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         set_size_request_to_display_given_text (pan_automation_state_button, X_("M"), 2, 2);
  72         set_size_request_to_display_given_text (pan_automation_style_button, X_("M"), 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 (_("Manual"),
  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         Gtk::HBox* pan_button_hbox = manage (new Gtk::HBox());
 107
 108         panning_link_box.pack_start (panning_link_button, true, true);
 109         panning_link_box.pack_start (panning_link_direction_button, true, true);
 110         pan_button_hbox->pack_start (panning_link_box, true, true);
 111         pan_button_hbox->pack_start (pan_automation_state_button, true, true);
 112
 113         panning_link_button.set_name (X_("PanningLinkButton"));
 114         panning_link_direction_button.set_name (X_("PanningLinkDirectionButton"));
 115
 116         /* the pixmap will be reset at some point, but the key thing is that
 117            we need a pixmap in the button just to get started.
 118         */
 119
 120         panning_link_direction_button.add (*(manage (new Image (get_xpm("forwardblarrow.xpm")))));
 121
 122         panning_link_direction_button.signal_clicked().connect
 123                 (mem_fun(*this, &PannerUI::panning_link_direction_clicked));
 124
 125         panning_link_button.signal_button_press_event().connect
 126                 (mem_fun(*this, &PannerUI::panning_link_button_press));
 127         panning_link_button.signal_button_release_event().connect
 128                 (mem_fun(*this, &PannerUI::panning_link_button_release));
 129
 130         panning_up.set_border_width (3);
 131         panning_down.set_border_width (3);
 132         panning_up.add (panning_up_arrow);
 133         panning_down.add (panning_down_arrow);
 134         panning_up.set_name (X_("PanScrollerBase"));
 135         panning_down.set_name (X_("PanScrollerBase"));
 136         panning_up_arrow.set_name (X_("PanScrollerArrow"));
 137         panning_down_arrow.set_name (X_("PanScrollerArrow"));
 138
 139         pan_vbox.set_spacing (4);
 140         pan_vbox.pack_start (panning_viewport, Gtk::PACK_SHRINK);
 141         pan_vbox.pack_start (*pan_button_hbox, Gtk::PACK_SHRINK);
 142
 143         pack_start (pan_vbox, true, false);
 144
 145         panner = 0;
 146
 147         _io.panner().Changed.connect (mem_fun(*this, &PannerUI::panner_changed));
 148         _io.panner().LinkStateChanged.connect (mem_fun(*this, &PannerUI::update_pan_linkage));
 149         _io.panner().StateChanged.connect (mem_fun(*this, &PannerUI::update_pan_state));
 150
 151         pan_changed (0);
 152         update_pan_sensitive ();
 153         update_pan_linkage ();
 154         pan_automation_state_changed ();
 155 }
 156
 157 gint
 158 PannerUI::panning_link_button_press (GdkEventButton* ev)
 159 {
 160         return stop_signal (panning_link_button, "button-press-event");
 161 }
 162
 163 gint
 164 PannerUI::panning_link_button_release (GdkEventButton* ev)
 165 {
 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<BarController*>::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<BarController*>::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<BarController*>::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                         BarController* 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 BarController (*pan_adjustments[asz],
 318                                                 &_io.panner()[asz]->midi_control(),
 319                                                 bind (mem_fun(*this, &PannerUI::pan_printer), pan_adjustments[asz]));
 320
 321                         if (_session.midi_port()) {
 322                                 _io.panner()[asz]->reset_midi_control (_session.midi_port(), true);
 323                         }
 324
 325                         bc->set_name ("PanSlider");
 326                         bc->set_shadow_type (Gtk::SHADOW_NONE);
 327                         bc->set_style (BarController::Line);
 328
 329                         bc->StartGesture.connect (bind (mem_fun (_io, &IO::start_pan_touch), (uint32_t) asz));
 330                         bc->StopGesture.connect (bind (mem_fun (_io, &IO::end_pan_touch), (uint32_t) asz));
 331
 332                         char buf[64];
 333 #ifdef __APPLE__
 334                         snprintf (buf, sizeof (buf), _("panner for channel %lu"), asz + 1);
 335 #else
 336                         snprintf (buf, sizeof (buf), _("panner for channel %u"), asz + 1);
 337 #endif
 338                         ARDOUR_UI::instance()->tooltips().set_tip (bc->event_widget(), buf);
 339
 340                         bc->event_widget().signal_button_release_event().connect
 341                                 (bind (mem_fun(*this, &PannerUI::pan_button_event), (uint32_t) asz));
 342
 343                         pan_bars.push_back (bc);
 344                         switch (_width) {
 345                         case Wide:
 346                                 pan_bars.back()->set_size_request (61, 15);
 347                                 break;
 348                         case Narrow:
 349                                 pan_bars.back()->set_size_request (31, 15);
 350                                 break;
 351                         }
 352
 353                         pan_bar_packer.pack_start (*pan_bars.back(), false, false);
 354                 }
 355
 356                 /* now that we actually have the pan bars,
 357                    set their sensitivity based on current
 358                    automation state.
 359                 */
 360
 361                 update_pan_sensitive ();
 362
 363                 panning_viewport.remove ();
 364                 panning_viewport.add (pan_bar_packer);
 365                 panning_viewport.show_all ();
 366
 367         } else {
 368
 369                 int w = 0;
 370
 371                 switch (_width) {
 372                 case Wide:
 373                         w = 61;
 374                         break;
 375                 case Narrow:
 376                         w = 31;
 377                         break;
 378                 }
 379
 380                 if (panner == 0) {
 381                         panner = new Panner2d (_io.panner(), w, 61);
 382                         panner->set_name ("MixerPanZone");
 383                         panner->show ();
 384                 }
 385
 386                 update_pan_sensitive ();
 387                 panner->reset (_io.n_inputs());
 388                 panner->set_size_request (w, 61);
 389
 390                 /* and finally, add it to the panner frame */
 391
 392                 panning_viewport.remove ();
 393                 panning_viewport.add (*panner);
 394                 panning_viewport.show_all ();
 395         }
 396 }
 397
 398 gint
 399 PannerUI::pan_button_event (GdkEventButton* ev, uint32_t which)
 400 {
 401         switch (ev->button) {
 402         case 3:
 403                 if (pan_menu == 0) {
 404                         pan_menu = manage (new Menu);
 405                         pan_menu->set_name ("ArdourContextMenu");
 406                 }
 407                 build_pan_menu (which);
 408                 pan_menu->popup (1, ev->time);
 409                 return TRUE;
 410                 break;
 411         default:
 412                 return FALSE;
 413         }
 414
 415         return FALSE; // what's wrong with gcc?
 416 }
 417
 418 void
 419 PannerUI::build_pan_menu (uint32_t which)
 420 {
 421         using namespace Menu_Helpers;
 422         MenuList& items (pan_menu->items());
 423
 424         items.clear ();
 425
 426         items.push_back (CheckMenuElem (_("Mute")));
 427
 428         /* set state first, connect second */
 429
 430         (dynamic_cast<CheckMenuItem*> (&items.back()))->set_active (_io.panner()[which]->muted());
 431         (dynamic_cast<CheckMenuItem*> (&items.back()))->signal_toggled().connect
 432                 (bind (mem_fun(*this, &PannerUI::pan_mute), which));
 433
 434         items.push_back (CheckMenuElem (_("Bypass"), mem_fun(*this, &PannerUI::pan_bypass_toggle)));
 435         bypass_menu_item = static_cast<CheckMenuItem*> (&items.back());
 436
 437         /* set state first, connect second */
 438
 439         bypass_menu_item->set_active (_io.panner().bypassed());
 440         bypass_menu_item->signal_toggled().connect (mem_fun(*this, &PannerUI::pan_bypass_toggle));
 441
 442         items.push_back (MenuElem (_("Reset"), mem_fun(*this, &PannerUI::pan_reset)));
 443         items.push_back (SeparatorElem());
 444         items.push_back (MenuElem (_("Reset all")));
 445 }
 446
 447 void
 448 PannerUI::pan_mute (uint32_t which)
 449 {
 450         StreamPanner* sp = _io.panner()[which];
 451         sp->set_muted (!sp->muted());
 452 }
 453
 454 void
 455 PannerUI::pan_bypass_toggle ()
 456 {
 457         if (bypass_menu_item && (_io.panner().bypassed() != bypass_menu_item->get_active())) {
 458                 _io.panner().set_bypassed (!_io.panner().bypassed());
 459         }
 460 }
 461
 462 void
 463 PannerUI::pan_reset ()
 464 {
 465 }
 466
 467 void
 468 PannerUI::effective_pan_display ()
 469 {
 470         if (_io.panner().empty()) {
 471                 return;
 472         }
 473
 474         switch (_io.n_outputs()) {
 475         case 0:
 476         case 1:
 477                 /* relax */
 478                 break;
 479
 480         case 2:
 481                 update_pan_bars (true);
 482                 break;
 483
 484         default:
 485                 //panner->move_puck (pan_value (v, right), 0.5);
 486                 break;
 487         }
 488 }
 489
 490 void
 491 PannerUI::pan_changed (void *src)
 492 {
 493         if (src == this) {
 494                 return;
 495         }
 496
 497         switch (_io.panner().size()) {
 498         case 0:
 499                 panning_link_box.set_sensitive (false);
 500                 return;
 501         case 1:
 502                 panning_link_box.set_sensitive (false);
 503                 break;
 504         default:
 505                 panning_link_box.set_sensitive (true);
 506         }
 507
 508         uint32_t nouts = _io.n_outputs();
 509
 510         switch (nouts) {
 511         case 0:
 512         case 1:
 513                 /* relax */
 514                 break;
 515
 516         case 2:
 517                 update_pan_bars (false);
 518                 break;
 519
 520         default:
 521                 // panner->move_puck (pan_value (pans[0], pans[1]), 0.5);
 522                 break;
 523         }
 524 }
 525
 526 void
 527 PannerUI::pan_adjustment_changed (uint32_t which)
 528 {
 529         if (!in_pan_update && which < _io.panner().size()) {
 530
 531                 float xpos;
 532                 float val = pan_adjustments[which]->get_value ();
 533                 _io.panner()[which]->get_position (xpos);
 534
 535                 /* add a kinda-sorta detent for the middle */
 536
 537                 if (val != 0.5 && Panner::equivalent (val, 0.5)) {
 538                         /* this is going to be reentrant, so just
 539                            return after it.
 540                         */
 541
 542                         in_pan_update = true;
 543                         pan_adjustments[which]->set_value (0.5);
 544                         in_pan_update = false;
 545                         return;
 546                 }
 547
 548                 if (!Panner::equivalent (val, xpos)) {
 549
 550                         _io.panner()[which]->set_position (val);
 551                         /* XXX
 552                            the panner objects have no access to the session,
 553                            so do this here. ick.
 554                         */
 555                         _session.set_dirty();
 556                 }
 557         }
 558 }
 559
 560 void
 561 PannerUI::pan_value_changed (uint32_t which)
 562 {
 563         ENSURE_GUI_THREAD (bind (mem_fun(*this, &PannerUI::pan_value_changed), which));
 564
 565         if (_io.n_outputs() > 1 && which < _io.panner().size()) {
 566                 float xpos;
 567                 float val = pan_adjustments[which]->get_value ();
 568
 569                 _io.panner()[which]->get_position (xpos);
 570
 571                 if (!Panner::equivalent (val, xpos)) {
 572                         in_pan_update = true;
 573                         pan_adjustments[which]->set_value (xpos);
 574                         in_pan_update = false;
 575                 }
 576         }
 577 }
 578
 579 void
 580 PannerUI::update_pan_bars (bool only_if_aplay)
 581 {
 582         uint32_t n;
 583         vector<Adjustment*>::iterator i;
 584
 585         in_pan_update = true;
 586
 587         /* this runs during automation playback, and moves the bar controllers
 588            and/or pucks around.
 589         */
 590
 591         for (i = pan_adjustments.begin(), n = 0; i != pan_adjustments.end(); ++i, ++n) {
 592                 float xpos, val;
 593
 594                 if (only_if_aplay) {
 595                         AutomationList& alist (_io.panner()[n]->automation());
 596
 597                         if (!alist.automation_playback()) {
 598                                 continue;
 599                         }
 600                 }
 601
 602                 _io.panner()[n]->get_effective_position (xpos);
 603                 val = (*i)->get_value ();
 604
 605                 if (!Panner::equivalent (val, xpos)) {
 606                         (*i)->set_value (xpos);
 607                 }
 608         }
 609
 610         in_pan_update = false;
 611 }
 612
 613 void
 614 PannerUI::pan_printer (char *buf, uint32_t len, Adjustment* adj)
 615 {
 616         float val = adj->get_value();
 617
 618         if (val == 0.0f) {
 619                 snprintf (buf, len, X_("L"));
 620         } else if (val == 1.0f) {
 621                 snprintf (buf, len, X_("R"));
 622         } else if (Panner::equivalent (val, 0.5f)) {
 623                 snprintf (buf, len, X_("C"));
 624         } else {
 625                 /* don't print anything */
 626                 buf[0] = '\0';
 627         }
 628 }
 629
 630 void
 631 PannerUI::update_pan_sensitive ()
 632 {
 633         bool sensitive = !(_io.panner().automation_state() & Play);
 634
 635         switch (_io.n_outputs()) {
 636         case 0:
 637         case 1:
 638                 break;
 639         case 2:
 640                 for (vector<BarController*>::iterator i = pan_bars.begin(); i != pan_bars.end(); ++i) {
 641                         (*i)->set_sensitive (sensitive);
 642                 }
 643                 break;
 644         default:
 645                 if (panner) {
 646                         panner->set_sensitive (sensitive);
 647                 }
 648                 break;
 649         }
 650 }
 651
 652 gint
 653 PannerUI::pan_automation_state_button_event (GdkEventButton *ev)
 654 {
 655         using namespace Menu_Helpers;
 656
 657         if (ev->type == GDK_BUTTON_RELEASE) {
 658                 return TRUE;
 659         }
 660
 661         switch (ev->button) {
 662         case 1:
 663                 pan_astate_menu.popup (1, ev->time);
 664                 break;
 665         default:
 666                 break;
 667         }
 668
 669         return TRUE;
 670 }
 671
 672 gint
 673 PannerUI::pan_automation_style_button_event (GdkEventButton *ev)
 674 {
 675         if (ev->type == GDK_BUTTON_RELEASE) {
 676                 return TRUE;
 677         }
 678
 679         switch (ev->button) {
 680         case 1:
 681                 pan_astyle_menu.popup (1, ev->time);
 682                 break;
 683         default:
 684                 break;
 685         }
 686         return TRUE;
 687 }
 688
 689 void
 690 PannerUI::pan_automation_style_changed ()
 691 {
 692         ENSURE_GUI_THREAD(mem_fun(*this, &PannerUI::pan_automation_style_changed));
 693
 694         switch (_width) {
 695         case Wide:
 696                 pan_automation_style_button.set_label (astyle_string(_io.panner().automation_style()));
 697                 break;
 698         case Narrow:
 699                 pan_automation_style_button.set_label (short_astyle_string(_io.panner().automation_style()));
 700                 break;
 701         }
 702 }
 703
 704 void
 705 PannerUI::pan_automation_state_changed ()
 706 {
 707         ENSURE_GUI_THREAD(mem_fun(*this, &PannerUI::pan_automation_state_changed));
 708
 709         bool x;
 710
 711         switch (_width) {
 712         case Wide:
 713           pan_automation_state_button.set_label (astate_string(_io.panner().automation_state()));
 714                 break;
 715         case Narrow:
 716           pan_automation_state_button.set_label (short_astate_string(_io.panner().automation_state()));
 717                 break;
 718         }
 719
 720         /* when creating a new session, we get to create busses (and
 721            sometimes tracks) with no outputs by the time they get
 722            here.
 723         */
 724
 725         if (_io.panner().empty()) {
 726                 return;
 727         }
 728
 729         x = (_io.panner().front()->automation().automation_state() != Off);
 730
 731         if (pan_automation_state_button.get_active() != x) {
 732         ignore_toggle = true;
 733                 pan_automation_state_button.set_active (x);
 734                 ignore_toggle = false;
 735         }
 736
 737         update_pan_sensitive ();
 738
 739         /* start watching automation so that things move */
 740
 741         pan_watching.disconnect();
 742
 743         if (x) {
 744           pan_watching = ARDOUR_UI::RapidScreenUpdate.connect (mem_fun (*this, &PannerUI::effective_pan_display));
 745         }
 746 }
 747
 748 string
 749 PannerUI::astate_string (AutoState state)
 750 {
 751         return _astate_string (state, false);
 752 }
 753
 754 string
 755 PannerUI::short_astate_string (AutoState state)
 756 {
 757         return _astate_string (state, true);
 758 }
 759
 760 string
 761 PannerUI::_astate_string (AutoState state, bool shrt)
 762 {
 763         string sstr;
 764
 765         switch (state) {
 766         case Off:
 767                 sstr = (shrt ? "M" : _("M"));
 768                 break;
 769         case Play:
 770                 sstr = (shrt ? "P" : _("P"));
 771                 break;
 772         case Touch:
 773                 sstr = (shrt ? "T" : _("T"));
 774                 break;
 775         case Write:
 776                 sstr = (shrt ? "W" : _("W"));
 777                 break;
 778         }
 779
 780         return sstr;
 781 }
 782
 783 string
 784 PannerUI::astyle_string (AutoStyle style)
 785 {
 786         return _astyle_string (style, false);
 787 }
 788
 789 string
 790 PannerUI::short_astyle_string (AutoStyle style)
 791 {
 792         return _astyle_string (style, true);
 793 }
 794
 795 string
 796 PannerUI::_astyle_string (AutoStyle style, bool shrt)
 797 {
 798         if (style & Trim) {
 799                 return _("Trim");
 800         } else {
 801                 /* XXX it might different in different languages */
 802
 803                 return (shrt ? _("Abs") : _("Abs"));
 804         }
 805 }