[Kst] branches/work/kst/portto4/kst/src/datasources/netcdf

[Nicolas Brisset]

SVN commit 1198560 by brisset:

Add support for vector scalars and strings for netCDF. I can see scalars in the View->Scalars dialog and strings in the debugger 
as well as in labels. We only need to upgrade a bit the View->Strings dialog and do the same for other primitives (matrices, 
...) and it will start looking real good for that data source :-)
I am also wondering whether I have to explicitly delete the *att and *var objects created in those functions, or if they get 
cleared as soon as we leave the scope. Please check because that would mean a memleak (I haven't done it for now).


 M  +40 -2     kstnetcdf.cpp  


--- branches/work/kst/portto4/kst/src/datasources/netcdf/kstnetcdf.cpp #1198559:1198560
@@ -147,8 +147,8 @@
   void setDataInfo(const QString&, const DataVector::DataInfo&) {}
 
   // meta data
-  QMap<QString, double> metaScalars(const QString&) { return QMap<QString, double>(); }
-  QMap<QString, QString> metaStrings(const QString&) { return QMap<QString, QString>(); }
+  QMap<QString, double> metaScalars(const QString&);
+  QMap<QString, QString> metaStrings(const QString&);
 
 
 private:
@@ -177,7 +177,45 @@
   return  netcdf._fieldList.contains( field );
 }
 
+QMap<QString, double> DataInterfaceNetCdfVector::metaScalars(const QString& field)
+{
+  QMap<QString, double> fieldScalars;
+  NcVar *var = netcdf._ncfile->get_var(field.toLatin1().constData());
+  fieldScalars["NbAttributes"] = var->num_atts();
+  for (int i=0; i<var->num_atts(); ++i) {
+    NcAtt *att = var->get_att(i);
+    // Only handle char attributes as fieldStrings, the others as fieldScalars
+    if (att->type() == NC_BYTE || att->type() == NC_SHORT || att->type() == NC_INT
+        || att->type() == NC_LONG || att->type() == NC_FLOAT || att->type() == NC_DOUBLE) {
+      // Some attributes may have multiple values => load the first as is, and for the others
+      // add a -2, -3, etc... suffix as obviously we can have only one value per scalar.
+      // Do it in two steps to avoid a test in the loop while keeping a "clean" name for the first one
+      fieldScalars[QString(att->name())] = att->values()->as_double(0);
+      for (int j=1; j<att->values()->num(); ++j) {
+        fieldScalars[QString(att->name()) + QString("-") + QString::number(j+1)] = att->values()->as_double(j);
+      }
+    }
+  }
+  return fieldScalars;
+}
 
+QMap<QString, QString> DataInterfaceNetCdfVector::metaStrings(const QString& field)
+{
+  QMap<QString, QString> fieldStrings;
+  QString tmpString;
+  NcVar *var = netcdf._ncfile->get_var(field.toLatin1().constData());
+  for (int i=0; i<var->num_atts(); ++i) {
+    NcAtt *att = var->get_att(i);
+    // Only handle char/unspecified attributes as fieldStrings, the others as fieldScalars
+    if (att->type() == NC_CHAR || att->type() == NC_UNSPECIFIED) {
+      fieldStrings[att->name()] = QString(att->values()->as_string(0));
+    }
+    // qDebug() << att->name() << ": " << att->values()->num() << endl;
+  }
+  return fieldStrings;
+}
+
+
 //
 // Matrix interface
 //