2 * This file is part of the PulseView project.
4 * Copyright (C) 2012 Joel Holdsworth <joel@airwebreathe.org.uk>
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.
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.
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/>.
21 #include <libsigrokdecode/libsigrokdecode.h>
32 #include <unordered_set>
34 #include <boost/archive/text_iarchive.hpp>
35 #include <boost/archive/text_oarchive.hpp>
36 #include <boost/serialization/serialization.hpp>
38 #include <QApplication>
40 #include <QFontMetrics>
42 #include <QMouseEvent>
44 #include <QVBoxLayout>
46 #include <libsigrokcxx/libsigrokcxx.hpp>
48 #include "analogsignal.hpp"
50 #include "logicsignal.hpp"
53 #include "tracegroup.hpp"
54 #include "triggermarker.hpp"
56 #include "viewport.hpp"
58 #include "pv/data/logic.hpp"
59 #include "pv/data/logicsegment.hpp"
60 #include "pv/devices/device.hpp"
61 #include "pv/globalsettings.hpp"
62 #include "pv/session.hpp"
63 #include "pv/util.hpp"
66 #include "decodetrace.hpp"
69 using pv::data::SignalData;
70 using pv::data::Segment;
71 using pv::util::TimeUnit;
72 using pv::util::Timestamp;
74 using std::back_inserter;
80 using std::make_shared;
82 using std::numeric_limits;
85 using std::set_difference;
86 using std::shared_ptr;
87 using std::stringstream;
88 using std::unordered_map;
89 using std::unordered_set;
96 const Timestamp View::MaxScale("1e9");
97 const Timestamp View::MinScale("1e-12");
99 const int View::MaxScrollValue = INT_MAX / 2;
101 const int View::ScaleUnits[3] = {1, 2, 5};
104 CustomScrollArea::CustomScrollArea(QWidget *parent) :
105 QAbstractScrollArea(parent)
109 bool CustomScrollArea::viewportEvent(QEvent *event)
111 switch (event->type()) {
113 case QEvent::MouseButtonPress:
114 case QEvent::MouseButtonRelease:
115 case QEvent::MouseButtonDblClick:
116 case QEvent::MouseMove:
118 case QEvent::TouchBegin:
119 case QEvent::TouchUpdate:
120 case QEvent::TouchEnd:
123 return QAbstractScrollArea::viewportEvent(event);
127 View::View(Session &session, bool is_main_view, QWidget *parent) :
128 ViewBase(session, is_main_view, parent),
130 // Note: Place defaults in View::reset_view_state(), not here
131 splitter_(new QSplitter()),
132 header_was_shrunk_(false), // The splitter remains unchanged after a reset, so this goes here
133 sticky_scrolling_(false) // Default setting is set in MainWindow::setup_ui()
135 QVBoxLayout *root_layout = new QVBoxLayout(this);
136 root_layout->setContentsMargins(0, 0, 0, 0);
137 root_layout->addWidget(splitter_);
139 viewport_ = new Viewport(*this);
140 scrollarea_ = new CustomScrollArea(splitter_);
141 scrollarea_->setViewport(viewport_);
142 scrollarea_->setFrameShape(QFrame::NoFrame);
144 ruler_ = new Ruler(*this);
146 header_ = new Header(*this);
147 header_->setMinimumWidth(10); // So that the arrow tips show at least
149 // We put the header into a simple layout so that we can add the top margin,
150 // allowing us to make it line up with the bottom of the ruler
151 QWidget *header_container = new QWidget();
152 header_container->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
153 QVBoxLayout *header_layout = new QVBoxLayout(header_container);
154 header_layout->setContentsMargins(0, ruler_->sizeHint().height(), 0, 0);
155 header_layout->addWidget(header_);
157 // To let the ruler and scrollarea be on the same split pane, we need a layout
158 QWidget *trace_container = new QWidget();
159 trace_container->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
160 QVBoxLayout *trace_layout = new QVBoxLayout(trace_container);
161 trace_layout->setSpacing(0); // We don't want space between the ruler and scrollarea
162 trace_layout->setContentsMargins(0, 0, 0, 0);
163 trace_layout->addWidget(ruler_);
164 trace_layout->addWidget(scrollarea_);
166 splitter_->addWidget(header_container);
167 splitter_->addWidget(trace_container);
168 splitter_->setHandleWidth(1); // Don't show a visible rubber band
169 splitter_->setCollapsible(0, false); // Prevent the header from collapsing
170 splitter_->setCollapsible(1, false); // Prevent the traces from collapsing
171 splitter_->setStretchFactor(0, 0); // Prevent the panes from being resized
172 splitter_->setStretchFactor(1, 1); // when the entire view is resized
173 splitter_->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
175 viewport_->installEventFilter(this);
176 ruler_->installEventFilter(this);
177 header_->installEventFilter(this);
179 // Set up settings and event handlers
180 GlobalSettings settings;
181 colored_bg_ = settings.value(GlobalSettings::Key_View_ColoredBG).toBool();
182 snap_distance_ = settings.value(GlobalSettings::Key_View_SnapDistance).toInt();
184 GlobalSettings::add_change_handler(this);
186 connect(scrollarea_->horizontalScrollBar(), SIGNAL(valueChanged(int)),
187 this, SLOT(h_scroll_value_changed(int)));
188 connect(scrollarea_->verticalScrollBar(), SIGNAL(valueChanged(int)),
189 this, SLOT(v_scroll_value_changed()));
191 connect(header_, SIGNAL(selection_changed()),
192 ruler_, SLOT(clear_selection()));
193 connect(ruler_, SIGNAL(selection_changed()),
194 header_, SLOT(clear_selection()));
196 connect(header_, SIGNAL(selection_changed()),
197 this, SIGNAL(selection_changed()));
198 connect(ruler_, SIGNAL(selection_changed()),
199 this, SIGNAL(selection_changed()));
201 connect(splitter_, SIGNAL(splitterMoved(int, int)),
202 this, SLOT(on_splitter_moved()));
204 connect(&lazy_event_handler_, SIGNAL(timeout()),
205 this, SLOT(process_sticky_events()));
206 lazy_event_handler_.setSingleShot(true);
208 // Trigger the initial event manually. The default device has signals
209 // which were created before this object came into being
212 // make sure the transparent widgets are on the top
221 GlobalSettings::remove_change_handler(this);
224 void View::reset_view_state()
226 ViewBase::reset_view_state();
228 segment_display_mode_ = Trace::ShowLastSegmentOnly;
229 segment_selectable_ = false;
233 updating_scroll_ = false;
234 settings_restored_ = false;
235 always_zoom_to_fit_ = false;
237 tick_prefix_ = pv::util::SIPrefix::yocto;
239 time_unit_ = util::TimeUnit::Time;
240 show_cursors_ = false;
241 cursors_ = make_shared<CursorPair>(*this);
242 next_flag_text_ = 'A';
243 trigger_markers_.clear();
244 hover_widget_ = nullptr;
245 hover_point_ = QPoint(-1, -1);
246 scroll_needs_defaults_ = true;
248 scale_at_acq_start_ = 0;
249 offset_at_acq_start_ = 0;
250 suppress_zoom_to_fit_after_acq_ = false;
252 show_cursors_ = false;
253 cursor_state_changed(show_cursors_);
256 // Update the zoom state
257 calculate_tick_spacing();
259 // Make sure the standard bar's segment selector is in sync
260 set_segment_display_mode(segment_display_mode_);
263 Session& View::session()
268 const Session& View::session() const
273 unordered_set< shared_ptr<Signal> > View::signals() const
278 void View::clear_signals()
280 ViewBase::clear_signalbases();
284 void View::add_signal(const shared_ptr<Signal> signal)
286 ViewBase::add_signalbase(signal->base());
287 signals_.insert(signal);
289 signal->set_segment_display_mode(segment_display_mode_);
290 signal->set_current_segment(current_segment_);
292 connect(signal->base().get(), SIGNAL(name_changed(const QString&)),
293 this, SLOT(on_signal_name_changed()));
297 void View::clear_decode_signals()
299 decode_traces_.clear();
302 void View::add_decode_signal(shared_ptr<data::DecodeSignal> signal)
304 shared_ptr<DecodeTrace> d(
305 new DecodeTrace(session_, signal, decode_traces_.size()));
306 decode_traces_.push_back(d);
308 d->set_segment_display_mode(segment_display_mode_);
309 d->set_current_segment(current_segment_);
311 connect(signal.get(), SIGNAL(name_changed(const QString&)),
312 this, SLOT(on_signal_name_changed()));
315 void View::remove_decode_signal(shared_ptr<data::DecodeSignal> signal)
317 for (auto i = decode_traces_.begin(); i != decode_traces_.end(); i++)
318 if ((*i)->base() == signal) {
319 decode_traces_.erase(i);
326 shared_ptr<Signal> View::get_signal_under_mouse_cursor() const
328 return signal_under_mouse_cursor_;
336 const View* View::view() const
341 Viewport* View::viewport()
346 const Viewport* View::viewport() const
351 const Ruler* View::ruler() const
356 void View::save_settings(QSettings &settings) const
358 settings.setValue("scale", scale_);
359 settings.setValue("v_offset",
360 scrollarea_->verticalScrollBar()->sliderPosition());
362 settings.setValue("splitter_state", splitter_->saveState());
363 settings.setValue("segment_display_mode", segment_display_mode_);
367 boost::archive::text_oarchive oa(ss);
368 oa << boost::serialization::make_nvp("offset", offset_);
369 settings.setValue("offset", QString::fromStdString(ss.str()));
372 for (const shared_ptr<Signal>& signal : signals_) {
373 settings.beginGroup(signal->base()->internal_name());
374 signal->save_settings(settings);
379 void View::restore_settings(QSettings &settings)
381 // Note: It is assumed that this function is only called once,
382 // immediately after restoring a previous session.
384 if (settings.contains("scale"))
385 set_scale(settings.value("scale").toDouble());
387 if (settings.contains("offset")) {
388 util::Timestamp offset;
390 ss << settings.value("offset").toString().toStdString();
393 boost::archive::text_iarchive ia(ss);
394 ia >> boost::serialization::make_nvp("offset", offset);
395 // This also updates ruler_offset_
397 } catch (boost::archive::archive_exception&) {
398 qDebug() << "Could not restore the view offset";
402 if (settings.contains("splitter_state"))
403 splitter_->restoreState(settings.value("splitter_state").toByteArray());
405 if (settings.contains("segment_display_mode"))
406 set_segment_display_mode(
407 (Trace::SegmentDisplayMode)(settings.value("segment_display_mode").toInt()));
409 for (shared_ptr<Signal> signal : signals_) {
410 settings.beginGroup(signal->base()->internal_name());
411 signal->restore_settings(settings);
415 if (settings.contains("v_offset")) {
416 saved_v_offset_ = settings.value("v_offset").toInt();
417 set_v_offset(saved_v_offset_);
418 scroll_needs_defaults_ = false;
419 // Note: see eventFilter() for additional information
422 settings_restored_ = true;
423 suppress_zoom_to_fit_after_acq_ = true;
425 // Update the ruler so that it uses the new scale
426 calculate_tick_spacing();
429 vector< shared_ptr<TimeItem> > View::time_items() const
431 const vector<shared_ptr<Flag>> f(flags());
432 vector<shared_ptr<TimeItem>> items(f.begin(), f.end());
435 items.push_back(cursors_);
436 items.push_back(cursors_->first());
437 items.push_back(cursors_->second());
440 for (auto& trigger_marker : trigger_markers_)
441 items.push_back(trigger_marker);
446 shared_ptr<TimeItem> View::get_reference_time_item()
448 return ruler_->get_reference_item();
451 double View::scale() const
456 void View::set_scale(double scale)
458 if (scale_ != scale) {
464 void View::set_offset(const pv::util::Timestamp& offset, bool force_update)
466 if ((offset_ != offset) || force_update) {
468 ruler_offset_ = offset_ + zero_offset_;
473 const Timestamp& View::offset() const
478 const Timestamp& View::ruler_offset() const
480 return ruler_offset_;
483 void View::set_zero_position(const pv::util::Timestamp& position)
485 zero_offset_ = -position;
487 // Force an immediate update of the offsets
488 set_offset(offset_, true);
492 void View::reset_zero_position()
496 // Force an immediate update of the offsets
497 set_offset(offset_, true);
501 pv::util::Timestamp View::zero_offset() const
506 int View::owner_visual_v_offset() const
508 return -scrollarea_->verticalScrollBar()->sliderPosition();
511 void View::set_v_offset(int offset)
513 scrollarea_->verticalScrollBar()->setSliderPosition(offset);
518 unsigned int View::depth() const
523 uint32_t View::current_segment() const
525 return current_segment_;
528 pv::util::SIPrefix View::tick_prefix() const
533 void View::set_tick_prefix(pv::util::SIPrefix tick_prefix)
535 if (tick_prefix_ != tick_prefix) {
536 tick_prefix_ = tick_prefix;
537 tick_prefix_changed();
541 unsigned int View::tick_precision() const
543 return tick_precision_;
546 void View::set_tick_precision(unsigned tick_precision)
548 if (tick_precision_ != tick_precision) {
549 tick_precision_ = tick_precision;
550 tick_precision_changed();
554 const pv::util::Timestamp& View::tick_period() const
559 unsigned int View::minor_tick_count() const
561 return minor_tick_count_;
564 void View::set_tick_period(const pv::util::Timestamp& tick_period)
566 if (tick_period_ != tick_period) {
567 tick_period_ = tick_period;
568 tick_period_changed();
572 TimeUnit View::time_unit() const
577 void View::set_time_unit(pv::util::TimeUnit time_unit)
579 if (time_unit_ != time_unit) {
580 time_unit_ = time_unit;
585 void View::set_current_segment(uint32_t segment_id)
587 current_segment_ = segment_id;
589 for (const shared_ptr<Signal>& signal : signals_)
590 signal->set_current_segment(current_segment_);
592 for (shared_ptr<DecodeTrace>& dt : decode_traces_)
593 dt->set_current_segment(current_segment_);
596 vector<util::Timestamp> triggers = session_.get_triggers(current_segment_);
598 trigger_markers_.clear();
599 for (util::Timestamp timestamp : triggers)
600 trigger_markers_.push_back(make_shared<TriggerMarker>(*this, timestamp));
602 // When enabled, the first trigger for this segment is used as the zero position
603 GlobalSettings settings;
604 bool trigger_is_zero_time = settings.value(GlobalSettings::Key_View_TriggerIsZeroTime).toBool();
606 if (trigger_is_zero_time && (triggers.size() > 0))
607 set_zero_position(triggers.front());
611 segment_changed(segment_id);
614 bool View::segment_is_selectable() const
616 return segment_selectable_;
619 Trace::SegmentDisplayMode View::segment_display_mode() const
621 return segment_display_mode_;
624 void View::set_segment_display_mode(Trace::SegmentDisplayMode mode)
626 segment_display_mode_ = mode;
628 for (const shared_ptr<Signal>& signal : signals_)
629 signal->set_segment_display_mode(mode);
631 uint32_t last_segment = session_.get_segment_count() - 1;
634 case Trace::ShowLastSegmentOnly:
635 if (current_segment_ != last_segment)
636 set_current_segment(last_segment);
639 case Trace::ShowLastCompleteSegmentOnly:
640 // Do nothing if we only have one segment so far
641 if (last_segment > 0) {
642 // If the last segment isn't complete, the previous one must be
643 uint32_t segment_id =
644 (session_.all_segments_complete(last_segment)) ?
645 last_segment : last_segment - 1;
647 if (current_segment_ != segment_id)
648 set_current_segment(segment_id);
652 case Trace::ShowSingleSegmentOnly:
653 case Trace::ShowAllSegments:
654 case Trace::ShowAccumulatedIntensity:
656 // Current segment remains as-is
660 segment_selectable_ = true;
662 if ((mode == Trace::ShowAllSegments) || (mode == Trace::ShowAccumulatedIntensity))
663 segment_selectable_ = false;
667 segment_display_mode_changed((int)mode, segment_selectable_);
670 void View::zoom(double steps)
672 zoom(steps, viewport_->width() / 2);
675 void View::zoom(double steps, int offset)
677 set_zoom(scale_ * pow(3.0 / 2.0, -steps), offset);
680 void View::zoom_fit(bool gui_state)
682 // Act as one-shot when stopped, toggle along with the GUI otherwise
683 if (session_.get_capture_state() == Session::Stopped) {
684 always_zoom_to_fit_ = false;
685 always_zoom_to_fit_changed(false);
687 always_zoom_to_fit_ = gui_state;
688 always_zoom_to_fit_changed(gui_state);
691 const pair<Timestamp, Timestamp> extents = get_time_extents();
692 const Timestamp delta = extents.second - extents.first;
693 if (delta < Timestamp("1e-12"))
697 const int w = viewport_->width();
701 const Timestamp scale = max(min(delta / w, MaxScale), MinScale);
702 set_scale_offset(scale.convert_to<double>(), extents.first);
705 void View::set_scale_offset(double scale, const Timestamp& offset)
707 // Disable sticky scrolling / always zoom to fit when acquisition runs
708 // and user drags the viewport
709 if ((scale_ == scale) && (offset_ != offset) &&
710 (session_.get_capture_state() == Session::Running)) {
712 if (sticky_scrolling_) {
713 sticky_scrolling_ = false;
714 sticky_scrolling_changed(false);
717 if (always_zoom_to_fit_) {
718 always_zoom_to_fit_ = false;
719 always_zoom_to_fit_changed(false);
726 calculate_tick_spacing();
733 set< shared_ptr<SignalData> > View::get_visible_data() const
735 // Make a set of all the visible data objects
736 set< shared_ptr<SignalData> > visible_data;
737 for (const shared_ptr<Signal>& sig : signals_)
739 visible_data.insert(sig->data());
744 pair<Timestamp, Timestamp> View::get_time_extents() const
746 boost::optional<Timestamp> left_time, right_time;
747 const set< shared_ptr<SignalData> > visible_data = get_visible_data();
748 for (const shared_ptr<SignalData>& d : visible_data) {
749 const vector< shared_ptr<Segment> > segments = d->segments();
750 for (const shared_ptr<Segment>& s : segments) {
751 double samplerate = s->samplerate();
752 samplerate = (samplerate <= 0.0) ? 1.0 : samplerate;
754 const Timestamp start_time = s->start_time();
755 left_time = left_time ?
756 min(*left_time, start_time) :
758 right_time = right_time ?
759 max(*right_time, start_time + d->max_sample_count() / samplerate) :
760 start_time + d->max_sample_count() / samplerate;
764 if (!left_time || !right_time)
765 return make_pair(0, 0);
767 assert(*left_time < *right_time);
768 return make_pair(*left_time, *right_time);
771 void View::enable_show_sampling_points(bool state)
778 void View::enable_show_analog_minor_grid(bool state)
785 void View::enable_colored_bg(bool state)
791 bool View::colored_bg() const
796 bool View::cursors_shown() const
798 return show_cursors_;
801 void View::show_cursors(bool show)
803 if (show_cursors_ != show) {
804 show_cursors_ = show;
806 cursor_state_changed(show);
812 void View::set_cursors(pv::util::Timestamp& first, pv::util::Timestamp& second)
816 cursors_->first()->set_time(first);
817 cursors_->second()->set_time(second);
823 void View::centre_cursors()
827 const double time_width = scale_ * viewport_->width();
828 cursors_->first()->set_time(offset_ + time_width * 0.4);
829 cursors_->second()->set_time(offset_ + time_width * 0.6);
835 shared_ptr<CursorPair> View::cursors() const
840 shared_ptr<Flag> View::add_flag(const Timestamp& time)
842 shared_ptr<Flag> flag = make_shared<Flag>(
843 *this, time, QString("%1").arg(next_flag_text_));
844 flags_.push_back(flag);
846 next_flag_text_ = (next_flag_text_ >= 'Z') ? 'A' :
847 (next_flag_text_ + 1);
849 time_item_appearance_changed(true, true);
853 void View::remove_flag(shared_ptr<Flag> flag)
856 time_item_appearance_changed(true, true);
859 vector< shared_ptr<Flag> > View::flags() const
861 vector< shared_ptr<Flag> > flags(flags_.begin(), flags_.end());
862 stable_sort(flags.begin(), flags.end(),
863 [](const shared_ptr<Flag> &a, const shared_ptr<Flag> &b) {
864 return a->time() < b->time();
870 const QPoint& View::hover_point() const
875 const QWidget* View::hover_widget() const
877 return hover_widget_;
880 int64_t View::get_nearest_level_change(const QPoint &p)
882 // Is snapping disabled?
883 if (snap_distance_ == 0)
887 entry_t(shared_ptr<Signal> s) :
888 signal(s), delta(numeric_limits<int64_t>::max()), sample(-1), is_dense(false) {}
889 shared_ptr<Signal> signal;
895 vector<entry_t> list;
897 // Create list of signals to consider
898 if (signal_under_mouse_cursor_)
899 list.emplace_back(signal_under_mouse_cursor_);
901 for (shared_ptr<Signal> s : signals_) {
905 list.emplace_back(s);
908 // Get data for listed signals
909 for (entry_t &e : list) {
910 // Calculate sample number from cursor position
911 const double samples_per_pixel = e.signal->base()->get_samplerate() * scale();
912 const int64_t x_offset = offset().convert_to<double>() / scale();
913 const int64_t sample_num = max(((x_offset + p.x()) * samples_per_pixel), 0.0);
915 vector<data::LogicSegment::EdgePair> edges =
916 e.signal->get_nearest_level_changes(sample_num);
922 const int64_t first_sample_delta = abs(sample_num - edges.front().first);
923 const int64_t first_delta = first_sample_delta / samples_per_pixel;
924 e.delta = first_delta;
925 e.sample = edges.front().first;
927 // Check second edge if available
928 if (edges.size() == 2) {
929 // Note: -1 because this is usually the right edge and sample points are left-aligned
930 const int64_t second_sample_delta = abs(sample_num - edges.back().first - 1);
931 const int64_t second_delta = second_sample_delta / samples_per_pixel;
933 // If both edges are too close, we mark this signal as being dense
934 if ((first_delta + second_delta) <= snap_distance_)
937 if (second_delta < first_delta) {
938 e.delta = second_delta;
939 e.sample = edges.back().first;
944 // Look for the best match: non-dense first, then dense
945 entry_t *match = nullptr;
947 for (entry_t &e : list) {
948 if (e.delta > snap_distance_ || e.is_dense)
952 if (e.delta < match->delta)
959 for (entry_t &e : list) {
964 if (e.delta < match->delta)
972 // Somewhat ugly hack to make TimeItem::drag_by() work
973 signal_under_mouse_cursor_ = match->signal;
975 return match->sample;
981 void View::restack_all_trace_tree_items()
983 // Make a list of owners that is sorted from deepest first
984 const vector<shared_ptr<TraceTreeItem>> items(
985 list_by_type<TraceTreeItem>());
986 set< TraceTreeItemOwner* > owners;
987 for (const auto &r : items)
988 owners.insert(r->owner());
989 vector< TraceTreeItemOwner* > sorted_owners(owners.begin(), owners.end());
990 sort(sorted_owners.begin(), sorted_owners.end(),
991 [](const TraceTreeItemOwner* a, const TraceTreeItemOwner *b) {
992 return a->depth() > b->depth(); });
994 // Restack the items recursively
995 for (auto &o : sorted_owners)
998 // Animate the items to their destination
999 for (const auto &i : items)
1000 i->animate_to_layout_v_offset();
1003 int View::header_width() const
1005 return header_->extended_size_hint().width();
1008 void View::on_setting_changed(const QString &key, const QVariant &value)
1010 if (key == GlobalSettings::Key_View_TriggerIsZeroTime)
1011 on_settingViewTriggerIsZeroTime_changed(value);
1013 if (key == GlobalSettings::Key_View_SnapDistance) {
1014 GlobalSettings settings;
1015 snap_distance_ = settings.value(GlobalSettings::Key_View_SnapDistance).toInt();
1019 void View::trigger_event(int segment_id, util::Timestamp location)
1021 // TODO This doesn't work if we're showing multiple segments at once
1022 if ((uint32_t)segment_id != current_segment_)
1025 // Set zero location if the Key_View_TriggerIsZeroTime setting is set and
1026 // if this is the first trigger for this segment.
1027 GlobalSettings settings;
1028 bool trigger_is_zero_time = settings.value(GlobalSettings::Key_View_TriggerIsZeroTime).toBool();
1030 size_t trigger_count = session_.get_triggers(current_segment_).size();
1032 if (trigger_is_zero_time && trigger_count == 1)
1033 set_zero_position(location);
1035 trigger_markers_.push_back(make_shared<TriggerMarker>(*this, location));
1038 void View::get_scroll_layout(double &length, Timestamp &offset) const
1040 const pair<Timestamp, Timestamp> extents = get_time_extents();
1041 length = ((extents.second - extents.first) / scale_).convert_to<double>();
1042 offset = offset_ / scale_;
1045 void View::set_zoom(double scale, int offset)
1047 // Reset the "always zoom to fit" feature as the user changed the zoom
1048 always_zoom_to_fit_ = false;
1049 always_zoom_to_fit_changed(false);
1051 const Timestamp cursor_offset = offset_ + scale_ * offset;
1052 const Timestamp new_scale = max(min(Timestamp(scale), MaxScale), MinScale);
1053 const Timestamp new_offset = cursor_offset - new_scale * offset;
1054 set_scale_offset(new_scale.convert_to<double>(), new_offset);
1057 void View::calculate_tick_spacing()
1059 const double SpacingIncrement = 10.0f;
1060 const double MinValueSpacing = 40.0f;
1062 // Figure out the highest numeric value visible on a label
1063 const QSize areaSize = viewport_->size();
1064 const Timestamp max_time = max(fabs(offset_),
1065 fabs(offset_ + scale_ * areaSize.width()));
1067 double min_width = SpacingIncrement;
1068 double label_width, tick_period_width;
1070 QFontMetrics m(QApplication::font());
1072 // Copies of the member variables with the same name, used in the calculation
1073 // and written back afterwards, so that we don't emit signals all the time
1074 // during the calculation.
1075 pv::util::Timestamp tick_period = tick_period_;
1076 pv::util::SIPrefix tick_prefix = tick_prefix_;
1077 unsigned tick_precision = tick_precision_;
1080 const double min_period = scale_ * min_width;
1082 const int order = (int)floorf(log10f(min_period));
1083 const pv::util::Timestamp order_decimal =
1084 pow(pv::util::Timestamp(10), order);
1086 // Allow for a margin of error so that a scale unit of 1 can be used.
1087 // Otherwise, for a SU of 1 the tick period will almost always be below
1088 // the min_period by a small amount - and thus skipped in favor of 2.
1089 // Note: margin assumes that SU[0] and SU[1] contain the smallest values
1090 double tp_margin = (ScaleUnits[0] + ScaleUnits[1]) / 2.0;
1091 double tp_with_margin;
1092 unsigned int unit = 0;
1095 tp_with_margin = order_decimal.convert_to<double>() *
1096 (ScaleUnits[unit++] + tp_margin);
1097 } while (tp_with_margin < min_period && unit < countof(ScaleUnits));
1099 minor_tick_count_ = (unit == 2) ? 4 : 5;
1100 tick_period = order_decimal * ScaleUnits[unit - 1];
1101 tick_prefix = static_cast<pv::util::SIPrefix>(
1102 (order - pv::util::exponent(pv::util::SIPrefix::yocto)) / 3);
1104 // Precision is the number of fractional digits required, not
1105 // taking the prefix into account (and it must never be negative)
1106 tick_precision = max(ceil(log10(1 / tick_period)).convert_to<int>(), 0);
1108 tick_period_width = (tick_period / scale_).convert_to<double>();
1110 const QString label_text = Ruler::format_time_with_distance(
1111 tick_period, max_time, tick_prefix, time_unit_, tick_precision);
1113 label_width = m.boundingRect(0, 0, INT_MAX, INT_MAX,
1114 Qt::AlignLeft | Qt::AlignTop, label_text).width() +
1117 min_width += SpacingIncrement;
1118 } while (tick_period_width < label_width);
1120 set_tick_period(tick_period);
1121 set_tick_prefix(tick_prefix);
1122 set_tick_precision(tick_precision);
1125 void View::adjust_top_margin()
1129 const QSize areaSize = viewport_->size();
1131 const pair<int, int> extents = v_extents();
1132 const int top_margin = owner_visual_v_offset() + extents.first;
1133 const int trace_bottom = owner_visual_v_offset() + extents.first + extents.second;
1135 // Do we have empty space at the top while the last trace goes out of screen?
1136 if ((top_margin > 0) && (trace_bottom > areaSize.height())) {
1137 const int trace_height = extents.second - extents.first;
1139 // Center everything vertically if there is enough space
1140 if (areaSize.height() >= trace_height)
1141 set_v_offset(extents.first -
1142 ((areaSize.height() - trace_height) / 2));
1144 // Remove the top margin to make as many traces fit on screen as possible
1145 set_v_offset(extents.first);
1149 void View::update_scroll()
1152 QScrollBar *hscrollbar = scrollarea_->horizontalScrollBar();
1153 QScrollBar *vscrollbar = scrollarea_->verticalScrollBar();
1155 const QSize areaSize = viewport_->size();
1157 // Set the horizontal scroll bar
1160 get_scroll_layout(length, offset);
1161 length = max(length - areaSize.width(), 0.0);
1163 int major_tick_distance = (tick_period_ / scale_).convert_to<int>();
1165 hscrollbar->setPageStep(areaSize.width() / 2);
1166 hscrollbar->setSingleStep(major_tick_distance);
1168 updating_scroll_ = true;
1170 if (length < MaxScrollValue) {
1171 hscrollbar->setRange(0, length);
1172 hscrollbar->setSliderPosition(offset.convert_to<double>());
1174 hscrollbar->setRange(0, MaxScrollValue);
1175 hscrollbar->setSliderPosition(
1176 (offset_ * MaxScrollValue / (scale_ * length)).convert_to<double>());
1179 updating_scroll_ = false;
1181 // Set the vertical scrollbar
1182 vscrollbar->setPageStep(areaSize.height());
1183 vscrollbar->setSingleStep(areaSize.height() / 8);
1185 const pair<int, int> extents = v_extents();
1187 // Don't change the scrollbar range if there are no traces
1188 if (extents.first != extents.second)
1189 vscrollbar->setRange(extents.first - areaSize.height(),
1192 if (scroll_needs_defaults_) {
1193 set_scroll_default();
1194 scroll_needs_defaults_ = false;
1198 void View::reset_scroll()
1200 scrollarea_->verticalScrollBar()->setRange(0, 0);
1203 void View::set_scroll_default()
1207 const QSize areaSize = viewport_->size();
1209 const pair<int, int> extents = v_extents();
1210 const int trace_height = extents.second - extents.first;
1212 // Do all traces fit in the view?
1213 if (areaSize.height() >= trace_height)
1214 // Center all traces vertically
1215 set_v_offset(extents.first -
1216 ((areaSize.height() - trace_height) / 2));
1218 // Put the first trace at the top, letting the bottom ones overflow
1219 set_v_offset(extents.first);
1222 void View::determine_if_header_was_shrunk()
1224 const int header_pane_width =
1225 splitter_->sizes().front(); // clazy:exclude=detaching-temporary
1227 // Allow for a slight margin of error so that we also accept
1228 // slight differences when e.g. a label name change increased
1229 // the overall width
1230 header_was_shrunk_ = (header_pane_width < (header_width() - 10));
1233 void View::resize_header_to_fit()
1235 // Setting the maximum width of the header widget doesn't work as
1236 // expected because the splitter would allow the user to make the
1237 // pane wider than that, creating empty space as a result.
1238 // To make this work, we stricly enforce the maximum width by
1239 // expanding the header unless the user shrunk it on purpose.
1240 // As we're then setting the width of the header pane, we set the
1241 // splitter to the maximum allowed position.
1243 int splitter_area_width = 0;
1244 for (int w : splitter_->sizes()) // clazy:exclude=range-loop
1245 splitter_area_width += w;
1247 // Make sure the header has enough horizontal space to show all labels fully
1248 QList<int> pane_sizes;
1249 pane_sizes.push_back(header_->extended_size_hint().width());
1250 pane_sizes.push_back(splitter_area_width - header_->extended_size_hint().width());
1251 splitter_->setSizes(pane_sizes);
1254 void View::update_layout()
1259 TraceTreeItemOwner* View::find_prevalent_trace_group(
1260 const shared_ptr<sigrok::ChannelGroup> &group,
1261 const unordered_map<shared_ptr<data::SignalBase>, shared_ptr<Signal> >
1266 unordered_set<TraceTreeItemOwner*> owners;
1267 vector<TraceTreeItemOwner*> owner_list;
1269 // Make a set and a list of all the owners
1270 for (const auto& channel : group->channels()) {
1271 for (auto& entry : signal_map) {
1272 if (entry.first->channel() == channel) {
1273 TraceTreeItemOwner *const o = (entry.second)->owner();
1274 owner_list.push_back(o);
1280 // Iterate through the list of owners, and find the most prevalent
1281 size_t max_prevalence = 0;
1282 TraceTreeItemOwner *prevalent_owner = nullptr;
1283 for (TraceTreeItemOwner *owner : owners) {
1284 const size_t prevalence = count_if(
1285 owner_list.begin(), owner_list.end(),
1286 [&](TraceTreeItemOwner *o) { return o == owner; });
1287 if (prevalence > max_prevalence) {
1288 max_prevalence = prevalence;
1289 prevalent_owner = owner;
1293 return prevalent_owner;
1296 vector< shared_ptr<Trace> > View::extract_new_traces_for_channels(
1297 const vector< shared_ptr<sigrok::Channel> > &channels,
1298 const unordered_map<shared_ptr<data::SignalBase>, shared_ptr<Signal> >
1300 set< shared_ptr<Trace> > &add_list)
1302 vector< shared_ptr<Trace> > filtered_traces;
1304 for (const auto& channel : channels) {
1305 for (auto& entry : signal_map) {
1306 if (entry.first->channel() == channel) {
1307 shared_ptr<Trace> trace = entry.second;
1308 const auto list_iter = add_list.find(trace);
1309 if (list_iter == add_list.end())
1312 filtered_traces.push_back(trace);
1313 add_list.erase(list_iter);
1318 return filtered_traces;
1321 void View::determine_time_unit()
1323 // Check whether we know the sample rate and hence can use time as the unit
1324 if (time_unit_ == util::TimeUnit::Samples) {
1325 // Check all signals but...
1326 for (const shared_ptr<Signal>& signal : signals_) {
1327 const shared_ptr<SignalData> data = signal->data();
1329 // ...only check first segment of each
1330 const vector< shared_ptr<Segment> > segments = data->segments();
1331 if (!segments.empty())
1332 if (segments[0]->samplerate()) {
1333 set_time_unit(util::TimeUnit::Time);
1340 bool View::eventFilter(QObject *object, QEvent *event)
1342 const QEvent::Type type = event->type();
1343 if (type == QEvent::MouseMove) {
1346 hover_widget_ = qobject_cast<QWidget*>(object);
1348 const QMouseEvent *const mouse_event = (QMouseEvent*)event;
1349 if (object == viewport_)
1350 hover_point_ = mouse_event->pos();
1351 else if (object == ruler_)
1352 hover_point_ = mouse_event->pos();
1353 else if (object == header_)
1354 hover_point_ = QPoint(0, mouse_event->y());
1356 hover_point_ = QPoint(-1, -1);
1358 update_hover_point();
1360 } else if (type == QEvent::Leave) {
1361 hover_point_ = QPoint(-1, -1);
1362 update_hover_point();
1363 } else if (type == QEvent::Show) {
1365 // This is somewhat of a hack, unfortunately. We cannot use
1366 // set_v_offset() from within restore_settings() as the view
1367 // at that point is neither visible nor properly sized.
1368 // This is the least intrusive workaround I could come up
1369 // with: set the vertical offset (or scroll defaults) when
1370 // the view is shown, which happens after all widgets were
1371 // resized to their final sizes.
1374 if (settings_restored_)
1375 determine_if_header_was_shrunk();
1377 resize_header_to_fit();
1379 if (scroll_needs_defaults_) {
1380 set_scroll_default();
1381 scroll_needs_defaults_ = false;
1384 if (saved_v_offset_) {
1385 set_v_offset(saved_v_offset_);
1386 saved_v_offset_ = 0;
1390 return QObject::eventFilter(object, event);
1393 void View::contextMenuEvent(QContextMenuEvent *event)
1395 QPoint pos = event->pos() - QPoint(0, ruler_->sizeHint().height());
1397 const shared_ptr<ViewItem> r = viewport_->get_mouse_over_item(pos);
1401 QMenu *menu = r->create_view_context_menu(this, pos);
1403 menu->popup(event->globalPos());
1406 void View::resizeEvent(QResizeEvent* event)
1408 // Only adjust the top margin if we shrunk vertically
1409 if (event->size().height() < event->oldSize().height())
1410 adjust_top_margin();
1415 void View::update_hover_point()
1417 // Determine signal that the mouse cursor is hovering over
1418 signal_under_mouse_cursor_.reset();
1419 if (hover_widget_ == this) {
1420 for (const shared_ptr<Signal>& s : signals_) {
1421 const pair<int, int> extents = s->v_extents();
1422 const int top = s->get_visual_y() + extents.first;
1423 const int btm = s->get_visual_y() + extents.second;
1424 if ((hover_point_.y() >= top) && (hover_point_.y() <= btm)
1425 && s->base()->enabled())
1426 signal_under_mouse_cursor_ = s;
1430 // Update all trace tree items
1431 const vector<shared_ptr<TraceTreeItem>> trace_tree_items(
1432 list_by_type<TraceTreeItem>());
1433 for (const shared_ptr<TraceTreeItem>& r : trace_tree_items)
1434 r->hover_point_changed(hover_point_);
1436 // Notify any other listeners
1437 hover_point_changed(hover_widget_, hover_point_);
1440 void View::row_item_appearance_changed(bool label, bool content)
1445 viewport_->update();
1448 void View::time_item_appearance_changed(bool label, bool content)
1453 // Make sure the header pane width is updated, too
1458 viewport_->update();
1461 void View::extents_changed(bool horz, bool vert)
1464 (horz ? TraceTreeItemHExtentsChanged : 0) |
1465 (vert ? TraceTreeItemVExtentsChanged : 0);
1467 lazy_event_handler_.stop();
1468 lazy_event_handler_.start();
1471 void View::on_signal_name_changed()
1473 if (!header_was_shrunk_)
1474 resize_header_to_fit();
1477 void View::on_splitter_moved()
1479 // The header can only shrink when the splitter is moved manually
1480 determine_if_header_was_shrunk();
1482 if (!header_was_shrunk_)
1483 resize_header_to_fit();
1486 void View::h_scroll_value_changed(int value)
1488 if (updating_scroll_)
1491 // Disable sticky scrolling when user moves the horizontal scroll bar
1492 // during a running acquisition
1493 if (sticky_scrolling_ && (session_.get_capture_state() == Session::Running)) {
1494 sticky_scrolling_ = false;
1495 sticky_scrolling_changed(false);
1498 const int range = scrollarea_->horizontalScrollBar()->maximum();
1499 if (range < MaxScrollValue)
1500 set_offset(scale_ * value);
1504 get_scroll_layout(length, offset);
1505 set_offset(scale_ * length * value / MaxScrollValue);
1509 viewport_->update();
1512 void View::v_scroll_value_changed()
1515 viewport_->update();
1518 void View::signals_changed()
1520 using sigrok::Channel;
1522 vector< shared_ptr<Channel> > channels;
1523 shared_ptr<sigrok::Device> sr_dev;
1524 bool signals_added_or_removed = false;
1526 // Do we need to set the vertical scrollbar to its default position later?
1527 // We do if there are no traces, i.e. the scroll bar has no range set
1528 bool reset_scrollbar =
1529 (scrollarea_->verticalScrollBar()->minimum() ==
1530 scrollarea_->verticalScrollBar()->maximum());
1532 if (!session_.device()) {
1536 sr_dev = session_.device()->device();
1538 channels = sr_dev->channels();
1541 vector< shared_ptr<TraceTreeItem> > new_top_level_items;
1543 // Make a list of traces that are being added, and a list of traces
1544 // that are being removed
1545 const vector<shared_ptr<Trace>> prev_trace_list = list_by_type<Trace>();
1546 const set<shared_ptr<Trace>> prev_traces(
1547 prev_trace_list.begin(), prev_trace_list.end());
1549 set< shared_ptr<Trace> > traces(signals_.begin(), signals_.end());
1551 #ifdef ENABLE_DECODE
1552 traces.insert(decode_traces_.begin(), decode_traces_.end());
1555 set< shared_ptr<Trace> > add_traces;
1556 set_difference(traces.begin(), traces.end(),
1557 prev_traces.begin(), prev_traces.end(),
1558 inserter(add_traces, add_traces.begin()));
1560 set< shared_ptr<Trace> > remove_traces;
1561 set_difference(prev_traces.begin(), prev_traces.end(),
1562 traces.begin(), traces.end(),
1563 inserter(remove_traces, remove_traces.begin()));
1565 // Make a look-up table of sigrok Channels to pulseview Signals
1566 unordered_map<shared_ptr<data::SignalBase>, shared_ptr<Signal> >
1568 for (const shared_ptr<Signal>& sig : signals_)
1569 signal_map[sig->base()] = sig;
1571 // Populate channel groups
1573 for (auto& entry : sr_dev->channel_groups()) {
1574 const shared_ptr<sigrok::ChannelGroup> &group = entry.second;
1576 if (group->channels().size() <= 1)
1579 // Find best trace group to add to
1580 TraceTreeItemOwner *owner = find_prevalent_trace_group(
1583 // If there is no trace group, create one
1584 shared_ptr<TraceGroup> new_trace_group;
1586 new_trace_group.reset(new TraceGroup());
1587 owner = new_trace_group.get();
1590 // Extract traces for the trace group, removing them from
1592 const vector< shared_ptr<Trace> > new_traces_in_group =
1593 extract_new_traces_for_channels(group->channels(),
1594 signal_map, add_traces);
1596 // Add the traces to the group
1597 const pair<int, int> prev_v_extents = owner->v_extents();
1598 int offset = prev_v_extents.second - prev_v_extents.first;
1599 for (const shared_ptr<Trace>& trace : new_traces_in_group) {
1601 owner->add_child_item(trace);
1603 const pair<int, int> extents = trace->v_extents();
1604 if (trace->enabled())
1605 offset += -extents.first;
1606 trace->force_to_v_offset(offset);
1607 if (trace->enabled())
1608 offset += extents.second;
1611 if (new_trace_group) {
1612 // Assign proper vertical offsets to each channel in the group
1613 new_trace_group->restack_items();
1615 // If this is a new group, enqueue it in the new top level
1617 if (!new_traces_in_group.empty())
1618 new_top_level_items.push_back(new_trace_group);
1622 // Enqueue the remaining logic channels in a group
1623 vector< shared_ptr<Channel> > logic_channels;
1624 copy_if(channels.begin(), channels.end(), back_inserter(logic_channels),
1625 [](const shared_ptr<Channel>& c) {
1626 return c->type() == sigrok::ChannelType::LOGIC; });
1628 const vector< shared_ptr<Trace> > non_grouped_logic_signals =
1629 extract_new_traces_for_channels(logic_channels, signal_map, add_traces);
1631 if (non_grouped_logic_signals.size() > 0) {
1632 const shared_ptr<TraceGroup> non_grouped_trace_group(
1633 make_shared<TraceGroup>());
1634 for (const shared_ptr<Trace>& trace : non_grouped_logic_signals)
1635 non_grouped_trace_group->add_child_item(trace);
1637 non_grouped_trace_group->restack_items();
1638 new_top_level_items.push_back(non_grouped_trace_group);
1641 // Enqueue the remaining channels as free ungrouped traces
1642 const vector< shared_ptr<Trace> > new_top_level_signals =
1643 extract_new_traces_for_channels(channels, signal_map, add_traces);
1644 new_top_level_items.insert(new_top_level_items.end(),
1645 new_top_level_signals.begin(), new_top_level_signals.end());
1647 // Enqueue any remaining traces i.e. decode traces
1648 new_top_level_items.insert(new_top_level_items.end(),
1649 add_traces.begin(), add_traces.end());
1651 // Remove any removed traces
1652 for (const shared_ptr<Trace>& trace : remove_traces) {
1653 TraceTreeItemOwner *const owner = trace->owner();
1655 owner->remove_child_item(trace);
1656 signals_added_or_removed = true;
1659 // Remove any empty trace groups
1660 for (shared_ptr<TraceGroup> group : list_by_type<TraceGroup>())
1661 if (group->child_items().size() == 0) {
1662 remove_child_item(group);
1666 // Add and position the pending top levels items
1667 int offset = v_extents().second;
1668 for (auto item : new_top_level_items) {
1669 add_child_item(item);
1671 // Position the item after the last item or at the top if there is none
1672 const pair<int, int> extents = item->v_extents();
1674 if (item->enabled())
1675 offset += -extents.first;
1677 item->force_to_v_offset(offset);
1679 if (item->enabled())
1680 offset += extents.second;
1681 signals_added_or_removed = true;
1685 if (signals_added_or_removed && !header_was_shrunk_)
1686 resize_header_to_fit();
1691 viewport_->update();
1693 if (reset_scrollbar)
1694 set_scroll_default();
1697 void View::capture_state_updated(int state)
1699 GlobalSettings settings;
1701 if (state == Session::Running) {
1702 set_time_unit(util::TimeUnit::Samples);
1704 trigger_markers_.clear();
1705 set_zero_position(0);
1707 scale_at_acq_start_ = scale_;
1708 offset_at_acq_start_ = offset_;
1710 // Activate "always zoom to fit" if the setting is enabled and we're
1711 // the main view of this session (other trace views may be used for
1712 // zooming and we don't want to mess them up)
1713 bool state = settings.value(GlobalSettings::Key_View_ZoomToFitDuringAcq).toBool();
1714 if (is_main_view_ && state) {
1715 always_zoom_to_fit_ = true;
1716 always_zoom_to_fit_changed(always_zoom_to_fit_);
1719 // Enable sticky scrolling if the setting is enabled
1720 sticky_scrolling_ = settings.value(GlobalSettings::Key_View_StickyScrolling).toBool();
1722 // Reset all traces to segment 0
1723 current_segment_ = 0;
1724 set_current_segment(current_segment_);
1727 if (state == Session::Stopped) {
1728 // After acquisition has stopped we need to re-calculate the ticks once
1729 // as it's otherwise done when the user pans or zooms, which is too late
1730 calculate_tick_spacing();
1732 // Reset "always zoom to fit", the acquisition has stopped
1733 if (always_zoom_to_fit_) {
1734 // Perform a final zoom-to-fit before disabling
1735 zoom_fit(always_zoom_to_fit_);
1736 always_zoom_to_fit_ = false;
1737 always_zoom_to_fit_changed(always_zoom_to_fit_);
1740 bool zoom_to_fit_after_acq =
1741 settings.value(GlobalSettings::Key_View_ZoomToFitAfterAcq).toBool();
1743 // Only perform zoom-to-fit if the user hasn't altered the viewport and
1744 // we didn't restore settings in the meanwhile
1745 if (zoom_to_fit_after_acq &&
1746 !suppress_zoom_to_fit_after_acq_ &&
1747 (scale_ == scale_at_acq_start_) &&
1748 (offset_ == offset_at_acq_start_))
1749 zoom_fit(false); // We're stopped, so the GUI state doesn't matter
1751 suppress_zoom_to_fit_after_acq_ = false;
1755 void View::on_new_segment(int new_segment_id)
1757 on_segment_changed(new_segment_id);
1760 void View::on_segment_completed(int segment_id)
1762 on_segment_changed(segment_id);
1765 void View::on_segment_changed(int segment)
1767 switch (segment_display_mode_) {
1768 case Trace::ShowLastSegmentOnly:
1769 case Trace::ShowSingleSegmentOnly:
1770 set_current_segment(segment);
1773 case Trace::ShowLastCompleteSegmentOnly:
1774 // Only update if all segments are complete
1775 if (session_.all_segments_complete(segment))
1776 set_current_segment(segment);
1779 case Trace::ShowAllSegments:
1780 case Trace::ShowAccumulatedIntensity:
1786 void View::on_settingViewTriggerIsZeroTime_changed(const QVariant new_value)
1788 if (new_value.toBool()) {
1789 // The first trigger for this segment is used as the zero position
1790 vector<util::Timestamp> triggers = session_.get_triggers(current_segment_);
1791 if (triggers.size() > 0)
1792 set_zero_position(triggers.front());
1794 reset_zero_position();
1797 void View::perform_delayed_view_update()
1799 if (always_zoom_to_fit_) {
1801 } else if (sticky_scrolling_) {
1802 // Make right side of the view sticky
1805 get_scroll_layout(length, offset);
1807 const QSize areaSize = viewport_->size();
1808 length = max(length - areaSize.width(), 0.0);
1810 set_offset(scale_ * length);
1813 determine_time_unit();
1816 viewport_->update();
1819 void View::process_sticky_events()
1821 if (sticky_events_ & TraceTreeItemHExtentsChanged)
1823 if (sticky_events_ & TraceTreeItemVExtentsChanged) {
1824 restack_all_trace_tree_items();
1828 // Clear the sticky events
1832 } // namespace trace
1833 } // namespace views