X-Git-Url: http://git.code-monkey.de/?p=pulseview.git;a=blobdiff_plain;f=pv%2Fviews%2Ftrace%2Fsignal.hpp;h=1b9f254330a79fd150f6f73165f5cb910a76b5be;hp=1c53d8b2260a960669261c056f069a9e35883bfb;hb=eeceee9955e7db4ac777d49d1b7a766069476b08;hpb=b4bc9b55381ff22196785291d3862c8c8c131885

diff --git a/pv/views/trace/signal.hpp b/pv/views/trace/signal.hpp
index 1c53d8b..1b9f254 100644
--- a/pv/views/trace/signal.hpp
+++ b/pv/views/trace/signal.hpp
@@ -27,6 +27,8 @@
 
 #include <cstdint>
 
+#include <pv/data/logicsegment.hpp>
+
 #include "trace.hpp"
 #include "viewitemowner.hpp"
 
@@ -68,6 +70,15 @@ public:
 
 	virtual shared_ptr<pv::data::SignalData> data() const = 0;
 
+	/**
+	 * Determines the closest level change (i.e. edge) to a given sample, which
+	 * is useful for e.g. the "snap to edge" functionality.
+	 *
+	 * @param sample_pos Sample to use
+	 * @return The changes left and right of the given position
+	 */
+	virtual vector<data::LogicSegment::EdgePair> get_nearest_level_changes(uint64_t sample_pos) = 0;
+
 	/**
 	 * Returns true if the trace is visible and enabled.
 	 */