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/stop_signal.h>
  25 #include <gtkmm2ext/barcontroller.h>
  26 #include <midi++/manager.h>
  27 #include <pbd/fastlog.h>
  28
  29 #include "ardour_ui.h"
  30 #include "panner_ui.h"
  31 #include "panner2d.h"
  32 #include "utils.h"
  33 #include "panner.h"
  34 #include "gui_thread.h"
  35
  36 #include <ardour/session.h>
  37 #include <ardour/panner.h>
  38 #include <ardour/route.h>
  39
  40 #include "i18n.h"
  41
  42 using namespace ARDOUR;
  43 using namespace PBD;
  44 using namespace Gtkmm2ext;
  45 using namespace Gtk;
  46 using namespace sigc;
  47
  48 const int PannerUI::pan_bar_height = 30;
  49
  50 PannerUI::PannerUI (boost::shared_ptr<IO> io, Session& s)
  51         : _io (io),
  52           _session (s),
  53           hAdjustment(0.0, 0.0, 0.0),
  54           vAdjustment(0.0, 0.0, 0.0),
  55           panning_viewport(hAdjustment, vAdjustment),
  56           panning_up_arrow (Gtk::ARROW_UP, Gtk::SHADOW_OUT),
  57           panning_down_arrow (Gtk::ARROW_DOWN, Gtk::SHADOW_OUT),
  58           panning_link_button (_("link")),
  59           pan_automation_style_button (""),
  60           pan_automation_state_button ("")
  61 {
  62         ignore_toggle = false;
  63         pan_menu = 0;
  64         in_pan_update = false;
  65
  66         pan_automation_style_button.set_name ("MixerAutomationModeButton");
  67         pan_automation_state_button.set_name ("MixerAutomationPlaybackButton");
  68
  69         ARDOUR_UI::instance()->tooltips().set_tip (pan_automation_state_button, _("Pan automation mode"));
  70         ARDOUR_UI::instance()->tooltips().set_tip (pan_automation_style_button, _("Pan automation type"));
  71
  72         //set_size_request_to_display_given_text (pan_automation_state_button, X_("O"), 2, 2);
  73         //set_size_request_to_display_given_text (pan_automation_style_button, X_("0"), 2, 2);
  74
  75         pan_bar_packer.set_size_request (-1, 61);
  76         panning_viewport.set_size_request (-1, 61);
  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         panning_link_button.set_name (X_("PanningLinkButton"));
 107         panning_link_direction_button.set_name (X_("PanningLinkDirectionButton"));
 108
 109         panning_link_box.pack_start (panning_link_button, true, true);
 110         panning_link_box.pack_start (panning_link_direction_button, true, true);
 111         panning_link_box.pack_start (pan_automation_state_button, true, true);
 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         panning_link_direction_button.add (*(manage (new Image (get_xpm("forwardblarrow.xpm")))));
 117
 118         panning_link_direction_button.signal_clicked().connect
 119                 (mem_fun(*this, &PannerUI::panning_link_direction_clicked));
 120
 121         panning_link_button.signal_button_press_event().connect
 122                 (mem_fun(*this, &PannerUI::panning_link_button_press), false);
 123         panning_link_button.signal_button_release_event().connect
 124                 (mem_fun(*this, &PannerUI::panning_link_button_release), false);
 125
 126         panning_up.set_border_width (3);
 127         panning_down.set_border_width (3);
 128         panning_up.add (panning_up_arrow);
 129         panning_down.add (panning_down_arrow);
 130         panning_up.set_name (X_("PanScrollerBase"));
 131         panning_down.set_name (X_("PanScrollerBase"));
 132         panning_up_arrow.set_name (X_("PanScrollerArrow"));
 133         panning_down_arrow.set_name (X_("PanScrollerArrow"));
 134
 135         pan_vbox.set_spacing (2);
 136         pan_vbox.pack_start (panning_viewport, Gtk::PACK_SHRINK);
 137         pan_vbox.pack_start (panning_link_box, Gtk::PACK_SHRINK);
 138
 139         pack_start (pan_vbox, true, true);
 140
 141         panner = 0;
 142
 143         set_width(Narrow);
 144
 145         _io->panner().Changed.connect (mem_fun(*this, &PannerUI::panner_changed));
 146         _io->panner().LinkStateChanged.connect (mem_fun(*this, &PannerUI::update_pan_linkage));
 147         _io->panner().StateChanged.connect (mem_fun(*this, &PannerUI::update_pan_state));
 148
 149         pan_changed (0);
 150         update_pan_sensitive ();
 151         update_pan_linkage ();
 152         pan_automation_state_changed ();
 153
 154         pan_bar_packer.show();
 155         panning_viewport.show();
 156         panning_up.show();
 157         panning_up_arrow.show();
 158         panning_down.show();
 159         panning_down_arrow.show();
 160         pan_vbox.show();
 161         panning_link_button.show();
 162         panning_link_direction_button.show();
 163         panning_link_box.show();
 164         pan_automation_style_button.show();
 165         pan_automation_state_button.show();
 166         show();
 167 }
 168
 169 PBD::Controllable*
 170 PannerUI::get_controllable()
 171 {
 172         return pan_bars[0]->get_controllable();
 173 }
 174
 175 bool
 176 PannerUI::panning_link_button_press (GdkEventButton* ev)
 177 {
 178         cerr << "link press\n";
 179         return true;
 180 }
 181
 182 bool
 183 PannerUI::panning_link_button_release (GdkEventButton* ev)
 184 {
 185         cerr << "link release\n";
 186         if (!ignore_toggle) {
 187                 _io->panner().set_linked (!_io->panner().linked());
 188         }
 189         return true;
 190 }
 191
 192 void
 193 PannerUI::panning_link_direction_clicked()
 194 {
 195         switch (_io->panner().link_direction()) {
 196         case Panner::SameDirection:
 197                 _io->panner().set_link_direction (Panner::OppositeDirection);
 198                 break;
 199         default:
 200                 _io->panner().set_link_direction (Panner::SameDirection);
 201                 break;
 202         }
 203 }
 204
 205 void
 206 PannerUI::update_pan_linkage ()
 207 {
 208         ENSURE_GUI_THREAD(mem_fun(*this, &PannerUI::update_pan_linkage));
 209
 210         bool x = _io->panner().linked();
 211         bool bx = panning_link_button.get_active();
 212
 213         if (x != bx) {
 214
 215                 ignore_toggle = true;
 216                 panning_link_button.set_active (x);
 217                 ignore_toggle = false;
 218         }
 219
 220         panning_link_direction_button.set_sensitive (x);
 221
 222         switch (_io->panner().link_direction()) {
 223         case Panner::SameDirection:
 224                 panning_link_direction_button.set_image (*(manage (new Image (get_xpm ("forwardblarrow.xpm")))));
 225                 break;
 226         default:
 227                 panning_link_direction_button.set_image (*(manage (new Image (get_xpm("revdblarrow.xpm")))));
 228                 break;
 229         }
 230 }
 231
 232 void
 233 PannerUI::set_width (Width w)
 234 {
 235         switch (w) {
 236         case Wide:
 237                 panning_link_button.set_label (_("link"));
 238                 break;
 239         case Narrow:
 240                 panning_link_button.set_label (_("L"));
 241                 break;
 242         }
 243
 244         _width = w;
 245 }
 246
 247
 248 PannerUI::~PannerUI ()
 249 {
 250         for (vector<Adjustment*>::iterator i = pan_adjustments.begin(); i != pan_adjustments.end(); ++i) {
 251                 delete (*i);
 252         }
 253
 254         for (vector<PannerBar*>::iterator i = pan_bars.begin(); i != pan_bars.end(); ++i) {
 255                 delete (*i);
 256         }
 257
 258         if (panner) {
 259                 delete panner;
 260         }
 261
 262         if (pan_menu) {
 263                 delete pan_menu;
 264         }
 265
 266 }
 267
 268
 269 void
 270 PannerUI::panner_changed ()
 271 {
 272         ENSURE_GUI_THREAD (mem_fun(*this, &PannerUI::panner_changed));
 273         setup_pan ();
 274 }
 275
 276 void
 277 PannerUI::update_pan_state ()
 278 {
 279         /* currently nothing to do */
 280         // ENSURE_GUI_THREAD (mem_fun(*this, &PannerUI::update_panner_state));
 281 }
 282
 283 void
 284 PannerUI::setup_pan ()
 285 {
 286         uint32_t nouts = _io->n_outputs ().n_audio();
 287
 288         if (nouts == 0 || nouts == 1) {
 289
 290                 while (!pan_adjustments.empty()) {
 291                         delete pan_bars.back();
 292                         pan_bars.pop_back ();
 293                         delete pan_adjustments.back();
 294                         pan_adjustments.pop_back ();
 295                 }
 296
 297                 /* stick something into the panning viewport so that it redraws */
 298
 299                 EventBox* eb = manage (new EventBox());
 300                 panning_viewport.remove ();
 301                 panning_viewport.add (*eb);
 302                 panning_viewport.show_all ();
 303
 304         } else if (nouts == 2) {
 305
 306                 vector<Adjustment*>::size_type asz;
 307                 uint32_t npans = _io->panner().size();
 308
 309                 while (!pan_adjustments.empty()) {
 310                         delete pan_bars.back();
 311                         pan_bars.pop_back ();
 312                         delete pan_adjustments.back();
 313                         pan_adjustments.pop_back ();
 314                 }
 315
 316                 while ((asz = pan_adjustments.size()) < npans) {
 317
 318                         float x, rx;
 319                         PannerBar* bc;
 320
 321                         /* initialize adjustment with 0.0 (L) or 1.0 (R) for the first and second panners,
 322                            which serves as a default, otherwise use current value */
 323
 324                         _io->panner()[asz]->get_position (rx);
 325
 326                         if (npans == 1) {
 327                                 x = 0.5;
 328                         } else if (asz == 0) {
 329                                 x = 0.0;
 330                         } else if (asz == 1) {
 331                                 x = 1.0;
 332                         } else {
 333                                 x = rx;
 334                         }
 335
 336                         pan_adjustments.push_back (new Adjustment (x, 0, 1.0, 0.05, 0.1));
 337                         bc = new PannerBar (*pan_adjustments[asz], _io->panner()[asz]->pan_control());
 338
 339                         /* now set adjustment with current value of panner, then connect the signals */
 340                         pan_adjustments.back()->set_value(rx);
 341                         pan_adjustments.back()->signal_value_changed().connect (bind (mem_fun(*this, &PannerUI::pan_adjustment_changed), (uint32_t) asz));
 342
 343                         _io->panner()[asz]->Changed.connect (bind (mem_fun(*this, &PannerUI::pan_value_changed), (uint32_t) asz));
 344
 345
 346                         bc->set_name ("PanSlider");
 347                         bc->set_shadow_type (Gtk::SHADOW_NONE);
 348
 349                         bc->StartGesture.connect (bind (mem_fun (*_io, &IO::start_pan_touch), (uint32_t) asz));
 350                         bc->StopGesture.connect (bind (mem_fun (*_io, &IO::end_pan_touch), (uint32_t) asz));
 351
 352                         char buf[64];
 353                         snprintf (buf, sizeof (buf), _("panner for channel %zu"), asz + 1);
 354                         ARDOUR_UI::instance()->tooltips().set_tip (bc->event_widget(), buf);
 355
 356                         bc->event_widget().signal_button_release_event().connect
 357                                 (bind (mem_fun(*this, &PannerUI::pan_button_event), (uint32_t) asz));
 358
 359                         bc->set_size_request (-1, pan_bar_height);
 360
 361                         pan_bars.push_back (bc);
 362                         pan_bar_packer.pack_start (*bc, false, false);
 363                 }
 364
 365                 /* now that we actually have the pan bars,
 366                    set their sensitivity based on current
 367                    automation state.
 368                 */
 369
 370                 update_pan_sensitive ();
 371
 372                 panning_viewport.remove ();
 373                 panning_viewport.add (pan_bar_packer);
 374                 panning_viewport.show_all ();
 375
 376         } else {
 377
 378                 if (panner == 0) {
 379                         panner = new Panner2d (_io->panner(), 61);
 380                         panner->set_name ("MixerPanZone");
 381                         panner->show ();
 382                 }
 383
 384                 update_pan_sensitive ();
 385                 panner->reset (_io->n_inputs().n_audio());
 386                 panner->set_size_request (-1, 61);
 387
 388                 /* and finally, add it to the panner frame */
 389
 390                 panning_viewport.remove ();
 391                 panning_viewport.add (*panner);
 392                 panning_viewport.show_all ();
 393         }
 394 }
 395
 396 bool
 397 PannerUI::pan_button_event (GdkEventButton* ev, uint32_t which)
 398 {
 399         switch (ev->button) {
 400         case 3:
 401                 if (pan_menu == 0) {
 402                         pan_menu = manage (new Menu);
 403                         pan_menu->set_name ("ArdourContextMenu");
 404                 }
 405                 build_pan_menu (which);
 406                 pan_menu->popup (1, ev->time);
 407                 return true;
 408                 break;
 409         default:
 410                 return false;
 411         }
 412
 413         return false; // what's wrong with gcc?
 414 }
 415
 416 void
 417 PannerUI::build_pan_menu (uint32_t which)
 418 {
 419         using namespace Menu_Helpers;
 420         MenuList& items (pan_menu->items());
 421
 422         items.clear ();
 423
 424         items.push_back (CheckMenuElem (_("Mute")));
 425
 426         /* set state first, connect second */
 427
 428         (dynamic_cast<CheckMenuItem*> (&items.back()))->set_active (_io->panner()[which]->muted());
 429         (dynamic_cast<CheckMenuItem*> (&items.back()))->signal_toggled().connect
 430                 (bind (mem_fun(*this, &PannerUI::pan_mute), which));
 431
 432         items.push_back (CheckMenuElem (_("Bypass"), mem_fun(*this, &PannerUI::pan_bypass_toggle)));
 433         bypass_menu_item = static_cast<CheckMenuItem*> (&items.back());
 434
 435         /* set state first, connect second */
 436
 437         bypass_menu_item->set_active (_io->panner().bypassed());
 438         bypass_menu_item->signal_toggled().connect (mem_fun(*this, &PannerUI::pan_bypass_toggle));
 439
 440         items.push_back (MenuElem (_("Reset"), mem_fun(*this, &PannerUI::pan_reset)));
 441         items.push_back (SeparatorElem());
 442         items.push_back (MenuElem (_("Reset all")));
 443 }
 444
 445 void
 446 PannerUI::pan_mute (uint32_t which)
 447 {
 448         StreamPanner* sp = _io->panner()[which];
 449         sp->set_muted (!sp->muted());
 450 }
 451
 452 void
 453 PannerUI::pan_bypass_toggle ()
 454 {
 455         if (bypass_menu_item && (_io->panner().bypassed() != bypass_menu_item->get_active())) {
 456                 _io->panner().set_bypassed (!_io->panner().bypassed());
 457         }
 458 }
 459
 460 void
 461 PannerUI::pan_reset ()
 462 {
 463 }
 464
 465 void
 466 PannerUI::effective_pan_display ()
 467 {
 468         if (_io->panner().empty()) {
 469                 return;
 470         }
 471
 472         switch (_io->n_outputs().n_audio()) {
 473         case 0:
 474         case 1:
 475                 /* relax */
 476                 break;
 477
 478         case 2:
 479                 update_pan_bars (true);
 480                 break;
 481
 482         default:
 483                 //panner->move_puck (pan_value (v, right), 0.5);
 484                 break;
 485         }
 486 }
 487
 488 void
 489 PannerUI::pan_changed (void *src)
 490 {
 491         if (src == this) {
 492                 return;
 493         }
 494
 495         switch (_io->panner().size()) {
 496         case 0:
 497                 panning_link_direction_button.set_sensitive (false);
 498                 panning_link_button.set_sensitive (false);
 499                 return;
 500         case 1:
 501                 panning_link_direction_button.set_sensitive (false);
 502                 panning_link_button.set_sensitive (false);
 503                 break;
 504         default:
 505                 panning_link_direction_button.set_sensitive (true);
 506                 panning_link_button.set_sensitive (true);
 507         }
 508
 509         uint32_t nouts = _io->n_outputs().n_audio();
 510
 511         switch (nouts) {
 512         case 0:
 513         case 1:
 514                 /* relax */
 515                 break;
 516
 517         case 2:
 518                 update_pan_bars (false);
 519                 break;
 520
 521         default:
 522                 // panner->move_puck (pan_value (pans[0], pans[1]), 0.5);
 523                 break;
 524         }
 525 }
 526
 527 void
 528 PannerUI::pan_adjustment_changed (uint32_t which)
 529 {
 530         if (!in_pan_update && which < _io->panner().size()) {
 531
 532                 float xpos;
 533                 float val = pan_adjustments[which]->get_value ();
 534                 _io->panner()[which]->get_position (xpos);
 535
 536                 /* add a kinda-sorta detent for the middle */
 537
 538                 if (val != 0.5 && Panner::equivalent (val, 0.5)) {
 539                         /* this is going to be reentrant, so just
 540                            return after it.
 541                         */
 542
 543                         in_pan_update = true;
 544                         pan_adjustments[which]->set_value (0.5);
 545                         in_pan_update = false;
 546                         return;
 547                 }
 548
 549                 if (!Panner::equivalent (val, xpos)) {
 550
 551                         _io->panner()[which]->set_position (val);
 552                         /* XXX
 553                            the panner objects have no access to the session,
 554                            so do this here. ick.
 555                         */
 556                         _session.set_dirty();
 557                 }
 558         }
 559 }
 560
 561 void
 562 PannerUI::pan_value_changed (uint32_t which)
 563 {
 564         ENSURE_GUI_THREAD (bind (mem_fun(*this, &PannerUI::pan_value_changed), which));
 565
 566         if (_io->n_outputs().n_audio() > 1 && which < _io->panner().size()) {
 567                 float xpos;
 568                 float val = pan_adjustments[which]->get_value ();
 569
 570                 _io->panner()[which]->get_position (xpos);
 571
 572                 if (!Panner::equivalent (val, xpos)) {
 573                         in_pan_update = true;
 574                         pan_adjustments[which]->set_value (xpos);
 575                         in_pan_update = false;
 576                 }
 577         }
 578 }
 579
 580 void
 581 PannerUI::update_pan_bars (bool only_if_aplay)
 582 {
 583         uint32_t n;
 584         vector<Adjustment*>::iterator i;
 585
 586         in_pan_update = true;
 587
 588         /* this runs during automation playback, and moves the bar controllers
 589            and/or pucks around.
 590         */
 591
 592         for (i = pan_adjustments.begin(), n = 0; i != pan_adjustments.end(); ++i, ++n) {
 593                 float xpos, val;
 594
 595                 if (only_if_aplay) {
 596                         boost::shared_ptr<AutomationList> alist (_io->panner()[n]->pan_control()->list());
 597
 598                         if (!alist->automation_playback()) {
 599                                 continue;
 600                         }
 601                 }
 602
 603                 _io->panner()[n]->get_effective_position (xpos);
 604                 val = (*i)->get_value ();
 605
 606                 if (!Panner::equivalent (val, xpos)) {
 607                         (*i)->set_value (xpos);
 608                 }
 609         }
 610
 611         in_pan_update = false;
 612 }
 613
 614 void
 615 PannerUI::pan_printer (char *buf, uint32_t len, Adjustment* adj)
 616 {
 617         float val = adj->get_value();
 618
 619         if (val == 0.0f) {
 620                 snprintf (buf, len, X_("L"));
 621         } else if (val == 1.0f) {
 622                 snprintf (buf, len, X_("R"));
 623         } else if (Panner::equivalent (val, 0.5f)) {
 624                 snprintf (buf, len, X_("C"));
 625         } else {
 626                 /* don't print anything */
 627                 buf[0] = '\0';
 628         }
 629 }
 630
 631 void
 632 PannerUI::update_pan_sensitive ()
 633 {
 634         bool sensitive = !(_io->panner().automation_state() & Play);
 635
 636         switch (_io->n_outputs().n_audio()) {
 637         case 0:
 638         case 1:
 639                 break;
 640         case 2:
 641                 for (vector<PannerBar*>::iterator i = pan_bars.begin(); i != pan_bars.end(); ++i) {
 642                         (*i)->set_sensitive (sensitive);
 643                 }
 644                 break;
 645         default:
 646                 if (panner) {
 647                         panner->set_sensitive (sensitive);
 648                 }
 649                 break;
 650         }
 651 }
 652
 653 gint
 654 PannerUI::pan_automation_state_button_event (GdkEventButton *ev)
 655 {
 656         using namespace Menu_Helpers;
 657
 658         if (ev->type == GDK_BUTTON_RELEASE) {
 659                 return TRUE;
 660         }
 661
 662         switch (ev->button) {
 663         case 1:
 664                 pan_astate_menu.popup (1, ev->time);
 665                 break;
 666         default:
 667                 break;
 668         }
 669
 670         return TRUE;
 671 }
 672
 673 gint
 674 PannerUI::pan_automation_style_button_event (GdkEventButton *ev)
 675 {
 676         if (ev->type == GDK_BUTTON_RELEASE) {
 677                 return TRUE;
 678         }
 679
 680         switch (ev->button) {
 681         case 1:
 682                 pan_astyle_menu.popup (1, ev->time);
 683                 break;
 684         default:
 685                 break;
 686         }
 687         return TRUE;
 688 }
 689
 690 void
 691 PannerUI::pan_automation_style_changed ()
 692 {
 693         ENSURE_GUI_THREAD(mem_fun(*this, &PannerUI::pan_automation_style_changed));
 694
 695         switch (_width) {
 696         case Wide:
 697                 pan_automation_style_button.set_label (astyle_string(_io->panner().automation_style()));
 698                 break;
 699         case Narrow:
 700                 pan_automation_style_button.set_label (short_astyle_string(_io->panner().automation_style()));
 701                 break;
 702         }
 703 }
 704
 705 void
 706 PannerUI::pan_automation_state_changed ()
 707 {
 708         ENSURE_GUI_THREAD(mem_fun(*this, &PannerUI::pan_automation_state_changed));
 709
 710         bool x;
 711
 712         switch (_width) {
 713         case Wide:
 714           pan_automation_state_button.set_label (astate_string(_io->panner().automation_state()));
 715                 break;
 716         case Narrow:
 717           pan_automation_state_button.set_label (short_astate_string(_io->panner().automation_state()));
 718                 break;
 719         }
 720
 721         /* when creating a new session, we get to create busses (and
 722            sometimes tracks) with no outputs by the time they get
 723            here.
 724         */
 725
 726         if (_io->panner().empty()) {
 727                 return;
 728         }
 729
 730         x = (_io->panner().front()->pan_control()->list()->automation_state() != Off);
 731
 732         if (pan_automation_state_button.get_active() != x) {
 733         ignore_toggle = true;
 734                 pan_automation_state_button.set_active (x);
 735                 ignore_toggle = false;
 736         }
 737
 738         update_pan_sensitive ();
 739
 740         /* start watching automation so that things move */
 741
 742         pan_watching.disconnect();
 743
 744         if (x) {
 745           pan_watching = ARDOUR_UI::RapidScreenUpdate.connect (mem_fun (*this, &PannerUI::effective_pan_display));
 746         }
 747 }
 748
 749 string
 750 PannerUI::astate_string (AutoState state)
 751 {
 752         return _astate_string (state, false);
 753 }
 754
 755 string
 756 PannerUI::short_astate_string (AutoState state)
 757 {
 758         return _astate_string (state, true);
 759 }
 760
 761 string
 762 PannerUI::_astate_string (AutoState state, bool shrt)
 763 {
 764         string sstr;
 765
 766         switch (state) {
 767         case Off:
 768                 sstr = (shrt ? "M" : _("M"));
 769                 break;
 770         case Play:
 771                 sstr = (shrt ? "P" : _("P"));
 772                 break;
 773         case Touch:
 774                 sstr = (shrt ? "T" : _("T"));
 775                 break;
 776         case Write:
 777                 sstr = (shrt ? "W" : _("W"));
 778                 break;
 779         }
 780
 781         return sstr;
 782 }
 783
 784 string
 785 PannerUI::astyle_string (AutoStyle style)
 786 {
 787         return _astyle_string (style, false);
 788 }
 789
 790 string
 791 PannerUI::short_astyle_string (AutoStyle style)
 792 {
 793         return _astyle_string (style, true);
 794 }
 795
 796 string
 797 PannerUI::_astyle_string (AutoStyle style, bool shrt)
 798 {
 799         if (style & Trim) {
 800                 return _("Trim");
 801         } else {
 802                 /* XXX it might different in different languages */
 803
 804                 return (shrt ? _("Abs") : _("Abs"));
 805         }
 806 }