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