minor

misura/canon/option/proxy.py

@@ -205,11 +205,14 @@ def add_option(self, *args, **kwargs):
         """Creates a new option using the ao() utility function. 
         Migrate old one if existing."""
         out = {}
+        overwrite = True
+        if kwargs.has_key('overwrite'):
+            overwrite = kwargs.pop('overwrite')
         ao(out, *args, **kwargs)
         out = out.values()[0]
         key = out['handle']
         # If option was already defined, update old one with new values
-        if self.has_key(key):
+        if self.has_key(key) and overwrite:
             origin = self.gete(key).entry
             origin.update(out)
             out = origin

misura/canon/plugin/domains.py

@@ -128,6 +128,9 @@ def is_plotted(self, node):
         if not self.is_loaded(node):
             return False
         return len(self.model().is_plotted(node.path)) > 0
+
+    def double_clicked(self, node):
+        return False
 
     def check_node(self, node):
         """Check if node pertain to this domain"""