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