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/barcontroller.h>
  25 #include "midi++/manager.h"
  26 #include "pbd/fastlog.h"
  27
  28 #include "ardour_ui.h"
  29 #include "panner_ui.h"
  30 #include "panner2d.h"
  31 #include "utils.h"
  32 #include "gui_thread.h"
  33 #include "stereo_panner.h"
  34 #include "mono_panner.h"
  35
  36 #include "ardour/delivery.h"
  37 #include "ardour/session.h"
  38 #include "ardour/panner.h"
  39 #include "ardour/route.h"
  40
  41 #include "i18n.h"
  42
  43 using namespace std;
  44 using namespace ARDOUR;
  45 using namespace PBD;
  46 using namespace Gtkmm2ext;
  47 using namespace Gtk;
  48
  49 const int PannerUI::pan_bar_height = 40;
  50
  51 PannerUI::PannerUI (Session* s)
  52         : _current_nouts (-1)
  53         , _current_npans (-1)
  54         , hAdjustment(0.0, 0.0, 0.0)
  55         , vAdjustment(0.0, 0.0, 0.0)
  56         , panning_viewport(hAdjustment, vAdjustment)
  57         , panning_up_arrow (Gtk::ARROW_UP, Gtk::SHADOW_OUT)
  58         , panning_down_arrow (Gtk::ARROW_DOWN, Gtk::SHADOW_OUT)
  59         , panning_link_button (_("link"))
  60         , pan_automation_style_button ("")
  61         , pan_automation_state_button ("")
  62 {
  63         set_session (s);
  64
  65         ignore_toggle = false;
  66         pan_menu = 0;
  67         pan_astate_menu = 0;
  68         pan_astyle_menu = 0;
  69         in_pan_update = false;
  70         _stereo_panner = 0;
  71         _ignore_width_change = false;
  72         _ignore_position_change = false;
  73
  74         pan_automation_style_button.set_name ("MixerAutomationModeButton");
  75         pan_automation_state_button.set_name ("MixerAutomationPlaybackButton");
  76
  77         ARDOUR_UI::instance()->set_tip (pan_automation_state_button, _("Pan automation mode"));
  78         ARDOUR_UI::instance()->set_tip (pan_automation_style_button, _("Pan automation type"));
  79
  80         //set_size_request_to_display_given_text (pan_automation_state_button, X_("O"), 2, 2);
  81         //set_size_request_to_display_given_text (pan_automation_style_button, X_("0"), 2, 2);
  82
  83         panning_viewport.set_name (X_("BaseFrame"));
  84
  85         ARDOUR_UI::instance()->set_tip (panning_link_button,
  86                                                    _("panning link control"));
  87         ARDOUR_UI::instance()->set_tip (panning_link_direction_button,
  88                                                    _("panning link direction"));
  89
  90         pan_automation_style_button.unset_flags (Gtk::CAN_FOCUS);
  91         pan_automation_state_button.unset_flags (Gtk::CAN_FOCUS);
  92
  93         pan_automation_style_button.signal_button_press_event().connect (sigc::mem_fun(*this, &PannerUI::pan_automation_style_button_event), false);
  94         pan_automation_state_button.signal_button_press_event().connect (sigc::mem_fun(*this, &PannerUI::pan_automation_state_button_event), false);
  95
  96         panning_link_button.set_name (X_("PanningLinkButton"));
  97         panning_link_direction_button.set_name (X_("PanningLinkDirectionButton"));
  98
  99         panning_link_box.pack_start (panning_link_button, true, true);
 100         panning_link_box.pack_start (panning_link_direction_button, true, true);
 101         panning_link_box.pack_start (pan_automation_state_button, true, true);
 102
 103         /* the pixmap will be reset at some point, but the key thing is that
 104            we need a pixmap in the button just to get started.
 105         */
 106         panning_link_direction_button.add (*(manage (new Image (get_xpm("forwardblarrow.xpm")))));
 107
 108         panning_link_direction_button.signal_clicked().connect
 109                 (sigc::mem_fun(*this, &PannerUI::panning_link_direction_clicked));
 110
 111         panning_link_button.signal_button_press_event().connect
 112                 (sigc::mem_fun(*this, &PannerUI::panning_link_button_press), false);
 113         panning_link_button.signal_button_release_event().connect
 114                 (sigc::mem_fun(*this, &PannerUI::panning_link_button_release), false);
 115
 116         panning_up.set_border_width (3);
 117         panning_down.set_border_width (3);
 118         panning_up.add (panning_up_arrow);
 119         panning_down.add (panning_down_arrow);
 120         panning_up.set_name (X_("PanScrollerBase"));
 121         panning_down.set_name (X_("PanScrollerBase"));
 122         panning_up_arrow.set_name (X_("PanScrollerArrow"));
 123         panning_down_arrow.set_name (X_("PanScrollerArrow"));
 124
 125         pan_vbox.set_spacing (2);
 126         pan_vbox.pack_start (panning_viewport, Gtk::PACK_SHRINK);
 127         pan_vbox.pack_start (panning_link_box, Gtk::PACK_SHRINK);
 128
 129         pack_start (pan_vbox, true, true);
 130
 131         twod_panner = 0;
 132         big_window = 0;
 133
 134         set_width(Narrow);
 135 }
 136
 137 void
 138 PannerUI::set_panner (boost::shared_ptr<Panner> p)
 139 {
 140         connections.drop_connections ();
 141
 142         delete pan_astyle_menu;
 143         pan_astyle_menu = 0;
 144
 145         delete pan_astate_menu;
 146         pan_astate_menu = 0;
 147
 148         _panner = p;
 149
 150         delete twod_panner;
 151         twod_panner = 0;
 152
 153         delete _stereo_panner;
 154         _stereo_panner = 0;
 155
 156         if (!_panner) {
 157                 return;
 158         }
 159
 160         _panner->Changed.connect (connections, invalidator (*this), boost::bind (&PannerUI::panner_changed, this, this), gui_context());
 161         _panner->LinkStateChanged.connect (connections, invalidator (*this), boost::bind (&PannerUI::update_pan_linkage, this), gui_context());
 162         _panner->StateChanged.connect (connections, invalidator (*this), boost::bind (&PannerUI::update_pan_state, this), gui_context());
 163
 164         /* new panner object, force complete reset of panner GUI
 165          */
 166
 167         _current_nouts = 0;
 168         _current_npans = 0;
 169
 170         panner_changed (0);
 171         update_pan_sensitive ();
 172         update_pan_linkage ();
 173         pan_automation_state_changed ();
 174
 175 }
 176
 177 void
 178 PannerUI::build_astate_menu ()
 179 {
 180         using namespace Menu_Helpers;
 181
 182         if (pan_astate_menu == 0) {
 183                 pan_astate_menu = new Menu;
 184                 pan_astate_menu->set_name ("ArdourContextMenu");
 185         } else {
 186                 pan_astate_menu->items().clear ();
 187         }
 188
 189         pan_astate_menu->items().push_back (MenuElem (_("Manual"), sigc::bind (
 190                         sigc::mem_fun (_panner.get(), &Panner::set_automation_state),
 191                         (AutoState) Off)));
 192         pan_astate_menu->items().push_back (MenuElem (_("Play"), sigc::bind (
 193                         sigc::mem_fun (_panner.get(), &Panner::set_automation_state),
 194                         (AutoState) Play)));
 195         pan_astate_menu->items().push_back (MenuElem (_("Write"), sigc::bind (
 196                         sigc::mem_fun (_panner.get(), &Panner::set_automation_state),
 197                         (AutoState) Write)));
 198         pan_astate_menu->items().push_back (MenuElem (_("Touch"), sigc::bind (
 199                         sigc::mem_fun (_panner.get(), &Panner::set_automation_state),
 200                         (AutoState) Touch)));
 201
 202 }
 203
 204 void
 205 PannerUI::build_astyle_menu ()
 206 {
 207         using namespace Menu_Helpers;
 208
 209         if (pan_astyle_menu == 0) {
 210                 pan_astyle_menu = new Menu;
 211                 pan_astyle_menu->set_name ("ArdourContextMenu");
 212         } else {
 213                 pan_astyle_menu->items().clear();
 214         }
 215
 216         pan_astyle_menu->items().push_back (MenuElem (_("Trim")));
 217         pan_astyle_menu->items().push_back (MenuElem (_("Abs")));
 218 }
 219
 220 boost::shared_ptr<PBD::Controllable>
 221 PannerUI::get_controllable()
 222 {
 223         assert (!pan_bars.empty());
 224         return pan_bars[0]->get_controllable();
 225 }
 226
 227 bool
 228 PannerUI::panning_link_button_press (GdkEventButton*)
 229 {
 230         return true;
 231 }
 232
 233 bool
 234 PannerUI::panning_link_button_release (GdkEventButton*)
 235 {
 236         if (!ignore_toggle) {
 237                 _panner->set_linked (!_panner->linked());
 238         }
 239         return true;
 240 }
 241
 242 void
 243 PannerUI::panning_link_direction_clicked()
 244 {
 245         switch (_panner->link_direction()) {
 246         case Panner::SameDirection:
 247                 _panner->set_link_direction (Panner::OppositeDirection);
 248                 break;
 249         default:
 250                 _panner->set_link_direction (Panner::SameDirection);
 251                 break;
 252         }
 253 }
 254
 255 void
 256 PannerUI::update_pan_linkage ()
 257 {
 258         ENSURE_GUI_THREAD (*this, &PannerUI::update_pan_linkage)
 259
 260         bool const x = _panner->linked();
 261         bool const bx = panning_link_button.get_active();
 262
 263         if (x != bx) {
 264
 265                 ignore_toggle = true;
 266                 panning_link_button.set_active (x);
 267                 ignore_toggle = false;
 268         }
 269
 270         panning_link_direction_button.set_sensitive (x);
 271
 272         switch (_panner->link_direction()) {
 273         case Panner::SameDirection:
 274                 panning_link_direction_button.set_image (*(manage (new Image (get_xpm ("forwardblarrow.xpm")))));
 275                 break;
 276         default:
 277                 panning_link_direction_button.set_image (*(manage (new Image (get_xpm("revdblarrow.xpm")))));
 278                 break;
 279         }
 280 }
 281
 282 void
 283 PannerUI::on_size_allocate (Allocation& a)
 284 {
 285         HBox::on_size_allocate (a);
 286 }
 287
 288 void
 289 PannerUI::set_width (Width w)
 290 {
 291         switch (w) {
 292         case Wide:
 293                 panning_link_button.set_label (_("link"));
 294                 break;
 295         case Narrow:
 296                 panning_link_button.set_label (_("L"));
 297                 break;
 298         }
 299
 300         _width = w;
 301 }
 302
 303
 304 PannerUI::~PannerUI ()
 305 {
 306         for (vector<MonoPanner*>::iterator i = pan_bars.begin(); i != pan_bars.end(); ++i) {
 307                 delete (*i);
 308         }
 309
 310         delete twod_panner;
 311         delete big_window;
 312         delete pan_menu;
 313         delete pan_astyle_menu;
 314         delete pan_astate_menu;
 315         delete _stereo_panner;
 316 }
 317
 318
 319 void
 320 PannerUI::panner_changed (void* src)
 321 {
 322         ENSURE_GUI_THREAD (*this, &PannerUI::panner_changed)
 323
 324         setup_pan ();
 325
 326         if (src == this) {
 327                 return;
 328         }
 329
 330         switch (_panner->npanners()) {
 331         case 0:
 332                 panning_link_direction_button.set_sensitive (false);
 333                 panning_link_button.set_sensitive (false);
 334                 return;
 335         case 1:
 336                 panning_link_direction_button.set_sensitive (false);
 337                 panning_link_button.set_sensitive (false);
 338                 break;
 339         default:
 340                 panning_link_direction_button.set_sensitive (_panner->linked ());
 341                 panning_link_button.set_sensitive (true);
 342         }
 343
 344         uint32_t const nouts = _panner->nouts();
 345
 346         switch (nouts) {
 347         case 0:
 348         case 1:
 349                 /* relax */
 350                 break;
 351
 352         case 2:
 353                 break;
 354
 355         default:
 356                 // panner->move_puck (pan_value (pans[0], pans[1]), 0.5);
 357                 break;
 358         }
 359 }
 360
 361 void
 362 PannerUI::update_pan_state ()
 363 {
 364         /* currently nothing to do */
 365         // ENSURE_GUI_THREAD (*this, &PannerUI::update_panner_state)
 366 }
 367
 368 void
 369 PannerUI::setup_pan ()
 370 {
 371         if (!_panner) {
 372                 return;
 373         }
 374
 375         uint32_t const nouts = _panner->nouts();
 376         uint32_t const npans = _panner->npanners();
 377
 378         if (int32_t (nouts) == _current_nouts && int32_t (npans) == _current_npans) {
 379                 return;
 380         }
 381
 382         _current_nouts = nouts;
 383         _current_npans = npans;
 384
 385         panning_viewport.remove ();
 386
 387         delete twod_panner;
 388         twod_panner = 0;
 389         delete _stereo_panner;
 390         _stereo_panner = 0;
 391
 392         if (nouts == 0 || nouts == 1) {
 393
 394                 while (!pan_bars.empty()) {
 395                         delete pan_bars.back();
 396                         pan_bars.pop_back ();
 397                 }
 398
 399                 /* stick something into the panning viewport so that it redraws */
 400
 401                 EventBox* eb = manage (new EventBox());
 402                 panning_viewport.add (*eb);
 403
 404         } else if (nouts == 2) {
 405
 406                 vector<Adjustment*>::size_type p;
 407
 408                 while (!pan_bars.empty()) {
 409                         delete pan_bars.back();
 410                         pan_bars.pop_back ();
 411                 }
 412
 413                 if (npans == 2) {
 414
 415                         /* add integrated 2in/2out panner GUI */
 416
 417                         _stereo_panner = new StereoPanner (_panner->direction_control(),
 418                                                            _panner->width_control());
 419                         _stereo_panner->set_size_request (-1, pan_bar_height);
 420                         panning_viewport.add (*_stereo_panner);
 421
 422                         boost::shared_ptr<AutomationControl> ac;
 423
 424                         ac = _panner->direction_control();
 425                         _stereo_panner->StartPositionGesture.connect (sigc::bind (sigc::mem_fun (*this, &PannerUI::start_touch),
 426                                                               boost::weak_ptr<AutomationControl> (ac)));
 427                         _stereo_panner->StopPositionGesture.connect (sigc::bind (sigc::mem_fun (*this, &PannerUI::stop_touch),
 428                                                              boost::weak_ptr<AutomationControl>(ac)));
 429
 430                         ac = _panner->width_control();
 431                         _stereo_panner->StartWidthGesture.connect (sigc::bind (sigc::mem_fun (*this, &PannerUI::start_touch),
 432                                                               boost::weak_ptr<AutomationControl> (ac)));
 433                         _stereo_panner->StopWidthGesture.connect (sigc::bind (sigc::mem_fun (*this, &PannerUI::stop_touch),
 434                                                              boost::weak_ptr<AutomationControl>(ac)));
 435
 436                 } else {
 437
 438                         /* N-in/2out - just use a set of single-channel panners */
 439
 440                         while ((p = pan_bars.size()) < npans) {
 441
 442                                 MonoPanner* mp;
 443                                 boost::shared_ptr<AutomationControl> ac = _panner->pan_control (p);
 444
 445                                 mp = new MonoPanner (_panner->pan_control (p));
 446
 447                                 mp->StartGesture.connect (sigc::bind (sigc::mem_fun (*this, &PannerUI::start_touch),
 448                                                                       boost::weak_ptr<AutomationControl> (ac)));
 449                                 mp->StopGesture.connect (sigc::bind (sigc::mem_fun (*this, &PannerUI::stop_touch),
 450                                                                      boost::weak_ptr<AutomationControl>(ac)));
 451
 452                                 mp->signal_button_release_event().connect
 453                                         (sigc::bind (sigc::mem_fun(*this, &PannerUI::pan_button_event), (uint32_t) p));
 454
 455                                 mp->set_size_request (-1, pan_bar_height);
 456
 457                                 pan_bars.push_back (mp);
 458                                 pan_bar_packer.pack_start (*mp, false, false);
 459                         }
 460
 461                         /* now that we actually have the pan bars,
 462                            set their sensitivity based on current
 463                            automation state.
 464                         */
 465
 466                         update_pan_sensitive ();
 467                         panning_viewport.add (pan_bar_packer);
 468                 }
 469
 470
 471         } else {
 472
 473                 if (!twod_panner) {
 474                         twod_panner = new Panner2d (_panner, 61);
 475                         twod_panner->set_name ("MixerPanZone");
 476                         twod_panner->show ();
 477
 478                         twod_panner->signal_button_press_event().connect
 479                                 (sigc::bind (sigc::mem_fun(*this, &PannerUI::pan_button_event), (uint32_t) 0), false);
 480                 }
 481
 482                 update_pan_sensitive ();
 483                 twod_panner->reset (npans);
 484                 if (big_window) {
 485                         big_window->reset (npans);
 486                 }
 487                 twod_panner->set_size_request (-1, 61);
 488
 489                 /* and finally, add it to the panner frame */
 490
 491                 panning_viewport.add (*twod_panner);
 492         }
 493
 494         panning_viewport.show_all ();
 495 }
 496
 497 void
 498 PannerUI::start_touch (boost::weak_ptr<AutomationControl> wac)
 499 {
 500         boost::shared_ptr<AutomationControl> ac = wac.lock();
 501         if (!ac) {
 502                 return;
 503         }
 504         ac->start_touch (ac->session().transport_frame());
 505 }
 506
 507 void
 508 PannerUI::stop_touch (boost::weak_ptr<AutomationControl> wac)
 509 {
 510         boost::shared_ptr<AutomationControl> ac = wac.lock();
 511         if (!ac) {
 512                 return;
 513         }
 514         ac->stop_touch (false, ac->session().transport_frame());
 515 }
 516
 517 bool
 518 PannerUI::pan_button_event (GdkEventButton* ev, uint32_t which)
 519 {
 520         switch (ev->button) {
 521         case 1:
 522                 if (twod_panner && ev->type == GDK_2BUTTON_PRESS) {
 523                         if (!big_window) {
 524                                 big_window = new Panner2dWindow (_panner, 400, _panner->npanners());
 525                         }
 526                         big_window->show ();
 527                         return true;
 528                 }
 529                 break;
 530
 531         case 3:
 532                 if (pan_menu == 0) {
 533                         pan_menu = manage (new Menu);
 534                         pan_menu->set_name ("ArdourContextMenu");
 535                 }
 536                 build_pan_menu (which);
 537                 pan_menu->popup (1, ev->time);
 538                 return true;
 539                 break;
 540         default:
 541                 return false;
 542         }
 543
 544         return false; // what's wrong with gcc?
 545 }
 546
 547 void
 548 PannerUI::build_pan_menu (uint32_t which)
 549 {
 550         using namespace Menu_Helpers;
 551         MenuList& items (pan_menu->items());
 552
 553         items.clear ();
 554
 555         items.push_back (CheckMenuElem (_("Mute")));
 556
 557         /* set state first, connect second */
 558
 559         (dynamic_cast<CheckMenuItem*> (&items.back()))->set_active (_panner->streampanner(which).muted());
 560         (dynamic_cast<CheckMenuItem*> (&items.back()))->signal_toggled().connect
 561                 (sigc::bind (sigc::mem_fun(*this, &PannerUI::pan_mute), which));
 562
 563         items.push_back (CheckMenuElem (_("Bypass"), sigc::mem_fun(*this, &PannerUI::pan_bypass_toggle)));
 564         bypass_menu_item = static_cast<CheckMenuItem*> (&items.back());
 565
 566         /* set state first, connect second */
 567
 568         bypass_menu_item->set_active (_panner->bypassed());
 569         bypass_menu_item->signal_toggled().connect (sigc::mem_fun(*this, &PannerUI::pan_bypass_toggle));
 570
 571         items.push_back (MenuElem (_("Reset"), sigc::bind (sigc::mem_fun (*this, &PannerUI::pan_reset), which)));
 572         items.push_back (SeparatorElem());
 573         items.push_back (MenuElem (_("Reset all"), sigc::mem_fun (*this, &PannerUI::pan_reset_all)));
 574 }
 575
 576 void
 577 PannerUI::pan_mute (uint32_t which)
 578 {
 579         StreamPanner& sp = _panner->streampanner(which);
 580         sp.set_muted (!sp.muted());
 581 }
 582
 583 void
 584 PannerUI::pan_bypass_toggle ()
 585 {
 586         if (bypass_menu_item && (_panner->bypassed() != bypass_menu_item->get_active())) {
 587                 _panner->set_bypassed (!_panner->bypassed());
 588         }
 589 }
 590
 591 void
 592 PannerUI::pan_reset (uint32_t which)
 593 {
 594         _panner->reset_streampanner (which);
 595 }
 596
 597 void
 598 PannerUI::pan_reset_all ()
 599 {
 600         _panner->reset_to_default ();
 601 }
 602
 603 void
 604 PannerUI::effective_pan_display ()
 605 {
 606         if (_stereo_panner) {
 607                 _stereo_panner->queue_draw ();
 608         } else if (twod_panner) {
 609                 twod_panner->queue_draw ();
 610         } else {
 611                 for (vector<MonoPanner*>::iterator i = pan_bars.begin(); i != pan_bars.end(); ++i) {
 612                         (*i)->queue_draw ();
 613                 }
 614         }
 615 }
 616
 617 void
 618 PannerUI::update_pan_sensitive ()
 619 {
 620         bool const sensitive = !(_panner->mono()) && !(_panner->automation_state() & Play);
 621
 622         switch (_panner->nouts()) {
 623         case 0:
 624         case 1:
 625                 break;
 626         case 2:
 627                 for (vector<MonoPanner*>::iterator i = pan_bars.begin(); i != pan_bars.end(); ++i) {
 628                         (*i)->set_sensitive (sensitive);
 629                 }
 630                 break;
 631         default:
 632                 if (twod_panner) {
 633                         twod_panner->set_sensitive (sensitive);
 634                 }
 635                 if (big_window) {
 636                         big_window->set_sensitive (sensitive);
 637                 }
 638                 break;
 639         }
 640 }
 641
 642 gint
 643 PannerUI::pan_automation_state_button_event (GdkEventButton *ev)
 644 {
 645         using namespace Menu_Helpers;
 646
 647         if (ev->type == GDK_BUTTON_RELEASE) {
 648                 return TRUE;
 649         }
 650
 651         switch (ev->button) {
 652         case 1:
 653                 if (pan_astate_menu == 0) {
 654                         build_astate_menu ();
 655                 }
 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                 if (pan_astyle_menu == 0) {
 675                         build_astyle_menu ();
 676                 }
 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 (*this, &PannerUI::pan_automation_style_changed)
 689
 690         switch (_width) {
 691         case Wide:
 692                 pan_automation_style_button.set_label (astyle_string(_panner->automation_style()));
 693                 break;
 694         case Narrow:
 695                 pan_automation_style_button.set_label (short_astyle_string(_panner->automation_style()));
 696                 break;
 697         }
 698 }
 699
 700 void
 701 PannerUI::pan_automation_state_changed ()
 702 {
 703         ENSURE_GUI_THREAD (*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(_panner->automation_state()));
 710                 break;
 711         case Narrow:
 712           pan_automation_state_button.set_label (short_astate_string(_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 (_panner->empty()) {
 722                 return;
 723         }
 724
 725         x = (_panner->streampanner(0).pan_control()->alist()->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 (sigc::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 ? "M" : _("M"));
 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 }
 802
 803 void
 804 PannerUI::set_mono (bool yn)
 805 {
 806         _panner->set_mono (yn);
 807         update_pan_sensitive ();
 808 }
 809
 810 void
 811 PannerUI::show_width ()
 812 {
 813 }
 814
 815 void
 816 PannerUI::width_adjusted ()
 817 {
 818 }
 819
 820 void
 821 PannerUI::show_position ()
 822 {
 823 }
 824
 825 void
 826 PannerUI::position_adjusted ()
 827 {
 828 }