src/connector-context.cpp

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