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