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     // Make sure we see all enter events for canvas items,
 284     // even if a mouse button is depressed.
 285     dt->canvas->gen_all_enter_events = true;
 286 }
 287
 288
 289 static void
 290 sp_connector_context_finish(SPEventContext *ec)
 291 {
 292     SPConnectorContext *cc = SP_CONNECTOR_CONTEXT(ec);
 293
 294     spcc_connector_finish(cc);
 295
 296     if (((SPEventContextClass *) parent_class)->finish) {
 297         ((SPEventContextClass *) parent_class)->finish(ec);
 298     }
 299
 300     if (cc->selection) {
 301         cc->selection = NULL;
 302     }
 303     cc_clear_active_shape(cc);
 304     cc_clear_active_conn(cc);
 305
 306     // Restore the default event generating behaviour.
 307     SPDesktop *desktop = SP_EVENT_CONTEXT_DESKTOP(ec);
 308     desktop->canvas->gen_all_enter_events = false;
 309 }
 310
 311
 312 //-----------------------------------------------------------------------------
 313
 314
 315 static void
 316 cc_clear_active_shape(SPConnectorContext *cc)
 317 {
 318     if (cc->active_shape == NULL) {
 319         return;
 320     }
 321     g_assert( cc->active_shape_repr );
 322     g_assert( cc->active_shape_layer_repr );
 323
 324     cc->active_shape = NULL;
 325
 326     if (cc->active_shape_repr) {
 327         sp_repr_remove_listener_by_data(cc->active_shape_repr, cc);
 328         Inkscape::GC::release(cc->active_shape_repr);
 329         cc->active_shape_repr = NULL;
 330
 331         sp_repr_remove_listener_by_data(cc->active_shape_layer_repr, cc);
 332         Inkscape::GC::release(cc->active_shape_layer_repr);
 333         cc->active_shape_layer_repr = NULL;
 334     }
 335
 336     // Hide the center connection point if it exists.
 337     if (cc->connpthandle) {
 338         sp_knot_hide(cc->connpthandle);
 339     }
 340 }
 341
 342
 343 static void
 344 cc_clear_active_conn(SPConnectorContext *cc)
 345 {
 346     if (cc->active_conn == NULL) {
 347         return;
 348     }
 349     g_assert( cc->active_conn_repr );
 350
 351     cc->active_conn = NULL;
 352
 353     if (cc->active_conn_repr) {
 354         sp_repr_remove_listener_by_data(cc->active_conn_repr, cc);
 355         Inkscape::GC::release(cc->active_conn_repr);
 356         cc->active_conn_repr = NULL;
 357     }
 358
 359     // Hide the endpoint handles.
 360     for (int i = 0; i < 2; ++i) {
 361         if (cc->endpt_handle[i]) {
 362             sp_knot_hide(cc->endpt_handle[i]);
 363         }
 364     }
 365 }
 366
 367
 368 static gchar *
 369 conn_pt_handle_test(SPConnectorContext *cc, NR::Point& p)
 370 {
 371     // TODO: this will need to change when there are more connection
 372     //       points available for each shape.
 373
 374     SPKnot *centerpt = cc->connpthandle;
 375     if (cc->active_handle && (cc->active_handle == centerpt))
 376     {
 377         p = centerpt->pos;
 378         return g_strdup_printf("#%s", SP_OBJECT_ID(cc->active_shape));
 379     }
 380     return NULL;
 381 }
 382
 383
 384
 385 static gint
 386 sp_connector_context_item_handler(SPEventContext *ec, SPItem *item, GdkEvent *event)
 387 {
 388     gint ret = FALSE;
 389
 390     SPDesktop *desktop = ec->desktop;
 391
 392     SPConnectorContext *cc = SP_CONNECTOR_CONTEXT(ec);
 393
 394     NR::Point p(event->button.x, event->button.y);
 395
 396     switch (event->type) {
 397         case GDK_BUTTON_RELEASE:
 398             if (event->button.button == 1) {
 399                 if ((cc->state == SP_CONNECTOR_CONTEXT_DRAGGING) &&
 400                         (connector_within_tolerance))
 401                 {
 402                     spcc_reset_colors(cc);
 403                     cc->state = SP_CONNECTOR_CONTEXT_IDLE;
 404                 }
 405                 if (cc->state != SP_CONNECTOR_CONTEXT_IDLE) {
 406                     // Doing simething else like rerouting.
 407                     break;
 408                 }
 409                 // find out clicked item, disregarding groups, honoring Alt
 410                 SPItem *item_ungrouped = sp_event_context_find_item(desktop,
 411                         p, event->button.state & GDK_MOD1_MASK, TRUE);
 412
 413                 if (event->button.state & GDK_SHIFT_MASK) {
 414                     cc->selection->toggle(item_ungrouped);
 415                 } else {
 416                     cc->selection->set(item_ungrouped);
 417                 }
 418                 ret = TRUE;
 419             }
 420             break;
 421         case GDK_ENTER_NOTIFY:
 422         {
 423             if (cc_item_is_shape(item)) {
 424                 // This is a shape, so show connection point(s).
 425                 if (!(cc->active_shape) ||
 426                         // Don't show handle for another handle.
 427                         (item != ((SPItem *) cc->connpthandle))) {
 428                     cc_set_active_shape(cc, item);
 429                 }
 430             }
 431             ret = TRUE;
 432             break;
 433         }
 434         default:
 435             break;
 436     }
 437
 438     return ret;
 439 }
 440
 441
 442 gint
 443 sp_connector_context_root_handler(SPEventContext *ec, GdkEvent *event)
 444 {
 445     SPConnectorContext *const cc = SP_CONNECTOR_CONTEXT(ec);
 446
 447     gint ret = FALSE;
 448
 449     switch (event->type) {
 450         case GDK_BUTTON_PRESS:
 451             ret = connector_handle_button_press(cc, event->button);
 452             break;
 453
 454         case GDK_MOTION_NOTIFY:
 455             ret = connector_handle_motion_notify(cc, event->motion);
 456             break;
 457
 458         case GDK_BUTTON_RELEASE:
 459             ret = connector_handle_button_release(cc, event->button);
 460             break;
 461         case GDK_KEY_PRESS:
 462             ret = connector_handle_key_press(cc, get_group0_keyval (&event->key));
 463             break;
 464
 465         default:
 466             break;
 467     }
 468
 469     if (!ret) {
 470         gint (*const parent_root_handler)(SPEventContext *, GdkEvent *)
 471             = ((SPEventContextClass *) parent_class)->root_handler;
 472         if (parent_root_handler) {
 473             ret = parent_root_handler(ec, event);
 474         }
 475     }
 476
 477     return ret;
 478 }
 479
 480
 481 static gint
 482 connector_handle_button_press(SPConnectorContext *const cc, GdkEventButton const &bevent)
 483 {
 484     NR::Point const event_w(bevent.x, bevent.y);
 485     /* Find desktop coordinates */
 486     NR::Point p = cc->desktop->w2d(event_w);
 487
 488     gint ret = FALSE;
 489     if ( bevent.button == 1 ) {
 490
 491         SPDesktop *desktop = SP_EVENT_CONTEXT_DESKTOP(cc);
 492
 493         if (Inkscape::have_viable_layer(desktop, cc->_message_context) == false) {
 494             return TRUE;
 495         }
 496
 497         NR::Point const event_w(bevent.x,
 498                                 bevent.y);
 499         connector_drag_origin_w = event_w;
 500         connector_within_tolerance = true;
 501
 502         NR::Point const event_dt = cc->desktop->w2d(event_w);
 503         switch (cc->state) {
 504             case SP_CONNECTOR_CONTEXT_STOP:
 505                 /* This is allowed, if we just cancelled curve */
 506             case SP_CONNECTOR_CONTEXT_IDLE:
 507             {
 508                 if ( cc->npoints == 0 ) {
 509                     /* Set start anchor */
 510                     NR::Point p;
 511
 512                     cc_clear_active_conn(cc);
 513
 514                     SP_EVENT_CONTEXT_DESKTOP(cc)->messageStack()->flash(Inkscape::NORMAL_MESSAGE, _("Creating new connector"));
 515
 516                     /* Create green anchor */
 517                     p = event_dt;
 518
 519                     // Test whether we clicked on a connection point
 520                     cc->sid = conn_pt_handle_test(cc, p);
 521
 522                     if (!cc->sid) {
 523                         // This is the first point, so just snap it to the grid
 524                         // as there's no other points to go off.
 525                         SnapManager const m(cc->desktop->namedview);
 526                         p = m.freeSnap(Inkscape::Snapper::SNAP_POINT | Inkscape::Snapper::BBOX_POINT,
 527                                        p, NULL).getPoint();
 528                     }
 529                     spcc_connector_set_initial_point(cc, p);
 530
 531                 }
 532                 cc->state = SP_CONNECTOR_CONTEXT_DRAGGING;
 533                 ret = TRUE;
 534                 break;
 535             }
 536             case SP_CONNECTOR_CONTEXT_DRAGGING:
 537             {
 538                 // This is the second click of a connector creation.
 539
 540                 spcc_connector_set_subsequent_point(cc, p);
 541                 spcc_connector_finish_segment(cc, p);
 542                 // Test whether we clicked on a connection point
 543                 cc->eid = conn_pt_handle_test(cc, p);
 544                 if (cc->npoints != 0) {
 545                     spcc_connector_finish(cc);
 546                 }
 547                 cc_set_active_conn(cc, cc->newconn);
 548                 cc->state = SP_CONNECTOR_CONTEXT_IDLE;
 549                 ret = TRUE;
 550                 break;
 551             }
 552             case SP_CONNECTOR_CONTEXT_CLOSE:
 553             {
 554                 g_warning("Button down in CLOSE state");
 555                 break;
 556             }
 557             default:
 558                 break;
 559         }
 560     } else if (bevent.button == 3) {
 561         if (cc->npoints != 0) {
 562             spcc_connector_finish(cc);
 563             ret = TRUE;
 564         }
 565     }
 566     return ret;
 567 }
 568
 569
 570 static gint
 571 connector_handle_motion_notify(SPConnectorContext *const cc, GdkEventMotion const &mevent)
 572 {
 573     gint ret = FALSE;
 574
 575     if (mevent.state & GDK_BUTTON2_MASK || mevent.state & GDK_BUTTON3_MASK) {
 576         // allow middle-button scrolling
 577         return FALSE;
 578     }
 579
 580     NR::Point const event_w(mevent.x, mevent.y);
 581
 582     if (connector_within_tolerance) {
 583         gint const tolerance = prefs_get_int_attribute_limited("options.dragtolerance",
 584                                                                "value", 0, 0, 100);
 585         if ( NR::LInfty( event_w - connector_drag_origin_w ) < tolerance ) {
 586             return FALSE;   // Do not drag if we're within tolerance from origin.
 587         }
 588     }
 589     // Once the user has moved farther than tolerance from the original location
 590     // (indicating they intend to move the object, not click), then always process
 591     // the motion notify coordinates as given (no snapping back to origin)
 592     connector_within_tolerance = false;
 593
 594     SPDesktop *const dt = cc->desktop;
 595
 596     /* Find desktop coordinates */
 597     NR::Point p = dt->w2d(event_w);
 598
 599     switch (cc->state) {
 600         case SP_CONNECTOR_CONTEXT_DRAGGING:
 601         {
 602             // This is movement during a connector creation.
 603
 604             if ( cc->npoints > 0 ) {
 605                 cc->selection->clear();
 606                 spcc_connector_set_subsequent_point(cc, p);
 607                 ret = TRUE;
 608             }
 609             break;
 610         }
 611         case SP_CONNECTOR_CONTEXT_REROUTING:
 612         {
 613             g_assert( SP_IS_PATH(cc->clickeditem));
 614
 615             // Update the hidden path
 616             NR::Matrix i2d = sp_item_i2d_affine(cc->clickeditem);
 617             NR::Matrix d2i = i2d.inverse();
 618             SPPath *path = SP_PATH(cc->clickeditem);
 619             SPCurve *curve = (SP_SHAPE(path))->curve;
 620             if (cc->clickedhandle == cc->endpt_handle[0]) {
 621                 NR::Point o = cc->endpt_handle[1]->pos;
 622                 sp_curve_stretch_endpoints(curve, p * d2i, o * d2i);
 623             }
 624             else {
 625                 NR::Point o = cc->endpt_handle[0]->pos;
 626                 sp_curve_stretch_endpoints(curve, o * d2i, p * d2i);
 627             }
 628             sp_conn_adjust_path(path);
 629
 630             // Copy this to the temporary visible path
 631             cc->red_curve = sp_curve_copy(SP_SHAPE(path)->curve);
 632             sp_curve_transform(cc->red_curve, i2d);
 633
 634             sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(cc->red_bpath), cc->red_curve);
 635             ret = TRUE;
 636             break;
 637         }
 638         case SP_CONNECTOR_CONTEXT_STOP:
 639             /* This is perfectly valid */
 640             break;
 641         default:
 642             break;
 643     }
 644
 645     return ret;
 646 }
 647
 648
 649 static gint
 650 connector_handle_button_release(SPConnectorContext *const cc, GdkEventButton const &revent)
 651 {
 652     gint ret = FALSE;
 653     if ( revent.button == 1 ) {
 654
 655         SPDesktop *desktop = SP_EVENT_CONTEXT_DESKTOP(cc);
 656         SPDocument *doc = SP_DT_DOCUMENT(desktop);
 657
 658         NR::Point const event_w(revent.x, revent.y);
 659
 660         /* Find desktop coordinates */
 661         NR::Point p = cc->desktop->w2d(event_w);
 662
 663         switch (cc->state) {
 664             //case SP_CONNECTOR_CONTEXT_POINT:
 665             case SP_CONNECTOR_CONTEXT_DRAGGING:
 666             {
 667                 if (connector_within_tolerance)
 668                 {
 669                     spcc_connector_finish_segment(cc, p);
 670                     return TRUE;
 671                 }
 672                 // Connector has been created via a drag, end it now.
 673                 spcc_connector_set_subsequent_point(cc, p);
 674                 spcc_connector_finish_segment(cc, p);
 675                 // Test whether we clicked on a connection point
 676                 cc->eid = conn_pt_handle_test(cc, p);
 677                 if (cc->npoints != 0) {
 678                     spcc_connector_finish(cc);
 679                 }
 680                 cc_set_active_conn(cc, cc->newconn);
 681                 cc->state = SP_CONNECTOR_CONTEXT_IDLE;
 682                 break;
 683             }
 684             case SP_CONNECTOR_CONTEXT_REROUTING:
 685             {
 686                 // Clear the temporary path:
 687                 sp_curve_reset(cc->red_curve);
 688                 sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(cc->red_bpath), NULL);
 689
 690                 // Test whether we clicked on a connection point
 691                 gchar *shape_label = conn_pt_handle_test(cc, p);
 692
 693                 if (shape_label) {
 694                     if (cc->clickedhandle == cc->endpt_handle[0]) {
 695                         sp_object_setAttribute(cc->clickeditem,
 696                                 "inkscape:connection-start",shape_label, false);
 697                     }
 698                     else {
 699                         sp_object_setAttribute(cc->clickeditem,
 700                                 "inkscape:connection-end",shape_label, false);
 701                     }
 702                     g_free(shape_label);
 703                 }
 704                 cc->clickeditem->setHidden(false);
 705                 sp_conn_adjust_path(SP_PATH(cc->clickeditem));
 706                 cc->clickeditem->updateRepr();
 707                 sp_document_done(doc);
 708                 cc_set_active_conn(cc, cc->clickeditem);
 709                 sp_document_ensure_up_to_date(doc);
 710                 cc->state = SP_CONNECTOR_CONTEXT_IDLE;
 711                 return TRUE;
 712                 break;
 713             }
 714             case SP_CONNECTOR_CONTEXT_STOP:
 715                 /* This is allowed, if we just cancelled curve */
 716                 break;
 717             default:
 718                 break;
 719         }
 720         ret = TRUE;
 721     }
 722
 723     return ret;
 724 }
 725
 726
 727 static gint
 728 connector_handle_key_press(SPConnectorContext *const cc, guint const keyval)
 729 {
 730     gint ret = FALSE;
 731     /* fixme: */
 732     switch (keyval) {
 733         case GDK_Return:
 734         case GDK_KP_Enter:
 735             if (cc->npoints != 0) {
 736                 spcc_connector_finish(cc);
 737                 ret = TRUE;
 738             }
 739             break;
 740         case GDK_Escape:
 741             if (cc->npoints != 0) {
 742                 // if drawing, cancel, otherwise pass it up for deselecting
 743                 cc->state = SP_CONNECTOR_CONTEXT_STOP;
 744                 spcc_reset_colors(cc);
 745                 ret = TRUE;
 746             }
 747             break;
 748         default:
 749             break;
 750     }
 751     return ret;
 752 }
 753
 754
 755 static void
 756 spcc_reset_colors(SPConnectorContext *cc)
 757 {
 758     /* Red */
 759     sp_curve_reset(cc->red_curve);
 760     sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(cc->red_bpath), NULL);
 761
 762     sp_curve_reset(cc->green_curve);
 763     cc->npoints = 0;
 764 }
 765
 766
 767 static void
 768 spcc_connector_set_initial_point(SPConnectorContext *const cc, NR::Point const p)
 769 {
 770     g_assert( cc->npoints == 0 );
 771
 772     cc->p[0] = p;
 773     cc->p[1] = p;
 774     cc->npoints = 2;
 775     sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(cc->red_bpath), NULL);
 776 }
 777
 778
 779 static void
 780 spcc_connector_set_subsequent_point(SPConnectorContext *const cc, NR::Point const p)
 781 {
 782     g_assert( cc->npoints != 0 );
 783
 784     SPDesktop *dt = cc->desktop;
 785     NR::Point o = dt->dt2doc(cc->p[0]);
 786     NR::Point d = dt->dt2doc(p);
 787     Avoid::Point src = { o[NR::X], o[NR::Y] };
 788     Avoid::Point dst = { d[NR::X], d[NR::Y] };
 789
 790     if (!cc->newConnRef) {
 791         Avoid::Router *router = SP_DT_DOCUMENT(dt)->router;
 792         cc->newConnRef = new Avoid::ConnRef(router, 0, src, dst);
 793         cc->newConnRef->updateEndPoint(Avoid::VertID::src, src);
 794     }
 795     cc->newConnRef->updateEndPoint(Avoid::VertID::tar, dst);
 796
 797     cc->newConnRef->makePathInvalid();
 798     cc->newConnRef->generatePath(src, dst);
 799
 800     Avoid::PolyLine route = cc->newConnRef->route();
 801     cc->newConnRef->calcRouteDist();
 802
 803     sp_curve_reset(cc->red_curve);
 804     NR::Point pt(route.ps[0].x, route.ps[0].y);
 805     sp_curve_moveto(cc->red_curve, pt);
 806
 807     for (int i = 1; i < route.pn; ++i) {
 808         NR::Point p(route.ps[i].x, route.ps[i].y);
 809         sp_curve_lineto(cc->red_curve, p);
 810     }
 811     sp_curve_transform(cc->red_curve, dt->doc2dt());
 812     sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(cc->red_bpath), cc->red_curve);
 813 }
 814
 815
 816 /**
 817  * Concats red, blue and green.
 818  * If any anchors are defined, process these, optionally removing curves from white list
 819  * Invoke _flush_white to write result back to object.
 820  */
 821 static void
 822 spcc_concat_colors_and_flush(SPConnectorContext *cc)
 823 {
 824     SPCurve *c = cc->green_curve;
 825     cc->green_curve = sp_curve_new_sized(64);
 826
 827     sp_curve_reset(cc->red_curve);
 828     sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(cc->red_bpath), NULL);
 829
 830     if (sp_curve_empty(c)) {
 831         sp_curve_unref(c);
 832         return;
 833     }
 834
 835     spcc_flush_white(cc, c);
 836
 837     sp_curve_unref(c);
 838 }
 839
 840
 841 /*
 842  * Flushes white curve(s) and additional curve into object
 843  *
 844  * No cleaning of colored curves - this has to be done by caller
 845  * No rereading of white data, so if you cannot rely on ::modified, do it in caller
 846  *
 847  */
 848
 849 static void
 850 spcc_flush_white(SPConnectorContext *cc, SPCurve *gc)
 851 {
 852     SPCurve *c;
 853
 854     if (gc) {
 855         c = gc;
 856         sp_curve_ref(c);
 857     } else {
 858         return;
 859     }
 860
 861     /* Now we have to go back to item coordinates at last */
 862     sp_curve_transform(c,
 863             sp_desktop_dt2root_affine(SP_EVENT_CONTEXT_DESKTOP(cc)));
 864
 865     SPDesktop *desktop = SP_EVENT_CONTEXT_DESKTOP(cc);
 866     SPDocument *doc = SP_DT_DOCUMENT(desktop);
 867
 868     if ( c && !sp_curve_empty(c) ) {
 869         /* We actually have something to write */
 870
 871         Inkscape::XML::Node *repr = sp_repr_new("svg:path");
 872         /* Set style */
 873         sp_desktop_apply_style_tool(desktop, repr, "tools.connector", false);
 874
 875         gchar *str = sp_svg_write_path(SP_CURVE_BPATH(c));
 876         g_assert( str != NULL );
 877         repr->setAttribute("d", str);
 878         g_free(str);
 879
 880         /* Attach repr */
 881         cc->newconn = SP_ITEM(desktop->currentLayer()->appendChildRepr(repr));
 882         cc->selection->set(repr);
 883         Inkscape::GC::release(repr);
 884         cc->newconn->transform = i2i_affine(desktop->currentRoot(), desktop->currentLayer());
 885         cc->newconn->updateRepr();
 886
 887         bool connection = false;
 888         sp_object_setAttribute(cc->newconn, "inkscape:connector-type",
 889                 "polyline", false);
 890         if (cc->sid)
 891         {
 892             sp_object_setAttribute(cc->newconn, "inkscape:connection-start",
 893                     cc->sid, false);
 894             connection = true;
 895         }
 896
 897         if (cc->eid)
 898         {
 899             sp_object_setAttribute(cc->newconn, "inkscape:connection-end",
 900                     cc->eid, false);
 901             connection = true;
 902         }
 903         cc->newconn->updateRepr();
 904         if (connection) {
 905             // Adjust endpoints to shape edge.
 906             sp_conn_adjust_path(SP_PATH(cc->newconn));
 907         }
 908         cc->newconn->updateRepr();
 909     }
 910
 911     sp_curve_unref(c);
 912
 913     /* Flush pending updates */
 914     sp_document_done(doc);
 915     sp_document_ensure_up_to_date(doc);
 916 }
 917
 918
 919 static void
 920 spcc_connector_finish_segment(SPConnectorContext *const cc, NR::Point const p)
 921 {
 922     if (!sp_curve_empty(cc->red_curve)) {
 923         sp_curve_append_continuous(cc->green_curve, cc->red_curve, 0.0625);
 924
 925         cc->p[0] = cc->p[3];
 926         cc->p[1] = cc->p[4];
 927         cc->npoints = 2;
 928
 929         sp_curve_reset(cc->red_curve);
 930     }
 931 }
 932
 933
 934 static void
 935 spcc_connector_finish(SPConnectorContext *const cc)
 936 {
 937     SPDesktop *const desktop = cc->desktop;
 938     desktop->messageStack()->flash(Inkscape::NORMAL_MESSAGE, _("Finishing connector"));
 939
 940     sp_curve_reset(cc->red_curve);
 941     spcc_concat_colors_and_flush(cc);
 942
 943     cc->npoints = 0;
 944
 945     if (cc->newConnRef) {
 946         cc->newConnRef->removeFromGraph();
 947         delete cc->newConnRef;
 948         cc->newConnRef = NULL;
 949     }
 950     cc->state = SP_CONNECTOR_CONTEXT_IDLE;
 951 }
 952
 953
 954 static gboolean
 955 cc_generic_knot_handler(SPCanvasItem *, GdkEvent *event, SPKnot *knot)
 956 {
 957     g_assert (knot != NULL);
 958
 959     SPConnectorContext *cc = SP_CONNECTOR_CONTEXT(
 960             knot->desktop->event_context);
 961
 962     gboolean consumed = FALSE;
 963
 964     switch (event->type) {
 965         case GDK_ENTER_NOTIFY:
 966             gtk_object_set (GTK_OBJECT (knot->item), "fill_color",
 967                     knot->fill [SP_KNOT_STATE_MOUSEOVER], NULL);
 968             gtk_object_set (GTK_OBJECT (knot->item), "stroke_color",
 969                     knot->stroke [SP_KNOT_STATE_MOUSEOVER], NULL);
 970
 971             cc->active_handle = knot;
 972
 973             if (knot->tip)
 974             {
 975                 knot->desktop->event_context->defaultMessageContext()->set(
 976                         Inkscape::NORMAL_MESSAGE, knot->tip);
 977             }
 978
 979             consumed = TRUE;
 980             break;
 981         case GDK_LEAVE_NOTIFY:
 982             gtk_object_set (GTK_OBJECT (knot->item), "fill_color",
 983                     knot->fill [SP_KNOT_STATE_NORMAL], NULL);
 984             gtk_object_set (GTK_OBJECT (knot->item), "stroke_color",
 985                     knot->stroke [SP_KNOT_STATE_NORMAL], NULL);
 986
 987             cc->active_handle = NULL;
 988
 989             if (knot->tip) {
 990                 knot->desktop->event_context->defaultMessageContext()->clear();
 991             }
 992
 993             consumed = TRUE;
 994             break;
 995         default:
 996             break;
 997     }
 998
 999     return consumed;
1000 }
1001
1002
1003 static gboolean
1004 endpt_handler(SPKnot *knot, GdkEvent *event, SPConnectorContext *cc)
1005 {
1006     g_assert( SP_IS_CONNECTOR_CONTEXT(cc) );
1007
1008     gboolean consumed = FALSE;
1009
1010     switch (event->type) {
1011         case GDK_BUTTON_PRESS:
1012             g_assert( (cc->active_handle == cc->endpt_handle[0]) ||
1013                       (cc->active_handle == cc->endpt_handle[1]) );
1014             if (cc->state == SP_CONNECTOR_CONTEXT_IDLE) {
1015                 cc->clickeditem = cc->active_conn;
1016                 cc->clickedhandle = cc->active_handle;
1017                 cc_clear_active_conn(cc);
1018                 cc->state = SP_CONNECTOR_CONTEXT_REROUTING;
1019
1020                 // Disconnect from attached shape
1021                 unsigned ind = (cc->active_handle == cc->endpt_handle[0]) ? 0 : 1;
1022                 sp_conn_end_detach(cc->clickeditem, ind);
1023
1024                 NR::Point origin;
1025                 if (cc->clickedhandle == cc->endpt_handle[0]) {
1026                     origin = cc->endpt_handle[1]->pos;
1027                 }
1028                 else {
1029                     origin = cc->endpt_handle[0]->pos;
1030                 }
1031
1032                 // Show the red path for dragging.
1033                 cc->red_curve = sp_curve_copy(SP_PATH(cc->clickeditem)->curve);
1034                 NR::Matrix i2d = sp_item_i2d_affine(cc->clickeditem);
1035                 sp_curve_transform(cc->red_curve, i2d);
1036                 sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(cc->red_bpath),
1037                         cc->red_curve);
1038
1039                 cc->clickeditem->setHidden(true);
1040
1041                 // The rest of the interaction rerouting the connector is
1042                 // handled by the context root handler.
1043                 consumed = TRUE;
1044             }
1045             break;
1046         default:
1047             break;
1048     }
1049
1050     return consumed;
1051 }
1052
1053
1054 static void cc_set_active_shape(SPConnectorContext *cc, SPItem *item)
1055 {
1056     g_assert(item != NULL );
1057
1058     cc->active_shape = item;
1059
1060     // Remove existing active shape listeners
1061     if (cc->active_shape_repr) {
1062         sp_repr_remove_listener_by_data(cc->active_shape_repr, cc);
1063         Inkscape::GC::release(cc->active_shape_repr);
1064
1065         sp_repr_remove_listener_by_data(cc->active_shape_layer_repr, cc);
1066         Inkscape::GC::release(cc->active_shape_layer_repr);
1067     }
1068
1069     // Listen in case the active shape changes
1070     cc->active_shape_repr = SP_OBJECT_REPR(item);
1071     if (cc->active_shape_repr) {
1072         Inkscape::GC::anchor(cc->active_shape_repr);
1073         sp_repr_add_listener(cc->active_shape_repr, &shape_repr_events, cc);
1074
1075         cc->active_shape_layer_repr = cc->active_shape_repr->parent();
1076         Inkscape::GC::anchor(cc->active_shape_layer_repr);
1077         sp_repr_add_listener(cc->active_shape_layer_repr, &layer_repr_events, cc);
1078     }
1079
1080
1081     // Set center connection point.
1082     if ( cc->connpthandle == NULL ) {
1083         SPKnot * knot = (SPKnot*)g_object_new (SP_TYPE_KNOT, 0);
1084
1085         knot->desktop = cc->desktop;
1086         knot->flags = SP_KNOT_VISIBLE;
1087
1088         knot->item = sp_canvas_item_new (SP_DT_CONTROLS(cc->desktop),
1089                 SP_TYPE_CTRL,
1090                 "anchor", GTK_ANCHOR_CENTER,
1091                 "filled", TRUE,
1092                 "stroked", TRUE,
1093                 "mode", SP_KNOT_MODE_XOR,
1094                 NULL);
1095
1096         gtk_signal_connect (GTK_OBJECT (knot->item), "event",
1097                 GTK_SIGNAL_FUNC (cc_generic_knot_handler), knot);
1098
1099         knot->fill [SP_KNOT_STATE_NORMAL] = 0xffffff00;
1100         knot->fill [SP_KNOT_STATE_MOUSEOVER] = 0xff0000ff;
1101         knot->stroke [SP_KNOT_STATE_NORMAL] = 0x01000000;
1102
1103         g_object_set(G_OBJECT(knot),
1104                      "shape", SP_KNOT_SHAPE_SQUARE,
1105                      "size", 8,
1106                      "anchor", GTK_ANCHOR_CENTER,
1107                      "tip", _("<b>Connection point</b>: click or drag to create a new connector"),
1108                      NULL);
1109
1110         cc->connpthandle = knot;
1111     }
1112
1113
1114     NR::Rect bbox = sp_item_bbox_desktop(cc->active_shape);
1115     NR::Point center = bbox.midpoint();
1116     sp_knot_set_position(cc->connpthandle, &center, 0);
1117
1118     sp_knot_show(cc->connpthandle);
1119
1120 }
1121
1122
1123 static void
1124 cc_set_active_conn(SPConnectorContext *cc, SPItem *item)
1125 {
1126     g_assert( SP_IS_PATH(item) );
1127
1128     SPCurve *curve = SP_SHAPE(SP_PATH(item))->curve;
1129     NR::Matrix i2d = sp_item_i2d_affine(item);
1130
1131     if (cc->active_conn == item)
1132     {
1133         // Just adjust handle positions.
1134         NR::Point startpt = sp_curve_first_point(curve) * i2d;
1135         sp_knot_set_position(cc->endpt_handle[0], &startpt, 0);
1136
1137         NR::Point endpt = sp_curve_last_point(curve) * i2d;
1138         sp_knot_set_position(cc->endpt_handle[1], &endpt, 0);
1139
1140         return;
1141     }
1142
1143     cc->active_conn = item;
1144
1145     // Remove existing active conn listeners
1146     if (cc->active_conn_repr) {
1147         sp_repr_remove_listener_by_data(cc->active_conn_repr, cc);
1148         Inkscape::GC::release(cc->active_conn_repr);
1149         cc->active_conn_repr = NULL;
1150     }
1151
1152     // Listen in case the active conn changes
1153     cc->active_conn_repr = SP_OBJECT_REPR(item);
1154     if (cc->active_conn_repr) {
1155         Inkscape::GC::anchor(cc->active_conn_repr);
1156         sp_repr_add_listener(cc->active_conn_repr, &shape_repr_events, cc);
1157     }
1158
1159     for (int i = 0; i < 2; ++i) {
1160
1161         // Create the handle if it doesn't exist
1162         if ( cc->endpt_handle[i] == NULL ) {
1163             SPKnot * knot = (SPKnot*) g_object_new (SP_TYPE_KNOT, 0);
1164
1165             knot->desktop = cc->desktop;
1166             knot->flags = SP_KNOT_VISIBLE;
1167
1168             knot->item = sp_canvas_item_new (SP_DT_CONTROLS (cc->desktop),
1169                     SP_TYPE_CTRL,
1170                     "anchor", GTK_ANCHOR_CENTER,
1171                     "filled", TRUE,
1172                     "stroked", TRUE,
1173                     "mode", SP_KNOT_MODE_XOR,
1174                     NULL);
1175
1176             knot->fill [SP_KNOT_STATE_NORMAL] = 0xffffff00;
1177             knot->stroke [SP_KNOT_STATE_NORMAL] = 0x000000ff;
1178             knot->stroke [SP_KNOT_STATE_DRAGGING] = 0x000000ff;
1179             knot->stroke [SP_KNOT_STATE_MOUSEOVER] = 0x000000ff;
1180
1181             g_object_set(G_OBJECT(knot),
1182                     "shape", SP_KNOT_SHAPE_DIAMOND,
1183                     "size", 10,
1184                     "tip", _("<b>Connector endpoint</b>: drag to reroute or connect to new shapes"),
1185                     NULL);
1186
1187             gtk_signal_connect (GTK_OBJECT (knot->item), "event",
1188                     GTK_SIGNAL_FUNC (cc_generic_knot_handler), knot);
1189
1190             cc->endpt_handle[i] = knot;
1191         }
1192
1193         // Remove any existing handlers
1194         if (cc->endpt_handler_id[i]) {
1195             g_signal_handlers_disconnect_by_func(
1196                     G_OBJECT(cc->endpt_handle[i]->item),
1197                     (void*)G_CALLBACK(endpt_handler), (gpointer) cc );
1198             cc->endpt_handler_id[i] = 0;
1199         }
1200
1201         // Setup handlers for connector endpoints, this is
1202         // is as 'after' so that cc_generic_knot_handler is
1203         // triggered first for any endpoint.
1204         cc->endpt_handler_id[i] = g_signal_connect_after(
1205                 G_OBJECT(cc->endpt_handle[i]->item), "event",
1206                 G_CALLBACK(endpt_handler), cc);
1207     }
1208
1209     NR::Point startpt = sp_curve_first_point(curve) * i2d;
1210     sp_knot_set_position(cc->endpt_handle[0], &startpt, 0);
1211
1212     NR::Point endpt = sp_curve_last_point(curve) * i2d;
1213     sp_knot_set_position(cc->endpt_handle[1], &endpt, 0);
1214
1215     sp_knot_show(cc->endpt_handle[0]);
1216     sp_knot_show(cc->endpt_handle[1]);
1217 }
1218
1219
1220 static bool cc_item_is_shape(SPItem *item)
1221 {
1222     if (SP_IS_PATH(item)) {
1223         SPCurve *curve = (SP_SHAPE(item))->curve;
1224         if ( curve && !(curve->closed) ) {
1225             // Open paths are connectors.
1226             return false;
1227         }
1228     }
1229     return true;
1230 }
1231
1232
1233 bool cc_item_is_connector(SPItem *item)
1234 {
1235     if (SP_IS_PATH(item)) {
1236         if (SP_PATH(item)->connEndPair.isAutoRoutingConn()) {
1237             g_assert( !(SP_SHAPE(item)->curve->closed) );
1238             return true;
1239         }
1240     }
1241     return false;
1242 }
1243
1244
1245 void cc_selection_set_avoid(bool const set_avoid)
1246 {
1247     SPDesktop *desktop = inkscape_active_desktop();
1248     if (desktop == NULL) {
1249         return;
1250     }
1251
1252     SPDocument *document = SP_DT_DOCUMENT(desktop);
1253
1254     Inkscape::Selection *selection = SP_DT_SELECTION(desktop);
1255
1256     GSList *l = (GSList *) selection->itemList();
1257
1258     int changes = 0;
1259
1260     while (l) {
1261         SPItem *item = (SPItem *) l->data;
1262
1263         char const *value = (set_avoid) ? "true" : NULL;
1264
1265         if (cc_item_is_shape(item)) {
1266             sp_object_setAttribute(item, "inkscape:connector-avoid",
1267                     value, false);
1268             item->avoidRef->handleSettingChange();
1269             changes++;
1270         }
1271
1272         l = l->next;
1273     }
1274
1275     if (changes == 0) {
1276         desktop->messageStack()->flash(Inkscape::WARNING_MESSAGE,
1277                 _("Select <b>at least one non-connector object</b>."));
1278         return;
1279     }
1280
1281     sp_document_done(document);
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 :