libs/surfaces/push2/mix.cc

   1 /*
   2   Copyright (C) 2016 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 #include <cairomm/region.h>
  20 #include <pangomm/layout.h>
  21
  22 #include "pbd/compose.h"
  23 #include "pbd/convert.h"
  24 #include "pbd/debug.h"
  25 #include "pbd/failed_constructor.h"
  26 #include "pbd/file_utils.h"
  27 #include "pbd/search_path.h"
  28 #include "pbd/enumwriter.h"
  29
  30 #include "midi++/parser.h"
  31 #include "timecode/time.h"
  32 #include "timecode/bbt_time.h"
  33
  34 #include "ardour/async_midi_port.h"
  35 #include "ardour/audioengine.h"
  36 #include "ardour/debug.h"
  37 #include "ardour/filesystem_paths.h"
  38 #include "ardour/midiport_manager.h"
  39 #include "ardour/midi_track.h"
  40 #include "ardour/midi_port.h"
  41 #include "ardour/session.h"
  42 #include "ardour/tempo.h"
  43 #include "ardour/utils.h"
  44 #include "ardour/vca_manager.h"
  45
  46 #include "canvas/colors.h"
  47 #include "canvas/line.h"
  48 #include "canvas/rectangle.h"
  49 #include "canvas/text.h"
  50
  51 #include "gtkmm2ext/gui_thread.h"
  52
  53 #include "canvas.h"
  54 #include "knob.h"
  55 #include "level_meter.h"
  56 #include "mix.h"
  57 #include "push2.h"
  58 #include "utils.h"
  59
  60 #include "pbd/i18n.h"
  61
  62 #ifdef __APPLE__
  63 #define Rect ArdourCanvas::Rect
  64 #endif
  65
  66 using namespace ARDOUR;
  67 using namespace std;
  68 using namespace PBD;
  69 using namespace Glib;
  70 using namespace ArdourSurface;
  71 using namespace ArdourCanvas;
  72
  73 MixLayout::MixLayout (Push2& p, Session & s, std::string const & name)
  74         : Push2Layout (p, s, name)
  75         , bank_start (0)
  76         , vpot_mode (Volume)
  77 {
  78         /* background */
  79
  80         bg = new ArdourCanvas::Rectangle (this);
  81         bg->set (Rect (0, 0, display_width(), display_height()));
  82         bg->set_fill_color (p2.get_color (Push2::DarkBackground));
  83
  84         /* upper line */
  85
  86         upper_line = new Line (this);
  87         upper_line->set (Duple (0, 22.5), Duple (display_width(), 22.5));
  88         upper_line->set_outline_color (p2.get_color (Push2::LightBackground));
  89
  90         Pango::FontDescription fd2 ("Sans 10");
  91
  92         for (int n = 0; n < 8; ++n) {
  93
  94                 /* background for text labels for knob function */
  95
  96                 ArdourCanvas::Rectangle* r = new ArdourCanvas::Rectangle (this);
  97                 Coord x0 = 10 + (n*Push2Canvas::inter_button_spacing()) - 5;
  98                 r->set (Rect (x0, 2, x0 + Push2Canvas::inter_button_spacing(), 2 + 21));
  99                 upper_backgrounds.push_back (r);
 100
 101                 r = new ArdourCanvas::Rectangle (this);
 102                 r->set (Rect (x0, 137, x0 + Push2Canvas::inter_button_spacing(), 137 + 21));
 103                 lower_backgrounds.push_back (r);
 104
 105                 /* text labels for knob function*/
 106
 107                 Text* t = new Text (this);
 108                 t->set_font_description (fd2);
 109                 t->set_color (p2.get_color (Push2::ParameterName));
 110                 t->set_position (Duple (10 + (n*Push2Canvas::inter_button_spacing()), 5));
 111
 112                 string txt;
 113                 switch (n) {
 114                 case 0:
 115                         txt = _("Volumes");
 116                         break;
 117                 case 1:
 118                         txt = _("Pans");
 119                         break;
 120                 case 2:
 121                         txt = _("Pan Widths");
 122                         break;
 123                 case 3:
 124                         txt = _("A Sends");
 125                         break;
 126                 case 4:
 127                         txt = _("B Sends");
 128                         break;
 129                 case 5:
 130                         txt = _("C Sends");
 131                         break;
 132                 case 6:
 133                         txt = _("D Sends");
 134                         break;
 135                 case 7:
 136                         txt = _("E Sends");
 137                         break;
 138                 }
 139                 t->set (txt);
 140                 upper_text.push_back (t);
 141
 142                 /* GainMeters */
 143
 144                 gain_meter[n] = new GainMeter (this, p2);
 145                 gain_meter[n]->set_position (Duple (40 + (n * Push2Canvas::inter_button_spacing()), 95));
 146
 147                 /* stripable names */
 148
 149                 t = new Text (this);
 150                 t->set_font_description (fd2);
 151                 t->set_color (p2.get_color (Push2::ParameterName));
 152                 t->set_position (Duple (10 + (n*Push2Canvas::inter_button_spacing()), 140));
 153                 lower_text.push_back (t);
 154
 155         }
 156
 157         mode_button = p2.button_by_id (Push2::Upper1);
 158
 159         session.RouteAdded.connect (session_connections, invalidator(*this), boost::bind (&MixLayout::stripables_added, this), &p2);
 160         session.vca_manager().VCAAdded.connect (session_connections, invalidator (*this), boost::bind (&MixLayout::stripables_added, this), &p2);
 161 }
 162
 163 MixLayout::~MixLayout ()
 164 {
 165         // Item destructor deletes all children
 166 }
 167
 168 void
 169 MixLayout::show ()
 170 {
 171         Push2::ButtonID upper_buttons[] = { Push2::Upper1, Push2::Upper2, Push2::Upper3, Push2::Upper4,
 172                                             Push2::Upper5, Push2::Upper6, Push2::Upper7, Push2::Upper8 };
 173
 174
 175         for (size_t n = 0; n < sizeof (upper_buttons) / sizeof (upper_buttons[0]); ++n) {
 176                 Push2::Button* b = p2.button_by_id (upper_buttons[n]);
 177
 178                 if (b != mode_button) {
 179                         b->set_color (Push2::LED::DarkGray);
 180                 } else {
 181                         b->set_color (Push2::LED::White);
 182                 }
 183                 b->set_state (Push2::LED::OneShot24th);
 184                 p2.write (b->state_msg());
 185         }
 186
 187         switch_bank (bank_start);
 188
 189         Container::show ();
 190 }
 191
 192 void
 193 MixLayout::render (Rect const& area, Cairo::RefPtr<Cairo::Context> context) const
 194 {
 195         Container::render (area, context);
 196 }
 197
 198 void
 199 MixLayout::button_upper (uint32_t n)
 200 {
 201         Push2::Button* b;
 202         switch (n) {
 203         case 0:
 204                 vpot_mode = Volume;
 205                 b = p2.button_by_id (Push2::Upper1);
 206                 break;
 207         case 1:
 208                 vpot_mode = PanAzimuth;
 209                 b = p2.button_by_id (Push2::Upper2);
 210                 break;
 211         case 2:
 212                 vpot_mode = PanWidth;
 213                 b = p2.button_by_id (Push2::Upper3);
 214                 break;
 215         case 3:
 216                 vpot_mode = Send1;
 217                 b = p2.button_by_id (Push2::Upper4);
 218                 break;
 219         case 4:
 220                 vpot_mode = Send2;
 221                 b = p2.button_by_id (Push2::Upper5);
 222                 break;
 223         case 5:
 224                 vpot_mode = Send3;
 225                 b = p2.button_by_id (Push2::Upper6);
 226                 break;
 227         case 6:
 228                 vpot_mode = Send4;
 229                 b = p2.button_by_id (Push2::Upper7);
 230                 break;
 231         case 7:
 232                 vpot_mode = Send5;
 233                 b = p2.button_by_id (Push2::Upper8);
 234                 break;
 235         }
 236
 237         if (b != mode_button) {
 238                 mode_button->set_color (Push2::LED::Black);
 239                 mode_button->set_state (Push2::LED::OneShot24th);
 240                 p2.write (mode_button->state_msg());
 241         }
 242
 243         mode_button = b;
 244
 245         show_vpot_mode ();
 246 }
 247
 248 void
 249 MixLayout::show_vpot_mode ()
 250 {
 251         mode_button->set_color (Push2::LED::White);
 252         mode_button->set_state (Push2::LED::OneShot24th);
 253         p2.write (mode_button->state_msg());
 254
 255         for (int s = 0; s < 8; ++s) {
 256                 upper_backgrounds[s]->hide ();
 257                 upper_text[s]->set_color (p2.get_color (Push2::ParameterName));
 258         }
 259
 260         uint32_t n = 0;
 261
 262         boost::shared_ptr<AutomationControl> ac;
 263         switch (vpot_mode) {
 264         case Volume:
 265                 for (int s = 0; s < 8; ++s) {
 266                         if (stripable[s]) {
 267                                 gain_meter[s]->knob->set_controllable (stripable[s]->gain_control());
 268                                 boost::shared_ptr<PeakMeter> pm = stripable[s]->peak_meter();
 269                                 if (pm) {
 270                                         gain_meter[s]->meter->set_meter (pm.get());
 271                                 } else {
 272                                         gain_meter[s]->meter->set_meter (0);
 273                                 }
 274                         } else {
 275                                 gain_meter[s]->knob->set_controllable (boost::shared_ptr<AutomationControl>());
 276                                 gain_meter[s]->meter->set_meter (0);
 277                         }
 278                         gain_meter[s]->knob->remove_flag (Push2Knob::ArcToZero);
 279                         gain_meter[s]->meter->show ();
 280                 }
 281                 n = 0;
 282                 break;
 283         case PanAzimuth:
 284                 for (int s = 0; s < 8; ++s) {
 285                         if (stripable[s]) {
 286                                 gain_meter[s]->knob->set_controllable (stripable[s]->pan_azimuth_control());
 287                                 gain_meter[s]->knob->add_flag (Push2Knob::ArcToZero);
 288                         } else {
 289                                 gain_meter[s]->knob->set_controllable (boost::shared_ptr<AutomationControl>());
 290
 291                         }
 292                         gain_meter[s]->meter->hide ();
 293                 }
 294                 n = 1;
 295                 break;
 296         case PanWidth:
 297                 for (int s = 0; s < 8; ++s) {
 298                         if (stripable[s]) {
 299                                 gain_meter[s]->knob->set_controllable (stripable[s]->pan_width_control());
 300                         } else {
 301                                 gain_meter[s]->knob->set_controllable (boost::shared_ptr<AutomationControl>());
 302
 303                         }
 304                         gain_meter[s]->knob->remove_flag (Push2Knob::ArcToZero);
 305                         gain_meter[s]->meter->hide ();
 306                 }
 307                 n = 2;
 308                 break;
 309         case Send1:
 310                 for (int s = 0; s < 8; ++s) {
 311                         if (stripable[s]) {
 312                                 gain_meter[s]->knob->set_controllable (stripable[s]->send_level_controllable (0));
 313                         } else {
 314                                 gain_meter[s]->knob->set_controllable (boost::shared_ptr<AutomationControl>());
 315
 316                         }
 317                         gain_meter[s]->knob->remove_flag (Push2Knob::ArcToZero);
 318                         gain_meter[s]->meter->hide ();
 319                 }
 320                 n = 3;
 321                 break;
 322         case Send2:
 323                 for (int s = 0; s < 8; ++s) {
 324                         if (stripable[s]) {
 325                                 gain_meter[s]->knob->set_controllable (stripable[s]->send_level_controllable (1));
 326                         } else {
 327                                 gain_meter[s]->knob->set_controllable (boost::shared_ptr<AutomationControl>());
 328
 329                         }
 330                         gain_meter[s]->knob->remove_flag (Push2Knob::ArcToZero);
 331                         gain_meter[s]->meter->hide ();
 332                 }
 333                 n = 4;
 334                 break;
 335         case Send3:
 336                 for (int s = 0; s < 8; ++s) {
 337                         if (stripable[s]) {
 338                                 gain_meter[s]->knob->set_controllable (stripable[s]->send_level_controllable (2));
 339                         } else {
 340                                 gain_meter[s]->knob->set_controllable (boost::shared_ptr<AutomationControl>());
 341
 342                         }
 343                         gain_meter[s]->knob->remove_flag (Push2Knob::ArcToZero);
 344                         gain_meter[s]->meter->hide ();
 345                 }
 346                 n = 5;
 347                 break;
 348         case Send4:
 349                 for (int s = 0; s < 8; ++s) {
 350                         if (stripable[s]) {
 351                                 gain_meter[s]->knob->set_controllable (stripable[s]->send_level_controllable (3));
 352                         } else {
 353                                 gain_meter[s]->knob->set_controllable (boost::shared_ptr<AutomationControl>());
 354
 355                         }
 356                         gain_meter[s]->knob->remove_flag (Push2Knob::ArcToZero);
 357                         gain_meter[s]->meter->hide ();
 358                 }
 359                 n = 6;
 360                 break;
 361         case Send5:
 362                 for (int s = 0; s < 8; ++s) {
 363                         if (stripable[s]) {
 364                                 gain_meter[s]->knob->set_controllable (stripable[s]->send_level_controllable (4));
 365                         } else {
 366                                 gain_meter[s]->knob->set_controllable (boost::shared_ptr<AutomationControl>());
 367
 368                         }
 369                         gain_meter[s]->knob->remove_flag (Push2Knob::ArcToZero);
 370                         gain_meter[s]->meter->hide ();
 371                 }
 372                 n = 7;
 373                 break;
 374         default:
 375                 break;
 376         }
 377
 378         upper_backgrounds[n]->set_fill_color (p2.get_color (Push2::ParameterName));
 379         upper_backgrounds[n]->set_outline_color (p2.get_color (Push2::ParameterName));
 380         upper_backgrounds[n]->show ();
 381         upper_text[n]->set_color (contrasting_text_color (p2.get_color (Push2::ParameterName)));
 382 }
 383
 384 void
 385 MixLayout::button_mute ()
 386 {
 387         boost::shared_ptr<Stripable> s = ControlProtocol::first_selected_stripable();
 388         if (s) {
 389                 boost::shared_ptr<AutomationControl> ac = s->mute_control();
 390                 if (ac) {
 391                         ac->set_value (!ac->get_value(), PBD::Controllable::UseGroup);
 392                 }
 393         }
 394 }
 395
 396 void
 397 MixLayout::button_solo ()
 398 {
 399         boost::shared_ptr<Stripable> s = ControlProtocol::first_selected_stripable();
 400         if (s) {
 401                 boost::shared_ptr<AutomationControl> ac = s->solo_control();
 402                 if (ac) {
 403                         session.set_control (ac, !ac->get_value(), PBD::Controllable::UseGroup);
 404                 }
 405         }
 406 }
 407
 408 void
 409 MixLayout::button_lower (uint32_t n)
 410 {
 411         if (!stripable[n]) {
 412                 return;
 413         }
 414
 415         ControlProtocol::SetStripableSelection (stripable[n]);
 416 }
 417
 418 void
 419 MixLayout::strip_vpot (int n, int delta)
 420 {
 421         boost::shared_ptr<Controllable> ac = gain_meter[n]->knob->controllable();
 422
 423         if (ac) {
 424                 ac->set_value (ac->interface_to_internal (
 425                                        min (ac->upper(), max (ac->lower(), ac->internal_to_interface (ac->get_value()) + (delta/256.0)))),
 426                                PBD::Controllable::UseGroup);
 427         }
 428 }
 429
 430 void
 431 MixLayout::strip_vpot_touch (int n, bool touching)
 432 {
 433         if (stripable[n]) {
 434                 boost::shared_ptr<AutomationControl> ac = stripable[n]->gain_control();
 435                 if (ac) {
 436                         if (touching) {
 437                                 ac->start_touch (session.audible_frame());
 438                         } else {
 439                                 ac->stop_touch (true, session.audible_frame());
 440                         }
 441                 }
 442         }
 443 }
 444
 445 void
 446 MixLayout::stripable_property_change (PropertyChange const& what_changed, uint32_t which)
 447 {
 448         if (what_changed.contains (Properties::color)) {
 449                 lower_backgrounds[which]->set_fill_color (stripable[which]->presentation_info().color());
 450
 451                 if (stripable[which]->presentation_info().selected()) {
 452                         lower_text[which]->set_fill_color (contrasting_text_color (stripable[which]->presentation_info().color()));
 453                         /* might not be a MIDI track, in which case this will
 454                            do nothing
 455                         */
 456                         p2.update_selection_color ();
 457                 }
 458         }
 459
 460         if (what_changed.contains (Properties::hidden)) {
 461                 switch_bank (bank_start);
 462         }
 463
 464         if (what_changed.contains (Properties::selected)) {
 465
 466                 if (!stripable[which]) {
 467                         return;
 468                 }
 469
 470                 if (stripable[which]->presentation_info().selected()) {
 471                         show_selection (which);
 472                 } else {
 473                         hide_selection (which);
 474                 }
 475         }
 476
 477 }
 478
 479 void
 480 MixLayout::show_selection (uint32_t n)
 481 {
 482         lower_backgrounds[n]->show ();
 483         lower_backgrounds[n]->set_fill_color (stripable[n]->presentation_info().color());
 484         lower_text[n]->set_color (ArdourCanvas::contrasting_text_color (lower_backgrounds[n]->fill_color()));
 485 }
 486
 487 void
 488 MixLayout::hide_selection (uint32_t n)
 489 {
 490         lower_backgrounds[n]->hide ();
 491         if (stripable[n]) {
 492                 lower_text[n]->set_color (stripable[n]->presentation_info().color());
 493         }
 494 }
 495
 496 void
 497 MixLayout::solo_changed (uint32_t n)
 498 {
 499         solo_mute_changed (n);
 500 }
 501
 502 void
 503 MixLayout::mute_changed (uint32_t n)
 504 {
 505         solo_mute_changed (n);
 506 }
 507
 508 void
 509 MixLayout::solo_mute_changed (uint32_t n)
 510 {
 511         string shortname = short_version (stripable[n]->name(), 10);
 512         string text;
 513         boost::shared_ptr<AutomationControl> ac;
 514         ac = stripable[n]->solo_control();
 515         if (ac && ac->get_value()) {
 516                 text += "* ";
 517         }
 518         boost::shared_ptr<MuteControl> mc;
 519         mc = stripable[n]->mute_control ();
 520         if (mc) {
 521                 if (mc->muted_by_self_or_masters()) {
 522                         text += "! ";
 523                 } else if (mc->muted_by_others_soloing()) {
 524                         text += "- "; // it would be nice to use Unicode mute"\uD83D\uDD07 ";
 525                 }
 526         }
 527         text += shortname;
 528         lower_text[n]->set (text);
 529 }
 530
 531 void
 532 MixLayout::switch_bank (uint32_t base)
 533 {
 534         stripable_connections.drop_connections ();
 535
 536         /* work backwards so we can tell if we should actually switch banks */
 537
 538         boost::shared_ptr<Stripable> s[8];
 539         uint32_t different = 0;
 540
 541         for (int n = 0; n < 8; ++n) {
 542                 s[n] = session.get_remote_nth_stripable (base+n, PresentationInfo::Flag (PresentationInfo::Route|PresentationInfo::VCA));
 543                 if (s[n] != stripable[n]) {
 544                         different++;
 545                 }
 546         }
 547
 548         if (!s[0]) {
 549                 /* not even the first stripable exists, do nothing */
 550                 for (int n = 0; n < 8; ++n) {
 551                         stripable[n].reset ();
 552                         gain_meter[n]->knob->set_controllable (boost::shared_ptr<AutomationControl>());
 553                         gain_meter[n]->meter->set_meter (0);
 554                 }
 555                 return;
 556         }
 557
 558         for (int n = 0; n < 8; ++n) {
 559                 stripable[n] = s[n];
 560         }
 561
 562         /* at least one stripable in this bank */
 563
 564         bank_start = base;
 565
 566         for (int n = 0; n < 8; ++n) {
 567
 568                 if (!stripable[n]) {
 569                         lower_text[n]->hide ();
 570                         hide_selection (n);
 571                         gain_meter[n]->knob->set_controllable (boost::shared_ptr<AutomationControl>());
 572                         gain_meter[n]->meter->set_meter (0);
 573                 } else {
 574
 575                         lower_text[n]->show ();
 576
 577                         /* stripable goes away? refill the bank, starting at the same point */
 578
 579                         stripable[n]->DropReferences.connect (stripable_connections, invalidator (*this), boost::bind (&MixLayout::switch_bank, this, bank_start), &p2);
 580                         stripable[n]->presentation_info().PropertyChanged.connect (stripable_connections, invalidator (*this), boost::bind (&MixLayout::stripable_property_change, this, _1, n), &p2);
 581                         stripable[n]->solo_control()->Changed.connect (stripable_connections, invalidator (*this), boost::bind (&MixLayout::solo_changed, this, n), &p2);
 582                         stripable[n]->mute_control()->Changed.connect (stripable_connections, invalidator (*this), boost::bind (&MixLayout::mute_changed, this, n), &p2);
 583
 584                         if (stripable[n]->presentation_info().selected()) {
 585                                 show_selection (n);
 586                         } else {
 587                                 hide_selection (n);
 588                         }
 589
 590                         /* this will set lower text to the correct value (basically
 591                            the stripable name)
 592                         */
 593
 594                         solo_mute_changed (n);
 595
 596                         gain_meter[n]->knob->set_text_color (stripable[n]->presentation_info().color());
 597                         gain_meter[n]->knob->set_arc_start_color (stripable[n]->presentation_info().color());
 598                         gain_meter[n]->knob->set_arc_end_color (stripable[n]->presentation_info().color());
 599                 }
 600
 601
 602                 Push2::Button* b;
 603
 604                 switch (n) {
 605                 case 0:
 606                         b = p2.button_by_id (Push2::Lower1);
 607                         break;
 608                 case 1:
 609                         b = p2.button_by_id (Push2::Lower2);
 610                         break;
 611                 case 2:
 612                         b = p2.button_by_id (Push2::Lower3);
 613                         break;
 614                 case 3:
 615                         b = p2.button_by_id (Push2::Lower4);
 616                         break;
 617                 case 4:
 618                         b = p2.button_by_id (Push2::Lower5);
 619                         break;
 620                 case 5:
 621                         b = p2.button_by_id (Push2::Lower6);
 622                         break;
 623                 case 6:
 624                         b = p2.button_by_id (Push2::Lower7);
 625                         break;
 626                 case 7:
 627                         b = p2.button_by_id (Push2::Lower8);
 628                         break;
 629                 }
 630
 631                 if (stripable[n]) {
 632                         b->set_color (p2.get_color_index (stripable[n]->presentation_info().color()));
 633                 } else {
 634                         b->set_color (Push2::LED::Black);
 635                 }
 636
 637                 b->set_state (Push2::LED::OneShot24th);
 638                 p2.write (b->state_msg());
 639         }
 640
 641         show_vpot_mode ();
 642 }
 643
 644 void
 645 MixLayout::button_right ()
 646 {
 647         switch_bank (max (0, bank_start + 8));
 648 }
 649
 650 void
 651 MixLayout::button_left ()
 652 {
 653         switch_bank (max (0, bank_start - 8));
 654 }
 655
 656
 657 void
 658 MixLayout::button_select_press ()
 659 {
 660 }
 661
 662 void
 663 MixLayout::button_select_release ()
 664 {
 665         if (!(p2.modifier_state() & Push2::ModSelect)) {
 666                 /* somebody else used us as a modifier */
 667                 return;
 668         }
 669
 670         int selected = -1;
 671
 672         for (int n = 0; n < 8; ++n) {
 673                 if (stripable[n]) {
 674                         if (stripable[n]->presentation_info().selected()) {
 675                                         selected = n;
 676                                         break;
 677                         }
 678                 }
 679         }
 680
 681         if (selected < 0) {
 682
 683                 /* no visible track selected, select first (if any) */
 684
 685                 if (stripable[0]) {
 686                         ControlProtocol::SetStripableSelection (stripable[0]);
 687                 }
 688
 689         } else {
 690
 691                 if (p2.modifier_state() & Push2::ModShift) {
 692                         /* select prev */
 693
 694                         if (selected == 0) {
 695                                 /* current selected is leftmost ... cancel selection,
 696                                    switch banks by one, and select leftmost
 697                                 */
 698                                 if (bank_start != 0) {
 699                                         ControlProtocol::ClearStripableSelection ();
 700                                         switch_bank (bank_start-1);
 701                                         if (stripable[0]) {
 702                                                 ControlProtocol::SetStripableSelection (stripable[0]);
 703                                         }
 704                                 }
 705                         } else {
 706                                 /* select prev, if any */
 707                                 int n = selected - 1;
 708                                 while (n >= 0 && !stripable[n]) {
 709                                         --n;
 710                                 }
 711                                 if (n >= 0) {
 712                                         ControlProtocol::SetStripableSelection (stripable[n]);
 713                                 }
 714                         }
 715
 716                 } else {
 717
 718                         /* select next */
 719
 720                         if (selected == 7) {
 721                                 /* current selected is rightmost ... cancel selection,
 722                                    switch banks by one, and select righmost
 723                                 */
 724                                 ControlProtocol::ToggleStripableSelection (stripable[selected]);
 725                                 switch_bank (bank_start+1);
 726                                 if (stripable[7]) {
 727                                         ControlProtocol::SetStripableSelection (stripable[7]);
 728                                 }
 729                         } else {
 730                                 /* select next, if any */
 731                                 int n = selected + 1;
 732                                 while (n < 8 && !stripable[n]) {
 733                                         ++n;
 734                                 }
 735
 736                                 if (n != 8) {
 737                                         ControlProtocol::SetStripableSelection (stripable[n]);
 738                                 }
 739                         }
 740                 }
 741         }
 742 }
 743
 744 void
 745 MixLayout::stripables_added ()
 746 {
 747         /* reload current bank */
 748         switch_bank (bank_start);
 749 }
 750
 751 void
 752 MixLayout::button_down ()
 753 {
 754         p2.scroll_dn_1_track ();
 755 }
 756
 757 void
 758 MixLayout::button_up ()
 759 {
 760         p2.scroll_up_1_track ();
 761 }
 762
 763 void
 764 MixLayout::update_meters ()
 765 {
 766         if (vpot_mode != Volume) {
 767                 return;
 768         }
 769
 770         for (uint32_t n = 0; n < 8; ++n) {
 771                 gain_meter[n]->meter->update_meters ();
 772         }
 773 }
 774
 775 MixLayout::GainMeter::GainMeter (Item* parent, Push2& p2)
 776         : Container (parent)
 777 {
 778         knob = new Push2Knob (p2, this);
 779         knob->set_radius (25);
 780         /* leave position at (0,0) */
 781
 782         meter = new LevelMeter (p2, this, 90, ArdourCanvas::Meter::Vertical);
 783         meter->set_position (Duple (40, -60));
 784 }