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 = 6;
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 double dist_screen = NR::L2 (rc->mousepoint_doc - nearest) * desktop->current_zoom();
187 double tolerance = (double) SP_EVENT_CONTEXT(rc)->tolerance;
189 bool close = (dist_screen < 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 SPDesktop *desktop = SP_EVENT_CONTEXT (rc)->desktop;
227 double tolerance = (double) ec->tolerance;
229 gfloat offset; // type of SPStop.offset = gfloat
230 SPGradient *gradient;
231 bool fill_or_stroke = true;
232 bool r1_knot = false;
234 bool addknot = false;
235 do {
236 gradient = sp_item_gradient (item, fill_or_stroke);
237 if (SP_IS_LINEARGRADIENT(gradient)) {
238 NR::Point begin = sp_item_gradient_get_coords(item, POINT_LG_BEGIN, 0, fill_or_stroke);
239 NR::Point end = sp_item_gradient_get_coords(item, POINT_LG_END, 0, fill_or_stroke);
241 NR::Point nearest = snap_vector_midpoint (mouse_p, begin, end);
242 double dist_screen = NR::L2 (mouse_p - nearest) * desktop->current_zoom();
243 if ( dist_screen < tolerance ) {
244 // add the knot
245 offset = get_offset_between_points(nearest, begin, end);
246 addknot = true;
247 break; // break out of the while loop: add only one knot
248 }
249 } else if (SP_IS_RADIALGRADIENT(gradient)) {
250 NR::Point begin = sp_item_gradient_get_coords(item, POINT_RG_CENTER, 0, fill_or_stroke);
251 NR::Point end = sp_item_gradient_get_coords(item, POINT_RG_R1, 0, fill_or_stroke);
252 NR::Point nearest = snap_vector_midpoint (mouse_p, begin, end);
253 double dist_screen = NR::L2 (mouse_p - nearest) * desktop->current_zoom();
254 if ( dist_screen < tolerance ) {
255 offset = get_offset_between_points(nearest, begin, end);
256 addknot = true;
257 r1_knot = true;
258 break; // break out of the while loop: add only one knot
259 }
261 end = sp_item_gradient_get_coords(item, POINT_RG_R2, 0, fill_or_stroke);
262 nearest = snap_vector_midpoint (mouse_p, begin, end);
263 dist_screen = NR::L2 (mouse_p - nearest) * desktop->current_zoom();
264 if ( dist_screen < tolerance ) {
265 offset = get_offset_between_points(nearest, begin, end);
266 addknot = true;
267 r1_knot = false;
268 break; // break out of the while loop: add only one knot
269 }
270 }
271 fill_or_stroke = !fill_or_stroke;
272 } while (!fill_or_stroke && !addknot) ;
274 if (addknot) {
275 SPGradient *vector = sp_gradient_get_vector (gradient, false);
276 SPStop* prev_stop = sp_first_stop(vector);
277 SPStop* next_stop = sp_next_stop(prev_stop);
278 while ( (next_stop) && (next_stop->offset < offset) ) {
279 prev_stop = next_stop;
280 next_stop = sp_next_stop(next_stop);
281 }
282 if (!next_stop) {
283 // logical error: the endstop should have offset 1 and should always be more than this offset here
284 return;
285 }
287 Inkscape::XML::Node *new_stop_repr = NULL;
288 new_stop_repr = SP_OBJECT_REPR(prev_stop)->duplicate();
289 SP_OBJECT_REPR(vector)->addChild(new_stop_repr, SP_OBJECT_REPR(prev_stop));
291 SPStop *newstop = (SPStop *) SP_OBJECT_DOCUMENT(vector)->getObjectByRepr(new_stop_repr);
292 newstop->offset = offset;
293 sp_repr_set_css_double( SP_OBJECT_REPR(newstop), "offset", (double)offset);
294 guint32 const c1 = sp_stop_get_rgba32(prev_stop);
295 guint32 const c2 = sp_stop_get_rgba32(next_stop);
296 guint32 cnew = average_color (c1, c2, (offset - prev_stop->offset) / (next_stop->offset - prev_stop->offset));
297 Inkscape::CSSOStringStream os;
298 gchar c[64];
299 sp_svg_write_color (c, 64, cnew);
300 gdouble opacity = (gdouble) SP_RGBA32_A_F (cnew);
301 os << "stop-color:" << c << ";stop-opacity:" << opacity <<";";
302 SP_OBJECT_REPR (newstop)->setAttribute("style", os.str().c_str());
305 Inkscape::GC::release(new_stop_repr);
306 sp_document_done (SP_OBJECT_DOCUMENT (vector), SP_VERB_CONTEXT_GRADIENT,
307 _("Add gradient stop"));
309 ec->_grdrag->updateDraggers();
310 sp_gradient_ensure_vector (gradient);
312 if (vector->has_stops) {
313 int i = 0;
314 for ( SPObject *ochild = sp_object_first_child (SP_OBJECT(vector)) ; ochild != NULL ; ochild = SP_OBJECT_NEXT(ochild) ) {
315 if (SP_IS_STOP (ochild)) {
316 if ( SP_STOP(ochild) == newstop ) {
317 break;
318 } else {
319 i++;
320 }
321 }
322 }
324 gradient = sp_item_gradient (item, fill_or_stroke);
325 GrPointType pointtype = POINT_G_INVALID;
326 if (SP_IS_LINEARGRADIENT(gradient)) {
327 pointtype = POINT_LG_MID;
328 } else if (SP_IS_RADIALGRADIENT(gradient)) {
329 pointtype = r1_knot ? POINT_RG_MID1 : POINT_RG_MID2;
330 }
331 GrDragger *dragger = SP_EVENT_CONTEXT(rc)->_grdrag->getDraggerFor (item, pointtype, i, fill_or_stroke);
332 if (dragger && (etime == 0) ) {
333 ec->_grdrag->setSelected (dragger);
334 } else {
335 ec->_grdrag->grabKnot (item,
336 pointtype,
337 i,
338 fill_or_stroke, 99999, 99999, etime);
339 }
340 ec->_grdrag->local_change = true;
342 }
343 }
344 }
347 static gint
348 sp_gradient_context_root_handler(SPEventContext *event_context, GdkEvent *event)
349 {
350 static bool dragging;
352 SPDesktop *desktop = event_context->desktop;
353 Inkscape::Selection *selection = sp_desktop_selection (desktop);
355 SPGradientContext *rc = SP_GRADIENT_CONTEXT(event_context);
357 event_context->tolerance = prefs_get_int_attribute_limited("options.dragtolerance", "value", 0, 0, 100);
358 double const nudge = prefs_get_double_attribute_limited("options.nudgedistance", "value", 2, 0, 1000); // in px
360 GrDrag *drag = event_context->_grdrag;
361 g_assert (drag);
363 gint ret = FALSE;
364 switch (event->type) {
365 case GDK_2BUTTON_PRESS:
366 if ( event->button.button == 1 ) {
367 bool over_line = false;
368 SPCtrlLine *line = NULL;
369 if (drag->lines) {
370 for (GSList *l = drag->lines; (l != NULL) && (!over_line); l = l->next) {
371 line = (SPCtrlLine*) l->data;
372 over_line |= sp_gradient_context_is_over_line (rc, (SPItem*) line, NR::Point(event->motion.x, event->motion.y));
373 }
374 }
375 if (over_line) {
376 sp_gradient_context_add_stop_near_point(rc, SP_ITEM(selection->itemList()->data), rc->mousepoint_doc, event->button.time);
377 } else {
378 for (GSList const* i = selection->itemList(); i != NULL; i = i->next) {
379 SPItem *item = SP_ITEM(i->data);
380 SPGradientType new_type = (SPGradientType) prefs_get_int_attribute ("tools.gradient", "newgradient", SP_GRADIENT_TYPE_LINEAR);
381 guint new_fill = prefs_get_int_attribute ("tools.gradient", "newfillorstroke", 1);
383 SPGradient *vector = sp_gradient_vector_for_object(sp_desktop_document(desktop), desktop, SP_OBJECT (item), new_fill);
385 SPGradient *priv = sp_item_set_gradient(item, vector, new_type, new_fill);
386 sp_gradient_reset_to_userspace(priv, item);
387 }
389 sp_document_done (sp_desktop_document (desktop), SP_VERB_CONTEXT_GRADIENT,
390 _("Create default gradient"));
391 }
392 ret = TRUE;
393 }
394 break;
395 case GDK_BUTTON_PRESS:
396 if ( event->button.button == 1 ) {
397 NR::Point const button_w(event->button.x, event->button.y);
399 // save drag origin
400 event_context->xp = (gint) button_w[NR::X];
401 event_context->yp = (gint) button_w[NR::Y];
402 event_context->within_tolerance = true;
404 // remember clicked item, disregarding groups, honoring Alt; do nothing with Crtl to
405 // enable Ctrl+doubleclick of exactly the selected item(s)
406 if (!(event->button.state & GDK_CONTROL_MASK))
407 event_context->item_to_select = sp_event_context_find_item (desktop, button_w, event->button.state & GDK_MOD1_MASK, TRUE);
409 dragging = true;
410 /* Position center */
411 NR::Point const button_dt = desktop->w2d(button_w);
412 /* Snap center to nearest magnetic point */
414 rc->origin = button_dt;
416 ret = TRUE;
417 }
418 break;
419 case GDK_MOTION_NOTIFY:
420 if ( dragging
421 && ( event->motion.state & GDK_BUTTON1_MASK ) )
422 {
423 if ( event_context->within_tolerance
424 && ( abs( (gint) event->motion.x - event_context->xp ) < event_context->tolerance )
425 && ( abs( (gint) event->motion.y - event_context->yp ) < event_context->tolerance ) ) {
426 break; // do not drag if we're within tolerance from origin
427 }
428 // Once the user has moved farther than tolerance from the original location
429 // (indicating they intend to draw, not click), then always process the
430 // motion notify coordinates as given (no snapping back to origin)
431 event_context->within_tolerance = false;
433 NR::Point const motion_w(event->motion.x,
434 event->motion.y);
435 NR::Point const motion_dt = event_context->desktop->w2d(motion_w);
437 sp_gradient_drag(*rc, motion_dt, event->motion.state, event->motion.time);
439 ret = TRUE;
440 } else {
441 bool over_line = false;
442 if (drag->lines) {
443 for (GSList *l = drag->lines; l != NULL; l = l->next) {
444 over_line |= sp_gradient_context_is_over_line (rc, (SPItem*) l->data, NR::Point(event->motion.x, event->motion.y));
445 }
446 }
448 if (rc->cursor_addnode && !over_line) {
449 event_context->cursor_shape = cursor_gradient_xpm;
450 sp_event_context_update_cursor(event_context);
451 rc->cursor_addnode = false;
452 } else if (!rc->cursor_addnode && over_line) {
453 event_context->cursor_shape = cursor_gradient_add_xpm;
454 sp_event_context_update_cursor(event_context);
455 rc->cursor_addnode = true;
456 }
457 }
458 break;
459 case GDK_BUTTON_RELEASE:
460 event_context->xp = event_context->yp = 0;
461 if ( event->button.button == 1 ) {
462 if ( (event->button.state & GDK_CONTROL_MASK) && (event->button.state & GDK_MOD1_MASK ) ) {
463 bool over_line = false;
464 SPCtrlLine *line = NULL;
465 if (drag->lines) {
466 for (GSList *l = drag->lines; (l != NULL) && (!over_line); l = l->next) {
467 line = (SPCtrlLine*) l->data;
468 over_line |= sp_gradient_context_is_over_line (rc, (SPItem*) line, NR::Point(event->motion.x, event->motion.y));
469 }
470 }
471 if (over_line) {
472 sp_gradient_context_add_stop_near_point(rc, SP_ITEM(selection->itemList()->data), rc->mousepoint_doc, 0);
473 ret = TRUE;
474 }
475 } else {
476 dragging = false;
478 // unless clicked with Ctrl (to enable Ctrl+doubleclick). (don't what this is for (johan))
479 if (event->button.state & GDK_CONTROL_MASK) {
480 ret = TRUE;
481 break;
482 }
484 if (!event_context->within_tolerance) {
485 // we've been dragging, do nothing (grdrag handles that)
486 } else if (event_context->item_to_select) {
487 // no dragging, select clicked item if any
488 if (event->button.state & GDK_SHIFT_MASK) {
489 selection->toggle(event_context->item_to_select);
490 } else {
491 selection->set(event_context->item_to_select);
492 }
493 } else {
494 // click in an empty space; do the same as Esc
495 if (drag->selected) {
496 drag->deselectAll();
497 } else {
498 selection->clear();
499 }
500 }
502 event_context->item_to_select = NULL;
503 ret = TRUE;
504 }
505 }
506 break;
507 case GDK_KEY_PRESS:
508 switch (get_group0_keyval (&event->key)) {
509 case GDK_Alt_L:
510 case GDK_Alt_R:
511 case GDK_Control_L:
512 case GDK_Control_R:
513 case GDK_Shift_L:
514 case GDK_Shift_R:
515 case GDK_Meta_L: // Meta is when you press Shift+Alt (at least on my machine)
516 case GDK_Meta_R:
517 sp_event_show_modifier_tip (event_context->defaultMessageContext(), event,
518 _("<b>Ctrl</b>: snap gradient angle"),
519 _("<b>Shift</b>: draw gradient around the starting point"),
520 NULL);
521 break;
523 case GDK_x:
524 case GDK_X:
525 if (MOD__ALT_ONLY) {
526 desktop->setToolboxFocusTo ("altx-grad");
527 ret = TRUE;
528 }
529 break;
531 case GDK_Escape:
532 if (drag->selected) {
533 drag->deselectAll();
534 } else {
535 selection->clear();
536 }
537 ret = TRUE;
538 //TODO: make dragging escapable by Esc
539 break;
541 case GDK_Left: // move handle left
542 case GDK_KP_Left:
543 case GDK_KP_4:
544 if (!MOD__CTRL) { // not ctrl
545 if (MOD__ALT) { // alt
546 if (MOD__SHIFT) drag->selected_move_screen(-10, 0); // shift
547 else drag->selected_move_screen(-1, 0); // no shift
548 }
549 else { // no alt
550 if (MOD__SHIFT) drag->selected_move(-10*nudge, 0); // shift
551 else drag->selected_move(-nudge, 0); // no shift
552 }
553 ret = TRUE;
554 }
555 break;
556 case GDK_Up: // move handle up
557 case GDK_KP_Up:
558 case GDK_KP_8:
559 if (!MOD__CTRL) { // not ctrl
560 if (MOD__ALT) { // alt
561 if (MOD__SHIFT) drag->selected_move_screen(0, 10); // shift
562 else drag->selected_move_screen(0, 1); // no shift
563 }
564 else { // no alt
565 if (MOD__SHIFT) drag->selected_move(0, 10*nudge); // shift
566 else drag->selected_move(0, nudge); // no shift
567 }
568 ret = TRUE;
569 }
570 break;
571 case GDK_Right: // move handle right
572 case GDK_KP_Right:
573 case GDK_KP_6:
574 if (!MOD__CTRL) { // not ctrl
575 if (MOD__ALT) { // alt
576 if (MOD__SHIFT) drag->selected_move_screen(10, 0); // shift
577 else drag->selected_move_screen(1, 0); // no shift
578 }
579 else { // no alt
580 if (MOD__SHIFT) drag->selected_move(10*nudge, 0); // shift
581 else drag->selected_move(nudge, 0); // no shift
582 }
583 ret = TRUE;
584 }
585 break;
586 case GDK_Down: // move handle down
587 case GDK_KP_Down:
588 case GDK_KP_2:
589 if (!MOD__CTRL) { // not ctrl
590 if (MOD__ALT) { // alt
591 if (MOD__SHIFT) drag->selected_move_screen(0, -10); // shift
592 else drag->selected_move_screen(0, -1); // no shift
593 }
594 else { // no alt
595 if (MOD__SHIFT) drag->selected_move(0, -10*nudge); // shift
596 else drag->selected_move(0, -nudge); // no shift
597 }
598 ret = TRUE;
599 }
600 break;
601 case GDK_r:
602 case GDK_R:
603 if (MOD__SHIFT_ONLY) {
604 // First try selected dragger
605 if (drag && drag->selected) {
606 drag->selected_reverse_vector();
607 } else { // If no drag or no dragger selected, act on selection (both fill and stroke gradients)
608 for (GSList const* i = selection->itemList(); i != NULL; i = i->next) {
609 sp_item_gradient_reverse_vector (SP_ITEM(i->data), true);
610 sp_item_gradient_reverse_vector (SP_ITEM(i->data), false);
611 }
612 }
613 // we did an undoable action
614 sp_document_done (sp_desktop_document (desktop), SP_VERB_CONTEXT_GRADIENT,
615 _("Invert gradient"));
616 ret = TRUE;
617 }
618 break;
619 /*
620 case GDK_Insert:
621 case GDK_KP_Insert:
622 // with any modifiers:
623 // insert mid-stops between selected stops in gradient, or between all stops if none or only one selected
624 ret = TRUE;
625 break;
626 */
627 case GDK_Delete:
628 case GDK_KP_Delete:
629 case GDK_BackSpace:
630 if ( drag->selected ) {
631 drag->deleteSelected(MOD__CTRL_ONLY);
632 ret = TRUE;
633 }
634 break;
635 default:
636 break;
637 }
638 break;
639 case GDK_KEY_RELEASE:
640 switch (get_group0_keyval (&event->key)) {
641 case GDK_Alt_L:
642 case GDK_Alt_R:
643 case GDK_Control_L:
644 case GDK_Control_R:
645 case GDK_Shift_L:
646 case GDK_Shift_R:
647 case GDK_Meta_L: // Meta is when you press Shift+Alt
648 case GDK_Meta_R:
649 event_context->defaultMessageContext()->clear();
650 break;
651 default:
652 break;
653 }
654 break;
655 default:
656 break;
657 }
659 if (!ret) {
660 if (((SPEventContextClass *) parent_class)->root_handler) {
661 ret = ((SPEventContextClass *) parent_class)->root_handler(event_context, event);
662 }
663 }
665 return ret;
666 }
668 static void sp_gradient_drag(SPGradientContext &rc, NR::Point const pt, guint state, guint32 etime)
669 {
670 SPDesktop *desktop = SP_EVENT_CONTEXT(&rc)->desktop;
671 Inkscape::Selection *selection = sp_desktop_selection(desktop);
672 SPDocument *document = sp_desktop_document(desktop);
673 SPEventContext *ec = SP_EVENT_CONTEXT(&rc);
675 if (!selection->isEmpty()) {
676 int type = prefs_get_int_attribute ("tools.gradient", "newgradient", 1);
677 int fill_or_stroke = prefs_get_int_attribute ("tools.gradient", "newfillorstroke", 1);
679 SPGradient *vector;
680 if (ec->item_to_select) {
681 vector = sp_gradient_vector_for_object(document, desktop, ec->item_to_select, fill_or_stroke);
682 } else {
683 vector = sp_gradient_vector_for_object(document, desktop, SP_ITEM(selection->itemList()->data), fill_or_stroke);
684 }
686 // HACK: reset fill-opacity - that 0.75 is annoying; BUT remove this when we have an opacity slider for all tabs
687 SPCSSAttr *css = sp_repr_css_attr_new();
688 sp_repr_css_set_property(css, "fill-opacity", "1.0");
690 for (GSList const *i = selection->itemList(); i != NULL; i = i->next) {
692 //FIXME: see above
693 sp_repr_css_change_recursive(SP_OBJECT_REPR(i->data), css, "style");
695 sp_item_set_gradient(SP_ITEM(i->data), vector, (SPGradientType) type, fill_or_stroke);
697 if (type == SP_GRADIENT_TYPE_LINEAR) {
698 sp_item_gradient_set_coords (SP_ITEM(i->data), POINT_LG_BEGIN, 0, rc.origin, fill_or_stroke, true, false);
699 sp_item_gradient_set_coords (SP_ITEM(i->data), POINT_LG_END, 0, pt, fill_or_stroke, true, false);
700 } else if (type == SP_GRADIENT_TYPE_RADIAL) {
701 sp_item_gradient_set_coords (SP_ITEM(i->data), POINT_RG_CENTER, 0, rc.origin, fill_or_stroke, true, false);
702 sp_item_gradient_set_coords (SP_ITEM(i->data), POINT_RG_R1, 0, pt, fill_or_stroke, true, false);
703 }
704 SP_OBJECT (i->data)->requestModified(SP_OBJECT_MODIFIED_FLAG);
705 }
706 if (ec->_grdrag) {
707 ec->_grdrag->updateDraggers();
708 // prevent regenerating draggers by selection modified signal, which sometimes
709 // comes too late and thus destroys the knot which we will now grab:
710 ec->_grdrag->local_change = true;
711 // give the grab out-of-bounds values of xp/yp because we're already dragging
712 // and therefore are already out of tolerance
713 ec->_grdrag->grabKnot (SP_ITEM(selection->itemList()->data),
714 type == SP_GRADIENT_TYPE_LINEAR? POINT_LG_END : POINT_RG_R1,
715 0, //point_i
716 fill_or_stroke, 99999, 99999, etime);
717 }
718 // We did an undoable action, but sp_document_done will be called by the knot when released
720 // status text; we do not track coords because this branch is run once, not all the time
721 // during drag
722 int n_objects = g_slist_length((GSList *) selection->itemList());
723 rc._message_context->setF(Inkscape::NORMAL_MESSAGE,
724 ngettext("<b>Gradient</b> for %d object; with <b>Ctrl</b> to snap angle",
725 "<b>Gradient</b> for %d objects; with <b>Ctrl</b> to snap angle", n_objects),
726 n_objects);
727 } else {
728 sp_desktop_message_stack(desktop)->flash(Inkscape::WARNING_MESSAGE, _("Select <b>objects</b> on which to create gradient."));
729 }
730 }
733 /*
734 Local Variables:
735 mode:c++
736 c-file-style:"stroustrup"
737 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
738 indent-tabs-mode:nil
739 fill-column:99
740 End:
741 */
742 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :