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 }
323 GrDragger *dragger = NULL;
324 gradient = sp_item_gradient (item, fill_or_stroke);
325 GrPointType pointtype;
326 if (SP_IS_LINEARGRADIENT(gradient)) {
327 dragger = SP_EVENT_CONTEXT(rc)->_grdrag->getDraggerFor (item, POINT_LG_MID, i, fill_or_stroke);
328 pointtype = POINT_LG_MID;
329 } else if (SP_IS_RADIALGRADIENT(gradient)) {
330 dragger = SP_EVENT_CONTEXT(rc)->_grdrag->getDraggerFor (item, r1_knot ? POINT_RG_MID1 : POINT_RG_MID2, i, fill_or_stroke);
331 pointtype = r1_knot ? POINT_RG_MID1 : POINT_RG_MID2;
332 }
333 if (dragger && (etime == 0) ) {
334 ec->_grdrag->setSelected (dragger);
335 } else {
336 ec->_grdrag->grabKnot (item,
337 pointtype,
338 i,
339 fill_or_stroke, 99999, 99999, etime);
340 }
341 ec->_grdrag->local_change = true;
343 }
344 }
345 }
348 static gint
349 sp_gradient_context_root_handler(SPEventContext *event_context, GdkEvent *event)
350 {
351 static bool dragging;
353 SPDesktop *desktop = event_context->desktop;
354 Inkscape::Selection *selection = sp_desktop_selection (desktop);
356 SPGradientContext *rc = SP_GRADIENT_CONTEXT(event_context);
358 event_context->tolerance = prefs_get_int_attribute_limited("options.dragtolerance", "value", 0, 0, 100);
359 double const nudge = prefs_get_double_attribute_limited("options.nudgedistance", "value", 2, 0, 1000); // in px
361 GrDrag *drag = event_context->_grdrag;
362 g_assert (drag);
364 gint ret = FALSE;
365 switch (event->type) {
366 case GDK_2BUTTON_PRESS:
367 if ( event->button.button == 1 ) {
368 bool over_line = false;
369 SPCtrlLine *line = NULL;
370 if (drag->lines) {
371 for (GSList *l = drag->lines; (l != NULL) && (!over_line); l = l->next) {
372 line = (SPCtrlLine*) l->data;
373 over_line |= sp_gradient_context_is_over_line (rc, (SPItem*) line, NR::Point(event->motion.x, event->motion.y));
374 }
375 }
376 if (over_line) {
377 sp_gradient_context_add_stop_near_point(rc, SP_ITEM(selection->itemList()->data), rc->mousepoint_doc, event->button.time);
378 } else {
379 for (GSList const* i = selection->itemList(); i != NULL; i = i->next) {
380 SPItem *item = SP_ITEM(i->data);
381 SPGradientType new_type = (SPGradientType) prefs_get_int_attribute ("tools.gradient", "newgradient", SP_GRADIENT_TYPE_LINEAR);
382 guint new_fill = prefs_get_int_attribute ("tools.gradient", "newfillorstroke", 1);
384 SPGradient *vector = sp_gradient_vector_for_object(sp_desktop_document(desktop), desktop, SP_OBJECT (item), new_fill);
386 SPGradient *priv = sp_item_set_gradient(item, vector, new_type, new_fill);
387 sp_gradient_reset_to_userspace(priv, item);
388 }
390 sp_document_done (sp_desktop_document (desktop), SP_VERB_CONTEXT_GRADIENT,
391 _("Create default gradient"));
392 }
393 ret = TRUE;
394 }
395 break;
396 case GDK_BUTTON_PRESS:
397 if ( event->button.button == 1 ) {
398 NR::Point const button_w(event->button.x, event->button.y);
400 // save drag origin
401 event_context->xp = (gint) button_w[NR::X];
402 event_context->yp = (gint) button_w[NR::Y];
403 event_context->within_tolerance = true;
405 // remember clicked item, disregarding groups, honoring Alt; do nothing with Crtl to
406 // enable Ctrl+doubleclick of exactly the selected item(s)
407 if (!(event->button.state & GDK_CONTROL_MASK))
408 event_context->item_to_select = sp_event_context_find_item (desktop, button_w, event->button.state & GDK_MOD1_MASK, TRUE);
410 dragging = true;
411 /* Position center */
412 NR::Point const button_dt = desktop->w2d(button_w);
413 /* Snap center to nearest magnetic point */
415 rc->origin = button_dt;
417 ret = TRUE;
418 }
419 break;
420 case GDK_MOTION_NOTIFY:
421 if ( dragging
422 && ( event->motion.state & GDK_BUTTON1_MASK ) )
423 {
424 if ( event_context->within_tolerance
425 && ( abs( (gint) event->motion.x - event_context->xp ) < event_context->tolerance )
426 && ( abs( (gint) event->motion.y - event_context->yp ) < event_context->tolerance ) ) {
427 break; // do not drag if we're within tolerance from origin
428 }
429 // Once the user has moved farther than tolerance from the original location
430 // (indicating they intend to draw, not click), then always process the
431 // motion notify coordinates as given (no snapping back to origin)
432 event_context->within_tolerance = false;
434 NR::Point const motion_w(event->motion.x,
435 event->motion.y);
436 NR::Point const motion_dt = event_context->desktop->w2d(motion_w);
438 sp_gradient_drag(*rc, motion_dt, event->motion.state, event->motion.time);
440 ret = TRUE;
441 } else {
442 bool over_line = false;
443 if (drag->lines) {
444 for (GSList *l = drag->lines; l != NULL; l = l->next) {
445 over_line |= sp_gradient_context_is_over_line (rc, (SPItem*) l->data, NR::Point(event->motion.x, event->motion.y));
446 }
447 }
449 if (rc->cursor_addnode && !over_line) {
450 event_context->cursor_shape = cursor_gradient_xpm;
451 sp_event_context_update_cursor(event_context);
452 rc->cursor_addnode = false;
453 } else if (!rc->cursor_addnode && over_line) {
454 event_context->cursor_shape = cursor_gradient_add_xpm;
455 sp_event_context_update_cursor(event_context);
456 rc->cursor_addnode = true;
457 }
458 }
459 break;
460 case GDK_BUTTON_RELEASE:
461 event_context->xp = event_context->yp = 0;
462 if ( event->button.button == 1 ) {
463 if ( (event->button.state & GDK_CONTROL_MASK) && (event->button.state & GDK_MOD1_MASK ) ) {
464 bool over_line = false;
465 SPCtrlLine *line = NULL;
466 if (drag->lines) {
467 for (GSList *l = drag->lines; (l != NULL) && (!over_line); l = l->next) {
468 line = (SPCtrlLine*) l->data;
469 over_line |= sp_gradient_context_is_over_line (rc, (SPItem*) line, NR::Point(event->motion.x, event->motion.y));
470 }
471 }
472 if (over_line) {
473 sp_gradient_context_add_stop_near_point(rc, SP_ITEM(selection->itemList()->data), rc->mousepoint_doc, 0);
474 ret = TRUE;
475 }
476 } else {
477 dragging = false;
479 // unless clicked with Ctrl (to enable Ctrl+doubleclick). (don't what this is for (johan))
480 if (event->button.state & GDK_CONTROL_MASK) {
481 ret = TRUE;
482 break;
483 }
485 if (!event_context->within_tolerance) {
486 // we've been dragging, do nothing (grdrag handles that)
487 } else if (event_context->item_to_select) {
488 // no dragging, select clicked item if any
489 if (event->button.state & GDK_SHIFT_MASK) {
490 selection->toggle(event_context->item_to_select);
491 } else {
492 selection->set(event_context->item_to_select);
493 }
494 } else {
495 // click in an empty space; do the same as Esc
496 if (drag->selected) {
497 drag->deselectAll();
498 } else {
499 selection->clear();
500 }
501 }
503 event_context->item_to_select = NULL;
504 ret = TRUE;
505 }
506 }
507 break;
508 case GDK_KEY_PRESS:
509 switch (get_group0_keyval (&event->key)) {
510 case GDK_Alt_L:
511 case GDK_Alt_R:
512 case GDK_Control_L:
513 case GDK_Control_R:
514 case GDK_Shift_L:
515 case GDK_Shift_R:
516 case GDK_Meta_L: // Meta is when you press Shift+Alt (at least on my machine)
517 case GDK_Meta_R:
518 sp_event_show_modifier_tip (event_context->defaultMessageContext(), event,
519 _("<b>Ctrl</b>: snap gradient angle"),
520 _("<b>Shift</b>: draw gradient around the starting point"),
521 NULL);
522 break;
524 case GDK_x:
525 case GDK_X:
526 if (MOD__ALT_ONLY) {
527 desktop->setToolboxFocusTo ("altx-grad");
528 ret = TRUE;
529 }
530 break;
532 case GDK_Escape:
533 if (drag->selected) {
534 drag->deselectAll();
535 } else {
536 selection->clear();
537 }
538 ret = TRUE;
539 //TODO: make dragging escapable by Esc
540 break;
542 case GDK_Left: // move handle left
543 case GDK_KP_Left:
544 case GDK_KP_4:
545 if (!MOD__CTRL) { // not ctrl
546 if (MOD__ALT) { // alt
547 if (MOD__SHIFT) drag->selected_move_screen(-10, 0); // shift
548 else drag->selected_move_screen(-1, 0); // no shift
549 }
550 else { // no alt
551 if (MOD__SHIFT) drag->selected_move(-10*nudge, 0); // shift
552 else drag->selected_move(-nudge, 0); // no shift
553 }
554 ret = TRUE;
555 }
556 break;
557 case GDK_Up: // move handle up
558 case GDK_KP_Up:
559 case GDK_KP_8:
560 if (!MOD__CTRL) { // not ctrl
561 if (MOD__ALT) { // alt
562 if (MOD__SHIFT) drag->selected_move_screen(0, 10); // shift
563 else drag->selected_move_screen(0, 1); // no shift
564 }
565 else { // no alt
566 if (MOD__SHIFT) drag->selected_move(0, 10*nudge); // shift
567 else drag->selected_move(0, nudge); // no shift
568 }
569 ret = TRUE;
570 }
571 break;
572 case GDK_Right: // move handle right
573 case GDK_KP_Right:
574 case GDK_KP_6:
575 if (!MOD__CTRL) { // not ctrl
576 if (MOD__ALT) { // alt
577 if (MOD__SHIFT) drag->selected_move_screen(10, 0); // shift
578 else drag->selected_move_screen(1, 0); // no shift
579 }
580 else { // no alt
581 if (MOD__SHIFT) drag->selected_move(10*nudge, 0); // shift
582 else drag->selected_move(nudge, 0); // no shift
583 }
584 ret = TRUE;
585 }
586 break;
587 case GDK_Down: // move handle down
588 case GDK_KP_Down:
589 case GDK_KP_2:
590 if (!MOD__CTRL) { // not ctrl
591 if (MOD__ALT) { // alt
592 if (MOD__SHIFT) drag->selected_move_screen(0, -10); // shift
593 else drag->selected_move_screen(0, -1); // no shift
594 }
595 else { // no alt
596 if (MOD__SHIFT) drag->selected_move(0, -10*nudge); // shift
597 else drag->selected_move(0, -nudge); // no shift
598 }
599 ret = TRUE;
600 }
601 break;
602 case GDK_r:
603 case GDK_R:
604 if (MOD__SHIFT_ONLY) {
605 // First try selected dragger
606 if (drag && drag->selected) {
607 drag->selected_reverse_vector();
608 } else { // If no drag or no dragger selected, act on selection (both fill and stroke gradients)
609 for (GSList const* i = selection->itemList(); i != NULL; i = i->next) {
610 sp_item_gradient_reverse_vector (SP_ITEM(i->data), true);
611 sp_item_gradient_reverse_vector (SP_ITEM(i->data), false);
612 }
613 }
614 // we did an undoable action
615 sp_document_done (sp_desktop_document (desktop), SP_VERB_CONTEXT_GRADIENT,
616 _("Invert gradient"));
617 ret = TRUE;
618 }
619 break;
620 /*
621 case GDK_Insert:
622 case GDK_KP_Insert:
623 // with any modifiers
624 sp_node_selected_add_node();
625 ret = TRUE;
626 break;
627 */
628 case GDK_Delete:
629 case GDK_KP_Delete:
630 case GDK_BackSpace:
631 if ( drag->selected ) {
632 drag->deleteSelected(MOD__CTRL_ONLY);
633 ret = TRUE;
634 }
635 break;
636 default:
637 break;
638 }
639 break;
640 case GDK_KEY_RELEASE:
641 switch (get_group0_keyval (&event->key)) {
642 case GDK_Alt_L:
643 case GDK_Alt_R:
644 case GDK_Control_L:
645 case GDK_Control_R:
646 case GDK_Shift_L:
647 case GDK_Shift_R:
648 case GDK_Meta_L: // Meta is when you press Shift+Alt
649 case GDK_Meta_R:
650 event_context->defaultMessageContext()->clear();
651 break;
652 default:
653 break;
654 }
655 break;
656 default:
657 break;
658 }
660 if (!ret) {
661 if (((SPEventContextClass *) parent_class)->root_handler) {
662 ret = ((SPEventContextClass *) parent_class)->root_handler(event_context, event);
663 }
664 }
666 return ret;
667 }
669 static void sp_gradient_drag(SPGradientContext &rc, NR::Point const pt, guint state, guint32 etime)
670 {
671 SPDesktop *desktop = SP_EVENT_CONTEXT(&rc)->desktop;
672 Inkscape::Selection *selection = sp_desktop_selection(desktop);
673 SPDocument *document = sp_desktop_document(desktop);
674 SPEventContext *ec = SP_EVENT_CONTEXT(&rc);
676 if (!selection->isEmpty()) {
677 int type = prefs_get_int_attribute ("tools.gradient", "newgradient", 1);
678 int fill_or_stroke = prefs_get_int_attribute ("tools.gradient", "newfillorstroke", 1);
680 SPGradient *vector;
681 if (ec->item_to_select) {
682 vector = sp_gradient_vector_for_object(document, desktop, ec->item_to_select, fill_or_stroke);
683 } else {
684 vector = sp_gradient_vector_for_object(document, desktop, SP_ITEM(selection->itemList()->data), fill_or_stroke);
685 }
687 // HACK: reset fill-opacity - that 0.75 is annoying; BUT remove this when we have an opacity slider for all tabs
688 SPCSSAttr *css = sp_repr_css_attr_new();
689 sp_repr_css_set_property(css, "fill-opacity", "1.0");
691 for (GSList const *i = selection->itemList(); i != NULL; i = i->next) {
693 //FIXME: see above
694 sp_repr_css_change_recursive(SP_OBJECT_REPR(i->data), css, "style");
696 sp_item_set_gradient(SP_ITEM(i->data), vector, (SPGradientType) type, fill_or_stroke);
698 if (type == SP_GRADIENT_TYPE_LINEAR) {
699 sp_item_gradient_set_coords (SP_ITEM(i->data), POINT_LG_BEGIN, 0, rc.origin, fill_or_stroke, true, false);
700 sp_item_gradient_set_coords (SP_ITEM(i->data), POINT_LG_END, 0, pt, fill_or_stroke, true, false);
701 } else if (type == SP_GRADIENT_TYPE_RADIAL) {
702 sp_item_gradient_set_coords (SP_ITEM(i->data), POINT_RG_CENTER, 0, rc.origin, fill_or_stroke, true, false);
703 sp_item_gradient_set_coords (SP_ITEM(i->data), POINT_RG_R1, 0, pt, fill_or_stroke, true, false);
704 }
705 SP_OBJECT (i->data)->requestModified(SP_OBJECT_MODIFIED_FLAG);
706 }
707 if (ec->_grdrag) {
708 ec->_grdrag->updateDraggers();
709 // prevent regenerating draggers by selection modified signal, which sometimes
710 // comes too late and thus destroys the knot which we will now grab:
711 ec->_grdrag->local_change = true;
712 // give the grab out-of-bounds values of xp/yp because we're already dragging
713 // and therefore are already out of tolerance
714 ec->_grdrag->grabKnot (SP_ITEM(selection->itemList()->data),
715 type == SP_GRADIENT_TYPE_LINEAR? POINT_LG_END : POINT_RG_R1,
716 0, //point_i
717 fill_or_stroke, 99999, 99999, etime);
718 }
719 // We did an undoable action, but sp_document_done will be called by the knot when released
721 // status text; we do not track coords because this branch is run once, not all the time
722 // during drag
723 int n_objects = g_slist_length((GSList *) selection->itemList());
724 rc._message_context->setF(Inkscape::NORMAL_MESSAGE,
725 ngettext("<b>Gradient</b> for %d object; with <b>Ctrl</b> to snap angle",
726 "<b>Gradient</b> for %d objects; with <b>Ctrl</b> to snap angle", n_objects),
727 n_objects);
728 } else {
729 sp_desktop_message_stack(desktop)->flash(Inkscape::WARNING_MESSAGE, _("Select <b>objects</b> on which to create gradient."));
730 }
731 }
734 /*
735 Local Variables:
736 mode:c++
737 c-file-style:"stroustrup"
738 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
739 indent-tabs-mode:nil
740 fill-column:99
741 End:
742 */
743 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :