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
  49 PannerUI::PannerUI (boost::shared_ptr<IO> io, Session& s)
  50         : _io (io),
  51           _session (s),
  52           hAdjustment(0.0, 0.0, 0.0),
  53           vAdjustment(0.0, 0.0, 0.0),
  54           panning_viewport(hAdjustment, vAdjustment),
  55           panning_up_arrow (Gtk::ARROW_UP, Gtk::SHADOW_OUT),
  56           panning_down_arrow (Gtk::ARROW_DOWN, Gtk::SHADOW_OUT),
  57           panning_link_button (_("link")),
  58           pan_automation_style_button (""),
  59           pan_automation_state_button ("")
  60 {
  61         ignore_toggle = false;
  62         pan_menu = 0;
  63         in_pan_update = false;
  64
  65         pan_automation_style_button.set_name ("MixerAutomationModeButton");
  66         pan_automation_state_button.set_name ("MixerAutomationPlaybackButton");
  67
  68         ARDOUR_UI::instance()->tooltips().set_tip (pan_automation_state_button, _("Pan automation mode"));
  69         ARDOUR_UI::instance()->tooltips().set_tip (pan_automation_style_button, _("Pan automation type"));
  70
  71         //set_size_request_to_display_given_text (pan_automation_state_button, X_("O"), 2, 2);
  72         //set_size_request_to_display_given_text (pan_automation_style_button, X_("0"), 2, 2);
  73
  74         pan_bar_packer.set_size_request (-1, 61);
  75         panning_viewport.set_size_request (61, 61);
  76
  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 (_("Off"),
  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 (4);
 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, false);
 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 bool
 156 PannerUI::panning_link_button_press (GdkEventButton* ev)
 157 {
 158         cerr << "link press\n";
 159         return true;
 160 }
 161
 162 bool
 163 PannerUI::panning_link_button_release (GdkEventButton* ev)
 164 {
 165         cerr << "link release\n";
 166         if (!ignore_toggle) {
 167                 _io->panner().set_linked (!_io->panner().linked());
 168         }
 169         return true;
 170 }
 171
 172 void
 173 PannerUI::panning_link_direction_clicked()
 174 {
 175         switch (_io->panner().link_direction()) {
 176         case Panner::SameDirection:
 177                 _io->panner().set_link_direction (Panner::OppositeDirection);
 178                 break;
 179         default:
 180                 _io->panner().set_link_direction (Panner::SameDirection);
 181                 break;
 182         }
 183 }
 184
 185 void
 186 PannerUI::update_pan_linkage ()
 187 {
 188         ENSURE_GUI_THREAD(mem_fun(*this, &PannerUI::update_pan_linkage));
 189
 190         bool x = _io->panner().linked();
 191         bool bx = panning_link_button.get_active();
 192
 193         if (x != bx) {
 194
 195                 ignore_toggle = true;
 196                 panning_link_button.set_active (x);
 197                 ignore_toggle = false;
 198         }
 199
 200         panning_link_direction_button.set_sensitive (x);
 201
 202         switch (_io->panner().link_direction()) {
 203         case Panner::SameDirection:
 204                 panning_link_direction_button.set_image (*(manage (new Image (get_xpm ("forwardblarrow.xpm")))));
 205                 break;
 206         default:
 207                 panning_link_direction_button.set_image (*(manage (new Image (get_xpm("revdblarrow.xpm")))));
 208                 break;
 209         }
 210 }
 211
 212 void
 213 PannerUI::set_width (Width w)
 214 {
 215         switch (w) {
 216         case Wide:
 217                 panning_viewport.set_size_request (61, 61);
 218                 if (panner) {
 219                         panner->set_size_request (61, 61);
 220                 }
 221                 for (vector<PannerBar*>::iterator i = pan_bars.begin(); i != pan_bars.end(); ++i) {
 222                                 (*i)->set_size_request (61, 15);
 223                 }
 224                 panning_link_button.set_label (_("link"));
 225                 break;
 226         case Narrow:
 227                 panning_viewport.set_size_request (31, 61);
 228                 if (panner) {
 229                         panner->set_size_request (31, 61);
 230                 }
 231                 for (vector<PannerBar*>::iterator i = pan_bars.begin(); i != pan_bars.end(); ++i) {
 232                                 (*i)->set_size_request (31, 15);
 233                 }
 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 ();
 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         } else if (nouts == 2) {
 292
 293                 vector<Adjustment*>::size_type asz;
 294                 uint32_t npans = _io->panner().size();
 295
 296                 while (!pan_adjustments.empty()) {
 297                         delete pan_bars.back();
 298                         pan_bars.pop_back ();
 299                         delete pan_adjustments.back();
 300                         pan_adjustments.pop_back ();
 301                 }
 302
 303                 while ((asz = pan_adjustments.size()) < npans) {
 304
 305                         float x;
 306                         PannerBar* bc;
 307
 308                         /* initialize adjustment with current value of panner */
 309
 310                         _io->panner()[asz]->get_position (x);
 311
 312                         pan_adjustments.push_back (new Adjustment (x, 0, 1.0, 0.05, 0.1));
 313                         pan_adjustments.back()->signal_value_changed().connect (bind (mem_fun(*this, &PannerUI::pan_adjustment_changed), (uint32_t) asz));
 314
 315                         _io->panner()[asz]->Changed.connect (bind (mem_fun(*this, &PannerUI::pan_value_changed), (uint32_t) asz));
 316
 317                         bc = new PannerBar (*pan_adjustments[asz], _io->panner()[asz]->control());
 318
 319                         bc->set_name ("PanSlider");
 320                         bc->set_shadow_type (Gtk::SHADOW_NONE);
 321                         bc->set_style (BarController::Line);
 322
 323                         bc->StartGesture.connect (bind (mem_fun (*_io, &IO::start_pan_touch), (uint32_t) asz));
 324                         bc->StopGesture.connect (bind (mem_fun (*_io, &IO::end_pan_touch), (uint32_t) asz));
 325
 326                         char buf[64];
 327                         snprintf (buf, sizeof (buf), _("panner for channel %zu"), asz + 1);
 328                         ARDOUR_UI::instance()->tooltips().set_tip (bc->event_widget(), buf);
 329
 330                         bc->event_widget().signal_button_release_event().connect
 331                                 (bind (mem_fun(*this, &PannerUI::pan_button_event), (uint32_t) asz));
 332
 333                         pan_bars.push_back (bc);
 334                         switch (_width) {
 335                         case Wide:
 336                                 pan_bars.back()->set_size_request (61, 15);
 337                                 break;
 338                         case Narrow:
 339                                 pan_bars.back()->set_size_request (31, 15);
 340                                 break;
 341                         }
 342
 343                         pan_bar_packer.pack_start (*pan_bars.back(), true, true);
 344                 }
 345
 346                 /* now that we actually have the pan bars,
 347                    set their sensitivity based on current
 348                    automation state.
 349                 */
 350
 351                 update_pan_sensitive ();
 352
 353                 panning_viewport.remove ();
 354                 panning_viewport.add (pan_bar_packer);
 355                 panning_viewport.show_all ();
 356
 357         } else {
 358
 359                 int w = 0;
 360
 361                 switch (_width) {
 362                 case Wide:
 363                         w = 61;
 364                         break;
 365                 case Narrow:
 366                         w = 31;
 367                         break;
 368                 }
 369
 370                 if (panner == 0) {
 371                         panner = new Panner2d (_io->panner(), w, 61);
 372                         panner->set_name ("MixerPanZone");
 373                         panner->show ();
 374                 }
 375
 376                 update_pan_sensitive ();
 377                 panner->reset (_io->n_inputs());
 378                 panner->set_size_request (w, 61);
 379
 380                 /* and finally, add it to the panner frame */
 381
 382                 panning_viewport.remove ();
 383                 panning_viewport.add (*panner);
 384                 panning_viewport.show_all ();
 385         }
 386 }
 387
 388 bool
 389 PannerUI::pan_button_event (GdkEventButton* ev, uint32_t which)
 390 {
 391         switch (ev->button) {
 392         case 3:
 393                 if (pan_menu == 0) {
 394                         pan_menu = manage (new Menu);
 395                         pan_menu->set_name ("ArdourContextMenu");
 396                 }
 397                 build_pan_menu (which);
 398                 pan_menu->popup (1, ev->time);
 399                 return true;
 400                 break;
 401         default:
 402                 return false;
 403         }
 404
 405         return false; // what's wrong with gcc?
 406 }
 407
 408 void
 409 PannerUI::build_pan_menu (uint32_t which)
 410 {
 411         using namespace Menu_Helpers;
 412         MenuList& items (pan_menu->items());
 413
 414         items.clear ();
 415
 416         items.push_back (CheckMenuElem (_("Mute")));
 417
 418         /* set state first, connect second */
 419
 420         (dynamic_cast<CheckMenuItem*> (&items.back()))->set_active (_io->panner()[which]->muted());
 421         (dynamic_cast<CheckMenuItem*> (&items.back()))->signal_toggled().connect
 422                 (bind (mem_fun(*this, &PannerUI::pan_mute), which));
 423
 424         items.push_back (CheckMenuElem (_("Bypass"), mem_fun(*this, &PannerUI::pan_bypass_toggle)));
 425         bypass_menu_item = static_cast<CheckMenuItem*> (&items.back());
 426
 427         /* set state first, connect second */
 428
 429         bypass_menu_item->set_active (_io->panner().bypassed());
 430         bypass_menu_item->signal_toggled().connect (mem_fun(*this, &PannerUI::pan_bypass_toggle));
 431
 432         items.push_back (MenuElem (_("Reset"), mem_fun(*this, &PannerUI::pan_reset)));
 433         items.push_back (SeparatorElem());
 434         items.push_back (MenuElem (_("Reset all")));
 435 }
 436
 437 void
 438 PannerUI::pan_mute (uint32_t which)
 439 {
 440         StreamPanner* sp = _io->panner()[which];
 441         sp->set_muted (!sp->muted());
 442 }
 443
 444 void
 445 PannerUI::pan_bypass_toggle ()
 446 {
 447         if (bypass_menu_item && (_io->panner().bypassed() != bypass_menu_item->get_active())) {
 448                 _io->panner().set_bypassed (!_io->panner().bypassed());
 449         }
 450 }
 451
 452 void
 453 PannerUI::pan_reset ()
 454 {
 455 }
 456
 457 void
 458 PannerUI::effective_pan_display ()
 459 {
 460         if (_io->panner().empty()) {
 461                 return;
 462         }
 463
 464         switch (_io->n_outputs()) {
 465         case 0:
 466         case 1:
 467                 /* relax */
 468                 break;
 469
 470         case 2:
 471                 update_pan_bars (true);
 472                 break;
 473
 474         default:
 475                 //panner->move_puck (pan_value (v, right), 0.5);
 476                 break;
 477         }
 478 }
 479
 480 void
 481 PannerUI::pan_changed (void *src)
 482 {
 483         if (src == this) {
 484                 return;
 485         }
 486
 487         switch (_io->panner().size()) {
 488         case 0:
 489                 panning_link_direction_button.set_sensitive (false);
 490                 panning_link_button.set_sensitive (false);
 491                 return;
 492         case 1:
 493                 panning_link_direction_button.set_sensitive (false);
 494                 panning_link_button.set_sensitive (false);
 495                 break;
 496         default:
 497                 panning_link_direction_button.set_sensitive (true);
 498                 panning_link_button.set_sensitive (true);
 499         }
 500
 501         uint32_t nouts = _io->n_outputs();
 502
 503         switch (nouts) {
 504         case 0:
 505         case 1:
 506                 /* relax */
 507                 break;
 508
 509         case 2:
 510                 update_pan_bars (false);
 511                 break;
 512
 513         default:
 514                 // panner->move_puck (pan_value (pans[0], pans[1]), 0.5);
 515                 break;
 516         }
 517 }
 518
 519 void
 520 PannerUI::pan_adjustment_changed (uint32_t which)
 521 {
 522         if (!in_pan_update && which < _io->panner().size()) {
 523
 524                 float xpos;
 525                 float val = pan_adjustments[which]->get_value ();
 526                 _io->panner()[which]->get_position (xpos);
 527
 528                 /* add a kinda-sorta detent for the middle */
 529
 530                 if (val != 0.5 && Panner::equivalent (val, 0.5)) {
 531                         /* this is going to be reentrant, so just
 532                            return after it.
 533                         */
 534
 535                         in_pan_update = true;
 536                         pan_adjustments[which]->set_value (0.5);
 537                         in_pan_update = false;
 538                         return;
 539                 }
 540
 541                 if (!Panner::equivalent (val, xpos)) {
 542
 543                         _io->panner()[which]->set_position (val);
 544                         /* XXX
 545                            the panner objects have no access to the session,
 546                            so do this here. ick.
 547                         */
 548                         _session.set_dirty();
 549                 }
 550         }
 551 }
 552
 553 void
 554 PannerUI::pan_value_changed (uint32_t which)
 555 {
 556         ENSURE_GUI_THREAD (bind (mem_fun(*this, &PannerUI::pan_value_changed), which));
 557
 558         if (_io->n_outputs() > 1 && which < _io->panner().size()) {
 559                 float xpos;
 560                 float val = pan_adjustments[which]->get_value ();
 561
 562                 _io->panner()[which]->get_position (xpos);
 563
 564                 if (!Panner::equivalent (val, xpos)) {
 565                         in_pan_update = true;
 566                         pan_adjustments[which]->set_value (xpos);
 567                         in_pan_update = false;
 568                 }
 569         }
 570 }
 571
 572 void
 573 PannerUI::update_pan_bars (bool only_if_aplay)
 574 {
 575         uint32_t n;
 576         vector<Adjustment*>::iterator i;
 577
 578         in_pan_update = true;
 579
 580         /* this runs during automation playback, and moves the bar controllers
 581            and/or pucks around.
 582         */
 583
 584         for (i = pan_adjustments.begin(), n = 0; i != pan_adjustments.end(); ++i, ++n) {
 585                 float xpos, val;
 586
 587                 if (only_if_aplay) {
 588                         AutomationList& alist (_io->panner()[n]->automation());
 589
 590                         if (!alist.automation_playback()) {
 591                                 continue;
 592                         }
 593                 }
 594
 595                 _io->panner()[n]->get_effective_position (xpos);
 596                 val = (*i)->get_value ();
 597
 598                 if (!Panner::equivalent (val, xpos)) {
 599                         (*i)->set_value (xpos);
 600                 }
 601         }
 602
 603         in_pan_update = false;
 604 }
 605
 606 void
 607 PannerUI::pan_printer (char *buf, uint32_t len, Adjustment* adj)
 608 {
 609         float val = adj->get_value();
 610
 611         if (val == 0.0f) {
 612                 snprintf (buf, len, X_("L"));
 613         } else if (val == 1.0f) {
 614                 snprintf (buf, len, X_("R"));
 615         } else if (Panner::equivalent (val, 0.5f)) {
 616                 snprintf (buf, len, X_("C"));
 617         } else {
 618                 /* don't print anything */
 619                 buf[0] = '\0';
 620         }
 621 }
 622
 623 void
 624 PannerUI::update_pan_sensitive ()
 625 {
 626         bool sensitive = !(_io->panner().automation_state() & Play);
 627
 628         switch (_io->n_outputs()) {
 629         case 0:
 630         case 1:
 631                 break;
 632         case 2:
 633                 for (vector<PannerBar*>::iterator i = pan_bars.begin(); i != pan_bars.end(); ++i) {
 634                         (*i)->set_sensitive (sensitive);
 635                 }
 636                 break;
 637         default:
 638                 if (panner) {
 639                         panner->set_sensitive (sensitive);
 640                 }
 641                 break;
 642         }
 643 }
 644
 645 gint
 646 PannerUI::pan_automation_state_button_event (GdkEventButton *ev)
 647 {
 648         using namespace Menu_Helpers;
 649
 650         if (ev->type == GDK_BUTTON_RELEASE) {
 651                 return TRUE;
 652         }
 653
 654         switch (ev->button) {
 655         case 1:
 656                 pan_astate_menu.popup (1, ev->time);
 657                 break;
 658         default:
 659                 break;
 660         }
 661
 662         return TRUE;
 663 }
 664
 665 gint
 666 PannerUI::pan_automation_style_button_event (GdkEventButton *ev)
 667 {
 668         if (ev->type == GDK_BUTTON_RELEASE) {
 669                 return TRUE;
 670         }
 671
 672         switch (ev->button) {
 673         case 1:
 674                 pan_astyle_menu.popup (1, ev->time);
 675                 break;
 676         default:
 677                 break;
 678         }
 679         return TRUE;
 680 }
 681
 682 void
 683 PannerUI::pan_automation_style_changed ()
 684 {
 685         ENSURE_GUI_THREAD(mem_fun(*this, &PannerUI::pan_automation_style_changed));
 686
 687         switch (_width) {
 688         case Wide:
 689                 pan_automation_style_button.set_label (astyle_string(_io->panner().automation_style()));
 690                 break;
 691         case Narrow:
 692                 pan_automation_style_button.set_label (short_astyle_string(_io->panner().automation_style()));
 693                 break;
 694         }
 695 }
 696
 697 void
 698 PannerUI::pan_automation_state_changed ()
 699 {
 700         ENSURE_GUI_THREAD(mem_fun(*this, &PannerUI::pan_automation_state_changed));
 701
 702         bool x;
 703
 704         switch (_width) {
 705         case Wide:
 706           pan_automation_state_button.set_label (astate_string(_io->panner().automation_state()));
 707                 break;
 708         case Narrow:
 709           pan_automation_state_button.set_label (short_astate_string(_io->panner().automation_state()));
 710                 break;
 711         }
 712
 713         /* when creating a new session, we get to create busses (and
 714            sometimes tracks) with no outputs by the time they get
 715            here.
 716         */
 717
 718         if (_io->panner().empty()) {
 719                 return;
 720         }
 721
 722         x = (_io->panner().front()->automation().automation_state() != Off);
 723
 724         if (pan_automation_state_button.get_active() != x) {
 725         ignore_toggle = true;
 726                 pan_automation_state_button.set_active (x);
 727                 ignore_toggle = false;
 728         }
 729
 730         update_pan_sensitive ();
 731
 732         /* start watching automation so that things move */
 733
 734         pan_watching.disconnect();
 735
 736         if (x) {
 737           pan_watching = ARDOUR_UI::RapidScreenUpdate.connect (mem_fun (*this, &PannerUI::effective_pan_display));
 738         }
 739 }
 740
 741 string
 742 PannerUI::astate_string (AutoState state)
 743 {
 744         return _astate_string (state, false);
 745 }
 746
 747 string
 748 PannerUI::short_astate_string (AutoState state)
 749 {
 750         return _astate_string (state, true);
 751 }
 752
 753 string
 754 PannerUI::_astate_string (AutoState state, bool shrt)
 755 {
 756         string sstr;
 757
 758         switch (state) {
 759         case Off:
 760                 sstr = (shrt ? "O" : _("O"));
 761                 break;
 762         case Play:
 763                 sstr = (shrt ? "P" : _("P"));
 764                 break;
 765         case Touch:
 766                 sstr = (shrt ? "T" : _("T"));
 767                 break;
 768         case Write:
 769                 sstr = (shrt ? "W" : _("W"));
 770                 break;
 771         }
 772
 773         return sstr;
 774 }
 775
 776 string
 777 PannerUI::astyle_string (AutoStyle style)
 778 {
 779         return _astyle_string (style, false);
 780 }
 781
 782 string
 783 PannerUI::short_astyle_string (AutoStyle style)
 784 {
 785         return _astyle_string (style, true);
 786 }
 787
 788 string
 789 PannerUI::_astyle_string (AutoStyle style, bool shrt)
 790 {
 791         if (style & Trim) {
 792                 return _("Trim");
 793         } else {
 794                 /* XXX it might different in different languages */
 795
 796                 return (shrt ? _("Abs") : _("Abs"));
 797         }
 798 }