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 "gui_thread.h"
  34
  35 #include <ardour/session.h>
  36 #include <ardour/panner.h>
  37 #include <ardour/route.h>
  38
  39 #include "i18n.h"
  40
  41 using namespace ARDOUR;
  42 using namespace PBD;
  43 using namespace Gtkmm2ext;
  44 using namespace Gtk;
  45 using namespace sigc;
  46
  47
  48 PannerUI::PannerUI (boost::shared_ptr<IO> io, Session& s)
  49         : _io (io),
  50           _session (s),
  51           hAdjustment(0.0, 0.0, 0.0),
  52           vAdjustment(0.0, 0.0, 0.0),
  53           panning_viewport(hAdjustment, vAdjustment),
  54           panning_up_arrow (Gtk::ARROW_UP, Gtk::SHADOW_OUT),
  55           panning_down_arrow (Gtk::ARROW_DOWN, Gtk::SHADOW_OUT),
  56           panning_link_button (_("link")),
  57           pan_automation_style_button (""),
  58           pan_automation_state_button ("")
  59 {
  60         ignore_toggle = false;
  61         pan_menu = 0;
  62         in_pan_update = false;
  63
  64         pan_automation_style_button.set_name ("MixerAutomationModeButton");
  65         pan_automation_state_button.set_name ("MixerAutomationPlaybackButton");
  66
  67         ARDOUR_UI::instance()->tooltips().set_tip (pan_automation_state_button, _("Pan automation mode"));
  68         ARDOUR_UI::instance()->tooltips().set_tip (pan_automation_style_button, _("Pan automation type"));
  69
  70         //set_size_request_to_display_given_text (pan_automation_state_button, X_("O"), 2, 2);
  71         //set_size_request_to_display_given_text (pan_automation_style_button, X_("0"), 2, 2);
  72
  73         pan_bar_packer.set_size_request (-1, 61);
  74         panning_viewport.set_size_request (61, 61);
  75
  76         panning_viewport.set_name (X_("BaseFrame"));
  77
  78         ARDOUR_UI::instance()->tooltips().set_tip (panning_link_button,
  79                                                    _("panning link control"));
  80         ARDOUR_UI::instance()->tooltips().set_tip (panning_link_direction_button,
  81                                                    _("panning link direction"));
  82
  83         pan_automation_style_button.unset_flags (Gtk::CAN_FOCUS);
  84         pan_automation_state_button.unset_flags (Gtk::CAN_FOCUS);
  85
  86         using namespace Menu_Helpers;
  87         pan_astate_menu.items().push_back (MenuElem (_("Off"),
  88                                                      bind (mem_fun (_io->panner(), &Panner::set_automation_state), (AutoState) Off)));
  89         pan_astate_menu.items().push_back (MenuElem (_("Play"),
  90                                                      bind (mem_fun (_io->panner(), &Panner::set_automation_state), (AutoState) Play)));
  91         pan_astate_menu.items().push_back (MenuElem (_("Write"),
  92                                                      bind (mem_fun (_io->panner(), &Panner::set_automation_state), (AutoState) Write)));
  93         pan_astate_menu.items().push_back (MenuElem (_("Touch"),
  94                                                      bind (mem_fun (_io->panner(), &Panner::set_automation_state), (AutoState) Touch)));
  95
  96         pan_astyle_menu.items().push_back (MenuElem (_("Trim")));
  97         pan_astyle_menu.items().push_back (MenuElem (_("Abs")));
  98
  99         pan_astate_menu.set_name ("ArdourContextMenu");
 100         pan_astyle_menu.set_name ("ArdourContextMenu");
 101
 102         pan_automation_style_button.signal_button_press_event().connect (mem_fun(*this, &PannerUI::pan_automation_style_button_event), false);
 103         pan_automation_state_button.signal_button_press_event().connect (mem_fun(*this, &PannerUI::pan_automation_state_button_event), false);
 104
 105         panning_link_button.set_name (X_("PanningLinkButton"));
 106         panning_link_direction_button.set_name (X_("PanningLinkDirectionButton"));
 107
 108         panning_link_box.pack_start (panning_link_button, true, true);
 109         panning_link_box.pack_start (panning_link_direction_button, true, true);
 110         panning_link_box.pack_start (pan_automation_state_button, true, true);
 111
 112         /* the pixmap will be reset at some point, but the key thing is that
 113            we need a pixmap in the button just to get started.
 114         */
 115         panning_link_direction_button.add (*(manage (new Image (get_xpm("forwardblarrow.xpm")))));
 116
 117         panning_link_direction_button.signal_clicked().connect
 118                 (mem_fun(*this, &PannerUI::panning_link_direction_clicked));
 119
 120         panning_link_button.signal_button_press_event().connect
 121                 (mem_fun(*this, &PannerUI::panning_link_button_press), false);
 122         panning_link_button.signal_button_release_event().connect
 123                 (mem_fun(*this, &PannerUI::panning_link_button_release), false);
 124
 125         panning_up.set_border_width (3);
 126         panning_down.set_border_width (3);
 127         panning_up.add (panning_up_arrow);
 128         panning_down.add (panning_down_arrow);
 129         panning_up.set_name (X_("PanScrollerBase"));
 130         panning_down.set_name (X_("PanScrollerBase"));
 131         panning_up_arrow.set_name (X_("PanScrollerArrow"));
 132         panning_down_arrow.set_name (X_("PanScrollerArrow"));
 133
 134         pan_vbox.set_spacing (4);
 135         pan_vbox.pack_start (panning_viewport, Gtk::PACK_SHRINK);
 136         pan_vbox.pack_start (panning_link_box, Gtk::PACK_SHRINK);
 137
 138         pack_start (pan_vbox, true, false);
 139
 140         panner = 0;
 141
 142         set_width(Narrow);
 143
 144         _io->panner().Changed.connect (mem_fun(*this, &PannerUI::panner_changed));
 145         _io->panner().LinkStateChanged.connect (mem_fun(*this, &PannerUI::update_pan_linkage));
 146         _io->panner().StateChanged.connect (mem_fun(*this, &PannerUI::update_pan_state));
 147
 148         pan_changed (0);
 149         update_pan_sensitive ();
 150         update_pan_linkage ();
 151         pan_automation_state_changed ();
 152 }
 153
 154 bool
 155 PannerUI::panning_link_button_press (GdkEventButton* ev)
 156 {
 157         cerr << "link press\n";
 158         return true;
 159 }
 160
 161 bool
 162 PannerUI::panning_link_button_release (GdkEventButton* ev)
 163 {
 164         cerr << "link release\n";
 165         if (!ignore_toggle) {
 166                 _io->panner().set_linked (!_io->panner().linked());
 167         }
 168         return true;
 169 }
 170
 171 void
 172 PannerUI::panning_link_direction_clicked()
 173 {
 174         switch (_io->panner().link_direction()) {
 175         case Panner::SameDirection:
 176                 _io->panner().set_link_direction (Panner::OppositeDirection);
 177                 break;
 178         default:
 179                 _io->panner().set_link_direction (Panner::SameDirection);
 180                 break;
 181         }
 182 }
 183
 184 void
 185 PannerUI::update_pan_linkage ()
 186 {
 187         ENSURE_GUI_THREAD(mem_fun(*this, &PannerUI::update_pan_linkage));
 188
 189         bool x = _io->panner().linked();
 190         bool bx = panning_link_button.get_active();
 191
 192         if (x != bx) {
 193
 194                 ignore_toggle = true;
 195                 panning_link_button.set_active (x);
 196                 ignore_toggle = false;
 197         }
 198
 199         panning_link_direction_button.set_sensitive (x);
 200
 201         switch (_io->panner().link_direction()) {
 202         case Panner::SameDirection:
 203                 panning_link_direction_button.set_image (*(manage (new Image (get_xpm ("forwardblarrow.xpm")))));
 204                 break;
 205         default:
 206                 panning_link_direction_button.set_image (*(manage (new Image (get_xpm("revdblarrow.xpm")))));
 207                 break;
 208         }
 209 }
 210
 211 void
 212 PannerUI::set_width (Width w)
 213 {
 214         switch (w) {
 215         case Wide:
 216                 panning_viewport.set_size_request (61, 61);
 217                 if (panner) {
 218                         panner->set_size_request (61, 61);
 219                 }
 220                 for (vector<BarController*>::iterator i = pan_bars.begin(); i != pan_bars.end(); ++i) {
 221                                 (*i)->set_size_request (61, 15);
 222                 }
 223                 panning_link_button.set_label (_("link"));
 224                 break;
 225         case Narrow:
 226                 panning_viewport.set_size_request (31, 61);
 227                 if (panner) {
 228                         panner->set_size_request (31, 61);
 229                 }
 230                 for (vector<BarController*>::iterator i = pan_bars.begin(); i != pan_bars.end(); ++i) {
 231                                 (*i)->set_size_request (31, 15);
 232                 }
 233                 panning_link_button.set_label (_("L"));
 234                 break;
 235         }
 236
 237         _width = w;
 238 }
 239
 240
 241 PannerUI::~PannerUI ()
 242 {
 243         for (vector<Adjustment*>::iterator i = pan_adjustments.begin(); i != pan_adjustments.end(); ++i) {
 244                 delete (*i);
 245         }
 246
 247         for (vector<BarController*>::iterator i = pan_bars.begin(); i != pan_bars.end(); ++i) {
 248                 delete (*i);
 249         }
 250
 251         if (panner) {
 252                 delete panner;
 253         }
 254
 255         if (pan_menu) {
 256                 delete pan_menu;
 257         }
 258
 259 }
 260
 261
 262 void
 263 PannerUI::panner_changed ()
 264 {
 265         ENSURE_GUI_THREAD (mem_fun(*this, &PannerUI::panner_changed));
 266         setup_pan ();
 267 }
 268
 269 void
 270 PannerUI::update_pan_state ()
 271 {
 272         /* currently nothing to do */
 273         // ENSURE_GUI_THREAD (mem_fun(*this, &PannerUI::update_panner_state));
 274 }
 275
 276 void
 277 PannerUI::setup_pan ()
 278 {
 279         uint32_t nouts = _io->n_outputs ();
 280
 281         if (nouts == 0 || nouts == 1) {
 282
 283                 while (!pan_adjustments.empty()) {
 284                         delete pan_bars.back();
 285                         pan_bars.pop_back ();
 286                         delete pan_adjustments.back();
 287                         pan_adjustments.pop_back ();
 288                 }
 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;
 305                         BarController* bc;
 306
 307                         /* initialize adjustment with current value of panner */
 308
 309                         _io->panner()[asz]->get_position (x);
 310
 311                         pan_adjustments.push_back (new Adjustment (x, 0, 1.0, 0.05, 0.1));
 312                         pan_adjustments.back()->signal_value_changed().connect (bind (mem_fun(*this, &PannerUI::pan_adjustment_changed), (uint32_t) asz));
 313
 314                         _io->panner()[asz]->Changed.connect (bind (mem_fun(*this, &PannerUI::pan_value_changed), (uint32_t) asz));
 315
 316                         bc = new BarController (*pan_adjustments[asz],
 317                                                 _io->panner()[asz]->control(),
 318                                                 bind (mem_fun(*this, &PannerUI::pan_printer), pan_adjustments[asz]));
 319
 320                         bc->set_name ("PanSlider");
 321                         bc->set_shadow_type (Gtk::SHADOW_NONE);
 322                         bc->set_style (BarController::Line);
 323
 324                         bc->StartGesture.connect (bind (mem_fun (*_io, &IO::start_pan_touch), (uint32_t) asz));
 325                         bc->StopGesture.connect (bind (mem_fun (*_io, &IO::end_pan_touch), (uint32_t) asz));
 326
 327                         char buf[64];
 328                         snprintf (buf, sizeof (buf), _("panner for channel %zu"), asz + 1);
 329                         ARDOUR_UI::instance()->tooltips().set_tip (bc->event_widget(), buf);
 330
 331                         bc->event_widget().signal_button_release_event().connect
 332                                 (bind (mem_fun(*this, &PannerUI::pan_button_event), (uint32_t) asz));
 333
 334                         pan_bars.push_back (bc);
 335                         switch (_width) {
 336                         case Wide:
 337                                 pan_bars.back()->set_size_request (61, 15);
 338                                 break;
 339                         case Narrow:
 340                                 pan_bars.back()->set_size_request (31, 15);
 341                                 break;
 342                         }
 343
 344                         pan_bar_packer.pack_start (*pan_bars.back(), false, false);
 345                 }
 346
 347                 /* now that we actually have the pan bars,
 348                    set their sensitivity based on current
 349                    automation state.
 350                 */
 351
 352                 update_pan_sensitive ();
 353
 354                 panning_viewport.remove ();
 355                 panning_viewport.add (pan_bar_packer);
 356                 panning_viewport.show_all ();
 357
 358         } else {
 359
 360                 int w = 0;
 361
 362                 switch (_width) {
 363                 case Wide:
 364                         w = 61;
 365                         break;
 366                 case Narrow:
 367                         w = 31;
 368                         break;
 369                 }
 370
 371                 if (panner == 0) {
 372                         panner = new Panner2d (_io->panner(), w, 61);
 373                         panner->set_name ("MixerPanZone");
 374                         panner->show ();
 375                 }
 376
 377                 update_pan_sensitive ();
 378                 panner->reset (_io->n_inputs());
 379                 panner->set_size_request (w, 61);
 380
 381                 /* and finally, add it to the panner frame */
 382
 383                 panning_viewport.remove ();
 384                 panning_viewport.add (*panner);
 385                 panning_viewport.show_all ();
 386         }
 387 }
 388
 389 bool
 390 PannerUI::pan_button_event (GdkEventButton* ev, uint32_t which)
 391 {
 392         switch (ev->button) {
 393         case 3:
 394                 if (pan_menu == 0) {
 395                         pan_menu = manage (new Menu);
 396                         pan_menu->set_name ("ArdourContextMenu");
 397                 }
 398                 build_pan_menu (which);
 399                 pan_menu->popup (1, ev->time);
 400                 return true;
 401                 break;
 402         default:
 403                 return false;
 404         }
 405
 406         return false; // what's wrong with gcc?
 407 }
 408
 409 void
 410 PannerUI::build_pan_menu (uint32_t which)
 411 {
 412         using namespace Menu_Helpers;
 413         MenuList& items (pan_menu->items());
 414
 415         items.clear ();
 416
 417         items.push_back (CheckMenuElem (_("Mute")));
 418
 419         /* set state first, connect second */
 420
 421         (dynamic_cast<CheckMenuItem*> (&items.back()))->set_active (_io->panner()[which]->muted());
 422         (dynamic_cast<CheckMenuItem*> (&items.back()))->signal_toggled().connect
 423                 (bind (mem_fun(*this, &PannerUI::pan_mute), which));
 424
 425         items.push_back (CheckMenuElem (_("Bypass"), mem_fun(*this, &PannerUI::pan_bypass_toggle)));
 426         bypass_menu_item = static_cast<CheckMenuItem*> (&items.back());
 427
 428         /* set state first, connect second */
 429
 430         bypass_menu_item->set_active (_io->panner().bypassed());
 431         bypass_menu_item->signal_toggled().connect (mem_fun(*this, &PannerUI::pan_bypass_toggle));
 432
 433         items.push_back (MenuElem (_("Reset"), mem_fun(*this, &PannerUI::pan_reset)));
 434         items.push_back (SeparatorElem());
 435         items.push_back (MenuElem (_("Reset all")));
 436 }
 437
 438 void
 439 PannerUI::pan_mute (uint32_t which)
 440 {
 441         StreamPanner* sp = _io->panner()[which];
 442         sp->set_muted (!sp->muted());
 443 }
 444
 445 void
 446 PannerUI::pan_bypass_toggle ()
 447 {
 448         if (bypass_menu_item && (_io->panner().bypassed() != bypass_menu_item->get_active())) {
 449                 _io->panner().set_bypassed (!_io->panner().bypassed());
 450         }
 451 }
 452
 453 void
 454 PannerUI::pan_reset ()
 455 {
 456 }
 457
 458 void
 459 PannerUI::effective_pan_display ()
 460 {
 461         if (_io->panner().empty()) {
 462                 return;
 463         }
 464
 465         switch (_io->n_outputs()) {
 466         case 0:
 467         case 1:
 468                 /* relax */
 469                 break;
 470
 471         case 2:
 472                 update_pan_bars (true);
 473                 break;
 474
 475         default:
 476                 //panner->move_puck (pan_value (v, right), 0.5);
 477                 break;
 478         }
 479 }
 480
 481 void
 482 PannerUI::pan_changed (void *src)
 483 {
 484         if (src == this) {
 485                 return;
 486         }
 487
 488         switch (_io->panner().size()) {
 489         case 0:
 490                 panning_link_direction_button.set_sensitive (false);
 491                 panning_link_button.set_sensitive (false);
 492                 return;
 493         case 1:
 494                 panning_link_direction_button.set_sensitive (false);
 495                 panning_link_button.set_sensitive (false);
 496                 break;
 497         default:
 498                 panning_link_direction_button.set_sensitive (true);
 499                 panning_link_button.set_sensitive (true);
 500         }
 501
 502         uint32_t nouts = _io->n_outputs();
 503
 504         switch (nouts) {
 505         case 0:
 506         case 1:
 507                 /* relax */
 508                 break;
 509
 510         case 2:
 511                 update_pan_bars (false);
 512                 break;
 513
 514         default:
 515                 // panner->move_puck (pan_value (pans[0], pans[1]), 0.5);
 516                 break;
 517         }
 518 }
 519
 520 void
 521 PannerUI::pan_adjustment_changed (uint32_t which)
 522 {
 523         if (!in_pan_update && which < _io->panner().size()) {
 524
 525                 float xpos;
 526                 float val = pan_adjustments[which]->get_value ();
 527                 _io->panner()[which]->get_position (xpos);
 528
 529                 /* add a kinda-sorta detent for the middle */
 530
 531                 if (val != 0.5 && Panner::equivalent (val, 0.5)) {
 532                         /* this is going to be reentrant, so just
 533                            return after it.
 534                         */
 535
 536                         in_pan_update = true;
 537                         pan_adjustments[which]->set_value (0.5);
 538                         in_pan_update = false;
 539                         return;
 540                 }
 541
 542                 if (!Panner::equivalent (val, xpos)) {
 543
 544                         _io->panner()[which]->set_position (val);
 545                         /* XXX
 546                            the panner objects have no access to the session,
 547                            so do this here. ick.
 548                         */
 549                         _session.set_dirty();
 550                 }
 551         }
 552 }
 553
 554 void
 555 PannerUI::pan_value_changed (uint32_t which)
 556 {
 557         ENSURE_GUI_THREAD (bind (mem_fun(*this, &PannerUI::pan_value_changed), which));
 558
 559         if (_io->n_outputs() > 1 && which < _io->panner().size()) {
 560                 float xpos;
 561                 float val = pan_adjustments[which]->get_value ();
 562
 563                 _io->panner()[which]->get_position (xpos);
 564
 565                 if (!Panner::equivalent (val, xpos)) {
 566                         in_pan_update = true;
 567                         pan_adjustments[which]->set_value (xpos);
 568                         in_pan_update = false;
 569                 }
 570         }
 571 }
 572
 573 void
 574 PannerUI::update_pan_bars (bool only_if_aplay)
 575 {
 576         uint32_t n;
 577         vector<Adjustment*>::iterator i;
 578
 579         in_pan_update = true;
 580
 581         /* this runs during automation playback, and moves the bar controllers
 582            and/or pucks around.
 583         */
 584
 585         for (i = pan_adjustments.begin(), n = 0; i != pan_adjustments.end(); ++i, ++n) {
 586                 float xpos, val;
 587
 588                 if (only_if_aplay) {
 589                         AutomationList& alist (_io->panner()[n]->automation());
 590
 591                         if (!alist.automation_playback()) {
 592                                 continue;
 593                         }
 594                 }
 595
 596                 _io->panner()[n]->get_effective_position (xpos);
 597                 val = (*i)->get_value ();
 598
 599                 if (!Panner::equivalent (val, xpos)) {
 600                         (*i)->set_value (xpos);
 601                 }
 602         }
 603
 604         in_pan_update = false;
 605 }
 606
 607 void
 608 PannerUI::pan_printer (char *buf, uint32_t len, Adjustment* adj)
 609 {
 610         float val = adj->get_value();
 611
 612         if (val == 0.0f) {
 613                 snprintf (buf, len, X_("L"));
 614         } else if (val == 1.0f) {
 615                 snprintf (buf, len, X_("R"));
 616         } else if (Panner::equivalent (val, 0.5f)) {
 617                 snprintf (buf, len, X_("C"));
 618         } else {
 619                 /* don't print anything */
 620                 buf[0] = '\0';
 621         }
 622 }
 623
 624 void
 625 PannerUI::update_pan_sensitive ()
 626 {
 627         bool sensitive = !(_io->panner().automation_state() & Play);
 628
 629         switch (_io->n_outputs()) {
 630         case 0:
 631         case 1:
 632                 break;
 633         case 2:
 634                 for (vector<BarController*>::iterator i = pan_bars.begin(); i != pan_bars.end(); ++i) {
 635                         (*i)->set_sensitive (sensitive);
 636                 }
 637                 break;
 638         default:
 639                 if (panner) {
 640                         panner->set_sensitive (sensitive);
 641                 }
 642                 break;
 643         }
 644 }
 645
 646 gint
 647 PannerUI::pan_automation_state_button_event (GdkEventButton *ev)
 648 {
 649         using namespace Menu_Helpers;
 650
 651         if (ev->type == GDK_BUTTON_RELEASE) {
 652                 return TRUE;
 653         }
 654
 655         switch (ev->button) {
 656         case 1:
 657                 pan_astate_menu.popup (1, ev->time);
 658                 break;
 659         default:
 660                 break;
 661         }
 662
 663         return TRUE;
 664 }
 665
 666 gint
 667 PannerUI::pan_automation_style_button_event (GdkEventButton *ev)
 668 {
 669         if (ev->type == GDK_BUTTON_RELEASE) {
 670                 return TRUE;
 671         }
 672
 673         switch (ev->button) {
 674         case 1:
 675                 pan_astyle_menu.popup (1, ev->time);
 676                 break;
 677         default:
 678                 break;
 679         }
 680         return TRUE;
 681 }
 682
 683 void
 684 PannerUI::pan_automation_style_changed ()
 685 {
 686         ENSURE_GUI_THREAD(mem_fun(*this, &PannerUI::pan_automation_style_changed));
 687
 688         switch (_width) {
 689         case Wide:
 690                 pan_automation_style_button.set_label (astyle_string(_io->panner().automation_style()));
 691                 break;
 692         case Narrow:
 693                 pan_automation_style_button.set_label (short_astyle_string(_io->panner().automation_style()));
 694                 break;
 695         }
 696 }
 697
 698 void
 699 PannerUI::pan_automation_state_changed ()
 700 {
 701         ENSURE_GUI_THREAD(mem_fun(*this, &PannerUI::pan_automation_state_changed));
 702
 703         bool x;
 704
 705         switch (_width) {
 706         case Wide:
 707           pan_automation_state_button.set_label (astate_string(_io->panner().automation_state()));
 708                 break;
 709         case Narrow:
 710           pan_automation_state_button.set_label (short_astate_string(_io->panner().automation_state()));
 711                 break;
 712         }
 713
 714         /* when creating a new session, we get to create busses (and
 715            sometimes tracks) with no outputs by the time they get
 716            here.
 717         */
 718
 719         if (_io->panner().empty()) {
 720                 return;
 721         }
 722
 723         x = (_io->panner().front()->automation().automation_state() != Off);
 724
 725         if (pan_automation_state_button.get_active() != x) {
 726         ignore_toggle = true;
 727                 pan_automation_state_button.set_active (x);
 728                 ignore_toggle = false;
 729         }
 730
 731         update_pan_sensitive ();
 732
 733         /* start watching automation so that things move */
 734
 735         pan_watching.disconnect();
 736
 737         if (x) {
 738           pan_watching = ARDOUR_UI::RapidScreenUpdate.connect (mem_fun (*this, &PannerUI::effective_pan_display));
 739         }
 740 }
 741
 742 string
 743 PannerUI::astate_string (AutoState state)
 744 {
 745         return _astate_string (state, false);
 746 }
 747
 748 string
 749 PannerUI::short_astate_string (AutoState state)
 750 {
 751         return _astate_string (state, true);
 752 }
 753
 754 string
 755 PannerUI::_astate_string (AutoState state, bool shrt)
 756 {
 757         string sstr;
 758
 759         switch (state) {
 760         case Off:
 761                 sstr = (shrt ? "O" : _("O"));
 762                 break;
 763         case Play:
 764                 sstr = (shrt ? "P" : _("P"));
 765                 break;
 766         case Touch:
 767                 sstr = (shrt ? "T" : _("T"));
 768                 break;
 769         case Write:
 770                 sstr = (shrt ? "W" : _("W"));
 771                 break;
 772         }
 773
 774         return sstr;
 775 }
 776
 777 string
 778 PannerUI::astyle_string (AutoStyle style)
 779 {
 780         return _astyle_string (style, false);
 781 }
 782
 783 string
 784 PannerUI::short_astyle_string (AutoStyle style)
 785 {
 786         return _astyle_string (style, true);
 787 }
 788
 789 string
 790 PannerUI::_astyle_string (AutoStyle style, bool shrt)
 791 {
 792         if (style & Trim) {
 793                 return _("Trim");
 794         } else {
 795                 /* XXX it might different in different languages */
 796
 797                 return (shrt ? _("Abs") : _("Abs"));
 798         }
 799 }