refs #22915 add json peak data loading & peak data

scripts/Muon/GUI/ElementalAnalysis/PeriodicTable/periodic_table_model.py

+from __future__ import print_function, absolute_import
+
+import mantid.simpleapi as mantid
+
+import os
+import json
+
+from Muon.GUI.Common import message_box
+from Muon.GUI import ElementalAnalysis
+
+
+class PeriodicTableModel(object):
+    def __init__(self):
+        self._peak_data = {}
+        self._peak_data_file = os.path.join(os.path.dirname(ElementalAnalysis.__file__), "peak_data.json")   
+        self.load_peak_data()  
+
+    def load_peak_data(self):
+        # using os.path.isfile allows file modifications to take place before opening:
+        # we don't want this.
+        try:
+            with open(self._peak_data_file, "r") as f:
+                try:
+                    self.peak_data = json.load(f)
+                except ValueError as error:
+                    message_box.warning(error)
+        except IOError as error:
+            message_box.warning(error)
+
+    @property
+    def peak_data(self):
+        return self._peak_data
+
+    @peak_data.setter
+    def peak_data(self, peak_data):
+        self._peak_data = peak_data
+        # leaves room for change event etc.?
+
+    @property
+    def peak_data_file(self):
+        return self._peak_data_file
+
+    @peak_data_file.setter
+    def peak_data_file(self, filepath):
+        self._peak_data_file = filepath
+        self.load_peak_data()
\ No newline at end of file

scripts/Muon/GUI/ElementalAnalysis/PeriodicTable/periodic_table_presenter.py

 class PeriodicTablePresenter(object):
-    def __init__(self, view):
+    def __init__(self, view, model):
         self.view = view
+        self.model = model
 
     @property
     def widget(self):

scripts/Muon/GUI/ElementalAnalysis/PeriodicTable/periodic_table_widget.py

@@ -2,6 +2,7 @@ from __future__ import absolute_import
 
 from Muon.GUI.ElementalAnalysis.PeriodicTable.periodic_table_view import PeriodicTableView
 from Muon.GUI.ElementalAnalysis.PeriodicTable.periodic_table_presenter import PeriodicTablePresenter
+from Muon.GUI.ElementalAnalysis.PeriodicTable.periodic_table_model import PeriodicTableModel
 
 from PyQt4 import QtGui
 
@@ -10,7 +11,8 @@ class PeriodicTable(QtGui.QWidget):
     def __init__(self, parent=None):
         super(PeriodicTable, self).__init__(parent)
         view = PeriodicTableView(parent)
-        self._presenter = PeriodicTablePresenter(view)
+        model = PeriodicTableModel()
+        self._presenter = PeriodicTablePresenter(view, model)
 
     @property
     def presenter(self):