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 <QDebug>
  32 #include <QFormLayout>
  33 #include <QGridLayout>
  34 #include <QLabel>
  35 #include <QString>
  36
  37 #include "analogsignal.hpp"
  38 #include "logicsignal.hpp"
  39 #include "view.hpp"
  40
  41 #include "pv/data/analog.hpp"
  42 #include "pv/data/analogsegment.hpp"
  43 #include "pv/data/logic.hpp"
  44 #include "pv/data/logicsegment.hpp"
  45 #include "pv/data/signalbase.hpp"
  46 #include "pv/globalsettings.hpp"
  47
  48 #include <libsigrokcxx/libsigrokcxx.hpp>
  49
  50 using std::bind;
  51 using std::deque;
  52 using std::div;
  53 using std::div_t;
  54 using std::max;
  55 using std::make_pair;
  56 using std::min;
  57 using std::numeric_limits;
  58 using std::out_of_range;
  59 using std::pair;
  60 using std::placeholders::_1;
  61 using std::shared_ptr;
  62 using std::vector;
  63
  64 using pv::data::SignalBase;
  65
  66 namespace pv {
  67 namespace views {
  68 namespace trace {
  69
  70 const QColor AnalogSignal::SignalColours[4] = {
  71         QColor(0xC4, 0xA0, 0x00),       // Yellow
  72         QColor(0x87, 0x20, 0x7A),       // Magenta
  73         QColor(0x20, 0x4A, 0x87),       // Blue
  74         QColor(0x4E, 0x9A, 0x06)        // Green
  75 };
  76
  77 const QPen AnalogSignal::AxisPen(QColor(0, 0, 0, 30 * 256 / 100), 2);
  78 const QColor AnalogSignal::GridMajorColor = QColor(0, 0, 0, 40 * 256 / 100);
  79 const QColor AnalogSignal::GridMinorColor = QColor(0, 0, 0, 20 * 256 / 100);
  80
  81 const QColor AnalogSignal::SamplingPointColour(0x77, 0x77, 0x77);
  82 const QColor AnalogSignal::SamplingPointColourLo = QColor(200, 0, 0, 80 * 256 / 100);
  83 const QColor AnalogSignal::SamplingPointColourNe = QColor(0,   0, 0, 80 * 256 / 100);
  84 const QColor AnalogSignal::SamplingPointColourHi = QColor(0, 200, 0, 80 * 256 / 100);
  85
  86 const QColor AnalogSignal::ThresholdColor = QColor(0, 0, 0, 30 * 256 / 100);
  87 const QColor AnalogSignal::ThresholdColorLo = QColor(255, 0, 0, 8 * 256 / 100);
  88 const QColor AnalogSignal::ThresholdColorNe = QColor(0,   0, 0, 10 * 256 / 100);
  89 const QColor AnalogSignal::ThresholdColorHi = QColor(0, 255, 0, 8 * 256 / 100);
  90
  91 const int64_t AnalogSignal::TracePaintBlockSize = 1024 * 1024;  // 4 MiB (due to float)
  92 const float AnalogSignal::EnvelopeThreshold = 64.0f;
  93
  94 const int AnalogSignal::MaximumVDivs = 10;
  95 const int AnalogSignal::MinScaleIndex = -6;
  96 const int AnalogSignal::MaxScaleIndex = 7;
  97
  98 const int AnalogSignal::InfoTextMarginRight = 20;
  99 const int AnalogSignal::InfoTextMarginBottom = 5;
 100
 101 AnalogSignal::AnalogSignal(
 102         pv::Session &session,
 103         shared_ptr<data::SignalBase> base) :
 104         Signal(session, base),
 105         scale_index_(4), // 20 per div
 106         scale_index_drag_offset_(0),
 107         pos_vdivs_(1),
 108         neg_vdivs_(1),
 109         resolution_(0),
 110         display_type_(DisplayBoth),
 111         autoranging_(true)
 112 {
 113         axis_pen_ = AxisPen;
 114
 115         pv::data::Analog* analog_data =
 116                 dynamic_cast<pv::data::Analog*>(data().get());
 117
 118         connect(analog_data, SIGNAL(min_max_changed(float, float)),
 119                 this, SLOT(on_min_max_changed(float, float)));
 120
 121         GlobalSettings::add_change_handler(this);
 122
 123         GlobalSettings gs;
 124         conversion_threshold_disp_mode_ =
 125                 gs.value(GlobalSettings::Key_View_ConversionThresholdDispMode).toInt();
 126
 127         div_height_ = gs.value(GlobalSettings::Key_View_DefaultDivHeight).toInt();
 128
 129         base_->set_colour(SignalColours[base_->index() % countof(SignalColours)]);
 130         update_scale();
 131 }
 132
 133 AnalogSignal::~AnalogSignal()
 134 {
 135         GlobalSettings::remove_change_handler(this);
 136 }
 137
 138 shared_ptr<pv::data::SignalData> AnalogSignal::data() const
 139 {
 140         return base_->analog_data();
 141 }
 142
 143 void AnalogSignal::save_settings(QSettings &settings) const
 144 {
 145         settings.setValue("pos_vdivs", pos_vdivs_);
 146         settings.setValue("neg_vdivs", neg_vdivs_);
 147         settings.setValue("scale_index", scale_index_);
 148         settings.setValue("display_type", display_type_);
 149         settings.setValue("autoranging", autoranging_);
 150         settings.setValue("div_height", div_height_);
 151 }
 152
 153 void AnalogSignal::restore_settings(QSettings &settings)
 154 {
 155         if (settings.contains("pos_vdivs"))
 156                 pos_vdivs_ = settings.value("pos_vdivs").toInt();
 157
 158         if (settings.contains("neg_vdivs"))
 159                 neg_vdivs_ = settings.value("neg_vdivs").toInt();
 160
 161         if (settings.contains("scale_index")) {
 162                 scale_index_ = settings.value("scale_index").toInt();
 163                 update_scale();
 164         }
 165
 166         if (settings.contains("display_type"))
 167                 display_type_ = (DisplayType)(settings.value("display_type").toInt());
 168
 169         if (settings.contains("autoranging"))
 170                 autoranging_ = settings.value("autoranging").toBool();
 171
 172         if (settings.contains("div_height")) {
 173                 const int old_height = div_height_;
 174                 div_height_ = settings.value("div_height").toInt();
 175
 176                 if ((div_height_ != old_height) && owner_) {
 177                         // Call order is important, otherwise the lazy event handler won't work
 178                         owner_->extents_changed(false, true);
 179                         owner_->row_item_appearance_changed(false, true);
 180                 }
 181         }
 182 }
 183
 184 pair<int, int> AnalogSignal::v_extents() const
 185 {
 186         const int ph = pos_vdivs_ * div_height_;
 187         const int nh = neg_vdivs_ * div_height_;
 188         return make_pair(-ph, nh);
 189 }
 190
 191 int AnalogSignal::scale_handle_offset() const
 192 {
 193         const int h = (pos_vdivs_ + neg_vdivs_) * div_height_;
 194
 195         return ((scale_index_drag_offset_ - scale_index_) * h / 4) - h / 2;
 196 }
 197
 198 void AnalogSignal::scale_handle_dragged(int offset)
 199 {
 200         const int h = (pos_vdivs_ + neg_vdivs_) * div_height_;
 201
 202         scale_index_ = scale_index_drag_offset_ - (offset + h / 2) / (h / 4);
 203
 204         update_scale();
 205 }
 206
 207 void AnalogSignal::scale_handle_drag_release()
 208 {
 209         scale_index_drag_offset_ = scale_index_;
 210         update_scale();
 211 }
 212
 213 void AnalogSignal::on_setting_changed(const QString &key, const QVariant &value)
 214 {
 215         if (key == GlobalSettings::Key_View_ConversionThresholdDispMode)
 216                 on_settingViewConversionThresholdDispMode_changed(value);
 217 }
 218
 219 void AnalogSignal::paint_back(QPainter &p, ViewItemPaintParams &pp)
 220 {
 221         if (!base_->enabled())
 222                 return;
 223
 224         bool paint_thr_bg =
 225                 conversion_threshold_disp_mode_ == GlobalSettings::ConvThrDispMode_Background;
 226
 227         const vector<double> thresholds = base_->get_conversion_thresholds();
 228
 229         // Only display thresholds if we have some and we show analog samples
 230         if ((thresholds.size() > 0) && paint_thr_bg &&
 231                 ((display_type_ == DisplayAnalog) || (display_type_ == DisplayBoth))) {
 232
 233                 const int visual_y = get_visual_y();
 234                 const pair<int, int> extents = v_extents();
 235                 const int top = visual_y + extents.first;
 236                 const int btm = visual_y + extents.second;
 237
 238                 // Draw high/neutral/low areas
 239                 if (thresholds.size() == 2) {
 240                         int thr_lo = visual_y - thresholds[0] * scale_;
 241                         int thr_hi = visual_y - thresholds[1] * scale_;
 242                         thr_lo = min(max(thr_lo, top), btm);
 243                         thr_hi = min(max(thr_hi, top), btm);
 244
 245                         p.fillRect(QRectF(pp.left(), top, pp.width(), thr_hi - top),
 246                                 QBrush(ThresholdColorHi));
 247                         p.fillRect(QRectF(pp.left(), thr_hi, pp.width(), thr_lo - thr_hi),
 248                                 QBrush(ThresholdColorNe));
 249                         p.fillRect(QRectF(pp.left(), thr_lo, pp.width(), btm - thr_lo),
 250                                 QBrush(ThresholdColorLo));
 251                 } else {
 252                         int thr = visual_y - thresholds[0] * scale_;
 253                         thr = min(max(thr, top), btm);
 254
 255                         p.fillRect(QRectF(pp.left(), top, pp.width(), thr - top),
 256                                 QBrush(ThresholdColorHi));
 257                         p.fillRect(QRectF(pp.left(), thr, pp.width(), btm - thr),
 258                                 QBrush(ThresholdColorLo));
 259                 }
 260
 261                 paint_axis(p, pp, get_visual_y());
 262         } else {
 263                 Trace::paint_back(p, pp);
 264                 paint_axis(p, pp, get_visual_y());
 265         }
 266 }
 267
 268 void AnalogSignal::paint_mid(QPainter &p, ViewItemPaintParams &pp)
 269 {
 270         assert(base_->analog_data());
 271         assert(owner_);
 272
 273         const int y = get_visual_y();
 274
 275         if (!base_->enabled())
 276                 return;
 277
 278         if ((display_type_ == DisplayAnalog) || (display_type_ == DisplayBoth)) {
 279                 paint_grid(p, y, pp.left(), pp.right());
 280
 281                 shared_ptr<pv::data::AnalogSegment> segment = get_analog_segment_to_paint();
 282                 if (!segment)
 283                         return;
 284
 285                 const double pixels_offset = pp.pixels_offset();
 286                 const double samplerate = max(1.0, segment->samplerate());
 287                 const pv::util::Timestamp& start_time = segment->start_time();
 288                 const int64_t last_sample = segment->get_sample_count() - 1;
 289                 const double samples_per_pixel = samplerate * pp.scale();
 290                 const pv::util::Timestamp start = samplerate * (pp.offset() - start_time);
 291                 const pv::util::Timestamp end = start + samples_per_pixel * pp.width();
 292
 293                 const int64_t start_sample = min(max(floor(start).convert_to<int64_t>(),
 294                         (int64_t)0), last_sample);
 295                 const int64_t end_sample = min(max((ceil(end) + 1).convert_to<int64_t>(),
 296                         (int64_t)0), last_sample);
 297
 298                 if (samples_per_pixel < EnvelopeThreshold)
 299                         paint_trace(p, segment, y, pp.left(),
 300                                 start_sample, end_sample,
 301                                 pixels_offset, samples_per_pixel);
 302                 else
 303                         paint_envelope(p, segment, y, pp.left(),
 304                                 start_sample, end_sample,
 305                                 pixels_offset, samples_per_pixel);
 306         }
 307
 308         if ((display_type_ == DisplayConverted) || (display_type_ == DisplayBoth))
 309                 paint_logic_mid(p, pp);
 310 }
 311
 312 void AnalogSignal::paint_fore(QPainter &p, ViewItemPaintParams &pp)
 313 {
 314         if (!enabled())
 315                 return;
 316
 317         if ((display_type_ == DisplayAnalog) || (display_type_ == DisplayBoth)) {
 318                 const int y = get_visual_y();
 319
 320                 // Show the info section on the right side of the trace
 321                 const QString infotext = QString("%1 V/div").arg(resolution_);
 322
 323                 p.setPen(base_->colour());
 324                 p.setFont(QApplication::font());
 325
 326                 const QRectF bounding_rect = QRectF(pp.left(),
 327                                 y + v_extents().first,
 328                                 pp.width() - InfoTextMarginRight,
 329                                 v_extents().second - v_extents().first - InfoTextMarginBottom);
 330
 331                 p.drawText(bounding_rect, Qt::AlignRight | Qt::AlignBottom, infotext);
 332         }
 333 }
 334
 335 void AnalogSignal::paint_grid(QPainter &p, int y, int left, int right)
 336 {
 337         p.setRenderHint(QPainter::Antialiasing, false);
 338
 339         GlobalSettings settings;
 340         const bool show_analog_minor_grid =
 341                 settings.value(GlobalSettings::Key_View_ShowAnalogMinorGrid).toBool();
 342
 343         if (pos_vdivs_ > 0) {
 344                 p.setPen(QPen(GridMajorColor, 1, Qt::DashLine));
 345                 for (int i = 1; i <= pos_vdivs_; i++) {
 346                         const float dy = i * div_height_;
 347                         p.drawLine(QLineF(left, y - dy, right, y - dy));
 348                 }
 349         }
 350
 351         if ((pos_vdivs_ > 0) && show_analog_minor_grid) {
 352                 p.setPen(QPen(GridMinorColor, 1, Qt::DashLine));
 353                 for (int i = 0; i < pos_vdivs_; i++) {
 354                         const float dy = i * div_height_;
 355                         const float dy25 = dy + (0.25 * div_height_);
 356                         const float dy50 = dy + (0.50 * div_height_);
 357                         const float dy75 = dy + (0.75 * div_height_);
 358                         p.drawLine(QLineF(left, y - dy25, right, y - dy25));
 359                         p.drawLine(QLineF(left, y - dy50, right, y - dy50));
 360                         p.drawLine(QLineF(left, y - dy75, right, y - dy75));
 361                 }
 362         }
 363
 364         if (neg_vdivs_ > 0) {
 365                 p.setPen(QPen(GridMajorColor, 1, Qt::DashLine));
 366                 for (int i = 1; i <= neg_vdivs_; i++) {
 367                         const float dy = i * div_height_;
 368                         p.drawLine(QLineF(left, y + dy, right, y + dy));
 369                 }
 370         }
 371
 372         if ((pos_vdivs_ > 0) && show_analog_minor_grid) {
 373                 p.setPen(QPen(GridMinorColor, 1, Qt::DashLine));
 374                 for (int i = 0; i < neg_vdivs_; i++) {
 375                         const float dy = i * div_height_;
 376                         const float dy25 = dy + (0.25 * div_height_);
 377                         const float dy50 = dy + (0.50 * div_height_);
 378                         const float dy75 = dy + (0.75 * div_height_);
 379                         p.drawLine(QLineF(left, y + dy25, right, y + dy25));
 380                         p.drawLine(QLineF(left, y + dy50, right, y + dy50));
 381                         p.drawLine(QLineF(left, y + dy75, right, y + dy75));
 382                 }
 383         }
 384
 385         p.setRenderHint(QPainter::Antialiasing, true);
 386 }
 387
 388 void AnalogSignal::paint_trace(QPainter &p,
 389         const shared_ptr<pv::data::AnalogSegment> &segment,
 390         int y, int left, const int64_t start, const int64_t end,
 391         const double pixels_offset, const double samples_per_pixel)
 392 {
 393         if (end <= start)
 394                 return;
 395
 396         bool paint_thr_dots =
 397                 (base_->get_conversion_type() != data::SignalBase::NoConversion) &&
 398                 (conversion_threshold_disp_mode_ == GlobalSettings::ConvThrDispMode_Dots);
 399
 400         vector<double> thresholds;
 401         if (paint_thr_dots)
 402                 thresholds = base_->get_conversion_thresholds();
 403
 404         // Calculate and paint the sampling points if enabled and useful
 405         GlobalSettings settings;
 406         const bool show_sampling_points =
 407                 (settings.value(GlobalSettings::Key_View_ShowSamplingPoints).toBool() ||
 408                 paint_thr_dots) && (samples_per_pixel < 0.25);
 409
 410         p.setPen(base_->colour());
 411
 412         const int64_t points_count = end - start;
 413
 414         QPointF *points = new QPointF[points_count];
 415         QPointF *point = points;
 416
 417         vector<QRectF> sampling_points[3];
 418
 419         int64_t sample_count = min(points_count, TracePaintBlockSize);
 420         int64_t block_sample = 0;
 421         float *sample_block = new float[TracePaintBlockSize];
 422         segment->get_samples(start, start + sample_count, sample_block);
 423
 424         const int w = 2;
 425         for (int64_t sample = start; sample != end; sample++, block_sample++) {
 426
 427                 if (block_sample == TracePaintBlockSize) {
 428                         block_sample = 0;
 429                         sample_count = min(points_count - sample, TracePaintBlockSize);
 430                         segment->get_samples(sample, sample + sample_count, sample_block);
 431                 }
 432
 433                 const float x = (sample / samples_per_pixel -
 434                         pixels_offset) + left;
 435
 436                 *point++ = QPointF(x, y - sample_block[block_sample] * scale_);
 437
 438                 if (show_sampling_points) {
 439                         int idx = 0;  // Neutral
 440
 441                         if (paint_thr_dots) {
 442                                 if (thresholds.size() == 1)
 443                                         idx = (sample_block[block_sample] >= thresholds[0]) ? 2 : 1;
 444                                 else if (thresholds.size() == 2) {
 445                                         if (sample_block[block_sample] > thresholds[1])
 446                                                 idx = 2;  // High
 447                                         else if (sample_block[block_sample] < thresholds[0])
 448                                                 idx = 1;  // Low
 449                                 }
 450                         }
 451
 452                         sampling_points[idx].push_back(
 453                                 QRectF(x - (w / 2), y - sample_block[block_sample] * scale_ - (w / 2), w, w));
 454                 }
 455         }
 456         delete[] sample_block;
 457
 458         p.drawPolyline(points, points_count);
 459
 460         if (show_sampling_points) {
 461                 if (paint_thr_dots) {
 462                         p.setPen(SamplingPointColourNe);
 463                         p.drawRects(sampling_points[0].data(), sampling_points[0].size());
 464                         p.setPen(SamplingPointColourLo);
 465                         p.drawRects(sampling_points[1].data(), sampling_points[1].size());
 466                         p.setPen(SamplingPointColourHi);
 467                         p.drawRects(sampling_points[2].data(), sampling_points[2].size());
 468                 } else {
 469                         p.setPen(SamplingPointColour);
 470                         p.drawRects(sampling_points[0].data(), sampling_points[0].size());
 471                 }
 472         }
 473
 474         delete[] points;
 475 }
 476
 477 void AnalogSignal::paint_envelope(QPainter &p,
 478         const shared_ptr<pv::data::AnalogSegment> &segment,
 479         int y, int left, const int64_t start, const int64_t end,
 480         const double pixels_offset, const double samples_per_pixel)
 481 {
 482         using pv::data::AnalogSegment;
 483
 484         AnalogSegment::EnvelopeSection e;
 485         segment->get_envelope_section(e, start, end, samples_per_pixel);
 486
 487         if (e.length < 2)
 488                 return;
 489
 490         p.setPen(QPen(Qt::NoPen));
 491         p.setBrush(base_->colour());
 492
 493         QRectF *const rects = new QRectF[e.length];
 494         QRectF *rect = rects;
 495
 496         for (uint64_t sample = 0; sample < e.length - 1; sample++) {
 497                 const float x = ((e.scale * sample + e.start) /
 498                         samples_per_pixel - pixels_offset) + left;
 499                 const AnalogSegment::EnvelopeSample *const s =
 500                         e.samples + sample;
 501
 502                 // We overlap this sample with the next so that vertical
 503                 // gaps do not appear during steep rising or falling edges
 504                 const float b = y - max(s->max, (s + 1)->min) * scale_;
 505                 const float t = y - min(s->min, (s + 1)->max) * scale_;
 506
 507                 float h = b - t;
 508                 if (h >= 0.0f && h <= 1.0f)
 509                         h = 1.0f;
 510                 if (h <= 0.0f && h >= -1.0f)
 511                         h = -1.0f;
 512
 513                 *rect++ = QRectF(x, t, 1.0f, h);
 514         }
 515
 516         p.drawRects(rects, e.length);
 517
 518         delete[] rects;
 519         delete[] e.samples;
 520 }
 521
 522 void AnalogSignal::paint_logic_mid(QPainter &p, ViewItemPaintParams &pp)
 523 {
 524         QLineF *line;
 525
 526         vector< pair<int64_t, bool> > edges;
 527
 528         assert(base_);
 529
 530         const int y = get_visual_y();
 531
 532         if (!base_->enabled() || !base_->logic_data())
 533                 return;
 534
 535         const int signal_margin =
 536                 QFontMetrics(QApplication::font()).height() / 2;
 537
 538         const int ph = min(pos_vdivs_, 1) * div_height_;
 539         const int nh = min(neg_vdivs_, 1) * div_height_;
 540         const float high_offset = y - ph + signal_margin + 0.5f;
 541         const float low_offset = y + nh - signal_margin - 0.5f;
 542
 543         shared_ptr<pv::data::LogicSegment> segment = get_logic_segment_to_paint();
 544         if (!segment)
 545                 return;
 546
 547         double samplerate = segment->samplerate();
 548
 549         // Show sample rate as 1Hz when it is unknown
 550         if (samplerate == 0.0)
 551                 samplerate = 1.0;
 552
 553         const double pixels_offset = pp.pixels_offset();
 554         const pv::util::Timestamp& start_time = segment->start_time();
 555         const int64_t last_sample = segment->get_sample_count() - 1;
 556         const double samples_per_pixel = samplerate * pp.scale();
 557         const double pixels_per_sample = 1 / samples_per_pixel;
 558         const pv::util::Timestamp start = samplerate * (pp.offset() - start_time);
 559         const pv::util::Timestamp end = start + samples_per_pixel * pp.width();
 560
 561         const int64_t start_sample = min(max(floor(start).convert_to<int64_t>(),
 562                 (int64_t)0), last_sample);
 563         const uint64_t end_sample = min(max(ceil(end).convert_to<int64_t>(),
 564                 (int64_t)0), last_sample);
 565
 566         segment->get_subsampled_edges(edges, start_sample, end_sample,
 567                 samples_per_pixel / LogicSignal::Oversampling, 0);
 568         assert(edges.size() >= 2);
 569
 570         // Check whether we need to paint the sampling points
 571         GlobalSettings settings;
 572         const bool show_sampling_points =
 573                 settings.value(GlobalSettings::Key_View_ShowSamplingPoints).toBool() &&
 574                 (samples_per_pixel < 0.25);
 575
 576         vector<QRectF> sampling_points;
 577         float sampling_point_x = 0.0f;
 578         int64_t sampling_point_sample = start_sample;
 579         const int w = 2;
 580
 581         if (show_sampling_points) {
 582                 sampling_points.reserve(end_sample - start_sample + 1);
 583                 sampling_point_x = (edges.cbegin()->first / samples_per_pixel - pixels_offset) + pp.left();
 584         }
 585
 586         // Paint the edges
 587         const unsigned int edge_count = edges.size() - 2;
 588         QLineF *const edge_lines = new QLineF[edge_count];
 589         line = edge_lines;
 590
 591         for (auto i = edges.cbegin() + 1; i != edges.cend() - 1; i++) {
 592                 const float x = ((*i).first / samples_per_pixel -
 593                         pixels_offset) + pp.left();
 594                 *line++ = QLineF(x, high_offset, x, low_offset);
 595
 596                 if (show_sampling_points)
 597                         while (sampling_point_sample < (*i).first) {
 598                                 const float y = (*i).second ? low_offset : high_offset;
 599                                 sampling_points.emplace_back(
 600                                         QRectF(sampling_point_x - (w / 2), y - (w / 2), w, w));
 601                                 sampling_point_sample++;
 602                                 sampling_point_x += pixels_per_sample;
 603                         };
 604         }
 605
 606         // Calculate the sample points from the last edge to the end of the trace
 607         if (show_sampling_points)
 608                 while ((uint64_t)sampling_point_sample <= end_sample) {
 609                         // Signal changed after the last edge, so the level is inverted
 610                         const float y = (edges.cend() - 1)->second ? high_offset : low_offset;
 611                         sampling_points.emplace_back(
 612                                 QRectF(sampling_point_x - (w / 2), y - (w / 2), w, w));
 613                         sampling_point_sample++;
 614                         sampling_point_x += pixels_per_sample;
 615                 };
 616
 617         p.setPen(LogicSignal::EdgeColour);
 618         p.drawLines(edge_lines, edge_count);
 619         delete[] edge_lines;
 620
 621         // Paint the caps
 622         const unsigned int max_cap_line_count = edges.size();
 623         QLineF *const cap_lines = new QLineF[max_cap_line_count];
 624
 625         p.setPen(LogicSignal::HighColour);
 626         paint_logic_caps(p, cap_lines, edges, true, samples_per_pixel,
 627                 pixels_offset, pp.left(), high_offset);
 628         p.setPen(LogicSignal::LowColour);
 629         paint_logic_caps(p, cap_lines, edges, false, samples_per_pixel,
 630                 pixels_offset, pp.left(), low_offset);
 631
 632         delete[] cap_lines;
 633
 634         // Paint the sampling points
 635         if (show_sampling_points) {
 636                 p.setPen(SamplingPointColour);
 637                 p.drawRects(sampling_points.data(), sampling_points.size());
 638         }
 639 }
 640
 641 void AnalogSignal::paint_logic_caps(QPainter &p, QLineF *const lines,
 642         vector< pair<int64_t, bool> > &edges, bool level,
 643         double samples_per_pixel, double pixels_offset, float x_offset,
 644         float y_offset)
 645 {
 646         QLineF *line = lines;
 647
 648         for (auto i = edges.begin(); i != (edges.end() - 1); i++)
 649                 if ((*i).second == level) {
 650                         *line++ = QLineF(
 651                                 ((*i).first / samples_per_pixel -
 652                                         pixels_offset) + x_offset, y_offset,
 653                                 ((*(i+1)).first / samples_per_pixel -
 654                                         pixels_offset) + x_offset, y_offset);
 655                 }
 656
 657         p.drawLines(lines, line - lines);
 658 }
 659
 660 shared_ptr<pv::data::AnalogSegment> AnalogSignal::get_analog_segment_to_paint() const
 661 {
 662         shared_ptr<pv::data::AnalogSegment> segment;
 663
 664         const deque< shared_ptr<pv::data::AnalogSegment> > &segments =
 665                 base_->analog_data()->analog_segments();
 666
 667         if (!segments.empty()) {
 668                 if (segment_display_mode_ == ShowLastSegmentOnly)
 669                         segment = segments.back();
 670
 671                 if ((segment_display_mode_ == ShowSingleSegmentOnly) ||
 672                                 (segment_display_mode_ == ShowLastCompleteSegmentOnly)) {
 673                         try {
 674                                 segment = segments.at(current_segment_);
 675                         } catch (out_of_range) {
 676                                 qDebug() << "Current analog segment out of range for signal" << base_->name() << ":" << current_segment_;
 677                         }
 678                 }
 679         }
 680
 681         return segment;
 682 }
 683
 684 shared_ptr<pv::data::LogicSegment> AnalogSignal::get_logic_segment_to_paint() const
 685 {
 686         shared_ptr<pv::data::LogicSegment> segment;
 687
 688         const deque< shared_ptr<pv::data::LogicSegment> > &segments =
 689                 base_->logic_data()->logic_segments();
 690
 691         if (!segments.empty()) {
 692                 if (segment_display_mode_ == ShowLastSegmentOnly)
 693                         segment = segments.back();
 694
 695                 if ((segment_display_mode_ == ShowSingleSegmentOnly) ||
 696                                 (segment_display_mode_ == ShowLastCompleteSegmentOnly)) {
 697                         try {
 698                                 segment = segments.at(current_segment_);
 699                         } catch (out_of_range) {
 700                                 qDebug() << "Current logic segment out of range for signal" << base_->name() << ":" << current_segment_;
 701                         }
 702                 }
 703         }
 704
 705         return segment;
 706 }
 707
 708 float AnalogSignal::get_resolution(int scale_index)
 709 {
 710         const float seq[] = {1.0f, 2.0f, 5.0f};
 711
 712         const int offset = numeric_limits<int>::max() / (2 * countof(seq));
 713         const div_t d = div((int)(scale_index + countof(seq) * offset),
 714                 countof(seq));
 715
 716         return powf(10.0f, d.quot - offset) * seq[d.rem];
 717 }
 718
 719 void AnalogSignal::update_scale()
 720 {
 721         resolution_ = get_resolution(scale_index_);
 722         scale_ = div_height_ / resolution_;
 723 }
 724
 725 void AnalogSignal::update_conversion_widgets()
 726 {
 727         SignalBase::ConversionType conv_type = base_->get_conversion_type();
 728
 729         // Enable or disable widgets depending on conversion state
 730         conv_threshold_cb_->setEnabled(conv_type != SignalBase::NoConversion);
 731         display_type_cb_->setEnabled(conv_type != SignalBase::NoConversion);
 732
 733         conv_threshold_cb_->clear();
 734
 735         vector < pair<QString, int> > presets = base_->get_conversion_presets();
 736
 737         // Prevent the combo box from firing the "edit text changed" signal
 738         // as that would involuntarily select the first entry
 739         conv_threshold_cb_->blockSignals(true);
 740
 741         // Set available options depending on chosen conversion
 742         for (pair<QString, int> preset : presets)
 743                 conv_threshold_cb_->addItem(preset.first, preset.second);
 744
 745         map < QString, QVariant > options = base_->get_conversion_options();
 746
 747         if (conv_type == SignalBase::A2LConversionByThreshold) {
 748                 const vector<double> thresholds = base_->get_conversion_thresholds(
 749                                 SignalBase::A2LConversionByThreshold, true);
 750                 conv_threshold_cb_->addItem(
 751                                 QString("%1V").arg(QString::number(thresholds[0], 'f', 1)), -1);
 752         }
 753
 754         if (conv_type == SignalBase::A2LConversionBySchmittTrigger) {
 755                 const vector<double> thresholds = base_->get_conversion_thresholds(
 756                                 SignalBase::A2LConversionBySchmittTrigger, true);
 757                 conv_threshold_cb_->addItem(QString("%1V/%2V").arg(
 758                                 QString::number(thresholds[0], 'f', 1),
 759                                 QString::number(thresholds[1], 'f', 1)), -1);
 760         }
 761
 762         int preset_id = base_->get_current_conversion_preset();
 763         conv_threshold_cb_->setCurrentIndex(
 764                         conv_threshold_cb_->findData(preset_id));
 765
 766         conv_threshold_cb_->blockSignals(false);
 767 }
 768
 769 void AnalogSignal::perform_autoranging(bool keep_divs, bool force_update)
 770 {
 771         const deque< shared_ptr<pv::data::AnalogSegment> > &segments =
 772                 base_->analog_data()->analog_segments();
 773
 774         if (segments.empty())
 775                 return;
 776
 777         static double prev_min = 0, prev_max = 0;
 778         double min = 0, max = 0;
 779
 780         for (shared_ptr<pv::data::AnalogSegment> segment : segments) {
 781                 pair<double, double> mm = segment->get_min_max();
 782                 min = std::min(min, mm.first);
 783                 max = std::max(max, mm.second);
 784         }
 785
 786         if ((min == prev_min) && (max == prev_max) && !force_update)
 787                 return;
 788
 789         prev_min = min;
 790         prev_max = max;
 791
 792         // If we're allowed to alter the div assignment...
 793         if (!keep_divs) {
 794                 // Use all divs for the positive range if there are no negative values
 795                 if ((min == 0) && (neg_vdivs_ > 0)) {
 796                         pos_vdivs_ += neg_vdivs_;
 797                         neg_vdivs_ = 0;
 798                 }
 799
 800                 // Split up the divs if there are negative values but no negative divs
 801                 if ((min < 0) && (neg_vdivs_ == 0)) {
 802                         neg_vdivs_ = pos_vdivs_ / 2;
 803                         pos_vdivs_ -= neg_vdivs_;
 804                 }
 805         }
 806
 807         // If there is still no positive div when we need it, add one
 808         // (this can happen when pos_vdivs==neg_vdivs==0)
 809         if ((max > 0) && (pos_vdivs_ == 0)) {
 810                 pos_vdivs_ = 1;
 811                 owner_->extents_changed(false, true);
 812         }
 813
 814         // If there is still no negative div when we need it, add one
 815         // (this can happen when pos_vdivs was 0 or 1 when trying to split)
 816         if ((min < 0) && (neg_vdivs_ == 0)) {
 817                 neg_vdivs_ = 1;
 818                 owner_->extents_changed(false, true);
 819         }
 820
 821         double min_value_per_div;
 822         if ((pos_vdivs_ > 0) && (neg_vdivs_ >  0))
 823                 min_value_per_div = std::max(max / pos_vdivs_, -min / neg_vdivs_);
 824         else if (pos_vdivs_ > 0)
 825                 min_value_per_div = max / pos_vdivs_;
 826         else
 827                 min_value_per_div = -min / neg_vdivs_;
 828
 829         // Find first scale value that is bigger than the value we need
 830         for (int i = MinScaleIndex; i < MaxScaleIndex; i++)
 831                 if (get_resolution(i) > min_value_per_div) {
 832                         scale_index_ = i;
 833                         break;
 834                 }
 835
 836         update_scale();
 837 }
 838
 839 void AnalogSignal::populate_popup_form(QWidget *parent, QFormLayout *form)
 840 {
 841         // Add the standard options
 842         Signal::populate_popup_form(parent, form);
 843
 844         QFormLayout *const layout = new QFormLayout;
 845
 846         // Add div-related settings
 847         pvdiv_sb_ = new QSpinBox(parent);
 848         pvdiv_sb_->setRange(0, MaximumVDivs);
 849         pvdiv_sb_->setValue(pos_vdivs_);
 850         connect(pvdiv_sb_, SIGNAL(valueChanged(int)),
 851                 this, SLOT(on_pos_vdivs_changed(int)));
 852         layout->addRow(tr("Number of pos vertical divs"), pvdiv_sb_);
 853
 854         nvdiv_sb_ = new QSpinBox(parent);
 855         nvdiv_sb_->setRange(0, MaximumVDivs);
 856         nvdiv_sb_->setValue(neg_vdivs_);
 857         connect(nvdiv_sb_, SIGNAL(valueChanged(int)),
 858                 this, SLOT(on_neg_vdivs_changed(int)));
 859         layout->addRow(tr("Number of neg vertical divs"), nvdiv_sb_);
 860
 861         div_height_sb_ = new QSpinBox(parent);
 862         div_height_sb_->setRange(20, 1000);
 863         div_height_sb_->setSingleStep(5);
 864         div_height_sb_->setSuffix(tr(" pixels"));
 865         div_height_sb_->setValue(div_height_);
 866         connect(div_height_sb_, SIGNAL(valueChanged(int)),
 867                 this, SLOT(on_div_height_changed(int)));
 868         layout->addRow(tr("Div height"), div_height_sb_);
 869
 870         // Add the vertical resolution
 871         resolution_cb_ = new QComboBox(parent);
 872
 873         for (int i = MinScaleIndex; i < MaxScaleIndex; i++) {
 874                 const QString label = QString("%1").arg(get_resolution(i));
 875                 resolution_cb_->insertItem(0, label, QVariant(i));
 876         }
 877
 878         int cur_idx = resolution_cb_->findData(QVariant(scale_index_));
 879         resolution_cb_->setCurrentIndex(cur_idx);
 880
 881         connect(resolution_cb_, SIGNAL(currentIndexChanged(int)),
 882                 this, SLOT(on_resolution_changed(int)));
 883
 884         QGridLayout *const vdiv_layout = new QGridLayout;
 885         QLabel *const vdiv_unit = new QLabel(tr("V/div"));
 886         vdiv_layout->addWidget(resolution_cb_, 0, 0);
 887         vdiv_layout->addWidget(vdiv_unit, 0, 1);
 888
 889         layout->addRow(tr("Vertical resolution"), vdiv_layout);
 890
 891         // Add the autoranging checkbox
 892         QCheckBox* autoranging_cb = new QCheckBox();
 893         autoranging_cb->setCheckState(autoranging_ ? Qt::Checked : Qt::Unchecked);
 894
 895         connect(autoranging_cb, SIGNAL(stateChanged(int)),
 896                 this, SLOT(on_autoranging_changed(int)));
 897
 898         layout->addRow(tr("Autoranging"), autoranging_cb);
 899
 900         // Add the conversion type dropdown
 901         conversion_cb_ = new QComboBox();
 902
 903         conversion_cb_->addItem(tr("none"),
 904                 SignalBase::NoConversion);
 905         conversion_cb_->addItem(tr("to logic via threshold"),
 906                 SignalBase::A2LConversionByThreshold);
 907         conversion_cb_->addItem(tr("to logic via schmitt-trigger"),
 908                 SignalBase::A2LConversionBySchmittTrigger);
 909
 910         cur_idx = conversion_cb_->findData(QVariant(base_->get_conversion_type()));
 911         conversion_cb_->setCurrentIndex(cur_idx);
 912
 913         layout->addRow(tr("Conversion"), conversion_cb_);
 914
 915         connect(conversion_cb_, SIGNAL(currentIndexChanged(int)),
 916                 this, SLOT(on_conversion_changed(int)));
 917
 918     // Add the conversion threshold settings
 919     conv_threshold_cb_ = new QComboBox();
 920     conv_threshold_cb_->setEditable(true);
 921
 922     layout->addRow(tr("Conversion threshold(s)"), conv_threshold_cb_);
 923
 924     connect(conv_threshold_cb_, SIGNAL(currentIndexChanged(int)),
 925             this, SLOT(on_conv_threshold_changed(int)));
 926     connect(conv_threshold_cb_, SIGNAL(editTextChanged(const QString)),
 927             this, SLOT(on_conv_threshold_changed()));  // index will be -1
 928
 929         // Add the display type dropdown
 930         display_type_cb_ = new QComboBox();
 931
 932         display_type_cb_->addItem(tr("analog"), DisplayAnalog);
 933         display_type_cb_->addItem(tr("converted"), DisplayConverted);
 934         display_type_cb_->addItem(tr("analog+converted"), DisplayBoth);
 935
 936         cur_idx = display_type_cb_->findData(QVariant(display_type_));
 937         display_type_cb_->setCurrentIndex(cur_idx);
 938
 939         layout->addRow(tr("Show traces for"), display_type_cb_);
 940
 941         connect(display_type_cb_, SIGNAL(currentIndexChanged(int)),
 942                 this, SLOT(on_display_type_changed(int)));
 943
 944         // Update the conversion widget contents and states
 945         update_conversion_widgets();
 946
 947         form->addRow(layout);
 948 }
 949
 950 void AnalogSignal::on_min_max_changed(float min, float max)
 951 {
 952         (void)min;
 953         (void)max;
 954
 955         if (autoranging_)
 956                 perform_autoranging(false, false);
 957 }
 958
 959 void AnalogSignal::on_pos_vdivs_changed(int vdivs)
 960 {
 961         if (vdivs == pos_vdivs_)
 962                 return;
 963
 964         pos_vdivs_ = vdivs;
 965
 966         // There has to be at least one div, positive or negative
 967         if ((neg_vdivs_ == 0) && (pos_vdivs_ == 0)) {
 968                 pos_vdivs_ = 1;
 969                 if (pvdiv_sb_)
 970                         pvdiv_sb_->setValue(pos_vdivs_);
 971         }
 972
 973         if (autoranging_) {
 974                 perform_autoranging(true, true);
 975
 976                 // It could be that a positive or negative div was added, so update
 977                 if (pvdiv_sb_) {
 978                         pvdiv_sb_->setValue(pos_vdivs_);
 979                         nvdiv_sb_->setValue(neg_vdivs_);
 980                 }
 981         }
 982
 983         if (owner_) {
 984                 // Call order is important, otherwise the lazy event handler won't work
 985                 owner_->extents_changed(false, true);
 986                 owner_->row_item_appearance_changed(false, true);
 987         }
 988 }
 989
 990 void AnalogSignal::on_neg_vdivs_changed(int vdivs)
 991 {
 992         if (vdivs == neg_vdivs_)
 993                 return;
 994
 995         neg_vdivs_ = vdivs;
 996
 997         // There has to be at least one div, positive or negative
 998         if ((neg_vdivs_ == 0) && (pos_vdivs_ == 0)) {
 999                 pos_vdivs_ = 1;
1000                 if (pvdiv_sb_)
1001                         pvdiv_sb_->setValue(pos_vdivs_);
1002         }
1003
1004         if (autoranging_) {
1005                 perform_autoranging(true, true);
1006
1007                 // It could be that a positive or negative div was added, so update
1008                 if (pvdiv_sb_) {
1009                         pvdiv_sb_->setValue(pos_vdivs_);
1010                         nvdiv_sb_->setValue(neg_vdivs_);
1011                 }
1012         }
1013
1014         if (owner_) {
1015                 // Call order is important, otherwise the lazy event handler won't work
1016                 owner_->extents_changed(false, true);
1017                 owner_->row_item_appearance_changed(false, true);
1018         }
1019 }
1020
1021 void AnalogSignal::on_div_height_changed(int height)
1022 {
1023         div_height_ = height;
1024         update_scale();
1025
1026         if (owner_) {
1027                 // Call order is important, otherwise the lazy event handler won't work
1028                 owner_->extents_changed(false, true);
1029                 owner_->row_item_appearance_changed(false, true);
1030         }
1031 }
1032
1033 void AnalogSignal::on_resolution_changed(int index)
1034 {
1035         scale_index_ = resolution_cb_->itemData(index).toInt();
1036         update_scale();
1037
1038         if (owner_)
1039                 owner_->row_item_appearance_changed(false, true);
1040 }
1041
1042 void AnalogSignal::on_autoranging_changed(int state)
1043 {
1044         autoranging_ = (state == Qt::Checked);
1045
1046         if (autoranging_)
1047                 perform_autoranging(false, true);
1048
1049         if (owner_) {
1050                 // Call order is important, otherwise the lazy event handler won't work
1051                 owner_->extents_changed(false, true);
1052                 owner_->row_item_appearance_changed(false, true);
1053         }
1054 }
1055
1056 void AnalogSignal::on_conversion_changed(int index)
1057 {
1058         SignalBase::ConversionType old_conv_type = base_->get_conversion_type();
1059
1060         SignalBase::ConversionType conv_type =
1061                 (SignalBase::ConversionType)(conversion_cb_->itemData(index).toInt());
1062
1063         if (conv_type != old_conv_type) {
1064                 base_->set_conversion_type(conv_type);
1065                 update_conversion_widgets();
1066
1067                 if (owner_)
1068                         owner_->row_item_appearance_changed(false, true);
1069         }
1070 }
1071
1072 void AnalogSignal::on_conv_threshold_changed(int index)
1073 {
1074         SignalBase::ConversionType conv_type = base_->get_conversion_type();
1075
1076         // Note: index is set to -1 if the text in the combo box matches none of
1077         // the entries in the combo box
1078
1079         if ((index == -1) && (conv_threshold_cb_->currentText().length() == 0))
1080                 return;
1081
1082         // The combo box entry with the custom value has user_data set to -1
1083         const int user_data = conv_threshold_cb_->findText(
1084                         conv_threshold_cb_->currentText());
1085
1086         const bool use_custom_thr = (index == -1) || (user_data == -1);
1087
1088         if (conv_type == SignalBase::A2LConversionByThreshold && use_custom_thr) {
1089                 // Not one of the preset values, try to parse the combo box text
1090                 // Note: Regex loosely based on
1091                 // https://txt2re.com/index-c++.php3?s=0.1V&1&-13
1092                 QString re1 = "([+-]?\\d*[\\.,]?\\d*)"; // Float value
1093                 QString re2 = "([a-zA-Z]*)"; // SI unit
1094                 QRegExp regex(re1 + re2);
1095
1096                 const QString text = conv_threshold_cb_->currentText();
1097                 if (!regex.exactMatch(text))
1098                         return;  // String doesn't match the regex
1099
1100                 QStringList tokens = regex.capturedTexts();
1101
1102                 // For now, we simply assume that the unit is volt without modifiers
1103                 const double thr = tokens.at(1).toDouble();
1104
1105                 // Only restart the conversion if the threshold was updated.
1106                 // We're starting a delayed conversion because the user may still be
1107                 // typing and the UI would lag if we kept on restarting it immediately
1108                 if (base_->set_conversion_option("threshold_value", thr))
1109                         base_->start_conversion(true);
1110         }
1111
1112         if (conv_type == SignalBase::A2LConversionBySchmittTrigger && use_custom_thr) {
1113                 // Not one of the preset values, try to parse the combo box text
1114                 // Note: Regex loosely based on
1115                 // https://txt2re.com/index-c++.php3?s=0.1V/0.2V&2&14&-22&3&15
1116                 QString re1 = "([+-]?\\d*[\\.,]?\\d*)"; // Float value
1117                 QString re2 = "([a-zA-Z]*)"; // SI unit
1118                 QString re3 = "\\/"; // Forward slash, not captured
1119                 QString re4 = "([+-]?\\d*[\\.,]?\\d*)"; // Float value
1120                 QString re5 = "([a-zA-Z]*)"; // SI unit
1121                 QRegExp regex(re1 + re2 + re3 + re4 + re5);
1122
1123                 const QString text = conv_threshold_cb_->currentText();
1124                 if (!regex.exactMatch(text))
1125                         return;  // String doesn't match the regex
1126
1127                 QStringList tokens = regex.capturedTexts();
1128
1129                 // For now, we simply assume that the unit is volt without modifiers
1130                 const double low_thr = tokens.at(1).toDouble();
1131                 const double high_thr = tokens.at(3).toDouble();
1132
1133                 // Only restart the conversion if one of the options was updated.
1134                 // We're starting a delayed conversion because the user may still be
1135                 // typing and the UI would lag if we kept on restarting it immediately
1136                 bool o1 = base_->set_conversion_option("threshold_value_low", low_thr);
1137                 bool o2 = base_->set_conversion_option("threshold_value_high", high_thr);
1138                 if (o1 || o2)
1139                         base_->start_conversion(true);  // Start delayed conversion
1140         }
1141
1142         base_->set_conversion_preset((SignalBase::ConversionPreset)index);
1143
1144         // Immediately start the conversion if we're not using custom values
1145         // (i.e. we're using one of the presets)
1146         if (!use_custom_thr)
1147                 base_->start_conversion();
1148 }
1149
1150 void AnalogSignal::on_delayed_conversion_starter()
1151 {
1152         base_->start_conversion();
1153 }
1154
1155 void AnalogSignal::on_display_type_changed(int index)
1156 {
1157         display_type_ = (DisplayType)(display_type_cb_->itemData(index).toInt());
1158
1159         if (owner_)
1160                 owner_->row_item_appearance_changed(false, true);
1161 }
1162
1163 void AnalogSignal::on_settingViewConversionThresholdDispMode_changed(const QVariant new_value)
1164 {
1165         conversion_threshold_disp_mode_ = new_value.toInt();
1166
1167         if (owner_)
1168                 owner_->row_item_appearance_changed(false, true);
1169 }
1170
1171 } // namespace trace
1172 } // namespace views
1173 } // namespace pv