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   $Id$
  19 */
  20
  21 #include <limits.h>
  22
  23 #include <ardour/io.h>
  24 #include <ardour/dB.h>
  25 #include <gtkmm2ext/utils.h>
  26 #include <gtkmm2ext/stop_signal.h>
  27 #include <gtkmm2ext/barcontroller.h>
  28 #include <midi++/manager.h>
  29 #include <pbd/fastlog.h>
  30
  31 #include "ardour_ui.h"
  32 #include "panner_ui.h"
  33 #include "panner2d.h"
  34 #include "utils.h"
  35 #include "gui_thread.h"
  36
  37 #include <ardour/session.h>
  38 #include <ardour/panner.h>
  39 #include <ardour/route.h>
  40
  41 #include "i18n.h"
  42
  43 using namespace ARDOUR;
  44 using namespace PBD;
  45 using namespace Gtkmm2ext;
  46 using namespace Gtk;
  47 using namespace sigc;
  48
  49
  50 PannerUI::PannerUI (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 (61, 61);
  77
  78         panning_viewport.set_name (X_("BaseFrame"));
  79
  80         ARDOUR_UI::instance()->tooltips().set_tip (panning_link_button,
  81                                                    _("panning link control"));
  82         ARDOUR_UI::instance()->tooltips().set_tip (panning_link_direction_button,
  83                                                    _("panning link direction"));
  84
  85         pan_automation_style_button.unset_flags (Gtk::CAN_FOCUS);
  86         pan_automation_state_button.unset_flags (Gtk::CAN_FOCUS);
  87
  88         using namespace Menu_Helpers;
  89         pan_astate_menu.items().push_back (MenuElem (_("Off"),
  90                                                      bind (mem_fun (_io.panner(), &Panner::set_automation_state), (AutoState) Off)));
  91         pan_astate_menu.items().push_back (MenuElem (_("Play"),
  92                                                      bind (mem_fun (_io.panner(), &Panner::set_automation_state), (AutoState) Play)));
  93         pan_astate_menu.items().push_back (MenuElem (_("Write"),
  94                                                      bind (mem_fun (_io.panner(), &Panner::set_automation_state), (AutoState) Write)));
  95         pan_astate_menu.items().push_back (MenuElem (_("Touch"),
  96                                                      bind (mem_fun (_io.panner(), &Panner::set_automation_state), (AutoState) Touch)));
  97
  98         pan_astyle_menu.items().push_back (MenuElem (_("Trim")));
  99         pan_astyle_menu.items().push_back (MenuElem (_("Abs")));
 100
 101         pan_astate_menu.set_name ("ArdourContextMenu");
 102         pan_astyle_menu.set_name ("ArdourContextMenu");
 103
 104         pan_automation_style_button.signal_button_press_event().connect (mem_fun(*this, &PannerUI::pan_automation_style_button_event), false);
 105         pan_automation_state_button.signal_button_press_event().connect (mem_fun(*this, &PannerUI::pan_automation_state_button_event), false);
 106
 107         panning_link_button.set_name (X_("PanningLinkButton"));
 108         panning_link_direction_button.set_name (X_("PanningLinkDirectionButton"));
 109
 110         panning_link_box.pack_start (panning_link_button, true, true);
 111         panning_link_box.pack_start (panning_link_direction_button, true, true);
 112         panning_link_box.pack_start (pan_automation_state_button, true, true);
 113
 114         /* the pixmap will be reset at some point, but the key thing is that
 115            we need a pixmap in the button just to get started.
 116         */
 117         panning_link_direction_button.add (*(manage (new Image (get_xpm("forwardblarrow.xpm")))));
 118
 119         panning_link_direction_button.signal_clicked().connect
 120                 (mem_fun(*this, &PannerUI::panning_link_direction_clicked));
 121
 122         panning_link_button.signal_button_press_event().connect
 123                 (mem_fun(*this, &PannerUI::panning_link_button_press), false);
 124         panning_link_button.signal_button_release_event().connect
 125                 (mem_fun(*this, &PannerUI::panning_link_button_release), false);
 126
 127         panning_up.set_border_width (3);
 128         panning_down.set_border_width (3);
 129         panning_up.add (panning_up_arrow);
 130         panning_down.add (panning_down_arrow);
 131         panning_up.set_name (X_("PanScrollerBase"));
 132         panning_down.set_name (X_("PanScrollerBase"));
 133         panning_up_arrow.set_name (X_("PanScrollerArrow"));
 134         panning_down_arrow.set_name (X_("PanScrollerArrow"));
 135
 136         pan_vbox.set_spacing (4);
 137         pan_vbox.pack_start (panning_viewport, Gtk::PACK_SHRINK);
 138         pan_vbox.pack_start (panning_link_box, Gtk::PACK_SHRINK);
 139
 140         pack_start (pan_vbox, true, false);
 141
 142         panner = 0;
 143
 144         set_width(Narrow);
 145
 146         _io.panner().Changed.connect (mem_fun(*this, &PannerUI::panner_changed));
 147         _io.panner().LinkStateChanged.connect (mem_fun(*this, &PannerUI::update_pan_linkage));
 148         _io.panner().StateChanged.connect (mem_fun(*this, &PannerUI::update_pan_state));
 149
 150         pan_changed (0);
 151         update_pan_sensitive ();
 152         update_pan_linkage ();
 153         pan_automation_state_changed ();
 154 }
 155
 156 bool
 157 PannerUI::panning_link_button_press (GdkEventButton* ev)
 158 {
 159         cerr << "link press\n";
 160         return true;
 161 }
 162
 163 bool
 164 PannerUI::panning_link_button_release (GdkEventButton* ev)
 165 {
 166         cerr << "link release\n";
 167         if (!ignore_toggle) {
 168                 _io.panner().set_linked (!_io.panner().linked());
 169         }
 170         return true;
 171 }
 172
 173 void
 174 PannerUI::panning_link_direction_clicked()
 175 {
 176         switch (_io.panner().link_direction()) {
 177         case Panner::SameDirection:
 178                 _io.panner().set_link_direction (Panner::OppositeDirection);
 179                 break;
 180         default:
 181                 _io.panner().set_link_direction (Panner::SameDirection);
 182                 break;
 183         }
 184 }
 185
 186 void
 187 PannerUI::update_pan_linkage ()
 188 {
 189         ENSURE_GUI_THREAD(mem_fun(*this, &PannerUI::update_pan_linkage));
 190
 191         bool x = _io.panner().linked();
 192         bool bx = panning_link_button.get_active();
 193
 194         if (x != bx) {
 195
 196                 ignore_toggle = true;
 197                 panning_link_button.set_active (x);
 198                 ignore_toggle = false;
 199         }
 200
 201         panning_link_direction_button.set_sensitive (x);
 202
 203         switch (_io.panner().link_direction()) {
 204         case Panner::SameDirection:
 205                 panning_link_direction_button.set_image (*(manage (new Image (get_xpm ("forwardblarrow.xpm")))));
 206                 break;
 207         default:
 208                 panning_link_direction_button.set_image (*(manage (new Image (get_xpm("revdblarrow.xpm")))));
 209                 break;
 210         }
 211 }
 212
 213 void
 214 PannerUI::set_width (Width w)
 215 {
 216         switch (w) {
 217         case Wide:
 218                 panning_viewport.set_size_request (61, 61);
 219                 if (panner) {
 220                         panner->set_size_request (61, 61);
 221                 }
 222                 for (vector<BarController*>::iterator i = pan_bars.begin(); i != pan_bars.end(); ++i) {
 223                                 (*i)->set_size_request (61, 15);
 224                 }
 225                 panning_link_button.set_label (_("link"));
 226                 break;
 227         case Narrow:
 228                 panning_viewport.set_size_request (31, 61);
 229                 if (panner) {
 230                         panner->set_size_request (31, 61);
 231                 }
 232                 for (vector<BarController*>::iterator i = pan_bars.begin(); i != pan_bars.end(); ++i) {
 233                                 (*i)->set_size_request (31, 15);
 234                 }
 235                 panning_link_button.set_label (_("L"));
 236                 break;
 237         }
 238
 239         _width = w;
 240 }
 241
 242
 243 PannerUI::~PannerUI ()
 244 {
 245         for (vector<Adjustment*>::iterator i = pan_adjustments.begin(); i != pan_adjustments.end(); ++i) {
 246                 delete (*i);
 247         }
 248
 249         for (vector<BarController*>::iterator i = pan_bars.begin(); i != pan_bars.end(); ++i) {
 250                 delete (*i);
 251         }
 252
 253         if (panner) {
 254                 delete panner;
 255         }
 256
 257         if (pan_menu) {
 258                 delete pan_menu;
 259         }
 260
 261 }
 262
 263
 264 void
 265 PannerUI::panner_changed ()
 266 {
 267         ENSURE_GUI_THREAD (mem_fun(*this, &PannerUI::panner_changed));
 268         setup_pan ();
 269 }
 270
 271 void
 272 PannerUI::update_pan_state ()
 273 {
 274         /* currently nothing to do */
 275         // ENSURE_GUI_THREAD (mem_fun(*this, &PannerUI::update_panner_state));
 276 }
 277
 278 void
 279 PannerUI::setup_pan ()
 280 {
 281         uint32_t nouts = _io.n_outputs ();
 282
 283         if (nouts == 0 || nouts == 1) {
 284
 285                 while (!pan_adjustments.empty()) {
 286                         delete pan_bars.back();
 287                         pan_bars.pop_back ();
 288                         delete pan_adjustments.back();
 289                         pan_adjustments.pop_back ();
 290                 }
 291
 292         } else if (nouts == 2) {
 293
 294                 vector<Adjustment*>::size_type asz;
 295                 uint32_t npans = _io.panner().size();
 296
 297                 while (!pan_adjustments.empty()) {
 298                         delete pan_bars.back();
 299                         pan_bars.pop_back ();
 300                         delete pan_adjustments.back();
 301                         pan_adjustments.pop_back ();
 302                 }
 303
 304                 while ((asz = pan_adjustments.size()) < npans) {
 305
 306                         float x;
 307                         BarController* bc;
 308
 309                         /* initialize adjustment with current value of panner */
 310
 311                         _io.panner()[asz]->get_position (x);
 312
 313                         pan_adjustments.push_back (new Adjustment (x, 0, 1.0, 0.05, 0.1));
 314                         pan_adjustments.back()->signal_value_changed().connect (bind (mem_fun(*this, &PannerUI::pan_adjustment_changed), (uint32_t) asz));
 315
 316                         _io.panner()[asz]->Changed.connect (bind (mem_fun(*this, &PannerUI::pan_value_changed), (uint32_t) asz));
 317
 318                         bc = new BarController (*pan_adjustments[asz],
 319                                                 _io.panner()[asz]->control(),
 320                                                 bind (mem_fun(*this, &PannerUI::pan_printer), pan_adjustments[asz]));
 321
 322                         bc->set_name ("PanSlider");
 323                         bc->set_shadow_type (Gtk::SHADOW_NONE);
 324                         bc->set_style (BarController::Line);
 325
 326                         bc->StartGesture.connect (bind (mem_fun (_io, &IO::start_pan_touch), (uint32_t) asz));
 327                         bc->StopGesture.connect (bind (mem_fun (_io, &IO::end_pan_touch), (uint32_t) asz));
 328
 329                         char buf[64];
 330                         snprintf (buf, sizeof (buf), _("panner for channel %zu"), asz + 1);
 331                         ARDOUR_UI::instance()->tooltips().set_tip (bc->event_widget(), buf);
 332
 333                         bc->event_widget().signal_button_release_event().connect
 334                                 (bind (mem_fun(*this, &PannerUI::pan_button_event), (uint32_t) asz));
 335
 336                         pan_bars.push_back (bc);
 337                         switch (_width) {
 338                         case Wide:
 339                                 pan_bars.back()->set_size_request (61, 15);
 340                                 break;
 341                         case Narrow:
 342                                 pan_bars.back()->set_size_request (31, 15);
 343                                 break;
 344                         }
 345
 346                         pan_bar_packer.pack_start (*pan_bars.back(), false, false);
 347                 }
 348
 349                 /* now that we actually have the pan bars,
 350                    set their sensitivity based on current
 351                    automation state.
 352                 */
 353
 354                 update_pan_sensitive ();
 355
 356                 panning_viewport.remove ();
 357                 panning_viewport.add (pan_bar_packer);
 358                 panning_viewport.show_all ();
 359
 360         } else {
 361
 362                 int w = 0;
 363
 364                 switch (_width) {
 365                 case Wide:
 366                         w = 61;
 367                         break;
 368                 case Narrow:
 369                         w = 31;
 370                         break;
 371                 }
 372
 373                 if (panner == 0) {
 374                         panner = new Panner2d (_io.panner(), w, 61);
 375                         panner->set_name ("MixerPanZone");
 376                         panner->show ();
 377                 }
 378
 379                 update_pan_sensitive ();
 380                 panner->reset (_io.n_inputs());
 381                 panner->set_size_request (w, 61);
 382
 383                 /* and finally, add it to the panner frame */
 384
 385                 panning_viewport.remove ();
 386                 panning_viewport.add (*panner);
 387                 panning_viewport.show_all ();
 388         }
 389 }
 390
 391 bool
 392 PannerUI::pan_button_event (GdkEventButton* ev, uint32_t which)
 393 {
 394         switch (ev->button) {
 395         case 3:
 396                 if (pan_menu == 0) {
 397                         pan_menu = manage (new Menu);
 398                         pan_menu->set_name ("ArdourContextMenu");
 399                 }
 400                 build_pan_menu (which);
 401                 pan_menu->popup (1, ev->time);
 402                 return true;
 403                 break;
 404         default:
 405                 return false;
 406         }
 407
 408         return false; // what's wrong with gcc?
 409 }
 410
 411 void
 412 PannerUI::build_pan_menu (uint32_t which)
 413 {
 414         using namespace Menu_Helpers;
 415         MenuList& items (pan_menu->items());
 416
 417         items.clear ();
 418
 419         items.push_back (CheckMenuElem (_("Mute")));
 420
 421         /* set state first, connect second */
 422
 423         (dynamic_cast<CheckMenuItem*> (&items.back()))->set_active (_io.panner()[which]->muted());
 424         (dynamic_cast<CheckMenuItem*> (&items.back()))->signal_toggled().connect
 425                 (bind (mem_fun(*this, &PannerUI::pan_mute), which));
 426
 427         items.push_back (CheckMenuElem (_("Bypass"), mem_fun(*this, &PannerUI::pan_bypass_toggle)));
 428         bypass_menu_item = static_cast<CheckMenuItem*> (&items.back());
 429
 430         /* set state first, connect second */
 431
 432         bypass_menu_item->set_active (_io.panner().bypassed());
 433         bypass_menu_item->signal_toggled().connect (mem_fun(*this, &PannerUI::pan_bypass_toggle));
 434
 435         items.push_back (MenuElem (_("Reset"), mem_fun(*this, &PannerUI::pan_reset)));
 436         items.push_back (SeparatorElem());
 437         items.push_back (MenuElem (_("Reset all")));
 438 }
 439
 440 void
 441 PannerUI::pan_mute (uint32_t which)
 442 {
 443         StreamPanner* sp = _io.panner()[which];
 444         sp->set_muted (!sp->muted());
 445 }
 446
 447 void
 448 PannerUI::pan_bypass_toggle ()
 449 {
 450         if (bypass_menu_item && (_io.panner().bypassed() != bypass_menu_item->get_active())) {
 451                 _io.panner().set_bypassed (!_io.panner().bypassed());
 452         }
 453 }
 454
 455 void
 456 PannerUI::pan_reset ()
 457 {
 458 }
 459
 460 void
 461 PannerUI::effective_pan_display ()
 462 {
 463         if (_io.panner().empty()) {
 464                 return;
 465         }
 466
 467         switch (_io.n_outputs()) {
 468         case 0:
 469         case 1:
 470                 /* relax */
 471                 break;
 472
 473         case 2:
 474                 update_pan_bars (true);
 475                 break;
 476
 477         default:
 478                 //panner->move_puck (pan_value (v, right), 0.5);
 479                 break;
 480         }
 481 }
 482
 483 void
 484 PannerUI::pan_changed (void *src)
 485 {
 486         if (src == this) {
 487                 return;
 488         }
 489
 490         switch (_io.panner().size()) {
 491         case 0:
 492                 panning_link_direction_button.set_sensitive (false);
 493                 panning_link_button.set_sensitive (false);
 494                 return;
 495         case 1:
 496                 panning_link_direction_button.set_sensitive (false);
 497                 panning_link_button.set_sensitive (false);
 498                 break;
 499         default:
 500                 panning_link_direction_button.set_sensitive (true);
 501                 panning_link_button.set_sensitive (true);
 502         }
 503
 504         uint32_t nouts = _io.n_outputs();
 505
 506         switch (nouts) {
 507         case 0:
 508         case 1:
 509                 /* relax */
 510                 break;
 511
 512         case 2:
 513                 update_pan_bars (false);
 514                 break;
 515
 516         default:
 517                 // panner->move_puck (pan_value (pans[0], pans[1]), 0.5);
 518                 break;
 519         }
 520 }
 521
 522 void
 523 PannerUI::pan_adjustment_changed (uint32_t which)
 524 {
 525         if (!in_pan_update && which < _io.panner().size()) {
 526
 527                 float xpos;
 528                 float val = pan_adjustments[which]->get_value ();
 529                 _io.panner()[which]->get_position (xpos);
 530
 531                 /* add a kinda-sorta detent for the middle */
 532
 533                 if (val != 0.5 && Panner::equivalent (val, 0.5)) {
 534                         /* this is going to be reentrant, so just
 535                            return after it.
 536                         */
 537
 538                         in_pan_update = true;
 539                         pan_adjustments[which]->set_value (0.5);
 540                         in_pan_update = false;
 541                         return;
 542                 }
 543
 544                 if (!Panner::equivalent (val, xpos)) {
 545
 546                         _io.panner()[which]->set_position (val);
 547                         /* XXX
 548                            the panner objects have no access to the session,
 549                            so do this here. ick.
 550                         */
 551                         _session.set_dirty();
 552                 }
 553         }
 554 }
 555
 556 void
 557 PannerUI::pan_value_changed (uint32_t which)
 558 {
 559         ENSURE_GUI_THREAD (bind (mem_fun(*this, &PannerUI::pan_value_changed), which));
 560
 561         if (_io.n_outputs() > 1 && which < _io.panner().size()) {
 562                 float xpos;
 563                 float val = pan_adjustments[which]->get_value ();
 564
 565                 _io.panner()[which]->get_position (xpos);
 566
 567                 if (!Panner::equivalent (val, xpos)) {
 568                         in_pan_update = true;
 569                         pan_adjustments[which]->set_value (xpos);
 570                         in_pan_update = false;
 571                 }
 572         }
 573 }
 574
 575 void
 576 PannerUI::update_pan_bars (bool only_if_aplay)
 577 {
 578         uint32_t n;
 579         vector<Adjustment*>::iterator i;
 580
 581         in_pan_update = true;
 582
 583         /* this runs during automation playback, and moves the bar controllers
 584            and/or pucks around.
 585         */
 586
 587         for (i = pan_adjustments.begin(), n = 0; i != pan_adjustments.end(); ++i, ++n) {
 588                 float xpos, val;
 589
 590                 if (only_if_aplay) {
 591                         AutomationList& alist (_io.panner()[n]->automation());
 592
 593                         if (!alist.automation_playback()) {
 594                                 continue;
 595                         }
 596                 }
 597
 598                 _io.panner()[n]->get_effective_position (xpos);
 599                 val = (*i)->get_value ();
 600
 601                 if (!Panner::equivalent (val, xpos)) {
 602                         (*i)->set_value (xpos);
 603                 }
 604         }
 605
 606         in_pan_update = false;
 607 }
 608
 609 void
 610 PannerUI::pan_printer (char *buf, uint32_t len, Adjustment* adj)
 611 {
 612         float val = adj->get_value();
 613
 614         if (val == 0.0f) {
 615                 snprintf (buf, len, X_("L"));
 616         } else if (val == 1.0f) {
 617                 snprintf (buf, len, X_("R"));
 618         } else if (Panner::equivalent (val, 0.5f)) {
 619                 snprintf (buf, len, X_("C"));
 620         } else {
 621                 /* don't print anything */
 622                 buf[0] = '\0';
 623         }
 624 }
 625
 626 void
 627 PannerUI::update_pan_sensitive ()
 628 {
 629         bool sensitive = !(_io.panner().automation_state() & Play);
 630
 631         switch (_io.n_outputs()) {
 632         case 0:
 633         case 1:
 634                 break;
 635         case 2:
 636                 for (vector<BarController*>::iterator i = pan_bars.begin(); i != pan_bars.end(); ++i) {
 637                         (*i)->set_sensitive (sensitive);
 638                 }
 639                 break;
 640         default:
 641                 if (panner) {
 642                         panner->set_sensitive (sensitive);
 643                 }
 644                 break;
 645         }
 646 }
 647
 648 gint
 649 PannerUI::pan_automation_state_button_event (GdkEventButton *ev)
 650 {
 651         using namespace Menu_Helpers;
 652
 653         if (ev->type == GDK_BUTTON_RELEASE) {
 654                 return TRUE;
 655         }
 656
 657         switch (ev->button) {
 658         case 1:
 659                 pan_astate_menu.popup (1, ev->time);
 660                 break;
 661         default:
 662                 break;
 663         }
 664
 665         return TRUE;
 666 }
 667
 668 gint
 669 PannerUI::pan_automation_style_button_event (GdkEventButton *ev)
 670 {
 671         if (ev->type == GDK_BUTTON_RELEASE) {
 672                 return TRUE;
 673         }
 674
 675         switch (ev->button) {
 676         case 1:
 677                 pan_astyle_menu.popup (1, ev->time);
 678                 break;
 679         default:
 680                 break;
 681         }
 682         return TRUE;
 683 }
 684
 685 void
 686 PannerUI::pan_automation_style_changed ()
 687 {
 688         ENSURE_GUI_THREAD(mem_fun(*this, &PannerUI::pan_automation_style_changed));
 689
 690         switch (_width) {
 691         case Wide:
 692                 pan_automation_style_button.set_label (astyle_string(_io.panner().automation_style()));
 693                 break;
 694         case Narrow:
 695                 pan_automation_style_button.set_label (short_astyle_string(_io.panner().automation_style()));
 696                 break;
 697         }
 698 }
 699
 700 void
 701 PannerUI::pan_automation_state_changed ()
 702 {
 703         ENSURE_GUI_THREAD(mem_fun(*this, &PannerUI::pan_automation_state_changed));
 704
 705         bool x;
 706
 707         switch (_width) {
 708         case Wide:
 709           pan_automation_state_button.set_label (astate_string(_io.panner().automation_state()));
 710                 break;
 711         case Narrow:
 712           pan_automation_state_button.set_label (short_astate_string(_io.panner().automation_state()));
 713                 break;
 714         }
 715
 716         /* when creating a new session, we get to create busses (and
 717            sometimes tracks) with no outputs by the time they get
 718            here.
 719         */
 720
 721         if (_io.panner().empty()) {
 722                 return;
 723         }
 724
 725         x = (_io.panner().front()->automation().automation_state() != Off);
 726
 727         if (pan_automation_state_button.get_active() != x) {
 728         ignore_toggle = true;
 729                 pan_automation_state_button.set_active (x);
 730                 ignore_toggle = false;
 731         }
 732
 733         update_pan_sensitive ();
 734
 735         /* start watching automation so that things move */
 736
 737         pan_watching.disconnect();
 738
 739         if (x) {
 740           pan_watching = ARDOUR_UI::RapidScreenUpdate.connect (mem_fun (*this, &PannerUI::effective_pan_display));
 741         }
 742 }
 743
 744 string
 745 PannerUI::astate_string (AutoState state)
 746 {
 747         return _astate_string (state, false);
 748 }
 749
 750 string
 751 PannerUI::short_astate_string (AutoState state)
 752 {
 753         return _astate_string (state, true);
 754 }
 755
 756 string
 757 PannerUI::_astate_string (AutoState state, bool shrt)
 758 {
 759         string sstr;
 760
 761         switch (state) {
 762         case Off:
 763                 sstr = (shrt ? "O" : _("O"));
 764                 break;
 765         case Play:
 766                 sstr = (shrt ? "P" : _("P"));
 767                 break;
 768         case Touch:
 769                 sstr = (shrt ? "T" : _("T"));
 770                 break;
 771         case Write:
 772                 sstr = (shrt ? "W" : _("W"));
 773                 break;
 774         }
 775
 776         return sstr;
 777 }
 778
 779 string
 780 PannerUI::astyle_string (AutoStyle style)
 781 {
 782         return _astyle_string (style, false);
 783 }
 784
 785 string
 786 PannerUI::short_astyle_string (AutoStyle style)
 787 {
 788         return _astyle_string (style, true);
 789 }
 790
 791 string
 792 PannerUI::_astyle_string (AutoStyle style, bool shrt)
 793 {
 794         if (style & Trim) {
 795                 return _("Trim");
 796         } else {
 797                 /* XXX it might different in different languages */
 798
 799                 return (shrt ? _("Abs") : _("Abs"));
 800         }
 801 }