pv/view/view.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, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
  19  */
  20
  21 #ifdef ENABLE_DECODE
  22 #include <libsigrokdecode/libsigrokdecode.h>
  23 #endif
  24
  25 #include <extdef.h>
  26
  27 #include <cassert>
  28 #include <climits>
  29 #include <cmath>
  30 #include <mutex>
  31 #include <unordered_set>
  32
  33 #include <QApplication>
  34 #include <QEvent>
  35 #include <QFontMetrics>
  36 #include <QMouseEvent>
  37 #include <QScrollBar>
  38
  39 #include <libsigrok/libsigrok.hpp>
  40
  41 #include "cursorheader.hpp"
  42 #include "decodetrace.hpp"
  43 #include "header.hpp"
  44 #include "logicsignal.hpp"
  45 #include "ruler.hpp"
  46 #include "signal.hpp"
  47 #include "tracegroup.hpp"
  48 #include "view.hpp"
  49 #include "viewport.hpp"
  50
  51 #include "pv/session.hpp"
  52 #include "pv/data/logic.hpp"
  53 #include "pv/data/logicsegment.hpp"
  54 #include "pv/util.hpp"
  55
  56 using boost::shared_lock;
  57 using boost::shared_mutex;
  58
  59 using pv::data::SignalData;
  60 using pv::data::Segment;
  61 using pv::util::format_time;
  62
  63 using std::deque;
  64 using std::dynamic_pointer_cast;
  65 using std::list;
  66 using std::lock_guard;
  67 using std::max;
  68 using std::make_pair;
  69 using std::min;
  70 using std::pair;
  71 using std::set;
  72 using std::shared_ptr;
  73 using std::unordered_map;
  74 using std::unordered_set;
  75 using std::vector;
  76 using std::weak_ptr;
  77
  78 namespace pv {
  79 namespace view {
  80
  81 const double View::MaxScale = 1e9;
  82 const double View::MinScale = 1e-15;
  83
  84 const int View::MaxScrollValue = INT_MAX / 2;
  85
  86 const int View::ScaleUnits[3] = {1, 2, 5};
  87
  88 const QColor View::CursorAreaColour(220, 231, 243);
  89
  90 const QSizeF View::LabelPadding(4, 0);
  91
  92 View::View(Session &session, QWidget *parent) :
  93         QAbstractScrollArea(parent),
  94         session_(session),
  95         viewport_(new Viewport(*this)),
  96         ruler_(new Ruler(*this)),
  97         cursorheader_(new CursorHeader(*this)),
  98         header_(new Header(*this)),
  99         scale_(1e-6),
 100         offset_(0),
 101         v_offset_(0),
 102         updating_scroll_(false),
 103         tick_period_(0.0),
 104         tick_prefix_(0),
 105         show_cursors_(false),
 106         cursors_(new CursorPair(*this)),
 107         next_flag_text_('A'),
 108         hover_point_(-1, -1)
 109 {
 110         connect(horizontalScrollBar(), SIGNAL(valueChanged(int)),
 111                 this, SLOT(h_scroll_value_changed(int)));
 112         connect(verticalScrollBar(), SIGNAL(valueChanged(int)),
 113                 this, SLOT(v_scroll_value_changed(int)));
 114
 115         connect(&session_, SIGNAL(signals_changed()),
 116                 this, SLOT(signals_changed()));
 117         connect(&session_, SIGNAL(capture_state_changed(int)),
 118                 this, SLOT(data_updated()));
 119         connect(&session_, SIGNAL(data_received()),
 120                 this, SLOT(data_updated()));
 121         connect(&session_, SIGNAL(frame_ended()),
 122                 this, SLOT(data_updated()));
 123
 124         connect(header_, SIGNAL(signals_moved()),
 125                 this, SLOT(on_signals_moved()));
 126
 127         connect(header_, SIGNAL(selection_changed()),
 128                 cursorheader_, SLOT(clear_selection()));
 129         connect(cursorheader_, SIGNAL(selection_changed()),
 130                 header_, SLOT(clear_selection()));
 131
 132         connect(header_, SIGNAL(selection_changed()),
 133                 this, SIGNAL(selection_changed()));
 134         connect(cursorheader_, SIGNAL(selection_changed()),
 135                 this, SIGNAL(selection_changed()));
 136
 137         connect(this, SIGNAL(hover_point_changed()),
 138                 this, SLOT(on_hover_point_changed()));
 139
 140         connect(&lazy_event_handler_, SIGNAL(timeout()),
 141                 this, SLOT(process_sticky_events()));
 142         lazy_event_handler_.setSingleShot(true);
 143
 144         setViewport(viewport_);
 145
 146         viewport_->installEventFilter(this);
 147         ruler_->installEventFilter(this);
 148         cursorheader_->installEventFilter(this);
 149         header_->installEventFilter(this);
 150
 151         // Trigger the initial event manually. The default device has signals
 152         // which were created before this object came into being
 153         signals_changed();
 154
 155         // make sure the transparent widgets are on the top
 156         cursorheader_->raise();
 157         header_->raise();
 158
 159         // Update the zoom state
 160         calculate_tick_spacing();
 161 }
 162
 163 Session& View::session()
 164 {
 165         return session_;
 166 }
 167
 168 const Session& View::session() const
 169 {
 170         return session_;
 171 }
 172
 173 View* View::view()
 174 {
 175         return this;
 176 }
 177
 178 const View* View::view() const
 179 {
 180         return this;
 181 }
 182
 183 Viewport* View::viewport()
 184 {
 185         return viewport_;
 186 }
 187
 188 const Viewport* View::viewport() const
 189 {
 190         return viewport_;
 191 }
 192
 193 vector< shared_ptr<TimeItem> > View::time_items() const
 194 {
 195         const vector<shared_ptr<Flag>> f(flags());
 196         vector<shared_ptr<TimeItem>> items(f.begin(), f.end());
 197         items.push_back(cursors_);
 198         items.push_back(cursors_->first());
 199         items.push_back(cursors_->second());
 200         return items;
 201 }
 202
 203 double View::scale() const
 204 {
 205         return scale_;
 206 }
 207
 208 double View::offset() const
 209 {
 210         return offset_;
 211 }
 212
 213 int View::owner_visual_v_offset() const
 214 {
 215         return -v_offset_;
 216 }
 217
 218 unsigned int View::depth() const
 219 {
 220         return 0;
 221 }
 222
 223 unsigned int View::tick_prefix() const
 224 {
 225         return tick_prefix_;
 226 }
 227
 228 double View::tick_period() const
 229 {
 230         return tick_period_;
 231 }
 232
 233 void View::zoom(double steps)
 234 {
 235         zoom(steps, viewport_->width() / 2);
 236 }
 237
 238 void View::zoom(double steps, int offset)
 239 {
 240         set_zoom(scale_ * pow(3.0/2.0, -steps), offset);
 241 }
 242
 243 void View::zoom_fit()
 244 {
 245         const pair<double, double> extents = get_time_extents();
 246         const double delta = extents.second - extents.first;
 247         if (delta < 1e-12)
 248                 return;
 249
 250         assert(viewport_);
 251         const int w = viewport_->width();
 252         if (w <= 0)
 253                 return;
 254
 255         const double scale = max(min(delta / w, MaxScale), MinScale);
 256         set_scale_offset(scale, extents.first);
 257 }
 258
 259 void View::zoom_one_to_one()
 260 {
 261         using pv::data::SignalData;
 262
 263         // Make a set of all the visible data objects
 264         set< shared_ptr<SignalData> > visible_data = get_visible_data();
 265         if (visible_data.empty())
 266                 return;
 267
 268         double samplerate = 0.0;
 269         for (const shared_ptr<SignalData> d : visible_data) {
 270                 assert(d);
 271                 const vector< shared_ptr<Segment> > segments =
 272                         d->segments();
 273                 for (const shared_ptr<Segment> &s : segments)
 274                         samplerate = max(samplerate, s->samplerate());
 275         }
 276
 277         if (samplerate == 0.0)
 278                 return;
 279
 280         assert(viewport_);
 281         const int w = viewport_->width();
 282         if (w <= 0)
 283                 return;
 284
 285         set_zoom(1.0 / samplerate, w / 2);
 286 }
 287
 288 void View::set_scale_offset(double scale, double offset)
 289 {
 290         scale_ = scale;
 291         offset_ = offset;
 292
 293         calculate_tick_spacing();
 294
 295         update_scroll();
 296         ruler_->update();
 297         cursorheader_->update();
 298         viewport_->update();
 299         scale_offset_changed();
 300 }
 301
 302 set< shared_ptr<SignalData> > View::get_visible_data() const
 303 {
 304         shared_lock<shared_mutex> lock(session().signals_mutex());
 305         const vector< shared_ptr<Signal> > &sigs(session().signals());
 306
 307         // Make a set of all the visible data objects
 308         set< shared_ptr<SignalData> > visible_data;
 309         for (const shared_ptr<Signal> sig : sigs)
 310                 if (sig->enabled())
 311                         visible_data.insert(sig->data());
 312
 313         return visible_data;
 314 }
 315
 316 pair<double, double> View::get_time_extents() const
 317 {
 318         double left_time = DBL_MAX, right_time = DBL_MIN;
 319         const set< shared_ptr<SignalData> > visible_data = get_visible_data();
 320         for (const shared_ptr<SignalData> d : visible_data)
 321         {
 322                 const vector< shared_ptr<Segment> > segments =
 323                         d->segments();
 324                 for (const shared_ptr<Segment> &s : segments) {
 325                         double samplerate = s->samplerate();
 326                         samplerate = (samplerate <= 0.0) ? 1.0 : samplerate;
 327
 328                         const double start_time = s->start_time();
 329                         left_time = min(left_time, start_time);
 330                         right_time = max(right_time, start_time +
 331                                 d->get_max_sample_count() / samplerate);
 332                 }
 333         }
 334
 335         if (left_time == DBL_MAX && right_time == DBL_MIN)
 336                 return make_pair(0.0, 0.0);
 337
 338         assert(left_time < right_time);
 339         return make_pair(left_time, right_time);
 340 }
 341
 342 bool View::cursors_shown() const
 343 {
 344         return show_cursors_;
 345 }
 346
 347 void View::show_cursors(bool show)
 348 {
 349         show_cursors_ = show;
 350         cursorheader_->update();
 351         viewport_->update();
 352 }
 353
 354 void View::centre_cursors()
 355 {
 356         const double time_width = scale_ * viewport_->width();
 357         cursors_->first()->set_time(offset_ + time_width * 0.4);
 358         cursors_->second()->set_time(offset_ + time_width * 0.6);
 359         cursorheader_->update();
 360         viewport_->update();
 361 }
 362
 363 std::shared_ptr<CursorPair> View::cursors() const
 364 {
 365         return cursors_;
 366 }
 367
 368 void View::add_flag(double time)
 369 {
 370         flags_.push_back(shared_ptr<Flag>(new Flag(*this, time,
 371                 QString("%1").arg(next_flag_text_))));
 372         next_flag_text_ = (next_flag_text_ >= 'Z') ? 'A' :
 373                 (next_flag_text_ + 1);
 374         time_item_appearance_changed(true, true);
 375 }
 376
 377 void View::remove_flag(std::shared_ptr<Flag> flag)
 378 {
 379         flags_.remove(flag);
 380         time_item_appearance_changed(true, true);
 381 }
 382
 383 vector< std::shared_ptr<Flag> > View::flags() const
 384 {
 385         vector< std::shared_ptr<Flag> > flags(flags_.begin(), flags_.end());
 386         stable_sort(flags.begin(), flags.end(),
 387                 [](const shared_ptr<Flag> &a, const shared_ptr<Flag> &b) {
 388                         return a->time() < b->time();
 389                 });
 390
 391         return flags;
 392 }
 393
 394 const QPoint& View::hover_point() const
 395 {
 396         return hover_point_;
 397 }
 398
 399 void View::update_viewport()
 400 {
 401         assert(viewport_);
 402         viewport_->update();
 403         header_->update();
 404 }
 405
 406 void View::restack_all_row_items()
 407 {
 408         // Make a set of owners
 409         unordered_set< RowItemOwner* > owners;
 410         for (const auto &r : *this)
 411                 owners.insert(r->owner());
 412
 413         // Make a list that is sorted from deepest first
 414         vector< RowItemOwner* > sorted_owners(owners.begin(), owners.end());
 415         sort(sorted_owners.begin(), sorted_owners.end(),
 416                 [](const RowItemOwner* a, const RowItemOwner *b) {
 417                         return a->depth() > b->depth(); });
 418
 419         // Restack the items recursively
 420         for (auto &o : sorted_owners)
 421                 o->restack_items();
 422
 423         // Animate the items to their destination
 424         for (const auto &r : *this)
 425                 r->animate_to_layout_v_offset();
 426 }
 427
 428 void View::get_scroll_layout(double &length, double &offset) const
 429 {
 430         const pair<double, double> extents = get_time_extents();
 431         length = (extents.second - extents.first) / scale_;
 432         offset = offset_ / scale_;
 433 }
 434
 435 void View::set_zoom(double scale, int offset)
 436 {
 437         const double cursor_offset = offset_ + scale_ * offset;
 438         const double new_scale = max(min(scale, MaxScale), MinScale);
 439         const double new_offset = cursor_offset - new_scale * offset;
 440         set_scale_offset(new_scale, new_offset);
 441 }
 442
 443 void View::calculate_tick_spacing()
 444 {
 445         const double SpacingIncrement = 32.0f;
 446         const double MinValueSpacing = 32.0f;
 447
 448         double min_width = SpacingIncrement, typical_width;
 449
 450         QFontMetrics m(QApplication::font());
 451
 452         do {
 453                 const double min_period = scale_ * min_width;
 454
 455                 const int order = (int)floorf(log10f(min_period));
 456                 const double order_decimal = pow(10.0, order);
 457
 458                 unsigned int unit = 0;
 459
 460                 do {
 461                         tick_period_ = order_decimal * ScaleUnits[unit++];
 462                 } while (tick_period_ < min_period &&
 463                         unit < countof(ScaleUnits));
 464
 465                 tick_prefix_ = (order - pv::util::FirstSIPrefixPower) / 3;
 466
 467                 typical_width = m.boundingRect(0, 0, INT_MAX, INT_MAX,
 468                         Qt::AlignLeft | Qt::AlignTop,
 469                         format_time(offset_, tick_prefix_)).width() +
 470                                 MinValueSpacing;
 471
 472                 min_width += SpacingIncrement;
 473
 474         } while(typical_width > tick_period_ / scale_);
 475 }
 476
 477 void View::update_scroll()
 478 {
 479         assert(viewport_);
 480
 481         const QSize areaSize = viewport_->size();
 482
 483         // Set the horizontal scroll bar
 484         double length = 0, offset = 0;
 485         get_scroll_layout(length, offset);
 486         length = max(length - areaSize.width(), 0.0);
 487
 488         int major_tick_distance = tick_period_ / scale_;
 489
 490         horizontalScrollBar()->setPageStep(areaSize.width() / 2);
 491         horizontalScrollBar()->setSingleStep(major_tick_distance);
 492
 493         updating_scroll_ = true;
 494
 495         if (length < MaxScrollValue) {
 496                 horizontalScrollBar()->setRange(0, length);
 497                 horizontalScrollBar()->setSliderPosition(offset);
 498         } else {
 499                 horizontalScrollBar()->setRange(0, MaxScrollValue);
 500                 horizontalScrollBar()->setSliderPosition(
 501                         offset_ * MaxScrollValue / (scale_ * length));
 502         }
 503
 504         updating_scroll_ = false;
 505
 506         // Set the vertical scrollbar
 507         verticalScrollBar()->setPageStep(areaSize.height());
 508         verticalScrollBar()->setSingleStep(areaSize.height() / 8);
 509
 510         const pair<int, int> extents = v_extents();
 511         verticalScrollBar()->setRange(extents.first - (areaSize.height() / 2),
 512                 extents.second - (areaSize.height() / 2));
 513 }
 514
 515 void View::update_layout()
 516 {
 517         setViewportMargins(
 518                 header_->sizeHint().width() - pv::view::Header::BaselineOffset,
 519                 ruler_->sizeHint().height(), 0, 0);
 520         ruler_->setGeometry(viewport_->x(), 0,
 521                 viewport_->width(), viewport_->y());
 522         cursorheader_->setGeometry(
 523                 viewport_->x(),
 524                 ruler_->sizeHint().height() - cursorheader_->sizeHint().height() / 2,
 525                 viewport_->width(), cursorheader_->sizeHint().height());
 526         header_->setGeometry(0, viewport_->y(),
 527                 header_->sizeHint().width(), viewport_->height());
 528         update_scroll();
 529 }
 530
 531 void View::paint_label(QPainter &p, const QRect &rect, bool hover)
 532 {
 533         (void)p;
 534         (void)rect;
 535         (void)hover;
 536 }
 537
 538 QRectF View::label_rect(const QRectF &rect)
 539 {
 540         (void)rect;
 541         return QRectF();
 542 }
 543
 544 bool View::add_channels_to_owner(
 545         const vector< shared_ptr<sigrok::Channel> > &channels,
 546         RowItemOwner *owner, int &offset,
 547         unordered_map<shared_ptr<sigrok::Channel>, shared_ptr<Signal> >
 548                 &signal_map,
 549         std::function<bool (shared_ptr<RowItem>)> filter_func)
 550 {
 551         bool any_added = false;
 552
 553         assert(owner);
 554
 555         for (const auto &channel : channels)
 556         {
 557                 const auto iter = signal_map.find(channel);
 558                 if (iter == signal_map.end() ||
 559                         (filter_func && !filter_func((*iter).second)))
 560                         continue;
 561
 562                 shared_ptr<RowItem> row_item = (*iter).second;
 563                 owner->add_child_item(row_item);
 564                 apply_offset(row_item, offset);
 565                 signal_map.erase(iter);
 566
 567                 any_added = true;
 568         }
 569
 570         return any_added;
 571 }
 572
 573 void View::apply_offset(shared_ptr<RowItem> row_item, int &offset) {
 574         assert(row_item);
 575         const pair<int, int> extents = row_item->v_extents();
 576         if (row_item->enabled())
 577                 offset += -extents.first;
 578         row_item->force_to_v_offset(offset);
 579         if (row_item->enabled())
 580                 offset += extents.second;
 581 }
 582
 583 bool View::eventFilter(QObject *object, QEvent *event)
 584 {
 585         const QEvent::Type type = event->type();
 586         if (type == QEvent::MouseMove) {
 587
 588                 const QMouseEvent *const mouse_event = (QMouseEvent*)event;
 589                 if (object == viewport_)
 590                         hover_point_ = mouse_event->pos();
 591                 else if (object == ruler_ || object == cursorheader_)
 592                         hover_point_ = QPoint(mouse_event->x(), 0);
 593                 else if (object == header_)
 594                         hover_point_ = QPoint(0, mouse_event->y());
 595                 else
 596                         hover_point_ = QPoint(-1, -1);
 597
 598                 hover_point_changed();
 599
 600         } else if (type == QEvent::Leave) {
 601                 hover_point_ = QPoint(-1, -1);
 602                 hover_point_changed();
 603         }
 604
 605         return QObject::eventFilter(object, event);
 606 }
 607
 608 bool View::viewportEvent(QEvent *e)
 609 {
 610         switch(e->type()) {
 611         case QEvent::Paint:
 612         case QEvent::MouseButtonPress:
 613         case QEvent::MouseButtonRelease:
 614         case QEvent::MouseButtonDblClick:
 615         case QEvent::MouseMove:
 616         case QEvent::Wheel:
 617         case QEvent::TouchBegin:
 618         case QEvent::TouchUpdate:
 619         case QEvent::TouchEnd:
 620                 return false;
 621
 622         default:
 623                 return QAbstractScrollArea::viewportEvent(e);
 624         }
 625 }
 626
 627 void View::resizeEvent(QResizeEvent*)
 628 {
 629         update_layout();
 630 }
 631
 632 void View::row_item_appearance_changed(bool label, bool content)
 633 {
 634         if (label)
 635                 header_->update();
 636         if (content)
 637                 viewport_->update();
 638 }
 639
 640 void View::time_item_appearance_changed(bool label, bool content)
 641 {
 642         if (label)
 643                 cursorheader_->update();
 644         if (content)
 645                 viewport_->update();
 646 }
 647
 648 void View::extents_changed(bool horz, bool vert)
 649 {
 650         sticky_events_ |=
 651                 (horz ? RowItemHExtentsChanged : 0) |
 652                 (vert ? RowItemVExtentsChanged : 0);
 653         lazy_event_handler_.start();
 654 }
 655
 656 void View::h_scroll_value_changed(int value)
 657 {
 658         if (updating_scroll_)
 659                 return;
 660
 661         const int range = horizontalScrollBar()->maximum();
 662         if (range < MaxScrollValue)
 663                 offset_ = scale_ * value;
 664         else {
 665                 double length = 0, offset;
 666                 get_scroll_layout(length, offset);
 667                 offset_ = scale_ * length * value / MaxScrollValue;
 668         }
 669
 670         ruler_->update();
 671         cursorheader_->update();
 672         viewport_->update();
 673 }
 674
 675 void View::v_scroll_value_changed(int value)
 676 {
 677         v_offset_ = value;
 678         header_->update();
 679         viewport_->update();
 680 }
 681
 682 void View::signals_changed()
 683 {
 684         int offset = 0;
 685
 686         // Populate the traces
 687         clear_child_items();
 688
 689         shared_ptr<sigrok::Device> device = session_.device();
 690         assert(device);
 691
 692         // Collect a set of signals
 693         unordered_map<shared_ptr<sigrok::Channel>, shared_ptr<Signal> >
 694                 signal_map;
 695
 696         shared_lock<shared_mutex> lock(session_.signals_mutex());
 697         const vector< shared_ptr<Signal> > &sigs(session_.signals());
 698
 699         for (const shared_ptr<Signal> &sig : sigs)
 700                 signal_map[sig->channel()] = sig;
 701
 702         // Populate channel groups
 703         for (auto entry : device->channel_groups())
 704         {
 705                 const shared_ptr<sigrok::ChannelGroup> &group = entry.second;
 706
 707                 if (group->channels().size() <= 1)
 708                         continue;
 709
 710                 shared_ptr<TraceGroup> trace_group(new TraceGroup());
 711                 int child_offset = 0;
 712                 if (add_channels_to_owner(group->channels(),
 713                         trace_group.get(), child_offset, signal_map))
 714                 {
 715                         add_child_item(trace_group);
 716                         apply_offset(trace_group, offset);
 717                 }
 718         }
 719
 720         // Add the remaining logic channels
 721         shared_ptr<TraceGroup> logic_trace_group(new TraceGroup());
 722         int child_offset = 0;
 723
 724         if (add_channels_to_owner(device->channels(),
 725                 logic_trace_group.get(), child_offset, signal_map,
 726                 [](shared_ptr<RowItem> r) -> bool {
 727                         return dynamic_pointer_cast<LogicSignal>(r) != nullptr;
 728                         }))
 729
 730         {
 731                 add_child_item(logic_trace_group);
 732                 apply_offset(logic_trace_group, offset);
 733         }
 734
 735         // Add the remaining channels
 736         add_channels_to_owner(device->channels(), this, offset, signal_map);
 737         assert(signal_map.empty());
 738
 739         // Add decode signals
 740 #ifdef ENABLE_DECODE
 741         const vector< shared_ptr<DecodeTrace> > decode_sigs(
 742                 session().get_decode_signals());
 743         for (auto s : decode_sigs) {
 744                 add_child_item(s);
 745                 apply_offset(s, offset);
 746         }
 747 #endif
 748
 749         update_layout();
 750 }
 751
 752 void View::data_updated()
 753 {
 754         // Update the scroll bars
 755         update_scroll();
 756
 757         // Repaint the view
 758         viewport_->update();
 759 }
 760
 761 void View::on_signals_moved()
 762 {
 763         update_scroll();
 764         signals_moved();
 765 }
 766
 767 void View::process_sticky_events()
 768 {
 769         if (sticky_events_ & RowItemHExtentsChanged)
 770                 update_layout();
 771         if (sticky_events_ & RowItemVExtentsChanged)
 772                 restack_all_row_items();
 773
 774         // Clear the sticky events
 775         sticky_events_ = 0;
 776 }
 777
 778 void View::on_hover_point_changed()
 779 {
 780         for (shared_ptr<RowItem> r : *this)
 781                 r->hover_point_changed();
 782 }
 783
 784 } // namespace view
 785 } // namespace pv