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         if (_input_groups.empty()) {
 284                 auto const bottom = TOP_HEIGHT + _input_channels.size() * ROW_HEIGHT;
 285                 dc.DrawLine(wxPoint(MINIMUM_COLUMN_WIDTH, bottom), wxPoint(MINIMUM_COLUMN_WIDTH * 2, bottom));
 286         }
 287
 288         /* Group labels and lines; be careful here as wxDCClipper does not restore the old
 289          * clipping rectangle after it is destroyed
 290          */
 291         y = TOP_HEIGHT;
 292         for (auto const& i: _input_groups) {
 293                 int const height = (i.to - i.from + 1) * ROW_HEIGHT;
 294                 dc.GetTextExtent (std_to_wx(i.name), &label_width, &label_height);
 295                 if (label_width > height) {
 296                         label_width = height - 8;
 297                 }
 298
 299                 {
 300                         wxDCClipper clip (dc, wxRect(MINIMUM_COLUMN_WIDTH, y, ROW_HEIGHT, height));
 301                         int yp = y;
 302                         if ((yp - 2 * ROW_HEIGHT) < dc.GetLogicalOrigin().y) {
 303                                 yp += dc.GetLogicalOrigin().y;
 304                         }
 305
 306                         dc.DrawRotatedText (
 307                                 std_to_wx(i.name),
 308                                 ROW_HEIGHT + (ROW_HEIGHT - label_height) / 2,
 309                                 y + (height + label_width) / 2,
 310                                 90
 311                                 );
 312                 }
 313
 314                 y += height;
 315         }
 316 }
 317
 318
 319 void
 320 AudioMappingView::paint_row_lines (wxDC& dc)
 321 {
 322         for (size_t i = 0; i < _input_channels.size(); ++i) {
 323                 dc.DrawLine (
 324                         wxPoint(MINIMUM_COLUMN_WIDTH * 2, TOP_HEIGHT + ROW_HEIGHT * i),
 325                         wxPoint(LEFT_WIDTH + _column_widths_total, TOP_HEIGHT + ROW_HEIGHT * i)
 326                         );
 327         }
 328         dc.DrawLine (
 329                 wxPoint(MINIMUM_COLUMN_WIDTH * 2, TOP_HEIGHT + ROW_HEIGHT * _input_channels.size()),
 330                 wxPoint(LEFT_WIDTH + _column_widths_total, TOP_HEIGHT + ROW_HEIGHT * _input_channels.size())
 331                 );
 332 }
 333
 334
 335 void
 336 AudioMappingView::paint_indicators (wxDC& dc)
 337 {
 338         /* _{input,output}_channels and _map may not always be in sync, be careful here */
 339         size_t const output = min(_output_channels.size(), size_t(_map.output_channels()));
 340         size_t const input = min(_input_channels.size(), size_t(_map.input_channels()));
 341
 342         int xp = LEFT_WIDTH;
 343         for (size_t x = 0; x < output; ++x) {
 344                 for (size_t y = 0; y < input; ++y) {
 345                         dc.SetBrush (*wxWHITE_BRUSH);
 346                         dc.DrawRectangle (
 347                                 wxRect(
 348                                         xp + (_column_widths[x] - INDICATOR_SIZE) / 2,
 349                                         TOP_HEIGHT + y * ROW_HEIGHT + (ROW_HEIGHT - INDICATOR_SIZE) / 2,
 350                                         INDICATOR_SIZE, INDICATOR_SIZE
 351                                         )
 352                                 );
 353
 354                         float const value_dB = linear_to_db(_map.get(_input_channels[y].index, _output_channels[x].index));
 355                         auto const colour = value_dB <= 0 ? wxColour(0, 255, 0) : wxColour(255, 150, 0);
 356                         int const range = 18;
 357                         int height = 0;
 358                         if (value_dB > -range) {
 359                                 height = min(INDICATOR_SIZE, static_cast<int>(INDICATOR_SIZE * (1 + value_dB / range)));
 360                         }
 361
 362                         dc.SetBrush (*wxTheBrushList->FindOrCreateBrush(colour, wxBRUSHSTYLE_SOLID));
 363                         dc.DrawRectangle (
 364                                 wxRect(
 365                                         xp + (_column_widths[x] - INDICATOR_SIZE) / 2,
 366                                         TOP_HEIGHT + y * ROW_HEIGHT + (ROW_HEIGHT - INDICATOR_SIZE) / 2 + INDICATOR_SIZE - height,
 367                                         INDICATOR_SIZE, height
 368                                         )
 369                                 );
 370
 371                 }
 372                 xp += _column_widths[x];
 373         }
 374 }
 375
 376
 377 static
 378 void restore (wxDC& dc)
 379 {
 380         dc.SetLogicalOrigin (0, 0);
 381         dc.DestroyClippingRegion ();
 382 }
 383
 384
 385 void
 386 AudioMappingView::paint ()
 387 {
 388         wxPaintDC dc (_body);
 389
 390         int const hs = _horizontal_scroll->GetThumbPosition ();
 391         int const vs = _vertical_scroll->GetThumbPosition ();
 392
 393         paint_static (dc);
 394
 395         dc.SetClippingRegion (
 396                 LEFT_WIDTH,
 397                 0,
 398                 _column_widths_total,
 399                 ROW_HEIGHT * (2 + _input_channels.size())
 400                 );
 401         dc.SetLogicalOrigin (hs, 0);
 402         paint_column_labels (dc);
 403         restore (dc);
 404
 405         dc.SetClippingRegion(
 406                 0,
 407                 TOP_HEIGHT,
 408                 LEFT_WIDTH,
 409                 min(int(ROW_HEIGHT * _input_channels.size()), GetSize().GetHeight() - TOP_HEIGHT) + 1
 410              );
 411         dc.SetLogicalOrigin  (0, vs);
 412         paint_row_labels (dc);
 413         restore (dc);
 414
 415         dc.SetClippingRegion(
 416                 MINIMUM_COLUMN_WIDTH * 2,
 417                 TOP_HEIGHT,
 418                 MINIMUM_COLUMN_WIDTH + _column_widths_total,
 419                 min(int(ROW_HEIGHT * (2 + _input_channels.size())), GetSize().GetHeight() - TOP_HEIGHT)
 420              );
 421         dc.SetLogicalOrigin (hs, vs);
 422         paint_row_lines (dc);
 423         restore (dc);
 424
 425         dc.SetClippingRegion(
 426                 LEFT_WIDTH,
 427                 MINIMUM_COLUMN_WIDTH,
 428                 MINIMUM_COLUMN_WIDTH + _column_widths_total,
 429                 min(int(ROW_HEIGHT * (1 + _input_channels.size())), GetSize().GetHeight() - ROW_HEIGHT)
 430              );
 431         dc.SetLogicalOrigin(hs, vs);
 432         paint_column_lines (dc);
 433         restore (dc);
 434
 435         dc.SetClippingRegion (
 436                 LEFT_WIDTH,
 437                 TOP_HEIGHT,
 438                 _column_widths_total,
 439                 min(int(ROW_HEIGHT * _input_channels.size()), GetSize().GetHeight() - TOP_HEIGHT)
 440              );
 441         dc.SetLogicalOrigin(hs, vs);
 442         paint_indicators (dc);
 443         restore (dc);
 444 }
 445
 446
 447 optional<pair<NamedChannel, NamedChannel>>
 448 AudioMappingView::mouse_event_to_channels (wxMouseEvent& ev) const
 449 {
 450         int x = ev.GetX() + _horizontal_scroll->GetThumbPosition();
 451         int const y = ev.GetY() + _vertical_scroll->GetThumbPosition();
 452
 453         if (x <= LEFT_WIDTH || y < TOP_HEIGHT) {
 454                 return {};
 455         }
 456
 457         int const input = (y - TOP_HEIGHT) / ROW_HEIGHT;
 458
 459         x -= LEFT_WIDTH;
 460         int output = 0;
 461         for (auto const i: _column_widths) {
 462                 x -= i;
 463                 if (x < 0) {
 464                         break;
 465                 }
 466                 ++output;
 467         }
 468
 469         if (input >= int(_input_channels.size()) || output >= int(_output_channels.size())) {
 470                 return {};
 471         }
 472
 473         return make_pair(_input_channels[input], _output_channels[output]);
 474 }
 475
 476 optional<string>
 477 AudioMappingView::mouse_event_to_input_group_name (wxMouseEvent& ev) const
 478 {
 479         int const x = ev.GetX() + _horizontal_scroll->GetThumbPosition();
 480         if (x < MINIMUM_COLUMN_WIDTH || x > (2 * MINIMUM_COLUMN_WIDTH)) {
 481                 return {};
 482         }
 483
 484         int const y = (ev.GetY() + _vertical_scroll->GetThumbPosition() - TOP_HEIGHT) / ROW_HEIGHT;
 485         for (auto i: _input_groups) {
 486                 if (i.from <= y && y <= i.to) {
 487                         return i.name;
 488                 }
 489         }
 490
 491         return {};
 492 }
 493
 494 void
 495 AudioMappingView::left_down (wxMouseEvent& ev)
 496 {
 497         auto channels = mouse_event_to_channels (ev);
 498         if (!channels) {
 499                 return;
 500         }
 501
 502         if (_map.get(channels->first.index, channels->second.index) > 0) {
 503                 _map.set (channels->first.index, channels->second.index, 0);
 504         } else {
 505                 _map.set (channels->first.index, channels->second.index, 1);
 506         }
 507
 508         map_values_changed ();
 509 }
 510
 511 void
 512 AudioMappingView::right_down (wxMouseEvent& ev)
 513 {
 514         auto channels = mouse_event_to_channels (ev);
 515         if (!channels) {
 516                 return;
 517         }
 518
 519         _menu_input = channels->first.index;
 520         _menu_output = channels->second.index;
 521         PopupMenu (_menu, ev.GetPosition());
 522 }
 523
 524 void
 525 AudioMappingView::mouse_wheel (wxMouseEvent& ev)
 526 {
 527         if (ev.ShiftDown()) {
 528                 _horizontal_scroll->SetThumbPosition (
 529                         _horizontal_scroll->GetThumbPosition() + (ev.GetWheelRotation() > 0 ? -HORIZONTAL_PAGE_SIZE : HORIZONTAL_PAGE_SIZE)
 530                         );
 531
 532         } else {
 533                 _vertical_scroll->SetThumbPosition (
 534                         _vertical_scroll->GetThumbPosition() + (ev.GetWheelRotation() > 0 ? -ROW_HEIGHT : ROW_HEIGHT)
 535                         );
 536         }
 537         Refresh ();
 538 }
 539
 540 /** Called when any gain value has changed */
 541 void
 542 AudioMappingView::map_values_changed ()
 543 {
 544         Changed (_map);
 545         _last_tooltip_channels = boost::none;
 546         Refresh ();
 547 }
 548
 549 void
 550 AudioMappingView::set_gain_from_menu (double linear)
 551 {
 552         _map.set (_menu_input, _menu_output, linear);
 553         map_values_changed ();
 554 }
 555
 556 void
 557 AudioMappingView::edit ()
 558 {
 559         auto dialog = make_wx<AudioGainDialog>(this, _menu_input, _menu_output, _map.get(_menu_input, _menu_output));
 560         if (dialog->ShowModal() == wxID_OK) {
 561                 _map.set (_menu_input, _menu_output, dialog->value ());
 562                 map_values_changed ();
 563         }
 564 }
 565
 566 void
 567 AudioMappingView::set (AudioMapping map)
 568 {
 569         _map = map;
 570         Refresh ();
 571 }
 572
 573 void
 574 AudioMappingView::set_input_channels (vector<NamedChannel> const& channels)
 575 {
 576         _input_channels = channels;
 577         setup ();
 578         Refresh ();
 579 }
 580
 581 void
 582 AudioMappingView::set_output_channels (vector<NamedChannel> const & channels)
 583 {
 584         _output_channels = channels;
 585         setup ();
 586         Refresh ();
 587 }
 588
 589
 590 wxString
 591 AudioMappingView::input_channel_name_with_group (NamedChannel const& n) const
 592 {
 593         optional<wxString> group;
 594         for (auto i: _input_groups) {
 595                 if (i.from <= n.index && n.index <= i.to) {
 596                         group = std_to_wx (i.name);
 597                 }
 598         }
 599
 600         if (group && !group->IsEmpty()) {
 601                 return wxString::Format ("%s/%s", group->data(), std_to_wx(n.name).data());
 602         }
 603
 604         return std_to_wx(n.name);
 605 }
 606
 607
 608 void
 609 AudioMappingView::motion (wxMouseEvent& ev)
 610 {
 611         auto channels = mouse_event_to_channels (ev);
 612         if (channels) {
 613                 if (channels != _last_tooltip_channels) {
 614                         wxString s;
 615                         auto const gain = _map.get(channels->first.index, channels->second.index);
 616                         if (gain == 0) {
 617                                 s = wxString::Format (
 618                                         _("No audio will be passed from %s channel '%s' to %s channel '%s'."),
 619                                         _from,
 620                                         input_channel_name_with_group(channels->first),
 621                                         _to,
 622                                         std_to_wx(channels->second.name)
 623                                         );
 624                         } else if (gain == 1) {
 625                                 s = wxString::Format (
 626                                         _("Audio will be passed from %s channel %s to %s channel %s unaltered."),
 627                                         _from,
 628                                         input_channel_name_with_group(channels->first),
 629                                         _to,
 630                                         std_to_wx(channels->second.name)
 631                                         );
 632                         } else {
 633                                 auto const dB = linear_to_db(gain);
 634                                 s = wxString::Format (
 635                                         _("Audio will be passed from %s channel %s to %s channel %s with gain %.1fdB."),
 636                                         _from,
 637                                         input_channel_name_with_group(channels->first),
 638                                         _to,
 639                                         std_to_wx(channels->second.name),
 640                                         dB
 641                                         );
 642                         }
 643
 644                         SetToolTip (s + " " + _("Right click to change gain."));
 645                 }
 646         } else {
 647                 auto group = mouse_event_to_input_group_name (ev);
 648                 if (group) {
 649                         SetToolTip (std_to_wx(*group));
 650                 } else {
 651                         SetToolTip ("");
 652                 }
 653         }
 654
 655         _last_tooltip_channels = channels;
 656         ev.Skip ();
 657 }
 658
 659 void
 660 AudioMappingView::set_input_groups (vector<Group> const & groups)
 661 {
 662         _input_groups = groups;
 663 }