changing default order of hdf works with node names and displays correct label (#310)

Fix problem with incorrect selection of label and group of HDF files when using not default order

Co-authored-by: Dominik Demuth <dominik.demuth@physik.tu-darmstadt.de>
Reviewed-on: #310

src/nmreval/io/hdfreader.py

@@ -302,15 +302,26 @@ class HdfReader(HdfNode):
 
     def make_signal(self, node, flag: str = 'fid', value: str = None, group: str = None):
         if value is None:
+            data_name = node.name
             value = self._get_parameter_values(node, node.parameter)
         else:
             try:
+                data_name = f"{value}={node.parameter[value]}"
                 value = node.parameter[value]
             except KeyError:
+                print(node.title_parameter)
                 try:
-                    value = node.title_parameter[1][value]
+                    temp = node
+                    while value != temp.title_parameter[0][0]:
+                        if temp.parent is None:
+                            break
+                        temp = temp.parent
+
+                    value = temp.title_parameter[0][1]
+                    data_name = temp.name
                 except KeyError:
                     print(f'{value} is not a valid key for {node.name}')
+                    data_name = node.name
                     value = None
 
         if group is None:
@@ -343,11 +354,11 @@ class HdfReader(HdfNode):
         dw = float(index['dwelltime'])
         if flag == 'fid':
             x = np.arange(len(y)) * dw
-            ret = FID(x, y, name=node.name, value=value, group=group, filename=self.file.filename)
+            ret = FID(x, y, name=data_name, value=value, group=group, filename=self.file.filename)
 
         elif flag == 'spectrum':
             x = np.linspace(-1/dw, 1/dw, num=len(y))
-            ret = Spectrum(x, y, name=node.name, value=value, group=group, filename=self.file.filename)
+            ret = Spectrum(x, y, name=data_name, value=value, group=group, filename=self.file.filename)
         else:
             raise ValueError(f'{flag} unknown, use `fid` or `spectrum`.')