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 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  */
  42
  43 #include <gdk/gdkkeysyms.h>
  44
  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
  71
  72
  73 static void sp_connector_context_class_init(SPConnectorContextClass *klass);
  74 static void sp_connector_context_init(SPConnectorContext *conn_context);
  75 static void sp_connector_context_dispose(GObject *object);
  76
  77 static void sp_connector_context_setup(SPEventContext *ec);
  78 static void sp_connector_context_finish(SPEventContext *ec);
  79 static gint sp_connector_context_root_handler(SPEventContext *ec, GdkEvent *event);
  80 static gint sp_connector_context_item_handler(SPEventContext *event_context, SPItem *item, GdkEvent *event);
  81
  82 // Stuff borrowed from DrawContext
  83 static void spcc_connector_set_initial_point(SPConnectorContext *cc, NR::Point const p);
  84 static void spcc_connector_set_subsequent_point(SPConnectorContext *cc, NR::Point const p);
  85 static void spcc_connector_finish_segment(SPConnectorContext *cc, NR::Point p);
  86 static void spcc_reset_colors(SPConnectorContext *cc);
  87 static void spcc_connector_finish(SPConnectorContext *cc);
  88 static void spcc_concat_colors_and_flush(SPConnectorContext *cc);
  89 static void spcc_flush_white(SPConnectorContext *cc, SPCurve *gc);
  90
  91 // Context event handlers
  92 static gint connector_handle_button_press(SPConnectorContext *const cc, GdkEventButton const &bevent);
  93 static gint connector_handle_motion_notify(SPConnectorContext *const cc, GdkEventMotion const &mevent);
  94 static gint connector_handle_button_release(SPConnectorContext *const cc, GdkEventButton const &revent);
  95 static gint connector_handle_key_press(SPConnectorContext *const cc, guint const keyval);
  96
  97 static void cc_set_active_shape(SPConnectorContext *cc, SPItem *item);
  98 static void cc_clear_active_shape(SPConnectorContext *cc);
  99 static void cc_set_active_conn(SPConnectorContext *cc, SPItem *item);
 100 static void cc_clear_active_conn(SPConnectorContext *cc);
 101 static gchar *conn_pt_handle_test(SPConnectorContext *cc, NR::Point& w);
 102 static bool cc_item_is_shape(SPItem *item);
 103 static void cc_selection_changed(Inkscape::Selection *selection, gpointer data);
 104
 105 static void shape_event_attr_deleted(Inkscape::XML::Node *repr,
 106         Inkscape::XML::Node *child, Inkscape::XML::Node *ref, gpointer data);
 107 static void shape_event_attr_changed(Inkscape::XML::Node *repr, gchar const *name,
 108         gchar const *old_value, gchar const *new_value, bool is_interactive,
 109         gpointer data);
 110
 111
 112 static NR::Point connector_drag_origin_w(0, 0);
 113 static bool connector_within_tolerance = false;
 114 static SPEventContextClass *parent_class;
 115
 116
 117 static Inkscape::XML::NodeEventVector shape_repr_events = {
 118     NULL, /* child_added */
 119     NULL, /* child_added */
 120     shape_event_attr_changed,
 121     NULL, /* content_changed */
 122     NULL  /* order_changed */
 123 };
 124
 125 static Inkscape::XML::NodeEventVector layer_repr_events = {
 126     NULL, /* child_added */
 127     shape_event_attr_deleted,
 128     NULL, /* child_added */
 129     NULL, /* content_changed */
 130     NULL  /* order_changed */
 131 };
 132
 133
 134 GType
 135 sp_connector_context_get_type(void)
 136 {
 137     static GType type = 0;
 138     if (!type) {
 139         GTypeInfo info = {
 140             sizeof(SPConnectorContextClass),
 141             NULL, NULL,
 142             (GClassInitFunc) sp_connector_context_class_init,
 143             NULL, NULL,
 144             sizeof(SPConnectorContext),
 145             4,
 146             (GInstanceInitFunc) sp_connector_context_init,
 147             NULL,   /* value_table */
 148         };
 149         type = g_type_register_static(SP_TYPE_EVENT_CONTEXT, "SPConnectorContext", &info, (GTypeFlags)0);
 150     }
 151     return type;
 152 }
 153
 154 static void
 155 sp_connector_context_class_init(SPConnectorContextClass *klass)
 156 {
 157     GObjectClass *object_class;
 158     SPEventContextClass *event_context_class;
 159
 160     object_class = (GObjectClass *) klass;
 161     event_context_class = (SPEventContextClass *) klass;
 162
 163     parent_class = (SPEventContextClass*)g_type_class_peek_parent(klass);
 164
 165     object_class->dispose = sp_connector_context_dispose;
 166
 167     event_context_class->setup = sp_connector_context_setup;
 168     event_context_class->finish = sp_connector_context_finish;
 169     event_context_class->root_handler = sp_connector_context_root_handler;
 170     event_context_class->item_handler = sp_connector_context_item_handler;
 171 }
 172
 173
 174 static void
 175 sp_connector_context_init(SPConnectorContext *cc)
 176 {
 177     SPEventContext *ec = SP_EVENT_CONTEXT(cc);
 178
 179     ec->cursor_shape = cursor_connector_xpm;
 180     ec->hot_x = 1;
 181     ec->hot_y = 1;
 182     ec->xp = 0;
 183     ec->yp = 0;
 184
 185     cc->red_color = 0xff00007f;
 186
 187     cc->newconn = NULL;
 188     cc->newConnRef = NULL;
 189
 190     cc->sel_changed_connection = sigc::connection();
 191
 192     cc->active_shape = NULL;
 193     cc->active_shape_repr = NULL;
 194     cc->active_shape_layer_repr = NULL;
 195
 196     cc->active_conn = NULL;
 197     cc->active_conn_repr = NULL;
 198
 199     cc->active_handle = NULL;
 200
 201     cc->clickeditem = NULL;
 202     cc->clickedhandle = NULL;
 203
 204     cc->connpthandle = NULL;
 205     for (int i = 0; i < 2; ++i) {
 206         cc->endpt_handle[i] = NULL;
 207         cc->endpt_handler_id[i] = 0;
 208     }
 209     cc->sid = NULL;
 210     cc->eid = NULL;
 211     cc->npoints = 0;
 212     cc->state = SP_CONNECTOR_CONTEXT_IDLE;
 213 }
 214
 215
 216 static void
 217 sp_connector_context_dispose(GObject *object)
 218 {
 219     SPConnectorContext *cc = SP_CONNECTOR_CONTEXT(object);
 220
 221     cc->sel_changed_connection.disconnect();
 222
 223     if (cc->connpthandle) {
 224         g_object_unref(cc->connpthandle);
 225         cc->connpthandle = NULL;
 226     }
 227     for (int i = 0; i < 2; ++i) {
 228         if (cc->endpt_handle[1]) {
 229             g_object_unref(cc->endpt_handle[i]);
 230             cc->endpt_handle[i] = NULL;
 231         }
 232     }
 233     if (cc->sid) {
 234         g_free(cc->sid);
 235         cc->sid = NULL;
 236     }
 237     if (cc->eid) {
 238         g_free(cc->eid);
 239         cc->eid = NULL;
 240     }
 241     g_assert( cc->newConnRef == NULL );
 242
 243     G_OBJECT_CLASS(parent_class)->dispose(object);
 244 }
 245
 246
 247 static void
 248 sp_connector_context_setup(SPEventContext *ec)
 249 {
 250     SPConnectorContext *cc = SP_CONNECTOR_CONTEXT(ec);
 251     SPDesktop *dt = ec->desktop;
 252
 253     if (((SPEventContextClass *) parent_class)->setup) {
 254         ((SPEventContextClass *) parent_class)->setup(ec);
 255     }
 256
 257     cc->selection = SP_DT_SELECTION(dt);
 258
 259     cc->sel_changed_connection.disconnect();
 260     cc->sel_changed_connection = cc->selection->connectChanged(
 261             sigc::bind(sigc::ptr_fun(&cc_selection_changed),
 262             (gpointer) cc));
 263
 264     /* Create red bpath */
 265     cc->red_bpath = sp_canvas_bpath_new(SP_DT_SKETCH(ec->desktop), NULL);
 266     sp_canvas_bpath_set_stroke(SP_CANVAS_BPATH(cc->red_bpath), cc->red_color,
 267             1.0, SP_STROKE_LINEJOIN_MITER, SP_STROKE_LINECAP_BUTT);
 268     sp_canvas_bpath_set_fill(SP_CANVAS_BPATH(cc->red_bpath), 0x00000000,
 269             SP_WIND_RULE_NONZERO);
 270     /* Create red curve */
 271     cc->red_curve = sp_curve_new_sized(4);
 272
 273     /* Create green curve */
 274     cc->green_curve = sp_curve_new_sized(64);
 275
 276     // Notice the initial selection.
 277     cc_selection_changed(cc->selection, (gpointer) cc);
 278
 279     if (prefs_get_int_attribute("tools.connector", "selcue", 0) != 0) {
 280         ec->enableSelectionCue();
 281     }
 282 }
 283
 284
 285 static void
 286 sp_connector_context_finish(SPEventContext *ec)
 287 {
 288     SPConnectorContext *cc = SP_CONNECTOR_CONTEXT(ec);
 289
 290     spcc_connector_finish(cc);
 291
 292     if (((SPEventContextClass *) parent_class)->finish) {
 293         ((SPEventContextClass *) parent_class)->finish(ec);
 294     }
 295
 296     if (cc->selection) {
 297         cc->selection = NULL;
 298     }
 299     cc_clear_active_shape(cc);
 300     cc_clear_active_conn(cc);
 301 }
 302
 303
 304 //-----------------------------------------------------------------------------
 305
 306
 307 static void
 308 cc_clear_active_shape(SPConnectorContext *cc)
 309 {
 310     if (cc->active_shape == NULL) {
 311         return;
 312     }
 313     g_assert( cc->active_shape_repr );
 314     g_assert( cc->active_shape_layer_repr );
 315
 316     cc->active_shape = NULL;
 317
 318     if (cc->active_shape_repr) {
 319         sp_repr_remove_listener_by_data(cc->active_shape_repr, cc);
 320         Inkscape::GC::release(cc->active_shape_repr);
 321         cc->active_shape_repr = NULL;
 322
 323         sp_repr_remove_listener_by_data(cc->active_shape_layer_repr, cc);
 324         Inkscape::GC::release(cc->active_shape_layer_repr);
 325         cc->active_shape_layer_repr = NULL;
 326     }
 327
 328     // Hide the center connection point if it exists.
 329     if (cc->connpthandle) {
 330         sp_knot_hide(cc->connpthandle);
 331     }
 332 }
 333
 334
 335 static void
 336 cc_clear_active_conn(SPConnectorContext *cc)
 337 {
 338     if (cc->active_conn == NULL) {
 339         return;
 340     }
 341     g_assert( cc->active_conn_repr );
 342
 343     cc->active_conn = NULL;
 344
 345     if (cc->active_conn_repr) {
 346         sp_repr_remove_listener_by_data(cc->active_conn_repr, cc);
 347         Inkscape::GC::release(cc->active_conn_repr);
 348         cc->active_conn_repr = NULL;
 349     }
 350
 351     // Hide the endpoint handles.
 352     for (int i = 0; i < 2; ++i) {
 353         if (cc->endpt_handle[i]) {
 354             sp_knot_hide(cc->endpt_handle[i]);
 355         }
 356     }
 357 }
 358
 359
 360 static gchar *
 361 conn_pt_handle_test(SPConnectorContext *cc, NR::Point& p)
 362 {
 363     // TODO: this will need to change when there are more connection
 364     //       points available for each shape.
 365
 366     SPKnot *centerpt = cc->connpthandle;
 367     if (cc->active_handle && (cc->active_handle == centerpt))
 368     {
 369         p = centerpt->pos;
 370         return g_strdup_printf("#%s", SP_OBJECT_ID(cc->active_shape));
 371     }
 372     return NULL;
 373 }
 374
 375
 376
 377 static gint
 378 sp_connector_context_item_handler(SPEventContext *ec, SPItem *item, GdkEvent *event)
 379 {
 380     gint ret = FALSE;
 381
 382     SPDesktop *desktop = ec->desktop;
 383
 384     SPConnectorContext *cc = SP_CONNECTOR_CONTEXT(ec);
 385
 386     NR::Point p(event->button.x, event->button.y);
 387
 388     switch (event->type) {
 389         case GDK_BUTTON_RELEASE:
 390             if (event->button.button == 1) {
 391                 if ((cc->state == SP_CONNECTOR_CONTEXT_DRAGGING) &&
 392                         (connector_within_tolerance))
 393                 {
 394                     spcc_reset_colors(cc);
 395                     cc->state = SP_CONNECTOR_CONTEXT_IDLE;
 396                 }
 397                 if (cc->state != SP_CONNECTOR_CONTEXT_IDLE) {
 398                     // Doing simething else like rerouting.
 399                     break;
 400                 }
 401                 // find out clicked item, disregarding groups, honoring Alt
 402                 SPItem *item_ungrouped = sp_event_context_find_item(desktop,
 403                         p, event->button.state & GDK_MOD1_MASK, TRUE);
 404
 405                 if (event->button.state & GDK_SHIFT_MASK) {
 406                     cc->selection->toggle(item_ungrouped);
 407                 } else {
 408                     cc->selection->set(item_ungrouped);
 409                 }
 410                 ret = TRUE;
 411             }
 412             break;
 413         case GDK_ENTER_NOTIFY:
 414         {
 415             if (cc_item_is_shape(item)) {
 416                 // This is a shape, so show connection point(s).
 417                 if (!(cc->active_shape) ||
 418                         // Don't show handle for another handle.
 419                         (item != ((SPItem *) cc->connpthandle))) {
 420                     cc_set_active_shape(cc, item);
 421                 }
 422             }
 423             ret = TRUE;
 424             break;
 425         }
 426         default:
 427             break;
 428     }
 429
 430     return ret;
 431 }
 432
 433
 434 gint
 435 sp_connector_context_root_handler(SPEventContext *ec, GdkEvent *event)
 436 {
 437     SPConnectorContext *const cc = SP_CONNECTOR_CONTEXT(ec);
 438
 439     gint ret = FALSE;
 440
 441     switch (event->type) {
 442         case GDK_BUTTON_PRESS:
 443             ret = connector_handle_button_press(cc, event->button);
 444             break;
 445
 446         case GDK_MOTION_NOTIFY:
 447             ret = connector_handle_motion_notify(cc, event->motion);
 448             break;
 449
 450         case GDK_BUTTON_RELEASE:
 451             ret = connector_handle_button_release(cc, event->button);
 452             break;
 453         case GDK_KEY_PRESS:
 454             ret = connector_handle_key_press(cc, get_group0_keyval (&event->key));
 455             break;
 456
 457         default:
 458             break;
 459     }
 460
 461     if (!ret) {
 462         gint (*const parent_root_handler)(SPEventContext *, GdkEvent *)
 463             = ((SPEventContextClass *) parent_class)->root_handler;
 464         if (parent_root_handler) {
 465             ret = parent_root_handler(ec, event);
 466         }
 467     }
 468
 469     return ret;
 470 }
 471
 472
 473 static gint
 474 connector_handle_button_press(SPConnectorContext *const cc, GdkEventButton const &bevent)
 475 {
 476     NR::Point const event_w(bevent.x, bevent.y);
 477     /* Find desktop coordinates */
 478     NR::Point p = cc->desktop->w2d(event_w);
 479
 480     gint ret = FALSE;
 481     if ( bevent.button == 1 ) {
 482
 483         SPDesktop *desktop = SP_EVENT_CONTEXT_DESKTOP(cc);
 484
 485         if (Inkscape::have_viable_layer(desktop, cc->_message_context) == false) {
 486             return TRUE;
 487         }
 488
 489         NR::Point const event_w(bevent.x,
 490                                 bevent.y);
 491         connector_drag_origin_w = event_w;
 492         connector_within_tolerance = true;
 493
 494         NR::Point const event_dt = cc->desktop->w2d(event_w);
 495         switch (cc->state) {
 496             case SP_CONNECTOR_CONTEXT_STOP:
 497                 /* This is allowed, if we just cancelled curve */
 498             case SP_CONNECTOR_CONTEXT_IDLE:
 499             {
 500                 if ( cc->npoints == 0 ) {
 501                     /* Set start anchor */
 502                     NR::Point p;
 503
 504                     cc_clear_active_conn(cc);
 505
 506                     SP_EVENT_CONTEXT_DESKTOP(cc)->messageStack()->flash(Inkscape::NORMAL_MESSAGE, _("Creating new connector"));
 507
 508                     /* Create green anchor */
 509                     p = event_dt;
 510
 511                     // Test whether we clicked on a connection point
 512                     cc->sid = conn_pt_handle_test(cc, p);
 513
 514                     if (!cc->sid) {
 515                         // This is the first point, so just snap it to the grid
 516                         // as there's no other points to go off.
 517                         SnapManager const m(cc->desktop->namedview);
 518                         p = m.freeSnap(Inkscape::Snapper::SNAP_POINT | Inkscape::Snapper::BBOX_POINT,
 519                                        p, NULL).getPoint();
 520                     }
 521                     spcc_connector_set_initial_point(cc, p);
 522
 523                 }
 524                 cc->state = SP_CONNECTOR_CONTEXT_DRAGGING;
 525                 ret = TRUE;
 526                 break;
 527             }
 528             case SP_CONNECTOR_CONTEXT_DRAGGING:
 529             {
 530                 // This is the second click of a connector creation.
 531
 532                 spcc_connector_set_subsequent_point(cc, p);
 533                 spcc_connector_finish_segment(cc, p);
 534                 // Test whether we clicked on a connection point
 535                 cc->eid = conn_pt_handle_test(cc, p);
 536                 if (cc->npoints != 0) {
 537                     spcc_connector_finish(cc);
 538                 }
 539                 cc_set_active_conn(cc, cc->newconn);
 540                 cc->state = SP_CONNECTOR_CONTEXT_IDLE;
 541                 ret = TRUE;
 542                 break;
 543             }
 544             case SP_CONNECTOR_CONTEXT_CLOSE:
 545             {
 546                 g_warning("Button down in CLOSE state");
 547                 break;
 548             }
 549             default:
 550                 break;
 551         }
 552     } else if (bevent.button == 3) {
 553         if (cc->npoints != 0) {
 554             spcc_connector_finish(cc);
 555             ret = TRUE;
 556         }
 557     }
 558     return ret;
 559 }
 560
 561
 562 static gint
 563 connector_handle_motion_notify(SPConnectorContext *const cc, GdkEventMotion const &mevent)
 564 {
 565     gint ret = FALSE;
 566
 567     if (mevent.state & GDK_BUTTON2_MASK || mevent.state & GDK_BUTTON3_MASK) {
 568         // allow middle-button scrolling
 569         return FALSE;
 570     }
 571
 572     NR::Point const event_w(mevent.x, mevent.y);
 573
 574     if (connector_within_tolerance) {
 575         gint const tolerance = prefs_get_int_attribute_limited("options.dragtolerance",
 576                                                                "value", 0, 0, 100);
 577         if ( NR::LInfty( event_w - connector_drag_origin_w ) < tolerance ) {
 578             return FALSE;   // Do not drag if we're within tolerance from origin.
 579         }
 580     }
 581     // Once the user has moved farther than tolerance from the original location
 582     // (indicating they intend to move the object, not click), then always process
 583     // the motion notify coordinates as given (no snapping back to origin)
 584     connector_within_tolerance = false;
 585
 586     SPDesktop *const dt = cc->desktop;
 587
 588     /* Find desktop coordinates */
 589     NR::Point p = dt->w2d(event_w);
 590
 591     switch (cc->state) {
 592         case SP_CONNECTOR_CONTEXT_DRAGGING:
 593         {
 594             // This is movement during a connector creation.
 595
 596             if ( cc->npoints > 0 ) {
 597                 cc->selection->clear();
 598                 spcc_connector_set_subsequent_point(cc, p);
 599                 ret = TRUE;
 600             }
 601             break;
 602         }
 603         case SP_CONNECTOR_CONTEXT_REROUTING:
 604         {
 605             g_assert( SP_IS_PATH(cc->clickeditem));
 606
 607             // Update the hidden path
 608             NR::Matrix i2d = sp_item_i2d_affine(cc->clickeditem);
 609             NR::Matrix d2i = i2d.inverse();
 610             SPPath *path = SP_PATH(cc->clickeditem);
 611             SPCurve *curve = (SP_SHAPE(path))->curve;
 612             if (cc->clickedhandle == cc->endpt_handle[0]) {
 613                 NR::Point o = cc->endpt_handle[1]->pos;
 614                 sp_curve_stretch_endpoints(curve, p * d2i, o * d2i);
 615             }
 616             else {
 617                 NR::Point o = cc->endpt_handle[0]->pos;
 618                 sp_curve_stretch_endpoints(curve, o * d2i, p * d2i);
 619             }
 620             sp_conn_adjust_path(path);
 621
 622             // Copy this to the temporary visible path
 623             cc->red_curve = sp_curve_copy(SP_SHAPE(path)->curve);
 624             sp_curve_transform(cc->red_curve, i2d);
 625
 626             sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(cc->red_bpath), cc->red_curve);
 627             ret = TRUE;
 628             break;
 629         }
 630         case SP_CONNECTOR_CONTEXT_STOP:
 631             /* This is perfectly valid */
 632             break;
 633         default:
 634             break;
 635     }
 636
 637     return ret;
 638 }
 639
 640
 641 static gint
 642 connector_handle_button_release(SPConnectorContext *const cc, GdkEventButton const &revent)
 643 {
 644     gint ret = FALSE;
 645     if ( revent.button == 1 ) {
 646
 647         SPDesktop *desktop = SP_EVENT_CONTEXT_DESKTOP(cc);
 648         SPDocument *doc = SP_DT_DOCUMENT(desktop);
 649
 650         NR::Point const event_w(revent.x, revent.y);
 651
 652         /* Find desktop coordinates */
 653         NR::Point p = cc->desktop->w2d(event_w);
 654
 655         switch (cc->state) {
 656             //case SP_CONNECTOR_CONTEXT_POINT:
 657             case SP_CONNECTOR_CONTEXT_DRAGGING:
 658             {
 659                 if (connector_within_tolerance)
 660                 {
 661                     spcc_connector_finish_segment(cc, p);
 662                     return TRUE;
 663                 }
 664                 // Connector has been created via a drag, end it now.
 665                 spcc_connector_set_subsequent_point(cc, p);
 666                 spcc_connector_finish_segment(cc, p);
 667                 // Test whether we clicked on a connection point
 668                 cc->eid = conn_pt_handle_test(cc, p);
 669                 if (cc->npoints != 0) {
 670                     spcc_connector_finish(cc);
 671                 }
 672                 cc_set_active_conn(cc, cc->newconn);
 673                 cc->state = SP_CONNECTOR_CONTEXT_IDLE;
 674                 break;
 675             }
 676             case SP_CONNECTOR_CONTEXT_REROUTING:
 677             {
 678                 // Clear the temporary path:
 679                 sp_curve_reset(cc->red_curve);
 680                 sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(cc->red_bpath), NULL);
 681
 682                 // Test whether we clicked on a connection point
 683                 gchar *shape_label = conn_pt_handle_test(cc, p);
 684
 685                 if (shape_label) {
 686                     if (cc->clickedhandle == cc->endpt_handle[0]) {
 687                         sp_object_setAttribute(cc->clickeditem,
 688                                 "inkscape:connection-start",shape_label, false);
 689                     }
 690                     else {
 691                         sp_object_setAttribute(cc->clickeditem,
 692                                 "inkscape:connection-end",shape_label, false);
 693                     }
 694                     g_free(shape_label);
 695                 }
 696                 cc->clickeditem->setHidden(false);
 697                 sp_conn_adjust_path(SP_PATH(cc->clickeditem));
 698                 cc->clickeditem->updateRepr();
 699                 sp_document_done(doc);
 700                 cc_set_active_conn(cc, cc->clickeditem);
 701                 sp_document_ensure_up_to_date(doc);
 702                 cc->state = SP_CONNECTOR_CONTEXT_IDLE;
 703                 return TRUE;
 704                 break;
 705             }
 706             case SP_CONNECTOR_CONTEXT_STOP:
 707                 /* This is allowed, if we just cancelled curve */
 708                 break;
 709             default:
 710                 break;
 711         }
 712         ret = TRUE;
 713     }
 714
 715     return ret;
 716 }
 717
 718
 719 static gint
 720 connector_handle_key_press(SPConnectorContext *const cc, guint const keyval)
 721 {
 722     gint ret = FALSE;
 723     /* fixme: */
 724     switch (keyval) {
 725         case GDK_Return:
 726         case GDK_KP_Enter:
 727             if (cc->npoints != 0) {
 728                 spcc_connector_finish(cc);
 729                 ret = TRUE;
 730             }
 731             break;
 732         case GDK_Escape:
 733             if (cc->npoints != 0) {
 734                 // if drawing, cancel, otherwise pass it up for deselecting
 735                 cc->state = SP_CONNECTOR_CONTEXT_STOP;
 736                 spcc_reset_colors(cc);
 737                 ret = TRUE;
 738             }
 739             break;
 740         default:
 741             break;
 742     }
 743     return ret;
 744 }
 745
 746
 747 static void
 748 spcc_reset_colors(SPConnectorContext *cc)
 749 {
 750     /* Red */
 751     sp_curve_reset(cc->red_curve);
 752     sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(cc->red_bpath), NULL);
 753
 754     sp_curve_reset(cc->green_curve);
 755     cc->npoints = 0;
 756 }
 757
 758
 759 static void
 760 spcc_connector_set_initial_point(SPConnectorContext *const cc, NR::Point const p)
 761 {
 762     g_assert( cc->npoints == 0 );
 763
 764     cc->p[0] = p;
 765     cc->p[1] = p;
 766     cc->npoints = 2;
 767     sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(cc->red_bpath), NULL);
 768 }
 769
 770
 771 static void
 772 spcc_connector_set_subsequent_point(SPConnectorContext *const cc, NR::Point const p)
 773 {
 774     g_assert( cc->npoints != 0 );
 775
 776     SPDesktop *dt = cc->desktop;
 777     NR::Point o = dt->dt2doc(cc->p[0]);
 778     NR::Point d = dt->dt2doc(p);
 779     Avoid::Point src = { o[NR::X], o[NR::Y] };
 780     Avoid::Point dst = { d[NR::X], d[NR::Y] };
 781
 782     if (!cc->newConnRef) {
 783         cc->newConnRef = new Avoid::ConnRef(0, src, dst);
 784         cc->newConnRef->updateEndPoint(Avoid::VertID::src, src);
 785     }
 786     cc->newConnRef->updateEndPoint(Avoid::VertID::tar, dst);
 787
 788     cc->newConnRef->makePathInvalid();
 789     cc->newConnRef->generatePath(src, dst);
 790
 791     Avoid::PolyLine route = cc->newConnRef->route();
 792     cc->newConnRef->calcRouteDist();
 793
 794     sp_curve_reset(cc->red_curve);
 795     NR::Point pt(route.ps[0].x, route.ps[0].y);
 796     sp_curve_moveto(cc->red_curve, pt);
 797
 798     for (int i = 1; i < route.pn; ++i) {
 799         NR::Point p(route.ps[i].x, route.ps[i].y);
 800         sp_curve_lineto(cc->red_curve, p);
 801     }
 802     sp_curve_transform(cc->red_curve, dt->doc2dt());
 803     sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(cc->red_bpath), cc->red_curve);
 804 }
 805
 806
 807 /**
 808  * Concats red, blue and green.
 809  * If any anchors are defined, process these, optionally removing curves from white list
 810  * Invoke _flush_white to write result back to object.
 811  */
 812 static void
 813 spcc_concat_colors_and_flush(SPConnectorContext *cc)
 814 {
 815     SPCurve *c = cc->green_curve;
 816     cc->green_curve = sp_curve_new_sized(64);
 817
 818     sp_curve_reset(cc->red_curve);
 819     sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(cc->red_bpath), NULL);
 820
 821     if (sp_curve_empty(c)) {
 822         sp_curve_unref(c);
 823         return;
 824     }
 825
 826     spcc_flush_white(cc, c);
 827
 828     sp_curve_unref(c);
 829 }
 830
 831
 832 /*
 833  * Flushes white curve(s) and additional curve into object
 834  *
 835  * No cleaning of colored curves - this has to be done by caller
 836  * No rereading of white data, so if you cannot rely on ::modified, do it in caller
 837  *
 838  */
 839
 840 static void
 841 spcc_flush_white(SPConnectorContext *cc, SPCurve *gc)
 842 {
 843     SPCurve *c;
 844
 845     if (gc) {
 846         c = gc;
 847         sp_curve_ref(c);
 848     } else {
 849         return;
 850     }
 851
 852     /* Now we have to go back to item coordinates at last */
 853     sp_curve_transform(c,
 854             sp_desktop_dt2root_affine(SP_EVENT_CONTEXT_DESKTOP(cc)));
 855
 856     SPDesktop *desktop = SP_EVENT_CONTEXT_DESKTOP(cc);
 857     SPDocument *doc = SP_DT_DOCUMENT(desktop);
 858
 859     if ( c && !sp_curve_empty(c) ) {
 860         /* We actually have something to write */
 861
 862         Inkscape::XML::Node *repr = sp_repr_new("svg:path");
 863         /* Set style */
 864         sp_desktop_apply_style_tool(desktop, repr, "tools.connector", false);
 865
 866         gchar *str = sp_svg_write_path(SP_CURVE_BPATH(c));
 867         g_assert( str != NULL );
 868         repr->setAttribute("d", str);
 869         g_free(str);
 870
 871         /* Attach repr */
 872         cc->newconn = SP_ITEM(desktop->currentLayer()->appendChildRepr(repr));
 873         cc->selection->set(repr);
 874         Inkscape::GC::release(repr);
 875         cc->newconn->transform = i2i_affine(desktop->currentRoot(), desktop->currentLayer());
 876         cc->newconn->updateRepr();
 877
 878         bool connection = false;
 879         sp_object_setAttribute(cc->newconn, "inkscape:connector-type",
 880                 "polyline", false);
 881         if (cc->sid)
 882         {
 883             sp_object_setAttribute(cc->newconn, "inkscape:connection-start",
 884                     cc->sid, false);
 885             connection = true;
 886         }
 887
 888         if (cc->eid)
 889         {
 890             sp_object_setAttribute(cc->newconn, "inkscape:connection-end",
 891                     cc->eid, false);
 892             connection = true;
 893         }
 894         cc->newconn->updateRepr();
 895         if (connection) {
 896             // Adjust endpoints to shape edge.
 897             sp_conn_adjust_path(SP_PATH(cc->newconn));
 898         }
 899         cc->newconn->updateRepr();
 900     }
 901
 902     sp_curve_unref(c);
 903
 904     /* Flush pending updates */
 905     sp_document_done(doc);
 906     sp_document_ensure_up_to_date(doc);
 907 }
 908
 909
 910 static void
 911 spcc_connector_finish_segment(SPConnectorContext *const cc, NR::Point const p)
 912 {
 913     if (!sp_curve_empty(cc->red_curve)) {
 914         sp_curve_append_continuous(cc->green_curve, cc->red_curve, 0.0625);
 915
 916         cc->p[0] = cc->p[3];
 917         cc->p[1] = cc->p[4];
 918         cc->npoints = 2;
 919
 920         sp_curve_reset(cc->red_curve);
 921     }
 922 }
 923
 924
 925 static void
 926 spcc_connector_finish(SPConnectorContext *const cc)
 927 {
 928     SPDesktop *const desktop = cc->desktop;
 929     desktop->messageStack()->flash(Inkscape::NORMAL_MESSAGE, _("Finishing connector"));
 930
 931     sp_curve_reset(cc->red_curve);
 932     spcc_concat_colors_and_flush(cc);
 933
 934     cc->npoints = 0;
 935
 936     if (cc->newConnRef) {
 937         cc->newConnRef->removeFromGraph();
 938         delete cc->newConnRef;
 939         cc->newConnRef = NULL;
 940     }
 941     cc->state = SP_CONNECTOR_CONTEXT_IDLE;
 942 }
 943
 944
 945 static gboolean
 946 cc_generic_knot_handler(SPCanvasItem *, GdkEvent *event, SPKnot *knot)
 947 {
 948     g_assert (knot != NULL);
 949
 950     SPConnectorContext *cc = SP_CONNECTOR_CONTEXT(
 951             knot->desktop->event_context);
 952
 953     gboolean consumed = FALSE;
 954
 955     switch (event->type) {
 956         case GDK_ENTER_NOTIFY:
 957             gtk_object_set (GTK_OBJECT (knot->item), "fill_color",
 958                     knot->fill [SP_KNOT_STATE_MOUSEOVER], NULL);
 959             gtk_object_set (GTK_OBJECT (knot->item), "stroke_color",
 960                     knot->stroke [SP_KNOT_STATE_MOUSEOVER], NULL);
 961
 962             cc->active_handle = knot;
 963
 964             if (knot->tip)
 965             {
 966                 knot->desktop->event_context->defaultMessageContext()->set(
 967                         Inkscape::NORMAL_MESSAGE, knot->tip);
 968             }
 969
 970             consumed = TRUE;
 971             break;
 972         case GDK_LEAVE_NOTIFY:
 973             gtk_object_set (GTK_OBJECT (knot->item), "fill_color",
 974                     knot->fill [SP_KNOT_STATE_NORMAL], NULL);
 975             gtk_object_set (GTK_OBJECT (knot->item), "stroke_color",
 976                     knot->stroke [SP_KNOT_STATE_NORMAL], NULL);
 977
 978             cc->active_handle = NULL;
 979
 980             if (knot->tip) {
 981                 knot->desktop->event_context->defaultMessageContext()->clear();
 982             }
 983
 984             consumed = TRUE;
 985             break;
 986         default:
 987             break;
 988     }
 989
 990     return consumed;
 991 }
 992
 993
 994 static gboolean
 995 endpt_handler(SPKnot *knot, GdkEvent *event, SPConnectorContext *cc)
 996 {
 997     g_assert( SP_IS_CONNECTOR_CONTEXT(cc) );
 998
 999     gboolean consumed = FALSE;
1000
1001     switch (event->type) {
1002         case GDK_BUTTON_PRESS:
1003             g_assert( (cc->active_handle == cc->endpt_handle[0]) ||
1004                       (cc->active_handle == cc->endpt_handle[1]) );
1005             if (cc->state == SP_CONNECTOR_CONTEXT_IDLE) {
1006                 cc->clickeditem = cc->active_conn;
1007                 cc->clickedhandle = cc->active_handle;
1008                 cc_clear_active_conn(cc);
1009                 cc->state = SP_CONNECTOR_CONTEXT_REROUTING;
1010
1011                 // Disconnect from attached shape
1012                 unsigned ind = (cc->active_handle == cc->endpt_handle[0]) ? 0 : 1;
1013                 sp_conn_end_detach(cc->clickeditem, ind);
1014
1015                 NR::Point origin;
1016                 if (cc->clickedhandle == cc->endpt_handle[0]) {
1017                     origin = cc->endpt_handle[1]->pos;
1018                 }
1019                 else {
1020                     origin = cc->endpt_handle[0]->pos;
1021                 }
1022
1023                 // Show the red path for dragging.
1024                 cc->red_curve = sp_curve_copy(SP_PATH(cc->clickeditem)->curve);
1025                 NR::Matrix i2d = sp_item_i2d_affine(cc->clickeditem);
1026                 sp_curve_transform(cc->red_curve, i2d);
1027                 sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(cc->red_bpath),
1028                         cc->red_curve);
1029
1030                 cc->clickeditem->setHidden(true);
1031
1032                 // The rest of the interaction rerouting the connector is
1033                 // handled by the context root handler.
1034                 consumed = TRUE;
1035             }
1036             break;
1037         default:
1038             break;
1039     }
1040
1041     return consumed;
1042 }
1043
1044
1045 static void cc_set_active_shape(SPConnectorContext *cc, SPItem *item)
1046 {
1047     g_assert(item != NULL );
1048
1049     cc->active_shape = item;
1050
1051     // Remove existing active shape listeners
1052     if (cc->active_shape_repr) {
1053         sp_repr_remove_listener_by_data(cc->active_shape_repr, cc);
1054         Inkscape::GC::release(cc->active_shape_repr);
1055
1056         sp_repr_remove_listener_by_data(cc->active_shape_layer_repr, cc);
1057         Inkscape::GC::release(cc->active_shape_layer_repr);
1058     }
1059
1060     // Listen in case the active shape changes
1061     cc->active_shape_repr = SP_OBJECT_REPR(item);
1062     if (cc->active_shape_repr) {
1063         Inkscape::GC::anchor(cc->active_shape_repr);
1064         sp_repr_add_listener(cc->active_shape_repr, &shape_repr_events, cc);
1065
1066         cc->active_shape_layer_repr = cc->active_shape_repr->parent();
1067         Inkscape::GC::anchor(cc->active_shape_layer_repr);
1068         sp_repr_add_listener(cc->active_shape_layer_repr, &layer_repr_events, cc);
1069     }
1070
1071
1072     // Set center connection point.
1073     if ( cc->connpthandle == NULL ) {
1074         SPKnot * knot = (SPKnot*)g_object_new (SP_TYPE_KNOT, 0);
1075
1076         knot->desktop = cc->desktop;
1077         knot->flags = SP_KNOT_VISIBLE;
1078
1079         knot->item = sp_canvas_item_new (SP_DT_CONTROLS(cc->desktop),
1080                 SP_TYPE_CTRL,
1081                 "anchor", GTK_ANCHOR_CENTER,
1082                 "filled", TRUE,
1083                 "stroked", TRUE,
1084                 "mode", SP_KNOT_MODE_XOR,
1085                 NULL);
1086
1087         gtk_signal_connect (GTK_OBJECT (knot->item), "event",
1088                 GTK_SIGNAL_FUNC (cc_generic_knot_handler), knot);
1089
1090         knot->fill [SP_KNOT_STATE_NORMAL] = 0xffffff00;
1091         knot->fill [SP_KNOT_STATE_MOUSEOVER] = 0xff0000ff;
1092         knot->stroke [SP_KNOT_STATE_NORMAL] = 0x01000000;
1093
1094         g_object_set(G_OBJECT(knot),
1095                      "shape", SP_KNOT_SHAPE_SQUARE,
1096                      "size", 8,
1097                      "anchor", GTK_ANCHOR_CENTER,
1098                      "tip", _("<b>Connection point</b>: click or drag to create a new connector"),
1099                      NULL);
1100
1101         cc->connpthandle = knot;
1102     }
1103
1104
1105     NR::Rect bbox = sp_item_bbox_desktop(cc->active_shape);
1106     NR::Point center = bbox.midpoint();
1107     sp_knot_set_position(cc->connpthandle, &center, 0);
1108
1109     sp_knot_show(cc->connpthandle);
1110
1111 }
1112
1113
1114 static void
1115 cc_set_active_conn(SPConnectorContext *cc, SPItem *item)
1116 {
1117     g_assert( SP_IS_PATH(item) );
1118
1119     SPCurve *curve = SP_SHAPE(SP_PATH(item))->curve;
1120     NR::Matrix i2d = sp_item_i2d_affine(item);
1121
1122     if (cc->active_conn == item)
1123     {
1124         // Just adjust handle positions.
1125         NR::Point startpt = sp_curve_first_point(curve) * i2d;
1126         sp_knot_set_position(cc->endpt_handle[0], &startpt, 0);
1127
1128         NR::Point endpt = sp_curve_last_point(curve) * i2d;
1129         sp_knot_set_position(cc->endpt_handle[1], &endpt, 0);
1130
1131         return;
1132     }
1133
1134     cc->active_conn = item;
1135
1136     // Remove existing active conn listeners
1137     if (cc->active_conn_repr) {
1138         sp_repr_remove_listener_by_data(cc->active_conn_repr, cc);
1139         Inkscape::GC::release(cc->active_conn_repr);
1140         cc->active_conn_repr = NULL;
1141     }
1142
1143     // Listen in case the active conn changes
1144     cc->active_conn_repr = SP_OBJECT_REPR(item);
1145     if (cc->active_conn_repr) {
1146         Inkscape::GC::anchor(cc->active_conn_repr);
1147         sp_repr_add_listener(cc->active_conn_repr, &shape_repr_events, cc);
1148     }
1149
1150     for (int i = 0; i < 2; ++i) {
1151
1152         // Create the handle if it doesn't exist
1153         if ( cc->endpt_handle[i] == NULL ) {
1154             SPKnot * knot = (SPKnot*) g_object_new (SP_TYPE_KNOT, 0);
1155
1156             knot->desktop = cc->desktop;
1157             knot->flags = SP_KNOT_VISIBLE;
1158
1159             knot->item = sp_canvas_item_new (SP_DT_CONTROLS (cc->desktop),
1160                     SP_TYPE_CTRL,
1161                     "anchor", GTK_ANCHOR_CENTER,
1162                     "filled", TRUE,
1163                     "stroked", TRUE,
1164                     "mode", SP_KNOT_MODE_XOR,
1165                     NULL);
1166
1167             knot->fill [SP_KNOT_STATE_NORMAL] = 0xffffff00;
1168             knot->stroke [SP_KNOT_STATE_NORMAL] = 0x000000ff;
1169             knot->stroke [SP_KNOT_STATE_DRAGGING] = 0x000000ff;
1170             knot->stroke [SP_KNOT_STATE_MOUSEOVER] = 0x000000ff;
1171
1172             g_object_set(G_OBJECT(knot),
1173                     "shape", SP_KNOT_SHAPE_DIAMOND,
1174                     "size", 10,
1175                     "tip", _("<b>Connector endpoint</b>: drag to reroute or connect to new shapes"),
1176                     NULL);
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     return true;
1221 }
1222
1223
1224 bool cc_item_is_connector(SPItem *item)
1225 {
1226     if (SP_IS_PATH(item)) {
1227         if (SP_PATH(item)->connEndPair.isAutoRoutingConn()) {
1228             g_assert( !(SP_SHAPE(item)->curve->closed) );
1229             return true;
1230         }
1231     }
1232     return false;
1233 }
1234
1235
1236 void cc_selection_set_avoid(bool const set_avoid)
1237 {
1238     SPDesktop *desktop = inkscape_active_desktop();
1239     if (desktop == NULL) {
1240         return;
1241     }
1242
1243     SPDocument *document = SP_DT_DOCUMENT(desktop);
1244
1245     Inkscape::Selection *selection = SP_DT_SELECTION(desktop);
1246
1247     GSList *l = (GSList *) selection->itemList();
1248
1249     int changes = 0;
1250
1251     while (l) {
1252         SPItem *item = (SPItem *) l->data;
1253
1254         char const *value = (set_avoid) ? "true" : NULL;
1255
1256         if (cc_item_is_shape(item)) {
1257             sp_object_setAttribute(item, "inkscape:connector-avoid",
1258                     value, false);
1259             item->avoidRef->handleSettingChange();
1260             changes++;
1261         }
1262
1263         l = l->next;
1264     }
1265
1266     if (changes == 0) {
1267         desktop->messageStack()->flash(Inkscape::WARNING_MESSAGE,
1268                 _("Select <b>at least one non-connector object</b>."));
1269         return;
1270     }
1271
1272     sp_document_done(document);
1273 }
1274
1275
1276 static void
1277 cc_selection_changed(Inkscape::Selection *selection, gpointer data)
1278 {
1279     SPConnectorContext *cc = SP_CONNECTOR_CONTEXT(data);
1280     //SPEventContext *ec = SP_EVENT_CONTEXT(cc);
1281
1282     SPItem *item = selection->singleItem();
1283
1284     if (cc->active_conn == item)
1285     {
1286         // Nothing to change.
1287         return;
1288     }
1289     if (item == NULL)
1290     {
1291         cc_clear_active_conn(cc);
1292         return;
1293     }
1294
1295     if (cc_item_is_connector(item)) {
1296         cc_set_active_conn(cc, item);
1297     }
1298 }
1299
1300
1301 static void
1302 shape_event_attr_deleted(Inkscape::XML::Node *repr, Inkscape::XML::Node *child,
1303         Inkscape::XML::Node *ref, gpointer data)
1304 {
1305     g_assert(data);
1306     SPConnectorContext *cc = SP_CONNECTOR_CONTEXT(data);
1307
1308     if (child == cc->active_shape_repr) {
1309         // The active shape has been deleted.  Clear active shape.
1310         cc_clear_active_shape(cc);
1311     }
1312 }
1313
1314
1315 static void
1316 shape_event_attr_changed(Inkscape::XML::Node *repr, gchar const *name,
1317                             gchar const *old_value, gchar const *new_value,
1318                             bool is_interactive, gpointer data)
1319 {
1320     g_assert(data);
1321     SPConnectorContext *cc = SP_CONNECTOR_CONTEXT(data);
1322
1323     // Look for changes than result in onscreen movement.
1324     if (!strcmp(name, "d") || !strcmp(name, "x") || !strcmp(name, "y") ||
1325             !strcmp(name, "width") || !strcmp(name, "height") ||
1326             !strcmp(name, "transform"))
1327     {
1328         if (repr == cc->active_shape_repr) {
1329             // Active shape has moved. Clear active shape.
1330             cc_clear_active_shape(cc);
1331         }
1332         else if (repr == cc->active_conn_repr) {
1333             // The active conn has been moved.
1334             // Set it again, which just sets new handle positions.
1335             cc_set_active_conn(cc, cc->active_conn);
1336         }
1337     }
1338 }
1339
1340
1341 /*
1342   Local Variables:
1343   mode:c++
1344   c-file-style:"stroustrup"
1345   c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
1346   indent-tabs-mode:nil
1347   fill-column:99
1348   End:
1349 */
1350 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :