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/stop_signal.h>
  36 #include <gtkmm2ext/barcontroller.h>
  37 #include <gtkmm2ext/gtk_ui.h>
  38 #include "midi++/manager.h"
  39 #include "pbd/fastlog.h"
  40 #include "pbd/stacktrace.h"
  41
  42 #include "ardour_ui.h"
  43 #include "gain_meter.h"
  44 #include "logmeter.h"
  45 #include "gui_thread.h"
  46 #include "keyboard.h"
  47 #include "public_editor.h"
  48 #include "utils.h"
  49
  50 #include "ardour/session.h"
  51 #include "ardour/route.h"
  52 #include "ardour/meter.h"
  53
  54 #include "i18n.h"
  55
  56 using namespace ARDOUR;
  57 using namespace PBD;
  58 using namespace Gtkmm2ext;
  59 using namespace Gtk;
  60 using namespace std;
  61 using Gtkmm2ext::Keyboard;
  62
  63 sigc::signal<void> GainMeterBase::ResetAllPeakDisplays;
  64 sigc::signal<void,RouteGroup*> GainMeterBase::ResetGroupPeakDisplays;
  65
  66 map<string,Glib::RefPtr<Gdk::Pixmap> > GainMeter::metric_pixmaps;
  67 Glib::RefPtr<Gdk::Pixbuf> GainMeter::slider;
  68
  69
  70 void
  71 GainMeter::setup_slider_pix ()
  72 {
  73         if ((slider = ::get_icon ("fader_belt")) == 0) {
  74                 throw failed_constructor();
  75         }
  76 }
  77
  78 GainMeterBase::GainMeterBase (Session* s,
  79                               const Glib::RefPtr<Gdk::Pixbuf>& pix,
  80                               bool horizontal,
  81                               int fader_length)
  82         : 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.
  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         set_session (s);
  92
  93         ignore_toggle = false;
  94         meter_menu = 0;
  95         next_release_selects = false;
  96         style_changed = true;
  97         _width = Wide;
  98
  99         if (horizontal) {
 100                 gain_slider = manage (new HSliderController (pix,
 101                                                              &gain_adjustment,
 102                                                              fader_length,
 103                                                              false));
 104         } else {
 105                 gain_slider = manage (new VSliderController (pix,
 106                                                              &gain_adjustment,
 107                                                              fader_length,
 108                                                              false));
 109         }
 110
 111         level_meter = new LevelMeter(_session);
 112
 113         gain_slider->signal_button_press_event().connect (sigc::mem_fun(*this, &GainMeter::start_gain_touch));
 114         gain_slider->signal_button_release_event().connect (sigc::mem_fun(*this, &GainMeter::end_gain_touch));
 115         gain_slider->set_name ("GainFader");
 116
 117         gain_display.set_name ("MixerStripGainDisplay");
 118         gain_display.set_has_frame (false);
 119         set_size_request_to_display_given_text (gain_display, "-80.g", 2, 6); /* note the descender */
 120         gain_display.signal_activate().connect (sigc::mem_fun (*this, &GainMeter::gain_activated));
 121         gain_display.signal_focus_in_event().connect (sigc::mem_fun (*this, &GainMeter::gain_focused), false);
 122         gain_display.signal_focus_out_event().connect (sigc::mem_fun (*this, &GainMeter::gain_focused), false);
 123
 124         peak_display.set_name ("MixerStripPeakDisplay");
 125 //      peak_display.set_has_frame (false);
 126 //      peak_display.set_editable (false);
 127         set_size_request_to_display_given_text  (peak_display, "-80.g", 2, 6); /* note the descender */
 128         max_peak = minus_infinity();
 129         peak_display.set_label (_("-inf"));
 130         peak_display.unset_flags (Gtk::CAN_FOCUS);
 131
 132         gain_automation_style_button.set_name ("MixerAutomationModeButton");
 133         gain_automation_state_button.set_name ("MixerAutomationPlaybackButton");
 134
 135         ARDOUR_UI::instance()->set_tip (gain_automation_state_button, _("Fader automation mode"));
 136         ARDOUR_UI::instance()->set_tip (gain_automation_style_button, _("Fader automation type"));
 137
 138         gain_automation_style_button.unset_flags (Gtk::CAN_FOCUS);
 139         gain_automation_state_button.unset_flags (Gtk::CAN_FOCUS);
 140
 141         gain_automation_state_button.set_size_request(15, 15);
 142         gain_automation_style_button.set_size_request(15, 15);
 143
 144         gain_astyle_menu.items().push_back (MenuElem (_("Trim")));
 145         gain_astyle_menu.items().push_back (MenuElem (_("Abs")));
 146
 147         gain_astate_menu.set_name ("ArdourContextMenu");
 148         gain_astyle_menu.set_name ("ArdourContextMenu");
 149
 150         gain_adjustment.signal_value_changed().connect (sigc::mem_fun(*this, &GainMeterBase::gain_adjusted));
 151         peak_display.signal_button_release_event().connect (sigc::mem_fun(*this, &GainMeterBase::peak_button_release), false);
 152         gain_display.signal_key_press_event().connect (sigc::mem_fun(*this, &GainMeterBase::gain_key_press), false);
 153
 154         ResetAllPeakDisplays.connect (sigc::mem_fun(*this, &GainMeterBase::reset_peak_display));
 155         ResetGroupPeakDisplays.connect (sigc::mem_fun(*this, &GainMeterBase::reset_group_peak_display));
 156
 157         UI::instance()->theme_changed.connect (sigc::mem_fun(*this, &GainMeterBase::on_theme_changed));
 158         ColorsChanged.connect (sigc::bind(sigc::mem_fun (*this, &GainMeterBase::color_handler), false));
 159         DPIReset.connect (sigc::bind(sigc::mem_fun (*this, &GainMeterBase::color_handler), true));
 160 }
 161
 162 GainMeterBase::~GainMeterBase ()
 163 {
 164         delete meter_menu;
 165         delete level_meter;
 166 }
 167
 168 void
 169 GainMeterBase::set_controls (boost::shared_ptr<Route> r,
 170                              boost::shared_ptr<PeakMeter> pm,
 171                              boost::shared_ptr<Amp> amp)
 172 {
 173         connections.clear ();
 174         model_connections.drop_connections ();
 175
 176         if (!pm && !amp) {
 177                 level_meter->set_meter (0);
 178                 gain_slider->set_controllable (boost::shared_ptr<PBD::Controllable>());
 179                 _meter.reset ();
 180                 _amp.reset ();
 181                 _route.reset ();
 182                 return;
 183         }
 184
 185         _meter = pm;
 186         _amp = amp;
 187         _route = r;
 188
 189         level_meter->set_meter (pm.get());
 190         gain_slider->set_controllable (amp->gain_control());
 191
 192         if (!_route || _route->output()->n_ports().n_midi() == 0) {
 193                 _is_midi = false;
 194                 gain_adjustment.set_lower (0.0);
 195                 gain_adjustment.set_upper (1.0);
 196                 gain_adjustment.set_step_increment (0.01);
 197                 gain_adjustment.set_page_increment (0.1);
 198         } else {
 199                 _is_midi = true;
 200                 gain_adjustment.set_lower (0.0);
 201                 gain_adjustment.set_upper (2.0);
 202                 gain_adjustment.set_step_increment (0.05);
 203                 gain_adjustment.set_page_increment (0.1);
 204         }
 205
 206         if (!_route || !_route->is_hidden()) {
 207
 208                 using namespace Menu_Helpers;
 209
 210                 gain_astate_menu.items().clear ();
 211
 212                 gain_astate_menu.items().push_back (MenuElem (_("Manual"),
 213                                                               sigc::bind (sigc::mem_fun (*(amp.get()), &Automatable::set_parameter_automation_state),
 214                                                                     Evoral::Parameter(GainAutomation), (AutoState) Off)));
 215                 gain_astate_menu.items().push_back (MenuElem (_("Play"),
 216                                                               sigc::bind (sigc::mem_fun (*(amp.get()), &Automatable::set_parameter_automation_state),
 217                                                                     Evoral::Parameter(GainAutomation), (AutoState) Play)));
 218                 gain_astate_menu.items().push_back (MenuElem (_("Write"),
 219                                                               sigc::bind (sigc::mem_fun (*(amp.get()), &Automatable::set_parameter_automation_state),
 220                                                                     Evoral::Parameter(GainAutomation), (AutoState) Write)));
 221                 gain_astate_menu.items().push_back (MenuElem (_("Touch"),
 222                                                               sigc::bind (sigc::mem_fun (*(amp.get()), &Automatable::set_parameter_automation_state),
 223                                                                     Evoral::Parameter(GainAutomation), (AutoState) Touch)));
 224
 225                 connections.push_back (gain_automation_style_button.signal_button_press_event().connect (sigc::mem_fun(*this, &GainMeterBase::gain_automation_style_button_event), false));
 226                 connections.push_back (gain_automation_state_button.signal_button_press_event().connect (sigc::mem_fun(*this, &GainMeterBase::gain_automation_state_button_event), false));
 227
 228                 boost::shared_ptr<AutomationControl> gc = amp->gain_control();
 229
 230                 gc->alist()->automation_state_changed.connect (model_connections, boost::bind (&GainMeter::gain_automation_state_changed, this), gui_context());
 231                 gc->alist()->automation_style_changed.connect (model_connections, boost::bind (&GainMeter::gain_automation_style_changed, this), gui_context());
 232
 233                 gain_automation_state_changed ();
 234         }
 235
 236         amp->gain_control()->Changed.connect (model_connections, boost::bind (&GainMeterBase::gain_changed, this), gui_context());
 237
 238         gain_changed ();
 239         show_gain ();
 240         update_gain_sensitive ();
 241 }
 242
 243 void
 244 GainMeterBase::hide_all_meters ()
 245 {
 246         level_meter->hide_meters();
 247 }
 248
 249 void
 250 GainMeter::hide_all_meters ()
 251 {
 252         bool remove_metric_area = false;
 253
 254         GainMeterBase::hide_all_meters ();
 255
 256         if (remove_metric_area) {
 257                 if (meter_metric_area.get_parent()) {
 258                         level_meter->remove (meter_metric_area);
 259                 }
 260         }
 261 }
 262
 263 void
 264 GainMeterBase::setup_meters (int len)
 265 {
 266         level_meter->setup_meters(len, 5);
 267 }
 268
 269 void
 270 GainMeter::setup_meters (int len)
 271 {
 272         if (!meter_metric_area.get_parent()) {
 273                 level_meter->pack_end (meter_metric_area, false, false);
 274                 meter_metric_area.show_all ();
 275         }
 276         GainMeterBase::setup_meters (len);
 277 }
 278
 279 bool
 280 GainMeterBase::gain_key_press (GdkEventKey* ev)
 281 {
 282         if (key_is_legal_for_numeric_entry (ev->keyval)) {
 283                 /* drop through to normal handling */
 284                 return false;
 285         }
 286         /* illegal key for gain entry */
 287         return true;
 288 }
 289
 290 bool
 291 GainMeterBase::peak_button_release (GdkEventButton* ev)
 292 {
 293         /* reset peak label */
 294
 295         if (ev->button == 1 && Keyboard::modifier_state_equals (ev->state, Keyboard::PrimaryModifier|Keyboard::TertiaryModifier)) {
 296                 ResetAllPeakDisplays ();
 297         } else if (ev->button == 1 && Keyboard::modifier_state_equals (ev->state, Keyboard::PrimaryModifier)) {
 298                 if (_route) {
 299                         ResetGroupPeakDisplays (_route->route_group());
 300                 }
 301         } else {
 302                 reset_peak_display ();
 303         }
 304
 305         return true;
 306 }
 307
 308 void
 309 GainMeterBase::reset_peak_display ()
 310 {
 311         _meter->reset_max();
 312         level_meter->clear_meters();
 313         max_peak = -INFINITY;
 314         peak_display.set_label (_("-Inf"));
 315         peak_display.set_name ("MixerStripPeakDisplay");
 316 }
 317
 318 void
 319 GainMeterBase::reset_group_peak_display (RouteGroup* group)
 320 {
 321         if (_route && group == _route->route_group()) {
 322                 reset_peak_display ();
 323                 }
 324 }
 325
 326 void
 327 GainMeterBase::popup_meter_menu (GdkEventButton *ev)
 328 {
 329         using namespace Menu_Helpers;
 330
 331         if (meter_menu == 0) {
 332                 meter_menu = new Gtk::Menu;
 333                 MenuList& items = meter_menu->items();
 334
 335                 items.push_back (MenuElem ("-inf .. +0dBFS"));
 336                 items.push_back (MenuElem ("-10dB .. +0dBFS"));
 337                 items.push_back (MenuElem ("-4 .. +0dBFS"));
 338                 items.push_back (SeparatorElem());
 339                 items.push_back (MenuElem ("-inf .. -2dBFS"));
 340                 items.push_back (MenuElem ("-10dB .. -2dBFS"));
 341                 items.push_back (MenuElem ("-4 .. -2dBFS"));
 342         }
 343
 344         meter_menu->popup (1, ev->time);
 345 }
 346
 347 bool
 348 GainMeterBase::gain_focused (GdkEventFocus* ev)
 349 {
 350         if (ev->in) {
 351                 gain_display.select_region (0, -1);
 352         } else {
 353                 gain_display.select_region (0, 0);
 354         }
 355         return false;
 356 }
 357
 358 void
 359 GainMeterBase::gain_activated ()
 360 {
 361         float f;
 362
 363         if (sscanf (gain_display.get_text().c_str(), "%f", &f) == 1) {
 364
 365                 /* clamp to displayable values */
 366
 367                 f = min (f, 6.0f);
 368
 369                 _amp->set_gain (dB_to_coefficient(f), this);
 370
 371                 if (gain_display.has_focus()) {
 372                         PublicEditor::instance().reset_focus();
 373                 }
 374         }
 375 }
 376
 377 void
 378 GainMeterBase::show_gain ()
 379 {
 380         char buf[32];
 381
 382         float v = gain_adjustment.get_value();
 383
 384         if (!_is_midi) {
 385                 if (v == 0.0) {
 386                         strcpy (buf, _("-inf"));
 387                 } else {
 388                         snprintf (buf, sizeof (buf), "%.1f", accurate_coefficient_to_dB (slider_position_to_gain (v)));
 389                 }
 390         } else {
 391                 snprintf (buf, sizeof (buf), "%.1f", v);
 392         }
 393
 394         gain_display.set_text (buf);
 395 }
 396
 397 void
 398 GainMeterBase::gain_adjusted ()
 399 {
 400         if (!ignore_toggle) {
 401                 if (_route) {
 402                         if (_route->amp() == _amp) {
 403                                 if (_is_midi) {
 404                                         _route->set_gain (gain_adjustment.get_value(), this);
 405                                 } else {
 406                                         _route->set_gain (slider_position_to_gain (gain_adjustment.get_value()), this);
 407                                 }
 408                         } else {
 409                                 _amp->set_gain (slider_position_to_gain (gain_adjustment.get_value()), this);
 410                         }
 411                 }
 412         }
 413
 414         show_gain ();
 415 }
 416
 417 void
 418 GainMeterBase::effective_gain_display ()
 419 {
 420         gfloat value;
 421
 422         if (!_route || _route->output()->n_ports().n_midi() == 0) {
 423                 value = gain_to_slider_position (_amp->gain());
 424         } else {
 425                 value = _amp->gain ();
 426         }
 427
 428         //cerr << this << " for " << _io->name() << " EGAIN = " << value
 429         //              << " AGAIN = " << gain_adjustment.get_value () << endl;
 430         // stacktrace (cerr, 20);
 431
 432         if (gain_adjustment.get_value() != value) {
 433                 ignore_toggle = true;
 434                 gain_adjustment.set_value (value);
 435                 ignore_toggle = false;
 436         }
 437 }
 438
 439 void
 440 GainMeterBase::gain_changed ()
 441 {
 442         Gtkmm2ext::UI::instance()->call_slot (boost::bind (&GainMeterBase::effective_gain_display, this));
 443 }
 444
 445 void
 446 GainMeterBase::set_meter_strip_name (const char * name)
 447 {
 448         meter_metric_area.set_name (name);
 449 }
 450
 451 void
 452 GainMeterBase::set_fader_name (const char * name)
 453 {
 454         gain_slider->set_name (name);
 455 }
 456
 457 void
 458 GainMeterBase::update_gain_sensitive ()
 459 {
 460         bool x = !(_amp->gain_control()->alist()->automation_state() & Play);
 461         static_cast<Gtkmm2ext::SliderController*>(gain_slider)->set_sensitive (x);
 462 }
 463
 464 static MeterPoint
 465 next_meter_point (MeterPoint mp)
 466 {
 467         switch (mp) {
 468         case MeterInput:
 469                 return MeterPreFader;
 470                 break;
 471
 472         case MeterPreFader:
 473                 return MeterPostFader;
 474                 break;
 475
 476         case MeterPostFader:
 477                 return MeterCustom;
 478                 break;
 479
 480         case MeterCustom:
 481                 return MeterInput;
 482                 break;
 483         }
 484
 485         /*NOTREACHED*/
 486         return MeterInput;
 487 }
 488
 489 gint
 490 GainMeterBase::meter_press(GdkEventButton* ev)
 491 {
 492         wait_for_release = false;
 493
 494         if (!_route) {
 495                 return FALSE;
 496         }
 497
 498         if (!ignore_toggle) {
 499
 500                 if (Keyboard::is_context_menu_event (ev)) {
 501
 502                         // no menu at this time.
 503
 504                 } else {
 505
 506                         if (Keyboard::is_button2_event(ev)) {
 507
 508                                 // Primary-button2 click is the midi binding click
 509                                 // button2-click is "momentary"
 510
 511                                 if (!Keyboard::modifier_state_equals (ev->state, Keyboard::ModifierMask (Keyboard::PrimaryModifier))) {
 512                                         wait_for_release = true;
 513                                         old_meter_point = _route->meter_point ();
 514                                 }
 515                         }
 516
 517                         if (_route && (ev->button == 1 || Keyboard::is_button2_event (ev))) {
 518
 519                                 if (Keyboard::modifier_state_equals (ev->state, Keyboard::ModifierMask (Keyboard::PrimaryModifier|Keyboard::TertiaryModifier))) {
 520
 521                                         /* Primary+Tertiary-click applies change to all routes */
 522
 523                                         _session->foreach_route (this, &GainMeterBase::set_meter_point, next_meter_point (_route->meter_point()));
 524
 525
 526                                 } else if (Keyboard::modifier_state_equals (ev->state, Keyboard::PrimaryModifier)) {
 527
 528                                         /* Primary-click: solo mix group.
 529                                            NOTE: Primary-button2 is MIDI learn.
 530                                         */
 531
 532                                         if (ev->button == 1) {
 533                                                 set_mix_group_meter_point (*_route, next_meter_point (_route->meter_point()));
 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 (*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 (sigc::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, int fader_length)
 793         : GainMeterBase (s, slider, false, fader_length)
 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()->set_tip (gain_automation_state_button, _("Fader automation mode"));
 806         ARDOUR_UI::instance()->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 (sigc::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 && !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