SoMFPath.h

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**=======================================================================*/
/*=======================================================================
** Author      : Paul S. Strauss (MMM yyyy)
**=======================================================================*/
/*=======================================================================
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**=======================================================================*/
/*=======================================================================
** Modified by : VSG (MMM YYYY)
**=======================================================================*/
 
 
#ifndef  _SO_MF_PATH_
#define  _SO_MF_PATH_
 
#include <Inventor/fields/SoSubField.h>
 
//
//  SoMFPath subclass of SoMField. Each field value is a pointer to an
//  SoPath. The field automatically maintains references to the paths
//  it points to and propagates notification from the paths.
//
 
class  SoMFPath : public SoMField
{
  // Use standard field stuff
  SO_MFIELD_HEADER(SoMFPath, SoPath *, SoPath *);
  SO_MFIELD_SETVALUESPOINTER_HEADER(SoPath *);
 
  SoPath* getPath(int index) const;
    
private:
  static void initClass();
  static void exitClass();
 
  // Propagates notification through field
  virtual void notify(SoNotList *list);
  
  // Update a copied field to use node copies if the head nodes have
  // been copied
  virtual void fixCopy(SbBool copyConnections);
  
  // Override this to also check the heads of the stored paths
  virtual SbBool referencesCopy() const;
 
  // Evaluates the field or engine the field is connected to,
  // storing the result in the field. This is const because it is
  // called by evaluate().
  virtual void evaluateConnection() const;
 
 private:
  SoNode **heads;       // Head nodes of paths (needed
  // to track notification)
  
  // Override this to maintain write-references in paths
  virtual void countWriteRefs(SoOutput *out) const;
  
  // Changes value in field without doing other notification stuff.
  // Keeps track of references and auditors.
  void setVal(int index, SoPath *newValue);
 
  SbIntList** indices;
};
 
#endif /* _SO_MF_PATH_ */