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         // QPainter::drawPolyline() is slow, let's paint the lines ourselves
 448         for (int64_t i = 1; i < points_count; i++)
 449                 p.drawLine(points[i - 1], points[i]);
 450
 451         if (show_sampling_points) {
 452                 if (paint_thr_dots) {
 453                         p.setPen(SamplingPointColorNe);
 454                         p.drawRects(sampling_points[0].data(), sampling_points[0].size());
 455                         p.setPen(SamplingPointColorLo);
 456                         p.drawRects(sampling_points[1].data(), sampling_points[1].size());
 457                         p.setPen(SamplingPointColorHi);
 458                         p.drawRects(sampling_points[2].data(), sampling_points[2].size());
 459                 } else {
 460                         p.setPen(SamplingPointColor);
 461                         p.drawRects(sampling_points[0].data(), sampling_points[0].size());
 462                 }
 463         }
 464
 465         delete[] points;
 466 }
 467
 468 void AnalogSignal::paint_envelope(QPainter &p,
 469         const shared_ptr<pv::data::AnalogSegment> &segment,
 470         int y, int left, const int64_t start, const int64_t end,
 471         const double pixels_offset, const double samples_per_pixel)
 472 {
 473         using pv::data::AnalogSegment;
 474
 475         // Note: Envelope painting currently doesn't generate a pixel<->value lookup table
 476         if (show_hover_marker_)
 477                 reset_pixel_values();
 478
 479         AnalogSegment::EnvelopeSection e;
 480         segment->get_envelope_section(e, start, end, samples_per_pixel);
 481
 482         if (e.length < 2)
 483                 return;
 484
 485         p.setPen(QPen(Qt::NoPen));
 486         p.setBrush(base_->color());
 487
 488         QRectF *const rects = new QRectF[e.length];
 489         QRectF *rect = rects;
 490
 491         for (uint64_t sample = 0; sample < e.length - 1; sample++) {
 492                 const float x = ((e.scale * sample + e.start) /
 493                         samples_per_pixel - pixels_offset) + left;
 494
 495                 const AnalogSegment::EnvelopeSample *const s = e.samples + sample;
 496
 497                 // We overlap this sample with the next so that vertical
 498                 // gaps do not appear during steep rising or falling edges
 499                 const float b = y - max(s->max, (s + 1)->min) * scale_;
 500                 const float t = y - min(s->min, (s + 1)->max) * scale_;
 501
 502                 float h = b - t;
 503                 if (h >= 0.0f && h <= 1.0f)
 504                         h = 1.0f;
 505                 if (h <= 0.0f && h >= -1.0f)
 506                         h = -1.0f;
 507
 508                 *rect++ = QRectF(x, t, 1.0f, h);
 509         }
 510
 511         p.drawRects(rects, e.length);
 512
 513         delete[] rects;
 514         delete[] e.samples;
 515 }
 516
 517 void AnalogSignal::paint_logic_mid(QPainter &p, ViewItemPaintParams &pp)
 518 {
 519         QLineF *line;
 520
 521         vector< pair<int64_t, bool> > edges;
 522
 523         assert(base_);
 524
 525         const int y = get_visual_y();
 526
 527         if (!base_->enabled() || !base_->logic_data())
 528                 return;
 529
 530         const int signal_margin =
 531                 QFontMetrics(QApplication::font()).height() / 2;
 532
 533         const int ph = min(pos_vdivs_, 1) * div_height_;
 534         const int nh = min(neg_vdivs_, 1) * div_height_;
 535         const float high_offset = y - ph + signal_margin + 0.5f;
 536         const float low_offset = y + nh - signal_margin - 0.5f;
 537         const float signal_height = low_offset - high_offset;
 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         const float first_sample_x =
 567                 pp.left() + (edges.front().first / samples_per_pixel - pixels_offset);
 568         const float last_sample_x =
 569                 pp.left() + (edges.back().first / samples_per_pixel - pixels_offset);
 570
 571         // Check whether we need to paint the sampling points
 572         const bool show_sampling_points = show_sampling_points_ && (samples_per_pixel < 0.25);
 573         vector<QRectF> sampling_points;
 574         float sampling_point_x = first_sample_x;
 575         int64_t sampling_point_sample = start_sample;
 576         const int w = 2;
 577
 578         if (show_sampling_points)
 579                 sampling_points.reserve(end_sample - start_sample + 1);
 580
 581         vector<QRectF> high_rects;
 582         float rising_edge_x;
 583         bool rising_edge_seen = false;
 584
 585         // Paint the edges
 586         const unsigned int edge_count = edges.size() - 2;
 587         QLineF *const edge_lines = new QLineF[edge_count];
 588         line = edge_lines;
 589
 590         if (edges.front().second) {
 591                 // Beginning of trace is high
 592                 rising_edge_x = first_sample_x;
 593                 rising_edge_seen = true;
 594         }
 595
 596         for (auto i = edges.cbegin() + 1; i != edges.cend() - 1; i++) {
 597                 // Note: multiple edges occupying a single pixel are represented by an edge
 598                 // with undefined logic level. This means that only the first falling edge
 599                 // after a rising edge corresponds to said rising edge - and vice versa. If
 600                 // more edges with the same logic level follow, they denote multiple edges.
 601
 602                 const float x = pp.left() + ((*i).first / samples_per_pixel - pixels_offset);
 603                 *line++ = QLineF(x, high_offset, x, low_offset);
 604
 605                 if (fill_high_areas_) {
 606                         // Any edge terminates a high area
 607                         if (rising_edge_seen) {
 608                                 const int width = x - rising_edge_x;
 609                                 if (width > 0)
 610                                         high_rects.emplace_back(rising_edge_x, high_offset,
 611                                                 width, signal_height);
 612                                 rising_edge_seen = false;
 613                         }
 614
 615                         // Only rising edges start high areas
 616                         if ((*i).second) {
 617                                 rising_edge_x = x;
 618                                 rising_edge_seen = true;
 619                         }
 620                 }
 621
 622                 if (show_sampling_points)
 623                         while (sampling_point_sample < (*i).first) {
 624                                 const float y = (*i).second ? low_offset : high_offset;
 625                                 sampling_points.emplace_back(
 626                                         QRectF(sampling_point_x - (w / 2), y - (w / 2), w, w));
 627                                 sampling_point_sample++;
 628                                 sampling_point_x += pixels_per_sample;
 629                         };
 630         }
 631
 632         // Calculate the sample points from the last edge to the end of the trace
 633         if (show_sampling_points)
 634                 while ((uint64_t)sampling_point_sample <= end_sample) {
 635                         // Signal changed after the last edge, so the level is inverted
 636                         const float y = (edges.cend() - 1)->second ? high_offset : low_offset;
 637                         sampling_points.emplace_back(
 638                                 QRectF(sampling_point_x - (w / 2), y - (w / 2), w, w));
 639                         sampling_point_sample++;
 640                         sampling_point_x += pixels_per_sample;
 641                 };
 642
 643         if (fill_high_areas_) {
 644                 // Add last high rectangle if the signal is still high at the end of the trace
 645                 if (rising_edge_seen && (edges.cend() - 1)->second)
 646                         high_rects.emplace_back(rising_edge_x, high_offset,
 647                                 last_sample_x - rising_edge_x, signal_height);
 648
 649                 p.setPen(high_fill_color_);
 650                 p.setBrush(high_fill_color_);
 651                 p.drawRects((const QRectF*)(high_rects.data()), high_rects.size());
 652         }
 653
 654         p.setPen(LogicSignal::EdgeColor);
 655         p.drawLines(edge_lines, edge_count);
 656         delete[] edge_lines;
 657
 658         // Paint the caps
 659         const unsigned int max_cap_line_count = edges.size();
 660         QLineF *const cap_lines = new QLineF[max_cap_line_count];
 661
 662         p.setPen(LogicSignal::HighColor);
 663         paint_logic_caps(p, cap_lines, edges, true, samples_per_pixel,
 664                 pixels_offset, pp.left(), high_offset);
 665         p.setPen(LogicSignal::LowColor);
 666         paint_logic_caps(p, cap_lines, edges, false, samples_per_pixel,
 667                 pixels_offset, pp.left(), low_offset);
 668
 669         delete[] cap_lines;
 670
 671         // Paint the sampling points
 672         if (show_sampling_points) {
 673                 p.setPen(SamplingPointColor);
 674                 p.drawRects(sampling_points.data(), sampling_points.size());
 675         }
 676 }
 677
 678 void AnalogSignal::paint_logic_caps(QPainter &p, QLineF *const lines,
 679         vector< pair<int64_t, bool> > &edges, bool level,
 680         double samples_per_pixel, double pixels_offset, float x_offset,
 681         float y_offset)
 682 {
 683         QLineF *line = lines;
 684
 685         for (auto i = edges.begin(); i != (edges.end() - 1); i++)
 686                 if ((*i).second == level) {
 687                         *line++ = QLineF(
 688                                 ((*i).first / samples_per_pixel -
 689                                         pixels_offset) + x_offset, y_offset,
 690                                 ((*(i+1)).first / samples_per_pixel -
 691                                         pixels_offset) + x_offset, y_offset);
 692                 }
 693
 694         p.drawLines(lines, line - lines);
 695 }
 696
 697 shared_ptr<pv::data::AnalogSegment> AnalogSignal::get_analog_segment_to_paint() const
 698 {
 699         shared_ptr<pv::data::AnalogSegment> segment;
 700
 701         const deque< shared_ptr<pv::data::AnalogSegment> > &segments =
 702                 base_->analog_data()->analog_segments();
 703
 704         if (!segments.empty()) {
 705                 if (segment_display_mode_ == ShowLastSegmentOnly)
 706                         segment = segments.back();
 707
 708                 if ((segment_display_mode_ == ShowSingleSegmentOnly) ||
 709                                 (segment_display_mode_ == ShowLastCompleteSegmentOnly)) {
 710                         try {
 711                                 segment = segments.at(current_segment_);
 712                         } catch (out_of_range&) {
 713                                 qDebug() << "Current analog segment out of range for signal" << base_->name() << ":" << current_segment_;
 714                         }
 715                 }
 716         }
 717
 718         return segment;
 719 }
 720
 721 shared_ptr<pv::data::LogicSegment> AnalogSignal::get_logic_segment_to_paint() const
 722 {
 723         shared_ptr<pv::data::LogicSegment> segment;
 724
 725         const deque< shared_ptr<pv::data::LogicSegment> > &segments =
 726                 base_->logic_data()->logic_segments();
 727
 728         if (!segments.empty()) {
 729                 if (segment_display_mode_ == ShowLastSegmentOnly)
 730                         segment = segments.back();
 731
 732                 if ((segment_display_mode_ == ShowSingleSegmentOnly) ||
 733                                 (segment_display_mode_ == ShowLastCompleteSegmentOnly)) {
 734                         try {
 735                                 segment = segments.at(current_segment_);
 736                         } catch (out_of_range&) {
 737                                 qDebug() << "Current logic segment out of range for signal" << base_->name() << ":" << current_segment_;
 738                         }
 739                 }
 740         }
 741
 742         return segment;
 743 }
 744
 745 float AnalogSignal::get_resolution(int scale_index)
 746 {
 747         const float seq[] = {1.0f, 2.0f, 5.0f};
 748
 749         const int offset = numeric_limits<int>::max() / (2 * countof(seq));
 750         const div_t d = div((int)(scale_index + countof(seq) * offset),
 751                 countof(seq));
 752
 753         return powf(10.0f, d.quot - offset) * seq[d.rem];
 754 }
 755
 756 void AnalogSignal::update_scale()
 757 {
 758         resolution_ = get_resolution(scale_index_);
 759         scale_ = div_height_ / resolution_;
 760 }
 761
 762 void AnalogSignal::update_conversion_widgets()
 763 {
 764         SignalBase::ConversionType conv_type = base_->get_conversion_type();
 765
 766         // Enable or disable widgets depending on conversion state
 767         conv_threshold_cb_->setEnabled(conv_type != SignalBase::NoConversion);
 768         display_type_cb_->setEnabled(conv_type != SignalBase::NoConversion);
 769
 770         conv_threshold_cb_->clear();
 771
 772         vector < pair<QString, int> > presets = base_->get_conversion_presets();
 773
 774         // Prevent the combo box from firing the "edit text changed" signal
 775         // as that would involuntarily select the first entry
 776         conv_threshold_cb_->blockSignals(true);
 777
 778         // Set available options depending on chosen conversion
 779         for (pair<QString, int>& preset : presets)
 780                 conv_threshold_cb_->addItem(preset.first, preset.second);
 781
 782         map < QString, QVariant > options = base_->get_conversion_options();
 783
 784         if (conv_type == SignalBase::A2LConversionByThreshold) {
 785                 const vector<double> thresholds = base_->get_conversion_thresholds(
 786                                 SignalBase::A2LConversionByThreshold, true);
 787                 conv_threshold_cb_->addItem(
 788                                 QString("%1V").arg(QString::number(thresholds[0], 'f', 1)), -1);
 789         }
 790
 791         if (conv_type == SignalBase::A2LConversionBySchmittTrigger) {
 792                 const vector<double> thresholds = base_->get_conversion_thresholds(
 793                                 SignalBase::A2LConversionBySchmittTrigger, true);
 794                 conv_threshold_cb_->addItem(QString("%1V/%2V").arg(
 795                                 QString::number(thresholds[0], 'f', 1),
 796                                 QString::number(thresholds[1], 'f', 1)), -1);
 797         }
 798
 799         int preset_id = base_->get_current_conversion_preset();
 800         conv_threshold_cb_->setCurrentIndex(
 801                         conv_threshold_cb_->findData(preset_id));
 802
 803         conv_threshold_cb_->blockSignals(false);
 804 }
 805
 806 vector<data::LogicSegment::EdgePair> AnalogSignal::get_nearest_level_changes(uint64_t sample_pos)
 807 {
 808         assert(base_);
 809         assert(owner_);
 810
 811         // Return if there's no logic data or we're showing only the analog trace
 812         if (!base_->logic_data() || (display_type_ == DisplayAnalog))
 813                 return vector<data::LogicSegment::EdgePair>();
 814
 815         if (sample_pos == 0)
 816                 return vector<LogicSegment::EdgePair>();
 817
 818         shared_ptr<LogicSegment> segment = get_logic_segment_to_paint();
 819         if (!segment || (segment->get_sample_count() == 0))
 820                 return vector<LogicSegment::EdgePair>();
 821
 822         const View *view = owner_->view();
 823         assert(view);
 824         const double samples_per_pixel = base_->get_samplerate() * view->scale();
 825
 826         vector<LogicSegment::EdgePair> edges;
 827
 828         segment->get_surrounding_edges(edges, sample_pos,
 829                 samples_per_pixel / LogicSignal::Oversampling, 0);
 830
 831         if (edges.empty())
 832                 return vector<LogicSegment::EdgePair>();
 833
 834         return edges;
 835 }
 836
 837 void AnalogSignal::perform_autoranging(bool keep_divs, bool force_update)
 838 {
 839         const deque< shared_ptr<pv::data::AnalogSegment> > &segments =
 840                 base_->analog_data()->analog_segments();
 841
 842         if (segments.empty())
 843                 return;
 844
 845         static double prev_min = 0, prev_max = 0;
 846         double min = 0, max = 0;
 847
 848         for (const shared_ptr<pv::data::AnalogSegment>& segment : segments) {
 849                 pair<double, double> mm = segment->get_min_max();
 850                 min = std::min(min, mm.first);
 851                 max = std::max(max, mm.second);
 852         }
 853
 854         if ((min == prev_min) && (max == prev_max) && !force_update)
 855                 return;
 856
 857         prev_min = min;
 858         prev_max = max;
 859
 860         // If we're allowed to alter the div assignment...
 861         if (!keep_divs) {
 862                 // Use all divs for the positive range if there are no negative values
 863                 if ((min == 0) && (neg_vdivs_ > 0)) {
 864                         pos_vdivs_ += neg_vdivs_;
 865                         neg_vdivs_ = 0;
 866                 }
 867
 868                 // Split up the divs if there are negative values but no negative divs
 869                 if ((min < 0) && (neg_vdivs_ == 0)) {
 870                         neg_vdivs_ = pos_vdivs_ / 2;
 871                         pos_vdivs_ -= neg_vdivs_;
 872                 }
 873         }
 874
 875         // If there is still no positive div when we need it, add one
 876         // (this can happen when pos_vdivs==neg_vdivs==0)
 877         if ((max > 0) && (pos_vdivs_ == 0)) {
 878                 pos_vdivs_ = 1;
 879                 owner_->extents_changed(false, true);
 880         }
 881
 882         // If there is still no negative div when we need it, add one
 883         // (this can happen when pos_vdivs was 0 or 1 when trying to split)
 884         if ((min < 0) && (neg_vdivs_ == 0)) {
 885                 neg_vdivs_ = 1;
 886                 owner_->extents_changed(false, true);
 887         }
 888
 889         double min_value_per_div;
 890         if ((pos_vdivs_ > 0) && (neg_vdivs_ >  0))
 891                 min_value_per_div = std::max(max / pos_vdivs_, -min / neg_vdivs_);
 892         else if (pos_vdivs_ > 0)
 893                 min_value_per_div = max / pos_vdivs_;
 894         else
 895                 min_value_per_div = -min / neg_vdivs_;
 896
 897         // Find first scale value that is bigger than the value we need
 898         for (int i = MinScaleIndex; i < MaxScaleIndex; i++)
 899                 if (get_resolution(i) > min_value_per_div) {
 900                         scale_index_ = i;
 901                         break;
 902                 }
 903
 904         update_scale();
 905 }
 906
 907 void AnalogSignal::reset_pixel_values()
 908 {
 909         value_at_pixel_pos_.clear();
 910         current_pixel_pos_ = -1;
 911         prev_value_at_pixel_ = std::numeric_limits<float>::quiet_NaN();
 912 }
 913
 914 void AnalogSignal::process_next_sample_value(float x, float value)
 915 {
 916         // Note: NAN is used to indicate the non-existance of a value at this pixel
 917
 918         if (std::isnan(prev_value_at_pixel_)) {
 919                 if (x < 0) {
 920                         min_value_at_pixel_ = value;
 921                         max_value_at_pixel_ = value;
 922                         prev_value_at_pixel_ = value;
 923                         current_pixel_pos_ = x;
 924                 } else
 925                         prev_value_at_pixel_ = std::numeric_limits<float>::quiet_NaN();
 926         }
 927
 928         const int pixel_pos = (int)(x + 0.5);
 929
 930         if (pixel_pos > current_pixel_pos_) {
 931                 if (pixel_pos - current_pixel_pos_ == 1) {
 932                         if (std::isnan(prev_value_at_pixel_)) {
 933                                 value_at_pixel_pos_.push_back(prev_value_at_pixel_);
 934                         } else {
 935                                 // Average the min/max range to create one value for the previous pixel
 936                                 const float avg = (min_value_at_pixel_ + max_value_at_pixel_) / 2;
 937                                 value_at_pixel_pos_.push_back(avg);
 938                         }
 939                 } else {
 940                         // Interpolate values to create values for the intermediate pixels
 941                         const float start_value = prev_value_at_pixel_;
 942                         const float end_value = value;
 943                         const int steps = fabs(pixel_pos - current_pixel_pos_);
 944                         const double gradient = (end_value - start_value) / steps;
 945                         for (int i = 0; i < steps; i++) {
 946                                 if (current_pixel_pos_ + i < 0)
 947                                         continue;
 948                                 value_at_pixel_pos_.push_back(start_value + i * gradient);
 949                         }
 950                 }
 951
 952                 min_value_at_pixel_ = value;
 953                 max_value_at_pixel_ = value;
 954                 prev_value_at_pixel_ = value;
 955                 current_pixel_pos_ = pixel_pos;
 956         } else {
 957                 // Another sample for the same pixel
 958                 if (value < min_value_at_pixel_)
 959                         min_value_at_pixel_ = value;
 960                 if (value > max_value_at_pixel_)
 961                         max_value_at_pixel_ = value;
 962         }
 963 }
 964
 965 void AnalogSignal::populate_popup_form(QWidget *parent, QFormLayout *form)
 966 {
 967         // Add the standard options
 968         Signal::populate_popup_form(parent, form);
 969
 970         QFormLayout *const layout = new QFormLayout;
 971
 972         // Add div-related settings
 973         pvdiv_sb_ = new QSpinBox(parent);
 974         pvdiv_sb_->setRange(0, MaximumVDivs);
 975         pvdiv_sb_->setValue(pos_vdivs_);
 976         connect(pvdiv_sb_, SIGNAL(valueChanged(int)),
 977                 this, SLOT(on_pos_vdivs_changed(int)));
 978         layout->addRow(tr("Number of pos vertical divs"), pvdiv_sb_);
 979
 980         nvdiv_sb_ = new QSpinBox(parent);
 981         nvdiv_sb_->setRange(0, MaximumVDivs);
 982         nvdiv_sb_->setValue(neg_vdivs_);
 983         connect(nvdiv_sb_, SIGNAL(valueChanged(int)),
 984                 this, SLOT(on_neg_vdivs_changed(int)));
 985         layout->addRow(tr("Number of neg vertical divs"), nvdiv_sb_);
 986
 987         div_height_sb_ = new QSpinBox(parent);
 988         div_height_sb_->setRange(20, 1000);
 989         div_height_sb_->setSingleStep(5);
 990         div_height_sb_->setSuffix(tr(" pixels"));
 991         div_height_sb_->setValue(div_height_);
 992         connect(div_height_sb_, SIGNAL(valueChanged(int)),
 993                 this, SLOT(on_div_height_changed(int)));
 994         layout->addRow(tr("Div height"), div_height_sb_);
 995
 996         // Add the vertical resolution
 997         resolution_cb_ = new QComboBox(parent);
 998
 999         for (int i = MinScaleIndex; i < MaxScaleIndex; i++) {
1000                 const QString label = QString("%1").arg(get_resolution(i));
1001                 resolution_cb_->insertItem(0, label, QVariant(i));
1002         }
1003
1004         int cur_idx = resolution_cb_->findData(QVariant(scale_index_));
1005         resolution_cb_->setCurrentIndex(cur_idx);
1006
1007         connect(resolution_cb_, SIGNAL(currentIndexChanged(int)),
1008                 this, SLOT(on_resolution_changed(int)));
1009
1010         QGridLayout *const vdiv_layout = new QGridLayout;
1011         QLabel *const vdiv_unit = new QLabel(tr("V/div"));
1012         vdiv_layout->addWidget(resolution_cb_, 0, 0);
1013         vdiv_layout->addWidget(vdiv_unit, 0, 1);
1014
1015         layout->addRow(tr("Vertical resolution"), vdiv_layout);
1016
1017         // Add the autoranging checkbox
1018         QCheckBox* autoranging_cb = new QCheckBox();
1019         autoranging_cb->setCheckState(autoranging_ ? Qt::Checked : Qt::Unchecked);
1020
1021         connect(autoranging_cb, SIGNAL(stateChanged(int)),
1022                 this, SLOT(on_autoranging_changed(int)));
1023
1024         layout->addRow(tr("Autoranging"), autoranging_cb);
1025
1026         // Add the conversion type dropdown
1027         conversion_cb_ = new QComboBox();
1028
1029         conversion_cb_->addItem(tr("none"),
1030                 SignalBase::NoConversion);
1031         conversion_cb_->addItem(tr("to logic via threshold"),
1032                 SignalBase::A2LConversionByThreshold);
1033         conversion_cb_->addItem(tr("to logic via schmitt-trigger"),
1034                 SignalBase::A2LConversionBySchmittTrigger);
1035
1036         cur_idx = conversion_cb_->findData(QVariant(base_->get_conversion_type()));
1037         conversion_cb_->setCurrentIndex(cur_idx);
1038
1039         layout->addRow(tr("Conversion"), conversion_cb_);
1040
1041         connect(conversion_cb_, SIGNAL(currentIndexChanged(int)),
1042                 this, SLOT(on_conversion_changed(int)));
1043
1044     // Add the conversion threshold settings
1045     conv_threshold_cb_ = new QComboBox();
1046     conv_threshold_cb_->setEditable(true);
1047
1048     layout->addRow(tr("Conversion threshold(s)"), conv_threshold_cb_);
1049
1050     connect(conv_threshold_cb_, SIGNAL(currentIndexChanged(int)),
1051             this, SLOT(on_conv_threshold_changed(int)));
1052     connect(conv_threshold_cb_, SIGNAL(editTextChanged(const QString&)),
1053             this, SLOT(on_conv_threshold_changed()));  // index will be -1
1054
1055         // Add the display type dropdown
1056         display_type_cb_ = new QComboBox();
1057
1058         display_type_cb_->addItem(tr("analog"), DisplayAnalog);
1059         display_type_cb_->addItem(tr("converted"), DisplayConverted);
1060         display_type_cb_->addItem(tr("analog+converted"), DisplayBoth);
1061
1062         cur_idx = display_type_cb_->findData(QVariant(display_type_));
1063         display_type_cb_->setCurrentIndex(cur_idx);
1064
1065         layout->addRow(tr("Show traces for"), display_type_cb_);
1066
1067         connect(display_type_cb_, SIGNAL(currentIndexChanged(int)),
1068                 this, SLOT(on_display_type_changed(int)));
1069
1070         // Update the conversion widget contents and states
1071         update_conversion_widgets();
1072
1073         form->addRow(layout);
1074 }
1075
1076 void AnalogSignal::hover_point_changed(const QPoint &hp)
1077 {
1078         Signal::hover_point_changed(hp);
1079
1080         // Note: Even though the view area begins at 0, we exclude 0 because
1081         // that's also the value given when the cursor is over the header to the
1082         // left of the trace paint area
1083         if (hp.x() <= 0) {
1084                 value_at_hover_pos_ = std::numeric_limits<float>::quiet_NaN();
1085         } else {
1086                 try {
1087                         value_at_hover_pos_ = value_at_pixel_pos_.at(hp.x());
1088                 } catch (out_of_range&) {
1089                         value_at_hover_pos_ = std::numeric_limits<float>::quiet_NaN();
1090                 }
1091         }
1092 }
1093
1094 void AnalogSignal::on_setting_changed(const QString &key, const QVariant &value)
1095 {
1096         Signal::on_setting_changed(key, value);
1097
1098         if (key == GlobalSettings::Key_View_ShowSamplingPoints)
1099                 show_sampling_points_ = value.toBool();
1100
1101         if (key == GlobalSettings::Key_View_FillSignalHighAreas)
1102                 fill_high_areas_ = value.toBool();
1103
1104         if (key == GlobalSettings::Key_View_FillSignalHighAreaColor)
1105                 high_fill_color_ = QColor::fromRgba(value.value<uint32_t>());
1106
1107         if (key == GlobalSettings::Key_View_ShowAnalogMinorGrid)
1108                 show_analog_minor_grid_ = value.toBool();
1109
1110         if (key == GlobalSettings::Key_View_ConversionThresholdDispMode) {
1111                 conversion_threshold_disp_mode_ = value.toInt();
1112
1113                 if (owner_)
1114                         owner_->row_item_appearance_changed(false, true);
1115         }
1116 }
1117
1118 void AnalogSignal::on_min_max_changed(float min, float max)
1119 {
1120         (void)min;
1121         (void)max;
1122
1123         if (autoranging_)
1124                 perform_autoranging(false, false);
1125 }
1126
1127 void AnalogSignal::on_pos_vdivs_changed(int vdivs)
1128 {
1129         if (vdivs == pos_vdivs_)
1130                 return;
1131
1132         pos_vdivs_ = vdivs;
1133
1134         // There has to be at least one div, positive or negative
1135         if ((neg_vdivs_ == 0) && (pos_vdivs_ == 0)) {
1136                 pos_vdivs_ = 1;
1137                 if (pvdiv_sb_)
1138                         pvdiv_sb_->setValue(pos_vdivs_);
1139         }
1140
1141         if (autoranging_) {
1142                 perform_autoranging(true, true);
1143
1144                 // It could be that a positive or negative div was added, so update
1145                 if (pvdiv_sb_) {
1146                         pvdiv_sb_->setValue(pos_vdivs_);
1147                         nvdiv_sb_->setValue(neg_vdivs_);
1148                 }
1149         }
1150
1151         if (owner_) {
1152                 // Call order is important, otherwise the lazy event handler won't work
1153                 owner_->extents_changed(false, true);
1154                 owner_->row_item_appearance_changed(false, true);
1155         }
1156 }
1157
1158 void AnalogSignal::on_neg_vdivs_changed(int vdivs)
1159 {
1160         if (vdivs == neg_vdivs_)
1161                 return;
1162
1163         neg_vdivs_ = vdivs;
1164
1165         // There has to be at least one div, positive or negative
1166         if ((neg_vdivs_ == 0) && (pos_vdivs_ == 0)) {
1167                 pos_vdivs_ = 1;
1168                 if (pvdiv_sb_)
1169                         pvdiv_sb_->setValue(pos_vdivs_);
1170         }
1171
1172         if (autoranging_) {
1173                 perform_autoranging(true, true);
1174
1175                 // It could be that a positive or negative div was added, so update
1176                 if (pvdiv_sb_) {
1177                         pvdiv_sb_->setValue(pos_vdivs_);
1178                         nvdiv_sb_->setValue(neg_vdivs_);
1179                 }
1180         }
1181
1182         if (owner_) {
1183                 // Call order is important, otherwise the lazy event handler won't work
1184                 owner_->extents_changed(false, true);
1185                 owner_->row_item_appearance_changed(false, true);
1186         }
1187 }
1188
1189 void AnalogSignal::on_div_height_changed(int height)
1190 {
1191         div_height_ = height;
1192         update_scale();
1193
1194         if (owner_) {
1195                 // Call order is important, otherwise the lazy event handler won't work
1196                 owner_->extents_changed(false, true);
1197                 owner_->row_item_appearance_changed(false, true);
1198         }
1199 }
1200
1201 void AnalogSignal::on_resolution_changed(int index)
1202 {
1203         scale_index_ = resolution_cb_->itemData(index).toInt();
1204         update_scale();
1205
1206         if (owner_)
1207                 owner_->row_item_appearance_changed(false, true);
1208 }
1209
1210 void AnalogSignal::on_autoranging_changed(int state)
1211 {
1212         autoranging_ = (state == Qt::Checked);
1213
1214         if (autoranging_)
1215                 perform_autoranging(false, true);
1216
1217         if (owner_) {
1218                 // Call order is important, otherwise the lazy event handler won't work
1219                 owner_->extents_changed(false, true);
1220                 owner_->row_item_appearance_changed(false, true);
1221         }
1222 }
1223
1224 void AnalogSignal::on_conversion_changed(int index)
1225 {
1226         SignalBase::ConversionType old_conv_type = base_->get_conversion_type();
1227
1228         SignalBase::ConversionType conv_type =
1229                 (SignalBase::ConversionType)(conversion_cb_->itemData(index).toInt());
1230
1231         if (conv_type != old_conv_type) {
1232                 base_->set_conversion_type(conv_type);
1233                 update_conversion_widgets();
1234
1235                 if (owner_)
1236                         owner_->row_item_appearance_changed(false, true);
1237         }
1238 }
1239
1240 void AnalogSignal::on_conv_threshold_changed(int index)
1241 {
1242         SignalBase::ConversionType conv_type = base_->get_conversion_type();
1243
1244         // Note: index is set to -1 if the text in the combo box matches none of
1245         // the entries in the combo box
1246
1247         if ((index == -1) && (conv_threshold_cb_->currentText().length() == 0))
1248                 return;
1249
1250         // The combo box entry with the custom value has user_data set to -1
1251         const int user_data = conv_threshold_cb_->findText(
1252                         conv_threshold_cb_->currentText());
1253
1254         const bool use_custom_thr = (index == -1) || (user_data == -1);
1255
1256         if (conv_type == SignalBase::A2LConversionByThreshold && use_custom_thr) {
1257                 // Not one of the preset values, try to parse the combo box text
1258                 // Note: Regex loosely based on
1259                 // https://txt2re.com/index-c++.php3?s=0.1V&1&-13
1260                 QString re1 = "([+-]?\\d*[\\.,]?\\d*)"; // Float value
1261                 QString re2 = "([a-zA-Z]*)"; // SI unit
1262                 QRegExp regex(re1 + re2);
1263
1264                 const QString text = conv_threshold_cb_->currentText();
1265                 if (!regex.exactMatch(text))
1266                         return;  // String doesn't match the regex
1267
1268                 QStringList tokens = regex.capturedTexts();
1269
1270                 // For now, we simply assume that the unit is volt without modifiers
1271                 const double thr = tokens.at(1).toDouble();
1272
1273                 // Only restart the conversion if the threshold was updated.
1274                 // We're starting a delayed conversion because the user may still be
1275                 // typing and the UI would lag if we kept on restarting it immediately
1276                 if (base_->set_conversion_option("threshold_value", thr))
1277                         base_->start_conversion(true);
1278         }
1279
1280         if (conv_type == SignalBase::A2LConversionBySchmittTrigger && use_custom_thr) {
1281                 // Not one of the preset values, try to parse the combo box text
1282                 // Note: Regex loosely based on
1283                 // https://txt2re.com/index-c++.php3?s=0.1V/0.2V&2&14&-22&3&15
1284                 QString re1 = "([+-]?\\d*[\\.,]?\\d*)"; // Float value
1285                 QString re2 = "([a-zA-Z]*)"; // SI unit
1286                 QString re3 = "\\/"; // Forward slash, not captured
1287                 QString re4 = "([+-]?\\d*[\\.,]?\\d*)"; // Float value
1288                 QString re5 = "([a-zA-Z]*)"; // SI unit
1289                 QRegExp regex(re1 + re2 + re3 + re4 + re5);
1290
1291                 const QString text = conv_threshold_cb_->currentText();
1292                 if (!regex.exactMatch(text))
1293                         return;  // String doesn't match the regex
1294
1295                 QStringList tokens = regex.capturedTexts();
1296
1297                 // For now, we simply assume that the unit is volt without modifiers
1298                 const double low_thr = tokens.at(1).toDouble();
1299                 const double high_thr = tokens.at(3).toDouble();
1300
1301                 // Only restart the conversion if one of the options was updated.
1302                 // We're starting a delayed conversion because the user may still be
1303                 // typing and the UI would lag if we kept on restarting it immediately
1304                 bool o1 = base_->set_conversion_option("threshold_value_low", low_thr);
1305                 bool o2 = base_->set_conversion_option("threshold_value_high", high_thr);
1306                 if (o1 || o2)
1307                         base_->start_conversion(true);  // Start delayed conversion
1308         }
1309
1310         base_->set_conversion_preset((SignalBase::ConversionPreset)index);
1311
1312         // Immediately start the conversion if we're not using custom values
1313         // (i.e. we're using one of the presets)
1314         if (!use_custom_thr)
1315                 base_->start_conversion();
1316 }
1317
1318 void AnalogSignal::on_delayed_conversion_starter()
1319 {
1320         base_->start_conversion();
1321 }
1322
1323 void AnalogSignal::on_display_type_changed(int index)
1324 {
1325         display_type_ = (DisplayType)(display_type_cb_->itemData(index).toInt());
1326
1327         if (owner_)
1328                 owner_->row_item_appearance_changed(false, true);
1329 }
1330
1331 } // namespace trace
1332 } // namespace views
1333 } // namespace pv