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()
134 scroll_needs_defaults_(true)
136 QVBoxLayout *root_layout = new QVBoxLayout(this);
137 root_layout->setContentsMargins(0, 0, 0, 0);
138 root_layout->addWidget(splitter_);
140 viewport_ = new Viewport(*this);
141 scrollarea_ = new CustomScrollArea(splitter_);
142 scrollarea_->setViewport(viewport_);
143 scrollarea_->setFrameShape(QFrame::NoFrame);
145 ruler_ = new Ruler(*this);
147 header_ = new Header(*this);
148 header_->setMinimumWidth(10); // So that the arrow tips show at least
150 // We put the header into a simple layout so that we can add the top margin,
151 // allowing us to make it line up with the bottom of the ruler
152 QWidget *header_container = new QWidget();
153 header_container->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
154 QVBoxLayout *header_layout = new QVBoxLayout(header_container);
155 header_layout->setContentsMargins(0, ruler_->sizeHint().height(), 0, 0);
156 header_layout->addWidget(header_);
158 // To let the ruler and scrollarea be on the same split pane, we need a layout
159 QWidget *trace_container = new QWidget();
160 trace_container->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
161 QVBoxLayout *trace_layout = new QVBoxLayout(trace_container);
162 trace_layout->setSpacing(0); // We don't want space between the ruler and scrollarea
163 trace_layout->setContentsMargins(0, 0, 0, 0);
164 trace_layout->addWidget(ruler_);
165 trace_layout->addWidget(scrollarea_);
167 splitter_->addWidget(header_container);
168 splitter_->addWidget(trace_container);
169 splitter_->setHandleWidth(1); // Don't show a visible rubber band
170 splitter_->setCollapsible(0, false); // Prevent the header from collapsing
171 splitter_->setCollapsible(1, false); // Prevent the traces from collapsing
172 splitter_->setStretchFactor(0, 0); // Prevent the panes from being resized
173 splitter_->setStretchFactor(1, 1); // when the entire view is resized
174 splitter_->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
176 viewport_->installEventFilter(this);
177 ruler_->installEventFilter(this);
178 header_->installEventFilter(this);
180 // Set up settings and event handlers
181 GlobalSettings settings;
182 colored_bg_ = settings.value(GlobalSettings::Key_View_ColoredBG).toBool();
183 snap_distance_ = settings.value(GlobalSettings::Key_View_SnapDistance).toInt();
185 GlobalSettings::add_change_handler(this);
187 connect(scrollarea_->horizontalScrollBar(), SIGNAL(valueChanged(int)),
188 this, SLOT(h_scroll_value_changed(int)));
189 connect(scrollarea_->verticalScrollBar(), SIGNAL(valueChanged(int)),
190 this, SLOT(v_scroll_value_changed()));
192 connect(header_, SIGNAL(selection_changed()),
193 ruler_, SLOT(clear_selection()));
194 connect(ruler_, SIGNAL(selection_changed()),
195 header_, SLOT(clear_selection()));
197 connect(header_, SIGNAL(selection_changed()),
198 this, SIGNAL(selection_changed()));
199 connect(ruler_, SIGNAL(selection_changed()),
200 this, SIGNAL(selection_changed()));
202 connect(splitter_, SIGNAL(splitterMoved(int, int)),
203 this, SLOT(on_splitter_moved()));
205 connect(&lazy_event_handler_, SIGNAL(timeout()),
206 this, SLOT(process_sticky_events()));
207 lazy_event_handler_.setSingleShot(true);
209 // Set up local keyboard shortcuts
210 zoom_in_shortcut_ = new QShortcut(QKeySequence(Qt::Key_Plus), this,
211 SLOT(on_zoom_in_shortcut_triggered()), nullptr, Qt::WidgetWithChildrenShortcut);
212 zoom_in_shortcut_->setAutoRepeat(false);
214 zoom_out_shortcut_ = new QShortcut(QKeySequence(Qt::Key_Minus), this,
215 SLOT(on_zoom_out_shortcut_triggered()), nullptr, Qt::WidgetWithChildrenShortcut);
216 zoom_out_shortcut_->setAutoRepeat(false);
218 zoom_in_shortcut_2_ = new QShortcut(QKeySequence(Qt::Key_Up), this,
219 SLOT(on_zoom_in_shortcut_triggered()), nullptr, Qt::WidgetWithChildrenShortcut);
220 zoom_out_shortcut_2_ = new QShortcut(QKeySequence(Qt::Key_Down), this,
221 SLOT(on_zoom_out_shortcut_triggered()), nullptr, Qt::WidgetWithChildrenShortcut);
223 home_shortcut_ = new QShortcut(QKeySequence(Qt::Key_Home), this,
224 SLOT(on_scroll_to_start_shortcut_triggered()), nullptr, Qt::WidgetWithChildrenShortcut);
225 home_shortcut_->setAutoRepeat(false);
227 end_shortcut_ = new QShortcut(QKeySequence(Qt::Key_End), this,
228 SLOT(on_scroll_to_end_shortcut_triggered()), nullptr, Qt::WidgetWithChildrenShortcut);
229 end_shortcut_->setAutoRepeat(false);
231 // Trigger the initial event manually. The default device has signals
232 // which were created before this object came into being
235 // Make sure the transparent widgets are on the top
244 GlobalSettings::remove_change_handler(this);
247 void View::reset_view_state()
249 ViewBase::reset_view_state();
251 segment_display_mode_ = Trace::ShowLastSegmentOnly;
252 segment_selectable_ = false;
256 updating_scroll_ = false;
257 settings_restored_ = false;
258 always_zoom_to_fit_ = false;
260 tick_prefix_ = pv::util::SIPrefix::yocto;
262 time_unit_ = util::TimeUnit::Time;
263 show_cursors_ = false;
264 cursors_ = make_shared<CursorPair>(*this);
265 next_flag_text_ = 'A';
266 trigger_markers_.clear();
267 hover_widget_ = nullptr;
268 hover_point_ = QPoint(-1, -1);
269 scroll_needs_defaults_ = true;
271 scale_at_acq_start_ = 0;
272 offset_at_acq_start_ = 0;
273 suppress_zoom_to_fit_after_acq_ = false;
275 show_cursors_ = false;
276 cursor_state_changed(show_cursors_);
279 // Update the zoom state
280 calculate_tick_spacing();
282 // Make sure the standard bar's segment selector is in sync
283 set_segment_display_mode(segment_display_mode_);
286 Session& View::session()
291 const Session& View::session() const
296 unordered_set< shared_ptr<Signal> > View::signals() const
301 void View::clear_signals()
303 ViewBase::clear_signalbases();
307 void View::add_signal(const shared_ptr<Signal> signal)
309 ViewBase::add_signalbase(signal->base());
310 signals_.insert(signal);
312 signal->set_segment_display_mode(segment_display_mode_);
313 signal->set_current_segment(current_segment_);
315 connect(signal->base().get(), SIGNAL(name_changed(const QString&)),
316 this, SLOT(on_signal_name_changed()));
320 void View::clear_decode_signals()
322 decode_traces_.clear();
325 void View::add_decode_signal(shared_ptr<data::DecodeSignal> signal)
327 shared_ptr<DecodeTrace> d(
328 new DecodeTrace(session_, signal, decode_traces_.size()));
329 decode_traces_.push_back(d);
331 d->set_segment_display_mode(segment_display_mode_);
332 d->set_current_segment(current_segment_);
334 connect(signal.get(), SIGNAL(name_changed(const QString&)),
335 this, SLOT(on_signal_name_changed()));
338 void View::remove_decode_signal(shared_ptr<data::DecodeSignal> signal)
340 for (auto i = decode_traces_.begin(); i != decode_traces_.end(); i++)
341 if ((*i)->base() == signal) {
342 decode_traces_.erase(i);
349 shared_ptr<Signal> View::get_signal_under_mouse_cursor() const
351 return signal_under_mouse_cursor_;
359 const View* View::view() const
364 Viewport* View::viewport()
369 const Viewport* View::viewport() const
374 const Ruler* View::ruler() const
379 void View::save_settings(QSettings &settings) const
381 settings.setValue("scale", scale_);
382 settings.setValue("v_offset",
383 scrollarea_->verticalScrollBar()->sliderPosition());
385 settings.setValue("splitter_state", splitter_->saveState());
386 settings.setValue("segment_display_mode", segment_display_mode_);
390 boost::archive::text_oarchive oa(ss);
391 oa << boost::serialization::make_nvp("offset", offset_);
392 settings.setValue("offset", QString::fromStdString(ss.str()));
395 for (const shared_ptr<Signal>& signal : signals_) {
396 settings.beginGroup(signal->base()->internal_name());
397 signal->save_settings(settings);
402 void View::restore_settings(QSettings &settings)
404 // Note: It is assumed that this function is only called once,
405 // immediately after restoring a previous session.
407 if (settings.contains("scale"))
408 set_scale(settings.value("scale").toDouble());
410 if (settings.contains("offset")) {
411 util::Timestamp offset;
413 ss << settings.value("offset").toString().toStdString();
416 boost::archive::text_iarchive ia(ss);
417 ia >> boost::serialization::make_nvp("offset", offset);
418 // This also updates ruler_offset_
420 } catch (boost::archive::archive_exception&) {
421 qDebug() << "Could not restore the view offset";
425 if (settings.contains("splitter_state"))
426 splitter_->restoreState(settings.value("splitter_state").toByteArray());
428 if (settings.contains("segment_display_mode"))
429 set_segment_display_mode(
430 (Trace::SegmentDisplayMode)(settings.value("segment_display_mode").toInt()));
432 for (shared_ptr<Signal> signal : signals_) {
433 settings.beginGroup(signal->base()->internal_name());
434 signal->restore_settings(settings);
438 if (settings.contains("v_offset")) {
439 saved_v_offset_ = settings.value("v_offset").toInt();
440 set_v_offset(saved_v_offset_);
441 scroll_needs_defaults_ = false;
442 // Note: see eventFilter() for additional information
445 settings_restored_ = true;
446 suppress_zoom_to_fit_after_acq_ = true;
448 // Update the ruler so that it uses the new scale
449 calculate_tick_spacing();
452 vector< shared_ptr<TimeItem> > View::time_items() const
454 const vector<shared_ptr<Flag>> f(flags());
455 vector<shared_ptr<TimeItem>> items(f.begin(), f.end());
458 items.push_back(cursors_);
459 items.push_back(cursors_->first());
460 items.push_back(cursors_->second());
463 for (auto& trigger_marker : trigger_markers_)
464 items.push_back(trigger_marker);
469 double View::scale() const
474 void View::set_scale(double scale)
476 if (scale_ != scale) {
482 void View::set_offset(const pv::util::Timestamp& offset, bool force_update)
484 if ((offset_ != offset) || force_update) {
486 ruler_offset_ = offset_ + zero_offset_;
491 const Timestamp& View::offset() const
496 const Timestamp& View::ruler_offset() const
498 return ruler_offset_;
501 void View::set_zero_position(const pv::util::Timestamp& position)
503 zero_offset_ = -position;
505 // Force an immediate update of the offsets
506 set_offset(offset_, true);
510 void View::reset_zero_position()
514 // Force an immediate update of the offsets
515 set_offset(offset_, true);
519 pv::util::Timestamp View::zero_offset() const
524 int View::owner_visual_v_offset() const
526 return -scrollarea_->verticalScrollBar()->sliderPosition();
529 void View::set_v_offset(int offset)
531 scrollarea_->verticalScrollBar()->setSliderPosition(offset);
536 void View::set_h_offset(int offset)
538 scrollarea_->horizontalScrollBar()->setSliderPosition(offset);
543 int View::get_h_scrollbar_maximum() const
545 return scrollarea_->horizontalScrollBar()->maximum();
548 unsigned int View::depth() const
553 uint32_t View::current_segment() const
555 return current_segment_;
558 pv::util::SIPrefix View::tick_prefix() const
563 void View::set_tick_prefix(pv::util::SIPrefix tick_prefix)
565 if (tick_prefix_ != tick_prefix) {
566 tick_prefix_ = tick_prefix;
567 tick_prefix_changed();
571 unsigned int View::tick_precision() const
573 return tick_precision_;
576 void View::set_tick_precision(unsigned tick_precision)
578 if (tick_precision_ != tick_precision) {
579 tick_precision_ = tick_precision;
580 tick_precision_changed();
584 const pv::util::Timestamp& View::tick_period() const
589 unsigned int View::minor_tick_count() const
591 return minor_tick_count_;
594 void View::set_tick_period(const pv::util::Timestamp& tick_period)
596 if (tick_period_ != tick_period) {
597 tick_period_ = tick_period;
598 tick_period_changed();
602 TimeUnit View::time_unit() const
607 void View::set_time_unit(pv::util::TimeUnit time_unit)
609 if (time_unit_ != time_unit) {
610 time_unit_ = time_unit;
615 void View::set_current_segment(uint32_t segment_id)
617 current_segment_ = segment_id;
619 for (const shared_ptr<Signal>& signal : signals_)
620 signal->set_current_segment(current_segment_);
622 for (shared_ptr<DecodeTrace>& dt : decode_traces_)
623 dt->set_current_segment(current_segment_);
626 vector<util::Timestamp> triggers = session_.get_triggers(current_segment_);
628 trigger_markers_.clear();
629 for (util::Timestamp timestamp : triggers)
630 trigger_markers_.push_back(make_shared<TriggerMarker>(*this, timestamp));
632 // When enabled, the first trigger for this segment is used as the zero position
633 GlobalSettings settings;
634 bool trigger_is_zero_time = settings.value(GlobalSettings::Key_View_TriggerIsZeroTime).toBool();
636 if (trigger_is_zero_time && (triggers.size() > 0))
637 set_zero_position(triggers.front());
641 segment_changed(segment_id);
644 bool View::segment_is_selectable() const
646 return segment_selectable_;
649 Trace::SegmentDisplayMode View::segment_display_mode() const
651 return segment_display_mode_;
654 void View::set_segment_display_mode(Trace::SegmentDisplayMode mode)
656 segment_display_mode_ = mode;
658 for (const shared_ptr<Signal>& signal : signals_)
659 signal->set_segment_display_mode(mode);
661 uint32_t last_segment = session_.get_segment_count() - 1;
664 case Trace::ShowLastSegmentOnly:
665 if (current_segment_ != last_segment)
666 set_current_segment(last_segment);
669 case Trace::ShowLastCompleteSegmentOnly:
670 // Do nothing if we only have one segment so far
671 if (last_segment > 0) {
672 // If the last segment isn't complete, the previous one must be
673 uint32_t segment_id =
674 (session_.all_segments_complete(last_segment)) ?
675 last_segment : last_segment - 1;
677 if (current_segment_ != segment_id)
678 set_current_segment(segment_id);
682 case Trace::ShowSingleSegmentOnly:
683 case Trace::ShowAllSegments:
684 case Trace::ShowAccumulatedIntensity:
686 // Current segment remains as-is
690 segment_selectable_ = true;
692 if ((mode == Trace::ShowAllSegments) || (mode == Trace::ShowAccumulatedIntensity))
693 segment_selectable_ = false;
697 segment_display_mode_changed((int)mode, segment_selectable_);
700 void View::zoom(double steps)
702 zoom(steps, viewport_->width() / 2);
705 void View::zoom(double steps, int offset)
707 set_zoom(scale_ * pow(3.0 / 2.0, -steps), offset);
710 void View::zoom_fit(bool gui_state)
712 // Act as one-shot when stopped, toggle along with the GUI otherwise
713 if (session_.get_capture_state() == Session::Stopped) {
714 always_zoom_to_fit_ = false;
715 always_zoom_to_fit_changed(false);
717 always_zoom_to_fit_ = gui_state;
718 always_zoom_to_fit_changed(gui_state);
721 const pair<Timestamp, Timestamp> extents = get_time_extents();
722 const Timestamp delta = extents.second - extents.first;
723 if (delta < Timestamp("1e-12"))
727 const int w = viewport_->width();
731 const Timestamp scale = max(min(delta / w, MaxScale), MinScale);
732 set_scale_offset(scale.convert_to<double>(), extents.first);
735 void View::set_scale_offset(double scale, const Timestamp& offset)
737 // Disable sticky scrolling / always zoom to fit when acquisition runs
738 // and user drags the viewport
739 if ((scale_ == scale) && (offset_ != offset) &&
740 (session_.get_capture_state() == Session::Running)) {
742 if (sticky_scrolling_) {
743 sticky_scrolling_ = false;
744 sticky_scrolling_changed(false);
747 if (always_zoom_to_fit_) {
748 always_zoom_to_fit_ = false;
749 always_zoom_to_fit_changed(false);
756 calculate_tick_spacing();
763 set< shared_ptr<SignalData> > View::get_visible_data() const
765 // Make a set of all the visible data objects
766 set< shared_ptr<SignalData> > visible_data;
767 for (const shared_ptr<Signal>& sig : signals_)
769 visible_data.insert(sig->data());
774 pair<Timestamp, Timestamp> View::get_time_extents() const
776 boost::optional<Timestamp> left_time, right_time;
777 const set< shared_ptr<SignalData> > visible_data = get_visible_data();
778 for (const shared_ptr<SignalData>& d : visible_data) {
779 const vector< shared_ptr<Segment> > segments = d->segments();
780 for (const shared_ptr<Segment>& s : segments) {
781 double samplerate = s->samplerate();
782 samplerate = (samplerate <= 0.0) ? 1.0 : samplerate;
784 const Timestamp start_time = s->start_time();
785 left_time = left_time ?
786 min(*left_time, start_time) :
788 right_time = right_time ?
789 max(*right_time, start_time + d->max_sample_count() / samplerate) :
790 start_time + d->max_sample_count() / samplerate;
794 if (!left_time || !right_time)
795 return make_pair(0, 0);
797 assert(*left_time < *right_time);
798 return make_pair(*left_time, *right_time);
801 void View::enable_show_sampling_points(bool state)
808 void View::enable_show_analog_minor_grid(bool state)
815 void View::enable_colored_bg(bool state)
821 bool View::colored_bg() const
826 bool View::cursors_shown() const
828 return show_cursors_;
831 void View::show_cursors(bool show)
833 if (show_cursors_ != show) {
834 show_cursors_ = show;
836 cursor_state_changed(show);
842 void View::set_cursors(pv::util::Timestamp& first, pv::util::Timestamp& second)
846 cursors_->first()->set_time(first);
847 cursors_->second()->set_time(second);
853 void View::centre_cursors()
857 const double time_width = scale_ * viewport_->width();
858 cursors_->first()->set_time(offset_ + time_width * 0.4);
859 cursors_->second()->set_time(offset_ + time_width * 0.6);
865 shared_ptr<CursorPair> View::cursors() const
870 shared_ptr<Flag> View::add_flag(const Timestamp& time)
872 shared_ptr<Flag> flag =
873 make_shared<Flag>(*this, time, QString("%1").arg(next_flag_text_));
874 flags_.push_back(flag);
876 next_flag_text_ = (next_flag_text_ >= 'Z') ? 'A' :
877 (next_flag_text_ + 1);
879 time_item_appearance_changed(true, true);
883 void View::remove_flag(shared_ptr<Flag> flag)
886 time_item_appearance_changed(true, true);
889 vector< shared_ptr<Flag> > View::flags() const
891 vector< shared_ptr<Flag> > flags(flags_.begin(), flags_.end());
892 stable_sort(flags.begin(), flags.end(),
893 [](const shared_ptr<Flag> &a, const shared_ptr<Flag> &b) {
894 return a->time() < b->time();
900 const QPoint& View::hover_point() const
905 const QWidget* View::hover_widget() const
907 return hover_widget_;
910 int64_t View::get_nearest_level_change(const QPoint &p)
912 // Is snapping disabled?
913 if (snap_distance_ == 0)
917 entry_t(shared_ptr<Signal> s) :
918 signal(s), delta(numeric_limits<int64_t>::max()), sample(-1), is_dense(false) {}
919 shared_ptr<Signal> signal;
925 vector<entry_t> list;
927 // Create list of signals to consider
928 if (signal_under_mouse_cursor_)
929 list.emplace_back(signal_under_mouse_cursor_);
931 for (shared_ptr<Signal> s : signals_) {
935 list.emplace_back(s);
938 // Get data for listed signals
939 for (entry_t &e : list) {
940 // Calculate sample number from cursor position
941 const double samples_per_pixel = e.signal->base()->get_samplerate() * scale();
942 const int64_t x_offset = offset().convert_to<double>() / scale();
943 const int64_t sample_num = max(((x_offset + p.x()) * samples_per_pixel), 0.0);
945 vector<data::LogicSegment::EdgePair> edges =
946 e.signal->get_nearest_level_changes(sample_num);
952 const int64_t first_sample_delta = abs(sample_num - edges.front().first);
953 const int64_t first_delta = first_sample_delta / samples_per_pixel;
954 e.delta = first_delta;
955 e.sample = edges.front().first;
957 // Check second edge if available
958 if (edges.size() == 2) {
959 // Note: -1 because this is usually the right edge and sample points are left-aligned
960 const int64_t second_sample_delta = abs(sample_num - edges.back().first - 1);
961 const int64_t second_delta = second_sample_delta / samples_per_pixel;
963 // If both edges are too close, we mark this signal as being dense
964 if ((first_delta + second_delta) <= snap_distance_)
967 if (second_delta < first_delta) {
968 e.delta = second_delta;
969 e.sample = edges.back().first;
974 // Look for the best match: non-dense first, then dense
975 entry_t *match = nullptr;
977 for (entry_t &e : list) {
978 if (e.delta > snap_distance_ || e.is_dense)
982 if (e.delta < match->delta)
989 for (entry_t &e : list) {
994 if (e.delta < match->delta)
1002 // Somewhat ugly hack to make TimeItem::drag_by() work
1003 signal_under_mouse_cursor_ = match->signal;
1005 return match->sample;
1011 void View::restack_all_trace_tree_items()
1013 // Make a list of owners that is sorted from deepest first
1014 const vector<shared_ptr<TraceTreeItem>> items(
1015 list_by_type<TraceTreeItem>());
1016 set< TraceTreeItemOwner* > owners;
1017 for (const auto &r : items)
1018 owners.insert(r->owner());
1019 vector< TraceTreeItemOwner* > sorted_owners(owners.begin(), owners.end());
1020 sort(sorted_owners.begin(), sorted_owners.end(),
1021 [](const TraceTreeItemOwner* a, const TraceTreeItemOwner *b) {
1022 return a->depth() > b->depth(); });
1024 // Restack the items recursively
1025 for (auto &o : sorted_owners)
1028 // Animate the items to their destination
1029 for (const auto &i : items)
1030 i->animate_to_layout_v_offset();
1033 int View::header_width() const
1035 return header_->extended_size_hint().width();
1038 void View::on_setting_changed(const QString &key, const QVariant &value)
1040 if (key == GlobalSettings::Key_View_TriggerIsZeroTime)
1041 on_settingViewTriggerIsZeroTime_changed(value);
1043 if (key == GlobalSettings::Key_View_SnapDistance) {
1044 GlobalSettings settings;
1045 snap_distance_ = settings.value(GlobalSettings::Key_View_SnapDistance).toInt();
1049 void View::trigger_event(int segment_id, util::Timestamp location)
1051 // TODO This doesn't work if we're showing multiple segments at once
1052 if ((uint32_t)segment_id != current_segment_)
1055 // Set zero location if the Key_View_TriggerIsZeroTime setting is set and
1056 // if this is the first trigger for this segment.
1057 GlobalSettings settings;
1058 bool trigger_is_zero_time = settings.value(GlobalSettings::Key_View_TriggerIsZeroTime).toBool();
1060 size_t trigger_count = session_.get_triggers(current_segment_).size();
1062 if (trigger_is_zero_time && trigger_count == 1)
1063 set_zero_position(location);
1065 trigger_markers_.push_back(make_shared<TriggerMarker>(*this, location));
1068 void View::get_scroll_layout(double &length, Timestamp &offset) const
1070 const pair<Timestamp, Timestamp> extents = get_time_extents();
1071 length = ((extents.second - extents.first) / scale_).convert_to<double>();
1072 offset = offset_ / scale_;
1075 void View::set_zoom(double scale, int offset)
1077 // Reset the "always zoom to fit" feature as the user changed the zoom
1078 always_zoom_to_fit_ = false;
1079 always_zoom_to_fit_changed(false);
1081 const Timestamp cursor_offset = offset_ + scale_ * offset;
1082 const Timestamp new_scale = max(min(Timestamp(scale), MaxScale), MinScale);
1083 const Timestamp new_offset = cursor_offset - new_scale * offset;
1084 set_scale_offset(new_scale.convert_to<double>(), new_offset);
1087 void View::calculate_tick_spacing()
1089 const double SpacingIncrement = 10.0f;
1090 const double MinValueSpacing = 40.0f;
1092 // Figure out the highest numeric value visible on a label
1093 const QSize areaSize = viewport_->size();
1094 const Timestamp max_time = max(fabs(offset_),
1095 fabs(offset_ + scale_ * areaSize.width()));
1097 double min_width = SpacingIncrement;
1098 double label_width, tick_period_width;
1100 QFontMetrics m(QApplication::font());
1102 // Copies of the member variables with the same name, used in the calculation
1103 // and written back afterwards, so that we don't emit signals all the time
1104 // during the calculation.
1105 pv::util::Timestamp tick_period = tick_period_;
1106 pv::util::SIPrefix tick_prefix = tick_prefix_;
1107 unsigned tick_precision = tick_precision_;
1110 const double min_period = scale_ * min_width;
1112 const int order = (int)floorf(log10f(min_period));
1113 const pv::util::Timestamp order_decimal =
1114 pow(pv::util::Timestamp(10), order);
1116 // Allow for a margin of error so that a scale unit of 1 can be used.
1117 // Otherwise, for a SU of 1 the tick period will almost always be below
1118 // the min_period by a small amount - and thus skipped in favor of 2.
1119 // Note: margin assumes that SU[0] and SU[1] contain the smallest values
1120 double tp_margin = (ScaleUnits[0] + ScaleUnits[1]) / 2.0;
1121 double tp_with_margin;
1122 unsigned int unit = 0;
1125 tp_with_margin = order_decimal.convert_to<double>() *
1126 (ScaleUnits[unit++] + tp_margin);
1127 } while (tp_with_margin < min_period && unit < countof(ScaleUnits));
1129 minor_tick_count_ = (unit == 2) ? 4 : 5;
1130 tick_period = order_decimal * ScaleUnits[unit - 1];
1131 tick_prefix = static_cast<pv::util::SIPrefix>(
1132 (order - pv::util::exponent(pv::util::SIPrefix::yocto)) / 3);
1134 // Precision is the number of fractional digits required, not
1135 // taking the prefix into account (and it must never be negative)
1136 tick_precision = max(ceil(log10(1 / tick_period)).convert_to<int>(), 0);
1138 tick_period_width = (tick_period / scale_).convert_to<double>();
1140 const QString label_text = Ruler::format_time_with_distance(
1141 tick_period, max_time, tick_prefix, time_unit_, tick_precision);
1143 label_width = m.boundingRect(0, 0, INT_MAX, INT_MAX,
1144 Qt::AlignLeft | Qt::AlignTop, label_text).width() +
1147 min_width += SpacingIncrement;
1148 } while (tick_period_width < label_width);
1150 set_tick_period(tick_period);
1151 set_tick_prefix(tick_prefix);
1152 set_tick_precision(tick_precision);
1155 void View::adjust_top_margin()
1159 const QSize areaSize = viewport_->size();
1161 const pair<int, int> extents = v_extents();
1162 const int top_margin = owner_visual_v_offset() + extents.first;
1163 const int trace_bottom = owner_visual_v_offset() + extents.first + extents.second;
1165 // Do we have empty space at the top while the last trace goes out of screen?
1166 if ((top_margin > 0) && (trace_bottom > areaSize.height())) {
1167 const int trace_height = extents.second - extents.first;
1169 // Center everything vertically if there is enough space
1170 if (areaSize.height() >= trace_height)
1171 set_v_offset(extents.first -
1172 ((areaSize.height() - trace_height) / 2));
1174 // Remove the top margin to make as many traces fit on screen as possible
1175 set_v_offset(extents.first);
1179 void View::update_scroll()
1182 QScrollBar *hscrollbar = scrollarea_->horizontalScrollBar();
1183 QScrollBar *vscrollbar = scrollarea_->verticalScrollBar();
1185 const QSize areaSize = viewport_->size();
1187 // Set the horizontal scroll bar
1190 get_scroll_layout(length, offset);
1191 length = max(length - areaSize.width(), 0.0);
1193 int major_tick_distance = (tick_period_ / scale_).convert_to<int>();
1195 hscrollbar->setPageStep(areaSize.width() / 2);
1196 hscrollbar->setSingleStep(major_tick_distance);
1198 updating_scroll_ = true;
1200 if (length < MaxScrollValue) {
1201 hscrollbar->setRange(0, length);
1202 hscrollbar->setSliderPosition(offset.convert_to<double>());
1204 hscrollbar->setRange(0, MaxScrollValue);
1205 hscrollbar->setSliderPosition(
1206 (offset_ * MaxScrollValue / (scale_ * length)).convert_to<double>());
1209 updating_scroll_ = false;
1211 // Set the vertical scrollbar
1212 vscrollbar->setPageStep(areaSize.height());
1213 vscrollbar->setSingleStep(areaSize.height() / 8);
1215 const pair<int, int> extents = v_extents();
1217 // Don't change the scrollbar range if there are no traces
1218 if (extents.first != extents.second)
1219 vscrollbar->setRange(extents.first - areaSize.height(),
1222 if (scroll_needs_defaults_) {
1223 set_scroll_default();
1224 scroll_needs_defaults_ = false;
1228 void View::reset_scroll()
1230 scrollarea_->verticalScrollBar()->setRange(0, 0);
1233 void View::set_scroll_default()
1237 const QSize areaSize = viewport_->size();
1239 const pair<int, int> extents = v_extents();
1240 const int trace_height = extents.second - extents.first;
1242 // Do all traces fit in the view?
1243 if (areaSize.height() >= trace_height)
1244 // Center all traces vertically
1245 set_v_offset(extents.first -
1246 ((areaSize.height() - trace_height) / 2));
1248 // Put the first trace at the top, letting the bottom ones overflow
1249 set_v_offset(extents.first);
1252 void View::determine_if_header_was_shrunk()
1254 const int header_pane_width =
1255 splitter_->sizes().front(); // clazy:exclude=detaching-temporary
1257 // Allow for a slight margin of error so that we also accept
1258 // slight differences when e.g. a label name change increased
1259 // the overall width
1260 header_was_shrunk_ = (header_pane_width < (header_width() - 10));
1263 void View::resize_header_to_fit()
1265 // Setting the maximum width of the header widget doesn't work as
1266 // expected because the splitter would allow the user to make the
1267 // pane wider than that, creating empty space as a result.
1268 // To make this work, we stricly enforce the maximum width by
1269 // expanding the header unless the user shrunk it on purpose.
1270 // As we're then setting the width of the header pane, we set the
1271 // splitter to the maximum allowed position.
1273 int splitter_area_width = 0;
1274 for (int w : splitter_->sizes()) // clazy:exclude=range-loop
1275 splitter_area_width += w;
1277 // Make sure the header has enough horizontal space to show all labels fully
1278 QList<int> pane_sizes;
1279 pane_sizes.push_back(header_->extended_size_hint().width());
1280 pane_sizes.push_back(splitter_area_width - header_->extended_size_hint().width());
1281 splitter_->setSizes(pane_sizes);
1284 void View::update_layout()
1289 TraceTreeItemOwner* View::find_prevalent_trace_group(
1290 const shared_ptr<sigrok::ChannelGroup> &group,
1291 const unordered_map<shared_ptr<data::SignalBase>, shared_ptr<Signal> >
1296 unordered_set<TraceTreeItemOwner*> owners;
1297 vector<TraceTreeItemOwner*> owner_list;
1299 // Make a set and a list of all the owners
1300 for (const auto& channel : group->channels()) {
1301 for (auto& entry : signal_map) {
1302 if (entry.first->channel() == channel) {
1303 TraceTreeItemOwner *const o = (entry.second)->owner();
1304 owner_list.push_back(o);
1310 // Iterate through the list of owners, and find the most prevalent
1311 size_t max_prevalence = 0;
1312 TraceTreeItemOwner *prevalent_owner = nullptr;
1313 for (TraceTreeItemOwner *owner : owners) {
1314 const size_t prevalence = count_if(
1315 owner_list.begin(), owner_list.end(),
1316 [&](TraceTreeItemOwner *o) { return o == owner; });
1317 if (prevalence > max_prevalence) {
1318 max_prevalence = prevalence;
1319 prevalent_owner = owner;
1323 return prevalent_owner;
1326 vector< shared_ptr<Trace> > View::extract_new_traces_for_channels(
1327 const vector< shared_ptr<sigrok::Channel> > &channels,
1328 const unordered_map<shared_ptr<data::SignalBase>, shared_ptr<Signal> >
1330 set< shared_ptr<Trace> > &add_list)
1332 vector< shared_ptr<Trace> > filtered_traces;
1334 for (const auto& channel : channels) {
1335 for (auto& entry : signal_map) {
1336 if (entry.first->channel() == channel) {
1337 shared_ptr<Trace> trace = entry.second;
1338 const auto list_iter = add_list.find(trace);
1339 if (list_iter == add_list.end())
1342 filtered_traces.push_back(trace);
1343 add_list.erase(list_iter);
1348 return filtered_traces;
1351 void View::determine_time_unit()
1353 // Check whether we know the sample rate and hence can use time as the unit
1354 if (time_unit_ == util::TimeUnit::Samples) {
1355 // Check all signals but...
1356 for (const shared_ptr<Signal>& signal : signals_) {
1357 const shared_ptr<SignalData> data = signal->data();
1359 // ...only check first segment of each
1360 const vector< shared_ptr<Segment> > segments = data->segments();
1361 if (!segments.empty())
1362 if (segments[0]->samplerate()) {
1363 set_time_unit(util::TimeUnit::Time);
1370 bool View::eventFilter(QObject *object, QEvent *event)
1372 const QEvent::Type type = event->type();
1373 if (type == QEvent::MouseMove) {
1376 hover_widget_ = qobject_cast<QWidget*>(object);
1378 const QMouseEvent *const mouse_event = (QMouseEvent*)event;
1379 if (object == viewport_)
1380 hover_point_ = mouse_event->pos();
1381 else if (object == ruler_)
1382 hover_point_ = mouse_event->pos();
1383 else if (object == header_)
1384 hover_point_ = QPoint(0, mouse_event->y());
1386 hover_point_ = QPoint(-1, -1);
1388 update_hover_point();
1390 } else if (type == QEvent::Leave) {
1391 hover_point_ = QPoint(-1, -1);
1392 update_hover_point();
1393 } else if (type == QEvent::Show) {
1395 // This is somewhat of a hack, unfortunately. We cannot use
1396 // set_v_offset() from within restore_settings() as the view
1397 // at that point is neither visible nor properly sized.
1398 // This is the least intrusive workaround I could come up
1399 // with: set the vertical offset (or scroll defaults) when
1400 // the view is shown, which happens after all widgets were
1401 // resized to their final sizes.
1404 if (settings_restored_)
1405 determine_if_header_was_shrunk();
1407 resize_header_to_fit();
1409 if (scroll_needs_defaults_) {
1410 set_scroll_default();
1411 scroll_needs_defaults_ = false;
1414 if (saved_v_offset_) {
1415 set_v_offset(saved_v_offset_);
1416 saved_v_offset_ = 0;
1420 return QObject::eventFilter(object, event);
1423 void View::contextMenuEvent(QContextMenuEvent *event)
1425 QPoint pos = event->pos() - QPoint(0, ruler_->sizeHint().height());
1427 const shared_ptr<ViewItem> r = viewport_->get_mouse_over_item(pos);
1431 QMenu *menu = r->create_view_context_menu(this, pos);
1433 menu->popup(event->globalPos());
1436 void View::resizeEvent(QResizeEvent* event)
1438 // Only adjust the top margin if we shrunk vertically
1439 if (event->size().height() < event->oldSize().height())
1440 adjust_top_margin();
1445 void View::update_hover_point()
1447 // Determine signal that the mouse cursor is hovering over
1448 signal_under_mouse_cursor_.reset();
1449 if (hover_widget_ == this) {
1450 for (const shared_ptr<Signal>& s : signals_) {
1451 const pair<int, int> extents = s->v_extents();
1452 const int top = s->get_visual_y() + extents.first;
1453 const int btm = s->get_visual_y() + extents.second;
1454 if ((hover_point_.y() >= top) && (hover_point_.y() <= btm)
1455 && s->base()->enabled())
1456 signal_under_mouse_cursor_ = s;
1460 // Update all trace tree items
1461 const vector<shared_ptr<TraceTreeItem>> trace_tree_items(
1462 list_by_type<TraceTreeItem>());
1463 for (const shared_ptr<TraceTreeItem>& r : trace_tree_items)
1464 r->hover_point_changed(hover_point_);
1466 // Notify any other listeners
1467 hover_point_changed(hover_widget_, hover_point_);
1470 void View::row_item_appearance_changed(bool label, bool content)
1475 viewport_->update();
1478 void View::time_item_appearance_changed(bool label, bool content)
1483 // Make sure the header pane width is updated, too
1488 viewport_->update();
1491 void View::extents_changed(bool horz, bool vert)
1494 (horz ? TraceTreeItemHExtentsChanged : 0) |
1495 (vert ? TraceTreeItemVExtentsChanged : 0);
1497 lazy_event_handler_.stop();
1498 lazy_event_handler_.start();
1501 void View::on_signal_name_changed()
1503 if (!header_was_shrunk_)
1504 resize_header_to_fit();
1507 void View::on_splitter_moved()
1509 // The header can only shrink when the splitter is moved manually
1510 determine_if_header_was_shrunk();
1512 if (!header_was_shrunk_)
1513 resize_header_to_fit();
1516 void View::on_zoom_in_shortcut_triggered()
1521 void View::on_zoom_out_shortcut_triggered()
1526 void View::on_scroll_to_start_shortcut_triggered()
1531 void View::on_scroll_to_end_shortcut_triggered()
1533 set_h_offset(get_h_scrollbar_maximum());
1536 void View::h_scroll_value_changed(int value)
1538 if (updating_scroll_)
1541 // Disable sticky scrolling when user moves the horizontal scroll bar
1542 // during a running acquisition
1543 if (sticky_scrolling_ && (session_.get_capture_state() == Session::Running)) {
1544 sticky_scrolling_ = false;
1545 sticky_scrolling_changed(false);
1548 const int range = scrollarea_->horizontalScrollBar()->maximum();
1549 if (range < MaxScrollValue)
1550 set_offset(scale_ * value);
1554 get_scroll_layout(length, offset);
1555 set_offset(scale_ * length * value / MaxScrollValue);
1559 viewport_->update();
1562 void View::v_scroll_value_changed()
1565 viewport_->update();
1568 void View::signals_changed()
1570 using sigrok::Channel;
1572 vector< shared_ptr<Channel> > channels;
1573 shared_ptr<sigrok::Device> sr_dev;
1574 bool signals_added_or_removed = false;
1576 // Do we need to set the vertical scrollbar to its default position later?
1577 // We do if there are no traces, i.e. the scroll bar has no range set
1578 bool reset_scrollbar =
1579 (scrollarea_->verticalScrollBar()->minimum() ==
1580 scrollarea_->verticalScrollBar()->maximum());
1582 if (!session_.device()) {
1586 sr_dev = session_.device()->device();
1588 channels = sr_dev->channels();
1591 vector< shared_ptr<TraceTreeItem> > new_top_level_items;
1593 // Make a list of traces that are being added, and a list of traces
1594 // that are being removed
1595 const vector<shared_ptr<Trace>> prev_trace_list = list_by_type<Trace>();
1596 const set<shared_ptr<Trace>> prev_traces(
1597 prev_trace_list.begin(), prev_trace_list.end());
1599 set< shared_ptr<Trace> > traces(signals_.begin(), signals_.end());
1601 #ifdef ENABLE_DECODE
1602 traces.insert(decode_traces_.begin(), decode_traces_.end());
1605 set< shared_ptr<Trace> > add_traces;
1606 set_difference(traces.begin(), traces.end(),
1607 prev_traces.begin(), prev_traces.end(),
1608 inserter(add_traces, add_traces.begin()));
1610 set< shared_ptr<Trace> > remove_traces;
1611 set_difference(prev_traces.begin(), prev_traces.end(),
1612 traces.begin(), traces.end(),
1613 inserter(remove_traces, remove_traces.begin()));
1615 // Make a look-up table of sigrok Channels to pulseview Signals
1616 unordered_map<shared_ptr<data::SignalBase>, shared_ptr<Signal> >
1618 for (const shared_ptr<Signal>& sig : signals_)
1619 signal_map[sig->base()] = sig;
1621 // Populate channel groups
1623 for (auto& entry : sr_dev->channel_groups()) {
1624 const shared_ptr<sigrok::ChannelGroup> &group = entry.second;
1626 if (group->channels().size() <= 1)
1629 // Find best trace group to add to
1630 TraceTreeItemOwner *owner = find_prevalent_trace_group(
1633 // If there is no trace group, create one
1634 shared_ptr<TraceGroup> new_trace_group;
1636 new_trace_group.reset(new TraceGroup());
1637 owner = new_trace_group.get();
1640 // Extract traces for the trace group, removing them from
1642 const vector< shared_ptr<Trace> > new_traces_in_group =
1643 extract_new_traces_for_channels(group->channels(),
1644 signal_map, add_traces);
1646 // Add the traces to the group
1647 const pair<int, int> prev_v_extents = owner->v_extents();
1648 int offset = prev_v_extents.second - prev_v_extents.first;
1649 for (const shared_ptr<Trace>& trace : new_traces_in_group) {
1651 owner->add_child_item(trace);
1653 const pair<int, int> extents = trace->v_extents();
1654 if (trace->enabled())
1655 offset += -extents.first;
1656 trace->force_to_v_offset(offset);
1657 if (trace->enabled())
1658 offset += extents.second;
1661 if (new_trace_group) {
1662 // Assign proper vertical offsets to each channel in the group
1663 new_trace_group->restack_items();
1665 // If this is a new group, enqueue it in the new top level
1667 if (!new_traces_in_group.empty())
1668 new_top_level_items.push_back(new_trace_group);
1672 // Enqueue the remaining logic channels in a group
1673 vector< shared_ptr<Channel> > logic_channels;
1674 copy_if(channels.begin(), channels.end(), back_inserter(logic_channels),
1675 [](const shared_ptr<Channel>& c) {
1676 return c->type() == sigrok::ChannelType::LOGIC; });
1678 const vector< shared_ptr<Trace> > non_grouped_logic_signals =
1679 extract_new_traces_for_channels(logic_channels, signal_map, add_traces);
1681 if (non_grouped_logic_signals.size() > 0) {
1682 const shared_ptr<TraceGroup> non_grouped_trace_group(
1683 make_shared<TraceGroup>());
1684 for (const shared_ptr<Trace>& trace : non_grouped_logic_signals)
1685 non_grouped_trace_group->add_child_item(trace);
1687 non_grouped_trace_group->restack_items();
1688 new_top_level_items.push_back(non_grouped_trace_group);
1691 // Enqueue the remaining channels as free ungrouped traces
1692 const vector< shared_ptr<Trace> > new_top_level_signals =
1693 extract_new_traces_for_channels(channels, signal_map, add_traces);
1694 new_top_level_items.insert(new_top_level_items.end(),
1695 new_top_level_signals.begin(), new_top_level_signals.end());
1697 // Enqueue any remaining traces i.e. decode traces
1698 new_top_level_items.insert(new_top_level_items.end(),
1699 add_traces.begin(), add_traces.end());
1701 // Remove any removed traces
1702 for (const shared_ptr<Trace>& trace : remove_traces) {
1703 TraceTreeItemOwner *const owner = trace->owner();
1705 owner->remove_child_item(trace);
1706 signals_added_or_removed = true;
1709 // Remove any empty trace groups
1710 for (shared_ptr<TraceGroup> group : list_by_type<TraceGroup>())
1711 if (group->child_items().size() == 0) {
1712 remove_child_item(group);
1716 // Add and position the pending top levels items
1717 int offset = v_extents().second;
1718 for (auto item : new_top_level_items) {
1719 add_child_item(item);
1721 // Position the item after the last item or at the top if there is none
1722 const pair<int, int> extents = item->v_extents();
1724 if (item->enabled())
1725 offset += -extents.first;
1727 item->force_to_v_offset(offset);
1729 if (item->enabled())
1730 offset += extents.second;
1731 signals_added_or_removed = true;
1735 if (signals_added_or_removed && !header_was_shrunk_)
1736 resize_header_to_fit();
1741 viewport_->update();
1743 if (reset_scrollbar)
1744 set_scroll_default();
1747 void View::capture_state_updated(int state)
1749 GlobalSettings settings;
1751 if (state == Session::Running) {
1752 set_time_unit(util::TimeUnit::Samples);
1754 trigger_markers_.clear();
1755 set_zero_position(0);
1757 scale_at_acq_start_ = scale_;
1758 offset_at_acq_start_ = offset_;
1760 // Activate "always zoom to fit" if the setting is enabled and we're
1761 // the main view of this session (other trace views may be used for
1762 // zooming and we don't want to mess them up)
1763 bool state = settings.value(GlobalSettings::Key_View_ZoomToFitDuringAcq).toBool();
1764 if (is_main_view_ && state) {
1765 always_zoom_to_fit_ = true;
1766 always_zoom_to_fit_changed(always_zoom_to_fit_);
1769 // Enable sticky scrolling if the setting is enabled
1770 sticky_scrolling_ = settings.value(GlobalSettings::Key_View_StickyScrolling).toBool();
1772 // Reset all traces to segment 0
1773 current_segment_ = 0;
1774 set_current_segment(current_segment_);
1777 if (state == Session::Stopped) {
1778 // After acquisition has stopped we need to re-calculate the ticks once
1779 // as it's otherwise done when the user pans or zooms, which is too late
1780 calculate_tick_spacing();
1782 // Reset "always zoom to fit", the acquisition has stopped
1783 if (always_zoom_to_fit_) {
1784 // Perform a final zoom-to-fit before disabling
1785 zoom_fit(always_zoom_to_fit_);
1786 always_zoom_to_fit_ = false;
1787 always_zoom_to_fit_changed(always_zoom_to_fit_);
1790 bool zoom_to_fit_after_acq =
1791 settings.value(GlobalSettings::Key_View_ZoomToFitAfterAcq).toBool();
1793 // Only perform zoom-to-fit if the user hasn't altered the viewport and
1794 // we didn't restore settings in the meanwhile
1795 if (zoom_to_fit_after_acq &&
1796 !suppress_zoom_to_fit_after_acq_ &&
1797 (scale_ == scale_at_acq_start_) &&
1798 (offset_ == offset_at_acq_start_))
1799 zoom_fit(false); // We're stopped, so the GUI state doesn't matter
1801 suppress_zoom_to_fit_after_acq_ = false;
1805 void View::on_new_segment(int new_segment_id)
1807 on_segment_changed(new_segment_id);
1810 void View::on_segment_completed(int segment_id)
1812 on_segment_changed(segment_id);
1815 void View::on_segment_changed(int segment)
1817 switch (segment_display_mode_) {
1818 case Trace::ShowLastSegmentOnly:
1819 case Trace::ShowSingleSegmentOnly:
1820 set_current_segment(segment);
1823 case Trace::ShowLastCompleteSegmentOnly:
1824 // Only update if all segments are complete
1825 if (session_.all_segments_complete(segment))
1826 set_current_segment(segment);
1829 case Trace::ShowAllSegments:
1830 case Trace::ShowAccumulatedIntensity:
1836 void View::on_settingViewTriggerIsZeroTime_changed(const QVariant new_value)
1838 if (new_value.toBool()) {
1839 // The first trigger for this segment is used as the zero position
1840 vector<util::Timestamp> triggers = session_.get_triggers(current_segment_);
1841 if (triggers.size() > 0)
1842 set_zero_position(triggers.front());
1844 reset_zero_position();
1847 void View::perform_delayed_view_update()
1849 if (always_zoom_to_fit_) {
1851 } else if (sticky_scrolling_) {
1852 // Make right side of the view sticky
1855 get_scroll_layout(length, offset);
1857 const QSize areaSize = viewport_->size();
1858 length = max(length - areaSize.width(), 0.0);
1860 set_offset(scale_ * length);
1863 determine_time_unit();
1866 viewport_->update();
1869 void View::process_sticky_events()
1871 if (sticky_events_ & TraceTreeItemHExtentsChanged)
1873 if (sticky_events_ & TraceTreeItemVExtentsChanged) {
1874 restack_all_trace_tree_items();
1878 // Clear the sticky events
1882 } // namespace trace
1883 } // namespace views