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