drag->keep_selection = (bool) g_list_find(drag->selected, dragger);
704 bool scale_radial = (state & GDK_CONTROL_MASK) && (state & GDK_SHIFT_MASK);
706 if (drag->keep_selection) {
707 NR::Point diff = p - dragger->point;
708 drag->selected_move_nowrite (diff[NR::X], diff[NR::Y], scale_radial);
709 } else {
710 dragger->point = p;
711 dragger->fireDraggables (false, scale_radial);
712 dragger->updateDependencies(false);
713 }
715 }
718 static void
719 gr_midpoint_limits(GrDragger *dragger, SPObject *server, NR::Point *begin, NR::Point *end, NR::Point *low_lim, NR::Point *high_lim, GSList **moving)
720 {
722 GrDrag *drag = dragger->parent;
723 // a midpoint dragger can (logically) only contain one GrDraggable
724 GrDraggable *draggable = (GrDraggable *) dragger->draggables->data;
726 // get begin and end points between which dragging is allowed:
727 // the draglimits are between knot(lowest_i - 1) and knot(highest_i + 1)
728 *moving = g_slist_append(*moving, dragger);
730 guint lowest_i = draggable->point_i;
731 guint highest_i = draggable->point_i;
732 GrDragger *lowest_dragger = dragger;
733 GrDragger *highest_dragger = dragger;
734 if (dragger->isSelected()) {
735 GrDragger* d_add;
736 while ( true )
737 {
738 d_add = drag->getDraggerFor(draggable->item, draggable->point_type, lowest_i - 1, draggable->fill_or_stroke);
739 if ( d_add && g_list_find(drag->selected, d_add) ) {
740 lowest_i = lowest_i - 1;
741 *moving = g_slist_prepend(*moving, d_add);
742 lowest_dragger = d_add;
743 } else {
744 break;
745 }
746 }
748 while ( true )
749 {
750 d_add = drag->getDraggerFor(draggable->item, draggable->point_type, highest_i + 1, draggable->fill_or_stroke);
751 if ( d_add && g_list_find(drag->selected, d_add) ) {
752 highest_i = highest_i + 1;
753 *moving = g_slist_append(*moving, d_add);
754 highest_dragger = d_add;
755 } else {
756 break;
757 }
758 }
759 }
761 if ( SP_IS_LINEARGRADIENT(server) ) {
762 guint num = SP_LINEARGRADIENT(server)->vector.stops.size();
763 GrDragger *d_temp;
764 if (lowest_i == 1) {
765 d_temp = drag->getDraggerFor (draggable->item, POINT_LG_BEGIN, 0, draggable->fill_or_stroke);
766 } else {
767 d_temp = drag->getDraggerFor (draggable->item, POINT_LG_MID, lowest_i - 1, draggable->fill_or_stroke);
768 }
769 if (d_temp)
770 *begin = d_temp->point;
772 d_temp = drag->getDraggerFor (draggable->item, POINT_LG_MID, highest_i + 1, draggable->fill_or_stroke);
773 if (d_temp == NULL) {
774 d_temp = drag->getDraggerFor (draggable->item, POINT_LG_END, num-1, draggable->fill_or_stroke);
775 }
776 if (d_temp)
777 *end = d_temp->point;
778 } else if ( SP_IS_RADIALGRADIENT(server) ) {
779 guint num = SP_RADIALGRADIENT(server)->vector.stops.size();
780 GrDragger *d_temp;
781 if (lowest_i == 1) {
782 d_temp = drag->getDraggerFor (draggable->item, POINT_RG_CENTER, 0, draggable->fill_or_stroke);
783 } else {
784 d_temp = drag->getDraggerFor (draggable->item, draggable->point_type, lowest_i - 1, draggable->fill_or_stroke);
785 }
786 if (d_temp)
787 *begin = d_temp->point;
789 d_temp = drag->getDraggerFor (draggable->item, draggable->point_type, highest_i + 1, draggable->fill_or_stroke);
790 if (d_temp == NULL) {
791 d_temp = drag->getDraggerFor (draggable->item, (draggable->point_type==POINT_RG_MID1) ? POINT_RG_R1 : POINT_RG_R2, num-1, draggable->fill_or_stroke);
792 }
793 if (d_temp)
794 *end = d_temp->point;
795 }
797 *low_lim = dragger->point - (lowest_dragger->point - *begin);
798 *high_lim = dragger->point - (highest_dragger->point - *end);
799 }
803 /**
804 Called when a midpoint knot is dragged.
805 */
806 static void
807 gr_knot_moved_midpoint_handler(SPKnot */*knot*/, NR::Point const *ppointer, guint state, gpointer data)
808 {
809 GrDragger *dragger = (GrDragger *) data;
810 GrDrag *drag = dragger->parent;
811 // a midpoint dragger can (logically) only contain one GrDraggable
812 GrDraggable *draggable = (GrDraggable *) dragger->draggables->data;
814 // FIXME: take from prefs
815 double snap_fraction = 0.1;
817 NR::Point p = *ppointer;
818 NR::Point begin(0,0), end(0,0);
819 NR::Point low_lim(0,0), high_lim(0,0);
821 SPObject *server = draggable->getServer();
823 GSList *moving = NULL;
824 gr_midpoint_limits(dragger, server, &begin, &end, &low_lim, &high_lim, &moving);
826 if (state & GDK_CONTROL_MASK) {
827 p = snap_vector_midpoint (p, low_lim, high_lim, snap_fraction);
828 } else {
829 p = snap_vector_midpoint (p, low_lim, high_lim, 0);
830 }
831 NR::Point displacement = p - dragger->point;
833 for (GSList const* i = moving; i != NULL; i = i->next) {
834 GrDragger *drg = (GrDragger*) i->data;
835 SPKnot *drgknot = drg->knot;
836 NR::Point this_move = displacement;
837 if (state & GDK_MOD1_MASK) {
838 // FIXME: unify all these profiles (here, in nodepath, in tweak) in one place
839 double alpha = 1.0;
840 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
841 double x = NR::L2(drg->point - dragger->point)/NR::L2(end - dragger->point);
842 this_move = (0.5 * cos (M_PI * (pow(x, alpha))) + 0.5) * this_move;
843 } else { // drg is on the begin side from dragger
844 double x = NR::L2(drg->point - dragger->point)/NR::L2(begin - dragger->point);
845 this_move = (0.5 * cos (M_PI * (pow(x, alpha))) + 0.5) * this_move;
846 }
847 }
848 drg->point += this_move;
849 sp_knot_moveto (drgknot, & drg->point);
850 drg->fireDraggables (false);
851 drg->updateDependencies(false);
852 }
854 g_slist_free(moving);
856 drag->keep_selection = dragger->isSelected();
857 }
861 static void
862 gr_knot_grabbed_handler (SPKnot */*knot*/, unsigned int /*state*/, gpointer data)
863 {
864 GrDragger *dragger = (GrDragger *) data;
866 sp_canvas_force_full_redraw_after_interruptions(dragger->parent->desktop->canvas, 5);
867 }
869 /**
870 Called when the mouse releases a dragger knot; changes gradient writing to repr, updates other draggers if needed
871 */
872 static void
873 gr_knot_ungrabbed_handler (SPKnot *knot, unsigned int state, gpointer data)
874 {
875 GrDragger *dragger = (GrDragger *) data;
877 sp_canvas_end_forced_full_redraws(dragger->parent->desktop->canvas);
879 dragger->point_original = dragger->point = knot->pos;
881 if ((state & GDK_CONTROL_MASK) && (state & GDK_SHIFT_MASK)) {
882 dragger->fireDraggables (true, true);
883 } else {
884 dragger->fireDraggables (true);
885 }
887 for (GList *i = dragger->parent->selected; i != NULL; i = i->next) {
888 GrDragger *d = (GrDragger *) i->data;
889 if (d == dragger)
890 continue;
891 d->fireDraggables (true);
892 }
894 // make this dragger selected
895 if (!dragger->parent->keep_selection) {
896 dragger->parent->setSelected (dragger);
897 }
898 dragger->parent->keep_selection = false;
900 dragger->updateDependencies(true);
902 // we did an undoable action
903 sp_document_done (sp_desktop_document (dragger->parent->desktop), SP_VERB_CONTEXT_GRADIENT,
904 _("Move gradient handle"));
905 }
907 /**
908 Called when a dragger knot is clicked; selects the dragger or deletes it depending on the
909 state of the keyboard keys
910 */
911 static void
912 gr_knot_clicked_handler(SPKnot */*knot*/, guint state, gpointer data)
913 {
914 GrDragger *dragger = (GrDragger *) data;
915 GrDraggable *draggable = (GrDraggable *) dragger->draggables->data;
916 if (!draggable) return;
918 if ( (state & GDK_CONTROL_MASK) && (state & GDK_MOD1_MASK ) ) {
919 // delete this knot from vector
920 SPGradient *gradient = sp_item_gradient (draggable->item, draggable->fill_or_stroke);
921 gradient = sp_gradient_get_vector (gradient, false);
922 if (gradient->vector.stops.size() > 2) { // 2 is the minimum
923 SPStop *stop = NULL;
924 switch (draggable->point_type) { // if we delete first or last stop, move the next/previous to the edge
925 case POINT_LG_BEGIN:
926 case POINT_RG_CENTER:
927 stop = sp_first_stop(gradient);
928 {
929 SPStop *next = sp_next_stop (stop);
930 if (next) {
931 next->offset = 0;
932 sp_repr_set_css_double (SP_OBJECT_REPR (next), "offset", 0);
933 }
934 }
935 break;
936 case POINT_LG_END:
937 case POINT_RG_R1:
938 case POINT_RG_R2:
939 stop = sp_last_stop(gradient);
940 {
941 SPStop *prev = sp_prev_stop (stop, gradient);
942 if (prev) {
943 prev->offset = 1;
944 sp_repr_set_css_double (SP_OBJECT_REPR (prev), "offset", 1);
945 }
946 }
947 break;
948 case POINT_LG_MID:
949 case POINT_RG_MID1:
950 case POINT_RG_MID2:
951 stop = sp_get_stop_i(gradient, draggable->point_i);
952 break;
953 }
955 SP_OBJECT_REPR(gradient)->removeChild(SP_OBJECT_REPR(stop));
956 sp_document_done (SP_OBJECT_DOCUMENT (gradient), SP_VERB_CONTEXT_GRADIENT,
957 _("Delete gradient stop"));
958 }
959 } else {
960 // select the dragger
961 dragger->point_original = dragger->point;
963 if ( state & GDK_SHIFT_MASK ) {
964 dragger->parent->setSelected (dragger, true, false);
965 } else {
966 dragger->parent->setSelected (dragger);
967 }
968 }
969 }
971 /**
972 Called when a dragger knot is doubleclicked; opens gradient editor with the stop from the first draggable
973 */
974 static void
975 gr_knot_doubleclicked_handler (SPKnot */*knot*/, guint /*state*/, gpointer data)
976 {
977 GrDragger *dragger = (GrDragger *) data;
979 dragger->point_original = dragger->point;
981 if (dragger->draggables == NULL)
982 return;
984 GrDraggable *draggable = (GrDraggable *) dragger->draggables->data;
985 sp_item_gradient_edit_stop (draggable->item, draggable->point_type, draggable->point_i, draggable->fill_or_stroke);
986 }
988 /**
989 Act upon all draggables of the dragger, setting them to the dragger's point
990 */
991 void
992 GrDragger::fireDraggables (bool write_repr, bool scale_radial, bool merging_focus)
993 {
994 for (GSList const* i = this->draggables; i != NULL; i = i->next) {
995 GrDraggable *draggable = (GrDraggable *) i->data;
997 // set local_change flag so that selection_changed callback does not regenerate draggers
998 this->parent->local_change = true;
1000 // change gradient, optionally writing to repr; prevent focus from moving if it's snapped
1001 // to the center, unless it's the first update upon merge when we must snap it to the point
1002 if (merging_focus ||
1003 !(draggable->point_type == POINT_RG_FOCUS && this->isA(draggable->item, POINT_RG_CENTER, draggable->point_i, draggable->fill_or_stroke)))
1004 {
1005 sp_item_gradient_set_coords (draggable->item, draggable->point_type, draggable->point_i, this->point, draggable->fill_or_stroke, write_repr, scale_radial);
1006 }
1007 }
1008 }
1010 /**
1011 Checks if the dragger has a draggable with this point_type
1012 */
1013 bool
1014 GrDragger::isA (gint point_type)
1015 {
1016 for (GSList const* i = this->draggables; i != NULL; i = i->next) {
1017 GrDraggable *draggable = (GrDraggable *) i->data;
1018 if (draggable->point_type == point_type) {
1019 return true;
1020 }
1021 }
1022 return false;
1023 }
1025 /**
1026 Checks if the dragger has a draggable with this item, point_type + point_i (number), fill_or_stroke
1027 */
1028 bool
1029 GrDragger::isA (SPItem *item, gint point_type, gint point_i, bool fill_or_stroke)
1030 {
1031 for (GSList const* i = this->draggables; i != NULL; i = i->next) {
1032 GrDraggable *draggable = (GrDraggable *) i->data;
1033 if ( (draggable->point_type == point_type) && (draggable->point_i == point_i) && (draggable->item == item) && (draggable->fill_or_stroke == fill_or_stroke) ) {
1034 return true;
1035 }
1036 }
1037 return false;
1038 }
1040 /**
1041 Checks if the dragger has a draggable with this item, point_type, fill_or_stroke
1042 */
1043 bool
1044 GrDragger::isA (SPItem *item, gint point_type, bool fill_or_stroke)
1045 {
1046 for (GSList const* i = this->draggables; i != NULL; i = i->next) {
1047 GrDraggable *draggable = (GrDraggable *) i->data;
1048 if ( (draggable->point_type == point_type) && (draggable->item == item) && (draggable->fill_or_stroke == fill_or_stroke) ) {
1049 return true;
1050 }
1051 }
1052 return false;
1053 }
1055 bool
1056 GrDraggable::mayMerge (GrDraggable *da2)
1057 {
1058 if ((this->item == da2->item) && (this->fill_or_stroke == da2->fill_or_stroke)) {
1059 // we must not merge the points of the same gradient!
1060 if (!((this->point_type == POINT_RG_FOCUS && da2->point_type == POINT_RG_CENTER) ||
1061 (this->point_type == POINT_RG_CENTER && da2->point_type == POINT_RG_FOCUS))) {
1062 // except that we can snap center and focus together
1063 return false;
1064 }
1065 }
1066 // disable merging of midpoints.
1067 if ( (this->point_type == POINT_LG_MID) || (da2->point_type == POINT_LG_MID)
1068 || (this->point_type == POINT_RG_MID1) || (da2->point_type == POINT_RG_MID1)
1069 || (this->point_type == POINT_RG_MID2) || (da2->point_type == POINT_RG_MID2) )
1070 return false;
1072 return true;
1073 }
1075 bool
1076 GrDragger::mayMerge (GrDragger *other)
1077 {
1078 if (this == other)
1079 return false;
1081 for (GSList const* i = this->draggables; i != NULL; i = i->next) { // for all draggables of this
1082 GrDraggable *da1 = (GrDraggable *) i->data;
1083 for (GSList const* j = other->draggables; j != NULL; j = j->next) { // for all draggables of other
1084 GrDraggable *da2 = (GrDraggable *) j->data;
1085 if (!da1->mayMerge(da2))
1086 return false;
1087 }
1088 }
1089 return true;
1090 }
1092 bool
1093 GrDragger::mayMerge (GrDraggable *da2)
1094 {
1095 for (GSList const* i = this->draggables; i != NULL; i = i->next) { // for all draggables of this
1096 GrDraggable *da1 = (GrDraggable *) i->data;
1097 if (!da1->mayMerge(da2))
1098 return false;
1099 }
1100 return true;
1101 }
1103 /**
1104 Updates the statusbar tip of the dragger knot, based on its draggables
1105 */
1106 void
1107 GrDragger::updateTip ()
1108 {
1109 if (this->knot && this->knot->tip) {
1110 g_free (this->knot->tip);
1111 this->knot->tip = NULL;
1112 }
1114 if (g_slist_length (this->draggables) == 1) {
1115 GrDraggable *draggable = (GrDraggable *) this->draggables->data;
1116 char *item_desc = sp_item_description(draggable->item);
1117 switch (draggable->point_type) {
1118 case POINT_LG_MID:
1119 case POINT_RG_MID1:
1120 case POINT_RG_MID2:
1121 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"),
1122 _(gr_knot_descr[draggable->point_type]),
1123 draggable->point_i,
1124 item_desc,
1125 draggable->fill_or_stroke == false ? _(" (stroke)") : "");
1126 break;
1128 default:
1129 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"),
1130 _(gr_knot_descr[draggable->point_type]),
1131 item_desc,
1132 draggable->fill_or_stroke == false ? _(" (stroke)") : "");
1133 break;
1134 }
1135 g_free(item_desc);
1136 } else if (g_slist_length (draggables) == 2 && isA (POINT_RG_CENTER) && isA (POINT_RG_FOCUS)) {
1137 this->knot->tip = g_strdup_printf (_("Radial gradient <b>center</b> and <b>focus</b>; drag with <b>Shift</b> to separate focus"));
1138 } else {
1139 int length = g_slist_length (this->draggables);
1140 this->knot->tip = g_strdup_printf (ngettext("Gradient point shared by <b>%d</b> gradient; drag with <b>Shift</b> to separate",
1141 "Gradient point shared by <b>%d</b> gradients; drag with <b>Shift</b> to separate",
1142 length),
1143 length);
1144 }
1145 }
1147 /**
1148 Adds a draggable to the dragger
1149 */
1150 void
1151 GrDragger::updateKnotShape ()
1152 {
1153 if (!draggables)
1154 return;
1155 GrDraggable *last = (GrDraggable *) g_slist_last(draggables)->data;
1156 g_object_set (G_OBJECT (this->knot->item), "shape", gr_knot_shapes[last->point_type], NULL);
1157 }
1159 /**
1160 Adds a draggable to the dragger
1161 */
1162 void
1163 GrDragger::addDraggable (GrDraggable *draggable)
1164 {
1165 this->draggables = g_slist_prepend (this->draggables, draggable);
1167 this->updateTip();
1168 }
1171 /**
1172 Moves this dragger to the point of the given draggable, acting upon all other draggables
1173 */
1174 void
1175 GrDragger::moveThisToDraggable (SPItem *item, gint point_type, gint point_i, bool fill_or_stroke, bool write_repr)
1176 {
1177 this->point = sp_item_gradient_get_coords (item, point_type, point_i, fill_or_stroke);
1178 this->point_original = this->point;
1180 sp_knot_moveto (this->knot, &(this->point));
1182 for (GSList const* i = this->draggables; i != NULL; i = i->next) {
1183 GrDraggable *da = (GrDraggable *) i->data;
1184 if ( (da->item == item) &&
1185 (point_type == -1 || da->point_type == point_type) &&
1186 (point_i == -1 || da->point_i == point_i) &&
1187 (da->fill_or_stroke == fill_or_stroke) ) {
1188 continue;
1189 }
1190 sp_item_gradient_set_coords (da->item, da->point_type, da->point_i, this->point, da->fill_or_stroke, write_repr, false);
1191 }
1192 // FIXME: here we should also call this->updateDependencies(write_repr); to propagate updating, but how to prevent loops?
1193 }
1196 /**
1197 Moves all midstop draggables that depend on this one
1198 */
1199 void
1200 GrDragger::updateMidstopDependencies (GrDraggable *draggable, bool write_repr) {
1201 SPObject *server = draggable->getServer();
1202 if (!server)
1203 return;
1204 guint num = SP_GRADIENT(server)->vector.stops.size();
1205 if (num <= 2) return;
1207 if ( SP_IS_LINEARGRADIENT(server) ) {
1208 for ( guint i = 1; i < num - 1; i++ ) {
1209 this->moveOtherToDraggable (draggable->item, POINT_LG_MID, i, draggable->fill_or_stroke, write_repr);
1210 }
1211 } else if ( SP_IS_RADIALGRADIENT(server) ) {
1212 for ( guint i = 1; i < num - 1; i++ ) {
1213 this->moveOtherToDraggable (draggable->item, POINT_RG_MID1, i, draggable->fill_or_stroke, write_repr);
1214 this->moveOtherToDraggable (draggable->item, POINT_RG_MID2, i, draggable->fill_or_stroke, write_repr);
1215 }
1216 }
1217 }
1220 /**
1221 Moves all draggables that depend on this one
1222 */
1223 void
1224 GrDragger::updateDependencies (bool write_repr)
1225 {
1226 for (GSList const* i = this->draggables; i != NULL; i = i->next) {
1227 GrDraggable *draggable = (GrDraggable *) i->data;
1228 switch (draggable->point_type) {
1229 case POINT_LG_BEGIN:
1230 {
1231 // the end point is dependent only when dragging with ctrl+shift
1232 this->moveOtherToDraggable (draggable->item, POINT_LG_END, -1, draggable->fill_or_stroke, write_repr);
1234 this->updateMidstopDependencies (draggable, write_repr);
1235 }
1236 break;
1237 case POINT_LG_END:
1238 {
1239 // the begin point is dependent only when dragging with ctrl+shift
1240 this->moveOtherToDraggable (draggable->item, POINT_LG_BEGIN, 0, draggable->fill_or_stroke, write_repr);
1242 this->updateMidstopDependencies (draggable, write_repr);
1243 }
1244 break;
1245 case POINT_LG_MID:
1246 // no other nodes depend on mid points.
1247 break;
1248 case POINT_RG_R2:
1249 this->moveOtherToDraggable (draggable->item, POINT_RG_R1, -1, draggable->fill_or_stroke, write_repr);
1250 this->moveOtherToDraggable (draggable->item, POINT_RG_FOCUS, -1, draggable->fill_or_stroke, write_repr);
1251 this->updateMidstopDependencies (draggable, write_repr);
1252 break;
1253 case POINT_RG_R1:
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_CENTER:
1259 this->moveOtherToDraggable (draggable->item, POINT_RG_R1, -1, draggable->fill_or_stroke, write_repr);
1260 this->moveOtherToDraggable (draggable->item, POINT_RG_R2, -1, draggable->fill_or_stroke, write_repr);
1261 this->moveOtherToDraggable (draggable->item, POINT_RG_FOCUS, -1, draggable->fill_or_stroke, write_repr);
1262 this->updateMidstopDependencies (draggable, write_repr);
1263 break;
1264 case POINT_RG_FOCUS:
1265 // nothing can depend on that
1266 break;
1267 case POINT_RG_MID1:
1268 this->moveOtherToDraggable (draggable->item, POINT_RG_MID2, draggable->point_i, draggable->fill_or_stroke, write_repr);
1269 break;
1270 case POINT_RG_MID2:
1271 this->moveOtherToDraggable (draggable->item, POINT_RG_MID1, draggable->point_i, draggable->fill_or_stroke, write_repr);
1272 break;
1273 default:
1274 break;
1275 }
1276 }
1277 }
1281 GrDragger::GrDragger (GrDrag *parent, NR::Point p, GrDraggable *draggable)
1282 {
1283 this->draggables = NULL;
1285 this->parent = parent;
1287 this->point = p;
1288 this->point_original = p;
1290 // create the knot
1291 this->knot = sp_knot_new (parent->desktop, NULL);
1292 this->knot->setMode(SP_KNOT_MODE_XOR);
1293 this->knot->setFill(GR_KNOT_COLOR_NORMAL, GR_KNOT_COLOR_MOUSEOVER, GR_KNOT_COLOR_MOUSEOVER);
1294 this->knot->setStroke(0x000000ff, 0x000000ff, 0x000000ff);
1295 sp_knot_update_ctrl(this->knot);
1297 // move knot to the given point
1298 sp_knot_set_position (this->knot, &p, SP_KNOT_STATE_NORMAL);
1299 sp_knot_show (this->knot);
1301 // connect knot's signals
1302 if ( (draggable) // it can be NULL if a node in unsnapped (eg. focus point unsnapped from center)
1303 // luckily, midstops never snap to other nodes so are never unsnapped...
1304 && ( (draggable->point_type == POINT_LG_MID)
1305 || (draggable->point_type == POINT_RG_MID1)
1306 || (draggable->point_type == POINT_RG_MID2) ) )
1307 {
1308 this->handler_id = g_signal_connect (G_OBJECT (this->knot), "moved", G_CALLBACK (gr_knot_moved_midpoint_handler), this);
1309 } else {
1310 this->handler_id = g_signal_connect (G_OBJECT (this->knot), "moved", G_CALLBACK (gr_knot_moved_handler), this);
1311 }
1312 g_signal_connect (G_OBJECT (this->knot), "clicked", G_CALLBACK (gr_knot_clicked_handler), this);
1313 g_signal_connect (G_OBJECT (this->knot), "doubleclicked", G_CALLBACK (gr_knot_doubleclicked_handler), this);
1314 g_signal_connect (G_OBJECT (this->knot), "grabbed", G_CALLBACK (gr_knot_grabbed_handler), this);
1315 g_signal_connect (G_OBJECT (this->knot), "ungrabbed", G_CALLBACK (gr_knot_ungrabbed_handler), this);
1317 // add the initial draggable
1318 if (draggable)
1319 this->addDraggable (draggable);
1320 updateKnotShape();
1321 }
1323 GrDragger::~GrDragger ()
1324 {
1325 // unselect if it was selected
1326 this->parent->setDeselected(this);
1328 // disconnect signals
1329 g_signal_handlers_disconnect_by_func(G_OBJECT(this->knot), (gpointer) G_CALLBACK (gr_knot_moved_handler), this);
1330 g_signal_handlers_disconnect_by_func(G_OBJECT(this->knot), (gpointer) G_CALLBACK (gr_knot_clicked_handler), this);
1331 g_signal_handlers_disconnect_by_func(G_OBJECT(this->knot), (gpointer) G_CALLBACK (gr_knot_doubleclicked_handler), this);
1332 g_signal_handlers_disconnect_by_func(G_OBJECT(this->knot), (gpointer) G_CALLBACK (gr_knot_grabbed_handler), this);
1333 g_signal_handlers_disconnect_by_func(G_OBJECT(this->knot), (gpointer) G_CALLBACK (gr_knot_ungrabbed_handler), this);
1335 /* unref should call destroy */
1336 g_object_unref (G_OBJECT (this->knot));
1338 // delete all draggables
1339 for (GSList const* i = this->draggables; i != NULL; i = i->next) {
1340 delete ((GrDraggable *) i->data);
1341 }
1342 g_slist_free (this->draggables);
1343 this->draggables = NULL;
1344 }
1346 /**
1347 Select the dragger which has the given draggable.
1348 */
1349 GrDragger *
1350 GrDrag::getDraggerFor (SPItem *item, gint point_type, gint point_i, bool fill_or_stroke)
1351 {
1352 for (GList const* i = this->draggers; i != NULL; i = i->next) {
1353 GrDragger *dragger = (GrDragger *) i->data;
1354 for (GSList const* j = dragger->draggables; j != NULL; j = j->next) {
1355 GrDraggable *da2 = (GrDraggable *) j->data;
1356 if ( (da2->item == item) &&
1357 (point_type == -1 || da2->point_type == point_type) && // -1 means this does not matter
1358 (point_i == -1 || da2->point_i == point_i) && // -1 means this does not matter
1359 (da2->fill_or_stroke == fill_or_stroke)) {
1360 return (dragger);
1361 }
1362 }
1363 }
1364 return NULL;
1365 }
1368 void
1369 GrDragger::moveOtherToDraggable (SPItem *item, gint point_type, gint point_i, bool fill_or_stroke, bool write_repr)
1370 {
1371 GrDragger *d = this->parent->getDraggerFor (item, point_type, point_i, fill_or_stroke);
1372 if (d && d != this) {
1373 d->moveThisToDraggable (item, point_type, point_i, fill_or_stroke, write_repr);
1374 }
1375 }
1378 /**
1379 Draw this dragger as selected
1380 */
1381 void
1382 GrDragger::select()
1383 {
1384 this->knot->fill [SP_KNOT_STATE_NORMAL] = GR_KNOT_COLOR_SELECTED;
1385 g_object_set (G_OBJECT (this->knot->item), "fill_color", GR_KNOT_COLOR_SELECTED, NULL);
1386 }
1388 /**
1389 Draw this dragger as normal (deselected)
1390 */
1391 void
1392 GrDragger::deselect()
1393 {
1394 this->knot->fill [SP_KNOT_STATE_NORMAL] = GR_KNOT_COLOR_NORMAL;
1395 g_object_set (G_OBJECT (this->knot->item), "fill_color", GR_KNOT_COLOR_NORMAL, NULL);
1396 }
1398 bool
1399 GrDragger::isSelected()
1400 {
1401 return g_list_find (parent->selected, this);
1402 }
1404 /**
1405 \brief Deselect all stops/draggers (private)
1406 */
1407 void
1408 GrDrag::deselect_all()
1409 {
1410 while (selected) {
1411 ( (GrDragger*) selected->data)->deselect();
1412 selected = g_list_remove(selected, selected->data);
1413 }
1414 }
1416 /**
1417 \brief Deselect all stops/draggers (public; emits signal)
1418 */
1419 void
1420 GrDrag::deselectAll()
1421 {
1422 deselect_all();
1423 this->desktop->emitToolSubselectionChanged(NULL);
1424 }
1426 /**
1427 \brief Select all stops/draggers
1428 */
1429 void
1430 GrDrag::selectAll()
1431 {
1432 for (GList *l = this->draggers; l != NULL; l = l->next) {
1433 GrDragger *d = ((GrDragger *) l->data);
1434 setSelected (d, true, true);
1435 }
1436 }
1438 /**
1439 \brief Select all stops/draggers that match the coords
1440 */
1441 void
1442 GrDrag::selectByCoords(std::vector<NR::Point> coords)
1443 {
1444 for (GList *l = this->draggers; l != NULL; l = l->next) {
1445 GrDragger *d = ((GrDragger *) l->data);
1446 for (guint k = 0; k < coords.size(); k++) {
1447 if (NR::L2 (d->point - coords[k]) < 1e-4) {
1448 setSelected (d, true, true);
1449 }
1450 }
1451 }
1452 }
1455 /**
1456 \brief Select all stops/draggers that fall within the rect
1457 */
1458 void
1459 GrDrag::selectRect(NR::Rect const &r)
1460 {
1461 for (GList *l = this->draggers; l != NULL; l = l->next) {
1462 GrDragger *d = ((GrDragger *) l->data);
1463 if (r.contains(d->point)) {
1464 setSelected (d, true, true);
1465 }
1466 }
1467 }
1469 /**
1470 \brief Select a dragger
1471 \param dragger The dragger to select
1472 \param add_to_selection If true, add to selection, otherwise deselect others
1473 \param override If true, always select this node, otherwise toggle selected status
1474 */
1475 void
1476 GrDrag::setSelected (GrDragger *dragger, bool add_to_selection, bool override)
1477 {
1478 GrDragger *seldragger = NULL;
1480 if (add_to_selection) {
1481 if (!dragger) return;
1482 if (override) {
1483 if (!g_list_find(selected, dragger)) {
1484 selected = g_list_prepend(selected, dragger);
1485 }
1486 dragger->select();
1487 seldragger = dragger;
1488 } else { // toggle
1489 if (g_list_find(selected, dragger)) {
1490 selected = g_list_remove(selected, dragger);
1491 dragger->deselect();
1492 if (selected) {
1493 seldragger = (GrDragger*) selected->data; // select the dragger that is first in the list
1494 }
1495 } else {
1496 selected = g_list_prepend(selected, dragger);
1497 dragger->select();
1498 seldragger = dragger;
1499 }
1500 }
1501 } else {
1502 deselect_all();
1503 if (dragger) {
1504 selected = g_list_prepend(selected, dragger);
1505 dragger->select();
1506 seldragger = dragger;
1507 }
1508 }
1509 if (seldragger) {
1510 this->desktop->emitToolSubselectionChanged((gpointer) seldragger);
1511 }
1512 }
1514 /**
1515 \brief Deselect a dragger
1516 \param dragger The dragger to deselect
1517 */
1518 void
1519 GrDrag::setDeselected (GrDragger *dragger)
1520 {
1521 if (g_list_find(selected, dragger)) {
1522 selected = g_list_remove(selected, dragger);
1523 dragger->deselect();
1524 }
1525 this->desktop->emitToolSubselectionChanged((gpointer) (selected ? selected->data : NULL ));
1526 }
1530 /**
1531 Create a line from p1 to p2 and add it to the lines list
1532 */
1533 void
1534 GrDrag::addLine (SPItem *item, NR::Point p1, NR::Point p2, guint32 rgba)
1535 {
1536 SPCanvasItem *line = sp_canvas_item_new(sp_desktop_controls(this->desktop),
1537 SP_TYPE_CTRLLINE, NULL);
1538 SP_CTRLLINE(line)->item = item;
1539 sp_ctrlline_set_coords(SP_CTRLLINE(line), p1, p2);
1540 if (rgba != GR_LINE_COLOR_FILL) // fill is the default, so don't set color for it to speed up redraw
1541 sp_ctrlline_set_rgba32 (SP_CTRLLINE(line), rgba);
1542 sp_canvas_item_show (line);
1543 this->lines = g_slist_append (this->lines, line);
1544 }
1546 /**
1547 If there already exists a dragger within MERGE_DIST of p, add the draggable to it; otherwise create
1548 new dragger and add it to draggers list
1549 */
1550 void
1551 GrDrag::addDragger (GrDraggable *draggable)
1552 {
1553 NR::Point p = sp_item_gradient_get_coords (draggable->item, draggable->point_type, draggable->point_i, draggable->fill_or_stroke);
1555 for (GList *i = this->draggers; i != NULL; i = i->next) {
1556 GrDragger *dragger = (GrDragger *) i->data;
1557 if (dragger->mayMerge (draggable) && NR::L2 (dragger->point - p) < MERGE_DIST) {
1558 // distance is small, merge this draggable into dragger, no need to create new dragger
1559 dragger->addDraggable (draggable);
1560 dragger->updateKnotShape();
1561 return;
1562 }
1563 }
1565 GrDragger *new_dragger = new GrDragger(this, p, draggable);
1566 // fixme: draggers should be added AFTER the last one: this way tabbing through them will be from begin to end.
1567 this->draggers = g_list_append (this->draggers, new_dragger);
1568 }
1570 /**
1571 Add draggers for the radial gradient rg on item
1572 */
1573 void
1574 GrDrag::addDraggersRadial (SPRadialGradient *rg, SPItem *item, bool fill_or_stroke)
1575 {
1576 addDragger (new GrDraggable (item, POINT_RG_CENTER, 0, fill_or_stroke));
1577 guint num = rg->vector.stops.size();
1578 if (num > 2) {
1579 for ( guint i = 1; i < num - 1; i++ ) {
1580 addDragger (new GrDraggable (item, POINT_RG_MID1, i, fill_or_stroke));
1581 }
1582 }
1583 addDragger (new GrDraggable (item, POINT_RG_R1, num-1, fill_or_stroke));
1584 if (num > 2) {
1585 for ( guint i = 1; i < num - 1; i++ ) {
1586 addDragger (new GrDraggable (item, POINT_RG_MID2, i, fill_or_stroke));
1587 }
1588 }
1589 addDragger (new GrDraggable (item, POINT_RG_R2, num-1, fill_or_stroke));
1590 addDragger (new GrDraggable (item, POINT_RG_FOCUS, 0, fill_or_stroke));
1591 }
1593 /**
1594 Add draggers for the linear gradient lg on item
1595 */
1596 void
1597 GrDrag::addDraggersLinear (SPLinearGradient *lg, SPItem *item, bool fill_or_stroke)
1598 {
1599 addDragger (new GrDraggable (item, POINT_LG_BEGIN, 0, fill_or_stroke));
1600 guint num = lg->vector.stops.size();
1601 if (num > 2) {
1602 for ( guint i = 1; i < num - 1; i++ ) {
1603 addDragger (new GrDraggable (item, POINT_LG_MID, i, fill_or_stroke));
1604 }
1605 }
1606 addDragger (new GrDraggable (item, POINT_LG_END, num-1, fill_or_stroke));
1607 }
1609 /**
1610 Artificially grab the knot of this dragger; used by the gradient context
1611 */
1612 void
1613 GrDrag::grabKnot (GrDragger *dragger, gint x, gint y, guint32 etime)
1614 {
1615 if (dragger) {
1616 sp_knot_start_dragging (dragger->knot, dragger->point, x, y, etime);
1617 }
1618 }
1620 /**
1621 Artificially grab the knot of the dragger with this draggable; used by the gradient context
1622 */
1623 void
1624 GrDrag::grabKnot (SPItem *item, gint point_type, gint point_i, bool fill_or_stroke, gint x, gint y, guint32 etime)
1625 {
1626 GrDragger *dragger = getDraggerFor (item, point_type, point_i, fill_or_stroke);
1627 if (dragger) {
1628 sp_knot_start_dragging (dragger->knot, dragger->point, x, y, etime);
1629 }
1630 }
1632 /**
1633 Regenerates the draggers list from the current selection; is called when selection is changed or
1634 modified, also when a radial dragger needs to update positions of other draggers in the gradient
1635 */
1636 void
1637 GrDrag::updateDraggers ()
1638 {
1639 while (selected) {
1640 selected = g_list_remove(selected, selected->data);
1641 }
1642 // delete old draggers
1643 for (GList const* i = this->draggers; i != NULL; i = i->next) {
1644 delete ((GrDragger *) i->data);
1645 }
1646 g_list_free (this->draggers);
1647 this->draggers = NULL;
1649 g_return_if_fail (this->selection != NULL);
1651 for (GSList const* i = this->selection->itemList(); i != NULL; i = i->next) {
1653 SPItem *item = SP_ITEM(i->data);
1654 SPStyle *style = SP_OBJECT_STYLE (item);
1656 if (style && (style->fill.isPaintserver())) {
1657 SPObject *server = SP_OBJECT_STYLE_FILL_SERVER (item);
1658 if (SP_IS_LINEARGRADIENT (server)) {
1659 addDraggersLinear (SP_LINEARGRADIENT (server), item, true);
1660 } else if (SP_IS_RADIALGRADIENT (server)) {
1661 addDraggersRadial (SP_RADIALGRADIENT (server), item, true);
1662 }
1663 }
1665 if (style && (style->stroke.isPaintserver())) {
1666 SPObject *server = SP_OBJECT_STYLE_STROKE_SERVER (item);
1667 if (SP_IS_LINEARGRADIENT (server)) {
1668 addDraggersLinear (SP_LINEARGRADIENT (server), item, false);
1669 } else if (SP_IS_RADIALGRADIENT (server)) {
1670 addDraggersRadial (SP_RADIALGRADIENT (server), item, false);
1671 }
1672 }
1673 }
1674 }
1676 /**
1677 Regenerates the lines list from the current selection; is called on each move of a dragger, so that
1678 lines are always in sync with the actual gradient
1679 */
1680 void
1681 GrDrag::updateLines ()
1682 {
1683 // delete old lines
1684 for (GSList const *i = this->lines; i != NULL; i = i->next) {
1685 gtk_object_destroy( GTK_OBJECT (i->data));
1686 }
1687 g_slist_free (this->lines);
1688 this->lines = NULL;
1690 g_return_if_fail (this->selection != NULL);
1692 for (GSList const* i = this->selection->itemList(); i != NULL; i = i->next) {
1694 SPItem *item = SP_ITEM(i->data);
1696 SPStyle *style = SP_OBJECT_STYLE (item);
1698 if (style && (style->fill.isPaintserver())) {
1699 SPObject *server = SP_OBJECT_STYLE_FILL_SERVER (item);
1700 if (SP_IS_LINEARGRADIENT (server)) {
1701 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);
1702 } else if (SP_IS_RADIALGRADIENT (server)) {
1703 NR::Point center = sp_item_gradient_get_coords (item, POINT_RG_CENTER, 0, true);
1704 this->addLine (item, center, sp_item_gradient_get_coords (item, POINT_RG_R1, 0, true), GR_LINE_COLOR_FILL);
1705 this->addLine (item, center, sp_item_gradient_get_coords (item, POINT_RG_R2, 0, true), GR_LINE_COLOR_FILL);
1706 }
1707 }
1709 if (style && (style->stroke.isPaintserver())) {
1710 SPObject *server = SP_OBJECT_STYLE_STROKE_SERVER (item);
1711 if (SP_IS_LINEARGRADIENT (server)) {
1712 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);
1713 } else if (SP_IS_RADIALGRADIENT (server)) {
1714 NR::Point center = sp_item_gradient_get_coords (item, POINT_RG_CENTER, 0, false);
1715 this->addLine (item, center, sp_item_gradient_get_coords (item, POINT_RG_R1, 0, false), GR_LINE_COLOR_STROKE);
1716 this->addLine (item, center, sp_item_gradient_get_coords (item, POINT_RG_R2, 0, false), GR_LINE_COLOR_STROKE);
1717 }
1718 }
1719 }
1720 }
1722 /**
1723 Regenerates the levels list from the current selection
1724 */
1725 void
1726 GrDrag::updateLevels ()
1727 {
1728 hor_levels.clear();
1729 vert_levels.clear();
1731 g_return_if_fail (this->selection != NULL);
1733 for (GSList const* i = this->selection->itemList(); i != NULL; i = i->next) {
1734 SPItem *item = SP_ITEM(i->data);
1735 NR::Maybe<NR::Rect> rect = sp_item_bbox_desktop (item);
1736 if (rect) {
1737 // Remember the edges of the bbox and the center axis
1738 hor_levels.push_back(rect->min()[NR::Y]);
1739 hor_levels.push_back(rect->max()[NR::Y]);
1740 hor_levels.push_back(0.5 * (rect->min()[NR::Y] + rect->max()[NR::Y]));
1741 vert_levels.push_back(rect->min()[NR::X]);
1742 vert_levels.push_back(rect->max()[NR::X]);
1743 vert_levels.push_back(0.5 * (rect->min()[NR::X] + rect->max()[NR::X]));
1744 }
1745 }
1746 }
1748 void
1749 GrDrag::selected_reverse_vector ()
1750 {
1751 if (selected == NULL)
1752 return;
1754 for (GSList const* i = ( (GrDragger*) selected->data )->draggables; i != NULL; i = i->next) {
1755 GrDraggable *draggable = (GrDraggable *) i->data;
1757 sp_item_gradient_reverse_vector (draggable->item, draggable->fill_or_stroke);
1758 }
1759 }
1761 void
1762 GrDrag::selected_move_nowrite (double x, double y, bool scale_radial)
1763 {
1764 selected_move (x, y, false, scale_radial);
1765 }
1767 void
1768 GrDrag::selected_move (double x, double y, bool write_repr, bool scale_radial)
1769 {
1770 if (selected == NULL)
1771 return;
1773 bool did = false;
1775 for (GList *i = selected; i != NULL; i = i->next) {
1776 GrDragger *d = (GrDragger *) i->data;
1778 if (!d->isA(POINT_LG_MID) && !d->isA(POINT_RG_MID1) && !d->isA(POINT_RG_MID2)) {
1779 // if this is an endpoint,
1781 // Moving an rg center moves its focus and radii as well.
1782 // therefore, if this is a focus or radius and if selection
1783 // contains the center as well, do not move this one
1784 if (d->isA(POINT_RG_R1) || d->isA(POINT_RG_R2) ||
1785 (d->isA(POINT_RG_FOCUS) && !d->isA(POINT_RG_CENTER))) {
1786 bool skip_radius_with_center = false;
1787 for (GList *di = selected; di != NULL; di = di->next) {
1788 GrDragger *d_new = (GrDragger *) di->data;
1789 if (d_new->isA (((GrDraggable *) d->draggables->data)->item,
1790 POINT_RG_CENTER,
1791 0,
1792 ((GrDraggable *) d->draggables->data)->fill_or_stroke)) {
1793 // FIXME: here we take into account only the first draggable!
1794 skip_radius_with_center = true;
1795 }
1796 }
1797 if (skip_radius_with_center)
1798 continue;
1799 }
1801 did = true;
1802 d->point += NR::Point (x, y);
1803 d->point_original = d->point;
1804 sp_knot_moveto (d->knot, &(d->point));
1806 d->fireDraggables (write_repr, scale_radial);
1808 d->updateDependencies(write_repr);
1809 }
1810 }
1812 if (write_repr && did) {
1813 // we did an undoable action
1814 sp_document_maybe_done (sp_desktop_document (desktop), "grmoveh", SP_VERB_CONTEXT_GRADIENT,
1815 _("Move gradient handle(s)"));
1816 return;
1817 }
1819 if (!did) { // none of the end draggers are selected, so let's try to move the mids
1821 GrDragger *dragger = (GrDragger *) selected->data;
1822 // a midpoint dragger can (logically) only contain one GrDraggable
1823 GrDraggable *draggable = (GrDraggable *) dragger->draggables->data;
1825 NR::Point begin(0,0), end(0,0);
1826 NR::Point low_lim(0,0), high_lim(0,0);
1828 SPObject *server = draggable->getServer();
1829 GSList *moving = NULL;
1830 gr_midpoint_limits(dragger, server, &begin, &end, &low_lim, &high_lim, &moving);
1832 NR::Point p(x, y);
1833 p = snap_vector_midpoint (dragger->point + p, low_lim, high_lim, 0);
1834 NR::Point displacement = p - dragger->point;
1836 for (GSList const* i = moving; i != NULL; i = i->next) {
1837 GrDragger *drg = (GrDragger*) i->data;
1838 SPKnot *drgknot = drg->knot;
1839 drg->point += displacement;
1840 sp_knot_moveto (drgknot, & drg->point);
1841 drg->fireDraggables (true);
1842 drg->updateDependencies(true);
1843 did = true;
1844 }
1846 g_slist_free(moving);
1848 if (write_repr && did) {
1849 // we did an undoable action
1850 sp_document_maybe_done (sp_desktop_document (desktop), "grmovem", SP_VERB_CONTEXT_GRADIENT,
1851 _("Move gradient mid stop(s)"));
1852 }
1853 }
1854 }
1856 void
1857 GrDrag::selected_move_screen (double x, double y)
1858 {
1859 gdouble zoom = desktop->current_zoom();
1860 gdouble zx = x / zoom;
1861 gdouble zy = y / zoom;
1863 selected_move (zx, zy);
1864 }
1866 /**
1867 Select the knot next to the last selected one and deselect all other selected.
1868 */
1869 GrDragger *
1870 GrDrag::select_next ()
1871 {
1872 GrDragger *d = NULL;
1873 if (selected == NULL || g_list_find(draggers, selected->data)->next == NULL) {
1874 if (draggers)
1875 d = (GrDragger *) draggers->data;
1876 } else {
1877 d = (GrDragger *) g_list_find(draggers, selected->data)->next->data;
1878 }
1879 if (d)
1880 setSelected (d);
1881 return d;
1882 }
1884 /**
1885 Select the knot previous from the last selected one and deselect all other selected.
1886 */
1887 GrDragger *
1888 GrDrag::select_prev ()
1889 {
1890 GrDragger *d = NULL;
1891 if (selected == NULL || g_list_find(draggers, selected->data)->prev == NULL) {
1892 if (draggers)
1893 d = (GrDragger *) g_list_last (draggers)->data;
1894 } else {
1895 d = (GrDragger *) g_list_find(draggers, selected->data)->prev->data;
1896 }
1897 if (d)
1898 setSelected (d);
1899 return d;
1900 }
1903 // FIXME: i.m.o. an ugly function that I just made to work, but... aargh! (Johan)
1904 void
1905 GrDrag::deleteSelected (bool just_one)
1906 {
1907 if (!selected) return;
1909 SPDocument *document = false;
1911 struct StructStopInfo {
1912 SPStop * spstop;
1913 GrDraggable * draggable;
1914 SPGradient * gradient;
1915 SPGradient * vector;
1916 };
1918 GSList *midstoplist = NULL; // list of stops that must be deleted (will be deleted first)
1919 GSList *endstoplist = NULL; // list of stops that must be deleted
1920 while (selected) {
1921 GrDragger *dragger = (GrDragger*) selected->data;
1922 for (GSList * drgble = dragger->draggables; drgble != NULL; drgble = drgble->next) {
1923 GrDraggable *draggable = (GrDraggable*) drgble->data;
1924 SPGradient *gradient = sp_item_gradient (draggable->item, draggable->fill_or_stroke);
1925 SPGradient *vector = sp_gradient_get_forked_vector_if_necessary (gradient, false);
1927 switch (draggable->point_type) {
1928 case POINT_LG_MID:
1929 case POINT_RG_MID1:
1930 case POINT_RG_MID2:
1931 {
1932 SPStop *stop = sp_get_stop_i(vector, draggable->point_i);
1933 // check if already present in list. (e.g. when both RG_MID1 and RG_MID2 were selected)
1934 bool present = false;
1935 for (GSList const * l = midstoplist; l != NULL; l = l->next) {
1936 if ( (SPStop*)l->data == stop ) {
1937 present = true;
1938 break; // no need to search further.
1939 }
1940 }
1941 if (!present)
1942 midstoplist = g_slist_append(midstoplist, stop);
1943 }
1944 break;
1945 case POINT_LG_BEGIN:
1946 case POINT_LG_END:
1947 case POINT_RG_CENTER:
1948 case POINT_RG_R1:
1949 case POINT_RG_R2:
1950 {
1951 SPStop *stop = NULL;
1952 if ( (draggable->point_type == POINT_LG_BEGIN) || (draggable->point_type == POINT_RG_CENTER) ) {
1953 stop = sp_first_stop(vector);
1954 } else {
1955 stop = sp_last_stop(vector);
1956 }
1957 if (stop) {
1958 StructStopInfo *stopinfo = new StructStopInfo;
1959 stopinfo->spstop = stop;
1960 stopinfo->draggable = draggable;
1961 stopinfo->gradient = gradient;
1962 stopinfo->vector = vector;
1963 // check if already present in list. (e.g. when both R1 and R2 were selected)
1964 bool present = false;
1965 for (GSList const * l = endstoplist; l != NULL; l = l->next) {
1966 if ( ((StructStopInfo*)l->data)->spstop == stopinfo->spstop ) {
1967 present = true;
1968 break; // no need to search further.
1969 }
1970 }
1971 if (!present)
1972 endstoplist = g_slist_append(endstoplist, stopinfo);
1973 }
1974 }
1975 break;
1976 default:
1977 break;
1978 }
1979 }
1980 selected = g_list_remove(selected, dragger);
1981 if ( just_one ) break; // iterate once if just_one is set.
1982 }
1983 while (midstoplist) {
1984 SPStop *stop = (SPStop*) midstoplist->data;
1985 document = SP_OBJECT_DOCUMENT (stop);
1986 Inkscape::XML::Node * parent = SP_OBJECT_REPR(stop)->parent();
1987 parent->removeChild(SP_OBJECT_REPR(stop));
1988 midstoplist = g_slist_remove(midstoplist, stop);
1989 }
1990 while (endstoplist) {
1991 StructStopInfo *stopinfo = (StructStopInfo*) endstoplist->data;
1992 document = SP_OBJECT_DOCUMENT (stopinfo->spstop);
1994 // 2 is the minimum, cannot delete more than that without deleting the whole vector
1995 // cannot use vector->vector.stops.size() because the vector might be invalidated by deletion of a midstop
1996 // manually count the children, don't know if there already exists a function for this...
1997 int len = 0;
1998 for ( SPObject *child = sp_object_first_child(stopinfo->vector) ;
1999 child != NULL ;
2000 child = SP_OBJECT_NEXT(child) )
2001 {
2002 if ( SP_IS_STOP(child) ) len ++;
2003 }
2004 if (len > 2)
2005 {
2006 switch (stopinfo->draggable->point_type) {
2007 case POINT_LG_BEGIN:
2008 {
2009 SP_OBJECT_REPR(stopinfo->vector)->removeChild(SP_OBJECT_REPR(stopinfo->spstop));
2011 SPLinearGradient *lg = SP_LINEARGRADIENT(stopinfo->gradient);
2012 NR::Point oldbegin = NR::Point (lg->x1.computed, lg->y1.computed);
2013 NR::Point end = NR::Point (lg->x2.computed, lg->y2.computed);
2014 SPStop *stop = sp_first_stop(stopinfo->vector);
2015 gdouble offset = stop->offset;
2016 NR::Point newbegin = oldbegin + offset * (end - oldbegin);
2017 lg->x1.computed = newbegin[NR::X];
2018 lg->y1.computed = newbegin[NR::Y];
2020 Inkscape::XML::Node *repr = SP_OBJECT_REPR(stopinfo->gradient);
2021 sp_repr_set_svg_double(repr, "x1", lg->x1.computed);
2022 sp_repr_set_svg_double(repr, "y1", lg->y1.computed);
2023 stop->offset = 0;
2024 sp_repr_set_css_double (SP_OBJECT_REPR (stop), "offset", 0);
2026 // iterate through midstops to set new offset values such that they won't move on canvas.
2027 SPStop *laststop = sp_last_stop(stopinfo->vector);
2028 stop = sp_next_stop(stop);
2029 while ( stop != laststop ) {
2030 stop->offset = (stop->offset - offset)/(1 - offset);
2031 sp_repr_set_css_double (SP_OBJECT_REPR (stop), "offset", stop->offset);
2032 stop = sp_next_stop(stop);
2033 }
2034 }
2035 break;
2036 case POINT_LG_END:
2037 {
2038 SP_OBJECT_REPR(stopinfo->vector)->removeChild(SP_OBJECT_REPR(stopinfo->spstop));
2040 SPLinearGradient *lg = SP_LINEARGRADIENT(stopinfo->gradient);
2041 NR::Point begin = NR::Point (lg->x1.computed, lg->y1.computed);
2042 NR::Point oldend = NR::Point (lg->x2.computed, lg->y2.computed);
2043 SPStop *laststop = sp_last_stop(stopinfo->vector);
2044 gdouble offset = laststop->offset;
2045 NR::Point newend = begin + offset * (oldend - begin);
2046 lg->x2.computed = newend[NR::X];
2047 lg->y2.computed = newend[NR::Y];
2049 Inkscape::XML::Node *repr = SP_OBJECT_REPR(stopinfo->gradient);
2050 sp_repr_set_svg_double(repr, "x2", lg->x2.computed);
2051 sp_repr_set_svg_double(repr, "y2", lg->y2.computed);
2052 laststop->offset = 1;
2053 sp_repr_set_css_double (SP_OBJECT_REPR (laststop), "offset", 1);
2055 // iterate through midstops to set new offset values such that they won't move on canvas.
2056 SPStop *stop = sp_first_stop(stopinfo->vector);
2057 stop = sp_next_stop(stop);
2058 while ( stop != laststop ) {
2059 stop->offset = stop->offset / offset;
2060 sp_repr_set_css_double (SP_OBJECT_REPR (stop), "offset", stop->offset);
2061 stop = sp_next_stop(stop);
2062 }
2063 }
2064 break;
2065 case POINT_RG_CENTER:
2066 {
2067 SPStop *newfirst = sp_next_stop (stopinfo->spstop);
2068 if (newfirst) {
2069 newfirst->offset = 0;
2070 sp_repr_set_css_double (SP_OBJECT_REPR (newfirst), "offset", 0);
2071 }
2072 SP_OBJECT_REPR(stopinfo->vector)->removeChild(SP_OBJECT_REPR(stopinfo->spstop));
2073 }
2074 break;
2075 case POINT_RG_R1:
2076 case POINT_RG_R2:
2077 SP_OBJECT_REPR(stopinfo->vector)->removeChild(SP_OBJECT_REPR(stopinfo->spstop));
2079 SPRadialGradient *rg = SP_RADIALGRADIENT(stopinfo->gradient);
2080 double oldradius = rg->r.computed;
2081 SPStop *laststop = sp_last_stop(stopinfo->vector);
2082 gdouble offset = laststop->offset;
2083 double newradius = offset * oldradius;
2084 rg->r.computed = newradius;
2086 Inkscape::XML::Node *repr = SP_OBJECT_REPR(rg);
2087 sp_repr_set_svg_double(repr, "r", rg->r.computed);
2088 laststop->offset = 1;
2089 sp_repr_set_css_double (SP_OBJECT_REPR (laststop), "offset", 1);
2091 // iterate through midstops to set new offset values such that they won't move on canvas.
2092 SPStop *stop = sp_first_stop(stopinfo->vector);
2093 stop = sp_next_stop(stop);
2094 while ( stop != laststop ) {
2095 stop->offset = stop->offset / offset;
2096 sp_repr_set_css_double (SP_OBJECT_REPR (stop), "offset", stop->offset);
2097 stop = sp_next_stop(stop);
2098 }
2099 break;
2100 }
2101 }
2102 else
2103 { // delete the gradient from the object. set fill to unset FIXME: set to fill of unselected node?
2104 SPCSSAttr *css = sp_repr_css_attr_new ();
2106 // stopinfo->spstop is the selected stop
2107 Inkscape::XML::Node *unselectedrepr = SP_OBJECT_REPR(stopinfo->vector)->firstChild();
2108 if (unselectedrepr == SP_OBJECT_REPR(stopinfo->spstop) ) {
2109 unselectedrepr = unselectedrepr->next();
2110 }
2112 if (unselectedrepr == NULL) {
2113 if (stopinfo->draggable->fill_or_stroke) {
2114 sp_repr_css_unset_property (css, "fill");
2115 } else {
2116 sp_repr_css_unset_property (css, "stroke");
2117 }
2118 } else {
2119 SPCSSAttr *stopcss = sp_repr_css_attr(unselectedrepr, "style");
2120 if (stopinfo->draggable->fill_or_stroke) {
2121 sp_repr_css_set_property(css, "fill", sp_repr_css_property(stopcss, "stop-color", "inkscape:unset"));
2122 sp_repr_css_set_property(css, "fill-opacity", sp_repr_css_property(stopcss, "stop-opacity", "1"));
2123 } else {
2124 sp_repr_css_set_property(css, "stroke", sp_repr_css_property(stopcss, "stop-color", "inkscape:unset"));
2125 sp_repr_css_set_property(css, "stroke-opacity", sp_repr_css_property(stopcss, "stop-opacity", "1"));
2126 }
2127 sp_repr_css_attr_unref (stopcss);
2128 }
2130 sp_repr_css_change (SP_OBJECT_REPR (stopinfo->draggable->item), css, "style");
2131 sp_repr_css_attr_unref (css);
2132 }
2134 endstoplist = g_slist_remove(endstoplist, stopinfo);
2135 delete stopinfo;
2136 }
2138 if (document) {
2139 sp_document_done ( document, SP_VERB_CONTEXT_GRADIENT, _("Delete gradient stop(s)") );
2140 }
2141 }
2144 /*
2145 Local Variables:
2146 mode:c++
2147 c-file-style:"stroustrup"
2148 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
2149 indent-tabs-mode:nil
2150 fill-column:99
2151 End:
2152 */
2153 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4 :