pv/view/decodetrace.cpp

   1 /*
   2  * This file is part of the PulseView project.
   3  *
   4  * Copyright (C) 2012 Joel Holdsworth <joel@airwebreathe.org.uk>
   5  *
   6  * This program 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  * This program 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 this program; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
  19  */
  20
  21 extern "C" {
  22 #include <libsigrokdecode/libsigrokdecode.h>
  23 }
  24
  25 #include <mutex>
  26
  27 #include <extdef.h>
  28
  29 #include <tuple>
  30
  31 #include <boost/functional/hash.hpp>
  32
  33 #include <QAction>
  34 #include <QApplication>
  35 #include <QComboBox>
  36 #include <QFormLayout>
  37 #include <QLabel>
  38 #include <QMenu>
  39 #include <QPushButton>
  40 #include <QToolTip>
  41
  42 #include "decodetrace.hpp"
  43
  44 #include <pv/session.hpp>
  45 #include <pv/data/decoderstack.hpp>
  46 #include <pv/data/decode/decoder.hpp>
  47 #include <pv/data/logic.hpp>
  48 #include <pv/data/logicsegment.hpp>
  49 #include <pv/data/decode/annotation.hpp>
  50 #include <pv/view/logicsignal.hpp>
  51 #include <pv/view/view.hpp>
  52 #include <pv/view/viewport.hpp>
  53 #include <pv/widgets/decodergroupbox.hpp>
  54 #include <pv/widgets/decodermenu.hpp>
  55
  56 using boost::shared_lock;
  57 using boost::shared_mutex;
  58 using std::dynamic_pointer_cast;
  59 using std::list;
  60 using std::lock_guard;
  61 using std::make_pair;
  62 using std::max;
  63 using std::make_pair;
  64 using std::map;
  65 using std::min;
  66 using std::pair;
  67 using std::shared_ptr;
  68 using std::tie;
  69 using std::unordered_set;
  70 using std::vector;
  71
  72 namespace pv {
  73 namespace view {
  74
  75 const QColor DecodeTrace::DecodeColours[4] = {
  76         QColor(0xEF, 0x29, 0x29),       // Red
  77         QColor(0xFC, 0xE9, 0x4F),       // Yellow
  78         QColor(0x8A, 0xE2, 0x34),       // Green
  79         QColor(0x72, 0x9F, 0xCF)        // Blue
  80 };
  81
  82 const QColor DecodeTrace::ErrorBgColour = QColor(0xEF, 0x29, 0x29);
  83 const QColor DecodeTrace::NoDecodeColour = QColor(0x88, 0x8A, 0x85);
  84
  85 const int DecodeTrace::ArrowSize = 4;
  86 const double DecodeTrace::EndCapWidth = 5;
  87 const int DecodeTrace::DrawPadding = 100;
  88
  89 const QColor DecodeTrace::Colours[16] = {
  90         QColor(0xEF, 0x29, 0x29),
  91         QColor(0xF6, 0x6A, 0x32),
  92         QColor(0xFC, 0xAE, 0x3E),
  93         QColor(0xFB, 0xCA, 0x47),
  94         QColor(0xFC, 0xE9, 0x4F),
  95         QColor(0xCD, 0xF0, 0x40),
  96         QColor(0x8A, 0xE2, 0x34),
  97         QColor(0x4E, 0xDC, 0x44),
  98         QColor(0x55, 0xD7, 0x95),
  99         QColor(0x64, 0xD1, 0xD2),
 100         QColor(0x72, 0x9F, 0xCF),
 101         QColor(0xD4, 0x76, 0xC4),
 102         QColor(0x9D, 0x79, 0xB9),
 103         QColor(0xAD, 0x7F, 0xA8),
 104         QColor(0xC2, 0x62, 0x9B),
 105         QColor(0xD7, 0x47, 0x6F)
 106 };
 107
 108 const QColor DecodeTrace::OutlineColours[16] = {
 109         QColor(0x77, 0x14, 0x14),
 110         QColor(0x7B, 0x35, 0x19),
 111         QColor(0x7E, 0x57, 0x1F),
 112         QColor(0x7D, 0x65, 0x23),
 113         QColor(0x7E, 0x74, 0x27),
 114         QColor(0x66, 0x78, 0x20),
 115         QColor(0x45, 0x71, 0x1A),
 116         QColor(0x27, 0x6E, 0x22),
 117         QColor(0x2A, 0x6B, 0x4A),
 118         QColor(0x32, 0x68, 0x69),
 119         QColor(0x39, 0x4F, 0x67),
 120         QColor(0x6A, 0x3B, 0x62),
 121         QColor(0x4E, 0x3C, 0x5C),
 122         QColor(0x56, 0x3F, 0x54),
 123         QColor(0x61, 0x31, 0x4D),
 124         QColor(0x6B, 0x23, 0x37)
 125 };
 126
 127 DecodeTrace::DecodeTrace(pv::Session &session,
 128         std::shared_ptr<pv::data::DecoderStack> decoder_stack, int index) :
 129         Trace(QString::fromUtf8(
 130                 decoder_stack->stack().front()->decoder()->name)),
 131         session_(session),
 132         decoder_stack_(decoder_stack),
 133         row_height_(0),
 134         delete_mapper_(this),
 135         show_hide_mapper_(this)
 136 {
 137         assert(decoder_stack_);
 138
 139         colour_ = DecodeColours[index % countof(DecodeColours)];
 140
 141         connect(decoder_stack_.get(), SIGNAL(new_decode_data()),
 142                 this, SLOT(on_new_decode_data()));
 143         connect(&delete_mapper_, SIGNAL(mapped(int)),
 144                 this, SLOT(on_delete_decoder(int)));
 145         connect(&show_hide_mapper_, SIGNAL(mapped(int)),
 146                 this, SLOT(on_show_hide_decoder(int)));
 147 }
 148
 149 bool DecodeTrace::enabled() const
 150 {
 151         return true;
 152 }
 153
 154 const std::shared_ptr<pv::data::DecoderStack>& DecodeTrace::decoder() const
 155 {
 156         return decoder_stack_;
 157 }
 158
 159 pair<int, int> DecodeTrace::v_extents() const
 160 {
 161         /// @todo Replace this with an implementation that knows the true
 162         /// height of the trace
 163         const int row_height = (ViewItemPaintParams::text_height() * 6) / 4;
 164         return make_pair(-row_height / 2, row_height * 7 / 2);
 165 }
 166
 167 void DecodeTrace::paint_back(QPainter &p, const ViewItemPaintParams &pp)
 168 {
 169         Trace::paint_back(p, pp);
 170         paint_axis(p, pp, get_visual_y());
 171 }
 172
 173 void DecodeTrace::paint_mid(QPainter &p, const ViewItemPaintParams &pp)
 174 {
 175         using namespace pv::data::decode;
 176
 177         const int text_height = ViewItemPaintParams::text_height();
 178         row_height_ = (text_height * 6) / 4;
 179         const int annotation_height = (text_height * 5) / 4;
 180
 181         assert(decoder_stack_);
 182         const QString err = decoder_stack_->error_message();
 183         if (!err.isEmpty())
 184         {
 185                 draw_unresolved_period(
 186                         p, annotation_height, pp.left(), pp.right());
 187                 draw_error(p, err, pp);
 188                 return;
 189         }
 190
 191         // Iterate through the rows
 192         int y = get_visual_y();
 193         pair<uint64_t, uint64_t> sample_range = get_sample_range(
 194                 pp.left(), pp.right());
 195
 196         assert(decoder_stack_);
 197         const vector<Row> rows(decoder_stack_->get_visible_rows());
 198
 199         visible_rows_.clear();
 200         for (size_t i = 0; i < rows.size(); i++)
 201         {
 202                 const Row &row = rows[i];
 203
 204                 size_t base_colour = 0x13579BDF;
 205                 boost::hash_combine(base_colour, this);
 206                 boost::hash_combine(base_colour, row.decoder());
 207                 boost::hash_combine(base_colour, row.row());
 208                 base_colour >>= 16;
 209
 210                 vector<Annotation> annotations;
 211                 decoder_stack_->get_annotation_subset(annotations, row,
 212                         sample_range.first, sample_range.second);
 213                 if (!annotations.empty()) {
 214                         for (const Annotation &a : annotations)
 215                                 draw_annotation(a, p, annotation_height,
 216                                         pp, y, base_colour);
 217                         y += row_height_;
 218
 219                         visible_rows_.push_back(rows[i]);
 220                 }
 221         }
 222
 223         // Draw the hatching
 224         draw_unresolved_period(p, annotation_height, pp.left(), pp.right());
 225 }
 226
 227 void DecodeTrace::paint_fore(QPainter &p, const ViewItemPaintParams &pp)
 228 {
 229         using namespace pv::data::decode;
 230
 231         assert(row_height_);
 232
 233         for (size_t i = 0; i < visible_rows_.size(); i++)
 234         {
 235                 const int y = i * row_height_ + get_visual_y();
 236
 237                 p.setPen(QPen(Qt::NoPen));
 238                 p.setBrush(QApplication::palette().brush(QPalette::WindowText));
 239
 240                 if (i != 0)
 241                 {
 242                         const QPointF points[] = {
 243                                 QPointF(pp.left(), y - ArrowSize),
 244                                 QPointF(pp.left() + ArrowSize, y),
 245                                 QPointF(pp.left(), y + ArrowSize)
 246                         };
 247                         p.drawPolygon(points, countof(points));
 248                 }
 249
 250                 const QRect r(pp.left() + ArrowSize * 2, y - row_height_ / 2,
 251                         pp.right() - pp.left(), row_height_);
 252                 const QString h(visible_rows_[i].title());
 253                 const int f = Qt::AlignLeft | Qt::AlignVCenter |
 254                         Qt::TextDontClip;
 255
 256                 // Draw the outline
 257                 p.setPen(QApplication::palette().color(QPalette::Base));
 258                 for (int dx = -1; dx <= 1; dx++)
 259                         for (int dy = -1; dy <= 1; dy++)
 260                                 if (dx != 0 && dy != 0)
 261                                         p.drawText(r.translated(dx, dy), f, h);
 262
 263                 // Draw the text
 264                 p.setPen(QApplication::palette().color(QPalette::WindowText));
 265                 p.drawText(r, f, h);
 266         }
 267 }
 268
 269 void DecodeTrace::populate_popup_form(QWidget *parent, QFormLayout *form)
 270 {
 271         using pv::data::decode::Decoder;
 272
 273         assert(form);
 274         assert(parent);
 275         assert(decoder_stack_);
 276
 277         // Add the standard options
 278         Trace::populate_popup_form(parent, form);
 279
 280         // Add the decoder options
 281         bindings_.clear();
 282         channel_selectors_.clear();
 283         decoder_forms_.clear();
 284
 285         const list< shared_ptr<Decoder> >& stack = decoder_stack_->stack();
 286
 287         if (stack.empty())
 288         {
 289                 QLabel *const l = new QLabel(
 290                         tr("<p><i>No decoders in the stack</i></p>"));
 291                 l->setAlignment(Qt::AlignCenter);
 292                 form->addRow(l);
 293         }
 294         else
 295         {
 296                 auto iter = stack.cbegin();
 297                 for (int i = 0; i < (int)stack.size(); i++, iter++) {
 298                         shared_ptr<Decoder> dec(*iter);
 299                         create_decoder_form(i, dec, parent, form);
 300                 }
 301
 302                 form->addRow(new QLabel(
 303                         tr("<i>* Required channels</i>"), parent));
 304         }
 305
 306         // Add stacking button
 307         pv::widgets::DecoderMenu *const decoder_menu =
 308                 new pv::widgets::DecoderMenu(parent);
 309         connect(decoder_menu, SIGNAL(decoder_selected(srd_decoder*)),
 310                 this, SLOT(on_stack_decoder(srd_decoder*)));
 311
 312         QPushButton *const stack_button =
 313                 new QPushButton(tr("Stack Decoder"), parent);
 314         stack_button->setMenu(decoder_menu);
 315
 316         QHBoxLayout *stack_button_box = new QHBoxLayout;
 317         stack_button_box->addWidget(stack_button, 0, Qt::AlignRight);
 318         form->addRow(stack_button_box);
 319 }
 320
 321 QMenu* DecodeTrace::create_context_menu(QWidget *parent)
 322 {
 323         QMenu *const menu = Trace::create_context_menu(parent);
 324
 325         menu->addSeparator();
 326
 327         QAction *const del = new QAction(tr("Delete"), this);
 328         del->setShortcuts(QKeySequence::Delete);
 329         connect(del, SIGNAL(triggered()), this, SLOT(on_delete()));
 330         menu->addAction(del);
 331
 332         return menu;
 333 }
 334
 335 void DecodeTrace::draw_annotation(const pv::data::decode::Annotation &a,
 336         QPainter &p, int h, const ViewItemPaintParams &pp, int y,
 337         size_t base_colour) const
 338 {
 339         double samples_per_pixel, pixels_offset;
 340         tie(pixels_offset, samples_per_pixel) =
 341                 get_pixels_offset_samples_per_pixel();
 342
 343         const double start = a.start_sample() / samples_per_pixel -
 344                 pixels_offset;
 345         const double end = a.end_sample() / samples_per_pixel -
 346                 pixels_offset;
 347
 348         const size_t colour = (base_colour + a.format()) % countof(Colours);
 349         const QColor &fill = Colours[colour];
 350         const QColor &outline = OutlineColours[colour];
 351
 352         if (start > pp.right() + DrawPadding || end < pp.left() - DrawPadding)
 353                 return;
 354
 355         if (a.start_sample() == a.end_sample())
 356                 draw_instant(a, p, fill, outline, h, start, y);
 357         else
 358                 draw_range(a, p, fill, outline, h, start, end, y);
 359 }
 360
 361 void DecodeTrace::draw_instant(const pv::data::decode::Annotation &a, QPainter &p,
 362         QColor fill, QColor outline, int h, double x, int y) const
 363 {
 364         const QString text = a.annotations().empty() ?
 365                 QString() : a.annotations().back();
 366         const double w = min((double)p.boundingRect(QRectF(), 0, text).width(),
 367                 0.0) + h;
 368         const QRectF rect(x - w / 2, y - h / 2, w, h);
 369
 370         p.setPen(outline);
 371         p.setBrush(fill);
 372         p.drawRoundedRect(rect, h / 2, h / 2);
 373
 374         p.setPen(Qt::black);
 375         p.drawText(rect, Qt::AlignCenter | Qt::AlignVCenter, text);
 376 }
 377
 378 void DecodeTrace::draw_range(const pv::data::decode::Annotation &a, QPainter &p,
 379         QColor fill, QColor outline, int h, double start,
 380         double end, int y) const
 381 {
 382         const double top = y + .5 - h / 2;
 383         const double bottom = y + .5 + h / 2;
 384         const vector<QString> annotations = a.annotations();
 385
 386         p.setPen(outline);
 387         p.setBrush(fill);
 388
 389         // If the two ends are within 1 pixel, draw a vertical line
 390         if (start + 1.0 > end)
 391         {
 392                 p.drawLine(QPointF(start, top), QPointF(start, bottom));
 393                 return;
 394         }
 395
 396         const double cap_width = min((end - start) / 4, EndCapWidth);
 397
 398         QPointF pts[] = {
 399                 QPointF(start, y + .5f),
 400                 QPointF(start + cap_width, top),
 401                 QPointF(end - cap_width, top),
 402                 QPointF(end, y + .5f),
 403                 QPointF(end - cap_width, bottom),
 404                 QPointF(start + cap_width, bottom)
 405         };
 406
 407         p.drawConvexPolygon(pts, countof(pts));
 408
 409         if (annotations.empty())
 410                 return;
 411
 412         QRectF rect(start + cap_width, y - h / 2,
 413                 end - start - cap_width * 2, h);
 414         if (rect.width() <= 4)
 415                 return;
 416
 417         p.setPen(Qt::black);
 418
 419         // Try to find an annotation that will fit
 420         QString best_annotation;
 421         int best_width = 0;
 422
 423         for (const QString &a : annotations) {
 424                 const int w = p.boundingRect(QRectF(), 0, a).width();
 425                 if (w <= rect.width() && w > best_width)
 426                         best_annotation = a, best_width = w;
 427         }
 428
 429         if (best_annotation.isEmpty())
 430                 best_annotation = annotations.back();
 431
 432         // If not ellide the last in the list
 433         p.drawText(rect, Qt::AlignCenter, p.fontMetrics().elidedText(
 434                 best_annotation, Qt::ElideRight, rect.width()));
 435 }
 436
 437 void DecodeTrace::draw_error(QPainter &p, const QString &message,
 438         const ViewItemPaintParams &pp)
 439 {
 440         const int y = get_visual_y();
 441
 442         p.setPen(ErrorBgColour.darker());
 443         p.setBrush(ErrorBgColour);
 444
 445         const QRectF bounding_rect =
 446                 QRectF(pp.width(), INT_MIN / 2 + y, pp.width(), INT_MAX);
 447         const QRectF text_rect = p.boundingRect(bounding_rect,
 448                 Qt::AlignCenter, message);
 449         const float r = text_rect.height() / 4;
 450
 451         p.drawRoundedRect(text_rect.adjusted(-r, -r, r, r), r, r,
 452                 Qt::AbsoluteSize);
 453
 454         p.setPen(Qt::black);
 455         p.drawText(text_rect, message);
 456 }
 457
 458 void DecodeTrace::draw_unresolved_period(QPainter &p, int h, int left,
 459         int right) const
 460 {
 461         using namespace pv::data;
 462         using pv::data::decode::Decoder;
 463
 464         double samples_per_pixel, pixels_offset;
 465
 466         assert(decoder_stack_);
 467
 468         shared_ptr<Logic> data;
 469         shared_ptr<LogicSignal> logic_signal;
 470
 471         const list< shared_ptr<Decoder> > &stack = decoder_stack_->stack();
 472
 473         // We get the logic data of the first channel in the list.
 474         // This works because we are currently assuming all
 475         // LogicSignals have the same data/segment
 476         for (const shared_ptr<Decoder> &dec : stack)
 477                 if (dec && !dec->channels().empty() &&
 478                         ((logic_signal = (*dec->channels().begin()).second)) &&
 479                         ((data = logic_signal->logic_data())))
 480                         break;
 481
 482         if (!data || data->logic_segments().empty())
 483                 return;
 484
 485         const shared_ptr<LogicSegment> segment =
 486                 data->logic_segments().front();
 487         assert(segment);
 488         const int64_t sample_count = (int64_t)segment->get_sample_count();
 489         if (sample_count == 0)
 490                 return;
 491
 492         const int64_t samples_decoded = decoder_stack_->samples_decoded();
 493         if (sample_count == samples_decoded)
 494                 return;
 495
 496         const int y = get_visual_y();
 497
 498         tie(pixels_offset, samples_per_pixel) =
 499                 get_pixels_offset_samples_per_pixel();
 500
 501         const double start = max(samples_decoded /
 502                 samples_per_pixel - pixels_offset, left - 1.0);
 503         const double end = min(sample_count / samples_per_pixel -
 504                 pixels_offset, right + 1.0);
 505         const QRectF no_decode_rect(start, y - h/2 + 0.5, end - start, h);
 506
 507         p.setPen(QPen(Qt::NoPen));
 508         p.setBrush(Qt::white);
 509         p.drawRect(no_decode_rect);
 510
 511         p.setPen(NoDecodeColour);
 512         p.setBrush(QBrush(NoDecodeColour, Qt::Dense6Pattern));
 513         p.drawRect(no_decode_rect);
 514 }
 515
 516 pair<double, double> DecodeTrace::get_pixels_offset_samples_per_pixel() const
 517 {
 518         assert(owner_);
 519         assert(decoder_stack_);
 520
 521         const View *view = owner_->view();
 522         assert(view);
 523
 524         const double scale = view->scale();
 525         assert(scale > 0);
 526
 527         const double pixels_offset =
 528                 ((view->offset() - decoder_stack_->start_time()) / scale).convert_to<double>();
 529
 530         double samplerate = decoder_stack_->samplerate();
 531
 532         // Show sample rate as 1Hz when it is unknown
 533         if (samplerate == 0.0)
 534                 samplerate = 1.0;
 535
 536         return make_pair(pixels_offset, samplerate * scale);
 537 }
 538
 539 pair<uint64_t, uint64_t> DecodeTrace::get_sample_range(
 540         int x_start, int x_end) const
 541 {
 542         double samples_per_pixel, pixels_offset;
 543         tie(pixels_offset, samples_per_pixel) =
 544                 get_pixels_offset_samples_per_pixel();
 545
 546         const uint64_t start = (uint64_t)max(
 547                 (x_start + pixels_offset) * samples_per_pixel, 0.0);
 548         const uint64_t end = (uint64_t)max(
 549                 (x_end + pixels_offset) * samples_per_pixel, 0.0);
 550
 551         return make_pair(start, end);
 552 }
 553
 554 int DecodeTrace::get_row_at_point(const QPoint &point)
 555 {
 556         if (!row_height_)
 557                 return -1;
 558
 559         const int y = (point.y() - get_visual_y() + row_height_ / 2);
 560
 561         /* Integer divison of (x-1)/x would yield 0, so we check for this. */
 562         if (y < 0)
 563                 return -1;
 564
 565         const int row = y / row_height_;
 566
 567         if (row >= (int)visible_rows_.size())
 568                 return -1;
 569
 570         return row;
 571 }
 572
 573 const QString DecodeTrace::get_annotation_at_point(const QPoint &point)
 574 {
 575         using namespace pv::data::decode;
 576
 577         if (!enabled())
 578                 return QString();
 579
 580         const pair<uint64_t, uint64_t> sample_range =
 581                 get_sample_range(point.x(), point.x() + 1);
 582         const int row = get_row_at_point(point);
 583         if (row < 0)
 584                 return QString();
 585
 586         vector<pv::data::decode::Annotation> annotations;
 587
 588         assert(decoder_stack_);
 589         decoder_stack_->get_annotation_subset(annotations, visible_rows_[row],
 590                 sample_range.first, sample_range.second);
 591
 592         return (annotations.empty()) ?
 593                 QString() : annotations[0].annotations().front();
 594 }
 595
 596 void DecodeTrace::hover_point_changed()
 597 {
 598         assert(owner_);
 599
 600         const View *const view = owner_->view();
 601         assert(view);
 602
 603         QPoint hp = view->hover_point();
 604         QString ann = get_annotation_at_point(hp);
 605
 606         assert(view);
 607
 608         if (!row_height_ || ann.isEmpty()) {
 609                 QToolTip::hideText();
 610                 return;
 611         }
 612
 613         const int hover_row = get_row_at_point(hp);
 614
 615         QFontMetrics m(QToolTip::font());
 616         const QRect text_size = m.boundingRect(QRect(), 0, ann);
 617
 618         // This is OS-specific and unfortunately we can't query it, so
 619         // use an approximation to at least try to minimize the error.
 620         const int padding = 8;
 621
 622         // Make sure the tool tip doesn't overlap with the mouse cursor.
 623         // If it did, the tool tip would constantly hide and re-appear.
 624         // We also push it up by one row so that it appears above the
 625         // decode trace, not below.
 626         hp.setX(hp.x() - (text_size.width() / 2) - padding);
 627
 628         hp.setY(get_visual_y() - (row_height_ / 2) +
 629                 (hover_row * row_height_) -
 630                 row_height_ - text_size.height() - padding);
 631
 632         QToolTip::showText(view->viewport()->mapToGlobal(hp), ann);
 633 }
 634
 635 void DecodeTrace::create_decoder_form(int index,
 636         shared_ptr<data::decode::Decoder> &dec, QWidget *parent,
 637         QFormLayout *form)
 638 {
 639         const GSList *l;
 640
 641         assert(dec);
 642         const srd_decoder *const decoder = dec->decoder();
 643         assert(decoder);
 644
 645         const bool decoder_deletable = index > 0;
 646
 647         pv::widgets::DecoderGroupBox *const group =
 648                 new pv::widgets::DecoderGroupBox(
 649                         QString::fromUtf8(decoder->name), nullptr, decoder_deletable);
 650         group->set_decoder_visible(dec->shown());
 651
 652         if (decoder_deletable) {
 653                 delete_mapper_.setMapping(group, index);
 654                 connect(group, SIGNAL(delete_decoder()), &delete_mapper_, SLOT(map()));
 655         }
 656
 657         show_hide_mapper_.setMapping(group, index);
 658         connect(group, SIGNAL(show_hide_decoder()),
 659                 &show_hide_mapper_, SLOT(map()));
 660
 661         QFormLayout *const decoder_form = new QFormLayout;
 662         group->add_layout(decoder_form);
 663
 664         // Add the mandatory channels
 665         for (l = decoder->channels; l; l = l->next) {
 666                 const struct srd_channel *const pdch =
 667                         (struct srd_channel *)l->data;
 668                 QComboBox *const combo = create_channel_selector(parent, dec, pdch);
 669                 connect(combo, SIGNAL(currentIndexChanged(int)),
 670                         this, SLOT(on_channel_selected(int)));
 671                 decoder_form->addRow(tr("<b>%1</b> (%2) *")
 672                         .arg(QString::fromUtf8(pdch->name))
 673                         .arg(QString::fromUtf8(pdch->desc)), combo);
 674
 675                 const ChannelSelector s = {combo, dec, pdch};
 676                 channel_selectors_.push_back(s);
 677         }
 678
 679         // Add the optional channels
 680         for (l = decoder->opt_channels; l; l = l->next) {
 681                 const struct srd_channel *const pdch =
 682                         (struct srd_channel *)l->data;
 683                 QComboBox *const combo = create_channel_selector(parent, dec, pdch);
 684                 connect(combo, SIGNAL(currentIndexChanged(int)),
 685                         this, SLOT(on_channel_selected(int)));
 686                 decoder_form->addRow(tr("<b>%1</b> (%2)")
 687                         .arg(QString::fromUtf8(pdch->name))
 688                         .arg(QString::fromUtf8(pdch->desc)), combo);
 689
 690                 const ChannelSelector s = {combo, dec, pdch};
 691                 channel_selectors_.push_back(s);
 692         }
 693
 694         // Add the options
 695         shared_ptr<binding::Decoder> binding(
 696                 new binding::Decoder(decoder_stack_, dec));
 697         binding->add_properties_to_form(decoder_form, true);
 698
 699         bindings_.push_back(binding);
 700
 701         form->addRow(group);
 702         decoder_forms_.push_back(group);
 703 }
 704
 705 QComboBox* DecodeTrace::create_channel_selector(
 706         QWidget *parent, const shared_ptr<data::decode::Decoder> &dec,
 707         const srd_channel *const pdch)
 708 {
 709         assert(dec);
 710
 711         shared_lock<shared_mutex> lock(session_.signals_mutex());
 712         const auto &sigs(session_.signals());
 713
 714         vector< shared_ptr<Signal> > sig_list(sigs.begin(), sigs.end());
 715         std::sort(sig_list.begin(), sig_list.end(),
 716                 [](const shared_ptr<Signal> &a, const shared_ptr<Signal> b) {
 717                         return a->name().compare(b->name()) < 0; });
 718
 719         assert(decoder_stack_);
 720         const auto channel_iter = dec->channels().find(pdch);
 721
 722         QComboBox *selector = new QComboBox(parent);
 723
 724         selector->addItem("-", qVariantFromValue((void*)nullptr));
 725
 726         if (channel_iter == dec->channels().end())
 727                 selector->setCurrentIndex(0);
 728
 729         for (const shared_ptr<view::Signal> &s : sig_list) {
 730                 assert(s);
 731                 if (dynamic_pointer_cast<LogicSignal>(s) && s->enabled())
 732                 {
 733                         selector->addItem(s->name(),
 734                                 qVariantFromValue((void*)s.get()));
 735                         if ((*channel_iter).second == s)
 736                                 selector->setCurrentIndex(
 737                                         selector->count() - 1);
 738                 }
 739         }
 740
 741         return selector;
 742 }
 743
 744 void DecodeTrace::commit_decoder_channels(shared_ptr<data::decode::Decoder> &dec)
 745 {
 746         assert(dec);
 747
 748         map<const srd_channel*, shared_ptr<LogicSignal> > channel_map;
 749
 750         shared_lock<shared_mutex> lock(session_.signals_mutex());
 751         const unordered_set< shared_ptr<Signal> > &sigs(session_.signals());
 752
 753         for (const ChannelSelector &s : channel_selectors_)
 754         {
 755                 if (s.decoder_ != dec)
 756                         break;
 757
 758                 const LogicSignal *const selection =
 759                         (LogicSignal*)s.combo_->itemData(
 760                                 s.combo_->currentIndex()).value<void*>();
 761
 762                 for (shared_ptr<Signal> sig : sigs)
 763                         if (sig.get() == selection) {
 764                                 channel_map[s.pdch_] =
 765                                         dynamic_pointer_cast<LogicSignal>(sig);
 766                                 break;
 767                         }
 768         }
 769
 770         dec->set_channels(channel_map);
 771 }
 772
 773 void DecodeTrace::commit_channels()
 774 {
 775         assert(decoder_stack_);
 776         for (shared_ptr<data::decode::Decoder> dec : decoder_stack_->stack())
 777                 commit_decoder_channels(dec);
 778
 779         decoder_stack_->begin_decode();
 780 }
 781
 782 void DecodeTrace::on_new_decode_data()
 783 {
 784         if (owner_)
 785                 owner_->row_item_appearance_changed(false, true);
 786 }
 787
 788 void DecodeTrace::delete_pressed()
 789 {
 790         on_delete();
 791 }
 792
 793 void DecodeTrace::on_delete()
 794 {
 795         session_.remove_decode_signal(this);
 796 }
 797
 798 void DecodeTrace::on_channel_selected(int)
 799 {
 800         commit_channels();
 801 }
 802
 803 void DecodeTrace::on_stack_decoder(srd_decoder *decoder)
 804 {
 805         assert(decoder);
 806         assert(decoder_stack_);
 807         decoder_stack_->push(shared_ptr<data::decode::Decoder>(
 808                 new data::decode::Decoder(decoder)));
 809         decoder_stack_->begin_decode();
 810
 811         create_popup_form();
 812 }
 813
 814 void DecodeTrace::on_delete_decoder(int index)
 815 {
 816         decoder_stack_->remove(index);
 817
 818         // Update the popup
 819         create_popup_form();
 820
 821         decoder_stack_->begin_decode();
 822 }
 823
 824 void DecodeTrace::on_show_hide_decoder(int index)
 825 {
 826         using pv::data::decode::Decoder;
 827
 828         const list< shared_ptr<Decoder> > stack(decoder_stack_->stack());
 829
 830         // Find the decoder in the stack
 831         auto iter = stack.cbegin();
 832         for (int i = 0; i < index; i++, iter++)
 833                 assert(iter != stack.end());
 834
 835         shared_ptr<Decoder> dec = *iter;
 836         assert(dec);
 837
 838         const bool show = !dec->shown();
 839         dec->show(show);
 840
 841         assert(index < (int)decoder_forms_.size());
 842         decoder_forms_[index]->set_decoder_visible(show);
 843
 844         if (owner_)
 845                 owner_->row_item_appearance_changed(false, true);
 846 }
 847
 848 } // namespace view
 849 } // namespace pv