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