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         pan_bar_packer.show();
 155         panning_viewport.show();
 156         panning_up.show();
 157         panning_up_arrow.show();
 158         panning_down.show();
 159         panning_down_arrow.show();
 160         pan_vbox.show();
 161         panning_link_button.show();
 162         panning_link_direction_button.show();
 163         panning_link_box.show();
 164         pan_automation_style_button.show();
 165         pan_automation_state_button.show();
 166         show();
 167 }
 168
 169 bool
 170 PannerUI::panning_link_button_press (GdkEventButton* ev)
 171 {
 172         cerr << "link press\n";
 173         return true;
 174 }
 175
 176 bool
 177 PannerUI::panning_link_button_release (GdkEventButton* ev)
 178 {
 179         cerr << "link release\n";
 180         if (!ignore_toggle) {
 181                 _io->panner().set_linked (!_io->panner().linked());
 182         }
 183         return true;
 184 }
 185
 186 void
 187 PannerUI::panning_link_direction_clicked()
 188 {
 189         switch (_io->panner().link_direction()) {
 190         case Panner::SameDirection:
 191                 _io->panner().set_link_direction (Panner::OppositeDirection);
 192                 break;
 193         default:
 194                 _io->panner().set_link_direction (Panner::SameDirection);
 195                 break;
 196         }
 197 }
 198
 199 void
 200 PannerUI::update_pan_linkage ()
 201 {
 202         ENSURE_GUI_THREAD(mem_fun(*this, &PannerUI::update_pan_linkage));
 203
 204         bool x = _io->panner().linked();
 205         bool bx = panning_link_button.get_active();
 206
 207         if (x != bx) {
 208
 209                 ignore_toggle = true;
 210                 panning_link_button.set_active (x);
 211                 ignore_toggle = false;
 212         }
 213
 214         panning_link_direction_button.set_sensitive (x);
 215
 216         switch (_io->panner().link_direction()) {
 217         case Panner::SameDirection:
 218                 panning_link_direction_button.set_image (*(manage (new Image (get_xpm ("forwardblarrow.xpm")))));
 219                 break;
 220         default:
 221                 panning_link_direction_button.set_image (*(manage (new Image (get_xpm("revdblarrow.xpm")))));
 222                 break;
 223         }
 224 }
 225
 226 void
 227 PannerUI::set_width (Width w)
 228 {
 229         switch (w) {
 230         case Wide:
 231                 panning_link_button.set_label (_("link"));
 232                 break;
 233         case Narrow:
 234                 panning_link_button.set_label (_("L"));
 235                 break;
 236         }
 237
 238         _width = w;
 239 }
 240
 241
 242 PannerUI::~PannerUI ()
 243 {
 244         for (vector<Adjustment*>::iterator i = pan_adjustments.begin(); i != pan_adjustments.end(); ++i) {
 245                 delete (*i);
 246         }
 247
 248         for (vector<PannerBar*>::iterator i = pan_bars.begin(); i != pan_bars.end(); ++i) {
 249                 delete (*i);
 250         }
 251
 252         if (panner) {
 253                 delete panner;
 254         }
 255
 256         if (pan_menu) {
 257                 delete pan_menu;
 258         }
 259
 260 }
 261
 262
 263 void
 264 PannerUI::panner_changed ()
 265 {
 266         ENSURE_GUI_THREAD (mem_fun(*this, &PannerUI::panner_changed));
 267         setup_pan ();
 268 }
 269
 270 void
 271 PannerUI::update_pan_state ()
 272 {
 273         /* currently nothing to do */
 274         // ENSURE_GUI_THREAD (mem_fun(*this, &PannerUI::update_panner_state));
 275 }
 276
 277 void
 278 PannerUI::setup_pan ()
 279 {
 280         uint32_t nouts = _io->n_outputs ().n_audio();
 281
 282         if (nouts == 0 || nouts == 1) {
 283
 284                 while (!pan_adjustments.empty()) {
 285                         delete pan_bars.back();
 286                         pan_bars.pop_back ();
 287                         delete pan_adjustments.back();
 288                         pan_adjustments.pop_back ();
 289                 }
 290
 291                 /* stick something into the panning viewport so that it redraws */
 292
 293                 EventBox* eb = manage (new EventBox());
 294                 panning_viewport.remove ();
 295                 panning_viewport.add (*eb);
 296                 panning_viewport.show_all ();
 297
 298         } else if (nouts == 2) {
 299
 300                 vector<Adjustment*>::size_type asz;
 301                 uint32_t npans = _io->panner().size();
 302
 303                 while (!pan_adjustments.empty()) {
 304                         delete pan_bars.back();
 305                         pan_bars.pop_back ();
 306                         delete pan_adjustments.back();
 307                         pan_adjustments.pop_back ();
 308                 }
 309
 310                 while ((asz = pan_adjustments.size()) < npans) {
 311
 312                         float x, rx;
 313                         PannerBar* bc;
 314
 315                         /* initialize adjustment with 0.0 (L) or 1.0 (R) for the first and second panners,
 316                            which serves as a default, otherwise use current value */
 317
 318                         _io->panner()[asz]->get_position (rx);
 319
 320                         if (npans == 1) {
 321                                 x = 0.5;
 322                         } else if (asz == 0) {
 323                                 x = 0.0;
 324                         } else if (asz == 1) {
 325                                 x = 1.0;
 326                         } else {
 327                                 x = rx;
 328                         }
 329
 330                         pan_adjustments.push_back (new Adjustment (x, 0, 1.0, 0.05, 0.1));
 331                         bc = new PannerBar (*pan_adjustments[asz], _io->panner()[asz]->pan_control());
 332
 333                         /* now set adjustment with current value of panner, then connect the signals */
 334                         pan_adjustments.back()->set_value(rx);
 335                         pan_adjustments.back()->signal_value_changed().connect (bind (mem_fun(*this, &PannerUI::pan_adjustment_changed), (uint32_t) asz));
 336
 337                         _io->panner()[asz]->Changed.connect (bind (mem_fun(*this, &PannerUI::pan_value_changed), (uint32_t) asz));
 338
 339
 340                         bc->set_name ("PanSlider");
 341                         bc->set_shadow_type (Gtk::SHADOW_NONE);
 342
 343                         bc->StartGesture.connect (bind (mem_fun (*_io, &IO::start_pan_touch), (uint32_t) asz));
 344                         bc->StopGesture.connect (bind (mem_fun (*_io, &IO::end_pan_touch), (uint32_t) asz));
 345
 346                         char buf[64];
 347                         snprintf (buf, sizeof (buf), _("panner for channel %zu"), asz + 1);
 348                         ARDOUR_UI::instance()->tooltips().set_tip (bc->event_widget(), buf);
 349
 350                         bc->event_widget().signal_button_release_event().connect
 351                                 (bind (mem_fun(*this, &PannerUI::pan_button_event), (uint32_t) asz));
 352
 353                         bc->set_size_request (-1, pan_bar_height);
 354
 355                         pan_bars.push_back (bc);
 356                         pan_bar_packer.pack_start (*bc, false, false);
 357                 }
 358
 359                 /* now that we actually have the pan bars,
 360                    set their sensitivity based on current
 361                    automation state.
 362                 */
 363
 364                 update_pan_sensitive ();
 365
 366                 panning_viewport.remove ();
 367                 panning_viewport.add (pan_bar_packer);
 368                 panning_viewport.show_all ();
 369
 370         } else {
 371
 372                 if (panner == 0) {
 373                         panner = new Panner2d (_io->panner(), 61);
 374                         panner->set_name ("MixerPanZone");
 375                         panner->show ();
 376                 }
 377
 378                 update_pan_sensitive ();
 379                 panner->reset (_io->n_inputs().n_audio());
 380                 panner->set_size_request (-1, 61);
 381
 382                 /* and finally, add it to the panner frame */
 383
 384                 panning_viewport.remove ();
 385                 panning_viewport.add (*panner);
 386                 panning_viewport.show_all ();
 387         }
 388 }
 389
 390 bool
 391 PannerUI::pan_button_event (GdkEventButton* ev, uint32_t which)
 392 {
 393         switch (ev->button) {
 394         case 3:
 395                 if (pan_menu == 0) {
 396                         pan_menu = manage (new Menu);
 397                         pan_menu->set_name ("ArdourContextMenu");
 398                 }
 399                 build_pan_menu (which);
 400                 pan_menu->popup (1, ev->time);
 401                 return true;
 402                 break;
 403         default:
 404                 return false;
 405         }
 406
 407         return false; // what's wrong with gcc?
 408 }
 409
 410 void
 411 PannerUI::build_pan_menu (uint32_t which)
 412 {
 413         using namespace Menu_Helpers;
 414         MenuList& items (pan_menu->items());
 415
 416         items.clear ();
 417
 418         items.push_back (CheckMenuElem (_("Mute")));
 419
 420         /* set state first, connect second */
 421
 422         (dynamic_cast<CheckMenuItem*> (&items.back()))->set_active (_io->panner()[which]->muted());
 423         (dynamic_cast<CheckMenuItem*> (&items.back()))->signal_toggled().connect
 424                 (bind (mem_fun(*this, &PannerUI::pan_mute), which));
 425
 426         items.push_back (CheckMenuElem (_("Bypass"), mem_fun(*this, &PannerUI::pan_bypass_toggle)));
 427         bypass_menu_item = static_cast<CheckMenuItem*> (&items.back());
 428
 429         /* set state first, connect second */
 430
 431         bypass_menu_item->set_active (_io->panner().bypassed());
 432         bypass_menu_item->signal_toggled().connect (mem_fun(*this, &PannerUI::pan_bypass_toggle));
 433
 434         items.push_back (MenuElem (_("Reset"), mem_fun(*this, &PannerUI::pan_reset)));
 435         items.push_back (SeparatorElem());
 436         items.push_back (MenuElem (_("Reset all")));
 437 }
 438
 439 void
 440 PannerUI::pan_mute (uint32_t which)
 441 {
 442         StreamPanner* sp = _io->panner()[which];
 443         sp->set_muted (!sp->muted());
 444 }
 445
 446 void
 447 PannerUI::pan_bypass_toggle ()
 448 {
 449         if (bypass_menu_item && (_io->panner().bypassed() != bypass_menu_item->get_active())) {
 450                 _io->panner().set_bypassed (!_io->panner().bypassed());
 451         }
 452 }
 453
 454 void
 455 PannerUI::pan_reset ()
 456 {
 457 }
 458
 459 void
 460 PannerUI::effective_pan_display ()
 461 {
 462         if (_io->panner().empty()) {
 463                 return;
 464         }
 465
 466         switch (_io->n_outputs().n_audio()) {
 467         case 0:
 468         case 1:
 469                 /* relax */
 470                 break;
 471
 472         case 2:
 473                 update_pan_bars (true);
 474                 break;
 475
 476         default:
 477                 //panner->move_puck (pan_value (v, right), 0.5);
 478                 break;
 479         }
 480 }
 481
 482 void
 483 PannerUI::pan_changed (void *src)
 484 {
 485         if (src == this) {
 486                 return;
 487         }
 488
 489         switch (_io->panner().size()) {
 490         case 0:
 491                 panning_link_direction_button.set_sensitive (false);
 492                 panning_link_button.set_sensitive (false);
 493                 return;
 494         case 1:
 495                 panning_link_direction_button.set_sensitive (false);
 496                 panning_link_button.set_sensitive (false);
 497                 break;
 498         default:
 499                 panning_link_direction_button.set_sensitive (true);
 500                 panning_link_button.set_sensitive (true);
 501         }
 502
 503         uint32_t nouts = _io->n_outputs().n_audio();
 504
 505         switch (nouts) {
 506         case 0:
 507         case 1:
 508                 /* relax */
 509                 break;
 510
 511         case 2:
 512                 update_pan_bars (false);
 513                 break;
 514
 515         default:
 516                 // panner->move_puck (pan_value (pans[0], pans[1]), 0.5);
 517                 break;
 518         }
 519 }
 520
 521 void
 522 PannerUI::pan_adjustment_changed (uint32_t which)
 523 {
 524         if (!in_pan_update && which < _io->panner().size()) {
 525
 526                 float xpos;
 527                 float val = pan_adjustments[which]->get_value ();
 528                 _io->panner()[which]->get_position (xpos);
 529
 530                 /* add a kinda-sorta detent for the middle */
 531
 532                 if (val != 0.5 && Panner::equivalent (val, 0.5)) {
 533                         /* this is going to be reentrant, so just
 534                            return after it.
 535                         */
 536
 537                         in_pan_update = true;
 538                         pan_adjustments[which]->set_value (0.5);
 539                         in_pan_update = false;
 540                         return;
 541                 }
 542
 543                 if (!Panner::equivalent (val, xpos)) {
 544
 545                         _io->panner()[which]->set_position (val);
 546                         /* XXX
 547                            the panner objects have no access to the session,
 548                            so do this here. ick.
 549                         */
 550                         _session.set_dirty();
 551                 }
 552         }
 553 }
 554
 555 void
 556 PannerUI::pan_value_changed (uint32_t which)
 557 {
 558         ENSURE_GUI_THREAD (bind (mem_fun(*this, &PannerUI::pan_value_changed), which));
 559
 560         if (_io->n_outputs().n_audio() > 1 && which < _io->panner().size()) {
 561                 float xpos;
 562                 float val = pan_adjustments[which]->get_value ();
 563
 564                 _io->panner()[which]->get_position (xpos);
 565
 566                 if (!Panner::equivalent (val, xpos)) {
 567                         in_pan_update = true;
 568                         pan_adjustments[which]->set_value (xpos);
 569                         in_pan_update = false;
 570                 }
 571         }
 572 }
 573
 574 void
 575 PannerUI::update_pan_bars (bool only_if_aplay)
 576 {
 577         uint32_t n;
 578         vector<Adjustment*>::iterator i;
 579
 580         in_pan_update = true;
 581
 582         /* this runs during automation playback, and moves the bar controllers
 583            and/or pucks around.
 584         */
 585
 586         for (i = pan_adjustments.begin(), n = 0; i != pan_adjustments.end(); ++i, ++n) {
 587                 float xpos, val;
 588
 589                 if (only_if_aplay) {
 590                         boost::shared_ptr<AutomationList> alist (_io->panner()[n]->pan_control()->list());
 591
 592                         if (!alist->automation_playback()) {
 593                                 continue;
 594                         }
 595                 }
 596
 597                 _io->panner()[n]->get_effective_position (xpos);
 598                 val = (*i)->get_value ();
 599
 600                 if (!Panner::equivalent (val, xpos)) {
 601                         (*i)->set_value (xpos);
 602                 }
 603         }
 604
 605         in_pan_update = false;
 606 }
 607
 608 void
 609 PannerUI::pan_printer (char *buf, uint32_t len, Adjustment* adj)
 610 {
 611         float val = adj->get_value();
 612
 613         if (val == 0.0f) {
 614                 snprintf (buf, len, X_("L"));
 615         } else if (val == 1.0f) {
 616                 snprintf (buf, len, X_("R"));
 617         } else if (Panner::equivalent (val, 0.5f)) {
 618                 snprintf (buf, len, X_("C"));
 619         } else {
 620                 /* don't print anything */
 621                 buf[0] = '\0';
 622         }
 623 }
 624
 625 void
 626 PannerUI::update_pan_sensitive ()
 627 {
 628         bool sensitive = !(_io->panner().automation_state() & Play);
 629
 630         switch (_io->n_outputs().n_audio()) {
 631         case 0:
 632         case 1:
 633                 break;
 634         case 2:
 635                 for (vector<PannerBar*>::iterator i = pan_bars.begin(); i != pan_bars.end(); ++i) {
 636                         (*i)->set_sensitive (sensitive);
 637                 }
 638                 break;
 639         default:
 640                 if (panner) {
 641                         panner->set_sensitive (sensitive);
 642                 }
 643                 break;
 644         }
 645 }
 646
 647 gint
 648 PannerUI::pan_automation_state_button_event (GdkEventButton *ev)
 649 {
 650         using namespace Menu_Helpers;
 651
 652         if (ev->type == GDK_BUTTON_RELEASE) {
 653                 return TRUE;
 654         }
 655
 656         switch (ev->button) {
 657         case 1:
 658                 pan_astate_menu.popup (1, ev->time);
 659                 break;
 660         default:
 661                 break;
 662         }
 663
 664         return TRUE;
 665 }
 666
 667 gint
 668 PannerUI::pan_automation_style_button_event (GdkEventButton *ev)
 669 {
 670         if (ev->type == GDK_BUTTON_RELEASE) {
 671                 return TRUE;
 672         }
 673
 674         switch (ev->button) {
 675         case 1:
 676                 pan_astyle_menu.popup (1, ev->time);
 677                 break;
 678         default:
 679                 break;
 680         }
 681         return TRUE;
 682 }
 683
 684 void
 685 PannerUI::pan_automation_style_changed ()
 686 {
 687         ENSURE_GUI_THREAD(mem_fun(*this, &PannerUI::pan_automation_style_changed));
 688
 689         switch (_width) {
 690         case Wide:
 691                 pan_automation_style_button.set_label (astyle_string(_io->panner().automation_style()));
 692                 break;
 693         case Narrow:
 694                 pan_automation_style_button.set_label (short_astyle_string(_io->panner().automation_style()));
 695                 break;
 696         }
 697 }
 698
 699 void
 700 PannerUI::pan_automation_state_changed ()
 701 {
 702         ENSURE_GUI_THREAD(mem_fun(*this, &PannerUI::pan_automation_state_changed));
 703
 704         bool x;
 705
 706         switch (_width) {
 707         case Wide:
 708           pan_automation_state_button.set_label (astate_string(_io->panner().automation_state()));
 709                 break;
 710         case Narrow:
 711           pan_automation_state_button.set_label (short_astate_string(_io->panner().automation_state()));
 712                 break;
 713         }
 714
 715         /* when creating a new session, we get to create busses (and
 716            sometimes tracks) with no outputs by the time they get
 717            here.
 718         */
 719
 720         if (_io->panner().empty()) {
 721                 return;
 722         }
 723
 724         x = (_io->panner().front()->pan_control()->list()->automation_state() != Off);
 725
 726         if (pan_automation_state_button.get_active() != x) {
 727         ignore_toggle = true;
 728                 pan_automation_state_button.set_active (x);
 729                 ignore_toggle = false;
 730         }
 731
 732         update_pan_sensitive ();
 733
 734         /* start watching automation so that things move */
 735
 736         pan_watching.disconnect();
 737
 738         if (x) {
 739           pan_watching = ARDOUR_UI::RapidScreenUpdate.connect (mem_fun (*this, &PannerUI::effective_pan_display));
 740         }
 741 }
 742
 743 string
 744 PannerUI::astate_string (AutoState state)
 745 {
 746         return _astate_string (state, false);
 747 }
 748
 749 string
 750 PannerUI::short_astate_string (AutoState state)
 751 {
 752         return _astate_string (state, true);
 753 }
 754
 755 string
 756 PannerUI::_astate_string (AutoState state, bool shrt)
 757 {
 758         string sstr;
 759
 760         switch (state) {
 761         case Off:
 762                 sstr = (shrt ? "M" : _("M"));
 763                 break;
 764         case Play:
 765                 sstr = (shrt ? "P" : _("P"));
 766                 break;
 767         case Touch:
 768                 sstr = (shrt ? "T" : _("T"));
 769                 break;
 770         case Write:
 771                 sstr = (shrt ? "W" : _("W"));
 772                 break;
 773         }
 774
 775         return sstr;
 776 }
 777
 778 string
 779 PannerUI::astyle_string (AutoStyle style)
 780 {
 781         return _astyle_string (style, false);
 782 }
 783
 784 string
 785 PannerUI::short_astyle_string (AutoStyle style)
 786 {
 787         return _astyle_string (style, true);
 788 }
 789
 790 string
 791 PannerUI::_astyle_string (AutoStyle style, bool shrt)
 792 {
 793         if (style & Trim) {
 794                 return _("Trim");
 795         } else {
 796                 /* XXX it might different in different languages */
 797
 798                 return (shrt ? _("Abs") : _("Abs"));
 799         }
 800 }