- Added still more error checking to PythonCPUPolicy. But the code which calls its methods should be updated to handle the new exceptions...

- Added a base class for cpu policy exceptions to make simpler their catching
- Implemented all numeric fields in dialogs with spinboxes, with bounds checking

git-svn-id: svn://svn.gna.org/svn/sgpemv2/trunk@838 3ecf2c5c-341e-0410-92b4-d18e462d057c

src/backend/cpu_policies_gatekeeper.cc

@@ -101,8 +101,18 @@ CPUPoliciesGatekeeper::activate_policy(History *history, CPUPolicy* policy)
 
   if (pos == end || pos->second != policy)
   {
-    _active_policies[history] = policy;
-    _active_policies[history]->activate();
+    try
+    {
+      policy->activate();
+      _active_policies[history] = policy;
+    }
+    catch(UserInterruptException e)
+    {
+      //FIXME what to do here???
+      //probably throwing again a MalformedPolicyException
+      //maybe the best idea. or can we just fallback
+      //to the previous policy?
+    }
   }
 }