View: Determine time unit and use it in other classes

[pulseview.git] / pv / view / view.cpp

diff --git a/pv/view/view.cpp b/pv/view/view.cpp
index 1aa7b7292da842b660865c821d6a884b929c18c9..42b22258dd59d2b0079ef6e1246b9382832e1166 100644 (file)
--- a/pv/view/view.cpp
+++ b/pv/view/view.cpp
@@ -61,6 +61,7 @@ using boost::shared_mutex;
 using pv::data::SignalData;
 using pv::data::Segment;
 using pv::util::format_time;
+using pv::util::TimeUnit;
 
 using std::deque;
 using std::dynamic_pointer_cast;
@@ -103,6 +104,7 @@ View::View(Session &session, QWidget *parent) :
        always_zoom_to_fit_(false),
        tick_period_(0.0),
        tick_prefix_(0),
+       time_unit_(util::Time),
        show_cursors_(false),
        cursors_(new CursorPair(*this)),
        next_flag_text_('A'),
@@ -239,6 +241,11 @@ double View::tick_period() const
        return tick_period_;
 }
 
+TimeUnit View::time_unit() const
+{
+       return time_unit_;
+}
+
 void View::zoom(double steps)
 {
        zoom(steps, viewport_->width() / 2);
@@ -504,7 +511,7 @@ void View::calculate_tick_spacing()
 
                typical_width = m.boundingRect(0, 0, INT_MAX, INT_MAX,
                        Qt::AlignLeft | Qt::AlignTop,
-                       format_time(offset_, tick_prefix_)).width() +
+                       format_time(offset_, tick_prefix_, time_unit_)).width() +
                                MinValueSpacing;
 
                min_width += SpacingIncrement;
@@ -638,6 +645,27 @@ vector< shared_ptr<Trace> > View::extract_new_traces_for_channels(
        return filtered_traces;
 }
 
+void View::determine_time_unit()
+{
+       time_unit_ = util::Samples;
+
+       shared_lock<shared_mutex> lock(session().signals_mutex());
+       const unordered_set< shared_ptr<Signal> > &sigs(session().signals());
+
+       // Check all signals but...
+       for (const shared_ptr<Signal> signal : sigs) {
+               const shared_ptr<SignalData> data = signal->data();
+
+               // ...only check first segment of each
+               const vector< shared_ptr<Segment> > segments = data->segments();
+               if (!segments.empty())
+                       if (segments[0]->samplerate()) {
+                               time_unit_ = util::Time;
+                               break;
+                       }
+       }
+}
+
 bool View::eventFilter(QObject *object, QEvent *event)
 {
        const QEvent::Type type = event->type();
@@ -880,6 +908,7 @@ void View::data_updated()
                if (!delayed_view_updater_.isActive())
                        delayed_view_updater_.start();
        } else {
+               determine_time_unit();
                update_scroll();
                ruler_->update();
                viewport_->update();
@@ -902,6 +931,7 @@ void View::perform_delayed_view_update()
                offset_ = scale_ * length;
        }
 
+       determine_time_unit();
        update_scroll();
        ruler_->update();
        viewport_->update();