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
  81 const QColor AnalogSignal::ThresholdColor = QColor(0, 0, 0, 30 * 256 / 100);
  82 const QColor AnalogSignal::ThresholdColorLo = QColor(255, 0, 0, 8 * 256 / 100);
  83 const QColor AnalogSignal::ThresholdColorNe = QColor(0,   0, 0, 10 * 256 / 100);
  84 const QColor AnalogSignal::ThresholdColorHi = QColor(0, 255, 0, 8 * 256 / 100);
  85
  86 const int64_t AnalogSignal::TracePaintBlockSize = 1024 * 1024;  // 4 MiB (due to float)
  87 const float AnalogSignal::EnvelopeThreshold = 64.0f;
  88
  89 const int AnalogSignal::MaximumVDivs = 10;
  90 const int AnalogSignal::MinScaleIndex = -6;
  91 const int AnalogSignal::MaxScaleIndex = 7;
  92
  93 const int AnalogSignal::InfoTextMarginRight = 20;
  94 const int AnalogSignal::InfoTextMarginBottom = 5;
  95
  96 AnalogSignal::AnalogSignal(
  97         pv::Session &session,
  98         shared_ptr<data::SignalBase> base) :
  99         Signal(session, base),
 100         scale_index_(4), // 20 per div
 101         scale_index_drag_offset_(0),
 102         pos_vdivs_(1),
 103         neg_vdivs_(1),
 104         resolution_(0),
 105         display_type_(DisplayBoth),
 106         autoranging_(true)
 107 {
 108         axis_pen_ = AxisPen;
 109
 110         pv::data::Analog* analog_data =
 111                 dynamic_cast<pv::data::Analog*>(data().get());
 112
 113         connect(analog_data, SIGNAL(min_max_changed(float, float)),
 114                 this, SLOT(on_min_max_changed(float, float)));
 115
 116         GlobalSettings::register_change_handler(GlobalSettings::Key_View_ShowConversionThresholds,
 117                 bind(&AnalogSignal::on_settingViewShowConversionThresholds_changed, this, _1));
 118
 119         GlobalSettings gs;
 120         show_conversion_thresholds_ =
 121                 gs.value(GlobalSettings::Key_View_ShowConversionThresholds).toBool();
 122
 123         div_height_ = gs.value(GlobalSettings::Key_View_DefaultDivHeight).toInt();
 124
 125         base_->set_colour(SignalColours[base_->index() % countof(SignalColours)]);
 126         update_scale();
 127 }
 128
 129 shared_ptr<pv::data::SignalData> AnalogSignal::data() const
 130 {
 131         return base_->analog_data();
 132 }
 133
 134 void AnalogSignal::save_settings(QSettings &settings) const
 135 {
 136         settings.setValue("pos_vdivs", pos_vdivs_);
 137         settings.setValue("neg_vdivs", neg_vdivs_);
 138         settings.setValue("scale_index", scale_index_);
 139         settings.setValue("display_type", display_type_);
 140         settings.setValue("autoranging", autoranging_);
 141         settings.setValue("div_height", div_height_);
 142 }
 143
 144 void AnalogSignal::restore_settings(QSettings &settings)
 145 {
 146         if (settings.contains("pos_vdivs"))
 147                 pos_vdivs_ = settings.value("pos_vdivs").toInt();
 148
 149         if (settings.contains("neg_vdivs"))
 150                 neg_vdivs_ = settings.value("neg_vdivs").toInt();
 151
 152         if (settings.contains("scale_index")) {
 153                 scale_index_ = settings.value("scale_index").toInt();
 154                 update_scale();
 155         }
 156
 157         if (settings.contains("display_type"))
 158                 display_type_ = (DisplayType)(settings.value("display_type").toInt());
 159
 160         if (settings.contains("autoranging"))
 161                 autoranging_ = settings.value("autoranging").toBool();
 162
 163         if (settings.contains("div_height")) {
 164                 const int old_height = div_height_;
 165                 div_height_ = settings.value("div_height").toInt();
 166
 167                 if ((div_height_ != old_height) && owner_) {
 168                         // Call order is important, otherwise the lazy event handler won't work
 169                         owner_->extents_changed(false, true);
 170                         owner_->row_item_appearance_changed(false, true);
 171                 }
 172         }
 173 }
 174
 175 pair<int, int> AnalogSignal::v_extents() const
 176 {
 177         const int ph = pos_vdivs_ * div_height_;
 178         const int nh = neg_vdivs_ * div_height_;
 179         return make_pair(-ph, nh);
 180 }
 181
 182 int AnalogSignal::scale_handle_offset() const
 183 {
 184         const int h = (pos_vdivs_ + neg_vdivs_) * div_height_;
 185
 186         return ((scale_index_drag_offset_ - scale_index_) * h / 4) - h / 2;
 187 }
 188
 189 void AnalogSignal::scale_handle_dragged(int offset)
 190 {
 191         const int h = (pos_vdivs_ + neg_vdivs_) * div_height_;
 192
 193         scale_index_ = scale_index_drag_offset_ - (offset + h / 2) / (h / 4);
 194
 195         update_scale();
 196 }
 197
 198 void AnalogSignal::scale_handle_drag_release()
 199 {
 200         scale_index_drag_offset_ = scale_index_;
 201         update_scale();
 202 }
 203
 204 void AnalogSignal::paint_back(QPainter &p, ViewItemPaintParams &pp)
 205 {
 206         if (!base_->enabled())
 207                 return;
 208
 209         const vector<double> thresholds = base_->get_conversion_thresholds();
 210
 211         // Only display thresholds if we have some and we show analog samples
 212         if ((thresholds.size() > 0) && show_conversion_thresholds_ &&
 213                 ((display_type_ == DisplayAnalog) || (display_type_ == DisplayBoth))) {
 214
 215                 const int visual_y = get_visual_y();
 216                 const pair<int, int> extents = v_extents();
 217                 const int top = visual_y + extents.first;
 218                 const int btm = visual_y + extents.second;
 219
 220                 // Draw high/neutral/low areas
 221                 if (thresholds.size() == 2) {
 222                         const double thr_lo = visual_y - thresholds[0] * scale_;
 223                         const double thr_hi = visual_y - thresholds[1] * scale_;
 224
 225                         p.fillRect(QRectF(pp.left(), top, pp.width(), thr_hi - top),
 226                                 QBrush(ThresholdColorHi));
 227                         p.fillRect(QRectF(pp.left(), thr_hi, pp.width(), thr_lo - thr_hi),
 228                                 QBrush(ThresholdColorNe));
 229                         p.fillRect(QRectF(pp.left(), thr_lo, pp.width(), btm - thr_lo),
 230                                 QBrush(ThresholdColorLo));
 231                 } else {
 232                         const double thr = visual_y - thresholds[0] * scale_;
 233
 234                         p.fillRect(QRectF(pp.left(), top, pp.width(), thr - top),
 235                                 QBrush(ThresholdColorHi));
 236                         p.fillRect(QRectF(pp.left(), thr, pp.width(), btm - thr),
 237                                 QBrush(ThresholdColorLo));
 238                 }
 239
 240                 paint_axis(p, pp, get_visual_y());
 241         } else {
 242                 Trace::paint_back(p, pp);
 243                 paint_axis(p, pp, get_visual_y());
 244         }
 245 }
 246
 247 void AnalogSignal::paint_mid(QPainter &p, ViewItemPaintParams &pp)
 248 {
 249         assert(base_->analog_data());
 250         assert(owner_);
 251
 252         const int y = get_visual_y();
 253
 254         if (!base_->enabled())
 255                 return;
 256
 257         if ((display_type_ == DisplayAnalog) || (display_type_ == DisplayBoth)) {
 258                 paint_grid(p, y, pp.left(), pp.right());
 259
 260                 const deque< shared_ptr<pv::data::AnalogSegment> > &segments =
 261                         base_->analog_data()->analog_segments();
 262                 if (segments.empty())
 263                         return;
 264
 265                 const shared_ptr<pv::data::AnalogSegment> &segment =
 266                         segments.front();
 267
 268                 const double pixels_offset = pp.pixels_offset();
 269                 const double samplerate = max(1.0, segment->samplerate());
 270                 const pv::util::Timestamp& start_time = segment->start_time();
 271                 const int64_t last_sample = segment->get_sample_count() - 1;
 272                 const double samples_per_pixel = samplerate * pp.scale();
 273                 const pv::util::Timestamp start = samplerate * (pp.offset() - start_time);
 274                 const pv::util::Timestamp end = start + samples_per_pixel * pp.width();
 275
 276                 const int64_t start_sample = min(max(floor(start).convert_to<int64_t>(),
 277                         (int64_t)0), last_sample);
 278                 const int64_t end_sample = min(max((ceil(end) + 1).convert_to<int64_t>(),
 279                         (int64_t)0), last_sample);
 280
 281                 if (samples_per_pixel < EnvelopeThreshold)
 282                         paint_trace(p, segment, y, pp.left(),
 283                                 start_sample, end_sample,
 284                                 pixels_offset, samples_per_pixel);
 285                 else
 286                         paint_envelope(p, segment, y, pp.left(),
 287                                 start_sample, end_sample,
 288                                 pixels_offset, samples_per_pixel);
 289         }
 290
 291         if ((display_type_ == DisplayConverted) || (display_type_ == DisplayBoth))
 292                 paint_logic_mid(p, pp);
 293 }
 294
 295 void AnalogSignal::paint_fore(QPainter &p, ViewItemPaintParams &pp)
 296 {
 297         if (!enabled())
 298                 return;
 299
 300         if ((display_type_ == DisplayAnalog) || (display_type_ == DisplayBoth)) {
 301                 const int y = get_visual_y();
 302
 303                 // Show the info section on the right side of the trace
 304                 const QString infotext = QString("%1 V/div").arg(resolution_);
 305
 306                 p.setPen(base_->colour());
 307                 p.setFont(QApplication::font());
 308
 309                 const QRectF bounding_rect = QRectF(pp.left(),
 310                                 y + v_extents().first,
 311                                 pp.width() - InfoTextMarginRight,
 312                                 v_extents().second - v_extents().first - InfoTextMarginBottom);
 313
 314                 p.drawText(bounding_rect, Qt::AlignRight | Qt::AlignBottom, infotext);
 315         }
 316 }
 317
 318 void AnalogSignal::paint_grid(QPainter &p, int y, int left, int right)
 319 {
 320         p.setRenderHint(QPainter::Antialiasing, false);
 321
 322         GlobalSettings settings;
 323         const bool show_analog_minor_grid =
 324                 settings.value(GlobalSettings::Key_View_ShowAnalogMinorGrid).toBool();
 325
 326         if (pos_vdivs_ > 0) {
 327                 p.setPen(QPen(GridMajorColor, 1, Qt::DashLine));
 328                 for (int i = 1; i <= pos_vdivs_; i++) {
 329                         const float dy = i * div_height_;
 330                         p.drawLine(QLineF(left, y - dy, right, y - dy));
 331                 }
 332         }
 333
 334         if ((pos_vdivs_ > 0) && show_analog_minor_grid) {
 335                 p.setPen(QPen(GridMinorColor, 1, Qt::DashLine));
 336                 for (int i = 0; i < pos_vdivs_; i++) {
 337                         const float dy = i * div_height_;
 338                         const float dy25 = dy + (0.25 * div_height_);
 339                         const float dy50 = dy + (0.50 * div_height_);
 340                         const float dy75 = dy + (0.75 * div_height_);
 341                         p.drawLine(QLineF(left, y - dy25, right, y - dy25));
 342                         p.drawLine(QLineF(left, y - dy50, right, y - dy50));
 343                         p.drawLine(QLineF(left, y - dy75, right, y - dy75));
 344                 }
 345         }
 346
 347         if (neg_vdivs_ > 0) {
 348                 p.setPen(QPen(GridMajorColor, 1, Qt::DashLine));
 349                 for (int i = 1; i <= neg_vdivs_; i++) {
 350                         const float dy = i * div_height_;
 351                         p.drawLine(QLineF(left, y + dy, right, y + dy));
 352                 }
 353         }
 354
 355         if ((pos_vdivs_ > 0) && show_analog_minor_grid) {
 356                 p.setPen(QPen(GridMinorColor, 1, Qt::DashLine));
 357                 for (int i = 0; i < neg_vdivs_; i++) {
 358                         const float dy = i * div_height_;
 359                         const float dy25 = dy + (0.25 * div_height_);
 360                         const float dy50 = dy + (0.50 * div_height_);
 361                         const float dy75 = dy + (0.75 * div_height_);
 362                         p.drawLine(QLineF(left, y + dy25, right, y + dy25));
 363                         p.drawLine(QLineF(left, y + dy50, right, y + dy50));
 364                         p.drawLine(QLineF(left, y + dy75, right, y + dy75));
 365                 }
 366         }
 367
 368         p.setRenderHint(QPainter::Antialiasing, true);
 369 }
 370
 371 void AnalogSignal::paint_trace(QPainter &p,
 372         const shared_ptr<pv::data::AnalogSegment> &segment,
 373         int y, int left, const int64_t start, const int64_t end,
 374         const double pixels_offset, const double samples_per_pixel)
 375 {
 376         if (end <= start)
 377                 return;
 378
 379         // Calculate and paint the sampling points if enabled and useful
 380         GlobalSettings settings;
 381         const bool show_sampling_points =
 382                 settings.value(GlobalSettings::Key_View_ShowSamplingPoints).toBool() &&
 383                 (samples_per_pixel < 0.25);
 384
 385         p.setPen(base_->colour());
 386
 387         const int64_t points_count = end - start;
 388
 389         QPointF *points = new QPointF[points_count];
 390         QPointF *point = points;
 391
 392         QRectF *sampling_points = nullptr;
 393         if (show_sampling_points)
 394                  sampling_points = new QRectF[points_count];
 395         QRectF *sampling_point = sampling_points;
 396
 397         int64_t sample_count = min(points_count, TracePaintBlockSize);
 398         int64_t block_sample = 0;
 399         float *sample_block = new float[TracePaintBlockSize];
 400         segment->get_samples(start, start + sample_count, sample_block);
 401
 402         const int w = 2;
 403         for (int64_t sample = start; sample != end; sample++, block_sample++) {
 404
 405                 if (block_sample == TracePaintBlockSize) {
 406                         block_sample = 0;
 407                         sample_count = min(points_count - sample, TracePaintBlockSize);
 408                         segment->get_samples(sample, sample + sample_count, sample_block);
 409                 }
 410
 411                 const float x = (sample / samples_per_pixel -
 412                         pixels_offset) + left;
 413
 414                 *point++ = QPointF(x, y - sample_block[block_sample] * scale_);
 415
 416                 if (show_sampling_points)
 417                         *sampling_point++ =
 418                                 QRectF(x - (w / 2), y - sample_block[block_sample] * scale_ - (w / 2), w, w);
 419         }
 420         delete[] sample_block;
 421
 422         p.drawPolyline(points, points_count);
 423
 424         if (show_sampling_points) {
 425                 p.setPen(SamplingPointColour);
 426                 p.drawRects(sampling_points, points_count);
 427                 delete[] sampling_points;
 428         }
 429
 430         delete[] points;
 431 }
 432
 433 void AnalogSignal::paint_envelope(QPainter &p,
 434         const shared_ptr<pv::data::AnalogSegment> &segment,
 435         int y, int left, const int64_t start, const int64_t end,
 436         const double pixels_offset, const double samples_per_pixel)
 437 {
 438         using pv::data::AnalogSegment;
 439
 440         AnalogSegment::EnvelopeSection e;
 441         segment->get_envelope_section(e, start, end, samples_per_pixel);
 442
 443         if (e.length < 2)
 444                 return;
 445
 446         p.setPen(QPen(Qt::NoPen));
 447         p.setBrush(base_->colour());
 448
 449         QRectF *const rects = new QRectF[e.length];
 450         QRectF *rect = rects;
 451
 452         for (uint64_t sample = 0; sample < e.length - 1; sample++) {
 453                 const float x = ((e.scale * sample + e.start) /
 454                         samples_per_pixel - pixels_offset) + left;
 455                 const AnalogSegment::EnvelopeSample *const s =
 456                         e.samples + sample;
 457
 458                 // We overlap this sample with the next so that vertical
 459                 // gaps do not appear during steep rising or falling edges
 460                 const float b = y - max(s->max, (s + 1)->min) * scale_;
 461                 const float t = y - min(s->min, (s + 1)->max) * scale_;
 462
 463                 float h = b - t;
 464                 if (h >= 0.0f && h <= 1.0f)
 465                         h = 1.0f;
 466                 if (h <= 0.0f && h >= -1.0f)
 467                         h = -1.0f;
 468
 469                 *rect++ = QRectF(x, t, 1.0f, h);
 470         }
 471
 472         p.drawRects(rects, e.length);
 473
 474         delete[] rects;
 475         delete[] e.samples;
 476 }
 477
 478 void AnalogSignal::paint_logic_mid(QPainter &p, ViewItemPaintParams &pp)
 479 {
 480         QLineF *line;
 481
 482         vector< pair<int64_t, bool> > edges;
 483
 484         assert(base_);
 485
 486         const int y = get_visual_y();
 487
 488         if (!base_->enabled() || !base_->logic_data())
 489                 return;
 490
 491         const int signal_margin =
 492                 QFontMetrics(QApplication::font()).height() / 2;
 493
 494         const int ph = min(pos_vdivs_, 1) * div_height_;
 495         const int nh = min(neg_vdivs_, 1) * div_height_;
 496         const float high_offset = y - ph + signal_margin + 0.5f;
 497         const float low_offset = y + nh - signal_margin - 0.5f;
 498
 499         const deque< shared_ptr<pv::data::LogicSegment> > &segments =
 500                 base_->logic_data()->logic_segments();
 501
 502         if (segments.empty())
 503                 return;
 504
 505         const shared_ptr<pv::data::LogicSegment> &segment =
 506                 segments.front();
 507
 508         double samplerate = segment->samplerate();
 509
 510         // Show sample rate as 1Hz when it is unknown
 511         if (samplerate == 0.0)
 512                 samplerate = 1.0;
 513
 514         const double pixels_offset = pp.pixels_offset();
 515         const pv::util::Timestamp& start_time = segment->start_time();
 516         const int64_t last_sample = segment->get_sample_count() - 1;
 517         const double samples_per_pixel = samplerate * pp.scale();
 518         const double pixels_per_sample = 1 / samples_per_pixel;
 519         const pv::util::Timestamp start = samplerate * (pp.offset() - start_time);
 520         const pv::util::Timestamp end = start + samples_per_pixel * pp.width();
 521
 522         const int64_t start_sample = min(max(floor(start).convert_to<int64_t>(),
 523                 (int64_t)0), last_sample);
 524         const uint64_t end_sample = min(max(ceil(end).convert_to<int64_t>(),
 525                 (int64_t)0), last_sample);
 526
 527         segment->get_subsampled_edges(edges, start_sample, end_sample,
 528                 samples_per_pixel / LogicSignal::Oversampling, 0);
 529         assert(edges.size() >= 2);
 530
 531         // Check whether we need to paint the sampling points
 532         GlobalSettings settings;
 533         const bool show_sampling_points =
 534                 settings.value(GlobalSettings::Key_View_ShowSamplingPoints).toBool() &&
 535                 (samples_per_pixel < 0.25);
 536
 537         vector<QRectF> sampling_points;
 538         float sampling_point_x = 0.0f;
 539         int64_t sampling_point_sample = start_sample;
 540         const int w = 2;
 541
 542         if (show_sampling_points) {
 543                 sampling_points.reserve(end_sample - start_sample + 1);
 544                 sampling_point_x = (edges.cbegin()->first / samples_per_pixel - pixels_offset) + pp.left();
 545         }
 546
 547         // Paint the edges
 548         const unsigned int edge_count = edges.size() - 2;
 549         QLineF *const edge_lines = new QLineF[edge_count];
 550         line = edge_lines;
 551
 552         for (auto i = edges.cbegin() + 1; i != edges.cend() - 1; i++) {
 553                 const float x = ((*i).first / samples_per_pixel -
 554                         pixels_offset) + pp.left();
 555                 *line++ = QLineF(x, high_offset, x, low_offset);
 556
 557                 if (show_sampling_points)
 558                         while (sampling_point_sample < (*i).first) {
 559                                 const float y = (*i).second ? low_offset : high_offset;
 560                                 sampling_points.emplace_back(
 561                                         QRectF(sampling_point_x - (w / 2), y - (w / 2), w, w));
 562                                 sampling_point_sample++;
 563                                 sampling_point_x += pixels_per_sample;
 564                         };
 565         }
 566
 567         // Calculate the sample points from the last edge to the end of the trace
 568         if (show_sampling_points)
 569                 while ((uint64_t)sampling_point_sample <= end_sample) {
 570                         // Signal changed after the last edge, so the level is inverted
 571                         const float y = (edges.cend() - 1)->second ? high_offset : low_offset;
 572                         sampling_points.emplace_back(
 573                                 QRectF(sampling_point_x - (w / 2), y - (w / 2), w, w));
 574                         sampling_point_sample++;
 575                         sampling_point_x += pixels_per_sample;
 576                 };
 577
 578         p.setPen(LogicSignal::EdgeColour);
 579         p.drawLines(edge_lines, edge_count);
 580         delete[] edge_lines;
 581
 582         // Paint the caps
 583         const unsigned int max_cap_line_count = edges.size();
 584         QLineF *const cap_lines = new QLineF[max_cap_line_count];
 585
 586         p.setPen(LogicSignal::HighColour);
 587         paint_logic_caps(p, cap_lines, edges, true, samples_per_pixel,
 588                 pixels_offset, pp.left(), high_offset);
 589         p.setPen(LogicSignal::LowColour);
 590         paint_logic_caps(p, cap_lines, edges, false, samples_per_pixel,
 591                 pixels_offset, pp.left(), low_offset);
 592
 593         delete[] cap_lines;
 594
 595         // Paint the sampling points
 596         if (show_sampling_points) {
 597                 p.setPen(SamplingPointColour);
 598                 p.drawRects(sampling_points.data(), sampling_points.size());
 599         }
 600 }
 601
 602 void AnalogSignal::paint_logic_caps(QPainter &p, QLineF *const lines,
 603         vector< pair<int64_t, bool> > &edges, bool level,
 604         double samples_per_pixel, double pixels_offset, float x_offset,
 605         float y_offset)
 606 {
 607         QLineF *line = lines;
 608
 609         for (auto i = edges.begin(); i != (edges.end() - 1); i++)
 610                 if ((*i).second == level) {
 611                         *line++ = QLineF(
 612                                 ((*i).first / samples_per_pixel -
 613                                         pixels_offset) + x_offset, y_offset,
 614                                 ((*(i+1)).first / samples_per_pixel -
 615                                         pixels_offset) + x_offset, y_offset);
 616                 }
 617
 618         p.drawLines(lines, line - lines);
 619 }
 620
 621 float AnalogSignal::get_resolution(int scale_index)
 622 {
 623         const float seq[] = {1.0f, 2.0f, 5.0f};
 624
 625         const int offset = numeric_limits<int>::max() / (2 * countof(seq));
 626         const div_t d = div((int)(scale_index + countof(seq) * offset),
 627                 countof(seq));
 628
 629         return powf(10.0f, d.quot - offset) * seq[d.rem];
 630 }
 631
 632 void AnalogSignal::update_scale()
 633 {
 634         resolution_ = get_resolution(scale_index_);
 635         scale_ = div_height_ / resolution_;
 636 }
 637
 638 void AnalogSignal::update_conversion_widgets()
 639 {
 640         SignalBase::ConversionType conv_type = base_->get_conversion_type();
 641
 642         // Enable or disable widgets depending on conversion state
 643         conv_threshold_cb_->setEnabled(conv_type != SignalBase::NoConversion);
 644         display_type_cb_->setEnabled(conv_type != SignalBase::NoConversion);
 645
 646         conv_threshold_cb_->clear();
 647
 648         vector < pair<QString, int> > presets = base_->get_conversion_presets();
 649
 650         // Prevent the combo box from firing the "edit text changed" signal
 651         // as that would involuntarily select the first entry
 652         conv_threshold_cb_->blockSignals(true);
 653
 654         // Set available options depending on chosen conversion
 655         for (pair<QString, int> preset : presets)
 656                 conv_threshold_cb_->addItem(preset.first, preset.second);
 657
 658         map < QString, QVariant > options = base_->get_conversion_options();
 659
 660         if (conv_type == SignalBase::A2LConversionByThreshold) {
 661                 const vector<double> thresholds = base_->get_conversion_thresholds(
 662                                 SignalBase::A2LConversionByThreshold, true);
 663                 conv_threshold_cb_->addItem(
 664                                 QString("%1V").arg(QString::number(thresholds[0], 'f', 1)), -1);
 665         }
 666
 667         if (conv_type == SignalBase::A2LConversionBySchmittTrigger) {
 668                 const vector<double> thresholds = base_->get_conversion_thresholds(
 669                                 SignalBase::A2LConversionBySchmittTrigger, true);
 670                 conv_threshold_cb_->addItem(QString("%1V/%2V").arg(
 671                                 QString::number(thresholds[0], 'f', 1),
 672                                 QString::number(thresholds[1], 'f', 1)), -1);
 673         }
 674
 675         int preset_id = base_->get_current_conversion_preset();
 676         conv_threshold_cb_->setCurrentIndex(
 677                         conv_threshold_cb_->findData(preset_id));
 678
 679         conv_threshold_cb_->blockSignals(false);
 680 }
 681
 682 void AnalogSignal::perform_autoranging(bool keep_divs, bool force_update)
 683 {
 684         const deque< shared_ptr<pv::data::AnalogSegment> > &segments =
 685                 base_->analog_data()->analog_segments();
 686
 687         if (segments.empty())
 688                 return;
 689
 690         static double prev_min = 0, prev_max = 0;
 691         double min = 0, max = 0;
 692
 693         for (shared_ptr<pv::data::AnalogSegment> segment : segments) {
 694                 pair<double, double> mm = segment->get_min_max();
 695                 min = std::min(min, mm.first);
 696                 max = std::max(max, mm.second);
 697         }
 698
 699         if ((min == prev_min) && (max == prev_max) && !force_update)
 700                 return;
 701
 702         prev_min = min;
 703         prev_max = max;
 704
 705         // If we're allowed to alter the div assignment...
 706         if (!keep_divs) {
 707                 // Use all divs for the positive range if there are no negative values
 708                 if ((min == 0) && (neg_vdivs_ > 0)) {
 709                         pos_vdivs_ += neg_vdivs_;
 710                         neg_vdivs_ = 0;
 711                 }
 712
 713                 // Split up the divs if there are negative values but no negative divs
 714                 if ((min < 0) && (neg_vdivs_ == 0)) {
 715                         neg_vdivs_ = pos_vdivs_ / 2;
 716                         pos_vdivs_ -= neg_vdivs_;
 717                 }
 718         }
 719
 720         // If there is still no positive div when we need it, add one
 721         // (this can happen when pos_vdivs==neg_vdivs==0)
 722         if ((max > 0) && (pos_vdivs_ == 0)) {
 723                 pos_vdivs_ = 1;
 724                 owner_->extents_changed(false, true);
 725         }
 726
 727         // If there is still no negative div when we need it, add one
 728         // (this can happen when pos_vdivs was 0 or 1 when trying to split)
 729         if ((min < 0) && (neg_vdivs_ == 0)) {
 730                 neg_vdivs_ = 1;
 731                 owner_->extents_changed(false, true);
 732         }
 733
 734         double min_value_per_div;
 735         if ((pos_vdivs_ > 0) && (neg_vdivs_ >  0))
 736                 min_value_per_div = std::max(max / pos_vdivs_, -min / neg_vdivs_);
 737         else if (pos_vdivs_ > 0)
 738                 min_value_per_div = max / pos_vdivs_;
 739         else
 740                 min_value_per_div = -min / neg_vdivs_;
 741
 742         // Find first scale value that is bigger than the value we need
 743         for (int i = MinScaleIndex; i < MaxScaleIndex; i++)
 744                 if (get_resolution(i) > min_value_per_div) {
 745                         scale_index_ = i;
 746                         break;
 747                 }
 748
 749         update_scale();
 750 }
 751
 752 void AnalogSignal::populate_popup_form(QWidget *parent, QFormLayout *form)
 753 {
 754         // Add the standard options
 755         Signal::populate_popup_form(parent, form);
 756
 757         QFormLayout *const layout = new QFormLayout;
 758
 759         // Add div-related settings
 760         pvdiv_sb_ = new QSpinBox(parent);
 761         pvdiv_sb_->setRange(0, MaximumVDivs);
 762         pvdiv_sb_->setValue(pos_vdivs_);
 763         connect(pvdiv_sb_, SIGNAL(valueChanged(int)),
 764                 this, SLOT(on_pos_vdivs_changed(int)));
 765         layout->addRow(tr("Number of pos vertical divs"), pvdiv_sb_);
 766
 767         nvdiv_sb_ = new QSpinBox(parent);
 768         nvdiv_sb_->setRange(0, MaximumVDivs);
 769         nvdiv_sb_->setValue(neg_vdivs_);
 770         connect(nvdiv_sb_, SIGNAL(valueChanged(int)),
 771                 this, SLOT(on_neg_vdivs_changed(int)));
 772         layout->addRow(tr("Number of neg vertical divs"), nvdiv_sb_);
 773
 774         div_height_sb_ = new QSpinBox(parent);
 775         div_height_sb_->setRange(20, 1000);
 776         div_height_sb_->setSingleStep(5);
 777         div_height_sb_->setSuffix(tr(" pixels"));
 778         div_height_sb_->setValue(div_height_);
 779         connect(div_height_sb_, SIGNAL(valueChanged(int)),
 780                 this, SLOT(on_div_height_changed(int)));
 781         layout->addRow(tr("Div height"), div_height_sb_);
 782
 783         // Add the vertical resolution
 784         resolution_cb_ = new QComboBox(parent);
 785
 786         for (int i = MinScaleIndex; i < MaxScaleIndex; i++) {
 787                 const QString label = QString("%1").arg(get_resolution(i));
 788                 resolution_cb_->insertItem(0, label, QVariant(i));
 789         }
 790
 791         int cur_idx = resolution_cb_->findData(QVariant(scale_index_));
 792         resolution_cb_->setCurrentIndex(cur_idx);
 793
 794         connect(resolution_cb_, SIGNAL(currentIndexChanged(int)),
 795                 this, SLOT(on_resolution_changed(int)));
 796
 797         QGridLayout *const vdiv_layout = new QGridLayout;
 798         QLabel *const vdiv_unit = new QLabel(tr("V/div"));
 799         vdiv_layout->addWidget(resolution_cb_, 0, 0);
 800         vdiv_layout->addWidget(vdiv_unit, 0, 1);
 801
 802         layout->addRow(tr("Vertical resolution"), vdiv_layout);
 803
 804         // Add the autoranging checkbox
 805         QCheckBox* autoranging_cb = new QCheckBox();
 806         autoranging_cb->setCheckState(autoranging_ ? Qt::Checked : Qt::Unchecked);
 807
 808         connect(autoranging_cb, SIGNAL(stateChanged(int)),
 809                 this, SLOT(on_autoranging_changed(int)));
 810
 811         layout->addRow(tr("Autoranging"), autoranging_cb);
 812
 813         // Add the conversion type dropdown
 814         conversion_cb_ = new QComboBox();
 815
 816         conversion_cb_->addItem(tr("none"),
 817                 SignalBase::NoConversion);
 818         conversion_cb_->addItem(tr("to logic via threshold"),
 819                 SignalBase::A2LConversionByThreshold);
 820         conversion_cb_->addItem(tr("to logic via schmitt-trigger"),
 821                 SignalBase::A2LConversionBySchmittTrigger);
 822
 823         cur_idx = conversion_cb_->findData(QVariant(base_->get_conversion_type()));
 824         conversion_cb_->setCurrentIndex(cur_idx);
 825
 826         layout->addRow(tr("Conversion"), conversion_cb_);
 827
 828         connect(conversion_cb_, SIGNAL(currentIndexChanged(int)),
 829                 this, SLOT(on_conversion_changed(int)));
 830
 831     // Add the conversion threshold settings
 832     conv_threshold_cb_ = new QComboBox();
 833     conv_threshold_cb_->setEditable(true);
 834
 835     layout->addRow(tr("Conversion threshold(s)"), conv_threshold_cb_);
 836
 837     connect(conv_threshold_cb_, SIGNAL(currentIndexChanged(int)),
 838             this, SLOT(on_conv_threshold_changed(int)));
 839     connect(conv_threshold_cb_, SIGNAL(editTextChanged(const QString)),
 840             this, SLOT(on_conv_threshold_changed()));  // index will be -1
 841
 842         // Add the display type dropdown
 843         display_type_cb_ = new QComboBox();
 844
 845         display_type_cb_->addItem(tr("analog"), DisplayAnalog);
 846         display_type_cb_->addItem(tr("converted"), DisplayConverted);
 847         display_type_cb_->addItem(tr("analog+converted"), DisplayBoth);
 848
 849         cur_idx = display_type_cb_->findData(QVariant(display_type_));
 850         display_type_cb_->setCurrentIndex(cur_idx);
 851
 852         layout->addRow(tr("Show traces for"), display_type_cb_);
 853
 854         connect(display_type_cb_, SIGNAL(currentIndexChanged(int)),
 855                 this, SLOT(on_display_type_changed(int)));
 856
 857         // Update the conversion widget contents and states
 858         update_conversion_widgets();
 859
 860         form->addRow(layout);
 861 }
 862
 863 void AnalogSignal::on_min_max_changed(float min, float max)
 864 {
 865         (void)min;
 866         (void)max;
 867
 868         if (autoranging_)
 869                 perform_autoranging(false, false);
 870 }
 871
 872 void AnalogSignal::on_pos_vdivs_changed(int vdivs)
 873 {
 874         if (vdivs == pos_vdivs_)
 875                 return;
 876
 877         pos_vdivs_ = vdivs;
 878
 879         // There has to be at least one div, positive or negative
 880         if ((neg_vdivs_ == 0) && (pos_vdivs_ == 0)) {
 881                 pos_vdivs_ = 1;
 882                 if (pvdiv_sb_)
 883                         pvdiv_sb_->setValue(pos_vdivs_);
 884         }
 885
 886         if (autoranging_) {
 887                 perform_autoranging(true, true);
 888
 889                 // It could be that a positive or negative div was added, so update
 890                 if (pvdiv_sb_) {
 891                         pvdiv_sb_->setValue(pos_vdivs_);
 892                         nvdiv_sb_->setValue(neg_vdivs_);
 893                 }
 894         }
 895
 896         if (owner_) {
 897                 // Call order is important, otherwise the lazy event handler won't work
 898                 owner_->extents_changed(false, true);
 899                 owner_->row_item_appearance_changed(false, true);
 900         }
 901 }
 902
 903 void AnalogSignal::on_neg_vdivs_changed(int vdivs)
 904 {
 905         if (vdivs == neg_vdivs_)
 906                 return;
 907
 908         neg_vdivs_ = vdivs;
 909
 910         // There has to be at least one div, positive or negative
 911         if ((neg_vdivs_ == 0) && (pos_vdivs_ == 0)) {
 912                 pos_vdivs_ = 1;
 913                 if (pvdiv_sb_)
 914                         pvdiv_sb_->setValue(pos_vdivs_);
 915         }
 916
 917         if (autoranging_) {
 918                 perform_autoranging(true, true);
 919
 920                 // It could be that a positive or negative div was added, so update
 921                 if (pvdiv_sb_) {
 922                         pvdiv_sb_->setValue(pos_vdivs_);
 923                         nvdiv_sb_->setValue(neg_vdivs_);
 924                 }
 925         }
 926
 927         if (owner_) {
 928                 // Call order is important, otherwise the lazy event handler won't work
 929                 owner_->extents_changed(false, true);
 930                 owner_->row_item_appearance_changed(false, true);
 931         }
 932 }
 933
 934 void AnalogSignal::on_div_height_changed(int height)
 935 {
 936         div_height_ = height;
 937         update_scale();
 938
 939         if (owner_) {
 940                 // Call order is important, otherwise the lazy event handler won't work
 941                 owner_->extents_changed(false, true);
 942                 owner_->row_item_appearance_changed(false, true);
 943         }
 944 }
 945
 946 void AnalogSignal::on_resolution_changed(int index)
 947 {
 948         scale_index_ = resolution_cb_->itemData(index).toInt();
 949         update_scale();
 950
 951         if (owner_)
 952                 owner_->row_item_appearance_changed(false, true);
 953 }
 954
 955 void AnalogSignal::on_autoranging_changed(int state)
 956 {
 957         autoranging_ = (state == Qt::Checked);
 958
 959         if (autoranging_)
 960                 perform_autoranging(false, true);
 961
 962         if (owner_) {
 963                 // Call order is important, otherwise the lazy event handler won't work
 964                 owner_->extents_changed(false, true);
 965                 owner_->row_item_appearance_changed(false, true);
 966         }
 967 }
 968
 969 void AnalogSignal::on_conversion_changed(int index)
 970 {
 971         SignalBase::ConversionType old_conv_type = base_->get_conversion_type();
 972
 973         SignalBase::ConversionType conv_type =
 974                 (SignalBase::ConversionType)(conversion_cb_->itemData(index).toInt());
 975
 976         if (conv_type != old_conv_type) {
 977                 base_->set_conversion_type(conv_type);
 978                 update_conversion_widgets();
 979
 980                 if (owner_)
 981                         owner_->row_item_appearance_changed(false, true);
 982         }
 983 }
 984
 985 void AnalogSignal::on_conv_threshold_changed(int index)
 986 {
 987         SignalBase::ConversionType conv_type = base_->get_conversion_type();
 988
 989         // Note: index is set to -1 if the text in the combo box matches none of
 990         // the entries in the combo box
 991
 992         if ((index == -1) && (conv_threshold_cb_->currentText().length() == 0))
 993                 return;
 994
 995         // The combo box entry with the custom value has user_data set to -1
 996         const int user_data = conv_threshold_cb_->findText(
 997                         conv_threshold_cb_->currentText());
 998
 999         const bool use_custom_thr = (index == -1) || (user_data == -1);
1000
1001         if (conv_type == SignalBase::A2LConversionByThreshold && use_custom_thr) {
1002                 // Not one of the preset values, try to parse the combo box text
1003                 // Note: Regex loosely based on
1004                 // https://txt2re.com/index-c++.php3?s=0.1V&1&-13
1005                 QString re1 = "([+-]?\\d*[\\.,]?\\d*)"; // Float value
1006                 QString re2 = "([a-zA-Z]*)"; // SI unit
1007                 QRegExp regex(re1 + re2);
1008
1009                 const QString text = conv_threshold_cb_->currentText();
1010                 if (!regex.exactMatch(text))
1011                         return;  // String doesn't match the regex
1012
1013                 QStringList tokens = regex.capturedTexts();
1014
1015                 // For now, we simply assume that the unit is volt without modifiers
1016                 const double thr = tokens.at(1).toDouble();
1017
1018                 // Only restart the conversion if the threshold was updated.
1019                 // We're starting a delayed conversion because the user may still be
1020                 // typing and the UI would lag if we kept on restarting it immediately
1021                 if (base_->set_conversion_option("threshold_value", thr))
1022                         base_->start_conversion(true);
1023         }
1024
1025         if (conv_type == SignalBase::A2LConversionBySchmittTrigger && use_custom_thr) {
1026                 // Not one of the preset values, try to parse the combo box text
1027                 // Note: Regex loosely based on
1028                 // https://txt2re.com/index-c++.php3?s=0.1V/0.2V&2&14&-22&3&15
1029                 QString re1 = "([+-]?\\d*[\\.,]?\\d*)"; // Float value
1030                 QString re2 = "([a-zA-Z]*)"; // SI unit
1031                 QString re3 = "\\/"; // Forward slash, not captured
1032                 QString re4 = "([+-]?\\d*[\\.,]?\\d*)"; // Float value
1033                 QString re5 = "([a-zA-Z]*)"; // SI unit
1034                 QRegExp regex(re1 + re2 + re3 + re4 + re5);
1035
1036                 const QString text = conv_threshold_cb_->currentText();
1037                 if (!regex.exactMatch(text))
1038                         return;  // String doesn't match the regex
1039
1040                 QStringList tokens = regex.capturedTexts();
1041
1042                 // For now, we simply assume that the unit is volt without modifiers
1043                 const double low_thr = tokens.at(1).toDouble();
1044                 const double high_thr = tokens.at(3).toDouble();
1045
1046                 // Only restart the conversion if one of the options was updated.
1047                 // We're starting a delayed conversion because the user may still be
1048                 // typing and the UI would lag if we kept on restarting it immediately
1049                 bool o1 = base_->set_conversion_option("threshold_value_low", low_thr);
1050                 bool o2 = base_->set_conversion_option("threshold_value_high", high_thr);
1051                 if (o1 || o2)
1052                         base_->start_conversion(true);  // Start delayed conversion
1053         }
1054
1055         base_->set_conversion_preset((SignalBase::ConversionPreset)index);
1056
1057         // Immediately start the conversion if we're not using custom values
1058         // (i.e. we're using one of the presets)
1059         if (!use_custom_thr)
1060                 base_->start_conversion();
1061 }
1062
1063 void AnalogSignal::on_delayed_conversion_starter()
1064 {
1065         base_->start_conversion();
1066 }
1067
1068 void AnalogSignal::on_display_type_changed(int index)
1069 {
1070         display_type_ = (DisplayType)(display_type_cb_->itemData(index).toInt());
1071
1072         if (owner_)
1073                 owner_->row_item_appearance_changed(false, true);
1074 }
1075
1076 void AnalogSignal::on_settingViewShowConversionThresholds_changed(const QVariant new_value)
1077 {
1078         show_conversion_thresholds_ = new_value.toBool();
1079
1080         if (owner_)
1081                 owner_->row_item_appearance_changed(false, true);
1082 }
1083
1084 } // namespace trace
1085 } // namespace views
1086 } // namespace pv