pv/views/trace/analogsignal.cpp

   1 /*
   2  * This file is part of the PulseView project.
   3  *
   4  * Copyright (C) 2012 Joel Holdsworth <joel@airwebreathe.org.uk>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 #include <extdef.h>
  21
  22 #include <cassert>
  23 #include <cmath>
  24 #include <cstdlib>
  25 #include <limits>
  26 #include <vector>
  27
  28 #include <QApplication>
  29 #include <QCheckBox>
  30 #include <QComboBox>
  31 #include <QDebug>
  32 #include <QFormLayout>
  33 #include <QGridLayout>
  34 #include <QLabel>
  35 #include <QString>
  36
  37 #include "analogsignal.hpp"
  38 #include "logicsignal.hpp"
  39 #include "view.hpp"
  40
  41 #include "pv/util.hpp"
  42 #include "pv/data/analog.hpp"
  43 #include "pv/data/analogsegment.hpp"
  44 #include "pv/data/logic.hpp"
  45 #include "pv/data/logicsegment.hpp"
  46 #include "pv/data/signalbase.hpp"
  47 #include "pv/globalsettings.hpp"
  48
  49 #include <libsigrokcxx/libsigrokcxx.hpp>
  50
  51 using std::deque;
  52 using std::div;
  53 using std::div_t;
  54 // Note that "using std::isnan;" is _not_ put here since that would break
  55 // compilation on some platforms. Use "std::isnan()" instead in checks below.
  56 using std::max;
  57 using std::make_pair;
  58 using std::min;
  59 using std::numeric_limits;
  60 using std::out_of_range;
  61 using std::pair;
  62 using std::shared_ptr;
  63 using std::vector;
  64
  65 using pv::data::LogicSegment;
  66 using pv::data::SignalBase;
  67 using pv::util::SIPrefix;
  68
  69 namespace pv {
  70 namespace views {
  71 namespace trace {
  72
  73 const QColor AnalogSignal::SignalColors[4] = {
  74         QColor(0xC4, 0xA0, 0x00),       // Yellow
  75         QColor(0x87, 0x20, 0x7A),       // Magenta
  76         QColor(0x20, 0x4A, 0x87),       // Blue
  77         QColor(0x4E, 0x9A, 0x06)        // Green
  78 };
  79
  80 const QPen AnalogSignal::AxisPen(QColor(0, 0, 0, 30 * 256 / 100), 2);
  81 const QColor AnalogSignal::GridMajorColor = QColor(0, 0, 0, 40 * 256 / 100);
  82 const QColor AnalogSignal::GridMinorColor = QColor(0, 0, 0, 20 * 256 / 100);
  83
  84 const QColor AnalogSignal::SamplingPointColor(0x77, 0x77, 0x77);
  85 const QColor AnalogSignal::SamplingPointColorLo = QColor(200, 0, 0, 80 * 256 / 100);
  86 const QColor AnalogSignal::SamplingPointColorNe = QColor(0,   0, 0, 80 * 256 / 100);
  87 const QColor AnalogSignal::SamplingPointColorHi = QColor(0, 200, 0, 80 * 256 / 100);
  88
  89 const QColor AnalogSignal::ThresholdColor = QColor(0, 0, 0, 30 * 256 / 100);
  90 const QColor AnalogSignal::ThresholdColorLo = QColor(255, 0, 0, 8 * 256 / 100);
  91 const QColor AnalogSignal::ThresholdColorNe = QColor(0,   0, 0, 10 * 256 / 100);
  92 const QColor AnalogSignal::ThresholdColorHi = QColor(0, 255, 0, 8 * 256 / 100);
  93
  94 const int64_t AnalogSignal::TracePaintBlockSize = 1024 * 1024;  // 4 MiB (due to float)
  95 const float AnalogSignal::EnvelopeThreshold = 64.0f;
  96
  97 const int AnalogSignal::MaximumVDivs = 10;
  98 const int AnalogSignal::MinScaleIndex = -6;
  99 const int AnalogSignal::MaxScaleIndex = 7;
 100
 101 const int AnalogSignal::InfoTextMarginRight = 20;
 102 const int AnalogSignal::InfoTextMarginBottom = 5;
 103
 104 AnalogSignal::AnalogSignal(
 105         pv::Session &session,
 106         shared_ptr<data::SignalBase> base) :
 107         Signal(session, base),
 108         scale_index_(4), // 20 per div
 109         pos_vdivs_(1),
 110         neg_vdivs_(1),
 111         resolution_(0),
 112         display_type_(DisplayBoth),
 113         autoranging_(true),
 114         value_at_hover_pos_(std::numeric_limits<float>::quiet_NaN())
 115 {
 116         axis_pen_ = AxisPen;
 117
 118         pv::data::Analog* analog_data =
 119                 dynamic_cast<pv::data::Analog*>(data().get());
 120
 121         connect(analog_data, SIGNAL(min_max_changed(float, float)),
 122                 this, SLOT(on_min_max_changed(float, float)));
 123
 124         GlobalSettings settings;
 125         show_sampling_points_ =
 126                 settings.value(GlobalSettings::Key_View_ShowSamplingPoints).toBool();
 127         fill_high_areas_ =
 128                 settings.value(GlobalSettings::Key_View_FillSignalHighAreas).toBool();
 129         high_fill_color_ = QColor::fromRgba(settings.value(
 130                 GlobalSettings::Key_View_FillSignalHighAreaColor).value<uint32_t>());
 131         show_analog_minor_grid_ =
 132                 settings.value(GlobalSettings::Key_View_ShowAnalogMinorGrid).toBool();
 133         conversion_threshold_disp_mode_ =
 134                 settings.value(GlobalSettings::Key_View_ConversionThresholdDispMode).toInt();
 135         div_height_ = settings.value(GlobalSettings::Key_View_DefaultDivHeight).toInt();
 136
 137         base_->set_color(SignalColors[base_->index() % countof(SignalColors)]);
 138         update_scale();
 139 }
 140
 141 shared_ptr<pv::data::SignalData> AnalogSignal::data() const
 142 {
 143         return base_->analog_data();
 144 }
 145
 146 void AnalogSignal::save_settings(QSettings &settings) const
 147 {
 148         settings.setValue("pos_vdivs", pos_vdivs_);
 149         settings.setValue("neg_vdivs", neg_vdivs_);
 150         settings.setValue("scale_index", scale_index_);
 151         settings.setValue("display_type", display_type_);
 152         settings.setValue("autoranging", autoranging_);
 153         settings.setValue("div_height", div_height_);
 154 }
 155
 156 void AnalogSignal::restore_settings(QSettings &settings)
 157 {
 158         if (settings.contains("pos_vdivs"))
 159                 pos_vdivs_ = settings.value("pos_vdivs").toInt();
 160
 161         if (settings.contains("neg_vdivs"))
 162                 neg_vdivs_ = settings.value("neg_vdivs").toInt();
 163
 164         if (settings.contains("scale_index")) {
 165                 scale_index_ = settings.value("scale_index").toInt();
 166                 update_scale();
 167         }
 168
 169         if (settings.contains("display_type"))
 170                 display_type_ = (DisplayType)(settings.value("display_type").toInt());
 171
 172         if (settings.contains("autoranging"))
 173                 autoranging_ = settings.value("autoranging").toBool();
 174
 175         if (settings.contains("div_height")) {
 176                 const int old_height = div_height_;
 177                 div_height_ = settings.value("div_height").toInt();
 178
 179                 if ((div_height_ != old_height) && owner_) {
 180                         // Call order is important, otherwise the lazy event handler won't work
 181                         owner_->extents_changed(false, true);
 182                         owner_->row_item_appearance_changed(false, true);
 183                 }
 184         }
 185 }
 186
 187 pair<int, int> AnalogSignal::v_extents() const
 188 {
 189         const int ph = pos_vdivs_ * div_height_;
 190         const int nh = neg_vdivs_ * div_height_;
 191         return make_pair(-ph, nh);
 192 }
 193
 194 void AnalogSignal::paint_back(QPainter &p, ViewItemPaintParams &pp)
 195 {
 196         if (!base_->enabled())
 197                 return;
 198
 199         bool paint_thr_bg =
 200                 conversion_threshold_disp_mode_ == GlobalSettings::ConvThrDispMode_Background;
 201
 202         const vector<double> thresholds = base_->get_conversion_thresholds();
 203
 204         // Only display thresholds if we have some and we show analog samples
 205         if ((thresholds.size() > 0) && paint_thr_bg &&
 206                 ((display_type_ == DisplayAnalog) || (display_type_ == DisplayBoth))) {
 207
 208                 const int visual_y = get_visual_y();
 209                 const pair<int, int> extents = v_extents();
 210                 const int top = visual_y + extents.first;
 211                 const int btm = visual_y + extents.second;
 212
 213                 // Draw high/neutral/low areas
 214                 if (thresholds.size() == 2) {
 215                         int thr_lo = visual_y - thresholds[0] * scale_;
 216                         int thr_hi = visual_y - thresholds[1] * scale_;
 217                         thr_lo = min(max(thr_lo, top), btm);
 218                         thr_hi = min(max(thr_hi, top), btm);
 219
 220                         p.fillRect(QRectF(pp.left(), top, pp.width(), thr_hi - top),
 221                                 QBrush(ThresholdColorHi));
 222                         p.fillRect(QRectF(pp.left(), thr_hi, pp.width(), thr_lo - thr_hi),
 223                                 QBrush(ThresholdColorNe));
 224                         p.fillRect(QRectF(pp.left(), thr_lo, pp.width(), btm - thr_lo),
 225                                 QBrush(ThresholdColorLo));
 226                 } else {
 227                         int thr = visual_y - thresholds[0] * scale_;
 228                         thr = min(max(thr, top), btm);
 229
 230                         p.fillRect(QRectF(pp.left(), top, pp.width(), thr - top),
 231                                 QBrush(ThresholdColorHi));
 232                         p.fillRect(QRectF(pp.left(), thr, pp.width(), btm - thr),
 233                                 QBrush(ThresholdColorLo));
 234                 }
 235
 236                 paint_axis(p, pp, get_visual_y());
 237         } else {
 238                 Signal::paint_back(p, pp);
 239                 paint_axis(p, pp, get_visual_y());
 240         }
 241 }
 242
 243 void AnalogSignal::paint_mid(QPainter &p, ViewItemPaintParams &pp)
 244 {
 245         assert(base_->analog_data());
 246         assert(owner_);
 247
 248         const int y = get_visual_y();
 249
 250         if (!base_->enabled())
 251                 return;
 252
 253         if ((display_type_ == DisplayAnalog) || (display_type_ == DisplayBoth)) {
 254                 paint_grid(p, y, pp.left(), pp.right());
 255
 256                 shared_ptr<pv::data::AnalogSegment> segment = get_analog_segment_to_paint();
 257                 if (!segment || (segment->get_sample_count() == 0))
 258                         return;
 259
 260                 const double pixels_offset = pp.pixels_offset();
 261                 const double samplerate = max(1.0, segment->samplerate());
 262                 const pv::util::Timestamp& start_time = segment->start_time();
 263                 const int64_t last_sample = (int64_t)segment->get_sample_count() - 1;
 264                 const double samples_per_pixel = samplerate * pp.scale();
 265                 const pv::util::Timestamp start = samplerate * (pp.offset() - start_time);
 266                 const pv::util::Timestamp end = start + samples_per_pixel * pp.width();
 267
 268                 const int64_t start_sample = min(max(floor(start).convert_to<int64_t>(),
 269                         (int64_t)0), last_sample);
 270                 const int64_t end_sample = min(max((ceil(end) + 1).convert_to<int64_t>(),
 271                         (int64_t)0), last_sample);
 272
 273                 if (samples_per_pixel < EnvelopeThreshold)
 274                         paint_trace(p, segment, y, pp.left(), start_sample, end_sample,
 275                                 pixels_offset, samples_per_pixel);
 276                 else
 277                         paint_envelope(p, segment, y, pp.left(), start_sample, end_sample,
 278                                 pixels_offset, samples_per_pixel);
 279         }
 280
 281         if ((display_type_ == DisplayConverted) || (display_type_ == DisplayBoth))
 282                 paint_logic_mid(p, pp);
 283 }
 284
 285 void AnalogSignal::paint_fore(QPainter &p, ViewItemPaintParams &pp)
 286 {
 287         if (!enabled())
 288                 return;
 289
 290         if ((display_type_ == DisplayAnalog) || (display_type_ == DisplayBoth)) {
 291                 const int y = get_visual_y();
 292
 293                 QString infotext;
 294
 295                 // Show the info section on the right side of the trace, including
 296                 // the value at the hover point when the hover marker is enabled
 297                 // and we have corresponding data available
 298                 if (show_hover_marker_ && !std::isnan(value_at_hover_pos_)) {
 299                         infotext = QString("[%1] %2 V/div")
 300                                 .arg(format_value_si(value_at_hover_pos_, SIPrefix::unspecified, 2, "V", false))
 301                                 .arg(resolution_);
 302                 } else
 303                         infotext = QString("%1 V/div").arg(resolution_);
 304
 305                 p.setPen(base_->color());
 306                 p.setFont(QApplication::font());
 307
 308                 const QRectF bounding_rect = QRectF(pp.left(),
 309                                 y + v_extents().first,
 310                                 pp.width() - InfoTextMarginRight,
 311                                 v_extents().second - v_extents().first - InfoTextMarginBottom);
 312
 313                 p.drawText(bounding_rect, Qt::AlignRight | Qt::AlignBottom, infotext);
 314         }
 315
 316         if (show_hover_marker_)
 317                 paint_hover_marker(p);
 318 }
 319
 320 void AnalogSignal::paint_grid(QPainter &p, int y, int left, int right)
 321 {
 322         bool was_antialiased = p.testRenderHint(QPainter::Antialiasing);
 323         p.setRenderHint(QPainter::Antialiasing, false);
 324
 325         if (pos_vdivs_ > 0) {
 326                 p.setPen(QPen(GridMajorColor, 1, Qt::DashLine));
 327                 for (int i = 1; i <= pos_vdivs_; i++) {
 328                         const float dy = i * div_height_;
 329                         p.drawLine(QLineF(left, y - dy, right, y - dy));
 330                 }
 331         }
 332
 333         if ((pos_vdivs_ > 0) && show_analog_minor_grid_) {
 334                 p.setPen(QPen(GridMinorColor, 1, Qt::DashLine));
 335                 for (int i = 0; i < pos_vdivs_; i++) {
 336                         const float dy = i * div_height_;
 337                         const float dy25 = dy + (0.25 * div_height_);
 338                         const float dy50 = dy + (0.50 * div_height_);
 339                         const float dy75 = dy + (0.75 * div_height_);
 340                         p.drawLine(QLineF(left, y - dy25, right, y - dy25));
 341                         p.drawLine(QLineF(left, y - dy50, right, y - dy50));
 342                         p.drawLine(QLineF(left, y - dy75, right, y - dy75));
 343                 }
 344         }
 345
 346         if (neg_vdivs_ > 0) {
 347                 p.setPen(QPen(GridMajorColor, 1, Qt::DashLine));
 348                 for (int i = 1; i <= neg_vdivs_; i++) {
 349                         const float dy = i * div_height_;
 350                         p.drawLine(QLineF(left, y + dy, right, y + dy));
 351                 }
 352         }
 353
 354         if ((pos_vdivs_ > 0) && show_analog_minor_grid_) {
 355                 p.setPen(QPen(GridMinorColor, 1, Qt::DashLine));
 356                 for (int i = 0; i < neg_vdivs_; i++) {
 357                         const float dy = i * div_height_;
 358                         const float dy25 = dy + (0.25 * div_height_);
 359                         const float dy50 = dy + (0.50 * div_height_);
 360                         const float dy75 = dy + (0.75 * div_height_);
 361                         p.drawLine(QLineF(left, y + dy25, right, y + dy25));
 362                         p.drawLine(QLineF(left, y + dy50, right, y + dy50));
 363                         p.drawLine(QLineF(left, y + dy75, right, y + dy75));
 364                 }
 365         }
 366
 367         p.setRenderHint(QPainter::Antialiasing, was_antialiased);
 368 }
 369
 370 void AnalogSignal::paint_trace(QPainter &p,
 371         const shared_ptr<pv::data::AnalogSegment> &segment,
 372         int y, int left, const int64_t start, const int64_t end,
 373         const double pixels_offset, const double samples_per_pixel)
 374 {
 375         if (end <= start)
 376                 return;
 377
 378         bool paint_thr_dots =
 379                 (base_->get_conversion_type() != data::SignalBase::NoConversion) &&
 380                 (conversion_threshold_disp_mode_ == GlobalSettings::ConvThrDispMode_Dots);
 381
 382         vector<double> thresholds;
 383         if (paint_thr_dots)
 384                 thresholds = base_->get_conversion_thresholds();
 385
 386         // Calculate and paint the sampling points if enabled and useful
 387         GlobalSettings settings;
 388         const bool show_sampling_points =
 389                 (show_sampling_points_ || paint_thr_dots) && (samples_per_pixel < 0.25);
 390
 391         p.setPen(base_->color());
 392
 393         const int64_t points_count = end - start + 1;
 394
 395         QPointF *points = new QPointF[points_count];
 396         QPointF *point = points;
 397
 398         vector<QRectF> sampling_points[3];
 399
 400         int64_t sample_count = min(points_count, TracePaintBlockSize);
 401         int64_t block_sample = 0;
 402         float *sample_block = new float[TracePaintBlockSize];
 403         segment->get_samples(start, start + sample_count, sample_block);
 404
 405         if (show_hover_marker_)
 406                 reset_pixel_values();
 407
 408         const int w = 2;
 409         for (int64_t sample = start; sample <= end; sample++, block_sample++) {
 410
 411                 // Fetch next block of samples if we finished the current one
 412                 if (block_sample == TracePaintBlockSize) {
 413                         block_sample = 0;
 414                         sample_count = min(points_count - sample, TracePaintBlockSize);
 415                         segment->get_samples(sample, sample + sample_count, sample_block);
 416                 }
 417
 418                 const float abs_x = sample / samples_per_pixel - pixels_offset;
 419                 const float x = left + abs_x;
 420
 421                 *point++ = QPointF(x, y - sample_block[block_sample] * scale_);
 422
 423                 // Generate the pixel<->value lookup table for the mouse hover
 424                 if (show_hover_marker_)
 425                         process_next_sample_value(abs_x, sample_block[block_sample]);
 426
 427                 // Create the sampling points if needed
 428                 if (show_sampling_points) {
 429                         int idx = 0;  // Neutral
 430
 431                         if (paint_thr_dots) {
 432                                 if (thresholds.size() == 1)
 433                                         idx = (sample_block[block_sample] >= thresholds[0]) ? 2 : 1;
 434                                 else if (thresholds.size() == 2) {
 435                                         if (sample_block[block_sample] > thresholds[1])
 436                                                 idx = 2;  // High
 437                                         else if (sample_block[block_sample] < thresholds[0])
 438                                                 idx = 1;  // Low
 439                                 }
 440                         }
 441
 442                         sampling_points[idx].emplace_back(x - (w / 2), y - sample_block[block_sample] * scale_ - (w / 2), w, w);
 443                 }
 444         }
 445         delete[] sample_block;
 446
 447         p.drawPolyline(points, points_count);
 448
 449         if (show_sampling_points) {
 450                 if (paint_thr_dots) {
 451                         p.setPen(SamplingPointColorNe);
 452                         p.drawRects(sampling_points[0].data(), sampling_points[0].size());
 453                         p.setPen(SamplingPointColorLo);
 454                         p.drawRects(sampling_points[1].data(), sampling_points[1].size());
 455                         p.setPen(SamplingPointColorHi);
 456                         p.drawRects(sampling_points[2].data(), sampling_points[2].size());
 457                 } else {
 458                         p.setPen(SamplingPointColor);
 459                         p.drawRects(sampling_points[0].data(), sampling_points[0].size());
 460                 }
 461         }
 462
 463         delete[] points;
 464 }
 465
 466 void AnalogSignal::paint_envelope(QPainter &p,
 467         const shared_ptr<pv::data::AnalogSegment> &segment,
 468         int y, int left, const int64_t start, const int64_t end,
 469         const double pixels_offset, const double samples_per_pixel)
 470 {
 471         using pv::data::AnalogSegment;
 472
 473         // Note: Envelope painting currently doesn't generate a pixel<->value lookup table
 474         if (show_hover_marker_)
 475                 reset_pixel_values();
 476
 477         AnalogSegment::EnvelopeSection e;
 478         segment->get_envelope_section(e, start, end, samples_per_pixel);
 479
 480         if (e.length < 2)
 481                 return;
 482
 483         p.setPen(QPen(Qt::NoPen));
 484         p.setBrush(base_->color());
 485
 486         QRectF *const rects = new QRectF[e.length];
 487         QRectF *rect = rects;
 488
 489         for (uint64_t sample = 0; sample < e.length - 1; sample++) {
 490                 const float x = ((e.scale * sample + e.start) /
 491                         samples_per_pixel - pixels_offset) + left;
 492
 493                 const AnalogSegment::EnvelopeSample *const s = e.samples + sample;
 494
 495                 // We overlap this sample with the next so that vertical
 496                 // gaps do not appear during steep rising or falling edges
 497                 const float b = y - max(s->max, (s + 1)->min) * scale_;
 498                 const float t = y - min(s->min, (s + 1)->max) * scale_;
 499
 500                 float h = b - t;
 501                 if (h >= 0.0f && h <= 1.0f)
 502                         h = 1.0f;
 503                 if (h <= 0.0f && h >= -1.0f)
 504                         h = -1.0f;
 505
 506                 *rect++ = QRectF(x, t, 1.0f, h);
 507         }
 508
 509         p.drawRects(rects, e.length);
 510
 511         delete[] rects;
 512         delete[] e.samples;
 513 }
 514
 515 void AnalogSignal::paint_logic_mid(QPainter &p, ViewItemPaintParams &pp)
 516 {
 517         QLineF *line;
 518
 519         vector< pair<int64_t, bool> > edges;
 520
 521         assert(base_);
 522
 523         const int y = get_visual_y();
 524
 525         if (!base_->enabled() || !base_->logic_data())
 526                 return;
 527
 528         const int signal_margin =
 529                 QFontMetrics(QApplication::font()).height() / 2;
 530
 531         const int ph = min(pos_vdivs_, 1) * div_height_;
 532         const int nh = min(neg_vdivs_, 1) * div_height_;
 533         const float high_offset = y - ph + signal_margin + 0.5f;
 534         const float low_offset = y + nh - signal_margin - 0.5f;
 535         const float signal_height = low_offset - high_offset;
 536
 537         shared_ptr<pv::data::LogicSegment> segment = get_logic_segment_to_paint();
 538         if (!segment || (segment->get_sample_count() == 0))
 539                 return;
 540
 541         double samplerate = segment->samplerate();
 542
 543         // Show sample rate as 1Hz when it is unknown
 544         if (samplerate == 0.0)
 545                 samplerate = 1.0;
 546
 547         const double pixels_offset = pp.pixels_offset();
 548         const pv::util::Timestamp& start_time = segment->start_time();
 549         const int64_t last_sample = (int64_t)segment->get_sample_count() - 1;
 550         const double samples_per_pixel = samplerate * pp.scale();
 551         const double pixels_per_sample = 1 / samples_per_pixel;
 552         const pv::util::Timestamp start = samplerate * (pp.offset() - start_time);
 553         const pv::util::Timestamp end = start + samples_per_pixel * pp.width();
 554
 555         const int64_t start_sample = min(max(floor(start).convert_to<int64_t>(),
 556                 (int64_t)0), last_sample);
 557         const uint64_t end_sample = min(max(ceil(end).convert_to<int64_t>(),
 558                 (int64_t)0), last_sample);
 559
 560         segment->get_subsampled_edges(edges, start_sample, end_sample,
 561                 samples_per_pixel / LogicSignal::Oversampling, 0);
 562         assert(edges.size() >= 2);
 563
 564         const float first_sample_x =
 565                 pp.left() + (edges.front().first / samples_per_pixel - pixels_offset);
 566         const float last_sample_x =
 567                 pp.left() + (edges.back().first / samples_per_pixel - pixels_offset);
 568
 569         // Check whether we need to paint the sampling points
 570         const bool show_sampling_points = show_sampling_points_ && (samples_per_pixel < 0.25);
 571         vector<QRectF> sampling_points;
 572         float sampling_point_x = first_sample_x;
 573         int64_t sampling_point_sample = start_sample;
 574         const int w = 2;
 575
 576         if (show_sampling_points)
 577                 sampling_points.reserve(end_sample - start_sample + 1);
 578
 579         vector<QRectF> high_rects;
 580         float rising_edge_x;
 581         bool rising_edge_seen = false;
 582
 583         // Paint the edges
 584         const unsigned int edge_count = edges.size() - 2;
 585         QLineF *const edge_lines = new QLineF[edge_count];
 586         line = edge_lines;
 587
 588         if (edges.front().second) {
 589                 // Beginning of trace is high
 590                 rising_edge_x = first_sample_x;
 591                 rising_edge_seen = true;
 592         }
 593
 594         for (auto i = edges.cbegin() + 1; i != edges.cend() - 1; i++) {
 595                 // Note: multiple edges occupying a single pixel are represented by an edge
 596                 // with undefined logic level. This means that only the first falling edge
 597                 // after a rising edge corresponds to said rising edge - and vice versa. If
 598                 // more edges with the same logic level follow, they denote multiple edges.
 599
 600                 const float x = pp.left() + ((*i).first / samples_per_pixel - pixels_offset);
 601                 *line++ = QLineF(x, high_offset, x, low_offset);
 602
 603                 if (fill_high_areas_) {
 604                         // Any edge terminates a high area
 605                         if (rising_edge_seen) {
 606                                 const int width = x - rising_edge_x;
 607                                 if (width > 0)
 608                                         high_rects.emplace_back(rising_edge_x, high_offset,
 609                                                 width, signal_height);
 610                                 rising_edge_seen = false;
 611                         }
 612
 613                         // Only rising edges start high areas
 614                         if ((*i).second) {
 615                                 rising_edge_x = x;
 616                                 rising_edge_seen = true;
 617                         }
 618                 }
 619
 620                 if (show_sampling_points)
 621                         while (sampling_point_sample < (*i).first) {
 622                                 const float y = (*i).second ? low_offset : high_offset;
 623                                 sampling_points.emplace_back(
 624                                         QRectF(sampling_point_x - (w / 2), y - (w / 2), w, w));
 625                                 sampling_point_sample++;
 626                                 sampling_point_x += pixels_per_sample;
 627                         };
 628         }
 629
 630         // Calculate the sample points from the last edge to the end of the trace
 631         if (show_sampling_points)
 632                 while ((uint64_t)sampling_point_sample <= end_sample) {
 633                         // Signal changed after the last edge, so the level is inverted
 634                         const float y = (edges.cend() - 1)->second ? high_offset : low_offset;
 635                         sampling_points.emplace_back(
 636                                 QRectF(sampling_point_x - (w / 2), y - (w / 2), w, w));
 637                         sampling_point_sample++;
 638                         sampling_point_x += pixels_per_sample;
 639                 };
 640
 641         if (fill_high_areas_) {
 642                 // Add last high rectangle if the signal is still high at the end of the trace
 643                 if (rising_edge_seen && (edges.cend() - 1)->second)
 644                         high_rects.emplace_back(rising_edge_x, high_offset,
 645                                 last_sample_x - rising_edge_x, signal_height);
 646
 647                 p.setPen(high_fill_color_);
 648                 p.setBrush(high_fill_color_);
 649                 p.drawRects((const QRectF*)(high_rects.data()), high_rects.size());
 650         }
 651
 652         p.setPen(LogicSignal::EdgeColor);
 653         p.drawLines(edge_lines, edge_count);
 654         delete[] edge_lines;
 655
 656         // Paint the caps
 657         const unsigned int max_cap_line_count = edges.size();
 658         QLineF *const cap_lines = new QLineF[max_cap_line_count];
 659
 660         p.setPen(LogicSignal::HighColor);
 661         paint_logic_caps(p, cap_lines, edges, true, samples_per_pixel,
 662                 pixels_offset, pp.left(), high_offset);
 663         p.setPen(LogicSignal::LowColor);
 664         paint_logic_caps(p, cap_lines, edges, false, samples_per_pixel,
 665                 pixels_offset, pp.left(), low_offset);
 666
 667         delete[] cap_lines;
 668
 669         // Paint the sampling points
 670         if (show_sampling_points) {
 671                 p.setPen(SamplingPointColor);
 672                 p.drawRects(sampling_points.data(), sampling_points.size());
 673         }
 674 }
 675
 676 void AnalogSignal::paint_logic_caps(QPainter &p, QLineF *const lines,
 677         vector< pair<int64_t, bool> > &edges, bool level,
 678         double samples_per_pixel, double pixels_offset, float x_offset,
 679         float y_offset)
 680 {
 681         QLineF *line = lines;
 682
 683         for (auto i = edges.begin(); i != (edges.end() - 1); i++)
 684                 if ((*i).second == level) {
 685                         *line++ = QLineF(
 686                                 ((*i).first / samples_per_pixel -
 687                                         pixels_offset) + x_offset, y_offset,
 688                                 ((*(i+1)).first / samples_per_pixel -
 689                                         pixels_offset) + x_offset, y_offset);
 690                 }
 691
 692         p.drawLines(lines, line - lines);
 693 }
 694
 695 shared_ptr<pv::data::AnalogSegment> AnalogSignal::get_analog_segment_to_paint() const
 696 {
 697         shared_ptr<pv::data::AnalogSegment> segment;
 698
 699         const deque< shared_ptr<pv::data::AnalogSegment> > &segments =
 700                 base_->analog_data()->analog_segments();
 701
 702         if (!segments.empty()) {
 703                 if (segment_display_mode_ == ShowLastSegmentOnly)
 704                         segment = segments.back();
 705
 706                 if ((segment_display_mode_ == ShowSingleSegmentOnly) ||
 707                                 (segment_display_mode_ == ShowLastCompleteSegmentOnly)) {
 708                         try {
 709                                 segment = segments.at(current_segment_);
 710                         } catch (out_of_range&) {
 711                                 qDebug() << "Current analog segment out of range for signal" << base_->name() << ":" << current_segment_;
 712                         }
 713                 }
 714         }
 715
 716         return segment;
 717 }
 718
 719 shared_ptr<pv::data::LogicSegment> AnalogSignal::get_logic_segment_to_paint() const
 720 {
 721         shared_ptr<pv::data::LogicSegment> segment;
 722
 723         const deque< shared_ptr<pv::data::LogicSegment> > &segments =
 724                 base_->logic_data()->logic_segments();
 725
 726         if (!segments.empty()) {
 727                 if (segment_display_mode_ == ShowLastSegmentOnly)
 728                         segment = segments.back();
 729
 730                 if ((segment_display_mode_ == ShowSingleSegmentOnly) ||
 731                                 (segment_display_mode_ == ShowLastCompleteSegmentOnly)) {
 732                         try {
 733                                 segment = segments.at(current_segment_);
 734                         } catch (out_of_range&) {
 735                                 qDebug() << "Current logic segment out of range for signal" << base_->name() << ":" << current_segment_;
 736                         }
 737                 }
 738         }
 739
 740         return segment;
 741 }
 742
 743 float AnalogSignal::get_resolution(int scale_index)
 744 {
 745         const float seq[] = {1.0f, 2.0f, 5.0f};
 746
 747         const int offset = numeric_limits<int>::max() / (2 * countof(seq));
 748         const div_t d = div((int)(scale_index + countof(seq) * offset),
 749                 countof(seq));
 750
 751         return powf(10.0f, d.quot - offset) * seq[d.rem];
 752 }
 753
 754 void AnalogSignal::update_scale()
 755 {
 756         resolution_ = get_resolution(scale_index_);
 757         scale_ = div_height_ / resolution_;
 758 }
 759
 760 void AnalogSignal::update_conversion_widgets()
 761 {
 762         SignalBase::ConversionType conv_type = base_->get_conversion_type();
 763
 764         // Enable or disable widgets depending on conversion state
 765         conv_threshold_cb_->setEnabled(conv_type != SignalBase::NoConversion);
 766         display_type_cb_->setEnabled(conv_type != SignalBase::NoConversion);
 767
 768         conv_threshold_cb_->clear();
 769
 770         vector < pair<QString, int> > presets = base_->get_conversion_presets();
 771
 772         // Prevent the combo box from firing the "edit text changed" signal
 773         // as that would involuntarily select the first entry
 774         conv_threshold_cb_->blockSignals(true);
 775
 776         // Set available options depending on chosen conversion
 777         for (pair<QString, int>& preset : presets)
 778                 conv_threshold_cb_->addItem(preset.first, preset.second);
 779
 780         map < QString, QVariant > options = base_->get_conversion_options();
 781
 782         if (conv_type == SignalBase::A2LConversionByThreshold) {
 783                 const vector<double> thresholds = base_->get_conversion_thresholds(
 784                                 SignalBase::A2LConversionByThreshold, true);
 785                 conv_threshold_cb_->addItem(
 786                                 QString("%1V").arg(QString::number(thresholds[0], 'f', 1)), -1);
 787         }
 788
 789         if (conv_type == SignalBase::A2LConversionBySchmittTrigger) {
 790                 const vector<double> thresholds = base_->get_conversion_thresholds(
 791                                 SignalBase::A2LConversionBySchmittTrigger, true);
 792                 conv_threshold_cb_->addItem(QString("%1V/%2V").arg(
 793                                 QString::number(thresholds[0], 'f', 1),
 794                                 QString::number(thresholds[1], 'f', 1)), -1);
 795         }
 796
 797         int preset_id = base_->get_current_conversion_preset();
 798         conv_threshold_cb_->setCurrentIndex(
 799                         conv_threshold_cb_->findData(preset_id));
 800
 801         conv_threshold_cb_->blockSignals(false);
 802 }
 803
 804 vector<data::LogicSegment::EdgePair> AnalogSignal::get_nearest_level_changes(uint64_t sample_pos)
 805 {
 806         assert(base_);
 807         assert(owner_);
 808
 809         // Return if there's no logic data or we're showing only the analog trace
 810         if (!base_->logic_data() || (display_type_ == DisplayAnalog))
 811                 return vector<data::LogicSegment::EdgePair>();
 812
 813         if (sample_pos == 0)
 814                 return vector<LogicSegment::EdgePair>();
 815
 816         shared_ptr<LogicSegment> segment = get_logic_segment_to_paint();
 817         if (!segment || (segment->get_sample_count() == 0))
 818                 return vector<LogicSegment::EdgePair>();
 819
 820         const View *view = owner_->view();
 821         assert(view);
 822         const double samples_per_pixel = base_->get_samplerate() * view->scale();
 823
 824         vector<LogicSegment::EdgePair> edges;
 825
 826         segment->get_surrounding_edges(edges, sample_pos,
 827                 samples_per_pixel / LogicSignal::Oversampling, 0);
 828
 829         if (edges.empty())
 830                 return vector<LogicSegment::EdgePair>();
 831
 832         return edges;
 833 }
 834
 835 void AnalogSignal::perform_autoranging(bool keep_divs, bool force_update)
 836 {
 837         const deque< shared_ptr<pv::data::AnalogSegment> > &segments =
 838                 base_->analog_data()->analog_segments();
 839
 840         if (segments.empty())
 841                 return;
 842
 843         static double prev_min = 0, prev_max = 0;
 844         double min = 0, max = 0;
 845
 846         for (const shared_ptr<pv::data::AnalogSegment>& segment : segments) {
 847                 pair<double, double> mm = segment->get_min_max();
 848                 min = std::min(min, mm.first);
 849                 max = std::max(max, mm.second);
 850         }
 851
 852         if ((min == prev_min) && (max == prev_max) && !force_update)
 853                 return;
 854
 855         prev_min = min;
 856         prev_max = max;
 857
 858         // If we're allowed to alter the div assignment...
 859         if (!keep_divs) {
 860                 // Use all divs for the positive range if there are no negative values
 861                 if ((min == 0) && (neg_vdivs_ > 0)) {
 862                         pos_vdivs_ += neg_vdivs_;
 863                         neg_vdivs_ = 0;
 864                 }
 865
 866                 // Split up the divs if there are negative values but no negative divs
 867                 if ((min < 0) && (neg_vdivs_ == 0)) {
 868                         neg_vdivs_ = pos_vdivs_ / 2;
 869                         pos_vdivs_ -= neg_vdivs_;
 870                 }
 871         }
 872
 873         // If there is still no positive div when we need it, add one
 874         // (this can happen when pos_vdivs==neg_vdivs==0)
 875         if ((max > 0) && (pos_vdivs_ == 0)) {
 876                 pos_vdivs_ = 1;
 877                 owner_->extents_changed(false, true);
 878         }
 879
 880         // If there is still no negative div when we need it, add one
 881         // (this can happen when pos_vdivs was 0 or 1 when trying to split)
 882         if ((min < 0) && (neg_vdivs_ == 0)) {
 883                 neg_vdivs_ = 1;
 884                 owner_->extents_changed(false, true);
 885         }
 886
 887         double min_value_per_div;
 888         if ((pos_vdivs_ > 0) && (neg_vdivs_ >  0))
 889                 min_value_per_div = std::max(max / pos_vdivs_, -min / neg_vdivs_);
 890         else if (pos_vdivs_ > 0)
 891                 min_value_per_div = max / pos_vdivs_;
 892         else
 893                 min_value_per_div = -min / neg_vdivs_;
 894
 895         // Find first scale value that is bigger than the value we need
 896         for (int i = MinScaleIndex; i < MaxScaleIndex; i++)
 897                 if (get_resolution(i) > min_value_per_div) {
 898                         scale_index_ = i;
 899                         break;
 900                 }
 901
 902         update_scale();
 903 }
 904
 905 void AnalogSignal::reset_pixel_values()
 906 {
 907         value_at_pixel_pos_.clear();
 908         current_pixel_pos_ = -1;
 909         prev_value_at_pixel_ = std::numeric_limits<float>::quiet_NaN();
 910 }
 911
 912 void AnalogSignal::process_next_sample_value(float x, float value)
 913 {
 914         // Note: NAN is used to indicate the non-existance of a value at this pixel
 915
 916         if (std::isnan(prev_value_at_pixel_)) {
 917                 if (x < 0) {
 918                         min_value_at_pixel_ = value;
 919                         max_value_at_pixel_ = value;
 920                         prev_value_at_pixel_ = value;
 921                         current_pixel_pos_ = x;
 922                 } else
 923                         prev_value_at_pixel_ = std::numeric_limits<float>::quiet_NaN();
 924         }
 925
 926         const int pixel_pos = (int)(x + 0.5);
 927
 928         if (pixel_pos > current_pixel_pos_) {
 929                 if (pixel_pos - current_pixel_pos_ == 1) {
 930                         if (std::isnan(prev_value_at_pixel_)) {
 931                                 value_at_pixel_pos_.push_back(prev_value_at_pixel_);
 932                         } else {
 933                                 // Average the min/max range to create one value for the previous pixel
 934                                 const float avg = (min_value_at_pixel_ + max_value_at_pixel_) / 2;
 935                                 value_at_pixel_pos_.push_back(avg);
 936                         }
 937                 } else {
 938                         // Interpolate values to create values for the intermediate pixels
 939                         const float start_value = prev_value_at_pixel_;
 940                         const float end_value = value;
 941                         const int steps = fabs(pixel_pos - current_pixel_pos_);
 942                         const double gradient = (end_value - start_value) / steps;
 943                         for (int i = 0; i < steps; i++) {
 944                                 if (current_pixel_pos_ + i < 0)
 945                                         continue;
 946                                 value_at_pixel_pos_.push_back(start_value + i * gradient);
 947                         }
 948                 }
 949
 950                 min_value_at_pixel_ = value;
 951                 max_value_at_pixel_ = value;
 952                 prev_value_at_pixel_ = value;
 953                 current_pixel_pos_ = pixel_pos;
 954         } else {
 955                 // Another sample for the same pixel
 956                 if (value < min_value_at_pixel_)
 957                         min_value_at_pixel_ = value;
 958                 if (value > max_value_at_pixel_)
 959                         max_value_at_pixel_ = value;
 960         }
 961 }
 962
 963 void AnalogSignal::populate_popup_form(QWidget *parent, QFormLayout *form)
 964 {
 965         // Add the standard options
 966         Signal::populate_popup_form(parent, form);
 967
 968         QFormLayout *const layout = new QFormLayout;
 969
 970         // Add div-related settings
 971         pvdiv_sb_ = new QSpinBox(parent);
 972         pvdiv_sb_->setRange(0, MaximumVDivs);
 973         pvdiv_sb_->setValue(pos_vdivs_);
 974         connect(pvdiv_sb_, SIGNAL(valueChanged(int)),
 975                 this, SLOT(on_pos_vdivs_changed(int)));
 976         layout->addRow(tr("Number of pos vertical divs"), pvdiv_sb_);
 977
 978         nvdiv_sb_ = new QSpinBox(parent);
 979         nvdiv_sb_->setRange(0, MaximumVDivs);
 980         nvdiv_sb_->setValue(neg_vdivs_);
 981         connect(nvdiv_sb_, SIGNAL(valueChanged(int)),
 982                 this, SLOT(on_neg_vdivs_changed(int)));
 983         layout->addRow(tr("Number of neg vertical divs"), nvdiv_sb_);
 984
 985         div_height_sb_ = new QSpinBox(parent);
 986         div_height_sb_->setRange(20, 1000);
 987         div_height_sb_->setSingleStep(5);
 988         div_height_sb_->setSuffix(tr(" pixels"));
 989         div_height_sb_->setValue(div_height_);
 990         connect(div_height_sb_, SIGNAL(valueChanged(int)),
 991                 this, SLOT(on_div_height_changed(int)));
 992         layout->addRow(tr("Div height"), div_height_sb_);
 993
 994         // Add the vertical resolution
 995         resolution_cb_ = new QComboBox(parent);
 996
 997         for (int i = MinScaleIndex; i < MaxScaleIndex; i++) {
 998                 const QString label = QString("%1").arg(get_resolution(i));
 999                 resolution_cb_->insertItem(0, label, QVariant(i));
1000         }
1001
1002         int cur_idx = resolution_cb_->findData(QVariant(scale_index_));
1003         resolution_cb_->setCurrentIndex(cur_idx);
1004
1005         connect(resolution_cb_, SIGNAL(currentIndexChanged(int)),
1006                 this, SLOT(on_resolution_changed(int)));
1007
1008         QGridLayout *const vdiv_layout = new QGridLayout;
1009         QLabel *const vdiv_unit = new QLabel(tr("V/div"));
1010         vdiv_layout->addWidget(resolution_cb_, 0, 0);
1011         vdiv_layout->addWidget(vdiv_unit, 0, 1);
1012
1013         layout->addRow(tr("Vertical resolution"), vdiv_layout);
1014
1015         // Add the autoranging checkbox
1016         QCheckBox* autoranging_cb = new QCheckBox();
1017         autoranging_cb->setCheckState(autoranging_ ? Qt::Checked : Qt::Unchecked);
1018
1019         connect(autoranging_cb, SIGNAL(stateChanged(int)),
1020                 this, SLOT(on_autoranging_changed(int)));
1021
1022         layout->addRow(tr("Autoranging"), autoranging_cb);
1023
1024         // Add the conversion type dropdown
1025         conversion_cb_ = new QComboBox();
1026
1027         conversion_cb_->addItem(tr("none"),
1028                 SignalBase::NoConversion);
1029         conversion_cb_->addItem(tr("to logic via threshold"),
1030                 SignalBase::A2LConversionByThreshold);
1031         conversion_cb_->addItem(tr("to logic via schmitt-trigger"),
1032                 SignalBase::A2LConversionBySchmittTrigger);
1033
1034         cur_idx = conversion_cb_->findData(QVariant(base_->get_conversion_type()));
1035         conversion_cb_->setCurrentIndex(cur_idx);
1036
1037         layout->addRow(tr("Conversion"), conversion_cb_);
1038
1039         connect(conversion_cb_, SIGNAL(currentIndexChanged(int)),
1040                 this, SLOT(on_conversion_changed(int)));
1041
1042     // Add the conversion threshold settings
1043     conv_threshold_cb_ = new QComboBox();
1044     conv_threshold_cb_->setEditable(true);
1045
1046     layout->addRow(tr("Conversion threshold(s)"), conv_threshold_cb_);
1047
1048     connect(conv_threshold_cb_, SIGNAL(currentIndexChanged(int)),
1049             this, SLOT(on_conv_threshold_changed(int)));
1050     connect(conv_threshold_cb_, SIGNAL(editTextChanged(const QString&)),
1051             this, SLOT(on_conv_threshold_changed()));  // index will be -1
1052
1053         // Add the display type dropdown
1054         display_type_cb_ = new QComboBox();
1055
1056         display_type_cb_->addItem(tr("analog"), DisplayAnalog);
1057         display_type_cb_->addItem(tr("converted"), DisplayConverted);
1058         display_type_cb_->addItem(tr("analog+converted"), DisplayBoth);
1059
1060         cur_idx = display_type_cb_->findData(QVariant(display_type_));
1061         display_type_cb_->setCurrentIndex(cur_idx);
1062
1063         layout->addRow(tr("Show traces for"), display_type_cb_);
1064
1065         connect(display_type_cb_, SIGNAL(currentIndexChanged(int)),
1066                 this, SLOT(on_display_type_changed(int)));
1067
1068         // Update the conversion widget contents and states
1069         update_conversion_widgets();
1070
1071         form->addRow(layout);
1072 }
1073
1074 void AnalogSignal::hover_point_changed(const QPoint &hp)
1075 {
1076         Signal::hover_point_changed(hp);
1077
1078         // Note: Even though the view area begins at 0, we exclude 0 because
1079         // that's also the value given when the cursor is over the header to the
1080         // left of the trace paint area
1081         if (hp.x() <= 0) {
1082                 value_at_hover_pos_ = std::numeric_limits<float>::quiet_NaN();
1083         } else {
1084                 try {
1085                         value_at_hover_pos_ = value_at_pixel_pos_.at(hp.x());
1086                 } catch (out_of_range&) {
1087                         value_at_hover_pos_ = std::numeric_limits<float>::quiet_NaN();
1088                 }
1089         }
1090 }
1091
1092 void AnalogSignal::on_setting_changed(const QString &key, const QVariant &value)
1093 {
1094         Signal::on_setting_changed(key, value);
1095
1096         if (key == GlobalSettings::Key_View_ShowSamplingPoints)
1097                 show_sampling_points_ = value.toBool();
1098
1099         if (key == GlobalSettings::Key_View_FillSignalHighAreas)
1100                 fill_high_areas_ = value.toBool();
1101
1102         if (key == GlobalSettings::Key_View_FillSignalHighAreaColor)
1103                 high_fill_color_ = QColor::fromRgba(value.value<uint32_t>());
1104
1105         if (key == GlobalSettings::Key_View_ShowAnalogMinorGrid)
1106                 show_analog_minor_grid_ = value.toBool();
1107
1108         if (key == GlobalSettings::Key_View_ConversionThresholdDispMode) {
1109                 conversion_threshold_disp_mode_ = value.toInt();
1110
1111                 if (owner_)
1112                         owner_->row_item_appearance_changed(false, true);
1113         }
1114 }
1115
1116 void AnalogSignal::on_min_max_changed(float min, float max)
1117 {
1118         (void)min;
1119         (void)max;
1120
1121         if (autoranging_)
1122                 perform_autoranging(false, false);
1123 }
1124
1125 void AnalogSignal::on_pos_vdivs_changed(int vdivs)
1126 {
1127         if (vdivs == pos_vdivs_)
1128                 return;
1129
1130         pos_vdivs_ = vdivs;
1131
1132         // There has to be at least one div, positive or negative
1133         if ((neg_vdivs_ == 0) && (pos_vdivs_ == 0)) {
1134                 pos_vdivs_ = 1;
1135                 if (pvdiv_sb_)
1136                         pvdiv_sb_->setValue(pos_vdivs_);
1137         }
1138
1139         if (autoranging_) {
1140                 perform_autoranging(true, true);
1141
1142                 // It could be that a positive or negative div was added, so update
1143                 if (pvdiv_sb_) {
1144                         pvdiv_sb_->setValue(pos_vdivs_);
1145                         nvdiv_sb_->setValue(neg_vdivs_);
1146                 }
1147         }
1148
1149         if (owner_) {
1150                 // Call order is important, otherwise the lazy event handler won't work
1151                 owner_->extents_changed(false, true);
1152                 owner_->row_item_appearance_changed(false, true);
1153         }
1154 }
1155
1156 void AnalogSignal::on_neg_vdivs_changed(int vdivs)
1157 {
1158         if (vdivs == neg_vdivs_)
1159                 return;
1160
1161         neg_vdivs_ = vdivs;
1162
1163         // There has to be at least one div, positive or negative
1164         if ((neg_vdivs_ == 0) && (pos_vdivs_ == 0)) {
1165                 pos_vdivs_ = 1;
1166                 if (pvdiv_sb_)
1167                         pvdiv_sb_->setValue(pos_vdivs_);
1168         }
1169
1170         if (autoranging_) {
1171                 perform_autoranging(true, true);
1172
1173                 // It could be that a positive or negative div was added, so update
1174                 if (pvdiv_sb_) {
1175                         pvdiv_sb_->setValue(pos_vdivs_);
1176                         nvdiv_sb_->setValue(neg_vdivs_);
1177                 }
1178         }
1179
1180         if (owner_) {
1181                 // Call order is important, otherwise the lazy event handler won't work
1182                 owner_->extents_changed(false, true);
1183                 owner_->row_item_appearance_changed(false, true);
1184         }
1185 }
1186
1187 void AnalogSignal::on_div_height_changed(int height)
1188 {
1189         div_height_ = height;
1190         update_scale();
1191
1192         if (owner_) {
1193                 // Call order is important, otherwise the lazy event handler won't work
1194                 owner_->extents_changed(false, true);
1195                 owner_->row_item_appearance_changed(false, true);
1196         }
1197 }
1198
1199 void AnalogSignal::on_resolution_changed(int index)
1200 {
1201         scale_index_ = resolution_cb_->itemData(index).toInt();
1202         update_scale();
1203
1204         if (owner_)
1205                 owner_->row_item_appearance_changed(false, true);
1206 }
1207
1208 void AnalogSignal::on_autoranging_changed(int state)
1209 {
1210         autoranging_ = (state == Qt::Checked);
1211
1212         if (autoranging_)
1213                 perform_autoranging(false, true);
1214
1215         if (owner_) {
1216                 // Call order is important, otherwise the lazy event handler won't work
1217                 owner_->extents_changed(false, true);
1218                 owner_->row_item_appearance_changed(false, true);
1219         }
1220 }
1221
1222 void AnalogSignal::on_conversion_changed(int index)
1223 {
1224         SignalBase::ConversionType old_conv_type = base_->get_conversion_type();
1225
1226         SignalBase::ConversionType conv_type =
1227                 (SignalBase::ConversionType)(conversion_cb_->itemData(index).toInt());
1228
1229         if (conv_type != old_conv_type) {
1230                 base_->set_conversion_type(conv_type);
1231                 update_conversion_widgets();
1232
1233                 if (owner_)
1234                         owner_->row_item_appearance_changed(false, true);
1235         }
1236 }
1237
1238 void AnalogSignal::on_conv_threshold_changed(int index)
1239 {
1240         SignalBase::ConversionType conv_type = base_->get_conversion_type();
1241
1242         // Note: index is set to -1 if the text in the combo box matches none of
1243         // the entries in the combo box
1244
1245         if ((index == -1) && (conv_threshold_cb_->currentText().length() == 0))
1246                 return;
1247
1248         // The combo box entry with the custom value has user_data set to -1
1249         const int user_data = conv_threshold_cb_->findText(
1250                         conv_threshold_cb_->currentText());
1251
1252         const bool use_custom_thr = (index == -1) || (user_data == -1);
1253
1254         if (conv_type == SignalBase::A2LConversionByThreshold && use_custom_thr) {
1255                 // Not one of the preset values, try to parse the combo box text
1256                 // Note: Regex loosely based on
1257                 // https://txt2re.com/index-c++.php3?s=0.1V&1&-13
1258                 QString re1 = "([+-]?\\d*[\\.,]?\\d*)"; // Float value
1259                 QString re2 = "([a-zA-Z]*)"; // SI unit
1260                 QRegExp regex(re1 + re2);
1261
1262                 const QString text = conv_threshold_cb_->currentText();
1263                 if (!regex.exactMatch(text))
1264                         return;  // String doesn't match the regex
1265
1266                 QStringList tokens = regex.capturedTexts();
1267
1268                 // For now, we simply assume that the unit is volt without modifiers
1269                 const double thr = tokens.at(1).toDouble();
1270
1271                 // Only restart the conversion if the threshold was updated.
1272                 // We're starting a delayed conversion because the user may still be
1273                 // typing and the UI would lag if we kept on restarting it immediately
1274                 if (base_->set_conversion_option("threshold_value", thr))
1275                         base_->start_conversion(true);
1276         }
1277
1278         if (conv_type == SignalBase::A2LConversionBySchmittTrigger && use_custom_thr) {
1279                 // Not one of the preset values, try to parse the combo box text
1280                 // Note: Regex loosely based on
1281                 // https://txt2re.com/index-c++.php3?s=0.1V/0.2V&2&14&-22&3&15
1282                 QString re1 = "([+-]?\\d*[\\.,]?\\d*)"; // Float value
1283                 QString re2 = "([a-zA-Z]*)"; // SI unit
1284                 QString re3 = "\\/"; // Forward slash, not captured
1285                 QString re4 = "([+-]?\\d*[\\.,]?\\d*)"; // Float value
1286                 QString re5 = "([a-zA-Z]*)"; // SI unit
1287                 QRegExp regex(re1 + re2 + re3 + re4 + re5);
1288
1289                 const QString text = conv_threshold_cb_->currentText();
1290                 if (!regex.exactMatch(text))
1291                         return;  // String doesn't match the regex
1292
1293                 QStringList tokens = regex.capturedTexts();
1294
1295                 // For now, we simply assume that the unit is volt without modifiers
1296                 const double low_thr = tokens.at(1).toDouble();
1297                 const double high_thr = tokens.at(3).toDouble();
1298
1299                 // Only restart the conversion if one of the options was updated.
1300                 // We're starting a delayed conversion because the user may still be
1301                 // typing and the UI would lag if we kept on restarting it immediately
1302                 bool o1 = base_->set_conversion_option("threshold_value_low", low_thr);
1303                 bool o2 = base_->set_conversion_option("threshold_value_high", high_thr);
1304                 if (o1 || o2)
1305                         base_->start_conversion(true);  // Start delayed conversion
1306         }
1307
1308         base_->set_conversion_preset((SignalBase::ConversionPreset)index);
1309
1310         // Immediately start the conversion if we're not using custom values
1311         // (i.e. we're using one of the presets)
1312         if (!use_custom_thr)
1313                 base_->start_conversion();
1314 }
1315
1316 void AnalogSignal::on_delayed_conversion_starter()
1317 {
1318         base_->start_conversion();
1319 }
1320
1321 void AnalogSignal::on_display_type_changed(int index)
1322 {
1323         display_type_ = (DisplayType)(display_type_cb_->itemData(index).toInt());
1324
1325         if (owner_)
1326                 owner_->row_item_appearance_changed(false, true);
1327 }
1328
1329 } // namespace trace
1330 } // namespace views
1331 } // namespace pv