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 <QDebug>
  32 #include <QFormLayout>
  33 #include <QGridLayout>
  34 #include <QLabel>
  35 #include <QString>
  36
  37 #include "analogsignal.hpp"
  38 #include "logicsignal.hpp"
  39 #include "view.hpp"
  40
  41 #include "pv/data/analog.hpp"
  42 #include "pv/data/analogsegment.hpp"
  43 #include "pv/data/logic.hpp"
  44 #include "pv/data/logicsegment.hpp"
  45 #include "pv/data/signalbase.hpp"
  46 #include "pv/globalsettings.hpp"
  47
  48 #include <libsigrokcxx/libsigrokcxx.hpp>
  49
  50 using std::bind;
  51 using std::deque;
  52 using std::div;
  53 using std::div_t;
  54 using std::max;
  55 using std::make_pair;
  56 using std::min;
  57 using std::numeric_limits;
  58 using std::out_of_range;
  59 using std::pair;
  60 using std::placeholders::_1;
  61 using std::shared_ptr;
  62 using std::vector;
  63
  64 using pv::data::SignalBase;
  65
  66 namespace pv {
  67 namespace views {
  68 namespace trace {
  69
  70 const QColor AnalogSignal::SignalColours[4] = {
  71         QColor(0xC4, 0xA0, 0x00),       // Yellow
  72         QColor(0x87, 0x20, 0x7A),       // Magenta
  73         QColor(0x20, 0x4A, 0x87),       // Blue
  74         QColor(0x4E, 0x9A, 0x06)        // Green
  75 };
  76
  77 const QPen AnalogSignal::AxisPen(QColor(0, 0, 0, 30 * 256 / 100), 2);
  78 const QColor AnalogSignal::GridMajorColor = QColor(0, 0, 0, 40 * 256 / 100);
  79 const QColor AnalogSignal::GridMinorColor = QColor(0, 0, 0, 20 * 256 / 100);
  80
  81 const QColor AnalogSignal::SamplingPointColour(0x77, 0x77, 0x77);
  82 const QColor AnalogSignal::SamplingPointColourLo = QColor(200, 0, 0, 80 * 256 / 100);
  83 const QColor AnalogSignal::SamplingPointColourNe = QColor(0,   0, 0, 80 * 256 / 100);
  84 const QColor AnalogSignal::SamplingPointColourHi = QColor(0, 200, 0, 80 * 256 / 100);
  85
  86 const QColor AnalogSignal::ThresholdColor = QColor(0, 0, 0, 30 * 256 / 100);
  87 const QColor AnalogSignal::ThresholdColorLo = QColor(255, 0, 0, 8 * 256 / 100);
  88 const QColor AnalogSignal::ThresholdColorNe = QColor(0,   0, 0, 10 * 256 / 100);
  89 const QColor AnalogSignal::ThresholdColorHi = QColor(0, 255, 0, 8 * 256 / 100);
  90
  91 const int64_t AnalogSignal::TracePaintBlockSize = 1024 * 1024;  // 4 MiB (due to float)
  92 const float AnalogSignal::EnvelopeThreshold = 64.0f;
  93
  94 const int AnalogSignal::MaximumVDivs = 10;
  95 const int AnalogSignal::MinScaleIndex = -6;
  96 const int AnalogSignal::MaxScaleIndex = 7;
  97
  98 const int AnalogSignal::InfoTextMarginRight = 20;
  99 const int AnalogSignal::InfoTextMarginBottom = 5;
 100
 101 AnalogSignal::AnalogSignal(
 102         pv::Session &session,
 103         shared_ptr<data::SignalBase> base) :
 104         Signal(session, base),
 105         scale_index_(4), // 20 per div
 106         scale_index_drag_offset_(0),
 107         pos_vdivs_(1),
 108         neg_vdivs_(1),
 109         resolution_(0),
 110         display_type_(DisplayBoth),
 111         autoranging_(true)
 112 {
 113         axis_pen_ = AxisPen;
 114
 115         pv::data::Analog* analog_data =
 116                 dynamic_cast<pv::data::Analog*>(data().get());
 117
 118         connect(analog_data, SIGNAL(min_max_changed(float, float)),
 119                 this, SLOT(on_min_max_changed(float, float)));
 120
 121         GlobalSettings::register_change_handler(GlobalSettings::Key_View_ConversionThresholdDispMode,
 122                 bind(&AnalogSignal::on_settingViewConversionThresholdDispMode_changed, this, _1));
 123
 124         GlobalSettings gs;
 125         conversion_threshold_disp_mode_ =
 126                 gs.value(GlobalSettings::Key_View_ConversionThresholdDispMode).toInt();
 127
 128         div_height_ = gs.value(GlobalSettings::Key_View_DefaultDivHeight).toInt();
 129
 130         base_->set_colour(SignalColours[base_->index() % countof(SignalColours)]);
 131         update_scale();
 132 }
 133
 134 shared_ptr<pv::data::SignalData> AnalogSignal::data() const
 135 {
 136         return base_->analog_data();
 137 }
 138
 139 void AnalogSignal::save_settings(QSettings &settings) const
 140 {
 141         settings.setValue("pos_vdivs", pos_vdivs_);
 142         settings.setValue("neg_vdivs", neg_vdivs_);
 143         settings.setValue("scale_index", scale_index_);
 144         settings.setValue("display_type", display_type_);
 145         settings.setValue("autoranging", autoranging_);
 146         settings.setValue("div_height", div_height_);
 147 }
 148
 149 void AnalogSignal::restore_settings(QSettings &settings)
 150 {
 151         if (settings.contains("pos_vdivs"))
 152                 pos_vdivs_ = settings.value("pos_vdivs").toInt();
 153
 154         if (settings.contains("neg_vdivs"))
 155                 neg_vdivs_ = settings.value("neg_vdivs").toInt();
 156
 157         if (settings.contains("scale_index")) {
 158                 scale_index_ = settings.value("scale_index").toInt();
 159                 update_scale();
 160         }
 161
 162         if (settings.contains("display_type"))
 163                 display_type_ = (DisplayType)(settings.value("display_type").toInt());
 164
 165         if (settings.contains("autoranging"))
 166                 autoranging_ = settings.value("autoranging").toBool();
 167
 168         if (settings.contains("div_height")) {
 169                 const int old_height = div_height_;
 170                 div_height_ = settings.value("div_height").toInt();
 171
 172                 if ((div_height_ != old_height) && owner_) {
 173                         // Call order is important, otherwise the lazy event handler won't work
 174                         owner_->extents_changed(false, true);
 175                         owner_->row_item_appearance_changed(false, true);
 176                 }
 177         }
 178 }
 179
 180 pair<int, int> AnalogSignal::v_extents() const
 181 {
 182         const int ph = pos_vdivs_ * div_height_;
 183         const int nh = neg_vdivs_ * div_height_;
 184         return make_pair(-ph, nh);
 185 }
 186
 187 int AnalogSignal::scale_handle_offset() const
 188 {
 189         const int h = (pos_vdivs_ + neg_vdivs_) * div_height_;
 190
 191         return ((scale_index_drag_offset_ - scale_index_) * h / 4) - h / 2;
 192 }
 193
 194 void AnalogSignal::scale_handle_dragged(int offset)
 195 {
 196         const int h = (pos_vdivs_ + neg_vdivs_) * div_height_;
 197
 198         scale_index_ = scale_index_drag_offset_ - (offset + h / 2) / (h / 4);
 199
 200         update_scale();
 201 }
 202
 203 void AnalogSignal::scale_handle_drag_release()
 204 {
 205         scale_index_drag_offset_ = scale_index_;
 206         update_scale();
 207 }
 208
 209 void AnalogSignal::paint_back(QPainter &p, ViewItemPaintParams &pp)
 210 {
 211         if (!base_->enabled())
 212                 return;
 213
 214         bool paint_thr_bg =
 215                 conversion_threshold_disp_mode_ == GlobalSettings::ConvThrDispMode_Background;
 216
 217         const vector<double> thresholds = base_->get_conversion_thresholds();
 218
 219         // Only display thresholds if we have some and we show analog samples
 220         if ((thresholds.size() > 0) && paint_thr_bg &&
 221                 ((display_type_ == DisplayAnalog) || (display_type_ == DisplayBoth))) {
 222
 223                 const int visual_y = get_visual_y();
 224                 const pair<int, int> extents = v_extents();
 225                 const int top = visual_y + extents.first;
 226                 const int btm = visual_y + extents.second;
 227
 228                 // Draw high/neutral/low areas
 229                 if (thresholds.size() == 2) {
 230                         int thr_lo = visual_y - thresholds[0] * scale_;
 231                         int thr_hi = visual_y - thresholds[1] * scale_;
 232                         thr_lo = min(max(thr_lo, top), btm);
 233                         thr_hi = min(max(thr_hi, top), btm);
 234
 235                         p.fillRect(QRectF(pp.left(), top, pp.width(), thr_hi - top),
 236                                 QBrush(ThresholdColorHi));
 237                         p.fillRect(QRectF(pp.left(), thr_hi, pp.width(), thr_lo - thr_hi),
 238                                 QBrush(ThresholdColorNe));
 239                         p.fillRect(QRectF(pp.left(), thr_lo, pp.width(), btm - thr_lo),
 240                                 QBrush(ThresholdColorLo));
 241                 } else {
 242                         int thr = visual_y - thresholds[0] * scale_;
 243                         thr = min(max(thr, top), btm);
 244
 245                         p.fillRect(QRectF(pp.left(), top, pp.width(), thr - top),
 246                                 QBrush(ThresholdColorHi));
 247                         p.fillRect(QRectF(pp.left(), thr, pp.width(), btm - thr),
 248                                 QBrush(ThresholdColorLo));
 249                 }
 250
 251                 paint_axis(p, pp, get_visual_y());
 252         } else {
 253                 Trace::paint_back(p, pp);
 254                 paint_axis(p, pp, get_visual_y());
 255         }
 256 }
 257
 258 void AnalogSignal::paint_mid(QPainter &p, ViewItemPaintParams &pp)
 259 {
 260         assert(base_->analog_data());
 261         assert(owner_);
 262
 263         const int y = get_visual_y();
 264
 265         if (!base_->enabled())
 266                 return;
 267
 268         if ((display_type_ == DisplayAnalog) || (display_type_ == DisplayBoth)) {
 269                 paint_grid(p, y, pp.left(), pp.right());
 270
 271                 shared_ptr<pv::data::AnalogSegment> segment = get_analog_segment_to_paint();
 272                 if (!segment)
 273                         return;
 274
 275                 const double pixels_offset = pp.pixels_offset();
 276                 const double samplerate = max(1.0, segment->samplerate());
 277                 const pv::util::Timestamp& start_time = segment->start_time();
 278                 const int64_t last_sample = segment->get_sample_count() - 1;
 279                 const double samples_per_pixel = samplerate * pp.scale();
 280                 const pv::util::Timestamp start = samplerate * (pp.offset() - start_time);
 281                 const pv::util::Timestamp end = start + samples_per_pixel * pp.width();
 282
 283                 const int64_t start_sample = min(max(floor(start).convert_to<int64_t>(),
 284                         (int64_t)0), last_sample);
 285                 const int64_t end_sample = min(max((ceil(end) + 1).convert_to<int64_t>(),
 286                         (int64_t)0), last_sample);
 287
 288                 if (samples_per_pixel < EnvelopeThreshold)
 289                         paint_trace(p, segment, y, pp.left(),
 290                                 start_sample, end_sample,
 291                                 pixels_offset, samples_per_pixel);
 292                 else
 293                         paint_envelope(p, segment, y, pp.left(),
 294                                 start_sample, end_sample,
 295                                 pixels_offset, samples_per_pixel);
 296         }
 297
 298         if ((display_type_ == DisplayConverted) || (display_type_ == DisplayBoth))
 299                 paint_logic_mid(p, pp);
 300 }
 301
 302 void AnalogSignal::paint_fore(QPainter &p, ViewItemPaintParams &pp)
 303 {
 304         if (!enabled())
 305                 return;
 306
 307         if ((display_type_ == DisplayAnalog) || (display_type_ == DisplayBoth)) {
 308                 const int y = get_visual_y();
 309
 310                 // Show the info section on the right side of the trace
 311                 const QString infotext = QString("%1 V/div").arg(resolution_);
 312
 313                 p.setPen(base_->colour());
 314                 p.setFont(QApplication::font());
 315
 316                 const QRectF bounding_rect = QRectF(pp.left(),
 317                                 y + v_extents().first,
 318                                 pp.width() - InfoTextMarginRight,
 319                                 v_extents().second - v_extents().first - InfoTextMarginBottom);
 320
 321                 p.drawText(bounding_rect, Qt::AlignRight | Qt::AlignBottom, infotext);
 322         }
 323 }
 324
 325 void AnalogSignal::paint_grid(QPainter &p, int y, int left, int right)
 326 {
 327         p.setRenderHint(QPainter::Antialiasing, false);
 328
 329         GlobalSettings settings;
 330         const bool show_analog_minor_grid =
 331                 settings.value(GlobalSettings::Key_View_ShowAnalogMinorGrid).toBool();
 332
 333         if (pos_vdivs_ > 0) {
 334                 p.setPen(QPen(GridMajorColor, 1, Qt::DashLine));
 335                 for (int i = 1; i <= pos_vdivs_; i++) {
 336                         const float dy = i * div_height_;
 337                         p.drawLine(QLineF(left, y - dy, right, y - dy));
 338                 }
 339         }
 340
 341         if ((pos_vdivs_ > 0) && show_analog_minor_grid) {
 342                 p.setPen(QPen(GridMinorColor, 1, Qt::DashLine));
 343                 for (int i = 0; i < pos_vdivs_; i++) {
 344                         const float dy = i * div_height_;
 345                         const float dy25 = dy + (0.25 * div_height_);
 346                         const float dy50 = dy + (0.50 * div_height_);
 347                         const float dy75 = dy + (0.75 * div_height_);
 348                         p.drawLine(QLineF(left, y - dy25, right, y - dy25));
 349                         p.drawLine(QLineF(left, y - dy50, right, y - dy50));
 350                         p.drawLine(QLineF(left, y - dy75, right, y - dy75));
 351                 }
 352         }
 353
 354         if (neg_vdivs_ > 0) {
 355                 p.setPen(QPen(GridMajorColor, 1, Qt::DashLine));
 356                 for (int i = 1; i <= neg_vdivs_; i++) {
 357                         const float dy = i * div_height_;
 358                         p.drawLine(QLineF(left, y + dy, right, y + dy));
 359                 }
 360         }
 361
 362         if ((pos_vdivs_ > 0) && show_analog_minor_grid) {
 363                 p.setPen(QPen(GridMinorColor, 1, Qt::DashLine));
 364                 for (int i = 0; i < neg_vdivs_; i++) {
 365                         const float dy = i * div_height_;
 366                         const float dy25 = dy + (0.25 * div_height_);
 367                         const float dy50 = dy + (0.50 * div_height_);
 368                         const float dy75 = dy + (0.75 * div_height_);
 369                         p.drawLine(QLineF(left, y + dy25, right, y + dy25));
 370                         p.drawLine(QLineF(left, y + dy50, right, y + dy50));
 371                         p.drawLine(QLineF(left, y + dy75, right, y + dy75));
 372                 }
 373         }
 374
 375         p.setRenderHint(QPainter::Antialiasing, true);
 376 }
 377
 378 void AnalogSignal::paint_trace(QPainter &p,
 379         const shared_ptr<pv::data::AnalogSegment> &segment,
 380         int y, int left, const int64_t start, const int64_t end,
 381         const double pixels_offset, const double samples_per_pixel)
 382 {
 383         if (end <= start)
 384                 return;
 385
 386         bool paint_thr_dots =
 387                 (base_->get_conversion_type() != data::SignalBase::NoConversion) &&
 388                 (conversion_threshold_disp_mode_ == GlobalSettings::ConvThrDispMode_Dots);
 389
 390         vector<double> thresholds;
 391         if (paint_thr_dots)
 392                 thresholds = base_->get_conversion_thresholds();
 393
 394         // Calculate and paint the sampling points if enabled and useful
 395         GlobalSettings settings;
 396         const bool show_sampling_points =
 397                 (settings.value(GlobalSettings::Key_View_ShowSamplingPoints).toBool() ||
 398                 paint_thr_dots) && (samples_per_pixel < 0.25);
 399
 400         p.setPen(base_->colour());
 401
 402         const int64_t points_count = end - start;
 403
 404         QPointF *points = new QPointF[points_count];
 405         QPointF *point = points;
 406
 407         vector<QRectF> sampling_points[3];
 408
 409         int64_t sample_count = min(points_count, TracePaintBlockSize);
 410         int64_t block_sample = 0;
 411         float *sample_block = new float[TracePaintBlockSize];
 412         segment->get_samples(start, start + sample_count, sample_block);
 413
 414         const int w = 2;
 415         for (int64_t sample = start; sample != end; sample++, block_sample++) {
 416
 417                 if (block_sample == TracePaintBlockSize) {
 418                         block_sample = 0;
 419                         sample_count = min(points_count - sample, TracePaintBlockSize);
 420                         segment->get_samples(sample, sample + sample_count, sample_block);
 421                 }
 422
 423                 const float x = (sample / samples_per_pixel -
 424                         pixels_offset) + left;
 425
 426                 *point++ = QPointF(x, y - sample_block[block_sample] * scale_);
 427
 428                 if (show_sampling_points) {
 429                         int idx = 0;  // Neutral
 430
 431                         if (paint_thr_dots) {
 432                                 if (thresholds.size() == 1)
 433                                         idx = (sample_block[block_sample] >= thresholds[0]) ? 2 : 1;
 434                                 else if (thresholds.size() == 2) {
 435                                         if (sample_block[block_sample] > thresholds[1])
 436                                                 idx = 2;  // High
 437                                         else if (sample_block[block_sample] < thresholds[0])
 438                                                 idx = 1;  // Low
 439                                 }
 440                         }
 441
 442                         sampling_points[idx].push_back(
 443                                 QRectF(x - (w / 2), y - sample_block[block_sample] * scale_ - (w / 2), w, w));
 444                 }
 445         }
 446         delete[] sample_block;
 447
 448         p.drawPolyline(points, points_count);
 449
 450         if (show_sampling_points) {
 451                 if (paint_thr_dots) {
 452                         p.setPen(SamplingPointColourNe);
 453                         p.drawRects(sampling_points[0].data(), sampling_points[0].size());
 454                         p.setPen(SamplingPointColourLo);
 455                         p.drawRects(sampling_points[1].data(), sampling_points[1].size());
 456                         p.setPen(SamplingPointColourHi);
 457                         p.drawRects(sampling_points[2].data(), sampling_points[2].size());
 458                 } else {
 459                         p.setPen(SamplingPointColour);
 460                         p.drawRects(sampling_points[0].data(), sampling_points[0].size());
 461                 }
 462         }
 463
 464         delete[] points;
 465 }
 466
 467 void AnalogSignal::paint_envelope(QPainter &p,
 468         const shared_ptr<pv::data::AnalogSegment> &segment,
 469         int y, int left, const int64_t start, const int64_t end,
 470         const double pixels_offset, const double samples_per_pixel)
 471 {
 472         using pv::data::AnalogSegment;
 473
 474         AnalogSegment::EnvelopeSection e;
 475         segment->get_envelope_section(e, start, end, samples_per_pixel);
 476
 477         if (e.length < 2)
 478                 return;
 479
 480         p.setPen(QPen(Qt::NoPen));
 481         p.setBrush(base_->colour());
 482
 483         QRectF *const rects = new QRectF[e.length];
 484         QRectF *rect = rects;
 485
 486         for (uint64_t sample = 0; sample < e.length - 1; sample++) {
 487                 const float x = ((e.scale * sample + e.start) /
 488                         samples_per_pixel - pixels_offset) + left;
 489                 const AnalogSegment::EnvelopeSample *const s =
 490                         e.samples + sample;
 491
 492                 // We overlap this sample with the next so that vertical
 493                 // gaps do not appear during steep rising or falling edges
 494                 const float b = y - max(s->max, (s + 1)->min) * scale_;
 495                 const float t = y - min(s->min, (s + 1)->max) * scale_;
 496
 497                 float h = b - t;
 498                 if (h >= 0.0f && h <= 1.0f)
 499                         h = 1.0f;
 500                 if (h <= 0.0f && h >= -1.0f)
 501                         h = -1.0f;
 502
 503                 *rect++ = QRectF(x, t, 1.0f, h);
 504         }
 505
 506         p.drawRects(rects, e.length);
 507
 508         delete[] rects;
 509         delete[] e.samples;
 510 }
 511
 512 void AnalogSignal::paint_logic_mid(QPainter &p, ViewItemPaintParams &pp)
 513 {
 514         QLineF *line;
 515
 516         vector< pair<int64_t, bool> > edges;
 517
 518         assert(base_);
 519
 520         const int y = get_visual_y();
 521
 522         if (!base_->enabled() || !base_->logic_data())
 523                 return;
 524
 525         const int signal_margin =
 526                 QFontMetrics(QApplication::font()).height() / 2;
 527
 528         const int ph = min(pos_vdivs_, 1) * div_height_;
 529         const int nh = min(neg_vdivs_, 1) * div_height_;
 530         const float high_offset = y - ph + signal_margin + 0.5f;
 531         const float low_offset = y + nh - signal_margin - 0.5f;
 532
 533         shared_ptr<pv::data::LogicSegment> segment = get_logic_segment_to_paint();
 534         if (!segment)
 535                 return;
 536
 537         double samplerate = segment->samplerate();
 538
 539         // Show sample rate as 1Hz when it is unknown
 540         if (samplerate == 0.0)
 541                 samplerate = 1.0;
 542
 543         const double pixels_offset = pp.pixels_offset();
 544         const pv::util::Timestamp& start_time = segment->start_time();
 545         const int64_t last_sample = segment->get_sample_count() - 1;
 546         const double samples_per_pixel = samplerate * pp.scale();
 547         const double pixels_per_sample = 1 / samples_per_pixel;
 548         const pv::util::Timestamp start = samplerate * (pp.offset() - start_time);
 549         const pv::util::Timestamp end = start + samples_per_pixel * pp.width();
 550
 551         const int64_t start_sample = min(max(floor(start).convert_to<int64_t>(),
 552                 (int64_t)0), last_sample);
 553         const uint64_t end_sample = min(max(ceil(end).convert_to<int64_t>(),
 554                 (int64_t)0), last_sample);
 555
 556         segment->get_subsampled_edges(edges, start_sample, end_sample,
 557                 samples_per_pixel / LogicSignal::Oversampling, 0);
 558         assert(edges.size() >= 2);
 559
 560         // Check whether we need to paint the sampling points
 561         GlobalSettings settings;
 562         const bool show_sampling_points =
 563                 settings.value(GlobalSettings::Key_View_ShowSamplingPoints).toBool() &&
 564                 (samples_per_pixel < 0.25);
 565
 566         vector<QRectF> sampling_points;
 567         float sampling_point_x = 0.0f;
 568         int64_t sampling_point_sample = start_sample;
 569         const int w = 2;
 570
 571         if (show_sampling_points) {
 572                 sampling_points.reserve(end_sample - start_sample + 1);
 573                 sampling_point_x = (edges.cbegin()->first / samples_per_pixel - pixels_offset) + pp.left();
 574         }
 575
 576         // Paint the edges
 577         const unsigned int edge_count = edges.size() - 2;
 578         QLineF *const edge_lines = new QLineF[edge_count];
 579         line = edge_lines;
 580
 581         for (auto i = edges.cbegin() + 1; i != edges.cend() - 1; i++) {
 582                 const float x = ((*i).first / samples_per_pixel -
 583                         pixels_offset) + pp.left();
 584                 *line++ = QLineF(x, high_offset, x, low_offset);
 585
 586                 if (show_sampling_points)
 587                         while (sampling_point_sample < (*i).first) {
 588                                 const float y = (*i).second ? low_offset : high_offset;
 589                                 sampling_points.emplace_back(
 590                                         QRectF(sampling_point_x - (w / 2), y - (w / 2), w, w));
 591                                 sampling_point_sample++;
 592                                 sampling_point_x += pixels_per_sample;
 593                         };
 594         }
 595
 596         // Calculate the sample points from the last edge to the end of the trace
 597         if (show_sampling_points)
 598                 while ((uint64_t)sampling_point_sample <= end_sample) {
 599                         // Signal changed after the last edge, so the level is inverted
 600                         const float y = (edges.cend() - 1)->second ? high_offset : low_offset;
 601                         sampling_points.emplace_back(
 602                                 QRectF(sampling_point_x - (w / 2), y - (w / 2), w, w));
 603                         sampling_point_sample++;
 604                         sampling_point_x += pixels_per_sample;
 605                 };
 606
 607         p.setPen(LogicSignal::EdgeColour);
 608         p.drawLines(edge_lines, edge_count);
 609         delete[] edge_lines;
 610
 611         // Paint the caps
 612         const unsigned int max_cap_line_count = edges.size();
 613         QLineF *const cap_lines = new QLineF[max_cap_line_count];
 614
 615         p.setPen(LogicSignal::HighColour);
 616         paint_logic_caps(p, cap_lines, edges, true, samples_per_pixel,
 617                 pixels_offset, pp.left(), high_offset);
 618         p.setPen(LogicSignal::LowColour);
 619         paint_logic_caps(p, cap_lines, edges, false, samples_per_pixel,
 620                 pixels_offset, pp.left(), low_offset);
 621
 622         delete[] cap_lines;
 623
 624         // Paint the sampling points
 625         if (show_sampling_points) {
 626                 p.setPen(SamplingPointColour);
 627                 p.drawRects(sampling_points.data(), sampling_points.size());
 628         }
 629 }
 630
 631 void AnalogSignal::paint_logic_caps(QPainter &p, QLineF *const lines,
 632         vector< pair<int64_t, bool> > &edges, bool level,
 633         double samples_per_pixel, double pixels_offset, float x_offset,
 634         float y_offset)
 635 {
 636         QLineF *line = lines;
 637
 638         for (auto i = edges.begin(); i != (edges.end() - 1); i++)
 639                 if ((*i).second == level) {
 640                         *line++ = QLineF(
 641                                 ((*i).first / samples_per_pixel -
 642                                         pixels_offset) + x_offset, y_offset,
 643                                 ((*(i+1)).first / samples_per_pixel -
 644                                         pixels_offset) + x_offset, y_offset);
 645                 }
 646
 647         p.drawLines(lines, line - lines);
 648 }
 649
 650 shared_ptr<pv::data::AnalogSegment> AnalogSignal::get_analog_segment_to_paint() const
 651 {
 652         shared_ptr<pv::data::AnalogSegment> segment;
 653
 654         const deque< shared_ptr<pv::data::AnalogSegment> > &segments =
 655                 base_->analog_data()->analog_segments();
 656
 657         if (!segments.empty()) {
 658                 if (segment_display_mode_ == ShowLastSegmentOnly)
 659                         segment = segments.back();
 660
 661                 if ((segment_display_mode_ == ShowSingleSegmentOnly) ||
 662                                 (segment_display_mode_ == ShowLastCompleteSegmentOnly)) {
 663                         try {
 664                                 segment = segments.at(current_segment_);
 665                         } catch (out_of_range) {
 666                                 qDebug() << "Current analog segment out of range for signal" << base_->name() << ":" << current_segment_;
 667                         }
 668                 }
 669         }
 670
 671         return segment;
 672 }
 673
 674 shared_ptr<pv::data::LogicSegment> AnalogSignal::get_logic_segment_to_paint() const
 675 {
 676         shared_ptr<pv::data::LogicSegment> segment;
 677
 678         const deque< shared_ptr<pv::data::LogicSegment> > &segments =
 679                 base_->logic_data()->logic_segments();
 680
 681         if (!segments.empty()) {
 682                 if (segment_display_mode_ == ShowLastSegmentOnly)
 683                         segment = segments.back();
 684
 685                 if ((segment_display_mode_ == ShowSingleSegmentOnly) ||
 686                                 (segment_display_mode_ == ShowLastCompleteSegmentOnly)) {
 687                         try {
 688                                 segment = segments.at(current_segment_);
 689                         } catch (out_of_range) {
 690                                 qDebug() << "Current logic segment out of range for signal" << base_->name() << ":" << current_segment_;
 691                         }
 692                 }
 693         }
 694
 695         return segment;
 696 }
 697
 698 float AnalogSignal::get_resolution(int scale_index)
 699 {
 700         const float seq[] = {1.0f, 2.0f, 5.0f};
 701
 702         const int offset = numeric_limits<int>::max() / (2 * countof(seq));
 703         const div_t d = div((int)(scale_index + countof(seq) * offset),
 704                 countof(seq));
 705
 706         return powf(10.0f, d.quot - offset) * seq[d.rem];
 707 }
 708
 709 void AnalogSignal::update_scale()
 710 {
 711         resolution_ = get_resolution(scale_index_);
 712         scale_ = div_height_ / resolution_;
 713 }
 714
 715 void AnalogSignal::update_conversion_widgets()
 716 {
 717         SignalBase::ConversionType conv_type = base_->get_conversion_type();
 718
 719         // Enable or disable widgets depending on conversion state
 720         conv_threshold_cb_->setEnabled(conv_type != SignalBase::NoConversion);
 721         display_type_cb_->setEnabled(conv_type != SignalBase::NoConversion);
 722
 723         conv_threshold_cb_->clear();
 724
 725         vector < pair<QString, int> > presets = base_->get_conversion_presets();
 726
 727         // Prevent the combo box from firing the "edit text changed" signal
 728         // as that would involuntarily select the first entry
 729         conv_threshold_cb_->blockSignals(true);
 730
 731         // Set available options depending on chosen conversion
 732         for (pair<QString, int> preset : presets)
 733                 conv_threshold_cb_->addItem(preset.first, preset.second);
 734
 735         map < QString, QVariant > options = base_->get_conversion_options();
 736
 737         if (conv_type == SignalBase::A2LConversionByThreshold) {
 738                 const vector<double> thresholds = base_->get_conversion_thresholds(
 739                                 SignalBase::A2LConversionByThreshold, true);
 740                 conv_threshold_cb_->addItem(
 741                                 QString("%1V").arg(QString::number(thresholds[0], 'f', 1)), -1);
 742         }
 743
 744         if (conv_type == SignalBase::A2LConversionBySchmittTrigger) {
 745                 const vector<double> thresholds = base_->get_conversion_thresholds(
 746                                 SignalBase::A2LConversionBySchmittTrigger, true);
 747                 conv_threshold_cb_->addItem(QString("%1V/%2V").arg(
 748                                 QString::number(thresholds[0], 'f', 1),
 749                                 QString::number(thresholds[1], 'f', 1)), -1);
 750         }
 751
 752         int preset_id = base_->get_current_conversion_preset();
 753         conv_threshold_cb_->setCurrentIndex(
 754                         conv_threshold_cb_->findData(preset_id));
 755
 756         conv_threshold_cb_->blockSignals(false);
 757 }
 758
 759 void AnalogSignal::perform_autoranging(bool keep_divs, bool force_update)
 760 {
 761         const deque< shared_ptr<pv::data::AnalogSegment> > &segments =
 762                 base_->analog_data()->analog_segments();
 763
 764         if (segments.empty())
 765                 return;
 766
 767         static double prev_min = 0, prev_max = 0;
 768         double min = 0, max = 0;
 769
 770         for (shared_ptr<pv::data::AnalogSegment> segment : segments) {
 771                 pair<double, double> mm = segment->get_min_max();
 772                 min = std::min(min, mm.first);
 773                 max = std::max(max, mm.second);
 774         }
 775
 776         if ((min == prev_min) && (max == prev_max) && !force_update)
 777                 return;
 778
 779         prev_min = min;
 780         prev_max = max;
 781
 782         // If we're allowed to alter the div assignment...
 783         if (!keep_divs) {
 784                 // Use all divs for the positive range if there are no negative values
 785                 if ((min == 0) && (neg_vdivs_ > 0)) {
 786                         pos_vdivs_ += neg_vdivs_;
 787                         neg_vdivs_ = 0;
 788                 }
 789
 790                 // Split up the divs if there are negative values but no negative divs
 791                 if ((min < 0) && (neg_vdivs_ == 0)) {
 792                         neg_vdivs_ = pos_vdivs_ / 2;
 793                         pos_vdivs_ -= neg_vdivs_;
 794                 }
 795         }
 796
 797         // If there is still no positive div when we need it, add one
 798         // (this can happen when pos_vdivs==neg_vdivs==0)
 799         if ((max > 0) && (pos_vdivs_ == 0)) {
 800                 pos_vdivs_ = 1;
 801                 owner_->extents_changed(false, true);
 802         }
 803
 804         // If there is still no negative div when we need it, add one
 805         // (this can happen when pos_vdivs was 0 or 1 when trying to split)
 806         if ((min < 0) && (neg_vdivs_ == 0)) {
 807                 neg_vdivs_ = 1;
 808                 owner_->extents_changed(false, true);
 809         }
 810
 811         double min_value_per_div;
 812         if ((pos_vdivs_ > 0) && (neg_vdivs_ >  0))
 813                 min_value_per_div = std::max(max / pos_vdivs_, -min / neg_vdivs_);
 814         else if (pos_vdivs_ > 0)
 815                 min_value_per_div = max / pos_vdivs_;
 816         else
 817                 min_value_per_div = -min / neg_vdivs_;
 818
 819         // Find first scale value that is bigger than the value we need
 820         for (int i = MinScaleIndex; i < MaxScaleIndex; i++)
 821                 if (get_resolution(i) > min_value_per_div) {
 822                         scale_index_ = i;
 823                         break;
 824                 }
 825
 826         update_scale();
 827 }
 828
 829 void AnalogSignal::populate_popup_form(QWidget *parent, QFormLayout *form)
 830 {
 831         // Add the standard options
 832         Signal::populate_popup_form(parent, form);
 833
 834         QFormLayout *const layout = new QFormLayout;
 835
 836         // Add div-related settings
 837         pvdiv_sb_ = new QSpinBox(parent);
 838         pvdiv_sb_->setRange(0, MaximumVDivs);
 839         pvdiv_sb_->setValue(pos_vdivs_);
 840         connect(pvdiv_sb_, SIGNAL(valueChanged(int)),
 841                 this, SLOT(on_pos_vdivs_changed(int)));
 842         layout->addRow(tr("Number of pos vertical divs"), pvdiv_sb_);
 843
 844         nvdiv_sb_ = new QSpinBox(parent);
 845         nvdiv_sb_->setRange(0, MaximumVDivs);
 846         nvdiv_sb_->setValue(neg_vdivs_);
 847         connect(nvdiv_sb_, SIGNAL(valueChanged(int)),
 848                 this, SLOT(on_neg_vdivs_changed(int)));
 849         layout->addRow(tr("Number of neg vertical divs"), nvdiv_sb_);
 850
 851         div_height_sb_ = new QSpinBox(parent);
 852         div_height_sb_->setRange(20, 1000);
 853         div_height_sb_->setSingleStep(5);
 854         div_height_sb_->setSuffix(tr(" pixels"));
 855         div_height_sb_->setValue(div_height_);
 856         connect(div_height_sb_, SIGNAL(valueChanged(int)),
 857                 this, SLOT(on_div_height_changed(int)));
 858         layout->addRow(tr("Div height"), div_height_sb_);
 859
 860         // Add the vertical resolution
 861         resolution_cb_ = new QComboBox(parent);
 862
 863         for (int i = MinScaleIndex; i < MaxScaleIndex; i++) {
 864                 const QString label = QString("%1").arg(get_resolution(i));
 865                 resolution_cb_->insertItem(0, label, QVariant(i));
 866         }
 867
 868         int cur_idx = resolution_cb_->findData(QVariant(scale_index_));
 869         resolution_cb_->setCurrentIndex(cur_idx);
 870
 871         connect(resolution_cb_, SIGNAL(currentIndexChanged(int)),
 872                 this, SLOT(on_resolution_changed(int)));
 873
 874         QGridLayout *const vdiv_layout = new QGridLayout;
 875         QLabel *const vdiv_unit = new QLabel(tr("V/div"));
 876         vdiv_layout->addWidget(resolution_cb_, 0, 0);
 877         vdiv_layout->addWidget(vdiv_unit, 0, 1);
 878
 879         layout->addRow(tr("Vertical resolution"), vdiv_layout);
 880
 881         // Add the autoranging checkbox
 882         QCheckBox* autoranging_cb = new QCheckBox();
 883         autoranging_cb->setCheckState(autoranging_ ? Qt::Checked : Qt::Unchecked);
 884
 885         connect(autoranging_cb, SIGNAL(stateChanged(int)),
 886                 this, SLOT(on_autoranging_changed(int)));
 887
 888         layout->addRow(tr("Autoranging"), autoranging_cb);
 889
 890         // Add the conversion type dropdown
 891         conversion_cb_ = new QComboBox();
 892
 893         conversion_cb_->addItem(tr("none"),
 894                 SignalBase::NoConversion);
 895         conversion_cb_->addItem(tr("to logic via threshold"),
 896                 SignalBase::A2LConversionByThreshold);
 897         conversion_cb_->addItem(tr("to logic via schmitt-trigger"),
 898                 SignalBase::A2LConversionBySchmittTrigger);
 899
 900         cur_idx = conversion_cb_->findData(QVariant(base_->get_conversion_type()));
 901         conversion_cb_->setCurrentIndex(cur_idx);
 902
 903         layout->addRow(tr("Conversion"), conversion_cb_);
 904
 905         connect(conversion_cb_, SIGNAL(currentIndexChanged(int)),
 906                 this, SLOT(on_conversion_changed(int)));
 907
 908     // Add the conversion threshold settings
 909     conv_threshold_cb_ = new QComboBox();
 910     conv_threshold_cb_->setEditable(true);
 911
 912     layout->addRow(tr("Conversion threshold(s)"), conv_threshold_cb_);
 913
 914     connect(conv_threshold_cb_, SIGNAL(currentIndexChanged(int)),
 915             this, SLOT(on_conv_threshold_changed(int)));
 916     connect(conv_threshold_cb_, SIGNAL(editTextChanged(const QString)),
 917             this, SLOT(on_conv_threshold_changed()));  // index will be -1
 918
 919         // Add the display type dropdown
 920         display_type_cb_ = new QComboBox();
 921
 922         display_type_cb_->addItem(tr("analog"), DisplayAnalog);
 923         display_type_cb_->addItem(tr("converted"), DisplayConverted);
 924         display_type_cb_->addItem(tr("analog+converted"), DisplayBoth);
 925
 926         cur_idx = display_type_cb_->findData(QVariant(display_type_));
 927         display_type_cb_->setCurrentIndex(cur_idx);
 928
 929         layout->addRow(tr("Show traces for"), display_type_cb_);
 930
 931         connect(display_type_cb_, SIGNAL(currentIndexChanged(int)),
 932                 this, SLOT(on_display_type_changed(int)));
 933
 934         // Update the conversion widget contents and states
 935         update_conversion_widgets();
 936
 937         form->addRow(layout);
 938 }
 939
 940 void AnalogSignal::on_min_max_changed(float min, float max)
 941 {
 942         (void)min;
 943         (void)max;
 944
 945         if (autoranging_)
 946                 perform_autoranging(false, false);
 947 }
 948
 949 void AnalogSignal::on_pos_vdivs_changed(int vdivs)
 950 {
 951         if (vdivs == pos_vdivs_)
 952                 return;
 953
 954         pos_vdivs_ = vdivs;
 955
 956         // There has to be at least one div, positive or negative
 957         if ((neg_vdivs_ == 0) && (pos_vdivs_ == 0)) {
 958                 pos_vdivs_ = 1;
 959                 if (pvdiv_sb_)
 960                         pvdiv_sb_->setValue(pos_vdivs_);
 961         }
 962
 963         if (autoranging_) {
 964                 perform_autoranging(true, true);
 965
 966                 // It could be that a positive or negative div was added, so update
 967                 if (pvdiv_sb_) {
 968                         pvdiv_sb_->setValue(pos_vdivs_);
 969                         nvdiv_sb_->setValue(neg_vdivs_);
 970                 }
 971         }
 972
 973         if (owner_) {
 974                 // Call order is important, otherwise the lazy event handler won't work
 975                 owner_->extents_changed(false, true);
 976                 owner_->row_item_appearance_changed(false, true);
 977         }
 978 }
 979
 980 void AnalogSignal::on_neg_vdivs_changed(int vdivs)
 981 {
 982         if (vdivs == neg_vdivs_)
 983                 return;
 984
 985         neg_vdivs_ = vdivs;
 986
 987         // There has to be at least one div, positive or negative
 988         if ((neg_vdivs_ == 0) && (pos_vdivs_ == 0)) {
 989                 pos_vdivs_ = 1;
 990                 if (pvdiv_sb_)
 991                         pvdiv_sb_->setValue(pos_vdivs_);
 992         }
 993
 994         if (autoranging_) {
 995                 perform_autoranging(true, true);
 996
 997                 // It could be that a positive or negative div was added, so update
 998                 if (pvdiv_sb_) {
 999                         pvdiv_sb_->setValue(pos_vdivs_);
1000                         nvdiv_sb_->setValue(neg_vdivs_);
1001                 }
1002         }
1003
1004         if (owner_) {
1005                 // Call order is important, otherwise the lazy event handler won't work
1006                 owner_->extents_changed(false, true);
1007                 owner_->row_item_appearance_changed(false, true);
1008         }
1009 }
1010
1011 void AnalogSignal::on_div_height_changed(int height)
1012 {
1013         div_height_ = height;
1014         update_scale();
1015
1016         if (owner_) {
1017                 // Call order is important, otherwise the lazy event handler won't work
1018                 owner_->extents_changed(false, true);
1019                 owner_->row_item_appearance_changed(false, true);
1020         }
1021 }
1022
1023 void AnalogSignal::on_resolution_changed(int index)
1024 {
1025         scale_index_ = resolution_cb_->itemData(index).toInt();
1026         update_scale();
1027
1028         if (owner_)
1029                 owner_->row_item_appearance_changed(false, true);
1030 }
1031
1032 void AnalogSignal::on_autoranging_changed(int state)
1033 {
1034         autoranging_ = (state == Qt::Checked);
1035
1036         if (autoranging_)
1037                 perform_autoranging(false, true);
1038
1039         if (owner_) {
1040                 // Call order is important, otherwise the lazy event handler won't work
1041                 owner_->extents_changed(false, true);
1042                 owner_->row_item_appearance_changed(false, true);
1043         }
1044 }
1045
1046 void AnalogSignal::on_conversion_changed(int index)
1047 {
1048         SignalBase::ConversionType old_conv_type = base_->get_conversion_type();
1049
1050         SignalBase::ConversionType conv_type =
1051                 (SignalBase::ConversionType)(conversion_cb_->itemData(index).toInt());
1052
1053         if (conv_type != old_conv_type) {
1054                 base_->set_conversion_type(conv_type);
1055                 update_conversion_widgets();
1056
1057                 if (owner_)
1058                         owner_->row_item_appearance_changed(false, true);
1059         }
1060 }
1061
1062 void AnalogSignal::on_conv_threshold_changed(int index)
1063 {
1064         SignalBase::ConversionType conv_type = base_->get_conversion_type();
1065
1066         // Note: index is set to -1 if the text in the combo box matches none of
1067         // the entries in the combo box
1068
1069         if ((index == -1) && (conv_threshold_cb_->currentText().length() == 0))
1070                 return;
1071
1072         // The combo box entry with the custom value has user_data set to -1
1073         const int user_data = conv_threshold_cb_->findText(
1074                         conv_threshold_cb_->currentText());
1075
1076         const bool use_custom_thr = (index == -1) || (user_data == -1);
1077
1078         if (conv_type == SignalBase::A2LConversionByThreshold && use_custom_thr) {
1079                 // Not one of the preset values, try to parse the combo box text
1080                 // Note: Regex loosely based on
1081                 // https://txt2re.com/index-c++.php3?s=0.1V&1&-13
1082                 QString re1 = "([+-]?\\d*[\\.,]?\\d*)"; // Float value
1083                 QString re2 = "([a-zA-Z]*)"; // SI unit
1084                 QRegExp regex(re1 + re2);
1085
1086                 const QString text = conv_threshold_cb_->currentText();
1087                 if (!regex.exactMatch(text))
1088                         return;  // String doesn't match the regex
1089
1090                 QStringList tokens = regex.capturedTexts();
1091
1092                 // For now, we simply assume that the unit is volt without modifiers
1093                 const double thr = tokens.at(1).toDouble();
1094
1095                 // Only restart the conversion if the threshold was updated.
1096                 // We're starting a delayed conversion because the user may still be
1097                 // typing and the UI would lag if we kept on restarting it immediately
1098                 if (base_->set_conversion_option("threshold_value", thr))
1099                         base_->start_conversion(true);
1100         }
1101
1102         if (conv_type == SignalBase::A2LConversionBySchmittTrigger && use_custom_thr) {
1103                 // Not one of the preset values, try to parse the combo box text
1104                 // Note: Regex loosely based on
1105                 // https://txt2re.com/index-c++.php3?s=0.1V/0.2V&2&14&-22&3&15
1106                 QString re1 = "([+-]?\\d*[\\.,]?\\d*)"; // Float value
1107                 QString re2 = "([a-zA-Z]*)"; // SI unit
1108                 QString re3 = "\\/"; // Forward slash, not captured
1109                 QString re4 = "([+-]?\\d*[\\.,]?\\d*)"; // Float value
1110                 QString re5 = "([a-zA-Z]*)"; // SI unit
1111                 QRegExp regex(re1 + re2 + re3 + re4 + re5);
1112
1113                 const QString text = conv_threshold_cb_->currentText();
1114                 if (!regex.exactMatch(text))
1115                         return;  // String doesn't match the regex
1116
1117                 QStringList tokens = regex.capturedTexts();
1118
1119                 // For now, we simply assume that the unit is volt without modifiers
1120                 const double low_thr = tokens.at(1).toDouble();
1121                 const double high_thr = tokens.at(3).toDouble();
1122
1123                 // Only restart the conversion if one of the options was updated.
1124                 // We're starting a delayed conversion because the user may still be
1125                 // typing and the UI would lag if we kept on restarting it immediately
1126                 bool o1 = base_->set_conversion_option("threshold_value_low", low_thr);
1127                 bool o2 = base_->set_conversion_option("threshold_value_high", high_thr);
1128                 if (o1 || o2)
1129                         base_->start_conversion(true);  // Start delayed conversion
1130         }
1131
1132         base_->set_conversion_preset((SignalBase::ConversionPreset)index);
1133
1134         // Immediately start the conversion if we're not using custom values
1135         // (i.e. we're using one of the presets)
1136         if (!use_custom_thr)
1137                 base_->start_conversion();
1138 }
1139
1140 void AnalogSignal::on_delayed_conversion_starter()
1141 {
1142         base_->start_conversion();
1143 }
1144
1145 void AnalogSignal::on_display_type_changed(int index)
1146 {
1147         display_type_ = (DisplayType)(display_type_cb_->itemData(index).toInt());
1148
1149         if (owner_)
1150                 owner_->row_item_appearance_changed(false, true);
1151 }
1152
1153 void AnalogSignal::on_settingViewConversionThresholdDispMode_changed(const QVariant new_value)
1154 {
1155         conversion_threshold_disp_mode_ = new_value.toInt();
1156
1157         if (owner_)
1158                 owner_->row_item_appearance_changed(false, true);
1159 }
1160
1161 } // namespace trace
1162 } // namespace views
1163 } // namespace pv