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