gtk2_ardour/panner_ui.cc

   1 /*
   2   Copyright (C) 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 #include <limits.h>
  20
  21 #include <ardour/io.h>
  22 #include <ardour/dB.h>
  23 #include <gtkmm2ext/utils.h>
  24 #include <gtkmm2ext/stop_signal.h>
  25 #include <gtkmm2ext/barcontroller.h>
  26 #include <midi++/manager.h>
  27 #include <pbd/fastlog.h>
  28
  29 #include "ardour_ui.h"
  30 #include "panner_ui.h"
  31 #include "panner2d.h"
  32 #include "utils.h"
  33 #include "panner.h"
  34 #include "gui_thread.h"
  35
  36 #include <ardour/session.h>
  37 #include <ardour/panner.h>
  38 #include <ardour/route.h>
  39
  40 #include "i18n.h"
  41
  42 using namespace ARDOUR;
  43 using namespace PBD;
  44 using namespace Gtkmm2ext;
  45 using namespace Gtk;
  46 using namespace sigc;
  47
  48 const int PannerUI::pan_bar_height = 30;
  49
  50 PannerUI::PannerUI (boost::shared_ptr<IO> io, Session& s)
  51         : _io (io),
  52           _session (s),
  53           hAdjustment(0.0, 0.0, 0.0),
  54           vAdjustment(0.0, 0.0, 0.0),
  55           panning_viewport(hAdjustment, vAdjustment),
  56           panning_up_arrow (Gtk::ARROW_UP, Gtk::SHADOW_OUT),
  57           panning_down_arrow (Gtk::ARROW_DOWN, Gtk::SHADOW_OUT),
  58           panning_link_button (_("link")),
  59           pan_automation_style_button (""),
  60           pan_automation_state_button ("")
  61 {
  62         ignore_toggle = false;
  63         pan_menu = 0;
  64         in_pan_update = false;
  65
  66         pan_automation_style_button.set_name ("MixerAutomationModeButton");
  67         pan_automation_state_button.set_name ("MixerAutomationPlaybackButton");
  68
  69         ARDOUR_UI::instance()->tooltips().set_tip (pan_automation_state_button, _("Pan automation mode"));
  70         ARDOUR_UI::instance()->tooltips().set_tip (pan_automation_style_button, _("Pan automation type"));
  71
  72         //set_size_request_to_display_given_text (pan_automation_state_button, X_("O"), 2, 2);
  73         //set_size_request_to_display_given_text (pan_automation_style_button, X_("0"), 2, 2);
  74
  75         pan_bar_packer.set_size_request (-1, 61);
  76         panning_viewport.set_size_request (-1, 61);
  77         panning_viewport.set_name (X_("BaseFrame"));
  78
  79         ARDOUR_UI::instance()->tooltips().set_tip (panning_link_button,
  80                                                    _("panning link control"));
  81         ARDOUR_UI::instance()->tooltips().set_tip (panning_link_direction_button,
  82                                                    _("panning link direction"));
  83
  84         pan_automation_style_button.unset_flags (Gtk::CAN_FOCUS);
  85         pan_automation_state_button.unset_flags (Gtk::CAN_FOCUS);
  86
  87         using namespace Menu_Helpers;
  88         pan_astate_menu.items().push_back (MenuElem (_("Manual"),
  89                                                      bind (mem_fun (_io->panner(), &Panner::set_automation_state), (AutoState) Off)));
  90         pan_astate_menu.items().push_back (MenuElem (_("Play"),
  91                                                      bind (mem_fun (_io->panner(), &Panner::set_automation_state), (AutoState) Play)));
  92         pan_astate_menu.items().push_back (MenuElem (_("Write"),
  93                                                      bind (mem_fun (_io->panner(), &Panner::set_automation_state), (AutoState) Write)));
  94         pan_astate_menu.items().push_back (MenuElem (_("Touch"),
  95                                                      bind (mem_fun (_io->panner(), &Panner::set_automation_state), (AutoState) Touch)));
  96
  97         pan_astyle_menu.items().push_back (MenuElem (_("Trim")));
  98         pan_astyle_menu.items().push_back (MenuElem (_("Abs")));
  99
 100         pan_astate_menu.set_name ("ArdourContextMenu");
 101         pan_astyle_menu.set_name ("ArdourContextMenu");
 102
 103         pan_automation_style_button.signal_button_press_event().connect (mem_fun(*this, &PannerUI::pan_automation_style_button_event), false);
 104         pan_automation_state_button.signal_button_press_event().connect (mem_fun(*this, &PannerUI::pan_automation_state_button_event), false);
 105
 106         panning_link_button.set_name (X_("PanningLinkButton"));
 107         panning_link_direction_button.set_name (X_("PanningLinkDirectionButton"));
 108
 109         panning_link_box.pack_start (panning_link_button, true, true);
 110         panning_link_box.pack_start (panning_link_direction_button, true, true);
 111         panning_link_box.pack_start (pan_automation_state_button, true, true);
 112
 113         /* the pixmap will be reset at some point, but the key thing is that
 114            we need a pixmap in the button just to get started.
 115         */
 116         panning_link_direction_button.add (*(manage (new Image (get_xpm("forwardblarrow.xpm")))));
 117
 118         panning_link_direction_button.signal_clicked().connect
 119                 (mem_fun(*this, &PannerUI::panning_link_direction_clicked));
 120
 121         panning_link_button.signal_button_press_event().connect
 122                 (mem_fun(*this, &PannerUI::panning_link_button_press), false);
 123         panning_link_button.signal_button_release_event().connect
 124                 (mem_fun(*this, &PannerUI::panning_link_button_release), false);
 125
 126         panning_up.set_border_width (3);
 127         panning_down.set_border_width (3);
 128         panning_up.add (panning_up_arrow);
 129         panning_down.add (panning_down_arrow);
 130         panning_up.set_name (X_("PanScrollerBase"));
 131         panning_down.set_name (X_("PanScrollerBase"));
 132         panning_up_arrow.set_name (X_("PanScrollerArrow"));
 133         panning_down_arrow.set_name (X_("PanScrollerArrow"));
 134
 135         pan_vbox.set_spacing (2);
 136         pan_vbox.pack_start (panning_viewport, Gtk::PACK_SHRINK);
 137         pan_vbox.pack_start (panning_link_box, Gtk::PACK_SHRINK);
 138
 139         pack_start (pan_vbox, true, true);
 140
 141         panner = 0;
 142
 143         set_width(Narrow);
 144
 145         _io->panner().Changed.connect (mem_fun(*this, &PannerUI::panner_changed));
 146         _io->panner().LinkStateChanged.connect (mem_fun(*this, &PannerUI::update_pan_linkage));
 147         _io->panner().StateChanged.connect (mem_fun(*this, &PannerUI::update_pan_state));
 148
 149         pan_changed (0);
 150         update_pan_sensitive ();
 151         update_pan_linkage ();
 152         pan_automation_state_changed ();
 153 }
 154
 155 PBD::Controllable*
 156 PannerUI::get_controllable()
 157 {
 158         return pan_bars[0]->get_controllable();
 159 }
 160
 161 bool
 162 PannerUI::panning_link_button_press (GdkEventButton* ev)
 163 {
 164         cerr << "link press\n";
 165         return true;
 166 }
 167
 168 bool
 169 PannerUI::panning_link_button_release (GdkEventButton* ev)
 170 {
 171         cerr << "link release\n";
 172         if (!ignore_toggle) {
 173                 _io->panner().set_linked (!_io->panner().linked());
 174         }
 175         return true;
 176 }
 177
 178 void
 179 PannerUI::panning_link_direction_clicked()
 180 {
 181         switch (_io->panner().link_direction()) {
 182         case Panner::SameDirection:
 183                 _io->panner().set_link_direction (Panner::OppositeDirection);
 184                 break;
 185         default:
 186                 _io->panner().set_link_direction (Panner::SameDirection);
 187                 break;
 188         }
 189 }
 190
 191 void
 192 PannerUI::update_pan_linkage ()
 193 {
 194         ENSURE_GUI_THREAD(mem_fun(*this, &PannerUI::update_pan_linkage));
 195
 196         bool x = _io->panner().linked();
 197         bool bx = panning_link_button.get_active();
 198
 199         if (x != bx) {
 200
 201                 ignore_toggle = true;
 202                 panning_link_button.set_active (x);
 203                 ignore_toggle = false;
 204         }
 205
 206         panning_link_direction_button.set_sensitive (x);
 207
 208         switch (_io->panner().link_direction()) {
 209         case Panner::SameDirection:
 210                 panning_link_direction_button.set_image (*(manage (new Image (get_xpm ("forwardblarrow.xpm")))));
 211                 break;
 212         default:
 213                 panning_link_direction_button.set_image (*(manage (new Image (get_xpm("revdblarrow.xpm")))));
 214                 break;
 215         }
 216 }
 217
 218 void
 219 PannerUI::set_width (Width w)
 220 {
 221         switch (w) {
 222         case Wide:
 223                 panning_link_button.set_label (_("link"));
 224                 break;
 225         case Narrow:
 226                 panning_link_button.set_label (_("L"));
 227                 break;
 228         }
 229
 230         _width = w;
 231 }
 232
 233
 234 PannerUI::~PannerUI ()
 235 {
 236         for (vector<Adjustment*>::iterator i = pan_adjustments.begin(); i != pan_adjustments.end(); ++i) {
 237                 delete (*i);
 238         }
 239
 240         for (vector<PannerBar*>::iterator i = pan_bars.begin(); i != pan_bars.end(); ++i) {
 241                 delete (*i);
 242         }
 243
 244         if (panner) {
 245                 delete panner;
 246         }
 247
 248         if (pan_menu) {
 249                 delete pan_menu;
 250         }
 251
 252 }
 253
 254
 255 void
 256 PannerUI::panner_changed ()
 257 {
 258         ENSURE_GUI_THREAD (mem_fun(*this, &PannerUI::panner_changed));
 259         setup_pan ();
 260 }
 261
 262 void
 263 PannerUI::update_pan_state ()
 264 {
 265         /* currently nothing to do */
 266         // ENSURE_GUI_THREAD (mem_fun(*this, &PannerUI::update_panner_state));
 267 }
 268
 269 void
 270 PannerUI::setup_pan ()
 271 {
 272         uint32_t nouts = _io->n_outputs ();
 273
 274         if (nouts == 0 || nouts == 1) {
 275
 276                 while (!pan_adjustments.empty()) {
 277                         delete pan_bars.back();
 278                         pan_bars.pop_back ();
 279                         delete pan_adjustments.back();
 280                         pan_adjustments.pop_back ();
 281                 }
 282
 283                 /* stick something into the panning viewport so that it redraws */
 284
 285                 EventBox* eb = manage (new EventBox());
 286                 panning_viewport.remove ();
 287                 panning_viewport.add (*eb);
 288                 panning_viewport.show_all ();
 289
 290         } else if (nouts == 2) {
 291
 292                 vector<Adjustment*>::size_type asz;
 293                 uint32_t npans = _io->panner().size();
 294
 295                 while (!pan_adjustments.empty()) {
 296                         delete pan_bars.back();
 297                         pan_bars.pop_back ();
 298                         delete pan_adjustments.back();
 299                         pan_adjustments.pop_back ();
 300                 }
 301
 302                 while ((asz = pan_adjustments.size()) < npans) {
 303
 304                         float x, rx;
 305                         PannerBar* bc;
 306
 307                         /* initialize adjustment with 0.0 (L) or 1.0 (R) for the first and second panners,
 308                            which serves as a default, otherwise use current value */
 309
 310                         _io->panner()[asz]->get_position (rx);
 311
 312                         if (npans == 1) {
 313                                 x = 0.5;
 314                         } else if (asz == 0) {
 315                                 x = 0.0;
 316                         } else if (asz == 1) {
 317                                 x = 1.0;
 318                         } else {
 319                                 x = rx;
 320                         }
 321
 322                         pan_adjustments.push_back (new Adjustment (x, 0, 1.0, 0.05, 0.1));
 323                         bc = new PannerBar (*pan_adjustments[asz], _io->panner()[asz]->control());
 324
 325                         /* now set adjustment with current value of panner, then connect the signals */
 326                         pan_adjustments.back()->set_value(rx);
 327                         pan_adjustments.back()->signal_value_changed().connect (bind (mem_fun(*this, &PannerUI::pan_adjustment_changed), (uint32_t) asz));
 328
 329                         _io->panner()[asz]->Changed.connect (bind (mem_fun(*this, &PannerUI::pan_value_changed), (uint32_t) asz));
 330
 331
 332                         bc->set_name ("PanSlider");
 333                         bc->set_shadow_type (Gtk::SHADOW_NONE);
 334
 335                         bc->StartGesture.connect (bind (mem_fun (*_io, &IO::start_pan_touch), (uint32_t) asz));
 336                         bc->StopGesture.connect (bind (mem_fun (*_io, &IO::end_pan_touch), (uint32_t) asz));
 337
 338                         char buf[64];
 339                         snprintf (buf, sizeof (buf), _("panner for channel %zu"), asz + 1);
 340                         ARDOUR_UI::instance()->tooltips().set_tip (bc->event_widget(), buf);
 341
 342                         bc->event_widget().signal_button_release_event().connect
 343                                 (bind (mem_fun(*this, &PannerUI::pan_button_event), (uint32_t) asz));
 344
 345                         bc->set_size_request (-1, pan_bar_height);
 346
 347                         pan_bars.push_back (bc);
 348                         pan_bar_packer.pack_start (*bc, false, false);
 349                 }
 350
 351                 /* now that we actually have the pan bars,
 352                    set their sensitivity based on current
 353                    automation state.
 354                 */
 355
 356                 update_pan_sensitive ();
 357
 358                 panning_viewport.remove ();
 359                 panning_viewport.add (pan_bar_packer);
 360                 panning_viewport.show_all ();
 361
 362         } else {
 363
 364                 if (panner == 0) {
 365                         panner = new Panner2d (_io->panner(), 61);
 366                         panner->set_name ("MixerPanZone");
 367                         panner->show ();
 368                 }
 369
 370                 update_pan_sensitive ();
 371                 panner->reset (_io->n_inputs());
 372                 panner->set_size_request (-1, 61);
 373
 374                 /* and finally, add it to the panner frame */
 375
 376                 panning_viewport.remove ();
 377                 panning_viewport.add (*panner);
 378                 panning_viewport.show_all ();
 379         }
 380 }
 381
 382 bool
 383 PannerUI::pan_button_event (GdkEventButton* ev, uint32_t which)
 384 {
 385         switch (ev->button) {
 386         case 3:
 387                 if (pan_menu == 0) {
 388                         pan_menu = manage (new Menu);
 389                         pan_menu->set_name ("ArdourContextMenu");
 390                 }
 391                 build_pan_menu (which);
 392                 pan_menu->popup (1, ev->time);
 393                 return true;
 394                 break;
 395         default:
 396                 return false;
 397         }
 398
 399         return false; // what's wrong with gcc?
 400 }
 401
 402 void
 403 PannerUI::build_pan_menu (uint32_t which)
 404 {
 405         using namespace Menu_Helpers;
 406         MenuList& items (pan_menu->items());
 407
 408         items.clear ();
 409
 410         items.push_back (CheckMenuElem (_("Mute")));
 411
 412         /* set state first, connect second */
 413
 414         (dynamic_cast<CheckMenuItem*> (&items.back()))->set_active (_io->panner()[which]->muted());
 415         (dynamic_cast<CheckMenuItem*> (&items.back()))->signal_toggled().connect
 416                 (bind (mem_fun(*this, &PannerUI::pan_mute), which));
 417
 418         items.push_back (CheckMenuElem (_("Bypass"), mem_fun(*this, &PannerUI::pan_bypass_toggle)));
 419         bypass_menu_item = static_cast<CheckMenuItem*> (&items.back());
 420
 421         /* set state first, connect second */
 422
 423         bypass_menu_item->set_active (_io->panner().bypassed());
 424         bypass_menu_item->signal_toggled().connect (mem_fun(*this, &PannerUI::pan_bypass_toggle));
 425
 426         items.push_back (MenuElem (_("Reset"), mem_fun(*this, &PannerUI::pan_reset)));
 427         items.push_back (SeparatorElem());
 428         items.push_back (MenuElem (_("Reset all")));
 429 }
 430
 431 void
 432 PannerUI::pan_mute (uint32_t which)
 433 {
 434         StreamPanner* sp = _io->panner()[which];
 435         sp->set_muted (!sp->muted());
 436 }
 437
 438 void
 439 PannerUI::pan_bypass_toggle ()
 440 {
 441         if (bypass_menu_item && (_io->panner().bypassed() != bypass_menu_item->get_active())) {
 442                 _io->panner().set_bypassed (!_io->panner().bypassed());
 443         }
 444 }
 445
 446 void
 447 PannerUI::pan_reset ()
 448 {
 449 }
 450
 451 void
 452 PannerUI::effective_pan_display ()
 453 {
 454         if (_io->panner().empty()) {
 455                 return;
 456         }
 457
 458         switch (_io->n_outputs()) {
 459         case 0:
 460         case 1:
 461                 /* relax */
 462                 break;
 463
 464         case 2:
 465                 update_pan_bars (true);
 466                 break;
 467
 468         default:
 469                 //panner->move_puck (pan_value (v, right), 0.5);
 470                 break;
 471         }
 472 }
 473
 474 void
 475 PannerUI::pan_changed (void *src)
 476 {
 477         if (src == this) {
 478                 return;
 479         }
 480
 481         switch (_io->panner().size()) {
 482         case 0:
 483                 panning_link_direction_button.set_sensitive (false);
 484                 panning_link_button.set_sensitive (false);
 485                 return;
 486         case 1:
 487                 panning_link_direction_button.set_sensitive (false);
 488                 panning_link_button.set_sensitive (false);
 489                 break;
 490         default:
 491                 panning_link_direction_button.set_sensitive (true);
 492                 panning_link_button.set_sensitive (true);
 493         }
 494
 495         uint32_t nouts = _io->n_outputs();
 496
 497         switch (nouts) {
 498         case 0:
 499         case 1:
 500                 /* relax */
 501                 break;
 502
 503         case 2:
 504                 update_pan_bars (false);
 505                 break;
 506
 507         default:
 508                 // panner->move_puck (pan_value (pans[0], pans[1]), 0.5);
 509                 break;
 510         }
 511 }
 512
 513 void
 514 PannerUI::pan_adjustment_changed (uint32_t which)
 515 {
 516         if (!in_pan_update && which < _io->panner().size()) {
 517
 518                 float xpos;
 519                 float val = pan_adjustments[which]->get_value ();
 520                 _io->panner()[which]->get_position (xpos);
 521
 522                 /* add a kinda-sorta detent for the middle */
 523
 524                 if (val != 0.5 && Panner::equivalent (val, 0.5)) {
 525                         /* this is going to be reentrant, so just
 526                            return after it.
 527                         */
 528
 529                         in_pan_update = true;
 530                         pan_adjustments[which]->set_value (0.5);
 531                         in_pan_update = false;
 532                         return;
 533                 }
 534
 535                 if (!Panner::equivalent (val, xpos)) {
 536
 537                         _io->panner()[which]->set_position (val);
 538                         /* XXX
 539                            the panner objects have no access to the session,
 540                            so do this here. ick.
 541                         */
 542                         _session.set_dirty();
 543                 }
 544         }
 545 }
 546
 547 void
 548 PannerUI::pan_value_changed (uint32_t which)
 549 {
 550         ENSURE_GUI_THREAD (bind (mem_fun(*this, &PannerUI::pan_value_changed), which));
 551
 552         if (_io->n_outputs() > 1 && which < _io->panner().size()) {
 553                 float xpos;
 554                 float val = pan_adjustments[which]->get_value ();
 555
 556                 _io->panner()[which]->get_position (xpos);
 557
 558                 if (!Panner::equivalent (val, xpos)) {
 559                         in_pan_update = true;
 560                         pan_adjustments[which]->set_value (xpos);
 561                         in_pan_update = false;
 562                 }
 563         }
 564 }
 565
 566 void
 567 PannerUI::update_pan_bars (bool only_if_aplay)
 568 {
 569         uint32_t n;
 570         vector<Adjustment*>::iterator i;
 571
 572         in_pan_update = true;
 573
 574         /* this runs during automation playback, and moves the bar controllers
 575            and/or pucks around.
 576         */
 577
 578         for (i = pan_adjustments.begin(), n = 0; i != pan_adjustments.end(); ++i, ++n) {
 579                 float xpos, val;
 580
 581                 if (only_if_aplay) {
 582                         AutomationList& alist (_io->panner()[n]->automation());
 583
 584                         if (!alist.automation_playback()) {
 585                                 continue;
 586                         }
 587                 }
 588
 589                 _io->panner()[n]->get_effective_position (xpos);
 590                 val = (*i)->get_value ();
 591
 592                 if (!Panner::equivalent (val, xpos)) {
 593                         (*i)->set_value (xpos);
 594                 }
 595         }
 596
 597         in_pan_update = false;
 598 }
 599
 600 void
 601 PannerUI::pan_printer (char *buf, uint32_t len, Adjustment* adj)
 602 {
 603         float val = adj->get_value();
 604
 605         if (val == 0.0f) {
 606                 snprintf (buf, len, X_("L"));
 607         } else if (val == 1.0f) {
 608                 snprintf (buf, len, X_("R"));
 609         } else if (Panner::equivalent (val, 0.5f)) {
 610                 snprintf (buf, len, X_("C"));
 611         } else {
 612                 /* don't print anything */
 613                 buf[0] = '\0';
 614         }
 615 }
 616
 617 void
 618 PannerUI::update_pan_sensitive ()
 619 {
 620         bool sensitive = !(_io->panner().automation_state() & Play);
 621
 622         switch (_io->n_outputs()) {
 623         case 0:
 624         case 1:
 625                 break;
 626         case 2:
 627                 for (vector<PannerBar*>::iterator i = pan_bars.begin(); i != pan_bars.end(); ++i) {
 628                         (*i)->set_sensitive (sensitive);
 629                 }
 630                 break;
 631         default:
 632                 if (panner) {
 633                         panner->set_sensitive (sensitive);
 634                 }
 635                 break;
 636         }
 637 }
 638
 639 gint
 640 PannerUI::pan_automation_state_button_event (GdkEventButton *ev)
 641 {
 642         using namespace Menu_Helpers;
 643
 644         if (ev->type == GDK_BUTTON_RELEASE) {
 645                 return TRUE;
 646         }
 647
 648         switch (ev->button) {
 649         case 1:
 650                 pan_astate_menu.popup (1, ev->time);
 651                 break;
 652         default:
 653                 break;
 654         }
 655
 656         return TRUE;
 657 }
 658
 659 gint
 660 PannerUI::pan_automation_style_button_event (GdkEventButton *ev)
 661 {
 662         if (ev->type == GDK_BUTTON_RELEASE) {
 663                 return TRUE;
 664         }
 665
 666         switch (ev->button) {
 667         case 1:
 668                 pan_astyle_menu.popup (1, ev->time);
 669                 break;
 670         default:
 671                 break;
 672         }
 673         return TRUE;
 674 }
 675
 676 void
 677 PannerUI::pan_automation_style_changed ()
 678 {
 679         ENSURE_GUI_THREAD(mem_fun(*this, &PannerUI::pan_automation_style_changed));
 680
 681         switch (_width) {
 682         case Wide:
 683                 pan_automation_style_button.set_label (astyle_string(_io->panner().automation_style()));
 684                 break;
 685         case Narrow:
 686                 pan_automation_style_button.set_label (short_astyle_string(_io->panner().automation_style()));
 687                 break;
 688         }
 689 }
 690
 691 void
 692 PannerUI::pan_automation_state_changed ()
 693 {
 694         ENSURE_GUI_THREAD(mem_fun(*this, &PannerUI::pan_automation_state_changed));
 695
 696         bool x;
 697
 698         switch (_width) {
 699         case Wide:
 700           pan_automation_state_button.set_label (astate_string(_io->panner().automation_state()));
 701                 break;
 702         case Narrow:
 703           pan_automation_state_button.set_label (short_astate_string(_io->panner().automation_state()));
 704                 break;
 705         }
 706
 707         /* when creating a new session, we get to create busses (and
 708            sometimes tracks) with no outputs by the time they get
 709            here.
 710         */
 711
 712         if (_io->panner().empty()) {
 713                 return;
 714         }
 715
 716         x = (_io->panner().front()->automation().automation_state() != Off);
 717
 718         if (pan_automation_state_button.get_active() != x) {
 719         ignore_toggle = true;
 720                 pan_automation_state_button.set_active (x);
 721                 ignore_toggle = false;
 722         }
 723
 724         update_pan_sensitive ();
 725
 726         /* start watching automation so that things move */
 727
 728         pan_watching.disconnect();
 729
 730         if (x) {
 731           pan_watching = ARDOUR_UI::RapidScreenUpdate.connect (mem_fun (*this, &PannerUI::effective_pan_display));
 732         }
 733 }
 734
 735 string
 736 PannerUI::astate_string (AutoState state)
 737 {
 738         return _astate_string (state, false);
 739 }
 740
 741 string
 742 PannerUI::short_astate_string (AutoState state)
 743 {
 744         return _astate_string (state, true);
 745 }
 746
 747 string
 748 PannerUI::_astate_string (AutoState state, bool shrt)
 749 {
 750         string sstr;
 751
 752         switch (state) {
 753         case Off:
 754                 sstr = (shrt ? "M" : _("M"));
 755                 break;
 756         case Play:
 757                 sstr = (shrt ? "P" : _("P"));
 758                 break;
 759         case Touch:
 760                 sstr = (shrt ? "T" : _("T"));
 761                 break;
 762         case Write:
 763                 sstr = (shrt ? "W" : _("W"));
 764                 break;
 765         }
 766
 767         return sstr;
 768 }
 769
 770 string
 771 PannerUI::astyle_string (AutoStyle style)
 772 {
 773         return _astyle_string (style, false);
 774 }
 775
 776 string
 777 PannerUI::short_astyle_string (AutoStyle style)
 778 {
 779         return _astyle_string (style, true);
 780 }
 781
 782 string
 783 PannerUI::_astyle_string (AutoStyle style, bool shrt)
 784 {
 785         if (style & Trim) {
 786                 return _("Trim");
 787         } else {
 788                 /* XXX it might different in different languages */
 789
 790                 return (shrt ? _("Abs") : _("Abs"));
 791         }
 792 }