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