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_point_ = QPoint(-1, -1);
245 scroll_needs_defaults_ = true;
247 scale_at_acq_start_ = 0;
248 offset_at_acq_start_ = 0;
249 suppress_zoom_to_fit_after_acq_ = false;
251 show_cursors_ = false;
252 cursor_state_changed(show_cursors_);
255 // Update the zoom state
256 calculate_tick_spacing();
258 // Make sure the standard bar's segment selector is in sync
259 set_segment_display_mode(segment_display_mode_);
262 Session& View::session()
267 const Session& View::session() const
272 unordered_set< shared_ptr<Signal> > View::signals() const
277 void View::clear_signals()
279 ViewBase::clear_signalbases();
283 void View::add_signal(const shared_ptr<Signal> signal)
285 ViewBase::add_signalbase(signal->base());
286 signals_.insert(signal);
288 signal->set_segment_display_mode(segment_display_mode_);
289 signal->set_current_segment(current_segment_);
291 connect(signal->base().get(), SIGNAL(name_changed(const QString&)),
292 this, SLOT(on_signal_name_changed()));
296 void View::clear_decode_signals()
298 decode_traces_.clear();
301 void View::add_decode_signal(shared_ptr<data::DecodeSignal> signal)
303 shared_ptr<DecodeTrace> d(
304 new DecodeTrace(session_, signal, decode_traces_.size()));
305 decode_traces_.push_back(d);
307 d->set_segment_display_mode(segment_display_mode_);
308 d->set_current_segment(current_segment_);
310 connect(signal.get(), SIGNAL(name_changed(const QString&)),
311 this, SLOT(on_signal_name_changed()));
314 void View::remove_decode_signal(shared_ptr<data::DecodeSignal> signal)
316 for (auto i = decode_traces_.begin(); i != decode_traces_.end(); i++)
317 if ((*i)->base() == signal) {
318 decode_traces_.erase(i);
325 shared_ptr<Signal> View::get_signal_under_mouse_cursor() const
327 return signal_under_mouse_cursor_;
335 const View* View::view() const
340 Viewport* View::viewport()
345 const Viewport* View::viewport() const
350 void View::save_settings(QSettings &settings) const
352 settings.setValue("scale", scale_);
353 settings.setValue("v_offset",
354 scrollarea_->verticalScrollBar()->sliderPosition());
356 settings.setValue("splitter_state", splitter_->saveState());
357 settings.setValue("segment_display_mode", segment_display_mode_);
361 boost::archive::text_oarchive oa(ss);
362 oa << boost::serialization::make_nvp("ruler_shift", ruler_shift_);
363 settings.setValue("ruler_shift", QString::fromStdString(ss.str()));
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 (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("ruler_shift")) {
388 util::Timestamp shift;
390 ss << settings.value("ruler_shift").toString().toStdString();
393 boost::archive::text_iarchive ia(ss);
394 ia >> boost::serialization::make_nvp("ruler_shift", shift);
395 ruler_shift_ = shift;
396 } catch (boost::archive::archive_exception&) {
397 qDebug() << "Could not restore the view ruler shift";
401 if (settings.contains("offset")) {
402 util::Timestamp offset;
404 ss << settings.value("offset").toString().toStdString();
407 boost::archive::text_iarchive ia(ss);
408 ia >> boost::serialization::make_nvp("offset", offset);
409 // This also updates ruler_offset_
411 } catch (boost::archive::archive_exception&) {
412 qDebug() << "Could not restore the view offset";
416 if (settings.contains("splitter_state"))
417 splitter_->restoreState(settings.value("splitter_state").toByteArray());
419 if (settings.contains("segment_display_mode"))
420 set_segment_display_mode(
421 (Trace::SegmentDisplayMode)(settings.value("segment_display_mode").toInt()));
423 for (shared_ptr<Signal> signal : signals_) {
424 settings.beginGroup(signal->base()->internal_name());
425 signal->restore_settings(settings);
429 if (settings.contains("v_offset")) {
430 saved_v_offset_ = settings.value("v_offset").toInt();
431 set_v_offset(saved_v_offset_);
432 scroll_needs_defaults_ = false;
433 // Note: see eventFilter() for additional information
436 settings_restored_ = true;
437 suppress_zoom_to_fit_after_acq_ = true;
439 // Update the ruler so that it uses the new scale
440 calculate_tick_spacing();
443 vector< shared_ptr<TimeItem> > View::time_items() const
445 const vector<shared_ptr<Flag>> f(flags());
446 vector<shared_ptr<TimeItem>> items(f.begin(), f.end());
449 items.push_back(cursors_);
450 items.push_back(cursors_->first());
451 items.push_back(cursors_->second());
454 for (auto trigger_marker : trigger_markers_)
455 items.push_back(trigger_marker);
460 double View::scale() const
465 void View::set_scale(double scale)
467 if (scale_ != scale) {
473 void View::set_offset(const pv::util::Timestamp& offset, bool force_update)
475 if ((offset_ != offset) || force_update) {
477 ruler_offset_ = offset_ + ruler_shift_;
482 const Timestamp& View::offset() const
487 const Timestamp& View::ruler_offset() const
489 return ruler_offset_;
492 void View::set_zero_position(pv::util::Timestamp& position)
494 ruler_shift_ = -position;
496 // Force an immediate update of the offsets
497 set_offset(offset_, true);
501 void View::reset_zero_position()
505 // Force an immediate update of the offsets
506 set_offset(offset_, true);
510 int View::owner_visual_v_offset() const
512 return -scrollarea_->verticalScrollBar()->sliderPosition();
515 void View::set_v_offset(int offset)
517 scrollarea_->verticalScrollBar()->setSliderPosition(offset);
522 unsigned int View::depth() const
527 uint32_t View::current_segment() const
529 return current_segment_;
532 pv::util::SIPrefix View::tick_prefix() const
537 void View::set_tick_prefix(pv::util::SIPrefix tick_prefix)
539 if (tick_prefix_ != tick_prefix) {
540 tick_prefix_ = tick_prefix;
541 tick_prefix_changed();
545 unsigned int View::tick_precision() const
547 return tick_precision_;
550 void View::set_tick_precision(unsigned tick_precision)
552 if (tick_precision_ != tick_precision) {
553 tick_precision_ = tick_precision;
554 tick_precision_changed();
558 const pv::util::Timestamp& View::tick_period() const
563 unsigned int View::minor_tick_count() const
565 return minor_tick_count_;
568 void View::set_tick_period(const pv::util::Timestamp& tick_period)
570 if (tick_period_ != tick_period) {
571 tick_period_ = tick_period;
572 tick_period_changed();
576 TimeUnit View::time_unit() const
581 void View::set_time_unit(pv::util::TimeUnit time_unit)
583 if (time_unit_ != time_unit) {
584 time_unit_ = time_unit;
589 void View::set_current_segment(uint32_t segment_id)
591 current_segment_ = segment_id;
593 for (shared_ptr<Signal> signal : signals_)
594 signal->set_current_segment(current_segment_);
596 for (shared_ptr<DecodeTrace> dt : decode_traces_)
597 dt->set_current_segment(current_segment_);
600 vector<util::Timestamp> triggers = session_.get_triggers(current_segment_);
602 trigger_markers_.clear();
603 for (util::Timestamp timestamp : triggers)
604 trigger_markers_.push_back(make_shared<TriggerMarker>(*this, timestamp));
606 // When enabled, the first trigger for this segment is used as the zero position
607 GlobalSettings settings;
608 bool trigger_is_zero_time = settings.value(GlobalSettings::Key_View_TriggerIsZeroTime).toBool();
610 if (trigger_is_zero_time && (triggers.size() > 0))
611 set_zero_position(triggers.front());
615 segment_changed(segment_id);
618 bool View::segment_is_selectable() const
620 return segment_selectable_;
623 Trace::SegmentDisplayMode View::segment_display_mode() const
625 return segment_display_mode_;
628 void View::set_segment_display_mode(Trace::SegmentDisplayMode mode)
630 segment_display_mode_ = mode;
632 for (shared_ptr<Signal> signal : signals_)
633 signal->set_segment_display_mode(mode);
635 uint32_t last_segment = session_.get_segment_count() - 1;
638 case Trace::ShowLastSegmentOnly:
639 if (current_segment_ != last_segment)
640 set_current_segment(last_segment);
643 case Trace::ShowLastCompleteSegmentOnly:
644 // Do nothing if we only have one segment so far
645 if (last_segment > 0) {
646 // If the last segment isn't complete, the previous one must be
647 uint32_t segment_id =
648 (session_.all_segments_complete(last_segment)) ?
649 last_segment : last_segment - 1;
651 if (current_segment_ != segment_id)
652 set_current_segment(segment_id);
656 case Trace::ShowSingleSegmentOnly:
657 case Trace::ShowAllSegments:
658 case Trace::ShowAccumulatedIntensity:
660 // Current segment remains as-is
664 segment_selectable_ = true;
666 if ((mode == Trace::ShowAllSegments) || (mode == Trace::ShowAccumulatedIntensity))
667 segment_selectable_ = false;
671 segment_display_mode_changed((int)mode, segment_selectable_);
674 void View::zoom(double steps)
676 zoom(steps, viewport_->width() / 2);
679 void View::zoom(double steps, int offset)
681 set_zoom(scale_ * pow(3.0 / 2.0, -steps), offset);
684 void View::zoom_fit(bool gui_state)
686 // Act as one-shot when stopped, toggle along with the GUI otherwise
687 if (session_.get_capture_state() == Session::Stopped) {
688 always_zoom_to_fit_ = false;
689 always_zoom_to_fit_changed(false);
691 always_zoom_to_fit_ = gui_state;
692 always_zoom_to_fit_changed(gui_state);
695 const pair<Timestamp, Timestamp> extents = get_time_extents();
696 const Timestamp delta = extents.second - extents.first;
697 if (delta < Timestamp("1e-12"))
701 const int w = viewport_->width();
705 const Timestamp scale = max(min(delta / w, MaxScale), MinScale);
706 set_scale_offset(scale.convert_to<double>(), extents.first);
709 void View::set_scale_offset(double scale, const Timestamp& offset)
711 // Disable sticky scrolling / always zoom to fit when acquisition runs
712 // and user drags the viewport
713 if ((scale_ == scale) && (offset_ != offset) &&
714 (session_.get_capture_state() == Session::Running)) {
716 if (sticky_scrolling_) {
717 sticky_scrolling_ = false;
718 sticky_scrolling_changed(false);
721 if (always_zoom_to_fit_) {
722 always_zoom_to_fit_ = false;
723 always_zoom_to_fit_changed(false);
730 calculate_tick_spacing();
737 set< shared_ptr<SignalData> > View::get_visible_data() const
739 // Make a set of all the visible data objects
740 set< shared_ptr<SignalData> > visible_data;
741 for (const shared_ptr<Signal> sig : signals_)
743 visible_data.insert(sig->data());
748 pair<Timestamp, Timestamp> View::get_time_extents() const
750 boost::optional<Timestamp> left_time, right_time;
751 const set< shared_ptr<SignalData> > visible_data = get_visible_data();
752 for (const shared_ptr<SignalData> d : visible_data) {
753 const vector< shared_ptr<Segment> > segments = d->segments();
754 for (const shared_ptr<Segment> &s : segments) {
755 double samplerate = s->samplerate();
756 samplerate = (samplerate <= 0.0) ? 1.0 : samplerate;
758 const Timestamp start_time = s->start_time();
759 left_time = left_time ?
760 min(*left_time, start_time) :
762 right_time = right_time ?
763 max(*right_time, start_time + d->max_sample_count() / samplerate) :
764 start_time + d->max_sample_count() / samplerate;
768 if (!left_time || !right_time)
769 return make_pair(0, 0);
771 assert(*left_time < *right_time);
772 return make_pair(*left_time, *right_time);
775 void View::enable_show_sampling_points(bool state)
782 void View::enable_show_analog_minor_grid(bool state)
789 void View::enable_colored_bg(bool state)
795 bool View::colored_bg() const
800 bool View::cursors_shown() const
802 return show_cursors_;
805 void View::show_cursors(bool show)
807 show_cursors_ = show;
808 cursor_state_changed(show);
813 void View::centre_cursors()
816 const double time_width = scale_ * viewport_->width();
817 cursors_->first()->set_time(offset_ + time_width * 0.4);
818 cursors_->second()->set_time(offset_ + time_width * 0.6);
825 shared_ptr<CursorPair> View::cursors() const
830 void View::add_flag(const Timestamp& time)
832 flags_.push_back(make_shared<Flag>(*this, time,
833 QString("%1").arg(next_flag_text_)));
835 next_flag_text_ = (next_flag_text_ >= 'Z') ? 'A' :
836 (next_flag_text_ + 1);
838 time_item_appearance_changed(true, true);
841 void View::remove_flag(shared_ptr<Flag> flag)
844 time_item_appearance_changed(true, true);
847 vector< shared_ptr<Flag> > View::flags() const
849 vector< shared_ptr<Flag> > flags(flags_.begin(), flags_.end());
850 stable_sort(flags.begin(), flags.end(),
851 [](const shared_ptr<Flag> &a, const shared_ptr<Flag> &b) {
852 return a->time() < b->time();
858 const QPoint& View::hover_point() const
863 int64_t View::get_nearest_level_change(const QPoint &p)
865 if (snap_distance_ == 0)
868 shared_ptr<Signal> signal = signal_under_mouse_cursor_;
870 vector<data::LogicSegment::EdgePair> nearest_edges;
871 int64_t nearest_sample = -1;
874 // Determine nearest edge from specific signal
876 // Calculate sample number from cursor position
877 const double samples_per_pixel = signal->base()->get_samplerate() * scale();
878 const int64_t x_offset = offset().convert_to<double>() / scale();
879 const int64_t sample_num = max(((x_offset + p.x()) * samples_per_pixel), 0.0);
881 nearest_edges = signal->get_nearest_level_changes(sample_num);
883 if (nearest_edges.size() != 2)
886 // We received absolute sample numbers, make them relative
887 const int64_t left_sample_delta = sample_num - nearest_edges.front().first;
888 const int64_t right_sample_delta = nearest_edges.back().first - sample_num - 1;
890 const int64_t left_delta = left_sample_delta / samples_per_pixel;
891 const int64_t right_delta = right_sample_delta / samples_per_pixel;
893 // Only use closest left or right edge if they're close to the cursor
894 if ((left_delta < right_delta) && (left_delta <= snap_distance_))
895 nearest_sample = nearest_edges.front().first;
896 if ((left_delta >= right_delta) && (right_delta <= snap_distance_))
897 nearest_sample = nearest_edges.back().first;
899 // Determine nearest edge from all signals
901 int64_t nearest_delta = numeric_limits<int64_t>::max();
902 for (shared_ptr<Signal> s : signals_) {
906 // Calculate sample number from cursor position
907 const double samples_per_pixel = s->base()->get_samplerate() * scale();
908 const int64_t x_offset = offset().convert_to<double>() / scale();
909 const int64_t sample_num = max(((x_offset + p.x()) * samples_per_pixel), 0.0);
911 vector<data::LogicSegment::EdgePair> edges =
912 s->get_nearest_level_changes(sample_num);
914 if (edges.size() != 2)
917 // We received absolute sample numbers, make them relative
918 const int64_t left_sample_delta = sample_num - edges.front().first;
919 const int64_t right_sample_delta = edges.back().first - sample_num - 1;
921 const int64_t left_delta = left_sample_delta / samples_per_pixel;
922 const int64_t right_delta = right_sample_delta / samples_per_pixel;
924 if ((left_delta < nearest_delta) || (right_delta < nearest_delta)) {
925 nearest_delta = min(left_delta, right_delta);
927 if (nearest_delta <= snap_distance_)
928 nearest_sample = (nearest_delta == left_delta) ?
929 edges.front().first : edges.back().first;
931 // Somewhat ugly hack to make TimeItem::drag_by() work
932 signal_under_mouse_cursor_ = s;
937 return nearest_sample;
940 void View::restack_all_trace_tree_items()
942 // Make a list of owners that is sorted from deepest first
943 const vector<shared_ptr<TraceTreeItem>> items(
944 list_by_type<TraceTreeItem>());
945 set< TraceTreeItemOwner* > owners;
946 for (const auto &r : items)
947 owners.insert(r->owner());
948 vector< TraceTreeItemOwner* > sorted_owners(owners.begin(), owners.end());
949 sort(sorted_owners.begin(), sorted_owners.end(),
950 [](const TraceTreeItemOwner* a, const TraceTreeItemOwner *b) {
951 return a->depth() > b->depth(); });
953 // Restack the items recursively
954 for (auto &o : sorted_owners)
957 // Animate the items to their destination
958 for (const auto &i : items)
959 i->animate_to_layout_v_offset();
962 int View::header_width() const
964 return header_->extended_size_hint().width();
967 void View::on_setting_changed(const QString &key, const QVariant &value)
969 if (key == GlobalSettings::Key_View_TriggerIsZeroTime)
970 on_settingViewTriggerIsZeroTime_changed(value);
972 if (key == GlobalSettings::Key_View_SnapDistance) {
973 GlobalSettings settings;
974 snap_distance_ = settings.value(GlobalSettings::Key_View_SnapDistance).toInt();
978 void View::trigger_event(int segment_id, util::Timestamp location)
980 // TODO This doesn't work if we're showing multiple segments at once
981 if ((uint32_t)segment_id != current_segment_)
984 // Set zero location if the Key_View_TriggerIsZeroTime setting is set and
985 // if this is the first trigger for this segment.
986 GlobalSettings settings;
987 bool trigger_is_zero_time = settings.value(GlobalSettings::Key_View_TriggerIsZeroTime).toBool();
989 size_t trigger_count = session_.get_triggers(current_segment_).size();
991 if (trigger_is_zero_time && trigger_count == 1)
992 set_zero_position(location);
994 trigger_markers_.push_back(make_shared<TriggerMarker>(*this, location));
997 void View::get_scroll_layout(double &length, Timestamp &offset) const
999 const pair<Timestamp, Timestamp> extents = get_time_extents();
1000 length = ((extents.second - extents.first) / scale_).convert_to<double>();
1001 offset = offset_ / scale_;
1004 void View::set_zoom(double scale, int offset)
1006 // Reset the "always zoom to fit" feature as the user changed the zoom
1007 always_zoom_to_fit_ = false;
1008 always_zoom_to_fit_changed(false);
1010 const Timestamp cursor_offset = offset_ + scale_ * offset;
1011 const Timestamp new_scale = max(min(Timestamp(scale), MaxScale), MinScale);
1012 const Timestamp new_offset = cursor_offset - new_scale * offset;
1013 set_scale_offset(new_scale.convert_to<double>(), new_offset);
1016 void View::calculate_tick_spacing()
1018 const double SpacingIncrement = 10.0f;
1019 const double MinValueSpacing = 40.0f;
1021 // Figure out the highest numeric value visible on a label
1022 const QSize areaSize = viewport_->size();
1023 const Timestamp max_time = max(fabs(offset_),
1024 fabs(offset_ + scale_ * areaSize.width()));
1026 double min_width = SpacingIncrement;
1027 double label_width, tick_period_width;
1029 QFontMetrics m(QApplication::font());
1031 // Copies of the member variables with the same name, used in the calculation
1032 // and written back afterwards, so that we don't emit signals all the time
1033 // during the calculation.
1034 pv::util::Timestamp tick_period = tick_period_;
1035 pv::util::SIPrefix tick_prefix = tick_prefix_;
1036 unsigned tick_precision = tick_precision_;
1039 const double min_period = scale_ * min_width;
1041 const int order = (int)floorf(log10f(min_period));
1042 const pv::util::Timestamp order_decimal =
1043 pow(pv::util::Timestamp(10), order);
1045 // Allow for a margin of error so that a scale unit of 1 can be used.
1046 // Otherwise, for a SU of 1 the tick period will almost always be below
1047 // the min_period by a small amount - and thus skipped in favor of 2.
1048 // Note: margin assumes that SU[0] and SU[1] contain the smallest values
1049 double tp_margin = (ScaleUnits[0] + ScaleUnits[1]) / 2.0;
1050 double tp_with_margin;
1051 unsigned int unit = 0;
1054 tp_with_margin = order_decimal.convert_to<double>() *
1055 (ScaleUnits[unit++] + tp_margin);
1056 } while (tp_with_margin < min_period && unit < countof(ScaleUnits));
1058 minor_tick_count_ = (unit == 2) ? 4 : 5;
1059 tick_period = order_decimal * ScaleUnits[unit - 1];
1060 tick_prefix = static_cast<pv::util::SIPrefix>(
1061 (order - pv::util::exponent(pv::util::SIPrefix::yocto)) / 3);
1063 // Precision is the number of fractional digits required, not
1064 // taking the prefix into account (and it must never be negative)
1065 tick_precision = max(ceil(log10(1 / tick_period)).convert_to<int>(), 0);
1067 tick_period_width = (tick_period / scale_).convert_to<double>();
1069 const QString label_text = Ruler::format_time_with_distance(
1070 tick_period, max_time, tick_prefix, time_unit_, tick_precision);
1072 label_width = m.boundingRect(0, 0, INT_MAX, INT_MAX,
1073 Qt::AlignLeft | Qt::AlignTop, label_text).width() +
1076 min_width += SpacingIncrement;
1077 } while (tick_period_width < label_width);
1079 set_tick_period(tick_period);
1080 set_tick_prefix(tick_prefix);
1081 set_tick_precision(tick_precision);
1084 void View::adjust_top_margin()
1088 const QSize areaSize = viewport_->size();
1090 const pair<int, int> extents = v_extents();
1091 const int top_margin = owner_visual_v_offset() + extents.first;
1092 const int trace_bottom = owner_visual_v_offset() + extents.first + extents.second;
1094 // Do we have empty space at the top while the last trace goes out of screen?
1095 if ((top_margin > 0) && (trace_bottom > areaSize.height())) {
1096 const int trace_height = extents.second - extents.first;
1098 // Center everything vertically if there is enough space
1099 if (areaSize.height() >= trace_height)
1100 set_v_offset(extents.first -
1101 ((areaSize.height() - trace_height) / 2));
1103 // Remove the top margin to make as many traces fit on screen as possible
1104 set_v_offset(extents.first);
1108 void View::update_scroll()
1111 QScrollBar *hscrollbar = scrollarea_->horizontalScrollBar();
1112 QScrollBar *vscrollbar = scrollarea_->verticalScrollBar();
1114 const QSize areaSize = viewport_->size();
1116 // Set the horizontal scroll bar
1119 get_scroll_layout(length, offset);
1120 length = max(length - areaSize.width(), 0.0);
1122 int major_tick_distance = (tick_period_ / scale_).convert_to<int>();
1124 hscrollbar->setPageStep(areaSize.width() / 2);
1125 hscrollbar->setSingleStep(major_tick_distance);
1127 updating_scroll_ = true;
1129 if (length < MaxScrollValue) {
1130 hscrollbar->setRange(0, length);
1131 hscrollbar->setSliderPosition(offset.convert_to<double>());
1133 hscrollbar->setRange(0, MaxScrollValue);
1134 hscrollbar->setSliderPosition(
1135 (offset_ * MaxScrollValue / (scale_ * length)).convert_to<double>());
1138 updating_scroll_ = false;
1140 // Set the vertical scrollbar
1141 vscrollbar->setPageStep(areaSize.height());
1142 vscrollbar->setSingleStep(areaSize.height() / 8);
1144 const pair<int, int> extents = v_extents();
1146 // Don't change the scrollbar range if there are no traces
1147 if (extents.first != extents.second)
1148 vscrollbar->setRange(extents.first - areaSize.height(),
1151 if (scroll_needs_defaults_) {
1152 set_scroll_default();
1153 scroll_needs_defaults_ = false;
1157 void View::reset_scroll()
1159 scrollarea_->verticalScrollBar()->setRange(0, 0);
1162 void View::set_scroll_default()
1166 const QSize areaSize = viewport_->size();
1168 const pair<int, int> extents = v_extents();
1169 const int trace_height = extents.second - extents.first;
1171 // Do all traces fit in the view?
1172 if (areaSize.height() >= trace_height)
1173 // Center all traces vertically
1174 set_v_offset(extents.first -
1175 ((areaSize.height() - trace_height) / 2));
1177 // Put the first trace at the top, letting the bottom ones overflow
1178 set_v_offset(extents.first);
1181 void View::determine_if_header_was_shrunk()
1183 const int header_pane_width = splitter_->sizes().front();
1185 // Allow for a slight margin of error so that we also accept
1186 // slight differences when e.g. a label name change increased
1187 // the overall width
1188 header_was_shrunk_ = (header_pane_width < (header_width() - 10));
1191 void View::resize_header_to_fit()
1193 // Setting the maximum width of the header widget doesn't work as
1194 // expected because the splitter would allow the user to make the
1195 // pane wider than that, creating empty space as a result.
1196 // To make this work, we stricly enforce the maximum width by
1197 // expanding the header unless the user shrunk it on purpose.
1198 // As we're then setting the width of the header pane, we set the
1199 // splitter to the maximum allowed position.
1201 int splitter_area_width = 0;
1202 for (int w : splitter_->sizes())
1203 splitter_area_width += w;
1205 // Make sure the header has enough horizontal space to show all labels fully
1206 QList<int> pane_sizes;
1207 pane_sizes.push_back(header_->extended_size_hint().width());
1208 pane_sizes.push_back(splitter_area_width - header_->extended_size_hint().width());
1209 splitter_->setSizes(pane_sizes);
1212 void View::update_layout()
1217 TraceTreeItemOwner* View::find_prevalent_trace_group(
1218 const shared_ptr<sigrok::ChannelGroup> &group,
1219 const unordered_map<shared_ptr<data::SignalBase>, shared_ptr<Signal> >
1224 unordered_set<TraceTreeItemOwner*> owners;
1225 vector<TraceTreeItemOwner*> owner_list;
1227 // Make a set and a list of all the owners
1228 for (const auto &channel : group->channels()) {
1229 for (auto entry : signal_map) {
1230 if (entry.first->channel() == channel) {
1231 TraceTreeItemOwner *const o = (entry.second)->owner();
1232 owner_list.push_back(o);
1238 // Iterate through the list of owners, and find the most prevalent
1239 size_t max_prevalence = 0;
1240 TraceTreeItemOwner *prevalent_owner = nullptr;
1241 for (TraceTreeItemOwner *owner : owners) {
1242 const size_t prevalence = count_if(
1243 owner_list.begin(), owner_list.end(),
1244 [&](TraceTreeItemOwner *o) { return o == owner; });
1245 if (prevalence > max_prevalence) {
1246 max_prevalence = prevalence;
1247 prevalent_owner = owner;
1251 return prevalent_owner;
1254 vector< shared_ptr<Trace> > View::extract_new_traces_for_channels(
1255 const vector< shared_ptr<sigrok::Channel> > &channels,
1256 const unordered_map<shared_ptr<data::SignalBase>, shared_ptr<Signal> >
1258 set< shared_ptr<Trace> > &add_list)
1260 vector< shared_ptr<Trace> > filtered_traces;
1262 for (const auto &channel : channels) {
1263 for (auto entry : signal_map) {
1264 if (entry.first->channel() == channel) {
1265 shared_ptr<Trace> trace = entry.second;
1266 const auto list_iter = add_list.find(trace);
1267 if (list_iter == add_list.end())
1270 filtered_traces.push_back(trace);
1271 add_list.erase(list_iter);
1276 return filtered_traces;
1279 void View::determine_time_unit()
1281 // Check whether we know the sample rate and hence can use time as the unit
1282 if (time_unit_ == util::TimeUnit::Samples) {
1283 // Check all signals but...
1284 for (const shared_ptr<Signal> signal : signals_) {
1285 const shared_ptr<SignalData> data = signal->data();
1287 // ...only check first segment of each
1288 const vector< shared_ptr<Segment> > segments = data->segments();
1289 if (!segments.empty())
1290 if (segments[0]->samplerate()) {
1291 set_time_unit(util::TimeUnit::Time);
1298 bool View::eventFilter(QObject *object, QEvent *event)
1300 const QEvent::Type type = event->type();
1301 if (type == QEvent::MouseMove) {
1303 const QMouseEvent *const mouse_event = (QMouseEvent*)event;
1304 if (object == viewport_)
1305 hover_point_ = mouse_event->pos();
1306 else if (object == ruler_)
1307 // Adjust the hover point's y coordinate so that it's relative to
1308 // the top of the viewport. The result may be negative.
1309 hover_point_ = QPoint(mouse_event->pos().x(),
1310 mouse_event->pos().y() - ruler_->sizeHint().height());
1311 else if (object == header_)
1312 hover_point_ = QPoint(0, mouse_event->y());
1314 hover_point_ = QPoint(-1, -1);
1316 update_hover_point();
1318 } else if (type == QEvent::Leave) {
1319 hover_point_ = QPoint(-1, -1);
1320 update_hover_point();
1321 } else if (type == QEvent::Show) {
1323 // This is somewhat of a hack, unfortunately. We cannot use
1324 // set_v_offset() from within restore_settings() as the view
1325 // at that point is neither visible nor properly sized.
1326 // This is the least intrusive workaround I could come up
1327 // with: set the vertical offset (or scroll defaults) when
1328 // the view is shown, which happens after all widgets were
1329 // resized to their final sizes.
1332 if (settings_restored_)
1333 determine_if_header_was_shrunk();
1335 resize_header_to_fit();
1337 if (scroll_needs_defaults_) {
1338 set_scroll_default();
1339 scroll_needs_defaults_ = false;
1342 if (saved_v_offset_) {
1343 set_v_offset(saved_v_offset_);
1344 saved_v_offset_ = 0;
1348 return QObject::eventFilter(object, event);
1351 void View::contextMenuEvent(QContextMenuEvent *event)
1353 QPoint pos = event->pos() - QPoint(0, ruler_->sizeHint().height());
1355 const shared_ptr<ViewItem> r = viewport_->get_mouse_over_item(pos);
1359 QMenu *menu = r->create_view_context_menu(this, pos);
1361 menu->exec(event->globalPos());
1364 void View::resizeEvent(QResizeEvent* event)
1366 // Only adjust the top margin if we shrunk vertically
1367 if (event->size().height() < event->oldSize().height())
1368 adjust_top_margin();
1373 void View::update_hover_point()
1375 // Determine signal that the mouse cursor is hovering over
1376 signal_under_mouse_cursor_.reset();
1377 for (shared_ptr<Signal> s : signals_) {
1378 const pair<int, int> extents = s->v_extents();
1379 const int top = s->get_visual_y() + extents.first;
1380 const int btm = s->get_visual_y() + extents.second;
1381 if ((hover_point_.y() >= top) && (hover_point_.y() <= btm)
1382 && s->base()->enabled())
1383 signal_under_mouse_cursor_ = s;
1386 // Update all trace tree items
1387 const vector<shared_ptr<TraceTreeItem>> trace_tree_items(
1388 list_by_type<TraceTreeItem>());
1389 for (shared_ptr<TraceTreeItem> r : trace_tree_items)
1390 r->hover_point_changed(hover_point_);
1392 // Notify any other listeners
1393 hover_point_changed(hover_point_);
1396 void View::row_item_appearance_changed(bool label, bool content)
1401 viewport_->update();
1404 void View::time_item_appearance_changed(bool label, bool content)
1409 // Make sure the header pane width is updated, too
1414 viewport_->update();
1417 void View::extents_changed(bool horz, bool vert)
1420 (horz ? TraceTreeItemHExtentsChanged : 0) |
1421 (vert ? TraceTreeItemVExtentsChanged : 0);
1423 lazy_event_handler_.stop();
1424 lazy_event_handler_.start();
1427 void View::on_signal_name_changed()
1429 if (!header_was_shrunk_)
1430 resize_header_to_fit();
1433 void View::on_splitter_moved()
1435 // The header can only shrink when the splitter is moved manually
1436 determine_if_header_was_shrunk();
1438 if (!header_was_shrunk_)
1439 resize_header_to_fit();
1442 void View::h_scroll_value_changed(int value)
1444 if (updating_scroll_)
1447 // Disable sticky scrolling when user moves the horizontal scroll bar
1448 // during a running acquisition
1449 if (sticky_scrolling_ && (session_.get_capture_state() == Session::Running)) {
1450 sticky_scrolling_ = false;
1451 sticky_scrolling_changed(false);
1454 const int range = scrollarea_->horizontalScrollBar()->maximum();
1455 if (range < MaxScrollValue)
1456 set_offset(scale_ * value);
1460 get_scroll_layout(length, offset);
1461 set_offset(scale_ * length * value / MaxScrollValue);
1465 viewport_->update();
1468 void View::v_scroll_value_changed()
1471 viewport_->update();
1474 void View::signals_changed()
1476 using sigrok::Channel;
1478 vector< shared_ptr<Channel> > channels;
1479 shared_ptr<sigrok::Device> sr_dev;
1480 bool signals_added_or_removed = false;
1482 // Do we need to set the vertical scrollbar to its default position later?
1483 // We do if there are no traces, i.e. the scroll bar has no range set
1484 bool reset_scrollbar =
1485 (scrollarea_->verticalScrollBar()->minimum() ==
1486 scrollarea_->verticalScrollBar()->maximum());
1488 if (!session_.device()) {
1492 sr_dev = session_.device()->device();
1494 channels = sr_dev->channels();
1497 vector< shared_ptr<TraceTreeItem> > new_top_level_items;
1499 // Make a list of traces that are being added, and a list of traces
1500 // that are being removed
1501 const vector<shared_ptr<Trace>> prev_trace_list = list_by_type<Trace>();
1502 const set<shared_ptr<Trace>> prev_traces(
1503 prev_trace_list.begin(), prev_trace_list.end());
1505 set< shared_ptr<Trace> > traces(signals_.begin(), signals_.end());
1507 #ifdef ENABLE_DECODE
1508 traces.insert(decode_traces_.begin(), decode_traces_.end());
1511 set< shared_ptr<Trace> > add_traces;
1512 set_difference(traces.begin(), traces.end(),
1513 prev_traces.begin(), prev_traces.end(),
1514 inserter(add_traces, add_traces.begin()));
1516 set< shared_ptr<Trace> > remove_traces;
1517 set_difference(prev_traces.begin(), prev_traces.end(),
1518 traces.begin(), traces.end(),
1519 inserter(remove_traces, remove_traces.begin()));
1521 // Make a look-up table of sigrok Channels to pulseview Signals
1522 unordered_map<shared_ptr<data::SignalBase>, shared_ptr<Signal> >
1524 for (const shared_ptr<Signal> &sig : signals_)
1525 signal_map[sig->base()] = sig;
1527 // Populate channel groups
1529 for (auto entry : sr_dev->channel_groups()) {
1530 const shared_ptr<sigrok::ChannelGroup> &group = entry.second;
1532 if (group->channels().size() <= 1)
1535 // Find best trace group to add to
1536 TraceTreeItemOwner *owner = find_prevalent_trace_group(
1539 // If there is no trace group, create one
1540 shared_ptr<TraceGroup> new_trace_group;
1542 new_trace_group.reset(new TraceGroup());
1543 owner = new_trace_group.get();
1546 // Extract traces for the trace group, removing them from
1548 const vector< shared_ptr<Trace> > new_traces_in_group =
1549 extract_new_traces_for_channels(group->channels(),
1550 signal_map, add_traces);
1552 // Add the traces to the group
1553 const pair<int, int> prev_v_extents = owner->v_extents();
1554 int offset = prev_v_extents.second - prev_v_extents.first;
1555 for (shared_ptr<Trace> trace : new_traces_in_group) {
1557 owner->add_child_item(trace);
1559 const pair<int, int> extents = trace->v_extents();
1560 if (trace->enabled())
1561 offset += -extents.first;
1562 trace->force_to_v_offset(offset);
1563 if (trace->enabled())
1564 offset += extents.second;
1567 if (new_trace_group) {
1568 // Assign proper vertical offsets to each channel in the group
1569 new_trace_group->restack_items();
1571 // If this is a new group, enqueue it in the new top level
1573 if (!new_traces_in_group.empty())
1574 new_top_level_items.push_back(new_trace_group);
1578 // Enqueue the remaining logic channels in a group
1579 vector< shared_ptr<Channel> > logic_channels;
1580 copy_if(channels.begin(), channels.end(), back_inserter(logic_channels),
1581 [](const shared_ptr<Channel>& c) {
1582 return c->type() == sigrok::ChannelType::LOGIC; });
1584 const vector< shared_ptr<Trace> > non_grouped_logic_signals =
1585 extract_new_traces_for_channels(logic_channels, signal_map, add_traces);
1587 if (non_grouped_logic_signals.size() > 0) {
1588 const shared_ptr<TraceGroup> non_grouped_trace_group(
1589 make_shared<TraceGroup>());
1590 for (shared_ptr<Trace> trace : non_grouped_logic_signals)
1591 non_grouped_trace_group->add_child_item(trace);
1593 non_grouped_trace_group->restack_items();
1594 new_top_level_items.push_back(non_grouped_trace_group);
1597 // Enqueue the remaining channels as free ungrouped traces
1598 const vector< shared_ptr<Trace> > new_top_level_signals =
1599 extract_new_traces_for_channels(channels, signal_map, add_traces);
1600 new_top_level_items.insert(new_top_level_items.end(),
1601 new_top_level_signals.begin(), new_top_level_signals.end());
1603 // Enqueue any remaining traces i.e. decode traces
1604 new_top_level_items.insert(new_top_level_items.end(),
1605 add_traces.begin(), add_traces.end());
1607 // Remove any removed traces
1608 for (shared_ptr<Trace> trace : remove_traces) {
1609 TraceTreeItemOwner *const owner = trace->owner();
1611 owner->remove_child_item(trace);
1612 signals_added_or_removed = true;
1615 // Remove any empty trace groups
1616 for (shared_ptr<TraceGroup> group : list_by_type<TraceGroup>())
1617 if (group->child_items().size() == 0) {
1618 remove_child_item(group);
1622 // Add and position the pending top levels items
1623 int offset = v_extents().second;
1624 for (auto item : new_top_level_items) {
1625 add_child_item(item);
1627 // Position the item after the last item or at the top if there is none
1628 const pair<int, int> extents = item->v_extents();
1630 if (item->enabled())
1631 offset += -extents.first;
1633 item->force_to_v_offset(offset);
1635 if (item->enabled())
1636 offset += extents.second;
1637 signals_added_or_removed = true;
1641 if (signals_added_or_removed && !header_was_shrunk_)
1642 resize_header_to_fit();
1647 viewport_->update();
1649 if (reset_scrollbar)
1650 set_scroll_default();
1653 void View::capture_state_updated(int state)
1655 GlobalSettings settings;
1657 if (state == Session::Running) {
1658 set_time_unit(util::TimeUnit::Samples);
1660 trigger_markers_.clear();
1662 scale_at_acq_start_ = scale_;
1663 offset_at_acq_start_ = offset_;
1665 // Activate "always zoom to fit" if the setting is enabled and we're
1666 // the main view of this session (other trace views may be used for
1667 // zooming and we don't want to mess them up)
1668 bool state = settings.value(GlobalSettings::Key_View_ZoomToFitDuringAcq).toBool();
1669 if (is_main_view_ && state) {
1670 always_zoom_to_fit_ = true;
1671 always_zoom_to_fit_changed(always_zoom_to_fit_);
1674 // Enable sticky scrolling if the setting is enabled
1675 sticky_scrolling_ = settings.value(GlobalSettings::Key_View_StickyScrolling).toBool();
1677 // Reset all traces to segment 0
1678 current_segment_ = 0;
1679 set_current_segment(current_segment_);
1682 if (state == Session::Stopped) {
1683 // After acquisition has stopped we need to re-calculate the ticks once
1684 // as it's otherwise done when the user pans or zooms, which is too late
1685 calculate_tick_spacing();
1687 // Reset "always zoom to fit", the acquisition has stopped
1688 if (always_zoom_to_fit_) {
1689 // Perform a final zoom-to-fit before disabling
1690 zoom_fit(always_zoom_to_fit_);
1691 always_zoom_to_fit_ = false;
1692 always_zoom_to_fit_changed(always_zoom_to_fit_);
1695 bool zoom_to_fit_after_acq =
1696 settings.value(GlobalSettings::Key_View_ZoomToFitAfterAcq).toBool();
1698 // Only perform zoom-to-fit if the user hasn't altered the viewport and
1699 // we didn't restore settings in the meanwhile
1700 if (zoom_to_fit_after_acq &&
1701 !suppress_zoom_to_fit_after_acq_ &&
1702 (scale_ == scale_at_acq_start_) &&
1703 (offset_ == offset_at_acq_start_))
1704 zoom_fit(false); // We're stopped, so the GUI state doesn't matter
1706 suppress_zoom_to_fit_after_acq_ = false;
1710 void View::on_new_segment(int new_segment_id)
1712 on_segment_changed(new_segment_id);
1715 void View::on_segment_completed(int segment_id)
1717 on_segment_changed(segment_id);
1720 void View::on_segment_changed(int segment)
1722 switch (segment_display_mode_) {
1723 case Trace::ShowLastSegmentOnly:
1724 case Trace::ShowSingleSegmentOnly:
1725 set_current_segment(segment);
1728 case Trace::ShowLastCompleteSegmentOnly:
1729 // Only update if all segments are complete
1730 if (session_.all_segments_complete(segment))
1731 set_current_segment(segment);
1734 case Trace::ShowAllSegments:
1735 case Trace::ShowAccumulatedIntensity:
1741 void View::on_settingViewTriggerIsZeroTime_changed(const QVariant new_value)
1743 if (new_value.toBool()) {
1744 // The first trigger for this segment is used as the zero position
1745 vector<util::Timestamp> triggers = session_.get_triggers(current_segment_);
1746 if (triggers.size() > 0)
1747 set_zero_position(triggers.front());
1749 reset_zero_position();
1752 void View::perform_delayed_view_update()
1754 if (always_zoom_to_fit_) {
1756 } else if (sticky_scrolling_) {
1757 // Make right side of the view sticky
1760 get_scroll_layout(length, offset);
1762 const QSize areaSize = viewport_->size();
1763 length = max(length - areaSize.width(), 0.0);
1765 set_offset(scale_ * length);
1768 determine_time_unit();
1771 viewport_->update();
1774 void View::process_sticky_events()
1776 if (sticky_events_ & TraceTreeItemHExtentsChanged)
1778 if (sticky_events_ & TraceTreeItemVExtentsChanged) {
1779 restack_all_trace_tree_items();
1783 // Clear the sticky events
1787 } // namespace trace
1788 } // namespace views