+ QSize sizeHint() const;
+
+ /**
+ * The horizontal offset, relative to the left edge of the widget,
+ * where the arrows of the trace labels end.
+ */
+ static const int BaselineOffset;
+
+private:
+ std::shared_ptr<pv::view::Trace> get_mouse_over_trace(
+ const QPoint &pt);
+
+ void clear_selection();
+