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/util.hpp"
  42 #include "pv/data/analog.hpp"
  43 #include "pv/data/analogsegment.hpp"
  44 #include "pv/data/logic.hpp"
  45 #include "pv/data/logicsegment.hpp"
  46 #include "pv/data/signalbase.hpp"
  47 #include "pv/globalsettings.hpp"
  48
  49 #include <libsigrokcxx/libsigrokcxx.hpp>
  50
  51 using std::deque;
  52 using std::div;
  53 using std::div_t;
  54 // Note that "using std::isnan;" is _not_ put here since that would break
  55 // compilation on some platforms. Use "std::isnan()" instead in checks below.
  56 using std::max;
  57 using std::make_pair;
  58 using std::min;
  59 using std::numeric_limits;
  60 using std::out_of_range;
  61 using std::pair;
  62 using std::shared_ptr;
  63 using std::vector;
  64
  65 using pv::data::SignalBase;
  66 using pv::util::SIPrefix;
  67
  68 namespace pv {
  69 namespace views {
  70 namespace trace {
  71
  72 const QColor AnalogSignal::SignalColors[4] = {
  73         QColor(0xC4, 0xA0, 0x00),       // Yellow
  74         QColor(0x87, 0x20, 0x7A),       // Magenta
  75         QColor(0x20, 0x4A, 0x87),       // Blue
  76         QColor(0x4E, 0x9A, 0x06)        // Green
  77 };
  78
  79 const QPen AnalogSignal::AxisPen(QColor(0, 0, 0, 30 * 256 / 100), 2);
  80 const QColor AnalogSignal::GridMajorColor = QColor(0, 0, 0, 40 * 256 / 100);
  81 const QColor AnalogSignal::GridMinorColor = QColor(0, 0, 0, 20 * 256 / 100);
  82
  83 const QColor AnalogSignal::SamplingPointColor(0x77, 0x77, 0x77);
  84 const QColor AnalogSignal::SamplingPointColorLo = QColor(200, 0, 0, 80 * 256 / 100);
  85 const QColor AnalogSignal::SamplingPointColorNe = QColor(0,   0, 0, 80 * 256 / 100);
  86 const QColor AnalogSignal::SamplingPointColorHi = QColor(0, 200, 0, 80 * 256 / 100);
  87
  88 const QColor AnalogSignal::ThresholdColor = QColor(0, 0, 0, 30 * 256 / 100);
  89 const QColor AnalogSignal::ThresholdColorLo = QColor(255, 0, 0, 8 * 256 / 100);
  90 const QColor AnalogSignal::ThresholdColorNe = QColor(0,   0, 0, 10 * 256 / 100);
  91 const QColor AnalogSignal::ThresholdColorHi = QColor(0, 255, 0, 8 * 256 / 100);
  92
  93 const int64_t AnalogSignal::TracePaintBlockSize = 1024 * 1024;  // 4 MiB (due to float)
  94 const float AnalogSignal::EnvelopeThreshold = 64.0f;
  95
  96 const int AnalogSignal::MaximumVDivs = 10;
  97 const int AnalogSignal::MinScaleIndex = -6;
  98 const int AnalogSignal::MaxScaleIndex = 7;
  99
 100 const int AnalogSignal::InfoTextMarginRight = 20;
 101 const int AnalogSignal::InfoTextMarginBottom = 5;
 102
 103 AnalogSignal::AnalogSignal(
 104         pv::Session &session,
 105         shared_ptr<data::SignalBase> base) :
 106         Signal(session, base),
 107         scale_index_(4), // 20 per div
 108         scale_index_drag_offset_(0),
 109         pos_vdivs_(1),
 110         neg_vdivs_(1),
 111         resolution_(0),
 112         display_type_(DisplayBoth),
 113         autoranging_(true)
 114 {
 115         axis_pen_ = AxisPen;
 116
 117         pv::data::Analog* analog_data =
 118                 dynamic_cast<pv::data::Analog*>(data().get());
 119
 120         connect(analog_data, SIGNAL(min_max_changed(float, float)),
 121                 this, SLOT(on_min_max_changed(float, float)));
 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_color(SignalColors[base_->index() % countof(SignalColors)]);
 130         update_scale();
 131 }
 132
 133 shared_ptr<pv::data::SignalData> AnalogSignal::data() const
 134 {
 135         return base_->analog_data();
 136 }
 137
 138 void AnalogSignal::save_settings(QSettings &settings) const
 139 {
 140         settings.setValue("pos_vdivs", pos_vdivs_);
 141         settings.setValue("neg_vdivs", neg_vdivs_);
 142         settings.setValue("scale_index", scale_index_);
 143         settings.setValue("display_type", display_type_);
 144         settings.setValue("autoranging", autoranging_);
 145         settings.setValue("div_height", div_height_);
 146 }
 147
 148 void AnalogSignal::restore_settings(QSettings &settings)
 149 {
 150         if (settings.contains("pos_vdivs"))
 151                 pos_vdivs_ = settings.value("pos_vdivs").toInt();
 152
 153         if (settings.contains("neg_vdivs"))
 154                 neg_vdivs_ = settings.value("neg_vdivs").toInt();
 155
 156         if (settings.contains("scale_index")) {
 157                 scale_index_ = settings.value("scale_index").toInt();
 158                 update_scale();
 159         }
 160
 161         if (settings.contains("display_type"))
 162                 display_type_ = (DisplayType)(settings.value("display_type").toInt());
 163
 164         if (settings.contains("autoranging"))
 165                 autoranging_ = settings.value("autoranging").toBool();
 166
 167         if (settings.contains("div_height")) {
 168                 const int old_height = div_height_;
 169                 div_height_ = settings.value("div_height").toInt();
 170
 171                 if ((div_height_ != old_height) && owner_) {
 172                         // Call order is important, otherwise the lazy event handler won't work
 173                         owner_->extents_changed(false, true);
 174                         owner_->row_item_appearance_changed(false, true);
 175                 }
 176         }
 177 }
 178
 179 pair<int, int> AnalogSignal::v_extents() const
 180 {
 181         const int ph = pos_vdivs_ * div_height_;
 182         const int nh = neg_vdivs_ * div_height_;
 183         return make_pair(-ph, nh);
 184 }
 185
 186 int AnalogSignal::scale_handle_offset() const
 187 {
 188         const int h = (pos_vdivs_ + neg_vdivs_) * div_height_;
 189
 190         return ((scale_index_drag_offset_ - scale_index_) * h / 4) - h / 2;
 191 }
 192
 193 void AnalogSignal::scale_handle_dragged(int offset)
 194 {
 195         const int h = (pos_vdivs_ + neg_vdivs_) * div_height_;
 196
 197         scale_index_ = scale_index_drag_offset_ - (offset + h / 2) / (h / 4);
 198
 199         update_scale();
 200 }
 201
 202 void AnalogSignal::scale_handle_drag_release()
 203 {
 204         scale_index_drag_offset_ = scale_index_;
 205         update_scale();
 206 }
 207
 208 void AnalogSignal::on_setting_changed(const QString &key, const QVariant &value)
 209 {
 210         Signal::on_setting_changed(key, value);
 211
 212         if (key == GlobalSettings::Key_View_ConversionThresholdDispMode)
 213                 on_settingViewConversionThresholdDispMode_changed(value);
 214 }
 215
 216 void AnalogSignal::paint_back(QPainter &p, ViewItemPaintParams &pp)
 217 {
 218         if (!base_->enabled())
 219                 return;
 220
 221         bool paint_thr_bg =
 222                 conversion_threshold_disp_mode_ == GlobalSettings::ConvThrDispMode_Background;
 223
 224         const vector<double> thresholds = base_->get_conversion_thresholds();
 225
 226         // Only display thresholds if we have some and we show analog samples
 227         if ((thresholds.size() > 0) && paint_thr_bg &&
 228                 ((display_type_ == DisplayAnalog) || (display_type_ == DisplayBoth))) {
 229
 230                 const int visual_y = get_visual_y();
 231                 const pair<int, int> extents = v_extents();
 232                 const int top = visual_y + extents.first;
 233                 const int btm = visual_y + extents.second;
 234
 235                 // Draw high/neutral/low areas
 236                 if (thresholds.size() == 2) {
 237                         int thr_lo = visual_y - thresholds[0] * scale_;
 238                         int thr_hi = visual_y - thresholds[1] * scale_;
 239                         thr_lo = min(max(thr_lo, top), btm);
 240                         thr_hi = min(max(thr_hi, top), btm);
 241
 242                         p.fillRect(QRectF(pp.left(), top, pp.width(), thr_hi - top),
 243                                 QBrush(ThresholdColorHi));
 244                         p.fillRect(QRectF(pp.left(), thr_hi, pp.width(), thr_lo - thr_hi),
 245                                 QBrush(ThresholdColorNe));
 246                         p.fillRect(QRectF(pp.left(), thr_lo, pp.width(), btm - thr_lo),
 247                                 QBrush(ThresholdColorLo));
 248                 } else {
 249                         int thr = visual_y - thresholds[0] * scale_;
 250                         thr = min(max(thr, top), btm);
 251
 252                         p.fillRect(QRectF(pp.left(), top, pp.width(), thr - top),
 253                                 QBrush(ThresholdColorHi));
 254                         p.fillRect(QRectF(pp.left(), thr, pp.width(), btm - thr),
 255                                 QBrush(ThresholdColorLo));
 256                 }
 257
 258                 paint_axis(p, pp, get_visual_y());
 259         } else {
 260                 Trace::paint_back(p, pp);
 261                 paint_axis(p, pp, get_visual_y());
 262         }
 263 }
 264
 265 void AnalogSignal::paint_mid(QPainter &p, ViewItemPaintParams &pp)
 266 {
 267         assert(base_->analog_data());
 268         assert(owner_);
 269
 270         const int y = get_visual_y();
 271
 272         if (!base_->enabled())
 273                 return;
 274
 275         if ((display_type_ == DisplayAnalog) || (display_type_ == DisplayBoth)) {
 276                 paint_grid(p, y, pp.left(), pp.right());
 277
 278                 shared_ptr<pv::data::AnalogSegment> segment = get_analog_segment_to_paint();
 279                 if (!segment || (segment->get_sample_count() == 0))
 280                         return;
 281
 282                 const double pixels_offset = pp.pixels_offset();
 283                 const double samplerate = max(1.0, segment->samplerate());
 284                 const pv::util::Timestamp& start_time = segment->start_time();
 285                 const int64_t last_sample = (int64_t)segment->get_sample_count() - 1;
 286                 const double samples_per_pixel = samplerate * pp.scale();
 287                 const pv::util::Timestamp start = samplerate * (pp.offset() - start_time);
 288                 const pv::util::Timestamp end = start + samples_per_pixel * pp.width();
 289
 290                 const int64_t start_sample = min(max(floor(start).convert_to<int64_t>(),
 291                         (int64_t)0), last_sample);
 292                 const int64_t end_sample = min(max((ceil(end) + 1).convert_to<int64_t>(),
 293                         (int64_t)0), last_sample);
 294
 295                 if (samples_per_pixel < EnvelopeThreshold)
 296                         paint_trace(p, segment, y, pp.left(), start_sample, end_sample,
 297                                 pixels_offset, samples_per_pixel);
 298                 else
 299                         paint_envelope(p, segment, y, pp.left(), start_sample, end_sample,
 300                                 pixels_offset, samples_per_pixel);
 301         }
 302
 303         if ((display_type_ == DisplayConverted) || (display_type_ == DisplayBoth))
 304                 paint_logic_mid(p, pp);
 305 }
 306
 307 void AnalogSignal::paint_fore(QPainter &p, ViewItemPaintParams &pp)
 308 {
 309         if (!enabled())
 310                 return;
 311
 312         if ((display_type_ == DisplayAnalog) || (display_type_ == DisplayBoth)) {
 313                 const int y = get_visual_y();
 314
 315                 QString infotext;
 316
 317                 // Show the info section on the right side of the trace, including
 318                 // the value at the hover point when the hover marker is enabled
 319                 // and we have corresponding data available
 320                 if (show_hover_marker_ && !std::isnan(value_at_hover_pos_)) {
 321                         infotext = QString("[%1] %2 V/div")
 322                                 .arg(format_value_si(value_at_hover_pos_, SIPrefix::unspecified, 0, "V", false))
 323                                 .arg(resolution_);
 324                 } else
 325                         infotext = QString("%1 V/div").arg(resolution_);
 326
 327                 p.setPen(base_->color());
 328                 p.setFont(QApplication::font());
 329
 330                 const QRectF bounding_rect = QRectF(pp.left(),
 331                                 y + v_extents().first,
 332                                 pp.width() - InfoTextMarginRight,
 333                                 v_extents().second - v_extents().first - InfoTextMarginBottom);
 334
 335                 p.drawText(bounding_rect, Qt::AlignRight | Qt::AlignBottom, infotext);
 336         }
 337
 338         if (show_hover_marker_)
 339                 paint_hover_marker(p);
 340 }
 341
 342 void AnalogSignal::paint_grid(QPainter &p, int y, int left, int right)
 343 {
 344         p.setRenderHint(QPainter::Antialiasing, false);
 345
 346         GlobalSettings settings;
 347         const bool show_analog_minor_grid =
 348                 settings.value(GlobalSettings::Key_View_ShowAnalogMinorGrid).toBool();
 349
 350         if (pos_vdivs_ > 0) {
 351                 p.setPen(QPen(GridMajorColor, 1, Qt::DashLine));
 352                 for (int i = 1; i <= pos_vdivs_; i++) {
 353                         const float dy = i * div_height_;
 354                         p.drawLine(QLineF(left, y - dy, right, y - dy));
 355                 }
 356         }
 357
 358         if ((pos_vdivs_ > 0) && show_analog_minor_grid) {
 359                 p.setPen(QPen(GridMinorColor, 1, Qt::DashLine));
 360                 for (int i = 0; i < pos_vdivs_; i++) {
 361                         const float dy = i * div_height_;
 362                         const float dy25 = dy + (0.25 * div_height_);
 363                         const float dy50 = dy + (0.50 * div_height_);
 364                         const float dy75 = dy + (0.75 * div_height_);
 365                         p.drawLine(QLineF(left, y - dy25, right, y - dy25));
 366                         p.drawLine(QLineF(left, y - dy50, right, y - dy50));
 367                         p.drawLine(QLineF(left, y - dy75, right, y - dy75));
 368                 }
 369         }
 370
 371         if (neg_vdivs_ > 0) {
 372                 p.setPen(QPen(GridMajorColor, 1, Qt::DashLine));
 373                 for (int i = 1; i <= neg_vdivs_; i++) {
 374                         const float dy = i * div_height_;
 375                         p.drawLine(QLineF(left, y + dy, right, y + dy));
 376                 }
 377         }
 378
 379         if ((pos_vdivs_ > 0) && show_analog_minor_grid) {
 380                 p.setPen(QPen(GridMinorColor, 1, Qt::DashLine));
 381                 for (int i = 0; i < neg_vdivs_; i++) {
 382                         const float dy = i * div_height_;
 383                         const float dy25 = dy + (0.25 * div_height_);
 384                         const float dy50 = dy + (0.50 * div_height_);
 385                         const float dy75 = dy + (0.75 * div_height_);
 386                         p.drawLine(QLineF(left, y + dy25, right, y + dy25));
 387                         p.drawLine(QLineF(left, y + dy50, right, y + dy50));
 388                         p.drawLine(QLineF(left, y + dy75, right, y + dy75));
 389                 }
 390         }
 391
 392         p.setRenderHint(QPainter::Antialiasing, true);
 393 }
 394
 395 void AnalogSignal::paint_trace(QPainter &p,
 396         const shared_ptr<pv::data::AnalogSegment> &segment,
 397         int y, int left, const int64_t start, const int64_t end,
 398         const double pixels_offset, const double samples_per_pixel)
 399 {
 400         if (end <= start)
 401                 return;
 402
 403         bool paint_thr_dots =
 404                 (base_->get_conversion_type() != data::SignalBase::NoConversion) &&
 405                 (conversion_threshold_disp_mode_ == GlobalSettings::ConvThrDispMode_Dots);
 406
 407         vector<double> thresholds;
 408         if (paint_thr_dots)
 409                 thresholds = base_->get_conversion_thresholds();
 410
 411         // Calculate and paint the sampling points if enabled and useful
 412         GlobalSettings settings;
 413         const bool show_sampling_points =
 414                 (settings.value(GlobalSettings::Key_View_ShowSamplingPoints).toBool() ||
 415                 paint_thr_dots) && (samples_per_pixel < 0.25);
 416
 417         p.setPen(base_->color());
 418
 419         const int64_t points_count = end - start + 1;
 420
 421         QPointF *points = new QPointF[points_count];
 422         QPointF *point = points;
 423
 424         vector<QRectF> sampling_points[3];
 425
 426         int64_t sample_count = min(points_count, TracePaintBlockSize);
 427         int64_t block_sample = 0;
 428         float *sample_block = new float[TracePaintBlockSize];
 429         segment->get_samples(start, start + sample_count, sample_block);
 430
 431         if (show_hover_marker_)
 432                 reset_pixel_values();
 433
 434         const int w = 2;
 435         for (int64_t sample = start; sample <= end; sample++, block_sample++) {
 436
 437                 // Fetch next block of samples if we finished the current one
 438                 if (block_sample == TracePaintBlockSize) {
 439                         block_sample = 0;
 440                         sample_count = min(points_count - sample, TracePaintBlockSize);
 441                         segment->get_samples(sample, sample + sample_count, sample_block);
 442                 }
 443
 444                 const float abs_x = sample / samples_per_pixel - pixels_offset;
 445                 const float x = left + abs_x;
 446
 447                 *point++ = QPointF(x, y - sample_block[block_sample] * scale_);
 448
 449                 // Generate the pixel<->value lookup table for the mouse hover
 450                 if (show_hover_marker_)
 451                         process_next_sample_value(abs_x, sample_block[block_sample]);
 452
 453                 // Create the sampling points if needed
 454                 if (show_sampling_points) {
 455                         int idx = 0;  // Neutral
 456
 457                         if (paint_thr_dots) {
 458                                 if (thresholds.size() == 1)
 459                                         idx = (sample_block[block_sample] >= thresholds[0]) ? 2 : 1;
 460                                 else if (thresholds.size() == 2) {
 461                                         if (sample_block[block_sample] > thresholds[1])
 462                                                 idx = 2;  // High
 463                                         else if (sample_block[block_sample] < thresholds[0])
 464                                                 idx = 1;  // Low
 465                                 }
 466                         }
 467
 468                         sampling_points[idx].emplace_back(x - (w / 2), y - sample_block[block_sample] * scale_ - (w / 2), w, w);
 469                 }
 470         }
 471         delete[] sample_block;
 472
 473         p.drawPolyline(points, points_count);
 474
 475         if (show_sampling_points) {
 476                 if (paint_thr_dots) {
 477                         p.setPen(SamplingPointColorNe);
 478                         p.drawRects(sampling_points[0].data(), sampling_points[0].size());
 479                         p.setPen(SamplingPointColorLo);
 480                         p.drawRects(sampling_points[1].data(), sampling_points[1].size());
 481                         p.setPen(SamplingPointColorHi);
 482                         p.drawRects(sampling_points[2].data(), sampling_points[2].size());
 483                 } else {
 484                         p.setPen(SamplingPointColor);
 485                         p.drawRects(sampling_points[0].data(), sampling_points[0].size());
 486                 }
 487         }
 488
 489         delete[] points;
 490 }
 491
 492 void AnalogSignal::paint_envelope(QPainter &p,
 493         const shared_ptr<pv::data::AnalogSegment> &segment,
 494         int y, int left, const int64_t start, const int64_t end,
 495         const double pixels_offset, const double samples_per_pixel)
 496 {
 497         using pv::data::AnalogSegment;
 498
 499         // Note: Envelope painting currently doesn't generate a pixel<->value lookup table
 500         if (show_hover_marker_)
 501                 reset_pixel_values();
 502
 503         AnalogSegment::EnvelopeSection e;
 504         segment->get_envelope_section(e, start, end, samples_per_pixel);
 505
 506         if (e.length < 2)
 507                 return;
 508
 509         p.setPen(QPen(Qt::NoPen));
 510         p.setBrush(base_->color());
 511
 512         QRectF *const rects = new QRectF[e.length];
 513         QRectF *rect = rects;
 514
 515         for (uint64_t sample = 0; sample < e.length - 1; sample++) {
 516                 const float x = ((e.scale * sample + e.start) /
 517                         samples_per_pixel - pixels_offset) + left;
 518
 519                 const AnalogSegment::EnvelopeSample *const s = e.samples + sample;
 520
 521                 // We overlap this sample with the next so that vertical
 522                 // gaps do not appear during steep rising or falling edges
 523                 const float b = y - max(s->max, (s + 1)->min) * scale_;
 524                 const float t = y - min(s->min, (s + 1)->max) * scale_;
 525
 526                 float h = b - t;
 527                 if (h >= 0.0f && h <= 1.0f)
 528                         h = 1.0f;
 529                 if (h <= 0.0f && h >= -1.0f)
 530                         h = -1.0f;
 531
 532                 *rect++ = QRectF(x, t, 1.0f, h);
 533         }
 534
 535         p.drawRects(rects, e.length);
 536
 537         delete[] rects;
 538         delete[] e.samples;
 539 }
 540
 541 void AnalogSignal::paint_logic_mid(QPainter &p, ViewItemPaintParams &pp)
 542 {
 543         QLineF *line;
 544
 545         vector< pair<int64_t, bool> > edges;
 546
 547         assert(base_);
 548
 549         const int y = get_visual_y();
 550
 551         if (!base_->enabled() || !base_->logic_data())
 552                 return;
 553
 554         const int signal_margin =
 555                 QFontMetrics(QApplication::font()).height() / 2;
 556
 557         const int ph = min(pos_vdivs_, 1) * div_height_;
 558         const int nh = min(neg_vdivs_, 1) * div_height_;
 559         const float high_offset = y - ph + signal_margin + 0.5f;
 560         const float low_offset = y + nh - signal_margin - 0.5f;
 561
 562         shared_ptr<pv::data::LogicSegment> segment = get_logic_segment_to_paint();
 563         if (!segment || (segment->get_sample_count() == 0))
 564                 return;
 565
 566         double samplerate = segment->samplerate();
 567
 568         // Show sample rate as 1Hz when it is unknown
 569         if (samplerate == 0.0)
 570                 samplerate = 1.0;
 571
 572         const double pixels_offset = pp.pixels_offset();
 573         const pv::util::Timestamp& start_time = segment->start_time();
 574         const int64_t last_sample = (int64_t)segment->get_sample_count() - 1;
 575         const double samples_per_pixel = samplerate * pp.scale();
 576         const double pixels_per_sample = 1 / samples_per_pixel;
 577         const pv::util::Timestamp start = samplerate * (pp.offset() - start_time);
 578         const pv::util::Timestamp end = start + samples_per_pixel * pp.width();
 579
 580         const int64_t start_sample = min(max(floor(start).convert_to<int64_t>(),
 581                 (int64_t)0), last_sample);
 582         const uint64_t end_sample = min(max(ceil(end).convert_to<int64_t>(),
 583                 (int64_t)0), last_sample);
 584
 585         segment->get_subsampled_edges(edges, start_sample, end_sample,
 586                 samples_per_pixel / LogicSignal::Oversampling, 0);
 587         assert(edges.size() >= 2);
 588
 589         // Check whether we need to paint the sampling points
 590         GlobalSettings settings;
 591         const bool show_sampling_points =
 592                 settings.value(GlobalSettings::Key_View_ShowSamplingPoints).toBool() &&
 593                 (samples_per_pixel < 0.25);
 594
 595         vector<QRectF> sampling_points;
 596         float sampling_point_x = 0.0f;
 597         int64_t sampling_point_sample = start_sample;
 598         const int w = 2;
 599
 600         if (show_sampling_points) {
 601                 sampling_points.reserve(end_sample - start_sample + 1);
 602                 sampling_point_x = (edges.cbegin()->first / samples_per_pixel - pixels_offset) + pp.left();
 603         }
 604
 605         // Paint the edges
 606         const unsigned int edge_count = edges.size() - 2;
 607         QLineF *const edge_lines = new QLineF[edge_count];
 608         line = edge_lines;
 609
 610         for (auto i = edges.cbegin() + 1; i != edges.cend() - 1; i++) {
 611                 const float x = ((*i).first / samples_per_pixel -
 612                         pixels_offset) + pp.left();
 613                 *line++ = QLineF(x, high_offset, x, low_offset);
 614
 615                 if (show_sampling_points)
 616                         while (sampling_point_sample < (*i).first) {
 617                                 const float y = (*i).second ? low_offset : high_offset;
 618                                 sampling_points.emplace_back(
 619                                         QRectF(sampling_point_x - (w / 2), y - (w / 2), w, w));
 620                                 sampling_point_sample++;
 621                                 sampling_point_x += pixels_per_sample;
 622                         };
 623         }
 624
 625         // Calculate the sample points from the last edge to the end of the trace
 626         if (show_sampling_points)
 627                 while ((uint64_t)sampling_point_sample <= end_sample) {
 628                         // Signal changed after the last edge, so the level is inverted
 629                         const float y = (edges.cend() - 1)->second ? high_offset : low_offset;
 630                         sampling_points.emplace_back(
 631                                 QRectF(sampling_point_x - (w / 2), y - (w / 2), w, w));
 632                         sampling_point_sample++;
 633                         sampling_point_x += pixels_per_sample;
 634                 };
 635
 636         p.setPen(LogicSignal::EdgeColor);
 637         p.drawLines(edge_lines, edge_count);
 638         delete[] edge_lines;
 639
 640         // Paint the caps
 641         const unsigned int max_cap_line_count = edges.size();
 642         QLineF *const cap_lines = new QLineF[max_cap_line_count];
 643
 644         p.setPen(LogicSignal::HighColor);
 645         paint_logic_caps(p, cap_lines, edges, true, samples_per_pixel,
 646                 pixels_offset, pp.left(), high_offset);
 647         p.setPen(LogicSignal::LowColor);
 648         paint_logic_caps(p, cap_lines, edges, false, samples_per_pixel,
 649                 pixels_offset, pp.left(), low_offset);
 650
 651         delete[] cap_lines;
 652
 653         // Paint the sampling points
 654         if (show_sampling_points) {
 655                 p.setPen(SamplingPointColor);
 656                 p.drawRects(sampling_points.data(), sampling_points.size());
 657         }
 658 }
 659
 660 void AnalogSignal::paint_logic_caps(QPainter &p, QLineF *const lines,
 661         vector< pair<int64_t, bool> > &edges, bool level,
 662         double samples_per_pixel, double pixels_offset, float x_offset,
 663         float y_offset)
 664 {
 665         QLineF *line = lines;
 666
 667         for (auto i = edges.begin(); i != (edges.end() - 1); i++)
 668                 if ((*i).second == level) {
 669                         *line++ = QLineF(
 670                                 ((*i).first / samples_per_pixel -
 671                                         pixels_offset) + x_offset, y_offset,
 672                                 ((*(i+1)).first / samples_per_pixel -
 673                                         pixels_offset) + x_offset, y_offset);
 674                 }
 675
 676         p.drawLines(lines, line - lines);
 677 }
 678
 679 shared_ptr<pv::data::AnalogSegment> AnalogSignal::get_analog_segment_to_paint() const
 680 {
 681         shared_ptr<pv::data::AnalogSegment> segment;
 682
 683         const deque< shared_ptr<pv::data::AnalogSegment> > &segments =
 684                 base_->analog_data()->analog_segments();
 685
 686         if (!segments.empty()) {
 687                 if (segment_display_mode_ == ShowLastSegmentOnly)
 688                         segment = segments.back();
 689
 690                 if ((segment_display_mode_ == ShowSingleSegmentOnly) ||
 691                                 (segment_display_mode_ == ShowLastCompleteSegmentOnly)) {
 692                         try {
 693                                 segment = segments.at(current_segment_);
 694                         } catch (out_of_range&) {
 695                                 qDebug() << "Current analog segment out of range for signal" << base_->name() << ":" << current_segment_;
 696                         }
 697                 }
 698         }
 699
 700         return segment;
 701 }
 702
 703 shared_ptr<pv::data::LogicSegment> AnalogSignal::get_logic_segment_to_paint() const
 704 {
 705         shared_ptr<pv::data::LogicSegment> segment;
 706
 707         const deque< shared_ptr<pv::data::LogicSegment> > &segments =
 708                 base_->logic_data()->logic_segments();
 709
 710         if (!segments.empty()) {
 711                 if (segment_display_mode_ == ShowLastSegmentOnly)
 712                         segment = segments.back();
 713
 714                 if ((segment_display_mode_ == ShowSingleSegmentOnly) ||
 715                                 (segment_display_mode_ == ShowLastCompleteSegmentOnly)) {
 716                         try {
 717                                 segment = segments.at(current_segment_);
 718                         } catch (out_of_range&) {
 719                                 qDebug() << "Current logic segment out of range for signal" << base_->name() << ":" << current_segment_;
 720                         }
 721                 }
 722         }
 723
 724         return segment;
 725 }
 726
 727 float AnalogSignal::get_resolution(int scale_index)
 728 {
 729         const float seq[] = {1.0f, 2.0f, 5.0f};
 730
 731         const int offset = numeric_limits<int>::max() / (2 * countof(seq));
 732         const div_t d = div((int)(scale_index + countof(seq) * offset),
 733                 countof(seq));
 734
 735         return powf(10.0f, d.quot - offset) * seq[d.rem];
 736 }
 737
 738 void AnalogSignal::update_scale()
 739 {
 740         resolution_ = get_resolution(scale_index_);
 741         scale_ = div_height_ / resolution_;
 742 }
 743
 744 void AnalogSignal::update_conversion_widgets()
 745 {
 746         SignalBase::ConversionType conv_type = base_->get_conversion_type();
 747
 748         // Enable or disable widgets depending on conversion state
 749         conv_threshold_cb_->setEnabled(conv_type != SignalBase::NoConversion);
 750         display_type_cb_->setEnabled(conv_type != SignalBase::NoConversion);
 751
 752         conv_threshold_cb_->clear();
 753
 754         vector < pair<QString, int> > presets = base_->get_conversion_presets();
 755
 756         // Prevent the combo box from firing the "edit text changed" signal
 757         // as that would involuntarily select the first entry
 758         conv_threshold_cb_->blockSignals(true);
 759
 760         // Set available options depending on chosen conversion
 761         for (pair<QString, int> preset : presets)
 762                 conv_threshold_cb_->addItem(preset.first, preset.second);
 763
 764         map < QString, QVariant > options = base_->get_conversion_options();
 765
 766         if (conv_type == SignalBase::A2LConversionByThreshold) {
 767                 const vector<double> thresholds = base_->get_conversion_thresholds(
 768                                 SignalBase::A2LConversionByThreshold, true);
 769                 conv_threshold_cb_->addItem(
 770                                 QString("%1V").arg(QString::number(thresholds[0], 'f', 1)), -1);
 771         }
 772
 773         if (conv_type == SignalBase::A2LConversionBySchmittTrigger) {
 774                 const vector<double> thresholds = base_->get_conversion_thresholds(
 775                                 SignalBase::A2LConversionBySchmittTrigger, true);
 776                 conv_threshold_cb_->addItem(QString("%1V/%2V").arg(
 777                                 QString::number(thresholds[0], 'f', 1),
 778                                 QString::number(thresholds[1], 'f', 1)), -1);
 779         }
 780
 781         int preset_id = base_->get_current_conversion_preset();
 782         conv_threshold_cb_->setCurrentIndex(
 783                         conv_threshold_cb_->findData(preset_id));
 784
 785         conv_threshold_cb_->blockSignals(false);
 786 }
 787
 788 void AnalogSignal::perform_autoranging(bool keep_divs, bool force_update)
 789 {
 790         const deque< shared_ptr<pv::data::AnalogSegment> > &segments =
 791                 base_->analog_data()->analog_segments();
 792
 793         if (segments.empty())
 794                 return;
 795
 796         static double prev_min = 0, prev_max = 0;
 797         double min = 0, max = 0;
 798
 799         for (shared_ptr<pv::data::AnalogSegment> segment : segments) {
 800                 pair<double, double> mm = segment->get_min_max();
 801                 min = std::min(min, mm.first);
 802                 max = std::max(max, mm.second);
 803         }
 804
 805         if ((min == prev_min) && (max == prev_max) && !force_update)
 806                 return;
 807
 808         prev_min = min;
 809         prev_max = max;
 810
 811         // If we're allowed to alter the div assignment...
 812         if (!keep_divs) {
 813                 // Use all divs for the positive range if there are no negative values
 814                 if ((min == 0) && (neg_vdivs_ > 0)) {
 815                         pos_vdivs_ += neg_vdivs_;
 816                         neg_vdivs_ = 0;
 817                 }
 818
 819                 // Split up the divs if there are negative values but no negative divs
 820                 if ((min < 0) && (neg_vdivs_ == 0)) {
 821                         neg_vdivs_ = pos_vdivs_ / 2;
 822                         pos_vdivs_ -= neg_vdivs_;
 823                 }
 824         }
 825
 826         // If there is still no positive div when we need it, add one
 827         // (this can happen when pos_vdivs==neg_vdivs==0)
 828         if ((max > 0) && (pos_vdivs_ == 0)) {
 829                 pos_vdivs_ = 1;
 830                 owner_->extents_changed(false, true);
 831         }
 832
 833         // If there is still no negative div when we need it, add one
 834         // (this can happen when pos_vdivs was 0 or 1 when trying to split)
 835         if ((min < 0) && (neg_vdivs_ == 0)) {
 836                 neg_vdivs_ = 1;
 837                 owner_->extents_changed(false, true);
 838         }
 839
 840         double min_value_per_div;
 841         if ((pos_vdivs_ > 0) && (neg_vdivs_ >  0))
 842                 min_value_per_div = std::max(max / pos_vdivs_, -min / neg_vdivs_);
 843         else if (pos_vdivs_ > 0)
 844                 min_value_per_div = max / pos_vdivs_;
 845         else
 846                 min_value_per_div = -min / neg_vdivs_;
 847
 848         // Find first scale value that is bigger than the value we need
 849         for (int i = MinScaleIndex; i < MaxScaleIndex; i++)
 850                 if (get_resolution(i) > min_value_per_div) {
 851                         scale_index_ = i;
 852                         break;
 853                 }
 854
 855         update_scale();
 856 }
 857
 858 void AnalogSignal::reset_pixel_values()
 859 {
 860         value_at_pixel_pos_.clear();
 861         current_pixel_pos_ = -1;
 862         prev_value_at_pixel_ = std::numeric_limits<float>::quiet_NaN();
 863 }
 864
 865 void AnalogSignal::process_next_sample_value(float x, float value)
 866 {
 867         // Note: NAN is used to indicate the non-existance of a value at this pixel
 868
 869         if (std::isnan(prev_value_at_pixel_)) {
 870                 if (x < 0) {
 871                         min_value_at_pixel_ = value;
 872                         max_value_at_pixel_ = value;
 873                         prev_value_at_pixel_ = value;
 874                         current_pixel_pos_ = x;
 875                 } else
 876                         prev_value_at_pixel_ = std::numeric_limits<float>::quiet_NaN();
 877         }
 878
 879         const int pixel_pos = (int)(x + 0.5);
 880
 881         if (pixel_pos > current_pixel_pos_) {
 882                 if (pixel_pos - current_pixel_pos_ == 1) {
 883                         if (std::isnan(prev_value_at_pixel_)) {
 884                                 value_at_pixel_pos_.push_back(prev_value_at_pixel_);
 885                         } else {
 886                                 // Average the min/max range to create one value for the previous pixel
 887                                 const float avg = (min_value_at_pixel_ + max_value_at_pixel_) / 2;
 888                                 value_at_pixel_pos_.push_back(avg);
 889                         }
 890                 } else {
 891                         // Interpolate values to create values for the intermediate pixels
 892                         const float start_value = prev_value_at_pixel_;
 893                         const float end_value = value;
 894                         const int steps = fabs(pixel_pos - current_pixel_pos_);
 895                         const double gradient = (end_value - start_value) / steps;
 896                         for (int i = 0; i < steps; i++) {
 897                                 if (current_pixel_pos_ + i < 0)
 898                                         continue;
 899                                 value_at_pixel_pos_.push_back(start_value + i * gradient);
 900                         }
 901                 }
 902
 903                 min_value_at_pixel_ = value;
 904                 max_value_at_pixel_ = value;
 905                 prev_value_at_pixel_ = value;
 906                 current_pixel_pos_ = pixel_pos;
 907         } else {
 908                 // Another sample for the same pixel
 909                 if (value < min_value_at_pixel_)
 910                         min_value_at_pixel_ = value;
 911                 if (value > max_value_at_pixel_)
 912                         max_value_at_pixel_ = value;
 913         }
 914 }
 915
 916 void AnalogSignal::populate_popup_form(QWidget *parent, QFormLayout *form)
 917 {
 918         // Add the standard options
 919         Signal::populate_popup_form(parent, form);
 920
 921         QFormLayout *const layout = new QFormLayout;
 922
 923         // Add div-related settings
 924         pvdiv_sb_ = new QSpinBox(parent);
 925         pvdiv_sb_->setRange(0, MaximumVDivs);
 926         pvdiv_sb_->setValue(pos_vdivs_);
 927         connect(pvdiv_sb_, SIGNAL(valueChanged(int)),
 928                 this, SLOT(on_pos_vdivs_changed(int)));
 929         layout->addRow(tr("Number of pos vertical divs"), pvdiv_sb_);
 930
 931         nvdiv_sb_ = new QSpinBox(parent);
 932         nvdiv_sb_->setRange(0, MaximumVDivs);
 933         nvdiv_sb_->setValue(neg_vdivs_);
 934         connect(nvdiv_sb_, SIGNAL(valueChanged(int)),
 935                 this, SLOT(on_neg_vdivs_changed(int)));
 936         layout->addRow(tr("Number of neg vertical divs"), nvdiv_sb_);
 937
 938         div_height_sb_ = new QSpinBox(parent);
 939         div_height_sb_->setRange(20, 1000);
 940         div_height_sb_->setSingleStep(5);
 941         div_height_sb_->setSuffix(tr(" pixels"));
 942         div_height_sb_->setValue(div_height_);
 943         connect(div_height_sb_, SIGNAL(valueChanged(int)),
 944                 this, SLOT(on_div_height_changed(int)));
 945         layout->addRow(tr("Div height"), div_height_sb_);
 946
 947         // Add the vertical resolution
 948         resolution_cb_ = new QComboBox(parent);
 949
 950         for (int i = MinScaleIndex; i < MaxScaleIndex; i++) {
 951                 const QString label = QString("%1").arg(get_resolution(i));
 952                 resolution_cb_->insertItem(0, label, QVariant(i));
 953         }
 954
 955         int cur_idx = resolution_cb_->findData(QVariant(scale_index_));
 956         resolution_cb_->setCurrentIndex(cur_idx);
 957
 958         connect(resolution_cb_, SIGNAL(currentIndexChanged(int)),
 959                 this, SLOT(on_resolution_changed(int)));
 960
 961         QGridLayout *const vdiv_layout = new QGridLayout;
 962         QLabel *const vdiv_unit = new QLabel(tr("V/div"));
 963         vdiv_layout->addWidget(resolution_cb_, 0, 0);
 964         vdiv_layout->addWidget(vdiv_unit, 0, 1);
 965
 966         layout->addRow(tr("Vertical resolution"), vdiv_layout);
 967
 968         // Add the autoranging checkbox
 969         QCheckBox* autoranging_cb = new QCheckBox();
 970         autoranging_cb->setCheckState(autoranging_ ? Qt::Checked : Qt::Unchecked);
 971
 972         connect(autoranging_cb, SIGNAL(stateChanged(int)),
 973                 this, SLOT(on_autoranging_changed(int)));
 974
 975         layout->addRow(tr("Autoranging"), autoranging_cb);
 976
 977         // Add the conversion type dropdown
 978         conversion_cb_ = new QComboBox();
 979
 980         conversion_cb_->addItem(tr("none"),
 981                 SignalBase::NoConversion);
 982         conversion_cb_->addItem(tr("to logic via threshold"),
 983                 SignalBase::A2LConversionByThreshold);
 984         conversion_cb_->addItem(tr("to logic via schmitt-trigger"),
 985                 SignalBase::A2LConversionBySchmittTrigger);
 986
 987         cur_idx = conversion_cb_->findData(QVariant(base_->get_conversion_type()));
 988         conversion_cb_->setCurrentIndex(cur_idx);
 989
 990         layout->addRow(tr("Conversion"), conversion_cb_);
 991
 992         connect(conversion_cb_, SIGNAL(currentIndexChanged(int)),
 993                 this, SLOT(on_conversion_changed(int)));
 994
 995     // Add the conversion threshold settings
 996     conv_threshold_cb_ = new QComboBox();
 997     conv_threshold_cb_->setEditable(true);
 998
 999     layout->addRow(tr("Conversion threshold(s)"), conv_threshold_cb_);
1000
1001     connect(conv_threshold_cb_, SIGNAL(currentIndexChanged(int)),
1002             this, SLOT(on_conv_threshold_changed(int)));
1003     connect(conv_threshold_cb_, SIGNAL(editTextChanged(const QString&)),
1004             this, SLOT(on_conv_threshold_changed()));  // index will be -1
1005
1006         // Add the display type dropdown
1007         display_type_cb_ = new QComboBox();
1008
1009         display_type_cb_->addItem(tr("analog"), DisplayAnalog);
1010         display_type_cb_->addItem(tr("converted"), DisplayConverted);
1011         display_type_cb_->addItem(tr("analog+converted"), DisplayBoth);
1012
1013         cur_idx = display_type_cb_->findData(QVariant(display_type_));
1014         display_type_cb_->setCurrentIndex(cur_idx);
1015
1016         layout->addRow(tr("Show traces for"), display_type_cb_);
1017
1018         connect(display_type_cb_, SIGNAL(currentIndexChanged(int)),
1019                 this, SLOT(on_display_type_changed(int)));
1020
1021         // Update the conversion widget contents and states
1022         update_conversion_widgets();
1023
1024         form->addRow(layout);
1025 }
1026
1027 void AnalogSignal::hover_point_changed(const QPoint &hp)
1028 {
1029         Signal::hover_point_changed(hp);
1030
1031         // Note: Even though the view area begins at 0, we exclude 0 because
1032         // that's also the value given when the cursor is over the header to the
1033         // left of the trace paint area
1034         if (hp.x() <= 0) {
1035                 value_at_hover_pos_ = std::numeric_limits<float>::quiet_NaN();
1036         } else {
1037                 try {
1038                         value_at_hover_pos_ = value_at_pixel_pos_.at(hp.x());
1039                 } catch (out_of_range) {
1040                         value_at_hover_pos_ = std::numeric_limits<float>::quiet_NaN();
1041                 }
1042         }
1043 }
1044
1045 void AnalogSignal::on_min_max_changed(float min, float max)
1046 {
1047         (void)min;
1048         (void)max;
1049
1050         if (autoranging_)
1051                 perform_autoranging(false, false);
1052 }
1053
1054 void AnalogSignal::on_pos_vdivs_changed(int vdivs)
1055 {
1056         if (vdivs == pos_vdivs_)
1057                 return;
1058
1059         pos_vdivs_ = vdivs;
1060
1061         // There has to be at least one div, positive or negative
1062         if ((neg_vdivs_ == 0) && (pos_vdivs_ == 0)) {
1063                 pos_vdivs_ = 1;
1064                 if (pvdiv_sb_)
1065                         pvdiv_sb_->setValue(pos_vdivs_);
1066         }
1067
1068         if (autoranging_) {
1069                 perform_autoranging(true, true);
1070
1071                 // It could be that a positive or negative div was added, so update
1072                 if (pvdiv_sb_) {
1073                         pvdiv_sb_->setValue(pos_vdivs_);
1074                         nvdiv_sb_->setValue(neg_vdivs_);
1075                 }
1076         }
1077
1078         if (owner_) {
1079                 // Call order is important, otherwise the lazy event handler won't work
1080                 owner_->extents_changed(false, true);
1081                 owner_->row_item_appearance_changed(false, true);
1082         }
1083 }
1084
1085 void AnalogSignal::on_neg_vdivs_changed(int vdivs)
1086 {
1087         if (vdivs == neg_vdivs_)
1088                 return;
1089
1090         neg_vdivs_ = vdivs;
1091
1092         // There has to be at least one div, positive or negative
1093         if ((neg_vdivs_ == 0) && (pos_vdivs_ == 0)) {
1094                 pos_vdivs_ = 1;
1095                 if (pvdiv_sb_)
1096                         pvdiv_sb_->setValue(pos_vdivs_);
1097         }
1098
1099         if (autoranging_) {
1100                 perform_autoranging(true, true);
1101
1102                 // It could be that a positive or negative div was added, so update
1103                 if (pvdiv_sb_) {
1104                         pvdiv_sb_->setValue(pos_vdivs_);
1105                         nvdiv_sb_->setValue(neg_vdivs_);
1106                 }
1107         }
1108
1109         if (owner_) {
1110                 // Call order is important, otherwise the lazy event handler won't work
1111                 owner_->extents_changed(false, true);
1112                 owner_->row_item_appearance_changed(false, true);
1113         }
1114 }
1115
1116 void AnalogSignal::on_div_height_changed(int height)
1117 {
1118         div_height_ = height;
1119         update_scale();
1120
1121         if (owner_) {
1122                 // Call order is important, otherwise the lazy event handler won't work
1123                 owner_->extents_changed(false, true);
1124                 owner_->row_item_appearance_changed(false, true);
1125         }
1126 }
1127
1128 void AnalogSignal::on_resolution_changed(int index)
1129 {
1130         scale_index_ = resolution_cb_->itemData(index).toInt();
1131         update_scale();
1132
1133         if (owner_)
1134                 owner_->row_item_appearance_changed(false, true);
1135 }
1136
1137 void AnalogSignal::on_autoranging_changed(int state)
1138 {
1139         autoranging_ = (state == Qt::Checked);
1140
1141         if (autoranging_)
1142                 perform_autoranging(false, true);
1143
1144         if (owner_) {
1145                 // Call order is important, otherwise the lazy event handler won't work
1146                 owner_->extents_changed(false, true);
1147                 owner_->row_item_appearance_changed(false, true);
1148         }
1149 }
1150
1151 void AnalogSignal::on_conversion_changed(int index)
1152 {
1153         SignalBase::ConversionType old_conv_type = base_->get_conversion_type();
1154
1155         SignalBase::ConversionType conv_type =
1156                 (SignalBase::ConversionType)(conversion_cb_->itemData(index).toInt());
1157
1158         if (conv_type != old_conv_type) {
1159                 base_->set_conversion_type(conv_type);
1160                 update_conversion_widgets();
1161
1162                 if (owner_)
1163                         owner_->row_item_appearance_changed(false, true);
1164         }
1165 }
1166
1167 void AnalogSignal::on_conv_threshold_changed(int index)
1168 {
1169         SignalBase::ConversionType conv_type = base_->get_conversion_type();
1170
1171         // Note: index is set to -1 if the text in the combo box matches none of
1172         // the entries in the combo box
1173
1174         if ((index == -1) && (conv_threshold_cb_->currentText().length() == 0))
1175                 return;
1176
1177         // The combo box entry with the custom value has user_data set to -1
1178         const int user_data = conv_threshold_cb_->findText(
1179                         conv_threshold_cb_->currentText());
1180
1181         const bool use_custom_thr = (index == -1) || (user_data == -1);
1182
1183         if (conv_type == SignalBase::A2LConversionByThreshold && use_custom_thr) {
1184                 // Not one of the preset values, try to parse the combo box text
1185                 // Note: Regex loosely based on
1186                 // https://txt2re.com/index-c++.php3?s=0.1V&1&-13
1187                 QString re1 = "([+-]?\\d*[\\.,]?\\d*)"; // Float value
1188                 QString re2 = "([a-zA-Z]*)"; // SI unit
1189                 QRegExp regex(re1 + re2);
1190
1191                 const QString text = conv_threshold_cb_->currentText();
1192                 if (!regex.exactMatch(text))
1193                         return;  // String doesn't match the regex
1194
1195                 QStringList tokens = regex.capturedTexts();
1196
1197                 // For now, we simply assume that the unit is volt without modifiers
1198                 const double thr = tokens.at(1).toDouble();
1199
1200                 // Only restart the conversion if the threshold was updated.
1201                 // We're starting a delayed conversion because the user may still be
1202                 // typing and the UI would lag if we kept on restarting it immediately
1203                 if (base_->set_conversion_option("threshold_value", thr))
1204                         base_->start_conversion(true);
1205         }
1206
1207         if (conv_type == SignalBase::A2LConversionBySchmittTrigger && use_custom_thr) {
1208                 // Not one of the preset values, try to parse the combo box text
1209                 // Note: Regex loosely based on
1210                 // https://txt2re.com/index-c++.php3?s=0.1V/0.2V&2&14&-22&3&15
1211                 QString re1 = "([+-]?\\d*[\\.,]?\\d*)"; // Float value
1212                 QString re2 = "([a-zA-Z]*)"; // SI unit
1213                 QString re3 = "\\/"; // Forward slash, not captured
1214                 QString re4 = "([+-]?\\d*[\\.,]?\\d*)"; // Float value
1215                 QString re5 = "([a-zA-Z]*)"; // SI unit
1216                 QRegExp regex(re1 + re2 + re3 + re4 + re5);
1217
1218                 const QString text = conv_threshold_cb_->currentText();
1219                 if (!regex.exactMatch(text))
1220                         return;  // String doesn't match the regex
1221
1222                 QStringList tokens = regex.capturedTexts();
1223
1224                 // For now, we simply assume that the unit is volt without modifiers
1225                 const double low_thr = tokens.at(1).toDouble();
1226                 const double high_thr = tokens.at(3).toDouble();
1227
1228                 // Only restart the conversion if one of the options was updated.
1229                 // We're starting a delayed conversion because the user may still be
1230                 // typing and the UI would lag if we kept on restarting it immediately
1231                 bool o1 = base_->set_conversion_option("threshold_value_low", low_thr);
1232                 bool o2 = base_->set_conversion_option("threshold_value_high", high_thr);
1233                 if (o1 || o2)
1234                         base_->start_conversion(true);  // Start delayed conversion
1235         }
1236
1237         base_->set_conversion_preset((SignalBase::ConversionPreset)index);
1238
1239         // Immediately start the conversion if we're not using custom values
1240         // (i.e. we're using one of the presets)
1241         if (!use_custom_thr)
1242                 base_->start_conversion();
1243 }
1244
1245 void AnalogSignal::on_delayed_conversion_starter()
1246 {
1247         base_->start_conversion();
1248 }
1249
1250 void AnalogSignal::on_display_type_changed(int index)
1251 {
1252         display_type_ = (DisplayType)(display_type_cb_->itemData(index).toInt());
1253
1254         if (owner_)
1255                 owner_->row_item_appearance_changed(false, true);
1256 }
1257
1258 void AnalogSignal::on_settingViewConversionThresholdDispMode_changed(const QVariant new_value)
1259 {
1260         conversion_threshold_disp_mode_ = new_value.toInt();
1261
1262         if (owner_)
1263                 owner_->row_item_appearance_changed(false, true);
1264 }
1265
1266 } // namespace trace
1267 } // namespace views
1268 } // namespace pv