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 <gtkmm2ext/utils.h>
  30 #include <gtkmm2ext/fastmeter.h>
  31 #include <gtkmm2ext/stop_signal.h>
  32 #include <gtkmm2ext/barcontroller.h>
  33 #include <midi++/manager.h>
  34 #include <pbd/fastlog.h>
  35
  36 #include "ardour_ui.h"
  37 #include "gain_meter.h"
  38 #include "utils.h"
  39 #include "logmeter.h"
  40 #include "gui_thread.h"
  41 #include "keyboard.h"
  42 #include "public_editor.h"
  43
  44 #include <ardour/session.h>
  45 #include <ardour/route.h>
  46
  47 #include "i18n.h"
  48
  49 using namespace ARDOUR;
  50 using namespace PBD;
  51 using namespace Gtkmm2ext;
  52 using namespace Gtk;
  53 using namespace sigc;
  54 using namespace std;
  55
  56 sigc::signal<void> GainMeterBase::ResetAllPeakDisplays;
  57 sigc::signal<void,RouteGroup*> GainMeterBase::ResetGroupPeakDisplays;
  58
  59 map<string,Glib::RefPtr<Gdk::Pixmap> > GainMeter::metric_pixmaps;
  60 Glib::RefPtr<Gdk::Pixbuf> GainMeter::slider;
  61
  62
  63 void
  64 GainMeter::setup_slider_pix ()
  65 {
  66         if ((slider = ::get_icon ("fader_belt")) == 0) {
  67                 throw failed_constructor();
  68         }
  69 }
  70
  71 GainMeterBase::GainMeterBase (Session& s,
  72                               const Glib::RefPtr<Gdk::Pixbuf>& pix,
  73                               bool horizontal)
  74         : _session (s),
  75           // 0.781787 is the value needed for gain to be set to 0.
  76           gain_adjustment (0.781787, 0.0, 1.0, 0.01, 0.1),
  77           gain_automation_style_button (""),
  78           gain_automation_state_button ("")
  79
  80 {
  81         using namespace Menu_Helpers;
  82
  83         ignore_toggle = false;
  84         meter_menu = 0;
  85         next_release_selects = false;
  86         style_changed = true;
  87         _width = Wide;
  88
  89         if (horizontal) {
  90                 gain_slider = manage (new HSliderController (pix,
  91                                                              &gain_adjustment,
  92                                                              false));
  93         } else {
  94                 gain_slider = manage (new VSliderController (pix,
  95                                                              &gain_adjustment,
  96                                                              false));
  97         }
  98
  99         level_meter = new LevelMeter(_session);
 100
 101         gain_slider->signal_button_press_event().connect (mem_fun(*this, &GainMeter::start_gain_touch));
 102         gain_slider->signal_button_release_event().connect (mem_fun(*this, &GainMeter::end_gain_touch));
 103         gain_slider->set_name ("GainFader");
 104
 105         gain_display.set_name ("MixerStripGainDisplay");
 106         gain_display.set_has_frame (false);
 107         set_size_request_to_display_given_text (gain_display, "-80.g", 2, 6); /* note the descender */
 108         gain_display.signal_activate().connect (mem_fun (*this, &GainMeter::gain_activated));
 109         gain_display.signal_focus_in_event().connect (mem_fun (*this, &GainMeter::gain_focused), false);
 110         gain_display.signal_focus_out_event().connect (mem_fun (*this, &GainMeter::gain_focused), false);
 111
 112         peak_display.set_name ("MixerStripPeakDisplay");
 113 //      peak_display.set_has_frame (false);
 114 //      peak_display.set_editable (false);
 115         set_size_request_to_display_given_text  (peak_display, "-80.g", 2, 6); /* note the descender */
 116         max_peak = minus_infinity();
 117         peak_display.set_label (_("-inf"));
 118         peak_display.unset_flags (Gtk::CAN_FOCUS);
 119
 120         gain_automation_style_button.set_name ("MixerAutomationModeButton");
 121         gain_automation_state_button.set_name ("MixerAutomationPlaybackButton");
 122
 123         ARDOUR_UI::instance()->tooltips().set_tip (gain_automation_state_button, _("Fader automation mode"));
 124         ARDOUR_UI::instance()->tooltips().set_tip (gain_automation_style_button, _("Fader automation type"));
 125
 126         gain_automation_style_button.unset_flags (Gtk::CAN_FOCUS);
 127         gain_automation_state_button.unset_flags (Gtk::CAN_FOCUS);
 128
 129         gain_automation_state_button.set_size_request(15, 15);
 130         gain_automation_style_button.set_size_request(15, 15);
 131
 132         gain_astyle_menu.items().push_back (MenuElem (_("Trim")));
 133         gain_astyle_menu.items().push_back (MenuElem (_("Abs")));
 134
 135         gain_astate_menu.set_name ("ArdourContextMenu");
 136         gain_astyle_menu.set_name ("ArdourContextMenu");
 137
 138         gain_adjustment.signal_value_changed().connect (mem_fun(*this, &GainMeterBase::gain_adjusted));
 139         peak_display.signal_button_release_event().connect (mem_fun(*this, &GainMeterBase::peak_button_release), false);
 140         gain_display.signal_key_press_event().connect (mem_fun(*this, &GainMeterBase::gain_key_press), false);
 141
 142         ResetAllPeakDisplays.connect (mem_fun(*this, &GainMeterBase::reset_peak_display));
 143         ResetGroupPeakDisplays.connect (mem_fun(*this, &GainMeterBase::reset_group_peak_display));
 144
 145         UI::instance()->theme_changed.connect (mem_fun(*this, &GainMeterBase::on_theme_changed));
 146         ColorsChanged.connect (bind(mem_fun (*this, &GainMeterBase::color_handler), false));
 147         DPIReset.connect (bind(mem_fun (*this, &GainMeterBase::color_handler), true));
 148
 149 }
 150
 151 GainMeterBase::~GainMeterBase ()
 152 {
 153         if (meter_menu) {
 154                 delete meter_menu;
 155         }
 156
 157         if (level_meter) {
 158                 delete level_meter;
 159         }
 160 }
 161
 162 void
 163 GainMeterBase::set_io (boost::shared_ptr<IO> io)
 164 {
 165         connections.clear ();
 166
 167         _io = io;
 168
 169         level_meter->set_io (_io);
 170         gain_slider->set_controllable (&_io->gain_control());
 171
 172         boost::shared_ptr<Route> r;
 173
 174         if ((r = boost::dynamic_pointer_cast<Route> (_io)) != 0) {
 175
 176                 if (!r->hidden()) {
 177
 178                         using namespace Menu_Helpers;
 179
 180                         gain_astate_menu.items().clear ();
 181
 182                         gain_astate_menu.items().push_back (MenuElem (_("Manual"),
 183                                                                       bind (mem_fun (*_io, &IO::set_gain_automation_state), (AutoState) Off)));
 184                         gain_astate_menu.items().push_back (MenuElem (_("Play"),
 185                                                                       bind (mem_fun (*_io, &IO::set_gain_automation_state), (AutoState) Play)));
 186                         gain_astate_menu.items().push_back (MenuElem (_("Write"),
 187                                                                       bind (mem_fun (*_io, &IO::set_gain_automation_state), (AutoState) Write)));
 188                         gain_astate_menu.items().push_back (MenuElem (_("Touch"),
 189                                                                       bind (mem_fun (*_io, &IO::set_gain_automation_state), (AutoState) Touch)));
 190
 191                         connections.push_back (gain_automation_style_button.signal_button_press_event().connect (mem_fun(*this, &GainMeterBase::gain_automation_style_button_event), false));
 192                         connections.push_back (gain_automation_state_button.signal_button_press_event().connect (mem_fun(*this, &GainMeterBase::gain_automation_state_button_event), false));
 193
 194                         connections.push_back (r->gain_automation_curve().automation_state_changed.connect (mem_fun(*this, &GainMeterBase::gain_automation_state_changed)));
 195                         connections.push_back (r->gain_automation_curve().automation_style_changed.connect (mem_fun(*this, &GainMeterBase::gain_automation_style_changed)));
 196
 197                         gain_automation_state_changed ();
 198                 }
 199         }
 200
 201         connections.push_back (_io->gain_changed.connect (mem_fun(*this, &GainMeterBase::gain_changed)));
 202
 203         gain_changed (0);
 204         show_gain ();
 205
 206         update_gain_sensitive ();
 207 }
 208
 209 void
 210 GainMeterBase::hide_all_meters ()
 211 {
 212         level_meter->hide_meters();
 213 }
 214
 215 void
 216 GainMeter::hide_all_meters ()
 217 {
 218         bool remove_metric_area = false;
 219
 220         GainMeterBase::hide_all_meters ();
 221
 222         if (remove_metric_area) {
 223                 if (meter_metric_area.get_parent()) {
 224                         level_meter->remove (meter_metric_area);
 225                 }
 226         }
 227 }
 228
 229 void
 230 GainMeterBase::setup_meters (int len)
 231 {
 232         level_meter->setup_meters(len, 5);
 233 }
 234
 235 void
 236 GainMeter::setup_meters (int len)
 237 {
 238         if (!meter_metric_area.get_parent()) {
 239                 level_meter->pack_end (meter_metric_area, false, false);
 240                 meter_metric_area.show_all ();
 241         }
 242         GainMeterBase::setup_meters (len);
 243 }
 244
 245 bool
 246 GainMeterBase::gain_key_press (GdkEventKey* ev)
 247 {
 248         if (key_is_legal_for_numeric_entry (ev->keyval)) {
 249                 /* drop through to normal handling */
 250                 return false;
 251         }
 252         /* illegal key for gain entry */
 253         return true;
 254 }
 255
 256 bool
 257 GainMeterBase::peak_button_release (GdkEventButton* ev)
 258 {
 259         /* reset peak label */
 260
 261         if (ev->button == 1 && Keyboard::modifier_state_equals (ev->state, Keyboard::PrimaryModifier|Keyboard::TertiaryModifier)) {
 262                 ResetAllPeakDisplays ();
 263         } else if (ev->button == 1 && Keyboard::modifier_state_equals (ev->state, Keyboard::PrimaryModifier)) {
 264                 boost::shared_ptr<Route> r;
 265
 266                 if ((r = boost::dynamic_pointer_cast<Route> (_io)) != 0) {
 267                         ResetGroupPeakDisplays (r->mix_group());
 268                 }
 269         } else {
 270                 reset_peak_display ();
 271         }
 272
 273         return true;
 274 }
 275
 276 void
 277 GainMeterBase::reset_peak_display ()
 278 {
 279         boost::shared_ptr<Route> r;
 280
 281         if ((r = boost::dynamic_pointer_cast<Route> (_io)) != 0) {
 282                 r->reset_max_peak_meters();
 283         }
 284
 285         level_meter->clear_meters();
 286         max_peak = -INFINITY;
 287         peak_display.set_label (_("-Inf"));
 288         peak_display.set_name ("MixerStripPeakDisplay");
 289 }
 290
 291 void
 292 GainMeterBase::reset_group_peak_display (RouteGroup* group)
 293 {
 294         boost::shared_ptr<Route> r;
 295
 296         if ((r = boost::dynamic_pointer_cast<Route> (_io)) != 0) {
 297                 if (group == r->mix_group()) {
 298                         reset_peak_display ();
 299                 }
 300         }
 301 }
 302
 303 void
 304 GainMeterBase::popup_meter_menu (GdkEventButton *ev)
 305 {
 306         using namespace Menu_Helpers;
 307
 308         if (meter_menu == 0) {
 309                 meter_menu = new Gtk::Menu;
 310                 MenuList& items = meter_menu->items();
 311
 312                 items.push_back (MenuElem ("-inf .. +0dBFS"));
 313                 items.push_back (MenuElem ("-10dB .. +0dBFS"));
 314                 items.push_back (MenuElem ("-4 .. +0dBFS"));
 315                 items.push_back (SeparatorElem());
 316                 items.push_back (MenuElem ("-inf .. -2dBFS"));
 317                 items.push_back (MenuElem ("-10dB .. -2dBFS"));
 318                 items.push_back (MenuElem ("-4 .. -2dBFS"));
 319         }
 320
 321         meter_menu->popup (1, ev->time);
 322 }
 323
 324 bool
 325 GainMeterBase::gain_focused (GdkEventFocus* ev)
 326 {
 327         if (ev->in) {
 328                 gain_display.select_region (0, -1);
 329         } else {
 330                 gain_display.select_region (0, 0);
 331         }
 332         return false;
 333 }
 334
 335 void
 336 GainMeterBase::gain_activated ()
 337 {
 338         float f;
 339
 340         if (sscanf (gain_display.get_text().c_str(), "%f", &f) == 1) {
 341
 342                 /* clamp to displayable values */
 343
 344                 f = min (f, 6.0f);
 345
 346                 _io->set_gain (dB_to_coefficient(f), this);
 347
 348                 if (gain_display.has_focus()) {
 349                         PublicEditor::instance().reset_focus();
 350                 }
 351         }
 352 }
 353
 354 void
 355 GainMeterBase::show_gain ()
 356 {
 357         char buf[32];
 358
 359         float v = gain_adjustment.get_value();
 360
 361         if (v == 0.0) {
 362                 strcpy (buf, _("-inf"));
 363         } else {
 364                 snprintf (buf, 32, "%.1f", accurate_coefficient_to_dB (slider_position_to_gain (v)));
 365         }
 366
 367         gain_display.set_text (buf);
 368 }
 369
 370 void
 371 GainMeterBase::gain_adjusted ()
 372 {
 373         if (!ignore_toggle) {
 374                 _io->set_gain (slider_position_to_gain (gain_adjustment.get_value()), this);
 375         }
 376         show_gain ();
 377 }
 378
 379 void
 380 GainMeterBase::effective_gain_display ()
 381 {
 382         gfloat value = gain_to_slider_position (_io->effective_gain());
 383
 384         if (gain_adjustment.get_value() != value) {
 385                 ignore_toggle = true;
 386                 gain_adjustment.set_value (value);
 387                 ignore_toggle = false;
 388         }
 389 }
 390
 391 void
 392 GainMeterBase::gain_changed (void *src)
 393 {
 394         Gtkmm2ext::UI::instance()->call_slot (mem_fun(*this, &GainMeterBase::effective_gain_display));
 395 }
 396
 397 void
 398 GainMeterBase::set_meter_strip_name (const char * name)
 399 {
 400         meter_metric_area.set_name (name);
 401         style_changed = true;
 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 (!(_io->gain_automation_state() & Play));
 414 }
 415
 416
 417 static MeterPoint
 418 next_meter_point (MeterPoint mp)
 419 {
 420         switch (mp) {
 421         case MeterInput:
 422                 return MeterPreFader;
 423                 break;
 424
 425         case MeterPreFader:
 426                 return MeterPostFader;
 427                 break;
 428
 429         case MeterPostFader:
 430                 return MeterInput;
 431                 break;
 432         }
 433         /*NOTREACHED*/
 434         return MeterInput;
 435 }
 436
 437 gint
 438 GainMeterBase::meter_press(GdkEventButton* ev)
 439 {
 440         boost::shared_ptr<Route> _route;
 441
 442         wait_for_release = false;
 443
 444         if ((_route = boost::dynamic_pointer_cast<Route>(_io)) == 0) {
 445                 return FALSE;
 446         }
 447
 448         if (!ignore_toggle) {
 449
 450                 if (Keyboard::is_context_menu_event (ev)) {
 451
 452                         // no menu at this time.
 453
 454                 } else {
 455
 456                         if (Keyboard::is_button2_event(ev)) {
 457
 458                                 // Primary-button2 click is the midi binding click
 459                                 // button2-click is "momentary"
 460
 461                                 if (!Keyboard::modifier_state_equals (ev->state, Keyboard::ModifierMask (Keyboard::PrimaryModifier))) {
 462                                         wait_for_release = true;
 463                                         old_meter_point = _route->meter_point ();
 464                                 }
 465                         }
 466
 467                         if (ev->button == 1 || Keyboard::is_button2_event (ev)) {
 468
 469                                 if (Keyboard::modifier_state_equals (ev->state, Keyboard::ModifierMask (Keyboard::PrimaryModifier|Keyboard::TertiaryModifier))) {
 470
 471                                         /* Primary+Tertiary-click applies change to all routes */
 472
 473                                         _session.begin_reversible_command (_("meter point change"));
 474                                         Session::GlobalMeteringStateCommand *cmd = new Session::GlobalMeteringStateCommand (_session, this);
 475                                         _session.foreach_route (this, &GainMeterBase::set_meter_point, next_meter_point (_route->meter_point()));
 476                                         cmd->mark();
 477                                         _session.add_command (cmd);
 478                                         _session.commit_reversible_command ();
 479
 480
 481                                 } else if (Keyboard::modifier_state_equals (ev->state, Keyboard::PrimaryModifier)) {
 482
 483                                         /* Primary-click: solo mix group.
 484                                            NOTE: Primary-button2 is MIDI learn.
 485                                         */
 486
 487                                         if (ev->button == 1) {
 488                                                 _session.begin_reversible_command (_("meter point change"));
 489                                                 Session::GlobalMeteringStateCommand *cmd = new Session::GlobalMeteringStateCommand (_session, this);
 490                                                 set_mix_group_meter_point (*_route, next_meter_point (_route->meter_point()));
 491                                                 cmd->mark();
 492                                                 _session.add_command (cmd);
 493                                                 _session.commit_reversible_command ();
 494                                         }
 495
 496                                 } else {
 497
 498                                         /* click: change just this route */
 499
 500                                         // XXX no undo yet
 501
 502                                         _route->set_meter_point (next_meter_point (_route->meter_point()), this);
 503                                 }
 504                         }
 505                 }
 506         }
 507
 508         return true;
 509
 510 }
 511
 512 gint
 513 GainMeterBase::meter_release(GdkEventButton* ev)
 514 {
 515         if(!ignore_toggle){
 516                 if (wait_for_release){
 517                         wait_for_release = false;
 518
 519                         boost::shared_ptr<Route> r;
 520
 521                         if ((r = boost::dynamic_pointer_cast<Route>(_io)) != 0) {
 522                                 set_meter_point (*r, old_meter_point);
 523                         }
 524                 }
 525         }
 526
 527         return true;
 528 }
 529
 530 void
 531 GainMeterBase::set_meter_point (Route& route, MeterPoint mp)
 532 {
 533         route.set_meter_point (mp, this);
 534 }
 535
 536 void
 537 GainMeterBase::set_mix_group_meter_point (Route& route, MeterPoint mp)
 538 {
 539         RouteGroup* mix_group;
 540
 541         if((mix_group = route.mix_group()) != 0){
 542                 mix_group->apply (&Route::set_meter_point, mp, this);
 543         } else {
 544                 route.set_meter_point (mp, this);
 545         }
 546 }
 547
 548 void
 549 GainMeterBase::meter_point_clicked ()
 550 {
 551         boost::shared_ptr<Route> r;
 552
 553         if ((r = boost::dynamic_pointer_cast<Route> (_io)) != 0) {
 554                 /* WHAT? */
 555         }
 556 }
 557
 558 gint
 559 GainMeterBase::start_gain_touch (GdkEventButton* ev)
 560 {
 561         _io->start_gain_touch ();
 562         return FALSE;
 563 }
 564
 565 gint
 566 GainMeterBase::end_gain_touch (GdkEventButton* ev)
 567 {
 568         _io->end_gain_touch ();
 569         return FALSE;
 570 }
 571
 572 gint
 573 GainMeterBase::gain_automation_state_button_event (GdkEventButton *ev)
 574 {
 575         if (ev->type == GDK_BUTTON_RELEASE) {
 576                 return TRUE;
 577         }
 578
 579         switch (ev->button) {
 580                 case 1:
 581                         gain_astate_menu.popup (1, ev->time);
 582                         break;
 583                 default:
 584                         break;
 585         }
 586
 587         return TRUE;
 588 }
 589
 590 gint
 591 GainMeterBase::gain_automation_style_button_event (GdkEventButton *ev)
 592 {
 593         if (ev->type == GDK_BUTTON_RELEASE) {
 594                 return TRUE;
 595         }
 596
 597         switch (ev->button) {
 598         case 1:
 599                 gain_astyle_menu.popup (1, ev->time);
 600                 break;
 601         default:
 602                 break;
 603         }
 604         return TRUE;
 605 }
 606
 607 string
 608 GainMeterBase::astate_string (AutoState state)
 609 {
 610         return _astate_string (state, false);
 611 }
 612
 613 string
 614 GainMeterBase::short_astate_string (AutoState state)
 615 {
 616         return _astate_string (state, true);
 617 }
 618
 619 string
 620 GainMeterBase::_astate_string (AutoState state, bool shrt)
 621 {
 622         string sstr;
 623
 624         switch (state) {
 625         case Off:
 626                 sstr = (shrt ? "M" : _("M"));
 627                 break;
 628         case Play:
 629                 sstr = (shrt ? "P" : _("P"));
 630                 break;
 631         case Touch:
 632                 sstr = (shrt ? "T" : _("T"));
 633                 break;
 634         case Write:
 635                 sstr = (shrt ? "W" : _("W"));
 636                 break;
 637         }
 638
 639         return sstr;
 640 }
 641
 642 string
 643 GainMeterBase::astyle_string (AutoStyle style)
 644 {
 645         return _astyle_string (style, false);
 646 }
 647
 648 string
 649 GainMeterBase::short_astyle_string (AutoStyle style)
 650 {
 651         return _astyle_string (style, true);
 652 }
 653
 654 string
 655 GainMeterBase::_astyle_string (AutoStyle style, bool shrt)
 656 {
 657         if (style & Trim) {
 658                 return _("Trim");
 659         } else {
 660                 /* XXX it might different in different languages */
 661
 662                 return (shrt ? _("Abs") : _("Abs"));
 663         }
 664 }
 665
 666 void
 667 GainMeterBase::gain_automation_style_changed ()
 668 {
 669         switch (_width) {
 670         case Wide:
 671                 gain_automation_style_button.set_label (astyle_string(_io->gain_automation_curve().automation_style()));
 672                 break;
 673         case Narrow:
 674                 gain_automation_style_button.set_label  (short_astyle_string(_io->gain_automation_curve().automation_style()));
 675                 break;
 676         }
 677 }
 678
 679 void
 680 GainMeterBase::gain_automation_state_changed ()
 681 {
 682         ENSURE_GUI_THREAD(mem_fun(*this, &GainMeterBase::gain_automation_state_changed));
 683
 684         bool x;
 685
 686         switch (_width) {
 687         case Wide:
 688                 gain_automation_state_button.set_label (astate_string(_io->gain_automation_curve().automation_state()));
 689                 break;
 690         case Narrow:
 691                 gain_automation_state_button.set_label (short_astate_string(_io->gain_automation_curve().automation_state()));
 692                 break;
 693         }
 694
 695         x = (_io->gain_automation_state() != Off);
 696
 697         if (gain_automation_state_button.get_active() != x) {
 698                 ignore_toggle = true;
 699                 gain_automation_state_button.set_active (x);
 700                 ignore_toggle = false;
 701         }
 702
 703         update_gain_sensitive ();
 704
 705         /* start watching automation so that things move */
 706
 707         gain_watching.disconnect();
 708
 709         if (x) {
 710                 gain_watching = ARDOUR_UI::RapidScreenUpdate.connect (mem_fun (*this, &GainMeterBase::effective_gain_display));
 711         }
 712 }
 713
 714 void
 715 GainMeterBase::update_meters()
 716 {
 717         char buf[32];
 718         float mpeak = level_meter->update_meters();
 719
 720         if (mpeak > max_peak) {
 721                 max_peak = mpeak;
 722                 if (mpeak <= -200.0f) {
 723                         peak_display.set_label (_("-inf"));
 724                 } else {
 725                         snprintf (buf, sizeof(buf), "%.1f", mpeak);
 726                         peak_display.set_label (buf);
 727                 }
 728
 729                 if (mpeak >= 0.0f) {
 730                         peak_display.set_name ("MixerStripPeakDisplayPeak");
 731                 }
 732         }
 733 }
 734
 735 void GainMeterBase::color_handler(bool dpi)
 736 {
 737         color_changed = true;
 738         dpi_changed = (dpi) ? true : false;
 739         setup_meters();
 740 }
 741
 742 void
 743 GainMeterBase::set_width (Width w, int len)
 744 {
 745         _width = w;
 746         level_meter->setup_meters (len);
 747 }
 748
 749
 750 void
 751 GainMeterBase::on_theme_changed()
 752 {
 753         style_changed = true;
 754 }
 755
 756 GainMeter::GainMeter (Session& s)
 757         : GainMeterBase (s, slider, false)
 758 {
 759         gain_display_box.set_homogeneous (true);
 760         gain_display_box.set_spacing (2);
 761         gain_display_box.pack_start (gain_display, true, true);
 762
 763         meter_metric_area.set_name ("AudioTrackMetrics");
 764         set_size_request_to_display_given_text (meter_metric_area, "-50", 0, 0);
 765
 766         gain_automation_style_button.set_name ("MixerAutomationModeButton");
 767         gain_automation_state_button.set_name ("MixerAutomationPlaybackButton");
 768
 769         ARDOUR_UI::instance()->tooltips().set_tip (gain_automation_state_button, _("Fader automation mode"));
 770         ARDOUR_UI::instance()->tooltips().set_tip (gain_automation_style_button, _("Fader automation type"));
 771
 772         gain_automation_style_button.unset_flags (Gtk::CAN_FOCUS);
 773         gain_automation_state_button.unset_flags (Gtk::CAN_FOCUS);
 774
 775         gain_automation_state_button.set_size_request(15, 15);
 776         gain_automation_style_button.set_size_request(15, 15);
 777
 778         HBox* fader_centering_box = manage (new HBox);
 779         fader_centering_box->pack_start (*gain_slider, true, false);
 780
 781         fader_vbox = manage (new Gtk::VBox());
 782         fader_vbox->set_spacing (0);
 783         fader_vbox->pack_start (*fader_centering_box, false, false, 0);
 784
 785         hbox.set_spacing (2);
 786         hbox.pack_start (*fader_vbox, true, true);
 787
 788         set_spacing (2);
 789
 790         pack_start (gain_display_box, Gtk::PACK_SHRINK);
 791         pack_start (hbox, Gtk::PACK_SHRINK);
 792
 793         meter_metric_area.signal_expose_event().connect (mem_fun(*this, &GainMeter::meter_metrics_expose));
 794 }
 795
 796 void
 797 GainMeter::set_io (boost::shared_ptr<IO> io)
 798 {
 799         if (level_meter->get_parent()) {
 800                 hbox.remove (*level_meter);
 801         }
 802
 803         if (peak_display.get_parent()) {
 804                 gain_display_box.remove (peak_display);
 805         }
 806
 807         if (gain_automation_state_button.get_parent()) {
 808                 fader_vbox->remove (gain_automation_state_button);
 809         }
 810
 811         GainMeterBase::set_io (io);
 812
 813         boost::shared_ptr<Route> r;
 814
 815         if ((r = boost::dynamic_pointer_cast<Route> (_io)) != 0) {
 816
 817                 /*
 818                    if we have a non-hidden route (ie. we're not the click or the auditioner),
 819                    pack some route-dependent stuff.
 820                 */
 821
 822                 gain_display_box.pack_end (peak_display, true, true);
 823                 hbox.pack_end (*level_meter, true, true);
 824
 825                 if (!r->hidden()) {
 826                         fader_vbox->pack_start (gain_automation_state_button, false, false, 0);
 827                 }
 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