pv/views/trace/analogsignal.cpp

   1 /*
   2  * This file is part of the PulseView project.
   3  *
   4  * Copyright (C) 2012 Joel Holdsworth <joel@airwebreathe.org.uk>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 #include <extdef.h>
  21
  22 #include <cassert>
  23 #include <cmath>
  24 #include <cstdlib>
  25 #include <limits>
  26 #include <vector>
  27
  28 #include <QApplication>
  29 #include <QCheckBox>
  30 #include <QComboBox>
  31 #include <QDebug>
  32 #include <QFormLayout>
  33 #include <QGridLayout>
  34 #include <QLabel>
  35 #include <QString>
  36
  37 #include "analogsignal.hpp"
  38 #include "logicsignal.hpp"
  39 #include "view.hpp"
  40
  41 #include "pv/util.hpp"
  42 #include "pv/data/analog.hpp"
  43 #include "pv/data/analogsegment.hpp"
  44 #include "pv/data/logic.hpp"
  45 #include "pv/data/logicsegment.hpp"
  46 #include "pv/data/signalbase.hpp"
  47 #include "pv/globalsettings.hpp"
  48
  49 #include <libsigrokcxx/libsigrokcxx.hpp>
  50
  51 using std::deque;
  52 using std::div;
  53 using std::div_t;
  54 // Note that "using std::isnan;" is _not_ put here since that would break
  55 // compilation on some platforms. Use "std::isnan()" instead in checks below.
  56 using std::max;
  57 using std::make_pair;
  58 using std::min;
  59 using std::numeric_limits;
  60 using std::out_of_range;
  61 using std::pair;
  62 using std::shared_ptr;
  63 using std::vector;
  64
  65 using pv::data::SignalBase;
  66 using pv::util::SIPrefix;
  67
  68 namespace pv {
  69 namespace views {
  70 namespace trace {
  71
  72 const QColor AnalogSignal::SignalColors[4] = {
  73         QColor(0xC4, 0xA0, 0x00),       // Yellow
  74         QColor(0x87, 0x20, 0x7A),       // Magenta
  75         QColor(0x20, 0x4A, 0x87),       // Blue
  76         QColor(0x4E, 0x9A, 0x06)        // Green
  77 };
  78
  79 const QPen AnalogSignal::AxisPen(QColor(0, 0, 0, 30 * 256 / 100), 2);
  80 const QColor AnalogSignal::GridMajorColor = QColor(0, 0, 0, 40 * 256 / 100);
  81 const QColor AnalogSignal::GridMinorColor = QColor(0, 0, 0, 20 * 256 / 100);
  82
  83 const QColor AnalogSignal::SamplingPointColor(0x77, 0x77, 0x77);
  84 const QColor AnalogSignal::SamplingPointColorLo = QColor(200, 0, 0, 80 * 256 / 100);
  85 const QColor AnalogSignal::SamplingPointColorNe = QColor(0,   0, 0, 80 * 256 / 100);
  86 const QColor AnalogSignal::SamplingPointColorHi = QColor(0, 200, 0, 80 * 256 / 100);
  87
  88 const QColor AnalogSignal::ThresholdColor = QColor(0, 0, 0, 30 * 256 / 100);
  89 const QColor AnalogSignal::ThresholdColorLo = QColor(255, 0, 0, 8 * 256 / 100);
  90 const QColor AnalogSignal::ThresholdColorNe = QColor(0,   0, 0, 10 * 256 / 100);
  91 const QColor AnalogSignal::ThresholdColorHi = QColor(0, 255, 0, 8 * 256 / 100);
  92
  93 const int64_t AnalogSignal::TracePaintBlockSize = 1024 * 1024;  // 4 MiB (due to float)
  94 const float AnalogSignal::EnvelopeThreshold = 64.0f;
  95
  96 const int AnalogSignal::MaximumVDivs = 10;
  97 const int AnalogSignal::MinScaleIndex = -6;
  98 const int AnalogSignal::MaxScaleIndex = 7;
  99
 100 const int AnalogSignal::InfoTextMarginRight = 20;
 101 const int AnalogSignal::InfoTextMarginBottom = 5;
 102
 103 AnalogSignal::AnalogSignal(
 104         pv::Session &session,
 105         shared_ptr<data::SignalBase> base) :
 106         Signal(session, base),
 107         scale_index_(4), // 20 per div
 108         pos_vdivs_(1),
 109         neg_vdivs_(1),
 110         resolution_(0),
 111         display_type_(DisplayBoth),
 112         autoranging_(true)
 113 {
 114         axis_pen_ = AxisPen;
 115
 116         pv::data::Analog* analog_data =
 117                 dynamic_cast<pv::data::Analog*>(data().get());
 118
 119         connect(analog_data, SIGNAL(min_max_changed(float, float)),
 120                 this, SLOT(on_min_max_changed(float, float)));
 121
 122         GlobalSettings gs;
 123         conversion_threshold_disp_mode_ =
 124                 gs.value(GlobalSettings::Key_View_ConversionThresholdDispMode).toInt();
 125
 126         div_height_ = gs.value(GlobalSettings::Key_View_DefaultDivHeight).toInt();
 127
 128         base_->set_color(SignalColors[base_->index() % countof(SignalColors)]);
 129         update_scale();
 130 }
 131
 132 shared_ptr<pv::data::SignalData> AnalogSignal::data() const
 133 {
 134         return base_->analog_data();
 135 }
 136
 137 void AnalogSignal::save_settings(QSettings &settings) const
 138 {
 139         settings.setValue("pos_vdivs", pos_vdivs_);
 140         settings.setValue("neg_vdivs", neg_vdivs_);
 141         settings.setValue("scale_index", scale_index_);
 142         settings.setValue("display_type", display_type_);
 143         settings.setValue("autoranging", autoranging_);
 144         settings.setValue("div_height", div_height_);
 145 }
 146
 147 void AnalogSignal::restore_settings(QSettings &settings)
 148 {
 149         if (settings.contains("pos_vdivs"))
 150                 pos_vdivs_ = settings.value("pos_vdivs").toInt();
 151
 152         if (settings.contains("neg_vdivs"))
 153                 neg_vdivs_ = settings.value("neg_vdivs").toInt();
 154
 155         if (settings.contains("scale_index")) {
 156                 scale_index_ = settings.value("scale_index").toInt();
 157                 update_scale();
 158         }
 159
 160         if (settings.contains("display_type"))
 161                 display_type_ = (DisplayType)(settings.value("display_type").toInt());
 162
 163         if (settings.contains("autoranging"))
 164                 autoranging_ = settings.value("autoranging").toBool();
 165
 166         if (settings.contains("div_height")) {
 167                 const int old_height = div_height_;
 168                 div_height_ = settings.value("div_height").toInt();
 169
 170                 if ((div_height_ != old_height) && owner_) {
 171                         // Call order is important, otherwise the lazy event handler won't work
 172                         owner_->extents_changed(false, true);
 173                         owner_->row_item_appearance_changed(false, true);
 174                 }
 175         }
 176 }
 177
 178 pair<int, int> AnalogSignal::v_extents() const
 179 {
 180         const int ph = pos_vdivs_ * div_height_;
 181         const int nh = neg_vdivs_ * div_height_;
 182         return make_pair(-ph, nh);
 183 }
 184
 185 void AnalogSignal::on_setting_changed(const QString &key, const QVariant &value)
 186 {
 187         Signal::on_setting_changed(key, value);
 188
 189         if (key == GlobalSettings::Key_View_ConversionThresholdDispMode)
 190                 on_settingViewConversionThresholdDispMode_changed(value);
 191 }
 192
 193 void AnalogSignal::paint_back(QPainter &p, ViewItemPaintParams &pp)
 194 {
 195         if (!base_->enabled())
 196                 return;
 197
 198         bool paint_thr_bg =
 199                 conversion_threshold_disp_mode_ == GlobalSettings::ConvThrDispMode_Background;
 200
 201         const vector<double> thresholds = base_->get_conversion_thresholds();
 202
 203         // Only display thresholds if we have some and we show analog samples
 204         if ((thresholds.size() > 0) && paint_thr_bg &&
 205                 ((display_type_ == DisplayAnalog) || (display_type_ == DisplayBoth))) {
 206
 207                 const int visual_y = get_visual_y();
 208                 const pair<int, int> extents = v_extents();
 209                 const int top = visual_y + extents.first;
 210                 const int btm = visual_y + extents.second;
 211
 212                 // Draw high/neutral/low areas
 213                 if (thresholds.size() == 2) {
 214                         int thr_lo = visual_y - thresholds[0] * scale_;
 215                         int thr_hi = visual_y - thresholds[1] * scale_;
 216                         thr_lo = min(max(thr_lo, top), btm);
 217                         thr_hi = min(max(thr_hi, top), btm);
 218
 219                         p.fillRect(QRectF(pp.left(), top, pp.width(), thr_hi - top),
 220                                 QBrush(ThresholdColorHi));
 221                         p.fillRect(QRectF(pp.left(), thr_hi, pp.width(), thr_lo - thr_hi),
 222                                 QBrush(ThresholdColorNe));
 223                         p.fillRect(QRectF(pp.left(), thr_lo, pp.width(), btm - thr_lo),
 224                                 QBrush(ThresholdColorLo));
 225                 } else {
 226                         int thr = visual_y - thresholds[0] * scale_;
 227                         thr = min(max(thr, top), btm);
 228
 229                         p.fillRect(QRectF(pp.left(), top, pp.width(), thr - top),
 230                                 QBrush(ThresholdColorHi));
 231                         p.fillRect(QRectF(pp.left(), thr, pp.width(), btm - thr),
 232                                 QBrush(ThresholdColorLo));
 233                 }
 234
 235                 paint_axis(p, pp, get_visual_y());
 236         } else {
 237                 Trace::paint_back(p, pp);
 238                 paint_axis(p, pp, get_visual_y());
 239         }
 240 }
 241
 242 void AnalogSignal::paint_mid(QPainter &p, ViewItemPaintParams &pp)
 243 {
 244         assert(base_->analog_data());
 245         assert(owner_);
 246
 247         const int y = get_visual_y();
 248
 249         if (!base_->enabled())
 250                 return;
 251
 252         if ((display_type_ == DisplayAnalog) || (display_type_ == DisplayBoth)) {
 253                 paint_grid(p, y, pp.left(), pp.right());
 254
 255                 shared_ptr<pv::data::AnalogSegment> segment = get_analog_segment_to_paint();
 256                 if (!segment || (segment->get_sample_count() == 0))
 257                         return;
 258
 259                 const double pixels_offset = pp.pixels_offset();
 260                 const double samplerate = max(1.0, segment->samplerate());
 261                 const pv::util::Timestamp& start_time = segment->start_time();
 262                 const int64_t last_sample = (int64_t)segment->get_sample_count() - 1;
 263                 const double samples_per_pixel = samplerate * pp.scale();
 264                 const pv::util::Timestamp start = samplerate * (pp.offset() - start_time);
 265                 const pv::util::Timestamp end = start + samples_per_pixel * pp.width();
 266
 267                 const int64_t start_sample = min(max(floor(start).convert_to<int64_t>(),
 268                         (int64_t)0), last_sample);
 269                 const int64_t end_sample = min(max((ceil(end) + 1).convert_to<int64_t>(),
 270                         (int64_t)0), last_sample);
 271
 272                 if (samples_per_pixel < EnvelopeThreshold)
 273                         paint_trace(p, segment, y, pp.left(), start_sample, end_sample,
 274                                 pixels_offset, samples_per_pixel);
 275                 else
 276                         paint_envelope(p, segment, y, pp.left(), start_sample, end_sample,
 277                                 pixels_offset, samples_per_pixel);
 278         }
 279
 280         if ((display_type_ == DisplayConverted) || (display_type_ == DisplayBoth))
 281                 paint_logic_mid(p, pp);
 282 }
 283
 284 void AnalogSignal::paint_fore(QPainter &p, ViewItemPaintParams &pp)
 285 {
 286         if (!enabled())
 287                 return;
 288
 289         if ((display_type_ == DisplayAnalog) || (display_type_ == DisplayBoth)) {
 290                 const int y = get_visual_y();
 291
 292                 QString infotext;
 293
 294                 // Show the info section on the right side of the trace, including
 295                 // the value at the hover point when the hover marker is enabled
 296                 // and we have corresponding data available
 297                 if (show_hover_marker_ && !std::isnan(value_at_hover_pos_)) {
 298                         infotext = QString("[%1] %2 V/div")
 299                                 .arg(format_value_si(value_at_hover_pos_, SIPrefix::unspecified, 0, "V", false))
 300                                 .arg(resolution_);
 301                 } else
 302                         infotext = QString("%1 V/div").arg(resolution_);
 303
 304                 p.setPen(base_->color());
 305                 p.setFont(QApplication::font());
 306
 307                 const QRectF bounding_rect = QRectF(pp.left(),
 308                                 y + v_extents().first,
 309                                 pp.width() - InfoTextMarginRight,
 310                                 v_extents().second - v_extents().first - InfoTextMarginBottom);
 311
 312                 p.drawText(bounding_rect, Qt::AlignRight | Qt::AlignBottom, infotext);
 313         }
 314
 315         if (show_hover_marker_)
 316                 paint_hover_marker(p);
 317 }
 318
 319 void AnalogSignal::paint_grid(QPainter &p, int y, int left, int right)
 320 {
 321         p.setRenderHint(QPainter::Antialiasing, false);
 322
 323         GlobalSettings settings;
 324         const bool show_analog_minor_grid =
 325                 settings.value(GlobalSettings::Key_View_ShowAnalogMinorGrid).toBool();
 326
 327         if (pos_vdivs_ > 0) {
 328                 p.setPen(QPen(GridMajorColor, 1, Qt::DashLine));
 329                 for (int i = 1; i <= pos_vdivs_; i++) {
 330                         const float dy = i * div_height_;
 331                         p.drawLine(QLineF(left, y - dy, right, y - dy));
 332                 }
 333         }
 334
 335         if ((pos_vdivs_ > 0) && show_analog_minor_grid) {
 336                 p.setPen(QPen(GridMinorColor, 1, Qt::DashLine));
 337                 for (int i = 0; i < pos_vdivs_; i++) {
 338                         const float dy = i * div_height_;
 339                         const float dy25 = dy + (0.25 * div_height_);
 340                         const float dy50 = dy + (0.50 * div_height_);
 341                         const float dy75 = dy + (0.75 * div_height_);
 342                         p.drawLine(QLineF(left, y - dy25, right, y - dy25));
 343                         p.drawLine(QLineF(left, y - dy50, right, y - dy50));
 344                         p.drawLine(QLineF(left, y - dy75, right, y - dy75));
 345                 }
 346         }
 347
 348         if (neg_vdivs_ > 0) {
 349                 p.setPen(QPen(GridMajorColor, 1, Qt::DashLine));
 350                 for (int i = 1; i <= neg_vdivs_; i++) {
 351                         const float dy = i * div_height_;
 352                         p.drawLine(QLineF(left, y + dy, right, y + dy));
 353                 }
 354         }
 355
 356         if ((pos_vdivs_ > 0) && show_analog_minor_grid) {
 357                 p.setPen(QPen(GridMinorColor, 1, Qt::DashLine));
 358                 for (int i = 0; i < neg_vdivs_; i++) {
 359                         const float dy = i * div_height_;
 360                         const float dy25 = dy + (0.25 * div_height_);
 361                         const float dy50 = dy + (0.50 * div_height_);
 362                         const float dy75 = dy + (0.75 * div_height_);
 363                         p.drawLine(QLineF(left, y + dy25, right, y + dy25));
 364                         p.drawLine(QLineF(left, y + dy50, right, y + dy50));
 365                         p.drawLine(QLineF(left, y + dy75, right, y + dy75));
 366                 }
 367         }
 368
 369         p.setRenderHint(QPainter::Antialiasing, true);
 370 }
 371
 372 void AnalogSignal::paint_trace(QPainter &p,
 373         const shared_ptr<pv::data::AnalogSegment> &segment,
 374         int y, int left, const int64_t start, const int64_t end,
 375         const double pixels_offset, const double samples_per_pixel)
 376 {
 377         if (end <= start)
 378                 return;
 379
 380         bool paint_thr_dots =
 381                 (base_->get_conversion_type() != data::SignalBase::NoConversion) &&
 382                 (conversion_threshold_disp_mode_ == GlobalSettings::ConvThrDispMode_Dots);
 383
 384         vector<double> thresholds;
 385         if (paint_thr_dots)
 386                 thresholds = base_->get_conversion_thresholds();
 387
 388         // Calculate and paint the sampling points if enabled and useful
 389         GlobalSettings settings;
 390         const bool show_sampling_points =
 391                 (settings.value(GlobalSettings::Key_View_ShowSamplingPoints).toBool() ||
 392                 paint_thr_dots) && (samples_per_pixel < 0.25);
 393
 394         p.setPen(base_->color());
 395
 396         const int64_t points_count = end - start + 1;
 397
 398         QPointF *points = new QPointF[points_count];
 399         QPointF *point = points;
 400
 401         vector<QRectF> sampling_points[3];
 402
 403         int64_t sample_count = min(points_count, TracePaintBlockSize);
 404         int64_t block_sample = 0;
 405         float *sample_block = new float[TracePaintBlockSize];
 406         segment->get_samples(start, start + sample_count, sample_block);
 407
 408         if (show_hover_marker_)
 409                 reset_pixel_values();
 410
 411         const int w = 2;
 412         for (int64_t sample = start; sample <= end; sample++, block_sample++) {
 413
 414                 // Fetch next block of samples if we finished the current one
 415                 if (block_sample == TracePaintBlockSize) {
 416                         block_sample = 0;
 417                         sample_count = min(points_count - sample, TracePaintBlockSize);
 418                         segment->get_samples(sample, sample + sample_count, sample_block);
 419                 }
 420
 421                 const float abs_x = sample / samples_per_pixel - pixels_offset;
 422                 const float x = left + abs_x;
 423
 424                 *point++ = QPointF(x, y - sample_block[block_sample] * scale_);
 425
 426                 // Generate the pixel<->value lookup table for the mouse hover
 427                 if (show_hover_marker_)
 428                         process_next_sample_value(abs_x, sample_block[block_sample]);
 429
 430                 // Create the sampling points if needed
 431                 if (show_sampling_points) {
 432                         int idx = 0;  // Neutral
 433
 434                         if (paint_thr_dots) {
 435                                 if (thresholds.size() == 1)
 436                                         idx = (sample_block[block_sample] >= thresholds[0]) ? 2 : 1;
 437                                 else if (thresholds.size() == 2) {
 438                                         if (sample_block[block_sample] > thresholds[1])
 439                                                 idx = 2;  // High
 440                                         else if (sample_block[block_sample] < thresholds[0])
 441                                                 idx = 1;  // Low
 442                                 }
 443                         }
 444
 445                         sampling_points[idx].emplace_back(x - (w / 2), y - sample_block[block_sample] * scale_ - (w / 2), w, w);
 446                 }
 447         }
 448         delete[] sample_block;
 449
 450         p.drawPolyline(points, points_count);
 451
 452         if (show_sampling_points) {
 453                 if (paint_thr_dots) {
 454                         p.setPen(SamplingPointColorNe);
 455                         p.drawRects(sampling_points[0].data(), sampling_points[0].size());
 456                         p.setPen(SamplingPointColorLo);
 457                         p.drawRects(sampling_points[1].data(), sampling_points[1].size());
 458                         p.setPen(SamplingPointColorHi);
 459                         p.drawRects(sampling_points[2].data(), sampling_points[2].size());
 460                 } else {
 461                         p.setPen(SamplingPointColor);
 462                         p.drawRects(sampling_points[0].data(), sampling_points[0].size());
 463                 }
 464         }
 465
 466         delete[] points;
 467 }
 468
 469 void AnalogSignal::paint_envelope(QPainter &p,
 470         const shared_ptr<pv::data::AnalogSegment> &segment,
 471         int y, int left, const int64_t start, const int64_t end,
 472         const double pixels_offset, const double samples_per_pixel)
 473 {
 474         using pv::data::AnalogSegment;
 475
 476         // Note: Envelope painting currently doesn't generate a pixel<->value lookup table
 477         if (show_hover_marker_)
 478                 reset_pixel_values();
 479
 480         AnalogSegment::EnvelopeSection e;
 481         segment->get_envelope_section(e, start, end, samples_per_pixel);
 482
 483         if (e.length < 2)
 484                 return;
 485
 486         p.setPen(QPen(Qt::NoPen));
 487         p.setBrush(base_->color());
 488
 489         QRectF *const rects = new QRectF[e.length];
 490         QRectF *rect = rects;
 491
 492         for (uint64_t sample = 0; sample < e.length - 1; sample++) {
 493                 const float x = ((e.scale * sample + e.start) /
 494                         samples_per_pixel - pixels_offset) + left;
 495
 496                 const AnalogSegment::EnvelopeSample *const s = e.samples + sample;
 497
 498                 // We overlap this sample with the next so that vertical
 499                 // gaps do not appear during steep rising or falling edges
 500                 const float b = y - max(s->max, (s + 1)->min) * scale_;
 501                 const float t = y - min(s->min, (s + 1)->max) * scale_;
 502
 503                 float h = b - t;
 504                 if (h >= 0.0f && h <= 1.0f)
 505                         h = 1.0f;
 506                 if (h <= 0.0f && h >= -1.0f)
 507                         h = -1.0f;
 508
 509                 *rect++ = QRectF(x, t, 1.0f, h);
 510         }
 511
 512         p.drawRects(rects, e.length);
 513
 514         delete[] rects;
 515         delete[] e.samples;
 516 }
 517
 518 void AnalogSignal::paint_logic_mid(QPainter &p, ViewItemPaintParams &pp)
 519 {
 520         QLineF *line;
 521
 522         vector< pair<int64_t, bool> > edges;
 523
 524         assert(base_);
 525
 526         const int y = get_visual_y();
 527
 528         if (!base_->enabled() || !base_->logic_data())
 529                 return;
 530
 531         const int signal_margin =
 532                 QFontMetrics(QApplication::font()).height() / 2;
 533
 534         const int ph = min(pos_vdivs_, 1) * div_height_;
 535         const int nh = min(neg_vdivs_, 1) * div_height_;
 536         const float high_offset = y - ph + signal_margin + 0.5f;
 537         const float low_offset = y + nh - signal_margin - 0.5f;
 538
 539         shared_ptr<pv::data::LogicSegment> segment = get_logic_segment_to_paint();
 540         if (!segment || (segment->get_sample_count() == 0))
 541                 return;
 542
 543         double samplerate = segment->samplerate();
 544
 545         // Show sample rate as 1Hz when it is unknown
 546         if (samplerate == 0.0)
 547                 samplerate = 1.0;
 548
 549         const double pixels_offset = pp.pixels_offset();
 550         const pv::util::Timestamp& start_time = segment->start_time();
 551         const int64_t last_sample = (int64_t)segment->get_sample_count() - 1;
 552         const double samples_per_pixel = samplerate * pp.scale();
 553         const double pixels_per_sample = 1 / samples_per_pixel;
 554         const pv::util::Timestamp start = samplerate * (pp.offset() - start_time);
 555         const pv::util::Timestamp end = start + samples_per_pixel * pp.width();
 556
 557         const int64_t start_sample = min(max(floor(start).convert_to<int64_t>(),
 558                 (int64_t)0), last_sample);
 559         const uint64_t end_sample = min(max(ceil(end).convert_to<int64_t>(),
 560                 (int64_t)0), last_sample);
 561
 562         segment->get_subsampled_edges(edges, start_sample, end_sample,
 563                 samples_per_pixel / LogicSignal::Oversampling, 0);
 564         assert(edges.size() >= 2);
 565
 566         // Check whether we need to paint the sampling points
 567         GlobalSettings settings;
 568         const bool show_sampling_points =
 569                 settings.value(GlobalSettings::Key_View_ShowSamplingPoints).toBool() &&
 570                 (samples_per_pixel < 0.25);
 571
 572         vector<QRectF> sampling_points;
 573         float sampling_point_x = 0.0f;
 574         int64_t sampling_point_sample = start_sample;
 575         const int w = 2;
 576
 577         if (show_sampling_points) {
 578                 sampling_points.reserve(end_sample - start_sample + 1);
 579                 sampling_point_x = (edges.cbegin()->first / samples_per_pixel - pixels_offset) + pp.left();
 580         }
 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         for (auto i = edges.cbegin() + 1; i != edges.cend() - 1; i++) {
 588                 const float x = ((*i).first / samples_per_pixel -
 589                         pixels_offset) + pp.left();
 590                 *line++ = QLineF(x, high_offset, x, low_offset);
 591
 592                 if (show_sampling_points)
 593                         while (sampling_point_sample < (*i).first) {
 594                                 const float y = (*i).second ? low_offset : high_offset;
 595                                 sampling_points.emplace_back(
 596                                         QRectF(sampling_point_x - (w / 2), y - (w / 2), w, w));
 597                                 sampling_point_sample++;
 598                                 sampling_point_x += pixels_per_sample;
 599                         };
 600         }
 601
 602         // Calculate the sample points from the last edge to the end of the trace
 603         if (show_sampling_points)
 604                 while ((uint64_t)sampling_point_sample <= end_sample) {
 605                         // Signal changed after the last edge, so the level is inverted
 606                         const float y = (edges.cend() - 1)->second ? high_offset : low_offset;
 607                         sampling_points.emplace_back(
 608                                 QRectF(sampling_point_x - (w / 2), y - (w / 2), w, w));
 609                         sampling_point_sample++;
 610                         sampling_point_x += pixels_per_sample;
 611                 };
 612
 613         p.setPen(LogicSignal::EdgeColor);
 614         p.drawLines(edge_lines, edge_count);
 615         delete[] edge_lines;
 616
 617         // Paint the caps
 618         const unsigned int max_cap_line_count = edges.size();
 619         QLineF *const cap_lines = new QLineF[max_cap_line_count];
 620
 621         p.setPen(LogicSignal::HighColor);
 622         paint_logic_caps(p, cap_lines, edges, true, samples_per_pixel,
 623                 pixels_offset, pp.left(), high_offset);
 624         p.setPen(LogicSignal::LowColor);
 625         paint_logic_caps(p, cap_lines, edges, false, samples_per_pixel,
 626                 pixels_offset, pp.left(), low_offset);
 627
 628         delete[] cap_lines;
 629
 630         // Paint the sampling points
 631         if (show_sampling_points) {
 632                 p.setPen(SamplingPointColor);
 633                 p.drawRects(sampling_points.data(), sampling_points.size());
 634         }
 635 }
 636
 637 void AnalogSignal::paint_logic_caps(QPainter &p, QLineF *const lines,
 638         vector< pair<int64_t, bool> > &edges, bool level,
 639         double samples_per_pixel, double pixels_offset, float x_offset,
 640         float y_offset)
 641 {
 642         QLineF *line = lines;
 643
 644         for (auto i = edges.begin(); i != (edges.end() - 1); i++)
 645                 if ((*i).second == level) {
 646                         *line++ = QLineF(
 647                                 ((*i).first / samples_per_pixel -
 648                                         pixels_offset) + x_offset, y_offset,
 649                                 ((*(i+1)).first / samples_per_pixel -
 650                                         pixels_offset) + x_offset, y_offset);
 651                 }
 652
 653         p.drawLines(lines, line - lines);
 654 }
 655
 656 shared_ptr<pv::data::AnalogSegment> AnalogSignal::get_analog_segment_to_paint() const
 657 {
 658         shared_ptr<pv::data::AnalogSegment> segment;
 659
 660         const deque< shared_ptr<pv::data::AnalogSegment> > &segments =
 661                 base_->analog_data()->analog_segments();
 662
 663         if (!segments.empty()) {
 664                 if (segment_display_mode_ == ShowLastSegmentOnly)
 665                         segment = segments.back();
 666
 667                 if ((segment_display_mode_ == ShowSingleSegmentOnly) ||
 668                                 (segment_display_mode_ == ShowLastCompleteSegmentOnly)) {
 669                         try {
 670                                 segment = segments.at(current_segment_);
 671                         } catch (out_of_range&) {
 672                                 qDebug() << "Current analog segment out of range for signal" << base_->name() << ":" << current_segment_;
 673                         }
 674                 }
 675         }
 676
 677         return segment;
 678 }
 679
 680 shared_ptr<pv::data::LogicSegment> AnalogSignal::get_logic_segment_to_paint() const
 681 {
 682         shared_ptr<pv::data::LogicSegment> segment;
 683
 684         const deque< shared_ptr<pv::data::LogicSegment> > &segments =
 685                 base_->logic_data()->logic_segments();
 686
 687         if (!segments.empty()) {
 688                 if (segment_display_mode_ == ShowLastSegmentOnly)
 689                         segment = segments.back();
 690
 691                 if ((segment_display_mode_ == ShowSingleSegmentOnly) ||
 692                                 (segment_display_mode_ == ShowLastCompleteSegmentOnly)) {
 693                         try {
 694                                 segment = segments.at(current_segment_);
 695                         } catch (out_of_range&) {
 696                                 qDebug() << "Current logic segment out of range for signal" << base_->name() << ":" << current_segment_;
 697                         }
 698                 }
 699         }
 700
 701         return segment;
 702 }
 703
 704 float AnalogSignal::get_resolution(int scale_index)
 705 {
 706         const float seq[] = {1.0f, 2.0f, 5.0f};
 707
 708         const int offset = numeric_limits<int>::max() / (2 * countof(seq));
 709         const div_t d = div((int)(scale_index + countof(seq) * offset),
 710                 countof(seq));
 711
 712         return powf(10.0f, d.quot - offset) * seq[d.rem];
 713 }
 714
 715 void AnalogSignal::update_scale()
 716 {
 717         resolution_ = get_resolution(scale_index_);
 718         scale_ = div_height_ / resolution_;
 719 }
 720
 721 void AnalogSignal::update_conversion_widgets()
 722 {
 723         SignalBase::ConversionType conv_type = base_->get_conversion_type();
 724
 725         // Enable or disable widgets depending on conversion state
 726         conv_threshold_cb_->setEnabled(conv_type != SignalBase::NoConversion);
 727         display_type_cb_->setEnabled(conv_type != SignalBase::NoConversion);
 728
 729         conv_threshold_cb_->clear();
 730
 731         vector < pair<QString, int> > presets = base_->get_conversion_presets();
 732
 733         // Prevent the combo box from firing the "edit text changed" signal
 734         // as that would involuntarily select the first entry
 735         conv_threshold_cb_->blockSignals(true);
 736
 737         // Set available options depending on chosen conversion
 738         for (pair<QString, int> preset : presets)
 739                 conv_threshold_cb_->addItem(preset.first, preset.second);
 740
 741         map < QString, QVariant > options = base_->get_conversion_options();
 742
 743         if (conv_type == SignalBase::A2LConversionByThreshold) {
 744                 const vector<double> thresholds = base_->get_conversion_thresholds(
 745                                 SignalBase::A2LConversionByThreshold, true);
 746                 conv_threshold_cb_->addItem(
 747                                 QString("%1V").arg(QString::number(thresholds[0], 'f', 1)), -1);
 748         }
 749
 750         if (conv_type == SignalBase::A2LConversionBySchmittTrigger) {
 751                 const vector<double> thresholds = base_->get_conversion_thresholds(
 752                                 SignalBase::A2LConversionBySchmittTrigger, true);
 753                 conv_threshold_cb_->addItem(QString("%1V/%2V").arg(
 754                                 QString::number(thresholds[0], 'f', 1),
 755                                 QString::number(thresholds[1], 'f', 1)), -1);
 756         }
 757
 758         int preset_id = base_->get_current_conversion_preset();
 759         conv_threshold_cb_->setCurrentIndex(
 760                         conv_threshold_cb_->findData(preset_id));
 761
 762         conv_threshold_cb_->blockSignals(false);
 763 }
 764
 765 void AnalogSignal::perform_autoranging(bool keep_divs, bool force_update)
 766 {
 767         const deque< shared_ptr<pv::data::AnalogSegment> > &segments =
 768                 base_->analog_data()->analog_segments();
 769
 770         if (segments.empty())
 771                 return;
 772
 773         static double prev_min = 0, prev_max = 0;
 774         double min = 0, max = 0;
 775
 776         for (shared_ptr<pv::data::AnalogSegment> segment : segments) {
 777                 pair<double, double> mm = segment->get_min_max();
 778                 min = std::min(min, mm.first);
 779                 max = std::max(max, mm.second);
 780         }
 781
 782         if ((min == prev_min) && (max == prev_max) && !force_update)
 783                 return;
 784
 785         prev_min = min;
 786         prev_max = max;
 787
 788         // If we're allowed to alter the div assignment...
 789         if (!keep_divs) {
 790                 // Use all divs for the positive range if there are no negative values
 791                 if ((min == 0) && (neg_vdivs_ > 0)) {
 792                         pos_vdivs_ += neg_vdivs_;
 793                         neg_vdivs_ = 0;
 794                 }
 795
 796                 // Split up the divs if there are negative values but no negative divs
 797                 if ((min < 0) && (neg_vdivs_ == 0)) {
 798                         neg_vdivs_ = pos_vdivs_ / 2;
 799                         pos_vdivs_ -= neg_vdivs_;
 800                 }
 801         }
 802
 803         // If there is still no positive div when we need it, add one
 804         // (this can happen when pos_vdivs==neg_vdivs==0)
 805         if ((max > 0) && (pos_vdivs_ == 0)) {
 806                 pos_vdivs_ = 1;
 807                 owner_->extents_changed(false, true);
 808         }
 809
 810         // If there is still no negative div when we need it, add one
 811         // (this can happen when pos_vdivs was 0 or 1 when trying to split)
 812         if ((min < 0) && (neg_vdivs_ == 0)) {
 813                 neg_vdivs_ = 1;
 814                 owner_->extents_changed(false, true);
 815         }
 816
 817         double min_value_per_div;
 818         if ((pos_vdivs_ > 0) && (neg_vdivs_ >  0))
 819                 min_value_per_div = std::max(max / pos_vdivs_, -min / neg_vdivs_);
 820         else if (pos_vdivs_ > 0)
 821                 min_value_per_div = max / pos_vdivs_;
 822         else
 823                 min_value_per_div = -min / neg_vdivs_;
 824
 825         // Find first scale value that is bigger than the value we need
 826         for (int i = MinScaleIndex; i < MaxScaleIndex; i++)
 827                 if (get_resolution(i) > min_value_per_div) {
 828                         scale_index_ = i;
 829                         break;
 830                 }
 831
 832         update_scale();
 833 }
 834
 835 void AnalogSignal::reset_pixel_values()
 836 {
 837         value_at_pixel_pos_.clear();
 838         current_pixel_pos_ = -1;
 839         prev_value_at_pixel_ = std::numeric_limits<float>::quiet_NaN();
 840 }
 841
 842 void AnalogSignal::process_next_sample_value(float x, float value)
 843 {
 844         // Note: NAN is used to indicate the non-existance of a value at this pixel
 845
 846         if (std::isnan(prev_value_at_pixel_)) {
 847                 if (x < 0) {
 848                         min_value_at_pixel_ = value;
 849                         max_value_at_pixel_ = value;
 850                         prev_value_at_pixel_ = value;
 851                         current_pixel_pos_ = x;
 852                 } else
 853                         prev_value_at_pixel_ = std::numeric_limits<float>::quiet_NaN();
 854         }
 855
 856         const int pixel_pos = (int)(x + 0.5);
 857
 858         if (pixel_pos > current_pixel_pos_) {
 859                 if (pixel_pos - current_pixel_pos_ == 1) {
 860                         if (std::isnan(prev_value_at_pixel_)) {
 861                                 value_at_pixel_pos_.push_back(prev_value_at_pixel_);
 862                         } else {
 863                                 // Average the min/max range to create one value for the previous pixel
 864                                 const float avg = (min_value_at_pixel_ + max_value_at_pixel_) / 2;
 865                                 value_at_pixel_pos_.push_back(avg);
 866                         }
 867                 } else {
 868                         // Interpolate values to create values for the intermediate pixels
 869                         const float start_value = prev_value_at_pixel_;
 870                         const float end_value = value;
 871                         const int steps = fabs(pixel_pos - current_pixel_pos_);
 872                         const double gradient = (end_value - start_value) / steps;
 873                         for (int i = 0; i < steps; i++) {
 874                                 if (current_pixel_pos_ + i < 0)
 875                                         continue;
 876                                 value_at_pixel_pos_.push_back(start_value + i * gradient);
 877                         }
 878                 }
 879
 880                 min_value_at_pixel_ = value;
 881                 max_value_at_pixel_ = value;
 882                 prev_value_at_pixel_ = value;
 883                 current_pixel_pos_ = pixel_pos;
 884         } else {
 885                 // Another sample for the same pixel
 886                 if (value < min_value_at_pixel_)
 887                         min_value_at_pixel_ = value;
 888                 if (value > max_value_at_pixel_)
 889                         max_value_at_pixel_ = value;
 890         }
 891 }
 892
 893 void AnalogSignal::populate_popup_form(QWidget *parent, QFormLayout *form)
 894 {
 895         // Add the standard options
 896         Signal::populate_popup_form(parent, form);
 897
 898         QFormLayout *const layout = new QFormLayout;
 899
 900         // Add div-related settings
 901         pvdiv_sb_ = new QSpinBox(parent);
 902         pvdiv_sb_->setRange(0, MaximumVDivs);
 903         pvdiv_sb_->setValue(pos_vdivs_);
 904         connect(pvdiv_sb_, SIGNAL(valueChanged(int)),
 905                 this, SLOT(on_pos_vdivs_changed(int)));
 906         layout->addRow(tr("Number of pos vertical divs"), pvdiv_sb_);
 907
 908         nvdiv_sb_ = new QSpinBox(parent);
 909         nvdiv_sb_->setRange(0, MaximumVDivs);
 910         nvdiv_sb_->setValue(neg_vdivs_);
 911         connect(nvdiv_sb_, SIGNAL(valueChanged(int)),
 912                 this, SLOT(on_neg_vdivs_changed(int)));
 913         layout->addRow(tr("Number of neg vertical divs"), nvdiv_sb_);
 914
 915         div_height_sb_ = new QSpinBox(parent);
 916         div_height_sb_->setRange(20, 1000);
 917         div_height_sb_->setSingleStep(5);
 918         div_height_sb_->setSuffix(tr(" pixels"));
 919         div_height_sb_->setValue(div_height_);
 920         connect(div_height_sb_, SIGNAL(valueChanged(int)),
 921                 this, SLOT(on_div_height_changed(int)));
 922         layout->addRow(tr("Div height"), div_height_sb_);
 923
 924         // Add the vertical resolution
 925         resolution_cb_ = new QComboBox(parent);
 926
 927         for (int i = MinScaleIndex; i < MaxScaleIndex; i++) {
 928                 const QString label = QString("%1").arg(get_resolution(i));
 929                 resolution_cb_->insertItem(0, label, QVariant(i));
 930         }
 931
 932         int cur_idx = resolution_cb_->findData(QVariant(scale_index_));
 933         resolution_cb_->setCurrentIndex(cur_idx);
 934
 935         connect(resolution_cb_, SIGNAL(currentIndexChanged(int)),
 936                 this, SLOT(on_resolution_changed(int)));
 937
 938         QGridLayout *const vdiv_layout = new QGridLayout;
 939         QLabel *const vdiv_unit = new QLabel(tr("V/div"));
 940         vdiv_layout->addWidget(resolution_cb_, 0, 0);
 941         vdiv_layout->addWidget(vdiv_unit, 0, 1);
 942
 943         layout->addRow(tr("Vertical resolution"), vdiv_layout);
 944
 945         // Add the autoranging checkbox
 946         QCheckBox* autoranging_cb = new QCheckBox();
 947         autoranging_cb->setCheckState(autoranging_ ? Qt::Checked : Qt::Unchecked);
 948
 949         connect(autoranging_cb, SIGNAL(stateChanged(int)),
 950                 this, SLOT(on_autoranging_changed(int)));
 951
 952         layout->addRow(tr("Autoranging"), autoranging_cb);
 953
 954         // Add the conversion type dropdown
 955         conversion_cb_ = new QComboBox();
 956
 957         conversion_cb_->addItem(tr("none"),
 958                 SignalBase::NoConversion);
 959         conversion_cb_->addItem(tr("to logic via threshold"),
 960                 SignalBase::A2LConversionByThreshold);
 961         conversion_cb_->addItem(tr("to logic via schmitt-trigger"),
 962                 SignalBase::A2LConversionBySchmittTrigger);
 963
 964         cur_idx = conversion_cb_->findData(QVariant(base_->get_conversion_type()));
 965         conversion_cb_->setCurrentIndex(cur_idx);
 966
 967         layout->addRow(tr("Conversion"), conversion_cb_);
 968
 969         connect(conversion_cb_, SIGNAL(currentIndexChanged(int)),
 970                 this, SLOT(on_conversion_changed(int)));
 971
 972     // Add the conversion threshold settings
 973     conv_threshold_cb_ = new QComboBox();
 974     conv_threshold_cb_->setEditable(true);
 975
 976     layout->addRow(tr("Conversion threshold(s)"), conv_threshold_cb_);
 977
 978     connect(conv_threshold_cb_, SIGNAL(currentIndexChanged(int)),
 979             this, SLOT(on_conv_threshold_changed(int)));
 980     connect(conv_threshold_cb_, SIGNAL(editTextChanged(const QString&)),
 981             this, SLOT(on_conv_threshold_changed()));  // index will be -1
 982
 983         // Add the display type dropdown
 984         display_type_cb_ = new QComboBox();
 985
 986         display_type_cb_->addItem(tr("analog"), DisplayAnalog);
 987         display_type_cb_->addItem(tr("converted"), DisplayConverted);
 988         display_type_cb_->addItem(tr("analog+converted"), DisplayBoth);
 989
 990         cur_idx = display_type_cb_->findData(QVariant(display_type_));
 991         display_type_cb_->setCurrentIndex(cur_idx);
 992
 993         layout->addRow(tr("Show traces for"), display_type_cb_);
 994
 995         connect(display_type_cb_, SIGNAL(currentIndexChanged(int)),
 996                 this, SLOT(on_display_type_changed(int)));
 997
 998         // Update the conversion widget contents and states
 999         update_conversion_widgets();
1000
1001         form->addRow(layout);
1002 }
1003
1004 void AnalogSignal::hover_point_changed(const QPoint &hp)
1005 {
1006         Signal::hover_point_changed(hp);
1007
1008         // Note: Even though the view area begins at 0, we exclude 0 because
1009         // that's also the value given when the cursor is over the header to the
1010         // left of the trace paint area
1011         if (hp.x() <= 0) {
1012                 value_at_hover_pos_ = std::numeric_limits<float>::quiet_NaN();
1013         } else {
1014                 try {
1015                         value_at_hover_pos_ = value_at_pixel_pos_.at(hp.x());
1016                 } catch (out_of_range&) {
1017                         value_at_hover_pos_ = std::numeric_limits<float>::quiet_NaN();
1018                 }
1019         }
1020 }
1021
1022 void AnalogSignal::on_min_max_changed(float min, float max)
1023 {
1024         (void)min;
1025         (void)max;
1026
1027         if (autoranging_)
1028                 perform_autoranging(false, false);
1029 }
1030
1031 void AnalogSignal::on_pos_vdivs_changed(int vdivs)
1032 {
1033         if (vdivs == pos_vdivs_)
1034                 return;
1035
1036         pos_vdivs_ = vdivs;
1037
1038         // There has to be at least one div, positive or negative
1039         if ((neg_vdivs_ == 0) && (pos_vdivs_ == 0)) {
1040                 pos_vdivs_ = 1;
1041                 if (pvdiv_sb_)
1042                         pvdiv_sb_->setValue(pos_vdivs_);
1043         }
1044
1045         if (autoranging_) {
1046                 perform_autoranging(true, true);
1047
1048                 // It could be that a positive or negative div was added, so update
1049                 if (pvdiv_sb_) {
1050                         pvdiv_sb_->setValue(pos_vdivs_);
1051                         nvdiv_sb_->setValue(neg_vdivs_);
1052                 }
1053         }
1054
1055         if (owner_) {
1056                 // Call order is important, otherwise the lazy event handler won't work
1057                 owner_->extents_changed(false, true);
1058                 owner_->row_item_appearance_changed(false, true);
1059         }
1060 }
1061
1062 void AnalogSignal::on_neg_vdivs_changed(int vdivs)
1063 {
1064         if (vdivs == neg_vdivs_)
1065                 return;
1066
1067         neg_vdivs_ = vdivs;
1068
1069         // There has to be at least one div, positive or negative
1070         if ((neg_vdivs_ == 0) && (pos_vdivs_ == 0)) {
1071                 pos_vdivs_ = 1;
1072                 if (pvdiv_sb_)
1073                         pvdiv_sb_->setValue(pos_vdivs_);
1074         }
1075
1076         if (autoranging_) {
1077                 perform_autoranging(true, true);
1078
1079                 // It could be that a positive or negative div was added, so update
1080                 if (pvdiv_sb_) {
1081                         pvdiv_sb_->setValue(pos_vdivs_);
1082                         nvdiv_sb_->setValue(neg_vdivs_);
1083                 }
1084         }
1085
1086         if (owner_) {
1087                 // Call order is important, otherwise the lazy event handler won't work
1088                 owner_->extents_changed(false, true);
1089                 owner_->row_item_appearance_changed(false, true);
1090         }
1091 }
1092
1093 void AnalogSignal::on_div_height_changed(int height)
1094 {
1095         div_height_ = height;
1096         update_scale();
1097
1098         if (owner_) {
1099                 // Call order is important, otherwise the lazy event handler won't work
1100                 owner_->extents_changed(false, true);
1101                 owner_->row_item_appearance_changed(false, true);
1102         }
1103 }
1104
1105 void AnalogSignal::on_resolution_changed(int index)
1106 {
1107         scale_index_ = resolution_cb_->itemData(index).toInt();
1108         update_scale();
1109
1110         if (owner_)
1111                 owner_->row_item_appearance_changed(false, true);
1112 }
1113
1114 void AnalogSignal::on_autoranging_changed(int state)
1115 {
1116         autoranging_ = (state == Qt::Checked);
1117
1118         if (autoranging_)
1119                 perform_autoranging(false, true);
1120
1121         if (owner_) {
1122                 // Call order is important, otherwise the lazy event handler won't work
1123                 owner_->extents_changed(false, true);
1124                 owner_->row_item_appearance_changed(false, true);
1125         }
1126 }
1127
1128 void AnalogSignal::on_conversion_changed(int index)
1129 {
1130         SignalBase::ConversionType old_conv_type = base_->get_conversion_type();
1131
1132         SignalBase::ConversionType conv_type =
1133                 (SignalBase::ConversionType)(conversion_cb_->itemData(index).toInt());
1134
1135         if (conv_type != old_conv_type) {
1136                 base_->set_conversion_type(conv_type);
1137                 update_conversion_widgets();
1138
1139                 if (owner_)
1140                         owner_->row_item_appearance_changed(false, true);
1141         }
1142 }
1143
1144 void AnalogSignal::on_conv_threshold_changed(int index)
1145 {
1146         SignalBase::ConversionType conv_type = base_->get_conversion_type();
1147
1148         // Note: index is set to -1 if the text in the combo box matches none of
1149         // the entries in the combo box
1150
1151         if ((index == -1) && (conv_threshold_cb_->currentText().length() == 0))
1152                 return;
1153
1154         // The combo box entry with the custom value has user_data set to -1
1155         const int user_data = conv_threshold_cb_->findText(
1156                         conv_threshold_cb_->currentText());
1157
1158         const bool use_custom_thr = (index == -1) || (user_data == -1);
1159
1160         if (conv_type == SignalBase::A2LConversionByThreshold && use_custom_thr) {
1161                 // Not one of the preset values, try to parse the combo box text
1162                 // Note: Regex loosely based on
1163                 // https://txt2re.com/index-c++.php3?s=0.1V&1&-13
1164                 QString re1 = "([+-]?\\d*[\\.,]?\\d*)"; // Float value
1165                 QString re2 = "([a-zA-Z]*)"; // SI unit
1166                 QRegExp regex(re1 + re2);
1167
1168                 const QString text = conv_threshold_cb_->currentText();
1169                 if (!regex.exactMatch(text))
1170                         return;  // String doesn't match the regex
1171
1172                 QStringList tokens = regex.capturedTexts();
1173
1174                 // For now, we simply assume that the unit is volt without modifiers
1175                 const double thr = tokens.at(1).toDouble();
1176
1177                 // Only restart the conversion if the threshold was updated.
1178                 // We're starting a delayed conversion because the user may still be
1179                 // typing and the UI would lag if we kept on restarting it immediately
1180                 if (base_->set_conversion_option("threshold_value", thr))
1181                         base_->start_conversion(true);
1182         }
1183
1184         if (conv_type == SignalBase::A2LConversionBySchmittTrigger && use_custom_thr) {
1185                 // Not one of the preset values, try to parse the combo box text
1186                 // Note: Regex loosely based on
1187                 // https://txt2re.com/index-c++.php3?s=0.1V/0.2V&2&14&-22&3&15
1188                 QString re1 = "([+-]?\\d*[\\.,]?\\d*)"; // Float value
1189                 QString re2 = "([a-zA-Z]*)"; // SI unit
1190                 QString re3 = "\\/"; // Forward slash, not captured
1191                 QString re4 = "([+-]?\\d*[\\.,]?\\d*)"; // Float value
1192                 QString re5 = "([a-zA-Z]*)"; // SI unit
1193                 QRegExp regex(re1 + re2 + re3 + re4 + re5);
1194
1195                 const QString text = conv_threshold_cb_->currentText();
1196                 if (!regex.exactMatch(text))
1197                         return;  // String doesn't match the regex
1198
1199                 QStringList tokens = regex.capturedTexts();
1200
1201                 // For now, we simply assume that the unit is volt without modifiers
1202                 const double low_thr = tokens.at(1).toDouble();
1203                 const double high_thr = tokens.at(3).toDouble();
1204
1205                 // Only restart the conversion if one of the options was updated.
1206                 // We're starting a delayed conversion because the user may still be
1207                 // typing and the UI would lag if we kept on restarting it immediately
1208                 bool o1 = base_->set_conversion_option("threshold_value_low", low_thr);
1209                 bool o2 = base_->set_conversion_option("threshold_value_high", high_thr);
1210                 if (o1 || o2)
1211                         base_->start_conversion(true);  // Start delayed conversion
1212         }
1213
1214         base_->set_conversion_preset((SignalBase::ConversionPreset)index);
1215
1216         // Immediately start the conversion if we're not using custom values
1217         // (i.e. we're using one of the presets)
1218         if (!use_custom_thr)
1219                 base_->start_conversion();
1220 }
1221
1222 void AnalogSignal::on_delayed_conversion_starter()
1223 {
1224         base_->start_conversion();
1225 }
1226
1227 void AnalogSignal::on_display_type_changed(int index)
1228 {
1229         display_type_ = (DisplayType)(display_type_cb_->itemData(index).toInt());
1230
1231         if (owner_)
1232                 owner_->row_item_appearance_changed(false, true);
1233 }
1234
1235 void AnalogSignal::on_settingViewConversionThresholdDispMode_changed(const QVariant new_value)
1236 {
1237         conversion_threshold_disp_mode_ = new_value.toInt();
1238
1239         if (owner_)
1240                 owner_->row_item_appearance_changed(false, true);
1241 }
1242
1243 } // namespace trace
1244 } // namespace views
1245 } // namespace pv