SoMField.h

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**=======================================================================*/
/*=======================================================================
** Author      : Paul S. Strauss (MMM yyyy)
** Modified by : Nick Thompson (MMM yyyy)
** Modified by : Gavin Bell (MMM yyyy)
**=======================================================================*/
/*=======================================================================
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**=======================================================================*/
/*=======================================================================
** Modified by : VSG (MMM YYYY)
**=======================================================================*/
 
 
#ifndef  _SO_MFIELD_
#define  _SO_MFIELD_
 
#include <Inventor/fields/SoField.h>
 
//
//  Class: SoMField
//
//  Field that can have multiple values.
//
 
class  SoMField : public SoField {
 
 public:
  // Destructor
#ifndef HIDDEN_FROM_DOC
  virtual ~SoMField();
#endif // HIDDEN_FROM_DOC
 
  int getNum() const { evaluate(); return num; }
 
  void setNum(int num);
 
  virtual void deleteValues(int start, int num = -1);
 
  virtual void insertSpace(int start, int num);
 
  SoNONUNICODE SbBool set1(int index, const char *valueString);
 
 
  SbBool set1(int index, const SbString& valueString);
 
  void get1(int index, SbString &valueString);
 
  static SoType getClassTypeId();
  
 private:
  static void initClass();
  static void exitClass();
 
  static void *createInstance(SoType* dynamicType = NULL);
  
  // Data change notification
  int  getChangedStartIndex();
  int  getChangedNumValues();
  int  getChangedType();
 
  void valueChanged(int start = -1, int numValues = -1, SbBool resetDefault = TRUE);
 
  // Reads one indexed value of field from file
  virtual SbBool read1Value(SoInput *in, int index) = 0;
  
  // Writes indexed value to file
  virtual void write1Value(SoOutput *out, int index) const = 0;
 
  virtual void writeBinaryValues(SoOutput*, int , int ) const;
  virtual SbBool readBinaryValues(SoInput*, int , int );
  virtual void* getValuesPointer( int ) { return NULL; }
 
 private:
  // Constructor
  SoMField();
  
  // Make sure there is room for newNum vals
  virtual void makeRoom(int newNum);
 
  // Notified changes
  void  resetChangedStatus();
  int   changedStartIndex;
  int   changedNumValues;
 
private:
  static SoType classTypeId;
  
  // Allocates room for num values. Copies old values (if any) into
  // new area. Deletes old area, if any.
  virtual void allocValues(int num) = 0;
  
  // Deletes all current values
  virtual void deleteAllValues() = 0;
  
  // Copies value indexed by "from" to value indexed by "to"
  virtual void copyValue(int to, int from) = 0;
  
  // Reads all values of field
  virtual SbBool readValue(SoInput *in);
  
  // Writes all values of field
  virtual void writeValue(SoOutput *out) const;
  
  // Reads array of binary values from file
  virtual SbBool readBinaryValues(SoInput *in, int numToRead);
  
  // Writes array of binary values to file
  virtual void writeBinaryValues(SoOutput *out) const;
  
  // Returns number of ASCII values to write per output line (default 1)
  virtual int   getNumValuesPerLine() const;
  
private:
  SoMemoryObject* m_memObj;
};
 
#endif /* _SO_MFIELD_ */