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         set_width(Narrow);
 148
 149         _io.panner().Changed.connect (mem_fun(*this, &PannerUI::panner_changed));
 150         _io.panner().LinkStateChanged.connect (mem_fun(*this, &PannerUI::update_pan_linkage));
 151         _io.panner().StateChanged.connect (mem_fun(*this, &PannerUI::update_pan_state));
 152
 153         pan_changed (0);
 154         update_pan_sensitive ();
 155         update_pan_linkage ();
 156         pan_automation_state_changed ();
 157 }
 158
 159 bool
 160 PannerUI::panning_link_button_press (GdkEventButton* ev)
 161 {
 162         cerr << "link press\n";
 163         return true;
 164 }
 165
 166 bool
 167 PannerUI::panning_link_button_release (GdkEventButton* ev)
 168 {
 169         cerr << "link release\n";
 170         if (!ignore_toggle) {
 171                 _io.panner().set_linked (!_io.panner().linked());
 172         }
 173         return true;
 174 }
 175
 176 void
 177 PannerUI::panning_link_direction_clicked()
 178 {
 179         switch (_io.panner().link_direction()) {
 180         case Panner::SameDirection:
 181                 _io.panner().set_link_direction (Panner::OppositeDirection);
 182                 break;
 183         default:
 184                 _io.panner().set_link_direction (Panner::SameDirection);
 185                 break;
 186         }
 187 }
 188
 189 void
 190 PannerUI::update_pan_linkage ()
 191 {
 192         ENSURE_GUI_THREAD(mem_fun(*this, &PannerUI::update_pan_linkage));
 193
 194         bool x = _io.panner().linked();
 195         bool bx = panning_link_button.get_active();
 196
 197         if (x != bx) {
 198
 199                 ignore_toggle = true;
 200                 panning_link_button.set_active (x);
 201                 ignore_toggle = false;
 202         }
 203
 204         panning_link_direction_button.set_sensitive (x);
 205
 206         switch (_io.panner().link_direction()) {
 207         case Panner::SameDirection:
 208                 panning_link_direction_button.set_image (*(manage (new Image (get_xpm ("forwardblarrow.xpm")))));
 209                 break;
 210         default:
 211                 panning_link_direction_button.set_image (*(manage (new Image (get_xpm("revdblarrow.xpm")))));
 212                 break;
 213         }
 214 }
 215
 216 void
 217 PannerUI::set_width (Width w)
 218 {
 219         switch (w) {
 220         case Wide:
 221                 panning_viewport.set_size_request (61, 61);
 222                 if (panner) {
 223                         panner->set_size_request (61, 61);
 224                 }
 225                 for (vector<BarController*>::iterator i = pan_bars.begin(); i != pan_bars.end(); ++i) {
 226                                 (*i)->set_size_request (61, 15);
 227                 }
 228                 panning_link_button.set_label (_("link"));
 229                 break;
 230         case Narrow:
 231                 panning_viewport.set_size_request (31, 61);
 232                 if (panner) {
 233                         panner->set_size_request (31, 61);
 234                 }
 235                 for (vector<BarController*>::iterator i = pan_bars.begin(); i != pan_bars.end(); ++i) {
 236                                 (*i)->set_size_request (31, 15);
 237                 }
 238                 panning_link_button.set_label (_("L"));
 239                 break;
 240         }
 241
 242         _width = w;
 243 }
 244
 245
 246 PannerUI::~PannerUI ()
 247 {
 248         for (vector<Adjustment*>::iterator i = pan_adjustments.begin(); i != pan_adjustments.end(); ++i) {
 249                 delete (*i);
 250         }
 251
 252         for (vector<BarController*>::iterator i = pan_bars.begin(); i != pan_bars.end(); ++i) {
 253                 delete (*i);
 254         }
 255
 256         if (panner) {
 257                 delete panner;
 258         }
 259
 260         if (pan_menu) {
 261                 delete pan_menu;
 262         }
 263
 264 }
 265
 266
 267 void
 268 PannerUI::panner_changed ()
 269 {
 270         ENSURE_GUI_THREAD (mem_fun(*this, &PannerUI::panner_changed));
 271         setup_pan ();
 272 }
 273
 274 void
 275 PannerUI::update_pan_state ()
 276 {
 277         /* currently nothing to do */
 278         // ENSURE_GUI_THREAD (mem_fun(*this, &PannerUI::update_panner_state));
 279 }
 280
 281 void
 282 PannerUI::setup_pan ()
 283 {
 284         uint32_t nouts = _io.n_outputs ();
 285
 286         if (nouts == 0 || nouts == 1) {
 287
 288                 while (!pan_adjustments.empty()) {
 289                         delete pan_bars.back();
 290                         pan_bars.pop_back ();
 291                         delete pan_adjustments.back();
 292                         pan_adjustments.pop_back ();
 293                 }
 294
 295         } else if (nouts == 2) {
 296
 297                 vector<Adjustment*>::size_type asz;
 298                 uint32_t npans = _io.panner().size();
 299
 300                 while (!pan_adjustments.empty()) {
 301                         delete pan_bars.back();
 302                         pan_bars.pop_back ();
 303                         delete pan_adjustments.back();
 304                         pan_adjustments.pop_back ();
 305                 }
 306
 307                 while ((asz = pan_adjustments.size()) < npans) {
 308
 309                         float x;
 310                         BarController* bc;
 311
 312                         /* initialize adjustment with current value of panner */
 313
 314                         _io.panner()[asz]->get_position (x);
 315
 316                         pan_adjustments.push_back (new Adjustment (x, 0, 1.0, 0.05, 0.1));
 317                         pan_adjustments.back()->signal_value_changed().connect (bind (mem_fun(*this, &PannerUI::pan_adjustment_changed), (uint32_t) asz));
 318
 319                         _io.panner()[asz]->Changed.connect (bind (mem_fun(*this, &PannerUI::pan_value_changed), (uint32_t) asz));
 320
 321                         bc = new BarController (*pan_adjustments[asz],
 322                                                 &_io.panner()[asz]->midi_control(),
 323                                                 bind (mem_fun(*this, &PannerUI::pan_printer), pan_adjustments[asz]));
 324
 325                         if (_session.midi_port()) {
 326                                 _io.panner()[asz]->reset_midi_control (_session.midi_port(), true);
 327                         }
 328
 329                         bc->set_name ("PanSlider");
 330                         bc->set_shadow_type (Gtk::SHADOW_NONE);
 331                         bc->set_style (BarController::Line);
 332
 333                         bc->StartGesture.connect (bind (mem_fun (_io, &IO::start_pan_touch), (uint32_t) asz));
 334                         bc->StopGesture.connect (bind (mem_fun (_io, &IO::end_pan_touch), (uint32_t) asz));
 335
 336                         char buf[64];
 337 #ifdef __APPLE__
 338                         snprintf (buf, sizeof (buf), _("panner for channel %lu"), asz + 1);
 339 #else
 340                         snprintf (buf, sizeof (buf), _("panner for channel %u"), asz + 1);
 341 #endif
 342                         ARDOUR_UI::instance()->tooltips().set_tip (bc->event_widget(), buf);
 343
 344                         bc->event_widget().signal_button_release_event().connect
 345                                 (bind (mem_fun(*this, &PannerUI::pan_button_event), (uint32_t) asz));
 346
 347                         pan_bars.push_back (bc);
 348                         switch (_width) {
 349                         case Wide:
 350                                 pan_bars.back()->set_size_request (61, 15);
 351                                 break;
 352                         case Narrow:
 353                                 pan_bars.back()->set_size_request (31, 15);
 354                                 break;
 355                         }
 356
 357                         pan_bar_packer.pack_start (*pan_bars.back(), false, false);
 358                 }
 359
 360                 /* now that we actually have the pan bars,
 361                    set their sensitivity based on current
 362                    automation state.
 363                 */
 364
 365                 update_pan_sensitive ();
 366
 367                 panning_viewport.remove ();
 368                 panning_viewport.add (pan_bar_packer);
 369                 panning_viewport.show_all ();
 370
 371         } else {
 372
 373                 int w = 0;
 374
 375                 switch (_width) {
 376                 case Wide:
 377                         w = 61;
 378                         break;
 379                 case Narrow:
 380                         w = 31;
 381                         break;
 382                 }
 383
 384                 if (panner == 0) {
 385                         panner = new Panner2d (_io.panner(), w, 61);
 386                         panner->set_name ("MixerPanZone");
 387                         panner->show ();
 388                 }
 389
 390                 update_pan_sensitive ();
 391                 panner->reset (_io.n_inputs());
 392                 panner->set_size_request (w, 61);
 393
 394                 /* and finally, add it to the panner frame */
 395
 396                 panning_viewport.remove ();
 397                 panning_viewport.add (*panner);
 398                 panning_viewport.show_all ();
 399         }
 400 }
 401
 402 bool
 403 PannerUI::pan_button_event (GdkEventButton* ev, uint32_t which)
 404 {
 405         switch (ev->button) {
 406         case 3:
 407                 if (pan_menu == 0) {
 408                         pan_menu = manage (new Menu);
 409                         pan_menu->set_name ("ArdourContextMenu");
 410                 }
 411                 build_pan_menu (which);
 412                 pan_menu->popup (1, ev->time);
 413                 return true;
 414                 break;
 415         default:
 416                 return false;
 417         }
 418
 419         return false; // what's wrong with gcc?
 420 }
 421
 422 void
 423 PannerUI::build_pan_menu (uint32_t which)
 424 {
 425         using namespace Menu_Helpers;
 426         MenuList& items (pan_menu->items());
 427
 428         items.clear ();
 429
 430         items.push_back (CheckMenuElem (_("Mute")));
 431
 432         /* set state first, connect second */
 433
 434         (dynamic_cast<CheckMenuItem*> (&items.back()))->set_active (_io.panner()[which]->muted());
 435         (dynamic_cast<CheckMenuItem*> (&items.back()))->signal_toggled().connect
 436                 (bind (mem_fun(*this, &PannerUI::pan_mute), which));
 437
 438         items.push_back (CheckMenuElem (_("Bypass"), mem_fun(*this, &PannerUI::pan_bypass_toggle)));
 439         bypass_menu_item = static_cast<CheckMenuItem*> (&items.back());
 440
 441         /* set state first, connect second */
 442
 443         bypass_menu_item->set_active (_io.panner().bypassed());
 444         bypass_menu_item->signal_toggled().connect (mem_fun(*this, &PannerUI::pan_bypass_toggle));
 445
 446         items.push_back (MenuElem (_("Reset"), mem_fun(*this, &PannerUI::pan_reset)));
 447         items.push_back (SeparatorElem());
 448         items.push_back (MenuElem (_("Reset all")));
 449 }
 450
 451 void
 452 PannerUI::pan_mute (uint32_t which)
 453 {
 454         StreamPanner* sp = _io.panner()[which];
 455         sp->set_muted (!sp->muted());
 456 }
 457
 458 void
 459 PannerUI::pan_bypass_toggle ()
 460 {
 461         if (bypass_menu_item && (_io.panner().bypassed() != bypass_menu_item->get_active())) {
 462                 _io.panner().set_bypassed (!_io.panner().bypassed());
 463         }
 464 }
 465
 466 void
 467 PannerUI::pan_reset ()
 468 {
 469 }
 470
 471 void
 472 PannerUI::effective_pan_display ()
 473 {
 474         if (_io.panner().empty()) {
 475                 return;
 476         }
 477
 478         switch (_io.n_outputs()) {
 479         case 0:
 480         case 1:
 481                 /* relax */
 482                 break;
 483
 484         case 2:
 485                 update_pan_bars (true);
 486                 break;
 487
 488         default:
 489                 //panner->move_puck (pan_value (v, right), 0.5);
 490                 break;
 491         }
 492 }
 493
 494 void
 495 PannerUI::pan_changed (void *src)
 496 {
 497         if (src == this) {
 498                 return;
 499         }
 500
 501         switch (_io.panner().size()) {
 502         case 0:
 503                 panning_link_box.set_sensitive (false);
 504                 return;
 505         case 1:
 506                 panning_link_box.set_sensitive (false);
 507                 break;
 508         default:
 509                 panning_link_box.set_sensitive (true);
 510         }
 511
 512         uint32_t nouts = _io.n_outputs();
 513
 514         switch (nouts) {
 515         case 0:
 516         case 1:
 517                 /* relax */
 518                 break;
 519
 520         case 2:
 521                 update_pan_bars (false);
 522                 break;
 523
 524         default:
 525                 // panner->move_puck (pan_value (pans[0], pans[1]), 0.5);
 526                 break;
 527         }
 528 }
 529
 530 void
 531 PannerUI::pan_adjustment_changed (uint32_t which)
 532 {
 533         if (!in_pan_update && which < _io.panner().size()) {
 534
 535                 float xpos;
 536                 float val = pan_adjustments[which]->get_value ();
 537                 _io.panner()[which]->get_position (xpos);
 538
 539                 /* add a kinda-sorta detent for the middle */
 540
 541                 if (val != 0.5 && Panner::equivalent (val, 0.5)) {
 542                         /* this is going to be reentrant, so just
 543                            return after it.
 544                         */
 545
 546                         in_pan_update = true;
 547                         pan_adjustments[which]->set_value (0.5);
 548                         in_pan_update = false;
 549                         return;
 550                 }
 551
 552                 if (!Panner::equivalent (val, xpos)) {
 553
 554                         _io.panner()[which]->set_position (val);
 555                         /* XXX
 556                            the panner objects have no access to the session,
 557                            so do this here. ick.
 558                         */
 559                         _session.set_dirty();
 560                 }
 561         }
 562 }
 563
 564 void
 565 PannerUI::pan_value_changed (uint32_t which)
 566 {
 567         ENSURE_GUI_THREAD (bind (mem_fun(*this, &PannerUI::pan_value_changed), which));
 568
 569         if (_io.n_outputs() > 1 && which < _io.panner().size()) {
 570                 float xpos;
 571                 float val = pan_adjustments[which]->get_value ();
 572
 573                 _io.panner()[which]->get_position (xpos);
 574
 575                 if (!Panner::equivalent (val, xpos)) {
 576                         in_pan_update = true;
 577                         pan_adjustments[which]->set_value (xpos);
 578                         in_pan_update = false;
 579                 }
 580         }
 581 }
 582
 583 void
 584 PannerUI::update_pan_bars (bool only_if_aplay)
 585 {
 586         uint32_t n;
 587         vector<Adjustment*>::iterator i;
 588
 589         in_pan_update = true;
 590
 591         /* this runs during automation playback, and moves the bar controllers
 592            and/or pucks around.
 593         */
 594
 595         for (i = pan_adjustments.begin(), n = 0; i != pan_adjustments.end(); ++i, ++n) {
 596                 float xpos, val;
 597
 598                 if (only_if_aplay) {
 599                         AutomationList& alist (_io.panner()[n]->automation());
 600
 601                         if (!alist.automation_playback()) {
 602                                 continue;
 603                         }
 604                 }
 605
 606                 _io.panner()[n]->get_effective_position (xpos);
 607                 val = (*i)->get_value ();
 608
 609                 if (!Panner::equivalent (val, xpos)) {
 610                         (*i)->set_value (xpos);
 611                 }
 612         }
 613
 614         in_pan_update = false;
 615 }
 616
 617 void
 618 PannerUI::pan_printer (char *buf, uint32_t len, Adjustment* adj)
 619 {
 620         float val = adj->get_value();
 621
 622         if (val == 0.0f) {
 623                 snprintf (buf, len, X_("L"));
 624         } else if (val == 1.0f) {
 625                 snprintf (buf, len, X_("R"));
 626         } else if (Panner::equivalent (val, 0.5f)) {
 627                 snprintf (buf, len, X_("C"));
 628         } else {
 629                 /* don't print anything */
 630                 buf[0] = '\0';
 631         }
 632 }
 633
 634 void
 635 PannerUI::update_pan_sensitive ()
 636 {
 637         bool sensitive = !(_io.panner().automation_state() & Play);
 638
 639         switch (_io.n_outputs()) {
 640         case 0:
 641         case 1:
 642                 break;
 643         case 2:
 644                 for (vector<BarController*>::iterator i = pan_bars.begin(); i != pan_bars.end(); ++i) {
 645                         (*i)->set_sensitive (sensitive);
 646                 }
 647                 break;
 648         default:
 649                 if (panner) {
 650                         panner->set_sensitive (sensitive);
 651                 }
 652                 break;
 653         }
 654 }
 655
 656 gint
 657 PannerUI::pan_automation_state_button_event (GdkEventButton *ev)
 658 {
 659         using namespace Menu_Helpers;
 660
 661         if (ev->type == GDK_BUTTON_RELEASE) {
 662                 return TRUE;
 663         }
 664
 665         switch (ev->button) {
 666         case 1:
 667                 pan_astate_menu.popup (1, ev->time);
 668                 break;
 669         default:
 670                 break;
 671         }
 672
 673         return TRUE;
 674 }
 675
 676 gint
 677 PannerUI::pan_automation_style_button_event (GdkEventButton *ev)
 678 {
 679         if (ev->type == GDK_BUTTON_RELEASE) {
 680                 return TRUE;
 681         }
 682
 683         switch (ev->button) {
 684         case 1:
 685                 pan_astyle_menu.popup (1, ev->time);
 686                 break;
 687         default:
 688                 break;
 689         }
 690         return TRUE;
 691 }
 692
 693 void
 694 PannerUI::pan_automation_style_changed ()
 695 {
 696         ENSURE_GUI_THREAD(mem_fun(*this, &PannerUI::pan_automation_style_changed));
 697
 698         switch (_width) {
 699         case Wide:
 700                 pan_automation_style_button.set_label (astyle_string(_io.panner().automation_style()));
 701                 break;
 702         case Narrow:
 703                 pan_automation_style_button.set_label (short_astyle_string(_io.panner().automation_style()));
 704                 break;
 705         }
 706 }
 707
 708 void
 709 PannerUI::pan_automation_state_changed ()
 710 {
 711         ENSURE_GUI_THREAD(mem_fun(*this, &PannerUI::pan_automation_state_changed));
 712
 713         bool x;
 714
 715         switch (_width) {
 716         case Wide:
 717           pan_automation_state_button.set_label (astate_string(_io.panner().automation_state()));
 718                 break;
 719         case Narrow:
 720           pan_automation_state_button.set_label (short_astate_string(_io.panner().automation_state()));
 721                 break;
 722         }
 723
 724         /* when creating a new session, we get to create busses (and
 725            sometimes tracks) with no outputs by the time they get
 726            here.
 727         */
 728
 729         if (_io.panner().empty()) {
 730                 return;
 731         }
 732
 733         x = (_io.panner().front()->automation().automation_state() != Off);
 734
 735         if (pan_automation_state_button.get_active() != x) {
 736         ignore_toggle = true;
 737                 pan_automation_state_button.set_active (x);
 738                 ignore_toggle = false;
 739         }
 740
 741         update_pan_sensitive ();
 742
 743         /* start watching automation so that things move */
 744
 745         pan_watching.disconnect();
 746
 747         if (x) {
 748           pan_watching = ARDOUR_UI::RapidScreenUpdate.connect (mem_fun (*this, &PannerUI::effective_pan_display));
 749         }
 750 }
 751
 752 string
 753 PannerUI::astate_string (AutoState state)
 754 {
 755         return _astate_string (state, false);
 756 }
 757
 758 string
 759 PannerUI::short_astate_string (AutoState state)
 760 {
 761         return _astate_string (state, true);
 762 }
 763
 764 string
 765 PannerUI::_astate_string (AutoState state, bool shrt)
 766 {
 767         string sstr;
 768
 769         switch (state) {
 770         case Off:
 771                 sstr = (shrt ? "O" : _("O"));
 772                 break;
 773         case Play:
 774                 sstr = (shrt ? "P" : _("P"));
 775                 break;
 776         case Touch:
 777                 sstr = (shrt ? "T" : _("T"));
 778                 break;
 779         case Write:
 780                 sstr = (shrt ? "W" : _("W"));
 781                 break;
 782         }
 783
 784         return sstr;
 785 }
 786
 787 string
 788 PannerUI::astyle_string (AutoStyle style)
 789 {
 790         return _astyle_string (style, false);
 791 }
 792
 793 string
 794 PannerUI::short_astyle_string (AutoStyle style)
 795 {
 796         return _astyle_string (style, true);
 797 }
 798
 799 string
 800 PannerUI::_astyle_string (AutoStyle style, bool shrt)
 801 {
 802         if (style & Trim) {
 803                 return _("Trim");
 804         } else {
 805                 /* XXX it might different in different languages */
 806
 807                 return (shrt ? _("Abs") : _("Abs"));
 808         }
 809 }