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