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