From c894c21bf3f37671b6f6ccefbbe952c6839273c9 Mon Sep 17 00:00:00 2001
From: Andreas Suter <andreas.suter@psi.ch>
Date: Mon, 2 Feb 2026 08:02:41 +0100
Subject: [PATCH] add more HDF4 header info.

---
 src/classes/PRunDataHandler.cpp | 42 +++++++++++++++++++++++++++++++++
 1 file changed, 42 insertions(+)

diff --git a/src/classes/PRunDataHandler.cpp b/src/classes/PRunDataHandler.cpp
index 52db5954..212849b3 100644
--- a/src/classes/PRunDataHandler.cpp
+++ b/src/classes/PRunDataHandler.cpp
@@ -2307,6 +2307,48 @@ Bool_t PRunDataHandler::ReadNexusFile()
     if (nxs_file->HasDataset("/run/sample/name"))
       sstr = nxs_file->GetDataset<std::string>("/run/sample/name").GetData()[0];
     runData.SetSample(sstr);
+
+    // get/set orientation
+    runData.SetOrientation("??");
+
+    // get/set time resolution (ns)
+    dval = PMUSR_UNDEFINED;
+    sstr = "n/a";
+    factor = 1.0;
+    if (nxs_file->HasDataset("/run/histogram_data_1/resolution")) {
+      auto res_ds = nxs_file->GetDataset<int>("/run/histogram_data_1/resolution");
+      dval = res_ds.GetData()[0];
+      if (res_ds.HasAttribute("units"))
+        sstr = std::any_cast<std::string>(res_ds.GetAttribute("units"));
+      if ((sstr == "picoseconds") || (sstr == "pico.seconds"))
+        factor = 1.0e-3; // ps -> ns
+    }
+    runData.SetTimeResolution(dval*factor);
+
+    // get/set start/stop time
+    sstr = "n/a";
+    TString date{"n/a"}, time{"n/a"};
+    if (nxs_file->HasDataset("/run/start_time"))
+      sstr = nxs_file->GetDataset<std::string>("/run/start_time").GetData()[0];
+    str = sstr;
+    SplitTimeDate(str, time, date, ok);
+    if (ok) {
+      runData.SetStartTime(time);
+      runData.SetStartDate(date);
+    }
+
+    sstr = "n/a";
+    date = "n/a";
+    time = "n/a";
+    if (nxs_file->HasDataset("/run/stop_time"))
+      sstr = nxs_file->GetDataset<std::string>("/run/stop_time").GetData()[0];
+    str = sstr;
+    SplitTimeDate(str, time, date, ok);
+    if (ok) {
+      runData.SetStopTime(time);
+      runData.SetStopDate(date);
+    }
+
 #endif
   } else { // HDF5
     std::unique_ptr<nxH5::PNeXus> nxs_file = std::make_unique<nxH5::PNeXus>(fRunPathName.Data());