src/connector-context.cpp

   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 convex 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  Allow user to change a object between a path and connector through
  21  *     the interface.
  22  *  o  Create an interface for setting markers (arrow heads).
  23  *  o  Better distinguish between paths and connectors to prevent problems
  24  *     in the node tool and paths accidently being turned into connectors
  25  *     in the connector tool.  Perhaps have a way to convert between.
  26  *  o  Only call libavoid's updateEndPoint as required.  Currently we do it
  27  *     for both endpoints, even if only one is moving.
  28  *  o  Allow user-placeable connection points.
  29  *  o  Deal sanely with connectors with both endpoints attached to the
  30  *     same connection point, and drawing of connectors attaching
  31  *     overlaping shapes (currently tries to adjust connector to be
  32  *     outside both bounding boxes).
  33  *  o  Fix many special cases related to connectors updating,
  34  *     e.g., copying a couple of shapes and a connector that are
  35  *           attached to each other.
  36  *     e.g., detach connector when it is moved or transformed in
  37  *           one of the other contexts.
  38  *  o  Cope with shapes whose ids change when they have attached
  39  *     connectors.
  40  *  o  gobble_motion_events(GDK_BUTTON1_MASK)?;
  41  *
  42  */
  43
  44 #include <gdk/gdkkeysyms.h>
  45
  46 #include "connector-context.h"
  47 #include "pixmaps/cursor-connector.xpm"
  48 #include "pixmaps/cursor-connector.pixbuf"
  49 #include "xml/node-event-vector.h"
  50 #include "xml/repr.h"
  51 #include "svg/svg.h"
  52 #include "desktop.h"
  53 #include "desktop-style.h"
  54 #include "desktop-affine.h"
  55 #include "desktop-handles.h"
  56 #include "document.h"
  57 #include "message-context.h"
  58 #include "message-stack.h"
  59 #include "selection.h"
  60 #include "inkscape.h"
  61 #include "prefs-utils.h"
  62 #include "sp-path.h"
  63 #include "display/canvas-bpath.h"
  64 #include "display/sodipodi-ctrl.h"
  65 #include <glibmm/i18n.h>
  66 #include "snap.h"
  67 #include "knot.h"
  68 #include "sp-conn-end.h"
  69 #include "conn-avoid-ref.h"
  70 #include "libavoid/vertices.h"
  71 #include "context-fns.h"
  72 #include "sp-namedview.h"
  73 #include "sp-text.h"
  74 #include "sp-flowtext.h"
  75
  76
  77 static void sp_connector_context_class_init(SPConnectorContextClass *klass);
  78 static void sp_connector_context_init(SPConnectorContext *conn_context);
  79 static void sp_connector_context_dispose(GObject *object);
  80
  81 static void sp_connector_context_setup(SPEventContext *ec);
  82 static void sp_connector_context_finish(SPEventContext *ec);
  83 static gint sp_connector_context_root_handler(SPEventContext *ec, GdkEvent *event);
  84 static gint sp_connector_context_item_handler(SPEventContext *event_context, SPItem *item, GdkEvent *event);
  85
  86 // Stuff borrowed from DrawContext
  87 static void spcc_connector_set_initial_point(SPConnectorContext *cc, NR::Point const p);
  88 static void spcc_connector_set_subsequent_point(SPConnectorContext *cc, NR::Point const p);
  89 static void spcc_connector_finish_segment(SPConnectorContext *cc, NR::Point p);
  90 static void spcc_reset_colors(SPConnectorContext *cc);
  91 static void spcc_connector_finish(SPConnectorContext *cc);
  92 static void spcc_concat_colors_and_flush(SPConnectorContext *cc);
  93 static void spcc_flush_white(SPConnectorContext *cc, SPCurve *gc);
  94
  95 // Context event handlers
  96 static gint connector_handle_button_press(SPConnectorContext *const cc, GdkEventButton const &bevent);
  97 static gint connector_handle_motion_notify(SPConnectorContext *const cc, GdkEventMotion const &mevent);
  98 static gint connector_handle_button_release(SPConnectorContext *const cc, GdkEventButton const &revent);
  99 static gint connector_handle_key_press(SPConnectorContext *const cc, guint const keyval);
 100
 101 static void cc_set_active_shape(SPConnectorContext *cc, SPItem *item);
 102 static void cc_clear_active_shape(SPConnectorContext *cc);
 103 static void cc_set_active_conn(SPConnectorContext *cc, SPItem *item);
 104 static void cc_clear_active_conn(SPConnectorContext *cc);
 105 static gchar *conn_pt_handle_test(SPConnectorContext *cc, NR::Point& w);
 106 static bool cc_item_is_shape(SPItem *item);
 107 static void cc_selection_changed(Inkscape::Selection *selection, gpointer data);
 108
 109 static void shape_event_attr_deleted(Inkscape::XML::Node *repr,
 110         Inkscape::XML::Node *child, Inkscape::XML::Node *ref, gpointer data);
 111 static void shape_event_attr_changed(Inkscape::XML::Node *repr, gchar const *name,
 112         gchar const *old_value, gchar const *new_value, bool is_interactive,
 113         gpointer data);
 114
 115
 116 static NR::Point connector_drag_origin_w(0, 0);
 117 static bool connector_within_tolerance = false;
 118 static SPEventContextClass *parent_class;
 119
 120
 121 static Inkscape::XML::NodeEventVector shape_repr_events = {
 122     NULL, /* child_added */
 123     NULL, /* child_added */
 124     shape_event_attr_changed,
 125     NULL, /* content_changed */
 126     NULL  /* order_changed */
 127 };
 128
 129 static Inkscape::XML::NodeEventVector layer_repr_events = {
 130     NULL, /* child_added */
 131     shape_event_attr_deleted,
 132     NULL, /* child_added */
 133     NULL, /* content_changed */
 134     NULL  /* order_changed */
 135 };
 136
 137
 138 GType
 139 sp_connector_context_get_type(void)
 140 {
 141     static GType type = 0;
 142     if (!type) {
 143         GTypeInfo info = {
 144             sizeof(SPConnectorContextClass),
 145             NULL, NULL,
 146             (GClassInitFunc) sp_connector_context_class_init,
 147             NULL, NULL,
 148             sizeof(SPConnectorContext),
 149             4,
 150             (GInstanceInitFunc) sp_connector_context_init,
 151             NULL,   /* value_table */
 152         };
 153         type = g_type_register_static(SP_TYPE_EVENT_CONTEXT, "SPConnectorContext", &info, (GTypeFlags)0);
 154     }
 155     return type;
 156 }
 157
 158 static void
 159 sp_connector_context_class_init(SPConnectorContextClass *klass)
 160 {
 161     GObjectClass *object_class;
 162     SPEventContextClass *event_context_class;
 163
 164     object_class = (GObjectClass *) klass;
 165     event_context_class = (SPEventContextClass *) klass;
 166
 167     parent_class = (SPEventContextClass*)g_type_class_peek_parent(klass);
 168
 169     object_class->dispose = sp_connector_context_dispose;
 170
 171     event_context_class->setup = sp_connector_context_setup;
 172     event_context_class->finish = sp_connector_context_finish;
 173     event_context_class->root_handler = sp_connector_context_root_handler;
 174     event_context_class->item_handler = sp_connector_context_item_handler;
 175 }
 176
 177
 178 static void
 179 sp_connector_context_init(SPConnectorContext *cc)
 180 {
 181     SPEventContext *ec = SP_EVENT_CONTEXT(cc);
 182
 183     ec->cursor_shape = cursor_connector_xpm;
 184     ec->cursor_pixbuf = gdk_pixbuf_new_from_inline(
 185             -1,
 186             cursor_connector_pixbuf,
 187             FALSE,
 188             NULL);
 189     ec->hot_x = 1;
 190     ec->hot_y = 1;
 191     ec->xp = 0;
 192     ec->yp = 0;
 193
 194     cc->red_color = 0xff00007f;
 195
 196     cc->newconn = NULL;
 197     cc->newConnRef = NULL;
 198
 199     cc->sel_changed_connection = sigc::connection();
 200
 201     cc->active_shape = NULL;
 202     cc->active_shape_repr = NULL;
 203     cc->active_shape_layer_repr = NULL;
 204
 205     cc->active_conn = NULL;
 206     cc->active_conn_repr = NULL;
 207
 208     cc->active_handle = NULL;
 209
 210     cc->clickeditem = NULL;
 211     cc->clickedhandle = NULL;
 212
 213     cc->connpthandle = NULL;
 214     for (int i = 0; i < 2; ++i) {
 215         cc->endpt_handle[i] = NULL;
 216         cc->endpt_handler_id[i] = 0;
 217     }
 218     cc->sid = NULL;
 219     cc->eid = NULL;
 220     cc->npoints = 0;
 221     cc->state = SP_CONNECTOR_CONTEXT_IDLE;
 222 }
 223
 224
 225 static void
 226 sp_connector_context_dispose(GObject *object)
 227 {
 228     SPConnectorContext *cc = SP_CONNECTOR_CONTEXT(object);
 229
 230     cc->sel_changed_connection.disconnect();
 231
 232     if (cc->connpthandle) {
 233         g_object_unref(cc->connpthandle);
 234         cc->connpthandle = NULL;
 235     }
 236     for (int i = 0; i < 2; ++i) {
 237         if (cc->endpt_handle[1]) {
 238             g_object_unref(cc->endpt_handle[i]);
 239             cc->endpt_handle[i] = NULL;
 240         }
 241     }
 242     if (cc->sid) {
 243         g_free(cc->sid);
 244         cc->sid = NULL;
 245     }
 246     if (cc->eid) {
 247         g_free(cc->eid);
 248         cc->eid = NULL;
 249     }
 250     g_assert( cc->newConnRef == NULL );
 251
 252     G_OBJECT_CLASS(parent_class)->dispose(object);
 253 }
 254
 255
 256 static void
 257 sp_connector_context_setup(SPEventContext *ec)
 258 {
 259     SPConnectorContext *cc = SP_CONNECTOR_CONTEXT(ec);
 260     SPDesktop *dt = ec->desktop;
 261
 262     if (((SPEventContextClass *) parent_class)->setup) {
 263         ((SPEventContextClass *) parent_class)->setup(ec);
 264     }
 265
 266     cc->selection = sp_desktop_selection(dt);
 267
 268     cc->sel_changed_connection.disconnect();
 269     cc->sel_changed_connection = cc->selection->connectChanged(
 270             sigc::bind(sigc::ptr_fun(&cc_selection_changed),
 271             (gpointer) cc));
 272
 273     /* Create red bpath */
 274     cc->red_bpath = sp_canvas_bpath_new(sp_desktop_sketch(ec->desktop), NULL);
 275     sp_canvas_bpath_set_stroke(SP_CANVAS_BPATH(cc->red_bpath), cc->red_color,
 276             1.0, SP_STROKE_LINEJOIN_MITER, SP_STROKE_LINECAP_BUTT);
 277     sp_canvas_bpath_set_fill(SP_CANVAS_BPATH(cc->red_bpath), 0x00000000,
 278             SP_WIND_RULE_NONZERO);
 279     /* Create red curve */
 280     cc->red_curve = sp_curve_new_sized(4);
 281
 282     /* Create green curve */
 283     cc->green_curve = sp_curve_new_sized(64);
 284
 285     // Notice the initial selection.
 286     cc_selection_changed(cc->selection, (gpointer) cc);
 287
 288     if (prefs_get_int_attribute("tools.connector", "selcue", 0) != 0) {
 289         ec->enableSelectionCue();
 290     }
 291
 292     // Make sure we see all enter events for canvas items,
 293     // even if a mouse button is depressed.
 294     dt->canvas->gen_all_enter_events = true;
 295 }
 296
 297
 298 static void
 299 sp_connector_context_finish(SPEventContext *ec)
 300 {
 301     SPConnectorContext *cc = SP_CONNECTOR_CONTEXT(ec);
 302
 303     spcc_connector_finish(cc);
 304
 305     if (((SPEventContextClass *) parent_class)->finish) {
 306         ((SPEventContextClass *) parent_class)->finish(ec);
 307     }
 308
 309     if (cc->selection) {
 310         cc->selection = NULL;
 311     }
 312     cc_clear_active_shape(cc);
 313     cc_clear_active_conn(cc);
 314
 315     // Restore the default event generating behaviour.
 316     SPDesktop *desktop = SP_EVENT_CONTEXT_DESKTOP(ec);
 317     desktop->canvas->gen_all_enter_events = false;
 318 }
 319
 320
 321 //-----------------------------------------------------------------------------
 322
 323
 324 static void
 325 cc_clear_active_shape(SPConnectorContext *cc)
 326 {
 327     if (cc->active_shape == NULL) {
 328         return;
 329     }
 330     g_assert( cc->active_shape_repr );
 331     g_assert( cc->active_shape_layer_repr );
 332
 333     cc->active_shape = NULL;
 334
 335     if (cc->active_shape_repr) {
 336         sp_repr_remove_listener_by_data(cc->active_shape_repr, cc);
 337         Inkscape::GC::release(cc->active_shape_repr);
 338         cc->active_shape_repr = NULL;
 339
 340         sp_repr_remove_listener_by_data(cc->active_shape_layer_repr, cc);
 341         Inkscape::GC::release(cc->active_shape_layer_repr);
 342         cc->active_shape_layer_repr = NULL;
 343     }
 344
 345     // Hide the center connection point if it exists.
 346     if (cc->connpthandle) {
 347         sp_knot_hide(cc->connpthandle);
 348     }
 349 }
 350
 351
 352 static void
 353 cc_clear_active_conn(SPConnectorContext *cc)
 354 {
 355     if (cc->active_conn == NULL) {
 356         return;
 357     }
 358     g_assert( cc->active_conn_repr );
 359
 360     cc->active_conn = NULL;
 361
 362     if (cc->active_conn_repr) {
 363         sp_repr_remove_listener_by_data(cc->active_conn_repr, cc);
 364         Inkscape::GC::release(cc->active_conn_repr);
 365         cc->active_conn_repr = NULL;
 366     }
 367
 368     // Hide the endpoint handles.
 369     for (int i = 0; i < 2; ++i) {
 370         if (cc->endpt_handle[i]) {
 371             sp_knot_hide(cc->endpt_handle[i]);
 372         }
 373     }
 374 }
 375
 376
 377 static gchar *
 378 conn_pt_handle_test(SPConnectorContext *cc, NR::Point& p)
 379 {
 380     // TODO: this will need to change when there are more connection
 381     //       points available for each shape.
 382
 383     SPKnot *centerpt = cc->connpthandle;
 384     if (cc->active_handle && (cc->active_handle == centerpt))
 385     {
 386         p = centerpt->pos;
 387         return g_strdup_printf("#%s", SP_OBJECT_ID(cc->active_shape));
 388     }
 389     return NULL;
 390 }
 391
 392
 393
 394 static gint
 395 sp_connector_context_item_handler(SPEventContext *ec, SPItem *item, GdkEvent *event)
 396 {
 397     gint ret = FALSE;
 398
 399     SPDesktop *desktop = ec->desktop;
 400
 401     SPConnectorContext *cc = SP_CONNECTOR_CONTEXT(ec);
 402
 403     NR::Point p(event->button.x, event->button.y);
 404
 405     switch (event->type) {
 406         case GDK_BUTTON_RELEASE:
 407             if (event->button.button == 1) {
 408                 if ((cc->state == SP_CONNECTOR_CONTEXT_DRAGGING) &&
 409                         (connector_within_tolerance))
 410                 {
 411                     spcc_reset_colors(cc);
 412                     cc->state = SP_CONNECTOR_CONTEXT_IDLE;
 413                 }
 414                 if (cc->state != SP_CONNECTOR_CONTEXT_IDLE) {
 415                     // Doing simething else like rerouting.
 416                     break;
 417                 }
 418                 // find out clicked item, disregarding groups, honoring Alt
 419                 SPItem *item_ungrouped = sp_event_context_find_item(desktop,
 420                         p, event->button.state & GDK_MOD1_MASK, TRUE);
 421
 422                 if (event->button.state & GDK_SHIFT_MASK) {
 423                     cc->selection->toggle(item_ungrouped);
 424                 } else {
 425                     cc->selection->set(item_ungrouped);
 426                 }
 427                 ret = TRUE;
 428             }
 429             break;
 430         case GDK_ENTER_NOTIFY:
 431         {
 432             if (cc_item_is_shape(item)) {
 433                 // This is a shape, so show connection point(s).
 434                 if (!(cc->active_shape) ||
 435                         // Don't show handle for another handle.
 436                         (item != ((SPItem *) cc->connpthandle))) {
 437                     cc_set_active_shape(cc, item);
 438                 }
 439             }
 440             ret = TRUE;
 441             break;
 442         }
 443         default:
 444             break;
 445     }
 446
 447     return ret;
 448 }
 449
 450
 451 gint
 452 sp_connector_context_root_handler(SPEventContext *ec, GdkEvent *event)
 453 {
 454     SPConnectorContext *const cc = SP_CONNECTOR_CONTEXT(ec);
 455
 456     gint ret = FALSE;
 457
 458     switch (event->type) {
 459         case GDK_BUTTON_PRESS:
 460             ret = connector_handle_button_press(cc, event->button);
 461             break;
 462
 463         case GDK_MOTION_NOTIFY:
 464             ret = connector_handle_motion_notify(cc, event->motion);
 465             break;
 466
 467         case GDK_BUTTON_RELEASE:
 468             ret = connector_handle_button_release(cc, event->button);
 469             break;
 470         case GDK_KEY_PRESS:
 471             ret = connector_handle_key_press(cc, get_group0_keyval (&event->key));
 472             break;
 473
 474         default:
 475             break;
 476     }
 477
 478     if (!ret) {
 479         gint (*const parent_root_handler)(SPEventContext *, GdkEvent *)
 480             = ((SPEventContextClass *) parent_class)->root_handler;
 481         if (parent_root_handler) {
 482             ret = parent_root_handler(ec, event);
 483         }
 484     }
 485
 486     return ret;
 487 }
 488
 489
 490 static gint
 491 connector_handle_button_press(SPConnectorContext *const cc, GdkEventButton const &bevent)
 492 {
 493     NR::Point const event_w(bevent.x, bevent.y);
 494     /* Find desktop coordinates */
 495     NR::Point p = cc->desktop->w2d(event_w);
 496
 497     gint ret = FALSE;
 498     if ( bevent.button == 1 ) {
 499
 500         SPDesktop *desktop = SP_EVENT_CONTEXT_DESKTOP(cc);
 501
 502         if (Inkscape::have_viable_layer(desktop, cc->_message_context) == false) {
 503             return TRUE;
 504         }
 505
 506         NR::Point const event_w(bevent.x,
 507                                 bevent.y);
 508         connector_drag_origin_w = event_w;
 509         connector_within_tolerance = true;
 510
 511         NR::Point const event_dt = cc->desktop->w2d(event_w);
 512         switch (cc->state) {
 513             case SP_CONNECTOR_CONTEXT_STOP:
 514                 /* This is allowed, if we just cancelled curve */
 515             case SP_CONNECTOR_CONTEXT_IDLE:
 516             {
 517                 if ( cc->npoints == 0 ) {
 518                     /* Set start anchor */
 519                     NR::Point p;
 520
 521                     cc_clear_active_conn(cc);
 522
 523                     SP_EVENT_CONTEXT_DESKTOP(cc)->messageStack()->flash(Inkscape::NORMAL_MESSAGE, _("Creating new connector"));
 524
 525                     /* Create green anchor */
 526                     p = event_dt;
 527
 528                     // Test whether we clicked on a connection point
 529                     cc->sid = conn_pt_handle_test(cc, p);
 530
 531                     if (!cc->sid) {
 532                         // This is the first point, so just snap it to the grid
 533                         // as there's no other points to go off.
 534                         SnapManager const &m = cc->desktop->namedview->snap_manager;
 535                         p = m.freeSnap(Inkscape::Snapper::SNAP_POINT | Inkscape::Snapper::BBOX_POINT,
 536                                        p, NULL).getPoint();
 537                     }
 538                     spcc_connector_set_initial_point(cc, p);
 539
 540                 }
 541                 cc->state = SP_CONNECTOR_CONTEXT_DRAGGING;
 542                 ret = TRUE;
 543                 break;
 544             }
 545             case SP_CONNECTOR_CONTEXT_DRAGGING:
 546             {
 547                 // This is the second click of a connector creation.
 548
 549                 spcc_connector_set_subsequent_point(cc, p);
 550                 spcc_connector_finish_segment(cc, p);
 551                 // Test whether we clicked on a connection point
 552                 cc->eid = conn_pt_handle_test(cc, p);
 553                 if (cc->npoints != 0) {
 554                     spcc_connector_finish(cc);
 555                 }
 556                 cc_set_active_conn(cc, cc->newconn);
 557                 cc->state = SP_CONNECTOR_CONTEXT_IDLE;
 558                 ret = TRUE;
 559                 break;
 560             }
 561             case SP_CONNECTOR_CONTEXT_CLOSE:
 562             {
 563                 g_warning("Button down in CLOSE state");
 564                 break;
 565             }
 566             default:
 567                 break;
 568         }
 569     } else if (bevent.button == 3) {
 570         if (cc->npoints != 0) {
 571             spcc_connector_finish(cc);
 572             ret = TRUE;
 573         }
 574     }
 575     return ret;
 576 }
 577
 578
 579 static gint
 580 connector_handle_motion_notify(SPConnectorContext *const cc, GdkEventMotion const &mevent)
 581 {
 582     gint ret = FALSE;
 583
 584     if (mevent.state & GDK_BUTTON2_MASK || mevent.state & GDK_BUTTON3_MASK) {
 585         // allow middle-button scrolling
 586         return FALSE;
 587     }
 588
 589     NR::Point const event_w(mevent.x, mevent.y);
 590
 591     if (connector_within_tolerance) {
 592         gint const tolerance = prefs_get_int_attribute_limited("options.dragtolerance",
 593                                                                "value", 0, 0, 100);
 594         if ( NR::LInfty( event_w - connector_drag_origin_w ) < tolerance ) {
 595             return FALSE;   // Do not drag if we're within tolerance from origin.
 596         }
 597     }
 598     // Once the user has moved farther than tolerance from the original location
 599     // (indicating they intend to move the object, not click), then always process
 600     // the motion notify coordinates as given (no snapping back to origin)
 601     connector_within_tolerance = false;
 602
 603     SPDesktop *const dt = cc->desktop;
 604
 605     /* Find desktop coordinates */
 606     NR::Point p = dt->w2d(event_w);
 607
 608     switch (cc->state) {
 609         case SP_CONNECTOR_CONTEXT_DRAGGING:
 610         {
 611             // This is movement during a connector creation.
 612
 613             if ( cc->npoints > 0 ) {
 614                 cc->selection->clear();
 615                 spcc_connector_set_subsequent_point(cc, p);
 616                 ret = TRUE;
 617             }
 618             break;
 619         }
 620         case SP_CONNECTOR_CONTEXT_REROUTING:
 621         {
 622             g_assert( SP_IS_PATH(cc->clickeditem));
 623
 624             // Update the hidden path
 625             NR::Matrix i2d = sp_item_i2d_affine(cc->clickeditem);
 626             NR::Matrix d2i = i2d.inverse();
 627             SPPath *path = SP_PATH(cc->clickeditem);
 628             SPCurve *curve = (SP_SHAPE(path))->curve;
 629             if (cc->clickedhandle == cc->endpt_handle[0]) {
 630                 NR::Point o = cc->endpt_handle[1]->pos;
 631                 sp_curve_stretch_endpoints(curve, p * d2i, o * d2i);
 632             }
 633             else {
 634                 NR::Point o = cc->endpt_handle[0]->pos;
 635                 sp_curve_stretch_endpoints(curve, o * d2i, p * d2i);
 636             }
 637             sp_conn_adjust_path(path);
 638
 639             // Copy this to the temporary visible path
 640             cc->red_curve = sp_curve_copy(SP_SHAPE(path)->curve);
 641             sp_curve_transform(cc->red_curve, i2d);
 642
 643             sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(cc->red_bpath), cc->red_curve);
 644             ret = TRUE;
 645             break;
 646         }
 647         case SP_CONNECTOR_CONTEXT_STOP:
 648             /* This is perfectly valid */
 649             break;
 650         default:
 651             break;
 652     }
 653
 654     return ret;
 655 }
 656
 657
 658 static gint
 659 connector_handle_button_release(SPConnectorContext *const cc, GdkEventButton const &revent)
 660 {
 661     gint ret = FALSE;
 662     if ( revent.button == 1 ) {
 663
 664         SPDesktop *desktop = SP_EVENT_CONTEXT_DESKTOP(cc);
 665         SPDocument *doc = sp_desktop_document(desktop);
 666
 667         NR::Point const event_w(revent.x, revent.y);
 668
 669         /* Find desktop coordinates */
 670         NR::Point p = cc->desktop->w2d(event_w);
 671
 672         switch (cc->state) {
 673             //case SP_CONNECTOR_CONTEXT_POINT:
 674             case SP_CONNECTOR_CONTEXT_DRAGGING:
 675             {
 676                 if (connector_within_tolerance)
 677                 {
 678                     spcc_connector_finish_segment(cc, p);
 679                     return TRUE;
 680                 }
 681                 // Connector has been created via a drag, end it now.
 682                 spcc_connector_set_subsequent_point(cc, p);
 683                 spcc_connector_finish_segment(cc, p);
 684                 // Test whether we clicked on a connection point
 685                 cc->eid = conn_pt_handle_test(cc, p);
 686                 if (cc->npoints != 0) {
 687                     spcc_connector_finish(cc);
 688                 }
 689                 cc_set_active_conn(cc, cc->newconn);
 690                 cc->state = SP_CONNECTOR_CONTEXT_IDLE;
 691                 break;
 692             }
 693             case SP_CONNECTOR_CONTEXT_REROUTING:
 694             {
 695                 // Clear the temporary path:
 696                 sp_curve_reset(cc->red_curve);
 697                 sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(cc->red_bpath), NULL);
 698
 699                 // Test whether we clicked on a connection point
 700                 gchar *shape_label = conn_pt_handle_test(cc, p);
 701
 702                 if (shape_label) {
 703                     if (cc->clickedhandle == cc->endpt_handle[0]) {
 704                         sp_object_setAttribute(cc->clickeditem,
 705                                 "inkscape:connection-start",shape_label, false);
 706                     }
 707                     else {
 708                         sp_object_setAttribute(cc->clickeditem,
 709                                 "inkscape:connection-end",shape_label, false);
 710                     }
 711                     g_free(shape_label);
 712                 }
 713                 cc->clickeditem->setHidden(false);
 714                 sp_conn_adjust_path(SP_PATH(cc->clickeditem));
 715                 cc->clickeditem->updateRepr();
 716                 sp_document_done(doc, SP_VERB_CONTEXT_CONNECTOR,
 717                                  _("Reroute connector"));
 718                 cc_set_active_conn(cc, cc->clickeditem);
 719                 sp_document_ensure_up_to_date(doc);
 720                 cc->state = SP_CONNECTOR_CONTEXT_IDLE;
 721                 return TRUE;
 722                 break;
 723             }
 724             case SP_CONNECTOR_CONTEXT_STOP:
 725                 /* This is allowed, if we just cancelled curve */
 726                 break;
 727             default:
 728                 break;
 729         }
 730         ret = TRUE;
 731     }
 732
 733     return ret;
 734 }
 735
 736
 737 static gint
 738 connector_handle_key_press(SPConnectorContext *const cc, guint const keyval)
 739 {
 740     gint ret = FALSE;
 741     /* fixme: */
 742     switch (keyval) {
 743         case GDK_Return:
 744         case GDK_KP_Enter:
 745             if (cc->npoints != 0) {
 746                 spcc_connector_finish(cc);
 747                 ret = TRUE;
 748             }
 749             break;
 750         case GDK_Escape:
 751             if (cc->npoints != 0) {
 752                 // if drawing, cancel, otherwise pass it up for deselecting
 753                 cc->state = SP_CONNECTOR_CONTEXT_STOP;
 754                 spcc_reset_colors(cc);
 755                 ret = TRUE;
 756             }
 757             break;
 758         default:
 759             break;
 760     }
 761     return ret;
 762 }
 763
 764
 765 static void
 766 spcc_reset_colors(SPConnectorContext *cc)
 767 {
 768     /* Red */
 769     sp_curve_reset(cc->red_curve);
 770     sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(cc->red_bpath), NULL);
 771
 772     sp_curve_reset(cc->green_curve);
 773     cc->npoints = 0;
 774 }
 775
 776
 777 static void
 778 spcc_connector_set_initial_point(SPConnectorContext *const cc, NR::Point const p)
 779 {
 780     g_assert( cc->npoints == 0 );
 781
 782     cc->p[0] = p;
 783     cc->p[1] = p;
 784     cc->npoints = 2;
 785     sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(cc->red_bpath), NULL);
 786 }
 787
 788
 789 static void
 790 spcc_connector_set_subsequent_point(SPConnectorContext *const cc, NR::Point const p)
 791 {
 792     g_assert( cc->npoints != 0 );
 793
 794     SPDesktop *dt = cc->desktop;
 795     NR::Point o = dt->dt2doc(cc->p[0]);
 796     NR::Point d = dt->dt2doc(p);
 797     Avoid::Point src = { o[NR::X], o[NR::Y] };
 798     Avoid::Point dst = { d[NR::X], d[NR::Y] };
 799
 800     if (!cc->newConnRef) {
 801         Avoid::Router *router = sp_desktop_document(dt)->router;
 802         cc->newConnRef = new Avoid::ConnRef(router, 0, src, dst);
 803         cc->newConnRef->updateEndPoint(Avoid::VertID::src, src);
 804     }
 805     cc->newConnRef->updateEndPoint(Avoid::VertID::tar, dst);
 806
 807     cc->newConnRef->makePathInvalid();
 808     cc->newConnRef->generatePath(src, dst);
 809
 810     Avoid::PolyLine route = cc->newConnRef->route();
 811     cc->newConnRef->calcRouteDist();
 812
 813     sp_curve_reset(cc->red_curve);
 814     NR::Point pt(route.ps[0].x, route.ps[0].y);
 815     sp_curve_moveto(cc->red_curve, pt);
 816
 817     for (int i = 1; i < route.pn; ++i) {
 818         NR::Point p(route.ps[i].x, route.ps[i].y);
 819         sp_curve_lineto(cc->red_curve, p);
 820     }
 821     sp_curve_transform(cc->red_curve, dt->doc2dt());
 822     sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(cc->red_bpath), cc->red_curve);
 823 }
 824
 825
 826 /**
 827  * Concats red, blue and green.
 828  * If any anchors are defined, process these, optionally removing curves from white list
 829  * Invoke _flush_white to write result back to object.
 830  */
 831 static void
 832 spcc_concat_colors_and_flush(SPConnectorContext *cc)
 833 {
 834     SPCurve *c = cc->green_curve;
 835     cc->green_curve = sp_curve_new_sized(64);
 836
 837     sp_curve_reset(cc->red_curve);
 838     sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(cc->red_bpath), NULL);
 839
 840     if (sp_curve_empty(c)) {
 841         sp_curve_unref(c);
 842         return;
 843     }
 844
 845     spcc_flush_white(cc, c);
 846
 847     sp_curve_unref(c);
 848 }
 849
 850
 851 /*
 852  * Flushes white curve(s) and additional curve into object
 853  *
 854  * No cleaning of colored curves - this has to be done by caller
 855  * No rereading of white data, so if you cannot rely on ::modified, do it in caller
 856  *
 857  */
 858
 859 static void
 860 spcc_flush_white(SPConnectorContext *cc, SPCurve *gc)
 861 {
 862     SPCurve *c;
 863
 864     if (gc) {
 865         c = gc;
 866         sp_curve_ref(c);
 867     } else {
 868         return;
 869     }
 870
 871     /* Now we have to go back to item coordinates at last */
 872     sp_curve_transform(c,
 873             sp_desktop_dt2root_affine(SP_EVENT_CONTEXT_DESKTOP(cc)));
 874
 875     SPDesktop *desktop = SP_EVENT_CONTEXT_DESKTOP(cc);
 876     SPDocument *doc = sp_desktop_document(desktop);
 877
 878     if ( c && !sp_curve_empty(c) ) {
 879         /* We actually have something to write */
 880
 881         Inkscape::XML::Node *repr = sp_repr_new("svg:path");
 882         /* Set style */
 883         sp_desktop_apply_style_tool(desktop, repr, "tools.connector", false);
 884
 885         gchar *str = sp_svg_write_path(SP_CURVE_BPATH(c));
 886         g_assert( str != NULL );
 887         repr->setAttribute("d", str);
 888         g_free(str);
 889
 890         /* Attach repr */
 891         cc->newconn = SP_ITEM(desktop->currentLayer()->appendChildRepr(repr));
 892         cc->selection->set(repr);
 893         Inkscape::GC::release(repr);
 894         cc->newconn->transform = i2i_affine(desktop->currentRoot(), desktop->currentLayer());
 895         cc->newconn->updateRepr();
 896
 897         bool connection = false;
 898         sp_object_setAttribute(cc->newconn, "inkscape:connector-type",
 899                 "polyline", false);
 900         if (cc->sid)
 901         {
 902             sp_object_setAttribute(cc->newconn, "inkscape:connection-start",
 903                     cc->sid, false);
 904             connection = true;
 905         }
 906
 907         if (cc->eid)
 908         {
 909             sp_object_setAttribute(cc->newconn, "inkscape:connection-end",
 910                     cc->eid, false);
 911             connection = true;
 912         }
 913         cc->newconn->updateRepr();
 914         if (connection) {
 915             // Adjust endpoints to shape edge.
 916             sp_conn_adjust_path(SP_PATH(cc->newconn));
 917         }
 918         cc->newconn->updateRepr();
 919     }
 920
 921     sp_curve_unref(c);
 922
 923     /* Flush pending updates */
 924     sp_document_done(doc, SP_VERB_CONTEXT_CONNECTOR, _("Create connector"));
 925     sp_document_ensure_up_to_date(doc);
 926 }
 927
 928
 929 static void
 930 spcc_connector_finish_segment(SPConnectorContext *const cc, NR::Point const p)
 931 {
 932     if (!sp_curve_empty(cc->red_curve)) {
 933         sp_curve_append_continuous(cc->green_curve, cc->red_curve, 0.0625);
 934
 935         cc->p[0] = cc->p[3];
 936         cc->p[1] = cc->p[4];
 937         cc->npoints = 2;
 938
 939         sp_curve_reset(cc->red_curve);
 940     }
 941 }
 942
 943
 944 static void
 945 spcc_connector_finish(SPConnectorContext *const cc)
 946 {
 947     SPDesktop *const desktop = cc->desktop;
 948     desktop->messageStack()->flash(Inkscape::NORMAL_MESSAGE, _("Finishing connector"));
 949
 950     sp_curve_reset(cc->red_curve);
 951     spcc_concat_colors_and_flush(cc);
 952
 953     cc->npoints = 0;
 954
 955     if (cc->newConnRef) {
 956         cc->newConnRef->removeFromGraph();
 957         delete cc->newConnRef;
 958         cc->newConnRef = NULL;
 959     }
 960     cc->state = SP_CONNECTOR_CONTEXT_IDLE;
 961 }
 962
 963
 964 static gboolean
 965 cc_generic_knot_handler(SPCanvasItem *, GdkEvent *event, SPKnot *knot)
 966 {
 967     g_assert (knot != NULL);
 968
 969     g_object_ref(knot);
 970
 971     SPConnectorContext *cc = SP_CONNECTOR_CONTEXT(
 972             knot->desktop->event_context);
 973
 974     gboolean consumed = FALSE;
 975
 976     switch (event->type) {
 977         case GDK_ENTER_NOTIFY:
 978             sp_knot_set_flag(knot, SP_KNOT_MOUSEOVER, TRUE);
 979
 980             cc->active_handle = knot;
 981
 982             if (knot->tip)
 983             {
 984                 knot->desktop->event_context->defaultMessageContext()->set(
 985                         Inkscape::NORMAL_MESSAGE, knot->tip);
 986             }
 987
 988             consumed = TRUE;
 989             break;
 990         case GDK_LEAVE_NOTIFY:
 991             sp_knot_set_flag(knot, SP_KNOT_MOUSEOVER, FALSE);
 992
 993             cc->active_handle = NULL;
 994
 995             if (knot->tip) {
 996                 knot->desktop->event_context->defaultMessageContext()->clear();
 997             }
 998
 999             consumed = TRUE;
1000             break;
1001         default:
1002             break;
1003     }
1004
1005     g_object_unref(knot);
1006
1007     return consumed;
1008 }
1009
1010
1011 static gboolean
1012 endpt_handler(SPKnot *knot, GdkEvent *event, SPConnectorContext *cc)
1013 {
1014     g_assert( SP_IS_CONNECTOR_CONTEXT(cc) );
1015
1016     gboolean consumed = FALSE;
1017
1018     switch (event->type) {
1019         case GDK_BUTTON_PRESS:
1020             g_assert( (cc->active_handle == cc->endpt_handle[0]) ||
1021                       (cc->active_handle == cc->endpt_handle[1]) );
1022             if (cc->state == SP_CONNECTOR_CONTEXT_IDLE) {
1023                 cc->clickeditem = cc->active_conn;
1024                 cc->clickedhandle = cc->active_handle;
1025                 cc_clear_active_conn(cc);
1026                 cc->state = SP_CONNECTOR_CONTEXT_REROUTING;
1027
1028                 // Disconnect from attached shape
1029                 unsigned ind = (cc->active_handle == cc->endpt_handle[0]) ? 0 : 1;
1030                 sp_conn_end_detach(cc->clickeditem, ind);
1031
1032                 NR::Point origin;
1033                 if (cc->clickedhandle == cc->endpt_handle[0]) {
1034                     origin = cc->endpt_handle[1]->pos;
1035                 }
1036                 else {
1037                     origin = cc->endpt_handle[0]->pos;
1038                 }
1039
1040                 // Show the red path for dragging.
1041                 cc->red_curve = sp_curve_copy(SP_PATH(cc->clickeditem)->curve);
1042                 NR::Matrix i2d = sp_item_i2d_affine(cc->clickeditem);
1043                 sp_curve_transform(cc->red_curve, i2d);
1044                 sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(cc->red_bpath),
1045                         cc->red_curve);
1046
1047                 cc->clickeditem->setHidden(true);
1048
1049                 // The rest of the interaction rerouting the connector is
1050                 // handled by the context root handler.
1051                 consumed = TRUE;
1052             }
1053             break;
1054         default:
1055             break;
1056     }
1057
1058     return consumed;
1059 }
1060
1061
1062 static void cc_set_active_shape(SPConnectorContext *cc, SPItem *item)
1063 {
1064     g_assert(item != NULL );
1065
1066     cc->active_shape = item;
1067
1068     // Remove existing active shape listeners
1069     if (cc->active_shape_repr) {
1070         sp_repr_remove_listener_by_data(cc->active_shape_repr, cc);
1071         Inkscape::GC::release(cc->active_shape_repr);
1072
1073         sp_repr_remove_listener_by_data(cc->active_shape_layer_repr, cc);
1074         Inkscape::GC::release(cc->active_shape_layer_repr);
1075     }
1076
1077     // Listen in case the active shape changes
1078     cc->active_shape_repr = SP_OBJECT_REPR(item);
1079     if (cc->active_shape_repr) {
1080         Inkscape::GC::anchor(cc->active_shape_repr);
1081         sp_repr_add_listener(cc->active_shape_repr, &shape_repr_events, cc);
1082
1083         cc->active_shape_layer_repr = cc->active_shape_repr->parent();
1084         Inkscape::GC::anchor(cc->active_shape_layer_repr);
1085         sp_repr_add_listener(cc->active_shape_layer_repr, &layer_repr_events, cc);
1086     }
1087
1088
1089     // Set center connection point.
1090     if ( cc->connpthandle == NULL ) {
1091         SPKnot *knot = sp_knot_new(cc->desktop,
1092                 _("<b>Connection point</b>: click or drag to create a new connector"));
1093
1094         knot->setShape(SP_KNOT_SHAPE_SQUARE);
1095         knot->setSize(8);
1096         knot->setAnchor(GTK_ANCHOR_CENTER);
1097         knot->setFill(0xffffff00, 0xff0000ff, 0xff0000ff);
1098         sp_knot_update_ctrl(knot);
1099
1100         // We don't want to use the standard knot handler,
1101         //since we don't want this knot to be draggable.
1102         g_signal_handler_disconnect(G_OBJECT(knot->item),
1103                 knot->_event_handler_id);
1104         knot->_event_handler_id = 0;
1105
1106         gtk_signal_connect(GTK_OBJECT(knot->item), "event",
1107                 GTK_SIGNAL_FUNC(cc_generic_knot_handler), knot);
1108
1109         cc->connpthandle = knot;
1110     }
1111
1112
1113     NR::Rect bbox = sp_item_bbox_desktop(cc->active_shape);
1114     NR::Point center = bbox.midpoint();
1115     sp_knot_set_position(cc->connpthandle, &center, 0);
1116
1117     sp_knot_show(cc->connpthandle);
1118
1119 }
1120
1121
1122 static void
1123 cc_set_active_conn(SPConnectorContext *cc, SPItem *item)
1124 {
1125     g_assert( SP_IS_PATH(item) );
1126
1127     SPCurve *curve = SP_SHAPE(SP_PATH(item))->curve;
1128     NR::Matrix i2d = sp_item_i2d_affine(item);
1129
1130     if (cc->active_conn == item)
1131     {
1132         // Just adjust handle positions.
1133         NR::Point startpt = sp_curve_first_point(curve) * i2d;
1134         sp_knot_set_position(cc->endpt_handle[0], &startpt, 0);
1135
1136         NR::Point endpt = sp_curve_last_point(curve) * i2d;
1137         sp_knot_set_position(cc->endpt_handle[1], &endpt, 0);
1138
1139         return;
1140     }
1141
1142     cc->active_conn = item;
1143
1144     // Remove existing active conn listeners
1145     if (cc->active_conn_repr) {
1146         sp_repr_remove_listener_by_data(cc->active_conn_repr, cc);
1147         Inkscape::GC::release(cc->active_conn_repr);
1148         cc->active_conn_repr = NULL;
1149     }
1150
1151     // Listen in case the active conn changes
1152     cc->active_conn_repr = SP_OBJECT_REPR(item);
1153     if (cc->active_conn_repr) {
1154         Inkscape::GC::anchor(cc->active_conn_repr);
1155         sp_repr_add_listener(cc->active_conn_repr, &shape_repr_events, cc);
1156     }
1157
1158     for (int i = 0; i < 2; ++i) {
1159
1160         // Create the handle if it doesn't exist
1161         if ( cc->endpt_handle[i] == NULL ) {
1162             SPKnot *knot = sp_knot_new(cc->desktop,
1163                     _("<b>Connector endpoint</b>: drag to reroute or connect to new shapes"));
1164
1165             knot->setShape(SP_KNOT_SHAPE_SQUARE);
1166             knot->setSize(7);
1167             knot->setAnchor(GTK_ANCHOR_CENTER);
1168             knot->setFill(0xffffff00, 0xff0000ff, 0xff0000ff);
1169             knot->setStroke(0x000000ff, 0x000000ff, 0x000000ff);
1170             sp_knot_update_ctrl(knot);
1171
1172             // We don't want to use the standard knot handler,
1173             //since we don't want this knot to be draggable.
1174             g_signal_handler_disconnect(G_OBJECT(knot->item),
1175                     knot->_event_handler_id);
1176             knot->_event_handler_id = 0;
1177
1178             gtk_signal_connect(GTK_OBJECT(knot->item), "event",
1179                     GTK_SIGNAL_FUNC(cc_generic_knot_handler), knot);
1180
1181             cc->endpt_handle[i] = knot;
1182         }
1183
1184         // Remove any existing handlers
1185         if (cc->endpt_handler_id[i]) {
1186             g_signal_handlers_disconnect_by_func(
1187                     G_OBJECT(cc->endpt_handle[i]->item),
1188                     (void*)G_CALLBACK(endpt_handler), (gpointer) cc );
1189             cc->endpt_handler_id[i] = 0;
1190         }
1191
1192         // Setup handlers for connector endpoints, this is
1193         // is as 'after' so that cc_generic_knot_handler is
1194         // triggered first for any endpoint.
1195         cc->endpt_handler_id[i] = g_signal_connect_after(
1196                 G_OBJECT(cc->endpt_handle[i]->item), "event",
1197                 G_CALLBACK(endpt_handler), cc);
1198     }
1199
1200     NR::Point startpt = sp_curve_first_point(curve) * i2d;
1201     sp_knot_set_position(cc->endpt_handle[0], &startpt, 0);
1202
1203     NR::Point endpt = sp_curve_last_point(curve) * i2d;
1204     sp_knot_set_position(cc->endpt_handle[1], &endpt, 0);
1205
1206     sp_knot_show(cc->endpt_handle[0]);
1207     sp_knot_show(cc->endpt_handle[1]);
1208 }
1209
1210
1211 static bool cc_item_is_shape(SPItem *item)
1212 {
1213     if (SP_IS_PATH(item)) {
1214         SPCurve *curve = (SP_SHAPE(item))->curve;
1215         if ( curve && !(curve->closed) ) {
1216             // Open paths are connectors.
1217             return false;
1218         }
1219     }
1220     else if (SP_IS_TEXT(item) || SP_IS_FLOWTEXT(item)) {
1221         if (prefs_get_int_attribute("tools.connector", "ignoretext", 1) == 1) {
1222             // Don't count text as a shape we can connect connector to.
1223             return false;
1224         }
1225     }
1226     return true;
1227 }
1228
1229
1230 bool cc_item_is_connector(SPItem *item)
1231 {
1232     if (SP_IS_PATH(item)) {
1233         if (SP_PATH(item)->connEndPair.isAutoRoutingConn()) {
1234             g_assert( !(SP_SHAPE(item)->curve->closed) );
1235             return true;
1236         }
1237     }
1238     return false;
1239 }
1240
1241
1242 void cc_selection_set_avoid(bool const set_avoid)
1243 {
1244     SPDesktop *desktop = inkscape_active_desktop();
1245     if (desktop == NULL) {
1246         return;
1247     }
1248
1249     SPDocument *document = sp_desktop_document(desktop);
1250
1251     Inkscape::Selection *selection = sp_desktop_selection(desktop);
1252
1253     GSList *l = (GSList *) selection->itemList();
1254
1255     int changes = 0;
1256
1257     while (l) {
1258         SPItem *item = (SPItem *) l->data;
1259
1260         char const *value = (set_avoid) ? "true" : NULL;
1261
1262         if (cc_item_is_shape(item)) {
1263             sp_object_setAttribute(item, "inkscape:connector-avoid",
1264                     value, false);
1265             item->avoidRef->handleSettingChange();
1266             changes++;
1267         }
1268
1269         l = l->next;
1270     }
1271
1272     if (changes == 0) {
1273         desktop->messageStack()->flash(Inkscape::WARNING_MESSAGE,
1274                 _("Select <b>at least one non-connector object</b>."));
1275         return;
1276     }
1277
1278     char *event_desc = (set_avoid) ?
1279             _("Make connectors avoid selected objects") :
1280             _("Make connectors ignore selected objects");
1281     sp_document_done(document, SP_VERB_CONTEXT_CONNECTOR, event_desc);
1282 }
1283
1284
1285 static void
1286 cc_selection_changed(Inkscape::Selection *selection, gpointer data)
1287 {
1288     SPConnectorContext *cc = SP_CONNECTOR_CONTEXT(data);
1289     //SPEventContext *ec = SP_EVENT_CONTEXT(cc);
1290
1291     SPItem *item = selection->singleItem();
1292
1293     if (cc->active_conn == item)
1294     {
1295         // Nothing to change.
1296         return;
1297     }
1298     if (item == NULL)
1299     {
1300         cc_clear_active_conn(cc);
1301         return;
1302     }
1303
1304     if (cc_item_is_connector(item)) {
1305         cc_set_active_conn(cc, item);
1306     }
1307 }
1308
1309
1310 static void
1311 shape_event_attr_deleted(Inkscape::XML::Node *repr, Inkscape::XML::Node *child,
1312         Inkscape::XML::Node *ref, gpointer data)
1313 {
1314     g_assert(data);
1315     SPConnectorContext *cc = SP_CONNECTOR_CONTEXT(data);
1316
1317     if (child == cc->active_shape_repr) {
1318         // The active shape has been deleted.  Clear active shape.
1319         cc_clear_active_shape(cc);
1320     }
1321 }
1322
1323
1324 static void
1325 shape_event_attr_changed(Inkscape::XML::Node *repr, gchar const *name,
1326                             gchar const *old_value, gchar const *new_value,
1327                             bool is_interactive, gpointer data)
1328 {
1329     g_assert(data);
1330     SPConnectorContext *cc = SP_CONNECTOR_CONTEXT(data);
1331
1332     // Look for changes than result in onscreen movement.
1333     if (!strcmp(name, "d") || !strcmp(name, "x") || !strcmp(name, "y") ||
1334             !strcmp(name, "width") || !strcmp(name, "height") ||
1335             !strcmp(name, "transform"))
1336     {
1337         if (repr == cc->active_shape_repr) {
1338             // Active shape has moved. Clear active shape.
1339             cc_clear_active_shape(cc);
1340         }
1341         else if (repr == cc->active_conn_repr) {
1342             // The active conn has been moved.
1343             // Set it again, which just sets new handle positions.
1344             cc_set_active_conn(cc, cc->active_conn);
1345         }
1346     }
1347 }
1348
1349
1350 /*
1351   Local Variables:
1352   mode:c++
1353   c-file-style:"stroustrup"
1354   c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
1355   indent-tabs-mode:nil
1356   fill-column:99
1357   End:
1358 */
1359 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :