NAME

       SoMFEngine — multiple-value field containing any number of pointers to engines

INHERITS FROM

       SoField > SoMField > SoMFEngine

SYNOPSIS

       #include <Inventor/fields/SoMFEngine.h>

          Methods from class SoMFEngine:

     static SoType       getClassTypeId()
     virtual void        getTypeId() const
     SoEngine *          operator [](int i) const
     const SoEngine * *  getValues(int start) const
     int                 find(SoEngine * targetValue, SbBool addIfNotFound = FALSE)
     void                setValues(int start, int num, const SoEngine * *newValues)
     void                set1Value(int index, SoEngine * newValue)
     SoEngine *          operator =(SoEngine * newValue)
     void                setValue(SoEngine * newValue)
     int                 operator ==(const SoMFEngine &f) const
     int                 operator !=(const SoMFEngine &f) const
     SoEngine * *        startEditing()
     void                finishEditing()

          Methods from class SoMField:

     int                 getNum() const
     void                setNum(int num)
     virtual void        deleteValues(int start, int num = -1)
     virtual void        insertSpace(int start, int num)
     SbBool              set1(int index, const char *valueString)
     void                get1(int index, SbString &valueString)

          Methods from class SoField:

     void                setIgnored(SbBool ignore)
     SbBool              isIgnored() const
     SbBool              isDefault() const
     virtual SbBool      isOfType(SoType type) const
     SbBool              set(const char *valueString)
     void                get(SbString &valueString)
     void                touch()
     SbBool              connectFrom(SoField *fromField)
     SbBool              connectFrom(SoEngineOutput *fromEngine)
     void                disconnect()
     SbBool              isConnected() const
     SbBool              isConnectedFromField() const
     SbBool              getConnectedField(SoField *&writingField) const
     SbBool              isConnectedFromEngine() const
     SbBool              getConnectedEngine(SoEngineOutput *&engineOutput) const
     void                enableConnection(SbBool flag)
     SbBool              isConnectionEnabled() const
     int                 getForwardConnections(SoFieldList &list) const
     SoFieldContainer *  getContainer() const

DESCRIPTION

       This  field maintains a set of pointers to SoEngine instances, correctly maintaining their
       reference counts.

       SoMFEngines are written to file as one or more  engines.  When  more  than  one  value  is
       present,  all  of  the values are enclosed in square brackets and separated by commas; for
       example:

          [ ElapsedTime { }, OneShot { duration 2.0 }, USE myCalculator ]

METHODS

     static SoType       getClassTypeId()
     virtual void        getTypeId() const
          Returns the type for this class or a particular object of this class.

     SoEngine *          operator [](int i) const
          Returns the i'th value of the field. Indexing past the end of the field (passing  in  i
          greater than getNum()) will return garbage.

     const SoEngine * *  getValues(int start) const
          Returns  a  pointer into the array of values in the field, starting at index start. The
          values are read-only; see the  startEditing()/finishEditing()  methods  for  a  way  of
          modifying values in place.

     int                 find(SoEngine * targetValue, SbBool addIfNotFound = FALSE)
          Finds the given value in the array and returns the index of that value in the array. If
          the value is not found, -1 is returned. If addIfNotFound is set,  then  targetValue  is
          added to the end of the array (but -1 is still returned).

     void                setValues(int start, int num, const SoEngine * *newValues)
          Sets  num  values starting at index start to the values in newValues. The array will be
          automatically be made larger to accomodate the new values, if necessary.

     void                set1Value(int index, SoEngine * newValue)
          Sets the index'th value in the array to  newValue.  The  array  will  be  automatically
          expanded, if necessary.

     SoEngine *          operator =(SoEngine * newValue)
     void                setValue(SoEngine * newValue)
          Sets  the  first  value in the array to newValue, and deletes the second and subsequent
          values.

     int                 operator ==(const SoMFEngine &f) const
     int                 operator !=(const SoMFEngine &f) const
          Returns TRUE if all of the values of this field equal (do not equal) those of the given
          field.  If  the  fields  are different types FALSE will always be returned (even if one
          field is an SoMFFloat with one value of 1.0 and the other is an SoMFInt with a value of
          1, for example).

     SoEngine * *        startEditing()
     void                finishEditing()
          startEditing()  returns  a  pointer  to  the  internally-maintained  array  that can be
          modified. The values in the array may  be  changed,  but  values  cannot  be  added  or
          removed.  It  is  illegal  to call any other editing methods between startEditing() and
          finishEditing() (e.g. set1Value(), setValue(), etc).

          Fields, engines or sensors connected to this field and sensors are  not  notified  that
          this  field has changed until finishEditing() is called. Calling finishEditing() always
          sets the isDefault() flag to FALSE and informs  engines  and  sensors  that  the  field
          changed, even if none of the values actually were changed.

                                                                                SoMFEngine(3IV)()