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 double pixels_per_sample = 1 / samples_per_pixel;
 463         const pv::util::Timestamp start = samplerate * (pp.offset() - start_time);
 464         const pv::util::Timestamp end = start + samples_per_pixel * pp.width();
 465
 466         const int64_t start_sample = min(max(floor(start).convert_to<int64_t>(),
 467                 (int64_t)0), last_sample);
 468         const uint64_t end_sample = min(max(ceil(end).convert_to<int64_t>(),
 469                 (int64_t)0), last_sample);
 470
 471         segment->get_subsampled_edges(edges, start_sample, end_sample,
 472                 samples_per_pixel / LogicSignal::Oversampling, 0);
 473         assert(edges.size() >= 2);
 474
 475         // Check whether we need to paint the sampling points
 476         GlobalSettings settings;
 477         const bool show_sampling_points =
 478                 settings.value(GlobalSettings::Key_View_ShowSamplingPoints).toBool() &&
 479                 (samples_per_pixel < 0.25);
 480
 481         vector<QRectF> sampling_points;
 482         float sampling_point_x = 0.0f;
 483         int64_t sampling_point_sample = start_sample;
 484         const int w = 2;
 485
 486         if (show_sampling_points) {
 487                 sampling_points.reserve(end_sample - start_sample + 1);
 488                 sampling_point_x = (edges.cbegin()->first / samples_per_pixel - pixels_offset) + pp.left();
 489         }
 490
 491         // Paint the edges
 492         const unsigned int edge_count = edges.size() - 2;
 493         QLineF *const edge_lines = new QLineF[edge_count];
 494         line = edge_lines;
 495
 496         for (auto i = edges.cbegin() + 1; i != edges.cend() - 1; i++) {
 497                 const float x = ((*i).first / samples_per_pixel -
 498                         pixels_offset) + pp.left();
 499                 *line++ = QLineF(x, high_offset, x, low_offset);
 500
 501                 if (show_sampling_points)
 502                         while (sampling_point_sample < (*i).first) {
 503                                 const float y = (*i).second ? low_offset : high_offset;
 504                                 sampling_points.emplace_back(
 505                                         QRectF(sampling_point_x - (w / 2), y - (w / 2), w, w));
 506                                 sampling_point_sample++;
 507                                 sampling_point_x += pixels_per_sample;
 508                         };
 509         }
 510
 511         // Calculate the sample points from the last edge to the end of the trace
 512         if (show_sampling_points)
 513                 while ((uint64_t)sampling_point_sample <= end_sample) {
 514                         // Signal changed after the last edge, so the level is inverted
 515                         const float y = (edges.cend() - 1)->second ? high_offset : low_offset;
 516                         sampling_points.emplace_back(
 517                                 QRectF(sampling_point_x - (w / 2), y - (w / 2), w, w));
 518                         sampling_point_sample++;
 519                         sampling_point_x += pixels_per_sample;
 520                 };
 521
 522         p.setPen(LogicSignal::EdgeColour);
 523         p.drawLines(edge_lines, edge_count);
 524         delete[] edge_lines;
 525
 526         // Paint the caps
 527         const unsigned int max_cap_line_count = edges.size();
 528         QLineF *const cap_lines = new QLineF[max_cap_line_count];
 529
 530         p.setPen(LogicSignal::HighColour);
 531         paint_logic_caps(p, cap_lines, edges, true, samples_per_pixel,
 532                 pixels_offset, pp.left(), high_offset);
 533         p.setPen(LogicSignal::LowColour);
 534         paint_logic_caps(p, cap_lines, edges, false, samples_per_pixel,
 535                 pixels_offset, pp.left(), low_offset);
 536
 537         delete[] cap_lines;
 538
 539         // Paint the sampling points
 540         if (show_sampling_points) {
 541                 p.setPen(SamplingPointColour);
 542                 p.drawRects(sampling_points.data(), sampling_points.size());
 543         }
 544 }
 545
 546 void AnalogSignal::paint_logic_caps(QPainter &p, QLineF *const lines,
 547         vector< pair<int64_t, bool> > &edges, bool level,
 548         double samples_per_pixel, double pixels_offset, float x_offset,
 549         float y_offset)
 550 {
 551         QLineF *line = lines;
 552
 553         for (auto i = edges.begin(); i != (edges.end() - 1); i++)
 554                 if ((*i).second == level) {
 555                         *line++ = QLineF(
 556                                 ((*i).first / samples_per_pixel -
 557                                         pixels_offset) + x_offset, y_offset,
 558                                 ((*(i+1)).first / samples_per_pixel -
 559                                         pixels_offset) + x_offset, y_offset);
 560                 }
 561
 562         p.drawLines(lines, line - lines);
 563 }
 564
 565 float AnalogSignal::get_resolution(int scale_index)
 566 {
 567         const float seq[] = {1.0f, 2.0f, 5.0f};
 568
 569         const int offset = numeric_limits<int>::max() / (2 * countof(seq));
 570         const div_t d = div((int)(scale_index + countof(seq) * offset),
 571                 countof(seq));
 572
 573         return powf(10.0f, d.quot - offset) * seq[d.rem];
 574 }
 575
 576 void AnalogSignal::update_scale()
 577 {
 578         resolution_ = get_resolution(scale_index_);
 579         scale_ = div_height_ / resolution_;
 580 }
 581
 582 void AnalogSignal::update_conversion_type()
 583 {
 584         base_->set_conversion_type(conversion_type_);
 585
 586         if (owner_)
 587                 owner_->row_item_appearance_changed(false, true);
 588 }
 589
 590 void AnalogSignal::perform_autoranging(bool keep_divs, bool force_update)
 591 {
 592         const deque< shared_ptr<pv::data::AnalogSegment> > &segments =
 593                 base_->analog_data()->analog_segments();
 594
 595         if (segments.empty())
 596                 return;
 597
 598         static double prev_min = 0, prev_max = 0;
 599         double min = 0, max = 0;
 600
 601         for (shared_ptr<pv::data::AnalogSegment> segment : segments) {
 602                 pair<double, double> mm = segment->get_min_max();
 603                 min = std::min(min, mm.first);
 604                 max = std::max(max, mm.second);
 605         }
 606
 607         if ((min == prev_min) && (max == prev_max) && !force_update)
 608                 return;
 609
 610         prev_min = min;
 611         prev_max = max;
 612
 613         // If we're allowed to alter the div assignment...
 614         if (!keep_divs) {
 615                 // Use all divs for the positive range if there are no negative values
 616                 if ((min == 0) && (neg_vdivs_ > 0)) {
 617                         pos_vdivs_ += neg_vdivs_;
 618                         neg_vdivs_ = 0;
 619                 }
 620
 621                 // Split up the divs if there are negative values but no negative divs
 622                 if ((min < 0) && (neg_vdivs_ == 0)) {
 623                         neg_vdivs_ = pos_vdivs_ / 2;
 624                         pos_vdivs_ -= neg_vdivs_;
 625                 }
 626         }
 627
 628         // If there is still no positive div when we need it, add one
 629         // (this can happen when pos_vdivs==neg_vdivs==0)
 630         if ((max > 0) && (pos_vdivs_ == 0)) {
 631                 pos_vdivs_ = 1;
 632                 owner_->extents_changed(false, true);
 633         }
 634
 635         // If there is still no negative div when we need it, add one
 636         // (this can happen when pos_vdivs was 0 or 1 when trying to split)
 637         if ((min < 0) && (neg_vdivs_ == 0)) {
 638                 neg_vdivs_ = 1;
 639                 owner_->extents_changed(false, true);
 640         }
 641
 642         double min_value_per_div;
 643         if ((pos_vdivs_ > 0) && (neg_vdivs_ >  0))
 644                 min_value_per_div = std::max(max / pos_vdivs_, -min / neg_vdivs_);
 645         else if (pos_vdivs_ > 0)
 646                 min_value_per_div = max / pos_vdivs_;
 647         else
 648                 min_value_per_div = -min / neg_vdivs_;
 649
 650         // Find first scale value that is bigger than the value we need
 651         for (int i = MinScaleIndex; i < MaxScaleIndex; i++)
 652                 if (get_resolution(i) > min_value_per_div) {
 653                         scale_index_ = i;
 654                         break;
 655                 }
 656
 657         update_scale();
 658 }
 659
 660 void AnalogSignal::populate_popup_form(QWidget *parent, QFormLayout *form)
 661 {
 662         // Add the standard options
 663         Signal::populate_popup_form(parent, form);
 664
 665         QFormLayout *const layout = new QFormLayout;
 666
 667         // Add the number of vdivs
 668         pvdiv_sb_ = new QSpinBox(parent);
 669         pvdiv_sb_->setRange(0, MaximumVDivs);
 670         pvdiv_sb_->setValue(pos_vdivs_);
 671         connect(pvdiv_sb_, SIGNAL(valueChanged(int)),
 672                 this, SLOT(on_pos_vdivs_changed(int)));
 673         layout->addRow(tr("Number of pos vertical divs"), pvdiv_sb_);
 674
 675         nvdiv_sb_ = new QSpinBox(parent);
 676         nvdiv_sb_->setRange(0, MaximumVDivs);
 677         nvdiv_sb_->setValue(neg_vdivs_);
 678         connect(nvdiv_sb_, SIGNAL(valueChanged(int)),
 679                 this, SLOT(on_neg_vdivs_changed(int)));
 680         layout->addRow(tr("Number of neg vertical divs"), nvdiv_sb_);
 681
 682         // Add the vertical resolution
 683         resolution_cb_ = new QComboBox(parent);
 684
 685         for (int i = MinScaleIndex; i < MaxScaleIndex; i++) {
 686                 const QString label = QString("%1").arg(get_resolution(i));
 687                 resolution_cb_->insertItem(0, label, QVariant(i));
 688         }
 689
 690         int cur_idx = resolution_cb_->findData(QVariant(scale_index_));
 691         resolution_cb_->setCurrentIndex(cur_idx);
 692
 693         connect(resolution_cb_, SIGNAL(currentIndexChanged(int)),
 694                 this, SLOT(on_resolution_changed(int)));
 695
 696         QGridLayout *const vdiv_layout = new QGridLayout;
 697         QLabel *const vdiv_unit = new QLabel(tr("V/div"));
 698         vdiv_layout->addWidget(resolution_cb_, 0, 0);
 699         vdiv_layout->addWidget(vdiv_unit, 0, 1);
 700
 701         layout->addRow(tr("Vertical resolution"), vdiv_layout);
 702
 703         // Add the autoranging checkbox
 704         QCheckBox* autoranging_cb = new QCheckBox();
 705         autoranging_cb->setCheckState(autoranging_ ? Qt::Checked : Qt::Unchecked);
 706
 707         connect(autoranging_cb, SIGNAL(stateChanged(int)),
 708                 this, SLOT(on_autoranging_changed(int)));
 709
 710         layout->addRow(tr("Autoranging"), autoranging_cb);
 711
 712         // Add the conversion type dropdown
 713         conversion_cb_ = new QComboBox();
 714
 715         conversion_cb_->addItem("none", data::SignalBase::NoConversion);
 716         conversion_cb_->addItem("to logic via threshold", data::SignalBase::A2LConversionByTreshold);
 717         conversion_cb_->addItem("to logic via schmitt-trigger", data::SignalBase::A2LConversionBySchmittTrigger);
 718
 719         cur_idx = conversion_cb_->findData(QVariant(conversion_type_));
 720         conversion_cb_->setCurrentIndex(cur_idx);
 721
 722 //      layout->addRow(tr("Conversion"), conversion_cb_);
 723
 724         connect(conversion_cb_, SIGNAL(currentIndexChanged(int)),
 725                 this, SLOT(on_conversion_changed(int)));
 726
 727         // Add the display type dropdown
 728         display_type_cb_ = new QComboBox();
 729
 730         display_type_cb_->addItem(tr("Analog"), DisplayAnalog);
 731         display_type_cb_->addItem(tr("Converted"), DisplayConverted);
 732         display_type_cb_->addItem(tr("Both"), DisplayBoth);
 733
 734         cur_idx = display_type_cb_->findData(QVariant(display_type_));
 735         display_type_cb_->setCurrentIndex(cur_idx);
 736
 737 //      layout->addRow(tr("Traces to show:"), display_type_cb_);
 738
 739         connect(display_type_cb_, SIGNAL(currentIndexChanged(int)),
 740                 this, SLOT(on_display_type_changed(int)));
 741
 742         form->addRow(layout);
 743 }
 744
 745 void AnalogSignal::on_samples_added()
 746 {
 747         perform_autoranging(false, false);
 748 }
 749
 750 void AnalogSignal::on_pos_vdivs_changed(int vdivs)
 751 {
 752         if (vdivs == pos_vdivs_)
 753                 return;
 754
 755         pos_vdivs_ = vdivs;
 756
 757         // There has to be at least one div, positive or negative
 758         if ((neg_vdivs_ == 0) && (pos_vdivs_ == 0)) {
 759                 pos_vdivs_ = 1;
 760                 if (pvdiv_sb_)
 761                         pvdiv_sb_->setValue(pos_vdivs_);
 762         }
 763
 764         if (autoranging_) {
 765                 perform_autoranging(true, true);
 766
 767                 // It could be that a positive or negative div was added, so update
 768                 if (pvdiv_sb_) {
 769                         pvdiv_sb_->setValue(pos_vdivs_);
 770                         nvdiv_sb_->setValue(neg_vdivs_);
 771                 }
 772         }
 773
 774         if (owner_) {
 775                 // Call order is important, otherwise the lazy event handler won't work
 776                 owner_->extents_changed(false, true);
 777                 owner_->row_item_appearance_changed(false, true);
 778         }
 779 }
 780
 781 void AnalogSignal::on_neg_vdivs_changed(int vdivs)
 782 {
 783         if (vdivs == neg_vdivs_)
 784                 return;
 785
 786         neg_vdivs_ = vdivs;
 787
 788         // There has to be at least one div, positive or negative
 789         if ((neg_vdivs_ == 0) && (pos_vdivs_ == 0)) {
 790                 pos_vdivs_ = 1;
 791                 if (pvdiv_sb_)
 792                         pvdiv_sb_->setValue(pos_vdivs_);
 793         }
 794
 795         if (autoranging_) {
 796                 perform_autoranging(true, true);
 797
 798                 // It could be that a positive or negative div was added, so update
 799                 if (pvdiv_sb_) {
 800                         pvdiv_sb_->setValue(pos_vdivs_);
 801                         nvdiv_sb_->setValue(neg_vdivs_);
 802                 }
 803         }
 804
 805         if (owner_) {
 806                 // Call order is important, otherwise the lazy event handler won't work
 807                 owner_->extents_changed(false, true);
 808                 owner_->row_item_appearance_changed(false, true);
 809         }
 810 }
 811
 812 void AnalogSignal::on_resolution_changed(int index)
 813 {
 814         scale_index_ = resolution_cb_->itemData(index).toInt();
 815         update_scale();
 816
 817         if (owner_)
 818                 owner_->row_item_appearance_changed(false, true);
 819 }
 820
 821 void AnalogSignal::on_autoranging_changed(int state)
 822 {
 823         autoranging_ = (state == Qt::Checked);
 824
 825         if (autoranging_)
 826                 perform_autoranging(false, true);
 827
 828         if (owner_) {
 829                 // Call order is important, otherwise the lazy event handler won't work
 830                 owner_->extents_changed(false, true);
 831                 owner_->row_item_appearance_changed(false, true);
 832         }
 833 }
 834
 835 void AnalogSignal::on_conversion_changed(int index)
 836 {
 837         data::SignalBase::ConversionType old_conv_type = conversion_type_;
 838
 839         conversion_type_ = (data::SignalBase::ConversionType)(conversion_cb_->itemData(index).toInt());
 840
 841         if (conversion_type_ != old_conv_type) {
 842                 base_->set_conversion_type(conversion_type_);
 843                 update_conversion_type();
 844         }
 845 }
 846
 847 void AnalogSignal::on_display_type_changed(int index)
 848 {
 849         display_type_ = (DisplayType)(display_type_cb_->itemData(index).toInt());
 850
 851         if (owner_)
 852                 owner_->row_item_appearance_changed(false, true);
 853 }
 854
 855 } // namespace TraceView
 856 } // namespace views
 857 } // namespace pv