Add support of number of decimals to unit system

src/Base/UnitsApi.cpp

@@ -85,6 +85,7 @@ UnitsSchema  *UnitsApi::UserPrefSystem = new UnitsSchemaInternal();
 
 double   UnitsApi::UserPrefFactor [50];
 QString  UnitsApi::UserPrefUnit   [50];
+int      UnitsApi::UserPrefDecimals = 2;
 
 UnitsApi::UnitsApi(const char* filter)
 {
@@ -196,6 +197,16 @@ const double UnitsApi::getPrefFactorOf(QuantityType t)
     return UserPrefFactor[t];
 }
 
+void UnitsApi::setDecimals(int prec)
+{
+    UserPrefDecimals = prec;
+}
+
+int UnitsApi::getDecimals()
+{
+    return UserPrefDecimals;
+}
+
 void UnitsApi::setDefaults(void)
 {
     setPrefOf( Length       ,"mm"       );

src/Base/UnitsApi.h

@@ -101,6 +101,10 @@ public:
     static const QString getQuantityName(QuantityType t);
     /// get the translation factor for the default unit of a quantity
     static const double getPrefFactorOf(QuantityType t);
+    // set the number of decimals
+    static void setDecimals(int);
+    // fet the number of decimals
+    static int getDecimals();
     /// set the application defaults
     static void setDefaults(void);
     //@}
@@ -119,6 +123,8 @@ protected:
     static double   UserPrefFactor [50] ;
     /// name of the unit the user wants to use as quantities
     static QString  UserPrefUnit   [50] ;
+    /// number of decimals for floats
+    static int      UserPrefDecimals;
 
     // do the real work
     static double parse(const char*,bool &UsedUnit);