gtk2_ardour/meter_strip.cc

   1 /*
   2     Copyright (C) 2013 Paul Davis
   3     Author: Robin Gareus
   4
   5     This program is free software; you can redistribute it and/or modify
   6     it under the terms of the GNU General Public License as published by
   7     the Free Software Foundation; either version 2 of the License, or
   8     (at your option) any later version.
   9
  10     This program is distributed in the hope that it will be useful,
  11     but WITHOUT ANY WARRANTY; without even the implied warranty of
  12     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13     GNU General Public License for more details.
  14
  15     You should have received a copy of the GNU General Public License
  16     along with this program; if not, write to the Free Software
  17     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  18 */
  19
  20 #include <list>
  21
  22 #include <sigc++/bind.h>
  23
  24 #include "ardour/session.h"
  25 #include "ardour/route.h"
  26 #include "ardour/route_group.h"
  27 #include "ardour/meter.h"
  28
  29 #include "ardour/audio_track.h"
  30 #include "ardour/midi_track.h"
  31
  32 #include <gtkmm2ext/gtk_ui.h>
  33 #include <gtkmm2ext/utils.h>
  34
  35 #include "ardour_ui.h"
  36 #include "logmeter.h"
  37 #include "gui_thread.h"
  38 #include "ardour_window.h"
  39
  40 #include "meterbridge.h"
  41 #include "meter_strip.h"
  42
  43 #include "i18n.h"
  44
  45 using namespace ARDOUR;
  46 using namespace PBD;
  47 using namespace Gtk;
  48 using namespace Gtkmm2ext;
  49 using namespace std;
  50
  51 PBD::Signal1<void,MeterStrip*> MeterStrip::CatchDeletion;
  52
  53 MeterStrip::MetricPatterns MeterStrip::metric_patterns;
  54 MeterStrip::TickPatterns MeterStrip::ticks_patterns;
  55
  56 MeterStrip::MeterStrip (Meterbridge& mtr, Session* sess, boost::shared_ptr<ARDOUR::Route> rt)
  57         : AxisView(sess)
  58         , RouteUI(sess)
  59         , _route(rt)
  60         , style_changed (false)
  61 {
  62         set_spacing(2);
  63         RouteUI::set_route (rt);
  64
  65         int meter_width = 6;
  66         if (_route->shared_peak_meter()->input_streams().n_total() == 1) {
  67                 meter_width = 12;
  68         }
  69
  70         // level meter + ticks
  71         level_meter = new LevelMeter(sess);
  72         level_meter->set_meter (_route->shared_peak_meter().get());
  73         level_meter->clear_meters();
  74         level_meter->setup_meters (350, meter_width, 6);
  75         level_meter->pack_start (meter_metric_area, false, false);
  76
  77         Gtk::Alignment *meter_align = Gtk::manage (new Gtk::Alignment());
  78         meter_align->set(0.5, 0.5, 0.0, 1.0);
  79         meter_align->add(*level_meter);
  80
  81         meterbox.pack_start(meter_ticks1_area, true, false);
  82         meterbox.pack_start(*meter_align, true, true);
  83         meterbox.pack_start(meter_ticks2_area, true, false);
  84
  85         // peak display
  86         peak_display.set_name ("MixerStripPeakDisplay");
  87         set_size_request_to_display_given_text (peak_display, "-80.g", 2, 6);
  88         max_peak = minus_infinity();
  89         peak_display.set_label (_("-inf"));
  90         peak_display.unset_flags (Gtk::CAN_FOCUS);
  91
  92         peakbx.pack_start(peak_display, true, true);
  93         peakbx.set_size_request(-1, 16);
  94
  95         // add track-name label -- TODO ellipsize
  96         label.set_text(_route->name().c_str());
  97         label.set_name("MeterbridgeLabel");
  98         label.set_angle(90.0);
  99         label.set_alignment(0.5, 0.0);
 100         label.set_size_request(12, 36);
 101
 102         // rec-enable button
 103         btnbox.pack_start(*rec_enable_button, true, false);
 104         btnbox.set_size_request(-1, 16);
 105
 106         pack_start (peakbx, false, false);
 107         pack_start (meterbox, true, true);
 108         pack_start (btnbox, false, false);
 109         pack_start (label, false, false);
 110
 111         peak_display.show();
 112         peakbx.show();
 113         meter_ticks1_area.hide();
 114         meter_ticks2_area.show();
 115         meter_metric_area.show();
 116         meterbox.show();
 117         level_meter->show();
 118         meter_align->show();
 119         btnbox.show();
 120         label.show();
 121
 122         _route->shared_peak_meter()->ConfigurationChanged.connect (
 123                         route_connections, invalidator (*this), boost::bind (&MeterStrip::meter_configuration_changed, this, _1), gui_context()
 124                         );
 125         meter_configuration_changed (_route->shared_peak_meter()->input_streams ());
 126
 127         set_size_request_to_display_given_text (meter_metric_area, "-8888", 1, 0);
 128         meter_metric_area.signal_expose_event().connect (
 129                         sigc::mem_fun(*this, &MeterStrip::meter_metrics_expose));
 130
 131         meter_ticks1_area.set_size_request(4,-1);
 132         meter_ticks2_area.set_size_request(4,-1);
 133         meter_ticks1_area.signal_expose_event().connect (sigc::mem_fun(*this, &MeterStrip::meter_ticks1_expose));
 134         meter_ticks2_area.signal_expose_event().connect (sigc::mem_fun(*this, &MeterStrip::meter_ticks2_expose));
 135
 136         _route->DropReferences.connect (route_connections, invalidator (*this), boost::bind (&MeterStrip::self_delete, this), gui_context());
 137         _route->PropertyChanged.connect (route_connections, invalidator (*this), boost::bind (&MeterStrip::strip_property_changed, this, _1), gui_context());
 138
 139         peak_display.signal_button_release_event().connect (sigc::mem_fun(*this, &MeterStrip::peak_button_release), false);
 140
 141         UI::instance()->theme_changed.connect (sigc::mem_fun(*this, &MeterStrip::on_theme_changed));
 142 }
 143
 144 MeterStrip::~MeterStrip ()
 145 {
 146         delete level_meter;
 147         CatchDeletion (this);
 148 }
 149
 150 void
 151 MeterStrip::self_delete ()
 152 {
 153         delete this;
 154 }
 155
 156 void
 157 MeterStrip::update_rec_display ()
 158 {
 159         RouteUI::update_rec_display ();
 160 }
 161
 162 std::string
 163 MeterStrip::state_id() const
 164 {
 165         return string_compose ("mtrs %1", _route->id().to_s());
 166 }
 167
 168 void
 169 MeterStrip::set_button_names()
 170 {
 171         rec_enable_button->set_text (_("R"));
 172 }
 173
 174 void
 175 MeterStrip::strip_property_changed (const PropertyChange& what_changed)
 176 {
 177         if (!what_changed.contains (ARDOUR::Properties::name)) {
 178                 return;
 179         }
 180         ENSURE_GUI_THREAD (*this, &MeterStrip::strip_name_changed, what_changed)
 181         label.set_text(_route->name());
 182 }
 183
 184 void
 185 MeterStrip::fast_update ()
 186 {
 187         char buf[32];
 188         float mpeak = level_meter->update_meters();
 189         if (mpeak > max_peak) {
 190                 max_peak = mpeak;
 191                 if (mpeak <= -200.0f) {
 192                         peak_display.set_label (_("-inf"));
 193                 } else {
 194                         snprintf (buf, sizeof(buf), "%.1f", mpeak);
 195                         peak_display.set_label (buf);
 196                 }
 197
 198                 if (mpeak >= 0.0f) {
 199                         peak_display.set_name ("MixerStripPeakDisplayPeak");
 200                 }
 201         }
 202 }
 203
 204 void
 205 MeterStrip::display_metrics (bool show)
 206 {
 207         if (show) {
 208                 meter_metric_area.show();
 209                 meter_ticks1_area.hide();
 210         } else {
 211                 meter_metric_area.hide();
 212                 meter_ticks1_area.show();
 213         }
 214 }
 215
 216 void
 217 MeterStrip::on_theme_changed()
 218 {
 219         style_changed = true;
 220 }
 221
 222 void
 223 MeterStrip::meter_configuration_changed (ChanCount c)
 224 {
 225         int type = 0;
 226         _types.clear ();
 227
 228         for (DataType::iterator i = DataType::begin(); i != DataType::end(); ++i) {
 229                 if (c.get (*i) > 0) {
 230                         _types.push_back (*i);
 231                         type |= 1 << (*i);
 232                 }
 233         }
 234
 235         // TODO draw Inactive routes or busses with different styles
 236         if (boost::dynamic_pointer_cast<AudioTrack>(_route) == 0
 237                         && boost::dynamic_pointer_cast<MidiTrack>(_route) == 0
 238                         ) {
 239                 meter_metric_area.set_name ("AudioBusMetrics");
 240                 meter_ticks1_area.set_name ("AudioBusMetrics");
 241                 meter_ticks2_area.set_name ("AudioBusMetrics");
 242         }
 243         else if (type == (1 << DataType::AUDIO)) {
 244                 meter_metric_area.set_name ("AudioTrackMetrics");
 245                 meter_ticks1_area.set_name ("AudioTrackMetrics");
 246                 meter_ticks2_area.set_name ("AudioTrackMetrics");
 247         }
 248         else if (type == (1 << DataType::MIDI)) {
 249                 meter_metric_area.set_name ("MidiTrackMetrics");
 250                 meter_ticks1_area.set_name ("MidiTrackMetrics");
 251                 meter_ticks2_area.set_name ("MidiTrackMetrics");
 252         } else {
 253                 meter_metric_area.set_name ("AudioMidiTrackMetrics");
 254                 meter_ticks1_area.set_name ("AudioMidiTrackMetrics");
 255                 meter_ticks2_area.set_name ("AudioMidiTrackMetrics");
 256         }
 257         style_changed = true;
 258         meter_metric_area.queue_draw ();
 259 }
 260
 261 void
 262 MeterStrip::on_size_request (Gtk::Requisition* r)
 263 {
 264         style_changed = true;
 265         VBox::on_size_request(r);
 266 }
 267
 268 void
 269 MeterStrip::on_size_allocate (Gtk::Allocation& a)
 270 {
 271         style_changed = true;
 272         VBox::on_size_allocate(a);
 273 }
 274
 275 /* XXX code-copy from gain_meter.cc -- TODO consolidate
 276  *
 277  * slightly different:
 278  *  - ticks & label positions are swapped
 279  *  - more ticks for audio (longer meter by default)
 280  *  - right-aligned lables, unit-legend
 281  *  - height limitation of FastMeter::max_pattern_metric_size is included here
 282  */
 283 cairo_pattern_t*
 284 MeterStrip::render_metrics (Gtk::Widget& w, vector<DataType> types)
 285 {
 286         Glib::RefPtr<Gdk::Window> win (w.get_window());
 287
 288         gint width, height;
 289         win->get_size (width, height);
 290
 291         cairo_surface_t* surface = cairo_image_surface_create (CAIRO_FORMAT_RGB24, width, height);
 292         cairo_t* cr = cairo_create (surface);
 293         Glib::RefPtr<Pango::Layout> layout = Pango::Layout::create(w.get_pango_context());
 294
 295
 296         Pango::AttrList audio_font_attributes;
 297         Pango::AttrList midi_font_attributes;
 298         Pango::AttrList unit_font_attributes;
 299
 300         Pango::AttrFontDesc* font_attr;
 301         Pango::FontDescription font;
 302
 303         font = Pango::FontDescription (""); // use defaults
 304         //font = get_font_for_style("gain-fader");
 305         //font = w.get_style()->get_font();
 306
 307         font.set_weight (Pango::WEIGHT_NORMAL);
 308         font.set_size (10.0 * PANGO_SCALE);
 309         font_attr = new Pango::AttrFontDesc (Pango::Attribute::create_attr_font_desc (font));
 310         audio_font_attributes.change (*font_attr);
 311         delete font_attr;
 312
 313         font.set_weight (Pango::WEIGHT_ULTRALIGHT);
 314         font.set_stretch (Pango::STRETCH_ULTRA_CONDENSED);
 315         font.set_size (7.5 * PANGO_SCALE);
 316         font_attr = new Pango::AttrFontDesc (Pango::Attribute::create_attr_font_desc (font));
 317         midi_font_attributes.change (*font_attr);
 318         delete font_attr;
 319
 320         font.set_size (7.0 * PANGO_SCALE);
 321         font_attr = new Pango::AttrFontDesc (Pango::Attribute::create_attr_font_desc (font));
 322         unit_font_attributes.change (*font_attr);
 323         delete font_attr;
 324
 325         cairo_move_to (cr, 0, 0);
 326         cairo_rectangle (cr, 0, 0, width, height);
 327         {
 328                 Gdk::Color c = w.get_style()->get_bg (Gtk::STATE_NORMAL);
 329                 cairo_set_source_rgb (cr, c.get_red_p(), c.get_green_p(), c.get_blue_p());
 330         }
 331         cairo_fill (cr);
 332
 333         height = min(1024, height); // XXX see FastMeter::max_pattern_metric_size
 334
 335         for (vector<DataType>::const_iterator i = types.begin(); i != types.end(); ++i) {
 336
 337                 Gdk::Color c;
 338
 339                 if (types.size() > 1) {
 340                         /* we're overlaying more than 1 set of marks, so use different colours */
 341                         Gdk::Color c;
 342                         switch (*i) {
 343                         case DataType::AUDIO:
 344                                 c = w.get_style()->get_fg (Gtk::STATE_NORMAL);
 345                                 cairo_set_source_rgb (cr, c.get_red_p(), c.get_green_p(), c.get_blue_p());
 346                                 break;
 347                         case DataType::MIDI:
 348                                 c = w.get_style()->get_fg (Gtk::STATE_ACTIVE);
 349                                 cairo_set_source_rgb (cr, c.get_red_p(), c.get_green_p(), c.get_blue_p());
 350                                 break;
 351                         }
 352                 } else {
 353                         c = w.get_style()->get_fg (Gtk::STATE_NORMAL);
 354                         cairo_set_source_rgb (cr, c.get_red_p(), c.get_green_p(), c.get_blue_p());
 355                 }
 356
 357                 vector<int> points;
 358
 359                 switch (*i) {
 360                 case DataType::AUDIO:
 361                         layout->set_attributes (audio_font_attributes);
 362                         points.push_back (-50);
 363                         points.push_back (-40);
 364                         points.push_back (-30);
 365                         points.push_back (-20);
 366                         points.push_back (-18);
 367                         points.push_back (-10);
 368                         points.push_back (-6);
 369                         points.push_back (-3);
 370                         points.push_back (0);
 371                         points.push_back (4);
 372                         break;
 373
 374                 case DataType::MIDI:
 375                         layout->set_attributes (midi_font_attributes);
 376                         points.push_back (0);
 377                         if (types.size() == 1) {
 378                                 points.push_back (32);
 379                         } else {
 380                                 /* tweak so as not to overlay the -30dB mark */
 381                                 points.push_back (48);
 382                         }
 383                         if (types.size() == 1) {
 384                                 points.push_back (64); // very close to -18dB
 385                                 points.push_back (96); // overlays with -6dB mark
 386                         } else {
 387                                 points.push_back (72);
 388                                 points.push_back (88);
 389                         }
 390                         points.push_back (127);
 391                         break;
 392                 }
 393
 394                 char buf[32];
 395
 396                 for (vector<int>::const_iterator j = points.begin(); j != points.end(); ++j) {
 397
 398                         float fraction = 0;
 399                         switch (*i) {
 400                         case DataType::AUDIO:
 401                                 fraction = log_meter (*j);
 402                                 snprintf (buf, sizeof (buf), "%+2d", *j);
 403                                 break;
 404                         case DataType::MIDI:
 405                                 fraction = *j / 127.0;
 406                                 snprintf (buf, sizeof (buf), "%3d", *j);
 407                                 break;
 408                         }
 409
 410                         gint const pos = height - (gint) floor (height * fraction);
 411
 412                         cairo_set_line_width (cr, 1.0);
 413                         cairo_move_to (cr, width-3.5, pos);
 414                         cairo_line_to (cr, width, pos);
 415                         cairo_stroke (cr);
 416
 417                         layout->set_text(buf);
 418
 419                         /* we want logical extents, not ink extents here */
 420
 421                         int tw, th;
 422                         layout->get_pixel_size(tw, th);
 423
 424                         int p = pos - (th / 2);
 425                         p = min (p, height - th);
 426                         p = max (p, 0);
 427
 428                         cairo_move_to (cr, width-5-tw, p);
 429                         pango_cairo_show_layout (cr, layout->gobj());
 430                 }
 431         }
 432
 433         if (types.size() == 1) {
 434                 int tw, th;
 435                 layout->set_attributes (unit_font_attributes);
 436                 switch (types.at(0)) {
 437                         case DataType::AUDIO:
 438                                 layout->set_text("dBFS");
 439                                 layout->get_pixel_size(tw, th);
 440                                 break;
 441                         case DataType::MIDI:
 442                                 layout->set_text("vel");
 443                                 layout->get_pixel_size(tw, th);
 444                                 break;
 445                 }
 446                 Gdk::Color c = w.get_style()->get_fg (Gtk::STATE_ACTIVE);
 447                 cairo_set_source_rgb (cr, c.get_red_p(), c.get_green_p(), c.get_blue_p());
 448                 cairo_move_to (cr, 1, height - th);
 449                 pango_cairo_show_layout (cr, layout->gobj());
 450         }
 451
 452         cairo_pattern_t* pattern = cairo_pattern_create_for_surface (surface);
 453         MetricPatterns::iterator p;
 454
 455         if ((p = metric_patterns.find (w.get_name())) != metric_patterns.end()) {
 456                 cairo_pattern_destroy (p->second);
 457         }
 458
 459         metric_patterns[w.get_name()] = pattern;
 460
 461         cairo_destroy (cr);
 462         cairo_surface_destroy (surface);
 463
 464         return pattern;
 465 }
 466
 467 /* XXX code-copy from gain_meter.cc -- TODO consolidate */
 468 gint
 469 MeterStrip::meter_metrics_expose (GdkEventExpose *ev)
 470 {
 471         Glib::RefPtr<Gdk::Window> win (meter_metric_area.get_window());
 472         cairo_t* cr;
 473
 474         cr = gdk_cairo_create (win->gobj());
 475
 476         /* clip to expose area */
 477
 478         gdk_cairo_rectangle (cr, &ev->area);
 479         cairo_clip (cr);
 480
 481         cairo_pattern_t* pattern;
 482         MetricPatterns::iterator i = metric_patterns.find (meter_metric_area.get_name());
 483
 484         if (i == metric_patterns.end() || style_changed) {
 485                 pattern = render_metrics (meter_metric_area, _types);
 486         } else {
 487                 pattern = i->second;
 488         }
 489
 490         cairo_move_to (cr, 0, 0);
 491         cairo_set_source (cr, pattern);
 492
 493         gint width, height;
 494         win->get_size (width, height);
 495
 496         cairo_rectangle (cr, 0, 0, width, height);
 497         cairo_fill (cr);
 498
 499         style_changed = false;
 500
 501         cairo_destroy (cr);
 502
 503         return true;
 504 }
 505
 506 cairo_pattern_t*
 507 MeterStrip::render_ticks (Gtk::Widget& w, vector<DataType> types)
 508 {
 509         Glib::RefPtr<Gdk::Window> win (w.get_window());
 510
 511         gint width, height;
 512         win->get_size (width, height);
 513
 514         cairo_surface_t* surface = cairo_image_surface_create (CAIRO_FORMAT_RGB24, width, height);
 515         cairo_t* cr = cairo_create (surface);
 516
 517         cairo_move_to (cr, 0, 0);
 518         cairo_rectangle (cr, 0, 0, width, height);
 519         {
 520                 Gdk::Color c = w.get_style()->get_bg (Gtk::STATE_NORMAL);
 521                 cairo_set_source_rgb (cr, c.get_red_p(), c.get_green_p(), c.get_blue_p());
 522         }
 523         cairo_fill (cr);
 524
 525         height = min(1024, height); // XXX see FastMeter::max_pattern_metric_size
 526
 527         for (vector<DataType>::const_iterator i = types.begin(); i != types.end(); ++i) {
 528
 529                 Gdk::Color c;
 530
 531                 if (types.size() > 1) {
 532                         /* we're overlaying more than 1 set of marks, so use different colours */
 533                         Gdk::Color c;
 534                         switch (*i) {
 535                         case DataType::AUDIO:
 536                                 c = w.get_style()->get_fg (Gtk::STATE_NORMAL);
 537                                 cairo_set_source_rgb (cr, c.get_red_p(), c.get_green_p(), c.get_blue_p());
 538                                 break;
 539                         case DataType::MIDI:
 540                                 c = w.get_style()->get_fg (Gtk::STATE_ACTIVE);
 541                                 cairo_set_source_rgb (cr, c.get_red_p(), c.get_green_p(), c.get_blue_p());
 542                                 break;
 543                         }
 544                 } else {
 545                         c = w.get_style()->get_fg (Gtk::STATE_NORMAL);
 546                         cairo_set_source_rgb (cr, c.get_red_p(), c.get_green_p(), c.get_blue_p());
 547                 }
 548
 549                 vector<int> points;
 550
 551                 switch (*i) {
 552                 case DataType::AUDIO:
 553                         points.push_back (-50);
 554                         points.push_back (-40);
 555                         points.push_back (-30);
 556                         points.push_back (-20);
 557                         points.push_back (-18);
 558                         points.push_back (-10);
 559                         points.push_back (-6);
 560                         points.push_back (-3);
 561                         points.push_back (0);
 562                         points.push_back (4);
 563                         break;
 564
 565                 case DataType::MIDI:
 566                         points.push_back (0);
 567                         points.push_back (32);
 568                         points.push_back (64);
 569                         points.push_back (96);
 570                         points.push_back (127);
 571                         break;
 572                 }
 573
 574                 for (vector<int>::const_iterator j = points.begin(); j != points.end(); ++j) {
 575
 576                         float fraction = 0;
 577                         switch (*i) {
 578                         case DataType::AUDIO:
 579                                 fraction = log_meter (*j);
 580                                 break;
 581                         case DataType::MIDI:
 582                                 fraction = *j / 127.0;
 583                                 break;
 584                         }
 585
 586                         gint const pos = height - (gint) floor (height * fraction);
 587                         cairo_set_line_width (cr, 1.0);
 588                         cairo_arc(cr, 1.5, pos, 1.0, 0, 2 * M_PI);
 589                         cairo_fill_preserve(cr);
 590                         cairo_stroke (cr);
 591                 }
 592         }
 593
 594         cairo_pattern_t* pattern = cairo_pattern_create_for_surface (surface);
 595         TickPatterns::iterator p;
 596
 597         if ((p = ticks_patterns.find (w.get_name())) != metric_patterns.end()) {
 598                 cairo_pattern_destroy (p->second);
 599         }
 600
 601         ticks_patterns[w.get_name()] = pattern;
 602
 603         cairo_destroy (cr);
 604         cairo_surface_destroy (surface);
 605
 606         return pattern;
 607 }
 608
 609 gint
 610 MeterStrip::meter_ticks1_expose (GdkEventExpose *ev)
 611 {
 612         return meter_ticks_expose(ev, &meter_ticks1_area);
 613 }
 614
 615 gint
 616 MeterStrip::meter_ticks2_expose (GdkEventExpose *ev)
 617 {
 618         return meter_ticks_expose(ev, &meter_ticks2_area);
 619 }
 620
 621 gint
 622 MeterStrip::meter_ticks_expose (GdkEventExpose *ev, Gtk::DrawingArea *mta)
 623 {
 624         Glib::RefPtr<Gdk::Window> win (mta->get_window());
 625         cairo_t* cr;
 626
 627         cr = gdk_cairo_create (win->gobj());
 628
 629         /* clip to expose area */
 630
 631         gdk_cairo_rectangle (cr, &ev->area);
 632         cairo_clip (cr);
 633
 634         cairo_pattern_t* pattern;
 635         TickPatterns::iterator i = ticks_patterns.find (mta->get_name());
 636
 637         if (i == ticks_patterns.end() || style_changed) {
 638                 pattern = render_ticks (*mta, _types);
 639         } else {
 640                 pattern = i->second;
 641         }
 642
 643         cairo_move_to (cr, 0, 0);
 644         cairo_set_source (cr, pattern);
 645
 646         gint width, height;
 647         win->get_size (width, height);
 648
 649         cairo_rectangle (cr, 0, 0, width, height);
 650         cairo_fill (cr);
 651
 652         style_changed = false;
 653
 654         cairo_destroy (cr);
 655
 656         return true;
 657 }
 658
 659 void
 660 MeterStrip::reset_group_peak_display (RouteGroup* group)
 661 {
 662         if (_route && group == _route->route_group()) {
 663                 reset_peak_display ();
 664         }
 665 }
 666
 667 void
 668 MeterStrip::reset_peak_display ()
 669 {
 670         _route->shared_peak_meter()->reset_max();
 671         level_meter->clear_meters();
 672         max_peak = -INFINITY;
 673         peak_display.set_label (_("-inf"));
 674         peak_display.set_name ("MixerStripPeakDisplay");
 675 }
 676
 677 bool
 678 MeterStrip::peak_button_release (GdkEventButton* ev)
 679 {
 680         reset_peak_display ();
 681         return true;
 682 }