pv/views/trace/analogsignal.cpp

   1 /*
   2  * This file is part of the PulseView project.
   3  *
   4  * Copyright (C) 2012 Joel Holdsworth <joel@airwebreathe.org.uk>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 #include <extdef.h>
  21
  22 #include <cassert>
  23 #include <cmath>
  24 #include <cstdlib>
  25 #include <limits>
  26 #include <vector>
  27
  28 #include <QApplication>
  29 #include <QCheckBox>
  30 #include <QComboBox>
  31 #include <QDebug>
  32 #include <QFormLayout>
  33 #include <QGridLayout>
  34 #include <QLabel>
  35 #include <QString>
  36
  37 #include "analogsignal.hpp"
  38 #include "logicsignal.hpp"
  39 #include "view.hpp"
  40
  41 #include "pv/util.hpp"
  42 #include "pv/data/analog.hpp"
  43 #include "pv/data/analogsegment.hpp"
  44 #include "pv/data/logic.hpp"
  45 #include "pv/data/logicsegment.hpp"
  46 #include "pv/data/signalbase.hpp"
  47 #include "pv/globalsettings.hpp"
  48
  49 #include <libsigrokcxx/libsigrokcxx.hpp>
  50
  51 using std::deque;
  52 using std::div;
  53 using std::div_t;
  54 // Note that "using std::isnan;" is _not_ put here since that would break
  55 // compilation on some platforms. Use "std::isnan()" instead in checks below.
  56 using std::max;
  57 using std::make_pair;
  58 using std::min;
  59 using std::numeric_limits;
  60 using std::out_of_range;
  61 using std::pair;
  62 using std::shared_ptr;
  63 using std::vector;
  64
  65 using pv::data::LogicSegment;
  66 using pv::data::SignalBase;
  67 using pv::util::SIPrefix;
  68
  69 namespace pv {
  70 namespace views {
  71 namespace trace {
  72
  73 const QColor AnalogSignal::SignalColors[4] = {
  74         QColor(0xC4, 0xA0, 0x00),       // Yellow
  75         QColor(0x87, 0x20, 0x7A),       // Magenta
  76         QColor(0x20, 0x4A, 0x87),       // Blue
  77         QColor(0x4E, 0x9A, 0x06)        // Green
  78 };
  79
  80 const QPen AnalogSignal::AxisPen(QColor(0, 0, 0, 30 * 256 / 100), 2);
  81 const QColor AnalogSignal::GridMajorColor = QColor(0, 0, 0, 40 * 256 / 100);
  82 const QColor AnalogSignal::GridMinorColor = QColor(0, 0, 0, 20 * 256 / 100);
  83
  84 const QColor AnalogSignal::SamplingPointColor(0x77, 0x77, 0x77);
  85 const QColor AnalogSignal::SamplingPointColorLo = QColor(200, 0, 0, 80 * 256 / 100);
  86 const QColor AnalogSignal::SamplingPointColorNe = QColor(0,   0, 0, 80 * 256 / 100);
  87 const QColor AnalogSignal::SamplingPointColorHi = QColor(0, 200, 0, 80 * 256 / 100);
  88
  89 const QColor AnalogSignal::ThresholdColor = QColor(0, 0, 0, 30 * 256 / 100);
  90 const QColor AnalogSignal::ThresholdColorLo = QColor(255, 0, 0, 8 * 256 / 100);
  91 const QColor AnalogSignal::ThresholdColorNe = QColor(0,   0, 0, 10 * 256 / 100);
  92 const QColor AnalogSignal::ThresholdColorHi = QColor(0, 255, 0, 8 * 256 / 100);
  93
  94 const int64_t AnalogSignal::TracePaintBlockSize = 1024 * 1024;  // 4 MiB (due to float)
  95 const float AnalogSignal::EnvelopeThreshold = 64.0f;
  96
  97 const int AnalogSignal::MaximumVDivs = 10;
  98 const int AnalogSignal::MinScaleIndex = -6;
  99 const int AnalogSignal::MaxScaleIndex = 7;
 100
 101 const int AnalogSignal::InfoTextMarginRight = 20;
 102 const int AnalogSignal::InfoTextMarginBottom = 5;
 103
 104 AnalogSignal::AnalogSignal(
 105         pv::Session &session,
 106         shared_ptr<data::SignalBase> base) :
 107         Signal(session, base),
 108         scale_index_(4), // 20 per div
 109         pos_vdivs_(1),
 110         neg_vdivs_(1),
 111         resolution_(0),
 112         display_type_(DisplayBoth),
 113         autoranging_(true),
 114         value_at_hover_pos_(std::numeric_limits<float>::quiet_NaN())
 115 {
 116         axis_pen_ = AxisPen;
 117
 118         pv::data::Analog* analog_data =
 119                 dynamic_cast<pv::data::Analog*>(data().get());
 120
 121         connect(analog_data, SIGNAL(min_max_changed(float, float)),
 122                 this, SLOT(on_min_max_changed(float, float)));
 123
 124         GlobalSettings gs;
 125         conversion_threshold_disp_mode_ =
 126                 gs.value(GlobalSettings::Key_View_ConversionThresholdDispMode).toInt();
 127
 128         div_height_ = gs.value(GlobalSettings::Key_View_DefaultDivHeight).toInt();
 129
 130         base_->set_color(SignalColors[base_->index() % countof(SignalColors)]);
 131         update_scale();
 132 }
 133
 134 shared_ptr<pv::data::SignalData> AnalogSignal::data() const
 135 {
 136         return base_->analog_data();
 137 }
 138
 139 void AnalogSignal::save_settings(QSettings &settings) const
 140 {
 141         settings.setValue("pos_vdivs", pos_vdivs_);
 142         settings.setValue("neg_vdivs", neg_vdivs_);
 143         settings.setValue("scale_index", scale_index_);
 144         settings.setValue("display_type", display_type_);
 145         settings.setValue("autoranging", autoranging_);
 146         settings.setValue("div_height", div_height_);
 147 }
 148
 149 void AnalogSignal::restore_settings(QSettings &settings)
 150 {
 151         if (settings.contains("pos_vdivs"))
 152                 pos_vdivs_ = settings.value("pos_vdivs").toInt();
 153
 154         if (settings.contains("neg_vdivs"))
 155                 neg_vdivs_ = settings.value("neg_vdivs").toInt();
 156
 157         if (settings.contains("scale_index")) {
 158                 scale_index_ = settings.value("scale_index").toInt();
 159                 update_scale();
 160         }
 161
 162         if (settings.contains("display_type"))
 163                 display_type_ = (DisplayType)(settings.value("display_type").toInt());
 164
 165         if (settings.contains("autoranging"))
 166                 autoranging_ = settings.value("autoranging").toBool();
 167
 168         if (settings.contains("div_height")) {
 169                 const int old_height = div_height_;
 170                 div_height_ = settings.value("div_height").toInt();
 171
 172                 if ((div_height_ != old_height) && owner_) {
 173                         // Call order is important, otherwise the lazy event handler won't work
 174                         owner_->extents_changed(false, true);
 175                         owner_->row_item_appearance_changed(false, true);
 176                 }
 177         }
 178 }
 179
 180 pair<int, int> AnalogSignal::v_extents() const
 181 {
 182         const int ph = pos_vdivs_ * div_height_;
 183         const int nh = neg_vdivs_ * div_height_;
 184         return make_pair(-ph, nh);
 185 }
 186
 187 void AnalogSignal::on_setting_changed(const QString &key, const QVariant &value)
 188 {
 189         Signal::on_setting_changed(key, value);
 190
 191         if (key == GlobalSettings::Key_View_ConversionThresholdDispMode)
 192                 on_settingViewConversionThresholdDispMode_changed(value);
 193 }
 194
 195 void AnalogSignal::paint_back(QPainter &p, ViewItemPaintParams &pp)
 196 {
 197         if (!base_->enabled())
 198                 return;
 199
 200         bool paint_thr_bg =
 201                 conversion_threshold_disp_mode_ == GlobalSettings::ConvThrDispMode_Background;
 202
 203         const vector<double> thresholds = base_->get_conversion_thresholds();
 204
 205         // Only display thresholds if we have some and we show analog samples
 206         if ((thresholds.size() > 0) && paint_thr_bg &&
 207                 ((display_type_ == DisplayAnalog) || (display_type_ == DisplayBoth))) {
 208
 209                 const int visual_y = get_visual_y();
 210                 const pair<int, int> extents = v_extents();
 211                 const int top = visual_y + extents.first;
 212                 const int btm = visual_y + extents.second;
 213
 214                 // Draw high/neutral/low areas
 215                 if (thresholds.size() == 2) {
 216                         int thr_lo = visual_y - thresholds[0] * scale_;
 217                         int thr_hi = visual_y - thresholds[1] * scale_;
 218                         thr_lo = min(max(thr_lo, top), btm);
 219                         thr_hi = min(max(thr_hi, top), btm);
 220
 221                         p.fillRect(QRectF(pp.left(), top, pp.width(), thr_hi - top),
 222                                 QBrush(ThresholdColorHi));
 223                         p.fillRect(QRectF(pp.left(), thr_hi, pp.width(), thr_lo - thr_hi),
 224                                 QBrush(ThresholdColorNe));
 225                         p.fillRect(QRectF(pp.left(), thr_lo, pp.width(), btm - thr_lo),
 226                                 QBrush(ThresholdColorLo));
 227                 } else {
 228                         int thr = visual_y - thresholds[0] * scale_;
 229                         thr = min(max(thr, top), btm);
 230
 231                         p.fillRect(QRectF(pp.left(), top, pp.width(), thr - top),
 232                                 QBrush(ThresholdColorHi));
 233                         p.fillRect(QRectF(pp.left(), thr, pp.width(), btm - thr),
 234                                 QBrush(ThresholdColorLo));
 235                 }
 236
 237                 paint_axis(p, pp, get_visual_y());
 238         } else {
 239                 Trace::paint_back(p, pp);
 240                 paint_axis(p, pp, get_visual_y());
 241         }
 242 }
 243
 244 void AnalogSignal::paint_mid(QPainter &p, ViewItemPaintParams &pp)
 245 {
 246         assert(base_->analog_data());
 247         assert(owner_);
 248
 249         const int y = get_visual_y();
 250
 251         if (!base_->enabled())
 252                 return;
 253
 254         if ((display_type_ == DisplayAnalog) || (display_type_ == DisplayBoth)) {
 255                 paint_grid(p, y, pp.left(), pp.right());
 256
 257                 shared_ptr<pv::data::AnalogSegment> segment = get_analog_segment_to_paint();
 258                 if (!segment || (segment->get_sample_count() == 0))
 259                         return;
 260
 261                 const double pixels_offset = pp.pixels_offset();
 262                 const double samplerate = max(1.0, segment->samplerate());
 263                 const pv::util::Timestamp& start_time = segment->start_time();
 264                 const int64_t last_sample = (int64_t)segment->get_sample_count() - 1;
 265                 const double samples_per_pixel = samplerate * pp.scale();
 266                 const pv::util::Timestamp start = samplerate * (pp.offset() - start_time);
 267                 const pv::util::Timestamp end = start + samples_per_pixel * pp.width();
 268
 269                 const int64_t start_sample = min(max(floor(start).convert_to<int64_t>(),
 270                         (int64_t)0), last_sample);
 271                 const int64_t end_sample = min(max((ceil(end) + 1).convert_to<int64_t>(),
 272                         (int64_t)0), last_sample);
 273
 274                 if (samples_per_pixel < EnvelopeThreshold)
 275                         paint_trace(p, segment, y, pp.left(), start_sample, end_sample,
 276                                 pixels_offset, samples_per_pixel);
 277                 else
 278                         paint_envelope(p, segment, y, pp.left(), start_sample, end_sample,
 279                                 pixels_offset, samples_per_pixel);
 280         }
 281
 282         if ((display_type_ == DisplayConverted) || (display_type_ == DisplayBoth))
 283                 paint_logic_mid(p, pp);
 284 }
 285
 286 void AnalogSignal::paint_fore(QPainter &p, ViewItemPaintParams &pp)
 287 {
 288         if (!enabled())
 289                 return;
 290
 291         if ((display_type_ == DisplayAnalog) || (display_type_ == DisplayBoth)) {
 292                 const int y = get_visual_y();
 293
 294                 QString infotext;
 295
 296                 // Show the info section on the right side of the trace, including
 297                 // the value at the hover point when the hover marker is enabled
 298                 // and we have corresponding data available
 299                 if (show_hover_marker_ && !std::isnan(value_at_hover_pos_)) {
 300                         infotext = QString("[%1] %2 V/div")
 301                                 .arg(format_value_si(value_at_hover_pos_, SIPrefix::unspecified, 0, "V", false))
 302                                 .arg(resolution_);
 303                 } else
 304                         infotext = QString("%1 V/div").arg(resolution_);
 305
 306                 p.setPen(base_->color());
 307                 p.setFont(QApplication::font());
 308
 309                 const QRectF bounding_rect = QRectF(pp.left(),
 310                                 y + v_extents().first,
 311                                 pp.width() - InfoTextMarginRight,
 312                                 v_extents().second - v_extents().first - InfoTextMarginBottom);
 313
 314                 p.drawText(bounding_rect, Qt::AlignRight | Qt::AlignBottom, infotext);
 315         }
 316
 317         if (show_hover_marker_)
 318                 paint_hover_marker(p);
 319 }
 320
 321 void AnalogSignal::paint_grid(QPainter &p, int y, int left, int right)
 322 {
 323         p.setRenderHint(QPainter::Antialiasing, false);
 324
 325         GlobalSettings settings;
 326         const bool show_analog_minor_grid =
 327                 settings.value(GlobalSettings::Key_View_ShowAnalogMinorGrid).toBool();
 328
 329         if (pos_vdivs_ > 0) {
 330                 p.setPen(QPen(GridMajorColor, 1, Qt::DashLine));
 331                 for (int i = 1; i <= pos_vdivs_; i++) {
 332                         const float dy = i * div_height_;
 333                         p.drawLine(QLineF(left, y - dy, right, y - dy));
 334                 }
 335         }
 336
 337         if ((pos_vdivs_ > 0) && show_analog_minor_grid) {
 338                 p.setPen(QPen(GridMinorColor, 1, Qt::DashLine));
 339                 for (int i = 0; i < pos_vdivs_; i++) {
 340                         const float dy = i * div_height_;
 341                         const float dy25 = dy + (0.25 * div_height_);
 342                         const float dy50 = dy + (0.50 * div_height_);
 343                         const float dy75 = dy + (0.75 * div_height_);
 344                         p.drawLine(QLineF(left, y - dy25, right, y - dy25));
 345                         p.drawLine(QLineF(left, y - dy50, right, y - dy50));
 346                         p.drawLine(QLineF(left, y - dy75, right, y - dy75));
 347                 }
 348         }
 349
 350         if (neg_vdivs_ > 0) {
 351                 p.setPen(QPen(GridMajorColor, 1, Qt::DashLine));
 352                 for (int i = 1; i <= neg_vdivs_; i++) {
 353                         const float dy = i * div_height_;
 354                         p.drawLine(QLineF(left, y + dy, right, y + dy));
 355                 }
 356         }
 357
 358         if ((pos_vdivs_ > 0) && show_analog_minor_grid) {
 359                 p.setPen(QPen(GridMinorColor, 1, Qt::DashLine));
 360                 for (int i = 0; i < neg_vdivs_; i++) {
 361                         const float dy = i * div_height_;
 362                         const float dy25 = dy + (0.25 * div_height_);
 363                         const float dy50 = dy + (0.50 * div_height_);
 364                         const float dy75 = dy + (0.75 * div_height_);
 365                         p.drawLine(QLineF(left, y + dy25, right, y + dy25));
 366                         p.drawLine(QLineF(left, y + dy50, right, y + dy50));
 367                         p.drawLine(QLineF(left, y + dy75, right, y + dy75));
 368                 }
 369         }
 370
 371         p.setRenderHint(QPainter::Antialiasing, true);
 372 }
 373
 374 void AnalogSignal::paint_trace(QPainter &p,
 375         const shared_ptr<pv::data::AnalogSegment> &segment,
 376         int y, int left, const int64_t start, const int64_t end,
 377         const double pixels_offset, const double samples_per_pixel)
 378 {
 379         if (end <= start)
 380                 return;
 381
 382         bool paint_thr_dots =
 383                 (base_->get_conversion_type() != data::SignalBase::NoConversion) &&
 384                 (conversion_threshold_disp_mode_ == GlobalSettings::ConvThrDispMode_Dots);
 385
 386         vector<double> thresholds;
 387         if (paint_thr_dots)
 388                 thresholds = base_->get_conversion_thresholds();
 389
 390         // Calculate and paint the sampling points if enabled and useful
 391         GlobalSettings settings;
 392         const bool show_sampling_points =
 393                 (settings.value(GlobalSettings::Key_View_ShowSamplingPoints).toBool() ||
 394                 paint_thr_dots) && (samples_per_pixel < 0.25);
 395
 396         p.setPen(base_->color());
 397
 398         const int64_t points_count = end - start + 1;
 399
 400         QPointF *points = new QPointF[points_count];
 401         QPointF *point = points;
 402
 403         vector<QRectF> sampling_points[3];
 404
 405         int64_t sample_count = min(points_count, TracePaintBlockSize);
 406         int64_t block_sample = 0;
 407         float *sample_block = new float[TracePaintBlockSize];
 408         segment->get_samples(start, start + sample_count, sample_block);
 409
 410         if (show_hover_marker_)
 411                 reset_pixel_values();
 412
 413         const int w = 2;
 414         for (int64_t sample = start; sample <= end; sample++, block_sample++) {
 415
 416                 // Fetch next block of samples if we finished the current one
 417                 if (block_sample == TracePaintBlockSize) {
 418                         block_sample = 0;
 419                         sample_count = min(points_count - sample, TracePaintBlockSize);
 420                         segment->get_samples(sample, sample + sample_count, sample_block);
 421                 }
 422
 423                 const float abs_x = sample / samples_per_pixel - pixels_offset;
 424                 const float x = left + abs_x;
 425
 426                 *point++ = QPointF(x, y - sample_block[block_sample] * scale_);
 427
 428                 // Generate the pixel<->value lookup table for the mouse hover
 429                 if (show_hover_marker_)
 430                         process_next_sample_value(abs_x, sample_block[block_sample]);
 431
 432                 // Create the sampling points if needed
 433                 if (show_sampling_points) {
 434                         int idx = 0;  // Neutral
 435
 436                         if (paint_thr_dots) {
 437                                 if (thresholds.size() == 1)
 438                                         idx = (sample_block[block_sample] >= thresholds[0]) ? 2 : 1;
 439                                 else if (thresholds.size() == 2) {
 440                                         if (sample_block[block_sample] > thresholds[1])
 441                                                 idx = 2;  // High
 442                                         else if (sample_block[block_sample] < thresholds[0])
 443                                                 idx = 1;  // Low
 444                                 }
 445                         }
 446
 447                         sampling_points[idx].emplace_back(x - (w / 2), y - sample_block[block_sample] * scale_ - (w / 2), w, w);
 448                 }
 449         }
 450         delete[] sample_block;
 451
 452         p.drawPolyline(points, points_count);
 453
 454         if (show_sampling_points) {
 455                 if (paint_thr_dots) {
 456                         p.setPen(SamplingPointColorNe);
 457                         p.drawRects(sampling_points[0].data(), sampling_points[0].size());
 458                         p.setPen(SamplingPointColorLo);
 459                         p.drawRects(sampling_points[1].data(), sampling_points[1].size());
 460                         p.setPen(SamplingPointColorHi);
 461                         p.drawRects(sampling_points[2].data(), sampling_points[2].size());
 462                 } else {
 463                         p.setPen(SamplingPointColor);
 464                         p.drawRects(sampling_points[0].data(), sampling_points[0].size());
 465                 }
 466         }
 467
 468         delete[] points;
 469 }
 470
 471 void AnalogSignal::paint_envelope(QPainter &p,
 472         const shared_ptr<pv::data::AnalogSegment> &segment,
 473         int y, int left, const int64_t start, const int64_t end,
 474         const double pixels_offset, const double samples_per_pixel)
 475 {
 476         using pv::data::AnalogSegment;
 477
 478         // Note: Envelope painting currently doesn't generate a pixel<->value lookup table
 479         if (show_hover_marker_)
 480                 reset_pixel_values();
 481
 482         AnalogSegment::EnvelopeSection e;
 483         segment->get_envelope_section(e, start, end, samples_per_pixel);
 484
 485         if (e.length < 2)
 486                 return;
 487
 488         p.setPen(QPen(Qt::NoPen));
 489         p.setBrush(base_->color());
 490
 491         QRectF *const rects = new QRectF[e.length];
 492         QRectF *rect = rects;
 493
 494         for (uint64_t sample = 0; sample < e.length - 1; sample++) {
 495                 const float x = ((e.scale * sample + e.start) /
 496                         samples_per_pixel - pixels_offset) + left;
 497
 498                 const AnalogSegment::EnvelopeSample *const s = e.samples + sample;
 499
 500                 // We overlap this sample with the next so that vertical
 501                 // gaps do not appear during steep rising or falling edges
 502                 const float b = y - max(s->max, (s + 1)->min) * scale_;
 503                 const float t = y - min(s->min, (s + 1)->max) * scale_;
 504
 505                 float h = b - t;
 506                 if (h >= 0.0f && h <= 1.0f)
 507                         h = 1.0f;
 508                 if (h <= 0.0f && h >= -1.0f)
 509                         h = -1.0f;
 510
 511                 *rect++ = QRectF(x, t, 1.0f, h);
 512         }
 513
 514         p.drawRects(rects, e.length);
 515
 516         delete[] rects;
 517         delete[] e.samples;
 518 }
 519
 520 void AnalogSignal::paint_logic_mid(QPainter &p, ViewItemPaintParams &pp)
 521 {
 522         QLineF *line;
 523
 524         vector< pair<int64_t, bool> > edges;
 525
 526         assert(base_);
 527
 528         const int y = get_visual_y();
 529
 530         if (!base_->enabled() || !base_->logic_data())
 531                 return;
 532
 533         const int signal_margin =
 534                 QFontMetrics(QApplication::font()).height() / 2;
 535
 536         const int ph = min(pos_vdivs_, 1) * div_height_;
 537         const int nh = min(neg_vdivs_, 1) * div_height_;
 538         const float high_offset = y - ph + signal_margin + 0.5f;
 539         const float low_offset = y + nh - signal_margin - 0.5f;
 540
 541         shared_ptr<pv::data::LogicSegment> segment = get_logic_segment_to_paint();
 542         if (!segment || (segment->get_sample_count() == 0))
 543                 return;
 544
 545         double samplerate = segment->samplerate();
 546
 547         // Show sample rate as 1Hz when it is unknown
 548         if (samplerate == 0.0)
 549                 samplerate = 1.0;
 550
 551         const double pixels_offset = pp.pixels_offset();
 552         const pv::util::Timestamp& start_time = segment->start_time();
 553         const int64_t last_sample = (int64_t)segment->get_sample_count() - 1;
 554         const double samples_per_pixel = samplerate * pp.scale();
 555         const double pixels_per_sample = 1 / samples_per_pixel;
 556         const pv::util::Timestamp start = samplerate * (pp.offset() - start_time);
 557         const pv::util::Timestamp end = start + samples_per_pixel * pp.width();
 558
 559         const int64_t start_sample = min(max(floor(start).convert_to<int64_t>(),
 560                 (int64_t)0), last_sample);
 561         const uint64_t end_sample = min(max(ceil(end).convert_to<int64_t>(),
 562                 (int64_t)0), last_sample);
 563
 564         segment->get_subsampled_edges(edges, start_sample, end_sample,
 565                 samples_per_pixel / LogicSignal::Oversampling, 0);
 566         assert(edges.size() >= 2);
 567
 568         // Check whether we need to paint the sampling points
 569         GlobalSettings settings;
 570         const bool show_sampling_points =
 571                 settings.value(GlobalSettings::Key_View_ShowSamplingPoints).toBool() &&
 572                 (samples_per_pixel < 0.25);
 573
 574         vector<QRectF> sampling_points;
 575         float sampling_point_x = 0.0f;
 576         int64_t sampling_point_sample = start_sample;
 577         const int w = 2;
 578
 579         if (show_sampling_points) {
 580                 sampling_points.reserve(end_sample - start_sample + 1);
 581                 sampling_point_x = (edges.cbegin()->first / samples_per_pixel - pixels_offset) + pp.left();
 582         }
 583
 584         // Paint the edges
 585         const unsigned int edge_count = edges.size() - 2;
 586         QLineF *const edge_lines = new QLineF[edge_count];
 587         line = edge_lines;
 588
 589         for (auto i = edges.cbegin() + 1; i != edges.cend() - 1; i++) {
 590                 const float x = ((*i).first / samples_per_pixel -
 591                         pixels_offset) + pp.left();
 592                 *line++ = QLineF(x, high_offset, x, low_offset);
 593
 594                 if (show_sampling_points)
 595                         while (sampling_point_sample < (*i).first) {
 596                                 const float y = (*i).second ? low_offset : high_offset;
 597                                 sampling_points.emplace_back(
 598                                         QRectF(sampling_point_x - (w / 2), y - (w / 2), w, w));
 599                                 sampling_point_sample++;
 600                                 sampling_point_x += pixels_per_sample;
 601                         };
 602         }
 603
 604         // Calculate the sample points from the last edge to the end of the trace
 605         if (show_sampling_points)
 606                 while ((uint64_t)sampling_point_sample <= end_sample) {
 607                         // Signal changed after the last edge, so the level is inverted
 608                         const float y = (edges.cend() - 1)->second ? high_offset : low_offset;
 609                         sampling_points.emplace_back(
 610                                 QRectF(sampling_point_x - (w / 2), y - (w / 2), w, w));
 611                         sampling_point_sample++;
 612                         sampling_point_x += pixels_per_sample;
 613                 };
 614
 615         p.setPen(LogicSignal::EdgeColor);
 616         p.drawLines(edge_lines, edge_count);
 617         delete[] edge_lines;
 618
 619         // Paint the caps
 620         const unsigned int max_cap_line_count = edges.size();
 621         QLineF *const cap_lines = new QLineF[max_cap_line_count];
 622
 623         p.setPen(LogicSignal::HighColor);
 624         paint_logic_caps(p, cap_lines, edges, true, samples_per_pixel,
 625                 pixels_offset, pp.left(), high_offset);
 626         p.setPen(LogicSignal::LowColor);
 627         paint_logic_caps(p, cap_lines, edges, false, samples_per_pixel,
 628                 pixels_offset, pp.left(), low_offset);
 629
 630         delete[] cap_lines;
 631
 632         // Paint the sampling points
 633         if (show_sampling_points) {
 634                 p.setPen(SamplingPointColor);
 635                 p.drawRects(sampling_points.data(), sampling_points.size());
 636         }
 637 }
 638
 639 void AnalogSignal::paint_logic_caps(QPainter &p, QLineF *const lines,
 640         vector< pair<int64_t, bool> > &edges, bool level,
 641         double samples_per_pixel, double pixels_offset, float x_offset,
 642         float y_offset)
 643 {
 644         QLineF *line = lines;
 645
 646         for (auto i = edges.begin(); i != (edges.end() - 1); i++)
 647                 if ((*i).second == level) {
 648                         *line++ = QLineF(
 649                                 ((*i).first / samples_per_pixel -
 650                                         pixels_offset) + x_offset, y_offset,
 651                                 ((*(i+1)).first / samples_per_pixel -
 652                                         pixels_offset) + x_offset, y_offset);
 653                 }
 654
 655         p.drawLines(lines, line - lines);
 656 }
 657
 658 shared_ptr<pv::data::AnalogSegment> AnalogSignal::get_analog_segment_to_paint() const
 659 {
 660         shared_ptr<pv::data::AnalogSegment> segment;
 661
 662         const deque< shared_ptr<pv::data::AnalogSegment> > &segments =
 663                 base_->analog_data()->analog_segments();
 664
 665         if (!segments.empty()) {
 666                 if (segment_display_mode_ == ShowLastSegmentOnly)
 667                         segment = segments.back();
 668
 669                 if ((segment_display_mode_ == ShowSingleSegmentOnly) ||
 670                                 (segment_display_mode_ == ShowLastCompleteSegmentOnly)) {
 671                         try {
 672                                 segment = segments.at(current_segment_);
 673                         } catch (out_of_range&) {
 674                                 qDebug() << "Current analog segment out of range for signal" << base_->name() << ":" << current_segment_;
 675                         }
 676                 }
 677         }
 678
 679         return segment;
 680 }
 681
 682 shared_ptr<pv::data::LogicSegment> AnalogSignal::get_logic_segment_to_paint() const
 683 {
 684         shared_ptr<pv::data::LogicSegment> segment;
 685
 686         const deque< shared_ptr<pv::data::LogicSegment> > &segments =
 687                 base_->logic_data()->logic_segments();
 688
 689         if (!segments.empty()) {
 690                 if (segment_display_mode_ == ShowLastSegmentOnly)
 691                         segment = segments.back();
 692
 693                 if ((segment_display_mode_ == ShowSingleSegmentOnly) ||
 694                                 (segment_display_mode_ == ShowLastCompleteSegmentOnly)) {
 695                         try {
 696                                 segment = segments.at(current_segment_);
 697                         } catch (out_of_range&) {
 698                                 qDebug() << "Current logic segment out of range for signal" << base_->name() << ":" << current_segment_;
 699                         }
 700                 }
 701         }
 702
 703         return segment;
 704 }
 705
 706 float AnalogSignal::get_resolution(int scale_index)
 707 {
 708         const float seq[] = {1.0f, 2.0f, 5.0f};
 709
 710         const int offset = numeric_limits<int>::max() / (2 * countof(seq));
 711         const div_t d = div((int)(scale_index + countof(seq) * offset),
 712                 countof(seq));
 713
 714         return powf(10.0f, d.quot - offset) * seq[d.rem];
 715 }
 716
 717 void AnalogSignal::update_scale()
 718 {
 719         resolution_ = get_resolution(scale_index_);
 720         scale_ = div_height_ / resolution_;
 721 }
 722
 723 void AnalogSignal::update_conversion_widgets()
 724 {
 725         SignalBase::ConversionType conv_type = base_->get_conversion_type();
 726
 727         // Enable or disable widgets depending on conversion state
 728         conv_threshold_cb_->setEnabled(conv_type != SignalBase::NoConversion);
 729         display_type_cb_->setEnabled(conv_type != SignalBase::NoConversion);
 730
 731         conv_threshold_cb_->clear();
 732
 733         vector < pair<QString, int> > presets = base_->get_conversion_presets();
 734
 735         // Prevent the combo box from firing the "edit text changed" signal
 736         // as that would involuntarily select the first entry
 737         conv_threshold_cb_->blockSignals(true);
 738
 739         // Set available options depending on chosen conversion
 740         for (pair<QString, int> preset : presets)
 741                 conv_threshold_cb_->addItem(preset.first, preset.second);
 742
 743         map < QString, QVariant > options = base_->get_conversion_options();
 744
 745         if (conv_type == SignalBase::A2LConversionByThreshold) {
 746                 const vector<double> thresholds = base_->get_conversion_thresholds(
 747                                 SignalBase::A2LConversionByThreshold, true);
 748                 conv_threshold_cb_->addItem(
 749                                 QString("%1V").arg(QString::number(thresholds[0], 'f', 1)), -1);
 750         }
 751
 752         if (conv_type == SignalBase::A2LConversionBySchmittTrigger) {
 753                 const vector<double> thresholds = base_->get_conversion_thresholds(
 754                                 SignalBase::A2LConversionBySchmittTrigger, true);
 755                 conv_threshold_cb_->addItem(QString("%1V/%2V").arg(
 756                                 QString::number(thresholds[0], 'f', 1),
 757                                 QString::number(thresholds[1], 'f', 1)), -1);
 758         }
 759
 760         int preset_id = base_->get_current_conversion_preset();
 761         conv_threshold_cb_->setCurrentIndex(
 762                         conv_threshold_cb_->findData(preset_id));
 763
 764         conv_threshold_cb_->blockSignals(false);
 765 }
 766
 767 vector<data::LogicSegment::EdgePair> AnalogSignal::get_nearest_level_changes(uint64_t sample_pos)
 768 {
 769         assert(base_);
 770         assert(owner_);
 771
 772         // Return if there's no logic data or we're showing only the analog trace
 773         if (!base_->logic_data() || (display_type_ == DisplayAnalog))
 774                 return vector<data::LogicSegment::EdgePair>();
 775
 776         if (sample_pos == 0)
 777                 return vector<LogicSegment::EdgePair>();
 778
 779         shared_ptr<LogicSegment> segment = get_logic_segment_to_paint();
 780         if (!segment || (segment->get_sample_count() == 0))
 781                 return vector<LogicSegment::EdgePair>();
 782
 783         const View *view = owner_->view();
 784         assert(view);
 785         const double samples_per_pixel = base_->get_samplerate() * view->scale();
 786
 787         vector<LogicSegment::EdgePair> edges;
 788
 789         segment->get_surrounding_edges(edges, sample_pos,
 790                 samples_per_pixel / LogicSignal::Oversampling, 0);
 791
 792         if (edges.empty())
 793                 return vector<LogicSegment::EdgePair>();
 794
 795         return edges;
 796 }
 797
 798 void AnalogSignal::perform_autoranging(bool keep_divs, bool force_update)
 799 {
 800         const deque< shared_ptr<pv::data::AnalogSegment> > &segments =
 801                 base_->analog_data()->analog_segments();
 802
 803         if (segments.empty())
 804                 return;
 805
 806         static double prev_min = 0, prev_max = 0;
 807         double min = 0, max = 0;
 808
 809         for (shared_ptr<pv::data::AnalogSegment> segment : segments) {
 810                 pair<double, double> mm = segment->get_min_max();
 811                 min = std::min(min, mm.first);
 812                 max = std::max(max, mm.second);
 813         }
 814
 815         if ((min == prev_min) && (max == prev_max) && !force_update)
 816                 return;
 817
 818         prev_min = min;
 819         prev_max = max;
 820
 821         // If we're allowed to alter the div assignment...
 822         if (!keep_divs) {
 823                 // Use all divs for the positive range if there are no negative values
 824                 if ((min == 0) && (neg_vdivs_ > 0)) {
 825                         pos_vdivs_ += neg_vdivs_;
 826                         neg_vdivs_ = 0;
 827                 }
 828
 829                 // Split up the divs if there are negative values but no negative divs
 830                 if ((min < 0) && (neg_vdivs_ == 0)) {
 831                         neg_vdivs_ = pos_vdivs_ / 2;
 832                         pos_vdivs_ -= neg_vdivs_;
 833                 }
 834         }
 835
 836         // If there is still no positive div when we need it, add one
 837         // (this can happen when pos_vdivs==neg_vdivs==0)
 838         if ((max > 0) && (pos_vdivs_ == 0)) {
 839                 pos_vdivs_ = 1;
 840                 owner_->extents_changed(false, true);
 841         }
 842
 843         // If there is still no negative div when we need it, add one
 844         // (this can happen when pos_vdivs was 0 or 1 when trying to split)
 845         if ((min < 0) && (neg_vdivs_ == 0)) {
 846                 neg_vdivs_ = 1;
 847                 owner_->extents_changed(false, true);
 848         }
 849
 850         double min_value_per_div;
 851         if ((pos_vdivs_ > 0) && (neg_vdivs_ >  0))
 852                 min_value_per_div = std::max(max / pos_vdivs_, -min / neg_vdivs_);
 853         else if (pos_vdivs_ > 0)
 854                 min_value_per_div = max / pos_vdivs_;
 855         else
 856                 min_value_per_div = -min / neg_vdivs_;
 857
 858         // Find first scale value that is bigger than the value we need
 859         for (int i = MinScaleIndex; i < MaxScaleIndex; i++)
 860                 if (get_resolution(i) > min_value_per_div) {
 861                         scale_index_ = i;
 862                         break;
 863                 }
 864
 865         update_scale();
 866 }
 867
 868 void AnalogSignal::reset_pixel_values()
 869 {
 870         value_at_pixel_pos_.clear();
 871         current_pixel_pos_ = -1;
 872         prev_value_at_pixel_ = std::numeric_limits<float>::quiet_NaN();
 873 }
 874
 875 void AnalogSignal::process_next_sample_value(float x, float value)
 876 {
 877         // Note: NAN is used to indicate the non-existance of a value at this pixel
 878
 879         if (std::isnan(prev_value_at_pixel_)) {
 880                 if (x < 0) {
 881                         min_value_at_pixel_ = value;
 882                         max_value_at_pixel_ = value;
 883                         prev_value_at_pixel_ = value;
 884                         current_pixel_pos_ = x;
 885                 } else
 886                         prev_value_at_pixel_ = std::numeric_limits<float>::quiet_NaN();
 887         }
 888
 889         const int pixel_pos = (int)(x + 0.5);
 890
 891         if (pixel_pos > current_pixel_pos_) {
 892                 if (pixel_pos - current_pixel_pos_ == 1) {
 893                         if (std::isnan(prev_value_at_pixel_)) {
 894                                 value_at_pixel_pos_.push_back(prev_value_at_pixel_);
 895                         } else {
 896                                 // Average the min/max range to create one value for the previous pixel
 897                                 const float avg = (min_value_at_pixel_ + max_value_at_pixel_) / 2;
 898                                 value_at_pixel_pos_.push_back(avg);
 899                         }
 900                 } else {
 901                         // Interpolate values to create values for the intermediate pixels
 902                         const float start_value = prev_value_at_pixel_;
 903                         const float end_value = value;
 904                         const int steps = fabs(pixel_pos - current_pixel_pos_);
 905                         const double gradient = (end_value - start_value) / steps;
 906                         for (int i = 0; i < steps; i++) {
 907                                 if (current_pixel_pos_ + i < 0)
 908                                         continue;
 909                                 value_at_pixel_pos_.push_back(start_value + i * gradient);
 910                         }
 911                 }
 912
 913                 min_value_at_pixel_ = value;
 914                 max_value_at_pixel_ = value;
 915                 prev_value_at_pixel_ = value;
 916                 current_pixel_pos_ = pixel_pos;
 917         } else {
 918                 // Another sample for the same pixel
 919                 if (value < min_value_at_pixel_)
 920                         min_value_at_pixel_ = value;
 921                 if (value > max_value_at_pixel_)
 922                         max_value_at_pixel_ = value;
 923         }
 924 }
 925
 926 void AnalogSignal::populate_popup_form(QWidget *parent, QFormLayout *form)
 927 {
 928         // Add the standard options
 929         Signal::populate_popup_form(parent, form);
 930
 931         QFormLayout *const layout = new QFormLayout;
 932
 933         // Add div-related settings
 934         pvdiv_sb_ = new QSpinBox(parent);
 935         pvdiv_sb_->setRange(0, MaximumVDivs);
 936         pvdiv_sb_->setValue(pos_vdivs_);
 937         connect(pvdiv_sb_, SIGNAL(valueChanged(int)),
 938                 this, SLOT(on_pos_vdivs_changed(int)));
 939         layout->addRow(tr("Number of pos vertical divs"), pvdiv_sb_);
 940
 941         nvdiv_sb_ = new QSpinBox(parent);
 942         nvdiv_sb_->setRange(0, MaximumVDivs);
 943         nvdiv_sb_->setValue(neg_vdivs_);
 944         connect(nvdiv_sb_, SIGNAL(valueChanged(int)),
 945                 this, SLOT(on_neg_vdivs_changed(int)));
 946         layout->addRow(tr("Number of neg vertical divs"), nvdiv_sb_);
 947
 948         div_height_sb_ = new QSpinBox(parent);
 949         div_height_sb_->setRange(20, 1000);
 950         div_height_sb_->setSingleStep(5);
 951         div_height_sb_->setSuffix(tr(" pixels"));
 952         div_height_sb_->setValue(div_height_);
 953         connect(div_height_sb_, SIGNAL(valueChanged(int)),
 954                 this, SLOT(on_div_height_changed(int)));
 955         layout->addRow(tr("Div height"), div_height_sb_);
 956
 957         // Add the vertical resolution
 958         resolution_cb_ = new QComboBox(parent);
 959
 960         for (int i = MinScaleIndex; i < MaxScaleIndex; i++) {
 961                 const QString label = QString("%1").arg(get_resolution(i));
 962                 resolution_cb_->insertItem(0, label, QVariant(i));
 963         }
 964
 965         int cur_idx = resolution_cb_->findData(QVariant(scale_index_));
 966         resolution_cb_->setCurrentIndex(cur_idx);
 967
 968         connect(resolution_cb_, SIGNAL(currentIndexChanged(int)),
 969                 this, SLOT(on_resolution_changed(int)));
 970
 971         QGridLayout *const vdiv_layout = new QGridLayout;
 972         QLabel *const vdiv_unit = new QLabel(tr("V/div"));
 973         vdiv_layout->addWidget(resolution_cb_, 0, 0);
 974         vdiv_layout->addWidget(vdiv_unit, 0, 1);
 975
 976         layout->addRow(tr("Vertical resolution"), vdiv_layout);
 977
 978         // Add the autoranging checkbox
 979         QCheckBox* autoranging_cb = new QCheckBox();
 980         autoranging_cb->setCheckState(autoranging_ ? Qt::Checked : Qt::Unchecked);
 981
 982         connect(autoranging_cb, SIGNAL(stateChanged(int)),
 983                 this, SLOT(on_autoranging_changed(int)));
 984
 985         layout->addRow(tr("Autoranging"), autoranging_cb);
 986
 987         // Add the conversion type dropdown
 988         conversion_cb_ = new QComboBox();
 989
 990         conversion_cb_->addItem(tr("none"),
 991                 SignalBase::NoConversion);
 992         conversion_cb_->addItem(tr("to logic via threshold"),
 993                 SignalBase::A2LConversionByThreshold);
 994         conversion_cb_->addItem(tr("to logic via schmitt-trigger"),
 995                 SignalBase::A2LConversionBySchmittTrigger);
 996
 997         cur_idx = conversion_cb_->findData(QVariant(base_->get_conversion_type()));
 998         conversion_cb_->setCurrentIndex(cur_idx);
 999
1000         layout->addRow(tr("Conversion"), conversion_cb_);
1001
1002         connect(conversion_cb_, SIGNAL(currentIndexChanged(int)),
1003                 this, SLOT(on_conversion_changed(int)));
1004
1005     // Add the conversion threshold settings
1006     conv_threshold_cb_ = new QComboBox();
1007     conv_threshold_cb_->setEditable(true);
1008
1009     layout->addRow(tr("Conversion threshold(s)"), conv_threshold_cb_);
1010
1011     connect(conv_threshold_cb_, SIGNAL(currentIndexChanged(int)),
1012             this, SLOT(on_conv_threshold_changed(int)));
1013     connect(conv_threshold_cb_, SIGNAL(editTextChanged(const QString&)),
1014             this, SLOT(on_conv_threshold_changed()));  // index will be -1
1015
1016         // Add the display type dropdown
1017         display_type_cb_ = new QComboBox();
1018
1019         display_type_cb_->addItem(tr("analog"), DisplayAnalog);
1020         display_type_cb_->addItem(tr("converted"), DisplayConverted);
1021         display_type_cb_->addItem(tr("analog+converted"), DisplayBoth);
1022
1023         cur_idx = display_type_cb_->findData(QVariant(display_type_));
1024         display_type_cb_->setCurrentIndex(cur_idx);
1025
1026         layout->addRow(tr("Show traces for"), display_type_cb_);
1027
1028         connect(display_type_cb_, SIGNAL(currentIndexChanged(int)),
1029                 this, SLOT(on_display_type_changed(int)));
1030
1031         // Update the conversion widget contents and states
1032         update_conversion_widgets();
1033
1034         form->addRow(layout);
1035 }
1036
1037 void AnalogSignal::hover_point_changed(const QPoint &hp)
1038 {
1039         Signal::hover_point_changed(hp);
1040
1041         // Note: Even though the view area begins at 0, we exclude 0 because
1042         // that's also the value given when the cursor is over the header to the
1043         // left of the trace paint area
1044         if (hp.x() <= 0) {
1045                 value_at_hover_pos_ = std::numeric_limits<float>::quiet_NaN();
1046         } else {
1047                 try {
1048                         value_at_hover_pos_ = value_at_pixel_pos_.at(hp.x());
1049                 } catch (out_of_range&) {
1050                         value_at_hover_pos_ = std::numeric_limits<float>::quiet_NaN();
1051                 }
1052         }
1053 }
1054
1055 void AnalogSignal::on_min_max_changed(float min, float max)
1056 {
1057         (void)min;
1058         (void)max;
1059
1060         if (autoranging_)
1061                 perform_autoranging(false, false);
1062 }
1063
1064 void AnalogSignal::on_pos_vdivs_changed(int vdivs)
1065 {
1066         if (vdivs == pos_vdivs_)
1067                 return;
1068
1069         pos_vdivs_ = vdivs;
1070
1071         // There has to be at least one div, positive or negative
1072         if ((neg_vdivs_ == 0) && (pos_vdivs_ == 0)) {
1073                 pos_vdivs_ = 1;
1074                 if (pvdiv_sb_)
1075                         pvdiv_sb_->setValue(pos_vdivs_);
1076         }
1077
1078         if (autoranging_) {
1079                 perform_autoranging(true, true);
1080
1081                 // It could be that a positive or negative div was added, so update
1082                 if (pvdiv_sb_) {
1083                         pvdiv_sb_->setValue(pos_vdivs_);
1084                         nvdiv_sb_->setValue(neg_vdivs_);
1085                 }
1086         }
1087
1088         if (owner_) {
1089                 // Call order is important, otherwise the lazy event handler won't work
1090                 owner_->extents_changed(false, true);
1091                 owner_->row_item_appearance_changed(false, true);
1092         }
1093 }
1094
1095 void AnalogSignal::on_neg_vdivs_changed(int vdivs)
1096 {
1097         if (vdivs == neg_vdivs_)
1098                 return;
1099
1100         neg_vdivs_ = vdivs;
1101
1102         // There has to be at least one div, positive or negative
1103         if ((neg_vdivs_ == 0) && (pos_vdivs_ == 0)) {
1104                 pos_vdivs_ = 1;
1105                 if (pvdiv_sb_)
1106                         pvdiv_sb_->setValue(pos_vdivs_);
1107         }
1108
1109         if (autoranging_) {
1110                 perform_autoranging(true, true);
1111
1112                 // It could be that a positive or negative div was added, so update
1113                 if (pvdiv_sb_) {
1114                         pvdiv_sb_->setValue(pos_vdivs_);
1115                         nvdiv_sb_->setValue(neg_vdivs_);
1116                 }
1117         }
1118
1119         if (owner_) {
1120                 // Call order is important, otherwise the lazy event handler won't work
1121                 owner_->extents_changed(false, true);
1122                 owner_->row_item_appearance_changed(false, true);
1123         }
1124 }
1125
1126 void AnalogSignal::on_div_height_changed(int height)
1127 {
1128         div_height_ = height;
1129         update_scale();
1130
1131         if (owner_) {
1132                 // Call order is important, otherwise the lazy event handler won't work
1133                 owner_->extents_changed(false, true);
1134                 owner_->row_item_appearance_changed(false, true);
1135         }
1136 }
1137
1138 void AnalogSignal::on_resolution_changed(int index)
1139 {
1140         scale_index_ = resolution_cb_->itemData(index).toInt();
1141         update_scale();
1142
1143         if (owner_)
1144                 owner_->row_item_appearance_changed(false, true);
1145 }
1146
1147 void AnalogSignal::on_autoranging_changed(int state)
1148 {
1149         autoranging_ = (state == Qt::Checked);
1150
1151         if (autoranging_)
1152                 perform_autoranging(false, true);
1153
1154         if (owner_) {
1155                 // Call order is important, otherwise the lazy event handler won't work
1156                 owner_->extents_changed(false, true);
1157                 owner_->row_item_appearance_changed(false, true);
1158         }
1159 }
1160
1161 void AnalogSignal::on_conversion_changed(int index)
1162 {
1163         SignalBase::ConversionType old_conv_type = base_->get_conversion_type();
1164
1165         SignalBase::ConversionType conv_type =
1166                 (SignalBase::ConversionType)(conversion_cb_->itemData(index).toInt());
1167
1168         if (conv_type != old_conv_type) {
1169                 base_->set_conversion_type(conv_type);
1170                 update_conversion_widgets();
1171
1172                 if (owner_)
1173                         owner_->row_item_appearance_changed(false, true);
1174         }
1175 }
1176
1177 void AnalogSignal::on_conv_threshold_changed(int index)
1178 {
1179         SignalBase::ConversionType conv_type = base_->get_conversion_type();
1180
1181         // Note: index is set to -1 if the text in the combo box matches none of
1182         // the entries in the combo box
1183
1184         if ((index == -1) && (conv_threshold_cb_->currentText().length() == 0))
1185                 return;
1186
1187         // The combo box entry with the custom value has user_data set to -1
1188         const int user_data = conv_threshold_cb_->findText(
1189                         conv_threshold_cb_->currentText());
1190
1191         const bool use_custom_thr = (index == -1) || (user_data == -1);
1192
1193         if (conv_type == SignalBase::A2LConversionByThreshold && use_custom_thr) {
1194                 // Not one of the preset values, try to parse the combo box text
1195                 // Note: Regex loosely based on
1196                 // https://txt2re.com/index-c++.php3?s=0.1V&1&-13
1197                 QString re1 = "([+-]?\\d*[\\.,]?\\d*)"; // Float value
1198                 QString re2 = "([a-zA-Z]*)"; // SI unit
1199                 QRegExp regex(re1 + re2);
1200
1201                 const QString text = conv_threshold_cb_->currentText();
1202                 if (!regex.exactMatch(text))
1203                         return;  // String doesn't match the regex
1204
1205                 QStringList tokens = regex.capturedTexts();
1206
1207                 // For now, we simply assume that the unit is volt without modifiers
1208                 const double thr = tokens.at(1).toDouble();
1209
1210                 // Only restart the conversion if the threshold was updated.
1211                 // We're starting a delayed conversion because the user may still be
1212                 // typing and the UI would lag if we kept on restarting it immediately
1213                 if (base_->set_conversion_option("threshold_value", thr))
1214                         base_->start_conversion(true);
1215         }
1216
1217         if (conv_type == SignalBase::A2LConversionBySchmittTrigger && use_custom_thr) {
1218                 // Not one of the preset values, try to parse the combo box text
1219                 // Note: Regex loosely based on
1220                 // https://txt2re.com/index-c++.php3?s=0.1V/0.2V&2&14&-22&3&15
1221                 QString re1 = "([+-]?\\d*[\\.,]?\\d*)"; // Float value
1222                 QString re2 = "([a-zA-Z]*)"; // SI unit
1223                 QString re3 = "\\/"; // Forward slash, not captured
1224                 QString re4 = "([+-]?\\d*[\\.,]?\\d*)"; // Float value
1225                 QString re5 = "([a-zA-Z]*)"; // SI unit
1226                 QRegExp regex(re1 + re2 + re3 + re4 + re5);
1227
1228                 const QString text = conv_threshold_cb_->currentText();
1229                 if (!regex.exactMatch(text))
1230                         return;  // String doesn't match the regex
1231
1232                 QStringList tokens = regex.capturedTexts();
1233
1234                 // For now, we simply assume that the unit is volt without modifiers
1235                 const double low_thr = tokens.at(1).toDouble();
1236                 const double high_thr = tokens.at(3).toDouble();
1237
1238                 // Only restart the conversion if one of the options was updated.
1239                 // We're starting a delayed conversion because the user may still be
1240                 // typing and the UI would lag if we kept on restarting it immediately
1241                 bool o1 = base_->set_conversion_option("threshold_value_low", low_thr);
1242                 bool o2 = base_->set_conversion_option("threshold_value_high", high_thr);
1243                 if (o1 || o2)
1244                         base_->start_conversion(true);  // Start delayed conversion
1245         }
1246
1247         base_->set_conversion_preset((SignalBase::ConversionPreset)index);
1248
1249         // Immediately start the conversion if we're not using custom values
1250         // (i.e. we're using one of the presets)
1251         if (!use_custom_thr)
1252                 base_->start_conversion();
1253 }
1254
1255 void AnalogSignal::on_delayed_conversion_starter()
1256 {
1257         base_->start_conversion();
1258 }
1259
1260 void AnalogSignal::on_display_type_changed(int index)
1261 {
1262         display_type_ = (DisplayType)(display_type_cb_->itemData(index).toInt());
1263
1264         if (owner_)
1265                 owner_->row_item_appearance_changed(false, true);
1266 }
1267
1268 void AnalogSignal::on_settingViewConversionThresholdDispMode_changed(const QVariant new_value)
1269 {
1270         conversion_threshold_disp_mode_ = new_value.toInt();
1271
1272         if (owner_)
1273                 owner_->row_item_appearance_changed(false, true);
1274 }
1275
1276 } // namespace trace
1277 } // namespace views
1278 } // namespace pv