1 /*
2 * On-canvas gradient dragging
3 *
4 * Authors:
5 * bulia byak <buliabyak@users.sf.net>
6 * Johan Engelen <j.b.c.engelen@ewi.utwente.nl>
7 * Jon A. Cruz <jon@joncruz.org>
8 * Abhishek Sharma
9 *
10 * Copyright (C) 2007 Johan Engelen
11 * Copyright (C) 2005,2010 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 "desktop-handles.h"
29 #include "document.h"
30 #include "display/sp-ctrlline.h"
31 #include "display/sp-canvas-util.h"
32 #include "xml/repr.h"
33 #include "svg/css-ostringstream.h"
34 #include "svg/svg.h"
35 #include "libnr/nr-point-fns.h"
36 #include "preferences.h"
37 #include "sp-item.h"
38 #include "style.h"
39 #include "knot.h"
40 #include "sp-linear-gradient.h"
41 #include "sp-radial-gradient.h"
42 #include "gradient-chemistry.h"
43 #include "gradient-drag.h"
44 #include "sp-stop.h"
45 #include "snap.h"
46 #include "sp-namedview.h"
47 #include "selection-chemistry.h"
49 using Inkscape::DocumentUndo;
51 #define GR_KNOT_COLOR_NORMAL 0xffffff00
52 #define GR_KNOT_COLOR_MOUSEOVER 0xff000000
53 #define GR_KNOT_COLOR_SELECTED 0x0000ff00
55 #define GR_LINE_COLOR_FILL 0x0000ff7f
56 #define GR_LINE_COLOR_STROKE 0x9999007f
58 // screen pixels between knots when they snap:
59 #define SNAP_DIST 5
61 // absolute distance between gradient points for them to become a single dragger when the drag is created:
62 #define MERGE_DIST 0.1
64 // knot shapes corresponding to GrPointType enum
65 SPKnotShapeType gr_knot_shapes [] = {
66 SP_KNOT_SHAPE_SQUARE, //POINT_LG_BEGIN
67 SP_KNOT_SHAPE_CIRCLE, //POINT_LG_END
68 SP_KNOT_SHAPE_DIAMOND, //POINT_LG_MID
69 SP_KNOT_SHAPE_SQUARE, // POINT_RG_CENTER
70 SP_KNOT_SHAPE_CIRCLE, // POINT_RG_R1
71 SP_KNOT_SHAPE_CIRCLE, // POINT_RG_R2
72 SP_KNOT_SHAPE_CROSS, // POINT_RG_FOCUS
73 SP_KNOT_SHAPE_DIAMOND, //POINT_RG_MID1
74 SP_KNOT_SHAPE_DIAMOND //POINT_RG_MID2
75 };
77 const gchar *gr_knot_descr [] = {
78 N_("Linear gradient <b>start</b>"), //POINT_LG_BEGIN
79 N_("Linear gradient <b>end</b>"),
80 N_("Linear gradient <b>mid stop</b>"),
81 N_("Radial gradient <b>center</b>"),
82 N_("Radial gradient <b>radius</b>"),
83 N_("Radial gradient <b>radius</b>"),
84 N_("Radial gradient <b>focus</b>"), // POINT_RG_FOCUS
85 N_("Radial gradient <b>mid stop</b>"),
86 N_("Radial gradient <b>mid stop</b>")
87 };
89 static void
90 gr_drag_sel_changed(Inkscape::Selection */*selection*/, gpointer data)
91 {
92 GrDrag *drag = (GrDrag *) data;
93 drag->updateDraggers ();
94 drag->updateLines ();
95 drag->updateLevels ();
96 }
98 static void
99 gr_drag_sel_modified (Inkscape::Selection */*selection*/, guint /*flags*/, gpointer data)
100 {
101 GrDrag *drag = (GrDrag *) data;
102 if (drag->local_change) {
103 drag->local_change = false;
104 } else {
105 drag->updateDraggers ();
106 }
107 drag->updateLines ();
108 drag->updateLevels ();
109 }
111 /**
112 When a _query_style_signal is received, check that \a property requests fill/stroke/opacity (otherwise
113 skip), and fill the \a style with the averaged color of all draggables of the selected dragger, if
114 any.
115 */
116 int
117 gr_drag_style_query (SPStyle *style, int property, gpointer data)
118 {
119 GrDrag *drag = (GrDrag *) data;
121 if (property != QUERY_STYLE_PROPERTY_FILL && property != QUERY_STYLE_PROPERTY_STROKE && property != QUERY_STYLE_PROPERTY_MASTEROPACITY) {
122 return QUERY_STYLE_NOTHING;
123 }
125 if (!drag->selected) {
126 return QUERY_STYLE_NOTHING;
127 } else {
128 int ret = QUERY_STYLE_NOTHING;
130 float cf[4];
131 cf[0] = cf[1] = cf[2] = cf[3] = 0;
133 int count = 0;
135 for (GList *i = drag->selected; i != NULL; i = i->next) { // for all selected draggers
136 GrDragger *d = (GrDragger *) i->data;
137 for (GSList const* j = d->draggables; j != NULL; j = j->next) { // for all draggables of dragger
138 GrDraggable *draggable = (GrDraggable *) j->data;
140 if (ret == QUERY_STYLE_NOTHING) {
141 ret = QUERY_STYLE_SINGLE;
142 } else if (ret == QUERY_STYLE_SINGLE) {
143 ret = QUERY_STYLE_MULTIPLE_AVERAGED;
144 }
146 guint32 c = sp_item_gradient_stop_query_style (draggable->item, draggable->point_type, draggable->point_i, draggable->fill_or_stroke);
147 cf[0] += SP_RGBA32_R_F (c);
148 cf[1] += SP_RGBA32_G_F (c);
149 cf[2] += SP_RGBA32_B_F (c);
150 cf[3] += SP_RGBA32_A_F (c);
152 count ++;
153 }
154 }
156 if (count) {
157 cf[0] /= count;
158 cf[1] /= count;
159 cf[2] /= count;
160 cf[3] /= count;
162 // set both fill and stroke with our stop-color and stop-opacity
163 style->fill.clear();
164 style->fill.setColor( cf[0], cf[1], cf[2] );
165 style->fill.set = TRUE;
166 style->stroke.clear();
167 style->stroke.setColor( cf[0], cf[1], cf[2] );
168 style->stroke.set = TRUE;
170 style->fill_opacity.value = SP_SCALE24_FROM_FLOAT (1.0);
171 style->fill_opacity.set = TRUE;
172 style->stroke_opacity.value = SP_SCALE24_FROM_FLOAT (1.0);
173 style->stroke_opacity.set = TRUE;
175 style->opacity.value = SP_SCALE24_FROM_FLOAT (cf[3]);
176 style->opacity.set = TRUE;
177 }
179 return ret;
180 }
181 }
183 Glib::ustring GrDrag::makeStopSafeColor( gchar const *str, bool &isNull )
184 {
185 Glib::ustring colorStr;
186 if ( str ) {
187 isNull = false;
188 colorStr = str;
189 Glib::ustring::size_type pos = colorStr.find("url(#");
190 if ( pos != Glib::ustring::npos ) {
191 Glib::ustring targetName = colorStr.substr(pos + 5, colorStr.length() - 6);
192 const GSList *gradients = desktop->doc()->getResourceList("gradient");
193 for (const GSList *item = gradients; item; item = item->next) {
194 SPGradient* grad = SP_GRADIENT(item->data);
195 if ( targetName == grad->getId() ) {
196 SPGradient *vect = grad->getVector();
197 SPStop *firstStop = (vect) ? vect->getFirstStop() : grad->getFirstStop();
198 if (firstStop) {
199 Glib::ustring stopColorStr;
200 if (firstStop->currentColor) {
201 stopColorStr = firstStop->getStyleProperty("color", NULL);
202 } else {
203 stopColorStr = firstStop->specified_color.toString();
204 }
205 if ( !stopColorStr.empty() ) {
206 colorStr = stopColorStr;
207 }
208 }
209 break;
210 }
211 }
212 }
213 } else {
214 isNull = true;
215 }
217 return colorStr;
218 }
220 bool GrDrag::styleSet( const SPCSSAttr *css )
221 {
222 if (!selected) {
223 return false;
224 }
226 SPCSSAttr *stop = sp_repr_css_attr_new();
228 // See if the css contains interesting properties, and if so, translate them into the format
229 // acceptable for gradient stops
231 // any of color properties, in order of increasing priority:
232 if (css->attribute("flood-color")) {
233 sp_repr_css_set_property (stop, "stop-color", css->attribute("flood-color"));
234 }
236 if (css->attribute("lighting-color")) {
237 sp_repr_css_set_property (stop, "stop-color", css->attribute("lighting-color"));
238 }
240 if (css->attribute("color")) {
241 sp_repr_css_set_property (stop, "stop-color", css->attribute("color"));
242 }
244 if (css->attribute("stroke") && strcmp(css->attribute("stroke"), "none")) {
245 sp_repr_css_set_property (stop, "stop-color", css->attribute("stroke"));
246 }
248 if (css->attribute("fill") && strcmp(css->attribute("fill"), "none")) {
249 sp_repr_css_set_property (stop, "stop-color", css->attribute("fill"));
250 }
252 if (css->attribute("stop-color")) {
253 sp_repr_css_set_property (stop, "stop-color", css->attribute("stop-color"));
254 }
256 // Make sure the style is allowed for gradient stops.
257 if ( !sp_repr_css_property_is_unset( stop, "stop-color") ) {
258 bool stopIsNull = false;
259 Glib::ustring tmp = makeStopSafeColor( sp_repr_css_property( stop, "stop-color", "" ), stopIsNull );
260 if ( !stopIsNull && !tmp.empty() ) {
261 sp_repr_css_set_property( stop, "stop-color", tmp.c_str() );
262 }
263 }
266 if (css->attribute("stop-opacity")) { // direct setting of stop-opacity has priority
267 sp_repr_css_set_property(stop, "stop-opacity", css->attribute("stop-opacity"));
268 } else { // multiply all opacity properties:
269 gdouble accumulated = 1.0;
270 accumulated *= sp_svg_read_percentage(css->attribute("flood-opacity"), 1.0);
271 accumulated *= sp_svg_read_percentage(css->attribute("opacity"), 1.0);
272 accumulated *= sp_svg_read_percentage(css->attribute("stroke-opacity"), 1.0);
273 accumulated *= sp_svg_read_percentage(css->attribute("fill-opacity"), 1.0);
275 Inkscape::CSSOStringStream os;
276 os << accumulated;
277 sp_repr_css_set_property(stop, "stop-opacity", os.str().c_str());
279 if ((css->attribute("fill") && !css->attribute("stroke") && !strcmp(css->attribute("fill"), "none")) ||
280 (css->attribute("stroke") && !css->attribute("fill") && !strcmp(css->attribute("stroke"), "none"))) {
281 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
282 }
283 }
285 if (!stop->attributeList()) { // nothing for us here, pass it on
286 sp_repr_css_attr_unref(stop);
287 return false;
288 }
290 for (GList const* sel = selected; sel != NULL; sel = sel->next) { // for all selected draggers
291 GrDragger* dragger = reinterpret_cast<GrDragger*>(sel->data);
292 for (GSList const* i = dragger->draggables; i != NULL; i = i->next) { // for all draggables of dragger
293 GrDraggable *draggable = reinterpret_cast<GrDraggable *>(i->data);
295 local_change = true;
296 sp_item_gradient_stop_set_style(draggable->item, draggable->point_type, draggable->point_i, draggable->fill_or_stroke, stop);
297 }
298 }
300 //sp_repr_css_print(stop);
301 sp_repr_css_attr_unref(stop);
302 return true;
303 }
305 guint32 GrDrag::getColor()
306 {
307 if (!selected) return 0;
309 float cf[4];
310 cf[0] = cf[1] = cf[2] = cf[3] = 0;
312 int count = 0;
314 for (GList *i = selected; i != NULL; i = i->next) { // for all selected draggers
315 GrDragger *d = (GrDragger *) i->data;
316 for (GSList const* j = d->draggables; j != NULL; j = j->next) { // for all draggables of dragger
317 GrDraggable *draggable = (GrDraggable *) j->data;
319 guint32 c = sp_item_gradient_stop_query_style (draggable->item, draggable->point_type, draggable->point_i, draggable->fill_or_stroke);
320 cf[0] += SP_RGBA32_R_F (c);
321 cf[1] += SP_RGBA32_G_F (c);
322 cf[2] += SP_RGBA32_B_F (c);
323 cf[3] += SP_RGBA32_A_F (c);
325 count ++;
326 }
327 }
329 if (count) {
330 cf[0] /= count;
331 cf[1] /= count;
332 cf[2] /= count;
333 cf[3] /= count;
334 }
336 return SP_RGBA32_F_COMPOSE(cf[0], cf[1], cf[2], cf[3]);
337 }
339 SPStop *
340 GrDrag::addStopNearPoint (SPItem *item, Geom::Point mouse_p, double tolerance)
341 {
342 gfloat offset; // type of SPStop.offset = gfloat
343 SPGradient *gradient;
344 bool fill_or_stroke = true;
345 bool r1_knot = false;
347 bool addknot = false;
348 do {
349 gradient = sp_item_gradient (item, fill_or_stroke);
350 if (SP_IS_LINEARGRADIENT(gradient)) {
351 Geom::Point begin = sp_item_gradient_get_coords(item, POINT_LG_BEGIN, 0, fill_or_stroke);
352 Geom::Point end = sp_item_gradient_get_coords(item, POINT_LG_END, 0, fill_or_stroke);
354 Geom::Point nearest = snap_vector_midpoint (mouse_p, begin, end, 0);
355 double dist_screen = Geom::L2 (mouse_p - nearest);
356 if ( dist_screen < tolerance ) {
357 // add the knot
358 offset = get_offset_between_points(nearest, begin, end);
359 addknot = true;
360 break; // break out of the while loop: add only one knot
361 }
362 } else if (SP_IS_RADIALGRADIENT(gradient)) {
363 Geom::Point begin = sp_item_gradient_get_coords(item, POINT_RG_CENTER, 0, fill_or_stroke);
364 Geom::Point end = sp_item_gradient_get_coords(item, POINT_RG_R1, 0, fill_or_stroke);
365 Geom::Point nearest = snap_vector_midpoint (mouse_p, begin, end, 0);
366 double dist_screen = Geom::L2 (mouse_p - nearest);
367 if ( dist_screen < tolerance ) {
368 offset = get_offset_between_points(nearest, begin, end);
369 addknot = true;
370 r1_knot = true;
371 break; // break out of the while loop: add only one knot
372 }
374 end = sp_item_gradient_get_coords(item, POINT_RG_R2, 0, fill_or_stroke);
375 nearest = snap_vector_midpoint (mouse_p, begin, end, 0);
376 dist_screen = Geom::L2 (mouse_p - nearest);
377 if ( dist_screen < tolerance ) {
378 offset = get_offset_between_points(nearest, begin, end);
379 addknot = true;
380 r1_knot = false;
381 break; // break out of the while loop: add only one knot
382 }
383 }
384 fill_or_stroke = !fill_or_stroke;
385 } while (!fill_or_stroke && !addknot) ;
387 if (addknot) {
388 SPGradient *vector = sp_gradient_get_forked_vector_if_necessary (gradient, false);
389 SPStop* prev_stop = vector->getFirstStop();
390 SPStop* next_stop = prev_stop->getNextStop();
391 guint i = 1;
392 while ( (next_stop) && (next_stop->offset < offset) ) {
393 prev_stop = next_stop;
394 next_stop = next_stop->getNextStop();
395 i++;
396 }
397 if (!next_stop) {
398 // logical error: the endstop should have offset 1 and should always be more than this offset here
399 return NULL;
400 }
403 SPStop *newstop = sp_vector_add_stop (vector, prev_stop, next_stop, offset);
404 gradient->ensureVector();
405 updateDraggers();
407 return newstop;
408 }
410 return NULL;
411 }
414 bool
415 GrDrag::dropColor(SPItem */*item*/, gchar const *c, Geom::Point p)
416 {
417 // Note: not sure if a null pointer can come in for the style, but handle that just in case
418 bool stopIsNull = false;
419 Glib::ustring toUse = makeStopSafeColor( c, stopIsNull );
421 // first, see if we can drop onto one of the existing draggers
422 for (GList *i = draggers; i != NULL; i = i->next) { // for all draggables of dragger
423 GrDragger *d = (GrDragger *) i->data;
425 if (Geom::L2(p - d->point)*desktop->current_zoom() < 5) {
426 SPCSSAttr *stop = sp_repr_css_attr_new ();
427 sp_repr_css_set_property( stop, "stop-color", stopIsNull ? 0 : toUse.c_str() );
428 sp_repr_css_set_property( stop, "stop-opacity", "1" );
429 for (GSList *j = d->draggables; j != NULL; j = j->next) { // for all draggables of dragger
430 GrDraggable *draggable = (GrDraggable *) j->data;
431 local_change = true;
432 sp_item_gradient_stop_set_style (draggable->item, draggable->point_type, draggable->point_i, draggable->fill_or_stroke, stop);
433 }
434 sp_repr_css_attr_unref(stop);
435 return true;
436 }
437 }
439 // now see if we're over line and create a new stop
440 bool over_line = false;
441 SPCtrlLine *line = NULL;
442 if (lines) {
443 for (GSList *l = lines; (l != NULL) && (!over_line); l = l->next) {
444 line = (SPCtrlLine*) l->data;
445 Geom::Point nearest = snap_vector_midpoint (p, line->s, line->e, 0);
446 double dist_screen = Geom::L2 (p - nearest) * desktop->current_zoom();
447 if (line->item && dist_screen < 5) {
448 SPStop *stop = addStopNearPoint (line->item, p, 5/desktop->current_zoom());
449 if (stop) {
450 SPCSSAttr *css = sp_repr_css_attr_new ();
451 sp_repr_css_set_property( css, "stop-color", stopIsNull ? 0 : toUse.c_str() );
452 sp_repr_css_set_property( css, "stop-opacity", "1" );
453 sp_repr_css_change (SP_OBJECT_REPR (stop), css, "style");
454 return true;
455 }
456 }
457 }
458 }
460 return false;
461 }
464 GrDrag::GrDrag(SPDesktop *desktop) :
465 selected(0),
466 keep_selection(false),
467 local_change(false),
468 desktop(desktop),
469 hor_levels(),
470 vert_levels(),
471 draggers(0),
472 lines(0),
473 selection(sp_desktop_selection(desktop)),
474 sel_changed_connection(),
475 sel_modified_connection(),
476 style_set_connection(),
477 style_query_connection()
478 {
479 sel_changed_connection = selection->connectChanged(
480 sigc::bind(
481 sigc::ptr_fun(&gr_drag_sel_changed),
482 (gpointer)this )
484 );
485 sel_modified_connection = selection->connectModified(
486 sigc::bind(
487 sigc::ptr_fun(&gr_drag_sel_modified),
488 (gpointer)this )
489 );
491 style_set_connection = desktop->connectSetStyle( sigc::mem_fun(*this, &GrDrag::styleSet) );
493 style_query_connection = desktop->connectQueryStyle(
494 sigc::bind(
495 sigc::ptr_fun(&gr_drag_style_query),
496 (gpointer)this )
497 );
499 updateDraggers();
500 updateLines();
501 updateLevels();
503 if (desktop->gr_item) {
504 setSelected(getDraggerFor(desktop->gr_item, desktop->gr_point_type, desktop->gr_point_i, desktop->gr_fill_or_stroke));
505 }
506 }
508 GrDrag::~GrDrag()
509 {
510 this->sel_changed_connection.disconnect();
511 this->sel_modified_connection.disconnect();
512 this->style_set_connection.disconnect();
513 this->style_query_connection.disconnect();
515 if (this->selected) {
516 GrDraggable *draggable = (GrDraggable *) ((GrDragger*)this->selected->data)->draggables->data;
517 desktop->gr_item = draggable->item;
518 desktop->gr_point_type = draggable->point_type;
519 desktop->gr_point_i = draggable->point_i;
520 desktop->gr_fill_or_stroke = draggable->fill_or_stroke;
521 } else {
522 desktop->gr_item = NULL;
523 desktop->gr_point_type = 0;
524 desktop->gr_point_i = 0;
525 desktop->gr_fill_or_stroke = true;
526 }
528 deselect_all();
529 for (GList *l = this->draggers; l != NULL; l = l->next) {
530 delete ((GrDragger *) l->data);
531 }
532 g_list_free (this->draggers);
533 this->draggers = NULL;
534 this->selected = NULL;
536 for (GSList *l = this->lines; l != NULL; l = l->next) {
537 gtk_object_destroy( GTK_OBJECT (l->data));
538 }
539 g_slist_free (this->lines);
540 this->lines = NULL;
541 }
543 GrDraggable::GrDraggable (SPItem *item, guint point_type, guint point_i, bool fill_or_stroke)
544 {
545 this->item = item;
546 this->point_type = point_type;
547 this->point_i = point_i;
548 this->fill_or_stroke = fill_or_stroke;
550 g_object_ref (G_OBJECT (this->item));
551 }
553 GrDraggable::~GrDraggable ()
554 {
555 g_object_unref (G_OBJECT (this->item));
556 }
559 SPObject *GrDraggable::getServer()
560 {
561 if (!item) {
562 return NULL;
563 }
565 SPObject *server = NULL;
566 if (fill_or_stroke) {
567 server = item->style->getFillPaintServer();
568 }else {
569 server = item->style->getStrokePaintServer();
570 }
572 return server;
573 }
575 static void
576 gr_knot_moved_handler(SPKnot *knot, Geom::Point const &ppointer, guint state, gpointer data)
577 {
578 GrDragger *dragger = (GrDragger *) data;
579 GrDrag *drag = dragger->parent;
581 Geom::Point p = ppointer;
583 SPDesktop *desktop = dragger->parent->desktop;
584 SnapManager &m = desktop->namedview->snap_manager;
585 double snap_dist = m.snapprefs.getObjectTolerance() / dragger->parent->desktop->current_zoom();
587 if (state & GDK_SHIFT_MASK) {
588 // with Shift; unsnap if we carry more than one draggable
589 if (dragger->draggables && dragger->draggables->next) {
590 // create a new dragger
591 GrDragger *dr_new = new GrDragger (dragger->parent, dragger->point, NULL);
592 dragger->parent->draggers = g_list_prepend (dragger->parent->draggers, dr_new);
593 // relink to it all but the first draggable in the list
594 for (GSList const* i = dragger->draggables->next; i != NULL; i = i->next) {
595 GrDraggable *draggable = (GrDraggable *) i->data;
596 dr_new->addDraggable (draggable);
597 }
598 dr_new->updateKnotShape();
599 g_slist_free (dragger->draggables->next);
600 dragger->draggables->next = NULL;
601 dragger->updateKnotShape();
602 dragger->updateTip();
603 }
604 } else if (!(state & GDK_CONTROL_MASK)) {
605 // without Shift or Ctrl; see if we need to snap to another dragger
606 for (GList *di = dragger->parent->draggers; di != NULL; di = di->next) {
607 GrDragger *d_new = (GrDragger *) di->data;
608 if (dragger->mayMerge(d_new) && Geom::L2 (d_new->point - p) < snap_dist) {
610 // Merge draggers:
611 for (GSList const* i = dragger->draggables; i != NULL; i = i->next) { // for all draggables of dragger
612 GrDraggable *draggable = (GrDraggable *) i->data;
613 // copy draggable to d_new:
614 GrDraggable *da_new = new GrDraggable (draggable->item, draggable->point_type, draggable->point_i, draggable->fill_or_stroke);
615 d_new->addDraggable (da_new);
616 }
618 // unlink and delete this dragger
619 dragger->parent->draggers = g_list_remove (dragger->parent->draggers, dragger);
620 delete dragger;
622 // update the new merged dragger
623 d_new->fireDraggables(true, false, true);
624 d_new->parent->updateLines();
625 d_new->parent->setSelected (d_new);
626 d_new->updateKnotShape ();
627 d_new->updateTip ();
628 d_new->updateDependencies(true);
629 DocumentUndo::done(sp_desktop_document (d_new->parent->desktop), SP_VERB_CONTEXT_GRADIENT,
630 _("Merge gradient handles"));
631 return;
632 }
633 }
634 }
636 if (!((state & GDK_SHIFT_MASK) || (state & GDK_CONTROL_MASK))) {
637 m.setup(desktop);
638 Inkscape::SnappedPoint s = m.freeSnap(Inkscape::SnapCandidatePoint(p, Inkscape::SNAPSOURCE_OTHER_HANDLE));
639 m.unSetup();
640 if (s.getSnapped()) {
641 p = s.getPoint();
642 sp_knot_moveto (knot, p);
643 }
644 } else if (state & GDK_CONTROL_MASK) {
645 SnappedConstraints sc;
646 Inkscape::SnapCandidatePoint scp = Inkscape::SnapCandidatePoint(p, Inkscape::SNAPSOURCE_OTHER_HANDLE);
647 Inkscape::Preferences *prefs = Inkscape::Preferences::get();
648 unsigned snaps = abs(prefs->getInt("/options/rotationsnapsperpi/value", 12));
649 /* 0 means no snapping. */
651 for (GSList const* i = dragger->draggables; i != NULL; i = i->next) {
652 GrDraggable *draggable = (GrDraggable *) i->data;
654 Geom::Point dr_snap(Geom::infinity(), Geom::infinity());
656 if (draggable->point_type == POINT_LG_BEGIN || draggable->point_type == POINT_LG_END) {
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 draggable->point_type == POINT_LG_BEGIN? POINT_LG_END : POINT_LG_BEGIN,
663 draggable->fill_or_stroke)) {
664 // found the other end of the linear gradient;
665 if (state & GDK_SHIFT_MASK) {
666 // moving linear around center
667 Geom::Point center = Geom::Point (0.5*(d_new->point + dragger->point));
668 dr_snap = center;
669 } else {
670 // moving linear around the other end
671 dr_snap = d_new->point;
672 }
673 }
674 }
675 } else if (draggable->point_type == POINT_RG_R1 || draggable->point_type == POINT_RG_R2 || draggable->point_type == POINT_RG_FOCUS) {
676 for (GList *di = dragger->parent->draggers; di != NULL; di = di->next) {
677 GrDragger *d_new = (GrDragger *) di->data;
678 if (d_new == dragger)
679 continue;
680 if (d_new->isA (draggable->item,
681 POINT_RG_CENTER,
682 draggable->fill_or_stroke)) {
683 // found the center of the radial gradient;
684 dr_snap = d_new->point;
685 }
686 }
687 } else if (draggable->point_type == POINT_RG_CENTER) {
688 // radial center snaps to hor/vert relative to its original position
689 dr_snap = dragger->point_original;
690 }
692 // dr_snap contains the origin of the gradient, whereas p will be the new endpoint which we will try to snap now
693 Inkscape::SnappedPoint sp;
694 if (dr_snap.isFinite()) {
695 m.setup(desktop);
696 if (state & GDK_MOD1_MASK) {
697 // with Alt, snap to the original angle and its perpendiculars
698 sp = m.constrainedAngularSnap(scp, dragger->point_original, dr_snap, 2);
699 } else {
700 // with Ctrl, snap to M_PI/snaps
701 sp = m.constrainedAngularSnap(scp, boost::optional<Geom::Point>(), dr_snap, snaps);
702 }
703 m.unSetup();
704 sc.points.push_back(sp);
705 }
706 }
708 m.setup(desktop, false); // turn of the snap indicator temporarily
709 Inkscape::SnappedPoint bsp = m.findBestSnap(scp, sc, true);
710 m.unSetup();
711 if (!bsp.getSnapped()) {
712 // If we didn't truly snap to an object or to a grid, then we will still have to look for the
713 // closest projection onto one of the constraints. findBestSnap() will not do this for us
714 for (std::list<Inkscape::SnappedPoint>::const_iterator i = sc.points.begin(); i != sc.points.end(); i++) {
715 if (i == sc.points.begin() || (Geom::L2((*i).getPoint() - p) < Geom::L2(bsp.getPoint() - p))) {
716 bsp.setPoint((*i).getPoint());
717 bsp.setTarget(Inkscape::SNAPTARGET_CONSTRAINED_ANGLE);
718 }
719 }
720 }
721 //p = sc.points.front().getPoint();
722 p = bsp.getPoint();
723 sp_knot_moveto (knot, p);
724 }
726 drag->keep_selection = (bool) g_list_find(drag->selected, dragger);
727 bool scale_radial = (state & GDK_CONTROL_MASK) && (state & GDK_SHIFT_MASK);
729 if (drag->keep_selection) {
730 Geom::Point diff = p - dragger->point;
731 drag->selected_move_nowrite (diff[Geom::X], diff[Geom::Y], scale_radial);
732 } else {
733 dragger->point = p;
734 dragger->fireDraggables (false, scale_radial);
735 dragger->updateDependencies(false);
736 }
738 }
741 static void
742 gr_midpoint_limits(GrDragger *dragger, SPObject *server, Geom::Point *begin, Geom::Point *end, Geom::Point *low_lim, Geom::Point *high_lim, GSList **moving)
743 {
745 GrDrag *drag = dragger->parent;
746 // a midpoint dragger can (logically) only contain one GrDraggable
747 GrDraggable *draggable = (GrDraggable *) dragger->draggables->data;
749 // get begin and end points between which dragging is allowed:
750 // the draglimits are between knot(lowest_i - 1) and knot(highest_i + 1)
751 *moving = g_slist_append(*moving, dragger);
753 guint lowest_i = draggable->point_i;
754 guint highest_i = draggable->point_i;
755 GrDragger *lowest_dragger = dragger;
756 GrDragger *highest_dragger = dragger;
757 if (dragger->isSelected()) {
758 GrDragger* d_add;
759 while ( true )
760 {
761 d_add = drag->getDraggerFor(draggable->item, draggable->point_type, lowest_i - 1, draggable->fill_or_stroke);
762 if ( d_add && g_list_find(drag->selected, d_add) ) {
763 lowest_i = lowest_i - 1;
764 *moving = g_slist_prepend(*moving, d_add);
765 lowest_dragger = d_add;
766 } else {
767 break;
768 }
769 }
771 while ( true )
772 {
773 d_add = drag->getDraggerFor(draggable->item, draggable->point_type, highest_i + 1, draggable->fill_or_stroke);
774 if ( d_add && g_list_find(drag->selected, d_add) ) {
775 highest_i = highest_i + 1;
776 *moving = g_slist_append(*moving, d_add);
777 highest_dragger = d_add;
778 } else {
779 break;
780 }
781 }
782 }
784 if ( SP_IS_LINEARGRADIENT(server) ) {
785 guint num = SP_LINEARGRADIENT(server)->vector.stops.size();
786 GrDragger *d_temp;
787 if (lowest_i == 1) {
788 d_temp = drag->getDraggerFor (draggable->item, POINT_LG_BEGIN, 0, draggable->fill_or_stroke);
789 } else {
790 d_temp = drag->getDraggerFor (draggable->item, POINT_LG_MID, lowest_i - 1, draggable->fill_or_stroke);
791 }
792 if (d_temp)
793 *begin = d_temp->point;
795 d_temp = drag->getDraggerFor (draggable->item, POINT_LG_MID, highest_i + 1, draggable->fill_or_stroke);
796 if (d_temp == NULL) {
797 d_temp = drag->getDraggerFor (draggable->item, POINT_LG_END, num-1, draggable->fill_or_stroke);
798 }
799 if (d_temp)
800 *end = d_temp->point;
801 } else if ( SP_IS_RADIALGRADIENT(server) ) {
802 guint num = SP_RADIALGRADIENT(server)->vector.stops.size();
803 GrDragger *d_temp;
804 if (lowest_i == 1) {
805 d_temp = drag->getDraggerFor (draggable->item, POINT_RG_CENTER, 0, draggable->fill_or_stroke);
806 } else {
807 d_temp = drag->getDraggerFor (draggable->item, draggable->point_type, lowest_i - 1, draggable->fill_or_stroke);
808 }
809 if (d_temp)
810 *begin = d_temp->point;
812 d_temp = drag->getDraggerFor (draggable->item, draggable->point_type, highest_i + 1, draggable->fill_or_stroke);
813 if (d_temp == NULL) {
814 d_temp = drag->getDraggerFor (draggable->item, (draggable->point_type==POINT_RG_MID1) ? POINT_RG_R1 : POINT_RG_R2, num-1, draggable->fill_or_stroke);
815 }
816 if (d_temp)
817 *end = d_temp->point;
818 }
820 *low_lim = dragger->point - (lowest_dragger->point - *begin);
821 *high_lim = dragger->point - (highest_dragger->point - *end);
822 }
826 /**
827 Called when a midpoint knot is dragged.
828 */
829 static void
830 gr_knot_moved_midpoint_handler(SPKnot */*knot*/, Geom::Point const &ppointer, guint state, gpointer data)
831 {
832 GrDragger *dragger = (GrDragger *) data;
833 GrDrag *drag = dragger->parent;
834 // a midpoint dragger can (logically) only contain one GrDraggable
835 GrDraggable *draggable = (GrDraggable *) dragger->draggables->data;
837 // FIXME: take from prefs
838 double snap_fraction = 0.1;
840 Geom::Point p = ppointer;
841 Geom::Point begin(0,0), end(0,0);
842 Geom::Point low_lim(0,0), high_lim(0,0);
844 SPObject *server = draggable->getServer();
846 GSList *moving = NULL;
847 gr_midpoint_limits(dragger, server, &begin, &end, &low_lim, &high_lim, &moving);
849 if (state & GDK_CONTROL_MASK) {
850 p = snap_vector_midpoint (p, low_lim, high_lim, snap_fraction);
851 } else {
852 p = snap_vector_midpoint (p, low_lim, high_lim, 0);
853 if (!(state & GDK_SHIFT_MASK)) {
854 Inkscape::Snapper::SnapConstraint cl(low_lim, high_lim - low_lim);
855 SPDesktop *desktop = dragger->parent->desktop;
856 SnapManager &m = desktop->namedview->snap_manager;
857 m.setup(desktop);
858 m.constrainedSnapReturnByRef(p, Inkscape::SNAPSOURCE_OTHER_HANDLE, cl);
859 m.unSetup();
860 }
861 }
862 Geom::Point displacement = p - dragger->point;
864 for (GSList const* i = moving; i != NULL; i = i->next) {
865 GrDragger *drg = (GrDragger*) i->data;
866 SPKnot *drgknot = drg->knot;
867 Geom::Point this_move = displacement;
868 if (state & GDK_MOD1_MASK) {
869 // FIXME: unify all these profiles (here, in nodepath, in tweak) in one place
870 double alpha = 1.0;
871 if (Geom::L2(drg->point - dragger->point) + Geom::L2(drg->point - begin) - 1e-3 > Geom::L2(dragger->point - begin)) { // drg is on the end side from dragger
872 double x = Geom::L2(drg->point - dragger->point)/Geom::L2(end - dragger->point);
873 this_move = (0.5 * cos (M_PI * (pow(x, alpha))) + 0.5) * this_move;
874 } else { // drg is on the begin side from dragger
875 double x = Geom::L2(drg->point - dragger->point)/Geom::L2(begin - dragger->point);
876 this_move = (0.5 * cos (M_PI * (pow(x, alpha))) + 0.5) * this_move;
877 }
878 }
879 drg->point += this_move;
880 sp_knot_moveto (drgknot, drg->point);
881 drg->fireDraggables (false);
882 drg->updateDependencies(false);
883 }
885 g_slist_free(moving);
887 drag->keep_selection = dragger->isSelected();
888 }
892 static void
893 gr_knot_grabbed_handler (SPKnot */*knot*/, unsigned int /*state*/, gpointer data)
894 {
895 GrDragger *dragger = (GrDragger *) data;
897 sp_canvas_force_full_redraw_after_interruptions(dragger->parent->desktop->canvas, 5);
898 }
900 /**
901 Called when the mouse releases a dragger knot; changes gradient writing to repr, updates other draggers if needed
902 */
903 static void
904 gr_knot_ungrabbed_handler (SPKnot *knot, unsigned int state, gpointer data)
905 {
906 GrDragger *dragger = (GrDragger *) data;
908 sp_canvas_end_forced_full_redraws(dragger->parent->desktop->canvas);
910 dragger->point_original = dragger->point = knot->pos;
912 if ((state & GDK_CONTROL_MASK) && (state & GDK_SHIFT_MASK)) {
913 dragger->fireDraggables (true, true);
914 } else {
915 dragger->fireDraggables (true);
916 }
918 for (GList *i = dragger->parent->selected; i != NULL; i = i->next) {
919 GrDragger *d = (GrDragger *) i->data;
920 if (d == dragger)
921 continue;
922 d->fireDraggables (true);
923 }
925 // make this dragger selected
926 if (!dragger->parent->keep_selection) {
927 dragger->parent->setSelected (dragger);
928 }
929 dragger->parent->keep_selection = false;
931 dragger->updateDependencies(true);
933 // we did an undoable action
934 DocumentUndo::done(sp_desktop_document (dragger->parent->desktop), SP_VERB_CONTEXT_GRADIENT,
935 _("Move gradient handle"));
936 }
938 /**
939 Called when a dragger knot is clicked; selects the dragger or deletes it depending on the
940 state of the keyboard keys
941 */
942 static void
943 gr_knot_clicked_handler(SPKnot */*knot*/, guint state, gpointer data)
944 {
945 GrDragger *dragger = (GrDragger *) data;
946 GrDraggable *draggable = (GrDraggable *) dragger->draggables->data;
947 if (!draggable) return;
949 if ( (state & GDK_CONTROL_MASK) && (state & GDK_MOD1_MASK ) ) {
950 // delete this knot from vector
951 SPGradient *gradient = sp_item_gradient (draggable->item, draggable->fill_or_stroke);
952 gradient = gradient->getVector();
953 if (gradient->vector.stops.size() > 2) { // 2 is the minimum
954 SPStop *stop = NULL;
955 switch (draggable->point_type) { // if we delete first or last stop, move the next/previous to the edge
956 case POINT_LG_BEGIN:
957 case POINT_RG_CENTER:
958 stop = gradient->getFirstStop();
959 {
960 SPStop *next = stop->getNextStop();
961 if (next) {
962 next->offset = 0;
963 sp_repr_set_css_double (SP_OBJECT_REPR (next), "offset", 0);
964 }
965 }
966 break;
967 case POINT_LG_END:
968 case POINT_RG_R1:
969 case POINT_RG_R2:
970 stop = sp_last_stop(gradient);
971 {
972 SPStop *prev = stop->getPrevStop();
973 if (prev) {
974 prev->offset = 1;
975 sp_repr_set_css_double (SP_OBJECT_REPR (prev), "offset", 1);
976 }
977 }
978 break;
979 case POINT_LG_MID:
980 case POINT_RG_MID1:
981 case POINT_RG_MID2:
982 stop = sp_get_stop_i(gradient, draggable->point_i);
983 break;
984 }
986 SP_OBJECT_REPR(gradient)->removeChild(SP_OBJECT_REPR(stop));
987 DocumentUndo::done(SP_OBJECT_DOCUMENT (gradient), SP_VERB_CONTEXT_GRADIENT,
988 _("Delete gradient stop"));
989 }
990 } else {
991 // select the dragger
992 dragger->point_original = dragger->point;
994 if ( state & GDK_SHIFT_MASK ) {
995 dragger->parent->setSelected (dragger, true, false);
996 } else {
997 dragger->parent->setSelected (dragger);
998 }
999 }
1000 }
1002 /**
1003 Called when a dragger knot is doubleclicked; opens gradient editor with the stop from the first draggable
1004 */
1005 static void
1006 gr_knot_doubleclicked_handler (SPKnot */*knot*/, guint /*state*/, gpointer data)
1007 {
1008 GrDragger *dragger = (GrDragger *) data;
1010 dragger->point_original = dragger->point;
1012 if (dragger->draggables == NULL)
1013 return;
1015 GrDraggable *draggable = (GrDraggable *) dragger->draggables->data;
1016 sp_item_gradient_edit_stop (draggable->item, draggable->point_type, draggable->point_i, draggable->fill_or_stroke);
1017 }
1019 /**
1020 Act upon all draggables of the dragger, setting them to the dragger's point
1021 */
1022 void
1023 GrDragger::fireDraggables (bool write_repr, bool scale_radial, bool merging_focus)
1024 {
1025 for (GSList const* i = this->draggables; i != NULL; i = i->next) {
1026 GrDraggable *draggable = (GrDraggable *) i->data;
1028 // set local_change flag so that selection_changed callback does not regenerate draggers
1029 this->parent->local_change = true;
1031 // change gradient, optionally writing to repr; prevent focus from moving if it's snapped
1032 // to the center, unless it's the first update upon merge when we must snap it to the point
1033 if (merging_focus ||
1034 !(draggable->point_type == POINT_RG_FOCUS && this->isA(draggable->item, POINT_RG_CENTER, draggable->point_i, draggable->fill_or_stroke)))
1035 {
1036 sp_item_gradient_set_coords (draggable->item, draggable->point_type, draggable->point_i, this->point, draggable->fill_or_stroke, write_repr, scale_radial);
1037 }
1038 }
1039 }
1041 /**
1042 Checks if the dragger has a draggable with this point_type
1043 */
1044 bool
1045 GrDragger::isA (gint point_type)
1046 {
1047 for (GSList const* i = this->draggables; i != NULL; i = i->next) {
1048 GrDraggable *draggable = (GrDraggable *) i->data;
1049 if (draggable->point_type == point_type) {
1050 return true;
1051 }
1052 }
1053 return false;
1054 }
1056 /**
1057 Checks if the dragger has a draggable with this item, point_type + point_i (number), fill_or_stroke
1058 */
1059 bool
1060 GrDragger::isA (SPItem *item, gint point_type, gint point_i, bool fill_or_stroke)
1061 {
1062 for (GSList const* i = this->draggables; i != NULL; i = i->next) {
1063 GrDraggable *draggable = (GrDraggable *) i->data;
1064 if ( (draggable->point_type == point_type) && (draggable->point_i == point_i) && (draggable->item == item) && (draggable->fill_or_stroke == fill_or_stroke) ) {
1065 return true;
1066 }
1067 }
1068 return false;
1069 }
1071 /**
1072 Checks if the dragger has a draggable with this item, point_type, fill_or_stroke
1073 */
1074 bool
1075 GrDragger::isA (SPItem *item, gint point_type, bool fill_or_stroke)
1076 {
1077 for (GSList const* i = this->draggables; i != NULL; i = i->next) {
1078 GrDraggable *draggable = (GrDraggable *) i->data;
1079 if ( (draggable->point_type == point_type) && (draggable->item == item) && (draggable->fill_or_stroke == fill_or_stroke) ) {
1080 return true;
1081 }
1082 }
1083 return false;
1084 }
1086 bool
1087 GrDraggable::mayMerge (GrDraggable *da2)
1088 {
1089 if ((this->item == da2->item) && (this->fill_or_stroke == da2->fill_or_stroke)) {
1090 // we must not merge the points of the same gradient!
1091 if (!((this->point_type == POINT_RG_FOCUS && da2->point_type == POINT_RG_CENTER) ||
1092 (this->point_type == POINT_RG_CENTER && da2->point_type == POINT_RG_FOCUS))) {
1093 // except that we can snap center and focus together
1094 return false;
1095 }
1096 }
1097 // disable merging of midpoints.
1098 if ( (this->point_type == POINT_LG_MID) || (da2->point_type == POINT_LG_MID)
1099 || (this->point_type == POINT_RG_MID1) || (da2->point_type == POINT_RG_MID1)
1100 || (this->point_type == POINT_RG_MID2) || (da2->point_type == POINT_RG_MID2) )
1101 return false;
1103 return true;
1104 }
1106 bool
1107 GrDragger::mayMerge (GrDragger *other)
1108 {
1109 if (this == other)
1110 return false;
1112 for (GSList const* i = this->draggables; i != NULL; i = i->next) { // for all draggables of this
1113 GrDraggable *da1 = (GrDraggable *) i->data;
1114 for (GSList const* j = other->draggables; j != NULL; j = j->next) { // for all draggables of other
1115 GrDraggable *da2 = (GrDraggable *) j->data;
1116 if (!da1->mayMerge(da2))
1117 return false;
1118 }
1119 }
1120 return true;
1121 }
1123 bool
1124 GrDragger::mayMerge (GrDraggable *da2)
1125 {
1126 for (GSList const* i = this->draggables; i != NULL; i = i->next) { // for all draggables of this
1127 GrDraggable *da1 = (GrDraggable *) i->data;
1128 if (!da1->mayMerge(da2))
1129 return false;
1130 }
1131 return true;
1132 }
1134 /**
1135 Updates the statusbar tip of the dragger knot, based on its draggables
1136 */
1137 void
1138 GrDragger::updateTip ()
1139 {
1140 if (this->knot && this->knot->tip) {
1141 g_free (this->knot->tip);
1142 this->knot->tip = NULL;
1143 }
1145 if (g_slist_length (this->draggables) == 1) {
1146 GrDraggable *draggable = (GrDraggable *) this->draggables->data;
1147 char *item_desc = draggable->item->description();
1148 switch (draggable->point_type) {
1149 case POINT_LG_MID:
1150 case POINT_RG_MID1:
1151 case POINT_RG_MID2:
1152 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"),
1153 _(gr_knot_descr[draggable->point_type]),
1154 draggable->point_i,
1155 item_desc,
1156 draggable->fill_or_stroke == false ? _(" (stroke)") : "");
1157 break;
1159 default:
1160 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"),
1161 _(gr_knot_descr[draggable->point_type]),
1162 item_desc,
1163 draggable->fill_or_stroke == false ? _(" (stroke)") : "");
1164 break;
1165 }
1166 g_free(item_desc);
1167 } else if (g_slist_length (draggables) == 2 && isA (POINT_RG_CENTER) && isA (POINT_RG_FOCUS)) {
1168 this->knot->tip = g_strdup_printf (_("Radial gradient <b>center</b> and <b>focus</b>; drag with <b>Shift</b> to separate focus"));
1169 } else {
1170 int length = g_slist_length (this->draggables);
1171 this->knot->tip = g_strdup_printf (ngettext("Gradient point shared by <b>%d</b> gradient; drag with <b>Shift</b> to separate",
1172 "Gradient point shared by <b>%d</b> gradients; drag with <b>Shift</b> to separate",
1173 length),
1174 length);
1175 }
1176 }
1178 /**
1179 Adds a draggable to the dragger
1180 */
1181 void
1182 GrDragger::updateKnotShape ()
1183 {
1184 if (!draggables)
1185 return;
1186 GrDraggable *last = (GrDraggable *) g_slist_last(draggables)->data;
1187 g_object_set (G_OBJECT (this->knot->item), "shape", gr_knot_shapes[last->point_type], NULL);
1188 }
1190 /**
1191 Adds a draggable to the dragger
1192 */
1193 void
1194 GrDragger::addDraggable (GrDraggable *draggable)
1195 {
1196 this->draggables = g_slist_prepend (this->draggables, draggable);
1198 this->updateTip();
1199 }
1202 /**
1203 Moves this dragger to the point of the given draggable, acting upon all other draggables
1204 */
1205 void
1206 GrDragger::moveThisToDraggable (SPItem *item, gint point_type, gint point_i, bool fill_or_stroke, bool write_repr)
1207 {
1208 GrDraggable *dr_first = (GrDraggable *) this->draggables->data;
1209 if (!dr_first) return;
1211 this->point = sp_item_gradient_get_coords (dr_first->item, dr_first->point_type, dr_first->point_i, dr_first->fill_or_stroke);
1212 this->point_original = this->point;
1214 sp_knot_moveto (this->knot, this->point);
1216 for (GSList const* i = this->draggables; i != NULL; i = i->next) {
1217 GrDraggable *da = (GrDraggable *) i->data;
1218 if ( (da->item == item) &&
1219 (point_type == -1 || da->point_type == point_type) &&
1220 (point_i == -1 || da->point_i == point_i) &&
1221 (da->fill_or_stroke == fill_or_stroke) ) {
1222 continue;
1223 }
1224 sp_item_gradient_set_coords (da->item, da->point_type, da->point_i, this->point, da->fill_or_stroke, write_repr, false);
1225 }
1226 // FIXME: here we should also call this->updateDependencies(write_repr); to propagate updating, but how to prevent loops?
1227 }
1230 /**
1231 Moves all midstop draggables that depend on this one
1232 */
1233 void
1234 GrDragger::updateMidstopDependencies (GrDraggable *draggable, bool write_repr) {
1235 SPObject *server = draggable->getServer();
1236 if (!server)
1237 return;
1238 guint num = SP_GRADIENT(server)->vector.stops.size();
1239 if (num <= 2) return;
1241 if ( SP_IS_LINEARGRADIENT(server) ) {
1242 for ( guint i = 1; i < num - 1; i++ ) {
1243 this->moveOtherToDraggable (draggable->item, POINT_LG_MID, i, draggable->fill_or_stroke, write_repr);
1244 }
1245 } else if ( SP_IS_RADIALGRADIENT(server) ) {
1246 for ( guint i = 1; i < num - 1; i++ ) {
1247 this->moveOtherToDraggable (draggable->item, POINT_RG_MID1, i, draggable->fill_or_stroke, write_repr);
1248 this->moveOtherToDraggable (draggable->item, POINT_RG_MID2, i, draggable->fill_or_stroke, write_repr);
1249 }
1250 }
1251 }
1254 /**
1255 Moves all draggables that depend on this one
1256 */
1257 void
1258 GrDragger::updateDependencies (bool write_repr)
1259 {
1260 for (GSList const* i = this->draggables; i != NULL; i = i->next) {
1261 GrDraggable *draggable = (GrDraggable *) i->data;
1262 switch (draggable->point_type) {
1263 case POINT_LG_BEGIN:
1264 {
1265 // the end point is dependent only when dragging with ctrl+shift
1266 this->moveOtherToDraggable (draggable->item, POINT_LG_END, -1, draggable->fill_or_stroke, write_repr);
1268 this->updateMidstopDependencies (draggable, write_repr);
1269 }
1270 break;
1271 case POINT_LG_END:
1272 {
1273 // the begin point is dependent only when dragging with ctrl+shift
1274 this->moveOtherToDraggable (draggable->item, POINT_LG_BEGIN, 0, draggable->fill_or_stroke, write_repr);
1276 this->updateMidstopDependencies (draggable, write_repr);
1277 }
1278 break;
1279 case POINT_LG_MID:
1280 // no other nodes depend on mid points.
1281 break;
1282 case POINT_RG_R2:
1283 this->moveOtherToDraggable (draggable->item, POINT_RG_R1, -1, draggable->fill_or_stroke, write_repr);
1284 this->moveOtherToDraggable (draggable->item, POINT_RG_FOCUS, -1, draggable->fill_or_stroke, write_repr);
1285 this->updateMidstopDependencies (draggable, write_repr);
1286 break;
1287 case POINT_RG_R1:
1288 this->moveOtherToDraggable (draggable->item, POINT_RG_R2, -1, draggable->fill_or_stroke, write_repr);
1289 this->moveOtherToDraggable (draggable->item, POINT_RG_FOCUS, -1, draggable->fill_or_stroke, write_repr);
1290 this->updateMidstopDependencies (draggable, write_repr);
1291 break;
1292 case POINT_RG_CENTER:
1293 this->moveOtherToDraggable (draggable->item, POINT_RG_R1, -1, draggable->fill_or_stroke, write_repr);
1294 this->moveOtherToDraggable (draggable->item, POINT_RG_R2, -1, draggable->fill_or_stroke, write_repr);
1295 this->moveOtherToDraggable (draggable->item, POINT_RG_FOCUS, -1, draggable->fill_or_stroke, write_repr);
1296 this->updateMidstopDependencies (draggable, write_repr);
1297 break;
1298 case POINT_RG_FOCUS:
1299 // nothing can depend on that
1300 break;
1301 case POINT_RG_MID1:
1302 this->moveOtherToDraggable (draggable->item, POINT_RG_MID2, draggable->point_i, draggable->fill_or_stroke, write_repr);
1303 break;
1304 case POINT_RG_MID2:
1305 this->moveOtherToDraggable (draggable->item, POINT_RG_MID1, draggable->point_i, draggable->fill_or_stroke, write_repr);
1306 break;
1307 default:
1308 break;
1309 }
1310 }
1311 }
1315 GrDragger::GrDragger (GrDrag *parent, Geom::Point p, GrDraggable *draggable)
1316 : point(p),
1317 point_original(p)
1318 {
1319 this->draggables = NULL;
1321 this->parent = parent;
1323 // create the knot
1324 this->knot = sp_knot_new (parent->desktop, NULL);
1325 this->knot->setMode(SP_KNOT_MODE_XOR);
1326 this->knot->setFill(GR_KNOT_COLOR_NORMAL, GR_KNOT_COLOR_MOUSEOVER, GR_KNOT_COLOR_MOUSEOVER);
1327 this->knot->setStroke(0x0000007f, 0x0000007f, 0x0000007f);
1328 sp_knot_update_ctrl(this->knot);
1330 // move knot to the given point
1331 sp_knot_set_position (this->knot, p, SP_KNOT_STATE_NORMAL);
1332 sp_knot_show (this->knot);
1334 // connect knot's signals
1335 if ( (draggable) // it can be NULL if a node in unsnapped (eg. focus point unsnapped from center)
1336 // luckily, midstops never snap to other nodes so are never unsnapped...
1337 && ( (draggable->point_type == POINT_LG_MID)
1338 || (draggable->point_type == POINT_RG_MID1)
1339 || (draggable->point_type == POINT_RG_MID2) ) )
1340 {
1341 this->handler_id = g_signal_connect (G_OBJECT (this->knot), "moved", G_CALLBACK (gr_knot_moved_midpoint_handler), this);
1342 } else {
1343 this->handler_id = g_signal_connect (G_OBJECT (this->knot), "moved", G_CALLBACK (gr_knot_moved_handler), this);
1344 }
1345 g_signal_connect (G_OBJECT (this->knot), "clicked", G_CALLBACK (gr_knot_clicked_handler), this);
1346 g_signal_connect (G_OBJECT (this->knot), "doubleclicked", G_CALLBACK (gr_knot_doubleclicked_handler), this);
1347 g_signal_connect (G_OBJECT (this->knot), "grabbed", G_CALLBACK (gr_knot_grabbed_handler), this);
1348 g_signal_connect (G_OBJECT (this->knot), "ungrabbed", G_CALLBACK (gr_knot_ungrabbed_handler), this);
1350 // add the initial draggable
1351 if (draggable)
1352 this->addDraggable (draggable);
1353 updateKnotShape();
1354 }
1356 GrDragger::~GrDragger ()
1357 {
1358 // unselect if it was selected
1359 this->parent->setDeselected(this);
1361 // disconnect signals
1362 g_signal_handlers_disconnect_by_func(G_OBJECT(this->knot), (gpointer) G_CALLBACK (gr_knot_moved_handler), this);
1363 g_signal_handlers_disconnect_by_func(G_OBJECT(this->knot), (gpointer) G_CALLBACK (gr_knot_clicked_handler), this);
1364 g_signal_handlers_disconnect_by_func(G_OBJECT(this->knot), (gpointer) G_CALLBACK (gr_knot_doubleclicked_handler), this);
1365 g_signal_handlers_disconnect_by_func(G_OBJECT(this->knot), (gpointer) G_CALLBACK (gr_knot_grabbed_handler), this);
1366 g_signal_handlers_disconnect_by_func(G_OBJECT(this->knot), (gpointer) G_CALLBACK (gr_knot_ungrabbed_handler), this);
1368 /* unref should call destroy */
1369 g_object_unref (G_OBJECT (this->knot));
1371 // delete all draggables
1372 for (GSList const* i = this->draggables; i != NULL; i = i->next) {
1373 delete ((GrDraggable *) i->data);
1374 }
1375 g_slist_free (this->draggables);
1376 this->draggables = NULL;
1377 }
1379 /**
1380 Select the dragger which has the given draggable.
1381 */
1382 GrDragger *
1383 GrDrag::getDraggerFor (SPItem *item, gint point_type, gint point_i, bool fill_or_stroke)
1384 {
1385 for (GList const* i = this->draggers; i != NULL; i = i->next) {
1386 GrDragger *dragger = (GrDragger *) i->data;
1387 for (GSList const* j = dragger->draggables; j != NULL; j = j->next) {
1388 GrDraggable *da2 = (GrDraggable *) j->data;
1389 if ( (da2->item == item) &&
1390 (point_type == -1 || da2->point_type == point_type) && // -1 means this does not matter
1391 (point_i == -1 || da2->point_i == point_i) && // -1 means this does not matter
1392 (da2->fill_or_stroke == fill_or_stroke)) {
1393 return (dragger);
1394 }
1395 }
1396 }
1397 return NULL;
1398 }
1401 void
1402 GrDragger::moveOtherToDraggable (SPItem *item, gint point_type, gint point_i, bool fill_or_stroke, bool write_repr)
1403 {
1404 GrDragger *d = this->parent->getDraggerFor (item, point_type, point_i, fill_or_stroke);
1405 if (d && d != this) {
1406 d->moveThisToDraggable (item, point_type, point_i, fill_or_stroke, write_repr);
1407 }
1408 }
1411 /**
1412 Draw this dragger as selected
1413 */
1414 void
1415 GrDragger::select()
1416 {
1417 this->knot->fill [SP_KNOT_STATE_NORMAL] = GR_KNOT_COLOR_SELECTED;
1418 g_object_set (G_OBJECT (this->knot->item), "fill_color", GR_KNOT_COLOR_SELECTED, NULL);
1419 }
1421 /**
1422 Draw this dragger as normal (deselected)
1423 */
1424 void
1425 GrDragger::deselect()
1426 {
1427 this->knot->fill [SP_KNOT_STATE_NORMAL] = GR_KNOT_COLOR_NORMAL;
1428 g_object_set (G_OBJECT (this->knot->item), "fill_color", GR_KNOT_COLOR_NORMAL, NULL);
1429 }
1431 bool
1432 GrDragger::isSelected()
1433 {
1434 return g_list_find (parent->selected, this);
1435 }
1437 /**
1438 \brief Deselect all stops/draggers (private)
1439 */
1440 void
1441 GrDrag::deselect_all()
1442 {
1443 while (selected) {
1444 ( (GrDragger*) selected->data)->deselect();
1445 selected = g_list_remove(selected, selected->data);
1446 }
1447 }
1449 /**
1450 \brief Deselect all stops/draggers (public; emits signal)
1451 */
1452 void
1453 GrDrag::deselectAll()
1454 {
1455 deselect_all();
1456 this->desktop->emitToolSubselectionChanged(NULL);
1457 }
1459 /**
1460 \brief Select all stops/draggers
1461 */
1462 void
1463 GrDrag::selectAll()
1464 {
1465 for (GList *l = this->draggers; l != NULL; l = l->next) {
1466 GrDragger *d = ((GrDragger *) l->data);
1467 setSelected (d, true, true);
1468 }
1469 }
1471 /**
1472 \brief Select all stops/draggers that match the coords
1473 */
1474 void
1475 GrDrag::selectByCoords(std::vector<Geom::Point> coords)
1476 {
1477 for (GList *l = this->draggers; l != NULL; l = l->next) {
1478 GrDragger *d = ((GrDragger *) l->data);
1479 for (guint k = 0; k < coords.size(); k++) {
1480 if (Geom::L2 (d->point - coords[k]) < 1e-4) {
1481 setSelected (d, true, true);
1482 }
1483 }
1484 }
1485 }
1488 /**
1489 \brief Select all stops/draggers that fall within the rect
1490 */
1491 void
1492 GrDrag::selectRect(Geom::Rect const &r)
1493 {
1494 for (GList *l = this->draggers; l != NULL; l = l->next) {
1495 GrDragger *d = ((GrDragger *) l->data);
1496 if (r.contains(d->point)) {
1497 setSelected (d, true, true);
1498 }
1499 }
1500 }
1502 /**
1503 \brief Select a dragger
1504 \param dragger The dragger to select
1505 \param add_to_selection If true, add to selection, otherwise deselect others
1506 \param override If true, always select this node, otherwise toggle selected status
1507 */
1508 void
1509 GrDrag::setSelected (GrDragger *dragger, bool add_to_selection, bool override)
1510 {
1511 GrDragger *seldragger = NULL;
1513 if (add_to_selection) {
1514 if (!dragger) return;
1515 if (override) {
1516 if (!g_list_find(selected, dragger)) {
1517 selected = g_list_prepend(selected, dragger);
1518 }
1519 dragger->select();
1520 seldragger = dragger;
1521 } else { // toggle
1522 if (g_list_find(selected, dragger)) {
1523 selected = g_list_remove(selected, dragger);
1524 dragger->deselect();
1525 if (selected) {
1526 seldragger = (GrDragger*) selected->data; // select the dragger that is first in the list
1527 }
1528 } else {
1529 selected = g_list_prepend(selected, dragger);
1530 dragger->select();
1531 seldragger = dragger;
1532 }
1533 }
1534 } else {
1535 deselect_all();
1536 if (dragger) {
1537 selected = g_list_prepend(selected, dragger);
1538 dragger->select();
1539 seldragger = dragger;
1540 }
1541 }
1542 if (seldragger) {
1543 this->desktop->emitToolSubselectionChanged((gpointer) seldragger);
1544 }
1545 }
1547 /**
1548 \brief Deselect a dragger
1549 \param dragger The dragger to deselect
1550 */
1551 void
1552 GrDrag::setDeselected (GrDragger *dragger)
1553 {
1554 if (g_list_find(selected, dragger)) {
1555 selected = g_list_remove(selected, dragger);
1556 dragger->deselect();
1557 }
1558 this->desktop->emitToolSubselectionChanged((gpointer) (selected ? selected->data : NULL ));
1559 }
1563 /**
1564 Create a line from p1 to p2 and add it to the lines list
1565 */
1566 void
1567 GrDrag::addLine (SPItem *item, Geom::Point p1, Geom::Point p2, guint32 rgba)
1568 {
1569 SPCanvasItem *line = sp_canvas_item_new(sp_desktop_controls(this->desktop),
1570 SP_TYPE_CTRLLINE, NULL);
1571 sp_canvas_item_move_to_z(line, 0);
1572 SP_CTRLLINE(line)->item = item;
1573 sp_ctrlline_set_coords(SP_CTRLLINE(line), p1, p2);
1574 if (rgba != GR_LINE_COLOR_FILL) // fill is the default, so don't set color for it to speed up redraw
1575 sp_ctrlline_set_rgba32 (SP_CTRLLINE(line), rgba);
1576 sp_canvas_item_show (line);
1577 this->lines = g_slist_append (this->lines, line);
1578 }
1580 /**
1581 If there already exists a dragger within MERGE_DIST of p, add the draggable to it; otherwise create
1582 new dragger and add it to draggers list
1583 */
1584 void
1585 GrDrag::addDragger (GrDraggable *draggable)
1586 {
1587 Geom::Point p = sp_item_gradient_get_coords (draggable->item, draggable->point_type, draggable->point_i, draggable->fill_or_stroke);
1589 for (GList *i = this->draggers; i != NULL; i = i->next) {
1590 GrDragger *dragger = (GrDragger *) i->data;
1591 if (dragger->mayMerge (draggable) && Geom::L2 (dragger->point - p) < MERGE_DIST) {
1592 // distance is small, merge this draggable into dragger, no need to create new dragger
1593 dragger->addDraggable (draggable);
1594 dragger->updateKnotShape();
1595 return;
1596 }
1597 }
1599 GrDragger *new_dragger = new GrDragger(this, p, draggable);
1600 // fixme: draggers should be added AFTER the last one: this way tabbing through them will be from begin to end.
1601 this->draggers = g_list_append (this->draggers, new_dragger);
1602 }
1604 /**
1605 Add draggers for the radial gradient rg on item
1606 */
1607 void
1608 GrDrag::addDraggersRadial (SPRadialGradient *rg, SPItem *item, bool fill_or_stroke)
1609 {
1610 addDragger (new GrDraggable (item, POINT_RG_CENTER, 0, fill_or_stroke));
1611 guint num = rg->vector.stops.size();
1612 if (num > 2) {
1613 for ( guint i = 1; i < num - 1; i++ ) {
1614 addDragger (new GrDraggable (item, POINT_RG_MID1, i, fill_or_stroke));
1615 }
1616 }
1617 addDragger (new GrDraggable (item, POINT_RG_R1, num-1, fill_or_stroke));
1618 if (num > 2) {
1619 for ( guint i = 1; i < num - 1; i++ ) {
1620 addDragger (new GrDraggable (item, POINT_RG_MID2, i, fill_or_stroke));
1621 }
1622 }
1623 addDragger (new GrDraggable (item, POINT_RG_R2, num-1, fill_or_stroke));
1624 addDragger (new GrDraggable (item, POINT_RG_FOCUS, 0, fill_or_stroke));
1625 }
1627 /**
1628 Add draggers for the linear gradient lg on item
1629 */
1630 void
1631 GrDrag::addDraggersLinear (SPLinearGradient *lg, SPItem *item, bool fill_or_stroke)
1632 {
1633 addDragger (new GrDraggable (item, POINT_LG_BEGIN, 0, fill_or_stroke));
1634 guint num = lg->vector.stops.size();
1635 if (num > 2) {
1636 for ( guint i = 1; i < num - 1; i++ ) {
1637 addDragger (new GrDraggable (item, POINT_LG_MID, i, fill_or_stroke));
1638 }
1639 }
1640 addDragger (new GrDraggable (item, POINT_LG_END, num-1, fill_or_stroke));
1641 }
1643 /**
1644 Artificially grab the knot of this dragger; used by the gradient context
1645 */
1646 void
1647 GrDrag::grabKnot (GrDragger *dragger, gint x, gint y, guint32 etime)
1648 {
1649 if (dragger) {
1650 sp_knot_start_dragging (dragger->knot, dragger->point, x, y, etime);
1651 }
1652 }
1654 /**
1655 Artificially grab the knot of the dragger with this draggable; used by the gradient context
1656 */
1657 void
1658 GrDrag::grabKnot (SPItem *item, gint point_type, gint point_i, bool fill_or_stroke, gint x, gint y, guint32 etime)
1659 {
1660 GrDragger *dragger = getDraggerFor (item, point_type, point_i, fill_or_stroke);
1661 if (dragger) {
1662 sp_knot_start_dragging (dragger->knot, dragger->point, x, y, etime);
1663 }
1664 }
1666 /**
1667 Regenerates the draggers list from the current selection; is called when selection is changed or
1668 modified, also when a radial dragger needs to update positions of other draggers in the gradient
1669 */
1670 void GrDrag::updateDraggers ()
1671 {
1672 while (selected) {
1673 selected = g_list_remove(selected, selected->data);
1674 }
1675 // delete old draggers
1676 for (GList const* i = this->draggers; i != NULL; i = i->next) {
1677 delete static_cast<GrDragger *>(i->data);
1678 }
1679 g_list_free(this->draggers);
1680 this->draggers = NULL;
1682 g_return_if_fail(this->selection != NULL);
1684 for (GSList const* i = this->selection->itemList(); i != NULL; i = i->next) {
1685 SPItem *item = SP_ITEM(i->data);
1686 SPStyle *style = item->style;
1688 if (style && (style->fill.isPaintserver())) {
1689 SPPaintServer *server = style->getFillPaintServer();
1690 if ( server && server->isSolid() ) {
1691 // Suppress "gradientness" of solid paint
1692 } else if ( SP_IS_LINEARGRADIENT(server) ) {
1693 addDraggersLinear( SP_LINEARGRADIENT(server), item, true );
1694 } else if ( SP_IS_RADIALGRADIENT(server) ) {
1695 addDraggersRadial( SP_RADIALGRADIENT(server), item, true );
1696 }
1697 }
1699 if (style && (style->stroke.isPaintserver())) {
1700 SPPaintServer *server = style->getStrokePaintServer();
1701 if ( server && server->isSolid() ) {
1702 // Suppress "gradientness" of solid paint
1703 } else if ( SP_IS_LINEARGRADIENT(server) ) {
1704 addDraggersLinear( SP_LINEARGRADIENT(server), item, false );
1705 } else if ( SP_IS_RADIALGRADIENT(server) ) {
1706 addDraggersRadial( SP_RADIALGRADIENT(server), item, false );
1707 }
1708 }
1709 }
1710 }
1713 /**
1714 * \brief Returns true if at least one of the draggers' knots has the mouse hovering above it
1715 */
1717 bool
1718 GrDrag::mouseOver()
1719 {
1720 for (GList const* i = this->draggers; i != NULL; i = i->next) {
1721 GrDragger *d = (GrDragger *) i->data;
1722 if (d->knot && (d->knot->flags & SP_KNOT_MOUSEOVER)) {
1723 return true;
1724 }
1725 }
1726 return false;
1727 }
1728 /**
1729 Regenerates the lines list from the current selection; is called on each move of a dragger, so that
1730 lines are always in sync with the actual gradient
1731 */
1732 void
1733 GrDrag::updateLines ()
1734 {
1735 // delete old lines
1736 for (GSList const *i = this->lines; i != NULL; i = i->next) {
1737 gtk_object_destroy( GTK_OBJECT (i->data));
1738 }
1739 g_slist_free (this->lines);
1740 this->lines = NULL;
1742 g_return_if_fail (this->selection != NULL);
1744 for (GSList const* i = this->selection->itemList(); i != NULL; i = i->next) {
1746 SPItem *item = SP_ITEM(i->data);
1748 SPStyle *style = SP_OBJECT_STYLE (item);
1750 if (style && (style->fill.isPaintserver())) {
1751 SPPaintServer *server = item->style->getFillPaintServer();
1752 if ( server && server->isSolid() ) {
1753 // Suppress "gradientness" of solid paint
1754 } else if ( SP_IS_LINEARGRADIENT(server) ) {
1755 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);
1756 } else if ( SP_IS_RADIALGRADIENT(server) ) {
1757 Geom::Point center = sp_item_gradient_get_coords (item, POINT_RG_CENTER, 0, true);
1758 this->addLine (item, center, sp_item_gradient_get_coords (item, POINT_RG_R1, 0, true), GR_LINE_COLOR_FILL);
1759 this->addLine (item, center, sp_item_gradient_get_coords (item, POINT_RG_R2, 0, true), GR_LINE_COLOR_FILL);
1760 }
1761 }
1763 if (style && (style->stroke.isPaintserver())) {
1764 SPPaintServer *server = item->style->getStrokePaintServer();
1765 if ( server && server->isSolid() ) {
1766 // Suppress "gradientness" of solid paint
1767 } else if ( SP_IS_LINEARGRADIENT(server) ) {
1768 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);
1769 } else if ( SP_IS_RADIALGRADIENT(server) ) {
1770 Geom::Point center = sp_item_gradient_get_coords (item, POINT_RG_CENTER, 0, false);
1771 this->addLine (item, center, sp_item_gradient_get_coords (item, POINT_RG_R1, 0, false), GR_LINE_COLOR_STROKE);
1772 this->addLine (item, center, sp_item_gradient_get_coords (item, POINT_RG_R2, 0, false), GR_LINE_COLOR_STROKE);
1773 }
1774 }
1775 }
1776 }
1778 /**
1779 Regenerates the levels list from the current selection
1780 */
1781 void
1782 GrDrag::updateLevels ()
1783 {
1784 hor_levels.clear();
1785 vert_levels.clear();
1787 g_return_if_fail (this->selection != NULL);
1789 for (GSList const* i = this->selection->itemList(); i != NULL; i = i->next) {
1790 SPItem *item = SP_ITEM(i->data);
1791 Geom::OptRect rect = item->getBboxDesktop ();
1792 if (rect) {
1793 // Remember the edges of the bbox and the center axis
1794 hor_levels.push_back(rect->min()[Geom::Y]);
1795 hor_levels.push_back(rect->max()[Geom::Y]);
1796 hor_levels.push_back(0.5 * (rect->min()[Geom::Y] + rect->max()[Geom::Y]));
1797 vert_levels.push_back(rect->min()[Geom::X]);
1798 vert_levels.push_back(rect->max()[Geom::X]);
1799 vert_levels.push_back(0.5 * (rect->min()[Geom::X] + rect->max()[Geom::X]));
1800 }
1801 }
1802 }
1804 void
1805 GrDrag::selected_reverse_vector ()
1806 {
1807 if (selected == NULL)
1808 return;
1810 for (GSList const* i = ( (GrDragger*) selected->data )->draggables; i != NULL; i = i->next) {
1811 GrDraggable *draggable = (GrDraggable *) i->data;
1813 sp_item_gradient_reverse_vector (draggable->item, draggable->fill_or_stroke);
1814 }
1815 }
1817 void
1818 GrDrag::selected_move_nowrite (double x, double y, bool scale_radial)
1819 {
1820 selected_move (x, y, false, scale_radial);
1821 }
1823 void
1824 GrDrag::selected_move (double x, double y, bool write_repr, bool scale_radial)
1825 {
1826 if (selected == NULL)
1827 return;
1829 bool did = false;
1831 for (GList *i = selected; i != NULL; i = i->next) {
1832 GrDragger *d = (GrDragger *) i->data;
1834 if (!d->isA(POINT_LG_MID) && !d->isA(POINT_RG_MID1) && !d->isA(POINT_RG_MID2)) {
1835 // if this is an endpoint,
1837 // Moving an rg center moves its focus and radii as well.
1838 // therefore, if this is a focus or radius and if selection
1839 // contains the center as well, do not move this one
1840 if (d->isA(POINT_RG_R1) || d->isA(POINT_RG_R2) ||
1841 (d->isA(POINT_RG_FOCUS) && !d->isA(POINT_RG_CENTER))) {
1842 bool skip_radius_with_center = false;
1843 for (GList *di = selected; di != NULL; di = di->next) {
1844 GrDragger *d_new = (GrDragger *) di->data;
1845 if (d_new->isA (((GrDraggable *) d->draggables->data)->item,
1846 POINT_RG_CENTER,
1847 0,
1848 ((GrDraggable *) d->draggables->data)->fill_or_stroke)) {
1849 // FIXME: here we take into account only the first draggable!
1850 skip_radius_with_center = true;
1851 }
1852 }
1853 if (skip_radius_with_center)
1854 continue;
1855 }
1857 did = true;
1858 d->point += Geom::Point (x, y);
1859 d->point_original = d->point;
1860 sp_knot_moveto (d->knot, d->point);
1862 d->fireDraggables (write_repr, scale_radial);
1864 d->updateDependencies(write_repr);
1865 }
1866 }
1868 if (write_repr && did) {
1869 // we did an undoable action
1870 DocumentUndo::maybeDone(sp_desktop_document (desktop), "grmoveh", SP_VERB_CONTEXT_GRADIENT,
1871 _("Move gradient handle(s)"));
1872 return;
1873 }
1875 if (!did) { // none of the end draggers are selected, so let's try to move the mids
1877 GrDragger *dragger = (GrDragger *) selected->data;
1878 // a midpoint dragger can (logically) only contain one GrDraggable
1879 GrDraggable *draggable = (GrDraggable *) dragger->draggables->data;
1881 Geom::Point begin(0,0), end(0,0);
1882 Geom::Point low_lim(0,0), high_lim(0,0);
1884 SPObject *server = draggable->getServer();
1885 GSList *moving = NULL;
1886 gr_midpoint_limits(dragger, server, &begin, &end, &low_lim, &high_lim, &moving);
1888 Geom::Point p(x, y);
1889 p = snap_vector_midpoint (dragger->point + p, low_lim, high_lim, 0);
1890 Geom::Point displacement = p - dragger->point;
1892 for (GSList const* i = moving; i != NULL; i = i->next) {
1893 GrDragger *drg = (GrDragger*) i->data;
1894 SPKnot *drgknot = drg->knot;
1895 drg->point += displacement;
1896 sp_knot_moveto (drgknot, drg->point);
1897 drg->fireDraggables (true);
1898 drg->updateDependencies(true);
1899 did = true;
1900 }
1902 g_slist_free(moving);
1904 if (write_repr && did) {
1905 // we did an undoable action
1906 DocumentUndo::maybeDone(sp_desktop_document (desktop), "grmovem", SP_VERB_CONTEXT_GRADIENT,
1907 _("Move gradient mid stop(s)"));
1908 }
1909 }
1910 }
1912 void
1913 GrDrag::selected_move_screen (double x, double y)
1914 {
1915 gdouble zoom = desktop->current_zoom();
1916 gdouble zx = x / zoom;
1917 gdouble zy = y / zoom;
1919 selected_move (zx, zy);
1920 }
1922 /**
1923 Select the knot next to the last selected one and deselect all other selected.
1924 */
1925 GrDragger *
1926 GrDrag::select_next ()
1927 {
1928 GrDragger *d = NULL;
1929 if (selected == NULL || g_list_find(draggers, selected->data)->next == NULL) {
1930 if (draggers)
1931 d = (GrDragger *) draggers->data;
1932 } else {
1933 d = (GrDragger *) g_list_find(draggers, selected->data)->next->data;
1934 }
1935 if (d)
1936 setSelected (d);
1937 return d;
1938 }
1940 /**
1941 Select the knot previous from the last selected one and deselect all other selected.
1942 */
1943 GrDragger *
1944 GrDrag::select_prev ()
1945 {
1946 GrDragger *d = NULL;
1947 if (selected == NULL || g_list_find(draggers, selected->data)->prev == NULL) {
1948 if (draggers)
1949 d = (GrDragger *) g_list_last (draggers)->data;
1950 } else {
1951 d = (GrDragger *) g_list_find(draggers, selected->data)->prev->data;
1952 }
1953 if (d)
1954 setSelected (d);
1955 return d;
1956 }
1959 // FIXME: i.m.o. an ugly function that I just made to work, but... aargh! (Johan)
1960 void
1961 GrDrag::deleteSelected (bool just_one)
1962 {
1963 if (!selected) return;
1965 SPDocument *document = false;
1967 struct StructStopInfo {
1968 SPStop * spstop;
1969 GrDraggable * draggable;
1970 SPGradient * gradient;
1971 SPGradient * vector;
1972 };
1974 GSList *midstoplist = NULL; // list of stops that must be deleted (will be deleted first)
1975 GSList *endstoplist = NULL; // list of stops that must be deleted
1976 while (selected) {
1977 GrDragger *dragger = (GrDragger*) selected->data;
1978 for (GSList * drgble = dragger->draggables; drgble != NULL; drgble = drgble->next) {
1979 GrDraggable *draggable = (GrDraggable*) drgble->data;
1980 SPGradient *gradient = sp_item_gradient (draggable->item, draggable->fill_or_stroke);
1981 SPGradient *vector = sp_gradient_get_forked_vector_if_necessary (gradient, false);
1983 switch (draggable->point_type) {
1984 case POINT_LG_MID:
1985 case POINT_RG_MID1:
1986 case POINT_RG_MID2:
1987 {
1988 SPStop *stop = sp_get_stop_i(vector, draggable->point_i);
1989 // check if already present in list. (e.g. when both RG_MID1 and RG_MID2 were selected)
1990 bool present = false;
1991 for (GSList const * l = midstoplist; l != NULL; l = l->next) {
1992 if ( (SPStop*)l->data == stop ) {
1993 present = true;
1994 break; // no need to search further.
1995 }
1996 }
1997 if (!present)
1998 midstoplist = g_slist_append(midstoplist, stop);
1999 }
2000 break;
2001 case POINT_LG_BEGIN:
2002 case POINT_LG_END:
2003 case POINT_RG_CENTER:
2004 case POINT_RG_R1:
2005 case POINT_RG_R2:
2006 {
2007 SPStop *stop = NULL;
2008 if ( (draggable->point_type == POINT_LG_BEGIN) || (draggable->point_type == POINT_RG_CENTER) ) {
2009 stop = vector->getFirstStop();
2010 } else {
2011 stop = sp_last_stop(vector);
2012 }
2013 if (stop) {
2014 StructStopInfo *stopinfo = new StructStopInfo;
2015 stopinfo->spstop = stop;
2016 stopinfo->draggable = draggable;
2017 stopinfo->gradient = gradient;
2018 stopinfo->vector = vector;
2019 // check if already present in list. (e.g. when both R1 and R2 were selected)
2020 bool present = false;
2021 for (GSList const * l = endstoplist; l != NULL; l = l->next) {
2022 if ( ((StructStopInfo*)l->data)->spstop == stopinfo->spstop ) {
2023 present = true;
2024 break; // no need to search further.
2025 }
2026 }
2027 if (!present)
2028 endstoplist = g_slist_append(endstoplist, stopinfo);
2029 }
2030 }
2031 break;
2032 default:
2033 break;
2034 }
2035 }
2036 selected = g_list_remove(selected, dragger);
2037 if ( just_one ) break; // iterate once if just_one is set.
2038 }
2039 while (midstoplist) {
2040 SPStop *stop = (SPStop*) midstoplist->data;
2041 document = SP_OBJECT_DOCUMENT (stop);
2042 Inkscape::XML::Node * parent = SP_OBJECT_REPR(stop)->parent();
2043 parent->removeChild(SP_OBJECT_REPR(stop));
2044 midstoplist = g_slist_remove(midstoplist, stop);
2045 }
2046 while (endstoplist) {
2047 StructStopInfo *stopinfo = (StructStopInfo*) endstoplist->data;
2048 document = SP_OBJECT_DOCUMENT (stopinfo->spstop);
2050 // 2 is the minimum, cannot delete more than that without deleting the whole vector
2051 // cannot use vector->vector.stops.size() because the vector might be invalidated by deletion of a midstop
2052 // manually count the children, don't know if there already exists a function for this...
2053 int len = 0;
2054 for ( SPObject *child = (stopinfo->vector)->firstChild() ; child ; child = child->getNext() )
2055 {
2056 if ( SP_IS_STOP(child) ) {
2057 len ++;
2058 }
2059 }
2060 if (len > 2)
2061 {
2062 switch (stopinfo->draggable->point_type) {
2063 case POINT_LG_BEGIN:
2064 {
2065 SP_OBJECT_REPR(stopinfo->vector)->removeChild(SP_OBJECT_REPR(stopinfo->spstop));
2067 SPLinearGradient *lg = SP_LINEARGRADIENT(stopinfo->gradient);
2068 Geom::Point oldbegin = Geom::Point (lg->x1.computed, lg->y1.computed);
2069 Geom::Point end = Geom::Point (lg->x2.computed, lg->y2.computed);
2070 SPStop *stop = stopinfo->vector->getFirstStop();
2071 gdouble offset = stop->offset;
2072 Geom::Point newbegin = oldbegin + offset * (end - oldbegin);
2073 lg->x1.computed = newbegin[Geom::X];
2074 lg->y1.computed = newbegin[Geom::Y];
2076 Inkscape::XML::Node *repr = SP_OBJECT_REPR(stopinfo->gradient);
2077 sp_repr_set_svg_double(repr, "x1", lg->x1.computed);
2078 sp_repr_set_svg_double(repr, "y1", lg->y1.computed);
2079 stop->offset = 0;
2080 sp_repr_set_css_double (SP_OBJECT_REPR (stop), "offset", 0);
2082 // iterate through midstops to set new offset values such that they won't move on canvas.
2083 SPStop *laststop = sp_last_stop(stopinfo->vector);
2084 stop = stop->getNextStop();
2085 while ( stop != laststop ) {
2086 stop->offset = (stop->offset - offset)/(1 - offset);
2087 sp_repr_set_css_double (SP_OBJECT_REPR (stop), "offset", stop->offset);
2088 stop = stop->getNextStop();
2089 }
2090 }
2091 break;
2092 case POINT_LG_END:
2093 {
2094 SP_OBJECT_REPR(stopinfo->vector)->removeChild(SP_OBJECT_REPR(stopinfo->spstop));
2096 SPLinearGradient *lg = SP_LINEARGRADIENT(stopinfo->gradient);
2097 Geom::Point begin = Geom::Point (lg->x1.computed, lg->y1.computed);
2098 Geom::Point oldend = Geom::Point (lg->x2.computed, lg->y2.computed);
2099 SPStop *laststop = sp_last_stop(stopinfo->vector);
2100 gdouble offset = laststop->offset;
2101 Geom::Point newend = begin + offset * (oldend - begin);
2102 lg->x2.computed = newend[Geom::X];
2103 lg->y2.computed = newend[Geom::Y];
2105 Inkscape::XML::Node *repr = SP_OBJECT_REPR(stopinfo->gradient);
2106 sp_repr_set_svg_double(repr, "x2", lg->x2.computed);
2107 sp_repr_set_svg_double(repr, "y2", lg->y2.computed);
2108 laststop->offset = 1;
2109 sp_repr_set_css_double (SP_OBJECT_REPR (laststop), "offset", 1);
2111 // iterate through midstops to set new offset values such that they won't move on canvas.
2112 SPStop *stop = stopinfo->vector->getFirstStop();
2113 stop = stop->getNextStop();
2114 while ( stop != laststop ) {
2115 stop->offset = stop->offset / offset;
2116 sp_repr_set_css_double (SP_OBJECT_REPR (stop), "offset", stop->offset);
2117 stop = stop->getNextStop();
2118 }
2119 }
2120 break;
2121 case POINT_RG_CENTER:
2122 {
2123 SPStop *newfirst = stopinfo->spstop->getNextStop();
2124 if (newfirst) {
2125 newfirst->offset = 0;
2126 sp_repr_set_css_double (SP_OBJECT_REPR (newfirst), "offset", 0);
2127 }
2128 SP_OBJECT_REPR(stopinfo->vector)->removeChild(SP_OBJECT_REPR(stopinfo->spstop));
2129 }
2130 break;
2131 case POINT_RG_R1:
2132 case POINT_RG_R2:
2133 SP_OBJECT_REPR(stopinfo->vector)->removeChild(SP_OBJECT_REPR(stopinfo->spstop));
2135 SPRadialGradient *rg = SP_RADIALGRADIENT(stopinfo->gradient);
2136 double oldradius = rg->r.computed;
2137 SPStop *laststop = sp_last_stop(stopinfo->vector);
2138 gdouble offset = laststop->offset;
2139 double newradius = offset * oldradius;
2140 rg->r.computed = newradius;
2142 Inkscape::XML::Node *repr = SP_OBJECT_REPR(rg);
2143 sp_repr_set_svg_double(repr, "r", rg->r.computed);
2144 laststop->offset = 1;
2145 sp_repr_set_css_double (SP_OBJECT_REPR (laststop), "offset", 1);
2147 // iterate through midstops to set new offset values such that they won't move on canvas.
2148 SPStop *stop = stopinfo->vector->getFirstStop();
2149 stop = stop->getNextStop();
2150 while ( stop != laststop ) {
2151 stop->offset = stop->offset / offset;
2152 sp_repr_set_css_double (SP_OBJECT_REPR (stop), "offset", stop->offset);
2153 stop = stop->getNextStop();
2154 }
2155 break;
2156 }
2157 }
2158 else
2159 { // delete the gradient from the object. set fill to unset FIXME: set to fill of unselected node?
2160 SPCSSAttr *css = sp_repr_css_attr_new ();
2162 // stopinfo->spstop is the selected stop
2163 Inkscape::XML::Node *unselectedrepr = SP_OBJECT_REPR(stopinfo->vector)->firstChild();
2164 if (unselectedrepr == SP_OBJECT_REPR(stopinfo->spstop) ) {
2165 unselectedrepr = unselectedrepr->next();
2166 }
2168 if (unselectedrepr == NULL) {
2169 if (stopinfo->draggable->fill_or_stroke) {
2170 sp_repr_css_unset_property (css, "fill");
2171 } else {
2172 sp_repr_css_unset_property (css, "stroke");
2173 }
2174 } else {
2175 SPCSSAttr *stopcss = sp_repr_css_attr(unselectedrepr, "style");
2176 if (stopinfo->draggable->fill_or_stroke) {
2177 sp_repr_css_set_property(css, "fill", sp_repr_css_property(stopcss, "stop-color", "inkscape:unset"));
2178 sp_repr_css_set_property(css, "fill-opacity", sp_repr_css_property(stopcss, "stop-opacity", "1"));
2179 } else {
2180 sp_repr_css_set_property(css, "stroke", sp_repr_css_property(stopcss, "stop-color", "inkscape:unset"));
2181 sp_repr_css_set_property(css, "stroke-opacity", sp_repr_css_property(stopcss, "stop-opacity", "1"));
2182 }
2183 sp_repr_css_attr_unref (stopcss);
2184 }
2186 sp_repr_css_change (SP_OBJECT_REPR (stopinfo->draggable->item), css, "style");
2187 sp_repr_css_attr_unref (css);
2188 }
2190 endstoplist = g_slist_remove(endstoplist, stopinfo);
2191 delete stopinfo;
2192 }
2194 if (document) {
2195 DocumentUndo::done( document, SP_VERB_CONTEXT_GRADIENT, _("Delete gradient stop(s)") );
2196 }
2197 }
2200 /*
2201 Local Variables:
2202 mode:c++
2203 c-file-style:"stroustrup"
2204 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
2205 indent-tabs-mode:nil
2206 fill-column:99
2207 End:
2208 */
2209 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4 :