gtk2_ardour/gain_meter.cc

   1 /*
   2   Copyright (C) 2002 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
  20 #include <limits.h>
  21
  22 #include <ardour/io.h>
  23 #include <ardour/route.h>
  24 #include <ardour/route_group.h>
  25 #include <ardour/session.h>
  26 #include <ardour/session_route.h>
  27 #include <ardour/dB.h>
  28
  29 #include <gtkmm/style.h>
  30 #include <gdkmm/color.h>
  31 #include <gtkmm2ext/utils.h>
  32 #include <gtkmm2ext/fastmeter.h>
  33 #include <gtkmm2ext/stop_signal.h>
  34 #include <gtkmm2ext/barcontroller.h>
  35 #include <gtkmm2ext/gtk_ui.h>
  36 #include <midi++/manager.h>
  37 #include <pbd/fastlog.h>
  38 #include <pbd/stacktrace.h>
  39
  40 #include "ardour_ui.h"
  41 #include "gain_meter.h"
  42 #include "utils.h"
  43 #include "logmeter.h"
  44 #include "gui_thread.h"
  45 #include "keyboard.h"
  46 #include "public_editor.h"
  47
  48 #include <ardour/session.h>
  49 #include <ardour/route.h>
  50 #include <ardour/meter.h>
  51
  52 #include "i18n.h"
  53
  54 using namespace ARDOUR;
  55 using namespace PBD;
  56 using namespace Gtkmm2ext;
  57 using namespace Gtk;
  58 using namespace sigc;
  59 using namespace std;
  60
  61 sigc::signal<void> GainMeterBase::ResetAllPeakDisplays;
  62 sigc::signal<void,RouteGroup*> GainMeterBase::ResetGroupPeakDisplays;
  63
  64 map<string,Glib::RefPtr<Gdk::Pixmap> > GainMeter::metric_pixmaps;
  65 Glib::RefPtr<Gdk::Pixbuf> GainMeter::slider;
  66
  67
  68 void
  69 GainMeter::setup_slider_pix ()
  70 {
  71         if ((slider = ::get_icon ("fader_belt")) == 0) {
  72                 throw failed_constructor();
  73         }
  74 }
  75
  76 GainMeterBase::GainMeterBase (Session& s,
  77                               const Glib::RefPtr<Gdk::Pixbuf>& pix,
  78                               bool horizontal)
  79         : _session (s),
  80           // 0.781787 is the value needed for gain to be set to 0.
  81           gain_adjustment (0.781787, 0.0, 1.0, 0.01, 0.1),
  82           gain_automation_style_button (""),
  83           gain_automation_state_button ("")
  84
  85 {
  86         using namespace Menu_Helpers;
  87
  88         ignore_toggle = false;
  89         meter_menu = 0;
  90         next_release_selects = false;
  91         style_changed = true;
  92         _width = Wide;
  93
  94         if (horizontal) {
  95                 gain_slider = manage (new HSliderController (pix,
  96                                                              &gain_adjustment,
  97                                                              false));
  98         } else {
  99                 gain_slider = manage (new VSliderController (pix,
 100                                                              &gain_adjustment,
 101                                                              false));
 102         }
 103
 104         level_meter = new LevelMeter(_session);
 105
 106         gain_slider->signal_button_press_event().connect (mem_fun(*this, &GainMeter::start_gain_touch));
 107         gain_slider->signal_button_release_event().connect (mem_fun(*this, &GainMeter::end_gain_touch));
 108         gain_slider->set_name ("GainFader");
 109
 110         gain_display.set_name ("MixerStripGainDisplay");
 111         gain_display.set_has_frame (false);
 112         set_size_request_to_display_given_text (gain_display, "-80.g", 2, 6); /* note the descender */
 113         gain_display.signal_activate().connect (mem_fun (*this, &GainMeter::gain_activated));
 114         gain_display.signal_focus_in_event().connect (mem_fun (*this, &GainMeter::gain_focused), false);
 115         gain_display.signal_focus_out_event().connect (mem_fun (*this, &GainMeter::gain_focused), false);
 116
 117         peak_display.set_name ("MixerStripPeakDisplay");
 118 //      peak_display.set_has_frame (false);
 119 //      peak_display.set_editable (false);
 120         set_size_request_to_display_given_text  (peak_display, "-80.g", 2, 6); /* note the descender */
 121         max_peak = minus_infinity();
 122         peak_display.set_label (_("-inf"));
 123         peak_display.unset_flags (Gtk::CAN_FOCUS);
 124
 125         gain_automation_style_button.set_name ("MixerAutomationModeButton");
 126         gain_automation_state_button.set_name ("MixerAutomationPlaybackButton");
 127
 128         ARDOUR_UI::instance()->tooltips().set_tip (gain_automation_state_button, _("Fader automation mode"));
 129         ARDOUR_UI::instance()->tooltips().set_tip (gain_automation_style_button, _("Fader automation type"));
 130
 131         gain_automation_style_button.unset_flags (Gtk::CAN_FOCUS);
 132         gain_automation_state_button.unset_flags (Gtk::CAN_FOCUS);
 133
 134         gain_automation_state_button.set_size_request(15, 15);
 135         gain_automation_style_button.set_size_request(15, 15);
 136
 137         gain_astyle_menu.items().push_back (MenuElem (_("Trim")));
 138         gain_astyle_menu.items().push_back (MenuElem (_("Abs")));
 139
 140         gain_astate_menu.set_name ("ArdourContextMenu");
 141         gain_astyle_menu.set_name ("ArdourContextMenu");
 142
 143         gain_adjustment.signal_value_changed().connect (mem_fun(*this, &GainMeterBase::gain_adjusted));
 144         peak_display.signal_button_release_event().connect (mem_fun(*this, &GainMeterBase::peak_button_release), false);
 145         gain_display.signal_key_press_event().connect (mem_fun(*this, &GainMeterBase::gain_key_press), false);
 146
 147         ResetAllPeakDisplays.connect (mem_fun(*this, &GainMeterBase::reset_peak_display));
 148         ResetGroupPeakDisplays.connect (mem_fun(*this, &GainMeterBase::reset_group_peak_display));
 149
 150         UI::instance()->theme_changed.connect (mem_fun(*this, &GainMeterBase::on_theme_changed));
 151         ColorsChanged.connect (bind(mem_fun (*this, &GainMeterBase::color_handler), false));
 152         DPIReset.connect (bind(mem_fun (*this, &GainMeterBase::color_handler), true));
 153 }
 154
 155 GainMeterBase::~GainMeterBase ()
 156 {
 157         delete meter_menu;
 158         delete level_meter;
 159 }
 160
 161 void
 162 GainMeterBase::set_io (boost::shared_ptr<IO> io)
 163 {
 164         connections.clear ();
 165
 166         _io = io;
 167
 168         level_meter->set_io (_io);
 169         gain_slider->set_controllable (_io->gain_control());
 170
 171         boost::shared_ptr<Route> r;
 172
 173         if ((r = boost::dynamic_pointer_cast<Route> (_io)) != 0) {
 174
 175                 if (!r->is_hidden()) {
 176
 177                         using namespace Menu_Helpers;
 178
 179                         gain_astate_menu.items().clear ();
 180
 181                         gain_astate_menu.items().push_back (MenuElem (_("Manual"),
 182                                                                       bind (mem_fun (*_io, &IO::set_parameter_automation_state),
 183                                                                             Evoral::Parameter(GainAutomation), (AutoState) Off)));
 184                         gain_astate_menu.items().push_back (MenuElem (_("Play"),
 185                                                                       bind (mem_fun (*_io, &IO::set_parameter_automation_state),
 186                                                                             Evoral::Parameter(GainAutomation), (AutoState) Play)));
 187                         gain_astate_menu.items().push_back (MenuElem (_("Write"),
 188                                                                       bind (mem_fun (*_io, &IO::set_parameter_automation_state),
 189                                                                             Evoral::Parameter(GainAutomation), (AutoState) Write)));
 190                         gain_astate_menu.items().push_back (MenuElem (_("Touch"),
 191                                                                       bind (mem_fun (*_io, &IO::set_parameter_automation_state),
 192                                                                             Evoral::Parameter(GainAutomation), (AutoState) Touch)));
 193
 194                         connections.push_back (gain_automation_style_button.signal_button_press_event().connect (mem_fun(*this, &GainMeterBase::gain_automation_style_button_event), false));
 195                         connections.push_back (gain_automation_state_button.signal_button_press_event().connect (mem_fun(*this, &GainMeterBase::gain_automation_state_button_event), false));
 196
 197                         connections.push_back (r->gain_control()->alist()->automation_state_changed.connect (mem_fun(*this, &GainMeter::gain_automation_state_changed)));
 198                         connections.push_back (r->gain_control()->alist()->automation_style_changed.connect (mem_fun(*this, &GainMeter::gain_automation_style_changed)));
 199
 200                         gain_automation_state_changed ();
 201                 }
 202         }
 203
 204         //cerr << "Connect " << this << " to gain change for " << _io->name() << endl;
 205
 206         connections.push_back (_io->gain_control()->Changed.connect (mem_fun(*this, &GainMeterBase::gain_changed)));
 207
 208         gain_changed ();
 209         show_gain ();
 210         update_gain_sensitive ();
 211 }
 212
 213 void
 214 GainMeterBase::hide_all_meters ()
 215 {
 216         level_meter->hide_meters();
 217 }
 218
 219 void
 220 GainMeter::hide_all_meters ()
 221 {
 222         bool remove_metric_area = false;
 223
 224         GainMeterBase::hide_all_meters ();
 225
 226         if (remove_metric_area) {
 227                 if (meter_metric_area.get_parent()) {
 228                         level_meter->remove (meter_metric_area);
 229                 }
 230         }
 231 }
 232
 233 void
 234 GainMeterBase::setup_meters (int len)
 235 {
 236         level_meter->setup_meters(len, 5);
 237 }
 238
 239 void
 240 GainMeter::setup_meters (int len)
 241 {
 242         if (!meter_metric_area.get_parent()) {
 243                 level_meter->pack_end (meter_metric_area, false, false);
 244                 meter_metric_area.show_all ();
 245         }
 246         GainMeterBase::setup_meters (len);
 247 }
 248
 249 bool
 250 GainMeterBase::gain_key_press (GdkEventKey* ev)
 251 {
 252         if (key_is_legal_for_numeric_entry (ev->keyval)) {
 253                 /* drop through to normal handling */
 254                 return false;
 255         }
 256         /* illegal key for gain entry */
 257         return true;
 258 }
 259
 260 bool
 261 GainMeterBase::peak_button_release (GdkEventButton* ev)
 262 {
 263         /* reset peak label */
 264
 265         if (ev->button == 1 && Keyboard::modifier_state_equals (ev->state, Keyboard::PrimaryModifier|Keyboard::TertiaryModifier)) {
 266                 ResetAllPeakDisplays ();
 267         } else if (ev->button == 1 && Keyboard::modifier_state_equals (ev->state, Keyboard::PrimaryModifier)) {
 268                 boost::shared_ptr<Route> r;
 269
 270                 if ((r = boost::dynamic_pointer_cast<Route> (_io)) != 0) {
 271                         ResetGroupPeakDisplays (r->mix_group());
 272                 }
 273         } else {
 274                 reset_peak_display ();
 275         }
 276
 277         return true;
 278 }
 279
 280 void
 281 GainMeterBase::reset_peak_display ()
 282 {
 283         boost::shared_ptr<Route> r;
 284
 285         if ((r = boost::dynamic_pointer_cast<Route> (_io)) != 0) {
 286                 r->peak_meter().reset_max();
 287         }
 288
 289         level_meter->clear_meters();
 290         max_peak = -INFINITY;
 291         peak_display.set_label (_("-Inf"));
 292         peak_display.set_name ("MixerStripPeakDisplay");
 293 }
 294
 295 void
 296 GainMeterBase::reset_group_peak_display (RouteGroup* group)
 297 {
 298         boost::shared_ptr<Route> r;
 299
 300         if ((r = boost::dynamic_pointer_cast<Route> (_io)) != 0) {
 301                 if (group == r->mix_group()) {
 302                         reset_peak_display ();
 303                 }
 304         }
 305 }
 306
 307 void
 308 GainMeterBase::popup_meter_menu (GdkEventButton *ev)
 309 {
 310         using namespace Menu_Helpers;
 311
 312         if (meter_menu == 0) {
 313                 meter_menu = new Gtk::Menu;
 314                 MenuList& items = meter_menu->items();
 315
 316                 items.push_back (MenuElem ("-inf .. +0dBFS"));
 317                 items.push_back (MenuElem ("-10dB .. +0dBFS"));
 318                 items.push_back (MenuElem ("-4 .. +0dBFS"));
 319                 items.push_back (SeparatorElem());
 320                 items.push_back (MenuElem ("-inf .. -2dBFS"));
 321                 items.push_back (MenuElem ("-10dB .. -2dBFS"));
 322                 items.push_back (MenuElem ("-4 .. -2dBFS"));
 323         }
 324
 325         meter_menu->popup (1, ev->time);
 326 }
 327
 328 bool
 329 GainMeterBase::gain_focused (GdkEventFocus* ev)
 330 {
 331         if (ev->in) {
 332                 gain_display.select_region (0, -1);
 333         } else {
 334                 gain_display.select_region (0, 0);
 335         }
 336         return false;
 337 }
 338
 339 void
 340 GainMeterBase::gain_activated ()
 341 {
 342         float f;
 343
 344         if (sscanf (gain_display.get_text().c_str(), "%f", &f) == 1) {
 345
 346                 /* clamp to displayable values */
 347
 348                 f = min (f, 6.0f);
 349
 350                 _io->gain_control()->set_value (dB_to_coefficient(f));
 351
 352                 if (gain_display.has_focus()) {
 353                         PublicEditor::instance().reset_focus();
 354                 }
 355         }
 356 }
 357
 358 void
 359 GainMeterBase::show_gain ()
 360 {
 361         char buf[32];
 362
 363         float v = gain_adjustment.get_value();
 364
 365         if (v == 0.0) {
 366                 strcpy (buf, _("-inf"));
 367         } else {
 368                 snprintf (buf, 32, "%.1f", coefficient_to_dB (slider_position_to_gain (v)));
 369         }
 370
 371         gain_display.set_text (buf);
 372 }
 373
 374 void
 375 GainMeterBase::gain_adjusted ()
 376 {
 377         //cerr << this << " for " << _io->name() << " GAIN ADJUSTED\n";
 378         if (!ignore_toggle) {
 379                 //cerr << "Set GC\n";
 380                 _io->gain_control()->set_value (slider_position_to_gain (gain_adjustment.get_value()));
 381                 //cerr << "Set GC OUT\n";
 382         }
 383         show_gain ();
 384 }
 385
 386 void
 387 GainMeterBase::effective_gain_display ()
 388 {
 389         gfloat value = gain_to_slider_position (_io->effective_gain());
 390
 391         //cerr << this << " for " << _io->name() << " EGAIN = " << value
 392         //              << " AGAIN = " << gain_adjustment.get_value () << endl;
 393         // stacktrace (cerr, 20);
 394
 395         if (gain_adjustment.get_value() != value) {
 396                 ignore_toggle = true;
 397                 gain_adjustment.set_value (value);
 398                 ignore_toggle = false;
 399         }
 400 }
 401
 402 void
 403 GainMeterBase::gain_changed ()
 404 {
 405         Gtkmm2ext::UI::instance()->call_slot (mem_fun(*this, &GainMeterBase::effective_gain_display));
 406 }
 407
 408 void
 409 GainMeterBase::set_meter_strip_name (const char * name)
 410 {
 411         meter_metric_area.set_name (name);
 412 }
 413
 414 void
 415 GainMeterBase::set_fader_name (const char * name)
 416 {
 417         gain_slider->set_name (name);
 418 }
 419
 420 void
 421 GainMeterBase::update_gain_sensitive ()
 422 {
 423         static_cast<Gtkmm2ext::SliderController*>(gain_slider)->set_sensitive (
 424                         !(_io->gain_control()->alist()->automation_state() & Play));
 425 }
 426
 427
 428 static MeterPoint
 429 next_meter_point (MeterPoint mp)
 430 {
 431         switch (mp) {
 432         case MeterInput:
 433                 return MeterPreFader;
 434                 break;
 435
 436         case MeterPreFader:
 437                 return MeterPostFader;
 438                 break;
 439
 440         case MeterPostFader:
 441                 return MeterInput;
 442                 break;
 443         }
 444         /*NOTREACHED*/
 445         return MeterInput;
 446 }
 447
 448 gint
 449 GainMeterBase::meter_press(GdkEventButton* ev)
 450 {
 451         boost::shared_ptr<Route> _route;
 452
 453         wait_for_release = false;
 454
 455         if ((_route = boost::dynamic_pointer_cast<Route>(_io)) == 0) {
 456                 return FALSE;
 457         }
 458
 459         if (!ignore_toggle) {
 460
 461                 if (Keyboard::is_context_menu_event (ev)) {
 462
 463                         // no menu at this time.
 464
 465                 } else {
 466
 467                         if (Keyboard::is_button2_event(ev)) {
 468
 469                                 // Primary-button2 click is the midi binding click
 470                                 // button2-click is "momentary"
 471
 472                                 if (!Keyboard::modifier_state_equals (ev->state, Keyboard::ModifierMask (Keyboard::PrimaryModifier))) {
 473                                         wait_for_release = true;
 474                                         old_meter_point = _route->meter_point ();
 475                                 }
 476                         }
 477
 478                         if (ev->button == 1 || Keyboard::is_button2_event (ev)) {
 479
 480                                 if (Keyboard::modifier_state_equals (ev->state, Keyboard::ModifierMask (Keyboard::PrimaryModifier|Keyboard::TertiaryModifier))) {
 481
 482                                         /* Primary+Tertiary-click applies change to all routes */
 483
 484                                         _session.begin_reversible_command (_("meter point change"));
 485                                         Session::GlobalMeteringStateCommand *cmd = new Session::GlobalMeteringStateCommand (_session, this);
 486                                         _session.foreach_route (this, &GainMeterBase::set_meter_point, next_meter_point (_route->meter_point()));
 487                                         cmd->mark();
 488                                         _session.add_command (cmd);
 489                                         _session.commit_reversible_command ();
 490
 491
 492                                 } else if (Keyboard::modifier_state_equals (ev->state, Keyboard::PrimaryModifier)) {
 493
 494                                         /* Primary-click: solo mix group.
 495                                            NOTE: Primary-button2 is MIDI learn.
 496                                         */
 497
 498                                         if (ev->button == 1) {
 499                                                 _session.begin_reversible_command (_("meter point change"));
 500                                                 Session::GlobalMeteringStateCommand *cmd = new Session::GlobalMeteringStateCommand (_session, this);
 501                                                 set_mix_group_meter_point (*_route, next_meter_point (_route->meter_point()));
 502                                                 cmd->mark();
 503                                                 _session.add_command (cmd);
 504                                                 _session.commit_reversible_command ();
 505                                         }
 506
 507                                 } else {
 508
 509                                         /* click: change just this route */
 510
 511                                         // XXX no undo yet
 512
 513                                         _route->set_meter_point (next_meter_point (_route->meter_point()), this);
 514                                 }
 515                         }
 516                 }
 517         }
 518
 519         return true;
 520
 521 }
 522
 523 gint
 524 GainMeterBase::meter_release(GdkEventButton* ev)
 525 {
 526         if(!ignore_toggle){
 527                 if (wait_for_release){
 528                         wait_for_release = false;
 529
 530                         boost::shared_ptr<Route> r;
 531
 532                         if ((r = boost::dynamic_pointer_cast<Route>(_io)) != 0) {
 533                                 set_meter_point (*r, old_meter_point);
 534                         }
 535                 }
 536         }
 537
 538         return true;
 539 }
 540
 541 void
 542 GainMeterBase::set_meter_point (Route& route, MeterPoint mp)
 543 {
 544         route.set_meter_point (mp, this);
 545 }
 546
 547 void
 548 GainMeterBase::set_mix_group_meter_point (Route& route, MeterPoint mp)
 549 {
 550         RouteGroup* mix_group;
 551
 552         if((mix_group = route.mix_group()) != 0){
 553                 mix_group->apply (&Route::set_meter_point, mp, this);
 554         } else {
 555                 route.set_meter_point (mp, this);
 556         }
 557 }
 558
 559 void
 560 GainMeterBase::meter_point_clicked ()
 561 {
 562         boost::shared_ptr<Route> r;
 563
 564         if ((r = boost::dynamic_pointer_cast<Route> (_io)) != 0) {
 565                 /* WHAT? */
 566         }
 567 }
 568
 569 gint
 570 GainMeterBase::start_gain_touch (GdkEventButton* ev)
 571 {
 572         _io->gain_control()->alist()->start_touch ();
 573         return FALSE;
 574 }
 575
 576 gint
 577 GainMeterBase::end_gain_touch (GdkEventButton* ev)
 578 {
 579         _io->gain_control()->alist()->stop_touch ();
 580         return FALSE;
 581 }
 582
 583 gint
 584 GainMeterBase::gain_automation_state_button_event (GdkEventButton *ev)
 585 {
 586         if (ev->type == GDK_BUTTON_RELEASE) {
 587                 return TRUE;
 588         }
 589
 590         switch (ev->button) {
 591                 case 1:
 592                         gain_astate_menu.popup (1, ev->time);
 593                         break;
 594                 default:
 595                         break;
 596         }
 597
 598         return TRUE;
 599 }
 600
 601 gint
 602 GainMeterBase::gain_automation_style_button_event (GdkEventButton *ev)
 603 {
 604         if (ev->type == GDK_BUTTON_RELEASE) {
 605                 return TRUE;
 606         }
 607
 608         switch (ev->button) {
 609         case 1:
 610                 gain_astyle_menu.popup (1, ev->time);
 611                 break;
 612         default:
 613                 break;
 614         }
 615         return TRUE;
 616 }
 617
 618 string
 619 GainMeterBase::astate_string (AutoState state)
 620 {
 621         return _astate_string (state, false);
 622 }
 623
 624 string
 625 GainMeterBase::short_astate_string (AutoState state)
 626 {
 627         return _astate_string (state, true);
 628 }
 629
 630 string
 631 GainMeterBase::_astate_string (AutoState state, bool shrt)
 632 {
 633         string sstr;
 634
 635         switch (state) {
 636         case Off:
 637                 sstr = (shrt ? "M" : _("M"));
 638                 break;
 639         case Play:
 640                 sstr = (shrt ? "P" : _("P"));
 641                 break;
 642         case Touch:
 643                 sstr = (shrt ? "T" : _("T"));
 644                 break;
 645         case Write:
 646                 sstr = (shrt ? "W" : _("W"));
 647                 break;
 648         }
 649
 650         return sstr;
 651 }
 652
 653 string
 654 GainMeterBase::astyle_string (AutoStyle style)
 655 {
 656         return _astyle_string (style, false);
 657 }
 658
 659 string
 660 GainMeterBase::short_astyle_string (AutoStyle style)
 661 {
 662         return _astyle_string (style, true);
 663 }
 664
 665 string
 666 GainMeterBase::_astyle_string (AutoStyle style, bool shrt)
 667 {
 668         if (style & Trim) {
 669                 return _("Trim");
 670         } else {
 671                 /* XXX it might different in different languages */
 672
 673                 return (shrt ? _("Abs") : _("Abs"));
 674         }
 675 }
 676
 677 void
 678 GainMeterBase::gain_automation_style_changed ()
 679 {
 680         switch (_width) {
 681         case Wide:
 682                 gain_automation_style_button.set_label (astyle_string(_io->gain_control()->alist()->automation_style()));
 683                 break;
 684         case Narrow:
 685                 gain_automation_style_button.set_label  (short_astyle_string(_io->gain_control()->alist()->automation_style()));
 686                 break;
 687         }
 688 }
 689
 690 void
 691 GainMeterBase::gain_automation_state_changed ()
 692 {
 693         ENSURE_GUI_THREAD(mem_fun(*this, &GainMeterBase::gain_automation_state_changed));
 694
 695         bool x;
 696
 697         switch (_width) {
 698         case Wide:
 699                 gain_automation_state_button.set_label (astate_string(_io->gain_control()->alist()->automation_state()));
 700                 break;
 701         case Narrow:
 702                 gain_automation_state_button.set_label (short_astate_string(_io->gain_control()->alist()->automation_state()));
 703                 break;
 704         }
 705
 706         x = (_io->gain_control()->alist()->automation_state() != Off);
 707
 708         if (gain_automation_state_button.get_active() != x) {
 709                 ignore_toggle = true;
 710                 gain_automation_state_button.set_active (x);
 711                 ignore_toggle = false;
 712         }
 713
 714         update_gain_sensitive ();
 715
 716         /* start watching automation so that things move */
 717
 718         gain_watching.disconnect();
 719
 720         if (x) {
 721                 gain_watching = ARDOUR_UI::RapidScreenUpdate.connect (mem_fun (*this, &GainMeterBase::effective_gain_display));
 722         }
 723 }
 724
 725 void
 726 GainMeterBase::update_meters()
 727 {
 728         char buf[32];
 729         float mpeak = level_meter->update_meters();
 730
 731         if (mpeak > max_peak) {
 732                 max_peak = mpeak;
 733                 if (mpeak <= -200.0f) {
 734                         peak_display.set_label (_("-inf"));
 735                 } else {
 736                         snprintf (buf, sizeof(buf), "%.1f", mpeak);
 737                         peak_display.set_label (buf);
 738                 }
 739
 740                 if (mpeak >= 0.0f) {
 741                         peak_display.set_name ("MixerStripPeakDisplayPeak");
 742                 }
 743         }
 744 }
 745
 746 void GainMeterBase::color_handler(bool dpi)
 747 {
 748         color_changed = true;
 749         dpi_changed = (dpi) ? true : false;
 750         setup_meters();
 751 }
 752
 753 void
 754 GainMeterBase::set_width (Width w, int len)
 755 {
 756         _width = w;
 757         level_meter->setup_meters (len);
 758 }
 759
 760
 761 void
 762 GainMeterBase::on_theme_changed()
 763 {
 764         style_changed = true;
 765 }
 766
 767 GainMeter::GainMeter (Session& s)
 768         : GainMeterBase (s, slider, false)
 769 {
 770         gain_display_box.set_homogeneous (true);
 771         gain_display_box.set_spacing (2);
 772         gain_display_box.pack_start (gain_display, true, true);
 773
 774         meter_metric_area.set_name ("AudioTrackMetrics");
 775         set_size_request_to_display_given_text (meter_metric_area, "-50", 0, 0);
 776
 777         gain_automation_style_button.set_name ("MixerAutomationModeButton");
 778         gain_automation_state_button.set_name ("MixerAutomationPlaybackButton");
 779
 780         ARDOUR_UI::instance()->tooltips().set_tip (gain_automation_state_button, _("Fader automation mode"));
 781         ARDOUR_UI::instance()->tooltips().set_tip (gain_automation_style_button, _("Fader automation type"));
 782
 783         gain_automation_style_button.unset_flags (Gtk::CAN_FOCUS);
 784         gain_automation_state_button.unset_flags (Gtk::CAN_FOCUS);
 785
 786         gain_automation_state_button.set_size_request(15, 15);
 787         gain_automation_style_button.set_size_request(15, 15);
 788
 789         HBox* fader_centering_box = manage (new HBox);
 790         fader_centering_box->pack_start (*gain_slider, true, false);
 791
 792         fader_vbox = manage (new Gtk::VBox());
 793         fader_vbox->set_spacing (0);
 794         fader_vbox->pack_start (*fader_centering_box, false, false, 0);
 795
 796         hbox.set_spacing (2);
 797         hbox.pack_start (*fader_vbox, true, true);
 798
 799         set_spacing (2);
 800
 801         pack_start (gain_display_box, Gtk::PACK_SHRINK);
 802         pack_start (hbox, Gtk::PACK_SHRINK);
 803
 804         meter_metric_area.signal_expose_event().connect (mem_fun(*this, &GainMeter::meter_metrics_expose));
 805 }
 806
 807 void
 808 GainMeter::set_io (boost::shared_ptr<IO> io)
 809 {
 810         if (level_meter->get_parent()) {
 811                 hbox.remove (*level_meter);
 812         }
 813
 814         if (peak_display.get_parent()) {
 815                 gain_display_box.remove (peak_display);
 816         }
 817
 818         if (gain_automation_state_button.get_parent()) {
 819                 fader_vbox->remove (gain_automation_state_button);
 820         }
 821
 822         GainMeterBase::set_io (io);
 823
 824         boost::shared_ptr<Route> r;
 825
 826         if ((r = boost::dynamic_pointer_cast<Route> (_io)) != 0) {
 827
 828                 /*
 829                    if we have a non-hidden route (ie. we're not the click or the auditioner),
 830                    pack some route-dependent stuff.
 831                 */
 832
 833                 gain_display_box.pack_end (peak_display, true, true);
 834                 hbox.pack_end (*level_meter, true, true);
 835
 836                 if (!r->is_hidden()) {
 837                         fader_vbox->pack_start (gain_automation_state_button, false, false, 0);
 838                 }
 839         }
 840 }
 841
 842 int
 843 GainMeter::get_gm_width ()
 844 {
 845         Gtk::Requisition sz;
 846         hbox.size_request (sz);
 847         return sz.width;
 848 }
 849
 850 Glib::RefPtr<Gdk::Pixmap>
 851 GainMeter::render_metrics (Gtk::Widget& w)
 852 {
 853         Glib::RefPtr<Gdk::Window> win (w.get_window());
 854         Glib::RefPtr<Gdk::GC> fg_gc (w.get_style()->get_fg_gc (Gtk::STATE_NORMAL));
 855         Glib::RefPtr<Gdk::GC> bg_gc (w.get_style()->get_bg_gc (Gtk::STATE_NORMAL));
 856         gint width, height;
 857         int  db_points[] = { -50, -40, -20, -30, -10, -3, 0, 4 };
 858         char buf[32];
 859
 860         win->get_size (width, height);
 861
 862         Glib::RefPtr<Gdk::Pixmap> pixmap = Gdk::Pixmap::create (win, width, height);
 863
 864         metric_pixmaps[w.get_name()] = pixmap;
 865
 866         pixmap->draw_rectangle (bg_gc, true, 0, 0, width, height);
 867
 868         Glib::RefPtr<Pango::Layout> layout = w.create_pango_layout("");
 869
 870         for (uint32_t i = 0; i < sizeof (db_points)/sizeof (db_points[0]); ++i) {
 871
 872                 float fraction = log_meter (db_points[i]);
 873                 gint pos = height - (gint) floor (height * fraction);
 874
 875                 snprintf (buf, sizeof (buf), "%d", abs (db_points[i]));
 876
 877                 layout->set_text (buf);
 878
 879                 /* we want logical extents, not ink extents here */
 880
 881                 int width, height;
 882                 layout->get_pixel_size (width, height);
 883
 884                 pixmap->draw_line (fg_gc, 0, pos, 4, pos);
 885                 pixmap->draw_layout (fg_gc, 6, pos - (height/2), layout);
 886         }
 887
 888         return pixmap;
 889 }
 890
 891 gint
 892 GainMeter::meter_metrics_expose (GdkEventExpose *ev)
 893 {
 894         static Glib::RefPtr<Gtk::Style> meter_style;
 895         if (style_changed) {
 896                 meter_style = meter_metric_area.get_style();
 897         }
 898         Glib::RefPtr<Gdk::Window> win (meter_metric_area.get_window());
 899         Glib::RefPtr<Gdk::GC> bg_gc (meter_style->get_bg_gc (Gtk::STATE_INSENSITIVE));
 900         GdkRectangle base_rect;
 901         GdkRectangle draw_rect;
 902         gint width, height;
 903
 904         win->get_size (width, height);
 905
 906         base_rect.width = width;
 907         base_rect.height = height;
 908         base_rect.x = 0;
 909         base_rect.y = 0;
 910
 911         Glib::RefPtr<Gdk::Pixmap> pixmap;
 912         std::map<string,Glib::RefPtr<Gdk::Pixmap> >::iterator i = metric_pixmaps.find (meter_metric_area.get_name());
 913
 914         if (i == metric_pixmaps.end() || style_changed || dpi_changed) {
 915                 pixmap = render_metrics (meter_metric_area);
 916         } else {
 917                 pixmap = i->second;
 918         }
 919
 920         gdk_rectangle_intersect (&ev->area, &base_rect, &draw_rect);
 921         win->draw_drawable (bg_gc, pixmap, draw_rect.x, draw_rect.y, draw_rect.x, draw_rect.y, draw_rect.width, draw_rect.height);
 922         style_changed = false;
 923         return true;
 924 }
 925
 926 boost::shared_ptr<PBD::Controllable>
 927 GainMeterBase::get_controllable()
 928 {
 929         return _io->gain_control();
 930 }
 931
 932