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_mapping_view.h"
  28 #include "wx_util.h"
  29 #include "audio_gain_dialog.h"
  30 #include "lib/audio_mapping.h"
  31 #include "lib/util.h"
  32 #include "lib/warnings.h"
  33 #include <dcp/locale_convert.h>
  34 #include <dcp/types.h>
  35 DCPOMATIC_DISABLE_WARNINGS
  36 #include <wx/wx.h>
  37 #include <wx/renderer.h>
  38 #include <wx/grid.h>
  39 #include <wx/graphics.h>
  40 DCPOMATIC_ENABLE_WARNINGS
  41 #include <iostream>
  42
  43
  44 using std::cout;
  45 using std::list;
  46 using std::string;
  47 using std::min;
  48 using std::max;
  49 using std::vector;
  50 using std::pair;
  51 using std::make_pair;
  52 using std::shared_ptr;
  53 using boost::optional;
  54 #if BOOST_VERSION >= 106100
  55 using namespace boost::placeholders;
  56 #endif
  57 using dcp::locale_convert;
  58
  59
  60 static constexpr auto INDICATOR_SIZE = 20;
  61 static constexpr auto ROW_HEIGHT = 32;
  62 static constexpr auto MINIMUM_COLUMN_WIDTH = 32;
  63 static constexpr auto LEFT_WIDTH = MINIMUM_COLUMN_WIDTH * 3;
  64 static constexpr auto TOP_HEIGHT = ROW_HEIGHT * 2;
  65 static constexpr auto COLUMN_PADDING = 16;
  66 static constexpr auto HORIZONTAL_PAGE_SIZE = 32;
  67
  68
  69 enum {
  70         ID_off = 1,
  71         ID_minus6dB = 2,
  72         ID_0dB = 3,
  73         ID_plus3dB = 4,
  74         ID_edit = 5
  75 };
  76
  77
  78 AudioMappingView::AudioMappingView (wxWindow* parent, wxString left_label, wxString from, wxString top_label, wxString to)
  79         : wxPanel (parent, wxID_ANY)
  80         , _menu_input (0)
  81         , _menu_output (1)
  82         , _left_label (left_label)
  83         , _from (from)
  84         , _top_label (top_label)
  85         , _to (to)
  86 {
  87         _menu = new wxMenu;
  88         _menu->Append (ID_off, _("Off"));
  89         _menu->Append (ID_minus6dB, _("-6dB"));
  90         _menu->Append (ID_0dB, _("0dB (unchanged)"));
  91         _menu->Append (ID_plus3dB, _("+3dB"));
  92         _menu->Append (ID_edit, _("Edit..."));
  93
  94         _body = new wxPanel (this, wxID_ANY);
  95         _vertical_scroll = new wxScrollBar (this, wxID_ANY, wxDefaultPosition, wxDefaultSize, wxSB_VERTICAL);
  96         _horizontal_scroll = new wxScrollBar (this, wxID_ANY);
  97
  98 #ifndef __WXOSX__
  99         SetDoubleBuffered (true);
 100 #endif
 101
 102         Bind (wxEVT_SIZE, boost::bind(&AudioMappingView::size, this, _1));
 103         Bind (wxEVT_MENU, boost::bind(&AudioMappingView::set_gain_from_menu, this, 0), ID_off);
 104         Bind (wxEVT_MENU, boost::bind(&AudioMappingView::set_gain_from_menu, this, db_to_linear(-6)), ID_minus6dB);
 105         Bind (wxEVT_MENU, boost::bind(&AudioMappingView::set_gain_from_menu, this, 1), ID_0dB);
 106         Bind (wxEVT_MENU, boost::bind(&AudioMappingView::set_gain_from_menu, this, db_to_linear(3)), ID_plus3dB);
 107         Bind (wxEVT_MENU, boost::bind(&AudioMappingView::edit, this), ID_edit);
 108         Bind (wxEVT_MOUSEWHEEL, boost::bind(&AudioMappingView::mouse_wheel, this, _1));
 109         _body->Bind (wxEVT_PAINT, boost::bind(&AudioMappingView::paint, this));
 110         _body->Bind (wxEVT_LEFT_DOWN, boost::bind(&AudioMappingView::left_down, this, _1));
 111         _body->Bind (wxEVT_RIGHT_DOWN, boost::bind(&AudioMappingView::right_down, this, _1));
 112         _body->Bind (wxEVT_MOTION, boost::bind(&AudioMappingView::motion, this, _1));
 113         _vertical_scroll->Bind (wxEVT_SCROLL_TOP, boost::bind(&AudioMappingView::scroll, this));
 114         _vertical_scroll->Bind (wxEVT_SCROLL_BOTTOM, boost::bind(&AudioMappingView::scroll, this));
 115         _vertical_scroll->Bind (wxEVT_SCROLL_LINEUP, boost::bind(&AudioMappingView::scroll, this));
 116         _vertical_scroll->Bind (wxEVT_SCROLL_LINEDOWN, boost::bind(&AudioMappingView::scroll, this));
 117         _vertical_scroll->Bind (wxEVT_SCROLL_PAGEUP, boost::bind(&AudioMappingView::scroll, this));
 118         _vertical_scroll->Bind (wxEVT_SCROLL_PAGEDOWN, boost::bind(&AudioMappingView::scroll, this));
 119         _vertical_scroll->Bind (wxEVT_SCROLL_THUMBTRACK, boost::bind(&AudioMappingView::scroll, this));
 120         _vertical_scroll->Bind (wxEVT_SCROLL_THUMBRELEASE, boost::bind(&AudioMappingView::scroll, this));
 121         _horizontal_scroll->Bind (wxEVT_SCROLL_TOP, boost::bind(&AudioMappingView::scroll, this));
 122         _horizontal_scroll->Bind (wxEVT_SCROLL_BOTTOM, boost::bind(&AudioMappingView::scroll, this));
 123         _horizontal_scroll->Bind (wxEVT_SCROLL_LINEUP, boost::bind(&AudioMappingView::scroll, this));
 124         _horizontal_scroll->Bind (wxEVT_SCROLL_LINEDOWN, boost::bind(&AudioMappingView::scroll, this));
 125         _horizontal_scroll->Bind (wxEVT_SCROLL_PAGEUP, boost::bind(&AudioMappingView::scroll, this));
 126         _horizontal_scroll->Bind (wxEVT_SCROLL_PAGEDOWN, boost::bind(&AudioMappingView::scroll, this));
 127         _horizontal_scroll->Bind (wxEVT_SCROLL_THUMBTRACK, boost::bind(&AudioMappingView::scroll, this));
 128         _horizontal_scroll->Bind (wxEVT_SCROLL_THUMBRELEASE, boost::bind(&AudioMappingView::scroll, this));
 129 }
 130
 131
 132 void
 133 AudioMappingView::size (wxSizeEvent& ev)
 134 {
 135         setup ();
 136         ev.Skip ();
 137 }
 138
 139
 140 void
 141 AudioMappingView::setup ()
 142 {
 143         auto const s = GetSize();
 144         int const w = _vertical_scroll->GetSize().GetWidth();
 145         int const h = _horizontal_scroll->GetSize().GetHeight();
 146
 147         _vertical_scroll->SetPosition (wxPoint(s.GetWidth() - w, 0));
 148         _vertical_scroll->SetSize (wxSize(w, max(0, s.GetHeight() - h)));
 149
 150         _body->SetSize (wxSize(max(0, s.GetWidth() - w), max(0, s.GetHeight() - h)));
 151
 152         _horizontal_scroll->SetPosition (wxPoint(0, s.GetHeight() - h));
 153         _horizontal_scroll->SetSize (wxSize(max(0, s.GetWidth() - w), h));
 154
 155         _vertical_scroll->SetScrollbar (
 156                 _vertical_scroll->GetThumbPosition(),
 157                 s.GetHeight() - h - 8,
 158                 ROW_HEIGHT * (2 + _input_channels.size()),
 159                 ROW_HEIGHT,
 160                 true
 161                 );
 162
 163         wxClientDC dc (GetParent());
 164         dc.SetFont (wxSWISS_FONT->Bold());
 165
 166         _column_widths.clear ();
 167         _column_widths.reserve (_output_channels.size());
 168         _column_widths_total = 0;
 169
 170         for (auto const& i: _output_channels) {
 171                 wxCoord width;
 172                 wxCoord height;
 173                 dc.GetTextExtent (std_to_wx(i.name), &width, &height);
 174                 auto const this_width = max(width + COLUMN_PADDING, MINIMUM_COLUMN_WIDTH);
 175                 _column_widths.push_back (this_width);
 176                 _column_widths_total += this_width;
 177         }
 178
 179         _horizontal_scroll->SetScrollbar (
 180                 _horizontal_scroll->GetThumbPosition(),
 181                 s.GetWidth() - w - 8,
 182                 LEFT_WIDTH + _column_widths_total,
 183                 HORIZONTAL_PAGE_SIZE,
 184                 true);
 185 }
 186
 187
 188 void
 189 AudioMappingView::scroll ()
 190 {
 191         Refresh ();
 192 }
 193
 194
 195 void
 196 AudioMappingView::paint_static (wxDC& dc)
 197 {
 198         dc.SetFont (wxSWISS_FONT->Bold());
 199         wxCoord label_width;
 200         wxCoord label_height;
 201
 202         dc.GetTextExtent (_top_label, &label_width, &label_height);
 203         dc.DrawText (_top_label, LEFT_WIDTH + (_column_widths_total - label_width) / 2, (ROW_HEIGHT - label_height) / 2);
 204
 205         dc.GetTextExtent (_left_label, &label_width, &label_height);
 206         dc.DrawRotatedText (
 207                 _left_label,
 208                 (ROW_HEIGHT - label_height) / 2,
 209                 TOP_HEIGHT + (_input_channels.size() * ROW_HEIGHT + label_width) / 2,
 210                 90
 211                 );
 212
 213         dc.SetFont (*wxSWISS_FONT);
 214 }
 215
 216
 217 void
 218 AudioMappingView::paint_column_labels (wxDC& dc)
 219 {
 220         wxCoord label_width;
 221         wxCoord label_height;
 222         int x = LEFT_WIDTH;
 223         for (auto i = 0U; i < _output_channels.size(); ++i) {
 224                 auto const name = std_to_wx(_output_channels[i].name);
 225                 dc.GetTextExtent (name, &label_width, &label_height);
 226                 dc.DrawText (name, x + (_column_widths[i] - label_width) / 2, ROW_HEIGHT + (ROW_HEIGHT - label_height) / 2);
 227                 x += _column_widths[i];
 228         }
 229
 230         dc.DrawLine(wxPoint(LEFT_WIDTH, ROW_HEIGHT), wxPoint(LEFT_WIDTH + _column_widths_total, ROW_HEIGHT));
 231         dc.DrawLine(wxPoint(LEFT_WIDTH, ROW_HEIGHT * 2), wxPoint(LEFT_WIDTH + _column_widths_total, ROW_HEIGHT * 2));
 232 }
 233
 234
 235 void
 236 AudioMappingView::paint_column_lines (wxDC& dc)
 237 {
 238         int x = LEFT_WIDTH;
 239         for (size_t i = 0; i < _output_channels.size(); ++i) {
 240                 dc.DrawLine (
 241                         wxPoint(x, ROW_HEIGHT),
 242                         wxPoint(x, TOP_HEIGHT + _input_channels.size() * ROW_HEIGHT)
 243                         );
 244                 x += _column_widths[i];
 245         }
 246
 247         dc.DrawLine (
 248                 wxPoint(LEFT_WIDTH + _column_widths_total, ROW_HEIGHT),
 249                 wxPoint(LEFT_WIDTH + _column_widths_total, TOP_HEIGHT + _input_channels.size() * ROW_HEIGHT)
 250                 );
 251 }
 252
 253
 254 void
 255 AudioMappingView::paint_row_labels (wxDC& dc)
 256 {
 257         wxCoord label_width;
 258         wxCoord label_height;
 259
 260         /* Row channel labels */
 261
 262         for (auto i = 0U; i < _input_channels.size(); ++i) {
 263                 auto const name = std_to_wx(_input_channels[i].name);
 264                 dc.GetTextExtent (name, &label_width, &label_height);
 265                 dc.DrawText (name, LEFT_WIDTH - MINIMUM_COLUMN_WIDTH + (MINIMUM_COLUMN_WIDTH - label_width) / 2, TOP_HEIGHT + ROW_HEIGHT * i + (ROW_HEIGHT - label_height) / 2);
 266         }
 267
 268         /* Vertical lines on the left */
 269
 270         for (int i = 1; i < 3; ++i) {
 271                 dc.DrawLine (
 272                         wxPoint(MINIMUM_COLUMN_WIDTH * i, TOP_HEIGHT),
 273                         wxPoint(MINIMUM_COLUMN_WIDTH * i, TOP_HEIGHT + _input_channels.size() * ROW_HEIGHT)
 274                         );
 275         }
 276
 277         int y = TOP_HEIGHT;
 278         for (auto const& i: _input_groups) {
 279                 dc.DrawLine (wxPoint(MINIMUM_COLUMN_WIDTH, y), wxPoint(MINIMUM_COLUMN_WIDTH * 2, y));
 280                 y += (i.to - i.from + 1) * ROW_HEIGHT;
 281         }
 282         dc.DrawLine (wxPoint(MINIMUM_COLUMN_WIDTH, y), wxPoint(MINIMUM_COLUMN_WIDTH * 2, y));
 283
 284         /* Group labels and lines; be careful here as wxDCClipper does not restore the old
 285          * clipping rectangle after it is destroyed
 286          */
 287         y = TOP_HEIGHT;
 288         for (auto const& i: _input_groups) {
 289                 int const height = (i.to - i.from + 1) * ROW_HEIGHT;
 290                 dc.GetTextExtent (std_to_wx(i.name), &label_width, &label_height);
 291                 if (label_width > height) {
 292                         label_width = height - 8;
 293                 }
 294
 295                 {
 296                         wxDCClipper clip (dc, wxRect(MINIMUM_COLUMN_WIDTH, y, ROW_HEIGHT, height));
 297                         int yp = y;
 298                         if ((yp - 2 * ROW_HEIGHT) < dc.GetLogicalOrigin().y) {
 299                                 yp += dc.GetLogicalOrigin().y;
 300                         }
 301
 302                         dc.DrawRotatedText (
 303                                 std_to_wx(i.name),
 304                                 ROW_HEIGHT + (ROW_HEIGHT - label_height) / 2,
 305                                 y + (height + label_width) / 2,
 306                                 90
 307                                 );
 308                 }
 309
 310                 y += height;
 311         }
 312 }
 313
 314
 315 void
 316 AudioMappingView::paint_row_lines (wxDC& dc)
 317 {
 318         for (size_t i = 0; i < _input_channels.size(); ++i) {
 319                 dc.DrawLine (
 320                         wxPoint(MINIMUM_COLUMN_WIDTH * 2, TOP_HEIGHT + ROW_HEIGHT * i),
 321                         wxPoint(LEFT_WIDTH + _column_widths_total, TOP_HEIGHT + ROW_HEIGHT * i)
 322                         );
 323         }
 324         dc.DrawLine (
 325                 wxPoint(MINIMUM_COLUMN_WIDTH * 2, TOP_HEIGHT + ROW_HEIGHT * _input_channels.size()),
 326                 wxPoint(LEFT_WIDTH + _column_widths_total, TOP_HEIGHT + ROW_HEIGHT * _input_channels.size())
 327                 );
 328 }
 329
 330
 331 void
 332 AudioMappingView::paint_indicators (wxDC& dc)
 333 {
 334         /* _{input,output}_channels and _map may not always be in sync, be careful here */
 335         size_t const output = min(_output_channels.size(), size_t(_map.output_channels()));
 336         size_t const input = min(_input_channels.size(), size_t(_map.input_channels()));
 337
 338         int xp = LEFT_WIDTH;
 339         for (size_t x = 0; x < output; ++x) {
 340                 for (size_t y = 0; y < input; ++y) {
 341                         dc.SetBrush (*wxWHITE_BRUSH);
 342                         dc.DrawRectangle (
 343                                 wxRect(
 344                                         xp + (_column_widths[x] - INDICATOR_SIZE) / 2,
 345                                         TOP_HEIGHT + y * ROW_HEIGHT + (ROW_HEIGHT - INDICATOR_SIZE) / 2,
 346                                         INDICATOR_SIZE, INDICATOR_SIZE
 347                                         )
 348                                 );
 349
 350                         float const value_dB = linear_to_db(_map.get(_input_channels[y].index, _output_channels[x].index));
 351                         auto const colour = value_dB <= 0 ? wxColour(0, 255, 0) : wxColour(255, 150, 0);
 352                         int const range = 18;
 353                         int height = 0;
 354                         if (value_dB > -range) {
 355                                 height = min(INDICATOR_SIZE, static_cast<int>(INDICATOR_SIZE * (1 + value_dB / range)));
 356                         }
 357
 358                         dc.SetBrush (*wxTheBrushList->FindOrCreateBrush(colour, wxBRUSHSTYLE_SOLID));
 359                         dc.DrawRectangle (
 360                                 wxRect(
 361                                         xp + (_column_widths[x] - INDICATOR_SIZE) / 2,
 362                                         TOP_HEIGHT + y * ROW_HEIGHT + (ROW_HEIGHT - INDICATOR_SIZE) / 2 + INDICATOR_SIZE - height,
 363                                         INDICATOR_SIZE, height
 364                                         )
 365                                 );
 366
 367                 }
 368                 xp += _column_widths[x];
 369         }
 370 }
 371
 372
 373 static
 374 void restore (wxDC& dc)
 375 {
 376         dc.SetLogicalOrigin (0, 0);
 377         dc.DestroyClippingRegion ();
 378 }
 379
 380
 381 void
 382 AudioMappingView::paint ()
 383 {
 384         wxPaintDC dc (_body);
 385
 386         int const hs = _horizontal_scroll->GetThumbPosition ();
 387         int const vs = _vertical_scroll->GetThumbPosition ();
 388
 389         paint_static (dc);
 390
 391         dc.SetClippingRegion (
 392                 LEFT_WIDTH,
 393                 0,
 394                 _column_widths_total,
 395                 ROW_HEIGHT * (2 + _input_channels.size())
 396                 );
 397         dc.SetLogicalOrigin (hs, 0);
 398         paint_column_labels (dc);
 399         restore (dc);
 400
 401         dc.SetClippingRegion(
 402                 0,
 403                 TOP_HEIGHT,
 404                 LEFT_WIDTH,
 405                 min(int(ROW_HEIGHT * _input_channels.size()), GetSize().GetHeight() - TOP_HEIGHT) + 1
 406              );
 407         dc.SetLogicalOrigin  (0, vs);
 408         paint_row_labels (dc);
 409         restore (dc);
 410
 411         dc.SetClippingRegion(
 412                 MINIMUM_COLUMN_WIDTH * 2,
 413                 TOP_HEIGHT,
 414                 MINIMUM_COLUMN_WIDTH + _column_widths_total,
 415                 min(int(ROW_HEIGHT * (2 + _input_channels.size())), GetSize().GetHeight() - TOP_HEIGHT)
 416              );
 417         dc.SetLogicalOrigin (hs, vs);
 418         paint_row_lines (dc);
 419         restore (dc);
 420
 421         dc.SetClippingRegion(
 422                 LEFT_WIDTH,
 423                 MINIMUM_COLUMN_WIDTH,
 424                 MINIMUM_COLUMN_WIDTH + _column_widths_total,
 425                 min(int(ROW_HEIGHT * (1 + _input_channels.size())), GetSize().GetHeight() - ROW_HEIGHT)
 426              );
 427         dc.SetLogicalOrigin(hs, vs);
 428         paint_column_lines (dc);
 429         restore (dc);
 430
 431         dc.SetClippingRegion (
 432                 LEFT_WIDTH,
 433                 TOP_HEIGHT,
 434                 _column_widths_total,
 435                 min(int(ROW_HEIGHT * _input_channels.size()), GetSize().GetHeight() - TOP_HEIGHT)
 436              );
 437         dc.SetLogicalOrigin(hs, vs);
 438         paint_indicators (dc);
 439         restore (dc);
 440 }
 441
 442
 443 optional<pair<NamedChannel, NamedChannel>>
 444 AudioMappingView::mouse_event_to_channels (wxMouseEvent& ev) const
 445 {
 446         int x = ev.GetX() + _horizontal_scroll->GetThumbPosition();
 447         int const y = ev.GetY() + _vertical_scroll->GetThumbPosition();
 448
 449         if (x <= LEFT_WIDTH || y < TOP_HEIGHT) {
 450                 return {};
 451         }
 452
 453         int const input = (y - TOP_HEIGHT) / ROW_HEIGHT;
 454
 455         x -= LEFT_WIDTH;
 456         int output = 0;
 457         for (auto const i: _column_widths) {
 458                 x -= i;
 459                 if (x < 0) {
 460                         break;
 461                 }
 462                 ++output;
 463         }
 464
 465         if (input >= int(_input_channels.size()) || output >= int(_output_channels.size())) {
 466                 return {};
 467         }
 468
 469         return make_pair(_input_channels[input], _output_channels[output]);
 470 }
 471
 472 optional<string>
 473 AudioMappingView::mouse_event_to_input_group_name (wxMouseEvent& ev) const
 474 {
 475         int const x = ev.GetX() + _horizontal_scroll->GetThumbPosition();
 476         if (x < MINIMUM_COLUMN_WIDTH || x > (2 * MINIMUM_COLUMN_WIDTH)) {
 477                 return {};
 478         }
 479
 480         int const y = (ev.GetY() + _vertical_scroll->GetThumbPosition() - TOP_HEIGHT) / ROW_HEIGHT;
 481         for (auto i: _input_groups) {
 482                 if (i.from <= y && y <= i.to) {
 483                         return i.name;
 484                 }
 485         }
 486
 487         return {};
 488 }
 489
 490 void
 491 AudioMappingView::left_down (wxMouseEvent& ev)
 492 {
 493         auto channels = mouse_event_to_channels (ev);
 494         if (!channels) {
 495                 return;
 496         }
 497
 498         if (_map.get(channels->first.index, channels->second.index) > 0) {
 499                 _map.set (channels->first.index, channels->second.index, 0);
 500         } else {
 501                 _map.set (channels->first.index, channels->second.index, 1);
 502         }
 503
 504         map_values_changed ();
 505 }
 506
 507 void
 508 AudioMappingView::right_down (wxMouseEvent& ev)
 509 {
 510         auto channels = mouse_event_to_channels (ev);
 511         if (!channels) {
 512                 return;
 513         }
 514
 515         _menu_input = channels->first.index;
 516         _menu_output = channels->second.index;
 517         PopupMenu (_menu, ev.GetPosition());
 518 }
 519
 520 void
 521 AudioMappingView::mouse_wheel (wxMouseEvent& ev)
 522 {
 523         if (ev.ShiftDown()) {
 524                 _horizontal_scroll->SetThumbPosition (
 525                         _horizontal_scroll->GetThumbPosition() + (ev.GetWheelRotation() > 0 ? -HORIZONTAL_PAGE_SIZE : HORIZONTAL_PAGE_SIZE)
 526                         );
 527
 528         } else {
 529                 _vertical_scroll->SetThumbPosition (
 530                         _vertical_scroll->GetThumbPosition() + (ev.GetWheelRotation() > 0 ? -ROW_HEIGHT : ROW_HEIGHT)
 531                         );
 532         }
 533         Refresh ();
 534 }
 535
 536 /** Called when any gain value has changed */
 537 void
 538 AudioMappingView::map_values_changed ()
 539 {
 540         Changed (_map);
 541         _last_tooltip_channels = boost::none;
 542         Refresh ();
 543 }
 544
 545 void
 546 AudioMappingView::set_gain_from_menu (double linear)
 547 {
 548         _map.set (_menu_input, _menu_output, linear);
 549         map_values_changed ();
 550 }
 551
 552 void
 553 AudioMappingView::edit ()
 554 {
 555         auto dialog = new AudioGainDialog (this, _menu_input, _menu_output, _map.get(_menu_input, _menu_output));
 556         if (dialog->ShowModal() == wxID_OK) {
 557                 _map.set (_menu_input, _menu_output, dialog->value ());
 558                 map_values_changed ();
 559         }
 560
 561         dialog->Destroy ();
 562 }
 563
 564 void
 565 AudioMappingView::set (AudioMapping map)
 566 {
 567         _map = map;
 568         Refresh ();
 569 }
 570
 571 void
 572 AudioMappingView::set_input_channels (vector<NamedChannel> const& channels)
 573 {
 574         _input_channels = channels;
 575         setup ();
 576         Refresh ();
 577 }
 578
 579 void
 580 AudioMappingView::set_output_channels (vector<NamedChannel> const & channels)
 581 {
 582         _output_channels = channels;
 583         setup ();
 584         Refresh ();
 585 }
 586
 587
 588 wxString
 589 AudioMappingView::input_channel_name_with_group (NamedChannel const& n) const
 590 {
 591         optional<wxString> group;
 592         for (auto i: _input_groups) {
 593                 if (i.from <= n.index && n.index <= i.to) {
 594                         group = std_to_wx (i.name);
 595                 }
 596         }
 597
 598         if (group && !group->IsEmpty()) {
 599                 return wxString::Format ("%s/%s", group->data(), std_to_wx(n.name).data());
 600         }
 601
 602         return std_to_wx(n.name);
 603 }
 604
 605
 606 void
 607 AudioMappingView::motion (wxMouseEvent& ev)
 608 {
 609         auto channels = mouse_event_to_channels (ev);
 610         if (channels) {
 611                 if (channels != _last_tooltip_channels) {
 612                         wxString s;
 613                         auto const gain = _map.get(channels->first.index, channels->second.index);
 614                         if (gain == 0) {
 615                                 s = wxString::Format (
 616                                         _("No audio will be passed from %s channel '%s' to %s channel '%s'."),
 617                                         _from,
 618                                         input_channel_name_with_group(channels->first),
 619                                         _to,
 620                                         std_to_wx(channels->second.name)
 621                                         );
 622                         } else if (gain == 1) {
 623                                 s = wxString::Format (
 624                                         _("Audio will be passed from %s channel %s to %s channel %s unaltered."),
 625                                         _from,
 626                                         input_channel_name_with_group(channels->first),
 627                                         _to,
 628                                         std_to_wx(channels->second.name)
 629                                         );
 630                         } else {
 631                                 auto const dB = linear_to_db(gain);
 632                                 s = wxString::Format (
 633                                         _("Audio will be passed from %s channel %s to %s channel %s with gain %.1fdB."),
 634                                         _from,
 635                                         input_channel_name_with_group(channels->first),
 636                                         _to,
 637                                         std_to_wx(channels->second.name),
 638                                         dB
 639                                         );
 640                         }
 641
 642                         SetToolTip (s + " " + _("Right click to change gain."));
 643                 }
 644         } else {
 645                 auto group = mouse_event_to_input_group_name (ev);
 646                 if (group) {
 647                         SetToolTip (std_to_wx(*group));
 648                 } else {
 649                         SetToolTip ("");
 650                 }
 651         }
 652
 653         _last_tooltip_channels = channels;
 654         ev.Skip ();
 655 }
 656
 657 void
 658 AudioMappingView::set_input_groups (vector<Group> const & groups)
 659 {
 660         _input_groups = groups;
 661 }