pv/views/trace/analogsignal.cpp

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