+/// Message that parameter feature expression should be evaluated: value and error producing
+class ModelAPI_ParameterEvalMessage : public Events_Message
+{
+ FeaturePtr myParam; ///< parameters that should be evaluated
+ bool myIsProcessed; ///< true if results were set
+ /// result of processing, list of parameters in expression found
+ std::list<std::shared_ptr<ModelAPI_ResultParameter> > myParamsList;
+ double myResult; ///< result of processing, the computed value of the expression
+ std::string myError; ///< error of processing, empty if there is no error
+
+ public:
+ /// Static. Returns EventID of the message.
+ MODELAPI_EXPORT static Events_ID& eventId()
+ {
+ static const char * MY_PARAMETER_EVALUATION_EVENT_ID("ParameterEvaluationRequest");
+ static Events_ID anId = Events_Loop::eventByName(MY_PARAMETER_EVALUATION_EVENT_ID);
+ return anId;
+ }
+
+ /// Useful method that creates and sends the event.
+ /// Returns the message, processed, with the resulting fields filled.
+ MODELAPI_EXPORT static std::shared_ptr<ModelAPI_ParameterEvalMessage>
+ send(FeaturePtr theParameter, const void* theSender)
+ {
+ std::shared_ptr<ModelAPI_ParameterEvalMessage> aMessage =
+ std::shared_ptr<ModelAPI_ParameterEvalMessage>(
+ new ModelAPI_ParameterEvalMessage(eventId(), theSender));
+ aMessage->setParameter(theParameter);
+ Events_Loop::loop()->send(aMessage);
+ return aMessage;
+ }
+
+ /// Creates an empty message
+ MODELAPI_EXPORT ModelAPI_ParameterEvalMessage(const Events_ID theID, const void* theSender = 0);
+ /// The virtual destructor
+ MODELAPI_EXPORT virtual ~ModelAPI_ParameterEvalMessage();
+
+ /// Returns a parameter stored in the message
+ MODELAPI_EXPORT FeaturePtr parameter() const;
+ /// Sets a parameter to the message
+ MODELAPI_EXPORT void setParameter(FeaturePtr theParam);
+ /// Sets the results of processing
+ MODELAPI_EXPORT void setResults(
+ const std::list<std::shared_ptr<ModelAPI_ResultParameter> >& theParamsList,
+ const double theResult, const std::string& theError);
+ /// Returns true if the expression is processed
+ MODELAPI_EXPORT bool isProcessed();
+ /// Returns the results of processing: list of parameters found in the expression
+ MODELAPI_EXPORT const std::list<std::shared_ptr<ModelAPI_ResultParameter> >& params() const;
+ /// Returns the expression result
+ MODELAPI_EXPORT const double& result() const;
+ /// Returns the interpreter error (empty if no error)
+ MODELAPI_EXPORT const std::string& error() const;
+};
+
+
+/// Message to ask compute the positions of parameters in the expression
+class ModelAPI_ComputePositionsMessage : public Events_Message
+{
+ std::string myExpression; ///< the expression string
+ std::string myParamName; ///< name of the parameter to be searched
+ std::list<std::pair<int, int> > myPositions; ///< computation result: start-end position indices
+
+public:
+ /// Static. Returns EventID of the message.
+ MODELAPI_EXPORT static Events_ID& eventId()
+ {
+ static const char * MY_COMPUTE_POSITIOND_EVENT_ID("ComputePositionsRequest");
+ static Events_ID anId = Events_Loop::eventByName(MY_COMPUTE_POSITIOND_EVENT_ID);
+ return anId;
+ }
+
+ /// Useful method that creates and sends the AttributeEvalMessage event
+ /// Returns the message, processed, with the resulting fields filled
+ MODELAPI_EXPORT static std::shared_ptr<ModelAPI_ComputePositionsMessage>
+ send(const std::string& theExpression, const std::string& theParameter, const void* theSender)
+ {
+ std::shared_ptr<ModelAPI_ComputePositionsMessage> aMessage =
+ std::shared_ptr<ModelAPI_ComputePositionsMessage>(
+ new ModelAPI_ComputePositionsMessage(eventId(), theSender));
+ aMessage->set(theExpression, theParameter);
+ Events_Loop::loop()->send(aMessage);
+ return aMessage;
+ }
+
+ /// Creates an empty message
+ MODELAPI_EXPORT ModelAPI_ComputePositionsMessage(
+ const Events_ID theID, const void* theSender = 0);
+ /// The virtual destructor
+ MODELAPI_EXPORT virtual ~ModelAPI_ComputePositionsMessage();
+
+ /// Returns an expression stored in the message
+ MODELAPI_EXPORT const std::string& expression() const;
+ /// Returns a parameter name stored in the message
+ MODELAPI_EXPORT const std::string& parameter() const;
+ /// Sets an expression and parameter needed for computation
+ MODELAPI_EXPORT void set(const std::string& theExpression, const std::string& theParameter);
+ /// Sets the results of processing
+ MODELAPI_EXPORT void setPositions(const std::list<std::pair<int, int> >& thePositions);
+ /// Returns the results of processing: position start and end indices
+ MODELAPI_EXPORT const std::list<std::pair<int, int> >& positions() const;
+};
+