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("ruler_shift", ruler_shift_);
369 settings.setValue("ruler_shift", QString::fromStdString(ss.str()));
373 boost::archive::text_oarchive oa(ss);
374 oa << boost::serialization::make_nvp("offset", offset_);
375 settings.setValue("offset", QString::fromStdString(ss.str()));
378 for (const shared_ptr<Signal>& signal : signals_) {
379 settings.beginGroup(signal->base()->internal_name());
380 signal->save_settings(settings);
385 void View::restore_settings(QSettings &settings)
387 // Note: It is assumed that this function is only called once,
388 // immediately after restoring a previous session.
390 if (settings.contains("scale"))
391 set_scale(settings.value("scale").toDouble());
393 if (settings.contains("ruler_shift")) {
394 util::Timestamp shift;
396 ss << settings.value("ruler_shift").toString().toStdString();
399 boost::archive::text_iarchive ia(ss);
400 ia >> boost::serialization::make_nvp("ruler_shift", shift);
401 ruler_shift_ = shift;
402 } catch (boost::archive::archive_exception&) {
403 qDebug() << "Could not restore the view ruler shift";
407 if (settings.contains("offset")) {
408 util::Timestamp offset;
410 ss << settings.value("offset").toString().toStdString();
413 boost::archive::text_iarchive ia(ss);
414 ia >> boost::serialization::make_nvp("offset", offset);
415 // This also updates ruler_offset_
417 } catch (boost::archive::archive_exception&) {
418 qDebug() << "Could not restore the view offset";
422 if (settings.contains("splitter_state"))
423 splitter_->restoreState(settings.value("splitter_state").toByteArray());
425 if (settings.contains("segment_display_mode"))
426 set_segment_display_mode(
427 (Trace::SegmentDisplayMode)(settings.value("segment_display_mode").toInt()));
429 for (shared_ptr<Signal> signal : signals_) {
430 settings.beginGroup(signal->base()->internal_name());
431 signal->restore_settings(settings);
435 if (settings.contains("v_offset")) {
436 saved_v_offset_ = settings.value("v_offset").toInt();
437 set_v_offset(saved_v_offset_);
438 scroll_needs_defaults_ = false;
439 // Note: see eventFilter() for additional information
442 settings_restored_ = true;
443 suppress_zoom_to_fit_after_acq_ = true;
445 // Update the ruler so that it uses the new scale
446 calculate_tick_spacing();
449 vector< shared_ptr<TimeItem> > View::time_items() const
451 const vector<shared_ptr<Flag>> f(flags());
452 vector<shared_ptr<TimeItem>> items(f.begin(), f.end());
455 items.push_back(cursors_);
456 items.push_back(cursors_->first());
457 items.push_back(cursors_->second());
460 for (auto& trigger_marker : trigger_markers_)
461 items.push_back(trigger_marker);
466 double View::scale() const
471 void View::set_scale(double scale)
473 if (scale_ != scale) {
479 void View::set_offset(const pv::util::Timestamp& offset, bool force_update)
481 if ((offset_ != offset) || force_update) {
483 ruler_offset_ = offset_ + ruler_shift_;
488 const Timestamp& View::offset() const
493 const Timestamp& View::ruler_offset() const
495 return ruler_offset_;
498 void View::set_zero_position(pv::util::Timestamp& position)
500 ruler_shift_ = -position;
502 // Force an immediate update of the offsets
503 set_offset(offset_, true);
507 void View::reset_zero_position()
511 // Force an immediate update of the offsets
512 set_offset(offset_, true);
516 int View::owner_visual_v_offset() const
518 return -scrollarea_->verticalScrollBar()->sliderPosition();
521 void View::set_v_offset(int offset)
523 scrollarea_->verticalScrollBar()->setSliderPosition(offset);
528 unsigned int View::depth() const
533 uint32_t View::current_segment() const
535 return current_segment_;
538 pv::util::SIPrefix View::tick_prefix() const
543 void View::set_tick_prefix(pv::util::SIPrefix tick_prefix)
545 if (tick_prefix_ != tick_prefix) {
546 tick_prefix_ = tick_prefix;
547 tick_prefix_changed();
551 unsigned int View::tick_precision() const
553 return tick_precision_;
556 void View::set_tick_precision(unsigned tick_precision)
558 if (tick_precision_ != tick_precision) {
559 tick_precision_ = tick_precision;
560 tick_precision_changed();
564 const pv::util::Timestamp& View::tick_period() const
569 unsigned int View::minor_tick_count() const
571 return minor_tick_count_;
574 void View::set_tick_period(const pv::util::Timestamp& tick_period)
576 if (tick_period_ != tick_period) {
577 tick_period_ = tick_period;
578 tick_period_changed();
582 TimeUnit View::time_unit() const
587 void View::set_time_unit(pv::util::TimeUnit time_unit)
589 if (time_unit_ != time_unit) {
590 time_unit_ = time_unit;
595 void View::set_current_segment(uint32_t segment_id)
597 current_segment_ = segment_id;
599 for (const shared_ptr<Signal>& signal : signals_)
600 signal->set_current_segment(current_segment_);
602 for (shared_ptr<DecodeTrace>& dt : decode_traces_)
603 dt->set_current_segment(current_segment_);
606 vector<util::Timestamp> triggers = session_.get_triggers(current_segment_);
608 trigger_markers_.clear();
609 for (util::Timestamp timestamp : triggers)
610 trigger_markers_.push_back(make_shared<TriggerMarker>(*this, timestamp));
612 // When enabled, the first trigger for this segment is used as the zero position
613 GlobalSettings settings;
614 bool trigger_is_zero_time = settings.value(GlobalSettings::Key_View_TriggerIsZeroTime).toBool();
616 if (trigger_is_zero_time && (triggers.size() > 0))
617 set_zero_position(triggers.front());
621 segment_changed(segment_id);
624 bool View::segment_is_selectable() const
626 return segment_selectable_;
629 Trace::SegmentDisplayMode View::segment_display_mode() const
631 return segment_display_mode_;
634 void View::set_segment_display_mode(Trace::SegmentDisplayMode mode)
636 segment_display_mode_ = mode;
638 for (const shared_ptr<Signal>& signal : signals_)
639 signal->set_segment_display_mode(mode);
641 uint32_t last_segment = session_.get_segment_count() - 1;
644 case Trace::ShowLastSegmentOnly:
645 if (current_segment_ != last_segment)
646 set_current_segment(last_segment);
649 case Trace::ShowLastCompleteSegmentOnly:
650 // Do nothing if we only have one segment so far
651 if (last_segment > 0) {
652 // If the last segment isn't complete, the previous one must be
653 uint32_t segment_id =
654 (session_.all_segments_complete(last_segment)) ?
655 last_segment : last_segment - 1;
657 if (current_segment_ != segment_id)
658 set_current_segment(segment_id);
662 case Trace::ShowSingleSegmentOnly:
663 case Trace::ShowAllSegments:
664 case Trace::ShowAccumulatedIntensity:
666 // Current segment remains as-is
670 segment_selectable_ = true;
672 if ((mode == Trace::ShowAllSegments) || (mode == Trace::ShowAccumulatedIntensity))
673 segment_selectable_ = false;
677 segment_display_mode_changed((int)mode, segment_selectable_);
680 void View::zoom(double steps)
682 zoom(steps, viewport_->width() / 2);
685 void View::zoom(double steps, int offset)
687 set_zoom(scale_ * pow(3.0 / 2.0, -steps), offset);
690 void View::zoom_fit(bool gui_state)
692 // Act as one-shot when stopped, toggle along with the GUI otherwise
693 if (session_.get_capture_state() == Session::Stopped) {
694 always_zoom_to_fit_ = false;
695 always_zoom_to_fit_changed(false);
697 always_zoom_to_fit_ = gui_state;
698 always_zoom_to_fit_changed(gui_state);
701 const pair<Timestamp, Timestamp> extents = get_time_extents();
702 const Timestamp delta = extents.second - extents.first;
703 if (delta < Timestamp("1e-12"))
707 const int w = viewport_->width();
711 const Timestamp scale = max(min(delta / w, MaxScale), MinScale);
712 set_scale_offset(scale.convert_to<double>(), extents.first);
715 void View::set_scale_offset(double scale, const Timestamp& offset)
717 // Disable sticky scrolling / always zoom to fit when acquisition runs
718 // and user drags the viewport
719 if ((scale_ == scale) && (offset_ != offset) &&
720 (session_.get_capture_state() == Session::Running)) {
722 if (sticky_scrolling_) {
723 sticky_scrolling_ = false;
724 sticky_scrolling_changed(false);
727 if (always_zoom_to_fit_) {
728 always_zoom_to_fit_ = false;
729 always_zoom_to_fit_changed(false);
736 calculate_tick_spacing();
743 set< shared_ptr<SignalData> > View::get_visible_data() const
745 // Make a set of all the visible data objects
746 set< shared_ptr<SignalData> > visible_data;
747 for (const shared_ptr<Signal>& sig : signals_)
749 visible_data.insert(sig->data());
754 pair<Timestamp, Timestamp> View::get_time_extents() const
756 boost::optional<Timestamp> left_time, right_time;
757 const set< shared_ptr<SignalData> > visible_data = get_visible_data();
758 for (const shared_ptr<SignalData>& d : visible_data) {
759 const vector< shared_ptr<Segment> > segments = d->segments();
760 for (const shared_ptr<Segment>& s : segments) {
761 double samplerate = s->samplerate();
762 samplerate = (samplerate <= 0.0) ? 1.0 : samplerate;
764 const Timestamp start_time = s->start_time();
765 left_time = left_time ?
766 min(*left_time, start_time) :
768 right_time = right_time ?
769 max(*right_time, start_time + d->max_sample_count() / samplerate) :
770 start_time + d->max_sample_count() / samplerate;
774 if (!left_time || !right_time)
775 return make_pair(0, 0);
777 assert(*left_time < *right_time);
778 return make_pair(*left_time, *right_time);
781 void View::enable_show_sampling_points(bool state)
788 void View::enable_show_analog_minor_grid(bool state)
795 void View::enable_colored_bg(bool state)
801 bool View::colored_bg() const
806 bool View::cursors_shown() const
808 return show_cursors_;
811 void View::show_cursors(bool show)
813 show_cursors_ = show;
814 cursor_state_changed(show);
819 void View::centre_cursors()
822 const double time_width = scale_ * viewport_->width();
823 cursors_->first()->set_time(offset_ + time_width * 0.4);
824 cursors_->second()->set_time(offset_ + time_width * 0.6);
831 shared_ptr<CursorPair> View::cursors() const
836 void View::add_flag(const Timestamp& time)
838 flags_.push_back(make_shared<Flag>(*this, time,
839 QString("%1").arg(next_flag_text_)));
841 next_flag_text_ = (next_flag_text_ >= 'Z') ? 'A' :
842 (next_flag_text_ + 1);
844 time_item_appearance_changed(true, true);
847 void View::remove_flag(shared_ptr<Flag> flag)
850 time_item_appearance_changed(true, true);
853 vector< shared_ptr<Flag> > View::flags() const
855 vector< shared_ptr<Flag> > flags(flags_.begin(), flags_.end());
856 stable_sort(flags.begin(), flags.end(),
857 [](const shared_ptr<Flag> &a, const shared_ptr<Flag> &b) {
858 return a->time() < b->time();
864 const QPoint& View::hover_point() const
869 const QWidget* View::hover_widget() const
871 return hover_widget_;
874 int64_t View::get_nearest_level_change(const QPoint &p)
876 // Is snapping disabled?
877 if (snap_distance_ == 0)
881 entry_t(shared_ptr<Signal> s) :
882 signal(s), delta(numeric_limits<int64_t>::max()), sample(-1), is_dense(false) {}
883 shared_ptr<Signal> signal;
889 vector<entry_t> list;
891 // Create list of signals to consider
892 if (signal_under_mouse_cursor_)
893 list.emplace_back(signal_under_mouse_cursor_);
895 for (shared_ptr<Signal> s : signals_) {
899 list.emplace_back(s);
902 // Get data for listed signals
903 for (entry_t &e : list) {
904 // Calculate sample number from cursor position
905 const double samples_per_pixel = e.signal->base()->get_samplerate() * scale();
906 const int64_t x_offset = offset().convert_to<double>() / scale();
907 const int64_t sample_num = max(((x_offset + p.x()) * samples_per_pixel), 0.0);
909 vector<data::LogicSegment::EdgePair> edges =
910 e.signal->get_nearest_level_changes(sample_num);
916 const int64_t first_sample_delta = abs(sample_num - edges.front().first);
917 const int64_t first_delta = first_sample_delta / samples_per_pixel;
918 e.delta = first_delta;
919 e.sample = edges.front().first;
921 // Check second edge if available
922 if (edges.size() == 2) {
923 // Note: -1 because this is usually the right edge and sample points are left-aligned
924 const int64_t second_sample_delta = abs(sample_num - edges.back().first - 1);
925 const int64_t second_delta = second_sample_delta / samples_per_pixel;
927 // If both edges are too close, we mark this signal as being dense
928 if ((first_delta + second_delta) <= snap_distance_)
931 if (second_delta < first_delta) {
932 e.delta = second_delta;
933 e.sample = edges.back().first;
938 // Look for the best match: non-dense first, then dense
939 entry_t *match = nullptr;
941 for (entry_t &e : list) {
942 if (e.delta > snap_distance_ || e.is_dense)
946 if (e.delta < match->delta)
953 for (entry_t &e : list) {
958 if (e.delta < match->delta)
966 // Somewhat ugly hack to make TimeItem::drag_by() work
967 signal_under_mouse_cursor_ = match->signal;
969 return match->sample;
975 void View::restack_all_trace_tree_items()
977 // Make a list of owners that is sorted from deepest first
978 const vector<shared_ptr<TraceTreeItem>> items(
979 list_by_type<TraceTreeItem>());
980 set< TraceTreeItemOwner* > owners;
981 for (const auto &r : items)
982 owners.insert(r->owner());
983 vector< TraceTreeItemOwner* > sorted_owners(owners.begin(), owners.end());
984 sort(sorted_owners.begin(), sorted_owners.end(),
985 [](const TraceTreeItemOwner* a, const TraceTreeItemOwner *b) {
986 return a->depth() > b->depth(); });
988 // Restack the items recursively
989 for (auto &o : sorted_owners)
992 // Animate the items to their destination
993 for (const auto &i : items)
994 i->animate_to_layout_v_offset();
997 int View::header_width() const
999 return header_->extended_size_hint().width();
1002 void View::on_setting_changed(const QString &key, const QVariant &value)
1004 if (key == GlobalSettings::Key_View_TriggerIsZeroTime)
1005 on_settingViewTriggerIsZeroTime_changed(value);
1007 if (key == GlobalSettings::Key_View_SnapDistance) {
1008 GlobalSettings settings;
1009 snap_distance_ = settings.value(GlobalSettings::Key_View_SnapDistance).toInt();
1013 void View::trigger_event(int segment_id, util::Timestamp location)
1015 // TODO This doesn't work if we're showing multiple segments at once
1016 if ((uint32_t)segment_id != current_segment_)
1019 // Set zero location if the Key_View_TriggerIsZeroTime setting is set and
1020 // if this is the first trigger for this segment.
1021 GlobalSettings settings;
1022 bool trigger_is_zero_time = settings.value(GlobalSettings::Key_View_TriggerIsZeroTime).toBool();
1024 size_t trigger_count = session_.get_triggers(current_segment_).size();
1026 if (trigger_is_zero_time && trigger_count == 1)
1027 set_zero_position(location);
1029 trigger_markers_.push_back(make_shared<TriggerMarker>(*this, location));
1032 void View::get_scroll_layout(double &length, Timestamp &offset) const
1034 const pair<Timestamp, Timestamp> extents = get_time_extents();
1035 length = ((extents.second - extents.first) / scale_).convert_to<double>();
1036 offset = offset_ / scale_;
1039 void View::set_zoom(double scale, int offset)
1041 // Reset the "always zoom to fit" feature as the user changed the zoom
1042 always_zoom_to_fit_ = false;
1043 always_zoom_to_fit_changed(false);
1045 const Timestamp cursor_offset = offset_ + scale_ * offset;
1046 const Timestamp new_scale = max(min(Timestamp(scale), MaxScale), MinScale);
1047 const Timestamp new_offset = cursor_offset - new_scale * offset;
1048 set_scale_offset(new_scale.convert_to<double>(), new_offset);
1051 void View::calculate_tick_spacing()
1053 const double SpacingIncrement = 10.0f;
1054 const double MinValueSpacing = 40.0f;
1056 // Figure out the highest numeric value visible on a label
1057 const QSize areaSize = viewport_->size();
1058 const Timestamp max_time = max(fabs(offset_),
1059 fabs(offset_ + scale_ * areaSize.width()));
1061 double min_width = SpacingIncrement;
1062 double label_width, tick_period_width;
1064 QFontMetrics m(QApplication::font());
1066 // Copies of the member variables with the same name, used in the calculation
1067 // and written back afterwards, so that we don't emit signals all the time
1068 // during the calculation.
1069 pv::util::Timestamp tick_period = tick_period_;
1070 pv::util::SIPrefix tick_prefix = tick_prefix_;
1071 unsigned tick_precision = tick_precision_;
1074 const double min_period = scale_ * min_width;
1076 const int order = (int)floorf(log10f(min_period));
1077 const pv::util::Timestamp order_decimal =
1078 pow(pv::util::Timestamp(10), order);
1080 // Allow for a margin of error so that a scale unit of 1 can be used.
1081 // Otherwise, for a SU of 1 the tick period will almost always be below
1082 // the min_period by a small amount - and thus skipped in favor of 2.
1083 // Note: margin assumes that SU[0] and SU[1] contain the smallest values
1084 double tp_margin = (ScaleUnits[0] + ScaleUnits[1]) / 2.0;
1085 double tp_with_margin;
1086 unsigned int unit = 0;
1089 tp_with_margin = order_decimal.convert_to<double>() *
1090 (ScaleUnits[unit++] + tp_margin);
1091 } while (tp_with_margin < min_period && unit < countof(ScaleUnits));
1093 minor_tick_count_ = (unit == 2) ? 4 : 5;
1094 tick_period = order_decimal * ScaleUnits[unit - 1];
1095 tick_prefix = static_cast<pv::util::SIPrefix>(
1096 (order - pv::util::exponent(pv::util::SIPrefix::yocto)) / 3);
1098 // Precision is the number of fractional digits required, not
1099 // taking the prefix into account (and it must never be negative)
1100 tick_precision = max(ceil(log10(1 / tick_period)).convert_to<int>(), 0);
1102 tick_period_width = (tick_period / scale_).convert_to<double>();
1104 const QString label_text = Ruler::format_time_with_distance(
1105 tick_period, max_time, tick_prefix, time_unit_, tick_precision);
1107 label_width = m.boundingRect(0, 0, INT_MAX, INT_MAX,
1108 Qt::AlignLeft | Qt::AlignTop, label_text).width() +
1111 min_width += SpacingIncrement;
1112 } while (tick_period_width < label_width);
1114 set_tick_period(tick_period);
1115 set_tick_prefix(tick_prefix);
1116 set_tick_precision(tick_precision);
1119 void View::adjust_top_margin()
1123 const QSize areaSize = viewport_->size();
1125 const pair<int, int> extents = v_extents();
1126 const int top_margin = owner_visual_v_offset() + extents.first;
1127 const int trace_bottom = owner_visual_v_offset() + extents.first + extents.second;
1129 // Do we have empty space at the top while the last trace goes out of screen?
1130 if ((top_margin > 0) && (trace_bottom > areaSize.height())) {
1131 const int trace_height = extents.second - extents.first;
1133 // Center everything vertically if there is enough space
1134 if (areaSize.height() >= trace_height)
1135 set_v_offset(extents.first -
1136 ((areaSize.height() - trace_height) / 2));
1138 // Remove the top margin to make as many traces fit on screen as possible
1139 set_v_offset(extents.first);
1143 void View::update_scroll()
1146 QScrollBar *hscrollbar = scrollarea_->horizontalScrollBar();
1147 QScrollBar *vscrollbar = scrollarea_->verticalScrollBar();
1149 const QSize areaSize = viewport_->size();
1151 // Set the horizontal scroll bar
1154 get_scroll_layout(length, offset);
1155 length = max(length - areaSize.width(), 0.0);
1157 int major_tick_distance = (tick_period_ / scale_).convert_to<int>();
1159 hscrollbar->setPageStep(areaSize.width() / 2);
1160 hscrollbar->setSingleStep(major_tick_distance);
1162 updating_scroll_ = true;
1164 if (length < MaxScrollValue) {
1165 hscrollbar->setRange(0, length);
1166 hscrollbar->setSliderPosition(offset.convert_to<double>());
1168 hscrollbar->setRange(0, MaxScrollValue);
1169 hscrollbar->setSliderPosition(
1170 (offset_ * MaxScrollValue / (scale_ * length)).convert_to<double>());
1173 updating_scroll_ = false;
1175 // Set the vertical scrollbar
1176 vscrollbar->setPageStep(areaSize.height());
1177 vscrollbar->setSingleStep(areaSize.height() / 8);
1179 const pair<int, int> extents = v_extents();
1181 // Don't change the scrollbar range if there are no traces
1182 if (extents.first != extents.second)
1183 vscrollbar->setRange(extents.first - areaSize.height(),
1186 if (scroll_needs_defaults_) {
1187 set_scroll_default();
1188 scroll_needs_defaults_ = false;
1192 void View::reset_scroll()
1194 scrollarea_->verticalScrollBar()->setRange(0, 0);
1197 void View::set_scroll_default()
1201 const QSize areaSize = viewport_->size();
1203 const pair<int, int> extents = v_extents();
1204 const int trace_height = extents.second - extents.first;
1206 // Do all traces fit in the view?
1207 if (areaSize.height() >= trace_height)
1208 // Center all traces vertically
1209 set_v_offset(extents.first -
1210 ((areaSize.height() - trace_height) / 2));
1212 // Put the first trace at the top, letting the bottom ones overflow
1213 set_v_offset(extents.first);
1216 void View::determine_if_header_was_shrunk()
1218 const int header_pane_width =
1219 splitter_->sizes().front(); // clazy:exclude=detaching-temporary
1221 // Allow for a slight margin of error so that we also accept
1222 // slight differences when e.g. a label name change increased
1223 // the overall width
1224 header_was_shrunk_ = (header_pane_width < (header_width() - 10));
1227 void View::resize_header_to_fit()
1229 // Setting the maximum width of the header widget doesn't work as
1230 // expected because the splitter would allow the user to make the
1231 // pane wider than that, creating empty space as a result.
1232 // To make this work, we stricly enforce the maximum width by
1233 // expanding the header unless the user shrunk it on purpose.
1234 // As we're then setting the width of the header pane, we set the
1235 // splitter to the maximum allowed position.
1237 int splitter_area_width = 0;
1238 for (int w : splitter_->sizes()) // clazy:exclude=range-loop
1239 splitter_area_width += w;
1241 // Make sure the header has enough horizontal space to show all labels fully
1242 QList<int> pane_sizes;
1243 pane_sizes.push_back(header_->extended_size_hint().width());
1244 pane_sizes.push_back(splitter_area_width - header_->extended_size_hint().width());
1245 splitter_->setSizes(pane_sizes);
1248 void View::update_layout()
1253 TraceTreeItemOwner* View::find_prevalent_trace_group(
1254 const shared_ptr<sigrok::ChannelGroup> &group,
1255 const unordered_map<shared_ptr<data::SignalBase>, shared_ptr<Signal> >
1260 unordered_set<TraceTreeItemOwner*> owners;
1261 vector<TraceTreeItemOwner*> owner_list;
1263 // Make a set and a list of all the owners
1264 for (const auto& channel : group->channels()) {
1265 for (auto& entry : signal_map) {
1266 if (entry.first->channel() == channel) {
1267 TraceTreeItemOwner *const o = (entry.second)->owner();
1268 owner_list.push_back(o);
1274 // Iterate through the list of owners, and find the most prevalent
1275 size_t max_prevalence = 0;
1276 TraceTreeItemOwner *prevalent_owner = nullptr;
1277 for (TraceTreeItemOwner *owner : owners) {
1278 const size_t prevalence = count_if(
1279 owner_list.begin(), owner_list.end(),
1280 [&](TraceTreeItemOwner *o) { return o == owner; });
1281 if (prevalence > max_prevalence) {
1282 max_prevalence = prevalence;
1283 prevalent_owner = owner;
1287 return prevalent_owner;
1290 vector< shared_ptr<Trace> > View::extract_new_traces_for_channels(
1291 const vector< shared_ptr<sigrok::Channel> > &channels,
1292 const unordered_map<shared_ptr<data::SignalBase>, shared_ptr<Signal> >
1294 set< shared_ptr<Trace> > &add_list)
1296 vector< shared_ptr<Trace> > filtered_traces;
1298 for (const auto& channel : channels) {
1299 for (auto& entry : signal_map) {
1300 if (entry.first->channel() == channel) {
1301 shared_ptr<Trace> trace = entry.second;
1302 const auto list_iter = add_list.find(trace);
1303 if (list_iter == add_list.end())
1306 filtered_traces.push_back(trace);
1307 add_list.erase(list_iter);
1312 return filtered_traces;
1315 void View::determine_time_unit()
1317 // Check whether we know the sample rate and hence can use time as the unit
1318 if (time_unit_ == util::TimeUnit::Samples) {
1319 // Check all signals but...
1320 for (const shared_ptr<Signal>& signal : signals_) {
1321 const shared_ptr<SignalData> data = signal->data();
1323 // ...only check first segment of each
1324 const vector< shared_ptr<Segment> > segments = data->segments();
1325 if (!segments.empty())
1326 if (segments[0]->samplerate()) {
1327 set_time_unit(util::TimeUnit::Time);
1334 bool View::eventFilter(QObject *object, QEvent *event)
1336 const QEvent::Type type = event->type();
1337 if (type == QEvent::MouseMove) {
1340 hover_widget_ = qobject_cast<QWidget*>(object);
1342 const QMouseEvent *const mouse_event = (QMouseEvent*)event;
1343 if (object == viewport_)
1344 hover_point_ = mouse_event->pos();
1345 else if (object == ruler_)
1346 hover_point_ = mouse_event->pos();
1347 else if (object == header_)
1348 hover_point_ = QPoint(0, mouse_event->y());
1350 hover_point_ = QPoint(-1, -1);
1352 update_hover_point();
1354 } else if (type == QEvent::Leave) {
1355 hover_point_ = QPoint(-1, -1);
1356 update_hover_point();
1357 } else if (type == QEvent::Show) {
1359 // This is somewhat of a hack, unfortunately. We cannot use
1360 // set_v_offset() from within restore_settings() as the view
1361 // at that point is neither visible nor properly sized.
1362 // This is the least intrusive workaround I could come up
1363 // with: set the vertical offset (or scroll defaults) when
1364 // the view is shown, which happens after all widgets were
1365 // resized to their final sizes.
1368 if (settings_restored_)
1369 determine_if_header_was_shrunk();
1371 resize_header_to_fit();
1373 if (scroll_needs_defaults_) {
1374 set_scroll_default();
1375 scroll_needs_defaults_ = false;
1378 if (saved_v_offset_) {
1379 set_v_offset(saved_v_offset_);
1380 saved_v_offset_ = 0;
1384 return QObject::eventFilter(object, event);
1387 void View::contextMenuEvent(QContextMenuEvent *event)
1389 QPoint pos = event->pos() - QPoint(0, ruler_->sizeHint().height());
1391 const shared_ptr<ViewItem> r = viewport_->get_mouse_over_item(pos);
1395 QMenu *menu = r->create_view_context_menu(this, pos);
1397 menu->popup(event->globalPos());
1400 void View::resizeEvent(QResizeEvent* event)
1402 // Only adjust the top margin if we shrunk vertically
1403 if (event->size().height() < event->oldSize().height())
1404 adjust_top_margin();
1409 void View::update_hover_point()
1411 // Determine signal that the mouse cursor is hovering over
1412 signal_under_mouse_cursor_.reset();
1413 if (hover_widget_ == this) {
1414 for (const shared_ptr<Signal>& s : signals_) {
1415 const pair<int, int> extents = s->v_extents();
1416 const int top = s->get_visual_y() + extents.first;
1417 const int btm = s->get_visual_y() + extents.second;
1418 if ((hover_point_.y() >= top) && (hover_point_.y() <= btm)
1419 && s->base()->enabled())
1420 signal_under_mouse_cursor_ = s;
1424 // Update all trace tree items
1425 const vector<shared_ptr<TraceTreeItem>> trace_tree_items(
1426 list_by_type<TraceTreeItem>());
1427 for (const shared_ptr<TraceTreeItem>& r : trace_tree_items)
1428 r->hover_point_changed(hover_point_);
1430 // Notify any other listeners
1431 hover_point_changed(hover_widget_, hover_point_);
1434 void View::row_item_appearance_changed(bool label, bool content)
1439 viewport_->update();
1442 void View::time_item_appearance_changed(bool label, bool content)
1447 // Make sure the header pane width is updated, too
1452 viewport_->update();
1455 void View::extents_changed(bool horz, bool vert)
1458 (horz ? TraceTreeItemHExtentsChanged : 0) |
1459 (vert ? TraceTreeItemVExtentsChanged : 0);
1461 lazy_event_handler_.stop();
1462 lazy_event_handler_.start();
1465 void View::on_signal_name_changed()
1467 if (!header_was_shrunk_)
1468 resize_header_to_fit();
1471 void View::on_splitter_moved()
1473 // The header can only shrink when the splitter is moved manually
1474 determine_if_header_was_shrunk();
1476 if (!header_was_shrunk_)
1477 resize_header_to_fit();
1480 void View::h_scroll_value_changed(int value)
1482 if (updating_scroll_)
1485 // Disable sticky scrolling when user moves the horizontal scroll bar
1486 // during a running acquisition
1487 if (sticky_scrolling_ && (session_.get_capture_state() == Session::Running)) {
1488 sticky_scrolling_ = false;
1489 sticky_scrolling_changed(false);
1492 const int range = scrollarea_->horizontalScrollBar()->maximum();
1493 if (range < MaxScrollValue)
1494 set_offset(scale_ * value);
1498 get_scroll_layout(length, offset);
1499 set_offset(scale_ * length * value / MaxScrollValue);
1503 viewport_->update();
1506 void View::v_scroll_value_changed()
1509 viewport_->update();
1512 void View::signals_changed()
1514 using sigrok::Channel;
1516 vector< shared_ptr<Channel> > channels;
1517 shared_ptr<sigrok::Device> sr_dev;
1518 bool signals_added_or_removed = false;
1520 // Do we need to set the vertical scrollbar to its default position later?
1521 // We do if there are no traces, i.e. the scroll bar has no range set
1522 bool reset_scrollbar =
1523 (scrollarea_->verticalScrollBar()->minimum() ==
1524 scrollarea_->verticalScrollBar()->maximum());
1526 if (!session_.device()) {
1530 sr_dev = session_.device()->device();
1532 channels = sr_dev->channels();
1535 vector< shared_ptr<TraceTreeItem> > new_top_level_items;
1537 // Make a list of traces that are being added, and a list of traces
1538 // that are being removed
1539 const vector<shared_ptr<Trace>> prev_trace_list = list_by_type<Trace>();
1540 const set<shared_ptr<Trace>> prev_traces(
1541 prev_trace_list.begin(), prev_trace_list.end());
1543 set< shared_ptr<Trace> > traces(signals_.begin(), signals_.end());
1545 #ifdef ENABLE_DECODE
1546 traces.insert(decode_traces_.begin(), decode_traces_.end());
1549 set< shared_ptr<Trace> > add_traces;
1550 set_difference(traces.begin(), traces.end(),
1551 prev_traces.begin(), prev_traces.end(),
1552 inserter(add_traces, add_traces.begin()));
1554 set< shared_ptr<Trace> > remove_traces;
1555 set_difference(prev_traces.begin(), prev_traces.end(),
1556 traces.begin(), traces.end(),
1557 inserter(remove_traces, remove_traces.begin()));
1559 // Make a look-up table of sigrok Channels to pulseview Signals
1560 unordered_map<shared_ptr<data::SignalBase>, shared_ptr<Signal> >
1562 for (const shared_ptr<Signal>& sig : signals_)
1563 signal_map[sig->base()] = sig;
1565 // Populate channel groups
1567 for (auto& entry : sr_dev->channel_groups()) {
1568 const shared_ptr<sigrok::ChannelGroup> &group = entry.second;
1570 if (group->channels().size() <= 1)
1573 // Find best trace group to add to
1574 TraceTreeItemOwner *owner = find_prevalent_trace_group(
1577 // If there is no trace group, create one
1578 shared_ptr<TraceGroup> new_trace_group;
1580 new_trace_group.reset(new TraceGroup());
1581 owner = new_trace_group.get();
1584 // Extract traces for the trace group, removing them from
1586 const vector< shared_ptr<Trace> > new_traces_in_group =
1587 extract_new_traces_for_channels(group->channels(),
1588 signal_map, add_traces);
1590 // Add the traces to the group
1591 const pair<int, int> prev_v_extents = owner->v_extents();
1592 int offset = prev_v_extents.second - prev_v_extents.first;
1593 for (const shared_ptr<Trace>& trace : new_traces_in_group) {
1595 owner->add_child_item(trace);
1597 const pair<int, int> extents = trace->v_extents();
1598 if (trace->enabled())
1599 offset += -extents.first;
1600 trace->force_to_v_offset(offset);
1601 if (trace->enabled())
1602 offset += extents.second;
1605 if (new_trace_group) {
1606 // Assign proper vertical offsets to each channel in the group
1607 new_trace_group->restack_items();
1609 // If this is a new group, enqueue it in the new top level
1611 if (!new_traces_in_group.empty())
1612 new_top_level_items.push_back(new_trace_group);
1616 // Enqueue the remaining logic channels in a group
1617 vector< shared_ptr<Channel> > logic_channels;
1618 copy_if(channels.begin(), channels.end(), back_inserter(logic_channels),
1619 [](const shared_ptr<Channel>& c) {
1620 return c->type() == sigrok::ChannelType::LOGIC; });
1622 const vector< shared_ptr<Trace> > non_grouped_logic_signals =
1623 extract_new_traces_for_channels(logic_channels, signal_map, add_traces);
1625 if (non_grouped_logic_signals.size() > 0) {
1626 const shared_ptr<TraceGroup> non_grouped_trace_group(
1627 make_shared<TraceGroup>());
1628 for (const shared_ptr<Trace>& trace : non_grouped_logic_signals)
1629 non_grouped_trace_group->add_child_item(trace);
1631 non_grouped_trace_group->restack_items();
1632 new_top_level_items.push_back(non_grouped_trace_group);
1635 // Enqueue the remaining channels as free ungrouped traces
1636 const vector< shared_ptr<Trace> > new_top_level_signals =
1637 extract_new_traces_for_channels(channels, signal_map, add_traces);
1638 new_top_level_items.insert(new_top_level_items.end(),
1639 new_top_level_signals.begin(), new_top_level_signals.end());
1641 // Enqueue any remaining traces i.e. decode traces
1642 new_top_level_items.insert(new_top_level_items.end(),
1643 add_traces.begin(), add_traces.end());
1645 // Remove any removed traces
1646 for (const shared_ptr<Trace>& trace : remove_traces) {
1647 TraceTreeItemOwner *const owner = trace->owner();
1649 owner->remove_child_item(trace);
1650 signals_added_or_removed = true;
1653 // Remove any empty trace groups
1654 for (shared_ptr<TraceGroup> group : list_by_type<TraceGroup>())
1655 if (group->child_items().size() == 0) {
1656 remove_child_item(group);
1660 // Add and position the pending top levels items
1661 int offset = v_extents().second;
1662 for (auto item : new_top_level_items) {
1663 add_child_item(item);
1665 // Position the item after the last item or at the top if there is none
1666 const pair<int, int> extents = item->v_extents();
1668 if (item->enabled())
1669 offset += -extents.first;
1671 item->force_to_v_offset(offset);
1673 if (item->enabled())
1674 offset += extents.second;
1675 signals_added_or_removed = true;
1679 if (signals_added_or_removed && !header_was_shrunk_)
1680 resize_header_to_fit();
1685 viewport_->update();
1687 if (reset_scrollbar)
1688 set_scroll_default();
1691 void View::capture_state_updated(int state)
1693 GlobalSettings settings;
1695 if (state == Session::Running) {
1696 set_time_unit(util::TimeUnit::Samples);
1698 trigger_markers_.clear();
1700 scale_at_acq_start_ = scale_;
1701 offset_at_acq_start_ = offset_;
1703 // Activate "always zoom to fit" if the setting is enabled and we're
1704 // the main view of this session (other trace views may be used for
1705 // zooming and we don't want to mess them up)
1706 bool state = settings.value(GlobalSettings::Key_View_ZoomToFitDuringAcq).toBool();
1707 if (is_main_view_ && state) {
1708 always_zoom_to_fit_ = true;
1709 always_zoom_to_fit_changed(always_zoom_to_fit_);
1712 // Enable sticky scrolling if the setting is enabled
1713 sticky_scrolling_ = settings.value(GlobalSettings::Key_View_StickyScrolling).toBool();
1715 // Reset all traces to segment 0
1716 current_segment_ = 0;
1717 set_current_segment(current_segment_);
1720 if (state == Session::Stopped) {
1721 // After acquisition has stopped we need to re-calculate the ticks once
1722 // as it's otherwise done when the user pans or zooms, which is too late
1723 calculate_tick_spacing();
1725 // Reset "always zoom to fit", the acquisition has stopped
1726 if (always_zoom_to_fit_) {
1727 // Perform a final zoom-to-fit before disabling
1728 zoom_fit(always_zoom_to_fit_);
1729 always_zoom_to_fit_ = false;
1730 always_zoom_to_fit_changed(always_zoom_to_fit_);
1733 bool zoom_to_fit_after_acq =
1734 settings.value(GlobalSettings::Key_View_ZoomToFitAfterAcq).toBool();
1736 // Only perform zoom-to-fit if the user hasn't altered the viewport and
1737 // we didn't restore settings in the meanwhile
1738 if (zoom_to_fit_after_acq &&
1739 !suppress_zoom_to_fit_after_acq_ &&
1740 (scale_ == scale_at_acq_start_) &&
1741 (offset_ == offset_at_acq_start_))
1742 zoom_fit(false); // We're stopped, so the GUI state doesn't matter
1744 suppress_zoom_to_fit_after_acq_ = false;
1748 void View::on_new_segment(int new_segment_id)
1750 on_segment_changed(new_segment_id);
1753 void View::on_segment_completed(int segment_id)
1755 on_segment_changed(segment_id);
1758 void View::on_segment_changed(int segment)
1760 switch (segment_display_mode_) {
1761 case Trace::ShowLastSegmentOnly:
1762 case Trace::ShowSingleSegmentOnly:
1763 set_current_segment(segment);
1766 case Trace::ShowLastCompleteSegmentOnly:
1767 // Only update if all segments are complete
1768 if (session_.all_segments_complete(segment))
1769 set_current_segment(segment);
1772 case Trace::ShowAllSegments:
1773 case Trace::ShowAccumulatedIntensity:
1779 void View::on_settingViewTriggerIsZeroTime_changed(const QVariant new_value)
1781 if (new_value.toBool()) {
1782 // The first trigger for this segment is used as the zero position
1783 vector<util::Timestamp> triggers = session_.get_triggers(current_segment_);
1784 if (triggers.size() > 0)
1785 set_zero_position(triggers.front());
1787 reset_zero_position();
1790 void View::perform_delayed_view_update()
1792 if (always_zoom_to_fit_) {
1794 } else if (sticky_scrolling_) {
1795 // Make right side of the view sticky
1798 get_scroll_layout(length, offset);
1800 const QSize areaSize = viewport_->size();
1801 length = max(length - areaSize.width(), 0.0);
1803 set_offset(scale_ * length);
1806 determine_time_unit();
1809 viewport_->update();
1812 void View::process_sticky_events()
1814 if (sticky_events_ & TraceTreeItemHExtentsChanged)
1816 if (sticky_events_ & TraceTreeItemVExtentsChanged) {
1817 restack_all_trace_tree_items();
1821 // Clear the sticky events
1825 } // namespace trace
1826 } // namespace views