Added settings dialog

mt5_correlation/config.py

@@ -7,25 +7,18 @@ class Config(object):
     Provides access to application configuration parameters stored in config.yaml.
     """
 
-    _config = None
-    _path = None
-    _instance = None
+    config_filepath = None
+    __config = None
+    __instance = None
 
-    def __init__(self):
-        """
-        Singleton. Raise runtime error
-        """
-        raise RuntimeError('Call instance() instead')
-
-    @classmethod
-    def instance(cls):
+    def __new__(cls):
         """
         Singleton. Get instance of this class. Create if not already created.
         :return:
         """
-        if cls._instance is None:
-            cls._instance = cls.__new__(cls)
-        return cls._instance
+        if cls.__instance is None:
+            cls.__instance = super(Config, cls).__new__(cls)
+        return cls.__instance
 
     def load(self, path):
         """
@@ -34,10 +27,10 @@ class Config(object):
         :return:
         """
         with open(path, 'r') as yamlfile:
-            self._config = yaml.safe_load(yamlfile)
+            self.__config = yaml.safe_load(yamlfile)
 
         # Store path so that we can save later
-        self._path = path
+        self.config_filepath = path
 
     def save(self):
         """
@@ -45,9 +38,9 @@ class Config(object):
         :return:
         """
 
-        with open(self._path, 'w') as file:
+        with open(self.config_filepath, 'w') as file:
             file.write("---\n")
-            yaml.dump(self._config, file, sort_keys=False)
+            yaml.dump(self.__config, file, sort_keys=False)
             file.write("...")
 
     def get(self, path):
@@ -62,12 +55,23 @@ class Config(object):
 
         for element in elements:
             if last is None:
-                last = self._config[element]
+                last = self.__config[element]
             else:
                 last = last[element]
 
         return last
 
+    def get_root_nodes(self):
+        """
+        Returns all root notes as a list
+        :return: dict of root notes of YAML config file
+        """
+        nodes = []
+        for key in self.__config:
+            nodes.append(key)
+
+        return nodes
+
     def set(self, path, value):
         """
         Sets a config property value
@@ -75,7 +79,7 @@ class Config(object):
         :param value: Value to set property to
         :return:
         """
-        obj = self._config
+        obj = self.__config
         key_list = path.split(".")
 
         for k in key_list[:-1]: