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