fgpropertymanager.h

6 DOF Missle Simulation

    bool SetDouble (const string &name, double val);


    /**
     * Set a string value for a property.
     *
     * Assign a string value to a property.  If the property does not
     * yet exist, it will be created and its type will be set to
     * STRING; if it has a type of UNKNOWN, the type will also be set to
     * STRING; otherwise, the string value will be converted to the property's
     * type.
     *
     * @param name The property name.
     * @param val The new value for the property.
     * @return true if the assignment succeeded, false otherwise.
     */
    bool SetString (const string &name, const string &val);


    ////////////////////////////////////////////////////////////////////////
    // Convenience functions for setting property attributes.
    ////////////////////////////////////////////////////////////////////////


    /**
     * Set the state of the archive attribute for a property.
     *
     * If the archive attribute is true, the property will be written
     * when a flight is saved; if it is false, the property will be
     * skipped.
     *
     * A warning message will be printed if the property does not exist.
     *
     * @param name The property name.
     * @param state The state of the archive attribute (defaults to true).
     */
    void SetArchivable (const string &name, bool state = true);


    /**
     * Set the state of the read attribute for a property.
     *
     * If the read attribute is true, the property value will be readable;
     * if it is false, the property value will always be the default value
     * for its type.
     *
     * A warning message will be printed if the property does not exist.
     *
     * @param name The property name.
     * @param state The state of the read attribute (defaults to true).
     */
    void SetReadable (const string &name, bool state = true);


    /**
     * Set the state of the write attribute for a property.
     *
     * If the write attribute is true, the property value may be modified
     * (depending on how it is tied); if the write attribute is false, the
     * property value may not be modified.
     *
     * A warning message will be printed if the property does not exist.
     *
     * @param name The property name.
     * @param state The state of the write attribute (defaults to true).
     */
    void SetWritable (const string &name, bool state = true);


    ////////////////////////////////////////////////////////////////////////
    // Convenience functions for tying properties, with logging.
    ////////////////////////////////////////////////////////////////////////


    /**
     * Untie a property from an external data source.
     *
     * Classes should use this function to release control of any
     * properties they are managing.
     */
    void Untie (const string &name);


        // Templates cause ambiguity here

    /**
     * Tie a property to an external bool variable.
     *
     * The property's value will automatically mirror the variable's
     * value, and vice-versa, until the property is untied.
     *
     * @param name The property name to tie (full path).
     * @param pointer A pointer to the variable.
     * @param useDefault true if any existing property value should be
     *        copied to the variable; false if the variable should not
     *        be modified; defaults to true.
     */
    void
    Tie (const string &name, bool *pointer, bool useDefault = true);


    /**
     * Tie a property to an external int variable.
     *
     * The property's value will automatically mirror the variable's
     * value, and vice-versa, until the property is untied.
     *
     * @param name The property name to tie (full path).
     * @param pointer A pointer to the variable.
     * @param useDefault true if any existing property value should be
     *        copied to the variable; false if the variable should not
     *        be modified; defaults to true.
     */
    void
    Tie (const string &name, int *pointer, bool useDefault = true);


    /**
     * Tie a property to an external long variable.
     *
     * The property's value will automatically mirror the variable's
     * value, and vice-versa, until the property is untied.
     *
     * @param name The property name to tie (full path).
     * @param pointer A pointer to the variable.
     * @param useDefault true if any existing property value should be
     *        copied to the variable; false if the variable should not
     *        be modified; defaults to true.
     */
    void
    Tie (const string &name, long *pointer, bool useDefault = true);


    /**
     * Tie a property to an external float variable.
     *
     * The property's value will automatically mirror the variable's
     * value, and vice-versa, until the property is untied.
     *
     * @param name The property name to tie (full path).
     * @param pointer A pointer to the variable.
     * @param useDefault true if any existing property value should be
     *        copied to the variable; false if the variable should not
     *        be modified; defaults to true.
     */
    void
    Tie (const string &name, float *pointer, bool useDefault = true);

    /**
     * Tie a property to an external double variable.
     *
     * The property's value will automatically mirror the variable's
     * value, and vice-versa, until the property is untied.
     *
     * @param name The property name to tie (full path).
     * @param pointer A pointer to the variable.
     * @param useDefault true if any existing property value should be
     *        copied to the variable; false if the variable should not
     *        be modified; defaults to true.
     */
    void
    Tie (const string &name, double *pointer, bool useDefault = true);

//============================================================================
//
//  All of the following functions *must* be inlined, otherwise linker
//  errors will result
//
//============================================================================

    /* template <class V> void
    Tie (const string &name, V (*getter)(), void (*setter)(V) = 0,
           bool useDefault = true);

    template <class V> void
    Tie (const string &name, int index, V (*getter)(int),
           void (*setter)(int, V) = 0, bool useDefault = true);

    template <class T, class V> void
    Tie (const string &name, T * obj, V (T::*getter)() const,
           void (T::*setter)(V) = 0, bool useDefault = true);

    template <class T, class V> void
    Tie (const string &name, T * obj, int index,
           V (T::*getter)(int) const, void (T::*setter)(int, V) = 0,
           bool useDefault = true); */

     /**
     * Tie a property to a pair of simple functions.
     *
     * Every time the property value is queried, the getter (if any) will
     * be invoked; every time the property value is modified, the setter
     * (if any) will be invoked.  The getter can be 0 to make the property
     * unreadable, and the setter can be 0 to make the property
     * unmodifiable.
     *
     * @param name The property name to tie (full path).
     * @param getter The getter function, or 0 if the value is unreadable.
     * @param setter The setter function, or 0 if the value is unmodifiable.
     * @param useDefault true if the setter should be invoked with any existing
     *        property value should be; false if the old value should be
     *        discarded; defaults to true.
     */

    template <class V> inline void
    Tie (const string &name, V (*getter)(), void (*setter)(V) = 0, bool useDefault = true)
    {
      if (!tie(name.c_str(), SGRawValueFunctions<V>(getter, setter), useDefault))
        cout << "Failed to tie property " << name << " to functions" << endl;
      else if (debug_lvl & 0x20)
        cout << name << endl;
    }


    /**
     * Tie a property to a pair of indexed functions.
     *
     * Every time the property value is queried, the getter (if any) will
     * be invoked with the index provided; every time the property value
     * is modified, the setter (if any) will be invoked with the index
     * provided.  The getter can be 0 to make the property unreadable, and
     * the setter can be 0 to make the property unmodifiable.
     *
     * @param name The property name to tie (full path).
     * @param index The integer argument to pass to the getter and
     *        setter functions.
     * @param getter The getter function, or 0 if the value is unreadable.
     * @param setter The setter function, or 0 if the value is unmodifiable.
     * @param useDefault true if the setter should be invoked with any existing
     *        property value should there be one; false if the old value should be
     *        discarded; defaults to true.
     */
    template <class V> inline void Tie (const string &name, int index, V (*getter)(int),
                                void (*setter)(int, V) = 0, bool useDefault = true)
    {
      if (!tie(name.c_str(), SGRawValueFunctionsIndexed<V>(index, getter, setter), useDefault))
        cout << "Failed to tie property " << name << " to indexed functions" << endl;
      else if (debug_lvl & 0x20)
        cout << name << endl;
    }


    /**
     * Tie a property to a pair of object methods.
     *
     * Every time the property value is queried, the getter (if any) will
     * be invoked; every time the property value is modified, the setter
     * (if any) will be invoked.  The getter can be 0 to make the property
     * unreadable, and the setter can be 0 to make the property
     * unmodifiable.
     *
     * @param name The property name to tie (full path).
     * @param obj The object whose methods should be invoked.
     * @param getter The object's getter method, or 0 if the value is
     *        unreadable.
     * @param setter The object's setter method, or 0 if the value is
     *        unmodifiable.
     * @param useDefault true if the setter should be invoked with any existing
     *        property value should there be one; false if the old value should be
     *        discarded; defaults to true.
     */
    template <class T, class V> inline void
    Tie (const string &name, T * obj, V (T::*getter)() const,
           void (T::*setter)(V) = 0, bool useDefault = true)
    {
      if (!tie(name.c_str(), SGRawValueMethods<T,V>(*obj, getter, setter), useDefault))
        cout << "Failed to tie property " << name << " to object methods" << endl;
      else if (debug_lvl & 0x20)
        cout << name << endl;
    }

    /**
     * Tie a property to a pair of indexed object methods.
     *
     * Every time the property value is queried, the getter (if any) will
     * be invoked with the index provided; every time the property value
     * is modified, the setter (if any) will be invoked with the index
     * provided.  The getter can be 0 to make the property unreadable, and
     * the setter can be 0 to make the property unmodifiable.
     *
     * @param name The property name to tie (full path).
     * @param obj The object whose methods should be invoked.
     * @param index The integer argument to pass to the getter and
     *        setter methods.
     * @param getter The getter method, or 0 if the value is unreadable.
     * @param setter The setter method, or 0 if the value is unmodifiable.
     * @param useDefault true if the setter should be invoked with any existing
     *        property value should be; false if the old value should be
     *        discarded; defaults to true.
     */
    template <class T, class V> inline void
    Tie (const string &name, T * obj, int index, V (T::*getter)(int) const,
                         void (T::*setter)(int, V) = 0, bool useDefault = true)
    {
      if (!tie(name.c_str(), SGRawValueMethodsIndexed<T,V>(*obj, index, getter, setter), useDefault))
        cout << "Failed to tie property " << name << " to indexed object methods" << endl;
      else if (debug_lvl & 0x20)
        cout << name << endl;
   }
};
}
#endif // FGPROPERTYMANAGER_H