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->mix_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->mix_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         //cerr << this << " for " << _io->name() << " GAIN ADJUSTED\n";
 375         if (!ignore_toggle) {
 376                 //cerr << "Set GC\n";
 377                 _gain_control->set_value (slider_position_to_gain (gain_adjustment.get_value()));
 378                 //cerr << "Set GC OUT\n";
 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         boost::shared_ptr<Route> _route;
 449
 450         wait_for_release = false;
 451
 452         if (!_route) {
 453                 return FALSE;
 454         }
 455
 456         if (!ignore_toggle) {
 457
 458                 if (Keyboard::is_context_menu_event (ev)) {
 459
 460                         // no menu at this time.
 461
 462                 } else {
 463
 464                         if (Keyboard::is_button2_event(ev)) {
 465
 466                                 // Primary-button2 click is the midi binding click
 467                                 // button2-click is "momentary"
 468
 469                                 if (!Keyboard::modifier_state_equals (ev->state, Keyboard::ModifierMask (Keyboard::PrimaryModifier))) {
 470                                         wait_for_release = true;
 471                                         old_meter_point = _route->meter_point ();
 472                                 }
 473                         }
 474
 475                         if (_route && (ev->button == 1 || Keyboard::is_button2_event (ev))) {
 476
 477                                 if (Keyboard::modifier_state_equals (ev->state, Keyboard::ModifierMask (Keyboard::PrimaryModifier|Keyboard::TertiaryModifier))) {
 478
 479                                         /* Primary+Tertiary-click applies change to all routes */
 480
 481                                         _session.begin_reversible_command (_("meter point change"));
 482                                         Session::GlobalMeteringStateCommand *cmd = new Session::GlobalMeteringStateCommand (_session, this);
 483                                         _session.foreach_route (this, &GainMeterBase::set_meter_point, next_meter_point (_route->meter_point()));
 484                                         cmd->mark();
 485                                         _session.add_command (cmd);
 486                                         _session.commit_reversible_command ();
 487
 488
 489                                 } else if (Keyboard::modifier_state_equals (ev->state, Keyboard::PrimaryModifier)) {
 490
 491                                         /* Primary-click: solo mix group.
 492                                            NOTE: Primary-button2 is MIDI learn.
 493                                         */
 494
 495                                         if (ev->button == 1) {
 496                                                 _session.begin_reversible_command (_("meter point change"));
 497                                                 Session::GlobalMeteringStateCommand *cmd = new Session::GlobalMeteringStateCommand (_session, this);
 498                                                 set_mix_group_meter_point (*_route, next_meter_point (_route->meter_point()));
 499                                                 cmd->mark();
 500                                                 _session.add_command (cmd);
 501                                                 _session.commit_reversible_command ();
 502                                         }
 503
 504                                 } else {
 505
 506                                         /* click: change just this route */
 507
 508                                         // XXX no undo yet
 509
 510                                         _route->set_meter_point (next_meter_point (_route->meter_point()), this);
 511                                 }
 512                         }
 513                 }
 514         }
 515
 516         return true;
 517
 518 }
 519
 520 gint
 521 GainMeterBase::meter_release(GdkEventButton* ev)
 522 {
 523         if(!ignore_toggle){
 524                 if (wait_for_release){
 525                         wait_for_release = false;
 526
 527                         if (_route) {
 528                                 set_meter_point (*_route, old_meter_point);
 529                         }
 530                 }
 531         }
 532
 533         return true;
 534 }
 535
 536 void
 537 GainMeterBase::set_meter_point (Route& route, MeterPoint mp)
 538 {
 539         route.set_meter_point (mp, this);
 540 }
 541
 542 void
 543 GainMeterBase::set_mix_group_meter_point (Route& route, MeterPoint mp)
 544 {
 545         RouteGroup* mix_group;
 546
 547         if((mix_group = route.mix_group()) != 0){
 548                 mix_group->apply (&Route::set_meter_point, mp, this);
 549         } else {
 550                 route.set_meter_point (mp, this);
 551         }
 552 }
 553
 554 void
 555 GainMeterBase::meter_point_clicked ()
 556 {
 557         if (_route) {
 558                 /* WHAT? */
 559         }
 560 }
 561
 562 gint
 563 GainMeterBase::start_gain_touch (GdkEventButton* ev)
 564 {
 565         _gain_control->start_touch ();
 566         return FALSE;
 567 }
 568
 569 gint
 570 GainMeterBase::end_gain_touch (GdkEventButton* ev)
 571 {
 572         _gain_control->stop_touch ();
 573         return FALSE;
 574 }
 575
 576 gint
 577 GainMeterBase::gain_automation_state_button_event (GdkEventButton *ev)
 578 {
 579         if (ev->type == GDK_BUTTON_RELEASE) {
 580                 return TRUE;
 581         }
 582
 583         switch (ev->button) {
 584                 case 1:
 585                         gain_astate_menu.popup (1, ev->time);
 586                         break;
 587                 default:
 588                         break;
 589         }
 590
 591         return TRUE;
 592 }
 593
 594 gint
 595 GainMeterBase::gain_automation_style_button_event (GdkEventButton *ev)
 596 {
 597         if (ev->type == GDK_BUTTON_RELEASE) {
 598                 return TRUE;
 599         }
 600
 601         switch (ev->button) {
 602         case 1:
 603                 gain_astyle_menu.popup (1, ev->time);
 604                 break;
 605         default:
 606                 break;
 607         }
 608         return TRUE;
 609 }
 610
 611 string
 612 GainMeterBase::astate_string (AutoState state)
 613 {
 614         return _astate_string (state, false);
 615 }
 616
 617 string
 618 GainMeterBase::short_astate_string (AutoState state)
 619 {
 620         return _astate_string (state, true);
 621 }
 622
 623 string
 624 GainMeterBase::_astate_string (AutoState state, bool shrt)
 625 {
 626         string sstr;
 627
 628         switch (state) {
 629         case Off:
 630                 sstr = (shrt ? "M" : _("M"));
 631                 break;
 632         case Play:
 633                 sstr = (shrt ? "P" : _("P"));
 634                 break;
 635         case Touch:
 636                 sstr = (shrt ? "T" : _("T"));
 637                 break;
 638         case Write:
 639                 sstr = (shrt ? "W" : _("W"));
 640                 break;
 641         }
 642
 643         return sstr;
 644 }
 645
 646 string
 647 GainMeterBase::astyle_string (AutoStyle style)
 648 {
 649         return _astyle_string (style, false);
 650 }
 651
 652 string
 653 GainMeterBase::short_astyle_string (AutoStyle style)
 654 {
 655         return _astyle_string (style, true);
 656 }
 657
 658 string
 659 GainMeterBase::_astyle_string (AutoStyle style, bool shrt)
 660 {
 661         if (style & Trim) {
 662                 return _("Trim");
 663         } else {
 664                 /* XXX it might different in different languages */
 665
 666                 return (shrt ? _("Abs") : _("Abs"));
 667         }
 668 }
 669
 670 void
 671 GainMeterBase::gain_automation_style_changed ()
 672 {
 673         switch (_width) {
 674         case Wide:
 675                 gain_automation_style_button.set_label (astyle_string(_gain_control->alist()->automation_style()));
 676                 break;
 677         case Narrow:
 678                 gain_automation_style_button.set_label  (short_astyle_string(_gain_control->alist()->automation_style()));
 679                 break;
 680         }
 681 }
 682
 683 void
 684 GainMeterBase::gain_automation_state_changed ()
 685 {
 686         ENSURE_GUI_THREAD(mem_fun(*this, &GainMeterBase::gain_automation_state_changed));
 687
 688         bool x;
 689
 690         switch (_width) {
 691         case Wide:
 692                 gain_automation_state_button.set_label (astate_string(_gain_control->alist()->automation_state()));
 693                 break;
 694         case Narrow:
 695                 gain_automation_state_button.set_label (short_astate_string(_gain_control->alist()->automation_state()));
 696                 break;
 697         }
 698
 699         x = (_gain_control->alist()->automation_state() != Off);
 700
 701         if (gain_automation_state_button.get_active() != x) {
 702                 ignore_toggle = true;
 703                 gain_automation_state_button.set_active (x);
 704                 ignore_toggle = false;
 705         }
 706
 707         update_gain_sensitive ();
 708
 709         /* start watching automation so that things move */
 710
 711         gain_watching.disconnect();
 712
 713         if (x) {
 714                 gain_watching = ARDOUR_UI::RapidScreenUpdate.connect (mem_fun (*this, &GainMeterBase::effective_gain_display));
 715         }
 716 }
 717
 718 void
 719 GainMeterBase::update_meters()
 720 {
 721         char buf[32];
 722         float mpeak = level_meter->update_meters();
 723
 724         if (mpeak > max_peak) {
 725                 max_peak = mpeak;
 726                 if (mpeak <= -200.0f) {
 727                         peak_display.set_label (_("-inf"));
 728                 } else {
 729                         snprintf (buf, sizeof(buf), "%.1f", mpeak);
 730                         peak_display.set_label (buf);
 731                 }
 732
 733                 if (mpeak >= 0.0f) {
 734                         peak_display.set_name ("MixerStripPeakDisplayPeak");
 735                 }
 736         }
 737 }
 738
 739 void GainMeterBase::color_handler(bool dpi)
 740 {
 741         color_changed = true;
 742         dpi_changed = (dpi) ? true : false;
 743         setup_meters();
 744 }
 745
 746 void
 747 GainMeterBase::set_width (Width w, int len)
 748 {
 749         _width = w;
 750         level_meter->setup_meters (len);
 751 }
 752
 753
 754 void
 755 GainMeterBase::on_theme_changed()
 756 {
 757         style_changed = true;
 758 }
 759
 760 GainMeter::GainMeter (Session& s)
 761         : GainMeterBase (s, slider, false)
 762 {
 763         gain_display_box.set_homogeneous (true);
 764         gain_display_box.set_spacing (2);
 765         gain_display_box.pack_start (gain_display, true, true);
 766
 767         meter_metric_area.set_name ("AudioTrackMetrics");
 768         set_size_request_to_display_given_text (meter_metric_area, "-50", 0, 0);
 769
 770         gain_automation_style_button.set_name ("MixerAutomationModeButton");
 771         gain_automation_state_button.set_name ("MixerAutomationPlaybackButton");
 772
 773         ARDOUR_UI::instance()->tooltips().set_tip (gain_automation_state_button, _("Fader automation mode"));
 774         ARDOUR_UI::instance()->tooltips().set_tip (gain_automation_style_button, _("Fader automation type"));
 775
 776         gain_automation_style_button.unset_flags (Gtk::CAN_FOCUS);
 777         gain_automation_state_button.unset_flags (Gtk::CAN_FOCUS);
 778
 779         gain_automation_state_button.set_size_request(15, 15);
 780         gain_automation_style_button.set_size_request(15, 15);
 781
 782         HBox* fader_centering_box = manage (new HBox);
 783         fader_centering_box->pack_start (*gain_slider, true, false);
 784
 785         fader_vbox = manage (new Gtk::VBox());
 786         fader_vbox->set_spacing (0);
 787         fader_vbox->pack_start (*fader_centering_box, false, false, 0);
 788
 789         hbox.set_spacing (2);
 790         hbox.pack_start (*fader_vbox, true, true);
 791
 792         set_spacing (2);
 793
 794         pack_start (gain_display_box, Gtk::PACK_SHRINK);
 795         pack_start (hbox, Gtk::PACK_SHRINK);
 796
 797         meter_metric_area.signal_expose_event().connect (mem_fun(*this, &GainMeter::meter_metrics_expose));
 798 }
 799
 800 void
 801 GainMeter::set_controls (boost::shared_ptr<Route> r,
 802                          boost::shared_ptr<PeakMeter> meter,
 803                          boost::shared_ptr<AutomationControl> gain_control,
 804                          boost::shared_ptr<Automatable> gc_owner)
 805 {
 806         if (level_meter->get_parent()) {
 807                 hbox.remove (*level_meter);
 808         }
 809
 810         if (peak_display.get_parent()) {
 811                 gain_display_box.remove (peak_display);
 812         }
 813
 814         if (gain_automation_state_button.get_parent()) {
 815                 fader_vbox->remove (gain_automation_state_button);
 816         }
 817
 818         GainMeterBase::set_controls (r, meter, gain_control, gc_owner);
 819
 820         /*
 821            if we have a non-hidden route (ie. we're not the click or the auditioner),
 822            pack some route-dependent stuff.
 823         */
 824
 825         gain_display_box.pack_end (peak_display, true, true);
 826         hbox.pack_end (*level_meter, true, true);
 827
 828         if (!r->is_hidden()) {
 829                 fader_vbox->pack_start (gain_automation_state_button, false, false, 0);
 830         }
 831 }
 832
 833 int
 834 GainMeter::get_gm_width ()
 835 {
 836         Gtk::Requisition sz;
 837         hbox.size_request (sz);
 838         return sz.width;
 839 }
 840
 841 Glib::RefPtr<Gdk::Pixmap>
 842 GainMeter::render_metrics (Gtk::Widget& w)
 843 {
 844         Glib::RefPtr<Gdk::Window> win (w.get_window());
 845         Glib::RefPtr<Gdk::GC> fg_gc (w.get_style()->get_fg_gc (Gtk::STATE_NORMAL));
 846         Glib::RefPtr<Gdk::GC> bg_gc (w.get_style()->get_bg_gc (Gtk::STATE_NORMAL));
 847         gint width, height;
 848         int  db_points[] = { -50, -40, -20, -30, -10, -3, 0, 4 };
 849         char buf[32];
 850
 851         win->get_size (width, height);
 852
 853         Glib::RefPtr<Gdk::Pixmap> pixmap = Gdk::Pixmap::create (win, width, height);
 854
 855         metric_pixmaps[w.get_name()] = pixmap;
 856
 857         pixmap->draw_rectangle (bg_gc, true, 0, 0, width, height);
 858
 859         Glib::RefPtr<Pango::Layout> layout = w.create_pango_layout("");
 860
 861         for (uint32_t i = 0; i < sizeof (db_points)/sizeof (db_points[0]); ++i) {
 862
 863                 float fraction = log_meter (db_points[i]);
 864                 gint pos = height - (gint) floor (height * fraction);
 865
 866                 snprintf (buf, sizeof (buf), "%d", abs (db_points[i]));
 867
 868                 layout->set_text (buf);
 869
 870                 /* we want logical extents, not ink extents here */
 871
 872                 int width, height;
 873                 layout->get_pixel_size (width, height);
 874
 875                 pixmap->draw_line (fg_gc, 0, pos, 4, pos);
 876                 pixmap->draw_layout (fg_gc, 6, pos - (height/2), layout);
 877         }
 878
 879         return pixmap;
 880 }
 881
 882 gint
 883 GainMeter::meter_metrics_expose (GdkEventExpose *ev)
 884 {
 885         static Glib::RefPtr<Gtk::Style> meter_style;
 886         if (style_changed) {
 887                 meter_style = meter_metric_area.get_style();
 888         }
 889         Glib::RefPtr<Gdk::Window> win (meter_metric_area.get_window());
 890         Glib::RefPtr<Gdk::GC> bg_gc (meter_style->get_bg_gc (Gtk::STATE_INSENSITIVE));
 891         GdkRectangle base_rect;
 892         GdkRectangle draw_rect;
 893         gint width, height;
 894
 895         win->get_size (width, height);
 896
 897         base_rect.width = width;
 898         base_rect.height = height;
 899         base_rect.x = 0;
 900         base_rect.y = 0;
 901
 902         Glib::RefPtr<Gdk::Pixmap> pixmap;
 903         std::map<string,Glib::RefPtr<Gdk::Pixmap> >::iterator i = metric_pixmaps.find (meter_metric_area.get_name());
 904
 905         if (i == metric_pixmaps.end() || style_changed || dpi_changed) {
 906                 pixmap = render_metrics (meter_metric_area);
 907         } else {
 908                 pixmap = i->second;
 909         }
 910
 911         gdk_rectangle_intersect (&ev->area, &base_rect, &draw_rect);
 912         win->draw_drawable (bg_gc, pixmap, draw_rect.x, draw_rect.y, draw_rect.x, draw_rect.y, draw_rect.width, draw_rect.height);
 913         style_changed = false;
 914         return true;
 915 }
 916
 917 boost::shared_ptr<PBD::Controllable>
 918 GainMeterBase::get_controllable()
 919 {
 920         return _gain_control;
 921 }
 922
 923