- using pv::data::SignalData;
-
- const vector< shared_ptr<Signal> > sigs(
- session().get_signals());
-
- // Make a set of all the visible data objects
- set< shared_ptr<SignalData> > visible_data;
- BOOST_FOREACH(const shared_ptr<Signal> sig, sigs)
- if (sig->enabled())
- visible_data.insert(sig->data());
-
- if (visible_data.empty())
- return;
-
- double left_time = DBL_MAX, right_time = DBL_MIN;
- BOOST_FOREACH(const shared_ptr<SignalData> d, visible_data)
- {
- const double start_time = d->get_start_time();
- left_time = min(left_time, start_time);
- right_time = max(right_time, start_time +
- d->get_max_sample_count() / d->samplerate());
- }
-
- assert(left_time < right_time);
- if (right_time - left_time < 1e-12)
+ const pair<double, double> extents = get_time_extents();
+ const double delta = extents.second - extents.first;
+ if (delta < 1e-12)