gtk2_ardour/editor_route_list.cc

   1 /*
   2     Copyright (C) 2000 Paul Davis
   3
   4     This program is free software; you can redistribute it and/or modify
   5     it under the terms of the GNU General Public License as published by
   6     the Free Software Foundation; either version 2 of the License, or
   7     (at your option) any later version.
   8
   9     This program is distributed in the hope that it will be useful,
  10     but WITHOUT ANY WARRANTY; without even the implied warranty of
  11     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12     GNU General Public License for more details.
  13
  14     You should have received a copy of the GNU General Public License
  15     along with this program; if not, write to the Free Software
  16     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  17
  18 */
  19
  20 #include <list>
  21 #include <vector>
  22 #include <algorithm>
  23 #include <cstdlib>
  24 #include <cmath>
  25 #include <cassert>
  26
  27 #include "editor.h"
  28 #include "keyboard.h"
  29 #include "ardour_ui.h"
  30 #include "audio_time_axis.h"
  31 #include "midi_time_axis.h"
  32 #include "mixer_strip.h"
  33 #include "gui_thread.h"
  34 #include "actions.h"
  35
  36 #include <pbd/unknown_type.h>
  37
  38 #include <ardour/route.h>
  39
  40 #include "i18n.h"
  41
  42 using namespace sigc;
  43 using namespace ARDOUR;
  44 using namespace PBD;
  45 using namespace Gtk;
  46 using namespace Glib;
  47
  48 const char* _order_key = N_("editor");
  49
  50 void
  51 Editor::handle_new_route (Session::RouteList& routes)
  52 {
  53         ENSURE_GUI_THREAD(bind (mem_fun(*this, &Editor::handle_new_route), routes));
  54
  55         TimeAxisView *tv;
  56         RouteTimeAxisView *rtv;
  57         TreeModel::Row parent;
  58         TreeModel::Row row;
  59
  60         route_redisplay_does_not_sync_order_keys = true;
  61         no_route_list_redisplay = true;
  62
  63         for (Session::RouteList::iterator x = routes.begin(); x != routes.end(); ++x) {
  64                 boost::shared_ptr<Route> route = (*x);
  65
  66                 if (route->is_hidden()) {
  67                         continue;
  68                 }
  69
  70                 if (route->default_type() == ARDOUR::DataType::AUDIO)
  71                         tv = new AudioTimeAxisView (*this, *session, route, *track_canvas);
  72                 else if (route->default_type() == ARDOUR::DataType::MIDI)
  73                         tv = new MidiTimeAxisView (*this, *session, route, *track_canvas);
  74                 else
  75                         throw unknown_type();
  76
  77                 //cerr << "Editor::handle_new_route() called on " << route->name() << endl;//DEBUG
  78 #if 0
  79                 if (route_display_model->children().size() == 0) {
  80
  81                         /* set up basic entries */
  82
  83                         TreeModel::Row row;
  84
  85                         row = *(route_display_model->append());  // path = "0"
  86                         row[route_display_columns.text] = _("Busses");
  87                         row[route_display_columns.tv] = 0;
  88                         row = *(route_display_model->append());  // path = "1"
  89                         row[route_display_columns.text] = _("Tracks");
  90                         row[route_display_columns.tv] = 0;
  91
  92                 }
  93
  94                 if (dynamic_cast<AudioTrack*>(route.get()) != 0) {
  95                         TreeModel::iterator iter = route_display_model->get_iter ("1");  // audio tracks
  96                         parent = *iter;
  97                 } else {
  98                         TreeModel::iterator iter = route_display_model->get_iter ("0");  // busses
  99                         parent = *iter;
 100                 }
 101
 102
 103                 row = *(route_display_model->append (parent.children()));
 104 #else
 105                 row = *(route_display_model->append ());
 106 #endif
 107
 108                 // cerr << route->name() << " marked for display ? " << tv->marked_for_display() << endl;
 109
 110                 row[route_display_columns.text] = route->name();
 111                 row[route_display_columns.visible] = tv->marked_for_display();
 112                 row[route_display_columns.tv] = tv;
 113                 row[route_display_columns.route] = route;
 114
 115                 track_views.push_back (tv);
 116
 117                 ignore_route_list_reorder = true;
 118
 119                 if ((rtv = dynamic_cast<RouteTimeAxisView*> (tv)) != 0) {
 120                         /* added a new fresh one at the end */
 121                         if (rtv->route()->order_key(_order_key) == -1) {
 122                                 rtv->route()->set_order_key (_order_key, route_display_model->children().size()-1);
 123                         }
 124                         rtv->effective_gain_display ();
 125                 }
 126
 127                 ignore_route_list_reorder = false;
 128
 129                 route->gui_changed.connect (mem_fun(*this, &Editor::handle_gui_changes));
 130
 131                 tv->GoingAway.connect (bind (mem_fun(*this, &Editor::remove_route), tv));
 132         }
 133
 134         no_route_list_redisplay = false;
 135
 136         redisplay_route_list ();
 137
 138         if (show_editor_mixer_when_tracks_arrive) {
 139                 show_editor_mixer (true);
 140         }
 141
 142         editor_list_button.set_sensitive(true);
 143         route_redisplay_does_not_sync_order_keys = false;
 144 }
 145
 146 void
 147 Editor::handle_gui_changes (const string & what, void *src)
 148 {
 149         ENSURE_GUI_THREAD(bind (mem_fun(*this, &Editor::handle_gui_changes), what, src));
 150
 151         if (what == "track_height") {
 152                 /* Optional :make tracks change height while it happens, instead
 153                    of on first-idle
 154                 */
 155                 //track_canvas->update_now ();
 156                 redisplay_route_list ();
 157         }
 158
 159         if (what == "visible_tracks") {
 160                 redisplay_route_list ();
 161         }
 162 }
 163
 164 void
 165 Editor::remove_route (TimeAxisView *tv)
 166 {
 167         ENSURE_GUI_THREAD(bind (mem_fun(*this, &Editor::remove_route), tv));
 168
 169         TrackViewList::iterator i;
 170         TreeModel::Children rows = route_display_model->children();
 171         TreeModel::Children::iterator ri;
 172
 173         if (tv == entered_track) {
 174                 entered_track = 0;
 175         }
 176
 177         /* the core model has changed, there is no need to sync
 178            view orders.
 179         */
 180
 181         route_redisplay_does_not_sync_order_keys = true;
 182
 183         for (ri = rows.begin(); ri != rows.end(); ++ri) {
 184                 if ((*ri)[route_display_columns.tv] == tv) {
 185                         route_display_model->erase (ri);
 186                         break;
 187                 }
 188         }
 189
 190         route_redisplay_does_not_sync_order_keys = false;
 191
 192         if ((i = find (track_views.begin(), track_views.end(), tv)) != track_views.end()) {
 193                 track_views.erase (i);
 194         }
 195
 196         /* since the editor mixer goes away when you remove a route, set the
 197          * button to inactive and untick the menu option
 198          */
 199
 200         ActionManager::uncheck_toggleaction ("<Actions>/Editor/show-editor-mixer");
 201 }
 202
 203 void
 204 Editor::route_name_changed (TimeAxisView *tv)
 205 {
 206         ENSURE_GUI_THREAD(bind (mem_fun(*this, &Editor::route_name_changed), tv));
 207
 208         TreeModel::Children rows = route_display_model->children();
 209         TreeModel::Children::iterator i;
 210
 211         for (i = rows.begin(); i != rows.end(); ++i) {
 212                 if ((*i)[route_display_columns.tv] == tv) {
 213                         (*i)[route_display_columns.text] = tv->name();
 214                         break;
 215                 }
 216         }
 217 }
 218
 219 void
 220 Editor::update_route_visibility ()
 221 {
 222         TreeModel::Children rows = route_display_model->children();
 223         TreeModel::Children::iterator i;
 224
 225         no_route_list_redisplay = true;
 226
 227         for (i = rows.begin(); i != rows.end(); ++i) {
 228                 TimeAxisView *tv = (*i)[route_display_columns.tv];
 229                 (*i)[route_display_columns.visible] = tv->marked_for_display ();
 230                 cerr << "marked " << tv->name() << " for display = " << tv->marked_for_display() << endl;
 231         }
 232
 233         no_route_list_redisplay = false;
 234         redisplay_route_list ();
 235 }
 236
 237 void
 238 Editor::hide_track_in_display (TimeAxisView& tv, bool temponly)
 239 {
 240         TreeModel::Children rows = route_display_model->children();
 241         TreeModel::Children::iterator i;
 242
 243         for (i = rows.begin(); i != rows.end(); ++i) {
 244                 if ((*i)[route_display_columns.tv] == &tv) {
 245                         (*i)[route_display_columns.visible] = false;
 246                         break;
 247                 }
 248         }
 249
 250         RouteTimeAxisView* rtv = dynamic_cast<RouteTimeAxisView*> (&tv);
 251
 252         if (rtv && current_mixer_strip && (rtv->route() == current_mixer_strip->route())) {
 253                 // this will hide the mixer strip
 254                 set_selected_mixer_strip (tv);
 255         }
 256 }
 257
 258 void
 259 Editor::show_track_in_display (TimeAxisView& tv)
 260 {
 261         TreeModel::Children rows = route_display_model->children();
 262         TreeModel::Children::iterator i;
 263
 264         for (i = rows.begin(); i != rows.end(); ++i) {
 265                 if ((*i)[route_display_columns.tv] == &tv) {
 266                         (*i)[route_display_columns.visible] = true;
 267                         break;
 268                 }
 269         }
 270 }
 271
 272 void
 273 Editor::route_list_reordered (const TreeModel::Path& path,const TreeModel::iterator& iter,int* what)
 274 {
 275         redisplay_route_list ();
 276 }
 277
 278
 279 void
 280 Editor::sync_order_keys (const char *src)
 281 {
 282         vector<int> neworder;
 283         TreeModel::Children rows = route_display_model->children();
 284         TreeModel::Children::iterator ri;
 285
 286         if ((strcmp (src, _order_key) == 0) || !session || (session->state_of_the_state() & Session::Loading) || rows.empty()) {
 287                 return;
 288         }
 289
 290         for (ri = rows.begin(); ri != rows.end(); ++ri) {
 291                 neworder.push_back (0);
 292         }
 293
 294         bool changed = false;
 295         int order;
 296
 297         for (order = 0, ri = rows.begin(); ri != rows.end(); ++ri, ++order) {
 298                 boost::shared_ptr<Route> route = (*ri)[route_display_columns.route];
 299
 300                 int old_key = order;
 301                 int new_key = route->order_key (_order_key);
 302
 303                 neworder[new_key] = old_key;
 304
 305                 if (new_key != old_key) {
 306                         changed = true;
 307                 }
 308         }
 309
 310         if (changed) {
 311                 route_redisplay_does_not_reset_order_keys = true;
 312                 route_display_model->reorder (neworder);
 313                 route_redisplay_does_not_reset_order_keys = false;
 314         }
 315 }
 316
 317 void
 318 Editor::redisplay_route_list ()
 319 {
 320         TreeModel::Children rows = route_display_model->children();
 321         TreeModel::Children::iterator i;
 322         uint32_t position;
 323         uint32_t order;
 324         int n;
 325
 326         if (no_route_list_redisplay) {
 327                 return;
 328         }
 329
 330         for (n = 0, order = 0, position = 0, i = rows.begin(); i != rows.end(); ++i) {
 331                 TimeAxisView *tv = (*i)[route_display_columns.tv];
 332                 boost::shared_ptr<Route> route = (*i)[route_display_columns.route];
 333
 334                 if (tv == 0) {
 335                         // just a "title" row
 336                         continue;
 337                 }
 338
 339                 if (!route_redisplay_does_not_reset_order_keys) {
 340
 341                         /* this reorder is caused by user action, so reassign sort order keys
 342                            to tracks.
 343                         */
 344
 345                         route->set_order_key (_order_key, order);
 346                 }
 347
 348                 bool visible = (*i)[route_display_columns.visible];
 349
 350                 if (visible) {
 351                         tv->set_marked_for_display (true);
 352                         position += tv->show_at (position, n, &edit_controls_vbox);
 353                         tv->clip_to_viewport ();
 354                 } else {
 355                         tv->set_marked_for_display (false);
 356                         tv->hide ();
 357                 }
 358
 359                 n++;
 360
 361         }
 362
 363         full_canvas_height = position + canvas_timebars_vsize;
 364         vertical_adjustment.set_upper (full_canvas_height);
 365         if ((vertical_adjustment.get_value() + canvas_height) > vertical_adjustment.get_upper()) {
 366                 /*
 367                    We're increasing the size of the canvas while the bottom is visible.
 368                    We scroll down to keep in step with the controls layout.
 369                 */
 370                 vertical_adjustment.set_value (full_canvas_height - canvas_height);
 371         }
 372
 373         if (!route_redisplay_does_not_reset_order_keys && !route_redisplay_does_not_sync_order_keys) {
 374                 session->sync_order_keys (_order_key);
 375         }
 376 }
 377
 378 void
 379 Editor::hide_all_tracks (bool with_select)
 380 {
 381         TreeModel::Children rows = route_display_model->children();
 382         TreeModel::Children::iterator i;
 383
 384         no_route_list_redisplay = true;
 385
 386         for (i = rows.begin(); i != rows.end(); ++i) {
 387
 388                 TreeModel::Row row = (*i);
 389                 TimeAxisView *tv = row[route_display_columns.tv];
 390
 391                 if (tv == 0) {
 392                         continue;
 393                 }
 394
 395                 row[route_display_columns.visible] = false;
 396         }
 397
 398         no_route_list_redisplay = false;
 399         redisplay_route_list ();
 400
 401         /* XXX this seems like a hack and half, but its not clear where to put this
 402            otherwise.
 403         */
 404
 405         //reset_scrolling_region ();
 406 }
 407
 408 void
 409 Editor::build_route_list_menu ()
 410 {
 411         using namespace Menu_Helpers;
 412         using namespace Gtk;
 413
 414         route_list_menu = new Menu;
 415
 416         MenuList& items = route_list_menu->items();
 417         route_list_menu->set_name ("ArdourContextMenu");
 418
 419         items.push_back (MenuElem (_("Show All"), mem_fun(*this, &Editor::show_all_routes)));
 420         items.push_back (MenuElem (_("Hide All"), mem_fun(*this, &Editor::hide_all_routes)));
 421         items.push_back (MenuElem (_("Show All Audio Tracks"), mem_fun(*this, &Editor::show_all_audiotracks)));
 422         items.push_back (MenuElem (_("Hide All Audio Tracks"), mem_fun(*this, &Editor::hide_all_audiotracks)));
 423         items.push_back (MenuElem (_("Show All Audio Busses"), mem_fun(*this, &Editor::show_all_audiobus)));
 424         items.push_back (MenuElem (_("Hide All Audio Busses"), mem_fun(*this, &Editor::hide_all_audiobus)));
 425
 426 }
 427
 428 void
 429 Editor::set_all_tracks_visibility (bool yn)
 430 {
 431         TreeModel::Children rows = route_display_model->children();
 432         TreeModel::Children::iterator i;
 433
 434         no_route_list_redisplay = true;
 435
 436         for (i = rows.begin(); i != rows.end(); ++i) {
 437
 438                 TreeModel::Row row = (*i);
 439                 TimeAxisView* tv = row[route_display_columns.tv];
 440
 441                 if (tv == 0) {
 442                         continue;
 443                 }
 444
 445                 (*i)[route_display_columns.visible] = yn;
 446         }
 447
 448         no_route_list_redisplay = false;
 449         redisplay_route_list ();
 450 }
 451
 452 void
 453 Editor::set_all_audio_visibility (int tracks, bool yn)
 454 {
 455         TreeModel::Children rows = route_display_model->children();
 456         TreeModel::Children::iterator i;
 457
 458         no_route_list_redisplay = true;
 459
 460         for (i = rows.begin(); i != rows.end(); ++i) {
 461                 TreeModel::Row row = (*i);
 462                 TimeAxisView* tv = row[route_display_columns.tv];
 463                 AudioTimeAxisView* atv;
 464
 465                 if (tv == 0) {
 466                         continue;
 467                 }
 468
 469                 if ((atv = dynamic_cast<AudioTimeAxisView*>(tv)) != 0) {
 470                         switch (tracks) {
 471                         case 0:
 472                                 (*i)[route_display_columns.visible] = yn;
 473                                 break;
 474
 475                         case 1:
 476                                 if (atv->is_audio_track()) {
 477                                         (*i)[route_display_columns.visible] = yn;
 478                                 }
 479                                 break;
 480
 481                         case 2:
 482                                 if (!atv->is_audio_track()) {
 483                                         (*i)[route_display_columns.visible] = yn;
 484                                 }
 485                                 break;
 486                         }
 487                 }
 488         }
 489
 490         no_route_list_redisplay = false;
 491         redisplay_route_list ();
 492 }
 493
 494 void
 495 Editor::hide_all_routes ()
 496 {
 497         set_all_tracks_visibility (false);
 498 }
 499
 500 void
 501 Editor::show_all_routes ()
 502 {
 503         set_all_tracks_visibility (true);
 504 }
 505
 506 void
 507 Editor::show_all_audiobus ()
 508 {
 509         set_all_audio_visibility (2, true);
 510 }
 511 void
 512 Editor::hide_all_audiobus ()
 513 {
 514         set_all_audio_visibility (2, false);
 515 }
 516
 517 void
 518 Editor::show_all_audiotracks()
 519 {
 520         set_all_audio_visibility (1, true);
 521 }
 522 void
 523 Editor::hide_all_audiotracks ()
 524 {
 525         set_all_audio_visibility (1, false);
 526 }
 527
 528 bool
 529 Editor::route_list_display_button_press (GdkEventButton* ev)
 530 {
 531         if (Keyboard::is_context_menu_event (ev)) {
 532                 show_route_list_menu ();
 533                 return true;
 534         }
 535
 536         TreeIter iter;
 537         TreeModel::Path path;
 538         TreeViewColumn* column;
 539         int cellx;
 540         int celly;
 541
 542         if (!route_list_display.get_path_at_pos ((int)ev->x, (int)ev->y, path, column, cellx, celly)) {
 543                 return false;
 544         }
 545
 546         switch (GPOINTER_TO_UINT (column->get_data (X_("colnum")))) {
 547         case 0:
 548                 if ((iter = route_display_model->get_iter (path))) {
 549                         TimeAxisView* tv = (*iter)[route_display_columns.tv];
 550                         if (tv) {
 551                                 bool visible = (*iter)[route_display_columns.visible];
 552                                 (*iter)[route_display_columns.visible] = !visible;
 553                         }
 554                 }
 555                 return true;
 556
 557         case 1:
 558                 /* allow normal processing to occur */
 559                 return false;
 560
 561         default:
 562                 break;
 563         }
 564
 565         return false;
 566 }
 567
 568 void
 569 Editor::show_route_list_menu()
 570 {
 571         if (route_list_menu == 0) {
 572                 build_route_list_menu ();
 573         }
 574
 575         route_list_menu->popup (1, gtk_get_current_event_time());
 576 }
 577
 578 bool
 579 Editor::route_list_selection_filter (const Glib::RefPtr<TreeModel>& model, const TreeModel::Path& path, bool yn)
 580 {
 581         return true;
 582 }
 583
 584 struct EditorOrderRouteSorter {
 585     bool operator() (boost::shared_ptr<Route> a, boost::shared_ptr<Route> b) {
 586             /* use of ">" forces the correct sort order */
 587             return a->order_key (_order_key) < b->order_key (_order_key);
 588     }
 589 };
 590
 591 void
 592 Editor::initial_route_list_display ()
 593 {
 594         boost::shared_ptr<Session::RouteList> routes = session->get_routes();
 595         Session::RouteList r (*routes);
 596         EditorOrderRouteSorter sorter;
 597
 598         r.sort (sorter);
 599
 600         no_route_list_redisplay = true;
 601
 602         route_display_model->clear ();
 603
 604         handle_new_route (r);
 605
 606         no_route_list_redisplay = false;
 607
 608         redisplay_route_list ();
 609 }
 610
 611 void
 612 Editor::track_list_reorder (const Gtk::TreeModel::Path& path,const Gtk::TreeModel::iterator& iter, int* new_order)
 613 {
 614         route_redisplay_does_not_sync_order_keys = true;
 615         session->set_remote_control_ids();
 616         redisplay_route_list ();
 617         route_redisplay_does_not_sync_order_keys = false;
 618 }
 619
 620 void
 621 Editor::route_list_change (const Gtk::TreeModel::Path& path,const Gtk::TreeModel::iterator& iter)
 622 {
 623         /* never reset order keys because of a property change */
 624         route_redisplay_does_not_reset_order_keys = true;
 625         session->set_remote_control_ids();
 626         redisplay_route_list ();
 627         route_redisplay_does_not_reset_order_keys = false;
 628 }
 629
 630 void
 631 Editor::route_list_delete (const Gtk::TreeModel::Path& path)
 632 {
 633         /* this could require an order reset & sync */
 634         session->set_remote_control_ids();
 635         ignore_route_list_reorder = true;
 636         redisplay_route_list ();
 637         ignore_route_list_reorder = false;
 638 }
 639
 640 void
 641 Editor::route_list_display_drag_data_received (const RefPtr<Gdk::DragContext>& context,
 642                                                 int x, int y,
 643                                                 const SelectionData& data,
 644                                                 guint info, guint time)
 645 {
 646         if (data.get_target() == "GTK_TREE_MODEL_ROW") {
 647                 route_list_display.on_drag_data_received (context, x, y, data, info, time);
 648                 return;
 649         }
 650         context->drag_finish (true, false, time);
 651 }
 652
 653 RouteTimeAxisView*
 654 Editor::get_route_view_by_id (PBD::ID& id)
 655 {
 656         RouteTimeAxisView* v;
 657
 658         for(TrackViewList::iterator i = track_views.begin(); i != track_views.end(); ++i) {
 659                 if((v = dynamic_cast<RouteTimeAxisView*>(*i)) != 0) {
 660                         if(v->route()->id() == id) {
 661                                 return v;
 662                         }
 663                 }
 664         }
 665
 666         return 0;
 667 }
 668
 669 void
 670 Editor::foreach_time_axis_view (sigc::slot<void,TimeAxisView&> theslot)
 671 {
 672         for (TrackViewList::iterator i = track_views.begin(); i != track_views.end(); ++i) {
 673                 theslot (**i);
 674         }
 675 }
 676
 677 void
 678 Editor::move_selected_tracks (bool up)
 679 {
 680         if (selection->tracks.empty()) {
 681                 return;
 682         }
 683
 684         typedef std::pair<TimeAxisView*,boost::shared_ptr<Route> > ViewRoute;
 685         std::list<ViewRoute> view_routes;
 686         std::vector<int> neworder;
 687         TreeModel::Children rows = route_display_model->children();
 688         TreeModel::Children::iterator ri;
 689
 690         for (ri = rows.begin(); ri != rows.end(); ++ri) {
 691                 TimeAxisView* tv = (*ri)[route_display_columns.tv];
 692                 boost::shared_ptr<Route> route = (*ri)[route_display_columns.route];
 693
 694                 view_routes.push_back (ViewRoute (tv, route));
 695         }
 696
 697         list<ViewRoute>::iterator trailing;
 698         list<ViewRoute>::iterator leading;
 699
 700         if (up) {
 701
 702                 trailing = view_routes.begin();
 703                 leading = view_routes.begin();
 704
 705                 ++leading;
 706
 707                 while (leading != view_routes.end()) {
 708                         if (selection->selected (leading->first)) {
 709                                 view_routes.insert (trailing, ViewRoute (leading->first, leading->second));
 710                                 leading = view_routes.erase (leading);
 711                         } else {
 712                                 ++leading;
 713                                 ++trailing;
 714                         }
 715                 }
 716
 717         } else {
 718
 719                 /* if we could use reverse_iterator in list::insert, this code
 720                    would be a beautiful reflection of the code above. but we can't
 721                    and so it looks like a bit of a mess.
 722                 */
 723
 724                 trailing = view_routes.end();
 725                 leading = view_routes.end();
 726
 727                 --leading; if (leading == view_routes.begin()) { return; }
 728                 --leading;
 729                 --trailing;
 730
 731                 while (1) {
 732
 733                         if (selection->selected (leading->first)) {
 734                                 list<ViewRoute>::iterator tmp;
 735
 736                                 /* need to insert *after* trailing, not *before* it,
 737                                    which is what insert (iter, val) normally does.
 738                                 */
 739
 740                                 tmp = trailing;
 741                                 tmp++;
 742
 743                                 view_routes.insert (tmp, ViewRoute (leading->first, leading->second));
 744
 745                                 /* can't use iter = cont.erase (iter); form here, because
 746                                    we need iter to move backwards.
 747                                 */
 748
 749                                 tmp = leading;
 750                                 --tmp;
 751
 752                                 bool done = false;
 753
 754                                 if (leading == view_routes.begin()) {
 755                                         /* the one we've just inserted somewhere else
 756                                            was the first in the list. erase this copy,
 757                                            and then break, because we're done.
 758                                         */
 759                                         done = true;
 760                                 }
 761
 762                                 view_routes.erase (leading);
 763
 764                                 if (done) {
 765                                         break;
 766                                 }
 767
 768                                 leading = tmp;
 769
 770                         } else {
 771                                 if (leading == view_routes.begin()) {
 772                                         break;
 773                                 }
 774                                 --leading;
 775                                 --trailing;
 776                         }
 777                 };
 778         }
 779
 780         for (leading = view_routes.begin(); leading != view_routes.end(); ++leading) {
 781                 neworder.push_back (leading->second->order_key (_order_key));
 782         }
 783
 784         route_display_model->reorder (neworder);
 785
 786         session->sync_order_keys (_order_key);
 787 }