+ /// Defines the double value
+ MODEL_EXPORT virtual void setText(const std::string& theText);
+
+ /// Returns the double value
+ MODEL_EXPORT virtual std::string text();
+
+ /// Allows to set expression (text) as invalid (by the parameters listener)
+ MODEL_EXPORT virtual void setExpressionInvalid(const bool theFlag);
+
+ /// Returns true if text is invalid
+ MODEL_EXPORT virtual bool expressionInvalid();
+