Implement LogicSegment::get_surrounding_edges() and use it

[pulseview.git] / pv / views / trace / logicsignal.cpp

diff --git a/pv/views/trace/logicsignal.cpp b/pv/views/trace/logicsignal.cpp
index 8396323f4ee05623c3e49d747ef9b44caf47cc15..438e4e21c1f6a6c639543897cb65f35362e9a746 100644 (file)
--- a/pv/views/trace/logicsignal.cpp
+++ b/pv/views/trace/logicsignal.cpp
@@ -320,6 +320,51 @@ void LogicSignal::paint_fore(QPainter &p, ViewItemPaintParams &pp)
        }
 }
 
+void LogicSignal::hover_point_changed(const QPoint &hp)
+{
+       Signal::hover_point_changed(hp);
+
+       assert(base_);
+       assert(owner_);
+
+       if ((!base_->enabled()) || (hp.x() == 0))
+               return;
+
+       // Ignore if mouse cursor is not hovering over this trace
+       const int y = get_visual_y();
+       const pair<int, int> extents = v_extents();
+       if ((hp.y() < (y + extents.first)) || ((hp.y() > (y + extents.second))))
+               return;
+
+       shared_ptr<pv::data::LogicSegment> segment = get_logic_segment_to_paint();
+       if (!segment || (segment->get_sample_count() == 0))
+               return;
+
+       double samplerate = segment->samplerate();
+
+       // Show sample rate as 1Hz when it is unknown
+       if (samplerate == 0.0)
+               samplerate = 1.0;
+
+       const View *view = owner_->view();
+       assert(view);
+       const double scale = view->scale();
+       const double pixels_offset =
+               ((view->offset() - segment->start_time()) / scale).convert_to<double>();
+       const double samples_per_pixel = samplerate * scale;
+
+       const uint64_t sample_pos = (uint64_t)max(
+               (hp.x() + pixels_offset) * samples_per_pixel, 0.0);
+
+       vector<data::LogicSegment::EdgePair> edges;
+
+       segment->get_surrounding_edges(edges, sample_pos,
+               samples_per_pixel / Oversampling, base_->index());
+
+       if (edges.empty())
+               return;
+}
+
 void LogicSignal::paint_caps(QPainter &p, QLineF *const lines,
        vector< pair<int64_t, bool> > &edges, bool level,
        double samples_per_pixel, double pixels_offset, float x_offset,