pv/views/trace/decodetrace.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 extern "C" {
  21 #include <libsigrokdecode/libsigrokdecode.h>
  22 }
  23
  24 #include <mutex>
  25 #include <tuple>
  26
  27 #include <extdef.h>
  28
  29 #include <boost/functional/hash.hpp>
  30
  31 #include <QAction>
  32 #include <QApplication>
  33 #include <QComboBox>
  34 #include <QFormLayout>
  35 #include <QLabel>
  36 #include <QMenu>
  37 #include <QPushButton>
  38 #include <QToolTip>
  39
  40 #include "decodetrace.hpp"
  41 #include "view.hpp"
  42 #include "viewport.hpp"
  43
  44 #include <pv/globalsettings.hpp>
  45 #include <pv/session.hpp>
  46 #include <pv/strnatcmp.hpp>
  47 #include <pv/data/decodesignal.hpp>
  48 #include <pv/data/decode/annotation.hpp>
  49 #include <pv/data/decode/decoder.hpp>
  50 #include <pv/data/logic.hpp>
  51 #include <pv/data/logicsegment.hpp>
  52 #include <pv/widgets/decodergroupbox.hpp>
  53 #include <pv/widgets/decodermenu.hpp>
  54
  55 using std::abs;
  56 using std::make_pair;
  57 using std::max;
  58 using std::min;
  59 using std::out_of_range;
  60 using std::pair;
  61 using std::shared_ptr;
  62 using std::tie;
  63 using std::vector;
  64
  65 using pv::data::decode::Annotation;
  66 using pv::data::decode::Row;
  67 using pv::data::DecodeChannel;
  68 using pv::data::DecodeSignal;
  69
  70 namespace pv {
  71 namespace views {
  72 namespace trace {
  73
  74
  75 #define DECODETRACE_COLOR_SATURATION (180) /* 0-255 */
  76 #define DECODETRACE_COLOR_VALUE (170) /* 0-255 */
  77
  78 const QColor DecodeTrace::ErrorBgColor = QColor(0xEF, 0x29, 0x29);
  79 const QColor DecodeTrace::NoDecodeColor = QColor(0x88, 0x8A, 0x85);
  80
  81 const int DecodeTrace::ArrowSize = 4;
  82 const double DecodeTrace::EndCapWidth = 5;
  83 const int DecodeTrace::RowTitleMargin = 10;
  84 const int DecodeTrace::DrawPadding = 100;
  85
  86 const int DecodeTrace::MaxTraceUpdateRate = 1; // No more than 1 Hz
  87
  88 DecodeTrace::DecodeTrace(pv::Session &session,
  89         shared_ptr<data::SignalBase> signalbase, int index) :
  90         Trace(signalbase),
  91         session_(session),
  92         row_height_(0),
  93         max_visible_rows_(0),
  94         delete_mapper_(this),
  95         show_hide_mapper_(this)
  96 {
  97         decode_signal_ = dynamic_pointer_cast<data::DecodeSignal>(base_);
  98
  99         // Determine shortest string we want to see displayed in full
 100         QFontMetrics m(QApplication::font());
 101         min_useful_label_width_ = m.width("XX"); // e.g. two hex characters
 102
 103         // For the base color, we want to start at a very different color for
 104         // every decoder stack, so multiply the index with a number that is
 105         // rather close to 180 degrees of the color circle but not a dividend of 360
 106         // Note: The offset equals the color of the first annotation
 107         QColor color;
 108         const int h = (120 + 160 * index) % 360;
 109         const int s = DECODETRACE_COLOR_SATURATION;
 110         const int v = DECODETRACE_COLOR_VALUE;
 111         color.setHsv(h, s, v);
 112         base_->set_color(color);
 113
 114         connect(decode_signal_.get(), SIGNAL(new_annotations()),
 115                 this, SLOT(on_new_annotations()));
 116         connect(decode_signal_.get(), SIGNAL(decode_reset()),
 117                 this, SLOT(on_decode_reset()));
 118         connect(decode_signal_.get(), SIGNAL(decode_finished()),
 119                 this, SLOT(on_decode_finished()));
 120         connect(decode_signal_.get(), SIGNAL(channels_updated()),
 121                 this, SLOT(on_channels_updated()));
 122
 123         connect(&delete_mapper_, SIGNAL(mapped(int)),
 124                 this, SLOT(on_delete_decoder(int)));
 125         connect(&show_hide_mapper_, SIGNAL(mapped(int)),
 126                 this, SLOT(on_show_hide_decoder(int)));
 127
 128         connect(&delayed_trace_updater_, SIGNAL(timeout()),
 129                 this, SLOT(on_delayed_trace_update()));
 130         delayed_trace_updater_.setSingleShot(true);
 131         delayed_trace_updater_.setInterval(1000 / MaxTraceUpdateRate);
 132 }
 133
 134 bool DecodeTrace::enabled() const
 135 {
 136         return true;
 137 }
 138
 139 shared_ptr<data::SignalBase> DecodeTrace::base() const
 140 {
 141         return base_;
 142 }
 143
 144 pair<int, int> DecodeTrace::v_extents() const
 145 {
 146         const int row_height = (ViewItemPaintParams::text_height() * 6) / 4;
 147
 148         // Make an empty decode trace appear symmetrical
 149         const int row_count = max(1, max_visible_rows_);
 150
 151         return make_pair(-row_height, row_height * row_count);
 152 }
 153
 154 void DecodeTrace::paint_back(QPainter &p, ViewItemPaintParams &pp)
 155 {
 156         Trace::paint_back(p, pp);
 157         paint_axis(p, pp, get_visual_y());
 158 }
 159
 160 void DecodeTrace::paint_mid(QPainter &p, ViewItemPaintParams &pp)
 161 {
 162         const int text_height = ViewItemPaintParams::text_height();
 163         row_height_ = (text_height * 6) / 4;
 164         const int annotation_height = (text_height * 5) / 4;
 165
 166         const QString err = decode_signal_->error_message();
 167         if (!err.isEmpty()) {
 168                 draw_unresolved_period(
 169                         p, annotation_height, pp.left(), pp.right());
 170                 draw_error(p, err, pp);
 171                 return;
 172         }
 173
 174         // Set default pen to allow for text width calculation
 175         p.setPen(Qt::black);
 176
 177         // Iterate through the rows
 178         int y = get_visual_y();
 179         pair<uint64_t, uint64_t> sample_range = get_sample_range(
 180                 pp.left(), pp.right());
 181
 182         const vector<Row> rows = decode_signal_->visible_rows();
 183
 184         visible_rows_.clear();
 185         for (const Row& row : rows) {
 186                 // Cache the row title widths
 187                 int row_title_width;
 188                 try {
 189                         row_title_width = row_title_widths_.at(row);
 190                 } catch (out_of_range&) {
 191                         const int w = p.boundingRect(QRectF(), 0, row.title()).width() +
 192                                 RowTitleMargin;
 193                         row_title_widths_[row] = w;
 194                         row_title_width = w;
 195                 }
 196
 197                 vector<Annotation> annotations;
 198                 decode_signal_->get_annotation_subset(annotations, row,
 199                         current_segment_, sample_range.first, sample_range.second);
 200                 if (!annotations.empty()) {
 201                         draw_annotations(annotations, p, annotation_height, pp, y,
 202                                 get_row_color(visible_rows_.size()), row_title_width);
 203
 204                         y += row_height_;
 205
 206                         visible_rows_.push_back(row);
 207                 }
 208         }
 209
 210         // Draw the hatching
 211         draw_unresolved_period(p, annotation_height, pp.left(), pp.right());
 212
 213         if ((int)visible_rows_.size() > max_visible_rows_) {
 214                 max_visible_rows_ = (int)visible_rows_.size();
 215
 216                 // Call order is important, otherwise the lazy event handler won't work
 217                 owner_->extents_changed(false, true);
 218                 owner_->row_item_appearance_changed(false, true);
 219         }
 220 }
 221
 222 void DecodeTrace::paint_fore(QPainter &p, ViewItemPaintParams &pp)
 223 {
 224         assert(row_height_);
 225
 226         for (size_t i = 0; i < visible_rows_.size(); i++) {
 227                 const int y = i * row_height_ + get_visual_y();
 228
 229                 p.setPen(QPen(Qt::NoPen));
 230                 p.setBrush(QApplication::palette().brush(QPalette::WindowText));
 231
 232                 if (i != 0) {
 233                         const QPointF points[] = {
 234                                 QPointF(pp.left(), y - ArrowSize),
 235                                 QPointF(pp.left() + ArrowSize, y),
 236                                 QPointF(pp.left(), y + ArrowSize)
 237                         };
 238                         p.drawPolygon(points, countof(points));
 239                 }
 240
 241                 const QRect r(pp.left() + ArrowSize * 2, y - row_height_ / 2,
 242                         pp.right() - pp.left(), row_height_);
 243                 const QString h(visible_rows_[i].title());
 244                 const int f = Qt::AlignLeft | Qt::AlignVCenter |
 245                         Qt::TextDontClip;
 246
 247                 // Draw the outline
 248                 p.setPen(QApplication::palette().color(QPalette::Base));
 249                 for (int dx = -1; dx <= 1; dx++)
 250                         for (int dy = -1; dy <= 1; dy++)
 251                                 if (dx != 0 && dy != 0)
 252                                         p.drawText(r.translated(dx, dy), f, h);
 253
 254                 // Draw the text
 255                 p.setPen(QApplication::palette().color(QPalette::WindowText));
 256                 p.drawText(r, f, h);
 257         }
 258 }
 259
 260 void DecodeTrace::populate_popup_form(QWidget *parent, QFormLayout *form)
 261 {
 262         using pv::data::decode::Decoder;
 263
 264         assert(form);
 265
 266         // Add the standard options
 267         Trace::populate_popup_form(parent, form);
 268
 269         // Add the decoder options
 270         bindings_.clear();
 271         channel_id_map_.clear();
 272         init_state_map_.clear();
 273         decoder_forms_.clear();
 274
 275         const vector< shared_ptr<Decoder> > &stack = decode_signal_->decoder_stack();
 276
 277         if (stack.empty()) {
 278                 QLabel *const l = new QLabel(
 279                         tr("<p><i>No decoders in the stack</i></p>"));
 280                 l->setAlignment(Qt::AlignCenter);
 281                 form->addRow(l);
 282         } else {
 283                 auto iter = stack.cbegin();
 284                 for (int i = 0; i < (int)stack.size(); i++, iter++) {
 285                         shared_ptr<Decoder> dec(*iter);
 286                         create_decoder_form(i, dec, parent, form);
 287                 }
 288
 289                 form->addRow(new QLabel(
 290                         tr("<i>* Required channels</i>"), parent));
 291         }
 292
 293         // Add stacking button
 294         pv::widgets::DecoderMenu *const decoder_menu =
 295                 new pv::widgets::DecoderMenu(parent);
 296         connect(decoder_menu, SIGNAL(decoder_selected(srd_decoder*)),
 297                 this, SLOT(on_stack_decoder(srd_decoder*)));
 298
 299         QPushButton *const stack_button =
 300                 new QPushButton(tr("Stack Decoder"), parent);
 301         stack_button->setMenu(decoder_menu);
 302         stack_button->setToolTip(tr("Stack a higher-level decoder on top of this one"));
 303
 304         QHBoxLayout *stack_button_box = new QHBoxLayout;
 305         stack_button_box->addWidget(stack_button, 0, Qt::AlignRight);
 306         form->addRow(stack_button_box);
 307 }
 308
 309 QMenu* DecodeTrace::create_context_menu(QWidget *parent)
 310 {
 311         QMenu *const menu = Trace::create_context_menu(parent);
 312
 313         menu->addSeparator();
 314
 315         QAction *const del = new QAction(tr("Delete"), this);
 316         del->setShortcuts(QKeySequence::Delete);
 317         connect(del, SIGNAL(triggered()), this, SLOT(on_delete()));
 318         menu->addAction(del);
 319
 320         return menu;
 321 }
 322
 323 void DecodeTrace::draw_annotations(vector<pv::data::decode::Annotation> annotations,
 324                 QPainter &p, int h, const ViewItemPaintParams &pp, int y,
 325                 QColor row_color, int row_title_width)
 326 {
 327         using namespace pv::data::decode;
 328
 329         Annotation::Class block_class = 0;
 330         bool block_class_uniform = true;
 331         qreal block_start = 0;
 332         int block_ann_count = 0;
 333
 334         const Annotation *prev_ann;
 335         qreal prev_end = INT_MIN;
 336
 337         qreal a_end;
 338
 339         double samples_per_pixel, pixels_offset;
 340         tie(pixels_offset, samples_per_pixel) =
 341                 get_pixels_offset_samples_per_pixel();
 342
 343         // Sort the annotations by start sample so that decoders
 344         // can't confuse us by creating annotations out of order
 345         stable_sort(annotations.begin(), annotations.end(),
 346                 [](const Annotation &a, const Annotation &b) {
 347                         return a.start_sample() < b.start_sample(); });
 348
 349         // Gather all annotations that form a visual "block" and draw them as such
 350         for (const Annotation &a : annotations) {
 351
 352                 const qreal abs_a_start = a.start_sample() / samples_per_pixel;
 353                 const qreal abs_a_end   = a.end_sample() / samples_per_pixel;
 354
 355                 const qreal a_start = abs_a_start - pixels_offset;
 356                 a_end = abs_a_end - pixels_offset;
 357
 358                 const qreal a_width = a_end - a_start;
 359                 const qreal delta = a_end - prev_end;
 360
 361                 bool a_is_separate = false;
 362
 363                 // Annotation wider than the threshold for a useful label width?
 364                 if (a_width >= min_useful_label_width_) {
 365                         for (const QString &ann_text : a.annotations()) {
 366                                 const qreal w = p.boundingRect(QRectF(), 0, ann_text).width();
 367                                 // Annotation wide enough to fit a label? Don't put it in a block then
 368                                 if (w <= a_width) {
 369                                         a_is_separate = true;
 370                                         break;
 371                                 }
 372                         }
 373                 }
 374
 375                 // Were the previous and this annotation more than a pixel apart?
 376                 if ((abs(delta) > 1) || a_is_separate) {
 377                         // Block was broken, draw annotations that form the current block
 378                         if (block_ann_count == 1)
 379                                 draw_annotation(*prev_ann, p, h, pp, y, row_color,
 380                                         row_title_width);
 381                         else if (block_ann_count > 0)
 382                                 draw_annotation_block(block_start, prev_end, block_class,
 383                                         block_class_uniform, p, h, y, row_color);
 384
 385                         block_ann_count = 0;
 386                 }
 387
 388                 if (a_is_separate) {
 389                         draw_annotation(a, p, h, pp, y, row_color, row_title_width);
 390                         // Next annotation must start a new block. delta will be > 1
 391                         // because we set prev_end to INT_MIN but that's okay since
 392                         // block_ann_count will be 0 and nothing will be drawn
 393                         prev_end = INT_MIN;
 394                         block_ann_count = 0;
 395                 } else {
 396                         prev_end = a_end;
 397                         prev_ann = &a;
 398
 399                         if (block_ann_count == 0) {
 400                                 block_start = a_start;
 401                                 block_class = a.ann_class();
 402                                 block_class_uniform = true;
 403                         } else
 404                                 if (a.ann_class() != block_class)
 405                                         block_class_uniform = false;
 406
 407                         block_ann_count++;
 408                 }
 409         }
 410
 411         if (block_ann_count == 1)
 412                 draw_annotation(*prev_ann, p, h, pp, y, row_color, row_title_width);
 413         else if (block_ann_count > 0)
 414                 draw_annotation_block(block_start, prev_end, block_class,
 415                         block_class_uniform, p, h, y, row_color);
 416 }
 417
 418 void DecodeTrace::draw_annotation(const pv::data::decode::Annotation &a,
 419         QPainter &p, int h, const ViewItemPaintParams &pp, int y,
 420         QColor row_color, int row_title_width) const
 421 {
 422         double samples_per_pixel, pixels_offset;
 423         tie(pixels_offset, samples_per_pixel) =
 424                 get_pixels_offset_samples_per_pixel();
 425
 426         const double start = a.start_sample() / samples_per_pixel -
 427                 pixels_offset;
 428         const double end = a.end_sample() / samples_per_pixel - pixels_offset;
 429
 430         QColor color = get_annotation_color(row_color, a.ann_class());
 431         p.setPen(color.darker());
 432         p.setBrush(color);
 433
 434         if (start > pp.right() + DrawPadding || end < pp.left() - DrawPadding)
 435                 return;
 436
 437         if (a.start_sample() == a.end_sample())
 438                 draw_instant(a, p, h, start, y);
 439         else
 440                 draw_range(a, p, h, start, end, y, pp, row_title_width);
 441 }
 442
 443 void DecodeTrace::draw_annotation_block(qreal start, qreal end,
 444         Annotation::Class ann_class, bool use_ann_format, QPainter &p, int h,
 445         int y, QColor row_color) const
 446 {
 447         const double top = y + .5 - h / 2;
 448         const double bottom = y + .5 + h / 2;
 449
 450         const QRectF rect(start, top, end - start, bottom - top);
 451         const int r = h / 4;
 452
 453         p.setPen(QPen(Qt::NoPen));
 454         p.setBrush(Qt::white);
 455         p.drawRoundedRect(rect, r, r);
 456
 457         // If all annotations in this block are of the same type, we can use the
 458         // one format that all of these annotations have. Otherwise, we should use
 459         // a neutral color (i.e. gray)
 460         if (use_ann_format) {
 461                 const QColor color = get_annotation_color(row_color, ann_class);
 462                 p.setPen(color.darker());
 463                 p.setBrush(QBrush(color, Qt::Dense4Pattern));
 464         } else {
 465                 p.setPen(Qt::gray);
 466                 p.setBrush(QBrush(Qt::gray, Qt::Dense4Pattern));
 467         }
 468
 469         p.drawRoundedRect(rect, r, r);
 470 }
 471
 472 void DecodeTrace::draw_instant(const pv::data::decode::Annotation &a, QPainter &p,
 473         int h, qreal x, int y) const
 474 {
 475         const QString text = a.annotations().empty() ?
 476                 QString() : a.annotations().back();
 477         const qreal w = min((qreal)p.boundingRect(QRectF(), 0, text).width(),
 478                 0.0) + h;
 479         const QRectF rect(x - w / 2, y - h / 2, w, h);
 480
 481         p.drawRoundedRect(rect, h / 2, h / 2);
 482
 483         p.setPen(Qt::black);
 484         p.drawText(rect, Qt::AlignCenter | Qt::AlignVCenter, text);
 485 }
 486
 487 void DecodeTrace::draw_range(const pv::data::decode::Annotation &a, QPainter &p,
 488         int h, qreal start, qreal end, int y, const ViewItemPaintParams &pp,
 489         int row_title_width) const
 490 {
 491         const qreal top = y + .5 - h / 2;
 492         const qreal bottom = y + .5 + h / 2;
 493         const vector<QString> annotations = a.annotations();
 494
 495         // If the two ends are within 1 pixel, draw a vertical line
 496         if (start + 1.0 > end) {
 497                 p.drawLine(QPointF(start, top), QPointF(start, bottom));
 498                 return;
 499         }
 500
 501         const qreal cap_width = min((end - start) / 4, EndCapWidth);
 502
 503         QPointF pts[] = {
 504                 QPointF(start, y + .5f),
 505                 QPointF(start + cap_width, top),
 506                 QPointF(end - cap_width, top),
 507                 QPointF(end, y + .5f),
 508                 QPointF(end - cap_width, bottom),
 509                 QPointF(start + cap_width, bottom)
 510         };
 511
 512         p.drawConvexPolygon(pts, countof(pts));
 513
 514         if (annotations.empty())
 515                 return;
 516
 517         const int ann_start = start + cap_width;
 518         const int ann_end = end - cap_width;
 519
 520         const int real_start = max(ann_start, pp.left() + row_title_width);
 521         const int real_end = min(ann_end, pp.right());
 522         const int real_width = real_end - real_start;
 523
 524         QRectF rect(real_start, y - h / 2, real_width, h);
 525         if (rect.width() <= 4)
 526                 return;
 527
 528         p.setPen(Qt::black);
 529
 530         // Try to find an annotation that will fit
 531         QString best_annotation;
 532         int best_width = 0;
 533
 534         for (const QString &a : annotations) {
 535                 const int w = p.boundingRect(QRectF(), 0, a).width();
 536                 if (w <= rect.width() && w > best_width)
 537                         best_annotation = a, best_width = w;
 538         }
 539
 540         if (best_annotation.isEmpty())
 541                 best_annotation = annotations.back();
 542
 543         // If not ellide the last in the list
 544         p.drawText(rect, Qt::AlignCenter, p.fontMetrics().elidedText(
 545                 best_annotation, Qt::ElideRight, rect.width()));
 546 }
 547
 548 void DecodeTrace::draw_error(QPainter &p, const QString &message,
 549         const ViewItemPaintParams &pp)
 550 {
 551         const int y = get_visual_y();
 552
 553         p.setPen(ErrorBgColor.darker());
 554         p.setBrush(ErrorBgColor);
 555
 556         const QRectF bounding_rect =
 557                 QRectF(pp.left(), INT_MIN / 2 + y, pp.right(), INT_MAX);
 558         const QRectF text_rect = p.boundingRect(bounding_rect,
 559                 Qt::AlignCenter, message);
 560         const qreal r = text_rect.height() / 4;
 561
 562         p.drawRoundedRect(text_rect.adjusted(-r, -r, r, r), r, r,
 563                 Qt::AbsoluteSize);
 564
 565         p.setPen(Qt::black);
 566         p.drawText(text_rect, message);
 567 }
 568
 569 void DecodeTrace::draw_unresolved_period(QPainter &p, int h, int left, int right) const
 570 {
 571         using namespace pv::data;
 572         using pv::data::decode::Decoder;
 573
 574         double samples_per_pixel, pixels_offset;
 575
 576         const int64_t sample_count = decode_signal_->get_working_sample_count(current_segment_);
 577         if (sample_count == 0)
 578                 return;
 579
 580         const int64_t samples_decoded = decode_signal_->get_decoded_sample_count(current_segment_);
 581         if (sample_count == samples_decoded)
 582                 return;
 583
 584         const int y = get_visual_y();
 585
 586         tie(pixels_offset, samples_per_pixel) = get_pixels_offset_samples_per_pixel();
 587
 588         const double start = max(samples_decoded /
 589                 samples_per_pixel - pixels_offset, left - 1.0);
 590         const double end = min(sample_count / samples_per_pixel -
 591                 pixels_offset, right + 1.0);
 592         const QRectF no_decode_rect(start, y - (h / 2) - 0.5, end - start, h);
 593
 594         p.setPen(QPen(Qt::NoPen));
 595         p.setBrush(Qt::white);
 596         p.drawRect(no_decode_rect);
 597
 598         p.setPen(NoDecodeColor);
 599         p.setBrush(QBrush(NoDecodeColor, Qt::Dense6Pattern));
 600         p.drawRect(no_decode_rect);
 601 }
 602
 603 pair<double, double> DecodeTrace::get_pixels_offset_samples_per_pixel() const
 604 {
 605         assert(owner_);
 606
 607         const View *view = owner_->view();
 608         assert(view);
 609
 610         const double scale = view->scale();
 611         assert(scale > 0);
 612
 613         const double pixels_offset =
 614                 ((view->offset() - decode_signal_->start_time()) / scale).convert_to<double>();
 615
 616         double samplerate = decode_signal_->samplerate();
 617
 618         // Show sample rate as 1Hz when it is unknown
 619         if (samplerate == 0.0)
 620                 samplerate = 1.0;
 621
 622         return make_pair(pixels_offset, samplerate * scale);
 623 }
 624
 625 pair<uint64_t, uint64_t> DecodeTrace::get_sample_range(
 626         int x_start, int x_end) const
 627 {
 628         double samples_per_pixel, pixels_offset;
 629         tie(pixels_offset, samples_per_pixel) =
 630                 get_pixels_offset_samples_per_pixel();
 631
 632         const uint64_t start = (uint64_t)max(
 633                 (x_start + pixels_offset) * samples_per_pixel, 0.0);
 634         const uint64_t end = (uint64_t)max(
 635                 (x_end + pixels_offset) * samples_per_pixel, 0.0);
 636
 637         return make_pair(start, end);
 638 }
 639
 640 QColor DecodeTrace::get_row_color(int row_index) const
 641 {
 642         // For each row color, use the base color hue and add an offset that's
 643         // not a dividend of 360
 644
 645         QColor color;
 646         const int h = (base_->color().toHsv().hue() + 20 * row_index) % 360;
 647         const int s = DECODETRACE_COLOR_SATURATION;
 648         const int v = DECODETRACE_COLOR_VALUE;
 649         color.setHsl(h, s, v);
 650
 651         return color;
 652 }
 653
 654 QColor DecodeTrace::get_annotation_color(QColor row_color, int annotation_index) const
 655 {
 656         // For each row color, use the base color hue and add an offset that's
 657         // not a dividend of 360 and not a multiple of the row offset
 658
 659         QColor color(row_color);
 660         const int h = (color.toHsv().hue() + 55 * annotation_index) % 360;
 661         const int s = DECODETRACE_COLOR_SATURATION;
 662         const int v = DECODETRACE_COLOR_VALUE;
 663         color.setHsl(h, s, v);
 664
 665         return color;
 666 }
 667
 668 int DecodeTrace::get_row_at_point(const QPoint &point)
 669 {
 670         if (!row_height_)
 671                 return -1;
 672
 673         const int y = (point.y() - get_visual_y() + row_height_ / 2);
 674
 675         /* Integer divison of (x-1)/x would yield 0, so we check for this. */
 676         if (y < 0)
 677                 return -1;
 678
 679         const int row = y / row_height_;
 680
 681         if (row >= (int)visible_rows_.size())
 682                 return -1;
 683
 684         return row;
 685 }
 686
 687 const QString DecodeTrace::get_annotation_at_point(const QPoint &point)
 688 {
 689         using namespace pv::data::decode;
 690
 691         if (!enabled())
 692                 return QString();
 693
 694         const pair<uint64_t, uint64_t> sample_range =
 695                 get_sample_range(point.x(), point.x() + 1);
 696         const int row = get_row_at_point(point);
 697         if (row < 0)
 698                 return QString();
 699
 700         vector<pv::data::decode::Annotation> annotations;
 701
 702         decode_signal_->get_annotation_subset(annotations, visible_rows_[row],
 703                 current_segment_, sample_range.first, sample_range.second);
 704
 705         return (annotations.empty()) ?
 706                 QString() : annotations[0].annotations().front();
 707 }
 708
 709 void DecodeTrace::hover_point_changed(const QPoint &hp)
 710 {
 711         assert(owner_);
 712
 713         const View *const view = owner_->view();
 714         assert(view);
 715
 716         if (hp.x() == 0) {
 717                 QToolTip::hideText();
 718                 return;
 719         }
 720
 721         QString ann = get_annotation_at_point(hp);
 722
 723         assert(view);
 724
 725         if (!row_height_ || ann.isEmpty()) {
 726                 QToolTip::hideText();
 727                 return;
 728         }
 729
 730         const int hover_row = get_row_at_point(hp);
 731
 732         QFontMetrics m(QToolTip::font());
 733         const QRect text_size = m.boundingRect(QRect(), 0, ann);
 734
 735         // This is OS-specific and unfortunately we can't query it, so
 736         // use an approximation to at least try to minimize the error.
 737         const int padding = 8;
 738
 739         // Make sure the tool tip doesn't overlap with the mouse cursor.
 740         // If it did, the tool tip would constantly hide and re-appear.
 741         // We also push it up by one row so that it appears above the
 742         // decode trace, not below.
 743         QPoint p = hp;
 744         p.setX(hp.x() - (text_size.width() / 2) - padding);
 745
 746         p.setY(get_visual_y() - (row_height_ / 2) +
 747                 (hover_row * row_height_) -
 748                 row_height_ - text_size.height() - padding);
 749
 750         QToolTip::showText(view->viewport()->mapToGlobal(p), ann);
 751 }
 752
 753 void DecodeTrace::create_decoder_form(int index,
 754         shared_ptr<data::decode::Decoder> &dec, QWidget *parent,
 755         QFormLayout *form)
 756 {
 757         GlobalSettings settings;
 758
 759         assert(dec);
 760         const srd_decoder *const decoder = dec->decoder();
 761         assert(decoder);
 762
 763         const bool decoder_deletable = index > 0;
 764
 765         pv::widgets::DecoderGroupBox *const group =
 766                 new pv::widgets::DecoderGroupBox(
 767                         QString::fromUtf8(decoder->name),
 768                         tr("%1:\n%2").arg(QString::fromUtf8(decoder->longname),
 769                                 QString::fromUtf8(decoder->desc)),
 770                         nullptr, decoder_deletable);
 771         group->set_decoder_visible(dec->shown());
 772
 773         if (decoder_deletable) {
 774                 delete_mapper_.setMapping(group, index);
 775                 connect(group, SIGNAL(delete_decoder()), &delete_mapper_, SLOT(map()));
 776         }
 777
 778         show_hide_mapper_.setMapping(group, index);
 779         connect(group, SIGNAL(show_hide_decoder()),
 780                 &show_hide_mapper_, SLOT(map()));
 781
 782         QFormLayout *const decoder_form = new QFormLayout;
 783         group->add_layout(decoder_form);
 784
 785         const vector<DecodeChannel> channels = decode_signal_->get_channels();
 786
 787         // Add the channels
 788         for (DecodeChannel ch : channels) {
 789                 // Ignore channels not part of the decoder we create the form for
 790                 if (ch.decoder_ != dec)
 791                         continue;
 792
 793                 QComboBox *const combo = create_channel_selector(parent, &ch);
 794                 QComboBox *const combo_init_state = create_channel_selector_init_state(parent, &ch);
 795
 796                 channel_id_map_[combo] = ch.id;
 797                 init_state_map_[combo_init_state] = ch.id;
 798
 799                 connect(combo, SIGNAL(currentIndexChanged(int)),
 800                         this, SLOT(on_channel_selected(int)));
 801                 connect(combo_init_state, SIGNAL(currentIndexChanged(int)),
 802                         this, SLOT(on_init_state_changed(int)));
 803
 804                 QHBoxLayout *const hlayout = new QHBoxLayout;
 805                 hlayout->addWidget(combo);
 806                 hlayout->addWidget(combo_init_state);
 807
 808                 if (!settings.value(GlobalSettings::Key_Dec_InitialStateConfigurable).toBool())
 809                         combo_init_state->hide();
 810
 811                 const QString required_flag = ch.is_optional ? QString() : QString("*");
 812                 decoder_form->addRow(tr("<b>%1</b> (%2) %3")
 813                         .arg(ch.name, ch.desc, required_flag), hlayout);
 814         }
 815
 816         // Add the options
 817         shared_ptr<binding::Decoder> binding(
 818                 new binding::Decoder(decode_signal_, dec));
 819         binding->add_properties_to_form(decoder_form, true);
 820
 821         bindings_.push_back(binding);
 822
 823         form->addRow(group);
 824         decoder_forms_.push_back(group);
 825 }
 826
 827 QComboBox* DecodeTrace::create_channel_selector(QWidget *parent, const DecodeChannel *ch)
 828 {
 829         const auto sigs(session_.signalbases());
 830
 831         // Sort signals in natural order
 832         vector< shared_ptr<data::SignalBase> > sig_list(sigs.begin(), sigs.end());
 833         sort(sig_list.begin(), sig_list.end(),
 834                 [](const shared_ptr<data::SignalBase> &a,
 835                 const shared_ptr<data::SignalBase> &b) {
 836                         return strnatcasecmp(a->name().toStdString(),
 837                                 b->name().toStdString()) < 0; });
 838
 839         QComboBox *selector = new QComboBox(parent);
 840
 841         selector->addItem("-", qVariantFromValue((void*)nullptr));
 842
 843         if (!ch->assigned_signal)
 844                 selector->setCurrentIndex(0);
 845
 846         for (const shared_ptr<data::SignalBase> &b : sig_list) {
 847                 assert(b);
 848                 if (b->logic_data() && b->enabled()) {
 849                         selector->addItem(b->name(),
 850                                 qVariantFromValue((void*)b.get()));
 851
 852                         if (ch->assigned_signal == b.get())
 853                                 selector->setCurrentIndex(selector->count() - 1);
 854                 }
 855         }
 856
 857         return selector;
 858 }
 859
 860 QComboBox* DecodeTrace::create_channel_selector_init_state(QWidget *parent,
 861         const DecodeChannel *ch)
 862 {
 863         QComboBox *selector = new QComboBox(parent);
 864
 865         selector->addItem("0", qVariantFromValue((int)SRD_INITIAL_PIN_LOW));
 866         selector->addItem("1", qVariantFromValue((int)SRD_INITIAL_PIN_HIGH));
 867         selector->addItem("X", qVariantFromValue((int)SRD_INITIAL_PIN_SAME_AS_SAMPLE0));
 868
 869         selector->setCurrentIndex(ch->initial_pin_state);
 870
 871         selector->setToolTip("Initial (assumed) pin value before the first sample");
 872
 873         return selector;
 874 }
 875
 876 void DecodeTrace::on_new_annotations()
 877 {
 878         if (!delayed_trace_updater_.isActive())
 879                 delayed_trace_updater_.start();
 880 }
 881
 882 void DecodeTrace::on_delayed_trace_update()
 883 {
 884         if (owner_)
 885                 owner_->row_item_appearance_changed(false, true);
 886 }
 887
 888 void DecodeTrace::on_decode_reset()
 889 {
 890         visible_rows_.clear();
 891         max_visible_rows_ = 0;
 892
 893         if (owner_)
 894                 owner_->row_item_appearance_changed(false, true);
 895 }
 896
 897 void DecodeTrace::on_decode_finished()
 898 {
 899         if (owner_)
 900                 owner_->row_item_appearance_changed(false, true);
 901 }
 902
 903 void DecodeTrace::delete_pressed()
 904 {
 905         on_delete();
 906 }
 907
 908 void DecodeTrace::on_delete()
 909 {
 910         session_.remove_decode_signal(decode_signal_);
 911 }
 912
 913 void DecodeTrace::on_channel_selected(int)
 914 {
 915         QComboBox *cb = qobject_cast<QComboBox*>(QObject::sender());
 916
 917         // Determine signal that was selected
 918         const data::SignalBase *signal =
 919                 (data::SignalBase*)cb->itemData(cb->currentIndex()).value<void*>();
 920
 921         // Determine decode channel ID this combo box is the channel selector for
 922         const uint16_t id = channel_id_map_.at(cb);
 923
 924         decode_signal_->assign_signal(id, signal);
 925 }
 926
 927 void DecodeTrace::on_channels_updated()
 928 {
 929         if (owner_)
 930                 owner_->row_item_appearance_changed(false, true);
 931 }
 932
 933 void DecodeTrace::on_init_state_changed(int)
 934 {
 935         QComboBox *cb = qobject_cast<QComboBox*>(QObject::sender());
 936
 937         // Determine inital pin state that was selected
 938         int init_state = cb->itemData(cb->currentIndex()).value<int>();
 939
 940         // Determine decode channel ID this combo box is the channel selector for
 941         const uint16_t id = init_state_map_.at(cb);
 942
 943         decode_signal_->set_initial_pin_state(id, init_state);
 944 }
 945
 946 void DecodeTrace::on_stack_decoder(srd_decoder *decoder)
 947 {
 948         decode_signal_->stack_decoder(decoder);
 949
 950         create_popup_form();
 951 }
 952
 953 void DecodeTrace::on_delete_decoder(int index)
 954 {
 955         decode_signal_->remove_decoder(index);
 956
 957         // Force re-calculation of the trace height, see paint_mid()
 958         max_visible_rows_ = 0;
 959         owner_->extents_changed(false, true);
 960
 961         // Update the popup
 962         create_popup_form();
 963 }
 964
 965 void DecodeTrace::on_show_hide_decoder(int index)
 966 {
 967         const bool state = decode_signal_->toggle_decoder_visibility(index);
 968
 969         assert(index < (int)decoder_forms_.size());
 970         decoder_forms_[index]->set_decoder_visible(state);
 971
 972         if (!state) {
 973                 // Force re-calculation of the trace height, see paint_mid()
 974                 max_visible_rows_ = 0;
 975                 owner_->extents_changed(false, true);
 976         }
 977
 978         if (owner_)
 979                 owner_->row_item_appearance_changed(false, true);
 980 }
 981
 982 } // namespace trace
 983 } // namespace views
 984 } // namespace pv