gtk2_ardour/gain_meter.cc

   1 /*
   2   Copyright (C) 2002 Paul Davis
   3
   4   This program is free software; you can redistribute it and/or modify
   5   it under the terms of the GNU General Public License as published by
   6   the Free Software Foundation; either version 2 of the License, or
   7   (at your option) any later version.
   8
   9   This program is distributed in the hope that it will be useful,
  10   but WITHOUT ANY WARRANTY; without even the implied warranty of
  11   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12   GNU General Public License for more details.
  13
  14   You should have received a copy of the GNU General Public License
  15   along with this program; if not, write to the Free Software
  16   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  17
  18 */
  19
  20 #include <limits.h>
  21
  22 #include "ardour/io.h"
  23 #include "ardour/route.h"
  24 #include "ardour/route_group.h"
  25 #include "ardour/session.h"
  26 #include "ardour/session_route.h"
  27 #include "ardour/dB.h"
  28
  29 #include <gtkmm/style.h>
  30 #include <gdkmm/color.h>
  31 #include <gtkmm2ext/utils.h>
  32 #include <gtkmm2ext/fastmeter.h>
  33 #include <gtkmm2ext/stop_signal.h>
  34 #include <gtkmm2ext/barcontroller.h>
  35 #include <gtkmm2ext/gtk_ui.h>
  36 #include "midi++/manager.h"
  37 #include "pbd/fastlog.h"
  38 #include "pbd/stacktrace.h"
  39
  40 #include "ardour_ui.h"
  41 #include "gain_meter.h"
  42 #include "utils.h"
  43 #include "logmeter.h"
  44 #include "gui_thread.h"
  45 #include "keyboard.h"
  46 #include "public_editor.h"
  47
  48 #include "ardour/session.h"
  49 #include "ardour/route.h"
  50 #include "ardour/meter.h"
  51
  52 #include "i18n.h"
  53
  54 using namespace ARDOUR;
  55 using namespace PBD;
  56 using namespace Gtkmm2ext;
  57 using namespace Gtk;
  58 using namespace sigc;
  59 using namespace std;
  60
  61 sigc::signal<void> GainMeterBase::ResetAllPeakDisplays;
  62 sigc::signal<void,RouteGroup*> GainMeterBase::ResetGroupPeakDisplays;
  63
  64 map<string,Glib::RefPtr<Gdk::Pixmap> > GainMeter::metric_pixmaps;
  65 Glib::RefPtr<Gdk::Pixbuf> GainMeter::slider;
  66
  67
  68 void
  69 GainMeter::setup_slider_pix ()
  70 {
  71         if ((slider = ::get_icon ("fader_belt")) == 0) {
  72                 throw failed_constructor();
  73         }
  74 }
  75
  76 GainMeterBase::GainMeterBase (Session& s,
  77                               const Glib::RefPtr<Gdk::Pixbuf>& pix,
  78                               bool horizontal)
  79         : _session (s),
  80           // 0.781787 is the value needed for gain to be set to 0.
  81           gain_adjustment (0.781787, 0.0, 1.0, 0.01, 0.1),
  82           gain_automation_style_button (""),
  83           gain_automation_state_button (""),
  84           dpi_changed (false)
  85
  86 {
  87         using namespace Menu_Helpers;
  88
  89         ignore_toggle = false;
  90         meter_menu = 0;
  91         next_release_selects = false;
  92         style_changed = true;
  93         _width = Wide;
  94
  95         if (horizontal) {
  96                 gain_slider = manage (new HSliderController (pix,
  97                                                              &gain_adjustment,
  98                                                              false));
  99         } else {
 100                 gain_slider = manage (new VSliderController (pix,
 101                                                              &gain_adjustment,
 102                                                              false));
 103         }
 104
 105         level_meter = new LevelMeter(_session);
 106
 107         gain_slider->signal_button_press_event().connect (mem_fun(*this, &GainMeter::start_gain_touch));
 108         gain_slider->signal_button_release_event().connect (mem_fun(*this, &GainMeter::end_gain_touch));
 109         gain_slider->set_name ("GainFader");
 110
 111         gain_display.set_name ("MixerStripGainDisplay");
 112         gain_display.set_has_frame (false);
 113         set_size_request_to_display_given_text (gain_display, "-80.g", 2, 6); /* note the descender */
 114         gain_display.signal_activate().connect (mem_fun (*this, &GainMeter::gain_activated));
 115         gain_display.signal_focus_in_event().connect (mem_fun (*this, &GainMeter::gain_focused), false);
 116         gain_display.signal_focus_out_event().connect (mem_fun (*this, &GainMeter::gain_focused), false);
 117
 118         peak_display.set_name ("MixerStripPeakDisplay");
 119 //      peak_display.set_has_frame (false);
 120 //      peak_display.set_editable (false);
 121         set_size_request_to_display_given_text  (peak_display, "-80.g", 2, 6); /* note the descender */
 122         max_peak = minus_infinity();
 123         peak_display.set_label (_("-inf"));
 124         peak_display.unset_flags (Gtk::CAN_FOCUS);
 125
 126         gain_automation_style_button.set_name ("MixerAutomationModeButton");
 127         gain_automation_state_button.set_name ("MixerAutomationPlaybackButton");
 128
 129         ARDOUR_UI::instance()->tooltips().set_tip (gain_automation_state_button, _("Fader automation mode"));
 130         ARDOUR_UI::instance()->tooltips().set_tip (gain_automation_style_button, _("Fader automation type"));
 131
 132         gain_automation_style_button.unset_flags (Gtk::CAN_FOCUS);
 133         gain_automation_state_button.unset_flags (Gtk::CAN_FOCUS);
 134
 135         gain_automation_state_button.set_size_request(15, 15);
 136         gain_automation_style_button.set_size_request(15, 15);
 137
 138         gain_astyle_menu.items().push_back (MenuElem (_("Trim")));
 139         gain_astyle_menu.items().push_back (MenuElem (_("Abs")));
 140
 141         gain_astate_menu.set_name ("ArdourContextMenu");
 142         gain_astyle_menu.set_name ("ArdourContextMenu");
 143
 144         gain_adjustment.signal_value_changed().connect (mem_fun(*this, &GainMeterBase::gain_adjusted));
 145         peak_display.signal_button_release_event().connect (mem_fun(*this, &GainMeterBase::peak_button_release), false);
 146         gain_display.signal_key_press_event().connect (mem_fun(*this, &GainMeterBase::gain_key_press), false);
 147
 148         ResetAllPeakDisplays.connect (mem_fun(*this, &GainMeterBase::reset_peak_display));
 149         ResetGroupPeakDisplays.connect (mem_fun(*this, &GainMeterBase::reset_group_peak_display));
 150
 151         UI::instance()->theme_changed.connect (mem_fun(*this, &GainMeterBase::on_theme_changed));
 152         ColorsChanged.connect (bind(mem_fun (*this, &GainMeterBase::color_handler), false));
 153         DPIReset.connect (bind(mem_fun (*this, &GainMeterBase::color_handler), true));
 154 }
 155
 156 GainMeterBase::~GainMeterBase ()
 157 {
 158         delete meter_menu;
 159         delete level_meter;
 160 }
 161
 162 void
 163 GainMeterBase::set_controls (boost::shared_ptr<Route> r,
 164                              boost::shared_ptr<PeakMeter> pm,
 165                              boost::shared_ptr<AutomationControl> gc,
 166                              boost::shared_ptr<Automatable> gc_owner)
 167 {
 168         connections.clear ();
 169
 170         if (!pm && !gc) {
 171                 level_meter->set_meter (0);
 172                 gain_slider->set_controllable (boost::shared_ptr<PBD::Controllable>());
 173                 _meter.reset ();
 174                 _gain_control.reset ();
 175                 _route.reset ();
 176                 return;
 177         }
 178
 179         _meter = pm;
 180         _gain_control = gc;
 181         _route = r;
 182
 183         level_meter->set_meter (pm.get());
 184         gain_slider->set_controllable (gc);
 185
 186         if (!_route || !_route->is_hidden()) {
 187
 188                 using namespace Menu_Helpers;
 189
 190                 gain_astate_menu.items().clear ();
 191
 192                 gain_astate_menu.items().push_back (MenuElem (_("Manual"),
 193                                                               bind (mem_fun (*(gc_owner.get()), &Automatable::set_parameter_automation_state),
 194                                                                     Evoral::Parameter(GainAutomation), (AutoState) Off)));
 195                 gain_astate_menu.items().push_back (MenuElem (_("Play"),
 196                                                               bind (mem_fun (*(gc_owner.get()), &Automatable::set_parameter_automation_state),
 197                                                                     Evoral::Parameter(GainAutomation), (AutoState) Play)));
 198                 gain_astate_menu.items().push_back (MenuElem (_("Write"),
 199                                                               bind (mem_fun (*(gc_owner.get()), &Automatable::set_parameter_automation_state),
 200                                                                     Evoral::Parameter(GainAutomation), (AutoState) Write)));
 201                 gain_astate_menu.items().push_back (MenuElem (_("Touch"),
 202                                                               bind (mem_fun (*(gc_owner.get()), &Automatable::set_parameter_automation_state),
 203                                                                     Evoral::Parameter(GainAutomation), (AutoState) Touch)));
 204
 205                 connections.push_back (gain_automation_style_button.signal_button_press_event().connect (mem_fun(*this, &GainMeterBase::gain_automation_style_button_event), false));
 206                 connections.push_back (gain_automation_state_button.signal_button_press_event().connect (mem_fun(*this, &GainMeterBase::gain_automation_state_button_event), false));
 207
 208                 connections.push_back (gc->alist()->automation_state_changed.connect (mem_fun(*this, &GainMeter::gain_automation_state_changed)));
 209                 connections.push_back (gc->alist()->automation_style_changed.connect (mem_fun(*this, &GainMeter::gain_automation_style_changed)));
 210
 211                 gain_automation_state_changed ();
 212         }
 213
 214         connections.push_back (gc->Changed.connect (mem_fun (*this, &GainMeterBase::gain_changed)));
 215
 216         gain_changed ();
 217         show_gain ();
 218         update_gain_sensitive ();
 219 }
 220
 221 void
 222 GainMeterBase::hide_all_meters ()
 223 {
 224         level_meter->hide_meters();
 225 }
 226
 227 void
 228 GainMeter::hide_all_meters ()
 229 {
 230         bool remove_metric_area = false;
 231
 232         GainMeterBase::hide_all_meters ();
 233
 234         if (remove_metric_area) {
 235                 if (meter_metric_area.get_parent()) {
 236                         level_meter->remove (meter_metric_area);
 237                 }
 238         }
 239 }
 240
 241 void
 242 GainMeterBase::setup_meters (int len)
 243 {
 244         level_meter->setup_meters(len, 5);
 245 }
 246
 247 void
 248 GainMeter::setup_meters (int len)
 249 {
 250         if (!meter_metric_area.get_parent()) {
 251                 level_meter->pack_end (meter_metric_area, false, false);
 252                 meter_metric_area.show_all ();
 253         }
 254         GainMeterBase::setup_meters (len);
 255 }
 256
 257 bool
 258 GainMeterBase::gain_key_press (GdkEventKey* ev)
 259 {
 260         if (key_is_legal_for_numeric_entry (ev->keyval)) {
 261                 /* drop through to normal handling */
 262                 return false;
 263         }
 264         /* illegal key for gain entry */
 265         return true;
 266 }
 267
 268 bool
 269 GainMeterBase::peak_button_release (GdkEventButton* ev)
 270 {
 271         /* reset peak label */
 272
 273         if (ev->button == 1 && Keyboard::modifier_state_equals (ev->state, Keyboard::PrimaryModifier|Keyboard::TertiaryModifier)) {
 274                 ResetAllPeakDisplays ();
 275         } else if (ev->button == 1 && Keyboard::modifier_state_equals (ev->state, Keyboard::PrimaryModifier)) {
 276                 if (_route) {
 277                         ResetGroupPeakDisplays (_route->route_group());
 278                 }
 279         } else {
 280                 reset_peak_display ();
 281         }
 282
 283         return true;
 284 }
 285
 286 void
 287 GainMeterBase::reset_peak_display ()
 288 {
 289         _meter->reset_max();
 290         level_meter->clear_meters();
 291         max_peak = -INFINITY;
 292         peak_display.set_label (_("-Inf"));
 293         peak_display.set_name ("MixerStripPeakDisplay");
 294 }
 295
 296 void
 297 GainMeterBase::reset_group_peak_display (RouteGroup* group)
 298 {
 299         if (_route && group == _route->route_group()) {
 300                 reset_peak_display ();
 301                 }
 302 }
 303
 304 void
 305 GainMeterBase::popup_meter_menu (GdkEventButton *ev)
 306 {
 307         using namespace Menu_Helpers;
 308
 309         if (meter_menu == 0) {
 310                 meter_menu = new Gtk::Menu;
 311                 MenuList& items = meter_menu->items();
 312
 313                 items.push_back (MenuElem ("-inf .. +0dBFS"));
 314                 items.push_back (MenuElem ("-10dB .. +0dBFS"));
 315                 items.push_back (MenuElem ("-4 .. +0dBFS"));
 316                 items.push_back (SeparatorElem());
 317                 items.push_back (MenuElem ("-inf .. -2dBFS"));
 318                 items.push_back (MenuElem ("-10dB .. -2dBFS"));
 319                 items.push_back (MenuElem ("-4 .. -2dBFS"));
 320         }
 321
 322         meter_menu->popup (1, ev->time);
 323 }
 324
 325 bool
 326 GainMeterBase::gain_focused (GdkEventFocus* ev)
 327 {
 328         if (ev->in) {
 329                 gain_display.select_region (0, -1);
 330         } else {
 331                 gain_display.select_region (0, 0);
 332         }
 333         return false;
 334 }
 335
 336 void
 337 GainMeterBase::gain_activated ()
 338 {
 339         float f;
 340
 341         if (sscanf (gain_display.get_text().c_str(), "%f", &f) == 1) {
 342
 343                 /* clamp to displayable values */
 344
 345                 f = min (f, 6.0f);
 346
 347                 _gain_control->set_value (dB_to_coefficient(f));
 348
 349                 if (gain_display.has_focus()) {
 350                         PublicEditor::instance().reset_focus();
 351                 }
 352         }
 353 }
 354
 355 void
 356 GainMeterBase::show_gain ()
 357 {
 358         char buf[32];
 359
 360         float v = gain_adjustment.get_value();
 361
 362         if (v == 0.0) {
 363                 strcpy (buf, _("-inf"));
 364         } else {
 365                 snprintf (buf, 32, "%.1f", coefficient_to_dB (slider_position_to_gain (v)));
 366         }
 367
 368         gain_display.set_text (buf);
 369 }
 370
 371 void
 372 GainMeterBase::gain_adjusted ()
 373 {
 374         if (!ignore_toggle) {
 375                 if (_route) {
 376                         _route->set_gain (slider_position_to_gain (gain_adjustment.get_value()), this);
 377                 }
 378         }
 379
 380         show_gain ();
 381 }
 382
 383 void
 384 GainMeterBase::effective_gain_display ()
 385 {
 386         gfloat value = gain_to_slider_position (_gain_control->get_value());
 387
 388         //cerr << this << " for " << _io->name() << " EGAIN = " << value
 389         //              << " AGAIN = " << gain_adjustment.get_value () << endl;
 390         // stacktrace (cerr, 20);
 391
 392         if (gain_adjustment.get_value() != value) {
 393                 ignore_toggle = true;
 394                 gain_adjustment.set_value (value);
 395                 ignore_toggle = false;
 396         }
 397 }
 398
 399 void
 400 GainMeterBase::gain_changed ()
 401 {
 402         Gtkmm2ext::UI::instance()->call_slot (mem_fun(*this, &GainMeterBase::effective_gain_display));
 403 }
 404
 405 void
 406 GainMeterBase::set_meter_strip_name (const char * name)
 407 {
 408         meter_metric_area.set_name (name);
 409 }
 410
 411 void
 412 GainMeterBase::set_fader_name (const char * name)
 413 {
 414         gain_slider->set_name (name);
 415 }
 416
 417 void
 418 GainMeterBase::update_gain_sensitive ()
 419 {
 420         static_cast<Gtkmm2ext::SliderController*>(gain_slider)->set_sensitive (
 421                         !(_gain_control->alist()->automation_state() & Play));
 422 }
 423
 424
 425 static MeterPoint
 426 next_meter_point (MeterPoint mp)
 427 {
 428         switch (mp) {
 429         case MeterInput:
 430                 return MeterPreFader;
 431                 break;
 432
 433         case MeterPreFader:
 434                 return MeterPostFader;
 435                 break;
 436
 437         case MeterPostFader:
 438                 return MeterInput;
 439                 break;
 440         }
 441         /*NOTREACHED*/
 442         return MeterInput;
 443 }
 444
 445 gint
 446 GainMeterBase::meter_press(GdkEventButton* ev)
 447 {
 448         wait_for_release = false;
 449
 450         if (!_route) {
 451                 return FALSE;
 452         }
 453
 454         if (!ignore_toggle) {
 455
 456                 if (Keyboard::is_context_menu_event (ev)) {
 457
 458                         // no menu at this time.
 459
 460                 } else {
 461
 462                         if (Keyboard::is_button2_event(ev)) {
 463
 464                                 // Primary-button2 click is the midi binding click
 465                                 // button2-click is "momentary"
 466
 467                                 if (!Keyboard::modifier_state_equals (ev->state, Keyboard::ModifierMask (Keyboard::PrimaryModifier))) {
 468                                         wait_for_release = true;
 469                                         old_meter_point = _route->meter_point ();
 470                                 }
 471                         }
 472
 473                         if (_route && (ev->button == 1 || Keyboard::is_button2_event (ev))) {
 474
 475                                 if (Keyboard::modifier_state_equals (ev->state, Keyboard::ModifierMask (Keyboard::PrimaryModifier|Keyboard::TertiaryModifier))) {
 476
 477                                         /* Primary+Tertiary-click applies change to all routes */
 478
 479                                         _session.begin_reversible_command (_("meter point change"));
 480                                         Session::GlobalMeteringStateCommand *cmd = new Session::GlobalMeteringStateCommand (_session, this);
 481                                         _session.foreach_route (this, &GainMeterBase::set_meter_point, next_meter_point (_route->meter_point()));
 482                                         cmd->mark();
 483                                         _session.add_command (cmd);
 484                                         _session.commit_reversible_command ();
 485
 486
 487                                 } else if (Keyboard::modifier_state_equals (ev->state, Keyboard::PrimaryModifier)) {
 488
 489                                         /* Primary-click: solo mix group.
 490                                            NOTE: Primary-button2 is MIDI learn.
 491                                         */
 492
 493                                         if (ev->button == 1) {
 494                                                 _session.begin_reversible_command (_("meter point change"));
 495                                                 Session::GlobalMeteringStateCommand *cmd = new Session::GlobalMeteringStateCommand (_session, this);
 496                                                 set_mix_group_meter_point (*_route, next_meter_point (_route->meter_point()));
 497                                                 cmd->mark();
 498                                                 _session.add_command (cmd);
 499                                                 _session.commit_reversible_command ();
 500                                         }
 501
 502                                 } else {
 503
 504                                         /* click: change just this route */
 505
 506                                         // XXX no undo yet
 507
 508                                         _route->set_meter_point (next_meter_point (_route->meter_point()), this);
 509                                 }
 510                         }
 511                 }
 512         }
 513
 514         return true;
 515
 516 }
 517
 518 gint
 519 GainMeterBase::meter_release(GdkEventButton* ev)
 520 {
 521         if(!ignore_toggle){
 522                 if (wait_for_release){
 523                         wait_for_release = false;
 524
 525                         if (_route) {
 526                                 set_meter_point (*_route, old_meter_point);
 527                         }
 528                 }
 529         }
 530
 531         return true;
 532 }
 533
 534 void
 535 GainMeterBase::set_meter_point (Route& route, MeterPoint mp)
 536 {
 537         route.set_meter_point (mp, this);
 538 }
 539
 540 void
 541 GainMeterBase::set_mix_group_meter_point (Route& route, MeterPoint mp)
 542 {
 543         RouteGroup* mix_group;
 544
 545         if((mix_group = route.route_group()) != 0){
 546                 mix_group->apply (&Route::set_meter_point, mp, this);
 547         } else {
 548                 route.set_meter_point (mp, this);
 549         }
 550 }
 551
 552 void
 553 GainMeterBase::meter_point_clicked ()
 554 {
 555         if (_route) {
 556                 /* WHAT? */
 557         }
 558 }
 559
 560 gint
 561 GainMeterBase::start_gain_touch (GdkEventButton* ev)
 562 {
 563         _gain_control->start_touch ();
 564         return FALSE;
 565 }
 566
 567 gint
 568 GainMeterBase::end_gain_touch (GdkEventButton* ev)
 569 {
 570         _gain_control->stop_touch ();
 571         return FALSE;
 572 }
 573
 574 gint
 575 GainMeterBase::gain_automation_state_button_event (GdkEventButton *ev)
 576 {
 577         if (ev->type == GDK_BUTTON_RELEASE) {
 578                 return TRUE;
 579         }
 580
 581         switch (ev->button) {
 582                 case 1:
 583                         gain_astate_menu.popup (1, ev->time);
 584                         break;
 585                 default:
 586                         break;
 587         }
 588
 589         return TRUE;
 590 }
 591
 592 gint
 593 GainMeterBase::gain_automation_style_button_event (GdkEventButton *ev)
 594 {
 595         if (ev->type == GDK_BUTTON_RELEASE) {
 596                 return TRUE;
 597         }
 598
 599         switch (ev->button) {
 600         case 1:
 601                 gain_astyle_menu.popup (1, ev->time);
 602                 break;
 603         default:
 604                 break;
 605         }
 606         return TRUE;
 607 }
 608
 609 string
 610 GainMeterBase::astate_string (AutoState state)
 611 {
 612         return _astate_string (state, false);
 613 }
 614
 615 string
 616 GainMeterBase::short_astate_string (AutoState state)
 617 {
 618         return _astate_string (state, true);
 619 }
 620
 621 string
 622 GainMeterBase::_astate_string (AutoState state, bool shrt)
 623 {
 624         string sstr;
 625
 626         switch (state) {
 627         case Off:
 628                 sstr = (shrt ? "M" : _("M"));
 629                 break;
 630         case Play:
 631                 sstr = (shrt ? "P" : _("P"));
 632                 break;
 633         case Touch:
 634                 sstr = (shrt ? "T" : _("T"));
 635                 break;
 636         case Write:
 637                 sstr = (shrt ? "W" : _("W"));
 638                 break;
 639         }
 640
 641         return sstr;
 642 }
 643
 644 string
 645 GainMeterBase::astyle_string (AutoStyle style)
 646 {
 647         return _astyle_string (style, false);
 648 }
 649
 650 string
 651 GainMeterBase::short_astyle_string (AutoStyle style)
 652 {
 653         return _astyle_string (style, true);
 654 }
 655
 656 string
 657 GainMeterBase::_astyle_string (AutoStyle style, bool shrt)
 658 {
 659         if (style & Trim) {
 660                 return _("Trim");
 661         } else {
 662                 /* XXX it might different in different languages */
 663
 664                 return (shrt ? _("Abs") : _("Abs"));
 665         }
 666 }
 667
 668 void
 669 GainMeterBase::gain_automation_style_changed ()
 670 {
 671         switch (_width) {
 672         case Wide:
 673                 gain_automation_style_button.set_label (astyle_string(_gain_control->alist()->automation_style()));
 674                 break;
 675         case Narrow:
 676                 gain_automation_style_button.set_label  (short_astyle_string(_gain_control->alist()->automation_style()));
 677                 break;
 678         }
 679 }
 680
 681 void
 682 GainMeterBase::gain_automation_state_changed ()
 683 {
 684         ENSURE_GUI_THREAD(mem_fun(*this, &GainMeterBase::gain_automation_state_changed));
 685
 686         bool x;
 687
 688         switch (_width) {
 689         case Wide:
 690                 gain_automation_state_button.set_label (astate_string(_gain_control->alist()->automation_state()));
 691                 break;
 692         case Narrow:
 693                 gain_automation_state_button.set_label (short_astate_string(_gain_control->alist()->automation_state()));
 694                 break;
 695         }
 696
 697         x = (_gain_control->alist()->automation_state() != Off);
 698
 699         if (gain_automation_state_button.get_active() != x) {
 700                 ignore_toggle = true;
 701                 gain_automation_state_button.set_active (x);
 702                 ignore_toggle = false;
 703         }
 704
 705         update_gain_sensitive ();
 706
 707         /* start watching automation so that things move */
 708
 709         gain_watching.disconnect();
 710
 711         if (x) {
 712                 gain_watching = ARDOUR_UI::RapidScreenUpdate.connect (mem_fun (*this, &GainMeterBase::effective_gain_display));
 713         }
 714 }
 715
 716 void
 717 GainMeterBase::update_meters()
 718 {
 719         char buf[32];
 720         float mpeak = level_meter->update_meters();
 721
 722         if (mpeak > max_peak) {
 723                 max_peak = mpeak;
 724                 if (mpeak <= -200.0f) {
 725                         peak_display.set_label (_("-inf"));
 726                 } else {
 727                         snprintf (buf, sizeof(buf), "%.1f", mpeak);
 728                         peak_display.set_label (buf);
 729                 }
 730
 731                 if (mpeak >= 0.0f) {
 732                         peak_display.set_name ("MixerStripPeakDisplayPeak");
 733                 }
 734         }
 735 }
 736
 737 void GainMeterBase::color_handler(bool dpi)
 738 {
 739         color_changed = true;
 740         dpi_changed = (dpi) ? true : false;
 741         setup_meters();
 742 }
 743
 744 void
 745 GainMeterBase::set_width (Width w, int len)
 746 {
 747         _width = w;
 748         level_meter->setup_meters (len);
 749 }
 750
 751
 752 void
 753 GainMeterBase::on_theme_changed()
 754 {
 755         style_changed = true;
 756 }
 757
 758 GainMeter::GainMeter (Session& s)
 759         : GainMeterBase (s, slider, false)
 760 {
 761         gain_display_box.set_homogeneous (true);
 762         gain_display_box.set_spacing (2);
 763         gain_display_box.pack_start (gain_display, true, true);
 764
 765         meter_metric_area.set_name ("AudioTrackMetrics");
 766         set_size_request_to_display_given_text (meter_metric_area, "-50", 0, 0);
 767
 768         gain_automation_style_button.set_name ("MixerAutomationModeButton");
 769         gain_automation_state_button.set_name ("MixerAutomationPlaybackButton");
 770
 771         ARDOUR_UI::instance()->tooltips().set_tip (gain_automation_state_button, _("Fader automation mode"));
 772         ARDOUR_UI::instance()->tooltips().set_tip (gain_automation_style_button, _("Fader automation type"));
 773
 774         gain_automation_style_button.unset_flags (Gtk::CAN_FOCUS);
 775         gain_automation_state_button.unset_flags (Gtk::CAN_FOCUS);
 776
 777         gain_automation_state_button.set_size_request(15, 15);
 778         gain_automation_style_button.set_size_request(15, 15);
 779
 780         HBox* fader_centering_box = manage (new HBox);
 781         fader_centering_box->pack_start (*gain_slider, true, false);
 782
 783         fader_vbox = manage (new Gtk::VBox());
 784         fader_vbox->set_spacing (0);
 785         fader_vbox->pack_start (*fader_centering_box, false, false, 0);
 786
 787         hbox.set_spacing (2);
 788         hbox.pack_start (*fader_vbox, true, true);
 789
 790         set_spacing (2);
 791
 792         pack_start (gain_display_box, Gtk::PACK_SHRINK);
 793         pack_start (hbox, Gtk::PACK_SHRINK);
 794
 795         meter_metric_area.signal_expose_event().connect (mem_fun(*this, &GainMeter::meter_metrics_expose));
 796 }
 797
 798 void
 799 GainMeter::set_controls (boost::shared_ptr<Route> r,
 800                          boost::shared_ptr<PeakMeter> meter,
 801                          boost::shared_ptr<AutomationControl> gain_control,
 802                          boost::shared_ptr<Automatable> gc_owner)
 803 {
 804         if (level_meter->get_parent()) {
 805                 hbox.remove (*level_meter);
 806         }
 807
 808         if (peak_display.get_parent()) {
 809                 gain_display_box.remove (peak_display);
 810         }
 811
 812         if (gain_automation_state_button.get_parent()) {
 813                 fader_vbox->remove (gain_automation_state_button);
 814         }
 815
 816         GainMeterBase::set_controls (r, meter, gain_control, gc_owner);
 817
 818         /*
 819            if we have a non-hidden route (ie. we're not the click or the auditioner),
 820            pack some route-dependent stuff.
 821         */
 822
 823         gain_display_box.pack_end (peak_display, true, true);
 824         hbox.pack_end (*level_meter, true, true);
 825
 826         if (!r->is_hidden()) {
 827                 fader_vbox->pack_start (gain_automation_state_button, false, false, 0);
 828         }
 829 }
 830
 831 int
 832 GainMeter::get_gm_width ()
 833 {
 834         Gtk::Requisition sz;
 835         hbox.size_request (sz);
 836         return sz.width;
 837 }
 838
 839 Glib::RefPtr<Gdk::Pixmap>
 840 GainMeter::render_metrics (Gtk::Widget& w)
 841 {
 842         Glib::RefPtr<Gdk::Window> win (w.get_window());
 843         Glib::RefPtr<Gdk::GC> fg_gc (w.get_style()->get_fg_gc (Gtk::STATE_NORMAL));
 844         Glib::RefPtr<Gdk::GC> bg_gc (w.get_style()->get_bg_gc (Gtk::STATE_NORMAL));
 845         gint width, height;
 846         int  db_points[] = { -50, -40, -20, -30, -10, -3, 0, 4 };
 847         char buf[32];
 848
 849         win->get_size (width, height);
 850
 851         Glib::RefPtr<Gdk::Pixmap> pixmap = Gdk::Pixmap::create (win, width, height);
 852
 853         metric_pixmaps[w.get_name()] = pixmap;
 854
 855         pixmap->draw_rectangle (bg_gc, true, 0, 0, width, height);
 856
 857         Glib::RefPtr<Pango::Layout> layout = w.create_pango_layout("");
 858
 859         for (uint32_t i = 0; i < sizeof (db_points)/sizeof (db_points[0]); ++i) {
 860
 861                 float fraction = log_meter (db_points[i]);
 862                 gint pos = height - (gint) floor (height * fraction);
 863
 864                 snprintf (buf, sizeof (buf), "%d", abs (db_points[i]));
 865
 866                 layout->set_text (buf);
 867
 868                 /* we want logical extents, not ink extents here */
 869
 870                 int width, height;
 871                 layout->get_pixel_size (width, height);
 872
 873                 pixmap->draw_line (fg_gc, 0, pos, 4, pos);
 874                 pixmap->draw_layout (fg_gc, 6, pos - (height/2), layout);
 875         }
 876
 877         return pixmap;
 878 }
 879
 880 gint
 881 GainMeter::meter_metrics_expose (GdkEventExpose *ev)
 882 {
 883         static Glib::RefPtr<Gtk::Style> meter_style;
 884         if (style_changed) {
 885                 meter_style = meter_metric_area.get_style();
 886         }
 887         Glib::RefPtr<Gdk::Window> win (meter_metric_area.get_window());
 888         Glib::RefPtr<Gdk::GC> bg_gc (meter_style->get_bg_gc (Gtk::STATE_INSENSITIVE));
 889         GdkRectangle base_rect;
 890         GdkRectangle draw_rect;
 891         gint width, height;
 892
 893         win->get_size (width, height);
 894
 895         base_rect.width = width;
 896         base_rect.height = height;
 897         base_rect.x = 0;
 898         base_rect.y = 0;
 899
 900         Glib::RefPtr<Gdk::Pixmap> pixmap;
 901         std::map<string,Glib::RefPtr<Gdk::Pixmap> >::iterator i = metric_pixmaps.find (meter_metric_area.get_name());
 902
 903         if (i == metric_pixmaps.end() || style_changed || dpi_changed) {
 904                 pixmap = render_metrics (meter_metric_area);
 905         } else {
 906                 pixmap = i->second;
 907         }
 908
 909         gdk_rectangle_intersect (&ev->area, &base_rect, &draw_rect);
 910         win->draw_drawable (bg_gc, pixmap, draw_rect.x, draw_rect.y, draw_rect.x, draw_rect.y, draw_rect.width, draw_rect.height);
 911         style_changed = false;
 912         return true;
 913 }
 914
 915 boost::shared_ptr<PBD::Controllable>
 916 GainMeterBase::get_controllable()
 917 {
 918         return _gain_control;
 919 }
 920
 921