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 "pixmaps/cursor-gradient-delete.xpm"
33 #include "gradient-context.h"
34 #include "gradient-chemistry.h"
35 #include <glibmm/i18n.h>
36 #include "prefs-utils.h"
37 #include "gradient-drag.h"
38 #include "gradient-chemistry.h"
39 #include "xml/repr.h"
40 #include "sp-item.h"
41 #include "display/sp-ctrlline.h"
42 #include "sp-linear-gradient.h"
43 #include "sp-radial-gradient.h"
44 #include "sp-stop.h"
45 #include "svg/css-ostringstream.h"
46 #include "svg/svg-color.h"
51 static void sp_gradient_context_class_init(SPGradientContextClass *klass);
52 static void sp_gradient_context_init(SPGradientContext *gr_context);
53 static void sp_gradient_context_dispose(GObject *object);
55 static void sp_gradient_context_setup(SPEventContext *ec);
57 static gint sp_gradient_context_root_handler(SPEventContext *event_context, GdkEvent *event);
59 static void sp_gradient_drag(SPGradientContext &rc, NR::Point const pt, guint state, guint32 etime);
61 static SPEventContextClass *parent_class;
64 GtkType sp_gradient_context_get_type()
65 {
66 static GType type = 0;
67 if (!type) {
68 GTypeInfo info = {
69 sizeof(SPGradientContextClass),
70 NULL, NULL,
71 (GClassInitFunc) sp_gradient_context_class_init,
72 NULL, NULL,
73 sizeof(SPGradientContext),
74 4,
75 (GInstanceInitFunc) sp_gradient_context_init,
76 NULL, /* value_table */
77 };
78 type = g_type_register_static(SP_TYPE_EVENT_CONTEXT, "SPGradientContext", &info, (GTypeFlags) 0);
79 }
80 return type;
81 }
83 static void sp_gradient_context_class_init(SPGradientContextClass *klass)
84 {
85 GObjectClass *object_class = (GObjectClass *) klass;
86 SPEventContextClass *event_context_class = (SPEventContextClass *) klass;
88 parent_class = (SPEventContextClass *) g_type_class_peek_parent(klass);
90 object_class->dispose = sp_gradient_context_dispose;
92 event_context_class->setup = sp_gradient_context_setup;
93 event_context_class->root_handler = sp_gradient_context_root_handler;
94 }
96 static void sp_gradient_context_init(SPGradientContext *gr_context)
97 {
98 SPEventContext *event_context = SP_EVENT_CONTEXT(gr_context);
100 gr_context->cursor_addnode = false;
101 event_context->cursor_shape = cursor_gradient_xpm;
102 event_context->hot_x = 4;
103 event_context->hot_y = 4;
104 event_context->xp = 0;
105 event_context->yp = 0;
106 event_context->tolerance = 4;
107 event_context->within_tolerance = false;
108 event_context->item_to_select = NULL;
109 }
111 static void sp_gradient_context_dispose(GObject *object)
112 {
113 SPGradientContext *rc = SP_GRADIENT_CONTEXT(object);
114 SPEventContext *ec = SP_EVENT_CONTEXT(object);
116 ec->enableGrDrag(false);
118 if (rc->_message_context) {
119 delete rc->_message_context;
120 }
122 G_OBJECT_CLASS(parent_class)->dispose(object);
123 }
125 static void sp_gradient_context_setup(SPEventContext *ec)
126 {
127 SPGradientContext *rc = SP_GRADIENT_CONTEXT(ec);
129 if (((SPEventContextClass *) parent_class)->setup) {
130 ((SPEventContextClass *) parent_class)->setup(ec);
131 }
133 if (prefs_get_int_attribute("tools.gradient", "selcue", 1) != 0) {
134 ec->enableSelectionCue();
135 }
137 ec->enableGrDrag();
139 rc->_message_context = new Inkscape::MessageContext(sp_desktop_message_stack(ec->desktop));
140 }
142 void
143 sp_gradient_context_select_next (SPEventContext *event_context)
144 {
145 GrDrag *drag = event_context->_grdrag;
146 g_assert (drag);
148 drag->select_next();
149 }
151 void
152 sp_gradient_context_select_prev (SPEventContext *event_context)
153 {
154 GrDrag *drag = event_context->_grdrag;
155 g_assert (drag);
157 drag->select_prev();
158 }
160 // FIXME: make global function in libnr or somewhere.
161 static NR::Point
162 snap_vector_midpoint (NR::Point p, NR::Point begin, NR::Point end)
163 {
164 double length = NR::L2(end - begin);
165 NR::Point be = (end - begin) / length;
166 double r = NR::dot(p - begin, be);
168 if (r < 0.0) return begin;
169 if (r > length) return end;
171 return (begin + r * be);
172 }
174 static bool
175 sp_gradient_context_is_over_line (SPGradientContext *rc, SPItem *item, NR::Point event_p)
176 {
177 SPDesktop *desktop = SP_EVENT_CONTEXT (rc)->desktop;
179 //Translate mouse point into proper coord system
180 rc->mousepoint_doc = desktop->w2d(event_p);
182 SPCtrlLine* line = SP_CTRLLINE(item);
184 NR::Point nearest = snap_vector_midpoint (rc->mousepoint_doc, line->s, line->e);
185 NR::Point delta = rc->mousepoint_doc - nearest;
187 double tolerance = (double) SP_EVENT_CONTEXT(rc)->tolerance;
189 bool close = (NR::L2 (delta) < tolerance);
191 return close;
192 }
194 // Fixme : must be able to put this in a general file.
195 static guint32
196 average_color (guint32 c1, guint32 c2, gdouble p = 0.5)
197 {
198 guint32 r = (guint32) (SP_RGBA32_R_U (c1) * (1 - p) + SP_RGBA32_R_U (c2) * p);
199 guint32 g = (guint32) (SP_RGBA32_G_U (c1) * (1 - p) + SP_RGBA32_G_U (c2) * p);
200 guint32 b = (guint32) (SP_RGBA32_B_U (c1) * (1 - p) + SP_RGBA32_B_U (c2) * p);
201 guint32 a = (guint32) (SP_RGBA32_A_U (c1) * (1 - p) + SP_RGBA32_A_U (c2) * p);
203 return SP_RGBA32_U_COMPOSE (r, g, b, a);
204 }
206 static double
207 get_offset_between_points (NR::Point p, NR::Point begin, NR::Point end)
208 {
209 double length = NR::L2(end - begin);
210 NR::Point be = (end - begin) / length;
211 double r = NR::dot(p - begin, be);
213 if (r < 0.0) return 0.0;
214 if (r > length) return 1.0;
216 return (r / length);
217 }
219 static void
220 sp_gradient_context_add_stop_near_point (SPGradientContext *rc, SPItem *item, NR::Point mouse_p, guint32 etime)
221 {
222 // item is the selected item. mouse_p the location in doc coordinates of where to add the stop
224 SPEventContext *ec = SP_EVENT_CONTEXT(rc);
225 double tolerance = (double) ec->tolerance;
227 gfloat offset; // type of SPStop.offset = gfloat
228 SPGradient *gradient;
229 bool fill_or_stroke = true;
230 bool r1_knot = false;
232 bool addknot = false;
233 do {
234 gradient = sp_item_gradient (item, fill_or_stroke);
235 if (SP_IS_LINEARGRADIENT(gradient)) {
236 NR::Point begin = sp_item_gradient_get_coords(item, POINT_LG_BEGIN, 0, fill_or_stroke);
237 NR::Point end = sp_item_gradient_get_coords(item, POINT_LG_END, 0, fill_or_stroke);
239 NR::Point nearest = snap_vector_midpoint (mouse_p, begin, end);
240 NR::Point delta = mouse_p - nearest;
241 if ( NR::L2 (delta) < tolerance ) {
242 // add the knot
243 offset = get_offset_between_points(nearest, begin, end);
244 addknot = true;
245 break; // break out of the while loop: add only one knot
246 }
247 } else if (SP_IS_RADIALGRADIENT(gradient)) {
248 NR::Point begin = sp_item_gradient_get_coords(item, POINT_RG_CENTER, 0, fill_or_stroke);
249 NR::Point end = sp_item_gradient_get_coords(item, POINT_RG_R1, 0, fill_or_stroke);
250 NR::Point nearest = snap_vector_midpoint (mouse_p, begin, end);
251 NR::Point delta = mouse_p - nearest;
252 if ( NR::L2 (delta) < tolerance ) {
253 offset = get_offset_between_points(nearest, begin, end);
254 addknot = true;
255 r1_knot = true;
256 break; // break out of the while loop: add only one knot
257 }
259 end = sp_item_gradient_get_coords(item, POINT_RG_R2, 0, fill_or_stroke);
260 nearest = snap_vector_midpoint (mouse_p, begin, end);
261 delta = mouse_p - nearest;
262 if ( NR::L2 (delta) < tolerance ) {
263 offset = get_offset_between_points(nearest, begin, end);
264 addknot = true;
265 r1_knot = false;
266 break; // break out of the while loop: add only one knot
267 }
268 }
269 fill_or_stroke = !fill_or_stroke;
270 } while (!fill_or_stroke && !addknot) ;
272 if (addknot) {
273 SPGradient *vector = sp_gradient_get_vector (gradient, false);
274 SPStop* prev_stop = sp_first_stop(vector);
275 SPStop* next_stop = sp_next_stop(prev_stop);
276 while ( (next_stop) && (next_stop->offset < offset) ) {
277 prev_stop = next_stop;
278 next_stop = sp_next_stop(next_stop);
279 }
280 if (!next_stop) {
281 // logical error: the endstop should have offset 1 and should always be more than this offset here
282 return;
283 }
285 Inkscape::XML::Node *new_stop_repr = NULL;
286 new_stop_repr = SP_OBJECT_REPR(prev_stop)->duplicate();
287 SP_OBJECT_REPR(vector)->addChild(new_stop_repr, SP_OBJECT_REPR(prev_stop));
289 SPStop *newstop = (SPStop *) SP_OBJECT_DOCUMENT(vector)->getObjectByRepr(new_stop_repr);
290 newstop->offset = offset;
291 sp_repr_set_css_double( SP_OBJECT_REPR(newstop), "offset", (double)offset);
292 guint32 const c1 = sp_stop_get_rgba32(prev_stop);
293 guint32 const c2 = sp_stop_get_rgba32(next_stop);
294 guint32 cnew = average_color (c1, c2, (offset - prev_stop->offset) / (next_stop->offset - prev_stop->offset));
295 Inkscape::CSSOStringStream os;
296 gchar c[64];
297 sp_svg_write_color (c, 64, cnew);
298 gdouble opacity = (gdouble) SP_RGBA32_A_F (cnew);
299 os << "stop-color:" << c << ";stop-opacity:" << opacity <<";";
300 SP_OBJECT_REPR (newstop)->setAttribute("style", os.str().c_str());
303 Inkscape::GC::release(new_stop_repr);
304 sp_document_done (SP_OBJECT_DOCUMENT (vector), SP_VERB_CONTEXT_GRADIENT,
305 _("Add gradient stop"));
307 ec->_grdrag->updateDraggers();
308 sp_gradient_ensure_vector (gradient);
310 if (vector->has_stops) {
311 int i = 0;
312 for ( SPObject *ochild = sp_object_first_child (SP_OBJECT(vector)) ; ochild != NULL ; ochild = SP_OBJECT_NEXT(ochild) ) {
313 if (SP_IS_STOP (ochild)) {
314 if ( SP_STOP(ochild) == newstop ) {
315 break;
316 } else {
317 i++;
318 }
319 }
320 }
321 GrDragger *dragger = NULL;
322 gradient = sp_item_gradient (item, fill_or_stroke);
323 GrPointType pointtype;
324 if (SP_IS_LINEARGRADIENT(gradient)) {
325 dragger = SP_EVENT_CONTEXT(rc)->_grdrag->getDraggerFor (item, POINT_LG_MID, i, fill_or_stroke);
326 pointtype = POINT_LG_MID;
327 } else if (SP_IS_RADIALGRADIENT(gradient)) {
328 dragger = SP_EVENT_CONTEXT(rc)->_grdrag->getDraggerFor (item, r1_knot ? POINT_RG_MID1 : POINT_RG_MID2, i, fill_or_stroke);
329 pointtype = r1_knot ? POINT_RG_MID1 : POINT_RG_MID2;
330 }
331 if (dragger && (etime == 0) ) {
332 ec->_grdrag->setSelected (dragger);
333 } else {
334 ec->_grdrag->grabKnot (item,
335 pointtype,
336 i,
337 fill_or_stroke, 99999, 99999, etime);
338 }
339 ec->_grdrag->local_change = true;
341 }
342 }
343 }
345 static void
346 sp_gradient_context_delete_stops (SPGradientContext *rc, SPItem *item, GrDrag *drag, bool just_one) {
347 GrDragger *draggertemp = (GrDragger*) drag->selected->data;
348 GrDraggable *draggabletemp = (GrDraggable*) draggertemp->draggables->data;
349 SPGradient *gradient = sp_item_gradient (item, draggabletemp->fill_or_stroke);
350 SPGradient *vector = sp_gradient_get_vector (gradient, false);
352 // 2 is the minimum, cannot delete more than that without deleting the whole vector
353 guint num_delete = just_one ? 1 : g_list_length(drag->selected);
354 if (vector->vector.stops.size() >= (2+num_delete) ) {
355 GSList *stoplist = NULL;
356 while (drag->selected) {
357 GrDragger *dragger = (GrDragger*) drag->selected->data;
358 GrDraggable *draggable = (GrDraggable*) dragger->draggables->data;
359 SPStop *selstop = NULL;
360 switch (draggable->point_type) {
361 case POINT_LG_END:
362 case POINT_RG_R1:
363 case POINT_RG_R2:
364 selstop = sp_last_stop(vector);
365 break;
366 default:
367 selstop = sp_get_stop_i(vector, draggable->point_i);
368 break;
369 }
370 if ( !g_slist_find(stoplist, selstop) ) {
371 stoplist = g_slist_append(stoplist, selstop);
372 }
373 drag->selected = g_list_remove(drag->selected, dragger);
374 if ( just_one ) break; // iterate once if just_one is set.
375 }
376 while (stoplist) {
377 SPStop *stop = (SPStop*) stoplist->data;
378 SP_OBJECT_REPR(vector)->removeChild(SP_OBJECT_REPR(stop));
379 stoplist = g_slist_remove(stoplist, stop);
380 }
381 // if we delete first or last stop, move the next/previous to the edge
382 SPStop *first = sp_first_stop (vector);
383 if (first) {
384 if (first->offset != 0) {
385 first->offset = 0;
386 sp_repr_set_css_double (SP_OBJECT_REPR (first), "offset", 0);
387 }
388 }
389 SPStop *last = sp_last_stop (vector);
390 if (last) {
391 if (last->offset != 1) {
392 last->offset = 1;
393 sp_repr_set_css_double (SP_OBJECT_REPR (last), "offset", 1);
394 }
395 }
396 if ( just_one || (num_delete == 1) ) {
397 sp_document_done (SP_OBJECT_DOCUMENT (vector), SP_VERB_CONTEXT_GRADIENT,
398 _("Delete gradient stop"));
399 } else {
400 sp_document_done (SP_OBJECT_DOCUMENT (vector), SP_VERB_CONTEXT_GRADIENT,
401 _("Delete gradient stops"));
402 }
403 } else { // delete the gradient from the object. set fill to unset
404 SPCSSAttr *css = sp_repr_css_attr_new ();
405 if (draggabletemp->fill_or_stroke) {
406 sp_repr_css_unset_property (css, "fill");
407 } else {
408 sp_repr_css_unset_property (css, "stroke");
409 }
410 sp_repr_css_change (SP_OBJECT_REPR (item), css, "style");
411 sp_repr_css_attr_unref (css);
412 sp_document_done (SP_OBJECT_DOCUMENT (vector), SP_VERB_CONTEXT_GRADIENT,
413 _("Remove gradient"));
414 }
415 }
419 static gint
420 sp_gradient_context_root_handler(SPEventContext *event_context, GdkEvent *event)
421 {
422 static bool dragging;
424 SPDesktop *desktop = event_context->desktop;
425 Inkscape::Selection *selection = sp_desktop_selection (desktop);
427 SPGradientContext *rc = SP_GRADIENT_CONTEXT(event_context);
429 event_context->tolerance = prefs_get_int_attribute_limited("options.dragtolerance", "value", 0, 0, 100);
430 double const nudge = prefs_get_double_attribute_limited("options.nudgedistance", "value", 2, 0, 1000); // in px
432 GrDrag *drag = event_context->_grdrag;
433 g_assert (drag);
435 gint ret = FALSE;
436 switch (event->type) {
437 case GDK_2BUTTON_PRESS:
438 if ( event->button.button == 1 ) {
439 bool over_line = false;
440 SPCtrlLine *line = NULL;
441 if (drag->lines) {
442 for (GSList *l = drag->lines; (l != NULL) && (!over_line); l = l->next) {
443 line = (SPCtrlLine*) l->data;
444 over_line |= sp_gradient_context_is_over_line (rc, (SPItem*) line, NR::Point(event->motion.x, event->motion.y));
445 }
446 }
447 if (over_line) {
448 sp_gradient_context_add_stop_near_point(rc, SP_ITEM(selection->itemList()->data), rc->mousepoint_doc, event->button.time);
449 } else {
450 for (GSList const* i = selection->itemList(); i != NULL; i = i->next) {
451 SPItem *item = SP_ITEM(i->data);
452 SPGradientType new_type = (SPGradientType) prefs_get_int_attribute ("tools.gradient", "newgradient", SP_GRADIENT_TYPE_LINEAR);
453 guint new_fill = prefs_get_int_attribute ("tools.gradient", "newfillorstroke", 1);
455 SPGradient *vector = sp_gradient_vector_for_object(sp_desktop_document(desktop), desktop, SP_OBJECT (item), new_fill);
457 SPGradient *priv = sp_item_set_gradient(item, vector, new_type, new_fill);
458 sp_gradient_reset_to_userspace(priv, item);
459 }
461 sp_document_done (sp_desktop_document (desktop), SP_VERB_CONTEXT_GRADIENT,
462 _("Create default gradient"));
463 }
464 ret = TRUE;
465 }
466 break;
467 case GDK_BUTTON_PRESS:
468 if ( event->button.button == 1 ) {
469 NR::Point const button_w(event->button.x, event->button.y);
471 // save drag origin
472 event_context->xp = (gint) button_w[NR::X];
473 event_context->yp = (gint) button_w[NR::Y];
474 event_context->within_tolerance = true;
476 // remember clicked item, disregarding groups, honoring Alt; do nothing with Crtl to
477 // enable Ctrl+doubleclick of exactly the selected item(s)
478 if (!(event->button.state & GDK_CONTROL_MASK))
479 event_context->item_to_select = sp_event_context_find_item (desktop, button_w, event->button.state & GDK_MOD1_MASK, TRUE);
481 dragging = true;
482 /* Position center */
483 NR::Point const button_dt = desktop->w2d(button_w);
484 /* Snap center to nearest magnetic point */
486 rc->origin = button_dt;
488 ret = TRUE;
489 }
490 break;
491 case GDK_MOTION_NOTIFY:
492 if ( dragging
493 && ( event->motion.state & GDK_BUTTON1_MASK ) )
494 {
495 if ( event_context->within_tolerance
496 && ( abs( (gint) event->motion.x - event_context->xp ) < event_context->tolerance )
497 && ( abs( (gint) event->motion.y - event_context->yp ) < event_context->tolerance ) ) {
498 break; // do not drag if we're within tolerance from origin
499 }
500 // Once the user has moved farther than tolerance from the original location
501 // (indicating they intend to draw, not click), then always process the
502 // motion notify coordinates as given (no snapping back to origin)
503 event_context->within_tolerance = false;
505 NR::Point const motion_w(event->motion.x,
506 event->motion.y);
507 NR::Point const motion_dt = event_context->desktop->w2d(motion_w);
509 sp_gradient_drag(*rc, motion_dt, event->motion.state, event->motion.time);
511 ret = TRUE;
512 } else {
513 bool over_line = false;
514 if (drag->lines) {
515 for (GSList *l = drag->lines; l != NULL; l = l->next) {
516 over_line |= sp_gradient_context_is_over_line (rc, (SPItem*) l->data, NR::Point(event->motion.x, event->motion.y));
517 }
518 }
520 if (rc->cursor_addnode && !over_line) {
521 event_context->cursor_shape = cursor_gradient_xpm;
522 sp_event_context_update_cursor(event_context);
523 rc->cursor_addnode = false;
524 } else if (!rc->cursor_addnode && over_line) {
525 event_context->cursor_shape = cursor_gradient_add_xpm;
526 sp_event_context_update_cursor(event_context);
527 rc->cursor_addnode = true;
528 }
529 }
530 break;
531 case GDK_BUTTON_RELEASE:
532 event_context->xp = event_context->yp = 0;
533 if ( event->button.button == 1 ) {
534 if ( (event->button.state & GDK_CONTROL_MASK) && (event->button.state & GDK_MOD1_MASK ) ) {
535 bool over_line = false;
536 SPCtrlLine *line = NULL;
537 if (drag->lines) {
538 for (GSList *l = drag->lines; (l != NULL) && (!over_line); l = l->next) {
539 line = (SPCtrlLine*) l->data;
540 over_line |= sp_gradient_context_is_over_line (rc, (SPItem*) line, NR::Point(event->motion.x, event->motion.y));
541 }
542 }
543 if (over_line) {
544 sp_gradient_context_add_stop_near_point(rc, SP_ITEM(selection->itemList()->data), rc->mousepoint_doc, 0);
545 ret = TRUE;
546 }
547 } else {
548 dragging = false;
550 // unless clicked with Ctrl (to enable Ctrl+doubleclick). (don't what this is for (johan))
551 if (event->button.state & GDK_CONTROL_MASK) {
552 ret = TRUE;
553 break;
554 }
556 if (!event_context->within_tolerance) {
557 // we've been dragging, do nothing (grdrag handles that)
558 } else if (event_context->item_to_select) {
559 // no dragging, select clicked item if any
560 if (event->button.state & GDK_SHIFT_MASK) {
561 selection->toggle(event_context->item_to_select);
562 } else {
563 selection->set(event_context->item_to_select);
564 }
565 } else {
566 // click in an empty space; do the same as Esc
567 if (drag->selected) {
568 drag->deselect_all();
569 } else {
570 selection->clear();
571 }
572 }
574 event_context->item_to_select = NULL;
575 ret = TRUE;
576 }
577 }
578 break;
579 case GDK_KEY_PRESS:
580 switch (get_group0_keyval (&event->key)) {
581 case GDK_Alt_L:
582 case GDK_Alt_R:
583 case GDK_Control_L:
584 case GDK_Control_R:
585 case GDK_Shift_L:
586 case GDK_Shift_R:
587 case GDK_Meta_L: // Meta is when you press Shift+Alt (at least on my machine)
588 case GDK_Meta_R:
589 sp_event_show_modifier_tip (event_context->defaultMessageContext(), event,
590 _("<b>Ctrl</b>: snap gradient angle"),
591 _("<b>Shift</b>: draw gradient around the starting point"),
592 NULL);
593 break;
595 case GDK_x:
596 case GDK_X:
597 if (MOD__ALT_ONLY) {
598 desktop->setToolboxFocusTo ("altx-grad");
599 ret = TRUE;
600 }
601 break;
603 case GDK_Escape:
604 if (drag->selected) {
605 drag->deselect_all();
606 } else {
607 selection->clear();
608 }
609 ret = TRUE;
610 //TODO: make dragging escapable by Esc
611 break;
613 case GDK_Left: // move handle left
614 case GDK_KP_Left:
615 case GDK_KP_4:
616 if (!MOD__CTRL) { // not ctrl
617 if (MOD__ALT) { // alt
618 if (MOD__SHIFT) drag->selected_move_screen(-10, 0); // shift
619 else drag->selected_move_screen(-1, 0); // no shift
620 }
621 else { // no alt
622 if (MOD__SHIFT) drag->selected_move(-10*nudge, 0); // shift
623 else drag->selected_move(-nudge, 0); // no shift
624 }
625 ret = TRUE;
626 }
627 break;
628 case GDK_Up: // move handle up
629 case GDK_KP_Up:
630 case GDK_KP_8:
631 if (!MOD__CTRL) { // not ctrl
632 if (MOD__ALT) { // alt
633 if (MOD__SHIFT) drag->selected_move_screen(0, 10); // shift
634 else drag->selected_move_screen(0, 1); // no shift
635 }
636 else { // no alt
637 if (MOD__SHIFT) drag->selected_move(0, 10*nudge); // shift
638 else drag->selected_move(0, nudge); // no shift
639 }
640 ret = TRUE;
641 }
642 break;
643 case GDK_Right: // move handle right
644 case GDK_KP_Right:
645 case GDK_KP_6:
646 if (!MOD__CTRL) { // not ctrl
647 if (MOD__ALT) { // alt
648 if (MOD__SHIFT) drag->selected_move_screen(10, 0); // shift
649 else drag->selected_move_screen(1, 0); // no shift
650 }
651 else { // no alt
652 if (MOD__SHIFT) drag->selected_move(10*nudge, 0); // shift
653 else drag->selected_move(nudge, 0); // no shift
654 }
655 ret = TRUE;
656 }
657 break;
658 case GDK_Down: // move handle down
659 case GDK_KP_Down:
660 case GDK_KP_2:
661 if (!MOD__CTRL) { // not ctrl
662 if (MOD__ALT) { // alt
663 if (MOD__SHIFT) drag->selected_move_screen(0, -10); // shift
664 else drag->selected_move_screen(0, -1); // no shift
665 }
666 else { // no alt
667 if (MOD__SHIFT) drag->selected_move(0, -10*nudge); // shift
668 else drag->selected_move(0, -nudge); // no shift
669 }
670 ret = TRUE;
671 }
672 break;
673 case GDK_r:
674 case GDK_R:
675 if (MOD__SHIFT_ONLY) {
676 // First try selected dragger
677 if (drag && drag->selected) {
678 drag->selected_reverse_vector();
679 } else { // If no drag or no dragger selected, act on selection (both fill and stroke gradients)
680 for (GSList const* i = selection->itemList(); i != NULL; i = i->next) {
681 sp_item_gradient_reverse_vector (SP_ITEM(i->data), true);
682 sp_item_gradient_reverse_vector (SP_ITEM(i->data), false);
683 }
684 }
685 // we did an undoable action
686 sp_document_done (sp_desktop_document (desktop), SP_VERB_CONTEXT_GRADIENT,
687 _("Invert gradient"));
688 ret = TRUE;
689 }
690 break;
691 /*
692 case GDK_Insert:
693 case GDK_KP_Insert:
694 // with any modifiers
695 sp_node_selected_add_node();
696 ret = TRUE;
697 break;
698 */
699 case GDK_Delete:
700 case GDK_KP_Delete:
701 case GDK_BackSpace:
702 if ( drag->selected ) {
703 sp_gradient_context_delete_stops ( rc, SP_ITEM(selection->itemList()->data), drag, MOD__CTRL_ONLY ) ;
704 ret = TRUE;
705 }
706 break;
707 default:
708 break;
709 }
710 break;
711 case GDK_KEY_RELEASE:
712 switch (get_group0_keyval (&event->key)) {
713 case GDK_Alt_L:
714 case GDK_Alt_R:
715 case GDK_Control_L:
716 case GDK_Control_R:
717 case GDK_Shift_L:
718 case GDK_Shift_R:
719 case GDK_Meta_L: // Meta is when you press Shift+Alt
720 case GDK_Meta_R:
721 event_context->defaultMessageContext()->clear();
722 break;
723 default:
724 break;
725 }
726 break;
727 default:
728 break;
729 }
731 if (!ret) {
732 if (((SPEventContextClass *) parent_class)->root_handler) {
733 ret = ((SPEventContextClass *) parent_class)->root_handler(event_context, event);
734 }
735 }
737 return ret;
738 }
740 static void sp_gradient_drag(SPGradientContext &rc, NR::Point const pt, guint state, guint32 etime)
741 {
742 SPDesktop *desktop = SP_EVENT_CONTEXT(&rc)->desktop;
743 Inkscape::Selection *selection = sp_desktop_selection(desktop);
744 SPDocument *document = sp_desktop_document(desktop);
745 SPEventContext *ec = SP_EVENT_CONTEXT(&rc);
747 if (!selection->isEmpty()) {
748 int type = prefs_get_int_attribute ("tools.gradient", "newgradient", 1);
749 int fill_or_stroke = prefs_get_int_attribute ("tools.gradient", "newfillorstroke", 1);
751 SPGradient *vector;
752 if (ec->item_to_select) {
753 vector = sp_gradient_vector_for_object(document, desktop, ec->item_to_select, fill_or_stroke);
754 } else {
755 vector = sp_gradient_vector_for_object(document, desktop, SP_ITEM(selection->itemList()->data), fill_or_stroke);
756 }
758 // HACK: reset fill-opacity - that 0.75 is annoying; BUT remove this when we have an opacity slider for all tabs
759 SPCSSAttr *css = sp_repr_css_attr_new();
760 sp_repr_css_set_property(css, "fill-opacity", "1.0");
762 for (GSList const *i = selection->itemList(); i != NULL; i = i->next) {
764 //FIXME: see above
765 sp_repr_css_change_recursive(SP_OBJECT_REPR(i->data), css, "style");
767 sp_item_set_gradient(SP_ITEM(i->data), vector, (SPGradientType) type, fill_or_stroke);
769 if (type == SP_GRADIENT_TYPE_LINEAR) {
770 sp_item_gradient_set_coords (SP_ITEM(i->data), POINT_LG_BEGIN, 0, rc.origin, fill_or_stroke, true, false);
771 sp_item_gradient_set_coords (SP_ITEM(i->data), POINT_LG_END, 0, pt, fill_or_stroke, true, false);
772 } else if (type == SP_GRADIENT_TYPE_RADIAL) {
773 sp_item_gradient_set_coords (SP_ITEM(i->data), POINT_RG_CENTER, 0, rc.origin, fill_or_stroke, true, false);
774 sp_item_gradient_set_coords (SP_ITEM(i->data), POINT_RG_R1, 0, pt, fill_or_stroke, true, false);
775 }
776 SP_OBJECT (i->data)->requestModified(SP_OBJECT_MODIFIED_FLAG);
777 }
778 if (ec->_grdrag) {
779 ec->_grdrag->updateDraggers();
780 // prevent regenerating draggers by selection modified signal, which sometimes
781 // comes too late and thus destroys the knot which we will now grab:
782 ec->_grdrag->local_change = true;
783 // give the grab out-of-bounds values of xp/yp because we're already dragging
784 // and therefore are already out of tolerance
785 ec->_grdrag->grabKnot (SP_ITEM(selection->itemList()->data),
786 type == SP_GRADIENT_TYPE_LINEAR? POINT_LG_END : POINT_RG_R1,
787 0, //point_i
788 fill_or_stroke, 99999, 99999, etime);
789 }
790 // We did an undoable action, but sp_document_done will be called by the knot when released
792 // status text; we do not track coords because this branch is run once, not all the time
793 // during drag
794 int n_objects = g_slist_length((GSList *) selection->itemList());
795 rc._message_context->setF(Inkscape::NORMAL_MESSAGE,
796 ngettext("<b>Gradient</b> for %d object; with <b>Ctrl</b> to snap angle",
797 "<b>Gradient</b> for %d objects; with <b>Ctrl</b> to snap angle", n_objects),
798 n_objects);
799 } else {
800 sp_desktop_message_stack(desktop)->flash(Inkscape::WARNING_MESSAGE, _("Select <b>objects</b> on which to create gradient."));
801 }
802 }
805 /*
806 Local Variables:
807 mode:c++
808 c-file-style:"stroustrup"
809 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
810 indent-tabs-mode:nil
811 fill-column:99
812 End:
813 */
814 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :