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 "global_signals.h"
  37 #include "logmeter.h"
  38 #include "gui_thread.h"
  39 #include "ardour_window.h"
  40
  41 #include "meterbridge.h"
  42 #include "meter_strip.h"
  43
  44 #include "i18n.h"
  45
  46 using namespace ARDOUR;
  47 using namespace PBD;
  48 using namespace Gtk;
  49 using namespace Gtkmm2ext;
  50 using namespace std;
  51
  52 PBD::Signal1<void,MeterStrip*> MeterStrip::CatchDeletion;
  53
  54 MeterStrip::MetricPatterns MeterStrip::metric_patterns;
  55 MeterStrip::TickPatterns MeterStrip::ticks_patterns;
  56
  57 MeterStrip::MeterStrip (int metricmode)
  58         : AxisView(0)
  59         , RouteUI(0)
  60 {
  61         level_meter = 0;
  62         set_spacing(2);
  63         peakbx.set_size_request(-1, 14);
  64         btnbox.set_size_request(-1, 16);
  65
  66         _types.clear ();
  67         switch(metricmode) {
  68                 case 1:
  69                         meter_metric_area.set_name ("AudioBusMetrics");
  70                         _types.push_back (DataType::AUDIO);
  71                         break;
  72                 case 2:
  73                         meter_metric_area.set_name ("AudioTrackMetrics");
  74                         _types.push_back (DataType::AUDIO);
  75                         break;
  76                 case 3:
  77                         meter_metric_area.set_name ("MidiTrackMetrics");
  78                         _types.push_back (DataType::MIDI);
  79                         break;
  80                 default:
  81                         meter_metric_area.set_name ("AudioMidiTrackMetrics");
  82                         _types.push_back (DataType::AUDIO);
  83                         _types.push_back (DataType::MIDI);
  84                         break;
  85         }
  86         //meter_metric_area.queue_draw ();
  87
  88         set_size_request_to_display_given_text (meter_metric_area, "8888", 1, 0);
  89         meter_metric_area.signal_expose_event().connect (
  90                         sigc::mem_fun(*this, &MeterStrip::meter_metrics_expose));
  91
  92         meterbox.pack_start(meter_metric_area, true, false);
  93
  94         label.set_text("");
  95         label.set_name("MeterbridgeLabel");
  96         label.set_angle(90.0);
  97         label.set_alignment(0.5, 1.0);
  98         label.set_size_request(12, 52);
  99
 100         pack_start (peakbx, false, false);
 101         pack_start (meterbox, true, true);
 102         pack_start (btnbox, false, false);
 103         pack_start (label, false, false, 2);
 104
 105         peakbx.show();
 106         btnbox.show();
 107         label.show();
 108         meter_metric_area.show();
 109         meterbox.show();
 110
 111         UI::instance()->theme_changed.connect (sigc::mem_fun(*this, &MeterStrip::on_theme_changed));
 112         ColorsChanged.connect (sigc::mem_fun (*this, &MeterStrip::on_theme_changed));
 113         DPIReset.connect (sigc::mem_fun (*this, &MeterStrip::on_theme_changed));
 114 }
 115
 116 MeterStrip::MeterStrip (Session* sess, boost::shared_ptr<ARDOUR::Route> rt)
 117         : AxisView(sess)
 118         , RouteUI(sess)
 119         , _route(rt)
 120 {
 121         set_spacing(2);
 122         RouteUI::set_route (rt);
 123
 124         int meter_width = 6;
 125         if (_route->shared_peak_meter()->input_streams().n_total() == 1) {
 126                 meter_width = 12;
 127         }
 128
 129         // level meter + ticks
 130         level_meter = new LevelMeter(sess);
 131         level_meter->set_meter (_route->shared_peak_meter().get());
 132         level_meter->clear_meters();
 133         level_meter->setup_meters (400, meter_width, 6);
 134
 135         Gtk::Alignment *meter_align = Gtk::manage (new Gtk::Alignment());
 136         meter_align->set(0.5, 0.5, 0.0, 1.0);
 137         meter_align->add(*level_meter);
 138
 139         meterbox.pack_start(meter_ticks1_area, true, false);
 140         meterbox.pack_start(*meter_align, true, true);
 141         meterbox.pack_start(meter_ticks2_area, true, false);
 142
 143         // peak display
 144         peak_display.set_name ("MixerStripPeakDisplay");
 145         max_peak = minus_infinity();
 146         peak_display.unset_flags (Gtk::CAN_FOCUS);
 147         peak_display.set_size_request(-1, 8);
 148
 149         Gtk::Alignment *peak_align = Gtk::manage (new Gtk::Alignment());
 150         peak_align->set(0.5, 1.0, 0.9, 0.8);
 151         peak_align->add(peak_display);
 152         peakbx.pack_start(*peak_align, true, true);
 153         peakbx.set_size_request(-1, 14);
 154
 155         // add track-name label -- TODO ellipsize
 156         label.set_text(_route->name().c_str());
 157         label.set_name("MeterbridgeLabel");
 158         label.set_angle(90.0);
 159         label.set_alignment(0.5, 1.0);
 160         label.set_size_request(12, 52);
 161
 162         // rec-enable button
 163         btnbox.pack_start(*rec_enable_button, true, false);
 164         btnbox.set_size_request(-1, 16);
 165
 166         pack_start (peakbx, false, false);
 167         pack_start (meterbox, true, true);
 168         pack_start (btnbox, false, false);
 169         pack_start (label, false, false, 2);
 170
 171         peak_display.show();
 172         peakbx.show();
 173         meter_ticks1_area.show();
 174         meter_ticks2_area.show();
 175         meterbox.show();
 176         level_meter->show();
 177         meter_align->show();
 178         peak_align->show();
 179         btnbox.show();
 180         label.show();
 181
 182         _route->shared_peak_meter()->ConfigurationChanged.connect (
 183                         route_connections, invalidator (*this), boost::bind (&MeterStrip::meter_configuration_changed, this, _1), gui_context()
 184                         );
 185         meter_configuration_changed (_route->shared_peak_meter()->input_streams ());
 186
 187         meter_ticks1_area.set_size_request(3,-1);
 188         meter_ticks2_area.set_size_request(3,-1);
 189         meter_ticks1_area.signal_expose_event().connect (sigc::mem_fun(*this, &MeterStrip::meter_ticks1_expose));
 190         meter_ticks2_area.signal_expose_event().connect (sigc::mem_fun(*this, &MeterStrip::meter_ticks2_expose));
 191
 192         _route->DropReferences.connect (route_connections, invalidator (*this), boost::bind (&MeterStrip::self_delete, this), gui_context());
 193         _route->PropertyChanged.connect (route_connections, invalidator (*this), boost::bind (&MeterStrip::strip_property_changed, this, _1), gui_context());
 194
 195         peak_display.signal_button_release_event().connect (sigc::mem_fun(*this, &MeterStrip::peak_button_release), false);
 196
 197         UI::instance()->theme_changed.connect (sigc::mem_fun(*this, &MeterStrip::on_theme_changed));
 198         ColorsChanged.connect (sigc::mem_fun (*this, &MeterStrip::on_theme_changed));
 199         DPIReset.connect (sigc::mem_fun (*this, &MeterStrip::on_theme_changed));
 200 }
 201
 202 MeterStrip::~MeterStrip ()
 203 {
 204         delete level_meter;
 205         CatchDeletion (this);
 206 }
 207
 208 void
 209 MeterStrip::self_delete ()
 210 {
 211         delete this;
 212 }
 213
 214 void
 215 MeterStrip::update_rec_display ()
 216 {
 217         RouteUI::update_rec_display ();
 218 }
 219
 220 std::string
 221 MeterStrip::state_id() const
 222 {
 223         return string_compose ("mtrs %1", _route->id().to_s());
 224 }
 225
 226 void
 227 MeterStrip::set_button_names()
 228 {
 229         rec_enable_button->set_text (_("R"));
 230 }
 231
 232 void
 233 MeterStrip::strip_property_changed (const PropertyChange& what_changed)
 234 {
 235         if (!what_changed.contains (ARDOUR::Properties::name)) {
 236                 return;
 237         }
 238         ENSURE_GUI_THREAD (*this, &MeterStrip::strip_name_changed, what_changed)
 239         label.set_text(_route->name());
 240 }
 241
 242 void
 243 MeterStrip::fast_update ()
 244 {
 245         float mpeak = level_meter->update_meters();
 246         if (mpeak > max_peak) {
 247                 max_peak = mpeak;
 248                 if (mpeak >= 0.0f) {
 249                         peak_display.set_name ("MixerStripPeakDisplayPeak");
 250                 }
 251         }
 252 }
 253
 254 void
 255 MeterStrip::display_metrics (bool show)
 256 {
 257 #if 0
 258         if (show) {
 259                 meter_metric_area.show();
 260         } else {
 261                 meter_metric_area.hide();
 262         }
 263 #endif
 264 }
 265
 266 void
 267 MeterStrip::on_theme_changed()
 268 {
 269         metric_patterns.clear();
 270         ticks_patterns.clear();
 271
 272         if (level_meter && _route) {
 273                 int meter_width = 6;
 274                 if (_route->shared_peak_meter()->input_streams().n_total() == 1) {
 275                         meter_width = 12;
 276                 }
 277                 level_meter->setup_meters (400, meter_width, 6);
 278         }
 279 }
 280
 281 void
 282 MeterStrip::meter_configuration_changed (ChanCount c)
 283 {
 284         int type = 0;
 285         _types.clear ();
 286
 287         for (DataType::iterator i = DataType::begin(); i != DataType::end(); ++i) {
 288                 if (c.get (*i) > 0) {
 289                         _types.push_back (*i);
 290                         type |= 1 << (*i);
 291                 }
 292         }
 293
 294         // TODO draw Inactive routes or busses with different styles
 295         if (boost::dynamic_pointer_cast<AudioTrack>(_route) == 0
 296                         && boost::dynamic_pointer_cast<MidiTrack>(_route) == 0
 297                         ) {
 298                 meter_ticks1_area.set_name ("AudioBusMetrics");
 299                 meter_ticks2_area.set_name ("AudioBusMetrics");
 300         }
 301         else if (type == (1 << DataType::AUDIO)) {
 302                 meter_ticks1_area.set_name ("AudioTrackMetrics");
 303                 meter_ticks2_area.set_name ("AudioTrackMetrics");
 304         }
 305         else if (type == (1 << DataType::MIDI)) {
 306                 meter_ticks1_area.set_name ("MidiTrackMetrics");
 307                 meter_ticks2_area.set_name ("MidiTrackMetrics");
 308         } else {
 309                 meter_ticks1_area.set_name ("AudioMidiTrackMetrics");
 310                 meter_ticks2_area.set_name ("AudioMidiTrackMetrics");
 311         }
 312         meter_ticks1_area.queue_draw();
 313         meter_ticks2_area.queue_draw();
 314         metric_patterns.clear();
 315         ticks_patterns.clear();
 316 }
 317
 318 void
 319 MeterStrip::on_size_request (Gtk::Requisition* r)
 320 {
 321         metric_patterns.clear();
 322         ticks_patterns.clear();
 323         VBox::on_size_request(r);
 324 }
 325
 326 void
 327 MeterStrip::on_size_allocate (Gtk::Allocation& a)
 328 {
 329         metric_patterns.clear();
 330         ticks_patterns.clear();
 331         VBox::on_size_allocate(a);
 332 }
 333
 334 /* XXX code-copy from gain_meter.cc -- TODO consolidate
 335  *
 336  * slightly different:
 337  *  - ticks & label positions are swapped
 338  *  - more ticks for audio (longer meter by default)
 339  *  - right-aligned lables, unit-legend
 340  *  - height limitation of FastMeter::max_pattern_metric_size is included here
 341  */
 342 cairo_pattern_t*
 343 MeterStrip::render_metrics (Gtk::Widget& w, vector<DataType> types)
 344 {
 345         Glib::RefPtr<Gdk::Window> win (w.get_window());
 346
 347         gint width, height;
 348         win->get_size (width, height);
 349
 350         cairo_surface_t* surface = cairo_image_surface_create (CAIRO_FORMAT_RGB24, width, height);
 351         cairo_t* cr = cairo_create (surface);
 352         Glib::RefPtr<Pango::Layout> layout = Pango::Layout::create(w.get_pango_context());
 353
 354
 355         Pango::AttrList audio_font_attributes;
 356         Pango::AttrList midi_font_attributes;
 357         Pango::AttrList unit_font_attributes;
 358
 359         Pango::AttrFontDesc* font_attr;
 360         Pango::FontDescription font;
 361
 362         font = Pango::FontDescription (""); // use defaults
 363         //font = get_font_for_style("gain-fader");
 364         //font = w.get_style()->get_font();
 365
 366         font.set_weight (Pango::WEIGHT_NORMAL);
 367         font.set_size (9.0 * PANGO_SCALE);
 368         font_attr = new Pango::AttrFontDesc (Pango::Attribute::create_attr_font_desc (font));
 369         audio_font_attributes.change (*font_attr);
 370         delete font_attr;
 371
 372         font.set_weight (Pango::WEIGHT_ULTRALIGHT);
 373         font.set_stretch (Pango::STRETCH_ULTRA_CONDENSED);
 374         font.set_size (7.5 * PANGO_SCALE);
 375         font_attr = new Pango::AttrFontDesc (Pango::Attribute::create_attr_font_desc (font));
 376         midi_font_attributes.change (*font_attr);
 377         delete font_attr;
 378
 379         font.set_size (7.0 * PANGO_SCALE);
 380         font_attr = new Pango::AttrFontDesc (Pango::Attribute::create_attr_font_desc (font));
 381         unit_font_attributes.change (*font_attr);
 382         delete font_attr;
 383
 384         cairo_move_to (cr, 0, 0);
 385         cairo_rectangle (cr, 0, 0, width, height);
 386         {
 387                 Gdk::Color c = w.get_style()->get_bg (Gtk::STATE_NORMAL);
 388                 cairo_set_source_rgb (cr, c.get_red_p(), c.get_green_p(), c.get_blue_p());
 389         }
 390         cairo_fill (cr);
 391
 392         height = min(1024, height); // XXX see FastMeter::max_pattern_metric_size
 393
 394         for (vector<DataType>::const_iterator i = types.begin(); i != types.end(); ++i) {
 395
 396                 Gdk::Color c;
 397
 398                 if (types.size() > 1) {
 399                         /* we're overlaying more than 1 set of marks, so use different colours */
 400                         Gdk::Color c;
 401                         switch (*i) {
 402                         case DataType::AUDIO:
 403                                 c = w.get_style()->get_fg (Gtk::STATE_NORMAL);
 404                                 cairo_set_source_rgb (cr, c.get_red_p(), c.get_green_p(), c.get_blue_p());
 405                                 break;
 406                         case DataType::MIDI:
 407                                 c = w.get_style()->get_fg (Gtk::STATE_ACTIVE);
 408                                 cairo_set_source_rgb (cr, c.get_red_p(), c.get_green_p(), c.get_blue_p());
 409                                 break;
 410                         }
 411                 } else {
 412                         c = w.get_style()->get_fg (Gtk::STATE_NORMAL);
 413                         cairo_set_source_rgb (cr, c.get_red_p(), c.get_green_p(), c.get_blue_p());
 414                 }
 415
 416                 vector<int> points;
 417
 418                 switch (*i) {
 419                 case DataType::AUDIO:
 420                         layout->set_attributes (audio_font_attributes);
 421                         points.push_back (-50);
 422                         points.push_back (-40);
 423                         points.push_back (-30);
 424                         points.push_back (-25);
 425                         points.push_back (-20);
 426                         points.push_back (-18);
 427                         points.push_back (-15);
 428                         points.push_back (-10);
 429                         points.push_back (-5);
 430                         points.push_back (-3);
 431                         points.push_back (0);
 432                         points.push_back (3);
 433                         break;
 434
 435                 case DataType::MIDI:
 436                         layout->set_attributes (midi_font_attributes);
 437                         points.push_back (0);
 438                         if (types.size() == 1) {
 439                                 points.push_back (32);
 440                         } else {
 441                                 /* tweak so as not to overlay the -30dB mark */
 442                                 points.push_back (48);
 443                         }
 444                         if (types.size() == 1) {
 445                                 points.push_back (64); // very close to -18dB
 446                                 points.push_back (96); // overlays with -6dB mark
 447                         } else {
 448                                 points.push_back (72);
 449                                 points.push_back (88);
 450                         }
 451                         points.push_back (127);
 452                         break;
 453                 }
 454
 455                 char buf[32];
 456                 gint pos;
 457
 458                 for (vector<int>::const_iterator j = points.begin(); j != points.end(); ++j) {
 459
 460                         float fraction = 0;
 461                         switch (*i) {
 462                         case DataType::AUDIO:
 463                                 fraction = log_meter (*j);
 464                                 snprintf (buf, sizeof (buf), "%+2d", *j);
 465                                 break;
 466                         case DataType::MIDI:
 467                                 fraction = *j / 127.0;
 468                                 snprintf (buf, sizeof (buf), "%3d", *j);
 469                                 pos = height - (gint) rintf (height * fraction);
 470
 471                                 cairo_arc(cr, 2, pos, 1.0, 0, 2 * M_PI);
 472                                 cairo_fill(cr);
 473                                 cairo_stroke (cr);
 474                                 break;
 475                         }
 476
 477                         pos = height - (gint) rintf (height * fraction);
 478                         layout->set_text(buf);
 479
 480                         /* we want logical extents, not ink extents here */
 481
 482                         int tw, th;
 483                         layout->get_pixel_size(tw, th);
 484
 485                         int p = pos - (th / 2);
 486                         p = min (p, height - th);
 487                         p = max (p, 0);
 488
 489                         cairo_move_to (cr, width-1-tw, p);
 490                         pango_cairo_show_layout (cr, layout->gobj());
 491                 }
 492         }
 493
 494         if (types.size() == 1) {
 495                 int tw, th;
 496                 layout->set_attributes (unit_font_attributes);
 497                 switch (types.at(0)) {
 498                         case DataType::AUDIO:
 499                                 layout->set_text("dBFS");
 500                                 layout->get_pixel_size(tw, th);
 501                                 break;
 502                         case DataType::MIDI:
 503                                 layout->set_text("vel");
 504                                 layout->get_pixel_size(tw, th);
 505                                 break;
 506                 }
 507                 Gdk::Color c = w.get_style()->get_fg (Gtk::STATE_ACTIVE);
 508                 cairo_set_source_rgb (cr, c.get_red_p(), c.get_green_p(), c.get_blue_p());
 509                 cairo_move_to (cr, 1, height - th);
 510                 pango_cairo_show_layout (cr, layout->gobj());
 511         }
 512
 513         cairo_pattern_t* pattern = cairo_pattern_create_for_surface (surface);
 514         MetricPatterns::iterator p;
 515
 516         if ((p = metric_patterns.find (w.get_name())) != metric_patterns.end()) {
 517                 cairo_pattern_destroy (p->second);
 518         }
 519
 520         metric_patterns[w.get_name()] = pattern;
 521
 522         cairo_destroy (cr);
 523         cairo_surface_destroy (surface);
 524
 525         return pattern;
 526 }
 527
 528 /* XXX code-copy from gain_meter.cc -- TODO consolidate */
 529 gint
 530 MeterStrip::meter_metrics_expose (GdkEventExpose *ev)
 531 {
 532         Glib::RefPtr<Gdk::Window> win (meter_metric_area.get_window());
 533         cairo_t* cr;
 534
 535         cr = gdk_cairo_create (win->gobj());
 536
 537         /* clip to expose area */
 538
 539         gdk_cairo_rectangle (cr, &ev->area);
 540         cairo_clip (cr);
 541
 542         cairo_pattern_t* pattern;
 543         MetricPatterns::iterator i = metric_patterns.find (meter_metric_area.get_name());
 544
 545         if (i == metric_patterns.end()) {
 546                 pattern = render_metrics (meter_metric_area, _types);
 547         } else {
 548                 pattern = i->second;
 549         }
 550
 551         cairo_move_to (cr, 0, 0);
 552         cairo_set_source (cr, pattern);
 553
 554         gint width, height;
 555         win->get_size (width, height);
 556
 557         cairo_rectangle (cr, 0, 0, width, height);
 558         cairo_fill (cr);
 559
 560         cairo_destroy (cr);
 561
 562         return true;
 563 }
 564
 565 cairo_pattern_t*
 566 MeterStrip::render_ticks (Gtk::Widget& w, vector<DataType> types)
 567 {
 568         Glib::RefPtr<Gdk::Window> win (w.get_window());
 569
 570         gint width, height;
 571         win->get_size (width, height);
 572
 573         cairo_surface_t* surface = cairo_image_surface_create (CAIRO_FORMAT_RGB24, width, height);
 574         cairo_t* cr = cairo_create (surface);
 575
 576         cairo_move_to (cr, 0, 0);
 577         cairo_rectangle (cr, 0, 0, width, height);
 578         {
 579                 Gdk::Color c = w.get_style()->get_bg (Gtk::STATE_NORMAL);
 580                 cairo_set_source_rgb (cr, c.get_red_p(), c.get_green_p(), c.get_blue_p());
 581         }
 582         cairo_fill (cr);
 583
 584         height = min(1024, height); // XXX see FastMeter::max_pattern_metric_size
 585
 586         for (vector<DataType>::const_iterator i = types.begin(); i != types.end(); ++i) {
 587
 588                 Gdk::Color c;
 589
 590                 if (types.size() > 1) {
 591                         /* we're overlaying more than 1 set of marks, so use different colours */
 592                         Gdk::Color c;
 593                         switch (*i) {
 594                         case DataType::AUDIO:
 595                                 c = w.get_style()->get_fg (Gtk::STATE_NORMAL);
 596                                 cairo_set_source_rgb (cr, c.get_red_p(), c.get_green_p(), c.get_blue_p());
 597                                 break;
 598                         case DataType::MIDI:
 599                                 c = w.get_style()->get_fg (Gtk::STATE_ACTIVE);
 600                                 cairo_set_source_rgb (cr, c.get_red_p(), c.get_green_p(), c.get_blue_p());
 601                                 break;
 602                         }
 603                 } else {
 604                         c = w.get_style()->get_fg (Gtk::STATE_NORMAL);
 605                         cairo_set_source_rgb (cr, c.get_red_p(), c.get_green_p(), c.get_blue_p());
 606                 }
 607
 608                 std::map<int,float> points;
 609
 610                 switch (*i) {
 611                 case DataType::AUDIO:
 612                         points.insert (std::pair<int,float>(-60, 0.5));
 613                         points.insert (std::pair<int,float>(-50, 0.5));
 614                         points.insert (std::pair<int,float>(-40, 0.5));
 615                         points.insert (std::pair<int,float>(-30, 0.5));
 616                         points.insert (std::pair<int,float>(-25, 0.5));
 617                         points.insert (std::pair<int,float>(-20, 1.0));
 618
 619                         points.insert (std::pair<int,float>(-19, 0.5));
 620                         points.insert (std::pair<int,float>(-18, 1.0));
 621                         points.insert (std::pair<int,float>(-17, 0.5));
 622                         points.insert (std::pair<int,float>(-16, 0.5));
 623                         points.insert (std::pair<int,float>(-15, 1.0));
 624
 625                         points.insert (std::pair<int,float>(-14, 0.5));
 626                         points.insert (std::pair<int,float>(-13, 0.5));
 627                         points.insert (std::pair<int,float>(-12, 0.5));
 628                         points.insert (std::pair<int,float>(-11, 0.5));
 629                         points.insert (std::pair<int,float>(-10, 1.0));
 630
 631                         points.insert (std::pair<int,float>( -9, 0.5));
 632                         points.insert (std::pair<int,float>( -8, 0.5));
 633                         points.insert (std::pair<int,float>( -7, 0.5));
 634                         points.insert (std::pair<int,float>( -6, 0.5));
 635                         points.insert (std::pair<int,float>( -5, 1.0));
 636                         points.insert (std::pair<int,float>( -4, 0.5));
 637                         points.insert (std::pair<int,float>( -3, 0.5));
 638                         points.insert (std::pair<int,float>( -2, 0.5));
 639                         points.insert (std::pair<int,float>( -1, 0.5));
 640
 641                         points.insert (std::pair<int,float>(  0, 1.0));
 642                         points.insert (std::pair<int,float>(  1, 0.5));
 643                         points.insert (std::pair<int,float>(  2, 0.5));
 644                         points.insert (std::pair<int,float>(  3, 0.5));
 645                         points.insert (std::pair<int,float>(  4, 0.5));
 646                         points.insert (std::pair<int,float>(  5, 0.5));
 647                         points.insert (std::pair<int,float>(  6, 0.5));
 648                         break;
 649
 650                 case DataType::MIDI:
 651                         points.insert (std::pair<int,float>(  0, 1.0));
 652                         points.insert (std::pair<int,float>( 16, 0.5));
 653                         points.insert (std::pair<int,float>( 32, 0.5));
 654                         points.insert (std::pair<int,float>( 48, 0.5));
 655                         points.insert (std::pair<int,float>( 64, 1.0));
 656                         points.insert (std::pair<int,float>( 72, 0.5));
 657                         points.insert (std::pair<int,float>( 96, 0.5));
 658                         points.insert (std::pair<int,float>(100, 1.0));
 659                         points.insert (std::pair<int,float>(112, 0.5));
 660                         points.insert (std::pair<int,float>(127, 1.0));
 661                         break;
 662                 }
 663
 664                 for (std::map<int,float>::const_iterator j = points.begin(); j != points.end(); ++j) {
 665                         cairo_set_line_width (cr, (j->second));
 666
 667                         float fraction = 0;
 668                         gint pos;
 669
 670                         switch (*i) {
 671                         case DataType::AUDIO:
 672                                 if (j->first >= 0) {
 673                                         cairo_set_source_rgb (cr, 1.0, 0.0, 0.0);
 674                                 }
 675                                 fraction = log_meter (j->first);
 676                                 pos = height - (gint) floor (height * fraction);
 677                                 cairo_move_to(cr, 0, pos + .5);
 678                                 cairo_line_to(cr, 3, pos + .5);
 679                                 cairo_stroke (cr);
 680                                 break;
 681                         case DataType::MIDI:
 682                                 fraction = (j->first) / 127.0;
 683                                 pos = height - (gint) floor (height * fraction);
 684                                 cairo_arc(cr, 1.5, pos, (j->second), 0, 2 * M_PI);
 685                                 cairo_fill_preserve(cr);
 686                                 cairo_stroke (cr);
 687                                 break;
 688                         }
 689                 }
 690         }
 691
 692         cairo_pattern_t* pattern = cairo_pattern_create_for_surface (surface);
 693         TickPatterns::iterator p;
 694
 695         if ((p = ticks_patterns.find (w.get_name())) != metric_patterns.end()) {
 696                 cairo_pattern_destroy (p->second);
 697         }
 698
 699         ticks_patterns[w.get_name()] = pattern;
 700
 701         cairo_destroy (cr);
 702         cairo_surface_destroy (surface);
 703
 704         return pattern;
 705 }
 706
 707 gint
 708 MeterStrip::meter_ticks1_expose (GdkEventExpose *ev)
 709 {
 710         return meter_ticks_expose(ev, &meter_ticks1_area);
 711 }
 712
 713 gint
 714 MeterStrip::meter_ticks2_expose (GdkEventExpose *ev)
 715 {
 716         return meter_ticks_expose(ev, &meter_ticks2_area);
 717 }
 718
 719 gint
 720 MeterStrip::meter_ticks_expose (GdkEventExpose *ev, Gtk::DrawingArea *mta)
 721 {
 722         Glib::RefPtr<Gdk::Window> win (mta->get_window());
 723         cairo_t* cr;
 724
 725         cr = gdk_cairo_create (win->gobj());
 726
 727         /* clip to expose area */
 728
 729         gdk_cairo_rectangle (cr, &ev->area);
 730         cairo_clip (cr);
 731
 732         cairo_pattern_t* pattern;
 733         TickPatterns::iterator i = ticks_patterns.find (mta->get_name());
 734
 735         if (i == ticks_patterns.end()) {
 736                 pattern = render_ticks (*mta, _types);
 737         } else {
 738                 pattern = i->second;
 739         }
 740
 741         cairo_move_to (cr, 0, 0);
 742         cairo_set_source (cr, pattern);
 743
 744         gint width, height;
 745         win->get_size (width, height);
 746
 747         cairo_rectangle (cr, 0, 0, width, height);
 748         cairo_fill (cr);
 749
 750         cairo_destroy (cr);
 751
 752         return true;
 753 }
 754
 755 void
 756 MeterStrip::reset_group_peak_display (RouteGroup* group)
 757 {
 758         /* UNUSED -- need connection w/mixer || other meters */
 759         if (_route && group == _route->route_group()) {
 760                 reset_peak_display ();
 761         }
 762 }
 763
 764 void
 765 MeterStrip::reset_peak_display ()
 766 {
 767         _route->shared_peak_meter()->reset_max();
 768         level_meter->clear_meters();
 769         max_peak = -INFINITY;
 770         peak_display.set_name ("MixerStripPeakDisplay");
 771 }
 772
 773 bool
 774 MeterStrip::peak_button_release (GdkEventButton* ev)
 775 {
 776         reset_peak_display ();
 777         return true;
 778 }