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::deque;
  50 using std::div;
  51 using std::div_t;
  52 using std::max;
  53 using std::make_pair;
  54 using std::min;
  55 using std::numeric_limits;
  56 using std::pair;
  57 using std::shared_ptr;
  58 using std::vector;
  59
  60 using pv::data::SignalBase;
  61
  62 namespace pv {
  63 namespace views {
  64 namespace trace {
  65
  66 const QColor AnalogSignal::SignalColours[4] = {
  67         QColor(0xC4, 0xA0, 0x00),       // Yellow
  68         QColor(0x87, 0x20, 0x7A),       // Magenta
  69         QColor(0x20, 0x4A, 0x87),       // Blue
  70         QColor(0x4E, 0x9A, 0x06)        // Green
  71 };
  72
  73 const QPen AnalogSignal::AxisPen(QColor(0, 0, 0, 30 * 256 / 100), 2);
  74 const QColor AnalogSignal::GridMajorColor = QColor(0, 0, 0, 40 * 256 / 100);
  75 const QColor AnalogSignal::GridMinorColor = QColor(0, 0, 0, 20 * 256 / 100);
  76
  77 const QColor AnalogSignal::SamplingPointColour(0x77, 0x77, 0x77);
  78
  79 const QColor AnalogSignal::ThresholdColor = QColor(0, 0, 0, 30 * 256 / 100);
  80
  81 const int64_t AnalogSignal::TracePaintBlockSize = 1024 * 1024;  // 4 MiB (due to float)
  82 const float AnalogSignal::EnvelopeThreshold = 64.0f;
  83
  84 const int AnalogSignal::MaximumVDivs = 10;
  85 const int AnalogSignal::MinScaleIndex = -6;
  86 const int AnalogSignal::MaxScaleIndex = 7;
  87
  88 const int AnalogSignal::InfoTextMarginRight = 20;
  89 const int AnalogSignal::InfoTextMarginBottom = 5;
  90
  91 AnalogSignal::AnalogSignal(
  92         pv::Session &session,
  93         shared_ptr<data::SignalBase> base) :
  94         Signal(session, base),
  95         scale_index_(4), // 20 per div
  96         scale_index_drag_offset_(0),
  97         pos_vdivs_(1),
  98         neg_vdivs_(1),
  99         resolution_(0),
 100         display_type_(DisplayBoth),
 101         autoranging_(true)
 102 {
 103         axis_pen_ = AxisPen;
 104
 105         pv::data::Analog* analog_data =
 106                 dynamic_cast<pv::data::Analog*>(data().get());
 107
 108         connect(analog_data, SIGNAL(samples_added(QObject*, uint64_t, uint64_t)),
 109                 this, SLOT(on_samples_added()));
 110
 111         GlobalSettings gs;
 112         div_height_ = gs.value(GlobalSettings::Key_View_DefaultDivHeight).toInt();
 113
 114         base_->set_colour(SignalColours[base_->index() % countof(SignalColours)]);
 115         update_scale();
 116 }
 117
 118 shared_ptr<pv::data::SignalData> AnalogSignal::data() const
 119 {
 120         return base_->analog_data();
 121 }
 122
 123 void AnalogSignal::save_settings(QSettings &settings) const
 124 {
 125         settings.setValue("pos_vdivs", pos_vdivs_);
 126         settings.setValue("neg_vdivs", neg_vdivs_);
 127         settings.setValue("scale_index", scale_index_);
 128         settings.setValue("display_type", display_type_);
 129         settings.setValue("autoranging", autoranging_);
 130         settings.setValue("div_height", div_height_);
 131 }
 132
 133 void AnalogSignal::restore_settings(QSettings &settings)
 134 {
 135         if (settings.contains("pos_vdivs"))
 136                 pos_vdivs_ = settings.value("pos_vdivs").toInt();
 137
 138         if (settings.contains("neg_vdivs"))
 139                 neg_vdivs_ = settings.value("neg_vdivs").toInt();
 140
 141         if (settings.contains("scale_index")) {
 142                 scale_index_ = settings.value("scale_index").toInt();
 143                 update_scale();
 144         }
 145
 146         if (settings.contains("display_type"))
 147                 display_type_ = (DisplayType)(settings.value("display_type").toInt());
 148
 149         if (settings.contains("autoranging"))
 150                 autoranging_ = settings.value("autoranging").toBool();
 151
 152         if (settings.contains("div_height")) {
 153                 const int old_height = div_height_;
 154                 div_height_ = settings.value("div_height").toInt();
 155
 156                 if ((div_height_ != old_height) && owner_) {
 157                         // Call order is important, otherwise the lazy event handler won't work
 158                         owner_->extents_changed(false, true);
 159                         owner_->row_item_appearance_changed(false, true);
 160                 }
 161         }
 162 }
 163
 164 pair<int, int> AnalogSignal::v_extents() const
 165 {
 166         const int ph = pos_vdivs_ * div_height_;
 167         const int nh = neg_vdivs_ * div_height_;
 168         return make_pair(-ph, nh);
 169 }
 170
 171 int AnalogSignal::scale_handle_offset() const
 172 {
 173         const int h = (pos_vdivs_ + neg_vdivs_) * div_height_;
 174
 175         return ((scale_index_drag_offset_ - scale_index_) * h / 4) - h / 2;
 176 }
 177
 178 void AnalogSignal::scale_handle_dragged(int offset)
 179 {
 180         const int h = (pos_vdivs_ + neg_vdivs_) * div_height_;
 181
 182         scale_index_ = scale_index_drag_offset_ - (offset + h / 2) / (h / 4);
 183
 184         update_scale();
 185 }
 186
 187 void AnalogSignal::scale_handle_drag_release()
 188 {
 189         scale_index_drag_offset_ = scale_index_;
 190         update_scale();
 191 }
 192
 193 void AnalogSignal::paint_back(QPainter &p, ViewItemPaintParams &pp)
 194 {
 195         if (base_->enabled()) {
 196                 Trace::paint_back(p, pp);
 197                 paint_axis(p, pp, get_visual_y());
 198         }
 199 }
 200
 201 void AnalogSignal::paint_mid(QPainter &p, ViewItemPaintParams &pp)
 202 {
 203         assert(base_->analog_data());
 204         assert(owner_);
 205
 206         const int y = get_visual_y();
 207
 208         if (!base_->enabled())
 209                 return;
 210
 211         if ((display_type_ == DisplayAnalog) || (display_type_ == DisplayBoth)) {
 212                 paint_grid(p, y, pp.left(), pp.right());
 213
 214                 const deque< shared_ptr<pv::data::AnalogSegment> > &segments =
 215                         base_->analog_data()->analog_segments();
 216                 if (segments.empty())
 217                         return;
 218
 219                 const shared_ptr<pv::data::AnalogSegment> &segment =
 220                         segments.front();
 221
 222                 const double pixels_offset = pp.pixels_offset();
 223                 const double samplerate = max(1.0, segment->samplerate());
 224                 const pv::util::Timestamp& start_time = segment->start_time();
 225                 const int64_t last_sample = segment->get_sample_count() - 1;
 226                 const double samples_per_pixel = samplerate * pp.scale();
 227                 const pv::util::Timestamp start = samplerate * (pp.offset() - start_time);
 228                 const pv::util::Timestamp end = start + samples_per_pixel * pp.width();
 229
 230                 const int64_t start_sample = min(max(floor(start).convert_to<int64_t>(),
 231                         (int64_t)0), last_sample);
 232                 const int64_t end_sample = min(max((ceil(end) + 1).convert_to<int64_t>(),
 233                         (int64_t)0), last_sample);
 234
 235                 if (samples_per_pixel < EnvelopeThreshold)
 236                         paint_trace(p, segment, y, pp.left(),
 237                                 start_sample, end_sample,
 238                                 pixels_offset, samples_per_pixel);
 239                 else
 240                         paint_envelope(p, segment, y, pp.left(),
 241                                 start_sample, end_sample,
 242                                 pixels_offset, samples_per_pixel);
 243         }
 244
 245         const SignalBase::ConversionType conv_type = base_->get_conversion_type();
 246
 247         if (((conv_type == SignalBase::A2LConversionByThreshold) ||
 248                 (conv_type == SignalBase::A2LConversionBySchmittTrigger))) {
 249
 250                 if ((display_type_ == DisplayAnalog) || (display_type_ == DisplayBoth))
 251                         paint_conversion_thresholds(p, pp);
 252
 253                 if ((display_type_ == DisplayConverted) || (display_type_ == DisplayBoth))
 254                         paint_logic_mid(p, pp);
 255         }
 256 }
 257
 258 void AnalogSignal::paint_fore(QPainter &p, ViewItemPaintParams &pp)
 259 {
 260         if (!enabled())
 261                 return;
 262
 263         if ((display_type_ == DisplayAnalog) || (display_type_ == DisplayBoth)) {
 264                 const int y = get_visual_y();
 265
 266                 // Show the info section on the right side of the trace
 267                 const QString infotext = QString("%1 V/div").arg(resolution_);
 268
 269                 p.setPen(base_->colour());
 270                 p.setFont(QApplication::font());
 271
 272                 const QRectF bounding_rect = QRectF(pp.left(),
 273                                 y + v_extents().first,
 274                                 pp.width() - InfoTextMarginRight,
 275                                 v_extents().second - v_extents().first - InfoTextMarginBottom);
 276
 277                 p.drawText(bounding_rect, Qt::AlignRight | Qt::AlignBottom, infotext);
 278         }
 279 }
 280
 281 void AnalogSignal::paint_grid(QPainter &p, int y, int left, int right)
 282 {
 283         p.setRenderHint(QPainter::Antialiasing, false);
 284
 285         GlobalSettings settings;
 286         const bool show_analog_minor_grid =
 287                 settings.value(GlobalSettings::Key_View_ShowAnalogMinorGrid).toBool();
 288
 289         if (pos_vdivs_ > 0) {
 290                 p.setPen(QPen(GridMajorColor, 1, Qt::DashLine));
 291                 for (int i = 1; i <= pos_vdivs_; i++) {
 292                         const float dy = i * div_height_;
 293                         p.drawLine(QLineF(left, y - dy, right, y - dy));
 294                 }
 295         }
 296
 297         if ((pos_vdivs_ > 0) && show_analog_minor_grid) {
 298                 p.setPen(QPen(GridMinorColor, 1, Qt::DashLine));
 299                 for (int i = 0; i < pos_vdivs_; i++) {
 300                         const float dy = i * div_height_;
 301                         const float dy25 = dy + (0.25 * div_height_);
 302                         const float dy50 = dy + (0.50 * div_height_);
 303                         const float dy75 = dy + (0.75 * div_height_);
 304                         p.drawLine(QLineF(left, y - dy25, right, y - dy25));
 305                         p.drawLine(QLineF(left, y - dy50, right, y - dy50));
 306                         p.drawLine(QLineF(left, y - dy75, right, y - dy75));
 307                 }
 308         }
 309
 310         if (neg_vdivs_ > 0) {
 311                 p.setPen(QPen(GridMajorColor, 1, Qt::DashLine));
 312                 for (int i = 1; i <= neg_vdivs_; i++) {
 313                         const float dy = i * div_height_;
 314                         p.drawLine(QLineF(left, y + dy, right, y + dy));
 315                 }
 316         }
 317
 318         if ((pos_vdivs_ > 0) && show_analog_minor_grid) {
 319                 p.setPen(QPen(GridMinorColor, 1, Qt::DashLine));
 320                 for (int i = 0; i < neg_vdivs_; i++) {
 321                         const float dy = i * div_height_;
 322                         const float dy25 = dy + (0.25 * div_height_);
 323                         const float dy50 = dy + (0.50 * div_height_);
 324                         const float dy75 = dy + (0.75 * div_height_);
 325                         p.drawLine(QLineF(left, y + dy25, right, y + dy25));
 326                         p.drawLine(QLineF(left, y + dy50, right, y + dy50));
 327                         p.drawLine(QLineF(left, y + dy75, right, y + dy75));
 328                 }
 329         }
 330
 331         p.setRenderHint(QPainter::Antialiasing, true);
 332 }
 333
 334 void AnalogSignal::paint_trace(QPainter &p,
 335         const shared_ptr<pv::data::AnalogSegment> &segment,
 336         int y, int left, const int64_t start, const int64_t end,
 337         const double pixels_offset, const double samples_per_pixel)
 338 {
 339         if (end <= start)
 340                 return;
 341
 342         // Calculate and paint the sampling points if enabled and useful
 343         GlobalSettings settings;
 344         const bool show_sampling_points =
 345                 settings.value(GlobalSettings::Key_View_ShowSamplingPoints).toBool() &&
 346                 (samples_per_pixel < 0.25);
 347
 348         p.setPen(base_->colour());
 349
 350         const int64_t points_count = end - start;
 351
 352         QPointF *points = new QPointF[points_count];
 353         QPointF *point = points;
 354
 355         QRectF *sampling_points = nullptr;
 356         if (show_sampling_points)
 357                  sampling_points = new QRectF[points_count];
 358         QRectF *sampling_point = sampling_points;
 359
 360         int64_t sample_count = min(points_count, TracePaintBlockSize);
 361         int64_t block_sample = 0;
 362         float *sample_block = new float[TracePaintBlockSize];
 363         segment->get_samples(start, start + sample_count, sample_block);
 364
 365         const int w = 2;
 366         for (int64_t sample = start; sample != end; sample++, block_sample++) {
 367
 368                 if (block_sample == TracePaintBlockSize) {
 369                         block_sample = 0;
 370                         sample_count = min(points_count - sample, TracePaintBlockSize);
 371                         segment->get_samples(sample, sample + sample_count, sample_block);
 372                 }
 373
 374                 const float x = (sample / samples_per_pixel -
 375                         pixels_offset) + left;
 376
 377                 *point++ = QPointF(x, y - sample_block[block_sample] * scale_);
 378
 379                 if (show_sampling_points)
 380                         *sampling_point++ =
 381                                 QRectF(x - (w / 2), y - sample_block[block_sample] * scale_ - (w / 2), w, w);
 382         }
 383         delete[] sample_block;
 384
 385         p.drawPolyline(points, points_count);
 386
 387         if (show_sampling_points) {
 388                 p.setPen(SamplingPointColour);
 389                 p.drawRects(sampling_points, points_count);
 390                 delete[] sampling_points;
 391         }
 392
 393         delete[] points;
 394 }
 395
 396 void AnalogSignal::paint_envelope(QPainter &p,
 397         const shared_ptr<pv::data::AnalogSegment> &segment,
 398         int y, int left, const int64_t start, const int64_t end,
 399         const double pixels_offset, const double samples_per_pixel)
 400 {
 401         using pv::data::AnalogSegment;
 402
 403         AnalogSegment::EnvelopeSection e;
 404         segment->get_envelope_section(e, start, end, samples_per_pixel);
 405
 406         if (e.length < 2)
 407                 return;
 408
 409         p.setPen(QPen(Qt::NoPen));
 410         p.setBrush(base_->colour());
 411
 412         QRectF *const rects = new QRectF[e.length];
 413         QRectF *rect = rects;
 414
 415         for (uint64_t sample = 0; sample < e.length - 1; sample++) {
 416                 const float x = ((e.scale * sample + e.start) /
 417                         samples_per_pixel - pixels_offset) + left;
 418                 const AnalogSegment::EnvelopeSample *const s =
 419                         e.samples + sample;
 420
 421                 // We overlap this sample with the next so that vertical
 422                 // gaps do not appear during steep rising or falling edges
 423                 const float b = y - max(s->max, (s + 1)->min) * scale_;
 424                 const float t = y - min(s->min, (s + 1)->max) * scale_;
 425
 426                 float h = b - t;
 427                 if (h >= 0.0f && h <= 1.0f)
 428                         h = 1.0f;
 429                 if (h <= 0.0f && h >= -1.0f)
 430                         h = -1.0f;
 431
 432                 *rect++ = QRectF(x, t, 1.0f, h);
 433         }
 434
 435         p.drawRects(rects, e.length);
 436
 437         delete[] rects;
 438         delete[] e.samples;
 439 }
 440
 441 void AnalogSignal::paint_conversion_thresholds(QPainter &p,
 442         ViewItemPaintParams &pp)
 443 {
 444         if (!base_->enabled() || !base_->logic_data())
 445                 return;
 446
 447         // TODO Register a change handler instead of querying this with every repaint
 448         GlobalSettings settings;
 449         const bool show_conversion_thresholds =
 450                 settings.value(GlobalSettings::Key_View_ShowConversionThresholds).toBool();
 451
 452         if (!show_conversion_thresholds)
 453                 return;
 454
 455         const vector<double> thresholds = base_->get_conversion_thresholds();
 456         const int y = get_visual_y();
 457
 458         p.setRenderHint(QPainter::Antialiasing, false);
 459
 460         p.setPen(ThresholdColor);
 461
 462         if (thresholds.size() == 2) {
 463                 // Draw as hatched block because two thresholds denote lower/upper level
 464                 const double thr_y0 = y - thresholds[0] * scale_;
 465                 const double thr_y1 = y - thresholds[1] * scale_;
 466                 p.fillRect(QRect(pp.left(), thr_y0, pp.right(), thr_y1 - thr_y0),
 467                         QBrush(ThresholdColor, Qt::BDiagPattern));
 468         } else {
 469                 // Draw as individual lines
 470                 for (const double thr : thresholds) {
 471                         const double thr_y = y - thr * scale_;
 472                         p.drawLine(QPointF(pp.left(), thr_y), QPointF(pp.right(), thr_y));
 473                 }
 474         }
 475
 476         p.setRenderHint(QPainter::Antialiasing, true);
 477 }
 478
 479 void AnalogSignal::paint_logic_mid(QPainter &p, ViewItemPaintParams &pp)
 480 {
 481         QLineF *line;
 482
 483         vector< pair<int64_t, bool> > edges;
 484
 485         assert(base_);
 486
 487         const int y = get_visual_y();
 488
 489         if (!base_->enabled() || !base_->logic_data())
 490                 return;
 491
 492         const int signal_margin =
 493                 QFontMetrics(QApplication::font()).height() / 2;
 494
 495         const int ph = min(pos_vdivs_, 1) * div_height_;
 496         const int nh = min(neg_vdivs_, 1) * div_height_;
 497         const float high_offset = y - ph + signal_margin + 0.5f;
 498         const float low_offset = y + nh - signal_margin - 0.5f;
 499
 500         const deque< shared_ptr<pv::data::LogicSegment> > &segments =
 501                 base_->logic_data()->logic_segments();
 502
 503         if (segments.empty())
 504                 return;
 505
 506         const shared_ptr<pv::data::LogicSegment> &segment =
 507                 segments.front();
 508
 509         double samplerate = segment->samplerate();
 510
 511         // Show sample rate as 1Hz when it is unknown
 512         if (samplerate == 0.0)
 513                 samplerate = 1.0;
 514
 515         const double pixels_offset = pp.pixels_offset();
 516         const pv::util::Timestamp& start_time = segment->start_time();
 517         const int64_t last_sample = segment->get_sample_count() - 1;
 518         const double samples_per_pixel = samplerate * pp.scale();
 519         const double pixels_per_sample = 1 / samples_per_pixel;
 520         const pv::util::Timestamp start = samplerate * (pp.offset() - start_time);
 521         const pv::util::Timestamp end = start + samples_per_pixel * pp.width();
 522
 523         const int64_t start_sample = min(max(floor(start).convert_to<int64_t>(),
 524                 (int64_t)0), last_sample);
 525         const uint64_t end_sample = min(max(ceil(end).convert_to<int64_t>(),
 526                 (int64_t)0), last_sample);
 527
 528         segment->get_subsampled_edges(edges, start_sample, end_sample,
 529                 samples_per_pixel / LogicSignal::Oversampling, 0);
 530         assert(edges.size() >= 2);
 531
 532         // Check whether we need to paint the sampling points
 533         GlobalSettings settings;
 534         const bool show_sampling_points =
 535                 settings.value(GlobalSettings::Key_View_ShowSamplingPoints).toBool() &&
 536                 (samples_per_pixel < 0.25);
 537
 538         vector<QRectF> sampling_points;
 539         float sampling_point_x = 0.0f;
 540         int64_t sampling_point_sample = start_sample;
 541         const int w = 2;
 542
 543         if (show_sampling_points) {
 544                 sampling_points.reserve(end_sample - start_sample + 1);
 545                 sampling_point_x = (edges.cbegin()->first / samples_per_pixel - pixels_offset) + pp.left();
 546         }
 547
 548         // Paint the edges
 549         const unsigned int edge_count = edges.size() - 2;
 550         QLineF *const edge_lines = new QLineF[edge_count];
 551         line = edge_lines;
 552
 553         for (auto i = edges.cbegin() + 1; i != edges.cend() - 1; i++) {
 554                 const float x = ((*i).first / samples_per_pixel -
 555                         pixels_offset) + pp.left();
 556                 *line++ = QLineF(x, high_offset, x, low_offset);
 557
 558                 if (show_sampling_points)
 559                         while (sampling_point_sample < (*i).first) {
 560                                 const float y = (*i).second ? low_offset : high_offset;
 561                                 sampling_points.emplace_back(
 562                                         QRectF(sampling_point_x - (w / 2), y - (w / 2), w, w));
 563                                 sampling_point_sample++;
 564                                 sampling_point_x += pixels_per_sample;
 565                         };
 566         }
 567
 568         // Calculate the sample points from the last edge to the end of the trace
 569         if (show_sampling_points)
 570                 while ((uint64_t)sampling_point_sample <= end_sample) {
 571                         // Signal changed after the last edge, so the level is inverted
 572                         const float y = (edges.cend() - 1)->second ? high_offset : low_offset;
 573                         sampling_points.emplace_back(
 574                                 QRectF(sampling_point_x - (w / 2), y - (w / 2), w, w));
 575                         sampling_point_sample++;
 576                         sampling_point_x += pixels_per_sample;
 577                 };
 578
 579         p.setPen(LogicSignal::EdgeColour);
 580         p.drawLines(edge_lines, edge_count);
 581         delete[] edge_lines;
 582
 583         // Paint the caps
 584         const unsigned int max_cap_line_count = edges.size();
 585         QLineF *const cap_lines = new QLineF[max_cap_line_count];
 586
 587         p.setPen(LogicSignal::HighColour);
 588         paint_logic_caps(p, cap_lines, edges, true, samples_per_pixel,
 589                 pixels_offset, pp.left(), high_offset);
 590         p.setPen(LogicSignal::LowColour);
 591         paint_logic_caps(p, cap_lines, edges, false, samples_per_pixel,
 592                 pixels_offset, pp.left(), low_offset);
 593
 594         delete[] cap_lines;
 595
 596         // Paint the sampling points
 597         if (show_sampling_points) {
 598                 p.setPen(SamplingPointColour);
 599                 p.drawRects(sampling_points.data(), sampling_points.size());
 600         }
 601 }
 602
 603 void AnalogSignal::paint_logic_caps(QPainter &p, QLineF *const lines,
 604         vector< pair<int64_t, bool> > &edges, bool level,
 605         double samples_per_pixel, double pixels_offset, float x_offset,
 606         float y_offset)
 607 {
 608         QLineF *line = lines;
 609
 610         for (auto i = edges.begin(); i != (edges.end() - 1); i++)
 611                 if ((*i).second == level) {
 612                         *line++ = QLineF(
 613                                 ((*i).first / samples_per_pixel -
 614                                         pixels_offset) + x_offset, y_offset,
 615                                 ((*(i+1)).first / samples_per_pixel -
 616                                         pixels_offset) + x_offset, y_offset);
 617                 }
 618
 619         p.drawLines(lines, line - lines);
 620 }
 621
 622 float AnalogSignal::get_resolution(int scale_index)
 623 {
 624         const float seq[] = {1.0f, 2.0f, 5.0f};
 625
 626         const int offset = numeric_limits<int>::max() / (2 * countof(seq));
 627         const div_t d = div((int)(scale_index + countof(seq) * offset),
 628                 countof(seq));
 629
 630         return powf(10.0f, d.quot - offset) * seq[d.rem];
 631 }
 632
 633 void AnalogSignal::update_scale()
 634 {
 635         resolution_ = get_resolution(scale_index_);
 636         scale_ = div_height_ / resolution_;
 637 }
 638
 639 void AnalogSignal::update_conversion_widgets()
 640 {
 641         SignalBase::ConversionType conv_type = base_->get_conversion_type();
 642
 643         // Enable or disable widgets depending on conversion state
 644         conv_threshold_cb_->setEnabled(conv_type != SignalBase::NoConversion);
 645         display_type_cb_->setEnabled(conv_type != SignalBase::NoConversion);
 646
 647         conv_threshold_cb_->clear();
 648
 649         vector < pair<QString, int> > presets = base_->get_conversion_presets();
 650
 651         // Prevent the combo box from firing the "edit text changed" signal
 652         // as that would involuntarily select the first entry
 653         conv_threshold_cb_->blockSignals(true);
 654
 655         // Set available options depending on chosen conversion
 656         for (pair<QString, int> preset : presets)
 657                 conv_threshold_cb_->addItem(preset.first, preset.second);
 658
 659         map < QString, QVariant > options = base_->get_conversion_options();
 660
 661         if (conv_type == SignalBase::A2LConversionByThreshold) {
 662                 const vector<double> thresholds = base_->get_conversion_thresholds(
 663                                 SignalBase::A2LConversionByThreshold, true);
 664                 conv_threshold_cb_->addItem(
 665                                 QString("%1V").arg(QString::number(thresholds[0], 'f', 1)), -1);
 666         }
 667
 668         if (conv_type == SignalBase::A2LConversionBySchmittTrigger) {
 669                 const vector<double> thresholds = base_->get_conversion_thresholds(
 670                                 SignalBase::A2LConversionBySchmittTrigger, true);
 671                 conv_threshold_cb_->addItem(QString("%1V/%2V").arg(
 672                                 QString::number(thresholds[0], 'f', 1),
 673                                 QString::number(thresholds[1], 'f', 1)), -1);
 674         }
 675
 676         int preset_id = base_->get_current_conversion_preset();
 677         conv_threshold_cb_->setCurrentIndex(
 678                         conv_threshold_cb_->findData(preset_id));
 679
 680         conv_threshold_cb_->blockSignals(false);
 681 }
 682
 683 void AnalogSignal::perform_autoranging(bool keep_divs, bool force_update)
 684 {
 685         const deque< shared_ptr<pv::data::AnalogSegment> > &segments =
 686                 base_->analog_data()->analog_segments();
 687
 688         if (segments.empty())
 689                 return;
 690
 691         static double prev_min = 0, prev_max = 0;
 692         double min = 0, max = 0;
 693
 694         for (shared_ptr<pv::data::AnalogSegment> segment : segments) {
 695                 pair<double, double> mm = segment->get_min_max();
 696                 min = std::min(min, mm.first);
 697                 max = std::max(max, mm.second);
 698         }
 699
 700         if ((min == prev_min) && (max == prev_max) && !force_update)
 701                 return;
 702
 703         prev_min = min;
 704         prev_max = max;
 705
 706         // If we're allowed to alter the div assignment...
 707         if (!keep_divs) {
 708                 // Use all divs for the positive range if there are no negative values
 709                 if ((min == 0) && (neg_vdivs_ > 0)) {
 710                         pos_vdivs_ += neg_vdivs_;
 711                         neg_vdivs_ = 0;
 712                 }
 713
 714                 // Split up the divs if there are negative values but no negative divs
 715                 if ((min < 0) && (neg_vdivs_ == 0)) {
 716                         neg_vdivs_ = pos_vdivs_ / 2;
 717                         pos_vdivs_ -= neg_vdivs_;
 718                 }
 719         }
 720
 721         // If there is still no positive div when we need it, add one
 722         // (this can happen when pos_vdivs==neg_vdivs==0)
 723         if ((max > 0) && (pos_vdivs_ == 0)) {
 724                 pos_vdivs_ = 1;
 725                 owner_->extents_changed(false, true);
 726         }
 727
 728         // If there is still no negative div when we need it, add one
 729         // (this can happen when pos_vdivs was 0 or 1 when trying to split)
 730         if ((min < 0) && (neg_vdivs_ == 0)) {
 731                 neg_vdivs_ = 1;
 732                 owner_->extents_changed(false, true);
 733         }
 734
 735         double min_value_per_div;
 736         if ((pos_vdivs_ > 0) && (neg_vdivs_ >  0))
 737                 min_value_per_div = std::max(max / pos_vdivs_, -min / neg_vdivs_);
 738         else if (pos_vdivs_ > 0)
 739                 min_value_per_div = max / pos_vdivs_;
 740         else
 741                 min_value_per_div = -min / neg_vdivs_;
 742
 743         // Find first scale value that is bigger than the value we need
 744         for (int i = MinScaleIndex; i < MaxScaleIndex; i++)
 745                 if (get_resolution(i) > min_value_per_div) {
 746                         scale_index_ = i;
 747                         break;
 748                 }
 749
 750         update_scale();
 751 }
 752
 753 void AnalogSignal::populate_popup_form(QWidget *parent, QFormLayout *form)
 754 {
 755         // Add the standard options
 756         Signal::populate_popup_form(parent, form);
 757
 758         QFormLayout *const layout = new QFormLayout;
 759
 760         // Add div-related settings
 761         pvdiv_sb_ = new QSpinBox(parent);
 762         pvdiv_sb_->setRange(0, MaximumVDivs);
 763         pvdiv_sb_->setValue(pos_vdivs_);
 764         connect(pvdiv_sb_, SIGNAL(valueChanged(int)),
 765                 this, SLOT(on_pos_vdivs_changed(int)));
 766         layout->addRow(tr("Number of pos vertical divs"), pvdiv_sb_);
 767
 768         nvdiv_sb_ = new QSpinBox(parent);
 769         nvdiv_sb_->setRange(0, MaximumVDivs);
 770         nvdiv_sb_->setValue(neg_vdivs_);
 771         connect(nvdiv_sb_, SIGNAL(valueChanged(int)),
 772                 this, SLOT(on_neg_vdivs_changed(int)));
 773         layout->addRow(tr("Number of neg vertical divs"), nvdiv_sb_);
 774
 775         div_height_sb_ = new QSpinBox(parent);
 776         div_height_sb_->setRange(20, 1000);
 777         div_height_sb_->setSingleStep(5);
 778         div_height_sb_->setSuffix(tr(" pixels"));
 779         div_height_sb_->setValue(div_height_);
 780         connect(div_height_sb_, SIGNAL(valueChanged(int)),
 781                 this, SLOT(on_div_height_changed(int)));
 782         layout->addRow(tr("Div height"), div_height_sb_);
 783
 784         // Add the vertical resolution
 785         resolution_cb_ = new QComboBox(parent);
 786
 787         for (int i = MinScaleIndex; i < MaxScaleIndex; i++) {
 788                 const QString label = QString("%1").arg(get_resolution(i));
 789                 resolution_cb_->insertItem(0, label, QVariant(i));
 790         }
 791
 792         int cur_idx = resolution_cb_->findData(QVariant(scale_index_));
 793         resolution_cb_->setCurrentIndex(cur_idx);
 794
 795         connect(resolution_cb_, SIGNAL(currentIndexChanged(int)),
 796                 this, SLOT(on_resolution_changed(int)));
 797
 798         QGridLayout *const vdiv_layout = new QGridLayout;
 799         QLabel *const vdiv_unit = new QLabel(tr("V/div"));
 800         vdiv_layout->addWidget(resolution_cb_, 0, 0);
 801         vdiv_layout->addWidget(vdiv_unit, 0, 1);
 802
 803         layout->addRow(tr("Vertical resolution"), vdiv_layout);
 804
 805         // Add the autoranging checkbox
 806         QCheckBox* autoranging_cb = new QCheckBox();
 807         autoranging_cb->setCheckState(autoranging_ ? Qt::Checked : Qt::Unchecked);
 808
 809         connect(autoranging_cb, SIGNAL(stateChanged(int)),
 810                 this, SLOT(on_autoranging_changed(int)));
 811
 812         layout->addRow(tr("Autoranging"), autoranging_cb);
 813
 814         // Add the conversion type dropdown
 815         conversion_cb_ = new QComboBox();
 816
 817         conversion_cb_->addItem(tr("none"),
 818                 SignalBase::NoConversion);
 819         conversion_cb_->addItem(tr("to logic via threshold"),
 820                 SignalBase::A2LConversionByThreshold);
 821         conversion_cb_->addItem(tr("to logic via schmitt-trigger"),
 822                 SignalBase::A2LConversionBySchmittTrigger);
 823
 824         cur_idx = conversion_cb_->findData(QVariant(base_->get_conversion_type()));
 825         conversion_cb_->setCurrentIndex(cur_idx);
 826
 827         layout->addRow(tr("Conversion"), conversion_cb_);
 828
 829         connect(conversion_cb_, SIGNAL(currentIndexChanged(int)),
 830                 this, SLOT(on_conversion_changed(int)));
 831
 832     // Add the conversion threshold settings
 833     conv_threshold_cb_ = new QComboBox();
 834     conv_threshold_cb_->setEditable(true);
 835
 836     layout->addRow(tr("Conversion threshold(s)"), conv_threshold_cb_);
 837
 838     connect(conv_threshold_cb_, SIGNAL(currentIndexChanged(int)),
 839             this, SLOT(on_conv_threshold_changed(int)));
 840     connect(conv_threshold_cb_, SIGNAL(editTextChanged(const QString)),
 841             this, SLOT(on_conv_threshold_changed()));  // index will be -1
 842
 843         // Add the display type dropdown
 844         display_type_cb_ = new QComboBox();
 845
 846         display_type_cb_->addItem(tr("analog"), DisplayAnalog);
 847         display_type_cb_->addItem(tr("converted"), DisplayConverted);
 848         display_type_cb_->addItem(tr("analog+converted"), DisplayBoth);
 849
 850         cur_idx = display_type_cb_->findData(QVariant(display_type_));
 851         display_type_cb_->setCurrentIndex(cur_idx);
 852
 853         layout->addRow(tr("Show traces for"), display_type_cb_);
 854
 855         connect(display_type_cb_, SIGNAL(currentIndexChanged(int)),
 856                 this, SLOT(on_display_type_changed(int)));
 857
 858         // Update the conversion widget contents and states
 859         update_conversion_widgets();
 860
 861         form->addRow(layout);
 862 }
 863
 864 void AnalogSignal::on_samples_added()
 865 {
 866         perform_autoranging(false, false);
 867 }
 868
 869 void AnalogSignal::on_pos_vdivs_changed(int vdivs)
 870 {
 871         if (vdivs == pos_vdivs_)
 872                 return;
 873
 874         pos_vdivs_ = vdivs;
 875
 876         // There has to be at least one div, positive or negative
 877         if ((neg_vdivs_ == 0) && (pos_vdivs_ == 0)) {
 878                 pos_vdivs_ = 1;
 879                 if (pvdiv_sb_)
 880                         pvdiv_sb_->setValue(pos_vdivs_);
 881         }
 882
 883         if (autoranging_) {
 884                 perform_autoranging(true, true);
 885
 886                 // It could be that a positive or negative div was added, so update
 887                 if (pvdiv_sb_) {
 888                         pvdiv_sb_->setValue(pos_vdivs_);
 889                         nvdiv_sb_->setValue(neg_vdivs_);
 890                 }
 891         }
 892
 893         if (owner_) {
 894                 // Call order is important, otherwise the lazy event handler won't work
 895                 owner_->extents_changed(false, true);
 896                 owner_->row_item_appearance_changed(false, true);
 897         }
 898 }
 899
 900 void AnalogSignal::on_neg_vdivs_changed(int vdivs)
 901 {
 902         if (vdivs == neg_vdivs_)
 903                 return;
 904
 905         neg_vdivs_ = vdivs;
 906
 907         // There has to be at least one div, positive or negative
 908         if ((neg_vdivs_ == 0) && (pos_vdivs_ == 0)) {
 909                 pos_vdivs_ = 1;
 910                 if (pvdiv_sb_)
 911                         pvdiv_sb_->setValue(pos_vdivs_);
 912         }
 913
 914         if (autoranging_) {
 915                 perform_autoranging(true, true);
 916
 917                 // It could be that a positive or negative div was added, so update
 918                 if (pvdiv_sb_) {
 919                         pvdiv_sb_->setValue(pos_vdivs_);
 920                         nvdiv_sb_->setValue(neg_vdivs_);
 921                 }
 922         }
 923
 924         if (owner_) {
 925                 // Call order is important, otherwise the lazy event handler won't work
 926                 owner_->extents_changed(false, true);
 927                 owner_->row_item_appearance_changed(false, true);
 928         }
 929 }
 930
 931 void AnalogSignal::on_div_height_changed(int height)
 932 {
 933         div_height_ = height;
 934         update_scale();
 935
 936         if (owner_) {
 937                 // Call order is important, otherwise the lazy event handler won't work
 938                 owner_->extents_changed(false, true);
 939                 owner_->row_item_appearance_changed(false, true);
 940         }
 941 }
 942
 943 void AnalogSignal::on_resolution_changed(int index)
 944 {
 945         scale_index_ = resolution_cb_->itemData(index).toInt();
 946         update_scale();
 947
 948         if (owner_)
 949                 owner_->row_item_appearance_changed(false, true);
 950 }
 951
 952 void AnalogSignal::on_autoranging_changed(int state)
 953 {
 954         autoranging_ = (state == Qt::Checked);
 955
 956         if (autoranging_)
 957                 perform_autoranging(false, true);
 958
 959         if (owner_) {
 960                 // Call order is important, otherwise the lazy event handler won't work
 961                 owner_->extents_changed(false, true);
 962                 owner_->row_item_appearance_changed(false, true);
 963         }
 964 }
 965
 966 void AnalogSignal::on_conversion_changed(int index)
 967 {
 968         SignalBase::ConversionType old_conv_type = base_->get_conversion_type();
 969
 970         SignalBase::ConversionType conv_type =
 971                 (SignalBase::ConversionType)(conversion_cb_->itemData(index).toInt());
 972
 973         if (conv_type != old_conv_type) {
 974                 base_->set_conversion_type(conv_type);
 975                 update_conversion_widgets();
 976
 977                 if (owner_)
 978                         owner_->row_item_appearance_changed(false, true);
 979         }
 980 }
 981
 982 void AnalogSignal::on_conv_threshold_changed(int index)
 983 {
 984         SignalBase::ConversionType conv_type = base_->get_conversion_type();
 985
 986         // Note: index is set to -1 if the text in the combo box matches none of
 987         // the entries in the combo box
 988
 989         if ((index == -1) && (conv_threshold_cb_->currentText().length() == 0))
 990                 return;
 991
 992         // The combo box entry with the custom value has user_data set to -1
 993         const int user_data = conv_threshold_cb_->findText(
 994                         conv_threshold_cb_->currentText());
 995
 996         const bool use_custom_thr = (index == -1) || (user_data == -1);
 997
 998         if (conv_type == SignalBase::A2LConversionByThreshold && use_custom_thr) {
 999                 // Not one of the preset values, try to parse the combo box text
1000                 // Note: Regex loosely based on
1001                 // https://txt2re.com/index-c++.php3?s=0.1V&1&-13
1002                 QString re1 = "([+-]?\\d*[\\.,]?\\d*)"; // Float value
1003                 QString re2 = "([a-zA-Z]*)"; // SI unit
1004                 QRegExp regex(re1 + re2);
1005
1006                 const QString text = conv_threshold_cb_->currentText();
1007                 if (!regex.exactMatch(text))
1008                         return;  // String doesn't match the regex
1009
1010                 QStringList tokens = regex.capturedTexts();
1011
1012                 // For now, we simply assume that the unit is volt without modifiers
1013                 const double thr = tokens.at(1).toDouble();
1014
1015                 // Only restart the conversion if the threshold was updated.
1016                 // We're starting a delayed conversion because the user may still be
1017                 // typing and the UI would lag if we kept on restarting it immediately
1018                 if (base_->set_conversion_option("threshold_value", thr))
1019                         base_->start_conversion(true);
1020         }
1021
1022         if (conv_type == SignalBase::A2LConversionBySchmittTrigger && use_custom_thr) {
1023                 // Not one of the preset values, try to parse the combo box text
1024                 // Note: Regex loosely based on
1025                 // https://txt2re.com/index-c++.php3?s=0.1V/0.2V&2&14&-22&3&15
1026                 QString re1 = "([+-]?\\d*[\\.,]?\\d*)"; // Float value
1027                 QString re2 = "([a-zA-Z]*)"; // SI unit
1028                 QString re3 = "\\/"; // Forward slash, not captured
1029                 QString re4 = "([+-]?\\d*[\\.,]?\\d*)"; // Float value
1030                 QString re5 = "([a-zA-Z]*)"; // SI unit
1031                 QRegExp regex(re1 + re2 + re3 + re4 + re5);
1032
1033                 const QString text = conv_threshold_cb_->currentText();
1034                 if (!regex.exactMatch(text))
1035                         return;  // String doesn't match the regex
1036
1037                 QStringList tokens = regex.capturedTexts();
1038
1039                 // For now, we simply assume that the unit is volt without modifiers
1040                 const double low_thr = tokens.at(1).toDouble();
1041                 const double high_thr = tokens.at(3).toDouble();
1042
1043                 // Only restart the conversion if one of the options was updated.
1044                 // We're starting a delayed conversion because the user may still be
1045                 // typing and the UI would lag if we kept on restarting it immediately
1046                 bool o1 = base_->set_conversion_option("threshold_value_low", low_thr);
1047                 bool o2 = base_->set_conversion_option("threshold_value_high", high_thr);
1048                 if (o1 || o2)
1049                         base_->start_conversion(true);  // Start delayed conversion
1050         }
1051
1052         base_->set_conversion_preset((SignalBase::ConversionPreset)index);
1053
1054         // Immediately start the conversion if we're not using custom values
1055         // (i.e. we're using one of the presets)
1056         if (!use_custom_thr)
1057                 base_->start_conversion();
1058 }
1059
1060 void AnalogSignal::on_delayed_conversion_starter()
1061 {
1062         base_->start_conversion();
1063 }
1064
1065 void AnalogSignal::on_display_type_changed(int index)
1066 {
1067         display_type_ = (DisplayType)(display_type_cb_->itemData(index).toInt());
1068
1069         if (owner_)
1070                 owner_->row_item_appearance_changed(false, true);
1071 }
1072
1073 } // namespace trace
1074 } // namespace views
1075 } // namespace pv