79872536351f4f6e9f9ce72dc2f5bc7591298830
1 /*
2 * Connector creation tool
3 *
4 * Authors:
5 * Michael Wybrow <mjwybrow@users.sourceforge.net>
6 *
7 * Copyright (C) 2005 Michael Wybrow
8 *
9 * Released under GNU GPL, read the file 'COPYING' for more information
10 *
11 * TODO:
12 * o Have shapes avoid coonvex hulls of objects, rather than their
13 * bounding box. Possibly implement the unfinished ConvexHull
14 * class in libnr.
15 * (HOWEVER, using the convex hull C of a shape S does the wrong thing if a
16 * connector starts outside of S but inside C, or if the best route around
17 * an object involves going inside C but without entering S.)
18 * o Draw connectors to shape edges rather than bounding box.
19 * o Show a visual indicator for objects with the 'avoid' property set.
20 * o Create an interface for setting markers (arrow heads).
21 * o Better distinguish between paths and connectors to prevent problems
22 * in the node tool and paths accidently being turned into connectors
23 * in the connector tool. Perhaps have a way to convert between.
24 * o Only call libavoid's updateEndPoint as required. Currently we do it
25 * for both endpoints, even if only one is moving.
26 * o Cleanup to remove unecessary borrowed DrawContext code.
27 * o Allow user-placeable connection points.
28 * o Deal sanely with connectors with both endpoints attached to the
29 * same connection point, and drawing of connectors attaching
30 * overlaping shapes (currently tries to adjust connector to be
31 * outside both bounding boxes).
32 * o Fix many special cases related to connectors updating,
33 * e.g., copying a couple of shapes and a connector that are
34 * attached to each other.
35 * e.g., detach connector when it is moved or transformed in
36 * one of the other contexts.
37 * o Cope with shapes whose ids change when they have attached
38 * connectors.
39 * o gobble_motion_events(GDK_BUTTON1_MASK)?;
40 *
41 */
43 #include <gdk/gdkkeysyms.h>
45 #include "connector-context.h"
46 #include "pixmaps/cursor-connector.xpm"
47 #include "xml/node-event-vector.h"
48 #include "xml/repr.h"
49 #include "svg/svg.h"
50 #include "desktop.h"
51 #include "desktop-style.h"
52 #include "desktop-affine.h"
53 #include "desktop-handles.h"
54 #include "document.h"
55 #include "message-context.h"
56 #include "message-stack.h"
57 #include "selection.h"
58 #include "inkscape.h"
59 #include "prefs-utils.h"
60 #include "sp-path.h"
61 #include "display/canvas-bpath.h"
62 #include "display/sodipodi-ctrl.h"
63 #include <glibmm/i18n.h>
64 #include "snap.h"
65 #include "knot.h"
66 #include "sp-conn-end.h"
67 #include "conn-avoid-ref.h"
68 #include "libavoid/vertices.h"
69 #include "context-fns.h"
70 #include "sp-namedview.h"
72 static void sp_connector_context_class_init(SPConnectorContextClass *klass);
73 static void sp_connector_context_init(SPConnectorContext *conn_context);
74 static void sp_connector_context_dispose(GObject *object);
76 static void sp_connector_context_setup(SPEventContext *ec);
77 static void sp_connector_context_finish(SPEventContext *ec);
78 static gint sp_connector_context_root_handler(SPEventContext *ec, GdkEvent *event);
79 static gint sp_connector_context_item_handler(SPEventContext *event_context, SPItem *item, GdkEvent *event);
81 // Stuff borrowed from DrawContext
82 static void spcc_connector_set_initial_point(SPConnectorContext *cc, NR::Point const p);
83 static void spcc_connector_set_subsequent_point(SPConnectorContext *cc, NR::Point const p);
84 static void spcc_connector_finish_segment(SPConnectorContext *cc, NR::Point p);
85 static void spcc_reset_colors(SPConnectorContext *cc);
86 static void spcc_connector_finish(SPConnectorContext *cc);
87 static void spcc_concat_colors_and_flush(SPConnectorContext *cc);
88 static void spcc_flush_white(SPConnectorContext *cc, SPCurve *gc);
90 // Context event handlers
91 static gint connector_handle_button_press(SPConnectorContext *const cc, GdkEventButton const &bevent);
92 static gint connector_handle_motion_notify(SPConnectorContext *const cc, GdkEventMotion const &mevent);
93 static gint connector_handle_button_release(SPConnectorContext *const cc, GdkEventButton const &revent);
94 static gint connector_handle_key_press(SPConnectorContext *const cc, guint const keyval);
96 static void cc_set_active_shape(SPConnectorContext *cc, SPItem *item);
97 static void cc_clear_active_shape(SPConnectorContext *cc);
98 static void cc_set_active_conn(SPConnectorContext *cc, SPItem *item);
99 static void cc_clear_active_conn(SPConnectorContext *cc);
100 static gchar *conn_pt_handle_test(SPConnectorContext *cc, NR::Point& w);
101 static bool cc_item_is_shape(SPItem *item);
102 static void cc_selection_changed(Inkscape::Selection *selection, gpointer data);
104 static void shape_event_attr_deleted(Inkscape::XML::Node *repr,
105 Inkscape::XML::Node *child, Inkscape::XML::Node *ref, gpointer data);
106 static void shape_event_attr_changed(Inkscape::XML::Node *repr, gchar const *name,
107 gchar const *old_value, gchar const *new_value, bool is_interactive,
108 gpointer data);
111 static NR::Point connector_drag_origin_w(0, 0);
112 static bool connector_within_tolerance = false;
113 static SPEventContextClass *parent_class;
116 static Inkscape::XML::NodeEventVector shape_repr_events = {
117 NULL, /* child_added */
118 NULL, /* child_added */
119 shape_event_attr_changed,
120 NULL, /* content_changed */
121 NULL /* order_changed */
122 };
124 static Inkscape::XML::NodeEventVector layer_repr_events = {
125 NULL, /* child_added */
126 shape_event_attr_deleted,
127 NULL, /* child_added */
128 NULL, /* content_changed */
129 NULL /* order_changed */
130 };
133 GType
134 sp_connector_context_get_type(void)
135 {
136 static GType type = 0;
137 if (!type) {
138 GTypeInfo info = {
139 sizeof(SPConnectorContextClass),
140 NULL, NULL,
141 (GClassInitFunc) sp_connector_context_class_init,
142 NULL, NULL,
143 sizeof(SPConnectorContext),
144 4,
145 (GInstanceInitFunc) sp_connector_context_init,
146 NULL, /* value_table */
147 };
148 type = g_type_register_static(SP_TYPE_EVENT_CONTEXT, "SPConnectorContext", &info, (GTypeFlags)0);
149 }
150 return type;
151 }
153 static void
154 sp_connector_context_class_init(SPConnectorContextClass *klass)
155 {
156 GObjectClass *object_class;
157 SPEventContextClass *event_context_class;
159 object_class = (GObjectClass *) klass;
160 event_context_class = (SPEventContextClass *) klass;
162 parent_class = (SPEventContextClass*)g_type_class_peek_parent(klass);
164 object_class->dispose = sp_connector_context_dispose;
166 event_context_class->setup = sp_connector_context_setup;
167 event_context_class->finish = sp_connector_context_finish;
168 event_context_class->root_handler = sp_connector_context_root_handler;
169 event_context_class->item_handler = sp_connector_context_item_handler;
170 }
173 static void
174 sp_connector_context_init(SPConnectorContext *cc)
175 {
176 SPEventContext *ec = SP_EVENT_CONTEXT(cc);
178 ec->cursor_shape = cursor_connector_xpm;
179 ec->hot_x = 1;
180 ec->hot_y = 1;
181 ec->xp = 0;
182 ec->yp = 0;
184 cc->red_color = 0xff00007f;
186 cc->newconn = NULL;
187 cc->newConnRef = NULL;
189 cc->sel_changed_connection = sigc::connection();
191 cc->active_shape = NULL;
192 cc->active_shape_repr = NULL;
193 cc->active_shape_layer_repr = NULL;
195 cc->active_conn = NULL;
196 cc->active_conn_repr = NULL;
198 cc->active_handle = NULL;
200 cc->clickeditem = NULL;
201 cc->clickedhandle = NULL;
203 cc->connpthandle = NULL;
204 for (int i = 0; i < 2; ++i) {
205 cc->endpt_handle[i] = NULL;
206 cc->endpt_handler_id[i] = 0;
207 }
208 cc->sid = NULL;
209 cc->eid = NULL;
210 cc->npoints = 0;
211 cc->state = SP_CONNECTOR_CONTEXT_IDLE;
212 }
215 static void
216 sp_connector_context_dispose(GObject *object)
217 {
218 SPConnectorContext *cc = SP_CONNECTOR_CONTEXT(object);
220 cc->sel_changed_connection.disconnect();
222 if (cc->connpthandle) {
223 g_object_unref(cc->connpthandle);
224 cc->connpthandle = NULL;
225 }
226 for (int i = 0; i < 2; ++i) {
227 if (cc->endpt_handle[1]) {
228 g_object_unref(cc->endpt_handle[i]);
229 cc->endpt_handle[i] = NULL;
230 }
231 }
232 if (cc->sid) {
233 g_free(cc->sid);
234 cc->sid = NULL;
235 }
236 if (cc->eid) {
237 g_free(cc->eid);
238 cc->eid = NULL;
239 }
240 g_assert( cc->newConnRef == NULL );
242 G_OBJECT_CLASS(parent_class)->dispose(object);
243 }
246 static void
247 sp_connector_context_setup(SPEventContext *ec)
248 {
249 SPConnectorContext *cc = SP_CONNECTOR_CONTEXT(ec);
250 SPDesktop *dt = ec->desktop;
252 if (((SPEventContextClass *) parent_class)->setup) {
253 ((SPEventContextClass *) parent_class)->setup(ec);
254 }
256 cc->selection = sp_desktop_selection(dt);
258 cc->sel_changed_connection.disconnect();
259 cc->sel_changed_connection = cc->selection->connectChanged(
260 sigc::bind(sigc::ptr_fun(&cc_selection_changed),
261 (gpointer) cc));
263 /* Create red bpath */
264 cc->red_bpath = sp_canvas_bpath_new(sp_desktop_sketch(ec->desktop), NULL);
265 sp_canvas_bpath_set_stroke(SP_CANVAS_BPATH(cc->red_bpath), cc->red_color,
266 1.0, SP_STROKE_LINEJOIN_MITER, SP_STROKE_LINECAP_BUTT);
267 sp_canvas_bpath_set_fill(SP_CANVAS_BPATH(cc->red_bpath), 0x00000000,
268 SP_WIND_RULE_NONZERO);
269 /* Create red curve */
270 cc->red_curve = sp_curve_new_sized(4);
272 /* Create green curve */
273 cc->green_curve = sp_curve_new_sized(64);
275 // Notice the initial selection.
276 cc_selection_changed(cc->selection, (gpointer) cc);
278 if (prefs_get_int_attribute("tools.connector", "selcue", 0) != 0) {
279 ec->enableSelectionCue();
280 }
282 // Make sure we see all enter events for canvas items,
283 // even if a mouse button is depressed.
284 dt->canvas->gen_all_enter_events = true;
285 }
288 static void
289 sp_connector_context_finish(SPEventContext *ec)
290 {
291 SPConnectorContext *cc = SP_CONNECTOR_CONTEXT(ec);
293 spcc_connector_finish(cc);
295 if (((SPEventContextClass *) parent_class)->finish) {
296 ((SPEventContextClass *) parent_class)->finish(ec);
297 }
299 if (cc->selection) {
300 cc->selection = NULL;
301 }
302 cc_clear_active_shape(cc);
303 cc_clear_active_conn(cc);
305 // Restore the default event generating behaviour.
306 SPDesktop *desktop = SP_EVENT_CONTEXT_DESKTOP(ec);
307 desktop->canvas->gen_all_enter_events = false;
308 }
311 //-----------------------------------------------------------------------------
314 static void
315 cc_clear_active_shape(SPConnectorContext *cc)
316 {
317 if (cc->active_shape == NULL) {
318 return;
319 }
320 g_assert( cc->active_shape_repr );
321 g_assert( cc->active_shape_layer_repr );
323 cc->active_shape = NULL;
325 if (cc->active_shape_repr) {
326 sp_repr_remove_listener_by_data(cc->active_shape_repr, cc);
327 Inkscape::GC::release(cc->active_shape_repr);
328 cc->active_shape_repr = NULL;
330 sp_repr_remove_listener_by_data(cc->active_shape_layer_repr, cc);
331 Inkscape::GC::release(cc->active_shape_layer_repr);
332 cc->active_shape_layer_repr = NULL;
333 }
335 // Hide the center connection point if it exists.
336 if (cc->connpthandle) {
337 sp_knot_hide(cc->connpthandle);
338 }
339 }
342 static void
343 cc_clear_active_conn(SPConnectorContext *cc)
344 {
345 if (cc->active_conn == NULL) {
346 return;
347 }
348 g_assert( cc->active_conn_repr );
350 cc->active_conn = NULL;
352 if (cc->active_conn_repr) {
353 sp_repr_remove_listener_by_data(cc->active_conn_repr, cc);
354 Inkscape::GC::release(cc->active_conn_repr);
355 cc->active_conn_repr = NULL;
356 }
358 // Hide the endpoint handles.
359 for (int i = 0; i < 2; ++i) {
360 if (cc->endpt_handle[i]) {
361 sp_knot_hide(cc->endpt_handle[i]);
362 }
363 }
364 }
367 static gchar *
368 conn_pt_handle_test(SPConnectorContext *cc, NR::Point& p)
369 {
370 // TODO: this will need to change when there are more connection
371 // points available for each shape.
373 SPKnot *centerpt = cc->connpthandle;
374 if (cc->active_handle && (cc->active_handle == centerpt))
375 {
376 p = centerpt->pos;
377 return g_strdup_printf("#%s", SP_OBJECT_ID(cc->active_shape));
378 }
379 return NULL;
380 }
384 static gint
385 sp_connector_context_item_handler(SPEventContext *ec, SPItem *item, GdkEvent *event)
386 {
387 gint ret = FALSE;
389 SPDesktop *desktop = ec->desktop;
391 SPConnectorContext *cc = SP_CONNECTOR_CONTEXT(ec);
393 NR::Point p(event->button.x, event->button.y);
395 switch (event->type) {
396 case GDK_BUTTON_RELEASE:
397 if (event->button.button == 1) {
398 if ((cc->state == SP_CONNECTOR_CONTEXT_DRAGGING) &&
399 (connector_within_tolerance))
400 {
401 spcc_reset_colors(cc);
402 cc->state = SP_CONNECTOR_CONTEXT_IDLE;
403 }
404 if (cc->state != SP_CONNECTOR_CONTEXT_IDLE) {
405 // Doing simething else like rerouting.
406 break;
407 }
408 // find out clicked item, disregarding groups, honoring Alt
409 SPItem *item_ungrouped = sp_event_context_find_item(desktop,
410 p, event->button.state & GDK_MOD1_MASK, TRUE);
412 if (event->button.state & GDK_SHIFT_MASK) {
413 cc->selection->toggle(item_ungrouped);
414 } else {
415 cc->selection->set(item_ungrouped);
416 }
417 ret = TRUE;
418 }
419 break;
420 case GDK_ENTER_NOTIFY:
421 {
422 if (cc_item_is_shape(item)) {
423 // This is a shape, so show connection point(s).
424 if (!(cc->active_shape) ||
425 // Don't show handle for another handle.
426 (item != ((SPItem *) cc->connpthandle))) {
427 cc_set_active_shape(cc, item);
428 }
429 }
430 ret = TRUE;
431 break;
432 }
433 default:
434 break;
435 }
437 return ret;
438 }
441 gint
442 sp_connector_context_root_handler(SPEventContext *ec, GdkEvent *event)
443 {
444 SPConnectorContext *const cc = SP_CONNECTOR_CONTEXT(ec);
446 gint ret = FALSE;
448 switch (event->type) {
449 case GDK_BUTTON_PRESS:
450 ret = connector_handle_button_press(cc, event->button);
451 break;
453 case GDK_MOTION_NOTIFY:
454 ret = connector_handle_motion_notify(cc, event->motion);
455 break;
457 case GDK_BUTTON_RELEASE:
458 ret = connector_handle_button_release(cc, event->button);
459 break;
460 case GDK_KEY_PRESS:
461 ret = connector_handle_key_press(cc, get_group0_keyval (&event->key));
462 break;
464 default:
465 break;
466 }
468 if (!ret) {
469 gint (*const parent_root_handler)(SPEventContext *, GdkEvent *)
470 = ((SPEventContextClass *) parent_class)->root_handler;
471 if (parent_root_handler) {
472 ret = parent_root_handler(ec, event);
473 }
474 }
476 return ret;
477 }
480 static gint
481 connector_handle_button_press(SPConnectorContext *const cc, GdkEventButton const &bevent)
482 {
483 NR::Point const event_w(bevent.x, bevent.y);
484 /* Find desktop coordinates */
485 NR::Point p = cc->desktop->w2d(event_w);
487 gint ret = FALSE;
488 if ( bevent.button == 1 ) {
490 SPDesktop *desktop = SP_EVENT_CONTEXT_DESKTOP(cc);
492 if (Inkscape::have_viable_layer(desktop, cc->_message_context) == false) {
493 return TRUE;
494 }
496 NR::Point const event_w(bevent.x,
497 bevent.y);
498 connector_drag_origin_w = event_w;
499 connector_within_tolerance = true;
501 NR::Point const event_dt = cc->desktop->w2d(event_w);
502 switch (cc->state) {
503 case SP_CONNECTOR_CONTEXT_STOP:
504 /* This is allowed, if we just cancelled curve */
505 case SP_CONNECTOR_CONTEXT_IDLE:
506 {
507 if ( cc->npoints == 0 ) {
508 /* Set start anchor */
509 NR::Point p;
511 cc_clear_active_conn(cc);
513 SP_EVENT_CONTEXT_DESKTOP(cc)->messageStack()->flash(Inkscape::NORMAL_MESSAGE, _("Creating new connector"));
515 /* Create green anchor */
516 p = event_dt;
518 // Test whether we clicked on a connection point
519 cc->sid = conn_pt_handle_test(cc, p);
521 if (!cc->sid) {
522 // This is the first point, so just snap it to the grid
523 // as there's no other points to go off.
524 SnapManager const &m = cc->desktop->namedview->snap_manager;
525 p = m.freeSnap(Inkscape::Snapper::SNAP_POINT | Inkscape::Snapper::BBOX_POINT,
526 p, NULL).getPoint();
527 }
528 spcc_connector_set_initial_point(cc, p);
530 }
531 cc->state = SP_CONNECTOR_CONTEXT_DRAGGING;
532 ret = TRUE;
533 break;
534 }
535 case SP_CONNECTOR_CONTEXT_DRAGGING:
536 {
537 // This is the second click of a connector creation.
539 spcc_connector_set_subsequent_point(cc, p);
540 spcc_connector_finish_segment(cc, p);
541 // Test whether we clicked on a connection point
542 cc->eid = conn_pt_handle_test(cc, p);
543 if (cc->npoints != 0) {
544 spcc_connector_finish(cc);
545 }
546 cc_set_active_conn(cc, cc->newconn);
547 cc->state = SP_CONNECTOR_CONTEXT_IDLE;
548 ret = TRUE;
549 break;
550 }
551 case SP_CONNECTOR_CONTEXT_CLOSE:
552 {
553 g_warning("Button down in CLOSE state");
554 break;
555 }
556 default:
557 break;
558 }
559 } else if (bevent.button == 3) {
560 if (cc->npoints != 0) {
561 spcc_connector_finish(cc);
562 ret = TRUE;
563 }
564 }
565 return ret;
566 }
569 static gint
570 connector_handle_motion_notify(SPConnectorContext *const cc, GdkEventMotion const &mevent)
571 {
572 gint ret = FALSE;
574 if (mevent.state & GDK_BUTTON2_MASK || mevent.state & GDK_BUTTON3_MASK) {
575 // allow middle-button scrolling
576 return FALSE;
577 }
579 NR::Point const event_w(mevent.x, mevent.y);
581 if (connector_within_tolerance) {
582 gint const tolerance = prefs_get_int_attribute_limited("options.dragtolerance",
583 "value", 0, 0, 100);
584 if ( NR::LInfty( event_w - connector_drag_origin_w ) < tolerance ) {
585 return FALSE; // Do not drag if we're within tolerance from origin.
586 }
587 }
588 // Once the user has moved farther than tolerance from the original location
589 // (indicating they intend to move the object, not click), then always process
590 // the motion notify coordinates as given (no snapping back to origin)
591 connector_within_tolerance = false;
593 SPDesktop *const dt = cc->desktop;
595 /* Find desktop coordinates */
596 NR::Point p = dt->w2d(event_w);
598 switch (cc->state) {
599 case SP_CONNECTOR_CONTEXT_DRAGGING:
600 {
601 // This is movement during a connector creation.
603 if ( cc->npoints > 0 ) {
604 cc->selection->clear();
605 spcc_connector_set_subsequent_point(cc, p);
606 ret = TRUE;
607 }
608 break;
609 }
610 case SP_CONNECTOR_CONTEXT_REROUTING:
611 {
612 g_assert( SP_IS_PATH(cc->clickeditem));
614 // Update the hidden path
615 NR::Matrix i2d = sp_item_i2d_affine(cc->clickeditem);
616 NR::Matrix d2i = i2d.inverse();
617 SPPath *path = SP_PATH(cc->clickeditem);
618 SPCurve *curve = (SP_SHAPE(path))->curve;
619 if (cc->clickedhandle == cc->endpt_handle[0]) {
620 NR::Point o = cc->endpt_handle[1]->pos;
621 sp_curve_stretch_endpoints(curve, p * d2i, o * d2i);
622 }
623 else {
624 NR::Point o = cc->endpt_handle[0]->pos;
625 sp_curve_stretch_endpoints(curve, o * d2i, p * d2i);
626 }
627 sp_conn_adjust_path(path);
629 // Copy this to the temporary visible path
630 cc->red_curve = sp_curve_copy(SP_SHAPE(path)->curve);
631 sp_curve_transform(cc->red_curve, i2d);
633 sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(cc->red_bpath), cc->red_curve);
634 ret = TRUE;
635 break;
636 }
637 case SP_CONNECTOR_CONTEXT_STOP:
638 /* This is perfectly valid */
639 break;
640 default:
641 break;
642 }
644 return ret;
645 }
648 static gint
649 connector_handle_button_release(SPConnectorContext *const cc, GdkEventButton const &revent)
650 {
651 gint ret = FALSE;
652 if ( revent.button == 1 ) {
654 SPDesktop *desktop = SP_EVENT_CONTEXT_DESKTOP(cc);
655 SPDocument *doc = sp_desktop_document(desktop);
657 NR::Point const event_w(revent.x, revent.y);
659 /* Find desktop coordinates */
660 NR::Point p = cc->desktop->w2d(event_w);
662 switch (cc->state) {
663 //case SP_CONNECTOR_CONTEXT_POINT:
664 case SP_CONNECTOR_CONTEXT_DRAGGING:
665 {
666 if (connector_within_tolerance)
667 {
668 spcc_connector_finish_segment(cc, p);
669 return TRUE;
670 }
671 // Connector has been created via a drag, end it now.
672 spcc_connector_set_subsequent_point(cc, p);
673 spcc_connector_finish_segment(cc, p);
674 // Test whether we clicked on a connection point
675 cc->eid = conn_pt_handle_test(cc, p);
676 if (cc->npoints != 0) {
677 spcc_connector_finish(cc);
678 }
679 cc_set_active_conn(cc, cc->newconn);
680 cc->state = SP_CONNECTOR_CONTEXT_IDLE;
681 break;
682 }
683 case SP_CONNECTOR_CONTEXT_REROUTING:
684 {
685 // Clear the temporary path:
686 sp_curve_reset(cc->red_curve);
687 sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(cc->red_bpath), NULL);
689 // Test whether we clicked on a connection point
690 gchar *shape_label = conn_pt_handle_test(cc, p);
692 if (shape_label) {
693 if (cc->clickedhandle == cc->endpt_handle[0]) {
694 sp_object_setAttribute(cc->clickeditem,
695 "inkscape:connection-start",shape_label, false);
696 }
697 else {
698 sp_object_setAttribute(cc->clickeditem,
699 "inkscape:connection-end",shape_label, false);
700 }
701 g_free(shape_label);
702 }
703 cc->clickeditem->setHidden(false);
704 sp_conn_adjust_path(SP_PATH(cc->clickeditem));
705 cc->clickeditem->updateRepr();
706 sp_document_done(doc);
707 cc_set_active_conn(cc, cc->clickeditem);
708 sp_document_ensure_up_to_date(doc);
709 cc->state = SP_CONNECTOR_CONTEXT_IDLE;
710 return TRUE;
711 break;
712 }
713 case SP_CONNECTOR_CONTEXT_STOP:
714 /* This is allowed, if we just cancelled curve */
715 break;
716 default:
717 break;
718 }
719 ret = TRUE;
720 }
722 return ret;
723 }
726 static gint
727 connector_handle_key_press(SPConnectorContext *const cc, guint const keyval)
728 {
729 gint ret = FALSE;
730 /* fixme: */
731 switch (keyval) {
732 case GDK_Return:
733 case GDK_KP_Enter:
734 if (cc->npoints != 0) {
735 spcc_connector_finish(cc);
736 ret = TRUE;
737 }
738 break;
739 case GDK_Escape:
740 if (cc->npoints != 0) {
741 // if drawing, cancel, otherwise pass it up for deselecting
742 cc->state = SP_CONNECTOR_CONTEXT_STOP;
743 spcc_reset_colors(cc);
744 ret = TRUE;
745 }
746 break;
747 default:
748 break;
749 }
750 return ret;
751 }
754 static void
755 spcc_reset_colors(SPConnectorContext *cc)
756 {
757 /* Red */
758 sp_curve_reset(cc->red_curve);
759 sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(cc->red_bpath), NULL);
761 sp_curve_reset(cc->green_curve);
762 cc->npoints = 0;
763 }
766 static void
767 spcc_connector_set_initial_point(SPConnectorContext *const cc, NR::Point const p)
768 {
769 g_assert( cc->npoints == 0 );
771 cc->p[0] = p;
772 cc->p[1] = p;
773 cc->npoints = 2;
774 sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(cc->red_bpath), NULL);
775 }
778 static void
779 spcc_connector_set_subsequent_point(SPConnectorContext *const cc, NR::Point const p)
780 {
781 g_assert( cc->npoints != 0 );
783 SPDesktop *dt = cc->desktop;
784 NR::Point o = dt->dt2doc(cc->p[0]);
785 NR::Point d = dt->dt2doc(p);
786 Avoid::Point src = { o[NR::X], o[NR::Y] };
787 Avoid::Point dst = { d[NR::X], d[NR::Y] };
789 if (!cc->newConnRef) {
790 Avoid::Router *router = sp_desktop_document(dt)->router;
791 cc->newConnRef = new Avoid::ConnRef(router, 0, src, dst);
792 cc->newConnRef->updateEndPoint(Avoid::VertID::src, src);
793 }
794 cc->newConnRef->updateEndPoint(Avoid::VertID::tar, dst);
796 cc->newConnRef->makePathInvalid();
797 cc->newConnRef->generatePath(src, dst);
799 Avoid::PolyLine route = cc->newConnRef->route();
800 cc->newConnRef->calcRouteDist();
802 sp_curve_reset(cc->red_curve);
803 NR::Point pt(route.ps[0].x, route.ps[0].y);
804 sp_curve_moveto(cc->red_curve, pt);
806 for (int i = 1; i < route.pn; ++i) {
807 NR::Point p(route.ps[i].x, route.ps[i].y);
808 sp_curve_lineto(cc->red_curve, p);
809 }
810 sp_curve_transform(cc->red_curve, dt->doc2dt());
811 sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(cc->red_bpath), cc->red_curve);
812 }
815 /**
816 * Concats red, blue and green.
817 * If any anchors are defined, process these, optionally removing curves from white list
818 * Invoke _flush_white to write result back to object.
819 */
820 static void
821 spcc_concat_colors_and_flush(SPConnectorContext *cc)
822 {
823 SPCurve *c = cc->green_curve;
824 cc->green_curve = sp_curve_new_sized(64);
826 sp_curve_reset(cc->red_curve);
827 sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(cc->red_bpath), NULL);
829 if (sp_curve_empty(c)) {
830 sp_curve_unref(c);
831 return;
832 }
834 spcc_flush_white(cc, c);
836 sp_curve_unref(c);
837 }
840 /*
841 * Flushes white curve(s) and additional curve into object
842 *
843 * No cleaning of colored curves - this has to be done by caller
844 * No rereading of white data, so if you cannot rely on ::modified, do it in caller
845 *
846 */
848 static void
849 spcc_flush_white(SPConnectorContext *cc, SPCurve *gc)
850 {
851 SPCurve *c;
853 if (gc) {
854 c = gc;
855 sp_curve_ref(c);
856 } else {
857 return;
858 }
860 /* Now we have to go back to item coordinates at last */
861 sp_curve_transform(c,
862 sp_desktop_dt2root_affine(SP_EVENT_CONTEXT_DESKTOP(cc)));
864 SPDesktop *desktop = SP_EVENT_CONTEXT_DESKTOP(cc);
865 SPDocument *doc = sp_desktop_document(desktop);
867 if ( c && !sp_curve_empty(c) ) {
868 /* We actually have something to write */
870 Inkscape::XML::Node *repr = sp_repr_new("svg:path");
871 /* Set style */
872 sp_desktop_apply_style_tool(desktop, repr, "tools.connector", false);
874 gchar *str = sp_svg_write_path(SP_CURVE_BPATH(c));
875 g_assert( str != NULL );
876 repr->setAttribute("d", str);
877 g_free(str);
879 /* Attach repr */
880 cc->newconn = SP_ITEM(desktop->currentLayer()->appendChildRepr(repr));
881 cc->selection->set(repr);
882 Inkscape::GC::release(repr);
883 cc->newconn->transform = i2i_affine(desktop->currentRoot(), desktop->currentLayer());
884 cc->newconn->updateRepr();
886 bool connection = false;
887 sp_object_setAttribute(cc->newconn, "inkscape:connector-type",
888 "polyline", false);
889 if (cc->sid)
890 {
891 sp_object_setAttribute(cc->newconn, "inkscape:connection-start",
892 cc->sid, false);
893 connection = true;
894 }
896 if (cc->eid)
897 {
898 sp_object_setAttribute(cc->newconn, "inkscape:connection-end",
899 cc->eid, false);
900 connection = true;
901 }
902 cc->newconn->updateRepr();
903 if (connection) {
904 // Adjust endpoints to shape edge.
905 sp_conn_adjust_path(SP_PATH(cc->newconn));
906 }
907 cc->newconn->updateRepr();
908 }
910 sp_curve_unref(c);
912 /* Flush pending updates */
913 sp_document_done(doc);
914 sp_document_ensure_up_to_date(doc);
915 }
918 static void
919 spcc_connector_finish_segment(SPConnectorContext *const cc, NR::Point const p)
920 {
921 if (!sp_curve_empty(cc->red_curve)) {
922 sp_curve_append_continuous(cc->green_curve, cc->red_curve, 0.0625);
924 cc->p[0] = cc->p[3];
925 cc->p[1] = cc->p[4];
926 cc->npoints = 2;
928 sp_curve_reset(cc->red_curve);
929 }
930 }
933 static void
934 spcc_connector_finish(SPConnectorContext *const cc)
935 {
936 SPDesktop *const desktop = cc->desktop;
937 desktop->messageStack()->flash(Inkscape::NORMAL_MESSAGE, _("Finishing connector"));
939 sp_curve_reset(cc->red_curve);
940 spcc_concat_colors_and_flush(cc);
942 cc->npoints = 0;
944 if (cc->newConnRef) {
945 cc->newConnRef->removeFromGraph();
946 delete cc->newConnRef;
947 cc->newConnRef = NULL;
948 }
949 cc->state = SP_CONNECTOR_CONTEXT_IDLE;
950 }
953 static gboolean
954 cc_generic_knot_handler(SPCanvasItem *, GdkEvent *event, SPKnot *knot)
955 {
956 g_assert (knot != NULL);
958 g_object_ref(knot);
960 SPConnectorContext *cc = SP_CONNECTOR_CONTEXT(
961 knot->desktop->event_context);
963 gboolean consumed = FALSE;
965 switch (event->type) {
966 case GDK_ENTER_NOTIFY:
967 sp_knot_set_flag(knot, SP_KNOT_MOUSEOVER, TRUE);
969 cc->active_handle = knot;
971 if (knot->tip)
972 {
973 knot->desktop->event_context->defaultMessageContext()->set(
974 Inkscape::NORMAL_MESSAGE, knot->tip);
975 }
977 consumed = TRUE;
978 break;
979 case GDK_LEAVE_NOTIFY:
980 sp_knot_set_flag(knot, SP_KNOT_MOUSEOVER, FALSE);
982 cc->active_handle = NULL;
984 if (knot->tip) {
985 knot->desktop->event_context->defaultMessageContext()->clear();
986 }
988 consumed = TRUE;
989 break;
990 default:
991 break;
992 }
994 g_object_unref(knot);
996 return consumed;
997 }
1000 static gboolean
1001 endpt_handler(SPKnot *knot, GdkEvent *event, SPConnectorContext *cc)
1002 {
1003 g_assert( SP_IS_CONNECTOR_CONTEXT(cc) );
1005 gboolean consumed = FALSE;
1007 switch (event->type) {
1008 case GDK_BUTTON_PRESS:
1009 g_assert( (cc->active_handle == cc->endpt_handle[0]) ||
1010 (cc->active_handle == cc->endpt_handle[1]) );
1011 if (cc->state == SP_CONNECTOR_CONTEXT_IDLE) {
1012 cc->clickeditem = cc->active_conn;
1013 cc->clickedhandle = cc->active_handle;
1014 cc_clear_active_conn(cc);
1015 cc->state = SP_CONNECTOR_CONTEXT_REROUTING;
1017 // Disconnect from attached shape
1018 unsigned ind = (cc->active_handle == cc->endpt_handle[0]) ? 0 : 1;
1019 sp_conn_end_detach(cc->clickeditem, ind);
1021 NR::Point origin;
1022 if (cc->clickedhandle == cc->endpt_handle[0]) {
1023 origin = cc->endpt_handle[1]->pos;
1024 }
1025 else {
1026 origin = cc->endpt_handle[0]->pos;
1027 }
1029 // Show the red path for dragging.
1030 cc->red_curve = sp_curve_copy(SP_PATH(cc->clickeditem)->curve);
1031 NR::Matrix i2d = sp_item_i2d_affine(cc->clickeditem);
1032 sp_curve_transform(cc->red_curve, i2d);
1033 sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(cc->red_bpath),
1034 cc->red_curve);
1036 cc->clickeditem->setHidden(true);
1038 // The rest of the interaction rerouting the connector is
1039 // handled by the context root handler.
1040 consumed = TRUE;
1041 }
1042 break;
1043 default:
1044 break;
1045 }
1047 return consumed;
1048 }
1051 static void cc_set_active_shape(SPConnectorContext *cc, SPItem *item)
1052 {
1053 g_assert(item != NULL );
1055 cc->active_shape = item;
1057 // Remove existing active shape listeners
1058 if (cc->active_shape_repr) {
1059 sp_repr_remove_listener_by_data(cc->active_shape_repr, cc);
1060 Inkscape::GC::release(cc->active_shape_repr);
1062 sp_repr_remove_listener_by_data(cc->active_shape_layer_repr, cc);
1063 Inkscape::GC::release(cc->active_shape_layer_repr);
1064 }
1066 // Listen in case the active shape changes
1067 cc->active_shape_repr = SP_OBJECT_REPR(item);
1068 if (cc->active_shape_repr) {
1069 Inkscape::GC::anchor(cc->active_shape_repr);
1070 sp_repr_add_listener(cc->active_shape_repr, &shape_repr_events, cc);
1072 cc->active_shape_layer_repr = cc->active_shape_repr->parent();
1073 Inkscape::GC::anchor(cc->active_shape_layer_repr);
1074 sp_repr_add_listener(cc->active_shape_layer_repr, &layer_repr_events, cc);
1075 }
1078 // Set center connection point.
1079 if ( cc->connpthandle == NULL ) {
1080 SPKnot *knot = sp_knot_new(cc->desktop,
1081 _("<b>Connection point</b>: click or drag to create a new connector"));
1083 knot->setShape(SP_KNOT_SHAPE_SQUARE);
1084 knot->setSize(8);
1085 knot->setAnchor(GTK_ANCHOR_CENTER);
1086 knot->setFill(0xffffff00, 0xff0000ff, 0xff0000ff);
1087 sp_knot_update_ctrl(knot);
1089 // We don't want to use the standard knot handler,
1090 //since we don't want this knot to be draggable.
1091 g_signal_handler_disconnect(G_OBJECT(knot->item),
1092 knot->_event_handler_id);
1093 knot->_event_handler_id = 0;
1095 gtk_signal_connect(GTK_OBJECT(knot->item), "event",
1096 GTK_SIGNAL_FUNC(cc_generic_knot_handler), knot);
1098 cc->connpthandle = knot;
1099 }
1102 NR::Rect bbox = sp_item_bbox_desktop(cc->active_shape);
1103 NR::Point center = bbox.midpoint();
1104 sp_knot_set_position(cc->connpthandle, ¢er, 0);
1106 sp_knot_show(cc->connpthandle);
1108 }
1111 static void
1112 cc_set_active_conn(SPConnectorContext *cc, SPItem *item)
1113 {
1114 g_assert( SP_IS_PATH(item) );
1116 SPCurve *curve = SP_SHAPE(SP_PATH(item))->curve;
1117 NR::Matrix i2d = sp_item_i2d_affine(item);
1119 if (cc->active_conn == item)
1120 {
1121 // Just adjust handle positions.
1122 NR::Point startpt = sp_curve_first_point(curve) * i2d;
1123 sp_knot_set_position(cc->endpt_handle[0], &startpt, 0);
1125 NR::Point endpt = sp_curve_last_point(curve) * i2d;
1126 sp_knot_set_position(cc->endpt_handle[1], &endpt, 0);
1128 return;
1129 }
1131 cc->active_conn = item;
1133 // Remove existing active conn listeners
1134 if (cc->active_conn_repr) {
1135 sp_repr_remove_listener_by_data(cc->active_conn_repr, cc);
1136 Inkscape::GC::release(cc->active_conn_repr);
1137 cc->active_conn_repr = NULL;
1138 }
1140 // Listen in case the active conn changes
1141 cc->active_conn_repr = SP_OBJECT_REPR(item);
1142 if (cc->active_conn_repr) {
1143 Inkscape::GC::anchor(cc->active_conn_repr);
1144 sp_repr_add_listener(cc->active_conn_repr, &shape_repr_events, cc);
1145 }
1147 for (int i = 0; i < 2; ++i) {
1149 // Create the handle if it doesn't exist
1150 if ( cc->endpt_handle[i] == NULL ) {
1151 SPKnot *knot = sp_knot_new(cc->desktop,
1152 _("<b>Connector endpoint</b>: drag to reroute or connect to new shapes"));
1154 knot->setShape(SP_KNOT_SHAPE_SQUARE);
1155 knot->setSize(7);
1156 knot->setAnchor(GTK_ANCHOR_CENTER);
1157 knot->setFill(0xffffff00, 0xff0000ff, 0xff0000ff);
1158 knot->setStroke(0x000000ff, 0x000000ff, 0x000000ff);
1159 sp_knot_update_ctrl(knot);
1161 // We don't want to use the standard knot handler,
1162 //since we don't want this knot to be draggable.
1163 g_signal_handler_disconnect(G_OBJECT(knot->item),
1164 knot->_event_handler_id);
1165 knot->_event_handler_id = 0;
1167 gtk_signal_connect(GTK_OBJECT(knot->item), "event",
1168 GTK_SIGNAL_FUNC(cc_generic_knot_handler), knot);
1170 cc->endpt_handle[i] = knot;
1171 }
1173 // Remove any existing handlers
1174 if (cc->endpt_handler_id[i]) {
1175 g_signal_handlers_disconnect_by_func(
1176 G_OBJECT(cc->endpt_handle[i]->item),
1177 (void*)G_CALLBACK(endpt_handler), (gpointer) cc );
1178 cc->endpt_handler_id[i] = 0;
1179 }
1181 // Setup handlers for connector endpoints, this is
1182 // is as 'after' so that cc_generic_knot_handler is
1183 // triggered first for any endpoint.
1184 cc->endpt_handler_id[i] = g_signal_connect_after(
1185 G_OBJECT(cc->endpt_handle[i]->item), "event",
1186 G_CALLBACK(endpt_handler), cc);
1187 }
1189 NR::Point startpt = sp_curve_first_point(curve) * i2d;
1190 sp_knot_set_position(cc->endpt_handle[0], &startpt, 0);
1192 NR::Point endpt = sp_curve_last_point(curve) * i2d;
1193 sp_knot_set_position(cc->endpt_handle[1], &endpt, 0);
1195 sp_knot_show(cc->endpt_handle[0]);
1196 sp_knot_show(cc->endpt_handle[1]);
1197 }
1200 static bool cc_item_is_shape(SPItem *item)
1201 {
1202 if (SP_IS_PATH(item)) {
1203 SPCurve *curve = (SP_SHAPE(item))->curve;
1204 if ( curve && !(curve->closed) ) {
1205 // Open paths are connectors.
1206 return false;
1207 }
1208 }
1209 return true;
1210 }
1213 bool cc_item_is_connector(SPItem *item)
1214 {
1215 if (SP_IS_PATH(item)) {
1216 if (SP_PATH(item)->connEndPair.isAutoRoutingConn()) {
1217 g_assert( !(SP_SHAPE(item)->curve->closed) );
1218 return true;
1219 }
1220 }
1221 return false;
1222 }
1225 void cc_selection_set_avoid(bool const set_avoid)
1226 {
1227 SPDesktop *desktop = inkscape_active_desktop();
1228 if (desktop == NULL) {
1229 return;
1230 }
1232 SPDocument *document = sp_desktop_document(desktop);
1234 Inkscape::Selection *selection = sp_desktop_selection(desktop);
1236 GSList *l = (GSList *) selection->itemList();
1238 int changes = 0;
1240 while (l) {
1241 SPItem *item = (SPItem *) l->data;
1243 char const *value = (set_avoid) ? "true" : NULL;
1245 if (cc_item_is_shape(item)) {
1246 sp_object_setAttribute(item, "inkscape:connector-avoid",
1247 value, false);
1248 item->avoidRef->handleSettingChange();
1249 changes++;
1250 }
1252 l = l->next;
1253 }
1255 if (changes == 0) {
1256 desktop->messageStack()->flash(Inkscape::WARNING_MESSAGE,
1257 _("Select <b>at least one non-connector object</b>."));
1258 return;
1259 }
1261 sp_document_done(document);
1262 }
1265 static void
1266 cc_selection_changed(Inkscape::Selection *selection, gpointer data)
1267 {
1268 SPConnectorContext *cc = SP_CONNECTOR_CONTEXT(data);
1269 //SPEventContext *ec = SP_EVENT_CONTEXT(cc);
1271 SPItem *item = selection->singleItem();
1273 if (cc->active_conn == item)
1274 {
1275 // Nothing to change.
1276 return;
1277 }
1278 if (item == NULL)
1279 {
1280 cc_clear_active_conn(cc);
1281 return;
1282 }
1284 if (cc_item_is_connector(item)) {
1285 cc_set_active_conn(cc, item);
1286 }
1287 }
1290 static void
1291 shape_event_attr_deleted(Inkscape::XML::Node *repr, Inkscape::XML::Node *child,
1292 Inkscape::XML::Node *ref, gpointer data)
1293 {
1294 g_assert(data);
1295 SPConnectorContext *cc = SP_CONNECTOR_CONTEXT(data);
1297 if (child == cc->active_shape_repr) {
1298 // The active shape has been deleted. Clear active shape.
1299 cc_clear_active_shape(cc);
1300 }
1301 }
1304 static void
1305 shape_event_attr_changed(Inkscape::XML::Node *repr, gchar const *name,
1306 gchar const *old_value, gchar const *new_value,
1307 bool is_interactive, gpointer data)
1308 {
1309 g_assert(data);
1310 SPConnectorContext *cc = SP_CONNECTOR_CONTEXT(data);
1312 // Look for changes than result in onscreen movement.
1313 if (!strcmp(name, "d") || !strcmp(name, "x") || !strcmp(name, "y") ||
1314 !strcmp(name, "width") || !strcmp(name, "height") ||
1315 !strcmp(name, "transform"))
1316 {
1317 if (repr == cc->active_shape_repr) {
1318 // Active shape has moved. Clear active shape.
1319 cc_clear_active_shape(cc);
1320 }
1321 else if (repr == cc->active_conn_repr) {
1322 // The active conn has been moved.
1323 // Set it again, which just sets new handle positions.
1324 cc_set_active_conn(cc, cc->active_conn);
1325 }
1326 }
1327 }
1330 /*
1331 Local Variables:
1332 mode:c++
1333 c-file-style:"stroustrup"
1334 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
1335 indent-tabs-mode:nil
1336 fill-column:99
1337 End:
1338 */
1339 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :