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::LogicSegment;
  66 using pv::data::SignalBase;
  67 using pv::util::SIPrefix;
  68
  69 namespace pv {
  70 namespace views {
  71 namespace trace {
  72
  73 const QColor AnalogSignal::SignalColors[4] = {
  74         QColor(0xC4, 0xA0, 0x00),       // Yellow
  75         QColor(0x87, 0x20, 0x7A),       // Magenta
  76         QColor(0x20, 0x4A, 0x87),       // Blue
  77         QColor(0x4E, 0x9A, 0x06)        // Green
  78 };
  79
  80 const QPen AnalogSignal::AxisPen(QColor(0, 0, 0, 30 * 256 / 100), 2);
  81 const QColor AnalogSignal::GridMajorColor = QColor(0, 0, 0, 40 * 256 / 100);
  82 const QColor AnalogSignal::GridMinorColor = QColor(0, 0, 0, 20 * 256 / 100);
  83
  84 const QColor AnalogSignal::SamplingPointColor(0x77, 0x77, 0x77);
  85 const QColor AnalogSignal::SamplingPointColorLo = QColor(200, 0, 0, 80 * 256 / 100);
  86 const QColor AnalogSignal::SamplingPointColorNe = QColor(0,   0, 0, 80 * 256 / 100);
  87 const QColor AnalogSignal::SamplingPointColorHi = QColor(0, 200, 0, 80 * 256 / 100);
  88
  89 const QColor AnalogSignal::ThresholdColor = QColor(0, 0, 0, 30 * 256 / 100);
  90 const QColor AnalogSignal::ThresholdColorLo = QColor(255, 0, 0, 8 * 256 / 100);
  91 const QColor AnalogSignal::ThresholdColorNe = QColor(0,   0, 0, 10 * 256 / 100);
  92 const QColor AnalogSignal::ThresholdColorHi = QColor(0, 255, 0, 8 * 256 / 100);
  93
  94 const int64_t AnalogSignal::TracePaintBlockSize = 1024 * 1024;  // 4 MiB (due to float)
  95 const float AnalogSignal::EnvelopeThreshold = 64.0f;
  96
  97 const int AnalogSignal::MaximumVDivs = 10;
  98 const int AnalogSignal::MinScaleIndex = -6;
  99 const int AnalogSignal::MaxScaleIndex = 7;
 100
 101 const int AnalogSignal::InfoTextMarginRight = 20;
 102 const int AnalogSignal::InfoTextMarginBottom = 5;
 103
 104 AnalogSignal::AnalogSignal(
 105         pv::Session &session,
 106         shared_ptr<data::SignalBase> base) :
 107         Signal(session, base),
 108         scale_index_(4), // 20 per div
 109         pos_vdivs_(1),
 110         neg_vdivs_(1),
 111         resolution_(0),
 112         display_type_(DisplayBoth),
 113         autoranging_(true),
 114         value_at_hover_pos_(std::numeric_limits<float>::quiet_NaN())
 115 {
 116         axis_pen_ = AxisPen;
 117
 118         pv::data::Analog* analog_data =
 119                 dynamic_cast<pv::data::Analog*>(data().get());
 120
 121         connect(analog_data, SIGNAL(min_max_changed(float, float)),
 122                 this, SLOT(on_min_max_changed(float, float)));
 123
 124         GlobalSettings settings;
 125         show_sampling_points_ =
 126                 settings.value(GlobalSettings::Key_View_ShowSamplingPoints).toBool();
 127         fill_high_areas_ =
 128                 settings.value(GlobalSettings::Key_View_FillSignalHighAreas).toBool();
 129         high_fill_color_ = QColor::fromRgba(settings.value(
 130                 GlobalSettings::Key_View_FillSignalHighAreaColor).value<uint32_t>());
 131         show_analog_minor_grid_ =
 132                 settings.value(GlobalSettings::Key_View_ShowAnalogMinorGrid).toBool();
 133         conversion_threshold_disp_mode_ =
 134                 settings.value(GlobalSettings::Key_View_ConversionThresholdDispMode).toInt();
 135         div_height_ = settings.value(GlobalSettings::Key_View_DefaultDivHeight).toInt();
 136
 137         base_->set_color(SignalColors[base_->index() % countof(SignalColors)]);
 138         update_scale();
 139 }
 140
 141 shared_ptr<pv::data::SignalData> AnalogSignal::data() const
 142 {
 143         return base_->analog_data();
 144 }
 145
 146 void AnalogSignal::save_settings(QSettings &settings) const
 147 {
 148         settings.setValue("pos_vdivs", pos_vdivs_);
 149         settings.setValue("neg_vdivs", neg_vdivs_);
 150         settings.setValue("scale_index", scale_index_);
 151         settings.setValue("display_type", display_type_);
 152         settings.setValue("autoranging", autoranging_);
 153         settings.setValue("div_height", div_height_);
 154 }
 155
 156 void AnalogSignal::restore_settings(QSettings &settings)
 157 {
 158         if (settings.contains("pos_vdivs"))
 159                 pos_vdivs_ = settings.value("pos_vdivs").toInt();
 160
 161         if (settings.contains("neg_vdivs"))
 162                 neg_vdivs_ = settings.value("neg_vdivs").toInt();
 163
 164         if (settings.contains("scale_index")) {
 165                 scale_index_ = settings.value("scale_index").toInt();
 166                 update_scale();
 167         }
 168
 169         if (settings.contains("display_type"))
 170                 display_type_ = (DisplayType)(settings.value("display_type").toInt());
 171
 172         if (settings.contains("autoranging"))
 173                 autoranging_ = settings.value("autoranging").toBool();
 174
 175         if (settings.contains("div_height")) {
 176                 const int old_height = div_height_;
 177                 div_height_ = settings.value("div_height").toInt();
 178
 179                 if ((div_height_ != old_height) && owner_) {
 180                         // Call order is important, otherwise the lazy event handler won't work
 181                         owner_->extents_changed(false, true);
 182                         owner_->row_item_appearance_changed(false, true);
 183                 }
 184         }
 185 }
 186
 187 pair<int, int> AnalogSignal::v_extents() const
 188 {
 189         const int ph = pos_vdivs_ * div_height_;
 190         const int nh = neg_vdivs_ * div_height_;
 191         return make_pair(-ph, nh);
 192 }
 193
 194 void AnalogSignal::paint_back(QPainter &p, ViewItemPaintParams &pp)
 195 {
 196         if (!base_->enabled())
 197                 return;
 198
 199         bool paint_thr_bg =
 200                 conversion_threshold_disp_mode_ == GlobalSettings::ConvThrDispMode_Background;
 201
 202         const vector<double> thresholds = base_->get_conversion_thresholds();
 203
 204         // Only display thresholds if we have some and we show analog samples
 205         if ((thresholds.size() > 0) && paint_thr_bg &&
 206                 ((display_type_ == DisplayAnalog) || (display_type_ == DisplayBoth))) {
 207
 208                 const int visual_y = get_visual_y();
 209                 const pair<int, int> extents = v_extents();
 210                 const int top = visual_y + extents.first;
 211                 const int btm = visual_y + extents.second;
 212
 213                 // Draw high/neutral/low areas
 214                 if (thresholds.size() == 2) {
 215                         int thr_lo = visual_y - thresholds[0] * scale_;
 216                         int thr_hi = visual_y - thresholds[1] * scale_;
 217                         thr_lo = min(max(thr_lo, top), btm);
 218                         thr_hi = min(max(thr_hi, top), btm);
 219
 220                         p.fillRect(QRectF(pp.left(), top, pp.width(), thr_hi - top),
 221                                 QBrush(ThresholdColorHi));
 222                         p.fillRect(QRectF(pp.left(), thr_hi, pp.width(), thr_lo - thr_hi),
 223                                 QBrush(ThresholdColorNe));
 224                         p.fillRect(QRectF(pp.left(), thr_lo, pp.width(), btm - thr_lo),
 225                                 QBrush(ThresholdColorLo));
 226                 } else {
 227                         int thr = visual_y - thresholds[0] * scale_;
 228                         thr = min(max(thr, top), btm);
 229
 230                         p.fillRect(QRectF(pp.left(), top, pp.width(), thr - top),
 231                                 QBrush(ThresholdColorHi));
 232                         p.fillRect(QRectF(pp.left(), thr, pp.width(), btm - thr),
 233                                 QBrush(ThresholdColorLo));
 234                 }
 235
 236                 paint_axis(p, pp, get_visual_y());
 237         } else {
 238                 Signal::paint_back(p, pp);
 239                 paint_axis(p, pp, get_visual_y());
 240         }
 241 }
 242
 243 void AnalogSignal::paint_mid(QPainter &p, ViewItemPaintParams &pp)
 244 {
 245         assert(base_->analog_data());
 246         assert(owner_);
 247
 248         const int y = get_visual_y();
 249
 250         if (!base_->enabled())
 251                 return;
 252
 253         if ((display_type_ == DisplayAnalog) || (display_type_ == DisplayBoth)) {
 254                 paint_grid(p, y, pp.left(), pp.right());
 255
 256                 shared_ptr<pv::data::AnalogSegment> segment = get_analog_segment_to_paint();
 257                 if (!segment || (segment->get_sample_count() == 0))
 258                         return;
 259
 260                 const double pixels_offset = pp.pixels_offset();
 261                 const double samplerate = max(1.0, segment->samplerate());
 262                 const pv::util::Timestamp& start_time = segment->start_time();
 263                 const int64_t last_sample = (int64_t)segment->get_sample_count() - 1;
 264                 const double samples_per_pixel = samplerate * pp.scale();
 265                 const pv::util::Timestamp start = samplerate * (pp.offset() - start_time);
 266                 const pv::util::Timestamp end = start + samples_per_pixel * pp.width();
 267
 268                 const int64_t start_sample = min(max(floor(start).convert_to<int64_t>(),
 269                         (int64_t)0), last_sample);
 270                 const int64_t end_sample = min(max((ceil(end) + 1).convert_to<int64_t>(),
 271                         (int64_t)0), last_sample);
 272
 273                 if (samples_per_pixel < EnvelopeThreshold)
 274                         paint_trace(p, segment, y, pp.left(), start_sample, end_sample,
 275                                 pixels_offset, samples_per_pixel);
 276                 else
 277                         paint_envelope(p, segment, y, pp.left(), start_sample, end_sample,
 278                                 pixels_offset, samples_per_pixel);
 279         }
 280
 281         if ((display_type_ == DisplayConverted) || (display_type_ == DisplayBoth))
 282                 paint_logic_mid(p, pp);
 283 }
 284
 285 void AnalogSignal::paint_fore(QPainter &p, ViewItemPaintParams &pp)
 286 {
 287         if (!enabled())
 288                 return;
 289
 290         if ((display_type_ == DisplayAnalog) || (display_type_ == DisplayBoth)) {
 291                 const int y = get_visual_y();
 292
 293                 QString infotext;
 294
 295                 // Show the info section on the right side of the trace, including
 296                 // the value at the hover point when the hover marker is enabled
 297                 // and we have corresponding data available
 298                 if (show_hover_marker_ && !std::isnan(value_at_hover_pos_)) {
 299                         infotext = QString("[%1] %2 V/div")
 300                                 .arg(format_value_si(value_at_hover_pos_, SIPrefix::unspecified, 2, "V", false))
 301                                 .arg(resolution_);
 302                 } else
 303                         infotext = QString("%1 V/div").arg(resolution_);
 304
 305                 p.setPen(base_->color());
 306                 p.setFont(QApplication::font());
 307
 308                 const QRectF bounding_rect = QRectF(pp.left(),
 309                                 y + v_extents().first,
 310                                 pp.width() - InfoTextMarginRight,
 311                                 v_extents().second - v_extents().first - InfoTextMarginBottom);
 312
 313                 p.drawText(bounding_rect, Qt::AlignRight | Qt::AlignBottom, infotext);
 314         }
 315
 316         if (show_hover_marker_)
 317                 paint_hover_marker(p);
 318 }
 319
 320 void AnalogSignal::paint_grid(QPainter &p, int y, int left, int right)
 321 {
 322         p.setRenderHint(QPainter::Antialiasing, false);
 323
 324         if (pos_vdivs_ > 0) {
 325                 p.setPen(QPen(GridMajorColor, 1, Qt::DashLine));
 326                 for (int i = 1; i <= pos_vdivs_; i++) {
 327                         const float dy = i * div_height_;
 328                         p.drawLine(QLineF(left, y - dy, right, y - dy));
 329                 }
 330         }
 331
 332         if ((pos_vdivs_ > 0) && show_analog_minor_grid_) {
 333                 p.setPen(QPen(GridMinorColor, 1, Qt::DashLine));
 334                 for (int i = 0; i < pos_vdivs_; i++) {
 335                         const float dy = i * div_height_;
 336                         const float dy25 = dy + (0.25 * div_height_);
 337                         const float dy50 = dy + (0.50 * div_height_);
 338                         const float dy75 = dy + (0.75 * div_height_);
 339                         p.drawLine(QLineF(left, y - dy25, right, y - dy25));
 340                         p.drawLine(QLineF(left, y - dy50, right, y - dy50));
 341                         p.drawLine(QLineF(left, y - dy75, right, y - dy75));
 342                 }
 343         }
 344
 345         if (neg_vdivs_ > 0) {
 346                 p.setPen(QPen(GridMajorColor, 1, Qt::DashLine));
 347                 for (int i = 1; i <= neg_vdivs_; i++) {
 348                         const float dy = i * div_height_;
 349                         p.drawLine(QLineF(left, y + dy, right, y + dy));
 350                 }
 351         }
 352
 353         if ((pos_vdivs_ > 0) && show_analog_minor_grid_) {
 354                 p.setPen(QPen(GridMinorColor, 1, Qt::DashLine));
 355                 for (int i = 0; i < neg_vdivs_; i++) {
 356                         const float dy = i * div_height_;
 357                         const float dy25 = dy + (0.25 * div_height_);
 358                         const float dy50 = dy + (0.50 * div_height_);
 359                         const float dy75 = dy + (0.75 * div_height_);
 360                         p.drawLine(QLineF(left, y + dy25, right, y + dy25));
 361                         p.drawLine(QLineF(left, y + dy50, right, y + dy50));
 362                         p.drawLine(QLineF(left, y + dy75, right, y + dy75));
 363                 }
 364         }
 365
 366         p.setRenderHint(QPainter::Antialiasing, true);
 367 }
 368
 369 void AnalogSignal::paint_trace(QPainter &p,
 370         const shared_ptr<pv::data::AnalogSegment> &segment,
 371         int y, int left, const int64_t start, const int64_t end,
 372         const double pixels_offset, const double samples_per_pixel)
 373 {
 374         if (end <= start)
 375                 return;
 376
 377         bool paint_thr_dots =
 378                 (base_->get_conversion_type() != data::SignalBase::NoConversion) &&
 379                 (conversion_threshold_disp_mode_ == GlobalSettings::ConvThrDispMode_Dots);
 380
 381         vector<double> thresholds;
 382         if (paint_thr_dots)
 383                 thresholds = base_->get_conversion_thresholds();
 384
 385         // Calculate and paint the sampling points if enabled and useful
 386         GlobalSettings settings;
 387         const bool show_sampling_points =
 388                 (show_sampling_points_ || paint_thr_dots) && (samples_per_pixel < 0.25);
 389
 390         p.setPen(base_->color());
 391
 392         const int64_t points_count = end - start + 1;
 393
 394         QPointF *points = new QPointF[points_count];
 395         QPointF *point = points;
 396
 397         vector<QRectF> sampling_points[3];
 398
 399         int64_t sample_count = min(points_count, TracePaintBlockSize);
 400         int64_t block_sample = 0;
 401         float *sample_block = new float[TracePaintBlockSize];
 402         segment->get_samples(start, start + sample_count, sample_block);
 403
 404         if (show_hover_marker_)
 405                 reset_pixel_values();
 406
 407         const int w = 2;
 408         for (int64_t sample = start; sample <= end; sample++, block_sample++) {
 409
 410                 // Fetch next block of samples if we finished the current one
 411                 if (block_sample == TracePaintBlockSize) {
 412                         block_sample = 0;
 413                         sample_count = min(points_count - sample, TracePaintBlockSize);
 414                         segment->get_samples(sample, sample + sample_count, sample_block);
 415                 }
 416
 417                 const float abs_x = sample / samples_per_pixel - pixels_offset;
 418                 const float x = left + abs_x;
 419
 420                 *point++ = QPointF(x, y - sample_block[block_sample] * scale_);
 421
 422                 // Generate the pixel<->value lookup table for the mouse hover
 423                 if (show_hover_marker_)
 424                         process_next_sample_value(abs_x, sample_block[block_sample]);
 425
 426                 // Create the sampling points if needed
 427                 if (show_sampling_points) {
 428                         int idx = 0;  // Neutral
 429
 430                         if (paint_thr_dots) {
 431                                 if (thresholds.size() == 1)
 432                                         idx = (sample_block[block_sample] >= thresholds[0]) ? 2 : 1;
 433                                 else if (thresholds.size() == 2) {
 434                                         if (sample_block[block_sample] > thresholds[1])
 435                                                 idx = 2;  // High
 436                                         else if (sample_block[block_sample] < thresholds[0])
 437                                                 idx = 1;  // Low
 438                                 }
 439                         }
 440
 441                         sampling_points[idx].emplace_back(x - (w / 2), y - sample_block[block_sample] * scale_ - (w / 2), w, w);
 442                 }
 443         }
 444         delete[] sample_block;
 445
 446         p.drawPolyline(points, points_count);
 447
 448         if (show_sampling_points) {
 449                 if (paint_thr_dots) {
 450                         p.setPen(SamplingPointColorNe);
 451                         p.drawRects(sampling_points[0].data(), sampling_points[0].size());
 452                         p.setPen(SamplingPointColorLo);
 453                         p.drawRects(sampling_points[1].data(), sampling_points[1].size());
 454                         p.setPen(SamplingPointColorHi);
 455                         p.drawRects(sampling_points[2].data(), sampling_points[2].size());
 456                 } else {
 457                         p.setPen(SamplingPointColor);
 458                         p.drawRects(sampling_points[0].data(), sampling_points[0].size());
 459                 }
 460         }
 461
 462         delete[] points;
 463 }
 464
 465 void AnalogSignal::paint_envelope(QPainter &p,
 466         const shared_ptr<pv::data::AnalogSegment> &segment,
 467         int y, int left, const int64_t start, const int64_t end,
 468         const double pixels_offset, const double samples_per_pixel)
 469 {
 470         using pv::data::AnalogSegment;
 471
 472         // Note: Envelope painting currently doesn't generate a pixel<->value lookup table
 473         if (show_hover_marker_)
 474                 reset_pixel_values();
 475
 476         AnalogSegment::EnvelopeSection e;
 477         segment->get_envelope_section(e, start, end, samples_per_pixel);
 478
 479         if (e.length < 2)
 480                 return;
 481
 482         p.setPen(QPen(Qt::NoPen));
 483         p.setBrush(base_->color());
 484
 485         QRectF *const rects = new QRectF[e.length];
 486         QRectF *rect = rects;
 487
 488         for (uint64_t sample = 0; sample < e.length - 1; sample++) {
 489                 const float x = ((e.scale * sample + e.start) /
 490                         samples_per_pixel - pixels_offset) + left;
 491
 492                 const AnalogSegment::EnvelopeSample *const s = e.samples + sample;
 493
 494                 // We overlap this sample with the next so that vertical
 495                 // gaps do not appear during steep rising or falling edges
 496                 const float b = y - max(s->max, (s + 1)->min) * scale_;
 497                 const float t = y - min(s->min, (s + 1)->max) * scale_;
 498
 499                 float h = b - t;
 500                 if (h >= 0.0f && h <= 1.0f)
 501                         h = 1.0f;
 502                 if (h <= 0.0f && h >= -1.0f)
 503                         h = -1.0f;
 504
 505                 *rect++ = QRectF(x, t, 1.0f, h);
 506         }
 507
 508         p.drawRects(rects, e.length);
 509
 510         delete[] rects;
 511         delete[] e.samples;
 512 }
 513
 514 void AnalogSignal::paint_logic_mid(QPainter &p, ViewItemPaintParams &pp)
 515 {
 516         QLineF *line;
 517
 518         vector< pair<int64_t, bool> > edges;
 519
 520         assert(base_);
 521
 522         const int y = get_visual_y();
 523
 524         if (!base_->enabled() || !base_->logic_data())
 525                 return;
 526
 527         const int signal_margin =
 528                 QFontMetrics(QApplication::font()).height() / 2;
 529
 530         const int ph = min(pos_vdivs_, 1) * div_height_;
 531         const int nh = min(neg_vdivs_, 1) * div_height_;
 532         const float high_offset = y - ph + signal_margin + 0.5f;
 533         const float low_offset = y + nh - signal_margin - 0.5f;
 534         const float signal_height = low_offset - high_offset;
 535
 536         shared_ptr<pv::data::LogicSegment> segment = get_logic_segment_to_paint();
 537         if (!segment || (segment->get_sample_count() == 0))
 538                 return;
 539
 540         double samplerate = segment->samplerate();
 541
 542         // Show sample rate as 1Hz when it is unknown
 543         if (samplerate == 0.0)
 544                 samplerate = 1.0;
 545
 546         const double pixels_offset = pp.pixels_offset();
 547         const pv::util::Timestamp& start_time = segment->start_time();
 548         const int64_t last_sample = (int64_t)segment->get_sample_count() - 1;
 549         const double samples_per_pixel = samplerate * pp.scale();
 550         const double pixels_per_sample = 1 / samples_per_pixel;
 551         const pv::util::Timestamp start = samplerate * (pp.offset() - start_time);
 552         const pv::util::Timestamp end = start + samples_per_pixel * pp.width();
 553
 554         const int64_t start_sample = min(max(floor(start).convert_to<int64_t>(),
 555                 (int64_t)0), last_sample);
 556         const uint64_t end_sample = min(max(ceil(end).convert_to<int64_t>(),
 557                 (int64_t)0), last_sample);
 558
 559         segment->get_subsampled_edges(edges, start_sample, end_sample,
 560                 samples_per_pixel / LogicSignal::Oversampling, 0);
 561         assert(edges.size() >= 2);
 562
 563         const float first_sample_x =
 564                 pp.left() + (edges.front().first / samples_per_pixel - pixels_offset);
 565         const float last_sample_x =
 566                 pp.left() + (edges.back().first / samples_per_pixel - pixels_offset);
 567
 568         // Check whether we need to paint the sampling points
 569         const bool show_sampling_points = show_sampling_points_ && (samples_per_pixel < 0.25);
 570         vector<QRectF> sampling_points;
 571         float sampling_point_x = first_sample_x;
 572         int64_t sampling_point_sample = start_sample;
 573         const int w = 2;
 574
 575         if (show_sampling_points)
 576                 sampling_points.reserve(end_sample - start_sample + 1);
 577
 578         vector<QRectF> high_rects;
 579         float rising_edge_x;
 580         bool rising_edge_seen = false;
 581
 582         // Paint the edges
 583         const unsigned int edge_count = edges.size() - 2;
 584         QLineF *const edge_lines = new QLineF[edge_count];
 585         line = edge_lines;
 586
 587         if (edges.front().second) {
 588                 // Beginning of trace is high
 589                 rising_edge_x = first_sample_x;
 590                 rising_edge_seen = true;
 591         }
 592
 593         for (auto i = edges.cbegin() + 1; i != edges.cend() - 1; i++) {
 594                 // Note: multiple edges occupying a single pixel are represented by an edge
 595                 // with undefined logic level. This means that only the first falling edge
 596                 // after a rising edge corresponds to said rising edge - and vice versa. If
 597                 // more edges with the same logic level follow, they denote multiple edges.
 598
 599                 const float x = pp.left() + ((*i).first / samples_per_pixel - pixels_offset);
 600                 *line++ = QLineF(x, high_offset, x, low_offset);
 601
 602                 if (fill_high_areas_) {
 603                         // Any edge terminates a high area
 604                         if (rising_edge_seen) {
 605                                 const int width = x - rising_edge_x;
 606                                 if (width > 0)
 607                                         high_rects.emplace_back(rising_edge_x, high_offset,
 608                                                 width, signal_height);
 609                                 rising_edge_seen = false;
 610                         }
 611
 612                         // Only rising edges start high areas
 613                         if ((*i).second) {
 614                                 rising_edge_x = x;
 615                                 rising_edge_seen = true;
 616                         }
 617                 }
 618
 619                 if (show_sampling_points)
 620                         while (sampling_point_sample < (*i).first) {
 621                                 const float y = (*i).second ? low_offset : high_offset;
 622                                 sampling_points.emplace_back(
 623                                         QRectF(sampling_point_x - (w / 2), y - (w / 2), w, w));
 624                                 sampling_point_sample++;
 625                                 sampling_point_x += pixels_per_sample;
 626                         };
 627         }
 628
 629         // Calculate the sample points from the last edge to the end of the trace
 630         if (show_sampling_points)
 631                 while ((uint64_t)sampling_point_sample <= end_sample) {
 632                         // Signal changed after the last edge, so the level is inverted
 633                         const float y = (edges.cend() - 1)->second ? high_offset : low_offset;
 634                         sampling_points.emplace_back(
 635                                 QRectF(sampling_point_x - (w / 2), y - (w / 2), w, w));
 636                         sampling_point_sample++;
 637                         sampling_point_x += pixels_per_sample;
 638                 };
 639
 640         if (fill_high_areas_) {
 641                 // Add last high rectangle if the signal is still high at the end of the trace
 642                 if (rising_edge_seen && (edges.cend() - 1)->second)
 643                         high_rects.emplace_back(rising_edge_x, high_offset,
 644                                 last_sample_x - rising_edge_x, signal_height);
 645
 646                 p.setPen(high_fill_color_);
 647                 p.setBrush(high_fill_color_);
 648                 p.drawRects((const QRectF*)(high_rects.data()), high_rects.size());
 649         }
 650
 651         p.setPen(LogicSignal::EdgeColor);
 652         p.drawLines(edge_lines, edge_count);
 653         delete[] edge_lines;
 654
 655         // Paint the caps
 656         const unsigned int max_cap_line_count = edges.size();
 657         QLineF *const cap_lines = new QLineF[max_cap_line_count];
 658
 659         p.setPen(LogicSignal::HighColor);
 660         paint_logic_caps(p, cap_lines, edges, true, samples_per_pixel,
 661                 pixels_offset, pp.left(), high_offset);
 662         p.setPen(LogicSignal::LowColor);
 663         paint_logic_caps(p, cap_lines, edges, false, samples_per_pixel,
 664                 pixels_offset, pp.left(), low_offset);
 665
 666         delete[] cap_lines;
 667
 668         // Paint the sampling points
 669         if (show_sampling_points) {
 670                 p.setPen(SamplingPointColor);
 671                 p.drawRects(sampling_points.data(), sampling_points.size());
 672         }
 673 }
 674
 675 void AnalogSignal::paint_logic_caps(QPainter &p, QLineF *const lines,
 676         vector< pair<int64_t, bool> > &edges, bool level,
 677         double samples_per_pixel, double pixels_offset, float x_offset,
 678         float y_offset)
 679 {
 680         QLineF *line = lines;
 681
 682         for (auto i = edges.begin(); i != (edges.end() - 1); i++)
 683                 if ((*i).second == level) {
 684                         *line++ = QLineF(
 685                                 ((*i).first / samples_per_pixel -
 686                                         pixels_offset) + x_offset, y_offset,
 687                                 ((*(i+1)).first / samples_per_pixel -
 688                                         pixels_offset) + x_offset, y_offset);
 689                 }
 690
 691         p.drawLines(lines, line - lines);
 692 }
 693
 694 shared_ptr<pv::data::AnalogSegment> AnalogSignal::get_analog_segment_to_paint() const
 695 {
 696         shared_ptr<pv::data::AnalogSegment> segment;
 697
 698         const deque< shared_ptr<pv::data::AnalogSegment> > &segments =
 699                 base_->analog_data()->analog_segments();
 700
 701         if (!segments.empty()) {
 702                 if (segment_display_mode_ == ShowLastSegmentOnly)
 703                         segment = segments.back();
 704
 705                 if ((segment_display_mode_ == ShowSingleSegmentOnly) ||
 706                                 (segment_display_mode_ == ShowLastCompleteSegmentOnly)) {
 707                         try {
 708                                 segment = segments.at(current_segment_);
 709                         } catch (out_of_range&) {
 710                                 qDebug() << "Current analog segment out of range for signal" << base_->name() << ":" << current_segment_;
 711                         }
 712                 }
 713         }
 714
 715         return segment;
 716 }
 717
 718 shared_ptr<pv::data::LogicSegment> AnalogSignal::get_logic_segment_to_paint() const
 719 {
 720         shared_ptr<pv::data::LogicSegment> segment;
 721
 722         const deque< shared_ptr<pv::data::LogicSegment> > &segments =
 723                 base_->logic_data()->logic_segments();
 724
 725         if (!segments.empty()) {
 726                 if (segment_display_mode_ == ShowLastSegmentOnly)
 727                         segment = segments.back();
 728
 729                 if ((segment_display_mode_ == ShowSingleSegmentOnly) ||
 730                                 (segment_display_mode_ == ShowLastCompleteSegmentOnly)) {
 731                         try {
 732                                 segment = segments.at(current_segment_);
 733                         } catch (out_of_range&) {
 734                                 qDebug() << "Current logic segment out of range for signal" << base_->name() << ":" << current_segment_;
 735                         }
 736                 }
 737         }
 738
 739         return segment;
 740 }
 741
 742 float AnalogSignal::get_resolution(int scale_index)
 743 {
 744         const float seq[] = {1.0f, 2.0f, 5.0f};
 745
 746         const int offset = numeric_limits<int>::max() / (2 * countof(seq));
 747         const div_t d = div((int)(scale_index + countof(seq) * offset),
 748                 countof(seq));
 749
 750         return powf(10.0f, d.quot - offset) * seq[d.rem];
 751 }
 752
 753 void AnalogSignal::update_scale()
 754 {
 755         resolution_ = get_resolution(scale_index_);
 756         scale_ = div_height_ / resolution_;
 757 }
 758
 759 void AnalogSignal::update_conversion_widgets()
 760 {
 761         SignalBase::ConversionType conv_type = base_->get_conversion_type();
 762
 763         // Enable or disable widgets depending on conversion state
 764         conv_threshold_cb_->setEnabled(conv_type != SignalBase::NoConversion);
 765         display_type_cb_->setEnabled(conv_type != SignalBase::NoConversion);
 766
 767         conv_threshold_cb_->clear();
 768
 769         vector < pair<QString, int> > presets = base_->get_conversion_presets();
 770
 771         // Prevent the combo box from firing the "edit text changed" signal
 772         // as that would involuntarily select the first entry
 773         conv_threshold_cb_->blockSignals(true);
 774
 775         // Set available options depending on chosen conversion
 776         for (pair<QString, int>& preset : presets)
 777                 conv_threshold_cb_->addItem(preset.first, preset.second);
 778
 779         map < QString, QVariant > options = base_->get_conversion_options();
 780
 781         if (conv_type == SignalBase::A2LConversionByThreshold) {
 782                 const vector<double> thresholds = base_->get_conversion_thresholds(
 783                                 SignalBase::A2LConversionByThreshold, true);
 784                 conv_threshold_cb_->addItem(
 785                                 QString("%1V").arg(QString::number(thresholds[0], 'f', 1)), -1);
 786         }
 787
 788         if (conv_type == SignalBase::A2LConversionBySchmittTrigger) {
 789                 const vector<double> thresholds = base_->get_conversion_thresholds(
 790                                 SignalBase::A2LConversionBySchmittTrigger, true);
 791                 conv_threshold_cb_->addItem(QString("%1V/%2V").arg(
 792                                 QString::number(thresholds[0], 'f', 1),
 793                                 QString::number(thresholds[1], 'f', 1)), -1);
 794         }
 795
 796         int preset_id = base_->get_current_conversion_preset();
 797         conv_threshold_cb_->setCurrentIndex(
 798                         conv_threshold_cb_->findData(preset_id));
 799
 800         conv_threshold_cb_->blockSignals(false);
 801 }
 802
 803 vector<data::LogicSegment::EdgePair> AnalogSignal::get_nearest_level_changes(uint64_t sample_pos)
 804 {
 805         assert(base_);
 806         assert(owner_);
 807
 808         // Return if there's no logic data or we're showing only the analog trace
 809         if (!base_->logic_data() || (display_type_ == DisplayAnalog))
 810                 return vector<data::LogicSegment::EdgePair>();
 811
 812         if (sample_pos == 0)
 813                 return vector<LogicSegment::EdgePair>();
 814
 815         shared_ptr<LogicSegment> segment = get_logic_segment_to_paint();
 816         if (!segment || (segment->get_sample_count() == 0))
 817                 return vector<LogicSegment::EdgePair>();
 818
 819         const View *view = owner_->view();
 820         assert(view);
 821         const double samples_per_pixel = base_->get_samplerate() * view->scale();
 822
 823         vector<LogicSegment::EdgePair> edges;
 824
 825         segment->get_surrounding_edges(edges, sample_pos,
 826                 samples_per_pixel / LogicSignal::Oversampling, 0);
 827
 828         if (edges.empty())
 829                 return vector<LogicSegment::EdgePair>();
 830
 831         return edges;
 832 }
 833
 834 void AnalogSignal::perform_autoranging(bool keep_divs, bool force_update)
 835 {
 836         const deque< shared_ptr<pv::data::AnalogSegment> > &segments =
 837                 base_->analog_data()->analog_segments();
 838
 839         if (segments.empty())
 840                 return;
 841
 842         static double prev_min = 0, prev_max = 0;
 843         double min = 0, max = 0;
 844
 845         for (const shared_ptr<pv::data::AnalogSegment>& segment : segments) {
 846                 pair<double, double> mm = segment->get_min_max();
 847                 min = std::min(min, mm.first);
 848                 max = std::max(max, mm.second);
 849         }
 850
 851         if ((min == prev_min) && (max == prev_max) && !force_update)
 852                 return;
 853
 854         prev_min = min;
 855         prev_max = max;
 856
 857         // If we're allowed to alter the div assignment...
 858         if (!keep_divs) {
 859                 // Use all divs for the positive range if there are no negative values
 860                 if ((min == 0) && (neg_vdivs_ > 0)) {
 861                         pos_vdivs_ += neg_vdivs_;
 862                         neg_vdivs_ = 0;
 863                 }
 864
 865                 // Split up the divs if there are negative values but no negative divs
 866                 if ((min < 0) && (neg_vdivs_ == 0)) {
 867                         neg_vdivs_ = pos_vdivs_ / 2;
 868                         pos_vdivs_ -= neg_vdivs_;
 869                 }
 870         }
 871
 872         // If there is still no positive div when we need it, add one
 873         // (this can happen when pos_vdivs==neg_vdivs==0)
 874         if ((max > 0) && (pos_vdivs_ == 0)) {
 875                 pos_vdivs_ = 1;
 876                 owner_->extents_changed(false, true);
 877         }
 878
 879         // If there is still no negative div when we need it, add one
 880         // (this can happen when pos_vdivs was 0 or 1 when trying to split)
 881         if ((min < 0) && (neg_vdivs_ == 0)) {
 882                 neg_vdivs_ = 1;
 883                 owner_->extents_changed(false, true);
 884         }
 885
 886         double min_value_per_div;
 887         if ((pos_vdivs_ > 0) && (neg_vdivs_ >  0))
 888                 min_value_per_div = std::max(max / pos_vdivs_, -min / neg_vdivs_);
 889         else if (pos_vdivs_ > 0)
 890                 min_value_per_div = max / pos_vdivs_;
 891         else
 892                 min_value_per_div = -min / neg_vdivs_;
 893
 894         // Find first scale value that is bigger than the value we need
 895         for (int i = MinScaleIndex; i < MaxScaleIndex; i++)
 896                 if (get_resolution(i) > min_value_per_div) {
 897                         scale_index_ = i;
 898                         break;
 899                 }
 900
 901         update_scale();
 902 }
 903
 904 void AnalogSignal::reset_pixel_values()
 905 {
 906         value_at_pixel_pos_.clear();
 907         current_pixel_pos_ = -1;
 908         prev_value_at_pixel_ = std::numeric_limits<float>::quiet_NaN();
 909 }
 910
 911 void AnalogSignal::process_next_sample_value(float x, float value)
 912 {
 913         // Note: NAN is used to indicate the non-existance of a value at this pixel
 914
 915         if (std::isnan(prev_value_at_pixel_)) {
 916                 if (x < 0) {
 917                         min_value_at_pixel_ = value;
 918                         max_value_at_pixel_ = value;
 919                         prev_value_at_pixel_ = value;
 920                         current_pixel_pos_ = x;
 921                 } else
 922                         prev_value_at_pixel_ = std::numeric_limits<float>::quiet_NaN();
 923         }
 924
 925         const int pixel_pos = (int)(x + 0.5);
 926
 927         if (pixel_pos > current_pixel_pos_) {
 928                 if (pixel_pos - current_pixel_pos_ == 1) {
 929                         if (std::isnan(prev_value_at_pixel_)) {
 930                                 value_at_pixel_pos_.push_back(prev_value_at_pixel_);
 931                         } else {
 932                                 // Average the min/max range to create one value for the previous pixel
 933                                 const float avg = (min_value_at_pixel_ + max_value_at_pixel_) / 2;
 934                                 value_at_pixel_pos_.push_back(avg);
 935                         }
 936                 } else {
 937                         // Interpolate values to create values for the intermediate pixels
 938                         const float start_value = prev_value_at_pixel_;
 939                         const float end_value = value;
 940                         const int steps = fabs(pixel_pos - current_pixel_pos_);
 941                         const double gradient = (end_value - start_value) / steps;
 942                         for (int i = 0; i < steps; i++) {
 943                                 if (current_pixel_pos_ + i < 0)
 944                                         continue;
 945                                 value_at_pixel_pos_.push_back(start_value + i * gradient);
 946                         }
 947                 }
 948
 949                 min_value_at_pixel_ = value;
 950                 max_value_at_pixel_ = value;
 951                 prev_value_at_pixel_ = value;
 952                 current_pixel_pos_ = pixel_pos;
 953         } else {
 954                 // Another sample for the same pixel
 955                 if (value < min_value_at_pixel_)
 956                         min_value_at_pixel_ = value;
 957                 if (value > max_value_at_pixel_)
 958                         max_value_at_pixel_ = value;
 959         }
 960 }
 961
 962 void AnalogSignal::populate_popup_form(QWidget *parent, QFormLayout *form)
 963 {
 964         // Add the standard options
 965         Signal::populate_popup_form(parent, form);
 966
 967         QFormLayout *const layout = new QFormLayout;
 968
 969         // Add div-related settings
 970         pvdiv_sb_ = new QSpinBox(parent);
 971         pvdiv_sb_->setRange(0, MaximumVDivs);
 972         pvdiv_sb_->setValue(pos_vdivs_);
 973         connect(pvdiv_sb_, SIGNAL(valueChanged(int)),
 974                 this, SLOT(on_pos_vdivs_changed(int)));
 975         layout->addRow(tr("Number of pos vertical divs"), pvdiv_sb_);
 976
 977         nvdiv_sb_ = new QSpinBox(parent);
 978         nvdiv_sb_->setRange(0, MaximumVDivs);
 979         nvdiv_sb_->setValue(neg_vdivs_);
 980         connect(nvdiv_sb_, SIGNAL(valueChanged(int)),
 981                 this, SLOT(on_neg_vdivs_changed(int)));
 982         layout->addRow(tr("Number of neg vertical divs"), nvdiv_sb_);
 983
 984         div_height_sb_ = new QSpinBox(parent);
 985         div_height_sb_->setRange(20, 1000);
 986         div_height_sb_->setSingleStep(5);
 987         div_height_sb_->setSuffix(tr(" pixels"));
 988         div_height_sb_->setValue(div_height_);
 989         connect(div_height_sb_, SIGNAL(valueChanged(int)),
 990                 this, SLOT(on_div_height_changed(int)));
 991         layout->addRow(tr("Div height"), div_height_sb_);
 992
 993         // Add the vertical resolution
 994         resolution_cb_ = new QComboBox(parent);
 995
 996         for (int i = MinScaleIndex; i < MaxScaleIndex; i++) {
 997                 const QString label = QString("%1").arg(get_resolution(i));
 998                 resolution_cb_->insertItem(0, label, QVariant(i));
 999         }
1000
1001         int cur_idx = resolution_cb_->findData(QVariant(scale_index_));
1002         resolution_cb_->setCurrentIndex(cur_idx);
1003
1004         connect(resolution_cb_, SIGNAL(currentIndexChanged(int)),
1005                 this, SLOT(on_resolution_changed(int)));
1006
1007         QGridLayout *const vdiv_layout = new QGridLayout;
1008         QLabel *const vdiv_unit = new QLabel(tr("V/div"));
1009         vdiv_layout->addWidget(resolution_cb_, 0, 0);
1010         vdiv_layout->addWidget(vdiv_unit, 0, 1);
1011
1012         layout->addRow(tr("Vertical resolution"), vdiv_layout);
1013
1014         // Add the autoranging checkbox
1015         QCheckBox* autoranging_cb = new QCheckBox();
1016         autoranging_cb->setCheckState(autoranging_ ? Qt::Checked : Qt::Unchecked);
1017
1018         connect(autoranging_cb, SIGNAL(stateChanged(int)),
1019                 this, SLOT(on_autoranging_changed(int)));
1020
1021         layout->addRow(tr("Autoranging"), autoranging_cb);
1022
1023         // Add the conversion type dropdown
1024         conversion_cb_ = new QComboBox();
1025
1026         conversion_cb_->addItem(tr("none"),
1027                 SignalBase::NoConversion);
1028         conversion_cb_->addItem(tr("to logic via threshold"),
1029                 SignalBase::A2LConversionByThreshold);
1030         conversion_cb_->addItem(tr("to logic via schmitt-trigger"),
1031                 SignalBase::A2LConversionBySchmittTrigger);
1032
1033         cur_idx = conversion_cb_->findData(QVariant(base_->get_conversion_type()));
1034         conversion_cb_->setCurrentIndex(cur_idx);
1035
1036         layout->addRow(tr("Conversion"), conversion_cb_);
1037
1038         connect(conversion_cb_, SIGNAL(currentIndexChanged(int)),
1039                 this, SLOT(on_conversion_changed(int)));
1040
1041     // Add the conversion threshold settings
1042     conv_threshold_cb_ = new QComboBox();
1043     conv_threshold_cb_->setEditable(true);
1044
1045     layout->addRow(tr("Conversion threshold(s)"), conv_threshold_cb_);
1046
1047     connect(conv_threshold_cb_, SIGNAL(currentIndexChanged(int)),
1048             this, SLOT(on_conv_threshold_changed(int)));
1049     connect(conv_threshold_cb_, SIGNAL(editTextChanged(const QString&)),
1050             this, SLOT(on_conv_threshold_changed()));  // index will be -1
1051
1052         // Add the display type dropdown
1053         display_type_cb_ = new QComboBox();
1054
1055         display_type_cb_->addItem(tr("analog"), DisplayAnalog);
1056         display_type_cb_->addItem(tr("converted"), DisplayConverted);
1057         display_type_cb_->addItem(tr("analog+converted"), DisplayBoth);
1058
1059         cur_idx = display_type_cb_->findData(QVariant(display_type_));
1060         display_type_cb_->setCurrentIndex(cur_idx);
1061
1062         layout->addRow(tr("Show traces for"), display_type_cb_);
1063
1064         connect(display_type_cb_, SIGNAL(currentIndexChanged(int)),
1065                 this, SLOT(on_display_type_changed(int)));
1066
1067         // Update the conversion widget contents and states
1068         update_conversion_widgets();
1069
1070         form->addRow(layout);
1071 }
1072
1073 void AnalogSignal::hover_point_changed(const QPoint &hp)
1074 {
1075         Signal::hover_point_changed(hp);
1076
1077         // Note: Even though the view area begins at 0, we exclude 0 because
1078         // that's also the value given when the cursor is over the header to the
1079         // left of the trace paint area
1080         if (hp.x() <= 0) {
1081                 value_at_hover_pos_ = std::numeric_limits<float>::quiet_NaN();
1082         } else {
1083                 try {
1084                         value_at_hover_pos_ = value_at_pixel_pos_.at(hp.x());
1085                 } catch (out_of_range&) {
1086                         value_at_hover_pos_ = std::numeric_limits<float>::quiet_NaN();
1087                 }
1088         }
1089 }
1090
1091 void AnalogSignal::on_setting_changed(const QString &key, const QVariant &value)
1092 {
1093         Signal::on_setting_changed(key, value);
1094
1095         if (key == GlobalSettings::Key_View_ShowSamplingPoints)
1096                 show_sampling_points_ = value.toBool();
1097
1098         if (key == GlobalSettings::Key_View_FillSignalHighAreas)
1099                 fill_high_areas_ = value.toBool();
1100
1101         if (key == GlobalSettings::Key_View_FillSignalHighAreaColor)
1102                 high_fill_color_ = QColor::fromRgba(value.value<uint32_t>());
1103
1104         if (key == GlobalSettings::Key_View_ShowAnalogMinorGrid)
1105                 show_analog_minor_grid_ = value.toBool();
1106
1107         if (key == GlobalSettings::Key_View_ConversionThresholdDispMode) {
1108                 conversion_threshold_disp_mode_ = value.toInt();
1109
1110                 if (owner_)
1111                         owner_->row_item_appearance_changed(false, true);
1112         }
1113 }
1114
1115 void AnalogSignal::on_min_max_changed(float min, float max)
1116 {
1117         (void)min;
1118         (void)max;
1119
1120         if (autoranging_)
1121                 perform_autoranging(false, false);
1122 }
1123
1124 void AnalogSignal::on_pos_vdivs_changed(int vdivs)
1125 {
1126         if (vdivs == pos_vdivs_)
1127                 return;
1128
1129         pos_vdivs_ = vdivs;
1130
1131         // There has to be at least one div, positive or negative
1132         if ((neg_vdivs_ == 0) && (pos_vdivs_ == 0)) {
1133                 pos_vdivs_ = 1;
1134                 if (pvdiv_sb_)
1135                         pvdiv_sb_->setValue(pos_vdivs_);
1136         }
1137
1138         if (autoranging_) {
1139                 perform_autoranging(true, true);
1140
1141                 // It could be that a positive or negative div was added, so update
1142                 if (pvdiv_sb_) {
1143                         pvdiv_sb_->setValue(pos_vdivs_);
1144                         nvdiv_sb_->setValue(neg_vdivs_);
1145                 }
1146         }
1147
1148         if (owner_) {
1149                 // Call order is important, otherwise the lazy event handler won't work
1150                 owner_->extents_changed(false, true);
1151                 owner_->row_item_appearance_changed(false, true);
1152         }
1153 }
1154
1155 void AnalogSignal::on_neg_vdivs_changed(int vdivs)
1156 {
1157         if (vdivs == neg_vdivs_)
1158                 return;
1159
1160         neg_vdivs_ = vdivs;
1161
1162         // There has to be at least one div, positive or negative
1163         if ((neg_vdivs_ == 0) && (pos_vdivs_ == 0)) {
1164                 pos_vdivs_ = 1;
1165                 if (pvdiv_sb_)
1166                         pvdiv_sb_->setValue(pos_vdivs_);
1167         }
1168
1169         if (autoranging_) {
1170                 perform_autoranging(true, true);
1171
1172                 // It could be that a positive or negative div was added, so update
1173                 if (pvdiv_sb_) {
1174                         pvdiv_sb_->setValue(pos_vdivs_);
1175                         nvdiv_sb_->setValue(neg_vdivs_);
1176                 }
1177         }
1178
1179         if (owner_) {
1180                 // Call order is important, otherwise the lazy event handler won't work
1181                 owner_->extents_changed(false, true);
1182                 owner_->row_item_appearance_changed(false, true);
1183         }
1184 }
1185
1186 void AnalogSignal::on_div_height_changed(int height)
1187 {
1188         div_height_ = height;
1189         update_scale();
1190
1191         if (owner_) {
1192                 // Call order is important, otherwise the lazy event handler won't work
1193                 owner_->extents_changed(false, true);
1194                 owner_->row_item_appearance_changed(false, true);
1195         }
1196 }
1197
1198 void AnalogSignal::on_resolution_changed(int index)
1199 {
1200         scale_index_ = resolution_cb_->itemData(index).toInt();
1201         update_scale();
1202
1203         if (owner_)
1204                 owner_->row_item_appearance_changed(false, true);
1205 }
1206
1207 void AnalogSignal::on_autoranging_changed(int state)
1208 {
1209         autoranging_ = (state == Qt::Checked);
1210
1211         if (autoranging_)
1212                 perform_autoranging(false, true);
1213
1214         if (owner_) {
1215                 // Call order is important, otherwise the lazy event handler won't work
1216                 owner_->extents_changed(false, true);
1217                 owner_->row_item_appearance_changed(false, true);
1218         }
1219 }
1220
1221 void AnalogSignal::on_conversion_changed(int index)
1222 {
1223         SignalBase::ConversionType old_conv_type = base_->get_conversion_type();
1224
1225         SignalBase::ConversionType conv_type =
1226                 (SignalBase::ConversionType)(conversion_cb_->itemData(index).toInt());
1227
1228         if (conv_type != old_conv_type) {
1229                 base_->set_conversion_type(conv_type);
1230                 update_conversion_widgets();
1231
1232                 if (owner_)
1233                         owner_->row_item_appearance_changed(false, true);
1234         }
1235 }
1236
1237 void AnalogSignal::on_conv_threshold_changed(int index)
1238 {
1239         SignalBase::ConversionType conv_type = base_->get_conversion_type();
1240
1241         // Note: index is set to -1 if the text in the combo box matches none of
1242         // the entries in the combo box
1243
1244         if ((index == -1) && (conv_threshold_cb_->currentText().length() == 0))
1245                 return;
1246
1247         // The combo box entry with the custom value has user_data set to -1
1248         const int user_data = conv_threshold_cb_->findText(
1249                         conv_threshold_cb_->currentText());
1250
1251         const bool use_custom_thr = (index == -1) || (user_data == -1);
1252
1253         if (conv_type == SignalBase::A2LConversionByThreshold && use_custom_thr) {
1254                 // Not one of the preset values, try to parse the combo box text
1255                 // Note: Regex loosely based on
1256                 // https://txt2re.com/index-c++.php3?s=0.1V&1&-13
1257                 QString re1 = "([+-]?\\d*[\\.,]?\\d*)"; // Float value
1258                 QString re2 = "([a-zA-Z]*)"; // SI unit
1259                 QRegExp regex(re1 + re2);
1260
1261                 const QString text = conv_threshold_cb_->currentText();
1262                 if (!regex.exactMatch(text))
1263                         return;  // String doesn't match the regex
1264
1265                 QStringList tokens = regex.capturedTexts();
1266
1267                 // For now, we simply assume that the unit is volt without modifiers
1268                 const double thr = tokens.at(1).toDouble();
1269
1270                 // Only restart the conversion if the threshold was updated.
1271                 // We're starting a delayed conversion because the user may still be
1272                 // typing and the UI would lag if we kept on restarting it immediately
1273                 if (base_->set_conversion_option("threshold_value", thr))
1274                         base_->start_conversion(true);
1275         }
1276
1277         if (conv_type == SignalBase::A2LConversionBySchmittTrigger && use_custom_thr) {
1278                 // Not one of the preset values, try to parse the combo box text
1279                 // Note: Regex loosely based on
1280                 // https://txt2re.com/index-c++.php3?s=0.1V/0.2V&2&14&-22&3&15
1281                 QString re1 = "([+-]?\\d*[\\.,]?\\d*)"; // Float value
1282                 QString re2 = "([a-zA-Z]*)"; // SI unit
1283                 QString re3 = "\\/"; // Forward slash, not captured
1284                 QString re4 = "([+-]?\\d*[\\.,]?\\d*)"; // Float value
1285                 QString re5 = "([a-zA-Z]*)"; // SI unit
1286                 QRegExp regex(re1 + re2 + re3 + re4 + re5);
1287
1288                 const QString text = conv_threshold_cb_->currentText();
1289                 if (!regex.exactMatch(text))
1290                         return;  // String doesn't match the regex
1291
1292                 QStringList tokens = regex.capturedTexts();
1293
1294                 // For now, we simply assume that the unit is volt without modifiers
1295                 const double low_thr = tokens.at(1).toDouble();
1296                 const double high_thr = tokens.at(3).toDouble();
1297
1298                 // Only restart the conversion if one of the options was updated.
1299                 // We're starting a delayed conversion because the user may still be
1300                 // typing and the UI would lag if we kept on restarting it immediately
1301                 bool o1 = base_->set_conversion_option("threshold_value_low", low_thr);
1302                 bool o2 = base_->set_conversion_option("threshold_value_high", high_thr);
1303                 if (o1 || o2)
1304                         base_->start_conversion(true);  // Start delayed conversion
1305         }
1306
1307         base_->set_conversion_preset((SignalBase::ConversionPreset)index);
1308
1309         // Immediately start the conversion if we're not using custom values
1310         // (i.e. we're using one of the presets)
1311         if (!use_custom_thr)
1312                 base_->start_conversion();
1313 }
1314
1315 void AnalogSignal::on_delayed_conversion_starter()
1316 {
1317         base_->start_conversion();
1318 }
1319
1320 void AnalogSignal::on_display_type_changed(int index)
1321 {
1322         display_type_ = (DisplayType)(display_type_cb_->itemData(index).toInt());
1323
1324         if (owner_)
1325                 owner_->row_item_appearance_changed(false, true);
1326 }
1327
1328 } // namespace trace
1329 } // namespace views
1330 } // namespace pv