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         cc->newConnRef = new Avoid::ConnRef(0, src, dst);
 792         cc->newConnRef->updateEndPoint(Avoid::VertID::src, src);
 793     }
 794     cc->newConnRef->updateEndPoint(Avoid::VertID::tar, dst);
 795
 796     cc->newConnRef->makePathInvalid();
 797     cc->newConnRef->generatePath(src, dst);
 798
 799     Avoid::PolyLine route = cc->newConnRef->route();
 800     cc->newConnRef->calcRouteDist();
 801
 802     sp_curve_reset(cc->red_curve);
 803     NR::Point pt(route.ps[0].x, route.ps[0].y);
 804     sp_curve_moveto(cc->red_curve, pt);
 805
 806     for (int i = 1; i < route.pn; ++i) {
 807         NR::Point p(route.ps[i].x, route.ps[i].y);
 808         sp_curve_lineto(cc->red_curve, p);
 809     }
 810     sp_curve_transform(cc->red_curve, dt->doc2dt());
 811     sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(cc->red_bpath), cc->red_curve);
 812 }
 813
 814
 815 /**
 816  * Concats red, blue and green.
 817  * If any anchors are defined, process these, optionally removing curves from white list
 818  * Invoke _flush_white to write result back to object.
 819  */
 820 static void
 821 spcc_concat_colors_and_flush(SPConnectorContext *cc)
 822 {
 823     SPCurve *c = cc->green_curve;
 824     cc->green_curve = sp_curve_new_sized(64);
 825
 826     sp_curve_reset(cc->red_curve);
 827     sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(cc->red_bpath), NULL);
 828
 829     if (sp_curve_empty(c)) {
 830         sp_curve_unref(c);
 831         return;
 832     }
 833
 834     spcc_flush_white(cc, c);
 835
 836     sp_curve_unref(c);
 837 }
 838
 839
 840 /*
 841  * Flushes white curve(s) and additional curve into object
 842  *
 843  * No cleaning of colored curves - this has to be done by caller
 844  * No rereading of white data, so if you cannot rely on ::modified, do it in caller
 845  *
 846  */
 847
 848 static void
 849 spcc_flush_white(SPConnectorContext *cc, SPCurve *gc)
 850 {
 851     SPCurve *c;
 852
 853     if (gc) {
 854         c = gc;
 855         sp_curve_ref(c);
 856     } else {
 857         return;
 858     }
 859
 860     /* Now we have to go back to item coordinates at last */
 861     sp_curve_transform(c,
 862             sp_desktop_dt2root_affine(SP_EVENT_CONTEXT_DESKTOP(cc)));
 863
 864     SPDesktop *desktop = SP_EVENT_CONTEXT_DESKTOP(cc);
 865     SPDocument *doc = SP_DT_DOCUMENT(desktop);
 866
 867     if ( c && !sp_curve_empty(c) ) {
 868         /* We actually have something to write */
 869
 870         Inkscape::XML::Node *repr = sp_repr_new("svg:path");
 871         /* Set style */
 872         sp_desktop_apply_style_tool(desktop, repr, "tools.connector", false);
 873
 874         gchar *str = sp_svg_write_path(SP_CURVE_BPATH(c));
 875         g_assert( str != NULL );
 876         repr->setAttribute("d", str);
 877         g_free(str);
 878
 879         /* Attach repr */
 880         cc->newconn = SP_ITEM(desktop->currentLayer()->appendChildRepr(repr));
 881         cc->selection->set(repr);
 882         Inkscape::GC::release(repr);
 883         cc->newconn->transform = i2i_affine(desktop->currentRoot(), desktop->currentLayer());
 884         cc->newconn->updateRepr();
 885
 886         bool connection = false;
 887         sp_object_setAttribute(cc->newconn, "inkscape:connector-type",
 888                 "polyline", false);
 889         if (cc->sid)
 890         {
 891             sp_object_setAttribute(cc->newconn, "inkscape:connection-start",
 892                     cc->sid, false);
 893             connection = true;
 894         }
 895
 896         if (cc->eid)
 897         {
 898             sp_object_setAttribute(cc->newconn, "inkscape:connection-end",
 899                     cc->eid, false);
 900             connection = true;
 901         }
 902         cc->newconn->updateRepr();
 903         if (connection) {
 904             // Adjust endpoints to shape edge.
 905             sp_conn_adjust_path(SP_PATH(cc->newconn));
 906         }
 907         cc->newconn->updateRepr();
 908     }
 909
 910     sp_curve_unref(c);
 911
 912     /* Flush pending updates */
 913     sp_document_done(doc);
 914     sp_document_ensure_up_to_date(doc);
 915 }
 916
 917
 918 static void
 919 spcc_connector_finish_segment(SPConnectorContext *const cc, NR::Point const p)
 920 {
 921     if (!sp_curve_empty(cc->red_curve)) {
 922         sp_curve_append_continuous(cc->green_curve, cc->red_curve, 0.0625);
 923
 924         cc->p[0] = cc->p[3];
 925         cc->p[1] = cc->p[4];
 926         cc->npoints = 2;
 927
 928         sp_curve_reset(cc->red_curve);
 929     }
 930 }
 931
 932
 933 static void
 934 spcc_connector_finish(SPConnectorContext *const cc)
 935 {
 936     SPDesktop *const desktop = cc->desktop;
 937     desktop->messageStack()->flash(Inkscape::NORMAL_MESSAGE, _("Finishing connector"));
 938
 939     sp_curve_reset(cc->red_curve);
 940     spcc_concat_colors_and_flush(cc);
 941
 942     cc->npoints = 0;
 943
 944     if (cc->newConnRef) {
 945         cc->newConnRef->removeFromGraph();
 946         delete cc->newConnRef;
 947         cc->newConnRef = NULL;
 948     }
 949     cc->state = SP_CONNECTOR_CONTEXT_IDLE;
 950 }
 951
 952
 953 static gboolean
 954 cc_generic_knot_handler(SPCanvasItem *, GdkEvent *event, SPKnot *knot)
 955 {
 956     g_assert (knot != NULL);
 957
 958     SPConnectorContext *cc = SP_CONNECTOR_CONTEXT(
 959             knot->desktop->event_context);
 960
 961     gboolean consumed = FALSE;
 962
 963     switch (event->type) {
 964         case GDK_ENTER_NOTIFY:
 965             gtk_object_set (GTK_OBJECT (knot->item), "fill_color",
 966                     knot->fill [SP_KNOT_STATE_MOUSEOVER], NULL);
 967             gtk_object_set (GTK_OBJECT (knot->item), "stroke_color",
 968                     knot->stroke [SP_KNOT_STATE_MOUSEOVER], NULL);
 969
 970             cc->active_handle = knot;
 971
 972             if (knot->tip)
 973             {
 974                 knot->desktop->event_context->defaultMessageContext()->set(
 975                         Inkscape::NORMAL_MESSAGE, knot->tip);
 976             }
 977
 978             consumed = TRUE;
 979             break;
 980         case GDK_LEAVE_NOTIFY:
 981             gtk_object_set (GTK_OBJECT (knot->item), "fill_color",
 982                     knot->fill [SP_KNOT_STATE_NORMAL], NULL);
 983             gtk_object_set (GTK_OBJECT (knot->item), "stroke_color",
 984                     knot->stroke [SP_KNOT_STATE_NORMAL], NULL);
 985
 986             cc->active_handle = NULL;
 987
 988             if (knot->tip) {
 989                 knot->desktop->event_context->defaultMessageContext()->clear();
 990             }
 991
 992             consumed = TRUE;
 993             break;
 994         default:
 995             break;
 996     }
 997
 998     return consumed;
 999 }
1000
1001
1002 static gboolean
1003 endpt_handler(SPKnot *knot, GdkEvent *event, SPConnectorContext *cc)
1004 {
1005     g_assert( SP_IS_CONNECTOR_CONTEXT(cc) );
1006
1007     gboolean consumed = FALSE;
1008
1009     switch (event->type) {
1010         case GDK_BUTTON_PRESS:
1011             g_assert( (cc->active_handle == cc->endpt_handle[0]) ||
1012                       (cc->active_handle == cc->endpt_handle[1]) );
1013             if (cc->state == SP_CONNECTOR_CONTEXT_IDLE) {
1014                 cc->clickeditem = cc->active_conn;
1015                 cc->clickedhandle = cc->active_handle;
1016                 cc_clear_active_conn(cc);
1017                 cc->state = SP_CONNECTOR_CONTEXT_REROUTING;
1018
1019                 // Disconnect from attached shape
1020                 unsigned ind = (cc->active_handle == cc->endpt_handle[0]) ? 0 : 1;
1021                 sp_conn_end_detach(cc->clickeditem, ind);
1022
1023                 NR::Point origin;
1024                 if (cc->clickedhandle == cc->endpt_handle[0]) {
1025                     origin = cc->endpt_handle[1]->pos;
1026                 }
1027                 else {
1028                     origin = cc->endpt_handle[0]->pos;
1029                 }
1030
1031                 // Show the red path for dragging.
1032                 cc->red_curve = sp_curve_copy(SP_PATH(cc->clickeditem)->curve);
1033                 NR::Matrix i2d = sp_item_i2d_affine(cc->clickeditem);
1034                 sp_curve_transform(cc->red_curve, i2d);
1035                 sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(cc->red_bpath),
1036                         cc->red_curve);
1037
1038                 cc->clickeditem->setHidden(true);
1039
1040                 // The rest of the interaction rerouting the connector is
1041                 // handled by the context root handler.
1042                 consumed = TRUE;
1043             }
1044             break;
1045         default:
1046             break;
1047     }
1048
1049     return consumed;
1050 }
1051
1052
1053 static void cc_set_active_shape(SPConnectorContext *cc, SPItem *item)
1054 {
1055     g_assert(item != NULL );
1056
1057     cc->active_shape = item;
1058
1059     // Remove existing active shape listeners
1060     if (cc->active_shape_repr) {
1061         sp_repr_remove_listener_by_data(cc->active_shape_repr, cc);
1062         Inkscape::GC::release(cc->active_shape_repr);
1063
1064         sp_repr_remove_listener_by_data(cc->active_shape_layer_repr, cc);
1065         Inkscape::GC::release(cc->active_shape_layer_repr);
1066     }
1067
1068     // Listen in case the active shape changes
1069     cc->active_shape_repr = SP_OBJECT_REPR(item);
1070     if (cc->active_shape_repr) {
1071         Inkscape::GC::anchor(cc->active_shape_repr);
1072         sp_repr_add_listener(cc->active_shape_repr, &shape_repr_events, cc);
1073
1074         cc->active_shape_layer_repr = cc->active_shape_repr->parent();
1075         Inkscape::GC::anchor(cc->active_shape_layer_repr);
1076         sp_repr_add_listener(cc->active_shape_layer_repr, &layer_repr_events, cc);
1077     }
1078
1079
1080     // Set center connection point.
1081     if ( cc->connpthandle == NULL ) {
1082         SPKnot * knot = (SPKnot*)g_object_new (SP_TYPE_KNOT, 0);
1083
1084         knot->desktop = cc->desktop;
1085         knot->flags = SP_KNOT_VISIBLE;
1086
1087         knot->item = sp_canvas_item_new (SP_DT_CONTROLS(cc->desktop),
1088                 SP_TYPE_CTRL,
1089                 "anchor", GTK_ANCHOR_CENTER,
1090                 "filled", TRUE,
1091                 "stroked", TRUE,
1092                 "mode", SP_KNOT_MODE_XOR,
1093                 NULL);
1094
1095         gtk_signal_connect (GTK_OBJECT (knot->item), "event",
1096                 GTK_SIGNAL_FUNC (cc_generic_knot_handler), knot);
1097
1098         knot->fill [SP_KNOT_STATE_NORMAL] = 0xffffff00;
1099         knot->fill [SP_KNOT_STATE_MOUSEOVER] = 0xff0000ff;
1100         knot->stroke [SP_KNOT_STATE_NORMAL] = 0x01000000;
1101
1102         g_object_set(G_OBJECT(knot),
1103                      "shape", SP_KNOT_SHAPE_SQUARE,
1104                      "size", 8,
1105                      "anchor", GTK_ANCHOR_CENTER,
1106                      "tip", _("<b>Connection point</b>: click or drag to create a new connector"),
1107                      NULL);
1108
1109         cc->connpthandle = knot;
1110     }
1111
1112
1113     NR::Rect bbox = sp_item_bbox_desktop(cc->active_shape);
1114     NR::Point center = bbox.midpoint();
1115     sp_knot_set_position(cc->connpthandle, &center, 0);
1116
1117     sp_knot_show(cc->connpthandle);
1118
1119 }
1120
1121
1122 static void
1123 cc_set_active_conn(SPConnectorContext *cc, SPItem *item)
1124 {
1125     g_assert( SP_IS_PATH(item) );
1126
1127     SPCurve *curve = SP_SHAPE(SP_PATH(item))->curve;
1128     NR::Matrix i2d = sp_item_i2d_affine(item);
1129
1130     if (cc->active_conn == item)
1131     {
1132         // Just adjust handle positions.
1133         NR::Point startpt = sp_curve_first_point(curve) * i2d;
1134         sp_knot_set_position(cc->endpt_handle[0], &startpt, 0);
1135
1136         NR::Point endpt = sp_curve_last_point(curve) * i2d;
1137         sp_knot_set_position(cc->endpt_handle[1], &endpt, 0);
1138
1139         return;
1140     }
1141
1142     cc->active_conn = item;
1143
1144     // Remove existing active conn listeners
1145     if (cc->active_conn_repr) {
1146         sp_repr_remove_listener_by_data(cc->active_conn_repr, cc);
1147         Inkscape::GC::release(cc->active_conn_repr);
1148         cc->active_conn_repr = NULL;
1149     }
1150
1151     // Listen in case the active conn changes
1152     cc->active_conn_repr = SP_OBJECT_REPR(item);
1153     if (cc->active_conn_repr) {
1154         Inkscape::GC::anchor(cc->active_conn_repr);
1155         sp_repr_add_listener(cc->active_conn_repr, &shape_repr_events, cc);
1156     }
1157
1158     for (int i = 0; i < 2; ++i) {
1159
1160         // Create the handle if it doesn't exist
1161         if ( cc->endpt_handle[i] == NULL ) {
1162             SPKnot * knot = (SPKnot*) g_object_new (SP_TYPE_KNOT, 0);
1163
1164             knot->desktop = cc->desktop;
1165             knot->flags = SP_KNOT_VISIBLE;
1166
1167             knot->item = sp_canvas_item_new (SP_DT_CONTROLS (cc->desktop),
1168                     SP_TYPE_CTRL,
1169                     "anchor", GTK_ANCHOR_CENTER,
1170                     "filled", TRUE,
1171                     "stroked", TRUE,
1172                     "mode", SP_KNOT_MODE_XOR,
1173                     NULL);
1174
1175             knot->fill [SP_KNOT_STATE_NORMAL] = 0xffffff00;
1176             knot->stroke [SP_KNOT_STATE_NORMAL] = 0x000000ff;
1177             knot->stroke [SP_KNOT_STATE_DRAGGING] = 0x000000ff;
1178             knot->stroke [SP_KNOT_STATE_MOUSEOVER] = 0x000000ff;
1179
1180             g_object_set(G_OBJECT(knot),
1181                     "shape", SP_KNOT_SHAPE_DIAMOND,
1182                     "size", 10,
1183                     "tip", _("<b>Connector endpoint</b>: drag to reroute or connect to new shapes"),
1184                     NULL);
1185
1186             gtk_signal_connect (GTK_OBJECT (knot->item), "event",
1187                     GTK_SIGNAL_FUNC (cc_generic_knot_handler), knot);
1188
1189             cc->endpt_handle[i] = knot;
1190         }
1191
1192         // Remove any existing handlers
1193         if (cc->endpt_handler_id[i]) {
1194             g_signal_handlers_disconnect_by_func(
1195                     G_OBJECT(cc->endpt_handle[i]->item),
1196                     (void*)G_CALLBACK(endpt_handler), (gpointer) cc );
1197             cc->endpt_handler_id[i] = 0;
1198         }
1199
1200         // Setup handlers for connector endpoints, this is
1201         // is as 'after' so that cc_generic_knot_handler is
1202         // triggered first for any endpoint.
1203         cc->endpt_handler_id[i] = g_signal_connect_after(
1204                 G_OBJECT(cc->endpt_handle[i]->item), "event",
1205                 G_CALLBACK(endpt_handler), cc);
1206     }
1207
1208     NR::Point startpt = sp_curve_first_point(curve) * i2d;
1209     sp_knot_set_position(cc->endpt_handle[0], &startpt, 0);
1210
1211     NR::Point endpt = sp_curve_last_point(curve) * i2d;
1212     sp_knot_set_position(cc->endpt_handle[1], &endpt, 0);
1213
1214     sp_knot_show(cc->endpt_handle[0]);
1215     sp_knot_show(cc->endpt_handle[1]);
1216 }
1217
1218
1219 static bool cc_item_is_shape(SPItem *item)
1220 {
1221     if (SP_IS_PATH(item)) {
1222         SPCurve *curve = (SP_SHAPE(item))->curve;
1223         if ( curve && !(curve->closed) ) {
1224             // Open paths are connectors.
1225             return false;
1226         }
1227     }
1228     return true;
1229 }
1230
1231
1232 bool cc_item_is_connector(SPItem *item)
1233 {
1234     if (SP_IS_PATH(item)) {
1235         if (SP_PATH(item)->connEndPair.isAutoRoutingConn()) {
1236             g_assert( !(SP_SHAPE(item)->curve->closed) );
1237             return true;
1238         }
1239     }
1240     return false;
1241 }
1242
1243
1244 void cc_selection_set_avoid(bool const set_avoid)
1245 {
1246     SPDesktop *desktop = inkscape_active_desktop();
1247     if (desktop == NULL) {
1248         return;
1249     }
1250
1251     SPDocument *document = SP_DT_DOCUMENT(desktop);
1252
1253     Inkscape::Selection *selection = SP_DT_SELECTION(desktop);
1254
1255     GSList *l = (GSList *) selection->itemList();
1256
1257     int changes = 0;
1258
1259     while (l) {
1260         SPItem *item = (SPItem *) l->data;
1261
1262         char const *value = (set_avoid) ? "true" : NULL;
1263
1264         if (cc_item_is_shape(item)) {
1265             sp_object_setAttribute(item, "inkscape:connector-avoid",
1266                     value, false);
1267             item->avoidRef->handleSettingChange();
1268             changes++;
1269         }
1270
1271         l = l->next;
1272     }
1273
1274     if (changes == 0) {
1275         desktop->messageStack()->flash(Inkscape::WARNING_MESSAGE,
1276                 _("Select <b>at least one non-connector object</b>."));
1277         return;
1278     }
1279
1280     sp_document_done(document);
1281 }
1282
1283
1284 static void
1285 cc_selection_changed(Inkscape::Selection *selection, gpointer data)
1286 {
1287     SPConnectorContext *cc = SP_CONNECTOR_CONTEXT(data);
1288     //SPEventContext *ec = SP_EVENT_CONTEXT(cc);
1289
1290     SPItem *item = selection->singleItem();
1291
1292     if (cc->active_conn == item)
1293     {
1294         // Nothing to change.
1295         return;
1296     }
1297     if (item == NULL)
1298     {
1299         cc_clear_active_conn(cc);
1300         return;
1301     }
1302
1303     if (cc_item_is_connector(item)) {
1304         cc_set_active_conn(cc, item);
1305     }
1306 }
1307
1308
1309 static void
1310 shape_event_attr_deleted(Inkscape::XML::Node *repr, Inkscape::XML::Node *child,
1311         Inkscape::XML::Node *ref, gpointer data)
1312 {
1313     g_assert(data);
1314     SPConnectorContext *cc = SP_CONNECTOR_CONTEXT(data);
1315
1316     if (child == cc->active_shape_repr) {
1317         // The active shape has been deleted.  Clear active shape.
1318         cc_clear_active_shape(cc);
1319     }
1320 }
1321
1322
1323 static void
1324 shape_event_attr_changed(Inkscape::XML::Node *repr, gchar const *name,
1325                             gchar const *old_value, gchar const *new_value,
1326                             bool is_interactive, gpointer data)
1327 {
1328     g_assert(data);
1329     SPConnectorContext *cc = SP_CONNECTOR_CONTEXT(data);
1330
1331     // Look for changes than result in onscreen movement.
1332     if (!strcmp(name, "d") || !strcmp(name, "x") || !strcmp(name, "y") ||
1333             !strcmp(name, "width") || !strcmp(name, "height") ||
1334             !strcmp(name, "transform"))
1335     {
1336         if (repr == cc->active_shape_repr) {
1337             // Active shape has moved. Clear active shape.
1338             cc_clear_active_shape(cc);
1339         }
1340         else if (repr == cc->active_conn_repr) {
1341             // The active conn has been moved.
1342             // Set it again, which just sets new handle positions.
1343             cc_set_active_conn(cc, cc->active_conn);
1344         }
1345     }
1346 }
1347
1348
1349 /*
1350   Local Variables:
1351   mode:c++
1352   c-file-style:"stroustrup"
1353   c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
1354   indent-tabs-mode:nil
1355   fill-column:99
1356   End:
1357 */
1358 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :