pv/views/trace/analogsignal.cpp

   1 /*
   2  * This file is part of the PulseView project.
   3  *
   4  * Copyright (C) 2012 Joel Holdsworth <joel@airwebreathe.org.uk>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 #include <extdef.h>
  21
  22 #include <cassert>
  23 #include <cmath>
  24 #include <cstdlib>
  25 #include <limits>
  26 #include <vector>
  27
  28 #include <QApplication>
  29 #include <QCheckBox>
  30 #include <QComboBox>
  31 #include <QFormLayout>
  32 #include <QGridLayout>
  33 #include <QLabel>
  34 #include <QString>
  35
  36 #include "analogsignal.hpp"
  37 #include "logicsignal.hpp"
  38 #include "view.hpp"
  39
  40 #include "pv/data/analog.hpp"
  41 #include "pv/data/analogsegment.hpp"
  42 #include "pv/data/logic.hpp"
  43 #include "pv/data/logicsegment.hpp"
  44 #include "pv/data/signalbase.hpp"
  45 #include "pv/globalsettings.hpp"
  46
  47 #include <libsigrokcxx/libsigrokcxx.hpp>
  48
  49 using std::deque;
  50 using std::div;
  51 using std::div_t;
  52 using std::max;
  53 using std::make_pair;
  54 using std::min;
  55 using std::numeric_limits;
  56 using std::pair;
  57 using std::shared_ptr;
  58 using std::vector;
  59
  60 namespace pv {
  61 namespace views {
  62 namespace trace {
  63
  64 const QColor AnalogSignal::SignalColours[4] = {
  65         QColor(0xC4, 0xA0, 0x00),       // Yellow
  66         QColor(0x87, 0x20, 0x7A),       // Magenta
  67         QColor(0x20, 0x4A, 0x87),       // Blue
  68         QColor(0x4E, 0x9A, 0x06)        // Green
  69 };
  70
  71 const QColor AnalogSignal::GridMajorColor = QColor(0, 0, 0, 40 * 256 / 100);
  72 const QColor AnalogSignal::GridMinorColor = QColor(0, 0, 0, 20 * 256 / 100);
  73
  74 const QColor AnalogSignal::SamplingPointColour(0x77, 0x77, 0x77);
  75
  76 const int64_t AnalogSignal::TracePaintBlockSize = 1024 * 1024;  // 4 MiB (due to float)
  77 const float AnalogSignal::EnvelopeThreshold = 64.0f;
  78
  79 const int AnalogSignal::MaximumVDivs = 10;
  80 const int AnalogSignal::MinScaleIndex = -6;
  81 const int AnalogSignal::MaxScaleIndex = 7;
  82
  83 const int AnalogSignal::InfoTextMarginRight = 20;
  84 const int AnalogSignal::InfoTextMarginBottom = 5;
  85
  86 AnalogSignal::AnalogSignal(
  87         pv::Session &session,
  88         shared_ptr<data::SignalBase> base) :
  89         Signal(session, base),
  90         scale_index_(4), // 20 per div
  91         scale_index_drag_offset_(0),
  92         pos_vdivs_(1),
  93         neg_vdivs_(1),
  94         resolution_(0),
  95         display_type_(DisplayBoth),
  96         autoranging_(true)
  97 {
  98         pv::data::Analog* analog_data =
  99                 dynamic_cast<pv::data::Analog*>(data().get());
 100
 101         connect(analog_data, SIGNAL(samples_added(QObject*, uint64_t, uint64_t)),
 102                 this, SLOT(on_samples_added()));
 103
 104         GlobalSettings gs;
 105         div_height_ = gs.value(GlobalSettings::Key_View_DefaultDivHeight).toInt();
 106
 107         base_->set_colour(SignalColours[base_->index() % countof(SignalColours)]);
 108         update_scale();
 109 }
 110
 111 shared_ptr<pv::data::SignalData> AnalogSignal::data() const
 112 {
 113         return base_->analog_data();
 114 }
 115
 116 void AnalogSignal::save_settings(QSettings &settings) const
 117 {
 118         settings.setValue("pos_vdivs", pos_vdivs_);
 119         settings.setValue("neg_vdivs", neg_vdivs_);
 120         settings.setValue("scale_index", scale_index_);
 121         settings.setValue("display_type", display_type_);
 122         settings.setValue("autoranging", autoranging_);
 123         settings.setValue("div_height", div_height_);
 124 }
 125
 126 void AnalogSignal::restore_settings(QSettings &settings)
 127 {
 128         if (settings.contains("pos_vdivs"))
 129                 pos_vdivs_ = settings.value("pos_vdivs").toInt();
 130
 131         if (settings.contains("neg_vdivs"))
 132                 neg_vdivs_ = settings.value("neg_vdivs").toInt();
 133
 134         if (settings.contains("scale_index")) {
 135                 scale_index_ = settings.value("scale_index").toInt();
 136                 update_scale();
 137         }
 138
 139         if (settings.contains("display_type"))
 140                 display_type_ = (DisplayType)(settings.value("display_type").toInt());
 141
 142         if (settings.contains("autoranging"))
 143                 autoranging_ = settings.value("autoranging").toBool();
 144
 145         if (settings.contains("div_height")) {
 146                 const int old_height = div_height_;
 147                 div_height_ = settings.value("div_height").toInt();
 148
 149                 if ((div_height_ != old_height) && owner_) {
 150                         // Call order is important, otherwise the lazy event handler won't work
 151                         owner_->extents_changed(false, true);
 152                         owner_->row_item_appearance_changed(false, true);
 153                 }
 154         }
 155 }
 156
 157 pair<int, int> AnalogSignal::v_extents() const
 158 {
 159         const int ph = pos_vdivs_ * div_height_;
 160         const int nh = neg_vdivs_ * div_height_;
 161         return make_pair(-ph, nh);
 162 }
 163
 164 int AnalogSignal::scale_handle_offset() const
 165 {
 166         const int h = (pos_vdivs_ + neg_vdivs_) * div_height_;
 167
 168         return ((scale_index_drag_offset_ - scale_index_) * h / 4) - h / 2;
 169 }
 170
 171 void AnalogSignal::scale_handle_dragged(int offset)
 172 {
 173         const int h = (pos_vdivs_ + neg_vdivs_) * div_height_;
 174
 175         scale_index_ = scale_index_drag_offset_ - (offset + h / 2) / (h / 4);
 176
 177         update_scale();
 178 }
 179
 180 void AnalogSignal::scale_handle_drag_release()
 181 {
 182         scale_index_drag_offset_ = scale_index_;
 183         update_scale();
 184 }
 185
 186 void AnalogSignal::paint_back(QPainter &p, ViewItemPaintParams &pp)
 187 {
 188         if (base_->enabled()) {
 189                 Trace::paint_back(p, pp);
 190                 paint_axis(p, pp, get_visual_y());
 191         }
 192 }
 193
 194 void AnalogSignal::paint_mid(QPainter &p, ViewItemPaintParams &pp)
 195 {
 196         assert(base_->analog_data());
 197         assert(owner_);
 198
 199         const int y = get_visual_y();
 200
 201         if (!base_->enabled())
 202                 return;
 203
 204         if ((display_type_ == DisplayAnalog) || (display_type_ == DisplayBoth)) {
 205                 paint_grid(p, y, pp.left(), pp.right());
 206
 207                 const deque< shared_ptr<pv::data::AnalogSegment> > &segments =
 208                         base_->analog_data()->analog_segments();
 209                 if (segments.empty())
 210                         return;
 211
 212                 const shared_ptr<pv::data::AnalogSegment> &segment =
 213                         segments.front();
 214
 215                 const double pixels_offset = pp.pixels_offset();
 216                 const double samplerate = max(1.0, segment->samplerate());
 217                 const pv::util::Timestamp& start_time = segment->start_time();
 218                 const int64_t last_sample = segment->get_sample_count() - 1;
 219                 const double samples_per_pixel = samplerate * pp.scale();
 220                 const pv::util::Timestamp start = samplerate * (pp.offset() - start_time);
 221                 const pv::util::Timestamp end = start + samples_per_pixel * pp.width();
 222
 223                 const int64_t start_sample = min(max(floor(start).convert_to<int64_t>(),
 224                         (int64_t)0), last_sample);
 225                 const int64_t end_sample = min(max((ceil(end) + 1).convert_to<int64_t>(),
 226                         (int64_t)0), last_sample);
 227
 228                 if (samples_per_pixel < EnvelopeThreshold)
 229                         paint_trace(p, segment, y, pp.left(),
 230                                 start_sample, end_sample,
 231                                 pixels_offset, samples_per_pixel);
 232                 else
 233                         paint_envelope(p, segment, y, pp.left(),
 234                                 start_sample, end_sample,
 235                                 pixels_offset, samples_per_pixel);
 236         }
 237
 238         if ((display_type_ == DisplayConverted) || (display_type_ == DisplayBoth)) {
 239                 const data::SignalBase::ConversionType conv_type =
 240                         base_->get_conversion_type();
 241
 242                 if (((conv_type == data::SignalBase::A2LConversionByTreshold) ||
 243                         (conv_type == data::SignalBase::A2LConversionBySchmittTrigger))) {
 244
 245                         paint_logic_mid(p, pp);
 246                 }
 247         }
 248 }
 249
 250 void AnalogSignal::paint_fore(QPainter &p, ViewItemPaintParams &pp)
 251 {
 252         if (!enabled())
 253                 return;
 254
 255         if ((display_type_ == DisplayAnalog) || (display_type_ == DisplayBoth)) {
 256                 const int y = get_visual_y();
 257
 258                 // Show the info section on the right side of the trace
 259                 const QString infotext = QString("%1 V/div").arg(resolution_);
 260
 261                 p.setPen(base_->colour());
 262                 p.setFont(QApplication::font());
 263
 264                 const QRectF bounding_rect = QRectF(pp.left(),
 265                                 y + v_extents().first,
 266                                 pp.width() - InfoTextMarginRight,
 267                                 v_extents().second - v_extents().first - InfoTextMarginBottom);
 268
 269                 p.drawText(bounding_rect, Qt::AlignRight | Qt::AlignBottom, infotext);
 270         }
 271 }
 272
 273 void AnalogSignal::paint_grid(QPainter &p, int y, int left, int right)
 274 {
 275         p.setRenderHint(QPainter::Antialiasing, false);
 276
 277         GlobalSettings settings;
 278         const bool show_analog_minor_grid =
 279                 settings.value(GlobalSettings::Key_View_ShowAnalogMinorGrid).toBool();
 280
 281         if (pos_vdivs_ > 0) {
 282                 p.setPen(QPen(GridMajorColor, 1, Qt::DashLine));
 283                 for (int i = 1; i <= pos_vdivs_; i++) {
 284                         const float dy = i * div_height_;
 285                         p.drawLine(QLineF(left, y - dy, right, y - dy));
 286                 }
 287         }
 288
 289         if ((pos_vdivs_ > 0) && show_analog_minor_grid) {
 290                 p.setPen(QPen(GridMinorColor, 1, Qt::DashLine));
 291                 for (int i = 0; i < pos_vdivs_; i++) {
 292                         const float dy = i * div_height_;
 293                         const float dy25 = dy + (0.25 * div_height_);
 294                         const float dy50 = dy + (0.50 * div_height_);
 295                         const float dy75 = dy + (0.75 * div_height_);
 296                         p.drawLine(QLineF(left, y - dy25, right, y - dy25));
 297                         p.drawLine(QLineF(left, y - dy50, right, y - dy50));
 298                         p.drawLine(QLineF(left, y - dy75, right, y - dy75));
 299                 }
 300         }
 301
 302         if (neg_vdivs_ > 0) {
 303                 p.setPen(QPen(GridMajorColor, 1, Qt::DashLine));
 304                 for (int i = 1; i <= neg_vdivs_; i++) {
 305                         const float dy = i * div_height_;
 306                         p.drawLine(QLineF(left, y + dy, right, y + dy));
 307                 }
 308         }
 309
 310         if ((pos_vdivs_ > 0) && show_analog_minor_grid) {
 311                 p.setPen(QPen(GridMinorColor, 1, Qt::DashLine));
 312                 for (int i = 0; i < neg_vdivs_; i++) {
 313                         const float dy = i * div_height_;
 314                         const float dy25 = dy + (0.25 * div_height_);
 315                         const float dy50 = dy + (0.50 * div_height_);
 316                         const float dy75 = dy + (0.75 * div_height_);
 317                         p.drawLine(QLineF(left, y + dy25, right, y + dy25));
 318                         p.drawLine(QLineF(left, y + dy50, right, y + dy50));
 319                         p.drawLine(QLineF(left, y + dy75, right, y + dy75));
 320                 }
 321         }
 322
 323         p.setRenderHint(QPainter::Antialiasing, true);
 324 }
 325
 326 void AnalogSignal::paint_trace(QPainter &p,
 327         const shared_ptr<pv::data::AnalogSegment> &segment,
 328         int y, int left, const int64_t start, const int64_t end,
 329         const double pixels_offset, const double samples_per_pixel)
 330 {
 331         if (end <= start)
 332                 return;
 333
 334         // Calculate and paint the sampling points if enabled and useful
 335         GlobalSettings settings;
 336         const bool show_sampling_points =
 337                 settings.value(GlobalSettings::Key_View_ShowSamplingPoints).toBool() &&
 338                 (samples_per_pixel < 0.25);
 339
 340         p.setPen(base_->colour());
 341
 342         const int64_t points_count = end - start;
 343
 344         QPointF *points = new QPointF[points_count];
 345         QPointF *point = points;
 346
 347         QRectF *sampling_points = nullptr;
 348         if (show_sampling_points)
 349                  sampling_points = new QRectF[points_count];
 350         QRectF *sampling_point = sampling_points;
 351
 352         int64_t sample_count = min(points_count, TracePaintBlockSize);
 353         int64_t block_sample = 0;
 354         float *sample_block = new float[TracePaintBlockSize];
 355         segment->get_samples(start, start + sample_count, sample_block);
 356
 357         const int w = 2;
 358         for (int64_t sample = start; sample != end; sample++, block_sample++) {
 359
 360                 if (block_sample == TracePaintBlockSize) {
 361                         block_sample = 0;
 362                         sample_count = min(points_count - sample, TracePaintBlockSize);
 363                         segment->get_samples(sample, sample + sample_count, sample_block);
 364                 }
 365
 366                 const float x = (sample / samples_per_pixel -
 367                         pixels_offset) + left;
 368
 369                 *point++ = QPointF(x, y - sample_block[block_sample] * scale_);
 370
 371                 if (show_sampling_points)
 372                         *sampling_point++ =
 373                                 QRectF(x - (w / 2), y - sample_block[block_sample] * scale_ - (w / 2), w, w);
 374         }
 375         delete[] sample_block;
 376
 377         p.drawPolyline(points, points_count);
 378
 379         if (show_sampling_points) {
 380                 p.setPen(SamplingPointColour);
 381                 p.drawRects(sampling_points, points_count);
 382                 delete[] sampling_points;
 383         }
 384
 385         delete[] points;
 386 }
 387
 388 void AnalogSignal::paint_envelope(QPainter &p,
 389         const shared_ptr<pv::data::AnalogSegment> &segment,
 390         int y, int left, const int64_t start, const int64_t end,
 391         const double pixels_offset, const double samples_per_pixel)
 392 {
 393         using pv::data::AnalogSegment;
 394
 395         AnalogSegment::EnvelopeSection e;
 396         segment->get_envelope_section(e, start, end, samples_per_pixel);
 397
 398         if (e.length < 2)
 399                 return;
 400
 401         p.setPen(QPen(Qt::NoPen));
 402         p.setBrush(base_->colour());
 403
 404         QRectF *const rects = new QRectF[e.length];
 405         QRectF *rect = rects;
 406
 407         for (uint64_t sample = 0; sample < e.length - 1; sample++) {
 408                 const float x = ((e.scale * sample + e.start) /
 409                         samples_per_pixel - pixels_offset) + left;
 410                 const AnalogSegment::EnvelopeSample *const s =
 411                         e.samples + sample;
 412
 413                 // We overlap this sample with the next so that vertical
 414                 // gaps do not appear during steep rising or falling edges
 415                 const float b = y - max(s->max, (s + 1)->min) * scale_;
 416                 const float t = y - min(s->min, (s + 1)->max) * scale_;
 417
 418                 float h = b - t;
 419                 if (h >= 0.0f && h <= 1.0f)
 420                         h = 1.0f;
 421                 if (h <= 0.0f && h >= -1.0f)
 422                         h = -1.0f;
 423
 424                 *rect++ = QRectF(x, t, 1.0f, h);
 425         }
 426
 427         p.drawRects(rects, e.length);
 428
 429         delete[] rects;
 430         delete[] e.samples;
 431 }
 432
 433 void AnalogSignal::paint_logic_mid(QPainter &p, ViewItemPaintParams &pp)
 434 {
 435         QLineF *line;
 436
 437         vector< pair<int64_t, bool> > edges;
 438
 439         assert(base_);
 440
 441         const int y = get_visual_y();
 442
 443         if (!base_->enabled() || !base_->logic_data())
 444                 return;
 445
 446         const int signal_margin =
 447                 QFontMetrics(QApplication::font()).height() / 2;
 448
 449         const int ph = min(pos_vdivs_, 1) * div_height_;
 450         const int nh = min(neg_vdivs_, 1) * div_height_;
 451         const float high_offset = y - ph + signal_margin + 0.5f;
 452         const float low_offset = y + nh - signal_margin - 0.5f;
 453
 454         const deque< shared_ptr<pv::data::LogicSegment> > &segments =
 455                 base_->logic_data()->logic_segments();
 456
 457         if (segments.empty())
 458                 return;
 459
 460         const shared_ptr<pv::data::LogicSegment> &segment =
 461                 segments.front();
 462
 463         double samplerate = segment->samplerate();
 464
 465         // Show sample rate as 1Hz when it is unknown
 466         if (samplerate == 0.0)
 467                 samplerate = 1.0;
 468
 469         const double pixels_offset = pp.pixels_offset();
 470         const pv::util::Timestamp& start_time = segment->start_time();
 471         const int64_t last_sample = segment->get_sample_count() - 1;
 472         const double samples_per_pixel = samplerate * pp.scale();
 473         const double pixels_per_sample = 1 / samples_per_pixel;
 474         const pv::util::Timestamp start = samplerate * (pp.offset() - start_time);
 475         const pv::util::Timestamp end = start + samples_per_pixel * pp.width();
 476
 477         const int64_t start_sample = min(max(floor(start).convert_to<int64_t>(),
 478                 (int64_t)0), last_sample);
 479         const uint64_t end_sample = min(max(ceil(end).convert_to<int64_t>(),
 480                 (int64_t)0), last_sample);
 481
 482         segment->get_subsampled_edges(edges, start_sample, end_sample,
 483                 samples_per_pixel / LogicSignal::Oversampling, 0);
 484         assert(edges.size() >= 2);
 485
 486         // Check whether we need to paint the sampling points
 487         GlobalSettings settings;
 488         const bool show_sampling_points =
 489                 settings.value(GlobalSettings::Key_View_ShowSamplingPoints).toBool() &&
 490                 (samples_per_pixel < 0.25);
 491
 492         vector<QRectF> sampling_points;
 493         float sampling_point_x = 0.0f;
 494         int64_t sampling_point_sample = start_sample;
 495         const int w = 2;
 496
 497         if (show_sampling_points) {
 498                 sampling_points.reserve(end_sample - start_sample + 1);
 499                 sampling_point_x = (edges.cbegin()->first / samples_per_pixel - pixels_offset) + pp.left();
 500         }
 501
 502         // Paint the edges
 503         const unsigned int edge_count = edges.size() - 2;
 504         QLineF *const edge_lines = new QLineF[edge_count];
 505         line = edge_lines;
 506
 507         for (auto i = edges.cbegin() + 1; i != edges.cend() - 1; i++) {
 508                 const float x = ((*i).first / samples_per_pixel -
 509                         pixels_offset) + pp.left();
 510                 *line++ = QLineF(x, high_offset, x, low_offset);
 511
 512                 if (show_sampling_points)
 513                         while (sampling_point_sample < (*i).first) {
 514                                 const float y = (*i).second ? low_offset : high_offset;
 515                                 sampling_points.emplace_back(
 516                                         QRectF(sampling_point_x - (w / 2), y - (w / 2), w, w));
 517                                 sampling_point_sample++;
 518                                 sampling_point_x += pixels_per_sample;
 519                         };
 520         }
 521
 522         // Calculate the sample points from the last edge to the end of the trace
 523         if (show_sampling_points)
 524                 while ((uint64_t)sampling_point_sample <= end_sample) {
 525                         // Signal changed after the last edge, so the level is inverted
 526                         const float y = (edges.cend() - 1)->second ? high_offset : low_offset;
 527                         sampling_points.emplace_back(
 528                                 QRectF(sampling_point_x - (w / 2), y - (w / 2), w, w));
 529                         sampling_point_sample++;
 530                         sampling_point_x += pixels_per_sample;
 531                 };
 532
 533         p.setPen(LogicSignal::EdgeColour);
 534         p.drawLines(edge_lines, edge_count);
 535         delete[] edge_lines;
 536
 537         // Paint the caps
 538         const unsigned int max_cap_line_count = edges.size();
 539         QLineF *const cap_lines = new QLineF[max_cap_line_count];
 540
 541         p.setPen(LogicSignal::HighColour);
 542         paint_logic_caps(p, cap_lines, edges, true, samples_per_pixel,
 543                 pixels_offset, pp.left(), high_offset);
 544         p.setPen(LogicSignal::LowColour);
 545         paint_logic_caps(p, cap_lines, edges, false, samples_per_pixel,
 546                 pixels_offset, pp.left(), low_offset);
 547
 548         delete[] cap_lines;
 549
 550         // Paint the sampling points
 551         if (show_sampling_points) {
 552                 p.setPen(SamplingPointColour);
 553                 p.drawRects(sampling_points.data(), sampling_points.size());
 554         }
 555 }
 556
 557 void AnalogSignal::paint_logic_caps(QPainter &p, QLineF *const lines,
 558         vector< pair<int64_t, bool> > &edges, bool level,
 559         double samples_per_pixel, double pixels_offset, float x_offset,
 560         float y_offset)
 561 {
 562         QLineF *line = lines;
 563
 564         for (auto i = edges.begin(); i != (edges.end() - 1); i++)
 565                 if ((*i).second == level) {
 566                         *line++ = QLineF(
 567                                 ((*i).first / samples_per_pixel -
 568                                         pixels_offset) + x_offset, y_offset,
 569                                 ((*(i+1)).first / samples_per_pixel -
 570                                         pixels_offset) + x_offset, y_offset);
 571                 }
 572
 573         p.drawLines(lines, line - lines);
 574 }
 575
 576 float AnalogSignal::get_resolution(int scale_index)
 577 {
 578         const float seq[] = {1.0f, 2.0f, 5.0f};
 579
 580         const int offset = numeric_limits<int>::max() / (2 * countof(seq));
 581         const div_t d = div((int)(scale_index + countof(seq) * offset),
 582                 countof(seq));
 583
 584         return powf(10.0f, d.quot - offset) * seq[d.rem];
 585 }
 586
 587 void AnalogSignal::update_scale()
 588 {
 589         resolution_ = get_resolution(scale_index_);
 590         scale_ = div_height_ / resolution_;
 591 }
 592
 593 void AnalogSignal::perform_autoranging(bool keep_divs, bool force_update)
 594 {
 595         const deque< shared_ptr<pv::data::AnalogSegment> > &segments =
 596                 base_->analog_data()->analog_segments();
 597
 598         if (segments.empty())
 599                 return;
 600
 601         static double prev_min = 0, prev_max = 0;
 602         double min = 0, max = 0;
 603
 604         for (shared_ptr<pv::data::AnalogSegment> segment : segments) {
 605                 pair<double, double> mm = segment->get_min_max();
 606                 min = std::min(min, mm.first);
 607                 max = std::max(max, mm.second);
 608         }
 609
 610         if ((min == prev_min) && (max == prev_max) && !force_update)
 611                 return;
 612
 613         prev_min = min;
 614         prev_max = max;
 615
 616         // If we're allowed to alter the div assignment...
 617         if (!keep_divs) {
 618                 // Use all divs for the positive range if there are no negative values
 619                 if ((min == 0) && (neg_vdivs_ > 0)) {
 620                         pos_vdivs_ += neg_vdivs_;
 621                         neg_vdivs_ = 0;
 622                 }
 623
 624                 // Split up the divs if there are negative values but no negative divs
 625                 if ((min < 0) && (neg_vdivs_ == 0)) {
 626                         neg_vdivs_ = pos_vdivs_ / 2;
 627                         pos_vdivs_ -= neg_vdivs_;
 628                 }
 629         }
 630
 631         // If there is still no positive div when we need it, add one
 632         // (this can happen when pos_vdivs==neg_vdivs==0)
 633         if ((max > 0) && (pos_vdivs_ == 0)) {
 634                 pos_vdivs_ = 1;
 635                 owner_->extents_changed(false, true);
 636         }
 637
 638         // If there is still no negative div when we need it, add one
 639         // (this can happen when pos_vdivs was 0 or 1 when trying to split)
 640         if ((min < 0) && (neg_vdivs_ == 0)) {
 641                 neg_vdivs_ = 1;
 642                 owner_->extents_changed(false, true);
 643         }
 644
 645         double min_value_per_div;
 646         if ((pos_vdivs_ > 0) && (neg_vdivs_ >  0))
 647                 min_value_per_div = std::max(max / pos_vdivs_, -min / neg_vdivs_);
 648         else if (pos_vdivs_ > 0)
 649                 min_value_per_div = max / pos_vdivs_;
 650         else
 651                 min_value_per_div = -min / neg_vdivs_;
 652
 653         // Find first scale value that is bigger than the value we need
 654         for (int i = MinScaleIndex; i < MaxScaleIndex; i++)
 655                 if (get_resolution(i) > min_value_per_div) {
 656                         scale_index_ = i;
 657                         break;
 658                 }
 659
 660         update_scale();
 661 }
 662
 663 void AnalogSignal::populate_popup_form(QWidget *parent, QFormLayout *form)
 664 {
 665         // Add the standard options
 666         Signal::populate_popup_form(parent, form);
 667
 668         QFormLayout *const layout = new QFormLayout;
 669
 670         // Add div-related settings
 671         pvdiv_sb_ = new QSpinBox(parent);
 672         pvdiv_sb_->setRange(0, MaximumVDivs);
 673         pvdiv_sb_->setValue(pos_vdivs_);
 674         connect(pvdiv_sb_, SIGNAL(valueChanged(int)),
 675                 this, SLOT(on_pos_vdivs_changed(int)));
 676         layout->addRow(tr("Number of pos vertical divs"), pvdiv_sb_);
 677
 678         nvdiv_sb_ = new QSpinBox(parent);
 679         nvdiv_sb_->setRange(0, MaximumVDivs);
 680         nvdiv_sb_->setValue(neg_vdivs_);
 681         connect(nvdiv_sb_, SIGNAL(valueChanged(int)),
 682                 this, SLOT(on_neg_vdivs_changed(int)));
 683         layout->addRow(tr("Number of neg vertical divs"), nvdiv_sb_);
 684
 685         div_height_sb_ = new QSpinBox(parent);
 686         div_height_sb_->setRange(20, 1000);
 687         div_height_sb_->setSingleStep(5);
 688         div_height_sb_->setSuffix(tr(" pixels"));
 689         div_height_sb_->setValue(div_height_);
 690         connect(div_height_sb_, SIGNAL(valueChanged(int)),
 691                 this, SLOT(on_div_height_changed(int)));
 692         layout->addRow(tr("Div height"), div_height_sb_);
 693
 694         // Add the vertical resolution
 695         resolution_cb_ = new QComboBox(parent);
 696
 697         for (int i = MinScaleIndex; i < MaxScaleIndex; i++) {
 698                 const QString label = QString("%1").arg(get_resolution(i));
 699                 resolution_cb_->insertItem(0, label, QVariant(i));
 700         }
 701
 702         int cur_idx = resolution_cb_->findData(QVariant(scale_index_));
 703         resolution_cb_->setCurrentIndex(cur_idx);
 704
 705         connect(resolution_cb_, SIGNAL(currentIndexChanged(int)),
 706                 this, SLOT(on_resolution_changed(int)));
 707
 708         QGridLayout *const vdiv_layout = new QGridLayout;
 709         QLabel *const vdiv_unit = new QLabel(tr("V/div"));
 710         vdiv_layout->addWidget(resolution_cb_, 0, 0);
 711         vdiv_layout->addWidget(vdiv_unit, 0, 1);
 712
 713         layout->addRow(tr("Vertical resolution"), vdiv_layout);
 714
 715         // Add the autoranging checkbox
 716         QCheckBox* autoranging_cb = new QCheckBox();
 717         autoranging_cb->setCheckState(autoranging_ ? Qt::Checked : Qt::Unchecked);
 718
 719         connect(autoranging_cb, SIGNAL(stateChanged(int)),
 720                 this, SLOT(on_autoranging_changed(int)));
 721
 722         layout->addRow(tr("Autoranging"), autoranging_cb);
 723
 724         // Add the conversion type dropdown
 725         conversion_cb_ = new QComboBox();
 726
 727         conversion_cb_->addItem("none", data::SignalBase::NoConversion);
 728         conversion_cb_->addItem("to logic via threshold", data::SignalBase::A2LConversionByTreshold);
 729         conversion_cb_->addItem("to logic via schmitt-trigger", data::SignalBase::A2LConversionBySchmittTrigger);
 730
 731         cur_idx = conversion_cb_->findData(QVariant(base_->get_conversion_type()));
 732         conversion_cb_->setCurrentIndex(cur_idx);
 733
 734         layout->addRow(tr("Conversion"), conversion_cb_);
 735
 736         connect(conversion_cb_, SIGNAL(currentIndexChanged(int)),
 737                 this, SLOT(on_conversion_changed(int)));
 738
 739         // Add the display type dropdown
 740         display_type_cb_ = new QComboBox();
 741
 742         display_type_cb_->addItem(tr("Analog"), DisplayAnalog);
 743         display_type_cb_->addItem(tr("Converted"), DisplayConverted);
 744         display_type_cb_->addItem(tr("Both"), DisplayBoth);
 745
 746         cur_idx = display_type_cb_->findData(QVariant(display_type_));
 747         display_type_cb_->setCurrentIndex(cur_idx);
 748
 749         layout->addRow(tr("Traces to show:"), display_type_cb_);
 750
 751         connect(display_type_cb_, SIGNAL(currentIndexChanged(int)),
 752                 this, SLOT(on_display_type_changed(int)));
 753
 754         form->addRow(layout);
 755 }
 756
 757 void AnalogSignal::on_samples_added()
 758 {
 759         perform_autoranging(false, false);
 760 }
 761
 762 void AnalogSignal::on_pos_vdivs_changed(int vdivs)
 763 {
 764         if (vdivs == pos_vdivs_)
 765                 return;
 766
 767         pos_vdivs_ = vdivs;
 768
 769         // There has to be at least one div, positive or negative
 770         if ((neg_vdivs_ == 0) && (pos_vdivs_ == 0)) {
 771                 pos_vdivs_ = 1;
 772                 if (pvdiv_sb_)
 773                         pvdiv_sb_->setValue(pos_vdivs_);
 774         }
 775
 776         if (autoranging_) {
 777                 perform_autoranging(true, true);
 778
 779                 // It could be that a positive or negative div was added, so update
 780                 if (pvdiv_sb_) {
 781                         pvdiv_sb_->setValue(pos_vdivs_);
 782                         nvdiv_sb_->setValue(neg_vdivs_);
 783                 }
 784         }
 785
 786         if (owner_) {
 787                 // Call order is important, otherwise the lazy event handler won't work
 788                 owner_->extents_changed(false, true);
 789                 owner_->row_item_appearance_changed(false, true);
 790         }
 791 }
 792
 793 void AnalogSignal::on_neg_vdivs_changed(int vdivs)
 794 {
 795         if (vdivs == neg_vdivs_)
 796                 return;
 797
 798         neg_vdivs_ = vdivs;
 799
 800         // There has to be at least one div, positive or negative
 801         if ((neg_vdivs_ == 0) && (pos_vdivs_ == 0)) {
 802                 pos_vdivs_ = 1;
 803                 if (pvdiv_sb_)
 804                         pvdiv_sb_->setValue(pos_vdivs_);
 805         }
 806
 807         if (autoranging_) {
 808                 perform_autoranging(true, true);
 809
 810                 // It could be that a positive or negative div was added, so update
 811                 if (pvdiv_sb_) {
 812                         pvdiv_sb_->setValue(pos_vdivs_);
 813                         nvdiv_sb_->setValue(neg_vdivs_);
 814                 }
 815         }
 816
 817         if (owner_) {
 818                 // Call order is important, otherwise the lazy event handler won't work
 819                 owner_->extents_changed(false, true);
 820                 owner_->row_item_appearance_changed(false, true);
 821         }
 822 }
 823
 824 void AnalogSignal::on_div_height_changed(int height)
 825 {
 826         div_height_ = height;
 827         update_scale();
 828
 829         if (owner_) {
 830                 // Call order is important, otherwise the lazy event handler won't work
 831                 owner_->extents_changed(false, true);
 832                 owner_->row_item_appearance_changed(false, true);
 833         }
 834 }
 835
 836 void AnalogSignal::on_resolution_changed(int index)
 837 {
 838         scale_index_ = resolution_cb_->itemData(index).toInt();
 839         update_scale();
 840
 841         if (owner_)
 842                 owner_->row_item_appearance_changed(false, true);
 843 }
 844
 845 void AnalogSignal::on_autoranging_changed(int state)
 846 {
 847         autoranging_ = (state == Qt::Checked);
 848
 849         if (autoranging_)
 850                 perform_autoranging(false, true);
 851
 852         if (owner_) {
 853                 // Call order is important, otherwise the lazy event handler won't work
 854                 owner_->extents_changed(false, true);
 855                 owner_->row_item_appearance_changed(false, true);
 856         }
 857 }
 858
 859 void AnalogSignal::on_conversion_changed(int index)
 860 {
 861         data::SignalBase::ConversionType old_conv_type =
 862                 base_->get_conversion_type();
 863
 864         data::SignalBase::ConversionType conv_type =
 865                 (data::SignalBase::ConversionType)(conversion_cb_->itemData(index).toInt());
 866
 867         if (conv_type != old_conv_type) {
 868                 base_->set_conversion_type(conv_type);
 869
 870                 if (owner_)
 871                         owner_->row_item_appearance_changed(false, true);
 872         }
 873 }
 874
 875 void AnalogSignal::on_display_type_changed(int index)
 876 {
 877         display_type_ = (DisplayType)(display_type_cb_->itemData(index).toInt());
 878
 879         if (owner_)
 880                 owner_->row_item_appearance_changed(false, true);
 881 }
 882
 883 } // namespace trace
 884 } // namespace views
 885 } // namespace pv