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