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 namespace pv {
  61 namespace views {
  62 namespace trace {
  63
  64 const QColor AnalogSignal::SignalColours[4] = {
  65         QColor(0xC4, 0xA0, 0x00),       // Yellow
  66         QColor(0x87, 0x20, 0x7A),       // Magenta
  67         QColor(0x20, 0x4A, 0x87),       // Blue
  68         QColor(0x4E, 0x9A, 0x06)        // Green
  69 };
  70
  71 const QColor AnalogSignal::GridMajorColor = QColor(0, 0, 0, 40 * 256 / 100);
  72 const QColor AnalogSignal::GridMinorColor = QColor(0, 0, 0, 20 * 256 / 100);
  73
  74 const QColor AnalogSignal::SamplingPointColour(0x77, 0x77, 0x77);
  75
  76 const int64_t AnalogSignal::TracePaintBlockSize = 1024 * 1024;  // 4 MiB (due to float)
  77 const float AnalogSignal::EnvelopeThreshold = 64.0f;
  78
  79 const int AnalogSignal::MaximumVDivs = 10;
  80 const int AnalogSignal::MinScaleIndex = -6;
  81 const int AnalogSignal::MaxScaleIndex = 7;
  82
  83 const int AnalogSignal::InfoTextMarginRight = 20;
  84 const int AnalogSignal::InfoTextMarginBottom = 5;
  85
  86 AnalogSignal::AnalogSignal(
  87         pv::Session &session,
  88         shared_ptr<data::SignalBase> base) :
  89         Signal(session, base),
  90         scale_index_(4), // 20 per div
  91         scale_index_drag_offset_(0),
  92         pos_vdivs_(1),
  93         neg_vdivs_(1),
  94         resolution_(0),
  95         display_type_(DisplayBoth),
  96         autoranging_(true)
  97 {
  98         pv::data::Analog* analog_data =
  99                 dynamic_cast<pv::data::Analog*>(data().get());
 100
 101         connect(analog_data, SIGNAL(samples_added(QObject*, uint64_t, uint64_t)),
 102                 this, SLOT(on_samples_added()));
 103
 104         connect(&delayed_conversion_starter_, SIGNAL(timeout()),
 105                 this, SLOT(on_delayed_conversion_starter()));
 106         delayed_conversion_starter_.setSingleShot(true);
 107         delayed_conversion_starter_.setInterval(1000);  // 1s timeout
 108
 109         GlobalSettings gs;
 110         div_height_ = gs.value(GlobalSettings::Key_View_DefaultDivHeight).toInt();
 111
 112         base_->set_colour(SignalColours[base_->index() % countof(SignalColours)]);
 113         update_scale();
 114 }
 115
 116 shared_ptr<pv::data::SignalData> AnalogSignal::data() const
 117 {
 118         return base_->analog_data();
 119 }
 120
 121 void AnalogSignal::save_settings(QSettings &settings) const
 122 {
 123         settings.setValue("pos_vdivs", pos_vdivs_);
 124         settings.setValue("neg_vdivs", neg_vdivs_);
 125         settings.setValue("scale_index", scale_index_);
 126         settings.setValue("display_type", display_type_);
 127         settings.setValue("autoranging", autoranging_);
 128         settings.setValue("div_height", div_height_);
 129 }
 130
 131 void AnalogSignal::restore_settings(QSettings &settings)
 132 {
 133         if (settings.contains("pos_vdivs"))
 134                 pos_vdivs_ = settings.value("pos_vdivs").toInt();
 135
 136         if (settings.contains("neg_vdivs"))
 137                 neg_vdivs_ = settings.value("neg_vdivs").toInt();
 138
 139         if (settings.contains("scale_index")) {
 140                 scale_index_ = settings.value("scale_index").toInt();
 141                 update_scale();
 142         }
 143
 144         if (settings.contains("display_type"))
 145                 display_type_ = (DisplayType)(settings.value("display_type").toInt());
 146
 147         if (settings.contains("autoranging"))
 148                 autoranging_ = settings.value("autoranging").toBool();
 149
 150         if (settings.contains("div_height")) {
 151                 const int old_height = div_height_;
 152                 div_height_ = settings.value("div_height").toInt();
 153
 154                 if ((div_height_ != old_height) && owner_) {
 155                         // Call order is important, otherwise the lazy event handler won't work
 156                         owner_->extents_changed(false, true);
 157                         owner_->row_item_appearance_changed(false, true);
 158                 }
 159         }
 160 }
 161
 162 pair<int, int> AnalogSignal::v_extents() const
 163 {
 164         const int ph = pos_vdivs_ * div_height_;
 165         const int nh = neg_vdivs_ * div_height_;
 166         return make_pair(-ph, nh);
 167 }
 168
 169 int AnalogSignal::scale_handle_offset() const
 170 {
 171         const int h = (pos_vdivs_ + neg_vdivs_) * div_height_;
 172
 173         return ((scale_index_drag_offset_ - scale_index_) * h / 4) - h / 2;
 174 }
 175
 176 void AnalogSignal::scale_handle_dragged(int offset)
 177 {
 178         const int h = (pos_vdivs_ + neg_vdivs_) * div_height_;
 179
 180         scale_index_ = scale_index_drag_offset_ - (offset + h / 2) / (h / 4);
 181
 182         update_scale();
 183 }
 184
 185 void AnalogSignal::scale_handle_drag_release()
 186 {
 187         scale_index_drag_offset_ = scale_index_;
 188         update_scale();
 189 }
 190
 191 void AnalogSignal::paint_back(QPainter &p, ViewItemPaintParams &pp)
 192 {
 193         if (base_->enabled()) {
 194                 Trace::paint_back(p, pp);
 195                 paint_axis(p, pp, get_visual_y());
 196         }
 197 }
 198
 199 void AnalogSignal::paint_mid(QPainter &p, ViewItemPaintParams &pp)
 200 {
 201         assert(base_->analog_data());
 202         assert(owner_);
 203
 204         const int y = get_visual_y();
 205
 206         if (!base_->enabled())
 207                 return;
 208
 209         if ((display_type_ == DisplayAnalog) || (display_type_ == DisplayBoth)) {
 210                 paint_grid(p, y, pp.left(), pp.right());
 211
 212                 const deque< shared_ptr<pv::data::AnalogSegment> > &segments =
 213                         base_->analog_data()->analog_segments();
 214                 if (segments.empty())
 215                         return;
 216
 217                 const shared_ptr<pv::data::AnalogSegment> &segment =
 218                         segments.front();
 219
 220                 const double pixels_offset = pp.pixels_offset();
 221                 const double samplerate = max(1.0, segment->samplerate());
 222                 const pv::util::Timestamp& start_time = segment->start_time();
 223                 const int64_t last_sample = segment->get_sample_count() - 1;
 224                 const double samples_per_pixel = samplerate * pp.scale();
 225                 const pv::util::Timestamp start = samplerate * (pp.offset() - start_time);
 226                 const pv::util::Timestamp end = start + samples_per_pixel * pp.width();
 227
 228                 const int64_t start_sample = min(max(floor(start).convert_to<int64_t>(),
 229                         (int64_t)0), last_sample);
 230                 const int64_t end_sample = min(max((ceil(end) + 1).convert_to<int64_t>(),
 231                         (int64_t)0), last_sample);
 232
 233                 if (samples_per_pixel < EnvelopeThreshold)
 234                         paint_trace(p, segment, y, pp.left(),
 235                                 start_sample, end_sample,
 236                                 pixels_offset, samples_per_pixel);
 237                 else
 238                         paint_envelope(p, segment, y, pp.left(),
 239                                 start_sample, end_sample,
 240                                 pixels_offset, samples_per_pixel);
 241         }
 242
 243         if ((display_type_ == DisplayConverted) || (display_type_ == DisplayBoth)) {
 244                 const data::SignalBase::ConversionType conv_type =
 245                         base_->get_conversion_type();
 246
 247                 if (((conv_type == data::SignalBase::A2LConversionByTreshold) ||
 248                         (conv_type == data::SignalBase::A2LConversionBySchmittTrigger))) {
 249
 250                         paint_logic_mid(p, pp);
 251                 }
 252         }
 253 }
 254
 255 void AnalogSignal::paint_fore(QPainter &p, ViewItemPaintParams &pp)
 256 {
 257         if (!enabled())
 258                 return;
 259
 260         if ((display_type_ == DisplayAnalog) || (display_type_ == DisplayBoth)) {
 261                 const int y = get_visual_y();
 262
 263                 // Show the info section on the right side of the trace
 264                 const QString infotext = QString("%1 V/div").arg(resolution_);
 265
 266                 p.setPen(base_->colour());
 267                 p.setFont(QApplication::font());
 268
 269                 const QRectF bounding_rect = QRectF(pp.left(),
 270                                 y + v_extents().first,
 271                                 pp.width() - InfoTextMarginRight,
 272                                 v_extents().second - v_extents().first - InfoTextMarginBottom);
 273
 274                 p.drawText(bounding_rect, Qt::AlignRight | Qt::AlignBottom, infotext);
 275         }
 276 }
 277
 278 void AnalogSignal::paint_grid(QPainter &p, int y, int left, int right)
 279 {
 280         p.setRenderHint(QPainter::Antialiasing, false);
 281
 282         GlobalSettings settings;
 283         const bool show_analog_minor_grid =
 284                 settings.value(GlobalSettings::Key_View_ShowAnalogMinorGrid).toBool();
 285
 286         if (pos_vdivs_ > 0) {
 287                 p.setPen(QPen(GridMajorColor, 1, Qt::DashLine));
 288                 for (int i = 1; i <= pos_vdivs_; i++) {
 289                         const float dy = i * div_height_;
 290                         p.drawLine(QLineF(left, y - dy, right, y - dy));
 291                 }
 292         }
 293
 294         if ((pos_vdivs_ > 0) && show_analog_minor_grid) {
 295                 p.setPen(QPen(GridMinorColor, 1, Qt::DashLine));
 296                 for (int i = 0; i < pos_vdivs_; i++) {
 297                         const float dy = i * div_height_;
 298                         const float dy25 = dy + (0.25 * div_height_);
 299                         const float dy50 = dy + (0.50 * div_height_);
 300                         const float dy75 = dy + (0.75 * div_height_);
 301                         p.drawLine(QLineF(left, y - dy25, right, y - dy25));
 302                         p.drawLine(QLineF(left, y - dy50, right, y - dy50));
 303                         p.drawLine(QLineF(left, y - dy75, right, y - dy75));
 304                 }
 305         }
 306
 307         if (neg_vdivs_ > 0) {
 308                 p.setPen(QPen(GridMajorColor, 1, Qt::DashLine));
 309                 for (int i = 1; i <= neg_vdivs_; i++) {
 310                         const float dy = i * div_height_;
 311                         p.drawLine(QLineF(left, y + dy, right, y + dy));
 312                 }
 313         }
 314
 315         if ((pos_vdivs_ > 0) && show_analog_minor_grid) {
 316                 p.setPen(QPen(GridMinorColor, 1, Qt::DashLine));
 317                 for (int i = 0; i < neg_vdivs_; i++) {
 318                         const float dy = i * div_height_;
 319                         const float dy25 = dy + (0.25 * div_height_);
 320                         const float dy50 = dy + (0.50 * div_height_);
 321                         const float dy75 = dy + (0.75 * div_height_);
 322                         p.drawLine(QLineF(left, y + dy25, right, y + dy25));
 323                         p.drawLine(QLineF(left, y + dy50, right, y + dy50));
 324                         p.drawLine(QLineF(left, y + dy75, right, y + dy75));
 325                 }
 326         }
 327
 328         p.setRenderHint(QPainter::Antialiasing, true);
 329 }
 330
 331 void AnalogSignal::paint_trace(QPainter &p,
 332         const shared_ptr<pv::data::AnalogSegment> &segment,
 333         int y, int left, const int64_t start, const int64_t end,
 334         const double pixels_offset, const double samples_per_pixel)
 335 {
 336         if (end <= start)
 337                 return;
 338
 339         // Calculate and paint the sampling points if enabled and useful
 340         GlobalSettings settings;
 341         const bool show_sampling_points =
 342                 settings.value(GlobalSettings::Key_View_ShowSamplingPoints).toBool() &&
 343                 (samples_per_pixel < 0.25);
 344
 345         p.setPen(base_->colour());
 346
 347         const int64_t points_count = end - start;
 348
 349         QPointF *points = new QPointF[points_count];
 350         QPointF *point = points;
 351
 352         QRectF *sampling_points = nullptr;
 353         if (show_sampling_points)
 354                  sampling_points = new QRectF[points_count];
 355         QRectF *sampling_point = sampling_points;
 356
 357         int64_t sample_count = min(points_count, TracePaintBlockSize);
 358         int64_t block_sample = 0;
 359         float *sample_block = new float[TracePaintBlockSize];
 360         segment->get_samples(start, start + sample_count, sample_block);
 361
 362         const int w = 2;
 363         for (int64_t sample = start; sample != end; sample++, block_sample++) {
 364
 365                 if (block_sample == TracePaintBlockSize) {
 366                         block_sample = 0;
 367                         sample_count = min(points_count - sample, TracePaintBlockSize);
 368                         segment->get_samples(sample, sample + sample_count, sample_block);
 369                 }
 370
 371                 const float x = (sample / samples_per_pixel -
 372                         pixels_offset) + left;
 373
 374                 *point++ = QPointF(x, y - sample_block[block_sample] * scale_);
 375
 376                 if (show_sampling_points)
 377                         *sampling_point++ =
 378                                 QRectF(x - (w / 2), y - sample_block[block_sample] * scale_ - (w / 2), w, w);
 379         }
 380         delete[] sample_block;
 381
 382         p.drawPolyline(points, points_count);
 383
 384         if (show_sampling_points) {
 385                 p.setPen(SamplingPointColour);
 386                 p.drawRects(sampling_points, points_count);
 387                 delete[] sampling_points;
 388         }
 389
 390         delete[] points;
 391 }
 392
 393 void AnalogSignal::paint_envelope(QPainter &p,
 394         const shared_ptr<pv::data::AnalogSegment> &segment,
 395         int y, int left, const int64_t start, const int64_t end,
 396         const double pixels_offset, const double samples_per_pixel)
 397 {
 398         using pv::data::AnalogSegment;
 399
 400         AnalogSegment::EnvelopeSection e;
 401         segment->get_envelope_section(e, start, end, samples_per_pixel);
 402
 403         if (e.length < 2)
 404                 return;
 405
 406         p.setPen(QPen(Qt::NoPen));
 407         p.setBrush(base_->colour());
 408
 409         QRectF *const rects = new QRectF[e.length];
 410         QRectF *rect = rects;
 411
 412         for (uint64_t sample = 0; sample < e.length - 1; sample++) {
 413                 const float x = ((e.scale * sample + e.start) /
 414                         samples_per_pixel - pixels_offset) + left;
 415                 const AnalogSegment::EnvelopeSample *const s =
 416                         e.samples + sample;
 417
 418                 // We overlap this sample with the next so that vertical
 419                 // gaps do not appear during steep rising or falling edges
 420                 const float b = y - max(s->max, (s + 1)->min) * scale_;
 421                 const float t = y - min(s->min, (s + 1)->max) * scale_;
 422
 423                 float h = b - t;
 424                 if (h >= 0.0f && h <= 1.0f)
 425                         h = 1.0f;
 426                 if (h <= 0.0f && h >= -1.0f)
 427                         h = -1.0f;
 428
 429                 *rect++ = QRectF(x, t, 1.0f, h);
 430         }
 431
 432         p.drawRects(rects, e.length);
 433
 434         delete[] rects;
 435         delete[] e.samples;
 436 }
 437
 438 void AnalogSignal::paint_logic_mid(QPainter &p, ViewItemPaintParams &pp)
 439 {
 440         QLineF *line;
 441
 442         vector< pair<int64_t, bool> > edges;
 443
 444         assert(base_);
 445
 446         const int y = get_visual_y();
 447
 448         if (!base_->enabled() || !base_->logic_data())
 449                 return;
 450
 451         const int signal_margin =
 452                 QFontMetrics(QApplication::font()).height() / 2;
 453
 454         const int ph = min(pos_vdivs_, 1) * div_height_;
 455         const int nh = min(neg_vdivs_, 1) * div_height_;
 456         const float high_offset = y - ph + signal_margin + 0.5f;
 457         const float low_offset = y + nh - signal_margin - 0.5f;
 458
 459         const deque< shared_ptr<pv::data::LogicSegment> > &segments =
 460                 base_->logic_data()->logic_segments();
 461
 462         if (segments.empty())
 463                 return;
 464
 465         const shared_ptr<pv::data::LogicSegment> &segment =
 466                 segments.front();
 467
 468         double samplerate = segment->samplerate();
 469
 470         // Show sample rate as 1Hz when it is unknown
 471         if (samplerate == 0.0)
 472                 samplerate = 1.0;
 473
 474         const double pixels_offset = pp.pixels_offset();
 475         const pv::util::Timestamp& start_time = segment->start_time();
 476         const int64_t last_sample = segment->get_sample_count() - 1;
 477         const double samples_per_pixel = samplerate * pp.scale();
 478         const double pixels_per_sample = 1 / samples_per_pixel;
 479         const pv::util::Timestamp start = samplerate * (pp.offset() - start_time);
 480         const pv::util::Timestamp end = start + samples_per_pixel * pp.width();
 481
 482         const int64_t start_sample = min(max(floor(start).convert_to<int64_t>(),
 483                 (int64_t)0), last_sample);
 484         const uint64_t end_sample = min(max(ceil(end).convert_to<int64_t>(),
 485                 (int64_t)0), last_sample);
 486
 487         segment->get_subsampled_edges(edges, start_sample, end_sample,
 488                 samples_per_pixel / LogicSignal::Oversampling, 0);
 489         assert(edges.size() >= 2);
 490
 491         // Check whether we need to paint the sampling points
 492         GlobalSettings settings;
 493         const bool show_sampling_points =
 494                 settings.value(GlobalSettings::Key_View_ShowSamplingPoints).toBool() &&
 495                 (samples_per_pixel < 0.25);
 496
 497         vector<QRectF> sampling_points;
 498         float sampling_point_x = 0.0f;
 499         int64_t sampling_point_sample = start_sample;
 500         const int w = 2;
 501
 502         if (show_sampling_points) {
 503                 sampling_points.reserve(end_sample - start_sample + 1);
 504                 sampling_point_x = (edges.cbegin()->first / samples_per_pixel - pixels_offset) + pp.left();
 505         }
 506
 507         // Paint the edges
 508         const unsigned int edge_count = edges.size() - 2;
 509         QLineF *const edge_lines = new QLineF[edge_count];
 510         line = edge_lines;
 511
 512         for (auto i = edges.cbegin() + 1; i != edges.cend() - 1; i++) {
 513                 const float x = ((*i).first / samples_per_pixel -
 514                         pixels_offset) + pp.left();
 515                 *line++ = QLineF(x, high_offset, x, low_offset);
 516
 517                 if (show_sampling_points)
 518                         while (sampling_point_sample < (*i).first) {
 519                                 const float y = (*i).second ? low_offset : high_offset;
 520                                 sampling_points.emplace_back(
 521                                         QRectF(sampling_point_x - (w / 2), y - (w / 2), w, w));
 522                                 sampling_point_sample++;
 523                                 sampling_point_x += pixels_per_sample;
 524                         };
 525         }
 526
 527         // Calculate the sample points from the last edge to the end of the trace
 528         if (show_sampling_points)
 529                 while ((uint64_t)sampling_point_sample <= end_sample) {
 530                         // Signal changed after the last edge, so the level is inverted
 531                         const float y = (edges.cend() - 1)->second ? high_offset : low_offset;
 532                         sampling_points.emplace_back(
 533                                 QRectF(sampling_point_x - (w / 2), y - (w / 2), w, w));
 534                         sampling_point_sample++;
 535                         sampling_point_x += pixels_per_sample;
 536                 };
 537
 538         p.setPen(LogicSignal::EdgeColour);
 539         p.drawLines(edge_lines, edge_count);
 540         delete[] edge_lines;
 541
 542         // Paint the caps
 543         const unsigned int max_cap_line_count = edges.size();
 544         QLineF *const cap_lines = new QLineF[max_cap_line_count];
 545
 546         p.setPen(LogicSignal::HighColour);
 547         paint_logic_caps(p, cap_lines, edges, true, samples_per_pixel,
 548                 pixels_offset, pp.left(), high_offset);
 549         p.setPen(LogicSignal::LowColour);
 550         paint_logic_caps(p, cap_lines, edges, false, samples_per_pixel,
 551                 pixels_offset, pp.left(), low_offset);
 552
 553         delete[] cap_lines;
 554
 555         // Paint the sampling points
 556         if (show_sampling_points) {
 557                 p.setPen(SamplingPointColour);
 558                 p.drawRects(sampling_points.data(), sampling_points.size());
 559         }
 560 }
 561
 562 void AnalogSignal::paint_logic_caps(QPainter &p, QLineF *const lines,
 563         vector< pair<int64_t, bool> > &edges, bool level,
 564         double samples_per_pixel, double pixels_offset, float x_offset,
 565         float y_offset)
 566 {
 567         QLineF *line = lines;
 568
 569         for (auto i = edges.begin(); i != (edges.end() - 1); i++)
 570                 if ((*i).second == level) {
 571                         *line++ = QLineF(
 572                                 ((*i).first / samples_per_pixel -
 573                                         pixels_offset) + x_offset, y_offset,
 574                                 ((*(i+1)).first / samples_per_pixel -
 575                                         pixels_offset) + x_offset, y_offset);
 576                 }
 577
 578         p.drawLines(lines, line - lines);
 579 }
 580
 581 float AnalogSignal::get_resolution(int scale_index)
 582 {
 583         const float seq[] = {1.0f, 2.0f, 5.0f};
 584
 585         const int offset = numeric_limits<int>::max() / (2 * countof(seq));
 586         const div_t d = div((int)(scale_index + countof(seq) * offset),
 587                 countof(seq));
 588
 589         return powf(10.0f, d.quot - offset) * seq[d.rem];
 590 }
 591
 592 void AnalogSignal::update_scale()
 593 {
 594         resolution_ = get_resolution(scale_index_);
 595         scale_ = div_height_ / resolution_;
 596 }
 597
 598 void AnalogSignal::update_conversion_widgets()
 599 {
 600         data::SignalBase::ConversionType conv_type = base_->get_conversion_type();
 601
 602         // Enable or disable widgets depending on conversion state
 603         conv_threshold_cb_->setEnabled(conv_type != data::SignalBase::NoConversion);
 604         display_type_cb_->setEnabled(conv_type != data::SignalBase::NoConversion);
 605
 606         conv_threshold_cb_->clear();
 607
 608         vector < pair<QString, int> > presets = base_->get_conversion_presets();
 609
 610         // Prevent the combo box from firing the "edit text changed" signal
 611         // as that would involuntarily select the first entry
 612         conv_threshold_cb_->blockSignals(true);
 613
 614         // Set available options depending on chosen conversion
 615         for (pair<QString, int> preset : presets)
 616                 conv_threshold_cb_->addItem(preset.first, preset.second);
 617
 618         map < QString, QVariant > options = base_->get_conversion_options();
 619
 620         if (conv_type == data::SignalBase::A2LConversionByTreshold) {
 621                 const vector<double> thresholds = base_->get_conversion_thresholds(
 622                                 data::SignalBase::A2LConversionByTreshold, true);
 623                 conv_threshold_cb_->addItem(
 624                                 QString("%1V").arg(QString::number(thresholds[0], 'f', 1)), -1);
 625         }
 626
 627         if (conv_type == data::SignalBase::A2LConversionBySchmittTrigger) {
 628                 const vector<double> thresholds = base_->get_conversion_thresholds(
 629                                 data::SignalBase::A2LConversionBySchmittTrigger, true);
 630                 conv_threshold_cb_->addItem(QString("%1V/%2V").arg(
 631                                 QString::number(thresholds[0], 'f', 1),
 632                                 QString::number(thresholds[1], 'f', 1)), -1);
 633         }
 634
 635         int preset_id = base_->get_current_conversion_preset();
 636         conv_threshold_cb_->setCurrentIndex(
 637                         conv_threshold_cb_->findData(preset_id));
 638
 639         conv_threshold_cb_->blockSignals(false);
 640 }
 641
 642 void AnalogSignal::perform_autoranging(bool keep_divs, bool force_update)
 643 {
 644         const deque< shared_ptr<pv::data::AnalogSegment> > &segments =
 645                 base_->analog_data()->analog_segments();
 646
 647         if (segments.empty())
 648                 return;
 649
 650         static double prev_min = 0, prev_max = 0;
 651         double min = 0, max = 0;
 652
 653         for (shared_ptr<pv::data::AnalogSegment> segment : segments) {
 654                 pair<double, double> mm = segment->get_min_max();
 655                 min = std::min(min, mm.first);
 656                 max = std::max(max, mm.second);
 657         }
 658
 659         if ((min == prev_min) && (max == prev_max) && !force_update)
 660                 return;
 661
 662         prev_min = min;
 663         prev_max = max;
 664
 665         // If we're allowed to alter the div assignment...
 666         if (!keep_divs) {
 667                 // Use all divs for the positive range if there are no negative values
 668                 if ((min == 0) && (neg_vdivs_ > 0)) {
 669                         pos_vdivs_ += neg_vdivs_;
 670                         neg_vdivs_ = 0;
 671                 }
 672
 673                 // Split up the divs if there are negative values but no negative divs
 674                 if ((min < 0) && (neg_vdivs_ == 0)) {
 675                         neg_vdivs_ = pos_vdivs_ / 2;
 676                         pos_vdivs_ -= neg_vdivs_;
 677                 }
 678         }
 679
 680         // If there is still no positive div when we need it, add one
 681         // (this can happen when pos_vdivs==neg_vdivs==0)
 682         if ((max > 0) && (pos_vdivs_ == 0)) {
 683                 pos_vdivs_ = 1;
 684                 owner_->extents_changed(false, true);
 685         }
 686
 687         // If there is still no negative div when we need it, add one
 688         // (this can happen when pos_vdivs was 0 or 1 when trying to split)
 689         if ((min < 0) && (neg_vdivs_ == 0)) {
 690                 neg_vdivs_ = 1;
 691                 owner_->extents_changed(false, true);
 692         }
 693
 694         double min_value_per_div;
 695         if ((pos_vdivs_ > 0) && (neg_vdivs_ >  0))
 696                 min_value_per_div = std::max(max / pos_vdivs_, -min / neg_vdivs_);
 697         else if (pos_vdivs_ > 0)
 698                 min_value_per_div = max / pos_vdivs_;
 699         else
 700                 min_value_per_div = -min / neg_vdivs_;
 701
 702         // Find first scale value that is bigger than the value we need
 703         for (int i = MinScaleIndex; i < MaxScaleIndex; i++)
 704                 if (get_resolution(i) > min_value_per_div) {
 705                         scale_index_ = i;
 706                         break;
 707                 }
 708
 709         update_scale();
 710 }
 711
 712 void AnalogSignal::populate_popup_form(QWidget *parent, QFormLayout *form)
 713 {
 714         // Add the standard options
 715         Signal::populate_popup_form(parent, form);
 716
 717         QFormLayout *const layout = new QFormLayout;
 718
 719         // Add div-related settings
 720         pvdiv_sb_ = new QSpinBox(parent);
 721         pvdiv_sb_->setRange(0, MaximumVDivs);
 722         pvdiv_sb_->setValue(pos_vdivs_);
 723         connect(pvdiv_sb_, SIGNAL(valueChanged(int)),
 724                 this, SLOT(on_pos_vdivs_changed(int)));
 725         layout->addRow(tr("Number of pos vertical divs"), pvdiv_sb_);
 726
 727         nvdiv_sb_ = new QSpinBox(parent);
 728         nvdiv_sb_->setRange(0, MaximumVDivs);
 729         nvdiv_sb_->setValue(neg_vdivs_);
 730         connect(nvdiv_sb_, SIGNAL(valueChanged(int)),
 731                 this, SLOT(on_neg_vdivs_changed(int)));
 732         layout->addRow(tr("Number of neg vertical divs"), nvdiv_sb_);
 733
 734         div_height_sb_ = new QSpinBox(parent);
 735         div_height_sb_->setRange(20, 1000);
 736         div_height_sb_->setSingleStep(5);
 737         div_height_sb_->setSuffix(tr(" pixels"));
 738         div_height_sb_->setValue(div_height_);
 739         connect(div_height_sb_, SIGNAL(valueChanged(int)),
 740                 this, SLOT(on_div_height_changed(int)));
 741         layout->addRow(tr("Div height"), div_height_sb_);
 742
 743         // Add the vertical resolution
 744         resolution_cb_ = new QComboBox(parent);
 745
 746         for (int i = MinScaleIndex; i < MaxScaleIndex; i++) {
 747                 const QString label = QString("%1").arg(get_resolution(i));
 748                 resolution_cb_->insertItem(0, label, QVariant(i));
 749         }
 750
 751         int cur_idx = resolution_cb_->findData(QVariant(scale_index_));
 752         resolution_cb_->setCurrentIndex(cur_idx);
 753
 754         connect(resolution_cb_, SIGNAL(currentIndexChanged(int)),
 755                 this, SLOT(on_resolution_changed(int)));
 756
 757         QGridLayout *const vdiv_layout = new QGridLayout;
 758         QLabel *const vdiv_unit = new QLabel(tr("V/div"));
 759         vdiv_layout->addWidget(resolution_cb_, 0, 0);
 760         vdiv_layout->addWidget(vdiv_unit, 0, 1);
 761
 762         layout->addRow(tr("Vertical resolution"), vdiv_layout);
 763
 764         // Add the autoranging checkbox
 765         QCheckBox* autoranging_cb = new QCheckBox();
 766         autoranging_cb->setCheckState(autoranging_ ? Qt::Checked : Qt::Unchecked);
 767
 768         connect(autoranging_cb, SIGNAL(stateChanged(int)),
 769                 this, SLOT(on_autoranging_changed(int)));
 770
 771         layout->addRow(tr("Autoranging"), autoranging_cb);
 772
 773         // Add the conversion type dropdown
 774         conversion_cb_ = new QComboBox();
 775
 776         conversion_cb_->addItem("none", data::SignalBase::NoConversion);
 777         conversion_cb_->addItem("to logic via threshold", data::SignalBase::A2LConversionByTreshold);
 778         conversion_cb_->addItem("to logic via schmitt-trigger", data::SignalBase::A2LConversionBySchmittTrigger);
 779
 780         cur_idx = conversion_cb_->findData(QVariant(base_->get_conversion_type()));
 781         conversion_cb_->setCurrentIndex(cur_idx);
 782
 783         layout->addRow(tr("Conversion"), conversion_cb_);
 784
 785         connect(conversion_cb_, SIGNAL(currentIndexChanged(int)),
 786                 this, SLOT(on_conversion_changed(int)));
 787
 788     // Add the conversion threshold settings
 789     conv_threshold_cb_ = new QComboBox();
 790     conv_threshold_cb_->setEditable(true);
 791
 792     layout->addRow(tr("Conversion threshold(s)"), conv_threshold_cb_);
 793
 794     connect(conv_threshold_cb_, SIGNAL(currentIndexChanged(int)),
 795             this, SLOT(on_conv_threshold_changed(int)));
 796     connect(conv_threshold_cb_, SIGNAL(editTextChanged(const QString)),
 797             this, SLOT(on_conv_threshold_changed()));  // index will be -1
 798
 799         // Add the display type dropdown
 800         display_type_cb_ = new QComboBox();
 801
 802         display_type_cb_->addItem(tr("Analog"), DisplayAnalog);
 803         display_type_cb_->addItem(tr("Converted"), DisplayConverted);
 804         display_type_cb_->addItem(tr("Analog+Converted"), DisplayBoth);
 805
 806         cur_idx = display_type_cb_->findData(QVariant(display_type_));
 807         display_type_cb_->setCurrentIndex(cur_idx);
 808
 809         layout->addRow(tr("Traces to show:"), display_type_cb_);
 810
 811         connect(display_type_cb_, SIGNAL(currentIndexChanged(int)),
 812                 this, SLOT(on_display_type_changed(int)));
 813
 814         // Update the conversion widget contents and states
 815         update_conversion_widgets();
 816
 817         form->addRow(layout);
 818 }
 819
 820 void AnalogSignal::on_samples_added()
 821 {
 822         perform_autoranging(false, false);
 823 }
 824
 825 void AnalogSignal::on_pos_vdivs_changed(int vdivs)
 826 {
 827         if (vdivs == pos_vdivs_)
 828                 return;
 829
 830         pos_vdivs_ = vdivs;
 831
 832         // There has to be at least one div, positive or negative
 833         if ((neg_vdivs_ == 0) && (pos_vdivs_ == 0)) {
 834                 pos_vdivs_ = 1;
 835                 if (pvdiv_sb_)
 836                         pvdiv_sb_->setValue(pos_vdivs_);
 837         }
 838
 839         if (autoranging_) {
 840                 perform_autoranging(true, true);
 841
 842                 // It could be that a positive or negative div was added, so update
 843                 if (pvdiv_sb_) {
 844                         pvdiv_sb_->setValue(pos_vdivs_);
 845                         nvdiv_sb_->setValue(neg_vdivs_);
 846                 }
 847         }
 848
 849         if (owner_) {
 850                 // Call order is important, otherwise the lazy event handler won't work
 851                 owner_->extents_changed(false, true);
 852                 owner_->row_item_appearance_changed(false, true);
 853         }
 854 }
 855
 856 void AnalogSignal::on_neg_vdivs_changed(int vdivs)
 857 {
 858         if (vdivs == neg_vdivs_)
 859                 return;
 860
 861         neg_vdivs_ = vdivs;
 862
 863         // There has to be at least one div, positive or negative
 864         if ((neg_vdivs_ == 0) && (pos_vdivs_ == 0)) {
 865                 pos_vdivs_ = 1;
 866                 if (pvdiv_sb_)
 867                         pvdiv_sb_->setValue(pos_vdivs_);
 868         }
 869
 870         if (autoranging_) {
 871                 perform_autoranging(true, true);
 872
 873                 // It could be that a positive or negative div was added, so update
 874                 if (pvdiv_sb_) {
 875                         pvdiv_sb_->setValue(pos_vdivs_);
 876                         nvdiv_sb_->setValue(neg_vdivs_);
 877                 }
 878         }
 879
 880         if (owner_) {
 881                 // Call order is important, otherwise the lazy event handler won't work
 882                 owner_->extents_changed(false, true);
 883                 owner_->row_item_appearance_changed(false, true);
 884         }
 885 }
 886
 887 void AnalogSignal::on_div_height_changed(int height)
 888 {
 889         div_height_ = height;
 890         update_scale();
 891
 892         if (owner_) {
 893                 // Call order is important, otherwise the lazy event handler won't work
 894                 owner_->extents_changed(false, true);
 895                 owner_->row_item_appearance_changed(false, true);
 896         }
 897 }
 898
 899 void AnalogSignal::on_resolution_changed(int index)
 900 {
 901         scale_index_ = resolution_cb_->itemData(index).toInt();
 902         update_scale();
 903
 904         if (owner_)
 905                 owner_->row_item_appearance_changed(false, true);
 906 }
 907
 908 void AnalogSignal::on_autoranging_changed(int state)
 909 {
 910         autoranging_ = (state == Qt::Checked);
 911
 912         if (autoranging_)
 913                 perform_autoranging(false, true);
 914
 915         if (owner_) {
 916                 // Call order is important, otherwise the lazy event handler won't work
 917                 owner_->extents_changed(false, true);
 918                 owner_->row_item_appearance_changed(false, true);
 919         }
 920 }
 921
 922 void AnalogSignal::on_conversion_changed(int index)
 923 {
 924         data::SignalBase::ConversionType old_conv_type =
 925                 base_->get_conversion_type();
 926
 927         data::SignalBase::ConversionType conv_type =
 928                 (data::SignalBase::ConversionType)(conversion_cb_->itemData(index).toInt());
 929
 930         if (conv_type != old_conv_type) {
 931                 base_->set_conversion_type(conv_type);
 932                 update_conversion_widgets();
 933
 934                 if (owner_)
 935                         owner_->row_item_appearance_changed(false, true);
 936         }
 937 }
 938
 939 void AnalogSignal::on_conv_threshold_changed(int index)
 940 {
 941         data::SignalBase::ConversionType conv_type = base_->get_conversion_type();
 942
 943         // Note: index is set to -1 if the text in the combo box matches none of
 944         // the entries in the combo box
 945
 946         if ((index == -1) && (conv_threshold_cb_->currentText().length() == 0))
 947                 return;
 948
 949         // The combo box entry with the custom value has user_data set to -1
 950         const int user_data = conv_threshold_cb_->findText(
 951                         conv_threshold_cb_->currentText());
 952
 953         const bool use_custom_thr = (index == -1) || (user_data == -1);
 954
 955         if (conv_type == data::SignalBase::A2LConversionByTreshold && use_custom_thr) {
 956                 // Not one of the preset values, try to parse the combo box text
 957                 // Note: Regex loosely based on
 958                 // https://txt2re.com/index-c++.php3?s=0.1V&1&-13
 959                 QString re1 = "([+-]?\\d*[\\.,]?\\d*)"; // Float value
 960                 QString re2 = "([a-zA-Z]*)"; // SI unit
 961                 QRegExp regex(re1 + re2);
 962
 963                 const QString text = conv_threshold_cb_->currentText();
 964                 if (!regex.exactMatch(text))
 965                         return;  // String doesn't match the regex
 966
 967                 QStringList tokens = regex.capturedTexts();
 968
 969                 // For now, we simply assume that the unit is volt without modifiers
 970                 const double thr = tokens.at(1).toDouble();
 971
 972                 // Only restart the conversion if the threshold was updated
 973                 if (base_->set_conversion_option("threshold_value", thr))
 974                         delayed_conversion_starter_.start();
 975         }
 976
 977         if (conv_type == data::SignalBase::A2LConversionBySchmittTrigger && use_custom_thr) {
 978                 // Not one of the preset values, try to parse the combo box text
 979                 // Note: Regex loosely based on
 980                 // https://txt2re.com/index-c++.php3?s=0.1V/0.2V&2&14&-22&3&15
 981                 QString re1 = "([+-]?\\d*[\\.,]?\\d*)"; // Float value
 982                 QString re2 = "([a-zA-Z]*)"; // SI unit
 983                 QString re3 = "\\/"; // Forward slash, not captured
 984                 QString re4 = "([+-]?\\d*[\\.,]?\\d*)"; // Float value
 985                 QString re5 = "([a-zA-Z]*)"; // SI unit
 986                 QRegExp regex(re1 + re2 + re3 + re4 + re5);
 987
 988                 const QString text = conv_threshold_cb_->currentText();
 989                 if (!regex.exactMatch(text))
 990                         return;  // String doesn't match the regex
 991
 992                 QStringList tokens = regex.capturedTexts();
 993
 994                 // For now, we simply assume that the unit is volt without modifiers
 995                 const double low_thr = tokens.at(1).toDouble();
 996                 const double high_thr = tokens.at(3).toDouble();
 997
 998                 // Only restart the conversion if one of the options was updated
 999                 bool o1 = base_->set_conversion_option("threshold_value_low", low_thr);
1000                 bool o2 = base_->set_conversion_option("threshold_value_high", high_thr);
1001                 if (o1 || o2)
1002                         delayed_conversion_starter_.start();
1003         }
1004
1005         base_->set_conversion_preset(index);
1006
1007         // Immediately start the conversion if we're not asking for a delayed reaction
1008         if (!delayed_conversion_starter_.isActive())
1009                 base_->start_conversion();
1010 }
1011
1012 void AnalogSignal::on_delayed_conversion_starter()
1013 {
1014         base_->start_conversion();
1015 }
1016
1017 void AnalogSignal::on_display_type_changed(int index)
1018 {
1019         display_type_ = (DisplayType)(display_type_cb_->itemData(index).toInt());
1020
1021         if (owner_)
1022                 owner_->row_item_appearance_changed(false, true);
1023 }
1024
1025 } // namespace trace
1026 } // namespace views
1027 } // namespace pv