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