pv/views/trace/analogsignal.cpp

   1 /*
   2  * This file is part of the PulseView project.
   3  *
   4  * Copyright (C) 2012 Joel Holdsworth <joel@airwebreathe.org.uk>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 #include <extdef.h>
  21
  22 #include <cassert>
  23 #include <cmath>
  24 #include <cstdlib>
  25 #include <limits>
  26 #include <vector>
  27
  28 #include <QApplication>
  29 #include <QCheckBox>
  30 #include <QComboBox>
  31 #include <QFormLayout>
  32 #include <QGridLayout>
  33 #include <QLabel>
  34 #include <QString>
  35
  36 #include "analogsignal.hpp"
  37 #include "logicsignal.hpp"
  38 #include "view.hpp"
  39
  40 #include "pv/data/analog.hpp"
  41 #include "pv/data/analogsegment.hpp"
  42 #include "pv/data/logic.hpp"
  43 #include "pv/data/logicsegment.hpp"
  44 #include "pv/data/signalbase.hpp"
  45 #include "pv/globalsettings.hpp"
  46
  47 #include <libsigrokcxx/libsigrokcxx.hpp>
  48
  49 using std::deque;
  50 using std::div;
  51 using std::div_t;
  52 using std::max;
  53 using std::make_pair;
  54 using std::min;
  55 using std::numeric_limits;
  56 using std::pair;
  57 using std::shared_ptr;
  58 using std::vector;
  59
  60 using pv::data::SignalBase;
  61
  62 namespace pv {
  63 namespace views {
  64 namespace trace {
  65
  66 const QColor AnalogSignal::SignalColours[4] = {
  67         QColor(0xC4, 0xA0, 0x00),       // Yellow
  68         QColor(0x87, 0x20, 0x7A),       // Magenta
  69         QColor(0x20, 0x4A, 0x87),       // Blue
  70         QColor(0x4E, 0x9A, 0x06)        // Green
  71 };
  72
  73 const QPen AnalogSignal::AxisPen(QColor(0, 0, 0, 30 * 256 / 100), 2);
  74 const QColor AnalogSignal::GridMajorColor = QColor(0, 0, 0, 40 * 256 / 100);
  75 const QColor AnalogSignal::GridMinorColor = QColor(0, 0, 0, 20 * 256 / 100);
  76
  77 const QColor AnalogSignal::SamplingPointColour(0x77, 0x77, 0x77);
  78
  79 const QColor AnalogSignal::ThresholdColor = QColor(0, 0, 0, 30 * 256 / 100);
  80 const QColor AnalogSignal::ThresholdColorLo = QColor(255, 0, 0, 8 * 256 / 100);
  81 const QColor AnalogSignal::ThresholdColorNe = QColor(0,   0, 0, 6 * 256 / 100);
  82 const QColor AnalogSignal::ThresholdColorHi = QColor(0, 255, 0, 8 * 256 / 100);
  83
  84 const int64_t AnalogSignal::TracePaintBlockSize = 1024 * 1024;  // 4 MiB (due to float)
  85 const float AnalogSignal::EnvelopeThreshold = 64.0f;
  86
  87 const int AnalogSignal::MaximumVDivs = 10;
  88 const int AnalogSignal::MinScaleIndex = -6;
  89 const int AnalogSignal::MaxScaleIndex = 7;
  90
  91 const int AnalogSignal::InfoTextMarginRight = 20;
  92 const int AnalogSignal::InfoTextMarginBottom = 5;
  93
  94 AnalogSignal::AnalogSignal(
  95         pv::Session &session,
  96         shared_ptr<data::SignalBase> base) :
  97         Signal(session, base),
  98         scale_index_(4), // 20 per div
  99         scale_index_drag_offset_(0),
 100         pos_vdivs_(1),
 101         neg_vdivs_(1),
 102         resolution_(0),
 103         display_type_(DisplayBoth),
 104         autoranging_(true)
 105 {
 106         axis_pen_ = AxisPen;
 107
 108         pv::data::Analog* analog_data =
 109                 dynamic_cast<pv::data::Analog*>(data().get());
 110
 111         connect(analog_data, SIGNAL(min_max_changed(float, float)),
 112                 this, SLOT(on_min_max_changed(float, float)));
 113
 114         GlobalSettings gs;
 115         div_height_ = gs.value(GlobalSettings::Key_View_DefaultDivHeight).toInt();
 116
 117         base_->set_colour(SignalColours[base_->index() % countof(SignalColours)]);
 118         update_scale();
 119 }
 120
 121 shared_ptr<pv::data::SignalData> AnalogSignal::data() const
 122 {
 123         return base_->analog_data();
 124 }
 125
 126 void AnalogSignal::save_settings(QSettings &settings) const
 127 {
 128         settings.setValue("pos_vdivs", pos_vdivs_);
 129         settings.setValue("neg_vdivs", neg_vdivs_);
 130         settings.setValue("scale_index", scale_index_);
 131         settings.setValue("display_type", display_type_);
 132         settings.setValue("autoranging", autoranging_);
 133         settings.setValue("div_height", div_height_);
 134 }
 135
 136 void AnalogSignal::restore_settings(QSettings &settings)
 137 {
 138         if (settings.contains("pos_vdivs"))
 139                 pos_vdivs_ = settings.value("pos_vdivs").toInt();
 140
 141         if (settings.contains("neg_vdivs"))
 142                 neg_vdivs_ = settings.value("neg_vdivs").toInt();
 143
 144         if (settings.contains("scale_index")) {
 145                 scale_index_ = settings.value("scale_index").toInt();
 146                 update_scale();
 147         }
 148
 149         if (settings.contains("display_type"))
 150                 display_type_ = (DisplayType)(settings.value("display_type").toInt());
 151
 152         if (settings.contains("autoranging"))
 153                 autoranging_ = settings.value("autoranging").toBool();
 154
 155         if (settings.contains("div_height")) {
 156                 const int old_height = div_height_;
 157                 div_height_ = settings.value("div_height").toInt();
 158
 159                 if ((div_height_ != old_height) && owner_) {
 160                         // Call order is important, otherwise the lazy event handler won't work
 161                         owner_->extents_changed(false, true);
 162                         owner_->row_item_appearance_changed(false, true);
 163                 }
 164         }
 165 }
 166
 167 pair<int, int> AnalogSignal::v_extents() const
 168 {
 169         const int ph = pos_vdivs_ * div_height_;
 170         const int nh = neg_vdivs_ * div_height_;
 171         return make_pair(-ph, nh);
 172 }
 173
 174 int AnalogSignal::scale_handle_offset() const
 175 {
 176         const int h = (pos_vdivs_ + neg_vdivs_) * div_height_;
 177
 178         return ((scale_index_drag_offset_ - scale_index_) * h / 4) - h / 2;
 179 }
 180
 181 void AnalogSignal::scale_handle_dragged(int offset)
 182 {
 183         const int h = (pos_vdivs_ + neg_vdivs_) * div_height_;
 184
 185         scale_index_ = scale_index_drag_offset_ - (offset + h / 2) / (h / 4);
 186
 187         update_scale();
 188 }
 189
 190 void AnalogSignal::scale_handle_drag_release()
 191 {
 192         scale_index_drag_offset_ = scale_index_;
 193         update_scale();
 194 }
 195
 196 void AnalogSignal::paint_back(QPainter &p, ViewItemPaintParams &pp)
 197 {
 198         if (!base_->enabled())
 199                 return;
 200
 201         // TODO Register a change handler instead of querying this with every repaint
 202         GlobalSettings settings;
 203         const bool show_conversion_thresholds =
 204                 settings.value(GlobalSettings::Key_View_ShowConversionThresholds).toBool();
 205
 206         const vector<double> thresholds = base_->get_conversion_thresholds();
 207
 208         // Only display thresholds if we have some and we show analog samples
 209         if ((thresholds.size() > 0) && show_conversion_thresholds &&
 210                 ((display_type_ == DisplayAnalog) || (display_type_ == DisplayBoth))) {
 211
 212                 const int visual_y = get_visual_y();
 213                 const pair<int, int> extents = v_extents();
 214                 const int top = visual_y + extents.first;
 215                 const int btm = visual_y + extents.second;
 216
 217                 // Draw high/neutral/low areas
 218                 if (thresholds.size() == 2) {
 219                         const double thr_lo = visual_y - thresholds[0] * scale_;
 220                         const double thr_hi = visual_y - thresholds[1] * scale_;
 221
 222                         p.fillRect(QRectF(pp.left(), top, pp.width(), thr_hi - top),
 223                                 QBrush(ThresholdColorHi));
 224                         p.fillRect(QRectF(pp.left(), thr_hi, pp.width(), thr_lo - thr_hi),
 225                                 QBrush(ThresholdColorNe));
 226                         p.fillRect(QRectF(pp.left(), thr_lo, pp.width(), btm - thr_lo),
 227                                 QBrush(ThresholdColorLo));
 228                 } else {
 229                         const double thr = visual_y - thresholds[0] * scale_;
 230
 231                         p.fillRect(QRectF(pp.left(), top, pp.width(), thr - top),
 232                                 QBrush(ThresholdColorHi));
 233                         p.fillRect(QRectF(pp.left(), thr, pp.width(), btm - thr),
 234                                 QBrush(ThresholdColorLo));
 235                 }
 236
 237                 paint_axis(p, pp, get_visual_y());
 238         } else {
 239                 Trace::paint_back(p, pp);
 240                 paint_axis(p, pp, get_visual_y());
 241         }
 242 }
 243
 244 void AnalogSignal::paint_mid(QPainter &p, ViewItemPaintParams &pp)
 245 {
 246         assert(base_->analog_data());
 247         assert(owner_);
 248
 249         const int y = get_visual_y();
 250
 251         if (!base_->enabled())
 252                 return;
 253
 254         if ((display_type_ == DisplayAnalog) || (display_type_ == DisplayBoth)) {
 255                 paint_grid(p, y, pp.left(), pp.right());
 256
 257                 const deque< shared_ptr<pv::data::AnalogSegment> > &segments =
 258                         base_->analog_data()->analog_segments();
 259                 if (segments.empty())
 260                         return;
 261
 262                 const shared_ptr<pv::data::AnalogSegment> &segment =
 263                         segments.front();
 264
 265                 const double pixels_offset = pp.pixels_offset();
 266                 const double samplerate = max(1.0, segment->samplerate());
 267                 const pv::util::Timestamp& start_time = segment->start_time();
 268                 const int64_t last_sample = segment->get_sample_count() - 1;
 269                 const double samples_per_pixel = samplerate * pp.scale();
 270                 const pv::util::Timestamp start = samplerate * (pp.offset() - start_time);
 271                 const pv::util::Timestamp end = start + samples_per_pixel * pp.width();
 272
 273                 const int64_t start_sample = min(max(floor(start).convert_to<int64_t>(),
 274                         (int64_t)0), last_sample);
 275                 const int64_t end_sample = min(max((ceil(end) + 1).convert_to<int64_t>(),
 276                         (int64_t)0), last_sample);
 277
 278                 if (samples_per_pixel < EnvelopeThreshold)
 279                         paint_trace(p, segment, y, pp.left(),
 280                                 start_sample, end_sample,
 281                                 pixels_offset, samples_per_pixel);
 282                 else
 283                         paint_envelope(p, segment, y, pp.left(),
 284                                 start_sample, end_sample,
 285                                 pixels_offset, samples_per_pixel);
 286         }
 287
 288         if ((display_type_ == DisplayConverted) || (display_type_ == DisplayBoth))
 289                 paint_logic_mid(p, pp);
 290 }
 291
 292 void AnalogSignal::paint_fore(QPainter &p, ViewItemPaintParams &pp)
 293 {
 294         if (!enabled())
 295                 return;
 296
 297         if ((display_type_ == DisplayAnalog) || (display_type_ == DisplayBoth)) {
 298                 const int y = get_visual_y();
 299
 300                 // Show the info section on the right side of the trace
 301                 const QString infotext = QString("%1 V/div").arg(resolution_);
 302
 303                 p.setPen(base_->colour());
 304                 p.setFont(QApplication::font());
 305
 306                 const QRectF bounding_rect = QRectF(pp.left(),
 307                                 y + v_extents().first,
 308                                 pp.width() - InfoTextMarginRight,
 309                                 v_extents().second - v_extents().first - InfoTextMarginBottom);
 310
 311                 p.drawText(bounding_rect, Qt::AlignRight | Qt::AlignBottom, infotext);
 312         }
 313 }
 314
 315 void AnalogSignal::paint_grid(QPainter &p, int y, int left, int right)
 316 {
 317         p.setRenderHint(QPainter::Antialiasing, false);
 318
 319         GlobalSettings settings;
 320         const bool show_analog_minor_grid =
 321                 settings.value(GlobalSettings::Key_View_ShowAnalogMinorGrid).toBool();
 322
 323         if (pos_vdivs_ > 0) {
 324                 p.setPen(QPen(GridMajorColor, 1, Qt::DashLine));
 325                 for (int i = 1; i <= pos_vdivs_; i++) {
 326                         const float dy = i * div_height_;
 327                         p.drawLine(QLineF(left, y - dy, right, y - dy));
 328                 }
 329         }
 330
 331         if ((pos_vdivs_ > 0) && show_analog_minor_grid) {
 332                 p.setPen(QPen(GridMinorColor, 1, Qt::DashLine));
 333                 for (int i = 0; i < pos_vdivs_; i++) {
 334                         const float dy = i * div_height_;
 335                         const float dy25 = dy + (0.25 * div_height_);
 336                         const float dy50 = dy + (0.50 * div_height_);
 337                         const float dy75 = dy + (0.75 * div_height_);
 338                         p.drawLine(QLineF(left, y - dy25, right, y - dy25));
 339                         p.drawLine(QLineF(left, y - dy50, right, y - dy50));
 340                         p.drawLine(QLineF(left, y - dy75, right, y - dy75));
 341                 }
 342         }
 343
 344         if (neg_vdivs_ > 0) {
 345                 p.setPen(QPen(GridMajorColor, 1, Qt::DashLine));
 346                 for (int i = 1; i <= neg_vdivs_; i++) {
 347                         const float dy = i * div_height_;
 348                         p.drawLine(QLineF(left, y + dy, right, y + dy));
 349                 }
 350         }
 351
 352         if ((pos_vdivs_ > 0) && show_analog_minor_grid) {
 353                 p.setPen(QPen(GridMinorColor, 1, Qt::DashLine));
 354                 for (int i = 0; i < neg_vdivs_; i++) {
 355                         const float dy = i * div_height_;
 356                         const float dy25 = dy + (0.25 * div_height_);
 357                         const float dy50 = dy + (0.50 * div_height_);
 358                         const float dy75 = dy + (0.75 * div_height_);
 359                         p.drawLine(QLineF(left, y + dy25, right, y + dy25));
 360                         p.drawLine(QLineF(left, y + dy50, right, y + dy50));
 361                         p.drawLine(QLineF(left, y + dy75, right, y + dy75));
 362                 }
 363         }
 364
 365         p.setRenderHint(QPainter::Antialiasing, true);
 366 }
 367
 368 void AnalogSignal::paint_trace(QPainter &p,
 369         const shared_ptr<pv::data::AnalogSegment> &segment,
 370         int y, int left, const int64_t start, const int64_t end,
 371         const double pixels_offset, const double samples_per_pixel)
 372 {
 373         if (end <= start)
 374                 return;
 375
 376         // Calculate and paint the sampling points if enabled and useful
 377         GlobalSettings settings;
 378         const bool show_sampling_points =
 379                 settings.value(GlobalSettings::Key_View_ShowSamplingPoints).toBool() &&
 380                 (samples_per_pixel < 0.25);
 381
 382         p.setPen(base_->colour());
 383
 384         const int64_t points_count = end - start;
 385
 386         QPointF *points = new QPointF[points_count];
 387         QPointF *point = points;
 388
 389         QRectF *sampling_points = nullptr;
 390         if (show_sampling_points)
 391                  sampling_points = new QRectF[points_count];
 392         QRectF *sampling_point = sampling_points;
 393
 394         int64_t sample_count = min(points_count, TracePaintBlockSize);
 395         int64_t block_sample = 0;
 396         float *sample_block = new float[TracePaintBlockSize];
 397         segment->get_samples(start, start + sample_count, sample_block);
 398
 399         const int w = 2;
 400         for (int64_t sample = start; sample != end; sample++, block_sample++) {
 401
 402                 if (block_sample == TracePaintBlockSize) {
 403                         block_sample = 0;
 404                         sample_count = min(points_count - sample, TracePaintBlockSize);
 405                         segment->get_samples(sample, sample + sample_count, sample_block);
 406                 }
 407
 408                 const float x = (sample / samples_per_pixel -
 409                         pixels_offset) + left;
 410
 411                 *point++ = QPointF(x, y - sample_block[block_sample] * scale_);
 412
 413                 if (show_sampling_points)
 414                         *sampling_point++ =
 415                                 QRectF(x - (w / 2), y - sample_block[block_sample] * scale_ - (w / 2), w, w);
 416         }
 417         delete[] sample_block;
 418
 419         p.drawPolyline(points, points_count);
 420
 421         if (show_sampling_points) {
 422                 p.setPen(SamplingPointColour);
 423                 p.drawRects(sampling_points, points_count);
 424                 delete[] sampling_points;
 425         }
 426
 427         delete[] points;
 428 }
 429
 430 void AnalogSignal::paint_envelope(QPainter &p,
 431         const shared_ptr<pv::data::AnalogSegment> &segment,
 432         int y, int left, const int64_t start, const int64_t end,
 433         const double pixels_offset, const double samples_per_pixel)
 434 {
 435         using pv::data::AnalogSegment;
 436
 437         AnalogSegment::EnvelopeSection e;
 438         segment->get_envelope_section(e, start, end, samples_per_pixel);
 439
 440         if (e.length < 2)
 441                 return;
 442
 443         p.setPen(QPen(Qt::NoPen));
 444         p.setBrush(base_->colour());
 445
 446         QRectF *const rects = new QRectF[e.length];
 447         QRectF *rect = rects;
 448
 449         for (uint64_t sample = 0; sample < e.length - 1; sample++) {
 450                 const float x = ((e.scale * sample + e.start) /
 451                         samples_per_pixel - pixels_offset) + left;
 452                 const AnalogSegment::EnvelopeSample *const s =
 453                         e.samples + sample;
 454
 455                 // We overlap this sample with the next so that vertical
 456                 // gaps do not appear during steep rising or falling edges
 457                 const float b = y - max(s->max, (s + 1)->min) * scale_;
 458                 const float t = y - min(s->min, (s + 1)->max) * scale_;
 459
 460                 float h = b - t;
 461                 if (h >= 0.0f && h <= 1.0f)
 462                         h = 1.0f;
 463                 if (h <= 0.0f && h >= -1.0f)
 464                         h = -1.0f;
 465
 466                 *rect++ = QRectF(x, t, 1.0f, h);
 467         }
 468
 469         p.drawRects(rects, e.length);
 470
 471         delete[] rects;
 472         delete[] e.samples;
 473 }
 474
 475 void AnalogSignal::paint_logic_mid(QPainter &p, ViewItemPaintParams &pp)
 476 {
 477         QLineF *line;
 478
 479         vector< pair<int64_t, bool> > edges;
 480
 481         assert(base_);
 482
 483         const int y = get_visual_y();
 484
 485         if (!base_->enabled() || !base_->logic_data())
 486                 return;
 487
 488         const int signal_margin =
 489                 QFontMetrics(QApplication::font()).height() / 2;
 490
 491         const int ph = min(pos_vdivs_, 1) * div_height_;
 492         const int nh = min(neg_vdivs_, 1) * div_height_;
 493         const float high_offset = y - ph + signal_margin + 0.5f;
 494         const float low_offset = y + nh - signal_margin - 0.5f;
 495
 496         const deque< shared_ptr<pv::data::LogicSegment> > &segments =
 497                 base_->logic_data()->logic_segments();
 498
 499         if (segments.empty())
 500                 return;
 501
 502         const shared_ptr<pv::data::LogicSegment> &segment =
 503                 segments.front();
 504
 505         double samplerate = segment->samplerate();
 506
 507         // Show sample rate as 1Hz when it is unknown
 508         if (samplerate == 0.0)
 509                 samplerate = 1.0;
 510
 511         const double pixels_offset = pp.pixels_offset();
 512         const pv::util::Timestamp& start_time = segment->start_time();
 513         const int64_t last_sample = segment->get_sample_count() - 1;
 514         const double samples_per_pixel = samplerate * pp.scale();
 515         const double pixels_per_sample = 1 / samples_per_pixel;
 516         const pv::util::Timestamp start = samplerate * (pp.offset() - start_time);
 517         const pv::util::Timestamp end = start + samples_per_pixel * pp.width();
 518
 519         const int64_t start_sample = min(max(floor(start).convert_to<int64_t>(),
 520                 (int64_t)0), last_sample);
 521         const uint64_t end_sample = min(max(ceil(end).convert_to<int64_t>(),
 522                 (int64_t)0), last_sample);
 523
 524         segment->get_subsampled_edges(edges, start_sample, end_sample,
 525                 samples_per_pixel / LogicSignal::Oversampling, 0);
 526         assert(edges.size() >= 2);
 527
 528         // Check whether we need to paint the sampling points
 529         GlobalSettings settings;
 530         const bool show_sampling_points =
 531                 settings.value(GlobalSettings::Key_View_ShowSamplingPoints).toBool() &&
 532                 (samples_per_pixel < 0.25);
 533
 534         vector<QRectF> sampling_points;
 535         float sampling_point_x = 0.0f;
 536         int64_t sampling_point_sample = start_sample;
 537         const int w = 2;
 538
 539         if (show_sampling_points) {
 540                 sampling_points.reserve(end_sample - start_sample + 1);
 541                 sampling_point_x = (edges.cbegin()->first / samples_per_pixel - pixels_offset) + pp.left();
 542         }
 543
 544         // Paint the edges
 545         const unsigned int edge_count = edges.size() - 2;
 546         QLineF *const edge_lines = new QLineF[edge_count];
 547         line = edge_lines;
 548
 549         for (auto i = edges.cbegin() + 1; i != edges.cend() - 1; i++) {
 550                 const float x = ((*i).first / samples_per_pixel -
 551                         pixels_offset) + pp.left();
 552                 *line++ = QLineF(x, high_offset, x, low_offset);
 553
 554                 if (show_sampling_points)
 555                         while (sampling_point_sample < (*i).first) {
 556                                 const float y = (*i).second ? low_offset : high_offset;
 557                                 sampling_points.emplace_back(
 558                                         QRectF(sampling_point_x - (w / 2), y - (w / 2), w, w));
 559                                 sampling_point_sample++;
 560                                 sampling_point_x += pixels_per_sample;
 561                         };
 562         }
 563
 564         // Calculate the sample points from the last edge to the end of the trace
 565         if (show_sampling_points)
 566                 while ((uint64_t)sampling_point_sample <= end_sample) {
 567                         // Signal changed after the last edge, so the level is inverted
 568                         const float y = (edges.cend() - 1)->second ? high_offset : low_offset;
 569                         sampling_points.emplace_back(
 570                                 QRectF(sampling_point_x - (w / 2), y - (w / 2), w, w));
 571                         sampling_point_sample++;
 572                         sampling_point_x += pixels_per_sample;
 573                 };
 574
 575         p.setPen(LogicSignal::EdgeColour);
 576         p.drawLines(edge_lines, edge_count);
 577         delete[] edge_lines;
 578
 579         // Paint the caps
 580         const unsigned int max_cap_line_count = edges.size();
 581         QLineF *const cap_lines = new QLineF[max_cap_line_count];
 582
 583         p.setPen(LogicSignal::HighColour);
 584         paint_logic_caps(p, cap_lines, edges, true, samples_per_pixel,
 585                 pixels_offset, pp.left(), high_offset);
 586         p.setPen(LogicSignal::LowColour);
 587         paint_logic_caps(p, cap_lines, edges, false, samples_per_pixel,
 588                 pixels_offset, pp.left(), low_offset);
 589
 590         delete[] cap_lines;
 591
 592         // Paint the sampling points
 593         if (show_sampling_points) {
 594                 p.setPen(SamplingPointColour);
 595                 p.drawRects(sampling_points.data(), sampling_points.size());
 596         }
 597 }
 598
 599 void AnalogSignal::paint_logic_caps(QPainter &p, QLineF *const lines,
 600         vector< pair<int64_t, bool> > &edges, bool level,
 601         double samples_per_pixel, double pixels_offset, float x_offset,
 602         float y_offset)
 603 {
 604         QLineF *line = lines;
 605
 606         for (auto i = edges.begin(); i != (edges.end() - 1); i++)
 607                 if ((*i).second == level) {
 608                         *line++ = QLineF(
 609                                 ((*i).first / samples_per_pixel -
 610                                         pixels_offset) + x_offset, y_offset,
 611                                 ((*(i+1)).first / samples_per_pixel -
 612                                         pixels_offset) + x_offset, y_offset);
 613                 }
 614
 615         p.drawLines(lines, line - lines);
 616 }
 617
 618 float AnalogSignal::get_resolution(int scale_index)
 619 {
 620         const float seq[] = {1.0f, 2.0f, 5.0f};
 621
 622         const int offset = numeric_limits<int>::max() / (2 * countof(seq));
 623         const div_t d = div((int)(scale_index + countof(seq) * offset),
 624                 countof(seq));
 625
 626         return powf(10.0f, d.quot - offset) * seq[d.rem];
 627 }
 628
 629 void AnalogSignal::update_scale()
 630 {
 631         resolution_ = get_resolution(scale_index_);
 632         scale_ = div_height_ / resolution_;
 633 }
 634
 635 void AnalogSignal::update_conversion_widgets()
 636 {
 637         SignalBase::ConversionType conv_type = base_->get_conversion_type();
 638
 639         // Enable or disable widgets depending on conversion state
 640         conv_threshold_cb_->setEnabled(conv_type != SignalBase::NoConversion);
 641         display_type_cb_->setEnabled(conv_type != SignalBase::NoConversion);
 642
 643         conv_threshold_cb_->clear();
 644
 645         vector < pair<QString, int> > presets = base_->get_conversion_presets();
 646
 647         // Prevent the combo box from firing the "edit text changed" signal
 648         // as that would involuntarily select the first entry
 649         conv_threshold_cb_->blockSignals(true);
 650
 651         // Set available options depending on chosen conversion
 652         for (pair<QString, int> preset : presets)
 653                 conv_threshold_cb_->addItem(preset.first, preset.second);
 654
 655         map < QString, QVariant > options = base_->get_conversion_options();
 656
 657         if (conv_type == SignalBase::A2LConversionByThreshold) {
 658                 const vector<double> thresholds = base_->get_conversion_thresholds(
 659                                 SignalBase::A2LConversionByThreshold, true);
 660                 conv_threshold_cb_->addItem(
 661                                 QString("%1V").arg(QString::number(thresholds[0], 'f', 1)), -1);
 662         }
 663
 664         if (conv_type == SignalBase::A2LConversionBySchmittTrigger) {
 665                 const vector<double> thresholds = base_->get_conversion_thresholds(
 666                                 SignalBase::A2LConversionBySchmittTrigger, true);
 667                 conv_threshold_cb_->addItem(QString("%1V/%2V").arg(
 668                                 QString::number(thresholds[0], 'f', 1),
 669                                 QString::number(thresholds[1], 'f', 1)), -1);
 670         }
 671
 672         int preset_id = base_->get_current_conversion_preset();
 673         conv_threshold_cb_->setCurrentIndex(
 674                         conv_threshold_cb_->findData(preset_id));
 675
 676         conv_threshold_cb_->blockSignals(false);
 677 }
 678
 679 void AnalogSignal::perform_autoranging(bool keep_divs, bool force_update)
 680 {
 681         const deque< shared_ptr<pv::data::AnalogSegment> > &segments =
 682                 base_->analog_data()->analog_segments();
 683
 684         if (segments.empty())
 685                 return;
 686
 687         static double prev_min = 0, prev_max = 0;
 688         double min = 0, max = 0;
 689
 690         for (shared_ptr<pv::data::AnalogSegment> segment : segments) {
 691                 pair<double, double> mm = segment->get_min_max();
 692                 min = std::min(min, mm.first);
 693                 max = std::max(max, mm.second);
 694         }
 695
 696         if ((min == prev_min) && (max == prev_max) && !force_update)
 697                 return;
 698
 699         prev_min = min;
 700         prev_max = max;
 701
 702         // If we're allowed to alter the div assignment...
 703         if (!keep_divs) {
 704                 // Use all divs for the positive range if there are no negative values
 705                 if ((min == 0) && (neg_vdivs_ > 0)) {
 706                         pos_vdivs_ += neg_vdivs_;
 707                         neg_vdivs_ = 0;
 708                 }
 709
 710                 // Split up the divs if there are negative values but no negative divs
 711                 if ((min < 0) && (neg_vdivs_ == 0)) {
 712                         neg_vdivs_ = pos_vdivs_ / 2;
 713                         pos_vdivs_ -= neg_vdivs_;
 714                 }
 715         }
 716
 717         // If there is still no positive div when we need it, add one
 718         // (this can happen when pos_vdivs==neg_vdivs==0)
 719         if ((max > 0) && (pos_vdivs_ == 0)) {
 720                 pos_vdivs_ = 1;
 721                 owner_->extents_changed(false, true);
 722         }
 723
 724         // If there is still no negative div when we need it, add one
 725         // (this can happen when pos_vdivs was 0 or 1 when trying to split)
 726         if ((min < 0) && (neg_vdivs_ == 0)) {
 727                 neg_vdivs_ = 1;
 728                 owner_->extents_changed(false, true);
 729         }
 730
 731         double min_value_per_div;
 732         if ((pos_vdivs_ > 0) && (neg_vdivs_ >  0))
 733                 min_value_per_div = std::max(max / pos_vdivs_, -min / neg_vdivs_);
 734         else if (pos_vdivs_ > 0)
 735                 min_value_per_div = max / pos_vdivs_;
 736         else
 737                 min_value_per_div = -min / neg_vdivs_;
 738
 739         // Find first scale value that is bigger than the value we need
 740         for (int i = MinScaleIndex; i < MaxScaleIndex; i++)
 741                 if (get_resolution(i) > min_value_per_div) {
 742                         scale_index_ = i;
 743                         break;
 744                 }
 745
 746         update_scale();
 747 }
 748
 749 void AnalogSignal::populate_popup_form(QWidget *parent, QFormLayout *form)
 750 {
 751         // Add the standard options
 752         Signal::populate_popup_form(parent, form);
 753
 754         QFormLayout *const layout = new QFormLayout;
 755
 756         // Add div-related settings
 757         pvdiv_sb_ = new QSpinBox(parent);
 758         pvdiv_sb_->setRange(0, MaximumVDivs);
 759         pvdiv_sb_->setValue(pos_vdivs_);
 760         connect(pvdiv_sb_, SIGNAL(valueChanged(int)),
 761                 this, SLOT(on_pos_vdivs_changed(int)));
 762         layout->addRow(tr("Number of pos vertical divs"), pvdiv_sb_);
 763
 764         nvdiv_sb_ = new QSpinBox(parent);
 765         nvdiv_sb_->setRange(0, MaximumVDivs);
 766         nvdiv_sb_->setValue(neg_vdivs_);
 767         connect(nvdiv_sb_, SIGNAL(valueChanged(int)),
 768                 this, SLOT(on_neg_vdivs_changed(int)));
 769         layout->addRow(tr("Number of neg vertical divs"), nvdiv_sb_);
 770
 771         div_height_sb_ = new QSpinBox(parent);
 772         div_height_sb_->setRange(20, 1000);
 773         div_height_sb_->setSingleStep(5);
 774         div_height_sb_->setSuffix(tr(" pixels"));
 775         div_height_sb_->setValue(div_height_);
 776         connect(div_height_sb_, SIGNAL(valueChanged(int)),
 777                 this, SLOT(on_div_height_changed(int)));
 778         layout->addRow(tr("Div height"), div_height_sb_);
 779
 780         // Add the vertical resolution
 781         resolution_cb_ = new QComboBox(parent);
 782
 783         for (int i = MinScaleIndex; i < MaxScaleIndex; i++) {
 784                 const QString label = QString("%1").arg(get_resolution(i));
 785                 resolution_cb_->insertItem(0, label, QVariant(i));
 786         }
 787
 788         int cur_idx = resolution_cb_->findData(QVariant(scale_index_));
 789         resolution_cb_->setCurrentIndex(cur_idx);
 790
 791         connect(resolution_cb_, SIGNAL(currentIndexChanged(int)),
 792                 this, SLOT(on_resolution_changed(int)));
 793
 794         QGridLayout *const vdiv_layout = new QGridLayout;
 795         QLabel *const vdiv_unit = new QLabel(tr("V/div"));
 796         vdiv_layout->addWidget(resolution_cb_, 0, 0);
 797         vdiv_layout->addWidget(vdiv_unit, 0, 1);
 798
 799         layout->addRow(tr("Vertical resolution"), vdiv_layout);
 800
 801         // Add the autoranging checkbox
 802         QCheckBox* autoranging_cb = new QCheckBox();
 803         autoranging_cb->setCheckState(autoranging_ ? Qt::Checked : Qt::Unchecked);
 804
 805         connect(autoranging_cb, SIGNAL(stateChanged(int)),
 806                 this, SLOT(on_autoranging_changed(int)));
 807
 808         layout->addRow(tr("Autoranging"), autoranging_cb);
 809
 810         // Add the conversion type dropdown
 811         conversion_cb_ = new QComboBox();
 812
 813         conversion_cb_->addItem(tr("none"),
 814                 SignalBase::NoConversion);
 815         conversion_cb_->addItem(tr("to logic via threshold"),
 816                 SignalBase::A2LConversionByThreshold);
 817         conversion_cb_->addItem(tr("to logic via schmitt-trigger"),
 818                 SignalBase::A2LConversionBySchmittTrigger);
 819
 820         cur_idx = conversion_cb_->findData(QVariant(base_->get_conversion_type()));
 821         conversion_cb_->setCurrentIndex(cur_idx);
 822
 823         layout->addRow(tr("Conversion"), conversion_cb_);
 824
 825         connect(conversion_cb_, SIGNAL(currentIndexChanged(int)),
 826                 this, SLOT(on_conversion_changed(int)));
 827
 828     // Add the conversion threshold settings
 829     conv_threshold_cb_ = new QComboBox();
 830     conv_threshold_cb_->setEditable(true);
 831
 832     layout->addRow(tr("Conversion threshold(s)"), conv_threshold_cb_);
 833
 834     connect(conv_threshold_cb_, SIGNAL(currentIndexChanged(int)),
 835             this, SLOT(on_conv_threshold_changed(int)));
 836     connect(conv_threshold_cb_, SIGNAL(editTextChanged(const QString)),
 837             this, SLOT(on_conv_threshold_changed()));  // index will be -1
 838
 839         // Add the display type dropdown
 840         display_type_cb_ = new QComboBox();
 841
 842         display_type_cb_->addItem(tr("analog"), DisplayAnalog);
 843         display_type_cb_->addItem(tr("converted"), DisplayConverted);
 844         display_type_cb_->addItem(tr("analog+converted"), DisplayBoth);
 845
 846         cur_idx = display_type_cb_->findData(QVariant(display_type_));
 847         display_type_cb_->setCurrentIndex(cur_idx);
 848
 849         layout->addRow(tr("Show traces for"), display_type_cb_);
 850
 851         connect(display_type_cb_, SIGNAL(currentIndexChanged(int)),
 852                 this, SLOT(on_display_type_changed(int)));
 853
 854         // Update the conversion widget contents and states
 855         update_conversion_widgets();
 856
 857         form->addRow(layout);
 858 }
 859
 860 void AnalogSignal::on_min_max_changed(float min, float max)
 861 {
 862         (void)min;
 863         (void)max;
 864
 865         if (autoranging_)
 866                 perform_autoranging(false, false);
 867 }
 868
 869 void AnalogSignal::on_pos_vdivs_changed(int vdivs)
 870 {
 871         if (vdivs == pos_vdivs_)
 872                 return;
 873
 874         pos_vdivs_ = vdivs;
 875
 876         // There has to be at least one div, positive or negative
 877         if ((neg_vdivs_ == 0) && (pos_vdivs_ == 0)) {
 878                 pos_vdivs_ = 1;
 879                 if (pvdiv_sb_)
 880                         pvdiv_sb_->setValue(pos_vdivs_);
 881         }
 882
 883         if (autoranging_) {
 884                 perform_autoranging(true, true);
 885
 886                 // It could be that a positive or negative div was added, so update
 887                 if (pvdiv_sb_) {
 888                         pvdiv_sb_->setValue(pos_vdivs_);
 889                         nvdiv_sb_->setValue(neg_vdivs_);
 890                 }
 891         }
 892
 893         if (owner_) {
 894                 // Call order is important, otherwise the lazy event handler won't work
 895                 owner_->extents_changed(false, true);
 896                 owner_->row_item_appearance_changed(false, true);
 897         }
 898 }
 899
 900 void AnalogSignal::on_neg_vdivs_changed(int vdivs)
 901 {
 902         if (vdivs == neg_vdivs_)
 903                 return;
 904
 905         neg_vdivs_ = vdivs;
 906
 907         // There has to be at least one div, positive or negative
 908         if ((neg_vdivs_ == 0) && (pos_vdivs_ == 0)) {
 909                 pos_vdivs_ = 1;
 910                 if (pvdiv_sb_)
 911                         pvdiv_sb_->setValue(pos_vdivs_);
 912         }
 913
 914         if (autoranging_) {
 915                 perform_autoranging(true, true);
 916
 917                 // It could be that a positive or negative div was added, so update
 918                 if (pvdiv_sb_) {
 919                         pvdiv_sb_->setValue(pos_vdivs_);
 920                         nvdiv_sb_->setValue(neg_vdivs_);
 921                 }
 922         }
 923
 924         if (owner_) {
 925                 // Call order is important, otherwise the lazy event handler won't work
 926                 owner_->extents_changed(false, true);
 927                 owner_->row_item_appearance_changed(false, true);
 928         }
 929 }
 930
 931 void AnalogSignal::on_div_height_changed(int height)
 932 {
 933         div_height_ = height;
 934         update_scale();
 935
 936         if (owner_) {
 937                 // Call order is important, otherwise the lazy event handler won't work
 938                 owner_->extents_changed(false, true);
 939                 owner_->row_item_appearance_changed(false, true);
 940         }
 941 }
 942
 943 void AnalogSignal::on_resolution_changed(int index)
 944 {
 945         scale_index_ = resolution_cb_->itemData(index).toInt();
 946         update_scale();
 947
 948         if (owner_)
 949                 owner_->row_item_appearance_changed(false, true);
 950 }
 951
 952 void AnalogSignal::on_autoranging_changed(int state)
 953 {
 954         autoranging_ = (state == Qt::Checked);
 955
 956         if (autoranging_)
 957                 perform_autoranging(false, true);
 958
 959         if (owner_) {
 960                 // Call order is important, otherwise the lazy event handler won't work
 961                 owner_->extents_changed(false, true);
 962                 owner_->row_item_appearance_changed(false, true);
 963         }
 964 }
 965
 966 void AnalogSignal::on_conversion_changed(int index)
 967 {
 968         SignalBase::ConversionType old_conv_type = base_->get_conversion_type();
 969
 970         SignalBase::ConversionType conv_type =
 971                 (SignalBase::ConversionType)(conversion_cb_->itemData(index).toInt());
 972
 973         if (conv_type != old_conv_type) {
 974                 base_->set_conversion_type(conv_type);
 975                 update_conversion_widgets();
 976
 977                 if (owner_)
 978                         owner_->row_item_appearance_changed(false, true);
 979         }
 980 }
 981
 982 void AnalogSignal::on_conv_threshold_changed(int index)
 983 {
 984         SignalBase::ConversionType conv_type = base_->get_conversion_type();
 985
 986         // Note: index is set to -1 if the text in the combo box matches none of
 987         // the entries in the combo box
 988
 989         if ((index == -1) && (conv_threshold_cb_->currentText().length() == 0))
 990                 return;
 991
 992         // The combo box entry with the custom value has user_data set to -1
 993         const int user_data = conv_threshold_cb_->findText(
 994                         conv_threshold_cb_->currentText());
 995
 996         const bool use_custom_thr = (index == -1) || (user_data == -1);
 997
 998         if (conv_type == SignalBase::A2LConversionByThreshold && use_custom_thr) {
 999                 // Not one of the preset values, try to parse the combo box text
1000                 // Note: Regex loosely based on
1001                 // https://txt2re.com/index-c++.php3?s=0.1V&1&-13
1002                 QString re1 = "([+-]?\\d*[\\.,]?\\d*)"; // Float value
1003                 QString re2 = "([a-zA-Z]*)"; // SI unit
1004                 QRegExp regex(re1 + re2);
1005
1006                 const QString text = conv_threshold_cb_->currentText();
1007                 if (!regex.exactMatch(text))
1008                         return;  // String doesn't match the regex
1009
1010                 QStringList tokens = regex.capturedTexts();
1011
1012                 // For now, we simply assume that the unit is volt without modifiers
1013                 const double thr = tokens.at(1).toDouble();
1014
1015                 // Only restart the conversion if the threshold was updated.
1016                 // We're starting a delayed conversion because the user may still be
1017                 // typing and the UI would lag if we kept on restarting it immediately
1018                 if (base_->set_conversion_option("threshold_value", thr))
1019                         base_->start_conversion(true);
1020         }
1021
1022         if (conv_type == SignalBase::A2LConversionBySchmittTrigger && use_custom_thr) {
1023                 // Not one of the preset values, try to parse the combo box text
1024                 // Note: Regex loosely based on
1025                 // https://txt2re.com/index-c++.php3?s=0.1V/0.2V&2&14&-22&3&15
1026                 QString re1 = "([+-]?\\d*[\\.,]?\\d*)"; // Float value
1027                 QString re2 = "([a-zA-Z]*)"; // SI unit
1028                 QString re3 = "\\/"; // Forward slash, not captured
1029                 QString re4 = "([+-]?\\d*[\\.,]?\\d*)"; // Float value
1030                 QString re5 = "([a-zA-Z]*)"; // SI unit
1031                 QRegExp regex(re1 + re2 + re3 + re4 + re5);
1032
1033                 const QString text = conv_threshold_cb_->currentText();
1034                 if (!regex.exactMatch(text))
1035                         return;  // String doesn't match the regex
1036
1037                 QStringList tokens = regex.capturedTexts();
1038
1039                 // For now, we simply assume that the unit is volt without modifiers
1040                 const double low_thr = tokens.at(1).toDouble();
1041                 const double high_thr = tokens.at(3).toDouble();
1042
1043                 // Only restart the conversion if one of the options was updated.
1044                 // We're starting a delayed conversion because the user may still be
1045                 // typing and the UI would lag if we kept on restarting it immediately
1046                 bool o1 = base_->set_conversion_option("threshold_value_low", low_thr);
1047                 bool o2 = base_->set_conversion_option("threshold_value_high", high_thr);
1048                 if (o1 || o2)
1049                         base_->start_conversion(true);  // Start delayed conversion
1050         }
1051
1052         base_->set_conversion_preset((SignalBase::ConversionPreset)index);
1053
1054         // Immediately start the conversion if we're not using custom values
1055         // (i.e. we're using one of the presets)
1056         if (!use_custom_thr)
1057                 base_->start_conversion();
1058 }
1059
1060 void AnalogSignal::on_delayed_conversion_starter()
1061 {
1062         base_->start_conversion();
1063 }
1064
1065 void AnalogSignal::on_display_type_changed(int index)
1066 {
1067         display_type_ = (DisplayType)(display_type_cb_->itemData(index).toInt());
1068
1069         if (owner_)
1070                 owner_->row_item_appearance_changed(false, true);
1071 }
1072
1073 } // namespace trace
1074 } // namespace views
1075 } // namespace pv