SoFile.h

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/*=======================================================================
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 * in Technical Data and Computer Software clause at DFARS 252.227-7013 and/or
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**=======================================================================*/
/*=======================================================================
** Author      : Paul S. Strauss (MMM yyyy)
**=======================================================================*/
/*=======================================================================
 *** THE CONTENT OF THIS WORK IS PROPRIETARY TO FEI S.A.S, (FEI S.A.S.),            ***
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 ***                        BORDEAUX, FRANCE                                        ***
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**=======================================================================*/
/*=======================================================================
** Modified by : VSG (MMM YYYY)
**=======================================================================*/
 
 
#ifndef  _SO_FILE_
#define  _SO_FILE_
 
#include <Inventor/misc/SoChildList.h>
#include <Inventor/nodes/SoNode.h>
#include <Inventor/fields/SoSFString.h>
#include <Inventor/fields/SoSFFilePathString.h>
 
class SoSensor;
class SoFieldSensor;
 
//
//  Class: SoFile
//
//  This node represents a subgraph that was read from a
//  named input file. When a file node is written out, just the field
//  containing the name of the file is written. (No children are
//  written out.) When one is encountered during reading, reading
//  continues from the named file, and all children found in the file
//  are added as hidden children of this node.
//
//  Whenever the name of the input file changes
//  (name.setValue("foo.iv")), the old children are removed and the
//  contents of the new file is read in.  The file node remembers
//  what directory the last file was read from, and will read the new
//  file from the same directory after checking the standard list of
//  directories (see the static methods on SoInput), assuming the
//  field isn't set to an absolute path name.
//
 
class SoGroup;
 
class  SoFile : public SoNode {
 
  SO_NODE_HEADER(SoFile);
 
 public:
  // Fields
  SoSFFilePathString name;
 
  SoFile();
 
  SoGroup *copyChildren() const;
 
  static void setSearchOK(SbBool flag);
 
  static SbBool getSearchOK() { return m_searchOK; };
 
 private:
  // Traversal methods for all the actions:
  virtual void doAction(SoAction *action);
  virtual void callback(SoCallbackAction *action);
  virtual void search(SoSearchAction *action);
  virtual void GLRender(SoGLRenderAction *action);
  virtual void getBoundingBox(SoGetBoundingBoxAction *action);
  virtual void getMatrix(SoGetMatrixAction *action);
  virtual void handleEvent(SoHandleEventAction *action);
  virtual void pick(SoPickAction *action);
  virtual void getPrimitiveCount(SoGetPrimitiveCountAction *action);
 
 private:
  static void initClass();
  static void exitClass();
  
  // Returns pointer to children
  virtual SoChildList *getChildren() const;
  
  // Copies the contents of the given node into this instance.
  // This copies without re-reading the file.
  virtual void copyContents(const SoFieldContainer *fromFC,
                            SbBool copyConnections);
  
 private:
  // Reads stuff into instance of SoFile. Returns FALSE on error.
  virtual SbBool readInstance(SoInput *in, unsigned short flags);
  
  virtual ~SoFile();
 
 private:
  SoChildList* children;
 
  void nameChangedCallback(SoInput *upIn = NULL);
  
  // These keep the image and filename fields in sync.
  SoFieldSensor *nameChangedSensor;
  static void nameChangedCB(void *, SoSensor *);
  
  // FALSE on read error.
  SbBool readOK;
  static SbBool m_searchOK;
 
};
 
#endif /* _SO_FILE_ */