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-handles.h"
  56 #include "document.h"
  57 #include "message-context.h"
  58 #include "message-stack.h"
  59 #include "selection.h"
  60 #include "inkscape.h"
  61 #include "preferences.h"
  62 #include "sp-path.h"
  63 #include "display/canvas-bpath.h"
  64 #include "display/sodipodi-ctrl.h"
  65 #include <glibmm/i18n.h>
  66 #include "snap.h"
  67 #include "knot.h"
  68 #include "sp-conn-end.h"
  69 #include "conn-avoid-ref.h"
  70 #include "libavoid/vertices.h"
  71 #include "context-fns.h"
  72 #include "sp-namedview.h"
  73 #include "sp-text.h"
  74 #include "sp-flowtext.h"
  75 #include "display/curve.h"
  76
  77 static void sp_connector_context_class_init(SPConnectorContextClass *klass);
  78 static void sp_connector_context_init(SPConnectorContext *conn_context);
  79 static void sp_connector_context_dispose(GObject *object);
  80
  81 static void sp_connector_context_setup(SPEventContext *ec);
  82 static void sp_connector_context_finish(SPEventContext *ec);
  83 static gint sp_connector_context_root_handler(SPEventContext *ec, GdkEvent *event);
  84 static gint sp_connector_context_item_handler(SPEventContext *event_context, SPItem *item, GdkEvent *event);
  85
  86 // Stuff borrowed from DrawContext
  87 static void spcc_connector_set_initial_point(SPConnectorContext *cc, Geom::Point const p);
  88 static void spcc_connector_set_subsequent_point(SPConnectorContext *cc, Geom::Point const p);
  89 static void spcc_connector_finish_segment(SPConnectorContext *cc, Geom::Point p);
  90 static void spcc_reset_colors(SPConnectorContext *cc);
  91 static void spcc_connector_finish(SPConnectorContext *cc);
  92 static void spcc_concat_colors_and_flush(SPConnectorContext *cc);
  93 static void spcc_flush_white(SPConnectorContext *cc, SPCurve *gc);
  94
  95 // Context event handlers
  96 static gint connector_handle_button_press(SPConnectorContext *const cc, GdkEventButton const &bevent);
  97 static gint connector_handle_motion_notify(SPConnectorContext *const cc, GdkEventMotion const &mevent);
  98 static gint connector_handle_button_release(SPConnectorContext *const cc, GdkEventButton const &revent);
  99 static gint connector_handle_key_press(SPConnectorContext *const cc, guint const keyval);
 100
 101 static void cc_set_active_shape(SPConnectorContext *cc, SPItem *item);
 102 static void cc_clear_active_shape(SPConnectorContext *cc);
 103 static void cc_set_active_conn(SPConnectorContext *cc, SPItem *item);
 104 static void cc_clear_active_conn(SPConnectorContext *cc);
 105 static gchar *conn_pt_handle_test(SPConnectorContext *cc, Geom::Point& w);
 106 static bool cc_item_is_shape(SPItem *item);
 107 static void cc_selection_changed(Inkscape::Selection *selection, gpointer data);
 108 static void cc_connector_rerouting_finish(SPConnectorContext *const cc,
 109         Geom::Point *const p);
 110
 111 static void shape_event_attr_deleted(Inkscape::XML::Node *repr,
 112         Inkscape::XML::Node *child, Inkscape::XML::Node *ref, gpointer data);
 113 static void shape_event_attr_changed(Inkscape::XML::Node *repr, gchar const *name,
 114         gchar const *old_value, gchar const *new_value, bool is_interactive,
 115         gpointer data);
 116
 117
 118 static Geom::Point connector_drag_origin_w(0, 0);
 119 static bool connector_within_tolerance = false;
 120 static SPEventContextClass *parent_class;
 121
 122
 123 static Inkscape::XML::NodeEventVector shape_repr_events = {
 124     NULL, /* child_added */
 125     NULL, /* child_added */
 126     shape_event_attr_changed,
 127     NULL, /* content_changed */
 128     NULL  /* order_changed */
 129 };
 130
 131 static Inkscape::XML::NodeEventVector layer_repr_events = {
 132     NULL, /* child_added */
 133     shape_event_attr_deleted,
 134     NULL, /* child_added */
 135     NULL, /* content_changed */
 136     NULL  /* order_changed */
 137 };
 138
 139
 140 GType
 141 sp_connector_context_get_type(void)
 142 {
 143     static GType type = 0;
 144     if (!type) {
 145         GTypeInfo info = {
 146             sizeof(SPConnectorContextClass),
 147             NULL, NULL,
 148             (GClassInitFunc) sp_connector_context_class_init,
 149             NULL, NULL,
 150             sizeof(SPConnectorContext),
 151             4,
 152             (GInstanceInitFunc) sp_connector_context_init,
 153             NULL,   /* value_table */
 154         };
 155         type = g_type_register_static(SP_TYPE_EVENT_CONTEXT, "SPConnectorContext", &info, (GTypeFlags)0);
 156     }
 157     return type;
 158 }
 159
 160 static void
 161 sp_connector_context_class_init(SPConnectorContextClass *klass)
 162 {
 163     GObjectClass *object_class;
 164     SPEventContextClass *event_context_class;
 165
 166     object_class = (GObjectClass *) klass;
 167     event_context_class = (SPEventContextClass *) klass;
 168
 169     parent_class = (SPEventContextClass*)g_type_class_peek_parent(klass);
 170
 171     object_class->dispose = sp_connector_context_dispose;
 172
 173     event_context_class->setup = sp_connector_context_setup;
 174     event_context_class->finish = sp_connector_context_finish;
 175     event_context_class->root_handler = sp_connector_context_root_handler;
 176     event_context_class->item_handler = sp_connector_context_item_handler;
 177 }
 178
 179
 180 static void
 181 sp_connector_context_init(SPConnectorContext *cc)
 182 {
 183     SPEventContext *ec = SP_EVENT_CONTEXT(cc);
 184
 185     ec->cursor_shape = cursor_connector_xpm;
 186     ec->hot_x = 1;
 187     ec->hot_y = 1;
 188     ec->xp = 0;
 189     ec->yp = 0;
 190
 191     cc->red_color = 0xff00007f;
 192
 193     cc->newconn = NULL;
 194     cc->newConnRef = NULL;
 195
 196     cc->sel_changed_connection = sigc::connection();
 197
 198     cc->active_shape = NULL;
 199     cc->active_shape_repr = NULL;
 200     cc->active_shape_layer_repr = NULL;
 201
 202     cc->active_conn = NULL;
 203     cc->active_conn_repr = NULL;
 204
 205     cc->active_handle = NULL;
 206
 207     cc->clickeditem = NULL;
 208     cc->clickedhandle = NULL;
 209
 210     cc->connpthandle = NULL;
 211     for (int i = 0; i < 2; ++i) {
 212         cc->endpt_handle[i] = NULL;
 213         cc->endpt_handler_id[i] = 0;
 214     }
 215     cc->sid = NULL;
 216     cc->eid = NULL;
 217     cc->npoints = 0;
 218     cc->state = SP_CONNECTOR_CONTEXT_IDLE;
 219 }
 220
 221
 222 static void
 223 sp_connector_context_dispose(GObject *object)
 224 {
 225     SPConnectorContext *cc = SP_CONNECTOR_CONTEXT(object);
 226
 227     cc->sel_changed_connection.disconnect();
 228
 229     if (cc->connpthandle) {
 230         g_object_unref(cc->connpthandle);
 231         cc->connpthandle = NULL;
 232     }
 233     for (int i = 0; i < 2; ++i) {
 234         if (cc->endpt_handle[1]) {
 235             g_object_unref(cc->endpt_handle[i]);
 236             cc->endpt_handle[i] = NULL;
 237         }
 238     }
 239     if (cc->sid) {
 240         g_free(cc->sid);
 241         cc->sid = NULL;
 242     }
 243     if (cc->eid) {
 244         g_free(cc->eid);
 245         cc->eid = NULL;
 246     }
 247     g_assert( cc->newConnRef == NULL );
 248
 249     G_OBJECT_CLASS(parent_class)->dispose(object);
 250 }
 251
 252
 253 static void
 254 sp_connector_context_setup(SPEventContext *ec)
 255 {
 256     SPConnectorContext *cc = SP_CONNECTOR_CONTEXT(ec);
 257     SPDesktop *dt = ec->desktop;
 258
 259     if (((SPEventContextClass *) parent_class)->setup) {
 260         ((SPEventContextClass *) parent_class)->setup(ec);
 261     }
 262
 263     cc->selection = sp_desktop_selection(dt);
 264
 265     cc->sel_changed_connection.disconnect();
 266     cc->sel_changed_connection = cc->selection->connectChanged(
 267             sigc::bind(sigc::ptr_fun(&cc_selection_changed),
 268             (gpointer) cc));
 269
 270     /* Create red bpath */
 271     cc->red_bpath = sp_canvas_bpath_new(sp_desktop_sketch(ec->desktop), NULL);
 272     sp_canvas_bpath_set_stroke(SP_CANVAS_BPATH(cc->red_bpath), cc->red_color,
 273             1.0, SP_STROKE_LINEJOIN_MITER, SP_STROKE_LINECAP_BUTT);
 274     sp_canvas_bpath_set_fill(SP_CANVAS_BPATH(cc->red_bpath), 0x00000000,
 275             SP_WIND_RULE_NONZERO);
 276     /* Create red curve */
 277     cc->red_curve = new SPCurve();
 278
 279     /* Create green curve */
 280     cc->green_curve = new SPCurve();
 281
 282     // Notice the initial selection.
 283     cc_selection_changed(cc->selection, (gpointer) cc);
 284
 285     Inkscape::Preferences *prefs = Inkscape::Preferences::get();
 286     if (prefs->getBool("/tools/connector/selcue", 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     cc->state = SP_CONNECTOR_CONTEXT_IDLE;
 303
 304     if (((SPEventContextClass *) parent_class)->finish) {
 305         ((SPEventContextClass *) parent_class)->finish(ec);
 306     }
 307
 308     if (cc->selection) {
 309         cc->selection = NULL;
 310     }
 311     cc_clear_active_shape(cc);
 312     cc_clear_active_conn(cc);
 313
 314     // Restore the default event generating behaviour.
 315     SPDesktop *desktop = SP_EVENT_CONTEXT_DESKTOP(ec);
 316     desktop->canvas->gen_all_enter_events = false;
 317 }
 318
 319
 320 //-----------------------------------------------------------------------------
 321
 322
 323 static void
 324 cc_clear_active_shape(SPConnectorContext *cc)
 325 {
 326     if (cc->active_shape == NULL) {
 327         return;
 328     }
 329     g_assert( cc->active_shape_repr );
 330     g_assert( cc->active_shape_layer_repr );
 331
 332     cc->active_shape = NULL;
 333
 334     if (cc->active_shape_repr) {
 335         sp_repr_remove_listener_by_data(cc->active_shape_repr, cc);
 336         Inkscape::GC::release(cc->active_shape_repr);
 337         cc->active_shape_repr = NULL;
 338
 339         sp_repr_remove_listener_by_data(cc->active_shape_layer_repr, cc);
 340         Inkscape::GC::release(cc->active_shape_layer_repr);
 341         cc->active_shape_layer_repr = NULL;
 342     }
 343
 344     // Hide the center connection point if it exists.
 345     if (cc->connpthandle) {
 346         sp_knot_hide(cc->connpthandle);
 347     }
 348 }
 349
 350
 351 static void
 352 cc_clear_active_conn(SPConnectorContext *cc)
 353 {
 354     if (cc->active_conn == NULL) {
 355         return;
 356     }
 357     g_assert( cc->active_conn_repr );
 358
 359     cc->active_conn = NULL;
 360
 361     if (cc->active_conn_repr) {
 362         sp_repr_remove_listener_by_data(cc->active_conn_repr, cc);
 363         Inkscape::GC::release(cc->active_conn_repr);
 364         cc->active_conn_repr = NULL;
 365     }
 366
 367     // Hide the endpoint handles.
 368     for (int i = 0; i < 2; ++i) {
 369         if (cc->endpt_handle[i]) {
 370             sp_knot_hide(cc->endpt_handle[i]);
 371         }
 372     }
 373 }
 374
 375
 376 static gchar *
 377 conn_pt_handle_test(SPConnectorContext *cc, Geom::Point& p)
 378 {
 379     // TODO: this will need to change when there are more connection
 380     //       points available for each shape.
 381
 382     SPKnot *centerpt = cc->connpthandle;
 383     if (cc->active_handle && (cc->active_handle == centerpt))
 384     {
 385         p = centerpt->pos;
 386         return g_strdup_printf("#%s", SP_OBJECT_ID(cc->active_shape));
 387     }
 388     return NULL;
 389 }
 390
 391
 392
 393 static gint
 394 sp_connector_context_item_handler(SPEventContext *event_context, SPItem *item, GdkEvent *event)
 395 {
 396     gint ret = FALSE;
 397
 398     SPDesktop *desktop = event_context->desktop;
 399
 400     SPConnectorContext *cc = SP_CONNECTOR_CONTEXT(event_context);
 401
 402     Geom::Point p(event->button.x, event->button.y);
 403
 404     switch (event->type) {
 405         case GDK_BUTTON_RELEASE:
 406             if (event->button.button == 1 && !event_context->space_panning) {
 407                 if ((cc->state == SP_CONNECTOR_CONTEXT_DRAGGING) &&
 408                         (connector_within_tolerance))
 409                 {
 410                     spcc_reset_colors(cc);
 411                     cc->state = SP_CONNECTOR_CONTEXT_IDLE;
 412                     sp_event_context_discard_delayed_snap_event(event_context);
 413                 }
 414                 if (cc->state != SP_CONNECTOR_CONTEXT_IDLE) {
 415                     // Doing simething else like rerouting.
 416                     break;
 417                 }
 418                 // find out clicked item, disregarding groups, honoring Alt
 419                 SPItem *item_ungrouped = sp_event_context_find_item(desktop,
 420                         p, event->button.state & GDK_MOD1_MASK, TRUE);
 421
 422                 if (event->button.state & GDK_SHIFT_MASK) {
 423                     cc->selection->toggle(item_ungrouped);
 424                 } else {
 425                     cc->selection->set(item_ungrouped);
 426                 }
 427                 ret = TRUE;
 428
 429             }
 430             break;
 431         case GDK_ENTER_NOTIFY:
 432         {
 433             if (cc_item_is_shape(item)) {
 434                 // This is a shape, so show connection point(s).
 435                 if (!(cc->active_shape) ||
 436                         // Don't show handle for another handle.
 437                         (item != ((SPItem *) cc->connpthandle))) {
 438                     cc_set_active_shape(cc, item);
 439                 }
 440             }
 441             ret = TRUE;
 442             break;
 443         }
 444         default:
 445             break;
 446     }
 447
 448     return ret;
 449 }
 450
 451
 452 gint
 453 sp_connector_context_root_handler(SPEventContext *ec, GdkEvent *event)
 454 {
 455     SPConnectorContext *const cc = SP_CONNECTOR_CONTEXT(ec);
 456
 457     gint ret = FALSE;
 458
 459     switch (event->type) {
 460         case GDK_BUTTON_PRESS:
 461             ret = connector_handle_button_press(cc, event->button);
 462             break;
 463
 464         case GDK_MOTION_NOTIFY:
 465                 ret = connector_handle_motion_notify(cc, event->motion);
 466             break;
 467
 468         case GDK_BUTTON_RELEASE:
 469             ret = connector_handle_button_release(cc, event->button);
 470             break;
 471         case GDK_KEY_PRESS:
 472             ret = connector_handle_key_press(cc, get_group0_keyval (&event->key));
 473             break;
 474
 475         default:
 476             break;
 477     }
 478
 479     if (!ret) {
 480         gint (*const parent_root_handler)(SPEventContext *, GdkEvent *)
 481             = ((SPEventContextClass *) parent_class)->root_handler;
 482         if (parent_root_handler) {
 483             ret = parent_root_handler(ec, event);
 484         }
 485     }
 486
 487     return ret;
 488 }
 489
 490
 491 static gint
 492 connector_handle_button_press(SPConnectorContext *const cc, GdkEventButton const &bevent)
 493 {
 494     Geom::Point const event_w(bevent.x, bevent.y);
 495     /* Find desktop coordinates */
 496     Geom::Point p = cc->desktop->w2d(event_w);
 497     SPEventContext *event_context = SP_EVENT_CONTEXT(cc);
 498
 499     gint ret = FALSE;
 500     if ( bevent.button == 1 && !event_context->space_panning ) {
 501
 502         SPDesktop *desktop = SP_EVENT_CONTEXT_DESKTOP(cc);
 503
 504         if (Inkscape::have_viable_layer(desktop, cc->_message_context) == false) {
 505             return TRUE;
 506         }
 507
 508         Geom::Point const event_w(bevent.x,
 509                                 bevent.y);
 510         connector_drag_origin_w = event_w;
 511         connector_within_tolerance = true;
 512
 513         Geom::Point const event_dt = cc->desktop->w2d(event_w);
 514
 515         SnapManager &m = cc->desktop->namedview->snap_manager;
 516                 m.setup(cc->desktop);
 517
 518         switch (cc->state) {
 519             case SP_CONNECTOR_CONTEXT_STOP:
 520                 /* This is allowed, if we just cancelled curve */
 521             case SP_CONNECTOR_CONTEXT_IDLE:
 522             {
 523                 if ( cc->npoints == 0 ) {
 524                     cc_clear_active_conn(cc);
 525
 526                     SP_EVENT_CONTEXT_DESKTOP(cc)->messageStack()->flash(Inkscape::NORMAL_MESSAGE, _("Creating new connector"));
 527
 528                     /* Set start anchor */
 529                     /* Create green anchor */
 530                     Geom::Point p = event_dt;
 531
 532                     // Test whether we clicked on a connection point
 533                     cc->sid = conn_pt_handle_test(cc, p);
 534
 535                     if (!cc->sid) {
 536                         // This is the first point, so just snap it to the grid
 537                         // as there's no other points to go off.
 538                         m.freeSnapReturnByRef(Inkscape::SnapPreferences::SNAPPOINT_NODE, p, Inkscape::SNAPSOURCE_HANDLE);
 539                     }
 540                     spcc_connector_set_initial_point(cc, p);
 541
 542                 }
 543                 cc->state = SP_CONNECTOR_CONTEXT_DRAGGING;
 544                 ret = TRUE;
 545                 break;
 546             }
 547             case SP_CONNECTOR_CONTEXT_DRAGGING:
 548             {
 549                 // This is the second click of a connector creation.
 550                 m.freeSnapReturnByRef(Inkscape::SnapPreferences::SNAPPOINT_NODE, p, Inkscape::SNAPSOURCE_HANDLE);
 551
 552                 spcc_connector_set_subsequent_point(cc, p);
 553                 spcc_connector_finish_segment(cc, p);
 554                 // Test whether we clicked on a connection point
 555                 cc->eid = conn_pt_handle_test(cc, p);
 556                 if (cc->npoints != 0) {
 557                     spcc_connector_finish(cc);
 558                 }
 559                 cc_set_active_conn(cc, cc->newconn);
 560                 cc->state = SP_CONNECTOR_CONTEXT_IDLE;
 561                 sp_event_context_discard_delayed_snap_event(event_context);
 562                 ret = TRUE;
 563                 break;
 564             }
 565             case SP_CONNECTOR_CONTEXT_CLOSE:
 566             {
 567                 g_warning("Button down in CLOSE state");
 568                 break;
 569             }
 570             default:
 571                 break;
 572         }
 573     } else if (bevent.button == 3) {
 574         if (cc->state == SP_CONNECTOR_CONTEXT_REROUTING) {
 575             // A context menu is going to be triggered here,
 576             // so end the rerouting operation.
 577             cc_connector_rerouting_finish(cc, &p);
 578
 579             cc->state = SP_CONNECTOR_CONTEXT_IDLE;
 580             sp_event_context_discard_delayed_snap_event(event_context);
 581
 582             // Don't set ret to TRUE, so we drop through to the
 583             // parent handler which will open the context menu.
 584         }
 585         else if (cc->npoints != 0) {
 586             spcc_connector_finish(cc);
 587             cc->state = SP_CONNECTOR_CONTEXT_IDLE;
 588             sp_event_context_discard_delayed_snap_event(event_context);
 589             ret = TRUE;
 590         }
 591     }
 592     return ret;
 593 }
 594
 595
 596 static gint
 597 connector_handle_motion_notify(SPConnectorContext *const cc, GdkEventMotion const &mevent)
 598 {
 599     gint ret = FALSE;
 600     SPEventContext *event_context = SP_EVENT_CONTEXT(cc);
 601     Inkscape::Preferences *prefs = Inkscape::Preferences::get();
 602
 603     if (event_context->space_panning || mevent.state & GDK_BUTTON2_MASK || mevent.state & GDK_BUTTON3_MASK) {
 604         // allow middle-button scrolling
 605         return FALSE;
 606     }
 607
 608     Geom::Point const event_w(mevent.x, mevent.y);
 609
 610     if (connector_within_tolerance) {
 611         gint const tolerance = prefs->getIntLimited("/options/dragtolerance/value", 0, 0, 100);
 612         if ( Geom::LInfty( event_w - connector_drag_origin_w ) < tolerance ) {
 613             return FALSE;   // Do not drag if we're within tolerance from origin.
 614         }
 615     }
 616     // Once the user has moved farther than tolerance from the original location
 617     // (indicating they intend to move the object, not click), then always process
 618     // the motion notify coordinates as given (no snapping back to origin)
 619     connector_within_tolerance = false;
 620
 621     SPDesktop *const dt = cc->desktop;
 622
 623     /* Find desktop coordinates */
 624     Geom::Point p = dt->w2d(event_w);
 625
 626     SnapManager &m = dt->namedview->snap_manager;
 627         m.setup(dt);
 628
 629     switch (cc->state) {
 630         case SP_CONNECTOR_CONTEXT_DRAGGING:
 631         {
 632             // This is movement during a connector creation.
 633                 if ( cc->npoints > 0 ) {
 634                         m.freeSnapReturnByRef(Inkscape::SnapPreferences::SNAPPOINT_NODE, p, Inkscape::SNAPSOURCE_HANDLE);
 635                         cc->selection->clear();
 636                 spcc_connector_set_subsequent_point(cc, p);
 637                 ret = TRUE;
 638             }
 639             break;
 640         }
 641         case SP_CONNECTOR_CONTEXT_REROUTING:
 642         {
 643             g_assert( SP_IS_PATH(cc->clickeditem));
 644
 645             m.freeSnapReturnByRef(Inkscape::SnapPreferences::SNAPPOINT_NODE, p, Inkscape::SNAPSOURCE_HANDLE);
 646
 647             // Update the hidden path
 648             Geom::Matrix i2d = sp_item_i2d_affine(cc->clickeditem);
 649             Geom::Matrix d2i = i2d.inverse();
 650             SPPath *path = SP_PATH(cc->clickeditem);
 651             SPCurve *curve = (SP_SHAPE(path))->curve;
 652             if (cc->clickedhandle == cc->endpt_handle[0]) {
 653                 Geom::Point o = cc->endpt_handle[1]->pos;
 654                 curve->stretch_endpoints(p * d2i, o * d2i);
 655             }
 656             else {
 657                 Geom::Point o = cc->endpt_handle[0]->pos;
 658                 curve->stretch_endpoints(o * d2i, p * d2i);
 659             }
 660             sp_conn_adjust_path(path);
 661
 662             // Copy this to the temporary visible path
 663             cc->red_curve = SP_SHAPE(path)->curve->copy();
 664             cc->red_curve->transform(i2d);
 665
 666             sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(cc->red_bpath), cc->red_curve);
 667             ret = TRUE;
 668             break;
 669         }
 670         case SP_CONNECTOR_CONTEXT_STOP:
 671             /* This is perfectly valid */
 672             break;
 673         default:
 674             break;
 675     }
 676
 677     return ret;
 678 }
 679
 680
 681 static gint
 682 connector_handle_button_release(SPConnectorContext *const cc, GdkEventButton const &revent)
 683 {
 684     gint ret = FALSE;
 685     SPEventContext *event_context = SP_EVENT_CONTEXT(cc);
 686     if ( revent.button == 1 && !event_context->space_panning ) {
 687
 688         SPDesktop *desktop = SP_EVENT_CONTEXT_DESKTOP(cc);
 689         SPDocument *doc = sp_desktop_document(desktop);
 690
 691         SnapManager &m = desktop->namedview->snap_manager;
 692                 m.setup(desktop);
 693
 694         Geom::Point const event_w(revent.x, revent.y);
 695
 696         /* Find desktop coordinates */
 697         Geom::Point p = cc->desktop->w2d(event_w);
 698
 699         switch (cc->state) {
 700             //case SP_CONNECTOR_CONTEXT_POINT:
 701             case SP_CONNECTOR_CONTEXT_DRAGGING:
 702             {
 703                 m.freeSnapReturnByRef(Inkscape::SnapPreferences::SNAPPOINT_NODE, p, Inkscape::SNAPSOURCE_HANDLE);
 704
 705                 if (connector_within_tolerance)
 706                 {
 707                     spcc_connector_finish_segment(cc, p);
 708                     return TRUE;
 709                 }
 710                 // Connector has been created via a drag, end it now.
 711                 spcc_connector_set_subsequent_point(cc, p);
 712                 spcc_connector_finish_segment(cc, p);
 713                 // Test whether we clicked on a connection point
 714                 cc->eid = conn_pt_handle_test(cc, p);
 715                 if (cc->npoints != 0) {
 716                     spcc_connector_finish(cc);
 717                 }
 718                 cc_set_active_conn(cc, cc->newconn);
 719                 cc->state = SP_CONNECTOR_CONTEXT_IDLE;
 720                 sp_event_context_discard_delayed_snap_event(event_context);
 721                 break;
 722             }
 723             case SP_CONNECTOR_CONTEXT_REROUTING:
 724             {
 725                 m.freeSnapReturnByRef(Inkscape::SnapPreferences::SNAPPOINT_NODE, p, Inkscape::SNAPSOURCE_HANDLE);
 726                 cc_connector_rerouting_finish(cc, &p);
 727
 728                 sp_document_ensure_up_to_date(doc);
 729                 cc->state = SP_CONNECTOR_CONTEXT_IDLE;
 730                 sp_event_context_discard_delayed_snap_event(event_context);
 731                 return TRUE;
 732                 break;
 733             }
 734             case SP_CONNECTOR_CONTEXT_STOP:
 735                 /* This is allowed, if we just cancelled curve */
 736                 break;
 737             default:
 738                 break;
 739         }
 740         ret = TRUE;
 741     }
 742
 743     return ret;
 744 }
 745
 746
 747 static gint
 748 connector_handle_key_press(SPConnectorContext *const cc, guint const keyval)
 749 {
 750     gint ret = FALSE;
 751     /* fixme: */
 752     switch (keyval) {
 753         case GDK_Return:
 754         case GDK_KP_Enter:
 755             if (cc->npoints != 0) {
 756                 spcc_connector_finish(cc);
 757                 cc->state = SP_CONNECTOR_CONTEXT_IDLE;
 758                 sp_event_context_discard_delayed_snap_event(SP_EVENT_CONTEXT(cc));
 759                 ret = TRUE;
 760             }
 761             break;
 762         case GDK_Escape:
 763             if (cc->state == SP_CONNECTOR_CONTEXT_REROUTING) {
 764
 765                 SPDesktop *desktop = SP_EVENT_CONTEXT_DESKTOP(cc);
 766                 SPDocument *doc = sp_desktop_document(desktop);
 767
 768                 cc_connector_rerouting_finish(cc, NULL);
 769
 770                 sp_document_undo(doc);
 771
 772                 cc->state = SP_CONNECTOR_CONTEXT_IDLE;
 773                 sp_event_context_discard_delayed_snap_event(SP_EVENT_CONTEXT(cc));
 774                 desktop->messageStack()->flash( Inkscape::NORMAL_MESSAGE,
 775                         _("Connector endpoint drag cancelled."));
 776                 ret = TRUE;
 777             }
 778             else if (cc->npoints != 0) {
 779                 // if drawing, cancel, otherwise pass it up for deselecting
 780                 cc->state = SP_CONNECTOR_CONTEXT_STOP;
 781                 sp_event_context_discard_delayed_snap_event(SP_EVENT_CONTEXT(cc));
 782                 spcc_reset_colors(cc);
 783                 ret = TRUE;
 784             }
 785             break;
 786         default:
 787             break;
 788     }
 789     return ret;
 790 }
 791
 792
 793 static void
 794 cc_connector_rerouting_finish(SPConnectorContext *const cc, Geom::Point *const p)
 795 {
 796     SPDesktop *desktop = SP_EVENT_CONTEXT_DESKTOP(cc);
 797     SPDocument *doc = sp_desktop_document(desktop);
 798
 799     // Clear the temporary path:
 800     cc->red_curve->reset();
 801     sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(cc->red_bpath), NULL);
 802
 803     if (p != NULL)
 804     {
 805         // Test whether we clicked on a connection point
 806         gchar *shape_label = conn_pt_handle_test(cc, *p);
 807
 808         if (shape_label) {
 809             if (cc->clickedhandle == cc->endpt_handle[0]) {
 810                 sp_object_setAttribute(cc->clickeditem,
 811                         "inkscape:connection-start",shape_label, false);
 812             }
 813             else {
 814                 sp_object_setAttribute(cc->clickeditem,
 815                         "inkscape:connection-end",shape_label, false);
 816             }
 817             g_free(shape_label);
 818         }
 819     }
 820     cc->clickeditem->setHidden(false);
 821     sp_conn_adjust_path(SP_PATH(cc->clickeditem));
 822     cc->clickeditem->updateRepr();
 823     sp_document_done(doc, SP_VERB_CONTEXT_CONNECTOR,
 824                      _("Reroute connector"));
 825     cc_set_active_conn(cc, cc->clickeditem);
 826 }
 827
 828
 829 static void
 830 spcc_reset_colors(SPConnectorContext *cc)
 831 {
 832     /* Red */
 833     cc->red_curve->reset();
 834     sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(cc->red_bpath), NULL);
 835
 836     cc->green_curve->reset();
 837     cc->npoints = 0;
 838 }
 839
 840
 841 static void
 842 spcc_connector_set_initial_point(SPConnectorContext *const cc, Geom::Point const p)
 843 {
 844     g_assert( cc->npoints == 0 );
 845
 846     cc->p[0] = p;
 847     cc->p[1] = p;
 848     cc->npoints = 2;
 849     sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(cc->red_bpath), NULL);
 850 }
 851
 852
 853 static void
 854 spcc_connector_set_subsequent_point(SPConnectorContext *const cc, Geom::Point const p)
 855 {
 856     g_assert( cc->npoints != 0 );
 857
 858     SPDesktop *dt = cc->desktop;
 859     Geom::Point o = dt->dt2doc(cc->p[0]);
 860     Geom::Point d = dt->dt2doc(p);
 861     Avoid::Point src(o[Geom::X], o[Geom::Y]);
 862     Avoid::Point dst(d[Geom::X], d[Geom::Y]);
 863
 864     if (!cc->newConnRef) {
 865         Avoid::Router *router = sp_desktop_document(dt)->router;
 866         cc->newConnRef = new Avoid::ConnRef(router, 0, src, dst);
 867         cc->newConnRef->updateEndPoint(Avoid::VertID::src, src);
 868     }
 869     cc->newConnRef->updateEndPoint(Avoid::VertID::tar, dst);
 870
 871     cc->newConnRef->makePathInvalid();
 872     cc->newConnRef->generatePath(src, dst);
 873
 874     Avoid::PolyLine route = cc->newConnRef->route();
 875     cc->newConnRef->calcRouteDist();
 876
 877     cc->red_curve->reset();
 878     Geom::Point pt(route.ps[0].x, route.ps[0].y);
 879     cc->red_curve->moveto(pt);
 880
 881     for (int i = 1; i < route.pn; ++i) {
 882         Geom::Point p(route.ps[i].x, route.ps[i].y);
 883         cc->red_curve->lineto(p);
 884     }
 885     cc->red_curve->transform(dt->doc2dt());
 886     sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(cc->red_bpath), cc->red_curve);
 887 }
 888
 889
 890 /**
 891  * Concats red, blue and green.
 892  * If any anchors are defined, process these, optionally removing curves from white list
 893  * Invoke _flush_white to write result back to object.
 894  */
 895 static void
 896 spcc_concat_colors_and_flush(SPConnectorContext *cc)
 897 {
 898     SPCurve *c = cc->green_curve;
 899     cc->green_curve = new SPCurve();
 900
 901     cc->red_curve->reset();
 902     sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(cc->red_bpath), NULL);
 903
 904     if (c->is_empty()) {
 905         c->unref();
 906         return;
 907     }
 908
 909     spcc_flush_white(cc, c);
 910
 911     c->unref();
 912 }
 913
 914
 915 /*
 916  * Flushes white curve(s) and additional curve into object
 917  *
 918  * No cleaning of colored curves - this has to be done by caller
 919  * No rereading of white data, so if you cannot rely on ::modified, do it in caller
 920  *
 921  */
 922
 923 static void
 924 spcc_flush_white(SPConnectorContext *cc, SPCurve *gc)
 925 {
 926     SPCurve *c;
 927
 928     if (gc) {
 929         c = gc;
 930         c->ref();
 931     } else {
 932         return;
 933     }
 934
 935     /* Now we have to go back to item coordinates at last */
 936     c->transform(SP_EVENT_CONTEXT_DESKTOP(cc)->dt2doc());
 937
 938     SPDesktop *desktop = SP_EVENT_CONTEXT_DESKTOP(cc);
 939     SPDocument *doc = sp_desktop_document(desktop);
 940     Inkscape::XML::Document *xml_doc = sp_document_repr_doc(doc);
 941
 942     if ( c && !c->is_empty() ) {
 943         /* We actually have something to write */
 944
 945         Inkscape::XML::Node *repr = xml_doc->createElement("svg:path");
 946         /* Set style */
 947         sp_desktop_apply_style_tool(desktop, repr, "/tools/connector", false);
 948
 949         gchar *str = sp_svg_write_path( c->get_pathvector() );
 950         g_assert( str != NULL );
 951         repr->setAttribute("d", str);
 952         g_free(str);
 953
 954         /* Attach repr */
 955         cc->newconn = SP_ITEM(desktop->currentLayer()->appendChildRepr(repr));
 956         cc->selection->set(repr);
 957         Inkscape::GC::release(repr);
 958         cc->newconn->transform = sp_item_i2doc_affine(SP_ITEM(desktop->currentLayer())).inverse();
 959         cc->newconn->updateRepr();
 960
 961         bool connection = false;
 962         sp_object_setAttribute(cc->newconn, "inkscape:connector-type",
 963                 "polyline", false);
 964         if (cc->sid)
 965         {
 966             sp_object_setAttribute(cc->newconn, "inkscape:connection-start",
 967                     cc->sid, false);
 968             connection = true;
 969         }
 970
 971         if (cc->eid)
 972         {
 973             sp_object_setAttribute(cc->newconn, "inkscape:connection-end",
 974                     cc->eid, false);
 975             connection = true;
 976         }
 977         cc->newconn->updateRepr();
 978         if (connection) {
 979             // Adjust endpoints to shape edge.
 980             sp_conn_adjust_path(SP_PATH(cc->newconn));
 981         }
 982         cc->newconn->updateRepr();
 983     }
 984
 985     c->unref();
 986
 987     /* Flush pending updates */
 988     sp_document_done(doc, SP_VERB_CONTEXT_CONNECTOR, _("Create connector"));
 989     sp_document_ensure_up_to_date(doc);
 990 }
 991
 992
 993 static void
 994 spcc_connector_finish_segment(SPConnectorContext *const cc, Geom::Point const /*p*/)
 995 {
 996     if (!cc->red_curve->is_empty()) {
 997         cc->green_curve->append_continuous(cc->red_curve, 0.0625);
 998
 999         cc->p[0] = cc->p[3];
1000         cc->p[1] = cc->p[4];
1001         cc->npoints = 2;
1002
1003         cc->red_curve->reset();
1004     }
1005 }
1006
1007
1008 static void
1009 spcc_connector_finish(SPConnectorContext *const cc)
1010 {
1011     SPDesktop *const desktop = cc->desktop;
1012     desktop->messageStack()->flash(Inkscape::NORMAL_MESSAGE, _("Finishing connector"));
1013
1014     cc->red_curve->reset();
1015     spcc_concat_colors_and_flush(cc);
1016
1017     cc->npoints = 0;
1018
1019     if (cc->newConnRef) {
1020         cc->newConnRef->removeFromGraph();
1021         delete cc->newConnRef;
1022         cc->newConnRef = NULL;
1023     }
1024 }
1025
1026
1027 static gboolean
1028 cc_generic_knot_handler(SPCanvasItem *, GdkEvent *event, SPKnot *knot)
1029 {
1030     g_assert (knot != NULL);
1031
1032     g_object_ref(knot);
1033
1034     SPConnectorContext *cc = SP_CONNECTOR_CONTEXT(
1035             knot->desktop->event_context);
1036
1037     gboolean consumed = FALSE;
1038
1039     switch (event->type) {
1040         case GDK_ENTER_NOTIFY:
1041             sp_knot_set_flag(knot, SP_KNOT_MOUSEOVER, TRUE);
1042
1043             cc->active_handle = knot;
1044
1045             if (knot->tip)
1046             {
1047                 knot->desktop->event_context->defaultMessageContext()->set(
1048                         Inkscape::NORMAL_MESSAGE, knot->tip);
1049             }
1050
1051             consumed = TRUE;
1052             break;
1053         case GDK_LEAVE_NOTIFY:
1054             sp_knot_set_flag(knot, SP_KNOT_MOUSEOVER, FALSE);
1055
1056             cc->active_handle = NULL;
1057
1058             if (knot->tip) {
1059                 knot->desktop->event_context->defaultMessageContext()->clear();
1060             }
1061
1062             consumed = TRUE;
1063             break;
1064         default:
1065             break;
1066     }
1067
1068     g_object_unref(knot);
1069
1070     return consumed;
1071 }
1072
1073
1074 static gboolean
1075 endpt_handler(SPKnot */*knot*/, GdkEvent *event, SPConnectorContext *cc)
1076 {
1077     g_assert( SP_IS_CONNECTOR_CONTEXT(cc) );
1078
1079     gboolean consumed = FALSE;
1080
1081     switch (event->type) {
1082         case GDK_BUTTON_PRESS:
1083             g_assert( (cc->active_handle == cc->endpt_handle[0]) ||
1084                       (cc->active_handle == cc->endpt_handle[1]) );
1085             if (cc->state == SP_CONNECTOR_CONTEXT_IDLE) {
1086                 cc->clickeditem = cc->active_conn;
1087                 cc->clickedhandle = cc->active_handle;
1088                 cc_clear_active_conn(cc);
1089                 cc->state = SP_CONNECTOR_CONTEXT_REROUTING;
1090
1091                 // Disconnect from attached shape
1092                 unsigned ind = (cc->active_handle == cc->endpt_handle[0]) ? 0 : 1;
1093                 sp_conn_end_detach(cc->clickeditem, ind);
1094
1095                 Geom::Point origin;
1096                 if (cc->clickedhandle == cc->endpt_handle[0]) {
1097                     origin = cc->endpt_handle[1]->pos;
1098                 }
1099                 else {
1100                     origin = cc->endpt_handle[0]->pos;
1101                 }
1102
1103                 // Show the red path for dragging.
1104                 cc->red_curve = SP_PATH(cc->clickeditem)->curve->copy();
1105                 Geom::Matrix i2d = sp_item_i2d_affine(cc->clickeditem);
1106                 cc->red_curve->transform(i2d);
1107                 sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(cc->red_bpath), cc->red_curve);
1108
1109                 cc->clickeditem->setHidden(true);
1110
1111                 // The rest of the interaction rerouting the connector is
1112                 // handled by the context root handler.
1113                 consumed = TRUE;
1114             }
1115             break;
1116         default:
1117             break;
1118     }
1119
1120     return consumed;
1121 }
1122
1123
1124 static void cc_set_active_shape(SPConnectorContext *cc, SPItem *item)
1125 {
1126     g_assert(item != NULL );
1127
1128     cc->active_shape = item;
1129
1130     // Remove existing active shape listeners
1131     if (cc->active_shape_repr) {
1132         sp_repr_remove_listener_by_data(cc->active_shape_repr, cc);
1133         Inkscape::GC::release(cc->active_shape_repr);
1134
1135         sp_repr_remove_listener_by_data(cc->active_shape_layer_repr, cc);
1136         Inkscape::GC::release(cc->active_shape_layer_repr);
1137     }
1138
1139     // Listen in case the active shape changes
1140     cc->active_shape_repr = SP_OBJECT_REPR(item);
1141     if (cc->active_shape_repr) {
1142         Inkscape::GC::anchor(cc->active_shape_repr);
1143         sp_repr_add_listener(cc->active_shape_repr, &shape_repr_events, cc);
1144
1145         cc->active_shape_layer_repr = cc->active_shape_repr->parent();
1146         Inkscape::GC::anchor(cc->active_shape_layer_repr);
1147         sp_repr_add_listener(cc->active_shape_layer_repr, &layer_repr_events, cc);
1148     }
1149
1150
1151     // Set center connection point.
1152     if ( cc->connpthandle == NULL ) {
1153         SPKnot *knot = sp_knot_new(cc->desktop,
1154                 _("<b>Connection point</b>: click or drag to create a new connector"));
1155
1156         knot->setShape(SP_KNOT_SHAPE_SQUARE);
1157         knot->setSize(8);
1158         knot->setAnchor(GTK_ANCHOR_CENTER);
1159         knot->setFill(0xffffff00, 0xff0000ff, 0xff0000ff);
1160         sp_knot_update_ctrl(knot);
1161
1162         // We don't want to use the standard knot handler,
1163         //since we don't want this knot to be draggable.
1164         g_signal_handler_disconnect(G_OBJECT(knot->item),
1165                 knot->_event_handler_id);
1166         knot->_event_handler_id = 0;
1167
1168         gtk_signal_connect(GTK_OBJECT(knot->item), "event",
1169                 GTK_SIGNAL_FUNC(cc_generic_knot_handler), knot);
1170
1171         cc->connpthandle = knot;
1172     }
1173
1174
1175     Geom::OptRect bbox = sp_item_bbox_desktop(cc->active_shape);
1176     if (bbox) {
1177         Geom::Point center = bbox->midpoint();
1178         sp_knot_set_position(cc->connpthandle, center, 0);
1179         sp_knot_show(cc->connpthandle);
1180     } else {
1181         sp_knot_hide(cc->connpthandle);
1182     }
1183 }
1184
1185
1186 static void
1187 cc_set_active_conn(SPConnectorContext *cc, SPItem *item)
1188 {
1189     g_assert( SP_IS_PATH(item) );
1190
1191     SPCurve *curve = SP_SHAPE(SP_PATH(item))->curve;
1192     Geom::Matrix i2d = sp_item_i2d_affine(item);
1193
1194     if (cc->active_conn == item)
1195     {
1196         // Just adjust handle positions.
1197         Geom::Point startpt = *(curve->first_point()) * i2d;
1198         sp_knot_set_position(cc->endpt_handle[0], startpt, 0);
1199
1200         Geom::Point endpt = *(curve->last_point()) * i2d;
1201         sp_knot_set_position(cc->endpt_handle[1], endpt, 0);
1202
1203         return;
1204     }
1205
1206     cc->active_conn = item;
1207
1208     // Remove existing active conn listeners
1209     if (cc->active_conn_repr) {
1210         sp_repr_remove_listener_by_data(cc->active_conn_repr, cc);
1211         Inkscape::GC::release(cc->active_conn_repr);
1212         cc->active_conn_repr = NULL;
1213     }
1214
1215     // Listen in case the active conn changes
1216     cc->active_conn_repr = SP_OBJECT_REPR(item);
1217     if (cc->active_conn_repr) {
1218         Inkscape::GC::anchor(cc->active_conn_repr);
1219         sp_repr_add_listener(cc->active_conn_repr, &shape_repr_events, cc);
1220     }
1221
1222     for (int i = 0; i < 2; ++i) {
1223
1224         // Create the handle if it doesn't exist
1225         if ( cc->endpt_handle[i] == NULL ) {
1226             SPKnot *knot = sp_knot_new(cc->desktop,
1227                     _("<b>Connector endpoint</b>: drag to reroute or connect to new shapes"));
1228
1229             knot->setShape(SP_KNOT_SHAPE_SQUARE);
1230             knot->setSize(7);
1231             knot->setAnchor(GTK_ANCHOR_CENTER);
1232             knot->setFill(0xffffff00, 0xff0000ff, 0xff0000ff);
1233             knot->setStroke(0x000000ff, 0x000000ff, 0x000000ff);
1234             sp_knot_update_ctrl(knot);
1235
1236             // We don't want to use the standard knot handler,
1237             //since we don't want this knot to be draggable.
1238             g_signal_handler_disconnect(G_OBJECT(knot->item),
1239                     knot->_event_handler_id);
1240             knot->_event_handler_id = 0;
1241
1242             gtk_signal_connect(GTK_OBJECT(knot->item), "event",
1243                     GTK_SIGNAL_FUNC(cc_generic_knot_handler), knot);
1244
1245             cc->endpt_handle[i] = knot;
1246         }
1247
1248         // Remove any existing handlers
1249         if (cc->endpt_handler_id[i]) {
1250             g_signal_handlers_disconnect_by_func(
1251                     G_OBJECT(cc->endpt_handle[i]->item),
1252                     (void*)G_CALLBACK(endpt_handler), (gpointer) cc );
1253             cc->endpt_handler_id[i] = 0;
1254         }
1255
1256         // Setup handlers for connector endpoints, this is
1257         // is as 'after' so that cc_generic_knot_handler is
1258         // triggered first for any endpoint.
1259         cc->endpt_handler_id[i] = g_signal_connect_after(
1260                 G_OBJECT(cc->endpt_handle[i]->item), "event",
1261                 G_CALLBACK(endpt_handler), cc);
1262     }
1263
1264     Geom::Point startpt = *(curve->first_point()) * i2d;
1265     sp_knot_set_position(cc->endpt_handle[0], startpt, 0);
1266
1267     Geom::Point endpt = *(curve->last_point()) * i2d;
1268     sp_knot_set_position(cc->endpt_handle[1], endpt, 0);
1269
1270     sp_knot_show(cc->endpt_handle[0]);
1271     sp_knot_show(cc->endpt_handle[1]);
1272 }
1273
1274
1275 static bool cc_item_is_shape(SPItem *item)
1276 {
1277     if (SP_IS_PATH(item)) {
1278         SPCurve *curve = (SP_SHAPE(item))->curve;
1279         if ( curve && !(curve->is_closed()) ) {
1280             // Open paths are connectors.
1281             return false;
1282         }
1283     }
1284     else if (SP_IS_TEXT(item) || SP_IS_FLOWTEXT(item)) {
1285         Inkscape::Preferences *prefs = Inkscape::Preferences::get();
1286         if (prefs->getBool("/tools/connector/ignoretext", true)) {
1287             // Don't count text as a shape we can connect connector to.
1288             return false;
1289         }
1290     }
1291     return true;
1292 }
1293
1294
1295 bool cc_item_is_connector(SPItem *item)
1296 {
1297     if (SP_IS_PATH(item)) {
1298         if (SP_PATH(item)->connEndPair.isAutoRoutingConn()) {
1299             g_assert( !(SP_SHAPE(item)->curve->is_closed()) );
1300             return true;
1301         }
1302     }
1303     return false;
1304 }
1305
1306
1307 void cc_selection_set_avoid(bool const set_avoid)
1308 {
1309     SPDesktop *desktop = inkscape_active_desktop();
1310     if (desktop == NULL) {
1311         return;
1312     }
1313
1314     SPDocument *document = sp_desktop_document(desktop);
1315
1316     Inkscape::Selection *selection = sp_desktop_selection(desktop);
1317
1318     GSList *l = (GSList *) selection->itemList();
1319
1320     int changes = 0;
1321
1322     while (l) {
1323         SPItem *item = (SPItem *) l->data;
1324
1325         char const *value = (set_avoid) ? "true" : NULL;
1326
1327         if (cc_item_is_shape(item)) {
1328             sp_object_setAttribute(item, "inkscape:connector-avoid",
1329                     value, false);
1330             item->avoidRef->handleSettingChange();
1331             changes++;
1332         }
1333
1334         l = l->next;
1335     }
1336
1337     if (changes == 0) {
1338         desktop->messageStack()->flash(Inkscape::WARNING_MESSAGE,
1339                 _("Select <b>at least one non-connector object</b>."));
1340         return;
1341     }
1342
1343     char *event_desc = (set_avoid) ?
1344             _("Make connectors avoid selected objects") :
1345             _("Make connectors ignore selected objects");
1346     sp_document_done(document, SP_VERB_CONTEXT_CONNECTOR, event_desc);
1347 }
1348
1349
1350 static void
1351 cc_selection_changed(Inkscape::Selection *selection, gpointer data)
1352 {
1353     SPConnectorContext *cc = SP_CONNECTOR_CONTEXT(data);
1354     //SPEventContext *ec = SP_EVENT_CONTEXT(cc);
1355
1356     SPItem *item = selection->singleItem();
1357
1358     if (cc->active_conn == item)
1359     {
1360         // Nothing to change.
1361         return;
1362     }
1363     if (item == NULL)
1364     {
1365         cc_clear_active_conn(cc);
1366         return;
1367     }
1368
1369     if (cc_item_is_connector(item)) {
1370         cc_set_active_conn(cc, item);
1371     }
1372 }
1373
1374
1375 static void
1376 shape_event_attr_deleted(Inkscape::XML::Node */*repr*/, Inkscape::XML::Node *child,
1377                          Inkscape::XML::Node */*ref*/, gpointer data)
1378 {
1379     g_assert(data);
1380     SPConnectorContext *cc = SP_CONNECTOR_CONTEXT(data);
1381
1382     if (child == cc->active_shape_repr) {
1383         // The active shape has been deleted.  Clear active shape.
1384         cc_clear_active_shape(cc);
1385     }
1386 }
1387
1388
1389 static void
1390 shape_event_attr_changed(Inkscape::XML::Node *repr, gchar const *name,
1391                          gchar const */*old_value*/, gchar const */*new_value*/,
1392                          bool /*is_interactive*/, gpointer data)
1393 {
1394     g_assert(data);
1395     SPConnectorContext *cc = SP_CONNECTOR_CONTEXT(data);
1396
1397     // Look for changes than result in onscreen movement.
1398     if (!strcmp(name, "d") || !strcmp(name, "x") || !strcmp(name, "y") ||
1399             !strcmp(name, "width") || !strcmp(name, "height") ||
1400             !strcmp(name, "transform"))
1401     {
1402         if (repr == cc->active_shape_repr) {
1403             // Active shape has moved. Clear active shape.
1404             cc_clear_active_shape(cc);
1405         }
1406         else if (repr == cc->active_conn_repr) {
1407             // The active conn has been moved.
1408             // Set it again, which just sets new handle positions.
1409             cc_set_active_conn(cc, cc->active_conn);
1410         }
1411     }
1412 }
1413
1414
1415 /*
1416   Local Variables:
1417   mode:c++
1418   c-file-style:"stroustrup"
1419   c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
1420   indent-tabs-mode:nil
1421   fill-column:99
1422   End:
1423 */
1424 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :