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   $Id$
  19 */
  20
  21 #include <limits.h>
  22
  23 #include <ardour/io.h>
  24 #include <ardour/route.h>
  25 #include <ardour/route_group.h>
  26 #include <ardour/session.h>
  27 #include <ardour/session_route.h>
  28 #include <ardour/dB.h>
  29
  30 #include <gtkmm2ext/utils.h>
  31 #include <gtkmm2ext/fastmeter.h>
  32 #include <gtkmm2ext/stop_signal.h>
  33 #include <gtkmm2ext/barcontroller.h>
  34 #include <midi++/manager.h>
  35 #include <pbd/fastlog.h>
  36
  37 #include "ardour_ui.h"
  38 #include "gain_meter.h"
  39 #include "utils.h"
  40 #include "logmeter.h"
  41 #include "gui_thread.h"
  42 #include "keyboard.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 Gtkmm2ext;
  51 using namespace Gtk;
  52 using namespace sigc;
  53 using namespace std;
  54
  55 sigc::signal<void> GainMeter::ResetAllPeakDisplays;
  56 sigc::signal<void,RouteGroup*> GainMeter::ResetGroupPeakDisplays;
  57 Glib::RefPtr<Gdk::Pixbuf> GainMeter::slider;
  58 Glib::RefPtr<Gdk::Pixbuf> GainMeter::rail;
  59 map<string,Glib::RefPtr<Gdk::Pixmap> > GainMeter::metric_pixmaps;
  60
  61 int
  62 GainMeter::setup_slider_pix ()
  63 {
  64         string path = ARDOUR::find_data_file("vslider02_slider.xpm", "pixmaps");
  65         if (path.empty()) {
  66                 error << _("cannot find images for fader slider") << endmsg;
  67                 return -1;
  68         }
  69         slider = Gdk::Pixbuf::create_from_file (path);
  70
  71         path = ARDOUR::find_data_file("vslider02_rail.xpm", "pixmaps");
  72         if (path.empty()) {
  73                 error << _("cannot find images for fader rail") << endmsg;
  74                 return -1;
  75         }
  76         rail = Gdk::Pixbuf::create_from_file (path);
  77
  78         return 0;
  79 }
  80
  81 void
  82 was_pressed ()
  83 {
  84         cerr << "was pressed\n";
  85 }
  86
  87 bool
  88 was_button (GdkEventButton* ev)
  89 {
  90         cerr << "Bp/R: " << ev->type << endl;
  91         return false;
  92 }
  93
  94 GainMeter::GainMeter (IO& io, Session& s)
  95         : _io (io),
  96           _session (s),
  97           gain_slider (0),
  98           // 0.781787 is the value needed for gain to be set to 0.
  99           gain_adjustment (0.781787, 0.0, 1.0, 0.01, 0.1),
 100           gain_display (&gain_adjustment, "MixerStripGainDisplay"),
 101           gain_unit_label (_("dbFS")),
 102           meter_point_label (_("pre")),
 103           top_table (1, 2)
 104
 105 {
 106         if (slider == 0) {
 107                 setup_slider_pix ();
 108         }
 109
 110         ignore_toggle = false;
 111         meter_menu = 0;
 112
 113         gain_slider = manage (new VSliderController (slider, rail,
 114                                                      &gain_adjustment,
 115                                                      & _io.midi_gain_control(),
 116                                                      false));
 117
 118         gain_slider->signal_button_press_event().connect (mem_fun(*this, &GainMeter::start_gain_touch));
 119         gain_slider->signal_button_release_event().connect (mem_fun(*this, &GainMeter::end_gain_touch));
 120         gain_slider->set_name ("MixerGainMeter");
 121
 122         if (_session.midi_port()) {
 123                 _io.set_midi_to_gain_function (slider_position_to_gain);
 124                 _io.set_gain_to_midi_function (gain_to_slider_position);
 125         }
 126
 127         gain_display.set_print_func (_gain_printer, this);
 128
 129         gain_unit_button.add (gain_unit_label);
 130         gain_unit_button.set_name ("MixerStripGainUnitButton");
 131         gain_unit_label.set_name ("MixerStripGainUnitButton");
 132
 133         gain_unit_button.signal_clicked().connect (ptr_fun (was_pressed));
 134
 135         meter_point_button.signal_button_press_event().connect (mem_fun (*this, &GainMeter::meter_press));
 136         meter_point_button.signal_button_release_event().connect (mem_fun (*this, &GainMeter::meter_release));
 137         g_signal_connect (meter_point_button.gobj(), "button-press-event", (void (*)()) was_button, 0);
 138         g_signal_connect (meter_point_button.gobj(), "button-release-event", (void (*)()) was_button, 0);
 139
 140
 141         top_table.set_col_spacings (2);
 142         top_table.set_homogeneous (true);
 143         top_table.attach (gain_unit_button, 0, 1, 0, 1);
 144
 145         Route* r;
 146
 147         if ((r = dynamic_cast<Route*> (&_io)) != 0) {
 148
 149                 r->meter_change.connect (mem_fun(*this, &GainMeter::meter_changed));
 150                 meter_point_button.add (meter_point_label);
 151                 meter_point_button.set_name ("MixerStripMeterPreButton");
 152                 meter_point_label.set_name ("MixerStripMeterPreButton");
 153
 154                 switch (r->meter_point()) {
 155                 case MeterInput:
 156                         meter_point_label.set_text (_("input"));
 157                         break;
 158
 159                 case MeterPreFader:
 160                         meter_point_label.set_text (_("pre"));
 161                         break;
 162
 163                 case MeterPostFader:
 164                         meter_point_label.set_text (_("post"));
 165                         break;
 166                 }
 167
 168                 /* TRANSLATORS: this string should be longest of the strings
 169                    used to describe meter points. In english, its "input".
 170                 */
 171
 172                 set_size_request_to_display_given_text (meter_point_button, _("tupni"), 2, 2);
 173
 174
 175                 top_table.attach (meter_point_button, 1, 2, 0, 1);
 176         }
 177         gain_display_box.set_spacing (2);
 178         set_size_request_to_display_given_text (gain_display_frame, "-86.0", 2, 2);
 179         gain_display_frame.set_shadow_type (Gtk::SHADOW_IN);
 180         gain_display_frame.set_name ("BaseFrame");
 181         gain_display_frame.add (gain_display);
 182         gain_display_box.pack_start (gain_display_frame,  Gtk::PACK_SHRINK);
 183
 184         peak_display.set_name ("MixerStripPeakDisplay");
 185         peak_display.add (peak_display_label);
 186         set_size_request_to_display_given_text (peak_display_frame, "-86.0", 2, 2);
 187         peak_display_frame.set_shadow_type (Gtk::SHADOW_IN);
 188         peak_display_frame.set_name ("BaseFrame");
 189         peak_display_frame.add (peak_display);
 190         max_peak = minus_infinity();
 191         peak_display_label.set_text (_("-inf"));
 192
 193         gain_display_box.pack_end (peak_display_frame,  Gtk::PACK_SHRINK);
 194
 195         meter_metric_area.set_size_request (25, -1);
 196         meter_metric_area.set_name ("MeterMetricsStrip");
 197
 198         meter_packer.set_spacing (2);
 199
 200         hbox.set_spacing (4);
 201         hbox.pack_start (*gain_slider, false, false, 2);
 202         hbox.pack_start (meter_packer, true, false);
 203
 204         set_spacing (4);
 205
 206         pack_start (top_table,  Gtk::PACK_SHRINK);
 207         pack_start (gain_display_box,  Gtk::PACK_SHRINK);
 208         pack_start (hbox,  Gtk::PACK_SHRINK);
 209
 210         _io.gain_changed.connect (mem_fun(*this, &GainMeter::gain_changed));
 211
 212         meter_metric_area.signal_expose_event().connect (mem_fun(*this, &GainMeter::meter_metrics_expose));
 213         gain_adjustment.signal_value_changed().connect (mem_fun(*this, &GainMeter::gain_adjusted));
 214         peak_display.signal_button_release_event().connect (mem_fun(*this, &GainMeter::peak_button_release));
 215
 216         _session.MeterHoldChanged.connect (mem_fun(*this, &GainMeter::meter_hold_changed));
 217
 218         gain_changed (0);
 219         update_gain_sensitive ();
 220
 221         ResetAllPeakDisplays.connect (mem_fun(*this, &GainMeter::reset_peak_display));
 222         ResetGroupPeakDisplays.connect (mem_fun(*this, &GainMeter::reset_group_peak_display));
 223 }
 224
 225 void
 226 GainMeter::set_width (Width w)
 227 {
 228         switch (w) {
 229         case Wide:
 230                 peak_display_frame.show_all();
 231                 break;
 232         case Narrow:
 233                 peak_display_frame.hide_all();
 234                 break;
 235         }
 236
 237         _width = w;
 238         setup_meters ();
 239 }
 240
 241 Glib::RefPtr<Gdk::Pixmap>
 242 GainMeter::render_metrics (Gtk::Widget& w)
 243 {
 244         Glib::RefPtr<Gdk::Window> win (w.get_window());
 245         Glib::RefPtr<Gdk::GC> fg_gc (w.get_style()->get_fg_gc (Gtk::STATE_NORMAL));
 246         Glib::RefPtr<Gdk::GC> bg_gc (w.get_style()->get_bg_gc (Gtk::STATE_NORMAL));
 247         gint x, y, width, height, depth;
 248         int  db_points[] = { -50, -40, -20, -30, -10, -3, 0, 4 };
 249         char buf[32];
 250         int theight;
 251         int twidth;
 252
 253         win->get_geometry (x, y, width, height, depth);
 254
 255         Glib::RefPtr<Gdk::Pixmap> pixmap = Gdk::Pixmap::create (win, width, height);
 256
 257         metric_pixmaps[w.get_name()] = pixmap;
 258
 259         pixmap->draw_rectangle (bg_gc, true, 0, 0, width, height);
 260
 261         Glib::RefPtr<Pango::Layout> layout = w.create_pango_layout("");
 262
 263         for (uint32_t i = 0; i < sizeof (db_points)/sizeof (db_points[0]); ++i) {
 264
 265                 float fraction = log_meter (db_points[i]);
 266                 gint pos = height - (gint) floor (height * fraction);
 267
 268                 snprintf (buf, sizeof (buf), "%d", abs (db_points[i]));
 269
 270                 layout->set_text (buf);
 271                 layout->get_pixel_size (twidth, theight);
 272
 273                 pixmap->draw_line (fg_gc, 0, pos, 4, pos);
 274                 pixmap->draw_layout (fg_gc, 6, pos - (theight/2), layout);
 275         }
 276
 277         return pixmap;
 278 }
 279
 280 gint
 281 GainMeter::meter_metrics_expose (GdkEventExpose *ev)
 282 {
 283         Glib::RefPtr<Gdk::Window> win (meter_metric_area.get_window());
 284         Glib::RefPtr<Gdk::GC> fg_gc (meter_metric_area.get_style()->get_fg_gc (Gtk::STATE_NORMAL));
 285         Glib::RefPtr<Gdk::GC> bg_gc (meter_metric_area.get_style()->get_bg_gc (Gtk::STATE_NORMAL));
 286         GdkRectangle base_rect;
 287         GdkRectangle draw_rect;
 288         gint x, y, width, height, depth;
 289
 290         win->get_geometry (x, y, width, height, depth);
 291
 292         base_rect.width = width;
 293         base_rect.height = height;
 294         base_rect.x = 0;
 295         base_rect.y = 0;
 296
 297         Glib::RefPtr<Gdk::Pixmap> pixmap;
 298         std::map<string,Glib::RefPtr<Gdk::Pixmap> >::iterator i = metric_pixmaps.find (meter_metric_area.get_name());
 299
 300         if (i == metric_pixmaps.end()) {
 301                 pixmap = render_metrics (meter_metric_area);
 302         } else {
 303                 pixmap = i->second;
 304         }
 305
 306         gdk_rectangle_intersect (&ev->area, &base_rect, &draw_rect);
 307         win->draw_rectangle (bg_gc, true, draw_rect.x, draw_rect.y, draw_rect.width, draw_rect.height);
 308         win->draw_drawable (bg_gc, pixmap, draw_rect.x, draw_rect.y, draw_rect.x, draw_rect.y, draw_rect.width, draw_rect.height);
 309
 310         return true;
 311 }
 312
 313 GainMeter::~GainMeter ()
 314 {
 315         if (meter_menu) {
 316                 delete meter_menu;
 317         }
 318
 319         for (vector<MeterInfo>::iterator i = meters.begin(); i != meters.end(); i++) {
 320                 if ((*i).meter) {
 321                         delete (*i).meter;
 322                 }
 323         }
 324 }
 325
 326 void
 327 GainMeter::update_meters ()
 328 {
 329         vector<MeterInfo>::iterator i;
 330         uint32_t n;
 331         float peak;
 332         char buf[32];
 333
 334         for (n = 0, i = meters.begin(); i != meters.end(); ++i, ++n) {
 335                 if ((*i).packed) {
 336                         peak = _io.peak_input_power (n);
 337
 338                         if (_session.meter_falloff() == 0.0f || peak > (*i).meter->get_user_level()) {
 339                                 (*i).meter->set (log_meter (peak), peak);
 340                         }
 341
 342                         if (peak > max_peak) {
 343                                 max_peak = peak;
 344                                 /* set peak display */
 345                                 snprintf (buf, sizeof(buf), "%.1f", max_peak);
 346                                 peak_display_label.set_text (buf);
 347
 348                                 if (max_peak >= 0.0f) {
 349                                         peak_display.set_name ("MixerStripPeakDisplayPeak");
 350                                 }
 351                         }
 352                 }
 353         }
 354
 355 }
 356
 357 void
 358 GainMeter::update_meters_falloff ()
 359 {
 360         vector<MeterInfo>::iterator i;
 361         uint32_t n;
 362         float dbpeak;
 363
 364         for (n = 0, i = meters.begin(); i != meters.end(); ++i, ++n) {
 365                 if ((*i).packed) {
 366                         // just do falloff
 367                         //peak = (*i).meter->get_level() * _falloff_rate;
 368                         dbpeak = (*i).meter->get_user_level() - _session.meter_falloff();
 369
 370                         dbpeak = std::max(dbpeak, -200.0f);
 371
 372                         // cerr << "tmplevel: " << tmplevel << endl;
 373                         (*i).meter->set (log_meter (dbpeak), dbpeak);
 374                 }
 375         }
 376
 377 }
 378
 379
 380 void
 381 GainMeter::meter_hold_changed()
 382 {
 383         ENSURE_GUI_THREAD(mem_fun(*this, &GainMeter::meter_hold_changed));
 384
 385         vector<MeterInfo>::iterator i;
 386         uint32_t n;
 387
 388         for (n = 0, i = meters.begin(); i != meters.end(); ++i, ++n) {
 389
 390                 (*i).meter->set_hold_count ((uint32_t) floor(_session.meter_hold()));
 391         }
 392 }
 393
 394 void
 395 GainMeter::hide_all_meters ()
 396 {
 397         bool remove_metric_area = false;
 398
 399         for (vector<MeterInfo>::iterator i = meters.begin(); i != meters.end(); ++i) {
 400                 if ((*i).packed) {
 401                         remove_metric_area = true;
 402                         meter_packer.remove (*((*i).meter));
 403                         (*i).packed = false;
 404                 }
 405         }
 406
 407         if (remove_metric_area) {
 408                 if (meter_metric_area.get_parent()) {
 409                         meter_packer.remove (meter_metric_area);
 410                 }
 411         }
 412 }
 413
 414 void
 415 GainMeter::setup_meters ()
 416 {
 417         uint32_t nmeters = _io.n_outputs();
 418         guint16 width;
 419
 420         hide_all_meters ();
 421
 422         Route* r;
 423
 424         if ((r = dynamic_cast<Route*> (&_io)) != 0) {
 425
 426                 switch (r->meter_point()) {
 427                 case MeterPreFader:
 428                 case MeterInput:
 429                         nmeters = r->n_inputs();
 430                         break;
 431                 case MeterPostFader:
 432                         nmeters = r->n_outputs();
 433                         break;
 434                 }
 435
 436         } else {
 437
 438                 nmeters = _io.n_outputs();
 439
 440         }
 441
 442         if (nmeters == 0) {
 443                 return;
 444         }
 445
 446         if (nmeters <= 2) {
 447                 width = regular_meter_width;
 448         } else {
 449                 width = thin_meter_width;
 450         }
 451
 452         while (meters.size() < nmeters) {
 453                 meters.push_back (MeterInfo());
 454         }
 455
 456         for (uint32_t n = 0; n < nmeters; ++n) {
 457                 if (meters[n].width != width) {
 458                         delete meters[n].meter;
 459                         meters[n].meter = new FastMeter ((uint32_t) floor (_session.meter_hold()), width, FastMeter::Vertical);
 460                         meters[n].width = width;
 461
 462                         meters[n].meter->add_events (Gdk::BUTTON_RELEASE_MASK);
 463                         meters[n].meter->signal_button_release_event().connect (bind (mem_fun(*this, &GainMeter::meter_button_release), n));
 464                 }
 465
 466                 meter_packer.pack_start (*meters[n].meter, Gtk::PACK_SHRINK);
 467                 meters[n].meter->show_all ();
 468                 meters[n].packed = true;
 469         }
 470
 471         if (_width == Wide) {
 472                 meter_packer.pack_start (meter_metric_area, Gtk::PACK_SHRINK);
 473                 meter_metric_area.show_all ();
 474         }
 475 }
 476
 477 gint
 478 GainMeter::peak_button_release (GdkEventButton* ev)
 479 {
 480         /* reset peak label */
 481
 482         if (ev->button == 1 && Keyboard::modifier_state_equals (ev->state, Keyboard::Control|Keyboard::Shift)) {
 483                 ResetAllPeakDisplays ();
 484         } else if (ev->button == 1 && Keyboard::modifier_state_equals (ev->state, Keyboard::Control)) {
 485                 Route* r;
 486                 if ((r = dynamic_cast<Route*> (&_io)) != 0) {
 487                         ResetGroupPeakDisplays (r->mix_group());
 488                 }
 489         } else {
 490                 reset_peak_display ();
 491         }
 492         return TRUE;
 493 }
 494
 495 void
 496 GainMeter::reset_peak_display ()
 497 {
 498         max_peak = minus_infinity();
 499         peak_display_label.set_text (_("-inf"));
 500         peak_display.set_name ("MixerStripPeakDisplay");
 501 }
 502
 503 void
 504 GainMeter::reset_group_peak_display (RouteGroup* group)
 505 {
 506         Route* r;
 507         if ((r = dynamic_cast<Route*> (&_io)) != 0) {
 508                 if (group == r->mix_group()) {
 509                         reset_peak_display ();
 510                 }
 511         }
 512 }
 513
 514 gint
 515 GainMeter::meter_button_release (GdkEventButton* ev, uint32_t which)
 516 {
 517         switch (ev->button) {
 518         case 1:
 519                 meters[which].meter->clear();
 520                 max_peak = minus_infinity();
 521                 peak_display_label.set_text (_("-inf"));
 522                 peak_display.set_name ("MixerStripPeakDisplay");
 523                 break;
 524
 525         case 3:
 526                 // popup_meter_menu (ev);
 527                 break;
 528         };
 529
 530         return TRUE;
 531 }
 532
 533 void
 534 GainMeter::popup_meter_menu (GdkEventButton *ev)
 535 {
 536         using namespace Menu_Helpers;
 537
 538         if (meter_menu == 0) {
 539                 meter_menu = new Gtk::Menu;
 540                 MenuList& items = meter_menu->items();
 541
 542                 items.push_back (MenuElem ("-inf .. +0dBFS"));
 543                 items.push_back (MenuElem ("-10dB .. +0dBFS"));
 544                 items.push_back (MenuElem ("-4 .. +0dBFS"));
 545                 items.push_back (SeparatorElem());
 546                 items.push_back (MenuElem ("-inf .. -2dBFS"));
 547                 items.push_back (MenuElem ("-10dB .. -2dBFS"));
 548                 items.push_back (MenuElem ("-4 .. -2dBFS"));
 549         }
 550
 551         meter_menu->popup (1, ev->time);
 552 }
 553
 554 void
 555 GainMeter::_gain_printer (char buf[32], Gtk::Adjustment& adj, void *arg)
 556 {
 557         static_cast<GainMeter *>(arg)->gain_printer (buf, adj);
 558 }
 559
 560 void
 561 GainMeter::gain_printer (char buf[32], Gtk::Adjustment& adj)
 562 {
 563         float v = adj.get_value();
 564
 565         if (v == 0.0) {
 566                 strcpy (buf, _("-inf"));
 567         } else {
 568                 snprintf (buf, 32, "%.1f", coefficient_to_dB (slider_position_to_gain (v)));
 569         }
 570 }
 571
 572 void
 573 GainMeter::gain_adjusted ()
 574 {
 575         if (!ignore_toggle) {
 576                 _io.set_gain (slider_position_to_gain (gain_adjustment.get_value()), this);
 577         }
 578 }
 579
 580 void
 581 GainMeter::effective_gain_display ()
 582 {
 583         gfloat value = gain_to_slider_position (_io.effective_gain());
 584
 585         if (gain_adjustment.get_value() != value) {
 586                 ignore_toggle = true;
 587                 gain_adjustment.set_value (value);
 588                 ignore_toggle = false;
 589         }
 590 }
 591
 592 void
 593 GainMeter::gain_changed (void *src)
 594 {
 595         Gtkmm2ext::UI::instance()->call_slot (mem_fun(*this, &GainMeter::effective_gain_display));
 596 }
 597
 598 void
 599 GainMeter::set_meter_strip_name (const char * name)
 600 {
 601         meter_metric_area.set_name (name);
 602 }
 603
 604 void
 605 GainMeter::set_fader_name (const char * name)
 606 {
 607         gain_slider->set_name (name);
 608 }
 609
 610 void
 611 GainMeter::update_gain_sensitive ()
 612 {
 613         static_cast<Gtkmm2ext::SliderController*>(gain_slider)->set_sensitive (!(_io.gain_automation_state() & Play));
 614 }
 615
 616
 617 static MeterPoint
 618 next_meter_point (MeterPoint mp)
 619 {
 620         switch (mp) {
 621         case MeterInput:
 622                 return MeterPreFader;
 623                 break;
 624
 625         case MeterPreFader:
 626                 return MeterPostFader;
 627                 break;
 628
 629         case MeterPostFader:
 630                 return MeterInput;
 631                 break;
 632         }
 633         /*NOTREACHED*/
 634         return MeterInput;
 635 }
 636
 637 gint
 638 GainMeter::meter_press(GdkEventButton* ev)
 639 {
 640         Route* _route;
 641
 642         wait_for_release = false;
 643
 644         cerr << "meter point button press\n";
 645
 646         if ((_route = dynamic_cast<Route*>(&_io)) == 0) {
 647                 return FALSE;
 648         }
 649
 650         if (!ignore_toggle) {
 651
 652                 if (Keyboard::is_context_menu_event (ev)) {
 653
 654                         // no menu at this time.
 655
 656                 } else {
 657
 658                         if (ev->button == 2) {
 659
 660                                 // ctrl-button2 click is the midi binding click
 661                                 // button2-click is "momentary"
 662
 663                                 if (!Keyboard::modifier_state_equals (ev->state, Keyboard::ModifierMask (Keyboard::Control))) {
 664                                         wait_for_release = true;
 665                                         old_meter_point = _route->meter_point ();
 666                                 }
 667                         }
 668
 669                         if (ev->button == 1 || ev->button == 2) {
 670
 671                                 if (Keyboard::modifier_state_equals (ev->state, Keyboard::ModifierMask (Keyboard::Control|Keyboard::Shift))) {
 672
 673                                         /* ctrl-shift-click applies change to all routes */
 674
 675                                         _session.foreach_route (this, &GainMeter::set_meter_point, next_meter_point (_route->meter_point()));
 676
 677                                 } else if (Keyboard::modifier_state_equals (ev->state, Keyboard::Control)) {
 678
 679                                         /* ctrl-click: solo mix group.
 680                                            ctrl-button2 is MIDI learn.
 681                                         */
 682
 683                                         if (ev->button == 1) {
 684                                                 set_mix_group_meter_point (*_route, next_meter_point (_route->meter_point()));
 685                                         }
 686
 687                                 } else {
 688
 689                                         /* click: solo this route */
 690
 691                                         _route->set_meter_point (next_meter_point (_route->meter_point()), this);
 692                                 }
 693                         }
 694                 }
 695         }
 696
 697         return true;
 698
 699 }
 700
 701 gint
 702 GainMeter::meter_release(GdkEventButton* ev)
 703 {
 704         cerr << "meter point button release\n";
 705
 706         if(!ignore_toggle){
 707                 if (wait_for_release){
 708                         wait_for_release = false;
 709                         set_meter_point (*(dynamic_cast<Route*>(&_io)), old_meter_point);
 710                 }
 711         }
 712         return true;
 713 }
 714
 715 void
 716 GainMeter::set_meter_point (Route& route, MeterPoint mp)
 717 {
 718         route.set_meter_point (mp, this);
 719 }
 720
 721 void
 722 GainMeter::set_mix_group_meter_point (Route& route, MeterPoint mp)
 723 {
 724         RouteGroup* mix_group;
 725
 726         if((mix_group = route.mix_group()) != 0){
 727                 mix_group->apply (&Route::set_meter_point, mp, this);
 728         } else {
 729                 route.set_meter_point (mp, this);
 730         }
 731 }
 732
 733 void
 734 GainMeter::meter_changed (void *src)
 735 {
 736         Route* r;
 737
 738         ENSURE_GUI_THREAD (bind (mem_fun(*this, &GainMeter::meter_changed), src));
 739
 740         if ((r = dynamic_cast<Route*> (&_io)) != 0) {
 741
 742                 switch (r->meter_point()) {
 743                 case MeterInput:
 744                         meter_point_label.set_text (_("input"));
 745                         break;
 746
 747                 case MeterPreFader:
 748                         meter_point_label.set_text (_("pre"));
 749                         break;
 750
 751                 case MeterPostFader:
 752                         meter_point_label.set_text (_("post"));
 753                         break;
 754                 }
 755
 756                 setup_meters ();
 757         }
 758 }
 759
 760 void
 761 GainMeter::meter_point_clicked ()
 762 {
 763         Route* r;
 764
 765         if ((r = dynamic_cast<Route*> (&_io)) != 0) {
 766
 767         }
 768 }
 769
 770 gint
 771 GainMeter::start_gain_touch (GdkEventButton* ev)
 772 {
 773         _io.start_gain_touch ();
 774         return FALSE;
 775 }
 776
 777 gint
 778 GainMeter::end_gain_touch (GdkEventButton* ev)
 779 {
 780         _io.end_gain_touch ();
 781         return FALSE;
 782 }