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 QColor AnalogSignal::GridMajorColor = QColor(0, 0, 0, 40 * 256 / 100);
  74 const QColor AnalogSignal::GridMinorColor = QColor(0, 0, 0, 20 * 256 / 100);
  75
  76 const QColor AnalogSignal::SamplingPointColour(0x77, 0x77, 0x77);
  77
  78 const int64_t AnalogSignal::TracePaintBlockSize = 1024 * 1024;  // 4 MiB (due to float)
  79 const float AnalogSignal::EnvelopeThreshold = 64.0f;
  80
  81 const int AnalogSignal::MaximumVDivs = 10;
  82 const int AnalogSignal::MinScaleIndex = -6;
  83 const int AnalogSignal::MaxScaleIndex = 7;
  84
  85 const int AnalogSignal::InfoTextMarginRight = 20;
  86 const int AnalogSignal::InfoTextMarginBottom = 5;
  87
  88 AnalogSignal::AnalogSignal(
  89         pv::Session &session,
  90         shared_ptr<data::SignalBase> base) :
  91         Signal(session, base),
  92         scale_index_(4), // 20 per div
  93         scale_index_drag_offset_(0),
  94         pos_vdivs_(1),
  95         neg_vdivs_(1),
  96         resolution_(0),
  97         display_type_(DisplayBoth),
  98         autoranging_(true)
  99 {
 100         pv::data::Analog* analog_data =
 101                 dynamic_cast<pv::data::Analog*>(data().get());
 102
 103         connect(analog_data, SIGNAL(samples_added(QObject*, uint64_t, uint64_t)),
 104                 this, SLOT(on_samples_added()));
 105
 106         connect(&delayed_conversion_starter_, SIGNAL(timeout()),
 107                 this, SLOT(on_delayed_conversion_starter()));
 108         delayed_conversion_starter_.setSingleShot(true);
 109         delayed_conversion_starter_.setInterval(1000);  // 1s timeout
 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         if ((display_type_ == DisplayConverted) || (display_type_ == DisplayBoth)) {
 246                 const SignalBase::ConversionType conv_type = base_->get_conversion_type();
 247
 248                 if (((conv_type == SignalBase::A2LConversionByTreshold) ||
 249                         (conv_type == SignalBase::A2LConversionBySchmittTrigger)))
 250                         paint_logic_mid(p, pp);
 251         }
 252 }
 253
 254 void AnalogSignal::paint_fore(QPainter &p, ViewItemPaintParams &pp)
 255 {
 256         if (!enabled())
 257                 return;
 258
 259         if ((display_type_ == DisplayAnalog) || (display_type_ == DisplayBoth)) {
 260                 const int y = get_visual_y();
 261
 262                 // Show the info section on the right side of the trace
 263                 const QString infotext = QString("%1 V/div").arg(resolution_);
 264
 265                 p.setPen(base_->colour());
 266                 p.setFont(QApplication::font());
 267
 268                 const QRectF bounding_rect = QRectF(pp.left(),
 269                                 y + v_extents().first,
 270                                 pp.width() - InfoTextMarginRight,
 271                                 v_extents().second - v_extents().first - InfoTextMarginBottom);
 272
 273                 p.drawText(bounding_rect, Qt::AlignRight | Qt::AlignBottom, infotext);
 274         }
 275 }
 276
 277 void AnalogSignal::paint_grid(QPainter &p, int y, int left, int right)
 278 {
 279         p.setRenderHint(QPainter::Antialiasing, false);
 280
 281         GlobalSettings settings;
 282         const bool show_analog_minor_grid =
 283                 settings.value(GlobalSettings::Key_View_ShowAnalogMinorGrid).toBool();
 284
 285         if (pos_vdivs_ > 0) {
 286                 p.setPen(QPen(GridMajorColor, 1, Qt::DashLine));
 287                 for (int i = 1; i <= pos_vdivs_; i++) {
 288                         const float dy = i * div_height_;
 289                         p.drawLine(QLineF(left, y - dy, right, y - dy));
 290                 }
 291         }
 292
 293         if ((pos_vdivs_ > 0) && show_analog_minor_grid) {
 294                 p.setPen(QPen(GridMinorColor, 1, Qt::DashLine));
 295                 for (int i = 0; i < pos_vdivs_; i++) {
 296                         const float dy = i * div_height_;
 297                         const float dy25 = dy + (0.25 * div_height_);
 298                         const float dy50 = dy + (0.50 * div_height_);
 299                         const float dy75 = dy + (0.75 * div_height_);
 300                         p.drawLine(QLineF(left, y - dy25, right, y - dy25));
 301                         p.drawLine(QLineF(left, y - dy50, right, y - dy50));
 302                         p.drawLine(QLineF(left, y - dy75, right, y - dy75));
 303                 }
 304         }
 305
 306         if (neg_vdivs_ > 0) {
 307                 p.setPen(QPen(GridMajorColor, 1, Qt::DashLine));
 308                 for (int i = 1; i <= neg_vdivs_; i++) {
 309                         const float dy = i * div_height_;
 310                         p.drawLine(QLineF(left, y + dy, right, y + dy));
 311                 }
 312         }
 313
 314         if ((pos_vdivs_ > 0) && show_analog_minor_grid) {
 315                 p.setPen(QPen(GridMinorColor, 1, Qt::DashLine));
 316                 for (int i = 0; i < neg_vdivs_; i++) {
 317                         const float dy = i * div_height_;
 318                         const float dy25 = dy + (0.25 * div_height_);
 319                         const float dy50 = dy + (0.50 * div_height_);
 320                         const float dy75 = dy + (0.75 * div_height_);
 321                         p.drawLine(QLineF(left, y + dy25, right, y + dy25));
 322                         p.drawLine(QLineF(left, y + dy50, right, y + dy50));
 323                         p.drawLine(QLineF(left, y + dy75, right, y + dy75));
 324                 }
 325         }
 326
 327         p.setRenderHint(QPainter::Antialiasing, true);
 328 }
 329
 330 void AnalogSignal::paint_trace(QPainter &p,
 331         const shared_ptr<pv::data::AnalogSegment> &segment,
 332         int y, int left, const int64_t start, const int64_t end,
 333         const double pixels_offset, const double samples_per_pixel)
 334 {
 335         if (end <= start)
 336                 return;
 337
 338         // Calculate and paint the sampling points if enabled and useful
 339         GlobalSettings settings;
 340         const bool show_sampling_points =
 341                 settings.value(GlobalSettings::Key_View_ShowSamplingPoints).toBool() &&
 342                 (samples_per_pixel < 0.25);
 343
 344         p.setPen(base_->colour());
 345
 346         const int64_t points_count = end - start;
 347
 348         QPointF *points = new QPointF[points_count];
 349         QPointF *point = points;
 350
 351         QRectF *sampling_points = nullptr;
 352         if (show_sampling_points)
 353                  sampling_points = new QRectF[points_count];
 354         QRectF *sampling_point = sampling_points;
 355
 356         int64_t sample_count = min(points_count, TracePaintBlockSize);
 357         int64_t block_sample = 0;
 358         float *sample_block = new float[TracePaintBlockSize];
 359         segment->get_samples(start, start + sample_count, sample_block);
 360
 361         const int w = 2;
 362         for (int64_t sample = start; sample != end; sample++, block_sample++) {
 363
 364                 if (block_sample == TracePaintBlockSize) {
 365                         block_sample = 0;
 366                         sample_count = min(points_count - sample, TracePaintBlockSize);
 367                         segment->get_samples(sample, sample + sample_count, sample_block);
 368                 }
 369
 370                 const float x = (sample / samples_per_pixel -
 371                         pixels_offset) + left;
 372
 373                 *point++ = QPointF(x, y - sample_block[block_sample] * scale_);
 374
 375                 if (show_sampling_points)
 376                         *sampling_point++ =
 377                                 QRectF(x - (w / 2), y - sample_block[block_sample] * scale_ - (w / 2), w, w);
 378         }
 379         delete[] sample_block;
 380
 381         p.drawPolyline(points, points_count);
 382
 383         if (show_sampling_points) {
 384                 p.setPen(SamplingPointColour);
 385                 p.drawRects(sampling_points, points_count);
 386                 delete[] sampling_points;
 387         }
 388
 389         delete[] points;
 390 }
 391
 392 void AnalogSignal::paint_envelope(QPainter &p,
 393         const shared_ptr<pv::data::AnalogSegment> &segment,
 394         int y, int left, const int64_t start, const int64_t end,
 395         const double pixels_offset, const double samples_per_pixel)
 396 {
 397         using pv::data::AnalogSegment;
 398
 399         AnalogSegment::EnvelopeSection e;
 400         segment->get_envelope_section(e, start, end, samples_per_pixel);
 401
 402         if (e.length < 2)
 403                 return;
 404
 405         p.setPen(QPen(Qt::NoPen));
 406         p.setBrush(base_->colour());
 407
 408         QRectF *const rects = new QRectF[e.length];
 409         QRectF *rect = rects;
 410
 411         for (uint64_t sample = 0; sample < e.length - 1; sample++) {
 412                 const float x = ((e.scale * sample + e.start) /
 413                         samples_per_pixel - pixels_offset) + left;
 414                 const AnalogSegment::EnvelopeSample *const s =
 415                         e.samples + sample;
 416
 417                 // We overlap this sample with the next so that vertical
 418                 // gaps do not appear during steep rising or falling edges
 419                 const float b = y - max(s->max, (s + 1)->min) * scale_;
 420                 const float t = y - min(s->min, (s + 1)->max) * scale_;
 421
 422                 float h = b - t;
 423                 if (h >= 0.0f && h <= 1.0f)
 424                         h = 1.0f;
 425                 if (h <= 0.0f && h >= -1.0f)
 426                         h = -1.0f;
 427
 428                 *rect++ = QRectF(x, t, 1.0f, h);
 429         }
 430
 431         p.drawRects(rects, e.length);
 432
 433         delete[] rects;
 434         delete[] e.samples;
 435 }
 436
 437 void AnalogSignal::paint_logic_mid(QPainter &p, ViewItemPaintParams &pp)
 438 {
 439         QLineF *line;
 440
 441         vector< pair<int64_t, bool> > edges;
 442
 443         assert(base_);
 444
 445         const int y = get_visual_y();
 446
 447         if (!base_->enabled() || !base_->logic_data())
 448                 return;
 449
 450         const int signal_margin =
 451                 QFontMetrics(QApplication::font()).height() / 2;
 452
 453         const int ph = min(pos_vdivs_, 1) * div_height_;
 454         const int nh = min(neg_vdivs_, 1) * div_height_;
 455         const float high_offset = y - ph + signal_margin + 0.5f;
 456         const float low_offset = y + nh - signal_margin - 0.5f;
 457
 458         const deque< shared_ptr<pv::data::LogicSegment> > &segments =
 459                 base_->logic_data()->logic_segments();
 460
 461         if (segments.empty())
 462                 return;
 463
 464         const shared_ptr<pv::data::LogicSegment> &segment =
 465                 segments.front();
 466
 467         double samplerate = segment->samplerate();
 468
 469         // Show sample rate as 1Hz when it is unknown
 470         if (samplerate == 0.0)
 471                 samplerate = 1.0;
 472
 473         const double pixels_offset = pp.pixels_offset();
 474         const pv::util::Timestamp& start_time = segment->start_time();
 475         const int64_t last_sample = segment->get_sample_count() - 1;
 476         const double samples_per_pixel = samplerate * pp.scale();
 477         const double pixels_per_sample = 1 / samples_per_pixel;
 478         const pv::util::Timestamp start = samplerate * (pp.offset() - start_time);
 479         const pv::util::Timestamp end = start + samples_per_pixel * pp.width();
 480
 481         const int64_t start_sample = min(max(floor(start).convert_to<int64_t>(),
 482                 (int64_t)0), last_sample);
 483         const uint64_t end_sample = min(max(ceil(end).convert_to<int64_t>(),
 484                 (int64_t)0), last_sample);
 485
 486         segment->get_subsampled_edges(edges, start_sample, end_sample,
 487                 samples_per_pixel / LogicSignal::Oversampling, 0);
 488         assert(edges.size() >= 2);
 489
 490         // Check whether we need to paint the sampling points
 491         GlobalSettings settings;
 492         const bool show_sampling_points =
 493                 settings.value(GlobalSettings::Key_View_ShowSamplingPoints).toBool() &&
 494                 (samples_per_pixel < 0.25);
 495
 496         vector<QRectF> sampling_points;
 497         float sampling_point_x = 0.0f;
 498         int64_t sampling_point_sample = start_sample;
 499         const int w = 2;
 500
 501         if (show_sampling_points) {
 502                 sampling_points.reserve(end_sample - start_sample + 1);
 503                 sampling_point_x = (edges.cbegin()->first / samples_per_pixel - pixels_offset) + pp.left();
 504         }
 505
 506         // Paint the edges
 507         const unsigned int edge_count = edges.size() - 2;
 508         QLineF *const edge_lines = new QLineF[edge_count];
 509         line = edge_lines;
 510
 511         for (auto i = edges.cbegin() + 1; i != edges.cend() - 1; i++) {
 512                 const float x = ((*i).first / samples_per_pixel -
 513                         pixels_offset) + pp.left();
 514                 *line++ = QLineF(x, high_offset, x, low_offset);
 515
 516                 if (show_sampling_points)
 517                         while (sampling_point_sample < (*i).first) {
 518                                 const float y = (*i).second ? low_offset : high_offset;
 519                                 sampling_points.emplace_back(
 520                                         QRectF(sampling_point_x - (w / 2), y - (w / 2), w, w));
 521                                 sampling_point_sample++;
 522                                 sampling_point_x += pixels_per_sample;
 523                         };
 524         }
 525
 526         // Calculate the sample points from the last edge to the end of the trace
 527         if (show_sampling_points)
 528                 while ((uint64_t)sampling_point_sample <= end_sample) {
 529                         // Signal changed after the last edge, so the level is inverted
 530                         const float y = (edges.cend() - 1)->second ? high_offset : low_offset;
 531                         sampling_points.emplace_back(
 532                                 QRectF(sampling_point_x - (w / 2), y - (w / 2), w, w));
 533                         sampling_point_sample++;
 534                         sampling_point_x += pixels_per_sample;
 535                 };
 536
 537         p.setPen(LogicSignal::EdgeColour);
 538         p.drawLines(edge_lines, edge_count);
 539         delete[] edge_lines;
 540
 541         // Paint the caps
 542         const unsigned int max_cap_line_count = edges.size();
 543         QLineF *const cap_lines = new QLineF[max_cap_line_count];
 544
 545         p.setPen(LogicSignal::HighColour);
 546         paint_logic_caps(p, cap_lines, edges, true, samples_per_pixel,
 547                 pixels_offset, pp.left(), high_offset);
 548         p.setPen(LogicSignal::LowColour);
 549         paint_logic_caps(p, cap_lines, edges, false, samples_per_pixel,
 550                 pixels_offset, pp.left(), low_offset);
 551
 552         delete[] cap_lines;
 553
 554         // Paint the sampling points
 555         if (show_sampling_points) {
 556                 p.setPen(SamplingPointColour);
 557                 p.drawRects(sampling_points.data(), sampling_points.size());
 558         }
 559 }
 560
 561 void AnalogSignal::paint_logic_caps(QPainter &p, QLineF *const lines,
 562         vector< pair<int64_t, bool> > &edges, bool level,
 563         double samples_per_pixel, double pixels_offset, float x_offset,
 564         float y_offset)
 565 {
 566         QLineF *line = lines;
 567
 568         for (auto i = edges.begin(); i != (edges.end() - 1); i++)
 569                 if ((*i).second == level) {
 570                         *line++ = QLineF(
 571                                 ((*i).first / samples_per_pixel -
 572                                         pixels_offset) + x_offset, y_offset,
 573                                 ((*(i+1)).first / samples_per_pixel -
 574                                         pixels_offset) + x_offset, y_offset);
 575                 }
 576
 577         p.drawLines(lines, line - lines);
 578 }
 579
 580 float AnalogSignal::get_resolution(int scale_index)
 581 {
 582         const float seq[] = {1.0f, 2.0f, 5.0f};
 583
 584         const int offset = numeric_limits<int>::max() / (2 * countof(seq));
 585         const div_t d = div((int)(scale_index + countof(seq) * offset),
 586                 countof(seq));
 587
 588         return powf(10.0f, d.quot - offset) * seq[d.rem];
 589 }
 590
 591 void AnalogSignal::update_scale()
 592 {
 593         resolution_ = get_resolution(scale_index_);
 594         scale_ = div_height_ / resolution_;
 595 }
 596
 597 void AnalogSignal::update_conversion_widgets()
 598 {
 599         SignalBase::ConversionType conv_type = base_->get_conversion_type();
 600
 601         // Enable or disable widgets depending on conversion state
 602         conv_threshold_cb_->setEnabled(conv_type != SignalBase::NoConversion);
 603         display_type_cb_->setEnabled(conv_type != SignalBase::NoConversion);
 604
 605         conv_threshold_cb_->clear();
 606
 607         vector < pair<QString, int> > presets = base_->get_conversion_presets();
 608
 609         // Prevent the combo box from firing the "edit text changed" signal
 610         // as that would involuntarily select the first entry
 611         conv_threshold_cb_->blockSignals(true);
 612
 613         // Set available options depending on chosen conversion
 614         for (pair<QString, int> preset : presets)
 615                 conv_threshold_cb_->addItem(preset.first, preset.second);
 616
 617         map < QString, QVariant > options = base_->get_conversion_options();
 618
 619         if (conv_type == SignalBase::A2LConversionByTreshold) {
 620                 const vector<double> thresholds = base_->get_conversion_thresholds(
 621                                 SignalBase::A2LConversionByTreshold, true);
 622                 conv_threshold_cb_->addItem(
 623                                 QString("%1V").arg(QString::number(thresholds[0], 'f', 1)), -1);
 624         }
 625
 626         if (conv_type == SignalBase::A2LConversionBySchmittTrigger) {
 627                 const vector<double> thresholds = base_->get_conversion_thresholds(
 628                                 SignalBase::A2LConversionBySchmittTrigger, true);
 629                 conv_threshold_cb_->addItem(QString("%1V/%2V").arg(
 630                                 QString::number(thresholds[0], 'f', 1),
 631                                 QString::number(thresholds[1], 'f', 1)), -1);
 632         }
 633
 634         int preset_id = base_->get_current_conversion_preset();
 635         conv_threshold_cb_->setCurrentIndex(
 636                         conv_threshold_cb_->findData(preset_id));
 637
 638         conv_threshold_cb_->blockSignals(false);
 639 }
 640
 641 void AnalogSignal::perform_autoranging(bool keep_divs, bool force_update)
 642 {
 643         const deque< shared_ptr<pv::data::AnalogSegment> > &segments =
 644                 base_->analog_data()->analog_segments();
 645
 646         if (segments.empty())
 647                 return;
 648
 649         static double prev_min = 0, prev_max = 0;
 650         double min = 0, max = 0;
 651
 652         for (shared_ptr<pv::data::AnalogSegment> segment : segments) {
 653                 pair<double, double> mm = segment->get_min_max();
 654                 min = std::min(min, mm.first);
 655                 max = std::max(max, mm.second);
 656         }
 657
 658         if ((min == prev_min) && (max == prev_max) && !force_update)
 659                 return;
 660
 661         prev_min = min;
 662         prev_max = max;
 663
 664         // If we're allowed to alter the div assignment...
 665         if (!keep_divs) {
 666                 // Use all divs for the positive range if there are no negative values
 667                 if ((min == 0) && (neg_vdivs_ > 0)) {
 668                         pos_vdivs_ += neg_vdivs_;
 669                         neg_vdivs_ = 0;
 670                 }
 671
 672                 // Split up the divs if there are negative values but no negative divs
 673                 if ((min < 0) && (neg_vdivs_ == 0)) {
 674                         neg_vdivs_ = pos_vdivs_ / 2;
 675                         pos_vdivs_ -= neg_vdivs_;
 676                 }
 677         }
 678
 679         // If there is still no positive div when we need it, add one
 680         // (this can happen when pos_vdivs==neg_vdivs==0)
 681         if ((max > 0) && (pos_vdivs_ == 0)) {
 682                 pos_vdivs_ = 1;
 683                 owner_->extents_changed(false, true);
 684         }
 685
 686         // If there is still no negative div when we need it, add one
 687         // (this can happen when pos_vdivs was 0 or 1 when trying to split)
 688         if ((min < 0) && (neg_vdivs_ == 0)) {
 689                 neg_vdivs_ = 1;
 690                 owner_->extents_changed(false, true);
 691         }
 692
 693         double min_value_per_div;
 694         if ((pos_vdivs_ > 0) && (neg_vdivs_ >  0))
 695                 min_value_per_div = std::max(max / pos_vdivs_, -min / neg_vdivs_);
 696         else if (pos_vdivs_ > 0)
 697                 min_value_per_div = max / pos_vdivs_;
 698         else
 699                 min_value_per_div = -min / neg_vdivs_;
 700
 701         // Find first scale value that is bigger than the value we need
 702         for (int i = MinScaleIndex; i < MaxScaleIndex; i++)
 703                 if (get_resolution(i) > min_value_per_div) {
 704                         scale_index_ = i;
 705                         break;
 706                 }
 707
 708         update_scale();
 709 }
 710
 711 void AnalogSignal::populate_popup_form(QWidget *parent, QFormLayout *form)
 712 {
 713         // Add the standard options
 714         Signal::populate_popup_form(parent, form);
 715
 716         QFormLayout *const layout = new QFormLayout;
 717
 718         // Add div-related settings
 719         pvdiv_sb_ = new QSpinBox(parent);
 720         pvdiv_sb_->setRange(0, MaximumVDivs);
 721         pvdiv_sb_->setValue(pos_vdivs_);
 722         connect(pvdiv_sb_, SIGNAL(valueChanged(int)),
 723                 this, SLOT(on_pos_vdivs_changed(int)));
 724         layout->addRow(tr("Number of pos vertical divs"), pvdiv_sb_);
 725
 726         nvdiv_sb_ = new QSpinBox(parent);
 727         nvdiv_sb_->setRange(0, MaximumVDivs);
 728         nvdiv_sb_->setValue(neg_vdivs_);
 729         connect(nvdiv_sb_, SIGNAL(valueChanged(int)),
 730                 this, SLOT(on_neg_vdivs_changed(int)));
 731         layout->addRow(tr("Number of neg vertical divs"), nvdiv_sb_);
 732
 733         div_height_sb_ = new QSpinBox(parent);
 734         div_height_sb_->setRange(20, 1000);
 735         div_height_sb_->setSingleStep(5);
 736         div_height_sb_->setSuffix(tr(" pixels"));
 737         div_height_sb_->setValue(div_height_);
 738         connect(div_height_sb_, SIGNAL(valueChanged(int)),
 739                 this, SLOT(on_div_height_changed(int)));
 740         layout->addRow(tr("Div height"), div_height_sb_);
 741
 742         // Add the vertical resolution
 743         resolution_cb_ = new QComboBox(parent);
 744
 745         for (int i = MinScaleIndex; i < MaxScaleIndex; i++) {
 746                 const QString label = QString("%1").arg(get_resolution(i));
 747                 resolution_cb_->insertItem(0, label, QVariant(i));
 748         }
 749
 750         int cur_idx = resolution_cb_->findData(QVariant(scale_index_));
 751         resolution_cb_->setCurrentIndex(cur_idx);
 752
 753         connect(resolution_cb_, SIGNAL(currentIndexChanged(int)),
 754                 this, SLOT(on_resolution_changed(int)));
 755
 756         QGridLayout *const vdiv_layout = new QGridLayout;
 757         QLabel *const vdiv_unit = new QLabel(tr("V/div"));
 758         vdiv_layout->addWidget(resolution_cb_, 0, 0);
 759         vdiv_layout->addWidget(vdiv_unit, 0, 1);
 760
 761         layout->addRow(tr("Vertical resolution"), vdiv_layout);
 762
 763         // Add the autoranging checkbox
 764         QCheckBox* autoranging_cb = new QCheckBox();
 765         autoranging_cb->setCheckState(autoranging_ ? Qt::Checked : Qt::Unchecked);
 766
 767         connect(autoranging_cb, SIGNAL(stateChanged(int)),
 768                 this, SLOT(on_autoranging_changed(int)));
 769
 770         layout->addRow(tr("Autoranging"), autoranging_cb);
 771
 772         // Add the conversion type dropdown
 773         conversion_cb_ = new QComboBox();
 774
 775         conversion_cb_->addItem(tr("none"),
 776                 SignalBase::NoConversion);
 777         conversion_cb_->addItem(tr("to logic via threshold"),
 778                 SignalBase::A2LConversionByTreshold);
 779         conversion_cb_->addItem(tr("to logic via schmitt-trigger"),
 780                 SignalBase::A2LConversionBySchmittTrigger);
 781
 782         cur_idx = conversion_cb_->findData(QVariant(base_->get_conversion_type()));
 783         conversion_cb_->setCurrentIndex(cur_idx);
 784
 785         layout->addRow(tr("Conversion"), conversion_cb_);
 786
 787         connect(conversion_cb_, SIGNAL(currentIndexChanged(int)),
 788                 this, SLOT(on_conversion_changed(int)));
 789
 790     // Add the conversion threshold settings
 791     conv_threshold_cb_ = new QComboBox();
 792     conv_threshold_cb_->setEditable(true);
 793
 794     layout->addRow(tr("Conversion threshold(s)"), conv_threshold_cb_);
 795
 796     connect(conv_threshold_cb_, SIGNAL(currentIndexChanged(int)),
 797             this, SLOT(on_conv_threshold_changed(int)));
 798     connect(conv_threshold_cb_, SIGNAL(editTextChanged(const QString)),
 799             this, SLOT(on_conv_threshold_changed()));  // index will be -1
 800
 801         // Add the display type dropdown
 802         display_type_cb_ = new QComboBox();
 803
 804         display_type_cb_->addItem(tr("analog"), DisplayAnalog);
 805         display_type_cb_->addItem(tr("converted"), DisplayConverted);
 806         display_type_cb_->addItem(tr("analog+converted"), DisplayBoth);
 807
 808         cur_idx = display_type_cb_->findData(QVariant(display_type_));
 809         display_type_cb_->setCurrentIndex(cur_idx);
 810
 811         layout->addRow(tr("Show traces for"), display_type_cb_);
 812
 813         connect(display_type_cb_, SIGNAL(currentIndexChanged(int)),
 814                 this, SLOT(on_display_type_changed(int)));
 815
 816         // Update the conversion widget contents and states
 817         update_conversion_widgets();
 818
 819         form->addRow(layout);
 820 }
 821
 822 void AnalogSignal::on_samples_added()
 823 {
 824         perform_autoranging(false, false);
 825 }
 826
 827 void AnalogSignal::on_pos_vdivs_changed(int vdivs)
 828 {
 829         if (vdivs == pos_vdivs_)
 830                 return;
 831
 832         pos_vdivs_ = vdivs;
 833
 834         // There has to be at least one div, positive or negative
 835         if ((neg_vdivs_ == 0) && (pos_vdivs_ == 0)) {
 836                 pos_vdivs_ = 1;
 837                 if (pvdiv_sb_)
 838                         pvdiv_sb_->setValue(pos_vdivs_);
 839         }
 840
 841         if (autoranging_) {
 842                 perform_autoranging(true, true);
 843
 844                 // It could be that a positive or negative div was added, so update
 845                 if (pvdiv_sb_) {
 846                         pvdiv_sb_->setValue(pos_vdivs_);
 847                         nvdiv_sb_->setValue(neg_vdivs_);
 848                 }
 849         }
 850
 851         if (owner_) {
 852                 // Call order is important, otherwise the lazy event handler won't work
 853                 owner_->extents_changed(false, true);
 854                 owner_->row_item_appearance_changed(false, true);
 855         }
 856 }
 857
 858 void AnalogSignal::on_neg_vdivs_changed(int vdivs)
 859 {
 860         if (vdivs == neg_vdivs_)
 861                 return;
 862
 863         neg_vdivs_ = vdivs;
 864
 865         // There has to be at least one div, positive or negative
 866         if ((neg_vdivs_ == 0) && (pos_vdivs_ == 0)) {
 867                 pos_vdivs_ = 1;
 868                 if (pvdiv_sb_)
 869                         pvdiv_sb_->setValue(pos_vdivs_);
 870         }
 871
 872         if (autoranging_) {
 873                 perform_autoranging(true, true);
 874
 875                 // It could be that a positive or negative div was added, so update
 876                 if (pvdiv_sb_) {
 877                         pvdiv_sb_->setValue(pos_vdivs_);
 878                         nvdiv_sb_->setValue(neg_vdivs_);
 879                 }
 880         }
 881
 882         if (owner_) {
 883                 // Call order is important, otherwise the lazy event handler won't work
 884                 owner_->extents_changed(false, true);
 885                 owner_->row_item_appearance_changed(false, true);
 886         }
 887 }
 888
 889 void AnalogSignal::on_div_height_changed(int height)
 890 {
 891         div_height_ = height;
 892         update_scale();
 893
 894         if (owner_) {
 895                 // Call order is important, otherwise the lazy event handler won't work
 896                 owner_->extents_changed(false, true);
 897                 owner_->row_item_appearance_changed(false, true);
 898         }
 899 }
 900
 901 void AnalogSignal::on_resolution_changed(int index)
 902 {
 903         scale_index_ = resolution_cb_->itemData(index).toInt();
 904         update_scale();
 905
 906         if (owner_)
 907                 owner_->row_item_appearance_changed(false, true);
 908 }
 909
 910 void AnalogSignal::on_autoranging_changed(int state)
 911 {
 912         autoranging_ = (state == Qt::Checked);
 913
 914         if (autoranging_)
 915                 perform_autoranging(false, true);
 916
 917         if (owner_) {
 918                 // Call order is important, otherwise the lazy event handler won't work
 919                 owner_->extents_changed(false, true);
 920                 owner_->row_item_appearance_changed(false, true);
 921         }
 922 }
 923
 924 void AnalogSignal::on_conversion_changed(int index)
 925 {
 926         SignalBase::ConversionType old_conv_type = base_->get_conversion_type();
 927
 928         SignalBase::ConversionType conv_type =
 929                 (SignalBase::ConversionType)(conversion_cb_->itemData(index).toInt());
 930
 931         if (conv_type != old_conv_type) {
 932                 base_->set_conversion_type(conv_type);
 933                 update_conversion_widgets();
 934
 935                 if (owner_)
 936                         owner_->row_item_appearance_changed(false, true);
 937         }
 938 }
 939
 940 void AnalogSignal::on_conv_threshold_changed(int index)
 941 {
 942         SignalBase::ConversionType conv_type = base_->get_conversion_type();
 943
 944         // Note: index is set to -1 if the text in the combo box matches none of
 945         // the entries in the combo box
 946
 947         if ((index == -1) && (conv_threshold_cb_->currentText().length() == 0))
 948                 return;
 949
 950         // The combo box entry with the custom value has user_data set to -1
 951         const int user_data = conv_threshold_cb_->findText(
 952                         conv_threshold_cb_->currentText());
 953
 954         const bool use_custom_thr = (index == -1) || (user_data == -1);
 955
 956         if (conv_type == SignalBase::A2LConversionByTreshold && use_custom_thr) {
 957                 // Not one of the preset values, try to parse the combo box text
 958                 // Note: Regex loosely based on
 959                 // https://txt2re.com/index-c++.php3?s=0.1V&1&-13
 960                 QString re1 = "([+-]?\\d*[\\.,]?\\d*)"; // Float value
 961                 QString re2 = "([a-zA-Z]*)"; // SI unit
 962                 QRegExp regex(re1 + re2);
 963
 964                 const QString text = conv_threshold_cb_->currentText();
 965                 if (!regex.exactMatch(text))
 966                         return;  // String doesn't match the regex
 967
 968                 QStringList tokens = regex.capturedTexts();
 969
 970                 // For now, we simply assume that the unit is volt without modifiers
 971                 const double thr = tokens.at(1).toDouble();
 972
 973                 // Only restart the conversion if the threshold was updated
 974                 if (base_->set_conversion_option("threshold_value", thr))
 975                         delayed_conversion_starter_.start();
 976         }
 977
 978         if (conv_type == SignalBase::A2LConversionBySchmittTrigger && use_custom_thr) {
 979                 // Not one of the preset values, try to parse the combo box text
 980                 // Note: Regex loosely based on
 981                 // https://txt2re.com/index-c++.php3?s=0.1V/0.2V&2&14&-22&3&15
 982                 QString re1 = "([+-]?\\d*[\\.,]?\\d*)"; // Float value
 983                 QString re2 = "([a-zA-Z]*)"; // SI unit
 984                 QString re3 = "\\/"; // Forward slash, not captured
 985                 QString re4 = "([+-]?\\d*[\\.,]?\\d*)"; // Float value
 986                 QString re5 = "([a-zA-Z]*)"; // SI unit
 987                 QRegExp regex(re1 + re2 + re3 + re4 + re5);
 988
 989                 const QString text = conv_threshold_cb_->currentText();
 990                 if (!regex.exactMatch(text))
 991                         return;  // String doesn't match the regex
 992
 993                 QStringList tokens = regex.capturedTexts();
 994
 995                 // For now, we simply assume that the unit is volt without modifiers
 996                 const double low_thr = tokens.at(1).toDouble();
 997                 const double high_thr = tokens.at(3).toDouble();
 998
 999                 // Only restart the conversion if one of the options was updated
1000                 bool o1 = base_->set_conversion_option("threshold_value_low", low_thr);
1001                 bool o2 = base_->set_conversion_option("threshold_value_high", high_thr);
1002                 if (o1 || o2)
1003                         delayed_conversion_starter_.start();
1004         }
1005
1006         base_->set_conversion_preset(index);
1007
1008         // Immediately start the conversion if we're not asking for a delayed reaction
1009         if (!delayed_conversion_starter_.isActive())
1010                 base_->start_conversion();
1011 }
1012
1013 void AnalogSignal::on_delayed_conversion_starter()
1014 {
1015         base_->start_conversion();
1016 }
1017
1018 void AnalogSignal::on_display_type_changed(int index)
1019 {
1020         display_type_ = (DisplayType)(display_type_cb_->itemData(index).toInt());
1021
1022         if (owner_)
1023                 owner_->row_item_appearance_changed(false, true);
1024 }
1025
1026 } // namespace trace
1027 } // namespace views
1028 } // namespace pv