src/connector-context.cpp

   1 /*
   2  * Connector creation tool
   3  *
   4  * Authors:
   5  *   Michael Wybrow <mjwybrow@users.sourceforge.net>
   6  *
   7  * Copyright (C) 2005 Michael Wybrow
   8  *
   9  * Released under GNU GPL, read the file 'COPYING' for more information
  10  *
  11  * TODO:
  12  *  o  Have shapes avoid convex hulls of objects, rather than their
  13  *     bounding box.  Possibly implement the unfinished ConvexHull
  14  *     class in libnr.
  15  *     (HOWEVER, using the convex hull C of a shape S does the wrong thing if a
  16  *     connector starts outside of S but inside C, or if the best route around
  17  *     an object involves going inside C but without entering S.)
  18  *  o  Draw connectors to shape edges rather than bounding box.
  19  *  o  Show a visual indicator for objects with the 'avoid' property set.
  20  *  o  Allow user to change a object between a path and connector through
  21  *     the interface.
  22  *  o  Create an interface for setting markers (arrow heads).
  23  *  o  Better distinguish between paths and connectors to prevent problems
  24  *     in the node tool and paths accidently being turned into connectors
  25  *     in the connector tool.  Perhaps have a way to convert between.
  26  *  o  Only call libavoid's updateEndPoint as required.  Currently we do it
  27  *     for both endpoints, even if only one is moving.
  28  *  o  Allow user-placeable connection points.
  29  *  o  Deal sanely with connectors with both endpoints attached to the
  30  *     same connection point, and drawing of connectors attaching
  31  *     overlaping shapes (currently tries to adjust connector to be
  32  *     outside both bounding boxes).
  33  *  o  Fix many special cases related to connectors updating,
  34  *     e.g., copying a couple of shapes and a connector that are
  35  *           attached to each other.
  36  *     e.g., detach connector when it is moved or transformed in
  37  *           one of the other contexts.
  38  *  o  Cope with shapes whose ids change when they have attached
  39  *     connectors.
  40  *  o  gobble_motion_events(GDK_BUTTON1_MASK)?;
  41  *
  42  */
  43
  44 #include <gdk/gdkkeysyms.h>
  45 #include <string>
  46 #include <cstring>
  47
  48 #include "connector-context.h"
  49 #include "pixmaps/cursor-connector.xpm"
  50 #include "xml/node-event-vector.h"
  51 #include "xml/repr.h"
  52 #include "svg/svg.h"
  53 #include "desktop.h"
  54 #include "desktop-style.h"
  55 #include "desktop-affine.h"
  56 #include "desktop-handles.h"
  57 #include "document.h"
  58 #include "message-context.h"
  59 #include "message-stack.h"
  60 #include "selection.h"
  61 #include "inkscape.h"
  62 #include "prefs-utils.h"
  63 #include "sp-path.h"
  64 #include "display/canvas-bpath.h"
  65 #include "display/sodipodi-ctrl.h"
  66 #include <glibmm/i18n.h>
  67 #include "snap.h"
  68 #include "knot.h"
  69 #include "sp-conn-end.h"
  70 #include "conn-avoid-ref.h"
  71 #include "libavoid/vertices.h"
  72 #include "context-fns.h"
  73 #include "sp-namedview.h"
  74 #include "sp-text.h"
  75 #include "sp-flowtext.h"
  76 #include "display/curve.h"
  77
  78 static void sp_connector_context_class_init(SPConnectorContextClass *klass);
  79 static void sp_connector_context_init(SPConnectorContext *conn_context);
  80 static void sp_connector_context_dispose(GObject *object);
  81
  82 static void sp_connector_context_setup(SPEventContext *ec);
  83 static void sp_connector_context_finish(SPEventContext *ec);
  84 static gint sp_connector_context_root_handler(SPEventContext *ec, GdkEvent *event);
  85 static gint sp_connector_context_item_handler(SPEventContext *event_context, SPItem *item, GdkEvent *event);
  86
  87 // Stuff borrowed from DrawContext
  88 static void spcc_connector_set_initial_point(SPConnectorContext *cc, NR::Point const p);
  89 static void spcc_connector_set_subsequent_point(SPConnectorContext *cc, NR::Point const p);
  90 static void spcc_connector_finish_segment(SPConnectorContext *cc, NR::Point p);
  91 static void spcc_reset_colors(SPConnectorContext *cc);
  92 static void spcc_connector_finish(SPConnectorContext *cc);
  93 static void spcc_concat_colors_and_flush(SPConnectorContext *cc);
  94 static void spcc_flush_white(SPConnectorContext *cc, SPCurve *gc);
  95
  96 // Context event handlers
  97 static gint connector_handle_button_press(SPConnectorContext *const cc, GdkEventButton const &bevent);
  98 static gint connector_handle_motion_notify(SPConnectorContext *const cc, GdkEventMotion const &mevent);
  99 static gint connector_handle_button_release(SPConnectorContext *const cc, GdkEventButton const &revent);
 100 static gint connector_handle_key_press(SPConnectorContext *const cc, guint const keyval);
 101
 102 static void cc_set_active_shape(SPConnectorContext *cc, SPItem *item);
 103 static void cc_clear_active_shape(SPConnectorContext *cc);
 104 static void cc_set_active_conn(SPConnectorContext *cc, SPItem *item);
 105 static void cc_clear_active_conn(SPConnectorContext *cc);
 106 static gchar *conn_pt_handle_test(SPConnectorContext *cc, NR::Point& w);
 107 static bool cc_item_is_shape(SPItem *item);
 108 static void cc_selection_changed(Inkscape::Selection *selection, gpointer data);
 109 static void cc_connector_rerouting_finish(SPConnectorContext *const cc,
 110         NR::Point *const p);
 111
 112 static void shape_event_attr_deleted(Inkscape::XML::Node *repr,
 113         Inkscape::XML::Node *child, Inkscape::XML::Node *ref, gpointer data);
 114 static void shape_event_attr_changed(Inkscape::XML::Node *repr, gchar const *name,
 115         gchar const *old_value, gchar const *new_value, bool is_interactive,
 116         gpointer data);
 117
 118
 119 static NR::Point connector_drag_origin_w(0, 0);
 120 static bool connector_within_tolerance = false;
 121 static SPEventContextClass *parent_class;
 122
 123
 124 static Inkscape::XML::NodeEventVector shape_repr_events = {
 125     NULL, /* child_added */
 126     NULL, /* child_added */
 127     shape_event_attr_changed,
 128     NULL, /* content_changed */
 129     NULL  /* order_changed */
 130 };
 131
 132 static Inkscape::XML::NodeEventVector layer_repr_events = {
 133     NULL, /* child_added */
 134     shape_event_attr_deleted,
 135     NULL, /* child_added */
 136     NULL, /* content_changed */
 137     NULL  /* order_changed */
 138 };
 139
 140
 141 GType
 142 sp_connector_context_get_type(void)
 143 {
 144     static GType type = 0;
 145     if (!type) {
 146         GTypeInfo info = {
 147             sizeof(SPConnectorContextClass),
 148             NULL, NULL,
 149             (GClassInitFunc) sp_connector_context_class_init,
 150             NULL, NULL,
 151             sizeof(SPConnectorContext),
 152             4,
 153             (GInstanceInitFunc) sp_connector_context_init,
 154             NULL,   /* value_table */
 155         };
 156         type = g_type_register_static(SP_TYPE_EVENT_CONTEXT, "SPConnectorContext", &info, (GTypeFlags)0);
 157     }
 158     return type;
 159 }
 160
 161 static void
 162 sp_connector_context_class_init(SPConnectorContextClass *klass)
 163 {
 164     GObjectClass *object_class;
 165     SPEventContextClass *event_context_class;
 166
 167     object_class = (GObjectClass *) klass;
 168     event_context_class = (SPEventContextClass *) klass;
 169
 170     parent_class = (SPEventContextClass*)g_type_class_peek_parent(klass);
 171
 172     object_class->dispose = sp_connector_context_dispose;
 173
 174     event_context_class->setup = sp_connector_context_setup;
 175     event_context_class->finish = sp_connector_context_finish;
 176     event_context_class->root_handler = sp_connector_context_root_handler;
 177     event_context_class->item_handler = sp_connector_context_item_handler;
 178 }
 179
 180
 181 static void
 182 sp_connector_context_init(SPConnectorContext *cc)
 183 {
 184     SPEventContext *ec = SP_EVENT_CONTEXT(cc);
 185
 186     ec->cursor_shape = cursor_connector_xpm;
 187     ec->hot_x = 1;
 188     ec->hot_y = 1;
 189     ec->xp = 0;
 190     ec->yp = 0;
 191
 192     cc->red_color = 0xff00007f;
 193
 194     cc->newconn = NULL;
 195     cc->newConnRef = NULL;
 196
 197     cc->sel_changed_connection = sigc::connection();
 198
 199     cc->active_shape = NULL;
 200     cc->active_shape_repr = NULL;
 201     cc->active_shape_layer_repr = NULL;
 202
 203     cc->active_conn = NULL;
 204     cc->active_conn_repr = NULL;
 205
 206     cc->active_handle = NULL;
 207
 208     cc->clickeditem = NULL;
 209     cc->clickedhandle = NULL;
 210
 211     cc->connpthandle = NULL;
 212     for (int i = 0; i < 2; ++i) {
 213         cc->endpt_handle[i] = NULL;
 214         cc->endpt_handler_id[i] = 0;
 215     }
 216     cc->sid = NULL;
 217     cc->eid = NULL;
 218     cc->npoints = 0;
 219     cc->state = SP_CONNECTOR_CONTEXT_IDLE;
 220 }
 221
 222
 223 static void
 224 sp_connector_context_dispose(GObject *object)
 225 {
 226     SPConnectorContext *cc = SP_CONNECTOR_CONTEXT(object);
 227
 228     cc->sel_changed_connection.disconnect();
 229
 230     if (cc->connpthandle) {
 231         g_object_unref(cc->connpthandle);
 232         cc->connpthandle = NULL;
 233     }
 234     for (int i = 0; i < 2; ++i) {
 235         if (cc->endpt_handle[1]) {
 236             g_object_unref(cc->endpt_handle[i]);
 237             cc->endpt_handle[i] = NULL;
 238         }
 239     }
 240     if (cc->sid) {
 241         g_free(cc->sid);
 242         cc->sid = NULL;
 243     }
 244     if (cc->eid) {
 245         g_free(cc->eid);
 246         cc->eid = NULL;
 247     }
 248     g_assert( cc->newConnRef == NULL );
 249
 250     G_OBJECT_CLASS(parent_class)->dispose(object);
 251 }
 252
 253
 254 static void
 255 sp_connector_context_setup(SPEventContext *ec)
 256 {
 257     SPConnectorContext *cc = SP_CONNECTOR_CONTEXT(ec);
 258     SPDesktop *dt = ec->desktop;
 259
 260     if (((SPEventContextClass *) parent_class)->setup) {
 261         ((SPEventContextClass *) parent_class)->setup(ec);
 262     }
 263
 264     cc->selection = sp_desktop_selection(dt);
 265
 266     cc->sel_changed_connection.disconnect();
 267     cc->sel_changed_connection = cc->selection->connectChanged(
 268             sigc::bind(sigc::ptr_fun(&cc_selection_changed),
 269             (gpointer) cc));
 270
 271     /* Create red bpath */
 272     cc->red_bpath = sp_canvas_bpath_new(sp_desktop_sketch(ec->desktop), NULL);
 273     sp_canvas_bpath_set_stroke(SP_CANVAS_BPATH(cc->red_bpath), cc->red_color,
 274             1.0, SP_STROKE_LINEJOIN_MITER, SP_STROKE_LINECAP_BUTT);
 275     sp_canvas_bpath_set_fill(SP_CANVAS_BPATH(cc->red_bpath), 0x00000000,
 276             SP_WIND_RULE_NONZERO);
 277     /* Create red curve */
 278     cc->red_curve = new SPCurve(4);
 279
 280     /* Create green curve */
 281     cc->green_curve = new SPCurve(64);
 282
 283     // Notice the initial selection.
 284     cc_selection_changed(cc->selection, (gpointer) cc);
 285
 286     if (prefs_get_int_attribute("tools.connector", "selcue", 0) != 0) {
 287         ec->enableSelectionCue();
 288     }
 289
 290     // Make sure we see all enter events for canvas items,
 291     // even if a mouse button is depressed.
 292     dt->canvas->gen_all_enter_events = true;
 293 }
 294
 295
 296 static void
 297 sp_connector_context_finish(SPEventContext *ec)
 298 {
 299     SPConnectorContext *cc = SP_CONNECTOR_CONTEXT(ec);
 300
 301     spcc_connector_finish(cc);
 302
 303     if (((SPEventContextClass *) parent_class)->finish) {
 304         ((SPEventContextClass *) parent_class)->finish(ec);
 305     }
 306
 307     if (cc->selection) {
 308         cc->selection = NULL;
 309     }
 310     cc_clear_active_shape(cc);
 311     cc_clear_active_conn(cc);
 312
 313     // Restore the default event generating behaviour.
 314     SPDesktop *desktop = SP_EVENT_CONTEXT_DESKTOP(ec);
 315     desktop->canvas->gen_all_enter_events = false;
 316 }
 317
 318
 319 //-----------------------------------------------------------------------------
 320
 321
 322 static void
 323 cc_clear_active_shape(SPConnectorContext *cc)
 324 {
 325     if (cc->active_shape == NULL) {
 326         return;
 327     }
 328     g_assert( cc->active_shape_repr );
 329     g_assert( cc->active_shape_layer_repr );
 330
 331     cc->active_shape = NULL;
 332
 333     if (cc->active_shape_repr) {
 334         sp_repr_remove_listener_by_data(cc->active_shape_repr, cc);
 335         Inkscape::GC::release(cc->active_shape_repr);
 336         cc->active_shape_repr = NULL;
 337
 338         sp_repr_remove_listener_by_data(cc->active_shape_layer_repr, cc);
 339         Inkscape::GC::release(cc->active_shape_layer_repr);
 340         cc->active_shape_layer_repr = NULL;
 341     }
 342
 343     // Hide the center connection point if it exists.
 344     if (cc->connpthandle) {
 345         sp_knot_hide(cc->connpthandle);
 346     }
 347 }
 348
 349
 350 static void
 351 cc_clear_active_conn(SPConnectorContext *cc)
 352 {
 353     if (cc->active_conn == NULL) {
 354         return;
 355     }
 356     g_assert( cc->active_conn_repr );
 357
 358     cc->active_conn = NULL;
 359
 360     if (cc->active_conn_repr) {
 361         sp_repr_remove_listener_by_data(cc->active_conn_repr, cc);
 362         Inkscape::GC::release(cc->active_conn_repr);
 363         cc->active_conn_repr = NULL;
 364     }
 365
 366     // Hide the endpoint handles.
 367     for (int i = 0; i < 2; ++i) {
 368         if (cc->endpt_handle[i]) {
 369             sp_knot_hide(cc->endpt_handle[i]);
 370         }
 371     }
 372 }
 373
 374
 375 static gchar *
 376 conn_pt_handle_test(SPConnectorContext *cc, NR::Point& p)
 377 {
 378     // TODO: this will need to change when there are more connection
 379     //       points available for each shape.
 380
 381     SPKnot *centerpt = cc->connpthandle;
 382     if (cc->active_handle && (cc->active_handle == centerpt))
 383     {
 384         p = centerpt->pos;
 385         return g_strdup_printf("#%s", SP_OBJECT_ID(cc->active_shape));
 386     }
 387     return NULL;
 388 }
 389
 390
 391
 392 static gint
 393 sp_connector_context_item_handler(SPEventContext *event_context, SPItem *item, GdkEvent *event)
 394 {
 395     gint ret = FALSE;
 396
 397     SPDesktop *desktop = event_context->desktop;
 398
 399     SPConnectorContext *cc = SP_CONNECTOR_CONTEXT(event_context);
 400
 401     NR::Point p(event->button.x, event->button.y);
 402
 403     switch (event->type) {
 404         case GDK_BUTTON_RELEASE:
 405             if (event->button.button == 1 && !event_context->space_panning) {
 406                 if ((cc->state == SP_CONNECTOR_CONTEXT_DRAGGING) &&
 407                         (connector_within_tolerance))
 408                 {
 409                     spcc_reset_colors(cc);
 410                     cc->state = SP_CONNECTOR_CONTEXT_IDLE;
 411                 }
 412                 if (cc->state != SP_CONNECTOR_CONTEXT_IDLE) {
 413                     // Doing simething else like rerouting.
 414                     break;
 415                 }
 416                 // find out clicked item, disregarding groups, honoring Alt
 417                 SPItem *item_ungrouped = sp_event_context_find_item(desktop,
 418                         p, event->button.state & GDK_MOD1_MASK, TRUE);
 419
 420                 if (event->button.state & GDK_SHIFT_MASK) {
 421                     cc->selection->toggle(item_ungrouped);
 422                 } else {
 423                     cc->selection->set(item_ungrouped);
 424                 }
 425                 ret = TRUE;
 426             }
 427             break;
 428         case GDK_ENTER_NOTIFY:
 429         {
 430             if (cc_item_is_shape(item)) {
 431                 // This is a shape, so show connection point(s).
 432                 if (!(cc->active_shape) ||
 433                         // Don't show handle for another handle.
 434                         (item != ((SPItem *) cc->connpthandle))) {
 435                     cc_set_active_shape(cc, item);
 436                 }
 437             }
 438             ret = TRUE;
 439             break;
 440         }
 441         default:
 442             break;
 443     }
 444
 445     return ret;
 446 }
 447
 448
 449 gint
 450 sp_connector_context_root_handler(SPEventContext *ec, GdkEvent *event)
 451 {
 452     SPConnectorContext *const cc = SP_CONNECTOR_CONTEXT(ec);
 453
 454     gint ret = FALSE;
 455
 456     switch (event->type) {
 457         case GDK_BUTTON_PRESS:
 458             ret = connector_handle_button_press(cc, event->button);
 459             break;
 460
 461         case GDK_MOTION_NOTIFY:
 462             ret = connector_handle_motion_notify(cc, event->motion);
 463             break;
 464
 465         case GDK_BUTTON_RELEASE:
 466             ret = connector_handle_button_release(cc, event->button);
 467             break;
 468         case GDK_KEY_PRESS:
 469             ret = connector_handle_key_press(cc, get_group0_keyval (&event->key));
 470             break;
 471
 472         default:
 473             break;
 474     }
 475
 476     if (!ret) {
 477         gint (*const parent_root_handler)(SPEventContext *, GdkEvent *)
 478             = ((SPEventContextClass *) parent_class)->root_handler;
 479         if (parent_root_handler) {
 480             ret = parent_root_handler(ec, event);
 481         }
 482     }
 483
 484     return ret;
 485 }
 486
 487
 488 static gint
 489 connector_handle_button_press(SPConnectorContext *const cc, GdkEventButton const &bevent)
 490 {
 491     NR::Point const event_w(bevent.x, bevent.y);
 492     /* Find desktop coordinates */
 493     NR::Point p = cc->desktop->w2d(event_w);
 494     SPEventContext *event_context = SP_EVENT_CONTEXT(cc);
 495
 496     gint ret = FALSE;
 497     if ( bevent.button == 1 && !event_context->space_panning ) {
 498
 499         SPDesktop *desktop = SP_EVENT_CONTEXT_DESKTOP(cc);
 500
 501         if (Inkscape::have_viable_layer(desktop, cc->_message_context) == false) {
 502             return TRUE;
 503         }
 504
 505         NR::Point const event_w(bevent.x,
 506                                 bevent.y);
 507         connector_drag_origin_w = event_w;
 508         connector_within_tolerance = true;
 509
 510         NR::Point const event_dt = cc->desktop->w2d(event_w);
 511         switch (cc->state) {
 512             case SP_CONNECTOR_CONTEXT_STOP:
 513                 /* This is allowed, if we just cancelled curve */
 514             case SP_CONNECTOR_CONTEXT_IDLE:
 515             {
 516                 if ( cc->npoints == 0 ) {
 517                     /* Set start anchor */
 518                     NR::Point p;
 519
 520                     cc_clear_active_conn(cc);
 521
 522                     SP_EVENT_CONTEXT_DESKTOP(cc)->messageStack()->flash(Inkscape::NORMAL_MESSAGE, _("Creating new connector"));
 523
 524                     /* Create green anchor */
 525                     p = event_dt;
 526
 527                     // Test whether we clicked on a connection point
 528                     cc->sid = conn_pt_handle_test(cc, p);
 529
 530                     if (!cc->sid) {
 531                         // This is the first point, so just snap it to the grid
 532                         // as there's no other points to go off.
 533                         SnapManager &m = cc->desktop->namedview->snap_manager;
 534                         m.setup(cc->desktop);
 535                         m.freeSnapReturnByRef(Inkscape::Snapper::SNAPPOINT_NODE, p);
 536                     }
 537                     spcc_connector_set_initial_point(cc, p);
 538
 539                 }
 540                 cc->state = SP_CONNECTOR_CONTEXT_DRAGGING;
 541                 ret = TRUE;
 542                 break;
 543             }
 544             case SP_CONNECTOR_CONTEXT_DRAGGING:
 545             {
 546                 // This is the second click of a connector creation.
 547
 548                 spcc_connector_set_subsequent_point(cc, p);
 549                 spcc_connector_finish_segment(cc, p);
 550                 // Test whether we clicked on a connection point
 551                 cc->eid = conn_pt_handle_test(cc, p);
 552                 if (cc->npoints != 0) {
 553                     spcc_connector_finish(cc);
 554                 }
 555                 cc_set_active_conn(cc, cc->newconn);
 556                 cc->state = SP_CONNECTOR_CONTEXT_IDLE;
 557                 ret = TRUE;
 558                 break;
 559             }
 560             case SP_CONNECTOR_CONTEXT_CLOSE:
 561             {
 562                 g_warning("Button down in CLOSE state");
 563                 break;
 564             }
 565             default:
 566                 break;
 567         }
 568     } else if (bevent.button == 3) {
 569         if (cc->state == SP_CONNECTOR_CONTEXT_REROUTING) {
 570             // A context menu is going to be triggered here,
 571             // so end the rerouting operation.
 572             cc_connector_rerouting_finish(cc, &p);
 573
 574             cc->state = SP_CONNECTOR_CONTEXT_IDLE;
 575
 576             // Don't set ret to TRUE, so we drop through to the
 577             // parent handler which will open the context menu.
 578         }
 579         else if (cc->npoints != 0) {
 580             spcc_connector_finish(cc);
 581             ret = TRUE;
 582         }
 583     }
 584     return ret;
 585 }
 586
 587
 588 static gint
 589 connector_handle_motion_notify(SPConnectorContext *const cc, GdkEventMotion const &mevent)
 590 {
 591     gint ret = FALSE;
 592     SPEventContext *event_context = SP_EVENT_CONTEXT(cc);
 593
 594     if (event_context->space_panning || mevent.state & GDK_BUTTON2_MASK || mevent.state & GDK_BUTTON3_MASK) {
 595         // allow middle-button scrolling
 596         return FALSE;
 597     }
 598
 599     NR::Point const event_w(mevent.x, mevent.y);
 600
 601     if (connector_within_tolerance) {
 602         gint const tolerance = prefs_get_int_attribute_limited("options.dragtolerance",
 603                                                                "value", 0, 0, 100);
 604         if ( NR::LInfty( event_w - connector_drag_origin_w ) < tolerance ) {
 605             return FALSE;   // Do not drag if we're within tolerance from origin.
 606         }
 607     }
 608     // Once the user has moved farther than tolerance from the original location
 609     // (indicating they intend to move the object, not click), then always process
 610     // the motion notify coordinates as given (no snapping back to origin)
 611     connector_within_tolerance = false;
 612
 613     SPDesktop *const dt = cc->desktop;
 614
 615     /* Find desktop coordinates */
 616     NR::Point p = dt->w2d(event_w);
 617
 618     switch (cc->state) {
 619         case SP_CONNECTOR_CONTEXT_DRAGGING:
 620         {
 621             // This is movement during a connector creation.
 622
 623             if ( cc->npoints > 0 ) {
 624                 cc->selection->clear();
 625                 spcc_connector_set_subsequent_point(cc, p);
 626                 ret = TRUE;
 627             }
 628             break;
 629         }
 630         case SP_CONNECTOR_CONTEXT_REROUTING:
 631         {
 632             g_assert( SP_IS_PATH(cc->clickeditem));
 633
 634             // Update the hidden path
 635             NR::Matrix i2d = sp_item_i2d_affine(cc->clickeditem);
 636             NR::Matrix d2i = i2d.inverse();
 637             SPPath *path = SP_PATH(cc->clickeditem);
 638             SPCurve *curve = (SP_SHAPE(path))->curve;
 639             if (cc->clickedhandle == cc->endpt_handle[0]) {
 640                 NR::Point o = cc->endpt_handle[1]->pos;
 641                 curve->stretch_endpoints(p * d2i, o * d2i);
 642             }
 643             else {
 644                 NR::Point o = cc->endpt_handle[0]->pos;
 645                 curve->stretch_endpoints(o * d2i, p * d2i);
 646             }
 647             sp_conn_adjust_path(path);
 648
 649             // Copy this to the temporary visible path
 650             cc->red_curve = SP_SHAPE(path)->curve->copy();
 651             cc->red_curve->transform(i2d);
 652
 653             sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(cc->red_bpath), cc->red_curve);
 654             ret = TRUE;
 655             break;
 656         }
 657         case SP_CONNECTOR_CONTEXT_STOP:
 658             /* This is perfectly valid */
 659             break;
 660         default:
 661             break;
 662     }
 663
 664     return ret;
 665 }
 666
 667
 668 static gint
 669 connector_handle_button_release(SPConnectorContext *const cc, GdkEventButton const &revent)
 670 {
 671     gint ret = FALSE;
 672     SPEventContext *event_context = SP_EVENT_CONTEXT(cc);
 673     if ( revent.button == 1 && !event_context->space_panning ) {
 674
 675         SPDesktop *desktop = SP_EVENT_CONTEXT_DESKTOP(cc);
 676         SPDocument *doc = sp_desktop_document(desktop);
 677
 678         NR::Point const event_w(revent.x, revent.y);
 679
 680         /* Find desktop coordinates */
 681         NR::Point p = cc->desktop->w2d(event_w);
 682
 683         switch (cc->state) {
 684             //case SP_CONNECTOR_CONTEXT_POINT:
 685             case SP_CONNECTOR_CONTEXT_DRAGGING:
 686             {
 687                 if (connector_within_tolerance)
 688                 {
 689                     spcc_connector_finish_segment(cc, p);
 690                     return TRUE;
 691                 }
 692                 // Connector has been created via a drag, end it now.
 693                 spcc_connector_set_subsequent_point(cc, p);
 694                 spcc_connector_finish_segment(cc, p);
 695                 // Test whether we clicked on a connection point
 696                 cc->eid = conn_pt_handle_test(cc, p);
 697                 if (cc->npoints != 0) {
 698                     spcc_connector_finish(cc);
 699                 }
 700                 cc_set_active_conn(cc, cc->newconn);
 701                 cc->state = SP_CONNECTOR_CONTEXT_IDLE;
 702                 break;
 703             }
 704             case SP_CONNECTOR_CONTEXT_REROUTING:
 705             {
 706                 cc_connector_rerouting_finish(cc, &p);
 707
 708                 sp_document_ensure_up_to_date(doc);
 709                 cc->state = SP_CONNECTOR_CONTEXT_IDLE;
 710                 return TRUE;
 711                 break;
 712             }
 713             case SP_CONNECTOR_CONTEXT_STOP:
 714                 /* This is allowed, if we just cancelled curve */
 715                 break;
 716             default:
 717                 break;
 718         }
 719         ret = TRUE;
 720     }
 721
 722     return ret;
 723 }
 724
 725
 726 static gint
 727 connector_handle_key_press(SPConnectorContext *const cc, guint const keyval)
 728 {
 729     gint ret = FALSE;
 730     /* fixme: */
 731     switch (keyval) {
 732         case GDK_Return:
 733         case GDK_KP_Enter:
 734             if (cc->npoints != 0) {
 735                 spcc_connector_finish(cc);
 736                 ret = TRUE;
 737             }
 738             break;
 739         case GDK_Escape:
 740             if (cc->state == SP_CONNECTOR_CONTEXT_REROUTING) {
 741
 742                 SPDesktop *desktop = SP_EVENT_CONTEXT_DESKTOP(cc);
 743                 SPDocument *doc = sp_desktop_document(desktop);
 744
 745                 cc_connector_rerouting_finish(cc, NULL);
 746
 747                 sp_document_undo(doc);
 748
 749                 cc->state = SP_CONNECTOR_CONTEXT_IDLE;
 750                 desktop->messageStack()->flash( Inkscape::NORMAL_MESSAGE,
 751                         _("Connector endpoint drag cancelled."));
 752                 ret = TRUE;
 753             }
 754             else if (cc->npoints != 0) {
 755                 // if drawing, cancel, otherwise pass it up for deselecting
 756                 cc->state = SP_CONNECTOR_CONTEXT_STOP;
 757                 spcc_reset_colors(cc);
 758                 ret = TRUE;
 759             }
 760             break;
 761         default:
 762             break;
 763     }
 764     return ret;
 765 }
 766
 767
 768 static void
 769 cc_connector_rerouting_finish(SPConnectorContext *const cc, NR::Point *const p)
 770 {
 771     SPDesktop *desktop = SP_EVENT_CONTEXT_DESKTOP(cc);
 772     SPDocument *doc = sp_desktop_document(desktop);
 773
 774     // Clear the temporary path:
 775     cc->red_curve->reset();
 776     sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(cc->red_bpath), NULL);
 777
 778     if (p != NULL)
 779     {
 780         // Test whether we clicked on a connection point
 781         gchar *shape_label = conn_pt_handle_test(cc, *p);
 782
 783         if (shape_label) {
 784             if (cc->clickedhandle == cc->endpt_handle[0]) {
 785                 sp_object_setAttribute(cc->clickeditem,
 786                         "inkscape:connection-start",shape_label, false);
 787             }
 788             else {
 789                 sp_object_setAttribute(cc->clickeditem,
 790                         "inkscape:connection-end",shape_label, false);
 791             }
 792             g_free(shape_label);
 793         }
 794     }
 795     cc->clickeditem->setHidden(false);
 796     sp_conn_adjust_path(SP_PATH(cc->clickeditem));
 797     cc->clickeditem->updateRepr();
 798     sp_document_done(doc, SP_VERB_CONTEXT_CONNECTOR,
 799                      _("Reroute connector"));
 800     cc_set_active_conn(cc, cc->clickeditem);
 801 }
 802
 803
 804 static void
 805 spcc_reset_colors(SPConnectorContext *cc)
 806 {
 807     /* Red */
 808     cc->red_curve->reset();
 809     sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(cc->red_bpath), NULL);
 810
 811     cc->green_curve->reset();
 812     cc->npoints = 0;
 813 }
 814
 815
 816 static void
 817 spcc_connector_set_initial_point(SPConnectorContext *const cc, NR::Point const p)
 818 {
 819     g_assert( cc->npoints == 0 );
 820
 821     cc->p[0] = p;
 822     cc->p[1] = p;
 823     cc->npoints = 2;
 824     sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(cc->red_bpath), NULL);
 825 }
 826
 827
 828 static void
 829 spcc_connector_set_subsequent_point(SPConnectorContext *const cc, NR::Point const p)
 830 {
 831     g_assert( cc->npoints != 0 );
 832
 833     SPDesktop *dt = cc->desktop;
 834     NR::Point o = dt->dt2doc(cc->p[0]);
 835     NR::Point d = dt->dt2doc(p);
 836     Avoid::Point src(o[NR::X], o[NR::Y]);
 837     Avoid::Point dst(d[NR::X], d[NR::Y]);
 838
 839     if (!cc->newConnRef) {
 840         Avoid::Router *router = sp_desktop_document(dt)->router;
 841         cc->newConnRef = new Avoid::ConnRef(router, 0, src, dst);
 842         cc->newConnRef->updateEndPoint(Avoid::VertID::src, src);
 843     }
 844     cc->newConnRef->updateEndPoint(Avoid::VertID::tar, dst);
 845
 846     cc->newConnRef->makePathInvalid();
 847     cc->newConnRef->generatePath(src, dst);
 848
 849     Avoid::PolyLine route = cc->newConnRef->route();
 850     cc->newConnRef->calcRouteDist();
 851
 852     cc->red_curve->reset();
 853     NR::Point pt(route.ps[0].x, route.ps[0].y);
 854     cc->red_curve->moveto(pt);
 855
 856     for (int i = 1; i < route.pn; ++i) {
 857         NR::Point p(route.ps[i].x, route.ps[i].y);
 858         cc->red_curve->lineto(p);
 859     }
 860     cc->red_curve->transform(dt->doc2dt());
 861     sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(cc->red_bpath), cc->red_curve);
 862 }
 863
 864
 865 /**
 866  * Concats red, blue and green.
 867  * If any anchors are defined, process these, optionally removing curves from white list
 868  * Invoke _flush_white to write result back to object.
 869  */
 870 static void
 871 spcc_concat_colors_and_flush(SPConnectorContext *cc)
 872 {
 873     SPCurve *c = cc->green_curve;
 874     cc->green_curve = new SPCurve(64);
 875
 876     cc->red_curve->reset();
 877     sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(cc->red_bpath), NULL);
 878
 879     if (c->is_empty()) {
 880         c->unref();
 881         return;
 882     }
 883
 884     spcc_flush_white(cc, c);
 885
 886     c->unref();
 887 }
 888
 889
 890 /*
 891  * Flushes white curve(s) and additional curve into object
 892  *
 893  * No cleaning of colored curves - this has to be done by caller
 894  * No rereading of white data, so if you cannot rely on ::modified, do it in caller
 895  *
 896  */
 897
 898 static void
 899 spcc_flush_white(SPConnectorContext *cc, SPCurve *gc)
 900 {
 901     SPCurve *c;
 902
 903     if (gc) {
 904         c = gc;
 905         c->ref();
 906     } else {
 907         return;
 908     }
 909
 910     /* Now we have to go back to item coordinates at last */
 911     c->transform(sp_desktop_dt2root_affine(SP_EVENT_CONTEXT_DESKTOP(cc)));
 912
 913     SPDesktop *desktop = SP_EVENT_CONTEXT_DESKTOP(cc);
 914     SPDocument *doc = sp_desktop_document(desktop);
 915     Inkscape::XML::Document *xml_doc = sp_document_repr_doc(doc);
 916
 917     if ( c && !c->is_empty() ) {
 918         /* We actually have something to write */
 919
 920         Inkscape::XML::Node *repr = xml_doc->createElement("svg:path");
 921         /* Set style */
 922         sp_desktop_apply_style_tool(desktop, repr, "tools.connector", false);
 923
 924         gchar *str = sp_svg_write_path(SP_CURVE_BPATH(c));
 925         g_assert( str != NULL );
 926         repr->setAttribute("d", str);
 927         g_free(str);
 928
 929         /* Attach repr */
 930         cc->newconn = SP_ITEM(desktop->currentLayer()->appendChildRepr(repr));
 931         cc->selection->set(repr);
 932         Inkscape::GC::release(repr);
 933         cc->newconn->transform = i2i_affine(desktop->currentRoot(), desktop->currentLayer());
 934         cc->newconn->updateRepr();
 935
 936         bool connection = false;
 937         sp_object_setAttribute(cc->newconn, "inkscape:connector-type",
 938                 "polyline", false);
 939         if (cc->sid)
 940         {
 941             sp_object_setAttribute(cc->newconn, "inkscape:connection-start",
 942                     cc->sid, false);
 943             connection = true;
 944         }
 945
 946         if (cc->eid)
 947         {
 948             sp_object_setAttribute(cc->newconn, "inkscape:connection-end",
 949                     cc->eid, false);
 950             connection = true;
 951         }
 952         cc->newconn->updateRepr();
 953         if (connection) {
 954             // Adjust endpoints to shape edge.
 955             sp_conn_adjust_path(SP_PATH(cc->newconn));
 956         }
 957         cc->newconn->updateRepr();
 958     }
 959
 960     c->unref();
 961
 962     /* Flush pending updates */
 963     sp_document_done(doc, SP_VERB_CONTEXT_CONNECTOR, _("Create connector"));
 964     sp_document_ensure_up_to_date(doc);
 965 }
 966
 967
 968 static void
 969 spcc_connector_finish_segment(SPConnectorContext *const cc, NR::Point const /*p*/)
 970 {
 971     if (!cc->red_curve->is_empty()) {
 972         cc->green_curve->append_continuous(cc->red_curve, 0.0625);
 973
 974         cc->p[0] = cc->p[3];
 975         cc->p[1] = cc->p[4];
 976         cc->npoints = 2;
 977
 978         cc->red_curve->reset();
 979     }
 980 }
 981
 982
 983 static void
 984 spcc_connector_finish(SPConnectorContext *const cc)
 985 {
 986     SPDesktop *const desktop = cc->desktop;
 987     desktop->messageStack()->flash(Inkscape::NORMAL_MESSAGE, _("Finishing connector"));
 988
 989     cc->red_curve->reset();
 990     spcc_concat_colors_and_flush(cc);
 991
 992     cc->npoints = 0;
 993
 994     if (cc->newConnRef) {
 995         cc->newConnRef->removeFromGraph();
 996         delete cc->newConnRef;
 997         cc->newConnRef = NULL;
 998     }
 999     cc->state = SP_CONNECTOR_CONTEXT_IDLE;
1000 }
1001
1002
1003 static gboolean
1004 cc_generic_knot_handler(SPCanvasItem *, GdkEvent *event, SPKnot *knot)
1005 {
1006     g_assert (knot != NULL);
1007
1008     g_object_ref(knot);
1009
1010     SPConnectorContext *cc = SP_CONNECTOR_CONTEXT(
1011             knot->desktop->event_context);
1012
1013     gboolean consumed = FALSE;
1014
1015     switch (event->type) {
1016         case GDK_ENTER_NOTIFY:
1017             sp_knot_set_flag(knot, SP_KNOT_MOUSEOVER, TRUE);
1018
1019             cc->active_handle = knot;
1020
1021             if (knot->tip)
1022             {
1023                 knot->desktop->event_context->defaultMessageContext()->set(
1024                         Inkscape::NORMAL_MESSAGE, knot->tip);
1025             }
1026
1027             consumed = TRUE;
1028             break;
1029         case GDK_LEAVE_NOTIFY:
1030             sp_knot_set_flag(knot, SP_KNOT_MOUSEOVER, FALSE);
1031
1032             cc->active_handle = NULL;
1033
1034             if (knot->tip) {
1035                 knot->desktop->event_context->defaultMessageContext()->clear();
1036             }
1037
1038             consumed = TRUE;
1039             break;
1040         default:
1041             break;
1042     }
1043
1044     g_object_unref(knot);
1045
1046     return consumed;
1047 }
1048
1049
1050 static gboolean
1051 endpt_handler(SPKnot */*knot*/, GdkEvent *event, SPConnectorContext *cc)
1052 {
1053     g_assert( SP_IS_CONNECTOR_CONTEXT(cc) );
1054
1055     gboolean consumed = FALSE;
1056
1057     switch (event->type) {
1058         case GDK_BUTTON_PRESS:
1059             g_assert( (cc->active_handle == cc->endpt_handle[0]) ||
1060                       (cc->active_handle == cc->endpt_handle[1]) );
1061             if (cc->state == SP_CONNECTOR_CONTEXT_IDLE) {
1062                 cc->clickeditem = cc->active_conn;
1063                 cc->clickedhandle = cc->active_handle;
1064                 cc_clear_active_conn(cc);
1065                 cc->state = SP_CONNECTOR_CONTEXT_REROUTING;
1066
1067                 // Disconnect from attached shape
1068                 unsigned ind = (cc->active_handle == cc->endpt_handle[0]) ? 0 : 1;
1069                 sp_conn_end_detach(cc->clickeditem, ind);
1070
1071                 NR::Point origin;
1072                 if (cc->clickedhandle == cc->endpt_handle[0]) {
1073                     origin = cc->endpt_handle[1]->pos;
1074                 }
1075                 else {
1076                     origin = cc->endpt_handle[0]->pos;
1077                 }
1078
1079                 // Show the red path for dragging.
1080                 cc->red_curve = SP_PATH(cc->clickeditem)->curve->copy();
1081                 NR::Matrix i2d = sp_item_i2d_affine(cc->clickeditem);
1082                 cc->red_curve->transform(i2d);
1083                 sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(cc->red_bpath), cc->red_curve);
1084
1085                 cc->clickeditem->setHidden(true);
1086
1087                 // The rest of the interaction rerouting the connector is
1088                 // handled by the context root handler.
1089                 consumed = TRUE;
1090             }
1091             break;
1092         default:
1093             break;
1094     }
1095
1096     return consumed;
1097 }
1098
1099
1100 static void cc_set_active_shape(SPConnectorContext *cc, SPItem *item)
1101 {
1102     g_assert(item != NULL );
1103
1104     cc->active_shape = item;
1105
1106     // Remove existing active shape listeners
1107     if (cc->active_shape_repr) {
1108         sp_repr_remove_listener_by_data(cc->active_shape_repr, cc);
1109         Inkscape::GC::release(cc->active_shape_repr);
1110
1111         sp_repr_remove_listener_by_data(cc->active_shape_layer_repr, cc);
1112         Inkscape::GC::release(cc->active_shape_layer_repr);
1113     }
1114
1115     // Listen in case the active shape changes
1116     cc->active_shape_repr = SP_OBJECT_REPR(item);
1117     if (cc->active_shape_repr) {
1118         Inkscape::GC::anchor(cc->active_shape_repr);
1119         sp_repr_add_listener(cc->active_shape_repr, &shape_repr_events, cc);
1120
1121         cc->active_shape_layer_repr = cc->active_shape_repr->parent();
1122         Inkscape::GC::anchor(cc->active_shape_layer_repr);
1123         sp_repr_add_listener(cc->active_shape_layer_repr, &layer_repr_events, cc);
1124     }
1125
1126
1127     // Set center connection point.
1128     if ( cc->connpthandle == NULL ) {
1129         SPKnot *knot = sp_knot_new(cc->desktop,
1130                 _("<b>Connection point</b>: click or drag to create a new connector"));
1131
1132         knot->setShape(SP_KNOT_SHAPE_SQUARE);
1133         knot->setSize(8);
1134         knot->setAnchor(GTK_ANCHOR_CENTER);
1135         knot->setFill(0xffffff00, 0xff0000ff, 0xff0000ff);
1136         sp_knot_update_ctrl(knot);
1137
1138         // We don't want to use the standard knot handler,
1139         //since we don't want this knot to be draggable.
1140         g_signal_handler_disconnect(G_OBJECT(knot->item),
1141                 knot->_event_handler_id);
1142         knot->_event_handler_id = 0;
1143
1144         gtk_signal_connect(GTK_OBJECT(knot->item), "event",
1145                 GTK_SIGNAL_FUNC(cc_generic_knot_handler), knot);
1146
1147         cc->connpthandle = knot;
1148     }
1149
1150
1151     NR::Maybe<NR::Rect> bbox = sp_item_bbox_desktop(cc->active_shape);
1152     if (bbox) {
1153         NR::Point center = bbox->midpoint();
1154         sp_knot_set_position(cc->connpthandle, &center, 0);
1155         sp_knot_show(cc->connpthandle);
1156     } else {
1157         sp_knot_hide(cc->connpthandle);
1158     }
1159 }
1160
1161
1162 static void
1163 cc_set_active_conn(SPConnectorContext *cc, SPItem *item)
1164 {
1165     g_assert( SP_IS_PATH(item) );
1166
1167     SPCurve *curve = SP_SHAPE(SP_PATH(item))->curve;
1168     NR::Matrix i2d = sp_item_i2d_affine(item);
1169
1170     if (cc->active_conn == item)
1171     {
1172         // Just adjust handle positions.
1173         NR::Point startpt = curve->first_point() * i2d;
1174         sp_knot_set_position(cc->endpt_handle[0], &startpt, 0);
1175
1176         NR::Point endpt = curve->last_point() * i2d;
1177         sp_knot_set_position(cc->endpt_handle[1], &endpt, 0);
1178
1179         return;
1180     }
1181
1182     cc->active_conn = item;
1183
1184     // Remove existing active conn listeners
1185     if (cc->active_conn_repr) {
1186         sp_repr_remove_listener_by_data(cc->active_conn_repr, cc);
1187         Inkscape::GC::release(cc->active_conn_repr);
1188         cc->active_conn_repr = NULL;
1189     }
1190
1191     // Listen in case the active conn changes
1192     cc->active_conn_repr = SP_OBJECT_REPR(item);
1193     if (cc->active_conn_repr) {
1194         Inkscape::GC::anchor(cc->active_conn_repr);
1195         sp_repr_add_listener(cc->active_conn_repr, &shape_repr_events, cc);
1196     }
1197
1198     for (int i = 0; i < 2; ++i) {
1199
1200         // Create the handle if it doesn't exist
1201         if ( cc->endpt_handle[i] == NULL ) {
1202             SPKnot *knot = sp_knot_new(cc->desktop,
1203                     _("<b>Connector endpoint</b>: drag to reroute or connect to new shapes"));
1204
1205             knot->setShape(SP_KNOT_SHAPE_SQUARE);
1206             knot->setSize(7);
1207             knot->setAnchor(GTK_ANCHOR_CENTER);
1208             knot->setFill(0xffffff00, 0xff0000ff, 0xff0000ff);
1209             knot->setStroke(0x000000ff, 0x000000ff, 0x000000ff);
1210             sp_knot_update_ctrl(knot);
1211
1212             // We don't want to use the standard knot handler,
1213             //since we don't want this knot to be draggable.
1214             g_signal_handler_disconnect(G_OBJECT(knot->item),
1215                     knot->_event_handler_id);
1216             knot->_event_handler_id = 0;
1217
1218             gtk_signal_connect(GTK_OBJECT(knot->item), "event",
1219                     GTK_SIGNAL_FUNC(cc_generic_knot_handler), knot);
1220
1221             cc->endpt_handle[i] = knot;
1222         }
1223
1224         // Remove any existing handlers
1225         if (cc->endpt_handler_id[i]) {
1226             g_signal_handlers_disconnect_by_func(
1227                     G_OBJECT(cc->endpt_handle[i]->item),
1228                     (void*)G_CALLBACK(endpt_handler), (gpointer) cc );
1229             cc->endpt_handler_id[i] = 0;
1230         }
1231
1232         // Setup handlers for connector endpoints, this is
1233         // is as 'after' so that cc_generic_knot_handler is
1234         // triggered first for any endpoint.
1235         cc->endpt_handler_id[i] = g_signal_connect_after(
1236                 G_OBJECT(cc->endpt_handle[i]->item), "event",
1237                 G_CALLBACK(endpt_handler), cc);
1238     }
1239
1240     NR::Point startpt = curve->first_point() * i2d;
1241     sp_knot_set_position(cc->endpt_handle[0], &startpt, 0);
1242
1243     NR::Point endpt = curve->last_point() * i2d;
1244     sp_knot_set_position(cc->endpt_handle[1], &endpt, 0);
1245
1246     sp_knot_show(cc->endpt_handle[0]);
1247     sp_knot_show(cc->endpt_handle[1]);
1248 }
1249
1250
1251 static bool cc_item_is_shape(SPItem *item)
1252 {
1253     if (SP_IS_PATH(item)) {
1254         SPCurve *curve = (SP_SHAPE(item))->curve;
1255         if ( curve && !(curve->is_closed()) ) {
1256             // Open paths are connectors.
1257             return false;
1258         }
1259     }
1260     else if (SP_IS_TEXT(item) || SP_IS_FLOWTEXT(item)) {
1261         if (prefs_get_int_attribute("tools.connector", "ignoretext", 1) == 1) {
1262             // Don't count text as a shape we can connect connector to.
1263             return false;
1264         }
1265     }
1266     return true;
1267 }
1268
1269
1270 bool cc_item_is_connector(SPItem *item)
1271 {
1272     if (SP_IS_PATH(item)) {
1273         if (SP_PATH(item)->connEndPair.isAutoRoutingConn()) {
1274             g_assert( !(SP_SHAPE(item)->curve->is_closed()) );
1275             return true;
1276         }
1277     }
1278     return false;
1279 }
1280
1281
1282 void cc_selection_set_avoid(bool const set_avoid)
1283 {
1284     SPDesktop *desktop = inkscape_active_desktop();
1285     if (desktop == NULL) {
1286         return;
1287     }
1288
1289     SPDocument *document = sp_desktop_document(desktop);
1290
1291     Inkscape::Selection *selection = sp_desktop_selection(desktop);
1292
1293     GSList *l = (GSList *) selection->itemList();
1294
1295     int changes = 0;
1296
1297     while (l) {
1298         SPItem *item = (SPItem *) l->data;
1299
1300         char const *value = (set_avoid) ? "true" : NULL;
1301
1302         if (cc_item_is_shape(item)) {
1303             sp_object_setAttribute(item, "inkscape:connector-avoid",
1304                     value, false);
1305             item->avoidRef->handleSettingChange();
1306             changes++;
1307         }
1308
1309         l = l->next;
1310     }
1311
1312     if (changes == 0) {
1313         desktop->messageStack()->flash(Inkscape::WARNING_MESSAGE,
1314                 _("Select <b>at least one non-connector object</b>."));
1315         return;
1316     }
1317
1318     char *event_desc = (set_avoid) ?
1319             _("Make connectors avoid selected objects") :
1320             _("Make connectors ignore selected objects");
1321     sp_document_done(document, SP_VERB_CONTEXT_CONNECTOR, event_desc);
1322 }
1323
1324
1325 static void
1326 cc_selection_changed(Inkscape::Selection *selection, gpointer data)
1327 {
1328     SPConnectorContext *cc = SP_CONNECTOR_CONTEXT(data);
1329     //SPEventContext *ec = SP_EVENT_CONTEXT(cc);
1330
1331     SPItem *item = selection->singleItem();
1332
1333     if (cc->active_conn == item)
1334     {
1335         // Nothing to change.
1336         return;
1337     }
1338     if (item == NULL)
1339     {
1340         cc_clear_active_conn(cc);
1341         return;
1342     }
1343
1344     if (cc_item_is_connector(item)) {
1345         cc_set_active_conn(cc, item);
1346     }
1347 }
1348
1349
1350 static void
1351 shape_event_attr_deleted(Inkscape::XML::Node */*repr*/, Inkscape::XML::Node *child,
1352                          Inkscape::XML::Node */*ref*/, gpointer data)
1353 {
1354     g_assert(data);
1355     SPConnectorContext *cc = SP_CONNECTOR_CONTEXT(data);
1356
1357     if (child == cc->active_shape_repr) {
1358         // The active shape has been deleted.  Clear active shape.
1359         cc_clear_active_shape(cc);
1360     }
1361 }
1362
1363
1364 static void
1365 shape_event_attr_changed(Inkscape::XML::Node *repr, gchar const *name,
1366                          gchar const */*old_value*/, gchar const */*new_value*/,
1367                          bool /*is_interactive*/, gpointer data)
1368 {
1369     g_assert(data);
1370     SPConnectorContext *cc = SP_CONNECTOR_CONTEXT(data);
1371
1372     // Look for changes than result in onscreen movement.
1373     if (!strcmp(name, "d") || !strcmp(name, "x") || !strcmp(name, "y") ||
1374             !strcmp(name, "width") || !strcmp(name, "height") ||
1375             !strcmp(name, "transform"))
1376     {
1377         if (repr == cc->active_shape_repr) {
1378             // Active shape has moved. Clear active shape.
1379             cc_clear_active_shape(cc);
1380         }
1381         else if (repr == cc->active_conn_repr) {
1382             // The active conn has been moved.
1383             // Set it again, which just sets new handle positions.
1384             cc_set_active_conn(cc, cc->active_conn);
1385         }
1386     }
1387 }
1388
1389
1390 /*
1391   Local Variables:
1392   mode:c++
1393   c-file-style:"stroustrup"
1394   c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
1395   indent-tabs-mode:nil
1396   fill-column:99
1397   End:
1398 */
1399 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :