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 using pv::util::determine_value_prefix;
  69
  70 namespace pv {
  71 namespace views {
  72 namespace trace {
  73
  74 const QColor AnalogSignal::SignalColors[4] = {
  75         QColor(0xC4, 0xA0, 0x00),       // Yellow
  76         QColor(0x87, 0x20, 0x7A),       // Magenta
  77         QColor(0x20, 0x4A, 0x87),       // Blue
  78         QColor(0x4E, 0x9A, 0x06)        // Green
  79 };
  80
  81 const QPen AnalogSignal::AxisPen(QColor(0, 0, 0, 30 * 256 / 100), 2);
  82 const QColor AnalogSignal::GridMajorColor = QColor(0, 0, 0, 40 * 256 / 100);
  83 const QColor AnalogSignal::GridMinorColor = QColor(0, 0, 0, 20 * 256 / 100);
  84
  85 const QColor AnalogSignal::SamplingPointColor(0x77, 0x77, 0x77);
  86 const QColor AnalogSignal::SamplingPointColorLo = QColor(200, 0, 0, 80 * 256 / 100);
  87 const QColor AnalogSignal::SamplingPointColorNe = QColor(0,   0, 0, 80 * 256 / 100);
  88 const QColor AnalogSignal::SamplingPointColorHi = QColor(0, 200, 0, 80 * 256 / 100);
  89
  90 const QColor AnalogSignal::ThresholdColor = QColor(0, 0, 0, 30 * 256 / 100);
  91 const QColor AnalogSignal::ThresholdColorLo = QColor(255, 0, 0, 8 * 256 / 100);
  92 const QColor AnalogSignal::ThresholdColorNe = QColor(0,   0, 0, 10 * 256 / 100);
  93 const QColor AnalogSignal::ThresholdColorHi = QColor(0, 255, 0, 8 * 256 / 100);
  94
  95 const int64_t AnalogSignal::TracePaintBlockSize = 1024 * 1024;  // 4 MiB (due to float)
  96 const float AnalogSignal::EnvelopeThreshold = 64.0f;
  97
  98 const int AnalogSignal::MaximumVDivs = 10;
  99 const int AnalogSignal::MinScaleIndex = -6;  // 0.01 units/div
 100 const int AnalogSignal::MaxScaleIndex = 10;  // 1000 units/div
 101
 102 const int AnalogSignal::InfoTextMarginRight = 20;
 103 const int AnalogSignal::InfoTextMarginBottom = 5;
 104
 105 AnalogSignal::AnalogSignal(
 106         pv::Session &session,
 107         shared_ptr<data::SignalBase> base) :
 108         Signal(session, base),
 109         value_at_hover_pos_(std::numeric_limits<float>::quiet_NaN()),
 110         scale_index_(4), // 20 per div
 111         pos_vdivs_(1),
 112         neg_vdivs_(1),
 113         resolution_(0),
 114         display_type_(DisplayBoth),
 115         autoranging_(true)
 116 {
 117         axis_pen_ = AxisPen;
 118
 119         pv::data::Analog* analog_data =
 120                 dynamic_cast<pv::data::Analog*>(data().get());
 121
 122         connect(analog_data, SIGNAL(min_max_changed(float, float)),
 123                 this, SLOT(on_min_max_changed(float, float)));
 124
 125         GlobalSettings settings;
 126         show_sampling_points_ =
 127                 settings.value(GlobalSettings::Key_View_ShowSamplingPoints).toBool();
 128         fill_high_areas_ =
 129                 settings.value(GlobalSettings::Key_View_FillSignalHighAreas).toBool();
 130         high_fill_color_ = QColor::fromRgba(settings.value(
 131                 GlobalSettings::Key_View_FillSignalHighAreaColor).value<uint32_t>());
 132         show_analog_minor_grid_ =
 133                 settings.value(GlobalSettings::Key_View_ShowAnalogMinorGrid).toBool();
 134         conversion_threshold_disp_mode_ =
 135                 settings.value(GlobalSettings::Key_View_ConversionThresholdDispMode).toInt();
 136         div_height_ = settings.value(GlobalSettings::Key_View_DefaultDivHeight).toInt();
 137
 138         base_->set_color(SignalColors[base_->index() % countof(SignalColors)]);
 139         update_scale();
 140 }
 141
 142 shared_ptr<pv::data::SignalData> AnalogSignal::data() const
 143 {
 144         return base_->analog_data();
 145 }
 146
 147 std::map<QString, QVariant> AnalogSignal::save_settings() const
 148 {
 149         std::map<QString, QVariant> result;
 150
 151         result["pos_vdivs"] = pos_vdivs_;
 152         result["neg_vdivs"] = neg_vdivs_;
 153         result["scale_index"] = scale_index_;
 154         result["display_type"] = display_type_;
 155         result["autoranging"] = pos_vdivs_;
 156         result["div_height"] = div_height_;
 157
 158         return result;
 159 }
 160
 161 void AnalogSignal::restore_settings(std::map<QString, QVariant> settings)
 162 {
 163         auto entry = settings.find("pos_vdivs");
 164         if (entry != settings.end())
 165                 pos_vdivs_ = settings["pos_vdivs"].toInt();
 166
 167         entry = settings.find("neg_vdivs");
 168         if (entry != settings.end())
 169                 neg_vdivs_ = settings["neg_vdivs"].toInt();
 170
 171         entry = settings.find("scale_index");
 172         if (entry != settings.end()) {
 173                 scale_index_ = settings["scale_index"].toInt();
 174                 update_scale();
 175         }
 176
 177         entry = settings.find("display_type");
 178         if (entry != settings.end())
 179                 display_type_ = (DisplayType)(settings["display_type"].toInt());
 180
 181         entry = settings.find("autoranging");
 182         if (entry != settings.end())
 183                 autoranging_ = settings["autoranging"].toBool();
 184
 185         entry = settings.find("div_height");
 186         if (entry != settings.end()) {
 187                 const int old_height = div_height_;
 188                 div_height_ = settings["div_height"].toInt();
 189
 190                 if ((div_height_ != old_height) && owner_) {
 191                         // Call order is important, otherwise the lazy event handler won't work
 192                         owner_->extents_changed(false, true);
 193                         owner_->row_item_appearance_changed(false, true);
 194                 }
 195         }
 196 }
 197
 198 pair<int, int> AnalogSignal::v_extents() const
 199 {
 200         const int ph = pos_vdivs_ * div_height_;
 201         const int nh = neg_vdivs_ * div_height_;
 202         return make_pair(-ph, nh);
 203 }
 204
 205 void AnalogSignal::paint_back(QPainter &p, ViewItemPaintParams &pp)
 206 {
 207         if (!base_->enabled())
 208                 return;
 209
 210         bool paint_thr_bg =
 211                 conversion_threshold_disp_mode_ == GlobalSettings::ConvThrDispMode_Background;
 212
 213         const vector<double> thresholds = base_->get_conversion_thresholds();
 214
 215         // Only display thresholds if we have some and we show analog samples
 216         if ((thresholds.size() > 0) && paint_thr_bg &&
 217                 ((display_type_ == DisplayAnalog) || (display_type_ == DisplayBoth))) {
 218
 219                 const int visual_y = get_visual_y();
 220                 const pair<int, int> extents = v_extents();
 221                 const int top = visual_y + extents.first;
 222                 const int btm = visual_y + extents.second;
 223
 224                 // Draw high/neutral/low areas
 225                 if (thresholds.size() == 2) {
 226                         int thr_lo = visual_y - thresholds[0] * scale_;
 227                         int thr_hi = visual_y - thresholds[1] * scale_;
 228                         thr_lo = min(max(thr_lo, top), btm);
 229                         thr_hi = min(max(thr_hi, top), btm);
 230
 231                         p.fillRect(QRectF(pp.left(), top, pp.width(), thr_hi - top),
 232                                 QBrush(ThresholdColorHi));
 233                         p.fillRect(QRectF(pp.left(), thr_hi, pp.width(), thr_lo - thr_hi),
 234                                 QBrush(ThresholdColorNe));
 235                         p.fillRect(QRectF(pp.left(), thr_lo, pp.width(), btm - thr_lo),
 236                                 QBrush(ThresholdColorLo));
 237                 } else {
 238                         int thr = visual_y - thresholds[0] * scale_;
 239                         thr = min(max(thr, top), btm);
 240
 241                         p.fillRect(QRectF(pp.left(), top, pp.width(), thr - top),
 242                                 QBrush(ThresholdColorHi));
 243                         p.fillRect(QRectF(pp.left(), thr, pp.width(), btm - thr),
 244                                 QBrush(ThresholdColorLo));
 245                 }
 246
 247                 paint_axis(p, pp, get_visual_y());
 248         } else {
 249                 Signal::paint_back(p, pp);
 250                 paint_axis(p, pp, get_visual_y());
 251         }
 252 }
 253
 254 void AnalogSignal::paint_mid(QPainter &p, ViewItemPaintParams &pp)
 255 {
 256         assert(base_->analog_data());
 257         assert(owner_);
 258
 259         const int y = get_visual_y();
 260
 261         if (!base_->enabled())
 262                 return;
 263
 264         if ((display_type_ == DisplayAnalog) || (display_type_ == DisplayBoth)) {
 265                 paint_grid(p, y, pp.left(), pp.right());
 266
 267                 shared_ptr<pv::data::AnalogSegment> segment = get_analog_segment_to_paint();
 268                 if (!segment || (segment->get_sample_count() == 0))
 269                         return;
 270
 271                 const double pixels_offset = pp.pixels_offset();
 272                 const double samplerate = max(1.0, segment->samplerate());
 273                 const pv::util::Timestamp& start_time = segment->start_time();
 274                 const int64_t last_sample = (int64_t)segment->get_sample_count() - 1;
 275                 const double samples_per_pixel = samplerate * pp.scale();
 276                 const pv::util::Timestamp start = samplerate * (pp.offset() - start_time);
 277                 const pv::util::Timestamp end = start + samples_per_pixel * pp.width();
 278
 279                 const int64_t start_sample = min(max(floor(start).convert_to<int64_t>(),
 280                         (int64_t)0), last_sample);
 281                 const int64_t end_sample = min(max((ceil(end) + 1).convert_to<int64_t>(),
 282                         (int64_t)0), last_sample);
 283
 284                 if (samples_per_pixel < EnvelopeThreshold)
 285                         paint_trace(p, segment, y, pp.left(), start_sample, end_sample,
 286                                 pixels_offset, samples_per_pixel);
 287                 else
 288                         paint_envelope(p, segment, y, pp.left(), start_sample, end_sample,
 289                                 pixels_offset, samples_per_pixel);
 290         }
 291
 292         if ((display_type_ == DisplayConverted) || (display_type_ == DisplayBoth))
 293                 paint_logic_mid(p, pp);
 294 }
 295
 296 void AnalogSignal::paint_fore(QPainter &p, ViewItemPaintParams &pp)
 297 {
 298         if (!enabled())
 299                 return;
 300
 301         if ((display_type_ == DisplayAnalog) || (display_type_ == DisplayBoth)) {
 302                 const int y = get_visual_y();
 303
 304                 QString infotext;
 305
 306                 SIPrefix prefix;
 307                 if (fabs(signal_max_) > fabs(signal_min_))
 308                         prefix = determine_value_prefix(fabs(signal_max_));
 309                 else
 310                         prefix = determine_value_prefix(fabs(signal_min_));
 311
 312                 // Show the info section on the right side of the trace, including
 313                 // the value at the hover point when the hover marker is enabled
 314                 // and we have corresponding data available
 315                 if (show_hover_marker_ && !std::isnan(value_at_hover_pos_)) {
 316                         infotext = QString("[%1] %2 V/div")
 317                                 .arg(format_value_si(value_at_hover_pos_, prefix, 3, "V", false))
 318                                 .arg(resolution_);
 319                 } else
 320                         infotext = QString("%1 V/div").arg(resolution_);
 321
 322                 p.setPen(base_->color());
 323                 p.setFont(QApplication::font());
 324
 325                 const QRectF bounding_rect = QRectF(pp.left(),
 326                                 y + v_extents().first,
 327                                 pp.width() - InfoTextMarginRight,
 328                                 v_extents().second - v_extents().first - InfoTextMarginBottom);
 329
 330                 p.drawText(bounding_rect, Qt::AlignRight | Qt::AlignBottom, infotext);
 331         }
 332
 333         if (show_hover_marker_)
 334                 paint_hover_marker(p);
 335 }
 336
 337 void AnalogSignal::paint_grid(QPainter &p, int y, int left, int right)
 338 {
 339         bool was_antialiased = p.testRenderHint(QPainter::Antialiasing);
 340         p.setRenderHint(QPainter::Antialiasing, false);
 341
 342         if (pos_vdivs_ > 0) {
 343                 p.setPen(QPen(GridMajorColor, 1, Qt::DashLine));
 344                 for (int i = 1; i <= pos_vdivs_; i++) {
 345                         const float dy = i * div_height_;
 346                         p.drawLine(QLineF(left, y - dy, right, y - dy));
 347                 }
 348         }
 349
 350         if ((pos_vdivs_ > 0) && show_analog_minor_grid_) {
 351                 p.setPen(QPen(GridMinorColor, 1, Qt::DashLine));
 352                 for (int i = 0; i < pos_vdivs_; i++) {
 353                         const float dy = i * div_height_;
 354                         const float dy25 = dy + (0.25 * div_height_);
 355                         const float dy50 = dy + (0.50 * div_height_);
 356                         const float dy75 = dy + (0.75 * div_height_);
 357                         p.drawLine(QLineF(left, y - dy25, right, y - dy25));
 358                         p.drawLine(QLineF(left, y - dy50, right, y - dy50));
 359                         p.drawLine(QLineF(left, y - dy75, right, y - dy75));
 360                 }
 361         }
 362
 363         if (neg_vdivs_ > 0) {
 364                 p.setPen(QPen(GridMajorColor, 1, Qt::DashLine));
 365                 for (int i = 1; i <= neg_vdivs_; i++) {
 366                         const float dy = i * div_height_;
 367                         p.drawLine(QLineF(left, y + dy, right, y + dy));
 368                 }
 369         }
 370
 371         if ((pos_vdivs_ > 0) && show_analog_minor_grid_) {
 372                 p.setPen(QPen(GridMinorColor, 1, Qt::DashLine));
 373                 for (int i = 0; i < neg_vdivs_; i++) {
 374                         const float dy = i * div_height_;
 375                         const float dy25 = dy + (0.25 * div_height_);
 376                         const float dy50 = dy + (0.50 * div_height_);
 377                         const float dy75 = dy + (0.75 * div_height_);
 378                         p.drawLine(QLineF(left, y + dy25, right, y + dy25));
 379                         p.drawLine(QLineF(left, y + dy50, right, y + dy50));
 380                         p.drawLine(QLineF(left, y + dy75, right, y + dy75));
 381                 }
 382         }
 383
 384         p.setRenderHint(QPainter::Antialiasing, was_antialiased);
 385 }
 386
 387 void AnalogSignal::paint_trace(QPainter &p,
 388         const shared_ptr<pv::data::AnalogSegment> &segment,
 389         int y, int left, const int64_t start, const int64_t end,
 390         const double pixels_offset, const double samples_per_pixel)
 391 {
 392         if (end <= start)
 393                 return;
 394
 395         bool paint_thr_dots =
 396                 (base_->get_conversion_type() != data::SignalBase::NoConversion) &&
 397                 (conversion_threshold_disp_mode_ == GlobalSettings::ConvThrDispMode_Dots);
 398
 399         vector<double> thresholds;
 400         if (paint_thr_dots)
 401                 thresholds = base_->get_conversion_thresholds();
 402
 403         // Calculate and paint the sampling points if enabled and useful
 404         GlobalSettings settings;
 405         const bool show_sampling_points =
 406                 (show_sampling_points_ || paint_thr_dots) && (samples_per_pixel < 0.25);
 407
 408         p.setPen(base_->color());
 409
 410         const int64_t points_count = end - start + 1;
 411
 412         QPointF *points = new QPointF[points_count];
 413         QPointF *point = points;
 414
 415         vector<QRectF> sampling_points[3];
 416
 417         int64_t sample_count = min(points_count, TracePaintBlockSize);
 418         int64_t block_sample = 0;
 419         float *sample_block = new float[TracePaintBlockSize];
 420         segment->get_samples(start, start + sample_count, sample_block);
 421
 422         if (show_hover_marker_)
 423                 reset_pixel_values();
 424
 425         const int w = 2;
 426         for (int64_t sample = start; sample <= end; sample++, block_sample++) {
 427
 428                 // Fetch next block of samples if we finished the current one
 429                 if (block_sample == TracePaintBlockSize) {
 430                         block_sample = 0;
 431                         sample_count = min(points_count - sample, TracePaintBlockSize);
 432                         segment->get_samples(sample, sample + sample_count, sample_block);
 433                 }
 434
 435                 const float abs_x = sample / samples_per_pixel - pixels_offset;
 436                 const float x = left + abs_x;
 437
 438                 *point++ = QPointF(x, y - sample_block[block_sample] * scale_);
 439
 440                 // Generate the pixel<->value lookup table for the mouse hover
 441                 if (show_hover_marker_)
 442                         process_next_sample_value(abs_x, sample_block[block_sample]);
 443
 444                 // Create the sampling points if needed
 445                 if (show_sampling_points) {
 446                         int idx = 0;  // Neutral
 447
 448                         if (paint_thr_dots) {
 449                                 if (thresholds.size() == 1)
 450                                         idx = (sample_block[block_sample] >= thresholds[0]) ? 2 : 1;
 451                                 else if (thresholds.size() == 2) {
 452                                         if (sample_block[block_sample] > thresholds[1])
 453                                                 idx = 2;  // High
 454                                         else if (sample_block[block_sample] < thresholds[0])
 455                                                 idx = 1;  // Low
 456                                 }
 457                         }
 458
 459                         sampling_points[idx].emplace_back(x - (w / 2), y - sample_block[block_sample] * scale_ - (w / 2), w, w);
 460                 }
 461         }
 462         delete[] sample_block;
 463
 464         // QPainter::drawPolyline() is slow, let's paint the lines ourselves
 465         for (int64_t i = 1; i < points_count; i++)
 466                 p.drawLine(points[i - 1], points[i]);
 467
 468         if (show_sampling_points) {
 469                 if (paint_thr_dots) {
 470                         p.setPen(SamplingPointColorNe);
 471                         p.drawRects(sampling_points[0].data(), sampling_points[0].size());
 472                         p.setPen(SamplingPointColorLo);
 473                         p.drawRects(sampling_points[1].data(), sampling_points[1].size());
 474                         p.setPen(SamplingPointColorHi);
 475                         p.drawRects(sampling_points[2].data(), sampling_points[2].size());
 476                 } else {
 477                         p.setPen(SamplingPointColor);
 478                         p.drawRects(sampling_points[0].data(), sampling_points[0].size());
 479                 }
 480         }
 481
 482         delete[] points;
 483 }
 484
 485 void AnalogSignal::paint_envelope(QPainter &p,
 486         const shared_ptr<pv::data::AnalogSegment> &segment,
 487         int y, int left, const int64_t start, const int64_t end,
 488         const double pixels_offset, const double samples_per_pixel)
 489 {
 490         using pv::data::AnalogSegment;
 491
 492         // Note: Envelope painting currently doesn't generate a pixel<->value lookup table
 493         if (show_hover_marker_)
 494                 reset_pixel_values();
 495
 496         AnalogSegment::EnvelopeSection e;
 497         segment->get_envelope_section(e, start, end, samples_per_pixel);
 498
 499         if (e.length < 2)
 500                 return;
 501
 502         p.setPen(QPen(Qt::NoPen));
 503         p.setBrush(base_->color());
 504
 505         QRectF *const rects = new QRectF[e.length];
 506         QRectF *rect = rects;
 507
 508         for (uint64_t sample = 0; sample < e.length - 1; sample++) {
 509                 const float x = ((e.scale * sample + e.start) /
 510                         samples_per_pixel - pixels_offset) + left;
 511
 512                 const AnalogSegment::EnvelopeSample *const s = e.samples + sample;
 513
 514                 // We overlap this sample with the next so that vertical
 515                 // gaps do not appear during steep rising or falling edges
 516                 const float b = y - max(s->max, (s + 1)->min) * scale_;
 517                 const float t = y - min(s->min, (s + 1)->max) * scale_;
 518
 519                 float h = b - t;
 520                 if (h >= 0.0f && h <= 1.0f)
 521                         h = 1.0f;
 522                 if (h <= 0.0f && h >= -1.0f)
 523                         h = -1.0f;
 524
 525                 *rect++ = QRectF(x, t, 1.0f, h);
 526         }
 527
 528         p.drawRects(rects, e.length);
 529
 530         delete[] rects;
 531         delete[] e.samples;
 532 }
 533
 534 void AnalogSignal::paint_logic_mid(QPainter &p, ViewItemPaintParams &pp)
 535 {
 536         QLineF *line;
 537
 538         vector< pair<int64_t, bool> > edges;
 539
 540         assert(base_);
 541
 542         const int y = get_visual_y();
 543
 544         if (!base_->enabled() || !base_->logic_data())
 545                 return;
 546
 547         const int signal_margin =
 548                 QFontMetrics(QApplication::font()).height() / 2;
 549
 550         const int ph = min(pos_vdivs_, 1) * div_height_;
 551         const int nh = min(neg_vdivs_, 1) * div_height_;
 552         const float high_offset = y - ph + signal_margin + 0.5f;
 553         const float low_offset = y + nh - signal_margin - 0.5f;
 554         const float signal_height = low_offset - high_offset;
 555
 556         shared_ptr<pv::data::LogicSegment> segment = get_logic_segment_to_paint();
 557         if (!segment || (segment->get_sample_count() == 0))
 558                 return;
 559
 560         double samplerate = segment->samplerate();
 561
 562         // Show sample rate as 1Hz when it is unknown
 563         if (samplerate == 0.0)
 564                 samplerate = 1.0;
 565
 566         const double pixels_offset = pp.pixels_offset();
 567         const pv::util::Timestamp& start_time = segment->start_time();
 568         const int64_t last_sample = (int64_t)segment->get_sample_count() - 1;
 569         const double samples_per_pixel = samplerate * pp.scale();
 570         const double pixels_per_sample = 1 / samples_per_pixel;
 571         const pv::util::Timestamp start = samplerate * (pp.offset() - start_time);
 572         const pv::util::Timestamp end = start + samples_per_pixel * pp.width();
 573
 574         const int64_t start_sample = min(max(floor(start).convert_to<int64_t>(),
 575                 (int64_t)0), last_sample);
 576         const uint64_t end_sample = min(max(ceil(end).convert_to<int64_t>(),
 577                 (int64_t)0), last_sample);
 578
 579         segment->get_subsampled_edges(edges, start_sample, end_sample,
 580                 samples_per_pixel / LogicSignal::Oversampling, 0);
 581         assert(edges.size() >= 2);
 582
 583         const float first_sample_x =
 584                 pp.left() + (edges.front().first / samples_per_pixel - pixels_offset);
 585         const float last_sample_x =
 586                 pp.left() + (edges.back().first / samples_per_pixel - pixels_offset);
 587
 588         // Check whether we need to paint the sampling points
 589         const bool show_sampling_points = show_sampling_points_ && (samples_per_pixel < 0.25);
 590         vector<QRectF> sampling_points;
 591         float sampling_point_x = first_sample_x;
 592         int64_t sampling_point_sample = start_sample;
 593         const int w = 2;
 594
 595         if (show_sampling_points)
 596                 sampling_points.reserve(end_sample - start_sample + 1);
 597
 598         vector<QRectF> high_rects;
 599         float rising_edge_x;
 600         bool rising_edge_seen = false;
 601
 602         // Paint the edges
 603         const unsigned int edge_count = edges.size() - 2;
 604         QLineF *const edge_lines = new QLineF[edge_count];
 605         line = edge_lines;
 606
 607         if (edges.front().second) {
 608                 // Beginning of trace is high
 609                 rising_edge_x = first_sample_x;
 610                 rising_edge_seen = true;
 611         }
 612
 613         for (auto i = edges.cbegin() + 1; i != edges.cend() - 1; i++) {
 614                 // Note: multiple edges occupying a single pixel are represented by an edge
 615                 // with undefined logic level. This means that only the first falling edge
 616                 // after a rising edge corresponds to said rising edge - and vice versa. If
 617                 // more edges with the same logic level follow, they denote multiple edges.
 618
 619                 const float x = pp.left() + ((*i).first / samples_per_pixel - pixels_offset);
 620                 *line++ = QLineF(x, high_offset, x, low_offset);
 621
 622                 if (fill_high_areas_) {
 623                         // Any edge terminates a high area
 624                         if (rising_edge_seen) {
 625                                 const int width = x - rising_edge_x;
 626                                 if (width > 0)
 627                                         high_rects.emplace_back(rising_edge_x, high_offset,
 628                                                 width, signal_height);
 629                                 rising_edge_seen = false;
 630                         }
 631
 632                         // Only rising edges start high areas
 633                         if ((*i).second) {
 634                                 rising_edge_x = x;
 635                                 rising_edge_seen = true;
 636                         }
 637                 }
 638
 639                 if (show_sampling_points)
 640                         while (sampling_point_sample < (*i).first) {
 641                                 const float y = (*i).second ? low_offset : high_offset;
 642                                 sampling_points.emplace_back(
 643                                         QRectF(sampling_point_x - (w / 2), y - (w / 2), w, w));
 644                                 sampling_point_sample++;
 645                                 sampling_point_x += pixels_per_sample;
 646                         };
 647         }
 648
 649         // Calculate the sample points from the last edge to the end of the trace
 650         if (show_sampling_points)
 651                 while ((uint64_t)sampling_point_sample <= end_sample) {
 652                         // Signal changed after the last edge, so the level is inverted
 653                         const float y = (edges.cend() - 1)->second ? high_offset : low_offset;
 654                         sampling_points.emplace_back(
 655                                 QRectF(sampling_point_x - (w / 2), y - (w / 2), w, w));
 656                         sampling_point_sample++;
 657                         sampling_point_x += pixels_per_sample;
 658                 };
 659
 660         if (fill_high_areas_) {
 661                 // Add last high rectangle if the signal is still high at the end of the trace
 662                 if (rising_edge_seen && (edges.cend() - 1)->second)
 663                         high_rects.emplace_back(rising_edge_x, high_offset,
 664                                 last_sample_x - rising_edge_x, signal_height);
 665
 666                 p.setPen(high_fill_color_);
 667                 p.setBrush(high_fill_color_);
 668                 p.drawRects((const QRectF*)(high_rects.data()), high_rects.size());
 669         }
 670
 671         p.setPen(LogicSignal::EdgeColor);
 672         p.drawLines(edge_lines, edge_count);
 673         delete[] edge_lines;
 674
 675         // Paint the caps
 676         const unsigned int max_cap_line_count = edges.size();
 677         QLineF *const cap_lines = new QLineF[max_cap_line_count];
 678
 679         p.setPen(LogicSignal::HighColor);
 680         paint_logic_caps(p, cap_lines, edges, true, samples_per_pixel,
 681                 pixels_offset, pp.left(), high_offset);
 682         p.setPen(LogicSignal::LowColor);
 683         paint_logic_caps(p, cap_lines, edges, false, samples_per_pixel,
 684                 pixels_offset, pp.left(), low_offset);
 685
 686         delete[] cap_lines;
 687
 688         // Paint the sampling points
 689         if (show_sampling_points) {
 690                 p.setPen(SamplingPointColor);
 691                 p.drawRects(sampling_points.data(), sampling_points.size());
 692         }
 693 }
 694
 695 void AnalogSignal::paint_logic_caps(QPainter &p, QLineF *const lines,
 696         vector< pair<int64_t, bool> > &edges, bool level,
 697         double samples_per_pixel, double pixels_offset, float x_offset,
 698         float y_offset)
 699 {
 700         QLineF *line = lines;
 701
 702         for (auto i = edges.begin(); i != (edges.end() - 1); i++)
 703                 if ((*i).second == level) {
 704                         *line++ = QLineF(
 705                                 ((*i).first / samples_per_pixel -
 706                                         pixels_offset) + x_offset, y_offset,
 707                                 ((*(i+1)).first / samples_per_pixel -
 708                                         pixels_offset) + x_offset, y_offset);
 709                 }
 710
 711         p.drawLines(lines, line - lines);
 712 }
 713
 714 shared_ptr<pv::data::AnalogSegment> AnalogSignal::get_analog_segment_to_paint() const
 715 {
 716         shared_ptr<pv::data::AnalogSegment> segment;
 717
 718         const deque< shared_ptr<pv::data::AnalogSegment> > &segments =
 719                 base_->analog_data()->analog_segments();
 720
 721         if (!segments.empty()) {
 722                 if (segment_display_mode_ == ShowLastSegmentOnly)
 723                         segment = segments.back();
 724
 725                 if ((segment_display_mode_ == ShowSingleSegmentOnly) ||
 726                                 (segment_display_mode_ == ShowLastCompleteSegmentOnly)) {
 727                         try {
 728                                 segment = segments.at(current_segment_);
 729                         } catch (out_of_range&) {
 730                                 qDebug() << "Current analog segment out of range for signal" << base_->name() << ":" << current_segment_;
 731                         }
 732                 }
 733         }
 734
 735         return segment;
 736 }
 737
 738 shared_ptr<pv::data::LogicSegment> AnalogSignal::get_logic_segment_to_paint() const
 739 {
 740         shared_ptr<pv::data::LogicSegment> segment;
 741
 742         const deque< shared_ptr<pv::data::LogicSegment> > &segments =
 743                 base_->logic_data()->logic_segments();
 744
 745         if (!segments.empty()) {
 746                 if (segment_display_mode_ == ShowLastSegmentOnly)
 747                         segment = segments.back();
 748
 749                 if ((segment_display_mode_ == ShowSingleSegmentOnly) ||
 750                                 (segment_display_mode_ == ShowLastCompleteSegmentOnly)) {
 751                         try {
 752                                 segment = segments.at(current_segment_);
 753                         } catch (out_of_range&) {
 754                                 qDebug() << "Current logic segment out of range for signal" << base_->name() << ":" << current_segment_;
 755                         }
 756                 }
 757         }
 758
 759         return segment;
 760 }
 761
 762 float AnalogSignal::get_resolution(int scale_index)
 763 {
 764         const float seq[] = {1.0f, 2.0f, 5.0f};
 765
 766         const int offset = numeric_limits<int>::max() / (2 * countof(seq));
 767         const div_t d = div((int)(scale_index + countof(seq) * offset),
 768                 countof(seq));
 769
 770         return powf(10.0f, d.quot - offset) * seq[d.rem];
 771 }
 772
 773 void AnalogSignal::update_scale()
 774 {
 775         resolution_ = get_resolution(scale_index_);
 776         scale_ = div_height_ / resolution_;
 777 }
 778
 779 void AnalogSignal::update_conversion_widgets()
 780 {
 781         SignalBase::ConversionType conv_type = base_->get_conversion_type();
 782
 783         // Enable or disable widgets depending on conversion state
 784         conv_threshold_cb_->setEnabled(conv_type != SignalBase::NoConversion);
 785         display_type_cb_->setEnabled(conv_type != SignalBase::NoConversion);
 786
 787         conv_threshold_cb_->clear();
 788
 789         vector < pair<QString, int> > presets = base_->get_conversion_presets();
 790
 791         // Prevent the combo box from firing the "edit text changed" signal
 792         // as that would involuntarily select the first entry
 793         conv_threshold_cb_->blockSignals(true);
 794
 795         // Set available options depending on chosen conversion
 796         for (pair<QString, int>& preset : presets)
 797                 conv_threshold_cb_->addItem(preset.first, preset.second);
 798
 799         map < QString, QVariant > options = base_->get_conversion_options();
 800
 801         if (conv_type == SignalBase::A2LConversionByThreshold) {
 802                 const vector<double> thresholds = base_->get_conversion_thresholds(
 803                                 SignalBase::A2LConversionByThreshold, true);
 804                 conv_threshold_cb_->addItem(
 805                                 QString("%1V").arg(QString::number(thresholds[0], 'f', 1)), -1);
 806         }
 807
 808         if (conv_type == SignalBase::A2LConversionBySchmittTrigger) {
 809                 const vector<double> thresholds = base_->get_conversion_thresholds(
 810                                 SignalBase::A2LConversionBySchmittTrigger, true);
 811                 conv_threshold_cb_->addItem(QString("%1V/%2V").arg(
 812                                 QString::number(thresholds[0], 'f', 1),
 813                                 QString::number(thresholds[1], 'f', 1)), -1);
 814         }
 815
 816         int preset_id = base_->get_current_conversion_preset();
 817         conv_threshold_cb_->setCurrentIndex(
 818                         conv_threshold_cb_->findData(preset_id));
 819
 820         conv_threshold_cb_->blockSignals(false);
 821 }
 822
 823 vector<data::LogicSegment::EdgePair> AnalogSignal::get_nearest_level_changes(uint64_t sample_pos)
 824 {
 825         assert(base_);
 826         assert(owner_);
 827
 828         // Return if there's no logic data or we're showing only the analog trace
 829         if (!base_->logic_data() || (display_type_ == DisplayAnalog))
 830                 return vector<data::LogicSegment::EdgePair>();
 831
 832         if (sample_pos == 0)
 833                 return vector<LogicSegment::EdgePair>();
 834
 835         shared_ptr<LogicSegment> segment = get_logic_segment_to_paint();
 836         if (!segment || (segment->get_sample_count() == 0))
 837                 return vector<LogicSegment::EdgePair>();
 838
 839         const View *view = owner_->view();
 840         assert(view);
 841         const double samples_per_pixel = base_->get_samplerate() * view->scale();
 842
 843         vector<LogicSegment::EdgePair> edges;
 844
 845         segment->get_surrounding_edges(edges, sample_pos,
 846                 samples_per_pixel / LogicSignal::Oversampling, 0);
 847
 848         if (edges.empty())
 849                 return vector<LogicSegment::EdgePair>();
 850
 851         return edges;
 852 }
 853
 854 void AnalogSignal::perform_autoranging(bool keep_divs, bool force_update)
 855 {
 856         const deque< shared_ptr<pv::data::AnalogSegment> > &segments =
 857                 base_->analog_data()->analog_segments();
 858
 859         if (segments.empty())
 860                 return;
 861
 862         double min = 0, max = 0;
 863
 864         for (const shared_ptr<pv::data::AnalogSegment>& segment : segments) {
 865                 pair<double, double> mm = segment->get_min_max();
 866                 min = std::min(min, mm.first);
 867                 max = std::max(max, mm.second);
 868         }
 869
 870         if ((min == signal_min_) && (max == signal_max_) && !force_update)
 871                 return;
 872
 873         signal_min_ = min;
 874         signal_max_ = max;
 875
 876         // If we're allowed to alter the div assignment...
 877         if (!keep_divs) {
 878                 // Use all divs for the positive range if there are no negative values
 879                 if ((min == 0) && (neg_vdivs_ > 0)) {
 880                         pos_vdivs_ += neg_vdivs_;
 881                         neg_vdivs_ = 0;
 882                 }
 883
 884                 // Split up the divs if there are negative values but no negative divs
 885                 if ((min < 0) && (neg_vdivs_ == 0)) {
 886                         neg_vdivs_ = pos_vdivs_ / 2;
 887                         pos_vdivs_ -= neg_vdivs_;
 888                 }
 889         }
 890
 891         // If there is still no positive div when we need it, add one
 892         // (this can happen when pos_vdivs==neg_vdivs==0)
 893         if ((max > 0) && (pos_vdivs_ == 0)) {
 894                 pos_vdivs_ = 1;
 895                 owner_->extents_changed(false, true);
 896         }
 897
 898         // If there is still no negative div when we need it, add one
 899         // (this can happen when pos_vdivs was 0 or 1 when trying to split)
 900         if ((min < 0) && (neg_vdivs_ == 0)) {
 901                 neg_vdivs_ = 1;
 902                 owner_->extents_changed(false, true);
 903         }
 904
 905         double min_value_per_div;
 906         if ((pos_vdivs_ > 0) && (neg_vdivs_ >  0))
 907                 min_value_per_div = std::max(max / pos_vdivs_, -min / neg_vdivs_);
 908         else if (pos_vdivs_ > 0)
 909                 min_value_per_div = max / pos_vdivs_;
 910         else
 911                 min_value_per_div = -min / neg_vdivs_;
 912
 913         // Find first scale value that is bigger than the value we need
 914         for (int i = MinScaleIndex; i < MaxScaleIndex; i++)
 915                 if (get_resolution(i) > min_value_per_div) {
 916                         scale_index_ = i;
 917                         break;
 918                 }
 919
 920         update_scale();
 921 }
 922
 923 void AnalogSignal::reset_pixel_values()
 924 {
 925         value_at_pixel_pos_.clear();
 926         current_pixel_pos_ = -1;
 927         prev_value_at_pixel_ = std::numeric_limits<float>::quiet_NaN();
 928 }
 929
 930 void AnalogSignal::process_next_sample_value(float x, float value)
 931 {
 932         // Note: NAN is used to indicate the non-existance of a value at this pixel
 933
 934         if (std::isnan(prev_value_at_pixel_)) {
 935                 if (x < 0) {
 936                         min_value_at_pixel_ = value;
 937                         max_value_at_pixel_ = value;
 938                         prev_value_at_pixel_ = value;
 939                         current_pixel_pos_ = x;
 940                 } else
 941                         prev_value_at_pixel_ = std::numeric_limits<float>::quiet_NaN();
 942         }
 943
 944         const int pixel_pos = (int)(x + 0.5);
 945
 946         if (pixel_pos > current_pixel_pos_) {
 947                 if (pixel_pos - current_pixel_pos_ == 1) {
 948                         if (std::isnan(prev_value_at_pixel_)) {
 949                                 value_at_pixel_pos_.push_back(prev_value_at_pixel_);
 950                         } else {
 951                                 // Average the min/max range to create one value for the previous pixel
 952                                 const float avg = (min_value_at_pixel_ + max_value_at_pixel_) / 2;
 953                                 value_at_pixel_pos_.push_back(avg);
 954                         }
 955                 } else {
 956                         // Interpolate values to create values for the intermediate pixels
 957                         const float start_value = prev_value_at_pixel_;
 958                         const float end_value = value;
 959                         const int steps = fabs(pixel_pos - current_pixel_pos_);
 960                         const double gradient = (end_value - start_value) / steps;
 961                         for (int i = 0; i < steps; i++) {
 962                                 if (current_pixel_pos_ + i < 0)
 963                                         continue;
 964                                 value_at_pixel_pos_.push_back(start_value + i * gradient);
 965                         }
 966                 }
 967
 968                 min_value_at_pixel_ = value;
 969                 max_value_at_pixel_ = value;
 970                 prev_value_at_pixel_ = value;
 971                 current_pixel_pos_ = pixel_pos;
 972         } else {
 973                 // Another sample for the same pixel
 974                 if (value < min_value_at_pixel_)
 975                         min_value_at_pixel_ = value;
 976                 if (value > max_value_at_pixel_)
 977                         max_value_at_pixel_ = value;
 978         }
 979 }
 980
 981 void AnalogSignal::populate_popup_form(QWidget *parent, QFormLayout *form)
 982 {
 983         // Add the standard options
 984         Signal::populate_popup_form(parent, form);
 985
 986         QFormLayout *const layout = new QFormLayout;
 987
 988         // Add div-related settings
 989         pvdiv_sb_ = new QSpinBox(parent);
 990         pvdiv_sb_->setRange(0, MaximumVDivs);
 991         pvdiv_sb_->setValue(pos_vdivs_);
 992         connect(pvdiv_sb_, SIGNAL(valueChanged(int)),
 993                 this, SLOT(on_pos_vdivs_changed(int)));
 994         layout->addRow(tr("Number of pos vertical divs"), pvdiv_sb_);
 995
 996         nvdiv_sb_ = new QSpinBox(parent);
 997         nvdiv_sb_->setRange(0, MaximumVDivs);
 998         nvdiv_sb_->setValue(neg_vdivs_);
 999         connect(nvdiv_sb_, SIGNAL(valueChanged(int)),
1000                 this, SLOT(on_neg_vdivs_changed(int)));
1001         layout->addRow(tr("Number of neg vertical divs"), nvdiv_sb_);
1002
1003         div_height_sb_ = new QSpinBox(parent);
1004         div_height_sb_->setRange(20, 1000);
1005         div_height_sb_->setSingleStep(5);
1006         div_height_sb_->setSuffix(tr(" pixels"));
1007         div_height_sb_->setValue(div_height_);
1008         connect(div_height_sb_, SIGNAL(valueChanged(int)),
1009                 this, SLOT(on_div_height_changed(int)));
1010         layout->addRow(tr("Div height"), div_height_sb_);
1011
1012         // Add the vertical resolution
1013         resolution_cb_ = new QComboBox(parent);
1014
1015         for (int i = MinScaleIndex; i < MaxScaleIndex; i++) {
1016                 const QString label = QString("%1").arg(get_resolution(i));
1017                 resolution_cb_->insertItem(0, label, QVariant(i));
1018         }
1019
1020         int cur_idx = resolution_cb_->findData(QVariant(scale_index_));
1021         resolution_cb_->setCurrentIndex(cur_idx);
1022
1023         connect(resolution_cb_, SIGNAL(currentIndexChanged(int)),
1024                 this, SLOT(on_resolution_changed(int)));
1025
1026         QGridLayout *const vdiv_layout = new QGridLayout;
1027         QLabel *const vdiv_unit = new QLabel(tr("V/div"));
1028         vdiv_layout->addWidget(resolution_cb_, 0, 0);
1029         vdiv_layout->addWidget(vdiv_unit, 0, 1);
1030
1031         layout->addRow(tr("Vertical resolution"), vdiv_layout);
1032
1033         // Add the autoranging checkbox
1034         QCheckBox* autoranging_cb = new QCheckBox();
1035         autoranging_cb->setCheckState(autoranging_ ? Qt::Checked : Qt::Unchecked);
1036
1037         connect(autoranging_cb, SIGNAL(stateChanged(int)),
1038                 this, SLOT(on_autoranging_changed(int)));
1039
1040         layout->addRow(tr("Autoranging"), autoranging_cb);
1041
1042         // Add the conversion type dropdown
1043         conversion_cb_ = new QComboBox();
1044
1045         conversion_cb_->addItem(tr("none"),
1046                 SignalBase::NoConversion);
1047         conversion_cb_->addItem(tr("to logic via threshold"),
1048                 SignalBase::A2LConversionByThreshold);
1049         conversion_cb_->addItem(tr("to logic via schmitt-trigger"),
1050                 SignalBase::A2LConversionBySchmittTrigger);
1051
1052         cur_idx = conversion_cb_->findData(QVariant(base_->get_conversion_type()));
1053         conversion_cb_->setCurrentIndex(cur_idx);
1054
1055         layout->addRow(tr("Conversion"), conversion_cb_);
1056
1057         connect(conversion_cb_, SIGNAL(currentIndexChanged(int)),
1058                 this, SLOT(on_conversion_changed(int)));
1059
1060     // Add the conversion threshold settings
1061     conv_threshold_cb_ = new QComboBox();
1062     conv_threshold_cb_->setEditable(true);
1063
1064     layout->addRow(tr("Conversion threshold(s)"), conv_threshold_cb_);
1065
1066     connect(conv_threshold_cb_, SIGNAL(currentIndexChanged(int)),
1067             this, SLOT(on_conv_threshold_changed(int)));
1068     connect(conv_threshold_cb_, SIGNAL(editTextChanged(const QString&)),
1069             this, SLOT(on_conv_threshold_changed()));  // index will be -1
1070
1071         // Add the display type dropdown
1072         display_type_cb_ = new QComboBox();
1073
1074         display_type_cb_->addItem(tr("analog"), DisplayAnalog);
1075         display_type_cb_->addItem(tr("converted"), DisplayConverted);
1076         display_type_cb_->addItem(tr("analog+converted"), DisplayBoth);
1077
1078         cur_idx = display_type_cb_->findData(QVariant(display_type_));
1079         display_type_cb_->setCurrentIndex(cur_idx);
1080
1081         layout->addRow(tr("Show traces for"), display_type_cb_);
1082
1083         connect(display_type_cb_, SIGNAL(currentIndexChanged(int)),
1084                 this, SLOT(on_display_type_changed(int)));
1085
1086         // Update the conversion widget contents and states
1087         update_conversion_widgets();
1088
1089         form->addRow(layout);
1090 }
1091
1092 void AnalogSignal::hover_point_changed(const QPoint &hp)
1093 {
1094         Signal::hover_point_changed(hp);
1095
1096         // Note: Even though the view area begins at 0, we exclude 0 because
1097         // that's also the value given when the cursor is over the header to the
1098         // left of the trace paint area
1099         if (hp.x() <= 0) {
1100                 value_at_hover_pos_ = std::numeric_limits<float>::quiet_NaN();
1101         } else {
1102                 if ((size_t)hp.x() < value_at_pixel_pos_.size())
1103                         value_at_hover_pos_ = value_at_pixel_pos_.at(hp.x());
1104                 else
1105                         value_at_hover_pos_ = std::numeric_limits<float>::quiet_NaN();
1106         }
1107 }
1108
1109 void AnalogSignal::on_setting_changed(const QString &key, const QVariant &value)
1110 {
1111         Signal::on_setting_changed(key, value);
1112
1113         if (key == GlobalSettings::Key_View_ShowSamplingPoints)
1114                 show_sampling_points_ = value.toBool();
1115
1116         if (key == GlobalSettings::Key_View_FillSignalHighAreas)
1117                 fill_high_areas_ = value.toBool();
1118
1119         if (key == GlobalSettings::Key_View_FillSignalHighAreaColor)
1120                 high_fill_color_ = QColor::fromRgba(value.value<uint32_t>());
1121
1122         if (key == GlobalSettings::Key_View_ShowAnalogMinorGrid)
1123                 show_analog_minor_grid_ = value.toBool();
1124
1125         if (key == GlobalSettings::Key_View_ConversionThresholdDispMode) {
1126                 conversion_threshold_disp_mode_ = value.toInt();
1127
1128                 if (owner_)
1129                         owner_->row_item_appearance_changed(false, true);
1130         }
1131 }
1132
1133 void AnalogSignal::on_min_max_changed(float min, float max)
1134 {
1135         if (autoranging_)
1136                 perform_autoranging(false, false);
1137         else {
1138                 if (min < signal_min_) signal_min_ = min;
1139                 if (max > signal_max_) signal_max_ = max;
1140         }
1141 }
1142
1143 void AnalogSignal::on_pos_vdivs_changed(int vdivs)
1144 {
1145         if (vdivs == pos_vdivs_)
1146                 return;
1147
1148         pos_vdivs_ = vdivs;
1149
1150         // There has to be at least one div, positive or negative
1151         if ((neg_vdivs_ == 0) && (pos_vdivs_ == 0)) {
1152                 pos_vdivs_ = 1;
1153                 if (pvdiv_sb_)
1154                         pvdiv_sb_->setValue(pos_vdivs_);
1155         }
1156
1157         if (autoranging_) {
1158                 perform_autoranging(true, true);
1159
1160                 // It could be that a positive or negative div was added, so update
1161                 if (pvdiv_sb_) {
1162                         pvdiv_sb_->setValue(pos_vdivs_);
1163                         nvdiv_sb_->setValue(neg_vdivs_);
1164                 }
1165         }
1166
1167         if (owner_) {
1168                 // Call order is important, otherwise the lazy event handler won't work
1169                 owner_->extents_changed(false, true);
1170                 owner_->row_item_appearance_changed(false, true);
1171         }
1172 }
1173
1174 void AnalogSignal::on_neg_vdivs_changed(int vdivs)
1175 {
1176         if (vdivs == neg_vdivs_)
1177                 return;
1178
1179         neg_vdivs_ = vdivs;
1180
1181         // There has to be at least one div, positive or negative
1182         if ((neg_vdivs_ == 0) && (pos_vdivs_ == 0)) {
1183                 pos_vdivs_ = 1;
1184                 if (pvdiv_sb_)
1185                         pvdiv_sb_->setValue(pos_vdivs_);
1186         }
1187
1188         if (autoranging_) {
1189                 perform_autoranging(true, true);
1190
1191                 // It could be that a positive or negative div was added, so update
1192                 if (pvdiv_sb_) {
1193                         pvdiv_sb_->setValue(pos_vdivs_);
1194                         nvdiv_sb_->setValue(neg_vdivs_);
1195                 }
1196         }
1197
1198         if (owner_) {
1199                 // Call order is important, otherwise the lazy event handler won't work
1200                 owner_->extents_changed(false, true);
1201                 owner_->row_item_appearance_changed(false, true);
1202         }
1203 }
1204
1205 void AnalogSignal::on_div_height_changed(int height)
1206 {
1207         div_height_ = height;
1208         update_scale();
1209
1210         if (owner_) {
1211                 // Call order is important, otherwise the lazy event handler won't work
1212                 owner_->extents_changed(false, true);
1213                 owner_->row_item_appearance_changed(false, true);
1214         }
1215 }
1216
1217 void AnalogSignal::on_resolution_changed(int index)
1218 {
1219         scale_index_ = resolution_cb_->itemData(index).toInt();
1220         update_scale();
1221
1222         if (owner_)
1223                 owner_->row_item_appearance_changed(false, true);
1224 }
1225
1226 void AnalogSignal::on_autoranging_changed(int state)
1227 {
1228         autoranging_ = (state == Qt::Checked);
1229
1230         if (autoranging_)
1231                 perform_autoranging(false, true);
1232
1233         if (owner_) {
1234                 // Call order is important, otherwise the lazy event handler won't work
1235                 owner_->extents_changed(false, true);
1236                 owner_->row_item_appearance_changed(false, true);
1237         }
1238 }
1239
1240 void AnalogSignal::on_conversion_changed(int index)
1241 {
1242         SignalBase::ConversionType old_conv_type = base_->get_conversion_type();
1243
1244         SignalBase::ConversionType conv_type =
1245                 (SignalBase::ConversionType)(conversion_cb_->itemData(index).toInt());
1246
1247         if (conv_type != old_conv_type) {
1248                 base_->set_conversion_type(conv_type);
1249                 update_conversion_widgets();
1250
1251                 if (owner_)
1252                         owner_->row_item_appearance_changed(false, true);
1253         }
1254 }
1255
1256 void AnalogSignal::on_conv_threshold_changed(int index)
1257 {
1258         SignalBase::ConversionType conv_type = base_->get_conversion_type();
1259
1260         // Note: index is set to -1 if the text in the combo box matches none of
1261         // the entries in the combo box
1262
1263         if ((index == -1) && (conv_threshold_cb_->currentText().length() == 0))
1264                 return;
1265
1266         // The combo box entry with the custom value has user_data set to -1
1267         const int user_data = conv_threshold_cb_->findText(
1268                         conv_threshold_cb_->currentText());
1269
1270         const bool use_custom_thr = (index == -1) || (user_data == -1);
1271
1272         if (conv_type == SignalBase::A2LConversionByThreshold && use_custom_thr) {
1273                 // Not one of the preset values, try to parse the combo box text
1274                 // Note: Regex loosely based on
1275                 // https://txt2re.com/index-c++.php3?s=0.1V&1&-13
1276                 QString re1 = "([+-]?\\d*[\\.,]?\\d*)"; // Float value
1277                 QString re2 = "([a-zA-Z]*)"; // SI unit
1278                 QRegExp regex(re1 + re2);
1279
1280                 const QString text = conv_threshold_cb_->currentText();
1281                 if (!regex.exactMatch(text))
1282                         return;  // String doesn't match the regex
1283
1284                 QStringList tokens = regex.capturedTexts();
1285
1286                 // For now, we simply assume that the unit is volt without modifiers
1287                 const double thr = tokens.at(1).toDouble();
1288
1289                 // Only restart the conversion if the threshold was updated.
1290                 // We're starting a delayed conversion because the user may still be
1291                 // typing and the UI would lag if we kept on restarting it immediately
1292                 if (base_->set_conversion_option("threshold_value", thr))
1293                         base_->start_conversion(true);
1294         }
1295
1296         if (conv_type == SignalBase::A2LConversionBySchmittTrigger && use_custom_thr) {
1297                 // Not one of the preset values, try to parse the combo box text
1298                 // Note: Regex loosely based on
1299                 // https://txt2re.com/index-c++.php3?s=0.1V/0.2V&2&14&-22&3&15
1300                 QString re1 = "([+-]?\\d*[\\.,]?\\d*)"; // Float value
1301                 QString re2 = "([a-zA-Z]*)"; // SI unit
1302                 QString re3 = "\\/"; // Forward slash, not captured
1303                 QString re4 = "([+-]?\\d*[\\.,]?\\d*)"; // Float value
1304                 QString re5 = "([a-zA-Z]*)"; // SI unit
1305                 QRegExp regex(re1 + re2 + re3 + re4 + re5);
1306
1307                 const QString text = conv_threshold_cb_->currentText();
1308                 if (!regex.exactMatch(text))
1309                         return;  // String doesn't match the regex
1310
1311                 QStringList tokens = regex.capturedTexts();
1312
1313                 // For now, we simply assume that the unit is volt without modifiers
1314                 const double low_thr = tokens.at(1).toDouble();
1315                 const double high_thr = tokens.at(3).toDouble();
1316
1317                 // Only restart the conversion if one of the options was updated.
1318                 // We're starting a delayed conversion because the user may still be
1319                 // typing and the UI would lag if we kept on restarting it immediately
1320                 bool o1 = base_->set_conversion_option("threshold_value_low", low_thr);
1321                 bool o2 = base_->set_conversion_option("threshold_value_high", high_thr);
1322                 if (o1 || o2)
1323                         base_->start_conversion(true);  // Start delayed conversion
1324         }
1325
1326         base_->set_conversion_preset((SignalBase::ConversionPreset)index);
1327
1328         // Immediately start the conversion if we're not using custom values
1329         // (i.e. we're using one of the presets)
1330         if (!use_custom_thr)
1331                 base_->start_conversion();
1332 }
1333
1334 void AnalogSignal::on_delayed_conversion_starter()
1335 {
1336         base_->start_conversion();
1337 }
1338
1339 void AnalogSignal::on_display_type_changed(int index)
1340 {
1341         display_type_ = (DisplayType)(display_type_cb_->itemData(index).toInt());
1342
1343         if (owner_)
1344                 owner_->row_item_appearance_changed(false, true);
1345 }
1346
1347 } // namespace trace
1348 } // namespace views
1349 } // namespace pv