src/wx/audio_mapping_view.cc

   1 /*
   2     Copyright (C) 2013-2021 Carl Hetherington <cth@carlh.net>
   3
   4     This file is part of DCP-o-matic.
   5
   6     DCP-o-matic is free software; you can redistribute it and/or modify
   7     it under the terms of the GNU General Public License as published by
   8     the Free Software Foundation; either version 2 of the License, or
   9     (at your option) any later version.
  10
  11     DCP-o-matic is distributed in the hope that it will be useful,
  12     but WITHOUT ANY WARRANTY; without even the implied warranty of
  13     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14     GNU General Public License for more details.
  15
  16     You should have received a copy of the GNU General Public License
  17     along with DCP-o-matic.  If not, see <http://www.gnu.org/licenses/>.
  18
  19 */
  20
  21
  22 /** @file  src/wx/audio_mapping_view.cc
  23  *  @brief AudioMappingView class and helpers.
  24  */
  25
  26
  27 #include "audio_gain_dialog.h"
  28 #include "audio_mapping_view.h"
  29 #include "wx_util.h"
  30 #include "lib/audio_mapping.h"
  31 #include "lib/maths_util.h"
  32 #include <dcp/locale_convert.h>
  33 #include <dcp/types.h>
  34 #include <dcp/warnings.h>
  35 LIBDCP_DISABLE_WARNINGS
  36 #include <wx/graphics.h>
  37 #include <wx/grid.h>
  38 #include <wx/renderer.h>
  39 #include <wx/wx.h>
  40 LIBDCP_ENABLE_WARNINGS
  41
  42
  43 using std::list;
  44 using std::make_pair;
  45 using std::max;
  46 using std::min;
  47 using std::pair;
  48 using std::shared_ptr;
  49 using std::string;
  50 using std::vector;
  51 using boost::optional;
  52 #if BOOST_VERSION >= 106100
  53 using namespace boost::placeholders;
  54 #endif
  55 using dcp::locale_convert;
  56
  57
  58 static constexpr auto INDICATOR_SIZE = 20;
  59 static constexpr auto ROW_HEIGHT = 32;
  60 static constexpr auto MINIMUM_COLUMN_WIDTH = 32;
  61 static constexpr auto LEFT_WIDTH = MINIMUM_COLUMN_WIDTH * 3;
  62 static constexpr auto TOP_HEIGHT = ROW_HEIGHT * 2;
  63 static constexpr auto COLUMN_PADDING = 16;
  64 static constexpr auto HORIZONTAL_PAGE_SIZE = 32;
  65
  66
  67 enum {
  68         ID_off = 1,
  69         ID_minus6dB = 2,
  70         ID_0dB = 3,
  71         ID_plus3dB = 4,
  72         ID_edit = 5
  73 };
  74
  75
  76 AudioMappingView::AudioMappingView (wxWindow* parent, wxString left_label, wxString from, wxString top_label, wxString to)
  77         : wxPanel (parent, wxID_ANY)
  78         , _menu_input (0)
  79         , _menu_output (1)
  80         , _left_label (left_label)
  81         , _from (from)
  82         , _top_label (top_label)
  83         , _to (to)
  84 {
  85         _menu = new wxMenu;
  86         _menu->Append (ID_off, _("Off"));
  87         _menu->Append (ID_minus6dB, _("-6dB"));
  88         _menu->Append (ID_0dB, _("0dB (unchanged)"));
  89         _menu->Append (ID_plus3dB, _("+3dB"));
  90         _menu->Append (ID_edit, _("Edit..."));
  91
  92         _body = new wxPanel (this, wxID_ANY);
  93         _vertical_scroll = new wxScrollBar (this, wxID_ANY, wxDefaultPosition, wxDefaultSize, wxSB_VERTICAL);
  94         _horizontal_scroll = new wxScrollBar (this, wxID_ANY);
  95
  96 #ifndef __WXOSX__
  97         SetDoubleBuffered (true);
  98 #endif
  99
 100         Bind (wxEVT_SIZE, boost::bind(&AudioMappingView::size, this, _1));
 101         Bind (wxEVT_MENU, boost::bind(&AudioMappingView::set_gain_from_menu, this, 0), ID_off);
 102         Bind (wxEVT_MENU, boost::bind(&AudioMappingView::set_gain_from_menu, this, db_to_linear(-6)), ID_minus6dB);
 103         Bind (wxEVT_MENU, boost::bind(&AudioMappingView::set_gain_from_menu, this, 1), ID_0dB);
 104         Bind (wxEVT_MENU, boost::bind(&AudioMappingView::set_gain_from_menu, this, db_to_linear(3)), ID_plus3dB);
 105         Bind (wxEVT_MENU, boost::bind(&AudioMappingView::edit, this), ID_edit);
 106         Bind (wxEVT_MOUSEWHEEL, boost::bind(&AudioMappingView::mouse_wheel, this, _1));
 107         _body->Bind (wxEVT_PAINT, boost::bind(&AudioMappingView::paint, this));
 108         _body->Bind (wxEVT_LEFT_DOWN, boost::bind(&AudioMappingView::left_down, this, _1));
 109         _body->Bind (wxEVT_RIGHT_DOWN, boost::bind(&AudioMappingView::right_down, this, _1));
 110         _body->Bind (wxEVT_MOTION, boost::bind(&AudioMappingView::motion, this, _1));
 111         _vertical_scroll->Bind (wxEVT_SCROLL_TOP, boost::bind(&AudioMappingView::scroll, this));
 112         _vertical_scroll->Bind (wxEVT_SCROLL_BOTTOM, boost::bind(&AudioMappingView::scroll, this));
 113         _vertical_scroll->Bind (wxEVT_SCROLL_LINEUP, boost::bind(&AudioMappingView::scroll, this));
 114         _vertical_scroll->Bind (wxEVT_SCROLL_LINEDOWN, boost::bind(&AudioMappingView::scroll, this));
 115         _vertical_scroll->Bind (wxEVT_SCROLL_PAGEUP, boost::bind(&AudioMappingView::scroll, this));
 116         _vertical_scroll->Bind (wxEVT_SCROLL_PAGEDOWN, boost::bind(&AudioMappingView::scroll, this));
 117         _vertical_scroll->Bind (wxEVT_SCROLL_THUMBTRACK, boost::bind(&AudioMappingView::scroll, this));
 118         _vertical_scroll->Bind (wxEVT_SCROLL_THUMBRELEASE, boost::bind(&AudioMappingView::scroll, this));
 119         _horizontal_scroll->Bind (wxEVT_SCROLL_TOP, boost::bind(&AudioMappingView::scroll, this));
 120         _horizontal_scroll->Bind (wxEVT_SCROLL_BOTTOM, boost::bind(&AudioMappingView::scroll, this));
 121         _horizontal_scroll->Bind (wxEVT_SCROLL_LINEUP, boost::bind(&AudioMappingView::scroll, this));
 122         _horizontal_scroll->Bind (wxEVT_SCROLL_LINEDOWN, boost::bind(&AudioMappingView::scroll, this));
 123         _horizontal_scroll->Bind (wxEVT_SCROLL_PAGEUP, boost::bind(&AudioMappingView::scroll, this));
 124         _horizontal_scroll->Bind (wxEVT_SCROLL_PAGEDOWN, boost::bind(&AudioMappingView::scroll, this));
 125         _horizontal_scroll->Bind (wxEVT_SCROLL_THUMBTRACK, boost::bind(&AudioMappingView::scroll, this));
 126         _horizontal_scroll->Bind (wxEVT_SCROLL_THUMBRELEASE, boost::bind(&AudioMappingView::scroll, this));
 127 }
 128
 129
 130 void
 131 AudioMappingView::size (wxSizeEvent& ev)
 132 {
 133         setup ();
 134         ev.Skip ();
 135 }
 136
 137
 138 void
 139 AudioMappingView::setup ()
 140 {
 141         auto const s = GetSize();
 142         int const w = _vertical_scroll->GetSize().GetWidth();
 143         int const h = _horizontal_scroll->GetSize().GetHeight();
 144
 145         _vertical_scroll->SetPosition (wxPoint(s.GetWidth() - w, 0));
 146         _vertical_scroll->SetSize (wxSize(w, max(0, s.GetHeight() - h)));
 147
 148         _body->SetSize (wxSize(max(0, s.GetWidth() - w), max(0, s.GetHeight() - h)));
 149
 150         _horizontal_scroll->SetPosition (wxPoint(0, s.GetHeight() - h));
 151         _horizontal_scroll->SetSize (wxSize(max(0, s.GetWidth() - w), h));
 152
 153         _vertical_scroll->SetScrollbar (
 154                 _vertical_scroll->GetThumbPosition(),
 155                 s.GetHeight() - h - 8,
 156                 ROW_HEIGHT * (2 + _input_channels.size()),
 157                 ROW_HEIGHT,
 158                 true
 159                 );
 160
 161         wxClientDC dc (GetParent());
 162         dc.SetFont (wxSWISS_FONT->Bold());
 163
 164         _column_widths.clear ();
 165         _column_widths.reserve (_output_channels.size());
 166         _column_widths_total = 0;
 167
 168         for (auto const& i: _output_channels) {
 169                 wxCoord width;
 170                 wxCoord height;
 171                 dc.GetTextExtent (std_to_wx(i.name), &width, &height);
 172                 auto const this_width = max(width + COLUMN_PADDING, MINIMUM_COLUMN_WIDTH);
 173                 _column_widths.push_back (this_width);
 174                 _column_widths_total += this_width;
 175         }
 176
 177         _horizontal_scroll->SetScrollbar (
 178                 _horizontal_scroll->GetThumbPosition(),
 179                 s.GetWidth() - w - 8,
 180                 LEFT_WIDTH + _column_widths_total,
 181                 HORIZONTAL_PAGE_SIZE,
 182                 true);
 183 }
 184
 185
 186 void
 187 AudioMappingView::scroll ()
 188 {
 189         Refresh ();
 190 }
 191
 192
 193 void
 194 AudioMappingView::paint_static (wxDC& dc)
 195 {
 196         dc.SetFont (wxSWISS_FONT->Bold());
 197         wxCoord label_width;
 198         wxCoord label_height;
 199
 200         dc.GetTextExtent (_top_label, &label_width, &label_height);
 201         dc.DrawText (_top_label, LEFT_WIDTH + (_column_widths_total - label_width) / 2, (ROW_HEIGHT - label_height) / 2);
 202
 203         dc.GetTextExtent (_left_label, &label_width, &label_height);
 204         dc.DrawRotatedText (
 205                 _left_label,
 206                 (ROW_HEIGHT - label_height) / 2,
 207                 TOP_HEIGHT + (_input_channels.size() * ROW_HEIGHT + label_width) / 2,
 208                 90
 209                 );
 210
 211         dc.SetFont (*wxSWISS_FONT);
 212 }
 213
 214
 215 void
 216 AudioMappingView::paint_column_labels (wxDC& dc)
 217 {
 218         wxCoord label_width;
 219         wxCoord label_height;
 220         int x = LEFT_WIDTH;
 221         for (auto i = 0U; i < _output_channels.size(); ++i) {
 222                 auto const name = std_to_wx(_output_channels[i].name);
 223                 dc.GetTextExtent (name, &label_width, &label_height);
 224                 dc.DrawText (name, x + (_column_widths[i] - label_width) / 2, ROW_HEIGHT + (ROW_HEIGHT - label_height) / 2);
 225                 x += _column_widths[i];
 226         }
 227
 228         dc.DrawLine(wxPoint(LEFT_WIDTH, ROW_HEIGHT), wxPoint(LEFT_WIDTH + _column_widths_total, ROW_HEIGHT));
 229         dc.DrawLine(wxPoint(LEFT_WIDTH, ROW_HEIGHT * 2), wxPoint(LEFT_WIDTH + _column_widths_total, ROW_HEIGHT * 2));
 230 }
 231
 232
 233 void
 234 AudioMappingView::paint_column_lines (wxDC& dc)
 235 {
 236         int x = LEFT_WIDTH;
 237         for (size_t i = 0; i < _output_channels.size(); ++i) {
 238                 dc.DrawLine (
 239                         wxPoint(x, ROW_HEIGHT),
 240                         wxPoint(x, TOP_HEIGHT + _input_channels.size() * ROW_HEIGHT)
 241                         );
 242                 x += _column_widths[i];
 243         }
 244
 245         dc.DrawLine (
 246                 wxPoint(LEFT_WIDTH + _column_widths_total, ROW_HEIGHT),
 247                 wxPoint(LEFT_WIDTH + _column_widths_total, TOP_HEIGHT + _input_channels.size() * ROW_HEIGHT)
 248                 );
 249 }
 250
 251
 252 void
 253 AudioMappingView::paint_row_labels (wxDC& dc)
 254 {
 255         wxCoord label_width;
 256         wxCoord label_height;
 257
 258         /* Row channel labels */
 259
 260         for (auto i = 0U; i < _input_channels.size(); ++i) {
 261                 auto const name = std_to_wx(_input_channels[i].name);
 262                 dc.GetTextExtent (name, &label_width, &label_height);
 263                 dc.DrawText (name, LEFT_WIDTH - MINIMUM_COLUMN_WIDTH + (MINIMUM_COLUMN_WIDTH - label_width) / 2, TOP_HEIGHT + ROW_HEIGHT * i + (ROW_HEIGHT - label_height) / 2);
 264         }
 265
 266         /* Vertical lines on the left */
 267
 268         for (int i = 1; i < 3; ++i) {
 269                 dc.DrawLine (
 270                         wxPoint(MINIMUM_COLUMN_WIDTH * i, TOP_HEIGHT),
 271                         wxPoint(MINIMUM_COLUMN_WIDTH * i, TOP_HEIGHT + _input_channels.size() * ROW_HEIGHT)
 272                         );
 273         }
 274
 275         int y = TOP_HEIGHT;
 276         for (auto const& i: _input_groups) {
 277                 dc.DrawLine (wxPoint(MINIMUM_COLUMN_WIDTH, y), wxPoint(MINIMUM_COLUMN_WIDTH * 2, y));
 278                 y += (i.to - i.from + 1) * ROW_HEIGHT;
 279         }
 280         dc.DrawLine (wxPoint(MINIMUM_COLUMN_WIDTH, y), wxPoint(MINIMUM_COLUMN_WIDTH * 2, y));
 281
 282         /* Group labels and lines; be careful here as wxDCClipper does not restore the old
 283          * clipping rectangle after it is destroyed
 284          */
 285         y = TOP_HEIGHT;
 286         for (auto const& i: _input_groups) {
 287                 int const height = (i.to - i.from + 1) * ROW_HEIGHT;
 288                 dc.GetTextExtent (std_to_wx(i.name), &label_width, &label_height);
 289                 if (label_width > height) {
 290                         label_width = height - 8;
 291                 }
 292
 293                 {
 294                         wxDCClipper clip (dc, wxRect(MINIMUM_COLUMN_WIDTH, y, ROW_HEIGHT, height));
 295                         int yp = y;
 296                         if ((yp - 2 * ROW_HEIGHT) < dc.GetLogicalOrigin().y) {
 297                                 yp += dc.GetLogicalOrigin().y;
 298                         }
 299
 300                         dc.DrawRotatedText (
 301                                 std_to_wx(i.name),
 302                                 ROW_HEIGHT + (ROW_HEIGHT - label_height) / 2,
 303                                 y + (height + label_width) / 2,
 304                                 90
 305                                 );
 306                 }
 307
 308                 y += height;
 309         }
 310 }
 311
 312
 313 void
 314 AudioMappingView::paint_row_lines (wxDC& dc)
 315 {
 316         for (size_t i = 0; i < _input_channels.size(); ++i) {
 317                 dc.DrawLine (
 318                         wxPoint(MINIMUM_COLUMN_WIDTH * 2, TOP_HEIGHT + ROW_HEIGHT * i),
 319                         wxPoint(LEFT_WIDTH + _column_widths_total, TOP_HEIGHT + ROW_HEIGHT * i)
 320                         );
 321         }
 322         dc.DrawLine (
 323                 wxPoint(MINIMUM_COLUMN_WIDTH * 2, TOP_HEIGHT + ROW_HEIGHT * _input_channels.size()),
 324                 wxPoint(LEFT_WIDTH + _column_widths_total, TOP_HEIGHT + ROW_HEIGHT * _input_channels.size())
 325                 );
 326 }
 327
 328
 329 void
 330 AudioMappingView::paint_indicators (wxDC& dc)
 331 {
 332         /* _{input,output}_channels and _map may not always be in sync, be careful here */
 333         size_t const output = min(_output_channels.size(), size_t(_map.output_channels()));
 334         size_t const input = min(_input_channels.size(), size_t(_map.input_channels()));
 335
 336         int xp = LEFT_WIDTH;
 337         for (size_t x = 0; x < output; ++x) {
 338                 for (size_t y = 0; y < input; ++y) {
 339                         dc.SetBrush (*wxWHITE_BRUSH);
 340                         dc.DrawRectangle (
 341                                 wxRect(
 342                                         xp + (_column_widths[x] - INDICATOR_SIZE) / 2,
 343                                         TOP_HEIGHT + y * ROW_HEIGHT + (ROW_HEIGHT - INDICATOR_SIZE) / 2,
 344                                         INDICATOR_SIZE, INDICATOR_SIZE
 345                                         )
 346                                 );
 347
 348                         float const value_dB = linear_to_db(_map.get(_input_channels[y].index, _output_channels[x].index));
 349                         auto const colour = value_dB <= 0 ? wxColour(0, 255, 0) : wxColour(255, 150, 0);
 350                         int const range = 18;
 351                         int height = 0;
 352                         if (value_dB > -range) {
 353                                 height = min(INDICATOR_SIZE, static_cast<int>(INDICATOR_SIZE * (1 + value_dB / range)));
 354                         }
 355
 356                         dc.SetBrush (*wxTheBrushList->FindOrCreateBrush(colour, wxBRUSHSTYLE_SOLID));
 357                         dc.DrawRectangle (
 358                                 wxRect(
 359                                         xp + (_column_widths[x] - INDICATOR_SIZE) / 2,
 360                                         TOP_HEIGHT + y * ROW_HEIGHT + (ROW_HEIGHT - INDICATOR_SIZE) / 2 + INDICATOR_SIZE - height,
 361                                         INDICATOR_SIZE, height
 362                                         )
 363                                 );
 364
 365                 }
 366                 xp += _column_widths[x];
 367         }
 368 }
 369
 370
 371 static
 372 void restore (wxDC& dc)
 373 {
 374         dc.SetLogicalOrigin (0, 0);
 375         dc.DestroyClippingRegion ();
 376 }
 377
 378
 379 void
 380 AudioMappingView::paint ()
 381 {
 382         wxPaintDC dc (_body);
 383
 384         int const hs = _horizontal_scroll->GetThumbPosition ();
 385         int const vs = _vertical_scroll->GetThumbPosition ();
 386
 387         paint_static (dc);
 388
 389         dc.SetClippingRegion (
 390                 LEFT_WIDTH,
 391                 0,
 392                 _column_widths_total,
 393                 ROW_HEIGHT * (2 + _input_channels.size())
 394                 );
 395         dc.SetLogicalOrigin (hs, 0);
 396         paint_column_labels (dc);
 397         restore (dc);
 398
 399         dc.SetClippingRegion(
 400                 0,
 401                 TOP_HEIGHT,
 402                 LEFT_WIDTH,
 403                 min(int(ROW_HEIGHT * _input_channels.size()), GetSize().GetHeight() - TOP_HEIGHT) + 1
 404              );
 405         dc.SetLogicalOrigin  (0, vs);
 406         paint_row_labels (dc);
 407         restore (dc);
 408
 409         dc.SetClippingRegion(
 410                 MINIMUM_COLUMN_WIDTH * 2,
 411                 TOP_HEIGHT,
 412                 MINIMUM_COLUMN_WIDTH + _column_widths_total,
 413                 min(int(ROW_HEIGHT * (2 + _input_channels.size())), GetSize().GetHeight() - TOP_HEIGHT)
 414              );
 415         dc.SetLogicalOrigin (hs, vs);
 416         paint_row_lines (dc);
 417         restore (dc);
 418
 419         dc.SetClippingRegion(
 420                 LEFT_WIDTH,
 421                 MINIMUM_COLUMN_WIDTH,
 422                 MINIMUM_COLUMN_WIDTH + _column_widths_total,
 423                 min(int(ROW_HEIGHT * (1 + _input_channels.size())), GetSize().GetHeight() - ROW_HEIGHT)
 424              );
 425         dc.SetLogicalOrigin(hs, vs);
 426         paint_column_lines (dc);
 427         restore (dc);
 428
 429         dc.SetClippingRegion (
 430                 LEFT_WIDTH,
 431                 TOP_HEIGHT,
 432                 _column_widths_total,
 433                 min(int(ROW_HEIGHT * _input_channels.size()), GetSize().GetHeight() - TOP_HEIGHT)
 434              );
 435         dc.SetLogicalOrigin(hs, vs);
 436         paint_indicators (dc);
 437         restore (dc);
 438 }
 439
 440
 441 optional<pair<NamedChannel, NamedChannel>>
 442 AudioMappingView::mouse_event_to_channels (wxMouseEvent& ev) const
 443 {
 444         int x = ev.GetX() + _horizontal_scroll->GetThumbPosition();
 445         int const y = ev.GetY() + _vertical_scroll->GetThumbPosition();
 446
 447         if (x <= LEFT_WIDTH || y < TOP_HEIGHT) {
 448                 return {};
 449         }
 450
 451         int const input = (y - TOP_HEIGHT) / ROW_HEIGHT;
 452
 453         x -= LEFT_WIDTH;
 454         int output = 0;
 455         for (auto const i: _column_widths) {
 456                 x -= i;
 457                 if (x < 0) {
 458                         break;
 459                 }
 460                 ++output;
 461         }
 462
 463         if (input >= int(_input_channels.size()) || output >= int(_output_channels.size())) {
 464                 return {};
 465         }
 466
 467         return make_pair(_input_channels[input], _output_channels[output]);
 468 }
 469
 470 optional<string>
 471 AudioMappingView::mouse_event_to_input_group_name (wxMouseEvent& ev) const
 472 {
 473         int const x = ev.GetX() + _horizontal_scroll->GetThumbPosition();
 474         if (x < MINIMUM_COLUMN_WIDTH || x > (2 * MINIMUM_COLUMN_WIDTH)) {
 475                 return {};
 476         }
 477
 478         int const y = (ev.GetY() + _vertical_scroll->GetThumbPosition() - TOP_HEIGHT) / ROW_HEIGHT;
 479         for (auto i: _input_groups) {
 480                 if (i.from <= y && y <= i.to) {
 481                         return i.name;
 482                 }
 483         }
 484
 485         return {};
 486 }
 487
 488 void
 489 AudioMappingView::left_down (wxMouseEvent& ev)
 490 {
 491         auto channels = mouse_event_to_channels (ev);
 492         if (!channels) {
 493                 return;
 494         }
 495
 496         if (_map.get(channels->first.index, channels->second.index) > 0) {
 497                 _map.set (channels->first.index, channels->second.index, 0);
 498         } else {
 499                 _map.set (channels->first.index, channels->second.index, 1);
 500         }
 501
 502         map_values_changed ();
 503 }
 504
 505 void
 506 AudioMappingView::right_down (wxMouseEvent& ev)
 507 {
 508         auto channels = mouse_event_to_channels (ev);
 509         if (!channels) {
 510                 return;
 511         }
 512
 513         _menu_input = channels->first.index;
 514         _menu_output = channels->second.index;
 515         PopupMenu (_menu, ev.GetPosition());
 516 }
 517
 518 void
 519 AudioMappingView::mouse_wheel (wxMouseEvent& ev)
 520 {
 521         if (ev.ShiftDown()) {
 522                 _horizontal_scroll->SetThumbPosition (
 523                         _horizontal_scroll->GetThumbPosition() + (ev.GetWheelRotation() > 0 ? -HORIZONTAL_PAGE_SIZE : HORIZONTAL_PAGE_SIZE)
 524                         );
 525
 526         } else {
 527                 _vertical_scroll->SetThumbPosition (
 528                         _vertical_scroll->GetThumbPosition() + (ev.GetWheelRotation() > 0 ? -ROW_HEIGHT : ROW_HEIGHT)
 529                         );
 530         }
 531         Refresh ();
 532 }
 533
 534 /** Called when any gain value has changed */
 535 void
 536 AudioMappingView::map_values_changed ()
 537 {
 538         Changed (_map);
 539         _last_tooltip_channels = boost::none;
 540         Refresh ();
 541 }
 542
 543 void
 544 AudioMappingView::set_gain_from_menu (double linear)
 545 {
 546         _map.set (_menu_input, _menu_output, linear);
 547         map_values_changed ();
 548 }
 549
 550 void
 551 AudioMappingView::edit ()
 552 {
 553         auto dialog = new AudioGainDialog (this, _menu_input, _menu_output, _map.get(_menu_input, _menu_output));
 554         if (dialog->ShowModal() == wxID_OK) {
 555                 _map.set (_menu_input, _menu_output, dialog->value ());
 556                 map_values_changed ();
 557         }
 558
 559         dialog->Destroy ();
 560 }
 561
 562 void
 563 AudioMappingView::set (AudioMapping map)
 564 {
 565         _map = map;
 566         Refresh ();
 567 }
 568
 569 void
 570 AudioMappingView::set_input_channels (vector<NamedChannel> const& channels)
 571 {
 572         _input_channels = channels;
 573         setup ();
 574         Refresh ();
 575 }
 576
 577 void
 578 AudioMappingView::set_output_channels (vector<NamedChannel> const & channels)
 579 {
 580         _output_channels = channels;
 581         setup ();
 582         Refresh ();
 583 }
 584
 585
 586 wxString
 587 AudioMappingView::input_channel_name_with_group (NamedChannel const& n) const
 588 {
 589         optional<wxString> group;
 590         for (auto i: _input_groups) {
 591                 if (i.from <= n.index && n.index <= i.to) {
 592                         group = std_to_wx (i.name);
 593                 }
 594         }
 595
 596         if (group && !group->IsEmpty()) {
 597                 return wxString::Format ("%s/%s", group->data(), std_to_wx(n.name).data());
 598         }
 599
 600         return std_to_wx(n.name);
 601 }
 602
 603
 604 void
 605 AudioMappingView::motion (wxMouseEvent& ev)
 606 {
 607         auto channels = mouse_event_to_channels (ev);
 608         if (channels) {
 609                 if (channels != _last_tooltip_channels) {
 610                         wxString s;
 611                         auto const gain = _map.get(channels->first.index, channels->second.index);
 612                         if (gain == 0) {
 613                                 s = wxString::Format (
 614                                         _("No audio will be passed from %s channel '%s' to %s channel '%s'."),
 615                                         _from,
 616                                         input_channel_name_with_group(channels->first),
 617                                         _to,
 618                                         std_to_wx(channels->second.name)
 619                                         );
 620                         } else if (gain == 1) {
 621                                 s = wxString::Format (
 622                                         _("Audio will be passed from %s channel %s to %s channel %s unaltered."),
 623                                         _from,
 624                                         input_channel_name_with_group(channels->first),
 625                                         _to,
 626                                         std_to_wx(channels->second.name)
 627                                         );
 628                         } else {
 629                                 auto const dB = linear_to_db(gain);
 630                                 s = wxString::Format (
 631                                         _("Audio will be passed from %s channel %s to %s channel %s with gain %.1fdB."),
 632                                         _from,
 633                                         input_channel_name_with_group(channels->first),
 634                                         _to,
 635                                         std_to_wx(channels->second.name),
 636                                         dB
 637                                         );
 638                         }
 639
 640                         SetToolTip (s + " " + _("Right click to change gain."));
 641                 }
 642         } else {
 643                 auto group = mouse_event_to_input_group_name (ev);
 644                 if (group) {
 645                         SetToolTip (std_to_wx(*group));
 646                 } else {
 647                         SetToolTip ("");
 648                 }
 649         }
 650
 651         _last_tooltip_channels = channels;
 652         ev.Skip ();
 653 }
 654
 655 void
 656 AudioMappingView::set_input_groups (vector<Group> const & groups)
 657 {
 658         _input_groups = groups;
 659 }