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 Gtkmm2ext;
  45 using namespace Gtk;
  46 using namespace sigc;
  47
  48
  49 PannerUI::PannerUI (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         pan_bar_packer.set_size_request (-1, 61);
  72         panning_viewport.set_size_request (61, 61);
  73
  74         panning_viewport.set_name (X_("BaseFrame"));
  75
  76         ARDOUR_UI::instance()->tooltips().set_tip (panning_link_button,
  77                                                    _("panning link control"));
  78         ARDOUR_UI::instance()->tooltips().set_tip (panning_link_direction_button,
  79                                                    _("panning link direction"));
  80
  81         pan_automation_style_button.unset_flags (Gtk::CAN_FOCUS);
  82         pan_automation_state_button.unset_flags (Gtk::CAN_FOCUS);
  83
  84         using namespace Menu_Helpers;
  85         pan_astate_menu.items().push_back (MenuElem (_("Isolate"),
  86                                                      bind (mem_fun (_io.panner(), &Panner::set_automation_state), (AutoState) Off)));
  87         pan_astate_menu.items().push_back (MenuElem (_("Play"),
  88                                                      bind (mem_fun (_io.panner(), &Panner::set_automation_state), (AutoState) Play)));
  89         pan_astate_menu.items().push_back (MenuElem (_("Write"),
  90                                                      bind (mem_fun (_io.panner(), &Panner::set_automation_state), (AutoState) Write)));
  91         pan_astate_menu.items().push_back (MenuElem (_("Touch"),
  92                                                      bind (mem_fun (_io.panner(), &Panner::set_automation_state), (AutoState) Touch)));
  93
  94         pan_astyle_menu.items().push_back (MenuElem (_("Trim")));
  95         pan_astyle_menu.items().push_back (MenuElem (_("Abs")));
  96
  97         pan_astate_menu.set_name ("ArdourContextMenu");
  98         pan_astyle_menu.set_name ("ArdourContextMenu");
  99
 100         pan_automation_style_button.signal_button_press_event().connect (mem_fun(*this, &PannerUI::pan_automation_style_button_event), false);
 101         pan_automation_state_button.signal_button_press_event().connect (mem_fun(*this, &PannerUI::pan_automation_state_button_event), false);
 102
 103         Gtk::HBox* pan_button_hbox = manage (new Gtk::HBox());
 104
 105         panning_link_box.pack_start (panning_link_button, true, true);
 106         panning_link_box.pack_start (panning_link_direction_button, true, true);
 107         pan_button_hbox->pack_start (panning_link_box, true, true);
 108         pan_button_hbox->pack_start (pan_automation_state_button, true, true);
 109
 110         panning_link_button.set_name (X_("PanningLinkButton"));
 111         panning_link_direction_button.set_name (X_("PanningLinkDirectionButton"));
 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
 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));
 124         panning_link_button.signal_button_release_event().connect
 125                 (mem_fun(*this, &PannerUI::panning_link_button_release));
 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 (*pan_button_hbox, Gtk::PACK_SHRINK);
 139
 140         pack_start (pan_vbox, true, false);
 141
 142         panner = 0;
 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 gint
 155 PannerUI::panning_link_button_press (GdkEventButton* ev)
 156 {
 157         return stop_signal (panning_link_button, "button-press-event");
 158 }
 159
 160 gint
 161 PannerUI::panning_link_button_release (GdkEventButton* ev)
 162 {
 163         if (!ignore_toggle) {
 164                 _io.panner().set_linked (!_io.panner().linked());
 165         }
 166         return TRUE;
 167 }
 168
 169 void
 170 PannerUI::panning_link_direction_clicked()
 171 {
 172         switch (_io.panner().link_direction()) {
 173         case Panner::SameDirection:
 174                 _io.panner().set_link_direction (Panner::OppositeDirection);
 175                 break;
 176         default:
 177                 _io.panner().set_link_direction (Panner::SameDirection);
 178                 break;
 179         }
 180 }
 181
 182 void
 183 PannerUI::update_pan_linkage ()
 184 {
 185         ENSURE_GUI_THREAD(mem_fun(*this, &PannerUI::update_pan_linkage));
 186
 187         bool x = _io.panner().linked();
 188         bool bx = panning_link_button.get_active();
 189
 190         if (x != bx) {
 191
 192                 ignore_toggle = true;
 193                 panning_link_button.set_active (x);
 194                 ignore_toggle = false;
 195         }
 196
 197         panning_link_direction_button.set_sensitive (x);
 198
 199         switch (_io.panner().link_direction()) {
 200         case Panner::SameDirection:
 201                 panning_link_direction_button.set_image (*(manage (new Image (get_xpm ("forwardblarrow.xpm")))));
 202                 break;
 203         default:
 204                 panning_link_direction_button.set_image (*(manage (new Image (get_xpm("revdblarrow.xpm")))));
 205                 break;
 206         }
 207 }
 208
 209 void
 210 PannerUI::set_width (Width w)
 211 {
 212         switch (w) {
 213         case Wide:
 214                 panning_viewport.set_size_request (61, 61);
 215                 if (panner) {
 216                         panner->set_size_request (61, 61);
 217                 }
 218                 for (vector<BarController*>::iterator i = pan_bars.begin(); i != pan_bars.end(); ++i) {
 219                                 (*i)->set_size_request (61, 15);
 220                 }
 221                 panning_link_button.set_label (_("link"));
 222                 break;
 223         case Narrow:
 224                 panning_viewport.set_size_request (31, 61);
 225                 if (panner) {
 226                         panner->set_size_request (31, 61);
 227                 }
 228                 for (vector<BarController*>::iterator i = pan_bars.begin(); i != pan_bars.end(); ++i) {
 229                                 (*i)->set_size_request (31, 15);
 230                 }
 231                 panning_link_button.set_label (_("L"));
 232                 break;
 233         }
 234
 235         _width = w;
 236 }
 237
 238
 239 PannerUI::~PannerUI ()
 240 {
 241         for (vector<Adjustment*>::iterator i = pan_adjustments.begin(); i != pan_adjustments.end(); ++i) {
 242                 delete (*i);
 243         }
 244
 245         for (vector<BarController*>::iterator i = pan_bars.begin(); i != pan_bars.end(); ++i) {
 246                 delete (*i);
 247         }
 248
 249         if (panner) {
 250                 delete panner;
 251         }
 252
 253         if (pan_menu) {
 254                 delete pan_menu;
 255         }
 256
 257 }
 258
 259
 260 void
 261 PannerUI::panner_changed ()
 262 {
 263         ENSURE_GUI_THREAD (mem_fun(*this, &PannerUI::panner_changed));
 264         setup_pan ();
 265 }
 266
 267 void
 268 PannerUI::update_pan_state ()
 269 {
 270         /* currently nothing to do */
 271         // ENSURE_GUI_THREAD (mem_fun(*this, &PannerUI::update_panner_state));
 272 }
 273
 274 void
 275 PannerUI::setup_pan ()
 276 {
 277         uint32_t nouts = _io.n_outputs ();
 278
 279         if (nouts == 0 || nouts == 1) {
 280
 281                 while (!pan_adjustments.empty()) {
 282                         delete pan_bars.back();
 283                         pan_bars.pop_back ();
 284                         delete pan_adjustments.back();
 285                         pan_adjustments.pop_back ();
 286                 }
 287
 288         } else if (nouts == 2) {
 289
 290                 vector<Adjustment*>::size_type asz;
 291                 uint32_t npans = _io.panner().size();
 292
 293                 while (!pan_adjustments.empty()) {
 294                         delete pan_bars.back();
 295                         pan_bars.pop_back ();
 296                         delete pan_adjustments.back();
 297                         pan_adjustments.pop_back ();
 298                 }
 299
 300                 while ((asz = pan_adjustments.size()) < npans) {
 301
 302                         float x;
 303                         BarController* bc;
 304
 305                         /* initialize adjustment with current value of panner */
 306
 307                         _io.panner()[asz]->get_position (x);
 308
 309                         pan_adjustments.push_back (new Adjustment (x, 0, 1.0, 0.05, 0.1));
 310                         pan_adjustments.back()->signal_value_changed().connect (bind (mem_fun(*this, &PannerUI::pan_adjustment_changed), (uint32_t) asz));
 311
 312                         _io.panner()[asz]->Changed.connect (bind (mem_fun(*this, &PannerUI::pan_value_changed), (uint32_t) asz));
 313
 314                         bc = new BarController (*pan_adjustments[asz],
 315                                                 &_io.panner()[asz]->midi_control(),
 316                                                 bind (mem_fun(*this, &PannerUI::pan_printer), pan_adjustments[asz]));
 317
 318                         if (_session.midi_port()) {
 319                                 _io.panner()[asz]->reset_midi_control (_session.midi_port(), true);
 320                         }
 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 #ifdef __APPLE__
 331                         snprintf (buf, sizeof (buf), _("panner for channel %lu"), asz + 1);
 332 #else
 333                         snprintf (buf, sizeof (buf), _("panner for channel %u"), asz + 1);
 334 #endif
 335                         ARDOUR_UI::instance()->tooltips().set_tip (bc->event_widget(), buf);
 336
 337                         bc->event_widget().signal_button_release_event().connect
 338                                 (bind (mem_fun(*this, &PannerUI::pan_button_event), (uint32_t) asz));
 339
 340                         pan_bars.push_back (bc);
 341                         switch (_width) {
 342                         case Wide:
 343                                 pan_bars.back()->set_size_request (61, 15);
 344                                 break;
 345                         case Narrow:
 346                                 pan_bars.back()->set_size_request (31, 15);
 347                                 break;
 348                         }
 349
 350                         pan_bar_packer.pack_start (*pan_bars.back(), false, false);
 351                 }
 352
 353                 /* now that we actually have the pan bars,
 354                    set their sensitivity based on current
 355                    automation state.
 356                 */
 357
 358                 update_pan_sensitive ();
 359
 360                 panning_viewport.remove ();
 361                 panning_viewport.add (pan_bar_packer);
 362                 panning_viewport.show_all ();
 363
 364         } else {
 365
 366                 int w = 0;
 367
 368                 switch (_width) {
 369                 case Wide:
 370                         w = 61;
 371                         break;
 372                 case Narrow:
 373                         w = 31;
 374                         break;
 375                 }
 376
 377                 if (panner == 0) {
 378                         panner = new Panner2d (_io.panner(), w, 61);
 379                         panner->set_name ("MixerPanZone");
 380                         panner->show ();
 381                 }
 382
 383                 update_pan_sensitive ();
 384                 panner->reset (_io.n_inputs());
 385                 panner->set_size_request (w, 61);
 386
 387                 /* and finally, add it to the panner frame */
 388
 389                 panning_viewport.remove ();
 390                 panning_viewport.add (*panner);
 391                 panning_viewport.show_all ();
 392         }
 393 }
 394
 395 gint
 396 PannerUI::pan_button_event (GdkEventButton* ev, uint32_t which)
 397 {
 398         switch (ev->button) {
 399         case 3:
 400                 if (pan_menu == 0) {
 401                         pan_menu = manage (new Menu);
 402                         pan_menu->set_name ("ArdourContextMenu");
 403                 }
 404                 build_pan_menu (which);
 405                 pan_menu->popup (1, ev->time);
 406                 return TRUE;
 407                 break;
 408         default:
 409                 return FALSE;
 410         }
 411
 412         return FALSE; // what's wrong with gcc?
 413 }
 414
 415 void
 416 PannerUI::build_pan_menu (uint32_t which)
 417 {
 418         using namespace Menu_Helpers;
 419         MenuList& items (pan_menu->items());
 420
 421         items.clear ();
 422
 423         items.push_back (CheckMenuElem (_("Mute")));
 424
 425         /* set state first, connect second */
 426
 427         (dynamic_cast<CheckMenuItem*> (&items.back()))->set_active (_io.panner()[which]->muted());
 428         (dynamic_cast<CheckMenuItem*> (&items.back()))->signal_toggled().connect
 429                 (bind (mem_fun(*this, &PannerUI::pan_mute), which));
 430
 431         items.push_back (CheckMenuElem (_("Bypass"), mem_fun(*this, &PannerUI::pan_bypass_toggle)));
 432         bypass_menu_item = static_cast<CheckMenuItem*> (&items.back());
 433
 434         /* set state first, connect second */
 435
 436         bypass_menu_item->set_active (_io.panner().bypassed());
 437         bypass_menu_item->signal_toggled().connect (mem_fun(*this, &PannerUI::pan_bypass_toggle));
 438
 439         items.push_back (MenuElem (_("Reset"), mem_fun(*this, &PannerUI::pan_reset)));
 440         items.push_back (SeparatorElem());
 441         items.push_back (MenuElem (_("Reset all")));
 442 }
 443
 444 void
 445 PannerUI::pan_mute (uint32_t which)
 446 {
 447         StreamPanner* sp = _io.panner()[which];
 448         sp->set_muted (!sp->muted());
 449 }
 450
 451 void
 452 PannerUI::pan_bypass_toggle ()
 453 {
 454         if (bypass_menu_item && (_io.panner().bypassed() != bypass_menu_item->get_active())) {
 455                 _io.panner().set_bypassed (!_io.panner().bypassed());
 456         }
 457 }
 458
 459 void
 460 PannerUI::pan_reset ()
 461 {
 462 }
 463
 464 void
 465 PannerUI::effective_pan_display ()
 466 {
 467         if (_io.panner().empty()) {
 468                 return;
 469         }
 470
 471         switch (_io.n_outputs()) {
 472         case 0:
 473         case 1:
 474                 /* relax */
 475                 break;
 476
 477         case 2:
 478                 update_pan_bars (true);
 479                 break;
 480
 481         default:
 482                 //panner->move_puck (pan_value (v, right), 0.5);
 483                 break;
 484         }
 485 }
 486
 487 void
 488 PannerUI::pan_changed (void *src)
 489 {
 490         if (src == this) {
 491                 return;
 492         }
 493
 494         switch (_io.panner().size()) {
 495         case 0:
 496                 panning_link_box.set_sensitive (false);
 497                 return;
 498         case 1:
 499                 panning_link_box.set_sensitive (false);
 500                 break;
 501         default:
 502                 panning_link_box.set_sensitive (true);
 503         }
 504
 505         uint32_t nouts = _io.n_outputs();
 506
 507         switch (nouts) {
 508         case 0:
 509         case 1:
 510                 /* relax */
 511                 break;
 512
 513         case 2:
 514                 update_pan_bars (false);
 515                 break;
 516
 517         default:
 518                 // panner->move_puck (pan_value (pans[0], pans[1]), 0.5);
 519                 break;
 520         }
 521 }
 522
 523 void
 524 PannerUI::pan_adjustment_changed (uint32_t which)
 525 {
 526         if (!in_pan_update && which < _io.panner().size()) {
 527
 528                 float xpos;
 529                 float val = pan_adjustments[which]->get_value ();
 530                 _io.panner()[which]->get_position (xpos);
 531
 532                 /* add a kinda-sorta detent for the middle */
 533
 534                 if (val != 0.5 && Panner::equivalent (val, 0.5)) {
 535                         /* this is going to be reentrant, so just
 536                            return after it.
 537                         */
 538
 539                         in_pan_update = true;
 540                         pan_adjustments[which]->set_value (0.5);
 541                         in_pan_update = false;
 542                         return;
 543                 }
 544
 545                 if (!Panner::equivalent (val, xpos)) {
 546
 547                         _io.panner()[which]->set_position (val);
 548                         /* XXX
 549                            the panner objects have no access to the session,
 550                            so do this here. ick.
 551                         */
 552                         _session.set_dirty();
 553                 }
 554         }
 555 }
 556
 557 void
 558 PannerUI::pan_value_changed (uint32_t which)
 559 {
 560         ENSURE_GUI_THREAD (bind (mem_fun(*this, &PannerUI::pan_value_changed), which));
 561
 562         if (_io.n_outputs() > 1 && which < _io.panner().size()) {
 563                 float xpos;
 564                 float val = pan_adjustments[which]->get_value ();
 565
 566                 _io.panner()[which]->get_position (xpos);
 567
 568                 if (!Panner::equivalent (val, xpos)) {
 569                         in_pan_update = true;
 570                         pan_adjustments[which]->set_value (xpos);
 571                         in_pan_update = false;
 572                 }
 573         }
 574 }
 575
 576 void
 577 PannerUI::update_pan_bars (bool only_if_aplay)
 578 {
 579         uint32_t n;
 580         vector<Adjustment*>::iterator i;
 581
 582         in_pan_update = true;
 583
 584         /* this runs during automation playback, and moves the bar controllers
 585            and/or pucks around.
 586         */
 587
 588         for (i = pan_adjustments.begin(), n = 0; i != pan_adjustments.end(); ++i, ++n) {
 589                 float xpos, val;
 590
 591                 if (only_if_aplay) {
 592                         AutomationList& alist (_io.panner()[n]->automation());
 593
 594                         if (!alist.automation_playback()) {
 595                                 continue;
 596                         }
 597                 }
 598
 599                 _io.panner()[n]->get_effective_position (xpos);
 600                 val = (*i)->get_value ();
 601
 602                 if (!Panner::equivalent (val, xpos)) {
 603                         (*i)->set_value (xpos);
 604                 }
 605         }
 606
 607         in_pan_update = false;
 608 }
 609
 610 void
 611 PannerUI::pan_printer (char *buf, uint32_t len, Adjustment* adj)
 612 {
 613         float val = adj->get_value();
 614
 615         if (val == 0.0f) {
 616                 snprintf (buf, len, X_("L"));
 617         } else if (val == 1.0f) {
 618                 snprintf (buf, len, X_("R"));
 619         } else if (Panner::equivalent (val, 0.5f)) {
 620                 snprintf (buf, len, X_("C"));
 621         } else {
 622                 /* don't print anything */
 623                 buf[0] = '\0';
 624         }
 625 }
 626
 627 void
 628 PannerUI::update_pan_sensitive ()
 629 {
 630         bool sensitive = !(_io.panner().automation_state() & Play);
 631
 632         switch (_io.n_outputs()) {
 633         case 0:
 634         case 1:
 635                 break;
 636         case 2:
 637                 for (vector<BarController*>::iterator i = pan_bars.begin(); i != pan_bars.end(); ++i) {
 638                         (*i)->set_sensitive (sensitive);
 639                 }
 640                 break;
 641         default:
 642                 if (panner) {
 643                         panner->set_sensitive (sensitive);
 644                 }
 645                 break;
 646         }
 647 }
 648
 649 gint
 650 PannerUI::pan_automation_state_button_event (GdkEventButton *ev)
 651 {
 652         using namespace Menu_Helpers;
 653
 654         if (ev->type == GDK_BUTTON_RELEASE) {
 655                 return TRUE;
 656         }
 657
 658         switch (ev->button) {
 659         case 1:
 660                 pan_astate_menu.popup (1, ev->time);
 661                 break;
 662         default:
 663                 break;
 664         }
 665
 666         return TRUE;
 667 }
 668
 669 gint
 670 PannerUI::pan_automation_style_button_event (GdkEventButton *ev)
 671 {
 672         if (ev->type == GDK_BUTTON_RELEASE) {
 673                 return TRUE;
 674         }
 675
 676         switch (ev->button) {
 677         case 1:
 678                 pan_astyle_menu.popup (1, ev->time);
 679                 break;
 680         default:
 681                 break;
 682         }
 683         return TRUE;
 684 }
 685
 686 void
 687 PannerUI::pan_automation_style_changed ()
 688 {
 689         ENSURE_GUI_THREAD(mem_fun(*this, &PannerUI::pan_automation_style_changed));
 690
 691         switch (_width) {
 692         case Wide:
 693                 pan_automation_style_button.set_label (astyle_string(_io.panner().automation_style()));
 694                 break;
 695         case Narrow:
 696                 pan_automation_style_button.set_label (short_astyle_string(_io.panner().automation_style()));
 697                 break;
 698         }
 699 }
 700
 701 void
 702 PannerUI::pan_automation_state_changed ()
 703 {
 704         ENSURE_GUI_THREAD(mem_fun(*this, &PannerUI::pan_automation_state_changed));
 705
 706         bool x;
 707
 708         switch (_width) {
 709         case Wide:
 710           pan_automation_state_button.set_label (astate_string(_io.panner().automation_state()));
 711                 break;
 712         case Narrow:
 713           pan_automation_state_button.set_label (short_astate_string(_io.panner().automation_state()));
 714                 break;
 715         }
 716
 717         /* when creating a new session, we get to create busses (and
 718            sometimes tracks) with no outputs by the time they get
 719            here.
 720         */
 721
 722         if (_io.panner().empty()) {
 723                 return;
 724         }
 725
 726         x = (_io.panner().front()->automation().automation_state() != Off);
 727
 728         if (pan_automation_state_button.get_active() != x) {
 729         ignore_toggle = true;
 730                 pan_automation_state_button.set_active (x);
 731                 ignore_toggle = false;
 732         }
 733
 734         update_pan_sensitive ();
 735
 736         /* start watching automation so that things move */
 737
 738         pan_watching.disconnect();
 739
 740         if (x) {
 741           pan_watching = ARDOUR_UI::RapidScreenUpdate.connect (mem_fun (*this, &PannerUI::effective_pan_display));
 742         }
 743 }
 744
 745 string
 746 PannerUI::astate_string (AutoState state)
 747 {
 748         return _astate_string (state, false);
 749 }
 750
 751 string
 752 PannerUI::short_astate_string (AutoState state)
 753 {
 754         return _astate_string (state, true);
 755 }
 756
 757 string
 758 PannerUI::_astate_string (AutoState state, bool shrt)
 759 {
 760         string sstr;
 761
 762         switch (state) {
 763         case Off:
 764                 sstr = (shrt ? "I" : _("I"));
 765                 break;
 766         case Play:
 767                 sstr = (shrt ? "P" : _("P"));
 768                 break;
 769         case Touch:
 770                 sstr = (shrt ? "T" : _("T"));
 771                 break;
 772         case Write:
 773                 sstr = (shrt ? "W" : _("W"));
 774                 break;
 775         }
 776
 777         return sstr;
 778 }
 779
 780 string
 781 PannerUI::astyle_string (AutoStyle style)
 782 {
 783         return _astyle_string (style, false);
 784 }
 785
 786 string
 787 PannerUI::short_astyle_string (AutoStyle style)
 788 {
 789         return _astyle_string (style, true);
 790 }
 791
 792 string
 793 PannerUI::_astyle_string (AutoStyle style, bool shrt)
 794 {
 795         if (style & Trim) {
 796                 return _("Trim");
 797         } else {
 798                 /* XXX it might different in different languages */
 799
 800                 return (shrt ? _("Abs") : _("Abs"));
 801         }
 802 }