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 <QFormLayout>
  32 #include <QGridLayout>
  33 #include <QLabel>
  34 #include <QString>
  35
  36 #include "analogsignal.hpp"
  37 #include "logicsignal.hpp"
  38 #include "view.hpp"
  39
  40 #include "pv/data/analog.hpp"
  41 #include "pv/data/analogsegment.hpp"
  42 #include "pv/data/logic.hpp"
  43 #include "pv/data/logicsegment.hpp"
  44 #include "pv/data/signalbase.hpp"
  45 #include "pv/globalsettings.hpp"
  46
  47 #include <libsigrokcxx/libsigrokcxx.hpp>
  48
  49 using std::bind;
  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::pair;
  58 using std::placeholders::_1;
  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::SignalColours[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::SamplingPointColour(0x77, 0x77, 0x77);
  80 const QColor AnalogSignal::SamplingPointColourLo = QColor(200, 0, 0, 80 * 256 / 100);
  81 const QColor AnalogSignal::SamplingPointColourNe = QColor(0,   0, 0, 80 * 256 / 100);
  82 const QColor AnalogSignal::SamplingPointColourHi = 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::register_change_handler(GlobalSettings::Key_View_ConversionThresholdDispMode,
 120                 bind(&AnalogSignal::on_settingViewConversionThresholdDispMode_changed, this, _1));
 121
 122         GlobalSettings gs;
 123         conversion_threshold_disp_mode_ =
 124                 gs.value(GlobalSettings::Key_View_ConversionThresholdDispMode).toInt();
 125
 126         div_height_ = gs.value(GlobalSettings::Key_View_DefaultDivHeight).toInt();
 127
 128         base_->set_colour(SignalColours[base_->index() % countof(SignalColours)]);
 129         update_scale();
 130 }
 131
 132 shared_ptr<pv::data::SignalData> AnalogSignal::data() const
 133 {
 134         return base_->analog_data();
 135 }
 136
 137 void AnalogSignal::save_settings(QSettings &settings) const
 138 {
 139         settings.setValue("pos_vdivs", pos_vdivs_);
 140         settings.setValue("neg_vdivs", neg_vdivs_);
 141         settings.setValue("scale_index", scale_index_);
 142         settings.setValue("display_type", display_type_);
 143         settings.setValue("autoranging", autoranging_);
 144         settings.setValue("div_height", div_height_);
 145 }
 146
 147 void AnalogSignal::restore_settings(QSettings &settings)
 148 {
 149         if (settings.contains("pos_vdivs"))
 150                 pos_vdivs_ = settings.value("pos_vdivs").toInt();
 151
 152         if (settings.contains("neg_vdivs"))
 153                 neg_vdivs_ = settings.value("neg_vdivs").toInt();
 154
 155         if (settings.contains("scale_index")) {
 156                 scale_index_ = settings.value("scale_index").toInt();
 157                 update_scale();
 158         }
 159
 160         if (settings.contains("display_type"))
 161                 display_type_ = (DisplayType)(settings.value("display_type").toInt());
 162
 163         if (settings.contains("autoranging"))
 164                 autoranging_ = settings.value("autoranging").toBool();
 165
 166         if (settings.contains("div_height")) {
 167                 const int old_height = div_height_;
 168                 div_height_ = settings.value("div_height").toInt();
 169
 170                 if ((div_height_ != old_height) && owner_) {
 171                         // Call order is important, otherwise the lazy event handler won't work
 172                         owner_->extents_changed(false, true);
 173                         owner_->row_item_appearance_changed(false, true);
 174                 }
 175         }
 176 }
 177
 178 pair<int, int> AnalogSignal::v_extents() const
 179 {
 180         const int ph = pos_vdivs_ * div_height_;
 181         const int nh = neg_vdivs_ * div_height_;
 182         return make_pair(-ph, nh);
 183 }
 184
 185 int AnalogSignal::scale_handle_offset() const
 186 {
 187         const int h = (pos_vdivs_ + neg_vdivs_) * div_height_;
 188
 189         return ((scale_index_drag_offset_ - scale_index_) * h / 4) - h / 2;
 190 }
 191
 192 void AnalogSignal::scale_handle_dragged(int offset)
 193 {
 194         const int h = (pos_vdivs_ + neg_vdivs_) * div_height_;
 195
 196         scale_index_ = scale_index_drag_offset_ - (offset + h / 2) / (h / 4);
 197
 198         update_scale();
 199 }
 200
 201 void AnalogSignal::scale_handle_drag_release()
 202 {
 203         scale_index_drag_offset_ = scale_index_;
 204         update_scale();
 205 }
 206
 207 void AnalogSignal::paint_back(QPainter &p, ViewItemPaintParams &pp)
 208 {
 209         if (!base_->enabled())
 210                 return;
 211
 212         bool paint_thr_bg =
 213                 conversion_threshold_disp_mode_ == GlobalSettings::ConvThrDispMode_Background;
 214
 215         const vector<double> thresholds = base_->get_conversion_thresholds();
 216
 217         // Only display thresholds if we have some and we show analog samples
 218         if ((thresholds.size() > 0) && paint_thr_bg &&
 219                 ((display_type_ == DisplayAnalog) || (display_type_ == DisplayBoth))) {
 220
 221                 const int visual_y = get_visual_y();
 222                 const pair<int, int> extents = v_extents();
 223                 const int top = visual_y + extents.first;
 224                 const int btm = visual_y + extents.second;
 225
 226                 // Draw high/neutral/low areas
 227                 if (thresholds.size() == 2) {
 228                         int thr_lo = visual_y - thresholds[0] * scale_;
 229                         int thr_hi = visual_y - thresholds[1] * scale_;
 230                         thr_lo = min(max(thr_lo, top), btm);
 231                         thr_hi = min(max(thr_hi, top), btm);
 232
 233                         p.fillRect(QRectF(pp.left(), top, pp.width(), thr_hi - top),
 234                                 QBrush(ThresholdColorHi));
 235                         p.fillRect(QRectF(pp.left(), thr_hi, pp.width(), thr_lo - thr_hi),
 236                                 QBrush(ThresholdColorNe));
 237                         p.fillRect(QRectF(pp.left(), thr_lo, pp.width(), btm - thr_lo),
 238                                 QBrush(ThresholdColorLo));
 239                 } else {
 240                         int thr = visual_y - thresholds[0] * scale_;
 241                         thr = min(max(thr, top), btm);
 242
 243                         p.fillRect(QRectF(pp.left(), top, pp.width(), thr - top),
 244                                 QBrush(ThresholdColorHi));
 245                         p.fillRect(QRectF(pp.left(), thr, pp.width(), btm - thr),
 246                                 QBrush(ThresholdColorLo));
 247                 }
 248
 249                 paint_axis(p, pp, get_visual_y());
 250         } else {
 251                 Trace::paint_back(p, pp);
 252                 paint_axis(p, pp, get_visual_y());
 253         }
 254 }
 255
 256 void AnalogSignal::paint_mid(QPainter &p, ViewItemPaintParams &pp)
 257 {
 258         assert(base_->analog_data());
 259         assert(owner_);
 260
 261         const int y = get_visual_y();
 262
 263         if (!base_->enabled())
 264                 return;
 265
 266         if ((display_type_ == DisplayAnalog) || (display_type_ == DisplayBoth)) {
 267                 paint_grid(p, y, pp.left(), pp.right());
 268
 269                 const deque< shared_ptr<pv::data::AnalogSegment> > &segments =
 270                         base_->analog_data()->analog_segments();
 271                 if (segments.empty())
 272                         return;
 273
 274                 const shared_ptr<pv::data::AnalogSegment> &segment =
 275                         segments.front();
 276
 277                 const double pixels_offset = pp.pixels_offset();
 278                 const double samplerate = max(1.0, segment->samplerate());
 279                 const pv::util::Timestamp& start_time = segment->start_time();
 280                 const int64_t last_sample = segment->get_sample_count() - 1;
 281                 const double samples_per_pixel = samplerate * pp.scale();
 282                 const pv::util::Timestamp start = samplerate * (pp.offset() - start_time);
 283                 const pv::util::Timestamp end = start + samples_per_pixel * pp.width();
 284
 285                 const int64_t start_sample = min(max(floor(start).convert_to<int64_t>(),
 286                         (int64_t)0), last_sample);
 287                 const int64_t end_sample = min(max((ceil(end) + 1).convert_to<int64_t>(),
 288                         (int64_t)0), last_sample);
 289
 290                 if (samples_per_pixel < EnvelopeThreshold)
 291                         paint_trace(p, segment, y, pp.left(),
 292                                 start_sample, end_sample,
 293                                 pixels_offset, samples_per_pixel);
 294                 else
 295                         paint_envelope(p, segment, y, pp.left(),
 296                                 start_sample, end_sample,
 297                                 pixels_offset, samples_per_pixel);
 298         }
 299
 300         if ((display_type_ == DisplayConverted) || (display_type_ == DisplayBoth))
 301                 paint_logic_mid(p, pp);
 302 }
 303
 304 void AnalogSignal::paint_fore(QPainter &p, ViewItemPaintParams &pp)
 305 {
 306         if (!enabled())
 307                 return;
 308
 309         if ((display_type_ == DisplayAnalog) || (display_type_ == DisplayBoth)) {
 310                 const int y = get_visual_y();
 311
 312                 // Show the info section on the right side of the trace
 313                 const QString infotext = QString("%1 V/div").arg(resolution_);
 314
 315                 p.setPen(base_->colour());
 316                 p.setFont(QApplication::font());
 317
 318                 const QRectF bounding_rect = QRectF(pp.left(),
 319                                 y + v_extents().first,
 320                                 pp.width() - InfoTextMarginRight,
 321                                 v_extents().second - v_extents().first - InfoTextMarginBottom);
 322
 323                 p.drawText(bounding_rect, Qt::AlignRight | Qt::AlignBottom, infotext);
 324         }
 325 }
 326
 327 void AnalogSignal::paint_grid(QPainter &p, int y, int left, int right)
 328 {
 329         p.setRenderHint(QPainter::Antialiasing, false);
 330
 331         GlobalSettings settings;
 332         const bool show_analog_minor_grid =
 333                 settings.value(GlobalSettings::Key_View_ShowAnalogMinorGrid).toBool();
 334
 335         if (pos_vdivs_ > 0) {
 336                 p.setPen(QPen(GridMajorColor, 1, Qt::DashLine));
 337                 for (int i = 1; i <= pos_vdivs_; i++) {
 338                         const float dy = i * div_height_;
 339                         p.drawLine(QLineF(left, y - dy, right, y - dy));
 340                 }
 341         }
 342
 343         if ((pos_vdivs_ > 0) && show_analog_minor_grid) {
 344                 p.setPen(QPen(GridMinorColor, 1, Qt::DashLine));
 345                 for (int i = 0; i < pos_vdivs_; i++) {
 346                         const float dy = i * div_height_;
 347                         const float dy25 = dy + (0.25 * div_height_);
 348                         const float dy50 = dy + (0.50 * div_height_);
 349                         const float dy75 = dy + (0.75 * div_height_);
 350                         p.drawLine(QLineF(left, y - dy25, right, y - dy25));
 351                         p.drawLine(QLineF(left, y - dy50, right, y - dy50));
 352                         p.drawLine(QLineF(left, y - dy75, right, y - dy75));
 353                 }
 354         }
 355
 356         if (neg_vdivs_ > 0) {
 357                 p.setPen(QPen(GridMajorColor, 1, Qt::DashLine));
 358                 for (int i = 1; i <= neg_vdivs_; i++) {
 359                         const float dy = i * div_height_;
 360                         p.drawLine(QLineF(left, y + dy, right, y + dy));
 361                 }
 362         }
 363
 364         if ((pos_vdivs_ > 0) && show_analog_minor_grid) {
 365                 p.setPen(QPen(GridMinorColor, 1, Qt::DashLine));
 366                 for (int i = 0; i < neg_vdivs_; i++) {
 367                         const float dy = i * div_height_;
 368                         const float dy25 = dy + (0.25 * div_height_);
 369                         const float dy50 = dy + (0.50 * div_height_);
 370                         const float dy75 = dy + (0.75 * div_height_);
 371                         p.drawLine(QLineF(left, y + dy25, right, y + dy25));
 372                         p.drawLine(QLineF(left, y + dy50, right, y + dy50));
 373                         p.drawLine(QLineF(left, y + dy75, right, y + dy75));
 374                 }
 375         }
 376
 377         p.setRenderHint(QPainter::Antialiasing, true);
 378 }
 379
 380 void AnalogSignal::paint_trace(QPainter &p,
 381         const shared_ptr<pv::data::AnalogSegment> &segment,
 382         int y, int left, const int64_t start, const int64_t end,
 383         const double pixels_offset, const double samples_per_pixel)
 384 {
 385         if (end <= start)
 386                 return;
 387
 388         bool paint_thr_dots =
 389                 (base_->get_conversion_type() != data::SignalBase::NoConversion) &&
 390                 (conversion_threshold_disp_mode_ == GlobalSettings::ConvThrDispMode_Dots);
 391
 392         vector<double> thresholds;
 393         if (paint_thr_dots)
 394                 thresholds = base_->get_conversion_thresholds();
 395
 396         // Calculate and paint the sampling points if enabled and useful
 397         GlobalSettings settings;
 398         const bool show_sampling_points =
 399                 (settings.value(GlobalSettings::Key_View_ShowSamplingPoints).toBool() ||
 400                 paint_thr_dots) && (samples_per_pixel < 0.25);
 401
 402         p.setPen(base_->colour());
 403
 404         const int64_t points_count = end - start;
 405
 406         QPointF *points = new QPointF[points_count];
 407         QPointF *point = points;
 408
 409         vector<QRectF> sampling_points[3];
 410
 411         int64_t sample_count = min(points_count, TracePaintBlockSize);
 412         int64_t block_sample = 0;
 413         float *sample_block = new float[TracePaintBlockSize];
 414         segment->get_samples(start, start + sample_count, sample_block);
 415
 416         const int w = 2;
 417         for (int64_t sample = start; sample != end; sample++, block_sample++) {
 418
 419                 if (block_sample == TracePaintBlockSize) {
 420                         block_sample = 0;
 421                         sample_count = min(points_count - sample, TracePaintBlockSize);
 422                         segment->get_samples(sample, sample + sample_count, sample_block);
 423                 }
 424
 425                 const float x = (sample / samples_per_pixel -
 426                         pixels_offset) + left;
 427
 428                 *point++ = QPointF(x, y - sample_block[block_sample] * scale_);
 429
 430                 if (show_sampling_points) {
 431                         int idx = 0;  // Neutral
 432
 433                         if (paint_thr_dots) {
 434                                 if (thresholds.size() == 1)
 435                                         idx = (sample_block[block_sample] >= thresholds[0]) ? 2 : 1;
 436                                 else if (thresholds.size() == 2) {
 437                                         if (sample_block[block_sample] > thresholds[1])
 438                                                 idx = 2;  // High
 439                                         else if (sample_block[block_sample] < thresholds[0])
 440                                                 idx = 1;  // Low
 441                                 }
 442                         }
 443
 444                         sampling_points[idx].push_back(
 445                                 QRectF(x - (w / 2), y - sample_block[block_sample] * scale_ - (w / 2), w, w));
 446                 }
 447         }
 448         delete[] sample_block;
 449
 450         p.drawPolyline(points, points_count);
 451
 452         if (show_sampling_points) {
 453                 if (paint_thr_dots) {
 454                         p.setPen(SamplingPointColourNe);
 455                         p.drawRects(sampling_points[0].data(), sampling_points[0].size());
 456                         p.setPen(SamplingPointColourLo);
 457                         p.drawRects(sampling_points[1].data(), sampling_points[1].size());
 458                         p.setPen(SamplingPointColourHi);
 459                         p.drawRects(sampling_points[2].data(), sampling_points[2].size());
 460                 } else {
 461                         p.setPen(SamplingPointColour);
 462                         p.drawRects(sampling_points[0].data(), sampling_points[0].size());
 463                 }
 464         }
 465
 466         delete[] points;
 467 }
 468
 469 void AnalogSignal::paint_envelope(QPainter &p,
 470         const shared_ptr<pv::data::AnalogSegment> &segment,
 471         int y, int left, const int64_t start, const int64_t end,
 472         const double pixels_offset, const double samples_per_pixel)
 473 {
 474         using pv::data::AnalogSegment;
 475
 476         AnalogSegment::EnvelopeSection e;
 477         segment->get_envelope_section(e, start, end, samples_per_pixel);
 478
 479         if (e.length < 2)
 480                 return;
 481
 482         p.setPen(QPen(Qt::NoPen));
 483         p.setBrush(base_->colour());
 484
 485         QRectF *const rects = new QRectF[e.length];
 486         QRectF *rect = rects;
 487
 488         for (uint64_t sample = 0; sample < e.length - 1; sample++) {
 489                 const float x = ((e.scale * sample + e.start) /
 490                         samples_per_pixel - pixels_offset) + left;
 491                 const AnalogSegment::EnvelopeSample *const s =
 492                         e.samples + sample;
 493
 494                 // We overlap this sample with the next so that vertical
 495                 // gaps do not appear during steep rising or falling edges
 496                 const float b = y - max(s->max, (s + 1)->min) * scale_;
 497                 const float t = y - min(s->min, (s + 1)->max) * scale_;
 498
 499                 float h = b - t;
 500                 if (h >= 0.0f && h <= 1.0f)
 501                         h = 1.0f;
 502                 if (h <= 0.0f && h >= -1.0f)
 503                         h = -1.0f;
 504
 505                 *rect++ = QRectF(x, t, 1.0f, h);
 506         }
 507
 508         p.drawRects(rects, e.length);
 509
 510         delete[] rects;
 511         delete[] e.samples;
 512 }
 513
 514 void AnalogSignal::paint_logic_mid(QPainter &p, ViewItemPaintParams &pp)
 515 {
 516         QLineF *line;
 517
 518         vector< pair<int64_t, bool> > edges;
 519
 520         assert(base_);
 521
 522         const int y = get_visual_y();
 523
 524         if (!base_->enabled() || !base_->logic_data())
 525                 return;
 526
 527         const int signal_margin =
 528                 QFontMetrics(QApplication::font()).height() / 2;
 529
 530         const int ph = min(pos_vdivs_, 1) * div_height_;
 531         const int nh = min(neg_vdivs_, 1) * div_height_;
 532         const float high_offset = y - ph + signal_margin + 0.5f;
 533         const float low_offset = y + nh - signal_margin - 0.5f;
 534
 535         const deque< shared_ptr<pv::data::LogicSegment> > &segments =
 536                 base_->logic_data()->logic_segments();
 537
 538         if (segments.empty())
 539                 return;
 540
 541         const shared_ptr<pv::data::LogicSegment> &segment =
 542                 segments.front();
 543
 544         double samplerate = segment->samplerate();
 545
 546         // Show sample rate as 1Hz when it is unknown
 547         if (samplerate == 0.0)
 548                 samplerate = 1.0;
 549
 550         const double pixels_offset = pp.pixels_offset();
 551         const pv::util::Timestamp& start_time = segment->start_time();
 552         const int64_t last_sample = segment->get_sample_count() - 1;
 553         const double samples_per_pixel = samplerate * pp.scale();
 554         const double pixels_per_sample = 1 / samples_per_pixel;
 555         const pv::util::Timestamp start = samplerate * (pp.offset() - start_time);
 556         const pv::util::Timestamp end = start + samples_per_pixel * pp.width();
 557
 558         const int64_t start_sample = min(max(floor(start).convert_to<int64_t>(),
 559                 (int64_t)0), last_sample);
 560         const uint64_t end_sample = min(max(ceil(end).convert_to<int64_t>(),
 561                 (int64_t)0), last_sample);
 562
 563         segment->get_subsampled_edges(edges, start_sample, end_sample,
 564                 samples_per_pixel / LogicSignal::Oversampling, 0);
 565         assert(edges.size() >= 2);
 566
 567         // Check whether we need to paint the sampling points
 568         GlobalSettings settings;
 569         const bool show_sampling_points =
 570                 settings.value(GlobalSettings::Key_View_ShowSamplingPoints).toBool() &&
 571                 (samples_per_pixel < 0.25);
 572
 573         vector<QRectF> sampling_points;
 574         float sampling_point_x = 0.0f;
 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                 sampling_point_x = (edges.cbegin()->first / samples_per_pixel - pixels_offset) + pp.left();
 581         }
 582
 583         // Paint the edges
 584         const unsigned int edge_count = edges.size() - 2;
 585         QLineF *const edge_lines = new QLineF[edge_count];
 586         line = edge_lines;
 587
 588         for (auto i = edges.cbegin() + 1; i != edges.cend() - 1; i++) {
 589                 const float x = ((*i).first / samples_per_pixel -
 590                         pixels_offset) + pp.left();
 591                 *line++ = QLineF(x, high_offset, x, low_offset);
 592
 593                 if (show_sampling_points)
 594                         while (sampling_point_sample < (*i).first) {
 595                                 const float y = (*i).second ? low_offset : high_offset;
 596                                 sampling_points.emplace_back(
 597                                         QRectF(sampling_point_x - (w / 2), y - (w / 2), w, w));
 598                                 sampling_point_sample++;
 599                                 sampling_point_x += pixels_per_sample;
 600                         };
 601         }
 602
 603         // Calculate the sample points from the last edge to the end of the trace
 604         if (show_sampling_points)
 605                 while ((uint64_t)sampling_point_sample <= end_sample) {
 606                         // Signal changed after the last edge, so the level is inverted
 607                         const float y = (edges.cend() - 1)->second ? high_offset : low_offset;
 608                         sampling_points.emplace_back(
 609                                 QRectF(sampling_point_x - (w / 2), y - (w / 2), w, w));
 610                         sampling_point_sample++;
 611                         sampling_point_x += pixels_per_sample;
 612                 };
 613
 614         p.setPen(LogicSignal::EdgeColour);
 615         p.drawLines(edge_lines, edge_count);
 616         delete[] edge_lines;
 617
 618         // Paint the caps
 619         const unsigned int max_cap_line_count = edges.size();
 620         QLineF *const cap_lines = new QLineF[max_cap_line_count];
 621
 622         p.setPen(LogicSignal::HighColour);
 623         paint_logic_caps(p, cap_lines, edges, true, samples_per_pixel,
 624                 pixels_offset, pp.left(), high_offset);
 625         p.setPen(LogicSignal::LowColour);
 626         paint_logic_caps(p, cap_lines, edges, false, samples_per_pixel,
 627                 pixels_offset, pp.left(), low_offset);
 628
 629         delete[] cap_lines;
 630
 631         // Paint the sampling points
 632         if (show_sampling_points) {
 633                 p.setPen(SamplingPointColour);
 634                 p.drawRects(sampling_points.data(), sampling_points.size());
 635         }
 636 }
 637
 638 void AnalogSignal::paint_logic_caps(QPainter &p, QLineF *const lines,
 639         vector< pair<int64_t, bool> > &edges, bool level,
 640         double samples_per_pixel, double pixels_offset, float x_offset,
 641         float y_offset)
 642 {
 643         QLineF *line = lines;
 644
 645         for (auto i = edges.begin(); i != (edges.end() - 1); i++)
 646                 if ((*i).second == level) {
 647                         *line++ = QLineF(
 648                                 ((*i).first / samples_per_pixel -
 649                                         pixels_offset) + x_offset, y_offset,
 650                                 ((*(i+1)).first / samples_per_pixel -
 651                                         pixels_offset) + x_offset, y_offset);
 652                 }
 653
 654         p.drawLines(lines, line - lines);
 655 }
 656
 657 float AnalogSignal::get_resolution(int scale_index)
 658 {
 659         const float seq[] = {1.0f, 2.0f, 5.0f};
 660
 661         const int offset = numeric_limits<int>::max() / (2 * countof(seq));
 662         const div_t d = div((int)(scale_index + countof(seq) * offset),
 663                 countof(seq));
 664
 665         return powf(10.0f, d.quot - offset) * seq[d.rem];
 666 }
 667
 668 void AnalogSignal::update_scale()
 669 {
 670         resolution_ = get_resolution(scale_index_);
 671         scale_ = div_height_ / resolution_;
 672 }
 673
 674 void AnalogSignal::update_conversion_widgets()
 675 {
 676         SignalBase::ConversionType conv_type = base_->get_conversion_type();
 677
 678         // Enable or disable widgets depending on conversion state
 679         conv_threshold_cb_->setEnabled(conv_type != SignalBase::NoConversion);
 680         display_type_cb_->setEnabled(conv_type != SignalBase::NoConversion);
 681
 682         conv_threshold_cb_->clear();
 683
 684         vector < pair<QString, int> > presets = base_->get_conversion_presets();
 685
 686         // Prevent the combo box from firing the "edit text changed" signal
 687         // as that would involuntarily select the first entry
 688         conv_threshold_cb_->blockSignals(true);
 689
 690         // Set available options depending on chosen conversion
 691         for (pair<QString, int> preset : presets)
 692                 conv_threshold_cb_->addItem(preset.first, preset.second);
 693
 694         map < QString, QVariant > options = base_->get_conversion_options();
 695
 696         if (conv_type == SignalBase::A2LConversionByThreshold) {
 697                 const vector<double> thresholds = base_->get_conversion_thresholds(
 698                                 SignalBase::A2LConversionByThreshold, true);
 699                 conv_threshold_cb_->addItem(
 700                                 QString("%1V").arg(QString::number(thresholds[0], 'f', 1)), -1);
 701         }
 702
 703         if (conv_type == SignalBase::A2LConversionBySchmittTrigger) {
 704                 const vector<double> thresholds = base_->get_conversion_thresholds(
 705                                 SignalBase::A2LConversionBySchmittTrigger, true);
 706                 conv_threshold_cb_->addItem(QString("%1V/%2V").arg(
 707                                 QString::number(thresholds[0], 'f', 1),
 708                                 QString::number(thresholds[1], 'f', 1)), -1);
 709         }
 710
 711         int preset_id = base_->get_current_conversion_preset();
 712         conv_threshold_cb_->setCurrentIndex(
 713                         conv_threshold_cb_->findData(preset_id));
 714
 715         conv_threshold_cb_->blockSignals(false);
 716 }
 717
 718 void AnalogSignal::perform_autoranging(bool keep_divs, bool force_update)
 719 {
 720         const deque< shared_ptr<pv::data::AnalogSegment> > &segments =
 721                 base_->analog_data()->analog_segments();
 722
 723         if (segments.empty())
 724                 return;
 725
 726         static double prev_min = 0, prev_max = 0;
 727         double min = 0, max = 0;
 728
 729         for (shared_ptr<pv::data::AnalogSegment> segment : segments) {
 730                 pair<double, double> mm = segment->get_min_max();
 731                 min = std::min(min, mm.first);
 732                 max = std::max(max, mm.second);
 733         }
 734
 735         if ((min == prev_min) && (max == prev_max) && !force_update)
 736                 return;
 737
 738         prev_min = min;
 739         prev_max = max;
 740
 741         // If we're allowed to alter the div assignment...
 742         if (!keep_divs) {
 743                 // Use all divs for the positive range if there are no negative values
 744                 if ((min == 0) && (neg_vdivs_ > 0)) {
 745                         pos_vdivs_ += neg_vdivs_;
 746                         neg_vdivs_ = 0;
 747                 }
 748
 749                 // Split up the divs if there are negative values but no negative divs
 750                 if ((min < 0) && (neg_vdivs_ == 0)) {
 751                         neg_vdivs_ = pos_vdivs_ / 2;
 752                         pos_vdivs_ -= neg_vdivs_;
 753                 }
 754         }
 755
 756         // If there is still no positive div when we need it, add one
 757         // (this can happen when pos_vdivs==neg_vdivs==0)
 758         if ((max > 0) && (pos_vdivs_ == 0)) {
 759                 pos_vdivs_ = 1;
 760                 owner_->extents_changed(false, true);
 761         }
 762
 763         // If there is still no negative div when we need it, add one
 764         // (this can happen when pos_vdivs was 0 or 1 when trying to split)
 765         if ((min < 0) && (neg_vdivs_ == 0)) {
 766                 neg_vdivs_ = 1;
 767                 owner_->extents_changed(false, true);
 768         }
 769
 770         double min_value_per_div;
 771         if ((pos_vdivs_ > 0) && (neg_vdivs_ >  0))
 772                 min_value_per_div = std::max(max / pos_vdivs_, -min / neg_vdivs_);
 773         else if (pos_vdivs_ > 0)
 774                 min_value_per_div = max / pos_vdivs_;
 775         else
 776                 min_value_per_div = -min / neg_vdivs_;
 777
 778         // Find first scale value that is bigger than the value we need
 779         for (int i = MinScaleIndex; i < MaxScaleIndex; i++)
 780                 if (get_resolution(i) > min_value_per_div) {
 781                         scale_index_ = i;
 782                         break;
 783                 }
 784
 785         update_scale();
 786 }
 787
 788 void AnalogSignal::populate_popup_form(QWidget *parent, QFormLayout *form)
 789 {
 790         // Add the standard options
 791         Signal::populate_popup_form(parent, form);
 792
 793         QFormLayout *const layout = new QFormLayout;
 794
 795         // Add div-related settings
 796         pvdiv_sb_ = new QSpinBox(parent);
 797         pvdiv_sb_->setRange(0, MaximumVDivs);
 798         pvdiv_sb_->setValue(pos_vdivs_);
 799         connect(pvdiv_sb_, SIGNAL(valueChanged(int)),
 800                 this, SLOT(on_pos_vdivs_changed(int)));
 801         layout->addRow(tr("Number of pos vertical divs"), pvdiv_sb_);
 802
 803         nvdiv_sb_ = new QSpinBox(parent);
 804         nvdiv_sb_->setRange(0, MaximumVDivs);
 805         nvdiv_sb_->setValue(neg_vdivs_);
 806         connect(nvdiv_sb_, SIGNAL(valueChanged(int)),
 807                 this, SLOT(on_neg_vdivs_changed(int)));
 808         layout->addRow(tr("Number of neg vertical divs"), nvdiv_sb_);
 809
 810         div_height_sb_ = new QSpinBox(parent);
 811         div_height_sb_->setRange(20, 1000);
 812         div_height_sb_->setSingleStep(5);
 813         div_height_sb_->setSuffix(tr(" pixels"));
 814         div_height_sb_->setValue(div_height_);
 815         connect(div_height_sb_, SIGNAL(valueChanged(int)),
 816                 this, SLOT(on_div_height_changed(int)));
 817         layout->addRow(tr("Div height"), div_height_sb_);
 818
 819         // Add the vertical resolution
 820         resolution_cb_ = new QComboBox(parent);
 821
 822         for (int i = MinScaleIndex; i < MaxScaleIndex; i++) {
 823                 const QString label = QString("%1").arg(get_resolution(i));
 824                 resolution_cb_->insertItem(0, label, QVariant(i));
 825         }
 826
 827         int cur_idx = resolution_cb_->findData(QVariant(scale_index_));
 828         resolution_cb_->setCurrentIndex(cur_idx);
 829
 830         connect(resolution_cb_, SIGNAL(currentIndexChanged(int)),
 831                 this, SLOT(on_resolution_changed(int)));
 832
 833         QGridLayout *const vdiv_layout = new QGridLayout;
 834         QLabel *const vdiv_unit = new QLabel(tr("V/div"));
 835         vdiv_layout->addWidget(resolution_cb_, 0, 0);
 836         vdiv_layout->addWidget(vdiv_unit, 0, 1);
 837
 838         layout->addRow(tr("Vertical resolution"), vdiv_layout);
 839
 840         // Add the autoranging checkbox
 841         QCheckBox* autoranging_cb = new QCheckBox();
 842         autoranging_cb->setCheckState(autoranging_ ? Qt::Checked : Qt::Unchecked);
 843
 844         connect(autoranging_cb, SIGNAL(stateChanged(int)),
 845                 this, SLOT(on_autoranging_changed(int)));
 846
 847         layout->addRow(tr("Autoranging"), autoranging_cb);
 848
 849         // Add the conversion type dropdown
 850         conversion_cb_ = new QComboBox();
 851
 852         conversion_cb_->addItem(tr("none"),
 853                 SignalBase::NoConversion);
 854         conversion_cb_->addItem(tr("to logic via threshold"),
 855                 SignalBase::A2LConversionByThreshold);
 856         conversion_cb_->addItem(tr("to logic via schmitt-trigger"),
 857                 SignalBase::A2LConversionBySchmittTrigger);
 858
 859         cur_idx = conversion_cb_->findData(QVariant(base_->get_conversion_type()));
 860         conversion_cb_->setCurrentIndex(cur_idx);
 861
 862         layout->addRow(tr("Conversion"), conversion_cb_);
 863
 864         connect(conversion_cb_, SIGNAL(currentIndexChanged(int)),
 865                 this, SLOT(on_conversion_changed(int)));
 866
 867     // Add the conversion threshold settings
 868     conv_threshold_cb_ = new QComboBox();
 869     conv_threshold_cb_->setEditable(true);
 870
 871     layout->addRow(tr("Conversion threshold(s)"), conv_threshold_cb_);
 872
 873     connect(conv_threshold_cb_, SIGNAL(currentIndexChanged(int)),
 874             this, SLOT(on_conv_threshold_changed(int)));
 875     connect(conv_threshold_cb_, SIGNAL(editTextChanged(const QString)),
 876             this, SLOT(on_conv_threshold_changed()));  // index will be -1
 877
 878         // Add the display type dropdown
 879         display_type_cb_ = new QComboBox();
 880
 881         display_type_cb_->addItem(tr("analog"), DisplayAnalog);
 882         display_type_cb_->addItem(tr("converted"), DisplayConverted);
 883         display_type_cb_->addItem(tr("analog+converted"), DisplayBoth);
 884
 885         cur_idx = display_type_cb_->findData(QVariant(display_type_));
 886         display_type_cb_->setCurrentIndex(cur_idx);
 887
 888         layout->addRow(tr("Show traces for"), display_type_cb_);
 889
 890         connect(display_type_cb_, SIGNAL(currentIndexChanged(int)),
 891                 this, SLOT(on_display_type_changed(int)));
 892
 893         // Update the conversion widget contents and states
 894         update_conversion_widgets();
 895
 896         form->addRow(layout);
 897 }
 898
 899 void AnalogSignal::on_min_max_changed(float min, float max)
 900 {
 901         (void)min;
 902         (void)max;
 903
 904         if (autoranging_)
 905                 perform_autoranging(false, false);
 906 }
 907
 908 void AnalogSignal::on_pos_vdivs_changed(int vdivs)
 909 {
 910         if (vdivs == pos_vdivs_)
 911                 return;
 912
 913         pos_vdivs_ = vdivs;
 914
 915         // There has to be at least one div, positive or negative
 916         if ((neg_vdivs_ == 0) && (pos_vdivs_ == 0)) {
 917                 pos_vdivs_ = 1;
 918                 if (pvdiv_sb_)
 919                         pvdiv_sb_->setValue(pos_vdivs_);
 920         }
 921
 922         if (autoranging_) {
 923                 perform_autoranging(true, true);
 924
 925                 // It could be that a positive or negative div was added, so update
 926                 if (pvdiv_sb_) {
 927                         pvdiv_sb_->setValue(pos_vdivs_);
 928                         nvdiv_sb_->setValue(neg_vdivs_);
 929                 }
 930         }
 931
 932         if (owner_) {
 933                 // Call order is important, otherwise the lazy event handler won't work
 934                 owner_->extents_changed(false, true);
 935                 owner_->row_item_appearance_changed(false, true);
 936         }
 937 }
 938
 939 void AnalogSignal::on_neg_vdivs_changed(int vdivs)
 940 {
 941         if (vdivs == neg_vdivs_)
 942                 return;
 943
 944         neg_vdivs_ = vdivs;
 945
 946         // There has to be at least one div, positive or negative
 947         if ((neg_vdivs_ == 0) && (pos_vdivs_ == 0)) {
 948                 pos_vdivs_ = 1;
 949                 if (pvdiv_sb_)
 950                         pvdiv_sb_->setValue(pos_vdivs_);
 951         }
 952
 953         if (autoranging_) {
 954                 perform_autoranging(true, true);
 955
 956                 // It could be that a positive or negative div was added, so update
 957                 if (pvdiv_sb_) {
 958                         pvdiv_sb_->setValue(pos_vdivs_);
 959                         nvdiv_sb_->setValue(neg_vdivs_);
 960                 }
 961         }
 962
 963         if (owner_) {
 964                 // Call order is important, otherwise the lazy event handler won't work
 965                 owner_->extents_changed(false, true);
 966                 owner_->row_item_appearance_changed(false, true);
 967         }
 968 }
 969
 970 void AnalogSignal::on_div_height_changed(int height)
 971 {
 972         div_height_ = height;
 973         update_scale();
 974
 975         if (owner_) {
 976                 // Call order is important, otherwise the lazy event handler won't work
 977                 owner_->extents_changed(false, true);
 978                 owner_->row_item_appearance_changed(false, true);
 979         }
 980 }
 981
 982 void AnalogSignal::on_resolution_changed(int index)
 983 {
 984         scale_index_ = resolution_cb_->itemData(index).toInt();
 985         update_scale();
 986
 987         if (owner_)
 988                 owner_->row_item_appearance_changed(false, true);
 989 }
 990
 991 void AnalogSignal::on_autoranging_changed(int state)
 992 {
 993         autoranging_ = (state == Qt::Checked);
 994
 995         if (autoranging_)
 996                 perform_autoranging(false, true);
 997
 998         if (owner_) {
 999                 // Call order is important, otherwise the lazy event handler won't work
1000                 owner_->extents_changed(false, true);
1001                 owner_->row_item_appearance_changed(false, true);
1002         }
1003 }
1004
1005 void AnalogSignal::on_conversion_changed(int index)
1006 {
1007         SignalBase::ConversionType old_conv_type = base_->get_conversion_type();
1008
1009         SignalBase::ConversionType conv_type =
1010                 (SignalBase::ConversionType)(conversion_cb_->itemData(index).toInt());
1011
1012         if (conv_type != old_conv_type) {
1013                 base_->set_conversion_type(conv_type);
1014                 update_conversion_widgets();
1015
1016                 if (owner_)
1017                         owner_->row_item_appearance_changed(false, true);
1018         }
1019 }
1020
1021 void AnalogSignal::on_conv_threshold_changed(int index)
1022 {
1023         SignalBase::ConversionType conv_type = base_->get_conversion_type();
1024
1025         // Note: index is set to -1 if the text in the combo box matches none of
1026         // the entries in the combo box
1027
1028         if ((index == -1) && (conv_threshold_cb_->currentText().length() == 0))
1029                 return;
1030
1031         // The combo box entry with the custom value has user_data set to -1
1032         const int user_data = conv_threshold_cb_->findText(
1033                         conv_threshold_cb_->currentText());
1034
1035         const bool use_custom_thr = (index == -1) || (user_data == -1);
1036
1037         if (conv_type == SignalBase::A2LConversionByThreshold && use_custom_thr) {
1038                 // Not one of the preset values, try to parse the combo box text
1039                 // Note: Regex loosely based on
1040                 // https://txt2re.com/index-c++.php3?s=0.1V&1&-13
1041                 QString re1 = "([+-]?\\d*[\\.,]?\\d*)"; // Float value
1042                 QString re2 = "([a-zA-Z]*)"; // SI unit
1043                 QRegExp regex(re1 + re2);
1044
1045                 const QString text = conv_threshold_cb_->currentText();
1046                 if (!regex.exactMatch(text))
1047                         return;  // String doesn't match the regex
1048
1049                 QStringList tokens = regex.capturedTexts();
1050
1051                 // For now, we simply assume that the unit is volt without modifiers
1052                 const double thr = tokens.at(1).toDouble();
1053
1054                 // Only restart the conversion if the threshold was updated.
1055                 // We're starting a delayed conversion because the user may still be
1056                 // typing and the UI would lag if we kept on restarting it immediately
1057                 if (base_->set_conversion_option("threshold_value", thr))
1058                         base_->start_conversion(true);
1059         }
1060
1061         if (conv_type == SignalBase::A2LConversionBySchmittTrigger && use_custom_thr) {
1062                 // Not one of the preset values, try to parse the combo box text
1063                 // Note: Regex loosely based on
1064                 // https://txt2re.com/index-c++.php3?s=0.1V/0.2V&2&14&-22&3&15
1065                 QString re1 = "([+-]?\\d*[\\.,]?\\d*)"; // Float value
1066                 QString re2 = "([a-zA-Z]*)"; // SI unit
1067                 QString re3 = "\\/"; // Forward slash, not captured
1068                 QString re4 = "([+-]?\\d*[\\.,]?\\d*)"; // Float value
1069                 QString re5 = "([a-zA-Z]*)"; // SI unit
1070                 QRegExp regex(re1 + re2 + re3 + re4 + re5);
1071
1072                 const QString text = conv_threshold_cb_->currentText();
1073                 if (!regex.exactMatch(text))
1074                         return;  // String doesn't match the regex
1075
1076                 QStringList tokens = regex.capturedTexts();
1077
1078                 // For now, we simply assume that the unit is volt without modifiers
1079                 const double low_thr = tokens.at(1).toDouble();
1080                 const double high_thr = tokens.at(3).toDouble();
1081
1082                 // Only restart the conversion if one of the options was updated.
1083                 // We're starting a delayed conversion because the user may still be
1084                 // typing and the UI would lag if we kept on restarting it immediately
1085                 bool o1 = base_->set_conversion_option("threshold_value_low", low_thr);
1086                 bool o2 = base_->set_conversion_option("threshold_value_high", high_thr);
1087                 if (o1 || o2)
1088                         base_->start_conversion(true);  // Start delayed conversion
1089         }
1090
1091         base_->set_conversion_preset((SignalBase::ConversionPreset)index);
1092
1093         // Immediately start the conversion if we're not using custom values
1094         // (i.e. we're using one of the presets)
1095         if (!use_custom_thr)
1096                 base_->start_conversion();
1097 }
1098
1099 void AnalogSignal::on_delayed_conversion_starter()
1100 {
1101         base_->start_conversion();
1102 }
1103
1104 void AnalogSignal::on_display_type_changed(int index)
1105 {
1106         display_type_ = (DisplayType)(display_type_cb_->itemData(index).toInt());
1107
1108         if (owner_)
1109                 owner_->row_item_appearance_changed(false, true);
1110 }
1111
1112 void AnalogSignal::on_settingViewConversionThresholdDispMode_changed(const QVariant new_value)
1113 {
1114         conversion_threshold_disp_mode_ = new_value.toInt();
1115
1116         if (owner_)
1117                 owner_->row_item_appearance_changed(false, true);
1118 }
1119
1120 } // namespace trace
1121 } // namespace views
1122 } // namespace pv