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 (_("Off"),
  89                                                      bind (mem_fun (_io.panner(), &Panner::set_automation_state), (AutoState) Off)));
  90         pan_astate_menu.items().push_back (MenuElem (_("Play"),
  91                                                      bind (mem_fun (_io.panner(), &Panner::set_automation_state), (AutoState) Play)));
  92         pan_astate_menu.items().push_back (MenuElem (_("Write"),
  93                                                      bind (mem_fun (_io.panner(), &Panner::set_automation_state), (AutoState) Write)));
  94         pan_astate_menu.items().push_back (MenuElem (_("Touch"),
  95                                                      bind (mem_fun (_io.panner(), &Panner::set_automation_state), (AutoState) Touch)));
  96
  97         pan_astyle_menu.items().push_back (MenuElem (_("Trim")));
  98         pan_astyle_menu.items().push_back (MenuElem (_("Abs")));
  99
 100         pan_astate_menu.set_name ("ArdourContextMenu");
 101         pan_astyle_menu.set_name ("ArdourContextMenu");
 102
 103         pan_automation_style_button.signal_button_press_event().connect (mem_fun(*this, &PannerUI::pan_automation_style_button_event), false);
 104         pan_automation_state_button.signal_button_press_event().connect (mem_fun(*this, &PannerUI::pan_automation_state_button_event), false);
 105
 106         panning_link_button.set_name (X_("PanningLinkButton"));
 107         panning_link_direction_button.set_name (X_("PanningLinkDirectionButton"));
 108
 109         /* the pixmap will be reset at some point, but the key thing is that
 110            we need a pixmap in the button just to get started.
 111         */
 112
 113         Gtk::HBox* pan_button_hbox = manage (new Gtk::HBox());
 114
 115         panning_link_box.pack_start (panning_link_button, true, true);
 116         panning_link_box.pack_start (panning_link_direction_button, true, true);
 117         pan_button_hbox->pack_start (panning_link_box, true, true);
 118         pan_button_hbox->pack_start (pan_automation_state_button, true, true);
 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), false);
 127         panning_link_button.signal_button_release_event().connect
 128                 (mem_fun(*this, &PannerUI::panning_link_button_release), false);
 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 bool
 158 PannerUI::panning_link_button_press (GdkEventButton* ev)
 159 {
 160         cerr << "link press\n";
 161         return true;
 162 }
 163
 164 bool
 165 PannerUI::panning_link_button_release (GdkEventButton* ev)
 166 {
 167         cerr << "link release\n";
 168         if (!ignore_toggle) {
 169                 _io.panner().set_linked (!_io.panner().linked());
 170         }
 171         return true;
 172 }
 173
 174 void
 175 PannerUI::panning_link_direction_clicked()
 176 {
 177         switch (_io.panner().link_direction()) {
 178         case Panner::SameDirection:
 179                 _io.panner().set_link_direction (Panner::OppositeDirection);
 180                 break;
 181         default:
 182                 _io.panner().set_link_direction (Panner::SameDirection);
 183                 break;
 184         }
 185 }
 186
 187 void
 188 PannerUI::update_pan_linkage ()
 189 {
 190         ENSURE_GUI_THREAD(mem_fun(*this, &PannerUI::update_pan_linkage));
 191
 192         bool x = _io.panner().linked();
 193         bool bx = panning_link_button.get_active();
 194
 195         if (x != bx) {
 196
 197                 ignore_toggle = true;
 198                 panning_link_button.set_active (x);
 199                 ignore_toggle = false;
 200         }
 201
 202         panning_link_direction_button.set_sensitive (x);
 203
 204         switch (_io.panner().link_direction()) {
 205         case Panner::SameDirection:
 206                 panning_link_direction_button.set_image (*(manage (new Image (get_xpm ("forwardblarrow.xpm")))));
 207                 break;
 208         default:
 209                 panning_link_direction_button.set_image (*(manage (new Image (get_xpm("revdblarrow.xpm")))));
 210                 break;
 211         }
 212 }
 213
 214 void
 215 PannerUI::set_width (Width w)
 216 {
 217         switch (w) {
 218         case Wide:
 219                 panning_viewport.set_size_request (61, 61);
 220                 if (panner) {
 221                         panner->set_size_request (61, 61);
 222                 }
 223                 for (vector<BarController*>::iterator i = pan_bars.begin(); i != pan_bars.end(); ++i) {
 224                                 (*i)->set_size_request (61, 15);
 225                 }
 226                 panning_link_button.set_label (_("link"));
 227                 break;
 228         case Narrow:
 229                 panning_viewport.set_size_request (31, 61);
 230                 if (panner) {
 231                         panner->set_size_request (31, 61);
 232                 }
 233                 for (vector<BarController*>::iterator i = pan_bars.begin(); i != pan_bars.end(); ++i) {
 234                                 (*i)->set_size_request (31, 15);
 235                 }
 236                 panning_link_button.set_label (_("L"));
 237                 break;
 238         }
 239
 240         _width = w;
 241 }
 242
 243
 244 PannerUI::~PannerUI ()
 245 {
 246         for (vector<Adjustment*>::iterator i = pan_adjustments.begin(); i != pan_adjustments.end(); ++i) {
 247                 delete (*i);
 248         }
 249
 250         for (vector<BarController*>::iterator i = pan_bars.begin(); i != pan_bars.end(); ++i) {
 251                 delete (*i);
 252         }
 253
 254         if (panner) {
 255                 delete panner;
 256         }
 257
 258         if (pan_menu) {
 259                 delete pan_menu;
 260         }
 261
 262 }
 263
 264
 265 void
 266 PannerUI::panner_changed ()
 267 {
 268         ENSURE_GUI_THREAD (mem_fun(*this, &PannerUI::panner_changed));
 269         setup_pan ();
 270 }
 271
 272 void
 273 PannerUI::update_pan_state ()
 274 {
 275         /* currently nothing to do */
 276         // ENSURE_GUI_THREAD (mem_fun(*this, &PannerUI::update_panner_state));
 277 }
 278
 279 void
 280 PannerUI::setup_pan ()
 281 {
 282         uint32_t nouts = _io.n_outputs ();
 283
 284         if (nouts == 0 || nouts == 1) {
 285
 286                 while (!pan_adjustments.empty()) {
 287                         delete pan_bars.back();
 288                         pan_bars.pop_back ();
 289                         delete pan_adjustments.back();
 290                         pan_adjustments.pop_back ();
 291                 }
 292
 293         } else if (nouts == 2) {
 294
 295                 vector<Adjustment*>::size_type asz;
 296                 uint32_t npans = _io.panner().size();
 297
 298                 while (!pan_adjustments.empty()) {
 299                         delete pan_bars.back();
 300                         pan_bars.pop_back ();
 301                         delete pan_adjustments.back();
 302                         pan_adjustments.pop_back ();
 303                 }
 304
 305                 while ((asz = pan_adjustments.size()) < npans) {
 306
 307                         float x;
 308                         BarController* bc;
 309
 310                         /* initialize adjustment with current value of panner */
 311
 312                         _io.panner()[asz]->get_position (x);
 313
 314                         pan_adjustments.push_back (new Adjustment (x, 0, 1.0, 0.05, 0.1));
 315                         pan_adjustments.back()->signal_value_changed().connect (bind (mem_fun(*this, &PannerUI::pan_adjustment_changed), (uint32_t) asz));
 316
 317                         _io.panner()[asz]->Changed.connect (bind (mem_fun(*this, &PannerUI::pan_value_changed), (uint32_t) asz));
 318
 319                         bc = new BarController (*pan_adjustments[asz],
 320                                                 &_io.panner()[asz]->midi_control(),
 321                                                 bind (mem_fun(*this, &PannerUI::pan_printer), pan_adjustments[asz]));
 322
 323                         if (_session.midi_port()) {
 324                                 _io.panner()[asz]->reset_midi_control (_session.midi_port(), true);
 325                         }
 326
 327                         bc->set_name ("PanSlider");
 328                         bc->set_shadow_type (Gtk::SHADOW_NONE);
 329                         bc->set_style (BarController::Line);
 330
 331                         bc->StartGesture.connect (bind (mem_fun (_io, &IO::start_pan_touch), (uint32_t) asz));
 332                         bc->StopGesture.connect (bind (mem_fun (_io, &IO::end_pan_touch), (uint32_t) asz));
 333
 334                         char buf[64];
 335 #ifdef __APPLE__
 336                         snprintf (buf, sizeof (buf), _("panner for channel %lu"), asz + 1);
 337 #else
 338                         snprintf (buf, sizeof (buf), _("panner for channel %u"), asz + 1);
 339 #endif
 340                         ARDOUR_UI::instance()->tooltips().set_tip (bc->event_widget(), buf);
 341
 342                         bc->event_widget().signal_button_release_event().connect
 343                                 (bind (mem_fun(*this, &PannerUI::pan_button_event), (uint32_t) asz));
 344
 345                         pan_bars.push_back (bc);
 346                         switch (_width) {
 347                         case Wide:
 348                                 pan_bars.back()->set_size_request (61, 15);
 349                                 break;
 350                         case Narrow:
 351                                 pan_bars.back()->set_size_request (31, 15);
 352                                 break;
 353                         }
 354
 355                         pan_bar_packer.pack_start (*pan_bars.back(), false, false);
 356                 }
 357
 358                 /* now that we actually have the pan bars,
 359                    set their sensitivity based on current
 360                    automation state.
 361                 */
 362
 363                 update_pan_sensitive ();
 364
 365                 panning_viewport.remove ();
 366                 panning_viewport.add (pan_bar_packer);
 367                 panning_viewport.show_all ();
 368
 369         } else {
 370
 371                 int w = 0;
 372
 373                 switch (_width) {
 374                 case Wide:
 375                         w = 61;
 376                         break;
 377                 case Narrow:
 378                         w = 31;
 379                         break;
 380                 }
 381
 382                 if (panner == 0) {
 383                         panner = new Panner2d (_io.panner(), w, 61);
 384                         panner->set_name ("MixerPanZone");
 385                         panner->show ();
 386                 }
 387
 388                 update_pan_sensitive ();
 389                 panner->reset (_io.n_inputs());
 390                 panner->set_size_request (w, 61);
 391
 392                 /* and finally, add it to the panner frame */
 393
 394                 panning_viewport.remove ();
 395                 panning_viewport.add (*panner);
 396                 panning_viewport.show_all ();
 397         }
 398 }
 399
 400 bool
 401 PannerUI::pan_button_event (GdkEventButton* ev, uint32_t which)
 402 {
 403         switch (ev->button) {
 404         case 3:
 405                 if (pan_menu == 0) {
 406                         pan_menu = manage (new Menu);
 407                         pan_menu->set_name ("ArdourContextMenu");
 408                 }
 409                 build_pan_menu (which);
 410                 pan_menu->popup (1, ev->time);
 411                 return true;
 412                 break;
 413         default:
 414                 return false;
 415         }
 416
 417         return false; // what's wrong with gcc?
 418 }
 419
 420 void
 421 PannerUI::build_pan_menu (uint32_t which)
 422 {
 423         using namespace Menu_Helpers;
 424         MenuList& items (pan_menu->items());
 425
 426         items.clear ();
 427
 428         items.push_back (CheckMenuElem (_("Mute")));
 429
 430         /* set state first, connect second */
 431
 432         (dynamic_cast<CheckMenuItem*> (&items.back()))->set_active (_io.panner()[which]->muted());
 433         (dynamic_cast<CheckMenuItem*> (&items.back()))->signal_toggled().connect
 434                 (bind (mem_fun(*this, &PannerUI::pan_mute), which));
 435
 436         items.push_back (CheckMenuElem (_("Bypass"), mem_fun(*this, &PannerUI::pan_bypass_toggle)));
 437         bypass_menu_item = static_cast<CheckMenuItem*> (&items.back());
 438
 439         /* set state first, connect second */
 440
 441         bypass_menu_item->set_active (_io.panner().bypassed());
 442         bypass_menu_item->signal_toggled().connect (mem_fun(*this, &PannerUI::pan_bypass_toggle));
 443
 444         items.push_back (MenuElem (_("Reset"), mem_fun(*this, &PannerUI::pan_reset)));
 445         items.push_back (SeparatorElem());
 446         items.push_back (MenuElem (_("Reset all")));
 447 }
 448
 449 void
 450 PannerUI::pan_mute (uint32_t which)
 451 {
 452         StreamPanner* sp = _io.panner()[which];
 453         sp->set_muted (!sp->muted());
 454 }
 455
 456 void
 457 PannerUI::pan_bypass_toggle ()
 458 {
 459         if (bypass_menu_item && (_io.panner().bypassed() != bypass_menu_item->get_active())) {
 460                 _io.panner().set_bypassed (!_io.panner().bypassed());
 461         }
 462 }
 463
 464 void
 465 PannerUI::pan_reset ()
 466 {
 467 }
 468
 469 void
 470 PannerUI::effective_pan_display ()
 471 {
 472         if (_io.panner().empty()) {
 473                 return;
 474         }
 475
 476         switch (_io.n_outputs()) {
 477         case 0:
 478         case 1:
 479                 /* relax */
 480                 break;
 481
 482         case 2:
 483                 update_pan_bars (true);
 484                 break;
 485
 486         default:
 487                 //panner->move_puck (pan_value (v, right), 0.5);
 488                 break;
 489         }
 490 }
 491
 492 void
 493 PannerUI::pan_changed (void *src)
 494 {
 495         if (src == this) {
 496                 return;
 497         }
 498
 499         switch (_io.panner().size()) {
 500         case 0:
 501                 panning_link_box.set_sensitive (false);
 502                 return;
 503         case 1:
 504                 panning_link_box.set_sensitive (false);
 505                 break;
 506         default:
 507                 panning_link_box.set_sensitive (true);
 508         }
 509
 510         uint32_t nouts = _io.n_outputs();
 511
 512         switch (nouts) {
 513         case 0:
 514         case 1:
 515                 /* relax */
 516                 break;
 517
 518         case 2:
 519                 update_pan_bars (false);
 520                 break;
 521
 522         default:
 523                 // panner->move_puck (pan_value (pans[0], pans[1]), 0.5);
 524                 break;
 525         }
 526 }
 527
 528 void
 529 PannerUI::pan_adjustment_changed (uint32_t which)
 530 {
 531         if (!in_pan_update && which < _io.panner().size()) {
 532
 533                 float xpos;
 534                 float val = pan_adjustments[which]->get_value ();
 535                 _io.panner()[which]->get_position (xpos);
 536
 537                 /* add a kinda-sorta detent for the middle */
 538
 539                 if (val != 0.5 && Panner::equivalent (val, 0.5)) {
 540                         /* this is going to be reentrant, so just
 541                            return after it.
 542                         */
 543
 544                         in_pan_update = true;
 545                         pan_adjustments[which]->set_value (0.5);
 546                         in_pan_update = false;
 547                         return;
 548                 }
 549
 550                 if (!Panner::equivalent (val, xpos)) {
 551
 552                         _io.panner()[which]->set_position (val);
 553                         /* XXX
 554                            the panner objects have no access to the session,
 555                            so do this here. ick.
 556                         */
 557                         _session.set_dirty();
 558                 }
 559         }
 560 }
 561
 562 void
 563 PannerUI::pan_value_changed (uint32_t which)
 564 {
 565         ENSURE_GUI_THREAD (bind (mem_fun(*this, &PannerUI::pan_value_changed), which));
 566
 567         if (_io.n_outputs() > 1 && which < _io.panner().size()) {
 568                 float xpos;
 569                 float val = pan_adjustments[which]->get_value ();
 570
 571                 _io.panner()[which]->get_position (xpos);
 572
 573                 if (!Panner::equivalent (val, xpos)) {
 574                         in_pan_update = true;
 575                         pan_adjustments[which]->set_value (xpos);
 576                         in_pan_update = false;
 577                 }
 578         }
 579 }
 580
 581 void
 582 PannerUI::update_pan_bars (bool only_if_aplay)
 583 {
 584         uint32_t n;
 585         vector<Adjustment*>::iterator i;
 586
 587         in_pan_update = true;
 588
 589         /* this runs during automation playback, and moves the bar controllers
 590            and/or pucks around.
 591         */
 592
 593         for (i = pan_adjustments.begin(), n = 0; i != pan_adjustments.end(); ++i, ++n) {
 594                 float xpos, val;
 595
 596                 if (only_if_aplay) {
 597                         AutomationList& alist (_io.panner()[n]->automation());
 598
 599                         if (!alist.automation_playback()) {
 600                                 continue;
 601                         }
 602                 }
 603
 604                 _io.panner()[n]->get_effective_position (xpos);
 605                 val = (*i)->get_value ();
 606
 607                 if (!Panner::equivalent (val, xpos)) {
 608                         (*i)->set_value (xpos);
 609                 }
 610         }
 611
 612         in_pan_update = false;
 613 }
 614
 615 void
 616 PannerUI::pan_printer (char *buf, uint32_t len, Adjustment* adj)
 617 {
 618         float val = adj->get_value();
 619
 620         if (val == 0.0f) {
 621                 snprintf (buf, len, X_("L"));
 622         } else if (val == 1.0f) {
 623                 snprintf (buf, len, X_("R"));
 624         } else if (Panner::equivalent (val, 0.5f)) {
 625                 snprintf (buf, len, X_("C"));
 626         } else {
 627                 /* don't print anything */
 628                 buf[0] = '\0';
 629         }
 630 }
 631
 632 void
 633 PannerUI::update_pan_sensitive ()
 634 {
 635         bool sensitive = !(_io.panner().automation_state() & Play);
 636
 637         switch (_io.n_outputs()) {
 638         case 0:
 639         case 1:
 640                 break;
 641         case 2:
 642                 for (vector<BarController*>::iterator i = pan_bars.begin(); i != pan_bars.end(); ++i) {
 643                         (*i)->set_sensitive (sensitive);
 644                 }
 645                 break;
 646         default:
 647                 if (panner) {
 648                         panner->set_sensitive (sensitive);
 649                 }
 650                 break;
 651         }
 652 }
 653
 654 gint
 655 PannerUI::pan_automation_state_button_event (GdkEventButton *ev)
 656 {
 657         using namespace Menu_Helpers;
 658
 659         if (ev->type == GDK_BUTTON_RELEASE) {
 660                 return TRUE;
 661         }
 662
 663         switch (ev->button) {
 664         case 1:
 665                 pan_astate_menu.popup (1, ev->time);
 666                 break;
 667         default:
 668                 break;
 669         }
 670
 671         return TRUE;
 672 }
 673
 674 gint
 675 PannerUI::pan_automation_style_button_event (GdkEventButton *ev)
 676 {
 677         if (ev->type == GDK_BUTTON_RELEASE) {
 678                 return TRUE;
 679         }
 680
 681         switch (ev->button) {
 682         case 1:
 683                 pan_astyle_menu.popup (1, ev->time);
 684                 break;
 685         default:
 686                 break;
 687         }
 688         return TRUE;
 689 }
 690
 691 void
 692 PannerUI::pan_automation_style_changed ()
 693 {
 694         ENSURE_GUI_THREAD(mem_fun(*this, &PannerUI::pan_automation_style_changed));
 695
 696         switch (_width) {
 697         case Wide:
 698                 pan_automation_style_button.set_label (astyle_string(_io.panner().automation_style()));
 699                 break;
 700         case Narrow:
 701                 pan_automation_style_button.set_label (short_astyle_string(_io.panner().automation_style()));
 702                 break;
 703         }
 704 }
 705
 706 void
 707 PannerUI::pan_automation_state_changed ()
 708 {
 709         ENSURE_GUI_THREAD(mem_fun(*this, &PannerUI::pan_automation_state_changed));
 710
 711         bool x;
 712
 713         switch (_width) {
 714         case Wide:
 715           pan_automation_state_button.set_label (astate_string(_io.panner().automation_state()));
 716                 break;
 717         case Narrow:
 718           pan_automation_state_button.set_label (short_astate_string(_io.panner().automation_state()));
 719                 break;
 720         }
 721
 722         /* when creating a new session, we get to create busses (and
 723            sometimes tracks) with no outputs by the time they get
 724            here.
 725         */
 726
 727         if (_io.panner().empty()) {
 728                 return;
 729         }
 730
 731         x = (_io.panner().front()->automation().automation_state() != Off);
 732
 733         if (pan_automation_state_button.get_active() != x) {
 734         ignore_toggle = true;
 735                 pan_automation_state_button.set_active (x);
 736                 ignore_toggle = false;
 737         }
 738
 739         update_pan_sensitive ();
 740
 741         /* start watching automation so that things move */
 742
 743         pan_watching.disconnect();
 744
 745         if (x) {
 746           pan_watching = ARDOUR_UI::RapidScreenUpdate.connect (mem_fun (*this, &PannerUI::effective_pan_display));
 747         }
 748 }
 749
 750 string
 751 PannerUI::astate_string (AutoState state)
 752 {
 753         return _astate_string (state, false);
 754 }
 755
 756 string
 757 PannerUI::short_astate_string (AutoState state)
 758 {
 759         return _astate_string (state, true);
 760 }
 761
 762 string
 763 PannerUI::_astate_string (AutoState state, bool shrt)
 764 {
 765         string sstr;
 766
 767         switch (state) {
 768         case Off:
 769                 sstr = (shrt ? "O" : _("O"));
 770                 break;
 771         case Play:
 772                 sstr = (shrt ? "P" : _("P"));
 773                 break;
 774         case Touch:
 775                 sstr = (shrt ? "T" : _("T"));
 776                 break;
 777         case Write:
 778                 sstr = (shrt ? "W" : _("W"));
 779                 break;
 780         }
 781
 782         return sstr;
 783 }
 784
 785 string
 786 PannerUI::astyle_string (AutoStyle style)
 787 {
 788         return _astyle_string (style, false);
 789 }
 790
 791 string
 792 PannerUI::short_astyle_string (AutoStyle style)
 793 {
 794         return _astyle_string (style, true);
 795 }
 796
 797 string
 798 PannerUI::_astyle_string (AutoStyle style, bool shrt)
 799 {
 800         if (style & Trim) {
 801                 return _("Trim");
 802         } else {
 803                 /* XXX it might different in different languages */
 804
 805                 return (shrt ? _("Abs") : _("Abs"));
 806         }
 807 }