1 #define __SP_GRADIENT_CONTEXT_C__
3 /*
4 * Gradient drawing and editing tool
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
21 #include <gdk/gdkkeysyms.h>
23 #include "macros.h"
24 #include "document.h"
25 #include "selection.h"
26 #include "desktop.h"
27 #include "desktop-handles.h"
28 #include "message-context.h"
29 #include "message-stack.h"
30 #include "pixmaps/cursor-gradient.xpm"
31 #include "pixmaps/cursor-gradient-add.xpm"
32 #include "gradient-context.h"
33 #include "gradient-chemistry.h"
34 #include <glibmm/i18n.h>
35 #include "prefs-utils.h"
36 #include "gradient-drag.h"
37 #include "gradient-chemistry.h"
38 #include "xml/repr.h"
39 #include "sp-item.h"
40 #include "display/sp-ctrlline.h"
41 #include "sp-linear-gradient.h"
42 #include "sp-radial-gradient.h"
43 #include "sp-stop.h"
44 #include "svg/css-ostringstream.h"
45 #include "svg/svg-color.h"
46 #include "snap.h"
47 #include "sp-namedview.h"
48 #include "rubberband.h"
52 static void sp_gradient_context_class_init(SPGradientContextClass *klass);
53 static void sp_gradient_context_init(SPGradientContext *gr_context);
54 static void sp_gradient_context_dispose(GObject *object);
56 static void sp_gradient_context_setup(SPEventContext *ec);
58 static gint sp_gradient_context_root_handler(SPEventContext *event_context, GdkEvent *event);
60 static void sp_gradient_drag(SPGradientContext &rc, NR::Point const pt, guint state, guint32 etime);
62 static SPEventContextClass *parent_class;
65 GtkType sp_gradient_context_get_type()
66 {
67 static GType type = 0;
68 if (!type) {
69 GTypeInfo info = {
70 sizeof(SPGradientContextClass),
71 NULL, NULL,
72 (GClassInitFunc) sp_gradient_context_class_init,
73 NULL, NULL,
74 sizeof(SPGradientContext),
75 4,
76 (GInstanceInitFunc) sp_gradient_context_init,
77 NULL, /* value_table */
78 };
79 type = g_type_register_static(SP_TYPE_EVENT_CONTEXT, "SPGradientContext", &info, (GTypeFlags) 0);
80 }
81 return type;
82 }
84 static void sp_gradient_context_class_init(SPGradientContextClass *klass)
85 {
86 GObjectClass *object_class = (GObjectClass *) klass;
87 SPEventContextClass *event_context_class = (SPEventContextClass *) klass;
89 parent_class = (SPEventContextClass *) g_type_class_peek_parent(klass);
91 object_class->dispose = sp_gradient_context_dispose;
93 event_context_class->setup = sp_gradient_context_setup;
94 event_context_class->root_handler = sp_gradient_context_root_handler;
95 }
97 static void sp_gradient_context_init(SPGradientContext *gr_context)
98 {
99 SPEventContext *event_context = SP_EVENT_CONTEXT(gr_context);
101 gr_context->cursor_addnode = false;
102 event_context->cursor_shape = cursor_gradient_xpm;
103 event_context->hot_x = 4;
104 event_context->hot_y = 4;
105 event_context->xp = 0;
106 event_context->yp = 0;
107 event_context->tolerance = 6;
108 event_context->within_tolerance = false;
109 event_context->item_to_select = NULL;
110 }
112 static void sp_gradient_context_dispose(GObject *object)
113 {
114 SPGradientContext *rc = SP_GRADIENT_CONTEXT(object);
115 SPEventContext *ec = SP_EVENT_CONTEXT(object);
117 ec->enableGrDrag(false);
119 if (rc->_message_context) {
120 delete rc->_message_context;
121 }
123 rc->selcon->disconnect();
124 delete rc->selcon;
125 rc->subselcon->disconnect();
126 delete rc->subselcon;
128 G_OBJECT_CLASS(parent_class)->dispose(object);
129 }
131 const gchar *gr_handle_descr [] = {
132 N_("Linear gradient <b>start</b>"), //POINT_LG_BEGIN
133 N_("Linear gradient <b>end</b>"),
134 N_("Linear gradient <b>mid stop</b>"),
135 N_("Radial gradient <b>center</b>"),
136 N_("Radial gradient <b>radius</b>"),
137 N_("Radial gradient <b>radius</b>"),
138 N_("Radial gradient <b>focus</b>"), // POINT_RG_FOCUS
139 N_("Radial gradient <b>mid stop</b>"),
140 N_("Radial gradient <b>mid stop</b>")
141 };
143 static void
144 gradient_selection_changed (Inkscape::Selection *, gpointer data)
145 {
146 SPGradientContext *rc = (SPGradientContext *) data;
148 GrDrag *drag = rc->_grdrag;
149 Inkscape::Selection *selection = sp_desktop_selection(SP_EVENT_CONTEXT(rc)->desktop);
150 guint n_obj = g_slist_length((GSList *) selection->itemList());
152 if (!drag->isNonEmpty() || selection->isEmpty())
153 return;
154 guint n_tot = drag->numDraggers();
155 guint n_sel = drag->numSelected();
157 if (n_sel == 1) {
158 if (drag->singleSelectedDraggerNumDraggables() == 1) {
159 rc->_message_context->setF(Inkscape::NORMAL_MESSAGE,
160 _("%s selected out of %d gradient handles on %d selected object(s)"), gr_handle_descr[drag->singleSelectedDraggerSingleDraggableType()], n_tot, n_obj);
161 } else {
162 rc->_message_context->setF(Inkscape::NORMAL_MESSAGE,
163 _("One handle merging %d stops (drag with <b>Shift</b> to separate) selected out of %d gradient handles on %d selected object(s)"), drag->singleSelectedDraggerNumDraggables(), n_tot, n_obj);
164 }
165 } else if (n_sel > 1) {
166 rc->_message_context->setF(Inkscape::NORMAL_MESSAGE,
167 _("<b>%d</b> gradient handles selected out of %d on %d selected object(s)"), n_sel, n_tot, n_obj);
168 } else if (n_sel == 0) {
169 rc->_message_context->setF(Inkscape::NORMAL_MESSAGE,
170 _("<b>No</b> gradient handles selected out of %d on %d selected object(s)"), n_tot, n_obj);
171 }
172 }
174 static void
175 gradient_subselection_changed (gpointer, gpointer data)
176 {
177 gradient_selection_changed (NULL, data);
178 }
181 static void sp_gradient_context_setup(SPEventContext *ec)
182 {
183 SPGradientContext *rc = SP_GRADIENT_CONTEXT(ec);
185 if (((SPEventContextClass *) parent_class)->setup) {
186 ((SPEventContextClass *) parent_class)->setup(ec);
187 }
189 if (prefs_get_int_attribute("tools.gradient", "selcue", 1) != 0) {
190 ec->enableSelectionCue();
191 }
193 ec->enableGrDrag();
194 Inkscape::Selection *selection = sp_desktop_selection(ec->desktop);
196 rc->_message_context = new Inkscape::MessageContext(sp_desktop_message_stack(ec->desktop));
198 rc->selcon = new sigc::connection (selection->connectChanged( sigc::bind (sigc::ptr_fun(&gradient_selection_changed), rc)));
199 rc->subselcon = new sigc::connection (ec->desktop->connectToolSubselectionChanged(sigc::bind (sigc::ptr_fun(&gradient_subselection_changed), rc)));
200 gradient_selection_changed(selection, rc);
201 }
203 void
204 sp_gradient_context_select_next (SPEventContext *event_context)
205 {
206 GrDrag *drag = event_context->_grdrag;
207 g_assert (drag);
209 GrDragger *d = drag->select_next();
211 event_context->desktop->scroll_to_point(&(d->point), 1.0);
212 }
214 void
215 sp_gradient_context_select_prev (SPEventContext *event_context)
216 {
217 GrDrag *drag = event_context->_grdrag;
218 g_assert (drag);
220 GrDragger *d = drag->select_prev();
222 event_context->desktop->scroll_to_point(&(d->point), 1.0);
223 }
225 static bool
226 sp_gradient_context_is_over_line (SPGradientContext *rc, SPItem *item, NR::Point event_p)
227 {
228 SPDesktop *desktop = SP_EVENT_CONTEXT (rc)->desktop;
230 //Translate mouse point into proper coord system
231 rc->mousepoint_doc = desktop->w2d(event_p);
233 SPCtrlLine* line = SP_CTRLLINE(item);
235 NR::Point nearest = snap_vector_midpoint (rc->mousepoint_doc, line->s, line->e, 0);
236 double dist_screen = NR::L2 (rc->mousepoint_doc - nearest) * desktop->current_zoom();
238 double tolerance = (double) SP_EVENT_CONTEXT(rc)->tolerance;
240 bool close = (dist_screen < tolerance);
242 return close;
243 }
245 std::vector<NR::Point>
246 sp_gradient_context_get_stop_intervals (GrDrag *drag, GSList **these_stops, GSList **next_stops)
247 {
248 std::vector<NR::Point> coords;
250 // for all selected draggers
251 for (GList *i = drag->selected; i != NULL; i = i->next) {
252 GrDragger *dragger = (GrDragger *) i->data;
253 // remember the coord of the dragger to reselect it later
254 coords.push_back(dragger->point);
255 // for all draggables of dragger
256 for (GSList const* j = dragger->draggables; j != NULL; j = j->next) {
257 GrDraggable *d = (GrDraggable *) j->data;
259 // find the gradient
260 SPGradient *gradient = sp_item_gradient (d->item, d->fill_or_stroke);
261 SPGradient *vector = sp_gradient_get_forked_vector_if_necessary (gradient, false);
263 // these draggable types cannot have a next draggabe to insert a stop between them
264 if (d->point_type == POINT_LG_END ||
265 d->point_type == POINT_RG_FOCUS ||
266 d->point_type == POINT_RG_R1 ||
267 d->point_type == POINT_RG_R2) {
268 continue;
269 }
271 // from draggables to stops
272 SPStop *this_stop = sp_get_stop_i (vector, d->point_i);
273 SPStop *next_stop = sp_next_stop (this_stop);
274 SPStop *last_stop = sp_last_stop (vector);
276 gint fs = d->fill_or_stroke;
277 SPItem *item = d->item;
278 gint type = d->point_type;
279 gint p_i = d->point_i;
281 // if there's a next stop,
282 if (next_stop) {
283 GrDragger *dnext = NULL;
284 // find its dragger
285 // (complex because it may have different types, and because in radial,
286 // more than one dragger may correspond to a stop, so we must distinguish)
287 if (type == POINT_LG_BEGIN || type == POINT_LG_MID) {
288 if (next_stop == last_stop)
289 dnext = drag->getDraggerFor (item, POINT_LG_END, p_i+1, fs);
290 else
291 dnext = drag->getDraggerFor (item, POINT_LG_MID, p_i+1, fs);
292 } else { // radial
293 if (type == POINT_RG_CENTER || type == POINT_RG_MID1) {
294 if (next_stop == last_stop)
295 dnext = drag->getDraggerFor (item, POINT_RG_R1, p_i+1, fs);
296 else
297 dnext = drag->getDraggerFor (item, POINT_RG_MID1, p_i+1, fs);
298 }
299 if ((type == POINT_RG_MID2) ||
300 (type == POINT_RG_CENTER && dnext && !dnext->isSelected())) {
301 if (next_stop == last_stop)
302 dnext = drag->getDraggerFor (item, POINT_RG_R2, p_i+1, fs);
303 else
304 dnext = drag->getDraggerFor (item, POINT_RG_MID2, p_i+1, fs);
305 }
306 }
308 // if both adjacent draggers selected,
309 if (!g_slist_find(*these_stops, this_stop) && dnext && dnext->isSelected()) {
311 // remember the coords of the future dragger to select it
312 coords.push_back(0.5*(dragger->point + dnext->point));
314 // do not insert a stop now, it will confuse the loop;
315 // just remember the stops
316 *these_stops = g_slist_prepend (*these_stops, this_stop);
317 *next_stops = g_slist_prepend (*next_stops, next_stop);
318 }
319 }
320 }
321 }
322 return coords;
323 }
325 static void
326 sp_gradient_context_add_stops_between_selected_stops (SPGradientContext *rc)
327 {
328 SPDocument *doc = NULL;
329 GrDrag *drag = rc->_grdrag;
331 GSList *these_stops = NULL;
332 GSList *next_stops = NULL;
334 std::vector<NR::Point> coords = sp_gradient_context_get_stop_intervals (drag, &these_stops, &next_stops);
336 if (g_slist_length(these_stops) == 0 && drag->numSelected() == 1) {
337 // if a single stop is selected, add between that stop and the next one
338 GrDragger *dragger = (GrDragger *) drag->selected->data;
339 for (GSList const* j = dragger->draggables; j != NULL; j = j->next) {
340 GrDraggable *d = (GrDraggable *) j->data;
341 SPGradient *gradient = sp_item_gradient (d->item, d->fill_or_stroke);
342 SPGradient *vector = sp_gradient_get_forked_vector_if_necessary (gradient, false);
343 SPStop *this_stop = sp_get_stop_i (vector, d->point_i);
344 SPStop *next_stop = sp_next_stop (this_stop);
345 if (this_stop && next_stop) {
346 these_stops = g_slist_prepend (these_stops, this_stop);
347 next_stops = g_slist_prepend (next_stops, next_stop);
348 }
349 }
350 }
352 // now actually create the new stops
353 GSList *i = these_stops;
354 GSList *j = next_stops;
355 for (; i != NULL && j != NULL; i = i->next, j = j->next) {
356 SPStop *this_stop = (SPStop *) i->data;
357 SPStop *next_stop = (SPStop *) j->data;
358 gfloat offset = 0.5*(this_stop->offset + next_stop->offset);
359 SPObject *parent = SP_OBJECT_PARENT(this_stop);
360 if (SP_IS_GRADIENT (parent)) {
361 doc = SP_OBJECT_DOCUMENT (parent);
362 sp_vector_add_stop (SP_GRADIENT (parent), this_stop, next_stop, offset);
363 sp_gradient_ensure_vector (SP_GRADIENT (parent));
364 }
365 }
367 if (g_slist_length(these_stops) > 0 && doc) {
368 sp_document_done (doc, SP_VERB_CONTEXT_GRADIENT, _("Add gradient stop"));
369 drag->updateDraggers();
370 // so that it does not automatically update draggers in idle loop, as this would deselect
371 drag->local_change = true;
372 // select all the old selected and new created draggers
373 drag->selectByCoords(coords);
374 }
376 g_slist_free (these_stops);
377 g_slist_free (next_stops);
378 }
380 double sqr(double x) {return x*x;}
382 static void
383 sp_gradient_simplify(SPGradientContext *rc, double tolerance)
384 {
385 SPDocument *doc = NULL;
386 GrDrag *drag = rc->_grdrag;
388 GSList *these_stops = NULL;
389 GSList *next_stops = NULL;
391 std::vector<NR::Point> coords = sp_gradient_context_get_stop_intervals (drag, &these_stops, &next_stops);
393 GSList *todel = NULL;
395 GSList *i = these_stops;
396 GSList *j = next_stops;
397 for (; i != NULL && j != NULL; i = i->next, j = j->next) {
398 SPStop *stop0 = (SPStop *) i->data;
399 SPStop *stop1 = (SPStop *) j->data;
401 gint i1 = g_slist_index(these_stops, stop1);
402 if (i1 != -1) {
403 GSList *next_next = g_slist_nth (next_stops, i1);
404 if (next_next) {
405 SPStop *stop2 = (SPStop *) next_next->data;
407 if (g_slist_find(todel, stop0) || g_slist_find(todel, stop2))
408 continue;
410 guint32 const c0 = sp_stop_get_rgba32(stop0);
411 guint32 const c2 = sp_stop_get_rgba32(stop2);
412 guint32 const c1r = sp_stop_get_rgba32(stop1);
413 guint32 c1 = average_color (c0, c2,
414 (stop1->offset - stop0->offset) / (stop2->offset - stop0->offset));
416 double diff =
417 sqr(SP_RGBA32_R_F(c1) - SP_RGBA32_R_F(c1r)) +
418 sqr(SP_RGBA32_G_F(c1) - SP_RGBA32_G_F(c1r)) +
419 sqr(SP_RGBA32_B_F(c1) - SP_RGBA32_B_F(c1r)) +
420 sqr(SP_RGBA32_A_F(c1) - SP_RGBA32_A_F(c1r));
422 if (diff < tolerance)
423 todel = g_slist_prepend (todel, stop1);
424 }
425 }
426 }
428 for (i = todel; i != NULL; i = i->next) {
429 SPStop *stop = (SPStop*) i->data;
430 doc = SP_OBJECT_DOCUMENT (stop);
431 Inkscape::XML::Node * parent = SP_OBJECT_REPR(stop)->parent();
432 parent->removeChild(SP_OBJECT_REPR(stop));
433 }
435 if (g_slist_length(todel) > 0) {
436 sp_document_done (doc, SP_VERB_CONTEXT_GRADIENT, _("Simplify gradient"));
437 drag->local_change = true;
438 drag->updateDraggers();
439 drag->selectByCoords(coords);
440 }
442 g_slist_free (todel);
443 g_slist_free (these_stops);
444 g_slist_free (next_stops);
445 }
448 static void
449 sp_gradient_context_add_stop_near_point (SPGradientContext *rc, SPItem *item, NR::Point mouse_p, guint32 /*etime*/)
450 {
451 // item is the selected item. mouse_p the location in doc coordinates of where to add the stop
453 SPEventContext *ec = SP_EVENT_CONTEXT(rc);
454 SPDesktop *desktop = SP_EVENT_CONTEXT (rc)->desktop;
456 double tolerance = (double) ec->tolerance;
458 ec->get_drag()->addStopNearPoint (item, mouse_p, tolerance/desktop->current_zoom());
460 sp_document_done (sp_desktop_document (desktop), SP_VERB_CONTEXT_GRADIENT,
461 _("Add gradient stop"));
463 ec->get_drag()->updateDraggers();
464 }
467 static gint
468 sp_gradient_context_root_handler(SPEventContext *event_context, GdkEvent *event)
469 {
470 static bool dragging;
472 SPDesktop *desktop = event_context->desktop;
473 Inkscape::Selection *selection = sp_desktop_selection (desktop);
475 SPGradientContext *rc = SP_GRADIENT_CONTEXT(event_context);
477 event_context->tolerance = prefs_get_int_attribute_limited("options.dragtolerance", "value", 0, 0, 100);
478 double const nudge = prefs_get_double_attribute_limited("options.nudgedistance", "value", 2, 0, 1000); // in px
480 GrDrag *drag = event_context->_grdrag;
481 g_assert (drag);
483 gint ret = FALSE;
484 switch (event->type) {
485 case GDK_2BUTTON_PRESS:
486 if ( event->button.button == 1 ) {
487 bool over_line = false;
488 SPCtrlLine *line = NULL;
489 if (drag->lines) {
490 for (GSList *l = drag->lines; (l != NULL) && (!over_line); l = l->next) {
491 line = (SPCtrlLine*) l->data;
492 over_line |= sp_gradient_context_is_over_line (rc, (SPItem*) line, NR::Point(event->motion.x, event->motion.y));
493 }
494 }
495 if (over_line) {
496 // we take the first item in selection, because with doubleclick, the first click
497 // always resets selection to the single object under cursor
498 sp_gradient_context_add_stop_near_point(rc, SP_ITEM(selection->itemList()->data), rc->mousepoint_doc, event->button.time);
499 } else {
500 for (GSList const* i = selection->itemList(); i != NULL; i = i->next) {
501 SPItem *item = SP_ITEM(i->data);
502 SPGradientType new_type = (SPGradientType) prefs_get_int_attribute ("tools.gradient", "newgradient", SP_GRADIENT_TYPE_LINEAR);
503 guint new_fill = prefs_get_int_attribute ("tools.gradient", "newfillorstroke", 1);
505 SPGradient *vector = sp_gradient_vector_for_object(sp_desktop_document(desktop), desktop, SP_OBJECT (item), new_fill);
507 SPGradient *priv = sp_item_set_gradient(item, vector, new_type, new_fill);
508 sp_gradient_reset_to_userspace(priv, item);
509 }
511 sp_document_done (sp_desktop_document (desktop), SP_VERB_CONTEXT_GRADIENT,
512 _("Create default gradient"));
513 }
514 ret = TRUE;
515 }
516 break;
517 case GDK_BUTTON_PRESS:
518 if ( event->button.button == 1 && !event_context->space_panning ) {
519 NR::Point const button_w(event->button.x, event->button.y);
521 // save drag origin
522 event_context->xp = (gint) button_w[NR::X];
523 event_context->yp = (gint) button_w[NR::Y];
524 event_context->within_tolerance = true;
526 dragging = true;
528 NR::Point const button_dt = desktop->w2d(button_w);
529 if (event->button.state & GDK_SHIFT_MASK) {
530 Inkscape::Rubberband::get()->start(desktop, button_dt);
531 } else {
532 // remember clicked item, disregarding groups, honoring Alt; do nothing with Crtl to
533 // enable Ctrl+doubleclick of exactly the selected item(s)
534 if (!(event->button.state & GDK_CONTROL_MASK))
535 event_context->item_to_select = sp_event_context_find_item (desktop, button_w, event->button.state & GDK_MOD1_MASK, TRUE);
537 /* Snap center to nearest magnetic point */
538 SnapManager const &m = desktop->namedview->snap_manager;
539 rc->origin = m.freeSnap(Inkscape::Snapper::SNAPPOINT_NODE, button_dt, NULL).getPoint();
540 }
542 ret = TRUE;
543 }
544 break;
545 case GDK_MOTION_NOTIFY:
546 if ( dragging
547 && ( event->motion.state & GDK_BUTTON1_MASK ) && !event_context->space_panning )
548 {
549 if ( event_context->within_tolerance
550 && ( abs( (gint) event->motion.x - event_context->xp ) < event_context->tolerance )
551 && ( abs( (gint) event->motion.y - event_context->yp ) < event_context->tolerance ) ) {
552 break; // do not drag if we're within tolerance from origin
553 }
554 // Once the user has moved farther than tolerance from the original location
555 // (indicating they intend to draw, not click), then always process the
556 // motion notify coordinates as given (no snapping back to origin)
557 event_context->within_tolerance = false;
559 NR::Point const motion_w(event->motion.x,
560 event->motion.y);
561 NR::Point const motion_dt = event_context->desktop->w2d(motion_w);
563 if (Inkscape::Rubberband::get()->is_started()) {
564 Inkscape::Rubberband::get()->move(motion_dt);
565 event_context->defaultMessageContext()->set(Inkscape::NORMAL_MESSAGE, _("<b>Draw around</b> handles to select them"));
566 } else {
567 sp_gradient_drag(*rc, motion_dt, event->motion.state, event->motion.time);
568 }
569 gobble_motion_events(GDK_BUTTON1_MASK);
571 ret = TRUE;
572 } else {
573 bool over_line = false;
574 if (drag->lines) {
575 for (GSList *l = drag->lines; l != NULL; l = l->next) {
576 over_line |= sp_gradient_context_is_over_line (rc, (SPItem*) l->data, NR::Point(event->motion.x, event->motion.y));
577 }
578 }
580 if (rc->cursor_addnode && !over_line) {
581 event_context->cursor_shape = cursor_gradient_xpm;
582 sp_event_context_update_cursor(event_context);
583 rc->cursor_addnode = false;
584 } else if (!rc->cursor_addnode && over_line) {
585 event_context->cursor_shape = cursor_gradient_add_xpm;
586 sp_event_context_update_cursor(event_context);
587 rc->cursor_addnode = true;
588 }
589 }
590 break;
591 case GDK_BUTTON_RELEASE:
592 event_context->xp = event_context->yp = 0;
593 if ( event->button.button == 1 && !event_context->space_panning ) {
594 if ( (event->button.state & GDK_CONTROL_MASK) && (event->button.state & GDK_MOD1_MASK ) ) {
595 bool over_line = false;
596 SPCtrlLine *line = NULL;
597 if (drag->lines) {
598 for (GSList *l = drag->lines; (l != NULL) && (!over_line); l = l->next) {
599 line = (SPCtrlLine*) l->data;
600 over_line = sp_gradient_context_is_over_line (rc, (SPItem*) line, NR::Point(event->motion.x, event->motion.y));
601 if (over_line)
602 break;
603 }
604 }
605 if (over_line && line) {
606 sp_gradient_context_add_stop_near_point(rc, line->item, rc->mousepoint_doc, 0);
607 ret = TRUE;
608 }
609 } else {
610 dragging = false;
612 // unless clicked with Ctrl (to enable Ctrl+doubleclick).
613 if (event->button.state & GDK_CONTROL_MASK) {
614 ret = TRUE;
615 break;
616 }
618 if (!event_context->within_tolerance) {
619 // we've been dragging, either do nothing (grdrag handles that),
620 // or rubberband-select if we have rubberband
621 Inkscape::Rubberband::Rubberband *r = Inkscape::Rubberband::get();
622 if (r->is_started() && !event_context->within_tolerance) {
623 // this was a rubberband drag
624 if (r->getMode() == RUBBERBAND_MODE_RECT) {
625 NR::Maybe<NR::Rect> const b = r->getRectangle();
626 drag->selectRect(*b);
627 }
628 }
630 } else if (event_context->item_to_select) {
631 // no dragging, select clicked item if any
632 if (event->button.state & GDK_SHIFT_MASK) {
633 selection->toggle(event_context->item_to_select);
634 } else {
635 selection->set(event_context->item_to_select);
636 }
637 } else {
638 // click in an empty space; do the same as Esc
639 if (drag->selected) {
640 drag->deselectAll();
641 } else {
642 selection->clear();
643 }
644 }
646 event_context->item_to_select = NULL;
647 ret = TRUE;
648 }
649 Inkscape::Rubberband::get()->stop();
650 }
651 break;
652 case GDK_KEY_PRESS:
653 switch (get_group0_keyval (&event->key)) {
654 case GDK_Alt_L:
655 case GDK_Alt_R:
656 case GDK_Control_L:
657 case GDK_Control_R:
658 case GDK_Shift_L:
659 case GDK_Shift_R:
660 case GDK_Meta_L: // Meta is when you press Shift+Alt (at least on my machine)
661 case GDK_Meta_R:
662 sp_event_show_modifier_tip (event_context->defaultMessageContext(), event,
663 _("<b>Ctrl</b>: snap gradient angle"),
664 _("<b>Shift</b>: draw gradient around the starting point"),
665 NULL);
666 break;
668 case GDK_x:
669 case GDK_X:
670 if (MOD__ALT_ONLY) {
671 desktop->setToolboxFocusTo ("altx-grad");
672 ret = TRUE;
673 }
674 break;
676 case GDK_A:
677 case GDK_a:
678 if (MOD__CTRL_ONLY && drag->isNonEmpty()) {
679 drag->selectAll();
680 ret = TRUE;
681 }
682 break;
684 case GDK_L:
685 case GDK_l:
686 if (MOD__CTRL_ONLY && drag->isNonEmpty() && drag->hasSelection()) {
687 sp_gradient_simplify(rc, 1e-4);
688 ret = TRUE;
689 }
690 break;
692 case GDK_Escape:
693 if (drag->selected) {
694 drag->deselectAll();
695 } else {
696 selection->clear();
697 }
698 ret = TRUE;
699 //TODO: make dragging escapable by Esc
700 break;
702 case GDK_Left: // move handle left
703 case GDK_KP_Left:
704 case GDK_KP_4:
705 if (!MOD__CTRL) { // not ctrl
706 gint mul = 1 + gobble_key_events(
707 get_group0_keyval(&event->key), 0); // with any mask
708 if (MOD__ALT) { // alt
709 if (MOD__SHIFT) drag->selected_move_screen(mul*-10, 0); // shift
710 else drag->selected_move_screen(mul*-1, 0); // no shift
711 }
712 else { // no alt
713 if (MOD__SHIFT) drag->selected_move(mul*-10*nudge, 0); // shift
714 else drag->selected_move(mul*-nudge, 0); // no shift
715 }
716 ret = TRUE;
717 }
718 break;
719 case GDK_Up: // move handle up
720 case GDK_KP_Up:
721 case GDK_KP_8:
722 if (!MOD__CTRL) { // not ctrl
723 gint mul = 1 + gobble_key_events(
724 get_group0_keyval(&event->key), 0); // with any mask
725 if (MOD__ALT) { // alt
726 if (MOD__SHIFT) drag->selected_move_screen(0, mul*10); // shift
727 else drag->selected_move_screen(0, mul*1); // no shift
728 }
729 else { // no alt
730 if (MOD__SHIFT) drag->selected_move(0, mul*10*nudge); // shift
731 else drag->selected_move(0, mul*nudge); // no shift
732 }
733 ret = TRUE;
734 }
735 break;
736 case GDK_Right: // move handle right
737 case GDK_KP_Right:
738 case GDK_KP_6:
739 if (!MOD__CTRL) { // not ctrl
740 gint mul = 1 + gobble_key_events(
741 get_group0_keyval(&event->key), 0); // with any mask
742 if (MOD__ALT) { // alt
743 if (MOD__SHIFT) drag->selected_move_screen(mul*10, 0); // shift
744 else drag->selected_move_screen(mul*1, 0); // no shift
745 }
746 else { // no alt
747 if (MOD__SHIFT) drag->selected_move(mul*10*nudge, 0); // shift
748 else drag->selected_move(mul*nudge, 0); // no shift
749 }
750 ret = TRUE;
751 }
752 break;
753 case GDK_Down: // move handle down
754 case GDK_KP_Down:
755 case GDK_KP_2:
756 if (!MOD__CTRL) { // not ctrl
757 gint mul = 1 + gobble_key_events(
758 get_group0_keyval(&event->key), 0); // with any mask
759 if (MOD__ALT) { // alt
760 if (MOD__SHIFT) drag->selected_move_screen(0, mul*-10); // shift
761 else drag->selected_move_screen(0, mul*-1); // no shift
762 }
763 else { // no alt
764 if (MOD__SHIFT) drag->selected_move(0, mul*-10*nudge); // shift
765 else drag->selected_move(0, mul*-nudge); // no shift
766 }
767 ret = TRUE;
768 }
769 break;
770 case GDK_r:
771 case GDK_R:
772 if (MOD__SHIFT_ONLY) {
773 // First try selected dragger
774 if (drag && drag->selected) {
775 drag->selected_reverse_vector();
776 } else { // If no drag or no dragger selected, act on selection (both fill and stroke gradients)
777 for (GSList const* i = selection->itemList(); i != NULL; i = i->next) {
778 sp_item_gradient_reverse_vector (SP_ITEM(i->data), true);
779 sp_item_gradient_reverse_vector (SP_ITEM(i->data), false);
780 }
781 }
782 // we did an undoable action
783 sp_document_done (sp_desktop_document (desktop), SP_VERB_CONTEXT_GRADIENT,
784 _("Invert gradient"));
785 ret = TRUE;
786 }
787 break;
789 case GDK_Insert:
790 case GDK_KP_Insert:
791 // with any modifiers:
792 sp_gradient_context_add_stops_between_selected_stops (rc);
793 ret = TRUE;
794 break;
796 case GDK_Delete:
797 case GDK_KP_Delete:
798 case GDK_BackSpace:
799 if ( drag->selected ) {
800 drag->deleteSelected(MOD__CTRL_ONLY);
801 ret = TRUE;
802 }
803 break;
804 default:
805 break;
806 }
807 break;
808 case GDK_KEY_RELEASE:
809 switch (get_group0_keyval (&event->key)) {
810 case GDK_Alt_L:
811 case GDK_Alt_R:
812 case GDK_Control_L:
813 case GDK_Control_R:
814 case GDK_Shift_L:
815 case GDK_Shift_R:
816 case GDK_Meta_L: // Meta is when you press Shift+Alt
817 case GDK_Meta_R:
818 event_context->defaultMessageContext()->clear();
819 break;
820 default:
821 break;
822 }
823 break;
824 default:
825 break;
826 }
828 if (!ret) {
829 if (((SPEventContextClass *) parent_class)->root_handler) {
830 ret = ((SPEventContextClass *) parent_class)->root_handler(event_context, event);
831 }
832 }
834 return ret;
835 }
837 static void sp_gradient_drag(SPGradientContext &rc, NR::Point const pt, guint /*state*/, guint32 etime)
838 {
839 SPDesktop *desktop = SP_EVENT_CONTEXT(&rc)->desktop;
840 Inkscape::Selection *selection = sp_desktop_selection(desktop);
841 SPDocument *document = sp_desktop_document(desktop);
842 SPEventContext *ec = SP_EVENT_CONTEXT(&rc);
844 if (!selection->isEmpty()) {
845 int type = prefs_get_int_attribute ("tools.gradient", "newgradient", 1);
846 int fill_or_stroke = prefs_get_int_attribute ("tools.gradient", "newfillorstroke", 1);
848 SPGradient *vector;
849 if (ec->item_to_select) {
850 vector = sp_gradient_vector_for_object(document, desktop, ec->item_to_select, fill_or_stroke);
851 } else {
852 vector = sp_gradient_vector_for_object(document, desktop, SP_ITEM(selection->itemList()->data), fill_or_stroke);
853 }
855 // HACK: reset fill-opacity - that 0.75 is annoying; BUT remove this when we have an opacity slider for all tabs
856 SPCSSAttr *css = sp_repr_css_attr_new();
857 sp_repr_css_set_property(css, "fill-opacity", "1.0");
859 for (GSList const *i = selection->itemList(); i != NULL; i = i->next) {
861 //FIXME: see above
862 sp_repr_css_change_recursive(SP_OBJECT_REPR(i->data), css, "style");
864 sp_item_set_gradient(SP_ITEM(i->data), vector, (SPGradientType) type, fill_or_stroke);
866 if (type == SP_GRADIENT_TYPE_LINEAR) {
867 sp_item_gradient_set_coords (SP_ITEM(i->data), POINT_LG_BEGIN, 0, rc.origin, fill_or_stroke, true, false);
868 sp_item_gradient_set_coords (SP_ITEM(i->data), POINT_LG_END, 0, pt, fill_or_stroke, true, false);
869 } else if (type == SP_GRADIENT_TYPE_RADIAL) {
870 sp_item_gradient_set_coords (SP_ITEM(i->data), POINT_RG_CENTER, 0, rc.origin, fill_or_stroke, true, false);
871 sp_item_gradient_set_coords (SP_ITEM(i->data), POINT_RG_R1, 0, pt, fill_or_stroke, true, false);
872 }
873 SP_OBJECT (i->data)->requestModified(SP_OBJECT_MODIFIED_FLAG);
874 }
875 if (ec->_grdrag) {
876 ec->_grdrag->updateDraggers();
877 // prevent regenerating draggers by selection modified signal, which sometimes
878 // comes too late and thus destroys the knot which we will now grab:
879 ec->_grdrag->local_change = true;
880 // give the grab out-of-bounds values of xp/yp because we're already dragging
881 // and therefore are already out of tolerance
882 ec->_grdrag->grabKnot (SP_ITEM(selection->itemList()->data),
883 type == SP_GRADIENT_TYPE_LINEAR? POINT_LG_END : POINT_RG_R1,
884 -1, // ignore number (though it is always 1)
885 fill_or_stroke, 99999, 99999, etime);
886 }
887 // We did an undoable action, but sp_document_done will be called by the knot when released
889 // status text; we do not track coords because this branch is run once, not all the time
890 // during drag
891 int n_objects = g_slist_length((GSList *) selection->itemList());
892 rc._message_context->setF(Inkscape::NORMAL_MESSAGE,
893 ngettext("<b>Gradient</b> for %d object; with <b>Ctrl</b> to snap angle",
894 "<b>Gradient</b> for %d objects; with <b>Ctrl</b> to snap angle", n_objects),
895 n_objects);
896 } else {
897 sp_desktop_message_stack(desktop)->flash(Inkscape::WARNING_MESSAGE, _("Select <b>objects</b> on which to create gradient."));
898 }
899 }
902 /*
903 Local Variables:
904 mode:c++
905 c-file-style:"stroustrup"
906 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
907 indent-tabs-mode:nil
908 fill-column:99
909 End:
910 */
911 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :