1 #define __SP_GRADIENT_CONTEXT_C__
3 /*
4 * Gradient drawing and editing tool
5 *
6 * Authors:
7 * bulia byak <buliabyak@users.sf.net>
8 *
9 * Copyright (C) 2005 Authors
10 *
11 * Released under GNU GPL, read the file 'COPYING' for more information
12 */
14 #ifdef HAVE_CONFIG_H
15 # include "config.h"
16 #endif
19 #include <gdk/gdkkeysyms.h>
21 #include "macros.h"
22 #include "document.h"
23 #include "selection.h"
24 #include "desktop.h"
25 #include "desktop-handles.h"
26 #include "message-context.h"
27 #include "message-stack.h"
28 #include "pixmaps/cursor-gradient.xpm"
29 #include "pixmaps/cursor-gradient-add.xpm"
30 #include "pixmaps/cursor-gradient-delete.xpm"
31 #include "gradient-context.h"
32 #include "gradient-chemistry.h"
33 #include <glibmm/i18n.h>
34 #include "prefs-utils.h"
35 #include "gradient-drag.h"
36 #include "gradient-chemistry.h"
37 #include "xml/repr.h"
38 #include "sp-item.h"
39 #include "display/sp-ctrlline.h"
40 #include "sp-linear-gradient.h"
41 #include "sp-radial-gradient.h"
42 #include "sp-stop.h"
43 #include "svg/css-ostringstream.h"
44 #include "svg/svg-color.h"
49 static void sp_gradient_context_class_init(SPGradientContextClass *klass);
50 static void sp_gradient_context_init(SPGradientContext *gr_context);
51 static void sp_gradient_context_dispose(GObject *object);
53 static void sp_gradient_context_setup(SPEventContext *ec);
55 static gint sp_gradient_context_root_handler(SPEventContext *event_context, GdkEvent *event);
57 static void sp_gradient_drag(SPGradientContext &rc, NR::Point const pt, guint state, guint32 etime);
59 static SPEventContextClass *parent_class;
62 GtkType sp_gradient_context_get_type()
63 {
64 static GType type = 0;
65 if (!type) {
66 GTypeInfo info = {
67 sizeof(SPGradientContextClass),
68 NULL, NULL,
69 (GClassInitFunc) sp_gradient_context_class_init,
70 NULL, NULL,
71 sizeof(SPGradientContext),
72 4,
73 (GInstanceInitFunc) sp_gradient_context_init,
74 NULL, /* value_table */
75 };
76 type = g_type_register_static(SP_TYPE_EVENT_CONTEXT, "SPGradientContext", &info, (GTypeFlags) 0);
77 }
78 return type;
79 }
81 static void sp_gradient_context_class_init(SPGradientContextClass *klass)
82 {
83 GObjectClass *object_class = (GObjectClass *) klass;
84 SPEventContextClass *event_context_class = (SPEventContextClass *) klass;
86 parent_class = (SPEventContextClass *) g_type_class_peek_parent(klass);
88 object_class->dispose = sp_gradient_context_dispose;
90 event_context_class->setup = sp_gradient_context_setup;
91 event_context_class->root_handler = sp_gradient_context_root_handler;
92 }
94 static void sp_gradient_context_init(SPGradientContext *gr_context)
95 {
96 SPEventContext *event_context = SP_EVENT_CONTEXT(gr_context);
98 gr_context->cursor_addnode = false;
99 event_context->cursor_shape = cursor_gradient_xpm;
100 event_context->hot_x = 4;
101 event_context->hot_y = 4;
102 event_context->xp = 0;
103 event_context->yp = 0;
104 event_context->tolerance = 4;
105 event_context->within_tolerance = false;
106 event_context->item_to_select = NULL;
107 }
109 static void sp_gradient_context_dispose(GObject *object)
110 {
111 SPGradientContext *rc = SP_GRADIENT_CONTEXT(object);
112 SPEventContext *ec = SP_EVENT_CONTEXT(object);
114 ec->enableGrDrag(false);
116 if (rc->_message_context) {
117 delete rc->_message_context;
118 }
120 G_OBJECT_CLASS(parent_class)->dispose(object);
121 }
123 static void sp_gradient_context_setup(SPEventContext *ec)
124 {
125 SPGradientContext *rc = SP_GRADIENT_CONTEXT(ec);
127 if (((SPEventContextClass *) parent_class)->setup) {
128 ((SPEventContextClass *) parent_class)->setup(ec);
129 }
131 if (prefs_get_int_attribute("tools.gradient", "selcue", 1) != 0) {
132 ec->enableSelectionCue();
133 }
135 ec->enableGrDrag();
137 rc->_message_context = new Inkscape::MessageContext(sp_desktop_message_stack(ec->desktop));
138 }
140 void
141 sp_gradient_context_select_next (SPEventContext *event_context)
142 {
143 GrDrag *drag = event_context->_grdrag;
144 g_assert (drag);
146 drag->select_next();
147 }
149 void
150 sp_gradient_context_select_prev (SPEventContext *event_context)
151 {
152 GrDrag *drag = event_context->_grdrag;
153 g_assert (drag);
155 drag->select_prev();
156 }
158 // FIXME: make global function in libnr or somewhere.
159 static NR::Point
160 snap_vector_midpoint (NR::Point p, NR::Point begin, NR::Point end)
161 {
162 double length = NR::L2(end - begin);
163 NR::Point be = (end - begin) / length;
164 double r = NR::dot(p - begin, be);
166 if (r < 0.0) return begin;
167 if (r > length) return end;
169 return (begin + r * be);
170 }
172 static bool
173 sp_gradient_context_is_over_line (SPGradientContext *rc, SPItem *item, NR::Point event_p)
174 {
175 SPDesktop *desktop = SP_EVENT_CONTEXT (rc)->desktop;
177 //Translate mouse point into proper coord system
178 rc->mousepoint_doc = desktop->w2d(event_p);
180 SPCtrlLine* line = SP_CTRLLINE(item);
182 NR::Point nearest = snap_vector_midpoint (rc->mousepoint_doc, line->s, line->e);
183 NR::Point delta = rc->mousepoint_doc - nearest;
185 double tolerance = (double) SP_EVENT_CONTEXT(rc)->tolerance;
187 bool close = (NR::L2 (delta) < tolerance);
189 return close;
190 }
192 // Fixme : must be able to put this in a general file.
193 static guint32
194 average_color (guint32 c1, guint32 c2, gdouble p = 0.5)
195 {
196 guint32 r = (guint32) (SP_RGBA32_R_U (c1) * (1 - p) + SP_RGBA32_R_U (c2) * p);
197 guint32 g = (guint32) (SP_RGBA32_G_U (c1) * (1 - p) + SP_RGBA32_G_U (c2) * p);
198 guint32 b = (guint32) (SP_RGBA32_B_U (c1) * (1 - p) + SP_RGBA32_B_U (c2) * p);
199 guint32 a = (guint32) (SP_RGBA32_A_U (c1) * (1 - p) + SP_RGBA32_A_U (c2) * p);
201 return SP_RGBA32_U_COMPOSE (r, g, b, a);
202 }
204 static double
205 get_offset_between_points (NR::Point p, NR::Point begin, NR::Point end)
206 {
207 double length = NR::L2(end - begin);
208 NR::Point be = (end - begin) / length;
209 double r = NR::dot(p - begin, be);
211 if (r < 0.0) return 0.0;
212 if (r > length) return 1.0;
214 return (r / length);
215 }
217 static void
218 sp_gradient_context_add_stop_near_point (SPGradientContext *rc, SPItem *item, NR::Point mouse_p, guint32 etime)
219 {
220 // item is the selected item. mouse_p the location in doc coordinates of where to add the stop
222 SPEventContext *ec = SP_EVENT_CONTEXT(rc);
223 double tolerance = (double) ec->tolerance;
225 gfloat offset; // type of SPStop.offset = gfloat
226 SPGradient *gradient;
227 bool fill_or_stroke = true;
228 bool r1_knot = false;
230 bool addknot = false;
231 do {
232 gradient = sp_item_gradient (item, fill_or_stroke);
233 if (SP_IS_LINEARGRADIENT(gradient)) {
234 NR::Point begin = sp_item_gradient_get_coords(item, POINT_LG_BEGIN, 0, fill_or_stroke);
235 NR::Point end = sp_item_gradient_get_coords(item, POINT_LG_END, 0, fill_or_stroke);
237 NR::Point nearest = snap_vector_midpoint (mouse_p, begin, end);
238 NR::Point delta = mouse_p - nearest;
239 if ( NR::L2 (delta) < tolerance ) {
240 // add the knot
241 offset = get_offset_between_points(nearest, begin, end);
242 addknot = true;
243 break; // break out of the while loop: add only one knot
244 }
245 } else if (SP_IS_RADIALGRADIENT(gradient)) {
246 NR::Point begin = sp_item_gradient_get_coords(item, POINT_RG_CENTER, 0, fill_or_stroke);
247 NR::Point end = sp_item_gradient_get_coords(item, POINT_RG_R1, 0, fill_or_stroke);
248 NR::Point nearest = snap_vector_midpoint (mouse_p, begin, end);
249 NR::Point delta = mouse_p - nearest;
250 if ( NR::L2 (delta) < tolerance ) {
251 offset = get_offset_between_points(nearest, begin, end);
252 addknot = true;
253 r1_knot = true;
254 break; // break out of the while loop: add only one knot
255 }
257 end = sp_item_gradient_get_coords(item, POINT_RG_R2, 0, fill_or_stroke);
258 nearest = snap_vector_midpoint (mouse_p, begin, end);
259 delta = mouse_p - nearest;
260 if ( NR::L2 (delta) < tolerance ) {
261 offset = get_offset_between_points(nearest, begin, end);
262 addknot = true;
263 r1_knot = false;
264 break; // break out of the while loop: add only one knot
265 }
266 }
267 fill_or_stroke = !fill_or_stroke;
268 } while (!fill_or_stroke && !addknot) ;
270 if (addknot) {
271 SPGradient *vector = sp_gradient_get_vector (gradient, false);
272 SPStop* prev_stop = sp_first_stop(vector);
273 SPStop* next_stop = sp_next_stop(prev_stop);
274 while ( (next_stop) && (next_stop->offset < offset) ) {
275 prev_stop = next_stop;
276 next_stop = sp_next_stop(next_stop);
277 }
278 if (!next_stop) {
279 // logical error: the endstop should have offset 1 and should always be more than this offset here
280 return;
281 }
283 Inkscape::XML::Node *new_stop_repr = NULL;
284 new_stop_repr = SP_OBJECT_REPR(prev_stop)->duplicate();
285 SP_OBJECT_REPR(vector)->addChild(new_stop_repr, SP_OBJECT_REPR(prev_stop));
287 SPStop *newstop = (SPStop *) SP_OBJECT_DOCUMENT(vector)->getObjectByRepr(new_stop_repr);
288 newstop->offset = offset;
289 sp_repr_set_css_double( SP_OBJECT_REPR(newstop), "offset", (double)offset);
290 guint32 const c1 = sp_stop_get_rgba32(prev_stop);
291 guint32 const c2 = sp_stop_get_rgba32(next_stop);
292 guint32 cnew = average_color (c1, c2, (offset - prev_stop->offset) / (next_stop->offset - prev_stop->offset));
293 Inkscape::CSSOStringStream os;
294 gchar c[64];
295 sp_svg_write_color (c, 64, cnew);
296 gdouble opacity = (gdouble) SP_RGBA32_A_F (cnew);
297 os << "stop-color:" << c << ";stop-opacity:" << opacity <<";";
298 SP_OBJECT_REPR (newstop)->setAttribute("style", os.str().c_str());
301 Inkscape::GC::release(new_stop_repr);
302 sp_document_done (SP_OBJECT_DOCUMENT (vector), SP_VERB_CONTEXT_GRADIENT,
303 _("Add gradient stop"));
305 ec->_grdrag->updateDraggers();
306 sp_gradient_ensure_vector (gradient);
308 if (vector->has_stops) {
309 int i = 0;
310 for ( SPObject *ochild = sp_object_first_child (SP_OBJECT(vector)) ; ochild != NULL ; ochild = SP_OBJECT_NEXT(ochild) ) {
311 if (SP_IS_STOP (ochild)) {
312 if ( SP_STOP(ochild) == newstop ) {
313 break;
314 } else {
315 i++;
316 }
317 }
318 }
319 GrDragger *dragger = NULL;
320 gradient = sp_item_gradient (item, fill_or_stroke);
321 GrPointType pointtype;
322 if (SP_IS_LINEARGRADIENT(gradient)) {
323 dragger = SP_EVENT_CONTEXT(rc)->_grdrag->getDraggerFor (item, POINT_LG_MID, i, fill_or_stroke);
324 pointtype = POINT_LG_MID;
325 } else if (SP_IS_RADIALGRADIENT(gradient)) {
326 dragger = SP_EVENT_CONTEXT(rc)->_grdrag->getDraggerFor (item, r1_knot ? POINT_RG_MID1 : POINT_RG_MID2, i, fill_or_stroke);
327 pointtype = r1_knot ? POINT_RG_MID1 : POINT_RG_MID2;
328 }
329 if (dragger && (etime == 0) ) {
330 ec->_grdrag->setSelected (dragger);
331 } else {
332 ec->_grdrag->grabKnot (item,
333 pointtype,
334 i,
335 fill_or_stroke, 99999, 99999, etime);
336 }
337 ec->_grdrag->local_change = true;
339 }
340 }
341 }
343 static void
344 sp_gradient_context_delete_stops (SPGradientContext *rc, SPItem *item, GrDrag *drag, bool just_one) {
345 GrDragger *draggertemp = (GrDragger*) drag->selected->data;
346 GrDraggable *draggabletemp = (GrDraggable*) draggertemp->draggables->data;
347 SPGradient *gradient = sp_item_gradient (item, draggabletemp->fill_or_stroke);
348 SPGradient *vector = sp_gradient_get_vector (gradient, false);
350 // 2 is the minimum, cannot delete more than that without deleting the whole vector
351 guint num_delete = just_one ? 1 : g_list_length(drag->selected);
352 if (vector->vector.stops.size() >= (2+num_delete) ) {
353 GSList *stoplist = NULL;
354 while (drag->selected) {
355 GrDragger *dragger = (GrDragger*) drag->selected->data;
356 GrDraggable *draggable = (GrDraggable*) dragger->draggables->data;
357 SPStop *selstop = NULL;
358 switch (draggable->point_type) {
359 case POINT_LG_END:
360 case POINT_RG_R1:
361 case POINT_RG_R2:
362 selstop = sp_last_stop(vector);
363 break;
364 default:
365 selstop = sp_get_stop_i(vector, draggable->point_i);
366 break;
367 }
368 if ( !g_slist_find(stoplist, selstop) ) {
369 stoplist = g_slist_append(stoplist, selstop);
370 }
371 drag->selected = g_list_remove(drag->selected, dragger);
372 if ( just_one ) break; // iterate once if just_one is set.
373 }
374 while (stoplist) {
375 SPStop *stop = (SPStop*) stoplist->data;
376 SP_OBJECT_REPR(vector)->removeChild(SP_OBJECT_REPR(stop));
377 stoplist = g_slist_remove(stoplist, stop);
378 }
379 // if we delete first or last stop, move the next/previous to the edge
380 SPStop *first = sp_first_stop (vector);
381 if (first) {
382 if (first->offset != 0) {
383 first->offset = 0;
384 sp_repr_set_css_double (SP_OBJECT_REPR (first), "offset", 0);
385 }
386 }
387 SPStop *last = sp_last_stop (vector);
388 if (last) {
389 if (last->offset != 1) {
390 last->offset = 1;
391 sp_repr_set_css_double (SP_OBJECT_REPR (last), "offset", 1);
392 }
393 }
394 if ( just_one || (num_delete == 1) ) {
395 sp_document_done (SP_OBJECT_DOCUMENT (vector), SP_VERB_CONTEXT_GRADIENT,
396 _("Delete gradient stop"));
397 } else {
398 sp_document_done (SP_OBJECT_DOCUMENT (vector), SP_VERB_CONTEXT_GRADIENT,
399 _("Delete gradient stops"));
400 }
401 } else { // delete the gradient from the object. set fill to unset
402 SPCSSAttr *css = sp_repr_css_attr_new ();
403 if (draggabletemp->fill_or_stroke) {
404 sp_repr_css_unset_property (css, "fill");
405 } else {
406 sp_repr_css_unset_property (css, "stroke");
407 }
408 sp_repr_css_change (SP_OBJECT_REPR (item), css, "style");
409 sp_repr_css_attr_unref (css);
410 sp_document_done (SP_OBJECT_DOCUMENT (vector), SP_VERB_CONTEXT_GRADIENT,
411 _("Remove gradient"));
412 }
413 }
417 static gint
418 sp_gradient_context_root_handler(SPEventContext *event_context, GdkEvent *event)
419 {
420 static bool dragging;
422 SPDesktop *desktop = event_context->desktop;
423 Inkscape::Selection *selection = sp_desktop_selection (desktop);
425 SPGradientContext *rc = SP_GRADIENT_CONTEXT(event_context);
427 event_context->tolerance = prefs_get_int_attribute_limited("options.dragtolerance", "value", 0, 0, 100);
428 double const nudge = prefs_get_double_attribute_limited("options.nudgedistance", "value", 2, 0, 1000); // in px
430 GrDrag *drag = event_context->_grdrag;
431 g_assert (drag);
433 gint ret = FALSE;
434 switch (event->type) {
435 case GDK_2BUTTON_PRESS:
436 if ( event->button.button == 1 ) {
437 bool over_line = false;
438 SPCtrlLine *line = NULL;
439 if (drag->lines) {
440 for (GSList *l = drag->lines; (l != NULL) && (!over_line); l = l->next) {
441 line = (SPCtrlLine*) l->data;
442 over_line |= sp_gradient_context_is_over_line (rc, (SPItem*) line, NR::Point(event->motion.x, event->motion.y));
443 }
444 }
445 if (over_line) {
446 sp_gradient_context_add_stop_near_point(rc, SP_ITEM(selection->itemList()->data), rc->mousepoint_doc, event->button.time);
447 } else {
448 for (GSList const* i = selection->itemList(); i != NULL; i = i->next) {
449 SPItem *item = SP_ITEM(i->data);
450 SPGradientType new_type = (SPGradientType) prefs_get_int_attribute ("tools.gradient", "newgradient", SP_GRADIENT_TYPE_LINEAR);
451 guint new_fill = prefs_get_int_attribute ("tools.gradient", "newfillorstroke", 1);
453 SPGradient *vector = sp_gradient_vector_for_object(sp_desktop_document(desktop), desktop, SP_OBJECT (item), new_fill);
455 SPGradient *priv = sp_item_set_gradient(item, vector, new_type, new_fill);
456 sp_gradient_reset_to_userspace(priv, item);
457 }
459 sp_document_done (sp_desktop_document (desktop), SP_VERB_CONTEXT_GRADIENT,
460 _("Create default gradient"));
461 }
462 ret = TRUE;
463 }
464 break;
465 case GDK_BUTTON_PRESS:
466 if ( event->button.button == 1 ) {
467 NR::Point const button_w(event->button.x, event->button.y);
469 // save drag origin
470 event_context->xp = (gint) button_w[NR::X];
471 event_context->yp = (gint) button_w[NR::Y];
472 event_context->within_tolerance = true;
474 // remember clicked item, disregarding groups, honoring Alt; do nothing with Crtl to
475 // enable Ctrl+doubleclick of exactly the selected item(s)
476 if (!(event->button.state & GDK_CONTROL_MASK))
477 event_context->item_to_select = sp_event_context_find_item (desktop, button_w, event->button.state & GDK_MOD1_MASK, TRUE);
479 dragging = true;
480 /* Position center */
481 NR::Point const button_dt = desktop->w2d(button_w);
482 /* Snap center to nearest magnetic point */
484 rc->origin = button_dt;
486 ret = TRUE;
487 }
488 break;
489 case GDK_MOTION_NOTIFY:
490 if ( dragging
491 && ( event->motion.state & GDK_BUTTON1_MASK ) )
492 {
493 if ( event_context->within_tolerance
494 && ( abs( (gint) event->motion.x - event_context->xp ) < event_context->tolerance )
495 && ( abs( (gint) event->motion.y - event_context->yp ) < event_context->tolerance ) ) {
496 break; // do not drag if we're within tolerance from origin
497 }
498 // Once the user has moved farther than tolerance from the original location
499 // (indicating they intend to draw, not click), then always process the
500 // motion notify coordinates as given (no snapping back to origin)
501 event_context->within_tolerance = false;
503 NR::Point const motion_w(event->motion.x,
504 event->motion.y);
505 NR::Point const motion_dt = event_context->desktop->w2d(motion_w);
507 sp_gradient_drag(*rc, motion_dt, event->motion.state, event->motion.time);
509 ret = TRUE;
510 } else {
511 bool over_line = false;
512 if (drag->lines) {
513 for (GSList *l = drag->lines; l != NULL; l = l->next) {
514 over_line |= sp_gradient_context_is_over_line (rc, (SPItem*) l->data, NR::Point(event->motion.x, event->motion.y));
515 }
516 }
518 if (rc->cursor_addnode && !over_line) {
519 event_context->cursor_shape = cursor_gradient_xpm;
520 sp_event_context_update_cursor(event_context);
521 rc->cursor_addnode = false;
522 } else if (!rc->cursor_addnode && over_line) {
523 event_context->cursor_shape = cursor_gradient_add_xpm;
524 sp_event_context_update_cursor(event_context);
525 rc->cursor_addnode = true;
526 }
527 }
528 break;
529 case GDK_BUTTON_RELEASE:
530 event_context->xp = event_context->yp = 0;
531 if ( event->button.button == 1 ) {
532 if ( (event->button.state & GDK_CONTROL_MASK) && (event->button.state & GDK_MOD1_MASK ) ) {
533 bool over_line = false;
534 SPCtrlLine *line = NULL;
535 if (drag->lines) {
536 for (GSList *l = drag->lines; (l != NULL) && (!over_line); l = l->next) {
537 line = (SPCtrlLine*) l->data;
538 over_line |= sp_gradient_context_is_over_line (rc, (SPItem*) line, NR::Point(event->motion.x, event->motion.y));
539 }
540 }
541 if (over_line) {
542 sp_gradient_context_add_stop_near_point(rc, SP_ITEM(selection->itemList()->data), rc->mousepoint_doc, 0);
543 ret = TRUE;
544 }
545 } else {
546 dragging = false;
548 // unless clicked with Ctrl (to enable Ctrl+doubleclick). (don't what this is for (johan))
549 if (event->button.state & GDK_CONTROL_MASK) {
550 ret = TRUE;
551 break;
552 }
554 if (!event_context->within_tolerance) {
555 // we've been dragging, do nothing (grdrag handles that)
556 } else if (event_context->item_to_select) {
557 // no dragging, select clicked item if any
558 if (event->button.state & GDK_SHIFT_MASK) {
559 selection->toggle(event_context->item_to_select);
560 } else {
561 selection->set(event_context->item_to_select);
562 }
563 } else {
564 // click in an empty space; do the same as Esc
565 if (drag->selected) {
566 drag->deselect_all();
567 } else {
568 selection->clear();
569 }
570 }
572 event_context->item_to_select = NULL;
573 ret = TRUE;
574 }
575 }
576 break;
577 case GDK_KEY_PRESS:
578 switch (get_group0_keyval (&event->key)) {
579 case GDK_Alt_L:
580 case GDK_Alt_R:
581 case GDK_Control_L:
582 case GDK_Control_R:
583 case GDK_Shift_L:
584 case GDK_Shift_R:
585 case GDK_Meta_L: // Meta is when you press Shift+Alt (at least on my machine)
586 case GDK_Meta_R:
587 sp_event_show_modifier_tip (event_context->defaultMessageContext(), event,
588 _("<b>Ctrl</b>: snap gradient angle"),
589 _("<b>Shift</b>: draw gradient around the starting point"),
590 NULL);
591 break;
593 case GDK_x:
594 case GDK_X:
595 if (MOD__ALT_ONLY) {
596 desktop->setToolboxFocusTo ("altx-grad");
597 ret = TRUE;
598 }
599 break;
601 case GDK_Escape:
602 if (drag->selected) {
603 drag->deselect_all();
604 } else {
605 selection->clear();
606 }
607 ret = TRUE;
608 //TODO: make dragging escapable by Esc
609 break;
611 case GDK_Left: // move handle left
612 case GDK_KP_Left:
613 case GDK_KP_4:
614 if (!MOD__CTRL) { // not ctrl
615 if (MOD__ALT) { // alt
616 if (MOD__SHIFT) drag->selected_move_screen(-10, 0); // shift
617 else drag->selected_move_screen(-1, 0); // no shift
618 }
619 else { // no alt
620 if (MOD__SHIFT) drag->selected_move(-10*nudge, 0); // shift
621 else drag->selected_move(-nudge, 0); // no shift
622 }
623 ret = TRUE;
624 }
625 break;
626 case GDK_Up: // move handle up
627 case GDK_KP_Up:
628 case GDK_KP_8:
629 if (!MOD__CTRL) { // not ctrl
630 if (MOD__ALT) { // alt
631 if (MOD__SHIFT) drag->selected_move_screen(0, 10); // shift
632 else drag->selected_move_screen(0, 1); // no shift
633 }
634 else { // no alt
635 if (MOD__SHIFT) drag->selected_move(0, 10*nudge); // shift
636 else drag->selected_move(0, nudge); // no shift
637 }
638 ret = TRUE;
639 }
640 break;
641 case GDK_Right: // move handle right
642 case GDK_KP_Right:
643 case GDK_KP_6:
644 if (!MOD__CTRL) { // not ctrl
645 if (MOD__ALT) { // alt
646 if (MOD__SHIFT) drag->selected_move_screen(10, 0); // shift
647 else drag->selected_move_screen(1, 0); // no shift
648 }
649 else { // no alt
650 if (MOD__SHIFT) drag->selected_move(10*nudge, 0); // shift
651 else drag->selected_move(nudge, 0); // no shift
652 }
653 ret = TRUE;
654 }
655 break;
656 case GDK_Down: // move handle down
657 case GDK_KP_Down:
658 case GDK_KP_2:
659 if (!MOD__CTRL) { // not ctrl
660 if (MOD__ALT) { // alt
661 if (MOD__SHIFT) drag->selected_move_screen(0, -10); // shift
662 else drag->selected_move_screen(0, -1); // no shift
663 }
664 else { // no alt
665 if (MOD__SHIFT) drag->selected_move(0, -10*nudge); // shift
666 else drag->selected_move(0, -nudge); // no shift
667 }
668 ret = TRUE;
669 }
670 break;
671 case GDK_r:
672 case GDK_R:
673 if (MOD__SHIFT_ONLY) {
674 // First try selected dragger
675 if (drag && drag->selected) {
676 drag->selected_reverse_vector();
677 } else { // If no drag or no dragger selected, act on selection (both fill and stroke gradients)
678 for (GSList const* i = selection->itemList(); i != NULL; i = i->next) {
679 sp_item_gradient_reverse_vector (SP_ITEM(i->data), true);
680 sp_item_gradient_reverse_vector (SP_ITEM(i->data), false);
681 }
682 }
683 // we did an undoable action
684 sp_document_done (sp_desktop_document (desktop), SP_VERB_CONTEXT_GRADIENT,
685 _("Invert gradient"));
686 ret = TRUE;
687 }
688 break;
689 /*
690 case GDK_Insert:
691 case GDK_KP_Insert:
692 // with any modifiers
693 sp_node_selected_add_node();
694 ret = TRUE;
695 break;
696 */
697 case GDK_Delete:
698 case GDK_KP_Delete:
699 case GDK_BackSpace:
700 if ( drag->selected ) {
701 sp_gradient_context_delete_stops ( rc, SP_ITEM(selection->itemList()->data), drag, MOD__CTRL_ONLY ) ;
702 ret = TRUE;
703 }
704 break;
705 default:
706 break;
707 }
708 break;
709 case GDK_KEY_RELEASE:
710 switch (get_group0_keyval (&event->key)) {
711 case GDK_Alt_L:
712 case GDK_Alt_R:
713 case GDK_Control_L:
714 case GDK_Control_R:
715 case GDK_Shift_L:
716 case GDK_Shift_R:
717 case GDK_Meta_L: // Meta is when you press Shift+Alt
718 case GDK_Meta_R:
719 event_context->defaultMessageContext()->clear();
720 break;
721 default:
722 break;
723 }
724 break;
725 default:
726 break;
727 }
729 if (!ret) {
730 if (((SPEventContextClass *) parent_class)->root_handler) {
731 ret = ((SPEventContextClass *) parent_class)->root_handler(event_context, event);
732 }
733 }
735 return ret;
736 }
738 static void sp_gradient_drag(SPGradientContext &rc, NR::Point const pt, guint state, guint32 etime)
739 {
740 SPDesktop *desktop = SP_EVENT_CONTEXT(&rc)->desktop;
741 Inkscape::Selection *selection = sp_desktop_selection(desktop);
742 SPDocument *document = sp_desktop_document(desktop);
743 SPEventContext *ec = SP_EVENT_CONTEXT(&rc);
745 if (!selection->isEmpty()) {
746 int type = prefs_get_int_attribute ("tools.gradient", "newgradient", 1);
747 int fill_or_stroke = prefs_get_int_attribute ("tools.gradient", "newfillorstroke", 1);
749 SPGradient *vector;
750 if (ec->item_to_select) {
751 vector = sp_gradient_vector_for_object(document, desktop, ec->item_to_select, fill_or_stroke);
752 } else {
753 vector = sp_gradient_vector_for_object(document, desktop, SP_ITEM(selection->itemList()->data), fill_or_stroke);
754 }
756 // HACK: reset fill-opacity - that 0.75 is annoying; BUT remove this when we have an opacity slider for all tabs
757 SPCSSAttr *css = sp_repr_css_attr_new();
758 sp_repr_css_set_property(css, "fill-opacity", "1.0");
760 for (GSList const *i = selection->itemList(); i != NULL; i = i->next) {
762 //FIXME: see above
763 sp_repr_css_change_recursive(SP_OBJECT_REPR(i->data), css, "style");
765 sp_item_set_gradient(SP_ITEM(i->data), vector, (SPGradientType) type, fill_or_stroke);
767 if (type == SP_GRADIENT_TYPE_LINEAR) {
768 sp_item_gradient_set_coords (SP_ITEM(i->data), POINT_LG_BEGIN, 0, rc.origin, fill_or_stroke, true, false);
769 sp_item_gradient_set_coords (SP_ITEM(i->data), POINT_LG_END, 0, pt, fill_or_stroke, true, false);
770 } else if (type == SP_GRADIENT_TYPE_RADIAL) {
771 sp_item_gradient_set_coords (SP_ITEM(i->data), POINT_RG_CENTER, 0, rc.origin, fill_or_stroke, true, false);
772 sp_item_gradient_set_coords (SP_ITEM(i->data), POINT_RG_R1, 0, pt, fill_or_stroke, true, false);
773 }
774 SP_OBJECT (i->data)->requestModified(SP_OBJECT_MODIFIED_FLAG);
775 }
776 if (ec->_grdrag) {
777 ec->_grdrag->updateDraggers();
778 // prevent regenerating draggers by selection modified signal, which sometimes
779 // comes too late and thus destroys the knot which we will now grab:
780 ec->_grdrag->local_change = true;
781 // give the grab out-of-bounds values of xp/yp because we're already dragging
782 // and therefore are already out of tolerance
783 ec->_grdrag->grabKnot (SP_ITEM(selection->itemList()->data),
784 type == SP_GRADIENT_TYPE_LINEAR? POINT_LG_END : POINT_RG_R1,
785 0, //point_i
786 fill_or_stroke, 99999, 99999, etime);
787 }
788 // We did an undoable action, but sp_document_done will be called by the knot when released
790 // status text; we do not track coords because this branch is run once, not all the time
791 // during drag
792 int n_objects = g_slist_length((GSList *) selection->itemList());
793 rc._message_context->setF(Inkscape::NORMAL_MESSAGE,
794 ngettext("<b>Gradient</b> for %d object; with <b>Ctrl</b> to snap angle",
795 "<b>Gradient</b> for %d objects; with <b>Ctrl</b> to snap angle", n_objects),
796 n_objects);
797 } else {
798 sp_desktop_message_stack(desktop)->flash(Inkscape::WARNING_MESSAGE, _("Select <b>objects</b> on which to create gradient."));
799 }
800 }
803 /*
804 Local Variables:
805 mode:c++
806 c-file-style:"stroustrup"
807 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
808 indent-tabs-mode:nil
809 fill-column:99
810 End:
811 */
812 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :