pv/views/trace/analogsignal.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, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 #include <extdef.h>
  21
  22 #include <cassert>
  23 #include <cmath>
  24 #include <cstdlib>
  25 #include <limits>
  26 #include <vector>
  27
  28 #include <QApplication>
  29 #include <QCheckBox>
  30 #include <QComboBox>
  31 #include <QFormLayout>
  32 #include <QGridLayout>
  33 #include <QLabel>
  34 #include <QString>
  35
  36 #include "analogsignal.hpp"
  37 #include "logicsignal.hpp"
  38 #include "view.hpp"
  39
  40 #include "pv/data/analog.hpp"
  41 #include "pv/data/analogsegment.hpp"
  42 #include "pv/data/logic.hpp"
  43 #include "pv/data/logicsegment.hpp"
  44 #include "pv/data/signalbase.hpp"
  45 #include "pv/globalsettings.hpp"
  46
  47 #include <libsigrokcxx/libsigrokcxx.hpp>
  48
  49 using std::deque;
  50 using std::div;
  51 using std::div_t;
  52 using std::max;
  53 using std::make_pair;
  54 using std::min;
  55 using std::numeric_limits;
  56 using std::pair;
  57 using std::shared_ptr;
  58 using std::vector;
  59
  60 using pv::data::SignalBase;
  61
  62 namespace pv {
  63 namespace views {
  64 namespace trace {
  65
  66 const QColor AnalogSignal::SignalColours[4] = {
  67         QColor(0xC4, 0xA0, 0x00),       // Yellow
  68         QColor(0x87, 0x20, 0x7A),       // Magenta
  69         QColor(0x20, 0x4A, 0x87),       // Blue
  70         QColor(0x4E, 0x9A, 0x06)        // Green
  71 };
  72
  73 const QColor AnalogSignal::GridMajorColor = QColor(0, 0, 0, 40 * 256 / 100);
  74 const QColor AnalogSignal::GridMinorColor = QColor(0, 0, 0, 20 * 256 / 100);
  75
  76 const QColor AnalogSignal::SamplingPointColour(0x77, 0x77, 0x77);
  77
  78 const QColor AnalogSignal::ThresholdColor = QColor(0, 0, 0, 30 * 256 / 100);
  79
  80 const int64_t AnalogSignal::TracePaintBlockSize = 1024 * 1024;  // 4 MiB (due to float)
  81 const float AnalogSignal::EnvelopeThreshold = 64.0f;
  82
  83 const int AnalogSignal::MaximumVDivs = 10;
  84 const int AnalogSignal::MinScaleIndex = -6;
  85 const int AnalogSignal::MaxScaleIndex = 7;
  86
  87 const int AnalogSignal::InfoTextMarginRight = 20;
  88 const int AnalogSignal::InfoTextMarginBottom = 5;
  89
  90 AnalogSignal::AnalogSignal(
  91         pv::Session &session,
  92         shared_ptr<data::SignalBase> base) :
  93         Signal(session, base),
  94         scale_index_(4), // 20 per div
  95         scale_index_drag_offset_(0),
  96         pos_vdivs_(1),
  97         neg_vdivs_(1),
  98         resolution_(0),
  99         display_type_(DisplayBoth),
 100         autoranging_(true)
 101 {
 102         pv::data::Analog* analog_data =
 103                 dynamic_cast<pv::data::Analog*>(data().get());
 104
 105         connect(analog_data, SIGNAL(samples_added(QObject*, uint64_t, uint64_t)),
 106                 this, SLOT(on_samples_added()));
 107
 108         connect(&delayed_conversion_starter_, SIGNAL(timeout()),
 109                 this, SLOT(on_delayed_conversion_starter()));
 110         delayed_conversion_starter_.setSingleShot(true);
 111         delayed_conversion_starter_.setInterval(1000);  // 1s timeout
 112
 113         GlobalSettings gs;
 114         div_height_ = gs.value(GlobalSettings::Key_View_DefaultDivHeight).toInt();
 115
 116         base_->set_colour(SignalColours[base_->index() % countof(SignalColours)]);
 117         update_scale();
 118 }
 119
 120 shared_ptr<pv::data::SignalData> AnalogSignal::data() const
 121 {
 122         return base_->analog_data();
 123 }
 124
 125 void AnalogSignal::save_settings(QSettings &settings) const
 126 {
 127         settings.setValue("pos_vdivs", pos_vdivs_);
 128         settings.setValue("neg_vdivs", neg_vdivs_);
 129         settings.setValue("scale_index", scale_index_);
 130         settings.setValue("display_type", display_type_);
 131         settings.setValue("autoranging", autoranging_);
 132         settings.setValue("div_height", div_height_);
 133 }
 134
 135 void AnalogSignal::restore_settings(QSettings &settings)
 136 {
 137         if (settings.contains("pos_vdivs"))
 138                 pos_vdivs_ = settings.value("pos_vdivs").toInt();
 139
 140         if (settings.contains("neg_vdivs"))
 141                 neg_vdivs_ = settings.value("neg_vdivs").toInt();
 142
 143         if (settings.contains("scale_index")) {
 144                 scale_index_ = settings.value("scale_index").toInt();
 145                 update_scale();
 146         }
 147
 148         if (settings.contains("display_type"))
 149                 display_type_ = (DisplayType)(settings.value("display_type").toInt());
 150
 151         if (settings.contains("autoranging"))
 152                 autoranging_ = settings.value("autoranging").toBool();
 153
 154         if (settings.contains("div_height")) {
 155                 const int old_height = div_height_;
 156                 div_height_ = settings.value("div_height").toInt();
 157
 158                 if ((div_height_ != old_height) && owner_) {
 159                         // Call order is important, otherwise the lazy event handler won't work
 160                         owner_->extents_changed(false, true);
 161                         owner_->row_item_appearance_changed(false, true);
 162                 }
 163         }
 164 }
 165
 166 pair<int, int> AnalogSignal::v_extents() const
 167 {
 168         const int ph = pos_vdivs_ * div_height_;
 169         const int nh = neg_vdivs_ * div_height_;
 170         return make_pair(-ph, nh);
 171 }
 172
 173 int AnalogSignal::scale_handle_offset() const
 174 {
 175         const int h = (pos_vdivs_ + neg_vdivs_) * div_height_;
 176
 177         return ((scale_index_drag_offset_ - scale_index_) * h / 4) - h / 2;
 178 }
 179
 180 void AnalogSignal::scale_handle_dragged(int offset)
 181 {
 182         const int h = (pos_vdivs_ + neg_vdivs_) * div_height_;
 183
 184         scale_index_ = scale_index_drag_offset_ - (offset + h / 2) / (h / 4);
 185
 186         update_scale();
 187 }
 188
 189 void AnalogSignal::scale_handle_drag_release()
 190 {
 191         scale_index_drag_offset_ = scale_index_;
 192         update_scale();
 193 }
 194
 195 void AnalogSignal::paint_back(QPainter &p, ViewItemPaintParams &pp)
 196 {
 197         if (base_->enabled()) {
 198                 Trace::paint_back(p, pp);
 199                 paint_axis(p, pp, get_visual_y());
 200         }
 201 }
 202
 203 void AnalogSignal::paint_mid(QPainter &p, ViewItemPaintParams &pp)
 204 {
 205         assert(base_->analog_data());
 206         assert(owner_);
 207
 208         const int y = get_visual_y();
 209
 210         if (!base_->enabled())
 211                 return;
 212
 213         if ((display_type_ == DisplayAnalog) || (display_type_ == DisplayBoth)) {
 214                 paint_grid(p, y, pp.left(), pp.right());
 215
 216                 const deque< shared_ptr<pv::data::AnalogSegment> > &segments =
 217                         base_->analog_data()->analog_segments();
 218                 if (segments.empty())
 219                         return;
 220
 221                 const shared_ptr<pv::data::AnalogSegment> &segment =
 222                         segments.front();
 223
 224                 const double pixels_offset = pp.pixels_offset();
 225                 const double samplerate = max(1.0, segment->samplerate());
 226                 const pv::util::Timestamp& start_time = segment->start_time();
 227                 const int64_t last_sample = segment->get_sample_count() - 1;
 228                 const double samples_per_pixel = samplerate * pp.scale();
 229                 const pv::util::Timestamp start = samplerate * (pp.offset() - start_time);
 230                 const pv::util::Timestamp end = start + samples_per_pixel * pp.width();
 231
 232                 const int64_t start_sample = min(max(floor(start).convert_to<int64_t>(),
 233                         (int64_t)0), last_sample);
 234                 const int64_t end_sample = min(max((ceil(end) + 1).convert_to<int64_t>(),
 235                         (int64_t)0), last_sample);
 236
 237                 if (samples_per_pixel < EnvelopeThreshold)
 238                         paint_trace(p, segment, y, pp.left(),
 239                                 start_sample, end_sample,
 240                                 pixels_offset, samples_per_pixel);
 241                 else
 242                         paint_envelope(p, segment, y, pp.left(),
 243                                 start_sample, end_sample,
 244                                 pixels_offset, samples_per_pixel);
 245         }
 246
 247         const SignalBase::ConversionType conv_type = base_->get_conversion_type();
 248
 249         if (((conv_type == SignalBase::A2LConversionByThreshold) ||
 250                 (conv_type == SignalBase::A2LConversionBySchmittTrigger))) {
 251
 252                 if ((display_type_ == DisplayAnalog) || (display_type_ == DisplayBoth))
 253                         paint_conversion_thresholds(p, pp);
 254
 255                 if ((display_type_ == DisplayConverted) || (display_type_ == DisplayBoth))
 256                         paint_logic_mid(p, pp);
 257         }
 258 }
 259
 260 void AnalogSignal::paint_fore(QPainter &p, ViewItemPaintParams &pp)
 261 {
 262         if (!enabled())
 263                 return;
 264
 265         if ((display_type_ == DisplayAnalog) || (display_type_ == DisplayBoth)) {
 266                 const int y = get_visual_y();
 267
 268                 // Show the info section on the right side of the trace
 269                 const QString infotext = QString("%1 V/div").arg(resolution_);
 270
 271                 p.setPen(base_->colour());
 272                 p.setFont(QApplication::font());
 273
 274                 const QRectF bounding_rect = QRectF(pp.left(),
 275                                 y + v_extents().first,
 276                                 pp.width() - InfoTextMarginRight,
 277                                 v_extents().second - v_extents().first - InfoTextMarginBottom);
 278
 279                 p.drawText(bounding_rect, Qt::AlignRight | Qt::AlignBottom, infotext);
 280         }
 281 }
 282
 283 void AnalogSignal::paint_grid(QPainter &p, int y, int left, int right)
 284 {
 285         p.setRenderHint(QPainter::Antialiasing, false);
 286
 287         GlobalSettings settings;
 288         const bool show_analog_minor_grid =
 289                 settings.value(GlobalSettings::Key_View_ShowAnalogMinorGrid).toBool();
 290
 291         if (pos_vdivs_ > 0) {
 292                 p.setPen(QPen(GridMajorColor, 1, Qt::DashLine));
 293                 for (int i = 1; i <= pos_vdivs_; i++) {
 294                         const float dy = i * div_height_;
 295                         p.drawLine(QLineF(left, y - dy, right, y - dy));
 296                 }
 297         }
 298
 299         if ((pos_vdivs_ > 0) && show_analog_minor_grid) {
 300                 p.setPen(QPen(GridMinorColor, 1, Qt::DashLine));
 301                 for (int i = 0; i < pos_vdivs_; i++) {
 302                         const float dy = i * div_height_;
 303                         const float dy25 = dy + (0.25 * div_height_);
 304                         const float dy50 = dy + (0.50 * div_height_);
 305                         const float dy75 = dy + (0.75 * div_height_);
 306                         p.drawLine(QLineF(left, y - dy25, right, y - dy25));
 307                         p.drawLine(QLineF(left, y - dy50, right, y - dy50));
 308                         p.drawLine(QLineF(left, y - dy75, right, y - dy75));
 309                 }
 310         }
 311
 312         if (neg_vdivs_ > 0) {
 313                 p.setPen(QPen(GridMajorColor, 1, Qt::DashLine));
 314                 for (int i = 1; i <= neg_vdivs_; i++) {
 315                         const float dy = i * div_height_;
 316                         p.drawLine(QLineF(left, y + dy, right, y + dy));
 317                 }
 318         }
 319
 320         if ((pos_vdivs_ > 0) && show_analog_minor_grid) {
 321                 p.setPen(QPen(GridMinorColor, 1, Qt::DashLine));
 322                 for (int i = 0; i < neg_vdivs_; i++) {
 323                         const float dy = i * div_height_;
 324                         const float dy25 = dy + (0.25 * div_height_);
 325                         const float dy50 = dy + (0.50 * div_height_);
 326                         const float dy75 = dy + (0.75 * div_height_);
 327                         p.drawLine(QLineF(left, y + dy25, right, y + dy25));
 328                         p.drawLine(QLineF(left, y + dy50, right, y + dy50));
 329                         p.drawLine(QLineF(left, y + dy75, right, y + dy75));
 330                 }
 331         }
 332
 333         p.setRenderHint(QPainter::Antialiasing, true);
 334 }
 335
 336 void AnalogSignal::paint_trace(QPainter &p,
 337         const shared_ptr<pv::data::AnalogSegment> &segment,
 338         int y, int left, const int64_t start, const int64_t end,
 339         const double pixels_offset, const double samples_per_pixel)
 340 {
 341         if (end <= start)
 342                 return;
 343
 344         // Calculate and paint the sampling points if enabled and useful
 345         GlobalSettings settings;
 346         const bool show_sampling_points =
 347                 settings.value(GlobalSettings::Key_View_ShowSamplingPoints).toBool() &&
 348                 (samples_per_pixel < 0.25);
 349
 350         p.setPen(base_->colour());
 351
 352         const int64_t points_count = end - start;
 353
 354         QPointF *points = new QPointF[points_count];
 355         QPointF *point = points;
 356
 357         QRectF *sampling_points = nullptr;
 358         if (show_sampling_points)
 359                  sampling_points = new QRectF[points_count];
 360         QRectF *sampling_point = sampling_points;
 361
 362         int64_t sample_count = min(points_count, TracePaintBlockSize);
 363         int64_t block_sample = 0;
 364         float *sample_block = new float[TracePaintBlockSize];
 365         segment->get_samples(start, start + sample_count, sample_block);
 366
 367         const int w = 2;
 368         for (int64_t sample = start; sample != end; sample++, block_sample++) {
 369
 370                 if (block_sample == TracePaintBlockSize) {
 371                         block_sample = 0;
 372                         sample_count = min(points_count - sample, TracePaintBlockSize);
 373                         segment->get_samples(sample, sample + sample_count, sample_block);
 374                 }
 375
 376                 const float x = (sample / samples_per_pixel -
 377                         pixels_offset) + left;
 378
 379                 *point++ = QPointF(x, y - sample_block[block_sample] * scale_);
 380
 381                 if (show_sampling_points)
 382                         *sampling_point++ =
 383                                 QRectF(x - (w / 2), y - sample_block[block_sample] * scale_ - (w / 2), w, w);
 384         }
 385         delete[] sample_block;
 386
 387         p.drawPolyline(points, points_count);
 388
 389         if (show_sampling_points) {
 390                 p.setPen(SamplingPointColour);
 391                 p.drawRects(sampling_points, points_count);
 392                 delete[] sampling_points;
 393         }
 394
 395         delete[] points;
 396 }
 397
 398 void AnalogSignal::paint_envelope(QPainter &p,
 399         const shared_ptr<pv::data::AnalogSegment> &segment,
 400         int y, int left, const int64_t start, const int64_t end,
 401         const double pixels_offset, const double samples_per_pixel)
 402 {
 403         using pv::data::AnalogSegment;
 404
 405         AnalogSegment::EnvelopeSection e;
 406         segment->get_envelope_section(e, start, end, samples_per_pixel);
 407
 408         if (e.length < 2)
 409                 return;
 410
 411         p.setPen(QPen(Qt::NoPen));
 412         p.setBrush(base_->colour());
 413
 414         QRectF *const rects = new QRectF[e.length];
 415         QRectF *rect = rects;
 416
 417         for (uint64_t sample = 0; sample < e.length - 1; sample++) {
 418                 const float x = ((e.scale * sample + e.start) /
 419                         samples_per_pixel - pixels_offset) + left;
 420                 const AnalogSegment::EnvelopeSample *const s =
 421                         e.samples + sample;
 422
 423                 // We overlap this sample with the next so that vertical
 424                 // gaps do not appear during steep rising or falling edges
 425                 const float b = y - max(s->max, (s + 1)->min) * scale_;
 426                 const float t = y - min(s->min, (s + 1)->max) * scale_;
 427
 428                 float h = b - t;
 429                 if (h >= 0.0f && h <= 1.0f)
 430                         h = 1.0f;
 431                 if (h <= 0.0f && h >= -1.0f)
 432                         h = -1.0f;
 433
 434                 *rect++ = QRectF(x, t, 1.0f, h);
 435         }
 436
 437         p.drawRects(rects, e.length);
 438
 439         delete[] rects;
 440         delete[] e.samples;
 441 }
 442
 443 void AnalogSignal::paint_conversion_thresholds(QPainter &p,
 444         ViewItemPaintParams &pp)
 445 {
 446         if (!base_->enabled() || !base_->logic_data())
 447                 return;
 448
 449         // TODO Register a change handler instead of querying this with every repaint
 450         GlobalSettings settings;
 451         const bool show_conversion_thresholds =
 452                 settings.value(GlobalSettings::Key_View_ShowConversionThresholds).toBool();
 453
 454         if (!show_conversion_thresholds)
 455                 return;
 456
 457         const vector<double> thresholds = base_->get_conversion_thresholds();
 458         const int y = get_visual_y();
 459
 460         p.setRenderHint(QPainter::Antialiasing, false);
 461
 462         p.setPen(ThresholdColor);
 463
 464         if (thresholds.size() == 2) {
 465                 // Draw as hatched block because two thresholds denote lower/upper level
 466                 const double thr_y0 = y - thresholds[0] * scale_;
 467                 const double thr_y1 = y - thresholds[1] * scale_;
 468                 p.fillRect(QRect(pp.left(), thr_y0, pp.right(), thr_y1 - thr_y0),
 469                         QBrush(ThresholdColor, Qt::BDiagPattern));
 470         } else {
 471                 // Draw as individual lines
 472                 for (const double thr : thresholds) {
 473                         const double thr_y = y - thr * scale_;
 474                         p.drawLine(QPointF(pp.left(), thr_y), QPointF(pp.right(), thr_y));
 475                 }
 476         }
 477
 478         p.setRenderHint(QPainter::Antialiasing, true);
 479 }
 480
 481 void AnalogSignal::paint_logic_mid(QPainter &p, ViewItemPaintParams &pp)
 482 {
 483         QLineF *line;
 484
 485         vector< pair<int64_t, bool> > edges;
 486
 487         assert(base_);
 488
 489         const int y = get_visual_y();
 490
 491         if (!base_->enabled() || !base_->logic_data())
 492                 return;
 493
 494         const int signal_margin =
 495                 QFontMetrics(QApplication::font()).height() / 2;
 496
 497         const int ph = min(pos_vdivs_, 1) * div_height_;
 498         const int nh = min(neg_vdivs_, 1) * div_height_;
 499         const float high_offset = y - ph + signal_margin + 0.5f;
 500         const float low_offset = y + nh - signal_margin - 0.5f;
 501
 502         const deque< shared_ptr<pv::data::LogicSegment> > &segments =
 503                 base_->logic_data()->logic_segments();
 504
 505         if (segments.empty())
 506                 return;
 507
 508         const shared_ptr<pv::data::LogicSegment> &segment =
 509                 segments.front();
 510
 511         double samplerate = segment->samplerate();
 512
 513         // Show sample rate as 1Hz when it is unknown
 514         if (samplerate == 0.0)
 515                 samplerate = 1.0;
 516
 517         const double pixels_offset = pp.pixels_offset();
 518         const pv::util::Timestamp& start_time = segment->start_time();
 519         const int64_t last_sample = segment->get_sample_count() - 1;
 520         const double samples_per_pixel = samplerate * pp.scale();
 521         const double pixels_per_sample = 1 / samples_per_pixel;
 522         const pv::util::Timestamp start = samplerate * (pp.offset() - start_time);
 523         const pv::util::Timestamp end = start + samples_per_pixel * pp.width();
 524
 525         const int64_t start_sample = min(max(floor(start).convert_to<int64_t>(),
 526                 (int64_t)0), last_sample);
 527         const uint64_t end_sample = min(max(ceil(end).convert_to<int64_t>(),
 528                 (int64_t)0), last_sample);
 529
 530         segment->get_subsampled_edges(edges, start_sample, end_sample,
 531                 samples_per_pixel / LogicSignal::Oversampling, 0);
 532         assert(edges.size() >= 2);
 533
 534         // Check whether we need to paint the sampling points
 535         GlobalSettings settings;
 536         const bool show_sampling_points =
 537                 settings.value(GlobalSettings::Key_View_ShowSamplingPoints).toBool() &&
 538                 (samples_per_pixel < 0.25);
 539
 540         vector<QRectF> sampling_points;
 541         float sampling_point_x = 0.0f;
 542         int64_t sampling_point_sample = start_sample;
 543         const int w = 2;
 544
 545         if (show_sampling_points) {
 546                 sampling_points.reserve(end_sample - start_sample + 1);
 547                 sampling_point_x = (edges.cbegin()->first / samples_per_pixel - pixels_offset) + pp.left();
 548         }
 549
 550         // Paint the edges
 551         const unsigned int edge_count = edges.size() - 2;
 552         QLineF *const edge_lines = new QLineF[edge_count];
 553         line = edge_lines;
 554
 555         for (auto i = edges.cbegin() + 1; i != edges.cend() - 1; i++) {
 556                 const float x = ((*i).first / samples_per_pixel -
 557                         pixels_offset) + pp.left();
 558                 *line++ = QLineF(x, high_offset, x, low_offset);
 559
 560                 if (show_sampling_points)
 561                         while (sampling_point_sample < (*i).first) {
 562                                 const float y = (*i).second ? low_offset : high_offset;
 563                                 sampling_points.emplace_back(
 564                                         QRectF(sampling_point_x - (w / 2), y - (w / 2), w, w));
 565                                 sampling_point_sample++;
 566                                 sampling_point_x += pixels_per_sample;
 567                         };
 568         }
 569
 570         // Calculate the sample points from the last edge to the end of the trace
 571         if (show_sampling_points)
 572                 while ((uint64_t)sampling_point_sample <= end_sample) {
 573                         // Signal changed after the last edge, so the level is inverted
 574                         const float y = (edges.cend() - 1)->second ? high_offset : low_offset;
 575                         sampling_points.emplace_back(
 576                                 QRectF(sampling_point_x - (w / 2), y - (w / 2), w, w));
 577                         sampling_point_sample++;
 578                         sampling_point_x += pixels_per_sample;
 579                 };
 580
 581         p.setPen(LogicSignal::EdgeColour);
 582         p.drawLines(edge_lines, edge_count);
 583         delete[] edge_lines;
 584
 585         // Paint the caps
 586         const unsigned int max_cap_line_count = edges.size();
 587         QLineF *const cap_lines = new QLineF[max_cap_line_count];
 588
 589         p.setPen(LogicSignal::HighColour);
 590         paint_logic_caps(p, cap_lines, edges, true, samples_per_pixel,
 591                 pixels_offset, pp.left(), high_offset);
 592         p.setPen(LogicSignal::LowColour);
 593         paint_logic_caps(p, cap_lines, edges, false, samples_per_pixel,
 594                 pixels_offset, pp.left(), low_offset);
 595
 596         delete[] cap_lines;
 597
 598         // Paint the sampling points
 599         if (show_sampling_points) {
 600                 p.setPen(SamplingPointColour);
 601                 p.drawRects(sampling_points.data(), sampling_points.size());
 602         }
 603 }
 604
 605 void AnalogSignal::paint_logic_caps(QPainter &p, QLineF *const lines,
 606         vector< pair<int64_t, bool> > &edges, bool level,
 607         double samples_per_pixel, double pixels_offset, float x_offset,
 608         float y_offset)
 609 {
 610         QLineF *line = lines;
 611
 612         for (auto i = edges.begin(); i != (edges.end() - 1); i++)
 613                 if ((*i).second == level) {
 614                         *line++ = QLineF(
 615                                 ((*i).first / samples_per_pixel -
 616                                         pixels_offset) + x_offset, y_offset,
 617                                 ((*(i+1)).first / samples_per_pixel -
 618                                         pixels_offset) + x_offset, y_offset);
 619                 }
 620
 621         p.drawLines(lines, line - lines);
 622 }
 623
 624 float AnalogSignal::get_resolution(int scale_index)
 625 {
 626         const float seq[] = {1.0f, 2.0f, 5.0f};
 627
 628         const int offset = numeric_limits<int>::max() / (2 * countof(seq));
 629         const div_t d = div((int)(scale_index + countof(seq) * offset),
 630                 countof(seq));
 631
 632         return powf(10.0f, d.quot - offset) * seq[d.rem];
 633 }
 634
 635 void AnalogSignal::update_scale()
 636 {
 637         resolution_ = get_resolution(scale_index_);
 638         scale_ = div_height_ / resolution_;
 639 }
 640
 641 void AnalogSignal::update_conversion_widgets()
 642 {
 643         SignalBase::ConversionType conv_type = base_->get_conversion_type();
 644
 645         // Enable or disable widgets depending on conversion state
 646         conv_threshold_cb_->setEnabled(conv_type != SignalBase::NoConversion);
 647         display_type_cb_->setEnabled(conv_type != SignalBase::NoConversion);
 648
 649         conv_threshold_cb_->clear();
 650
 651         vector < pair<QString, int> > presets = base_->get_conversion_presets();
 652
 653         // Prevent the combo box from firing the "edit text changed" signal
 654         // as that would involuntarily select the first entry
 655         conv_threshold_cb_->blockSignals(true);
 656
 657         // Set available options depending on chosen conversion
 658         for (pair<QString, int> preset : presets)
 659                 conv_threshold_cb_->addItem(preset.first, preset.second);
 660
 661         map < QString, QVariant > options = base_->get_conversion_options();
 662
 663         if (conv_type == SignalBase::A2LConversionByThreshold) {
 664                 const vector<double> thresholds = base_->get_conversion_thresholds(
 665                                 SignalBase::A2LConversionByThreshold, true);
 666                 conv_threshold_cb_->addItem(
 667                                 QString("%1V").arg(QString::number(thresholds[0], 'f', 1)), -1);
 668         }
 669
 670         if (conv_type == SignalBase::A2LConversionBySchmittTrigger) {
 671                 const vector<double> thresholds = base_->get_conversion_thresholds(
 672                                 SignalBase::A2LConversionBySchmittTrigger, true);
 673                 conv_threshold_cb_->addItem(QString("%1V/%2V").arg(
 674                                 QString::number(thresholds[0], 'f', 1),
 675                                 QString::number(thresholds[1], 'f', 1)), -1);
 676         }
 677
 678         int preset_id = base_->get_current_conversion_preset();
 679         conv_threshold_cb_->setCurrentIndex(
 680                         conv_threshold_cb_->findData(preset_id));
 681
 682         conv_threshold_cb_->blockSignals(false);
 683 }
 684
 685 void AnalogSignal::perform_autoranging(bool keep_divs, bool force_update)
 686 {
 687         const deque< shared_ptr<pv::data::AnalogSegment> > &segments =
 688                 base_->analog_data()->analog_segments();
 689
 690         if (segments.empty())
 691                 return;
 692
 693         static double prev_min = 0, prev_max = 0;
 694         double min = 0, max = 0;
 695
 696         for (shared_ptr<pv::data::AnalogSegment> segment : segments) {
 697                 pair<double, double> mm = segment->get_min_max();
 698                 min = std::min(min, mm.first);
 699                 max = std::max(max, mm.second);
 700         }
 701
 702         if ((min == prev_min) && (max == prev_max) && !force_update)
 703                 return;
 704
 705         prev_min = min;
 706         prev_max = max;
 707
 708         // If we're allowed to alter the div assignment...
 709         if (!keep_divs) {
 710                 // Use all divs for the positive range if there are no negative values
 711                 if ((min == 0) && (neg_vdivs_ > 0)) {
 712                         pos_vdivs_ += neg_vdivs_;
 713                         neg_vdivs_ = 0;
 714                 }
 715
 716                 // Split up the divs if there are negative values but no negative divs
 717                 if ((min < 0) && (neg_vdivs_ == 0)) {
 718                         neg_vdivs_ = pos_vdivs_ / 2;
 719                         pos_vdivs_ -= neg_vdivs_;
 720                 }
 721         }
 722
 723         // If there is still no positive div when we need it, add one
 724         // (this can happen when pos_vdivs==neg_vdivs==0)
 725         if ((max > 0) && (pos_vdivs_ == 0)) {
 726                 pos_vdivs_ = 1;
 727                 owner_->extents_changed(false, true);
 728         }
 729
 730         // If there is still no negative div when we need it, add one
 731         // (this can happen when pos_vdivs was 0 or 1 when trying to split)
 732         if ((min < 0) && (neg_vdivs_ == 0)) {
 733                 neg_vdivs_ = 1;
 734                 owner_->extents_changed(false, true);
 735         }
 736
 737         double min_value_per_div;
 738         if ((pos_vdivs_ > 0) && (neg_vdivs_ >  0))
 739                 min_value_per_div = std::max(max / pos_vdivs_, -min / neg_vdivs_);
 740         else if (pos_vdivs_ > 0)
 741                 min_value_per_div = max / pos_vdivs_;
 742         else
 743                 min_value_per_div = -min / neg_vdivs_;
 744
 745         // Find first scale value that is bigger than the value we need
 746         for (int i = MinScaleIndex; i < MaxScaleIndex; i++)
 747                 if (get_resolution(i) > min_value_per_div) {
 748                         scale_index_ = i;
 749                         break;
 750                 }
 751
 752         update_scale();
 753 }
 754
 755 void AnalogSignal::populate_popup_form(QWidget *parent, QFormLayout *form)
 756 {
 757         // Add the standard options
 758         Signal::populate_popup_form(parent, form);
 759
 760         QFormLayout *const layout = new QFormLayout;
 761
 762         // Add div-related settings
 763         pvdiv_sb_ = new QSpinBox(parent);
 764         pvdiv_sb_->setRange(0, MaximumVDivs);
 765         pvdiv_sb_->setValue(pos_vdivs_);
 766         connect(pvdiv_sb_, SIGNAL(valueChanged(int)),
 767                 this, SLOT(on_pos_vdivs_changed(int)));
 768         layout->addRow(tr("Number of pos vertical divs"), pvdiv_sb_);
 769
 770         nvdiv_sb_ = new QSpinBox(parent);
 771         nvdiv_sb_->setRange(0, MaximumVDivs);
 772         nvdiv_sb_->setValue(neg_vdivs_);
 773         connect(nvdiv_sb_, SIGNAL(valueChanged(int)),
 774                 this, SLOT(on_neg_vdivs_changed(int)));
 775         layout->addRow(tr("Number of neg vertical divs"), nvdiv_sb_);
 776
 777         div_height_sb_ = new QSpinBox(parent);
 778         div_height_sb_->setRange(20, 1000);
 779         div_height_sb_->setSingleStep(5);
 780         div_height_sb_->setSuffix(tr(" pixels"));
 781         div_height_sb_->setValue(div_height_);
 782         connect(div_height_sb_, SIGNAL(valueChanged(int)),
 783                 this, SLOT(on_div_height_changed(int)));
 784         layout->addRow(tr("Div height"), div_height_sb_);
 785
 786         // Add the vertical resolution
 787         resolution_cb_ = new QComboBox(parent);
 788
 789         for (int i = MinScaleIndex; i < MaxScaleIndex; i++) {
 790                 const QString label = QString("%1").arg(get_resolution(i));
 791                 resolution_cb_->insertItem(0, label, QVariant(i));
 792         }
 793
 794         int cur_idx = resolution_cb_->findData(QVariant(scale_index_));
 795         resolution_cb_->setCurrentIndex(cur_idx);
 796
 797         connect(resolution_cb_, SIGNAL(currentIndexChanged(int)),
 798                 this, SLOT(on_resolution_changed(int)));
 799
 800         QGridLayout *const vdiv_layout = new QGridLayout;
 801         QLabel *const vdiv_unit = new QLabel(tr("V/div"));
 802         vdiv_layout->addWidget(resolution_cb_, 0, 0);
 803         vdiv_layout->addWidget(vdiv_unit, 0, 1);
 804
 805         layout->addRow(tr("Vertical resolution"), vdiv_layout);
 806
 807         // Add the autoranging checkbox
 808         QCheckBox* autoranging_cb = new QCheckBox();
 809         autoranging_cb->setCheckState(autoranging_ ? Qt::Checked : Qt::Unchecked);
 810
 811         connect(autoranging_cb, SIGNAL(stateChanged(int)),
 812                 this, SLOT(on_autoranging_changed(int)));
 813
 814         layout->addRow(tr("Autoranging"), autoranging_cb);
 815
 816         // Add the conversion type dropdown
 817         conversion_cb_ = new QComboBox();
 818
 819         conversion_cb_->addItem(tr("none"),
 820                 SignalBase::NoConversion);
 821         conversion_cb_->addItem(tr("to logic via threshold"),
 822                 SignalBase::A2LConversionByThreshold);
 823         conversion_cb_->addItem(tr("to logic via schmitt-trigger"),
 824                 SignalBase::A2LConversionBySchmittTrigger);
 825
 826         cur_idx = conversion_cb_->findData(QVariant(base_->get_conversion_type()));
 827         conversion_cb_->setCurrentIndex(cur_idx);
 828
 829         layout->addRow(tr("Conversion"), conversion_cb_);
 830
 831         connect(conversion_cb_, SIGNAL(currentIndexChanged(int)),
 832                 this, SLOT(on_conversion_changed(int)));
 833
 834     // Add the conversion threshold settings
 835     conv_threshold_cb_ = new QComboBox();
 836     conv_threshold_cb_->setEditable(true);
 837
 838     layout->addRow(tr("Conversion threshold(s)"), conv_threshold_cb_);
 839
 840     connect(conv_threshold_cb_, SIGNAL(currentIndexChanged(int)),
 841             this, SLOT(on_conv_threshold_changed(int)));
 842     connect(conv_threshold_cb_, SIGNAL(editTextChanged(const QString)),
 843             this, SLOT(on_conv_threshold_changed()));  // index will be -1
 844
 845         // Add the display type dropdown
 846         display_type_cb_ = new QComboBox();
 847
 848         display_type_cb_->addItem(tr("analog"), DisplayAnalog);
 849         display_type_cb_->addItem(tr("converted"), DisplayConverted);
 850         display_type_cb_->addItem(tr("analog+converted"), DisplayBoth);
 851
 852         cur_idx = display_type_cb_->findData(QVariant(display_type_));
 853         display_type_cb_->setCurrentIndex(cur_idx);
 854
 855         layout->addRow(tr("Show traces for"), display_type_cb_);
 856
 857         connect(display_type_cb_, SIGNAL(currentIndexChanged(int)),
 858                 this, SLOT(on_display_type_changed(int)));
 859
 860         // Update the conversion widget contents and states
 861         update_conversion_widgets();
 862
 863         form->addRow(layout);
 864 }
 865
 866 void AnalogSignal::on_samples_added()
 867 {
 868         perform_autoranging(false, false);
 869 }
 870
 871 void AnalogSignal::on_pos_vdivs_changed(int vdivs)
 872 {
 873         if (vdivs == pos_vdivs_)
 874                 return;
 875
 876         pos_vdivs_ = vdivs;
 877
 878         // There has to be at least one div, positive or negative
 879         if ((neg_vdivs_ == 0) && (pos_vdivs_ == 0)) {
 880                 pos_vdivs_ = 1;
 881                 if (pvdiv_sb_)
 882                         pvdiv_sb_->setValue(pos_vdivs_);
 883         }
 884
 885         if (autoranging_) {
 886                 perform_autoranging(true, true);
 887
 888                 // It could be that a positive or negative div was added, so update
 889                 if (pvdiv_sb_) {
 890                         pvdiv_sb_->setValue(pos_vdivs_);
 891                         nvdiv_sb_->setValue(neg_vdivs_);
 892                 }
 893         }
 894
 895         if (owner_) {
 896                 // Call order is important, otherwise the lazy event handler won't work
 897                 owner_->extents_changed(false, true);
 898                 owner_->row_item_appearance_changed(false, true);
 899         }
 900 }
 901
 902 void AnalogSignal::on_neg_vdivs_changed(int vdivs)
 903 {
 904         if (vdivs == neg_vdivs_)
 905                 return;
 906
 907         neg_vdivs_ = vdivs;
 908
 909         // There has to be at least one div, positive or negative
 910         if ((neg_vdivs_ == 0) && (pos_vdivs_ == 0)) {
 911                 pos_vdivs_ = 1;
 912                 if (pvdiv_sb_)
 913                         pvdiv_sb_->setValue(pos_vdivs_);
 914         }
 915
 916         if (autoranging_) {
 917                 perform_autoranging(true, true);
 918
 919                 // It could be that a positive or negative div was added, so update
 920                 if (pvdiv_sb_) {
 921                         pvdiv_sb_->setValue(pos_vdivs_);
 922                         nvdiv_sb_->setValue(neg_vdivs_);
 923                 }
 924         }
 925
 926         if (owner_) {
 927                 // Call order is important, otherwise the lazy event handler won't work
 928                 owner_->extents_changed(false, true);
 929                 owner_->row_item_appearance_changed(false, true);
 930         }
 931 }
 932
 933 void AnalogSignal::on_div_height_changed(int height)
 934 {
 935         div_height_ = height;
 936         update_scale();
 937
 938         if (owner_) {
 939                 // Call order is important, otherwise the lazy event handler won't work
 940                 owner_->extents_changed(false, true);
 941                 owner_->row_item_appearance_changed(false, true);
 942         }
 943 }
 944
 945 void AnalogSignal::on_resolution_changed(int index)
 946 {
 947         scale_index_ = resolution_cb_->itemData(index).toInt();
 948         update_scale();
 949
 950         if (owner_)
 951                 owner_->row_item_appearance_changed(false, true);
 952 }
 953
 954 void AnalogSignal::on_autoranging_changed(int state)
 955 {
 956         autoranging_ = (state == Qt::Checked);
 957
 958         if (autoranging_)
 959                 perform_autoranging(false, true);
 960
 961         if (owner_) {
 962                 // Call order is important, otherwise the lazy event handler won't work
 963                 owner_->extents_changed(false, true);
 964                 owner_->row_item_appearance_changed(false, true);
 965         }
 966 }
 967
 968 void AnalogSignal::on_conversion_changed(int index)
 969 {
 970         SignalBase::ConversionType old_conv_type = base_->get_conversion_type();
 971
 972         SignalBase::ConversionType conv_type =
 973                 (SignalBase::ConversionType)(conversion_cb_->itemData(index).toInt());
 974
 975         if (conv_type != old_conv_type) {
 976                 base_->set_conversion_type(conv_type);
 977                 update_conversion_widgets();
 978
 979                 if (owner_)
 980                         owner_->row_item_appearance_changed(false, true);
 981         }
 982 }
 983
 984 void AnalogSignal::on_conv_threshold_changed(int index)
 985 {
 986         SignalBase::ConversionType conv_type = base_->get_conversion_type();
 987
 988         // Note: index is set to -1 if the text in the combo box matches none of
 989         // the entries in the combo box
 990
 991         if ((index == -1) && (conv_threshold_cb_->currentText().length() == 0))
 992                 return;
 993
 994         // The combo box entry with the custom value has user_data set to -1
 995         const int user_data = conv_threshold_cb_->findText(
 996                         conv_threshold_cb_->currentText());
 997
 998         const bool use_custom_thr = (index == -1) || (user_data == -1);
 999
1000         if (conv_type == SignalBase::A2LConversionByThreshold && use_custom_thr) {
1001                 // Not one of the preset values, try to parse the combo box text
1002                 // Note: Regex loosely based on
1003                 // https://txt2re.com/index-c++.php3?s=0.1V&1&-13
1004                 QString re1 = "([+-]?\\d*[\\.,]?\\d*)"; // Float value
1005                 QString re2 = "([a-zA-Z]*)"; // SI unit
1006                 QRegExp regex(re1 + re2);
1007
1008                 const QString text = conv_threshold_cb_->currentText();
1009                 if (!regex.exactMatch(text))
1010                         return;  // String doesn't match the regex
1011
1012                 QStringList tokens = regex.capturedTexts();
1013
1014                 // For now, we simply assume that the unit is volt without modifiers
1015                 const double thr = tokens.at(1).toDouble();
1016
1017                 // Only restart the conversion if the threshold was updated
1018                 if (base_->set_conversion_option("threshold_value", thr))
1019                         delayed_conversion_starter_.start();
1020         }
1021
1022         if (conv_type == SignalBase::A2LConversionBySchmittTrigger && use_custom_thr) {
1023                 // Not one of the preset values, try to parse the combo box text
1024                 // Note: Regex loosely based on
1025                 // https://txt2re.com/index-c++.php3?s=0.1V/0.2V&2&14&-22&3&15
1026                 QString re1 = "([+-]?\\d*[\\.,]?\\d*)"; // Float value
1027                 QString re2 = "([a-zA-Z]*)"; // SI unit
1028                 QString re3 = "\\/"; // Forward slash, not captured
1029                 QString re4 = "([+-]?\\d*[\\.,]?\\d*)"; // Float value
1030                 QString re5 = "([a-zA-Z]*)"; // SI unit
1031                 QRegExp regex(re1 + re2 + re3 + re4 + re5);
1032
1033                 const QString text = conv_threshold_cb_->currentText();
1034                 if (!regex.exactMatch(text))
1035                         return;  // String doesn't match the regex
1036
1037                 QStringList tokens = regex.capturedTexts();
1038
1039                 // For now, we simply assume that the unit is volt without modifiers
1040                 const double low_thr = tokens.at(1).toDouble();
1041                 const double high_thr = tokens.at(3).toDouble();
1042
1043                 // Only restart the conversion if one of the options was updated
1044                 bool o1 = base_->set_conversion_option("threshold_value_low", low_thr);
1045                 bool o2 = base_->set_conversion_option("threshold_value_high", high_thr);
1046                 if (o1 || o2)
1047                         delayed_conversion_starter_.start();
1048         }
1049
1050         base_->set_conversion_preset(index);
1051
1052         // Immediately start the conversion if we're not asking for a delayed reaction
1053         if (!delayed_conversion_starter_.isActive())
1054                 base_->start_conversion();
1055 }
1056
1057 void AnalogSignal::on_delayed_conversion_starter()
1058 {
1059         base_->start_conversion();
1060 }
1061
1062 void AnalogSignal::on_display_type_changed(int index)
1063 {
1064         display_type_ = (DisplayType)(display_type_cb_->itemData(index).toInt());
1065
1066         if (owner_)
1067                 owner_->row_item_appearance_changed(false, true);
1068 }
1069
1070 } // namespace trace
1071 } // namespace views
1072 } // namespace pv