Add data monitor and ValueError and update on filesource

Adding new class R3BDataMonitor for easy histogram operations in
FairTask. New class ValueError can be used to represent values with
errors. R3BFileSource2 now can handle root files just with root tree
inside. Documentation of these new classes and changes have been added
to the README.md in the r3bbase folder.

r3bbase/BaseLinkDef.h

@@ -31,4 +31,8 @@
 #pragma link C++ class R3BTcutPar+;
 #pragma link C++ class R3BTsplinePar+;
 #pragma link C++ class R3BCoarseTimeStitch+;
+#pragma link C++ class R3B::ValueError<double>+;
+#pragma link C++ class pair<R3B::ValueError<double>, R3B::ValueError<double>>+;
+#pragma link C++ class R3B::LRPair<R3B::ValueError<double>>+;
+#pragma link C++ class R3B::LRPair<int>+;
 #endif

r3bbase/CMakeLists.txt

@@ -12,6 +12,9 @@
 ##############################################################################
 
 set(SRCS
+    # cmake-format: sortable
+    data_monitor/R3BDataMonitor.cxx
+    data_monitor/R3BDataMonitorCanvas.cxx
     R3BCoarseTimeStitch.cxx
     R3BDataPropagator.cxx
     R3BDetector.cxx
@@ -27,6 +30,9 @@ set(SRCS
     R3BWhiterabbitPropagator.cxx)
 
 set(HEADERS
+    # cmake-format: sortable
+    data_monitor/R3BDataMonitor.h
+    data_monitor/R3BDataMonitorCanvas.h
     R3BCoarseTimeStitch.h
     R3BDataPropagator.h
     R3BDetector.h
@@ -55,6 +61,7 @@ add_library_with_dictionary(
     SRCS
     ${SRCS}
     INCLUDEDIRS
+    data_monitor
     ${CMAKE_CURRENT_SOURCE_DIR}
     DEPENDENCIES
     ${DEPENDENCIES})

r3bbase/R3BEventHeaderPropagator.cxx

@@ -11,7 +11,6 @@
  * or submit itself to any jurisdiction.                                      *
  ******************************************************************************/
 
-#include "FairLogger.h"
 #include <FairRootManager.h>
 
 #include "R3BEventHeaderPropagator.h"
@@ -23,22 +22,12 @@ R3BEventHeaderPropagator::R3BEventHeaderPropagator()
 {
 }
 
-R3BEventHeaderPropagator::R3BEventHeaderPropagator(const TString& name, Int_t iVerbose, const TString& nameheader)
+R3BEventHeaderPropagator::R3BEventHeaderPropagator(const TString& name, Int_t iVerbose, std::string_view nameheader)
     : FairTask(name, iVerbose)
     , fNameHeader(nameheader)
-    , fHeader(nullptr)
-    , fSource(nullptr)
 {
 }
 
-R3BEventHeaderPropagator::~R3BEventHeaderPropagator()
-{
-    if (fHeader)
-    {
-        delete fHeader;
-    }
-}
-
 InitStatus R3BEventHeaderPropagator::Init()
 {
     R3BLOG(info, "");
@@ -47,21 +36,20 @@ InitStatus R3BEventHeaderPropagator::Init()
     R3BLOG_IF(fatal, !fHeader, "EventHeader. not found.");
     R3BLOG_IF(info, fHeader, "EventHeader. found.");
 
-    frm->Register(fNameHeader, "EventHeader", fHeader, kTRUE);
+    frm->Register(fNameHeader.data(), "EventHeader", fHeader, kTRUE);
 
-    fSource = R3BFileSource::Instance();
+    fSource = frm->GetSource();
     R3BLOG_IF(fatal, !fSource, "R3BFileSource not found.");
 
     return kSUCCESS;
 }
 
-void R3BEventHeaderPropagator::Exec(Option_t*)
+void R3BEventHeaderPropagator::Exec(Option_t* /*option*/)
 {
-    if (fSource)
+    if (fSource != nullptr)
     {
         fHeader->SetRunId(fSource->GetRunId());
     }
-    return;
 }
 
 ClassImp(R3BEventHeaderPropagator);

r3bbase/R3BEventHeaderPropagator.h

@@ -18,7 +18,7 @@
 #include <Rtypes.h>
 
 #include "R3BEventHeader.h"
-class R3BFileSource;
+class FairSource;
 
 class R3BEventHeaderPropagator : public FairTask
 {
@@ -35,13 +35,9 @@ class R3BEventHeaderPropagator : public FairTask
      * @param name a name of the task.
      * @param iVerbose a verbosity level.
      */
-    R3BEventHeaderPropagator(const TString& name, Int_t iVerbose = 1, const TString& nameheader = "EventHeader.");
-
-    /**
-     * Destructor.
-     * Frees the memory used by the object.
-     */
-    ~R3BEventHeaderPropagator() override;
+    explicit R3BEventHeaderPropagator(const TString& name,
+                                      Int_t iVerbose = 1,
+                                      std::string_view nameheader = "EventHeader.");
 
     /**
      * Method for task initialization.
@@ -56,15 +52,15 @@ class R3BEventHeaderPropagator : public FairTask
      * Is called by the framework every time a new event is read.
      * @param option an execution option.
      */
-    void Exec(Option_t*) override;
+    void Exec(Option_t* /*option*/) override;
 
   private:
-    TString fNameHeader;
-    R3BEventHeader* fHeader;
-    R3BFileSource* fSource;
+    std::string fNameHeader;
+    R3BEventHeader* fHeader = nullptr;
+    FairSource* fSource = nullptr;
 
   public:
-    ClassDefOverride(R3BEventHeaderPropagator, 0)
+    ClassDefOverride(R3BEventHeaderPropagator, 1)
 };
 
 #endif // R3BEVENTHEADERPROPAGATOR_H