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/amp.h"
  23 #include "ardour/io.h"
  24 #include "ardour/route.h"
  25 #include "ardour/route_group.h"
  26 #include "ardour/session.h"
  27 #include "ardour/session_route.h"
  28 #include "ardour/dB.h"
  29
  30 #include <gtkmm/style.h>
  31 #include <gdkmm/color.h>
  32 #include <gtkmm2ext/utils.h>
  33 #include <gtkmm2ext/fastmeter.h>
  34 #include <gtkmm2ext/stop_signal.h>
  35 #include <gtkmm2ext/barcontroller.h>
  36 #include <gtkmm2ext/gtk_ui.h>
  37 #include "midi++/manager.h"
  38 #include "pbd/fastlog.h"
  39 #include "pbd/stacktrace.h"
  40
  41 #include "ardour_ui.h"
  42 #include "gain_meter.h"
  43 #include "utils.h"
  44 #include "logmeter.h"
  45 #include "gui_thread.h"
  46 #include "keyboard.h"
  47 #include "public_editor.h"
  48
  49 #include "ardour/session.h"
  50 #include "ardour/route.h"
  51 #include "ardour/meter.h"
  52
  53 #include "i18n.h"
  54
  55 using namespace ARDOUR;
  56 using namespace PBD;
  57 using namespace Gtkmm2ext;
  58 using namespace Gtk;
  59 using namespace sigc;
  60 using namespace std;
  61
  62 sigc::signal<void> GainMeterBase::ResetAllPeakDisplays;
  63 sigc::signal<void,RouteGroup*> GainMeterBase::ResetGroupPeakDisplays;
  64
  65 map<string,Glib::RefPtr<Gdk::Pixmap> > GainMeter::metric_pixmaps;
  66 Glib::RefPtr<Gdk::Pixbuf> GainMeter::slider;
  67
  68
  69 void
  70 GainMeter::setup_slider_pix ()
  71 {
  72         if ((slider = ::get_icon ("fader_belt")) == 0) {
  73                 throw failed_constructor();
  74         }
  75 }
  76
  77 GainMeterBase::GainMeterBase (Session& s,
  78                               const Glib::RefPtr<Gdk::Pixbuf>& pix,
  79                               bool horizontal)
  80         : _session (s)
  81           // 0.781787 is the value needed for gain to be set to 0.
  82         , gain_adjustment (0.781787, 0.0, 1.0, 0.01, 0.1)
  83         , gain_automation_style_button ("")
  84         , gain_automation_state_button ("")
  85         , dpi_changed (false)
  86         , _is_midi (false)
  87
  88 {
  89         using namespace Menu_Helpers;
  90
  91         ignore_toggle = false;
  92         meter_menu = 0;
  93         next_release_selects = false;
  94         style_changed = true;
  95         _width = Wide;
  96
  97         if (horizontal) {
  98                 gain_slider = manage (new HSliderController (pix,
  99                                                              &gain_adjustment,
 100                                                              false));
 101         } else {
 102                 gain_slider = manage (new VSliderController (pix,
 103                                                              &gain_adjustment,
 104                                                              false));
 105         }
 106
 107         level_meter = new LevelMeter(_session);
 108
 109         gain_slider->signal_button_press_event().connect (mem_fun(*this, &GainMeter::start_gain_touch));
 110         gain_slider->signal_button_release_event().connect (mem_fun(*this, &GainMeter::end_gain_touch));
 111         gain_slider->set_name ("GainFader");
 112
 113         gain_display.set_name ("MixerStripGainDisplay");
 114         gain_display.set_has_frame (false);
 115         set_size_request_to_display_given_text (gain_display, "-80.g", 2, 6); /* note the descender */
 116         gain_display.signal_activate().connect (mem_fun (*this, &GainMeter::gain_activated));
 117         gain_display.signal_focus_in_event().connect (mem_fun (*this, &GainMeter::gain_focused), false);
 118         gain_display.signal_focus_out_event().connect (mem_fun (*this, &GainMeter::gain_focused), false);
 119
 120         peak_display.set_name ("MixerStripPeakDisplay");
 121 //      peak_display.set_has_frame (false);
 122 //      peak_display.set_editable (false);
 123         set_size_request_to_display_given_text  (peak_display, "-80.g", 2, 6); /* note the descender */
 124         max_peak = minus_infinity();
 125         peak_display.set_label (_("-inf"));
 126         peak_display.unset_flags (Gtk::CAN_FOCUS);
 127
 128         gain_automation_style_button.set_name ("MixerAutomationModeButton");
 129         gain_automation_state_button.set_name ("MixerAutomationPlaybackButton");
 130
 131         ARDOUR_UI::instance()->tooltips().set_tip (gain_automation_state_button, _("Fader automation mode"));
 132         ARDOUR_UI::instance()->tooltips().set_tip (gain_automation_style_button, _("Fader automation type"));
 133
 134         gain_automation_style_button.unset_flags (Gtk::CAN_FOCUS);
 135         gain_automation_state_button.unset_flags (Gtk::CAN_FOCUS);
 136
 137         gain_automation_state_button.set_size_request(15, 15);
 138         gain_automation_style_button.set_size_request(15, 15);
 139
 140         gain_astyle_menu.items().push_back (MenuElem (_("Trim")));
 141         gain_astyle_menu.items().push_back (MenuElem (_("Abs")));
 142
 143         gain_astate_menu.set_name ("ArdourContextMenu");
 144         gain_astyle_menu.set_name ("ArdourContextMenu");
 145
 146         gain_adjustment.signal_value_changed().connect (mem_fun(*this, &GainMeterBase::gain_adjusted));
 147         peak_display.signal_button_release_event().connect (mem_fun(*this, &GainMeterBase::peak_button_release), false);
 148         gain_display.signal_key_press_event().connect (mem_fun(*this, &GainMeterBase::gain_key_press), false);
 149
 150         ResetAllPeakDisplays.connect (mem_fun(*this, &GainMeterBase::reset_peak_display));
 151         ResetGroupPeakDisplays.connect (mem_fun(*this, &GainMeterBase::reset_group_peak_display));
 152
 153         UI::instance()->theme_changed.connect (mem_fun(*this, &GainMeterBase::on_theme_changed));
 154         ColorsChanged.connect (bind(mem_fun (*this, &GainMeterBase::color_handler), false));
 155         DPIReset.connect (bind(mem_fun (*this, &GainMeterBase::color_handler), true));
 156 }
 157
 158 GainMeterBase::~GainMeterBase ()
 159 {
 160         delete meter_menu;
 161         delete level_meter;
 162 }
 163
 164 void
 165 GainMeterBase::set_controls (boost::shared_ptr<Route> r,
 166                              boost::shared_ptr<PeakMeter> pm,
 167                              boost::shared_ptr<Amp> amp)
 168 {
 169         connections.clear ();
 170
 171         if (!pm && !amp) {
 172                 level_meter->set_meter (0);
 173                 gain_slider->set_controllable (boost::shared_ptr<PBD::Controllable>());
 174                 _meter.reset ();
 175                 _amp.reset ();
 176                 _route.reset ();
 177                 return;
 178         }
 179
 180         _meter = pm;
 181         _amp = amp;
 182         _route = r;
 183
 184         level_meter->set_meter (pm.get());
 185         gain_slider->set_controllable (amp->gain_control());
 186
 187         if (!_route || _route->output()->n_ports().n_midi() == 0) {
 188                 _is_midi = false;
 189                 gain_adjustment.set_lower (0.0);
 190                 gain_adjustment.set_upper (1.0);
 191                 gain_adjustment.set_step_increment (0.01);
 192                 gain_adjustment.set_page_increment (0.1);
 193         } else {
 194                 _is_midi = true;
 195                 gain_adjustment.set_lower (0.0);
 196                 gain_adjustment.set_upper (2.0);
 197                 gain_adjustment.set_step_increment (0.05);
 198                 gain_adjustment.set_page_increment (0.1);
 199         }
 200
 201         if (!_route || !_route->is_hidden()) {
 202
 203                 using namespace Menu_Helpers;
 204
 205                 gain_astate_menu.items().clear ();
 206
 207                 gain_astate_menu.items().push_back (MenuElem (_("Manual"),
 208                                                               bind (mem_fun (*(amp.get()), &Automatable::set_parameter_automation_state),
 209                                                                     Evoral::Parameter(GainAutomation), (AutoState) Off)));
 210                 gain_astate_menu.items().push_back (MenuElem (_("Play"),
 211                                                               bind (mem_fun (*(amp.get()), &Automatable::set_parameter_automation_state),
 212                                                                     Evoral::Parameter(GainAutomation), (AutoState) Play)));
 213                 gain_astate_menu.items().push_back (MenuElem (_("Write"),
 214                                                               bind (mem_fun (*(amp.get()), &Automatable::set_parameter_automation_state),
 215                                                                     Evoral::Parameter(GainAutomation), (AutoState) Write)));
 216                 gain_astate_menu.items().push_back (MenuElem (_("Touch"),
 217                                                               bind (mem_fun (*(amp.get()), &Automatable::set_parameter_automation_state),
 218                                                                     Evoral::Parameter(GainAutomation), (AutoState) Touch)));
 219
 220                 connections.push_back (gain_automation_style_button.signal_button_press_event().connect (mem_fun(*this, &GainMeterBase::gain_automation_style_button_event), false));
 221                 connections.push_back (gain_automation_state_button.signal_button_press_event().connect (mem_fun(*this, &GainMeterBase::gain_automation_state_button_event), false));
 222
 223                 boost::shared_ptr<AutomationControl> gc = amp->gain_control();
 224
 225                 connections.push_back (gc->alist()->automation_state_changed.connect (mem_fun(*this, &GainMeter::gain_automation_state_changed)));
 226                 connections.push_back (gc->alist()->automation_style_changed.connect (mem_fun(*this, &GainMeter::gain_automation_style_changed)));
 227
 228                 gain_automation_state_changed ();
 229         }
 230
 231         connections.push_back (amp->gain_control()->Changed.connect (mem_fun (*this, &GainMeterBase::gain_changed)));
 232
 233         gain_changed ();
 234         show_gain ();
 235         update_gain_sensitive ();
 236 }
 237
 238 void
 239 GainMeterBase::hide_all_meters ()
 240 {
 241         level_meter->hide_meters();
 242 }
 243
 244 void
 245 GainMeter::hide_all_meters ()
 246 {
 247         bool remove_metric_area = false;
 248
 249         GainMeterBase::hide_all_meters ();
 250
 251         if (remove_metric_area) {
 252                 if (meter_metric_area.get_parent()) {
 253                         level_meter->remove (meter_metric_area);
 254                 }
 255         }
 256 }
 257
 258 void
 259 GainMeterBase::setup_meters (int len)
 260 {
 261         level_meter->setup_meters(len, 5);
 262 }
 263
 264 void
 265 GainMeter::setup_meters (int len)
 266 {
 267         if (!meter_metric_area.get_parent()) {
 268                 level_meter->pack_end (meter_metric_area, false, false);
 269                 meter_metric_area.show_all ();
 270         }
 271         GainMeterBase::setup_meters (len);
 272 }
 273
 274 bool
 275 GainMeterBase::gain_key_press (GdkEventKey* ev)
 276 {
 277         if (key_is_legal_for_numeric_entry (ev->keyval)) {
 278                 /* drop through to normal handling */
 279                 return false;
 280         }
 281         /* illegal key for gain entry */
 282         return true;
 283 }
 284
 285 bool
 286 GainMeterBase::peak_button_release (GdkEventButton* ev)
 287 {
 288         /* reset peak label */
 289
 290         if (ev->button == 1 && Keyboard::modifier_state_equals (ev->state, Keyboard::PrimaryModifier|Keyboard::TertiaryModifier)) {
 291                 ResetAllPeakDisplays ();
 292         } else if (ev->button == 1 && Keyboard::modifier_state_equals (ev->state, Keyboard::PrimaryModifier)) {
 293                 if (_route) {
 294                         ResetGroupPeakDisplays (_route->route_group());
 295                 }
 296         } else {
 297                 reset_peak_display ();
 298         }
 299
 300         return true;
 301 }
 302
 303 void
 304 GainMeterBase::reset_peak_display ()
 305 {
 306         _meter->reset_max();
 307         level_meter->clear_meters();
 308         max_peak = -INFINITY;
 309         peak_display.set_label (_("-Inf"));
 310         peak_display.set_name ("MixerStripPeakDisplay");
 311 }
 312
 313 void
 314 GainMeterBase::reset_group_peak_display (RouteGroup* group)
 315 {
 316         if (_route && group == _route->route_group()) {
 317                 reset_peak_display ();
 318                 }
 319 }
 320
 321 void
 322 GainMeterBase::popup_meter_menu (GdkEventButton *ev)
 323 {
 324         using namespace Menu_Helpers;
 325
 326         if (meter_menu == 0) {
 327                 meter_menu = new Gtk::Menu;
 328                 MenuList& items = meter_menu->items();
 329
 330                 items.push_back (MenuElem ("-inf .. +0dBFS"));
 331                 items.push_back (MenuElem ("-10dB .. +0dBFS"));
 332                 items.push_back (MenuElem ("-4 .. +0dBFS"));
 333                 items.push_back (SeparatorElem());
 334                 items.push_back (MenuElem ("-inf .. -2dBFS"));
 335                 items.push_back (MenuElem ("-10dB .. -2dBFS"));
 336                 items.push_back (MenuElem ("-4 .. -2dBFS"));
 337         }
 338
 339         meter_menu->popup (1, ev->time);
 340 }
 341
 342 bool
 343 GainMeterBase::gain_focused (GdkEventFocus* ev)
 344 {
 345         if (ev->in) {
 346                 gain_display.select_region (0, -1);
 347         } else {
 348                 gain_display.select_region (0, 0);
 349         }
 350         return false;
 351 }
 352
 353 void
 354 GainMeterBase::gain_activated ()
 355 {
 356         float f;
 357
 358         if (sscanf (gain_display.get_text().c_str(), "%f", &f) == 1) {
 359
 360                 /* clamp to displayable values */
 361
 362                 f = min (f, 6.0f);
 363
 364                 _amp->set_gain (dB_to_coefficient(f), this);
 365
 366                 if (gain_display.has_focus()) {
 367                         PublicEditor::instance().reset_focus();
 368                 }
 369         }
 370 }
 371
 372 void
 373 GainMeterBase::show_gain ()
 374 {
 375         char buf[32];
 376
 377         float v = gain_adjustment.get_value();
 378
 379         if (!_is_midi) {
 380                 if (v == 0.0) {
 381                         strcpy (buf, _("-inf"));
 382                 } else {
 383                         snprintf (buf, sizeof (buf), "%.1f", accurate_coefficient_to_dB (slider_position_to_gain (v)));
 384                 }
 385         } else {
 386                 snprintf (buf, sizeof (buf), "%.1f", v);
 387         }
 388
 389         gain_display.set_text (buf);
 390 }
 391
 392 void
 393 GainMeterBase::gain_adjusted ()
 394 {
 395         if (!ignore_toggle) {
 396                 if (_route) {
 397                         if (_route->amp() == _amp) {
 398                                 if (_is_midi) {
 399                                         _route->set_gain (gain_adjustment.get_value(), this);
 400                                 } else {
 401                                         _route->set_gain (slider_position_to_gain (gain_adjustment.get_value()), this);
 402                                 }
 403                         } else {
 404                                 _amp->set_gain (slider_position_to_gain (gain_adjustment.get_value()), this);
 405                         }
 406                 }
 407         }
 408
 409         show_gain ();
 410 }
 411
 412 void
 413 GainMeterBase::effective_gain_display ()
 414 {
 415         gfloat value;
 416
 417         if (!_route || _route->output()->n_ports().n_midi() == 0) {
 418                 value = gain_to_slider_position (_amp->gain());
 419         } else {
 420                 value = _amp->gain ();
 421         }
 422
 423         //cerr << this << " for " << _io->name() << " EGAIN = " << value
 424         //              << " AGAIN = " << gain_adjustment.get_value () << endl;
 425         // stacktrace (cerr, 20);
 426
 427         if (gain_adjustment.get_value() != value) {
 428                 ignore_toggle = true;
 429                 gain_adjustment.set_value (value);
 430                 ignore_toggle = false;
 431         }
 432 }
 433
 434 void
 435 GainMeterBase::gain_changed ()
 436 {
 437         Gtkmm2ext::UI::instance()->call_slot (mem_fun(*this, &GainMeterBase::effective_gain_display));
 438 }
 439
 440 void
 441 GainMeterBase::set_meter_strip_name (const char * name)
 442 {
 443         meter_metric_area.set_name (name);
 444 }
 445
 446 void
 447 GainMeterBase::set_fader_name (const char * name)
 448 {
 449         gain_slider->set_name (name);
 450 }
 451
 452 void
 453 GainMeterBase::update_gain_sensitive ()
 454 {
 455         bool x = !(_amp->gain_control()->alist()->automation_state() & Play);
 456         static_cast<Gtkmm2ext::SliderController*>(gain_slider)->set_sensitive (x);
 457 }
 458
 459 static MeterPoint
 460 next_meter_point (MeterPoint mp)
 461 {
 462         switch (mp) {
 463         case MeterInput:
 464                 return MeterPreFader;
 465                 break;
 466
 467         case MeterPreFader:
 468                 return MeterPostFader;
 469                 break;
 470
 471         case MeterPostFader:
 472                 return MeterInput;
 473                 break;
 474         }
 475         /*NOTREACHED*/
 476         return MeterInput;
 477 }
 478
 479 gint
 480 GainMeterBase::meter_press(GdkEventButton* ev)
 481 {
 482         wait_for_release = false;
 483
 484         if (!_route) {
 485                 return FALSE;
 486         }
 487
 488         if (!ignore_toggle) {
 489
 490                 if (Keyboard::is_context_menu_event (ev)) {
 491
 492                         // no menu at this time.
 493
 494                 } else {
 495
 496                         if (Keyboard::is_button2_event(ev)) {
 497
 498                                 // Primary-button2 click is the midi binding click
 499                                 // button2-click is "momentary"
 500
 501                                 if (!Keyboard::modifier_state_equals (ev->state, Keyboard::ModifierMask (Keyboard::PrimaryModifier))) {
 502                                         wait_for_release = true;
 503                                         old_meter_point = _route->meter_point ();
 504                                 }
 505                         }
 506
 507                         if (_route && (ev->button == 1 || Keyboard::is_button2_event (ev))) {
 508
 509                                 if (Keyboard::modifier_state_equals (ev->state, Keyboard::ModifierMask (Keyboard::PrimaryModifier|Keyboard::TertiaryModifier))) {
 510
 511                                         /* Primary+Tertiary-click applies change to all routes */
 512
 513                                         _session.begin_reversible_command (_("meter point change"));
 514                                         Session::GlobalMeteringStateCommand *cmd = new Session::GlobalMeteringStateCommand (_session, this);
 515                                         _session.foreach_route (this, &GainMeterBase::set_meter_point, next_meter_point (_route->meter_point()));
 516                                         cmd->mark();
 517                                         _session.add_command (cmd);
 518                                         _session.commit_reversible_command ();
 519
 520
 521                                 } else if (Keyboard::modifier_state_equals (ev->state, Keyboard::PrimaryModifier)) {
 522
 523                                         /* Primary-click: solo mix group.
 524                                            NOTE: Primary-button2 is MIDI learn.
 525                                         */
 526
 527                                         if (ev->button == 1) {
 528                                                 _session.begin_reversible_command (_("meter point change"));
 529                                                 Session::GlobalMeteringStateCommand *cmd = new Session::GlobalMeteringStateCommand (_session, this);
 530                                                 set_mix_group_meter_point (*_route, next_meter_point (_route->meter_point()));
 531                                                 cmd->mark();
 532                                                 _session.add_command (cmd);
 533                                                 _session.commit_reversible_command ();
 534                                         }
 535
 536                                 } else {
 537
 538                                         /* click: change just this route */
 539
 540                                         // XXX no undo yet
 541
 542                                         _route->set_meter_point (next_meter_point (_route->meter_point()), this);
 543                                 }
 544                         }
 545                 }
 546         }
 547
 548         return true;
 549
 550 }
 551
 552 gint
 553 GainMeterBase::meter_release(GdkEventButton*)
 554 {
 555         if(!ignore_toggle){
 556                 if (wait_for_release){
 557                         wait_for_release = false;
 558
 559                         if (_route) {
 560                                 set_meter_point (*_route, old_meter_point);
 561                         }
 562                 }
 563         }
 564
 565         return true;
 566 }
 567
 568 void
 569 GainMeterBase::set_meter_point (Route& route, MeterPoint mp)
 570 {
 571         route.set_meter_point (mp, this);
 572 }
 573
 574 void
 575 GainMeterBase::set_mix_group_meter_point (Route& route, MeterPoint mp)
 576 {
 577         RouteGroup* mix_group;
 578
 579         if((mix_group = route.route_group()) != 0){
 580                 mix_group->apply (&Route::set_meter_point, mp, this);
 581         } else {
 582                 route.set_meter_point (mp, this);
 583         }
 584 }
 585
 586 void
 587 GainMeterBase::meter_point_clicked ()
 588 {
 589         if (_route) {
 590                 /* WHAT? */
 591         }
 592 }
 593
 594 gint
 595 GainMeterBase::start_gain_touch (GdkEventButton*)
 596 {
 597         _amp->gain_control()->start_touch ();
 598         return FALSE;
 599 }
 600
 601 gint
 602 GainMeterBase::end_gain_touch (GdkEventButton*)
 603 {
 604         _amp->gain_control()->stop_touch ();
 605         return FALSE;
 606 }
 607
 608 gint
 609 GainMeterBase::gain_automation_state_button_event (GdkEventButton *ev)
 610 {
 611         if (ev->type == GDK_BUTTON_RELEASE) {
 612                 return TRUE;
 613         }
 614
 615         switch (ev->button) {
 616                 case 1:
 617                         gain_astate_menu.popup (1, ev->time);
 618                         break;
 619                 default:
 620                         break;
 621         }
 622
 623         return TRUE;
 624 }
 625
 626 gint
 627 GainMeterBase::gain_automation_style_button_event (GdkEventButton *ev)
 628 {
 629         if (ev->type == GDK_BUTTON_RELEASE) {
 630                 return TRUE;
 631         }
 632
 633         switch (ev->button) {
 634         case 1:
 635                 gain_astyle_menu.popup (1, ev->time);
 636                 break;
 637         default:
 638                 break;
 639         }
 640         return TRUE;
 641 }
 642
 643 string
 644 GainMeterBase::astate_string (AutoState state)
 645 {
 646         return _astate_string (state, false);
 647 }
 648
 649 string
 650 GainMeterBase::short_astate_string (AutoState state)
 651 {
 652         return _astate_string (state, true);
 653 }
 654
 655 string
 656 GainMeterBase::_astate_string (AutoState state, bool shrt)
 657 {
 658         string sstr;
 659
 660         switch (state) {
 661         case Off:
 662                 sstr = (shrt ? "M" : _("M"));
 663                 break;
 664         case Play:
 665                 sstr = (shrt ? "P" : _("P"));
 666                 break;
 667         case Touch:
 668                 sstr = (shrt ? "T" : _("T"));
 669                 break;
 670         case Write:
 671                 sstr = (shrt ? "W" : _("W"));
 672                 break;
 673         }
 674
 675         return sstr;
 676 }
 677
 678 string
 679 GainMeterBase::astyle_string (AutoStyle style)
 680 {
 681         return _astyle_string (style, false);
 682 }
 683
 684 string
 685 GainMeterBase::short_astyle_string (AutoStyle style)
 686 {
 687         return _astyle_string (style, true);
 688 }
 689
 690 string
 691 GainMeterBase::_astyle_string (AutoStyle style, bool shrt)
 692 {
 693         if (style & Trim) {
 694                 return _("Trim");
 695         } else {
 696                 /* XXX it might different in different languages */
 697
 698                 return (shrt ? _("Abs") : _("Abs"));
 699         }
 700 }
 701
 702 void
 703 GainMeterBase::gain_automation_style_changed ()
 704 {
 705         switch (_width) {
 706         case Wide:
 707                 gain_automation_style_button.set_label (astyle_string(_amp->gain_control()->alist()->automation_style()));
 708                 break;
 709         case Narrow:
 710                 gain_automation_style_button.set_label  (short_astyle_string(_amp->gain_control()->alist()->automation_style()));
 711                 break;
 712         }
 713 }
 714
 715 void
 716 GainMeterBase::gain_automation_state_changed ()
 717 {
 718         ENSURE_GUI_THREAD(mem_fun(*this, &GainMeterBase::gain_automation_state_changed));
 719
 720         bool x;
 721
 722         switch (_width) {
 723         case Wide:
 724                 gain_automation_state_button.set_label (astate_string(_amp->gain_control()->alist()->automation_state()));
 725                 break;
 726         case Narrow:
 727                 gain_automation_state_button.set_label (short_astate_string(_amp->gain_control()->alist()->automation_state()));
 728                 break;
 729         }
 730
 731         x = (_amp->gain_control()->alist()->automation_state() != Off);
 732
 733         if (gain_automation_state_button.get_active() != x) {
 734                 ignore_toggle = true;
 735                 gain_automation_state_button.set_active (x);
 736                 ignore_toggle = false;
 737         }
 738
 739         update_gain_sensitive ();
 740
 741         /* start watching automation so that things move */
 742
 743         gain_watching.disconnect();
 744
 745         if (x) {
 746                 gain_watching = ARDOUR_UI::RapidScreenUpdate.connect (mem_fun (*this, &GainMeterBase::effective_gain_display));
 747         }
 748 }
 749
 750 void
 751 GainMeterBase::update_meters()
 752 {
 753         char buf[32];
 754         float mpeak = level_meter->update_meters();
 755
 756         if (mpeak > max_peak) {
 757                 max_peak = mpeak;
 758                 if (mpeak <= -200.0f) {
 759                         peak_display.set_label (_("-inf"));
 760                 } else {
 761                         snprintf (buf, sizeof(buf), "%.1f", mpeak);
 762                         peak_display.set_label (buf);
 763                 }
 764
 765                 if (mpeak >= 0.0f) {
 766                         peak_display.set_name ("MixerStripPeakDisplayPeak");
 767                 }
 768         }
 769 }
 770
 771 void GainMeterBase::color_handler(bool dpi)
 772 {
 773         color_changed = true;
 774         dpi_changed = (dpi) ? true : false;
 775         setup_meters();
 776 }
 777
 778 void
 779 GainMeterBase::set_width (Width w, int len)
 780 {
 781         _width = w;
 782         level_meter->setup_meters (len);
 783 }
 784
 785
 786 void
 787 GainMeterBase::on_theme_changed()
 788 {
 789         style_changed = true;
 790 }
 791
 792 GainMeter::GainMeter (Session& s)
 793         : GainMeterBase (s, slider, false)
 794 {
 795         gain_display_box.set_homogeneous (true);
 796         gain_display_box.set_spacing (2);
 797         gain_display_box.pack_start (gain_display, true, true);
 798
 799         meter_metric_area.set_name ("AudioTrackMetrics");
 800         set_size_request_to_display_given_text (meter_metric_area, "-50", 0, 0);
 801
 802         gain_automation_style_button.set_name ("MixerAutomationModeButton");
 803         gain_automation_state_button.set_name ("MixerAutomationPlaybackButton");
 804
 805         ARDOUR_UI::instance()->tooltips().set_tip (gain_automation_state_button, _("Fader automation mode"));
 806         ARDOUR_UI::instance()->tooltips().set_tip (gain_automation_style_button, _("Fader automation type"));
 807
 808         gain_automation_style_button.unset_flags (Gtk::CAN_FOCUS);
 809         gain_automation_state_button.unset_flags (Gtk::CAN_FOCUS);
 810
 811         gain_automation_state_button.set_size_request(15, 15);
 812         gain_automation_style_button.set_size_request(15, 15);
 813
 814         HBox* fader_centering_box = manage (new HBox);
 815         fader_centering_box->pack_start (*gain_slider, true, false);
 816
 817         fader_vbox = manage (new Gtk::VBox());
 818         fader_vbox->set_spacing (0);
 819         fader_vbox->pack_start (*fader_centering_box, false, false, 0);
 820
 821         hbox.set_spacing (2);
 822         hbox.pack_start (*fader_vbox, true, true);
 823
 824         set_spacing (2);
 825
 826         pack_start (gain_display_box, Gtk::PACK_SHRINK);
 827         pack_start (hbox, Gtk::PACK_SHRINK);
 828
 829         meter_metric_area.signal_expose_event().connect (mem_fun(*this, &GainMeter::meter_metrics_expose));
 830 }
 831
 832 void
 833 GainMeter::set_controls (boost::shared_ptr<Route> r,
 834                          boost::shared_ptr<PeakMeter> meter,
 835                          boost::shared_ptr<Amp> amp)
 836 {
 837         if (level_meter->get_parent()) {
 838                 hbox.remove (*level_meter);
 839         }
 840
 841         if (peak_display.get_parent()) {
 842                 gain_display_box.remove (peak_display);
 843         }
 844
 845         if (gain_automation_state_button.get_parent()) {
 846                 fader_vbox->remove (gain_automation_state_button);
 847         }
 848
 849         GainMeterBase::set_controls (r, meter, amp);
 850
 851         /*
 852            if we have a non-hidden route (ie. we're not the click or the auditioner),
 853            pack some route-dependent stuff.
 854         */
 855
 856         gain_display_box.pack_end (peak_display, true, true);
 857         hbox.pack_end (*level_meter, true, true);
 858
 859         if (!r->is_hidden()) {
 860                 fader_vbox->pack_start (gain_automation_state_button, false, false, 0);
 861         }
 862
 863         setup_meters ();
 864         hbox.show_all ();
 865 }
 866
 867 int
 868 GainMeter::get_gm_width ()
 869 {
 870         Gtk::Requisition sz;
 871         hbox.size_request (sz);
 872         return sz.width;
 873 }
 874
 875 Glib::RefPtr<Gdk::Pixmap>
 876 GainMeter::render_metrics (Gtk::Widget& w)
 877 {
 878         Glib::RefPtr<Gdk::Window> win (w.get_window());
 879         Glib::RefPtr<Gdk::GC> fg_gc (w.get_style()->get_fg_gc (Gtk::STATE_NORMAL));
 880         Glib::RefPtr<Gdk::GC> bg_gc (w.get_style()->get_bg_gc (Gtk::STATE_NORMAL));
 881         gint width, height;
 882         int  db_points[] = { -50, -40, -20, -30, -10, -3, 0, 4 };
 883         char buf[32];
 884
 885         win->get_size (width, height);
 886
 887         Glib::RefPtr<Gdk::Pixmap> pixmap = Gdk::Pixmap::create (win, width, height);
 888
 889         metric_pixmaps[w.get_name()] = pixmap;
 890
 891         pixmap->draw_rectangle (bg_gc, true, 0, 0, width, height);
 892
 893         Glib::RefPtr<Pango::Layout> layout = w.create_pango_layout("");
 894
 895         for (uint32_t i = 0; i < sizeof (db_points)/sizeof (db_points[0]); ++i) {
 896
 897                 float fraction = log_meter (db_points[i]);
 898                 gint pos = height - (gint) floor (height * fraction);
 899
 900                 snprintf (buf, sizeof (buf), "%d", abs (db_points[i]));
 901
 902                 layout->set_text (buf);
 903
 904                 /* we want logical extents, not ink extents here */
 905
 906                 int width, height;
 907                 layout->get_pixel_size (width, height);
 908
 909                 pixmap->draw_line (fg_gc, 0, pos, 4, pos);
 910                 pixmap->draw_layout (fg_gc, 6, pos - (height/2), layout);
 911         }
 912
 913         return pixmap;
 914 }
 915
 916 gint
 917 GainMeter::meter_metrics_expose (GdkEventExpose *ev)
 918 {
 919         static Glib::RefPtr<Gtk::Style> meter_style;
 920         if (style_changed) {
 921                 meter_style = meter_metric_area.get_style();
 922         }
 923         Glib::RefPtr<Gdk::Window> win (meter_metric_area.get_window());
 924         Glib::RefPtr<Gdk::GC> bg_gc (meter_style->get_bg_gc (Gtk::STATE_INSENSITIVE));
 925         GdkRectangle base_rect;
 926         GdkRectangle draw_rect;
 927         gint width, height;
 928
 929         win->get_size (width, height);
 930
 931         base_rect.width = width;
 932         base_rect.height = height;
 933         base_rect.x = 0;
 934         base_rect.y = 0;
 935
 936         Glib::RefPtr<Gdk::Pixmap> pixmap;
 937         std::map<string,Glib::RefPtr<Gdk::Pixmap> >::iterator i = metric_pixmaps.find (meter_metric_area.get_name());
 938
 939         if (i == metric_pixmaps.end() || style_changed || dpi_changed) {
 940                 pixmap = render_metrics (meter_metric_area);
 941         } else {
 942                 pixmap = i->second;
 943         }
 944
 945         gdk_rectangle_intersect (&ev->area, &base_rect, &draw_rect);
 946         win->draw_drawable (bg_gc, pixmap, draw_rect.x, draw_rect.y, draw_rect.x, draw_rect.y, draw_rect.width, draw_rect.height);
 947         style_changed = false;
 948         return true;
 949 }
 950
 951 boost::shared_ptr<PBD::Controllable>
 952 GainMeterBase::get_controllable()
 953 {
 954         if (_amp) {
 955                 return _amp->gain_control();
 956         } else {
 957                 return boost::shared_ptr<PBD::Controllable>();
 958         }
 959 }
 960
 961