gtk2_ardour/mixer_ui.cc

   1 /*
   2     Copyright (C) 2000-2004 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 #ifdef WAF_BUILD
  21 #include "gtk2ardour-config.h"
  22 #endif
  23
  24 #include <algorithm>
  25 #include <map>
  26 #include <sigc++/bind.h>
  27
  28 #include <gtkmm/accelmap.h>
  29
  30 #include "pbd/convert.h"
  31 #include "pbd/unwind.h"
  32
  33 #include <glibmm/threads.h>
  34
  35 #include <gtkmm2ext/gtk_ui.h>
  36 #include <gtkmm2ext/utils.h>
  37 #include <gtkmm2ext/tearoff.h>
  38 #include <gtkmm2ext/window_title.h>
  39
  40 #include "ardour/debug.h"
  41 #include "ardour/midi_track.h"
  42 #include "ardour/plugin_manager.h"
  43 #include "ardour/route_group.h"
  44 #include "ardour/route_sorters.h"
  45 #include "ardour/session.h"
  46
  47 #include "keyboard.h"
  48 #include "mixer_ui.h"
  49 #include "mixer_strip.h"
  50 #include "monitor_section.h"
  51 #include "plugin_selector.h"
  52 #include "public_editor.h"
  53 #include "ardour_ui.h"
  54 #include "prompter.h"
  55 #include "utils.h"
  56 #include "route_sorter.h"
  57 #include "actions.h"
  58 #include "gui_thread.h"
  59 #include "mixer_group_tabs.h"
  60 #include "timers.h"
  61
  62 #include "i18n.h"
  63
  64 using namespace ARDOUR;
  65 using namespace ARDOUR_UI_UTILS;
  66 using namespace PBD;
  67 using namespace Gtk;
  68 using namespace Glib;
  69 using namespace Gtkmm2ext;
  70 using namespace std;
  71
  72 using PBD::atoi;
  73 using PBD::Unwinder;
  74
  75 Mixer_UI* Mixer_UI::_instance = 0;
  76
  77 Mixer_UI*
  78 Mixer_UI::instance ()
  79 {
  80         if (!_instance) {
  81                 _instance  = new Mixer_UI;
  82         }
  83
  84         return _instance;
  85 }
  86
  87 Mixer_UI::Mixer_UI ()
  88         : Window (Gtk::WINDOW_TOPLEVEL)
  89         , VisibilityTracker (*((Gtk::Window*) this))
  90         , _visible (false)
  91         , no_track_list_redisplay (false)
  92         , in_group_row_change (false)
  93         , track_menu (0)
  94         , _monitor_section (0)
  95         , _strip_width (ARDOUR_UI::config()->get_default_narrow_ms() ? Narrow : Wide)
  96         , ignore_reorder (false)
  97         , _in_group_rebuild_or_clear (false)
  98         , _route_deletion_in_progress (false)
  99         , _following_editor_selection (false)
 100         , _maximised (false)
 101 {
 102         /* allow this window to become the key focus window */
 103         set_flags (CAN_FOCUS);
 104
 105         Route::SyncOrderKeys.connect (*this, invalidator (*this), boost::bind (&Mixer_UI::sync_treeview_from_order_keys, this), gui_context());
 106
 107         scroller.set_can_default (true);
 108         set_default (scroller);
 109
 110         scroller_base.set_flags (Gtk::CAN_FOCUS);
 111         scroller_base.add_events (Gdk::BUTTON_PRESS_MASK|Gdk::BUTTON_RELEASE_MASK);
 112         scroller_base.set_name ("MixerWindow");
 113         scroller_base.signal_button_release_event().connect (sigc::mem_fun(*this, &Mixer_UI::strip_scroller_button_release));
 114         // add as last item of strip packer
 115         strip_packer.pack_end (scroller_base, true, true);
 116
 117         _group_tabs = new MixerGroupTabs (this);
 118         VBox* b = manage (new VBox);
 119         b->pack_start (*_group_tabs, PACK_SHRINK);
 120         b->pack_start (strip_packer);
 121         b->show_all ();
 122
 123         scroller.add (*b);
 124         scroller.set_policy (Gtk::POLICY_ALWAYS, Gtk::POLICY_AUTOMATIC);
 125
 126         setup_track_display ();
 127
 128         group_model = ListStore::create (group_columns);
 129         group_display.set_model (group_model);
 130         group_display.append_column (_("Group"), group_columns.text);
 131         group_display.append_column (_("Show"), group_columns.visible);
 132         group_display.get_column (0)->set_data (X_("colnum"), GUINT_TO_POINTER(0));
 133         group_display.get_column (1)->set_data (X_("colnum"), GUINT_TO_POINTER(1));
 134         group_display.get_column (0)->set_expand(true);
 135         group_display.get_column (1)->set_expand(false);
 136         group_display.set_name ("EditGroupList");
 137         group_display.get_selection()->set_mode (Gtk::SELECTION_SINGLE);
 138         group_display.set_reorderable (true);
 139         group_display.set_headers_visible (true);
 140         group_display.set_rules_hint (true);
 141
 142         /* name is directly editable */
 143
 144         CellRendererText* name_cell = dynamic_cast<CellRendererText*>(group_display.get_column_cell_renderer (0));
 145         name_cell->property_editable() = true;
 146         name_cell->signal_edited().connect (sigc::mem_fun (*this, &Mixer_UI::route_group_name_edit));
 147
 148         /* use checkbox for the active column */
 149
 150         CellRendererToggle* active_cell = dynamic_cast<CellRendererToggle*>(group_display.get_column_cell_renderer (1));
 151         active_cell->property_activatable() = true;
 152         active_cell->property_radio() = false;
 153
 154         group_model->signal_row_changed().connect (sigc::mem_fun (*this, &Mixer_UI::route_group_row_change));
 155         /* We use this to notice drag-and-drop reorders of the group list */
 156         group_model->signal_row_deleted().connect (sigc::mem_fun (*this, &Mixer_UI::route_group_row_deleted));
 157         group_display.signal_button_press_event().connect (sigc::mem_fun (*this, &Mixer_UI::group_display_button_press), false);
 158
 159         group_display_scroller.add (group_display);
 160         group_display_scroller.set_policy (Gtk::POLICY_NEVER, Gtk::POLICY_AUTOMATIC);
 161
 162         HBox* route_group_display_button_box = manage (new HBox());
 163
 164         Button* route_group_add_button = manage (new Button ());
 165         Button* route_group_remove_button = manage (new Button ());
 166
 167         Widget* w;
 168
 169         w = manage (new Image (Stock::ADD, ICON_SIZE_BUTTON));
 170         w->show();
 171         route_group_add_button->add (*w);
 172
 173         w = manage (new Image (Stock::REMOVE, ICON_SIZE_BUTTON));
 174         w->show();
 175         route_group_remove_button->add (*w);
 176
 177         route_group_display_button_box->set_homogeneous (true);
 178
 179         route_group_add_button->signal_clicked().connect (sigc::mem_fun (*this, &Mixer_UI::new_route_group));
 180         route_group_remove_button->signal_clicked().connect (sigc::mem_fun (*this, &Mixer_UI::remove_selected_route_group));
 181
 182         route_group_display_button_box->add (*route_group_add_button);
 183         route_group_display_button_box->add (*route_group_remove_button);
 184
 185         group_display_vbox.pack_start (group_display_scroller, true, true);
 186         group_display_vbox.pack_start (*route_group_display_button_box, false, false);
 187
 188         group_display_frame.set_name ("BaseFrame");
 189         group_display_frame.set_shadow_type (Gtk::SHADOW_IN);
 190         group_display_frame.add (group_display_vbox);
 191
 192         rhs_pane1.pack1 (track_display_frame);
 193         rhs_pane1.pack2 (group_display_frame);
 194
 195         list_vpacker.pack_start (rhs_pane1, true, true);
 196
 197         global_hpacker.pack_start (scroller, true, true);
 198 #ifdef GTKOSX
 199         /* current gtk-quartz has dirty updates on borders like this one */
 200         global_hpacker.pack_start (out_packer, false, false, 0);
 201 #else
 202         global_hpacker.pack_start (out_packer, false, false, 12);
 203 #endif
 204         list_hpane.pack1(list_vpacker, false, false);
 205         list_hpane.pack2(global_hpacker, true, false);
 206
 207         rhs_pane1.signal_size_allocate().connect (sigc::bind (sigc::mem_fun(*this, &Mixer_UI::pane_allocation_handler),
 208                                                         static_cast<Gtk::Paned*> (&rhs_pane1)));
 209         list_hpane.signal_size_allocate().connect (sigc::bind (sigc::mem_fun(*this, &Mixer_UI::pane_allocation_handler),
 210                                                          static_cast<Gtk::Paned*> (&list_hpane)));
 211
 212         global_vpacker.pack_start (list_hpane, true, true);
 213
 214         add (global_vpacker);
 215         set_name ("MixerWindow");
 216
 217         update_title ();
 218
 219         set_wmclass (X_("ardour_mixer"), PROGRAM_NAME);
 220
 221         signal_delete_event().connect (sigc::mem_fun (*this, &Mixer_UI::hide_window));
 222         add_events (Gdk::KEY_PRESS_MASK|Gdk::KEY_RELEASE_MASK);
 223
 224         signal_configure_event().connect (sigc::mem_fun (*ARDOUR_UI::instance(), &ARDOUR_UI::configure_handler));
 225
 226         route_group_display_button_box->show();
 227         route_group_add_button->show();
 228         route_group_remove_button->show();
 229
 230         global_hpacker.show();
 231         global_vpacker.show();
 232         scroller.show();
 233         scroller_base.show();
 234         scroller_hpacker.show();
 235         mixer_scroller_vpacker.show();
 236         list_vpacker.show();
 237         group_display_button_label.show();
 238         group_display_button.show();
 239         group_display_scroller.show();
 240         group_display_vbox.show();
 241         group_display_frame.show();
 242         rhs_pane1.show();
 243         strip_packer.show();
 244         out_packer.show();
 245         list_hpane.show();
 246         group_display.show();
 247
 248         MixerStrip::CatchDeletion.connect (*this, invalidator (*this), boost::bind (&Mixer_UI::remove_strip, this, _1), gui_context());
 249
 250 #ifndef DEFER_PLUGIN_SELECTOR_LOAD
 251         _plugin_selector = new PluginSelector (PluginManager::instance ());
 252 #endif
 253 }
 254
 255 Mixer_UI::~Mixer_UI ()
 256 {
 257         if (_monitor_section) {
 258                 delete _monitor_section;
 259         }
 260 }
 261
 262 void
 263 Mixer_UI::track_editor_selection ()
 264 {
 265         PublicEditor::instance().get_selection().TracksChanged.connect (sigc::mem_fun (*this, &Mixer_UI::follow_editor_selection));
 266 }
 267
 268
 269 void
 270 Mixer_UI::ensure_float (Window& win)
 271 {
 272         win.set_transient_for (*this);
 273 }
 274
 275 void
 276 Mixer_UI::show_window ()
 277 {
 278         present ();
 279         if (!_visible) {
 280                 set_window_pos_and_size ();
 281
 282                 /* show/hide group tabs as required */
 283                 parameter_changed ("show-group-tabs");
 284
 285                 /* now reset each strips width so the right widgets are shown */
 286                 MixerStrip* ms;
 287
 288                 TreeModel::Children rows = track_model->children();
 289                 TreeModel::Children::iterator ri;
 290
 291                 for (ri = rows.begin(); ri != rows.end(); ++ri) {
 292                         ms = (*ri)[track_columns.strip];
 293                         ms->set_width_enum (ms->get_width_enum (), ms->width_owner());
 294                         /* Fix visibility of mixer strip stuff */
 295                         ms->parameter_changed (X_("mixer-element-visibility"));
 296                 }
 297         }
 298
 299         /* force focus into main area */
 300         scroller_base.grab_focus ();
 301
 302         _visible = true;
 303 }
 304
 305 bool
 306 Mixer_UI::hide_window (GdkEventAny *ev)
 307 {
 308         get_window_pos_and_size ();
 309
 310         _visible = false;
 311         return just_hide_it(ev, static_cast<Gtk::Window *>(this));
 312 }
 313
 314
 315 void
 316 Mixer_UI::add_strips (RouteList& routes)
 317 {
 318         bool from_scratch = track_model->children().size() == 0;
 319         Gtk::TreeModel::Children::iterator insert_iter = track_model->children().end();
 320
 321         for (Gtk::TreeModel::Children::iterator it = track_model->children().begin(); it != track_model->children().end(); ++it) {
 322                 boost::shared_ptr<Route> r = (*it)[track_columns.route];
 323
 324                 if (r->order_key() == (routes.front()->order_key() + routes.size())) {
 325                         insert_iter = it;
 326                         break;
 327                 }
 328         }
 329
 330         if(!from_scratch) {
 331                 _selection.clear_routes ();
 332         }
 333
 334         MixerStrip* strip;
 335
 336         try {
 337                 no_track_list_redisplay = true;
 338                 track_display.set_model (Glib::RefPtr<ListStore>());
 339
 340                 for (RouteList::iterator x = routes.begin(); x != routes.end(); ++x) {
 341                         boost::shared_ptr<Route> route = (*x);
 342
 343                         if (route->is_auditioner()) {
 344                                 continue;
 345                         }
 346
 347                         if (route->is_monitor()) {
 348
 349                                 if (!_monitor_section) {
 350                                         _monitor_section = new MonitorSection (_session);
 351
 352                                         XMLNode* mnode = ARDOUR_UI::instance()->tearoff_settings (X_("monitor-section"));
 353                                         if (mnode) {
 354                                                 _monitor_section->tearoff().set_state (*mnode);
 355                                         }
 356                                 }
 357
 358                                 out_packer.pack_end (_monitor_section->tearoff(), false, false);
 359                                 _monitor_section->set_session (_session);
 360                                 _monitor_section->tearoff().show_all ();
 361
 362                                 route->DropReferences.connect (*this, invalidator(*this), boost::bind (&Mixer_UI::monitor_section_going_away, this), gui_context());
 363
 364                                 /* no regular strip shown for control out */
 365
 366                                 continue;
 367                         }
 368
 369                         strip = new MixerStrip (*this, _session, route);
 370                         strips.push_back (strip);
 371
 372                         ARDOUR_UI::config()->get_default_narrow_ms() ? _strip_width = Narrow : _strip_width = Wide;
 373
 374                         if (strip->width_owner() != strip) {
 375                                 strip->set_width_enum (_strip_width, this);
 376                         }
 377
 378                         show_strip (strip);
 379
 380                         TreeModel::Row row = *(track_model->insert(insert_iter));
 381                         row[track_columns.text] = route->name();
 382                         row[track_columns.visible] = strip->route()->is_master() ? true : strip->marked_for_display();
 383                         row[track_columns.route] = route;
 384                         row[track_columns.strip] = strip;
 385
 386                         if (!from_scratch) {
 387                                 _selection.add (strip);
 388                         }
 389
 390                         route->PropertyChanged.connect (*this, invalidator (*this), boost::bind (&Mixer_UI::strip_property_changed, this, _1, strip), gui_context());
 391
 392                         strip->WidthChanged.connect (sigc::mem_fun(*this, &Mixer_UI::strip_width_changed));
 393                         strip->signal_button_release_event().connect (sigc::bind (sigc::mem_fun(*this, &Mixer_UI::strip_button_release_event), strip));
 394                 }
 395
 396         } catch (...) {
 397         }
 398
 399         no_track_list_redisplay = false;
 400         track_display.set_model (track_model);
 401
 402         sync_order_keys_from_treeview ();
 403         redisplay_track_list ();
 404 }
 405
 406 void
 407 Mixer_UI::deselect_all_strip_processors ()
 408 {
 409         for (list<MixerStrip *>::iterator i = strips.begin(); i != strips.end(); ++i) {
 410                 (*i)->deselect_all_processors();
 411         }
 412 }
 413
 414 void
 415 Mixer_UI::select_none ()
 416 {
 417         _selection.clear_routes();
 418         deselect_all_strip_processors();
 419 }
 420
 421 void
 422 Mixer_UI::delete_processors ()
 423 {
 424         for (list<MixerStrip *>::iterator i = strips.begin(); i != strips.end(); ++i) {
 425                 (*i)->delete_processors();
 426         }
 427 }
 428
 429
 430 void
 431 Mixer_UI::remove_strip (MixerStrip* strip)
 432 {
 433         if (_session && _session->deletion_in_progress()) {
 434                 /* its all being taken care of */
 435                 return;
 436         }
 437
 438         TreeModel::Children rows = track_model->children();
 439         TreeModel::Children::iterator ri;
 440         list<MixerStrip *>::iterator i;
 441
 442         if ((i = find (strips.begin(), strips.end(), strip)) != strips.end()) {
 443                 strips.erase (i);
 444         }
 445
 446         for (ri = rows.begin(); ri != rows.end(); ++ri) {
 447                 if ((*ri)[track_columns.strip] == strip) {
 448                         PBD::Unwinder<bool> uw (_route_deletion_in_progress, true);
 449                         track_model->erase (ri);
 450                         break;
 451                 }
 452         }
 453 }
 454
 455 void
 456 Mixer_UI::reset_remote_control_ids ()
 457 {
 458         if (Config->get_remote_model() == UserOrdered || !_session || _session->deletion_in_progress()) {
 459                 return;
 460         }
 461
 462         TreeModel::Children rows = track_model->children();
 463
 464         if (rows.empty()) {
 465                 return;
 466         }
 467
 468         DEBUG_TRACE (DEBUG::OrderKeys, "mixer resets remote control ids after remote model change\n");
 469
 470         TreeModel::Children::iterator ri;
 471         bool rid_change = false;
 472         uint32_t rid = 1;
 473         uint32_t invisible_key = UINT32_MAX;
 474
 475         for (ri = rows.begin(); ri != rows.end(); ++ri) {
 476
 477                 /* skip two special values */
 478
 479                 if (rid == Route::MasterBusRemoteControlID) {
 480                         rid++;
 481                 }
 482
 483                 if (rid == Route::MonitorBusRemoteControlID) {
 484                         rid++;
 485                 }
 486
 487                 boost::shared_ptr<Route> route = (*ri)[track_columns.route];
 488                 bool visible = (*ri)[track_columns.visible];
 489
 490                 if (!route->is_master() && !route->is_monitor()) {
 491
 492                         uint32_t new_rid = (visible ? rid : invisible_key--);
 493
 494                         if (new_rid != route->remote_control_id()) {
 495                                 route->set_remote_control_id_explicit (new_rid);
 496                                 rid_change = true;
 497                         }
 498
 499                         if (visible) {
 500                                 rid++;
 501                         }
 502                 }
 503         }
 504
 505         if (rid_change) {
 506                 /* tell the world that we changed the remote control IDs */
 507                 _session->notify_remote_id_change ();
 508         }
 509 }
 510
 511 void
 512 Mixer_UI::sync_order_keys_from_treeview ()
 513 {
 514         if (ignore_reorder || !_session || _session->deletion_in_progress()) {
 515                 return;
 516         }
 517
 518         TreeModel::Children rows = track_model->children();
 519
 520         if (rows.empty()) {
 521                 return;
 522         }
 523
 524         DEBUG_TRACE (DEBUG::OrderKeys, "mixer sync order keys from model\n");
 525
 526         TreeModel::Children::iterator ri;
 527         bool changed = false;
 528         bool rid_change = false;
 529         uint32_t order = 0;
 530         uint32_t rid = 1;
 531         uint32_t invisible_key = UINT32_MAX;
 532
 533         for (ri = rows.begin(); ri != rows.end(); ++ri) {
 534                 boost::shared_ptr<Route> route = (*ri)[track_columns.route];
 535                 bool visible = (*ri)[track_columns.visible];
 536
 537                 uint32_t old_key = route->order_key ();
 538
 539                 if (order != old_key) {
 540                         route->set_order_key (order);
 541                         changed = true;
 542                 }
 543
 544                 if ((Config->get_remote_model() == MixerOrdered) && !route->is_master() && !route->is_monitor()) {
 545
 546                         uint32_t new_rid = (visible ? rid : invisible_key--);
 547
 548                         if (new_rid != route->remote_control_id()) {
 549                                 route->set_remote_control_id_explicit (new_rid);
 550                                 rid_change = true;
 551                         }
 552
 553                         if (visible) {
 554                                 rid++;
 555                         }
 556
 557                 }
 558
 559                 ++order;
 560         }
 561
 562         if (changed) {
 563                 /* tell everyone that we changed the mixer sort keys */
 564                 _session->sync_order_keys ();
 565         }
 566
 567         if (rid_change) {
 568                 /* tell the world that we changed the remote control IDs */
 569                 _session->notify_remote_id_change ();
 570         }
 571 }
 572
 573 void
 574 Mixer_UI::sync_treeview_from_order_keys ()
 575 {
 576         if (!_session || _session->deletion_in_progress()) {
 577                 return;
 578         }
 579
 580         DEBUG_TRACE (DEBUG::OrderKeys, "mixer sync model from order keys.\n");
 581
 582         /* we could get here after either a change in the Mixer or Editor sort
 583          * order, but either way, the mixer order keys reflect the intended
 584          * order for the GUI, so reorder the treeview model to match it.
 585          */
 586
 587         vector<int> neworder;
 588         TreeModel::Children rows = track_model->children();
 589         uint32_t old_order = 0;
 590         bool changed = false;
 591
 592         if (rows.empty()) {
 593                 return;
 594         }
 595
 596         OrderKeySortedRoutes sorted_routes;
 597
 598         for (TreeModel::Children::iterator ri = rows.begin(); ri != rows.end(); ++ri, ++old_order) {
 599                 boost::shared_ptr<Route> route = (*ri)[track_columns.route];
 600                 sorted_routes.push_back (RoutePlusOrderKey (route, old_order, route->order_key ()));
 601         }
 602
 603         SortByNewDisplayOrder cmp;
 604
 605         sort (sorted_routes.begin(), sorted_routes.end(), cmp);
 606         neworder.assign (sorted_routes.size(), 0);
 607
 608         uint32_t n = 0;
 609
 610         for (OrderKeySortedRoutes::iterator sr = sorted_routes.begin(); sr != sorted_routes.end(); ++sr, ++n) {
 611
 612                 neworder[n] = sr->old_display_order;
 613
 614                 if (sr->old_display_order != n) {
 615                         changed = true;
 616                 }
 617
 618                 DEBUG_TRACE (DEBUG::OrderKeys, string_compose ("MIXER change order for %1 from %2 to %3\n",
 619                                                                sr->route->name(), sr->old_display_order, n));
 620         }
 621
 622         if (changed) {
 623                 Unwinder<bool> uw (ignore_reorder, true);
 624                 track_model->reorder (neworder);
 625         }
 626
 627         redisplay_track_list ();
 628 }
 629
 630 void
 631 Mixer_UI::follow_editor_selection ()
 632 {
 633         if (!ARDOUR_UI::config()->get_link_editor_and_mixer_selection() || _following_editor_selection) {
 634                 return;
 635         }
 636
 637         _following_editor_selection = true;
 638         _selection.block_routes_changed (true);
 639
 640         TrackSelection& s (PublicEditor::instance().get_selection().tracks);
 641
 642         _selection.clear_routes ();
 643
 644         for (TrackViewList::iterator i = s.begin(); i != s.end(); ++i) {
 645                 RouteTimeAxisView* rtav = dynamic_cast<RouteTimeAxisView*> (*i);
 646                 if (rtav) {
 647                         MixerStrip* ms = strip_by_route (rtav->route());
 648                         if (ms) {
 649                                 _selection.add (ms);
 650                         }
 651                 }
 652         }
 653
 654         _following_editor_selection = false;
 655         _selection.block_routes_changed (false);
 656 }
 657
 658
 659 MixerStrip*
 660 Mixer_UI::strip_by_route (boost::shared_ptr<Route> r)
 661 {
 662         for (list<MixerStrip *>::iterator i = strips.begin(); i != strips.end(); ++i) {
 663                 if ((*i)->route() == r) {
 664                         return (*i);
 665                 }
 666         }
 667
 668         return 0;
 669 }
 670
 671 bool
 672 Mixer_UI::strip_button_release_event (GdkEventButton *ev, MixerStrip *strip)
 673 {
 674         if (ev->button == 1) {
 675                 if (_selection.selected (strip)) {
 676                         /* primary-click: toggle selection state of strip */
 677                         if (Keyboard::modifier_state_equals (ev->state, Keyboard::PrimaryModifier)) {
 678                                 _selection.remove (strip);
 679                         }
 680                 } else {
 681                         if (Keyboard::modifier_state_equals (ev->state, Keyboard::PrimaryModifier)) {
 682                                 _selection.add (strip);
 683                         } else if (Keyboard::modifier_state_equals (ev->state, Keyboard::RangeSelectModifier)) {
 684
 685                                 if (!_selection.selected(strip)) {
 686
 687                                         /* extend selection */
 688
 689                                         vector<MixerStrip*> tmp;
 690                                         bool accumulate = false;
 691                                         bool found_another = false;
 692
 693                                         tmp.push_back (strip);
 694
 695                                         for (list<MixerStrip*>::iterator i = strips.begin(); i != strips.end(); ++i) {
 696                                                 if ((*i) == strip) {
 697                                                         /* hit clicked strip, start accumulating till we hit the first
 698                                                            selected strip
 699                                                         */
 700                                                         if (accumulate) {
 701                                                                 /* done */
 702                                                                 break;
 703                                                         } else {
 704                                                                 accumulate = true;
 705                                                         }
 706                                                 } else if (_selection.selected (*i)) {
 707                                                         /* hit selected strip. if currently accumulating others,
 708                                                            we're done. if not accumulating others, start doing so.
 709                                                         */
 710                                                         found_another = true;
 711                                                         if (accumulate) {
 712                                                                 /* done */
 713                                                                 break;
 714                                                         } else {
 715                                                                 accumulate = true;
 716                                                         }
 717                                                 } else {
 718                                                         if (accumulate) {
 719                                                                 tmp.push_back (*i);
 720                                                         }
 721                                                 }
 722                                         }
 723
 724                                         if (found_another) {
 725                                                 for (vector<MixerStrip*>::iterator i = tmp.begin(); i != tmp.end(); ++i) {
 726                                                         _selection.add (*i);
 727                                                 }
 728                                         } else
 729                                                 _selection.set (strip);  //user wants to start a range selection, but there aren't any others selected yet
 730                                 }
 731
 732                         } else {
 733                                 _selection.set (strip);
 734                         }
 735                 }
 736         }
 737
 738         return true;
 739 }
 740
 741 void
 742 Mixer_UI::set_session (Session* sess)
 743 {
 744         SessionHandlePtr::set_session (sess);
 745
 746         if (_plugin_selector) {
 747                 _plugin_selector->set_session (_session);
 748         }
 749
 750         _group_tabs->set_session (sess);
 751
 752         if (!_session) {
 753                 return;
 754         }
 755
 756         XMLNode* node = ARDOUR_UI::instance()->mixer_settings();
 757         set_state (*node);
 758
 759         update_title ();
 760
 761         initial_track_display ();
 762
 763         _session->RouteAdded.connect (_session_connections, invalidator (*this), boost::bind (&Mixer_UI::add_strips, this, _1), gui_context());
 764         _session->route_group_added.connect (_session_connections, invalidator (*this), boost::bind (&Mixer_UI::add_route_group, this, _1), gui_context());
 765         _session->route_group_removed.connect (_session_connections, invalidator (*this), boost::bind (&Mixer_UI::route_groups_changed, this), gui_context());
 766         _session->route_groups_reordered.connect (_session_connections, invalidator (*this), boost::bind (&Mixer_UI::route_groups_changed, this), gui_context());
 767         _session->config.ParameterChanged.connect (_session_connections, invalidator (*this), boost::bind (&Mixer_UI::parameter_changed, this, _1), gui_context());
 768         _session->DirtyChanged.connect (_session_connections, invalidator (*this), boost::bind (&Mixer_UI::update_title, this), gui_context());
 769         _session->StateSaved.connect (_session_connections, invalidator (*this), boost::bind (&Mixer_UI::update_title, this), gui_context());
 770
 771         Config->ParameterChanged.connect (*this, invalidator (*this), boost::bind (&Mixer_UI::parameter_changed, this, _1), gui_context ());
 772
 773         route_groups_changed ();
 774
 775         if (_visible) {
 776                 show_window();
 777
 778                 /* Bit of a hack; if we're here, we're opening the mixer because of our
 779                    instant XML state having a show-mixer property.  Fix up the corresponding
 780                    action state.
 781                 */
 782                 ActionManager::check_toggleaction ("<Actions>/Common/toggle-mixer");
 783         }
 784
 785         start_updating ();
 786 }
 787
 788 void
 789 Mixer_UI::session_going_away ()
 790 {
 791         ENSURE_GUI_THREAD (*this, &Mixer_UI::session_going_away);
 792
 793         _in_group_rebuild_or_clear = true;
 794         group_model->clear ();
 795         _in_group_rebuild_or_clear = false;
 796
 797         _selection.clear ();
 798         track_model->clear ();
 799
 800         for (list<MixerStrip *>::iterator i = strips.begin(); i != strips.end(); ++i) {
 801                 delete (*i);
 802         }
 803
 804         if (_monitor_section) {
 805                 _monitor_section->tearoff().hide_visible ();
 806         }
 807
 808         strips.clear ();
 809
 810         stop_updating ();
 811
 812         SessionHandlePtr::session_going_away ();
 813
 814         _session = 0;
 815         update_title ();
 816 }
 817
 818 void
 819 Mixer_UI::track_visibility_changed (std::string const & path)
 820 {
 821         if (_session && _session->deletion_in_progress()) {
 822                 return;
 823         }
 824
 825         TreeIter iter;
 826
 827         if ((iter = track_model->get_iter (path))) {
 828                 MixerStrip* strip = (*iter)[track_columns.strip];
 829                 if (strip) {
 830                         bool visible = (*iter)[track_columns.visible];
 831
 832                         if (strip->set_marked_for_display (!visible)) {
 833                                 update_track_visibility ();
 834                         }
 835                 }
 836         }
 837 }
 838
 839 void
 840 Mixer_UI::update_track_visibility ()
 841 {
 842         TreeModel::Children rows = track_model->children();
 843         TreeModel::Children::iterator i;
 844
 845         {
 846                 Unwinder<bool> uw (no_track_list_redisplay, true);
 847
 848                 for (i = rows.begin(); i != rows.end(); ++i) {
 849                         MixerStrip *strip = (*i)[track_columns.strip];
 850                         (*i)[track_columns.visible] = strip->marked_for_display ();
 851                 }
 852
 853                 /* force route order keys catch up with visibility changes
 854                  */
 855
 856                 sync_order_keys_from_treeview ();
 857         }
 858
 859         redisplay_track_list ();
 860 }
 861
 862 void
 863 Mixer_UI::show_strip (MixerStrip* ms)
 864 {
 865         TreeModel::Children rows = track_model->children();
 866         TreeModel::Children::iterator i;
 867
 868         for (i = rows.begin(); i != rows.end(); ++i) {
 869
 870                 MixerStrip* strip = (*i)[track_columns.strip];
 871                 if (strip == ms) {
 872                         (*i)[track_columns.visible] = true;
 873                         redisplay_track_list ();
 874                         break;
 875                 }
 876         }
 877 }
 878
 879 void
 880 Mixer_UI::hide_strip (MixerStrip* ms)
 881 {
 882         TreeModel::Children rows = track_model->children();
 883         TreeModel::Children::iterator i;
 884
 885         for (i = rows.begin(); i != rows.end(); ++i) {
 886
 887                 MixerStrip* strip = (*i)[track_columns.strip];
 888                 if (strip == ms) {
 889                         (*i)[track_columns.visible] = false;
 890                         redisplay_track_list ();
 891                         break;
 892                 }
 893         }
 894 }
 895
 896 gint
 897 Mixer_UI::start_updating ()
 898 {
 899     fast_screen_update_connection = Timers::super_rapid_connect (sigc::mem_fun(*this, &Mixer_UI::fast_update_strips));
 900     return 0;
 901 }
 902
 903 gint
 904 Mixer_UI::stop_updating ()
 905 {
 906     fast_screen_update_connection.disconnect();
 907     return 0;
 908 }
 909
 910 void
 911 Mixer_UI::fast_update_strips ()
 912 {
 913         if (is_mapped () && _session) {
 914                 for (list<MixerStrip *>::iterator i = strips.begin(); i != strips.end(); ++i) {
 915                         (*i)->fast_update ();
 916                 }
 917         }
 918 }
 919
 920 void
 921 Mixer_UI::set_all_strips_visibility (bool yn)
 922 {
 923         TreeModel::Children rows = track_model->children();
 924         TreeModel::Children::iterator i;
 925
 926         {
 927                 Unwinder<bool> uw (no_track_list_redisplay, true);
 928
 929                 for (i = rows.begin(); i != rows.end(); ++i) {
 930
 931                         TreeModel::Row row = (*i);
 932                         MixerStrip* strip = row[track_columns.strip];
 933
 934                         if (strip == 0) {
 935                                 continue;
 936                         }
 937
 938                         if (strip->route()->is_master() || strip->route()->is_monitor()) {
 939                                 continue;
 940                         }
 941
 942                         (*i)[track_columns.visible] = yn;
 943                 }
 944         }
 945
 946         redisplay_track_list ();
 947 }
 948
 949
 950 void
 951 Mixer_UI::set_all_audio_visibility (int tracks, bool yn)
 952 {
 953         TreeModel::Children rows = track_model->children();
 954         TreeModel::Children::iterator i;
 955
 956         {
 957                 Unwinder<bool> uw (no_track_list_redisplay, true);
 958
 959                 for (i = rows.begin(); i != rows.end(); ++i) {
 960                         TreeModel::Row row = (*i);
 961                         MixerStrip* strip = row[track_columns.strip];
 962
 963                         if (strip == 0) {
 964                                 continue;
 965                         }
 966
 967                         if (strip->route()->is_master() || strip->route()->is_monitor()) {
 968                                 continue;
 969                         }
 970
 971                         boost::shared_ptr<AudioTrack> at = strip->audio_track();
 972
 973                         switch (tracks) {
 974                         case 0:
 975                                 (*i)[track_columns.visible] = yn;
 976                                 break;
 977
 978                         case 1:
 979                                 if (at) { /* track */
 980                                         (*i)[track_columns.visible] = yn;
 981                                 }
 982                                 break;
 983
 984                         case 2:
 985                                 if (!at) { /* bus */
 986                                         (*i)[track_columns.visible] = yn;
 987                                 }
 988                                 break;
 989                         }
 990                 }
 991         }
 992
 993         redisplay_track_list ();
 994 }
 995
 996 void
 997 Mixer_UI::hide_all_routes ()
 998 {
 999         set_all_strips_visibility (false);
1000 }
1001
1002 void
1003 Mixer_UI::show_all_routes ()
1004 {
1005         set_all_strips_visibility (true);
1006 }
1007
1008 void
1009 Mixer_UI::show_all_audiobus ()
1010 {
1011         set_all_audio_visibility (2, true);
1012 }
1013 void
1014 Mixer_UI::hide_all_audiobus ()
1015 {
1016         set_all_audio_visibility (2, false);
1017 }
1018
1019 void
1020 Mixer_UI::show_all_audiotracks()
1021 {
1022         set_all_audio_visibility (1, true);
1023 }
1024 void
1025 Mixer_UI::hide_all_audiotracks ()
1026 {
1027         set_all_audio_visibility (1, false);
1028 }
1029
1030 void
1031 Mixer_UI::track_list_reorder (const TreeModel::Path&, const TreeModel::iterator&, int* /*new_order*/)
1032 {
1033         DEBUG_TRACE (DEBUG::OrderKeys, "mixer UI treeview reordered\n");
1034         sync_order_keys_from_treeview ();
1035 }
1036
1037 void
1038 Mixer_UI::track_list_delete (const Gtk::TreeModel::Path&)
1039 {
1040         /* this happens as the second step of a DnD within the treeview as well
1041            as when a row/route is actually deleted.
1042
1043            if it was a deletion then we have to force a redisplay because
1044            order keys may not have changed.
1045         */
1046
1047         DEBUG_TRACE (DEBUG::OrderKeys, "mixer UI treeview row deleted\n");
1048         sync_order_keys_from_treeview ();
1049
1050         if (_route_deletion_in_progress) {
1051                 redisplay_track_list ();
1052         }
1053 }
1054
1055 void
1056 Mixer_UI::redisplay_track_list ()
1057 {
1058         TreeModel::Children rows = track_model->children();
1059         TreeModel::Children::iterator i;
1060
1061         if (no_track_list_redisplay) {
1062                 return;
1063         }
1064
1065         for (i = rows.begin(); i != rows.end(); ++i) {
1066
1067                 MixerStrip* strip = (*i)[track_columns.strip];
1068
1069                 if (strip == 0) {
1070                         /* we're in the middle of changing a row, don't worry */
1071                         continue;
1072                 }
1073
1074                 bool const visible = (*i)[track_columns.visible];
1075
1076                 if (visible) {
1077                         strip->set_gui_property ("visible", true);
1078
1079                         if (strip->packed()) {
1080
1081                                 if (strip->route()->is_master() || strip->route()->is_monitor()) {
1082                                         out_packer.reorder_child (*strip, -1);
1083
1084                                 } else {
1085                                         strip_packer.reorder_child (*strip, -1); /* put at end */
1086                                 }
1087
1088                         } else {
1089
1090                                 if (strip->route()->is_master() || strip->route()->is_monitor()) {
1091                                         out_packer.pack_start (*strip, false, false);
1092                                 } else {
1093                                         strip_packer.pack_start (*strip, false, false);
1094                                 }
1095                                 strip->set_packed (true);
1096                         }
1097
1098                 } else {
1099
1100                         strip->set_gui_property ("visible", false);
1101
1102                         if (strip->route()->is_master() || strip->route()->is_monitor()) {
1103                                 /* do nothing, these cannot be hidden */
1104                         } else {
1105                                 if (strip->packed()) {
1106                                         strip_packer.remove (*strip);
1107                                         strip->set_packed (false);
1108                                 }
1109                         }
1110                 }
1111         }
1112
1113         _group_tabs->set_dirty ();
1114 }
1115
1116 void
1117 Mixer_UI::strip_width_changed ()
1118 {
1119         _group_tabs->set_dirty ();
1120
1121 #ifdef GTKOSX
1122         TreeModel::Children rows = track_model->children();
1123         TreeModel::Children::iterator i;
1124         long order;
1125
1126         for (order = 0, i = rows.begin(); i != rows.end(); ++i, ++order) {
1127                 MixerStrip* strip = (*i)[track_columns.strip];
1128
1129                 if (strip == 0) {
1130                         continue;
1131                 }
1132
1133                 bool visible = (*i)[track_columns.visible];
1134
1135                 if (visible) {
1136                         strip->queue_draw();
1137                 }
1138         }
1139 #endif
1140
1141 }
1142
1143 void
1144 Mixer_UI::initial_track_display ()
1145 {
1146         boost::shared_ptr<RouteList> routes = _session->get_routes();
1147         RouteList copy (*routes);
1148         ARDOUR::SignalOrderRouteSorter sorter;
1149
1150         copy.sort (sorter);
1151
1152         {
1153                 Unwinder<bool> uw1 (no_track_list_redisplay, true);
1154                 Unwinder<bool> uw2 (ignore_reorder, true);
1155
1156                 track_model->clear ();
1157                 add_strips (copy);
1158         }
1159
1160         _session->sync_order_keys ();
1161
1162         redisplay_track_list ();
1163 }
1164
1165 void
1166 Mixer_UI::show_track_list_menu ()
1167 {
1168         if (track_menu == 0) {
1169                 build_track_menu ();
1170         }
1171
1172         track_menu->popup (1, gtk_get_current_event_time());
1173 }
1174
1175 bool
1176 Mixer_UI::track_display_button_press (GdkEventButton* ev)
1177 {
1178         if (Keyboard::is_context_menu_event (ev)) {
1179                 show_track_list_menu ();
1180                 return true;
1181         }
1182
1183         return false;
1184 }
1185
1186 void
1187 Mixer_UI::build_track_menu ()
1188 {
1189         using namespace Menu_Helpers;
1190         using namespace Gtk;
1191
1192         track_menu = new Menu;
1193         track_menu->set_name ("ArdourContextMenu");
1194         MenuList& items = track_menu->items();
1195
1196         items.push_back (MenuElem (_("Show All"), sigc::mem_fun(*this, &Mixer_UI::show_all_routes)));
1197         items.push_back (MenuElem (_("Hide All"), sigc::mem_fun(*this, &Mixer_UI::hide_all_routes)));
1198         items.push_back (MenuElem (_("Show All Audio Tracks"), sigc::mem_fun(*this, &Mixer_UI::show_all_audiotracks)));
1199         items.push_back (MenuElem (_("Hide All Audio Tracks"), sigc::mem_fun(*this, &Mixer_UI::hide_all_audiotracks)));
1200         items.push_back (MenuElem (_("Show All Audio Busses"), sigc::mem_fun(*this, &Mixer_UI::show_all_audiobus)));
1201         items.push_back (MenuElem (_("Hide All Audio Busses"), sigc::mem_fun(*this, &Mixer_UI::hide_all_audiobus)));
1202
1203 }
1204
1205 void
1206 Mixer_UI::strip_property_changed (const PropertyChange& what_changed, MixerStrip* mx)
1207 {
1208         if (!what_changed.contains (ARDOUR::Properties::name)) {
1209                 return;
1210         }
1211
1212         ENSURE_GUI_THREAD (*this, &Mixer_UI::strip_name_changed, what_changed, mx)
1213
1214         TreeModel::Children rows = track_model->children();
1215         TreeModel::Children::iterator i;
1216
1217         for (i = rows.begin(); i != rows.end(); ++i) {
1218                 if ((*i)[track_columns.strip] == mx) {
1219                         (*i)[track_columns.text] = mx->route()->name();
1220                         return;
1221                 }
1222         }
1223
1224         error << _("track display list item for renamed strip not found!") << endmsg;
1225 }
1226
1227 bool
1228 Mixer_UI::group_display_button_press (GdkEventButton* ev)
1229 {
1230         TreeModel::Path path;
1231         TreeViewColumn* column;
1232         int cellx;
1233         int celly;
1234
1235         if (!group_display.get_path_at_pos ((int)ev->x, (int)ev->y, path, column, cellx, celly)) {
1236                 return false;
1237         }
1238
1239         TreeIter iter = group_model->get_iter (path);
1240         if (!iter) {
1241                 return false;
1242         }
1243
1244         RouteGroup* group = (*iter)[group_columns.group];
1245
1246         if (Keyboard::is_context_menu_event (ev)) {
1247                 _group_tabs->get_menu(group)->popup (1, ev->time);
1248                 return true;
1249         }
1250
1251         switch (GPOINTER_TO_UINT (column->get_data (X_("colnum")))) {
1252         case 0:
1253                 if (Keyboard::is_edit_event (ev)) {
1254                         if (group) {
1255                                 // edit_route_group (group);
1256 #ifdef GTKOSX
1257                                 group_display.queue_draw();
1258 #endif
1259                                 return true;
1260                         }
1261                 }
1262                 break;
1263
1264         case 1:
1265         {
1266                 bool visible = (*iter)[group_columns.visible];
1267                 (*iter)[group_columns.visible] = !visible;
1268 #ifdef GTKOSX
1269                 group_display.queue_draw();
1270 #endif
1271                 return true;
1272         }
1273
1274         default:
1275                 break;
1276         }
1277
1278         return false;
1279  }
1280
1281 void
1282 Mixer_UI::activate_all_route_groups ()
1283 {
1284         _session->foreach_route_group (sigc::bind (sigc::mem_fun (*this, &Mixer_UI::set_route_group_activation), true));
1285 }
1286
1287 void
1288 Mixer_UI::disable_all_route_groups ()
1289 {
1290         _session->foreach_route_group (sigc::bind (sigc::mem_fun (*this, &Mixer_UI::set_route_group_activation), false));
1291 }
1292
1293 void
1294 Mixer_UI::route_groups_changed ()
1295 {
1296         ENSURE_GUI_THREAD (*this, &Mixer_UI::route_groups_changed);
1297
1298         _in_group_rebuild_or_clear = true;
1299
1300         /* just rebuild the while thing */
1301
1302         group_model->clear ();
1303
1304 #if 0
1305         /* this is currently not used,
1306          * Mixer_UI::group_display_button_press() has a case for it,
1307          * and a commented edit_route_group() but that's n/a since 2011.
1308          *
1309          * This code is left as reminder that
1310          * row[group_columns.group] = 0 has special meaning.
1311          */
1312         {
1313                 TreeModel::Row row;
1314                 row = *(group_model->append());
1315                 row[group_columns.visible] = true;
1316                 row[group_columns.text] = (_("-all-"));
1317                 row[group_columns.group] = 0;
1318         }
1319 #endif
1320
1321         _session->foreach_route_group (sigc::mem_fun (*this, &Mixer_UI::add_route_group));
1322
1323         _group_tabs->set_dirty ();
1324         _in_group_rebuild_or_clear = false;
1325 }
1326
1327 void
1328 Mixer_UI::new_route_group ()
1329 {
1330         RouteList rl;
1331
1332         _group_tabs->run_new_group_dialog (rl);
1333 }
1334
1335 void
1336 Mixer_UI::remove_selected_route_group ()
1337 {
1338         Glib::RefPtr<TreeSelection> selection = group_display.get_selection();
1339         TreeView::Selection::ListHandle_Path rows = selection->get_selected_rows ();
1340
1341         if (rows.empty()) {
1342                 return;
1343         }
1344
1345         TreeView::Selection::ListHandle_Path::iterator i = rows.begin();
1346         TreeIter iter;
1347
1348         /* selection mode is single, so rows.begin() is it */
1349
1350         if ((iter = group_model->get_iter (*i))) {
1351
1352                 RouteGroup* rg = (*iter)[group_columns.group];
1353
1354                 if (rg) {
1355                         _session->remove_route_group (*rg);
1356                 }
1357         }
1358 }
1359
1360 void
1361 Mixer_UI::route_group_property_changed (RouteGroup* group, const PropertyChange& change)
1362 {
1363         if (in_group_row_change) {
1364                 return;
1365         }
1366
1367         /* force an update of any mixer strips that are using this group,
1368            otherwise mix group names don't change in mixer strips
1369         */
1370
1371         for (list<MixerStrip *>::iterator i = strips.begin(); i != strips.end(); ++i) {
1372                 if ((*i)->route_group() == group) {
1373                         (*i)->route_group_changed();
1374                 }
1375         }
1376
1377         TreeModel::iterator i;
1378         TreeModel::Children rows = group_model->children();
1379         Glib::RefPtr<TreeSelection> selection = group_display.get_selection();
1380
1381         in_group_row_change = true;
1382
1383         for (i = rows.begin(); i != rows.end(); ++i) {
1384                 if ((*i)[group_columns.group] == group) {
1385                         (*i)[group_columns.visible] = !group->is_hidden ();
1386                         (*i)[group_columns.text] = group->name ();
1387                         break;
1388                 }
1389         }
1390
1391         in_group_row_change = false;
1392
1393         if (change.contains (Properties::name)) {
1394                 _group_tabs->set_dirty ();
1395         }
1396
1397         for (list<MixerStrip*>::iterator j = strips.begin(); j != strips.end(); ++j) {
1398                 if ((*j)->route_group() == group) {
1399                         if (group->is_hidden ()) {
1400                                 hide_strip (*j);
1401                         } else {
1402                                 show_strip (*j);
1403                         }
1404                 }
1405         }
1406 }
1407
1408 void
1409 Mixer_UI::route_group_name_edit (const std::string& path, const std::string& new_text)
1410 {
1411         RouteGroup* group;
1412         TreeIter iter;
1413
1414         if ((iter = group_model->get_iter (path))) {
1415
1416                 if ((group = (*iter)[group_columns.group]) == 0) {
1417                         return;
1418                 }
1419
1420                 if (new_text != group->name()) {
1421                         group->set_name (new_text);
1422                 }
1423         }
1424 }
1425
1426 void
1427 Mixer_UI::route_group_row_change (const Gtk::TreeModel::Path&, const Gtk::TreeModel::iterator& iter)
1428 {
1429         RouteGroup* group;
1430
1431         if (in_group_row_change) {
1432                 return;
1433         }
1434
1435         if ((group = (*iter)[group_columns.group]) == 0) {
1436                 return;
1437         }
1438
1439         std::string name = (*iter)[group_columns.text];
1440
1441         if (name != group->name()) {
1442                 group->set_name (name);
1443         }
1444
1445         bool hidden = !(*iter)[group_columns.visible];
1446
1447         if (hidden != group->is_hidden ()) {
1448                 group->set_hidden (hidden, this);
1449         }
1450 }
1451
1452 /** Called when a group model row is deleted, but also when the model is
1453  *  reordered by a user drag-and-drop; the latter is what we are
1454  *  interested in here.
1455  */
1456 void
1457 Mixer_UI::route_group_row_deleted (Gtk::TreeModel::Path const &)
1458 {
1459         if (_in_group_rebuild_or_clear) {
1460                 return;
1461         }
1462
1463         /* Re-write the session's route group list so that the new order is preserved */
1464
1465         list<RouteGroup*> new_list;
1466
1467         Gtk::TreeModel::Children children = group_model->children();
1468         for (Gtk::TreeModel::Children::iterator i = children.begin(); i != children.end(); ++i) {
1469                 RouteGroup* g = (*i)[group_columns.group];
1470                 if (g) {
1471                         new_list.push_back (g);
1472                 }
1473         }
1474
1475         _session->reorder_route_groups (new_list);
1476 }
1477
1478
1479 void
1480 Mixer_UI::add_route_group (RouteGroup* group)
1481 {
1482         ENSURE_GUI_THREAD (*this, &Mixer_UI::add_route_group, group)
1483         bool focus = false;
1484
1485         in_group_row_change = true;
1486
1487         TreeModel::Row row = *(group_model->append());
1488         row[group_columns.visible] = !group->is_hidden ();
1489         row[group_columns.group] = group;
1490         if (!group->name().empty()) {
1491                 row[group_columns.text] = group->name();
1492         } else {
1493                 row[group_columns.text] = _("unnamed");
1494                 focus = true;
1495         }
1496
1497         group->PropertyChanged.connect (*this, invalidator (*this), boost::bind (&Mixer_UI::route_group_property_changed, this, group, _1), gui_context());
1498
1499         if (focus) {
1500                 TreeViewColumn* col = group_display.get_column (0);
1501                 CellRendererText* name_cell = dynamic_cast<CellRendererText*>(group_display.get_column_cell_renderer (0));
1502                 group_display.set_cursor (group_model->get_path (row), *col, *name_cell, true);
1503         }
1504
1505         _group_tabs->set_dirty ();
1506
1507         in_group_row_change = false;
1508 }
1509
1510 bool
1511 Mixer_UI::strip_scroller_button_release (GdkEventButton* ev)
1512 {
1513         using namespace Menu_Helpers;
1514
1515         if (Keyboard::is_context_menu_event (ev)) {
1516                 ARDOUR_UI::instance()->add_route (this);
1517                 return true;
1518         }
1519
1520         return false;
1521 }
1522
1523 void
1524 Mixer_UI::set_strip_width (Width w, bool save)
1525 {
1526         _strip_width = w;
1527
1528         for (list<MixerStrip*>::iterator i = strips.begin(); i != strips.end(); ++i) {
1529                 (*i)->set_width_enum (w, save ? (*i)->width_owner() : this);
1530         }
1531 }
1532
1533 void
1534 Mixer_UI::set_window_pos_and_size ()
1535 {
1536         resize (m_width, m_height);
1537         move (m_root_x, m_root_y);
1538 }
1539
1540         void
1541 Mixer_UI::get_window_pos_and_size ()
1542 {
1543         get_position(m_root_x, m_root_y);
1544         get_size(m_width, m_height);
1545 }
1546
1547 int
1548 Mixer_UI::set_state (const XMLNode& node)
1549 {
1550         const XMLProperty* prop;
1551         XMLNode* geometry;
1552
1553         m_width = default_width;
1554         m_height = default_height;
1555         m_root_x = 1;
1556         m_root_y = 1;
1557
1558         if ((geometry = find_named_node (node, "geometry")) != 0) {
1559
1560                 XMLProperty* prop;
1561
1562                 if ((prop = geometry->property("x_size")) == 0) {
1563                         prop = geometry->property ("x-size");
1564                 }
1565                 if (prop) {
1566                         m_width = atoi(prop->value());
1567                 }
1568                 if ((prop = geometry->property("y_size")) == 0) {
1569                         prop = geometry->property ("y-size");
1570                 }
1571                 if (prop) {
1572                         m_height = atoi(prop->value());
1573                 }
1574
1575                 if ((prop = geometry->property ("x_pos")) == 0) {
1576                         prop = geometry->property ("x-pos");
1577                 }
1578                 if (prop) {
1579                         m_root_x = atoi (prop->value());
1580
1581                 }
1582                 if ((prop = geometry->property ("y_pos")) == 0) {
1583                         prop = geometry->property ("y-pos");
1584                 }
1585                 if (prop) {
1586                         m_root_y = atoi (prop->value());
1587                 }
1588         }
1589
1590         set_window_pos_and_size ();
1591
1592         if ((prop = node.property ("narrow-strips"))) {
1593                 if (string_is_affirmative (prop->value())) {
1594                         set_strip_width (Narrow);
1595                 } else {
1596                         set_strip_width (Wide);
1597                 }
1598         }
1599
1600         if ((prop = node.property ("show-mixer"))) {
1601                 if (string_is_affirmative (prop->value())) {
1602                        _visible = true;
1603                 }
1604         }
1605
1606         if ((prop = node.property ("maximised"))) {
1607                 bool yn = string_is_affirmative (prop->value());
1608                 Glib::RefPtr<Action> act = ActionManager::get_action (X_("Common"), X_("ToggleMaximalMixer"));
1609                 assert (act);
1610                 Glib::RefPtr<ToggleAction> tact = Glib::RefPtr<ToggleAction>::cast_dynamic(act);
1611                 bool fs = tact && tact->get_active();
1612                 if (yn ^ fs) {
1613                         ActionManager::do_action ("Common",
1614                                         "ToggleMaximalMixer");
1615                 }
1616         }
1617
1618
1619         return 0;
1620 }
1621
1622 XMLNode&
1623 Mixer_UI::get_state (void)
1624 {
1625         XMLNode* node = new XMLNode ("Mixer");
1626
1627         if (is_realized()) {
1628                 Glib::RefPtr<Gdk::Window> win = get_window();
1629
1630                 get_window_pos_and_size ();
1631
1632                 XMLNode* geometry = new XMLNode ("geometry");
1633                 char buf[32];
1634                 snprintf(buf, sizeof(buf), "%d", m_width);
1635                 geometry->add_property(X_("x_size"), string(buf));
1636                 snprintf(buf, sizeof(buf), "%d", m_height);
1637                 geometry->add_property(X_("y_size"), string(buf));
1638                 snprintf(buf, sizeof(buf), "%d", m_root_x);
1639                 geometry->add_property(X_("x_pos"), string(buf));
1640                 snprintf(buf, sizeof(buf), "%d", m_root_y);
1641                 geometry->add_property(X_("y_pos"), string(buf));
1642
1643                 // written only for compatibility, they are not used.
1644                 snprintf(buf, sizeof(buf), "%d", 0);
1645                 geometry->add_property(X_("x_off"), string(buf));
1646                 snprintf(buf, sizeof(buf), "%d", 0);
1647                 geometry->add_property(X_("y_off"), string(buf));
1648
1649                 snprintf(buf,sizeof(buf), "%d",gtk_paned_get_position (static_cast<Paned*>(&rhs_pane1)->gobj()));
1650                 geometry->add_property(X_("mixer_rhs_pane1_pos"), string(buf));
1651                 snprintf(buf,sizeof(buf), "%d",gtk_paned_get_position (static_cast<Paned*>(&list_hpane)->gobj()));
1652                 geometry->add_property(X_("mixer_list_hpane_pos"), string(buf));
1653
1654                 node->add_child_nocopy (*geometry);
1655         }
1656
1657         node->add_property ("narrow-strips", _strip_width == Narrow ? "yes" : "no");
1658
1659         node->add_property ("show-mixer", _visible ? "yes" : "no");
1660
1661         node->add_property ("maximised", _maximised ? "yes" : "no");
1662
1663         return *node;
1664 }
1665
1666
1667 void
1668 Mixer_UI::pane_allocation_handler (Allocation&, Gtk::Paned* which)
1669 {
1670         int pos;
1671         XMLProperty* prop = 0;
1672         char buf[32];
1673         XMLNode* node = ARDOUR_UI::instance()->mixer_settings();
1674         XMLNode* geometry;
1675         int height;
1676         static int32_t done[3] = { 0, 0, 0 };
1677
1678         height = default_height;
1679
1680         if ((geometry = find_named_node (*node, "geometry")) != 0) {
1681
1682                 if ((prop = geometry->property ("y_size")) == 0) {
1683                         prop = geometry->property ("y-size");
1684                 }
1685                 if (prop) {
1686                         height = atoi (prop->value());
1687                 }
1688         }
1689
1690         if (which == static_cast<Gtk::Paned*> (&rhs_pane1)) {
1691
1692                 if (done[0]) {
1693                         return;
1694                 }
1695
1696                 if (!geometry || (prop = geometry->property("mixer-rhs-pane1-pos")) == 0) {
1697                         pos = height / 3;
1698                         snprintf (buf, sizeof(buf), "%d", pos);
1699                 } else {
1700                         pos = atoi (prop->value());
1701                 }
1702
1703                 if ((done[0] = GTK_WIDGET(rhs_pane1.gobj())->allocation.height > pos)) {
1704                         rhs_pane1.set_position (pos);
1705                 }
1706
1707         } else if (which == static_cast<Gtk::Paned*> (&list_hpane)) {
1708
1709                 if (done[2]) {
1710                         return;
1711                 }
1712
1713                 if (!geometry || (prop = geometry->property("mixer-list-hpane-pos")) == 0) {
1714                         pos = 75;
1715                         snprintf (buf, sizeof(buf), "%d", pos);
1716                 } else {
1717                         pos = atoi (prop->value());
1718                 }
1719
1720                 if ((done[2] = GTK_WIDGET(list_hpane.gobj())->allocation.width > pos)) {
1721                         list_hpane.set_position (pos);
1722                 }
1723         }
1724 }
1725 void
1726 Mixer_UI::scroll_left ()
1727 {
1728         if (!scroller.get_hscrollbar()) return;
1729         Adjustment* adj = scroller.get_hscrollbar()->get_adjustment();
1730         /* stupid GTK: can't rely on clamping across versions */
1731         scroller.get_hscrollbar()->set_value (max (adj->get_lower(), adj->get_value() - adj->get_step_increment()));
1732 }
1733
1734 void
1735 Mixer_UI::scroll_right ()
1736 {
1737         if (!scroller.get_hscrollbar()) return;
1738         Adjustment* adj = scroller.get_hscrollbar()->get_adjustment();
1739         /* stupid GTK: can't rely on clamping across versions */
1740         scroller.get_hscrollbar()->set_value (min (adj->get_upper(), adj->get_value() + adj->get_step_increment()));
1741 }
1742
1743 bool
1744 Mixer_UI::on_key_press_event (GdkEventKey* ev)
1745 {
1746         /* focus widget gets first shot, then bindings, otherwise
1747            forward to main window
1748         */
1749
1750         if (gtk_window_propagate_key_event (GTK_WINDOW(gobj()), ev)) {
1751                 return true;
1752         }
1753
1754         KeyboardKey k (ev->state, ev->keyval);
1755
1756         if (bindings.activate (k, Bindings::Press)) {
1757                 return true;
1758         }
1759
1760         return forward_key_press (ev);
1761 }
1762
1763 bool
1764 Mixer_UI::on_key_release_event (GdkEventKey* ev)
1765 {
1766         if (gtk_window_propagate_key_event (GTK_WINDOW(gobj()), ev)) {
1767                 return true;
1768         }
1769
1770         KeyboardKey k (ev->state, ev->keyval);
1771
1772         if (bindings.activate (k, Bindings::Release)) {
1773                 return true;
1774         }
1775
1776         /* don't forward releases */
1777
1778         return true;
1779 }
1780
1781 bool
1782 Mixer_UI::on_scroll_event (GdkEventScroll* ev)
1783 {
1784         switch (ev->direction) {
1785         case GDK_SCROLL_LEFT:
1786                 scroll_left ();
1787                 return true;
1788         case GDK_SCROLL_UP:
1789                 if (ev->state & Keyboard::TertiaryModifier) {
1790                         scroll_left ();
1791                         return true;
1792                 }
1793                 return false;
1794
1795         case GDK_SCROLL_RIGHT:
1796                 scroll_right ();
1797                 return true;
1798
1799         case GDK_SCROLL_DOWN:
1800                 if (ev->state & Keyboard::TertiaryModifier) {
1801                         scroll_right ();
1802                         return true;
1803                 }
1804                 return false;
1805         }
1806
1807         return false;
1808 }
1809
1810
1811 void
1812 Mixer_UI::parameter_changed (string const & p)
1813 {
1814         if (p == "show-group-tabs") {
1815                 bool const s = _session->config.get_show_group_tabs ();
1816                 if (s) {
1817                         _group_tabs->show ();
1818                 } else {
1819                         _group_tabs->hide ();
1820                 }
1821         } else if (p == "default-narrow_ms") {
1822                 bool const s = ARDOUR_UI::config()->get_default_narrow_ms ();
1823                 for (list<MixerStrip*>::iterator i = strips.begin(); i != strips.end(); ++i) {
1824                         (*i)->set_width_enum (s ? Narrow : Wide, this);
1825                 }
1826         } else if (p == "remote-model") {
1827                 reset_remote_control_ids ();
1828         }
1829 }
1830
1831 void
1832 Mixer_UI::set_route_group_activation (RouteGroup* g, bool a)
1833 {
1834         g->set_active (a, this);
1835 }
1836
1837 PluginSelector*
1838 Mixer_UI::plugin_selector()
1839 {
1840 #ifdef DEFER_PLUGIN_SELECTOR_LOAD
1841         if (!_plugin_selector)
1842                 _plugin_selector = new PluginSelector (PluginManager::instance());
1843 #endif
1844
1845         return _plugin_selector;
1846 }
1847
1848 void
1849 Mixer_UI::setup_track_display ()
1850 {
1851         track_model = ListStore::create (track_columns);
1852         track_display.set_model (track_model);
1853         track_display.append_column (_("Strips"), track_columns.text);
1854         track_display.append_column (_("Show"), track_columns.visible);
1855         track_display.get_column (0)->set_data (X_("colnum"), GUINT_TO_POINTER(0));
1856         track_display.get_column (1)->set_data (X_("colnum"), GUINT_TO_POINTER(1));
1857         track_display.get_column (0)->set_expand(true);
1858         track_display.get_column (1)->set_expand(false);
1859         track_display.get_column (0)->set_sizing (Gtk::TREE_VIEW_COLUMN_FIXED);
1860         track_display.set_name (X_("EditGroupList"));
1861         track_display.get_selection()->set_mode (Gtk::SELECTION_NONE);
1862         track_display.set_reorderable (true);
1863         track_display.set_headers_visible (true);
1864
1865         track_model->signal_row_deleted().connect (sigc::mem_fun (*this, &Mixer_UI::track_list_delete));
1866         track_model->signal_rows_reordered().connect (sigc::mem_fun (*this, &Mixer_UI::track_list_reorder));
1867
1868         CellRendererToggle* track_list_visible_cell = dynamic_cast<CellRendererToggle*>(track_display.get_column_cell_renderer (1));
1869         track_list_visible_cell->property_activatable() = true;
1870         track_list_visible_cell->property_radio() = false;
1871         track_list_visible_cell->signal_toggled().connect (sigc::mem_fun (*this, &Mixer_UI::track_visibility_changed));
1872
1873         track_display.signal_button_press_event().connect (sigc::mem_fun (*this, &Mixer_UI::track_display_button_press), false);
1874
1875         track_display_scroller.add (track_display);
1876         track_display_scroller.set_policy (Gtk::POLICY_NEVER, Gtk::POLICY_AUTOMATIC);
1877
1878         VBox* v = manage (new VBox);
1879         v->show ();
1880         v->pack_start (track_display_scroller, true, true);
1881
1882         Button* b = manage (new Button);
1883         b->show ();
1884         Widget* w = manage (new Image (Stock::ADD, ICON_SIZE_BUTTON));
1885         w->show ();
1886         b->add (*w);
1887
1888         b->signal_clicked().connect (sigc::mem_fun (*this, &Mixer_UI::new_track_or_bus));
1889
1890         v->pack_start (*b, false, false);
1891
1892         track_display_frame.set_name("BaseFrame");
1893         track_display_frame.set_shadow_type (Gtk::SHADOW_IN);
1894         track_display_frame.add (*v);
1895
1896         track_display_scroller.show();
1897         track_display_frame.show();
1898         track_display.show();
1899 }
1900
1901 void
1902 Mixer_UI::new_track_or_bus ()
1903 {
1904         ARDOUR_UI::instance()->add_route (this);
1905 }
1906
1907
1908 void
1909 Mixer_UI::update_title ()
1910 {
1911         if (_session) {
1912                 string n;
1913
1914                 if (_session->snap_name() != _session->name()) {
1915                         n = _session->snap_name ();
1916                 } else {
1917                         n = _session->name ();
1918                 }
1919
1920                 if (_session->dirty ()) {
1921                         n = "*" + n;
1922                 }
1923
1924                 WindowTitle title (n);
1925                 title += S_("Window|Mixer");
1926                 title += Glib::get_application_name ();
1927                 set_title (title.get_string());
1928
1929         } else {
1930
1931                 WindowTitle title (S_("Window|Mixer"));
1932                 title += Glib::get_application_name ();
1933                 set_title (title.get_string());
1934         }
1935 }
1936
1937 MixerStrip*
1938 Mixer_UI::strip_by_x (int x)
1939 {
1940         for (list<MixerStrip*>::iterator i = strips.begin(); i != strips.end(); ++i) {
1941                 int x1, x2, y;
1942
1943                 (*i)->translate_coordinates (*this, 0, 0, x1, y);
1944                 x2 = x1 + (*i)->get_width();
1945
1946                 if (x >= x1 && x <= x2) {
1947                         return (*i);
1948                 }
1949         }
1950
1951         return 0;
1952 }
1953
1954 void
1955 Mixer_UI::set_route_targets_for_operation ()
1956 {
1957         _route_targets.clear ();
1958
1959         if (!_selection.empty()) {
1960                 _route_targets = _selection.routes;
1961                 return;
1962         }
1963
1964 //  removed "implicit" selections of strips, after discussion on IRC
1965
1966 }
1967
1968 void
1969 Mixer_UI::monitor_section_going_away ()
1970 {
1971         if (_monitor_section) {
1972                 out_packer.remove (_monitor_section->tearoff());
1973                 _monitor_section->set_session (0);
1974         }
1975 }
1976
1977 void
1978 Mixer_UI::toggle_midi_input_active (bool flip_others)
1979 {
1980         boost::shared_ptr<RouteList> rl (new RouteList);
1981         bool onoff = false;
1982
1983         set_route_targets_for_operation ();
1984
1985         for (RouteUISelection::iterator r = _route_targets.begin(); r != _route_targets.end(); ++r) {
1986                 boost::shared_ptr<MidiTrack> mt = (*r)->midi_track();
1987
1988                 if (mt) {
1989                         rl->push_back ((*r)->route());
1990                         onoff = !mt->input_active();
1991                 }
1992         }
1993
1994         _session->set_exclusive_input_active (rl, onoff, flip_others);
1995 }
1996
1997 void
1998 Mixer_UI::maximise_mixer_space ()
1999 {
2000         if (_maximised) {
2001                 return;
2002         }
2003
2004         fullscreen ();
2005
2006         _maximised = true;
2007 }
2008
2009 void
2010 Mixer_UI::restore_mixer_space ()
2011 {
2012         if (!_maximised) {
2013                 return;
2014         }
2015
2016         unfullscreen();
2017
2018         _maximised = false;
2019 }