SoOutputData.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_OUTPUT_DATA_
#define  _SO_OUTPUT_DATA_
 
#include <Inventor/misc/SoBasic.h>
#include <Inventor/SbPList.h>
#include <Inventor/SbString.h>
#include <Inventor/SoType.h>
 
class SoEngine;
class SoFieldContainer;
class SoInput;
class SoOutput;
class SoEngineOutput;
 
//
//  Class: SoEngineOutputData
//
//  The SoEngineOutputData class holds data about engine outputs: the
//  number of outputs the engine has, the names of the outputs.
//
//  All engines of a given class share the same output data. Therefore,
//  to get information about a particular output in a particular engine
//  instance, it is necessary to pass that instance to the appropriate
//  method.
//
 
{
 public:
  // Default constructor
  SoEngineOutputData() { }
 
  SoEngineOutputData(const SoEngineOutputData *);
 
  // Constructor that takes number of fields as a hint
  SoEngineOutputData(int numOutputs) : outputs(numOutputs)
    { }
 
  // Destructor
  ~SoEngineOutputData();
 
  // Adds an output to current data, given name of output,
  // a pointer to field within the engine, and the type of output.
  void                addOutput(const SoEngine *defEngine,
                                const char *outputName,
                                const SoEngineOutput *output,
                                SoType type);
 
  // Returns number of outputs
  int                 getNumOutputs() const   { return outputs.getLength(); }
 
  // Returns name of output with given index
  const SbName &      getOutputName(int index) const;
 
  // Returns pointer to output with given index within given object instance
  SoEngineOutput *    getOutput(const SoEngine *engine,
                                int index) const;
 
  // Returns index of output, given the output and the engine it
  // is in.
  int                 getIndex(const SoEngine *engine,
                               const SoEngineOutput *output) const;
 
  // Returns type of output with given index
  const SoType &      getType(int index) const;
 
  // Methods to read and write the output descriptions
  SbBool              readDescriptions(SoInput *in,
                                       SoEngine *engine) const;
  void                writeDescriptions(SoOutput *out,
                                        SoEngine *engine) const;
 private:
  SbPList             outputs;        // List of outputs (SoOutputEntry)
};    
 
#endif /* _SO_OUTPUT_DATA_ */