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SoWWWInline Class Reference

The SoWWWInline class is a node used to include data from an URL. More...

#include <Inventor/nodes/SoWWWInline.h>

Inheritance diagram for SoWWWInline::

SoNode SoFieldContainer SoBase List of all members.

Public Types

enum  BboxVisibility { NEVER, UNTIL_LOADED, ALWAYS }

Public Methods

 SoWWWInline (void)
void setFullURLName (const SbString &url)
const SbString & getFullURLName (void)
SoGroup * copyChildren (void) const
void requestURLData (void)
SbBool isURLDataRequested (void) const
SbBool isURLDataHere (void) const
void cancelURLDataRequest (void)
void setChildData (SoNode *urldata)
SoNode * getChildData (void) const
virtual SoChildList * getChildren (void) const
virtual void doAction (SoAction *action)
virtual void doActionOnKidsOrBox (SoAction *action)
virtual void callback (SoCallbackAction *action)
virtual void GLRender (SoGLRenderAction *action)
virtual void getBoundingBox (SoGetBoundingBoxAction *action)
virtual void getMatrix (SoGetMatrixAction *action)
virtual void handleEvent (SoHandleEventAction *action)
virtual void search (SoSearchAction *action)
virtual void pick (SoPickAction *action)
virtual void getPrimitiveCount (SoGetPrimitiveCountAction *action)

Static Public Methods

void initClass (void)
void setFetchURLCallBack (SoWWWInlineFetchURLCB *f, void *userdata)
void setBoundingBoxVisibility (BboxVisibility b)
BboxVisibility getBoundingBoxVisibility (void)
void setBoundingBoxColor (SbColor &c)
const SbColor & getBoundingBoxColor (void)
void setReadAsSoFile (SbBool onoff)
SbBool getReadAsSoFile (void)

Public Attributes

SoSFString name
SoSFVec3f bboxCenter
SoSFVec3f bboxSize
SoSFNode alternateRep

Protected Methods

virtual ~SoWWWInline ()
virtual void addBoundingBoxChild (SbVec3f center, SbVec3f size)
virtual SbBool readInstance (SoInput *in, unsigned short flags)
virtual void copyContents (const SoFieldContainer *fromfC, SbBool copyconnections)

Detailed Description

The SoWWWInline class is a node used to include data from an URL.

If the URL is not a local file, the application is responsible for supplying a callback to a function which will fetch the data of the URL.

As long as no data has been imported, the scenegraph representation of the node will be that of a bounding box enclosing the geometry we expect to fetch from the URL. The application is naturally also responsible for specifying the expected dimensions of the geometry.

Member Enumeration Documentation

enum SoWWWInline::BboxVisibility
 

Used to enumerate bbox rendering strategies.

Enumeration values:
NEVER   Never render bounding box.
UNTIL_LOADED   Render bounding box until children are loaded.
ALWAYS   Always render bounding box, event when children are loaded.

Constructor & Destructor Documentation

SoWWWInline::SoWWWInline (  void ) 
 

Constructor.

SoWWWInline::~SoWWWInline (  )  [protected, virtual]
 

Destructor.

Member Function Documentation

void SoWWWInline::initClass (  void )  [static]
 

Sets up initialization for data common to all instances of this class, like submitting necessary information to the Coin type system.

Reimplemented from SoNode.

void SoWWWInline::setFullURLName (  const SbString & url ) 
 

If the SoWWWInline::name field specifies a relative URL, use this method to name the complete URL.

const SbString & SoWWWInline::getFullURLName (  void ) 
 

If a full URL has been set with the SoWWWInline::setFullURLName() method, return it. If not, returns the value of the SoWWWInline::name field.

SoGroup * SoWWWInline::copyChildren (  void )  const
 

Returns a subgraph with a deep copy of the children of this node.

void SoWWWInline::requestURLData (  void ) 
 

Start requesting URL data. This might trigger a callback to the callback set in SoWWWInline::setFetchURLCallBack().

SbBool SoWWWInline::isURLDataRequested (  void )  const
 

Returns TRUE if SoWWWInline::requestURLData() has been called without being canceled by SoWWWInline::cancelURLData().

SbBool SoWWWInline::isURLDataHere (  void )  const
 

Return TRUE if the current child data has been read from file an URL.

void SoWWWInline::cancelURLDataRequest (  void ) 
 

Can be used to signal that URL loading has been canceled. You should use this method if you intend to request URL data more than once.

void SoWWWInline::setChildData (  SoNode * urldata ) 
 

Manually set up the subgraph for this node.

SoNode * SoWWWInline::getChildData (  void )  const
 

Returns the child data for this node. This can be data read from a file, from an URL, from the contents of SoWWWInline::alternateRep or that was manually set with SoWWWInline::setChildData().

SoChildList * SoWWWInline::getChildren (  void )  const [virtual]
 

Returns the child list with the child data for this node.

Reimplemented from SoNode.

void SoWWWInline::setFetchURLCallBack (  SoWWWInlineFetchURLCB * f,
void * userdata
)  [static]
 

Sets the URL fetch callback. This will be used in SoWWWInline::readInstance() or when the user calls SoWWWInline::requestURLData().

void SoWWWInline::setBoundingBoxVisibility (  BboxVisibility b )  [static]
 

Sets the bounding box visibility strategy.

SoWWWInline::BboxVisibility SoWWWInline::getBoundingBoxVisibility (  void )  [static]
 

Returns the bounding box visibility.

void SoWWWInline::setBoundingBoxColor (  SbColor & c )  [static]
 

Sets the bounding box color.

const SbColor & SoWWWInline::getBoundingBoxColor (  void )  [static]
 

Returns the bounding box color.

void SoWWWInline::setReadAsSoFile (  SbBool onoff )  [static]
 

Sets whether children should be read from a local file, in the same manner as SoFile children are read.

If this is set to TRUE, the URL must point to a file on the local file system, as can be accessed by the standard C library fopen() call.

SbBool SoWWWInline::getReadAsSoFile (  void )  [static]
 

Returns if children should be read from local files.

See also:
setReadAsSoFile()

void SoWWWInline::doAction (  SoAction * action )  [virtual]
 

This function performs the typical operation of a node for any action.

Reimplemented from SoNode.

void SoWWWInline::doActionOnKidsOrBox (  SoAction * action )  [virtual]
 

This method should probably have been private in OIV. It is obsoleted in Coin. Let us know if you need it.

void SoWWWInline::callback (  SoCallbackAction * action )  [virtual]
 

Action method for SoCallbackAction.

Simply updates the state according to how the node behaves for the render action, so the application programmer can use the SoCallbackAction for extracting information about the scene graph.

Reimplemented from SoNode.

void SoWWWInline::GLRender (  SoGLRenderAction * action )  [virtual]
 

Action method for the SoGLRenderAction.

This is called during rendering traversals. Nodes influencing the rendering state in any way or who wants to throw geometry primitives at OpenGL overrides this method.

Reimplemented from SoNode.

void SoWWWInline::getBoundingBox (  SoGetBoundingBoxAction * action )  [virtual]
 

Action method for the SoGetBoundingBoxAction.

Calculates bounding box and center coordinates for node and modifies the values of the action to encompass the bounding box for this node and to shift the center point for the scene more towards the one for this node.

Nodes influencing how geometry nodes calculates their bounding box also overrides this method to change the relevant state variables.

Reimplemented from SoNode.

void SoWWWInline::getMatrix (  SoGetMatrixAction * action )  [virtual]
 

Action method for SoGetMatrixAction.

Updates action by accumulating with the transformation matrix of this node (if any).

Reimplemented from SoNode.

void SoWWWInline::handleEvent (  SoHandleEventAction * action )  [virtual]
 

Action method for SoHandleEventAction.

Inspects the event data from action, and processes it if it is something which this node should react to.

Nodes influencing relevant state variables for how event handling is done also overrides this method.

Reimplemented from SoNode.

void SoWWWInline::search (  SoSearchAction * action )  [virtual]
 

Action method for SoSearchAction.

Compares the search criteria from the action to see if this node is a match. Searching is done by matching up all criteria set up in the SoSearchAction -- if any of the requested criteria is a miss, the search is not deemed successful for the node.

See also:
SoSearchAction

Reimplemented from SoNode.

void SoWWWInline::pick (  SoPickAction * action )  [virtual]
 

Action method for SoPickAction.

Does common processing for SoPickAction action instances.

Reimplemented from SoNode.

void SoWWWInline::getPrimitiveCount (  SoGetPrimitiveCountAction * action )  [virtual]
 

Action method for the SoGetPrimitiveCountAction.

Calculates the number of triangle, line segment and point primitives for the node and adds these to the counters of the action.

Nodes influencing how geometry nodes calculates their primitive count also overrides this method to change the relevant state variables.

Reimplemented from SoNode.

void SoWWWInline::addBoundingBoxChild (  SbVec3f center,
SbVec3f size
)  [protected, virtual]
 

Convenience method that extends the current bounding box to include the box specified by center and size.

SbBool SoWWWInline::readInstance (  SoInput * in,
unsigned short flags
)  [protected, virtual]
 

This method is mainly intended for internal use during file import operations.

It reads a definition of an instance from the input stream in. The input stream state points to the start of a serialized / persistant representation of an instance of this class type.

TRUE or FALSE is returned, depending on if the instantiation and configuration of the new object of this class type went ok or not. The import process should be robust and handle corrupted input streams by returning FALSE.

flags is used internally during binary import when reading user extension nodes, group nodes or engines.

Reimplemented from SoNode.

void SoWWWInline::copyContents (  const SoFieldContainer * fromfc,
SbBool copyconnections
)  [protected, virtual]
 

Makes a deep copy of all data of from into this instance, except external scenegraph references if copyconnections is FALSE.

This is the method that should be overridden by subclasses which needs to account for internal data that are not handled automatically.

Make sure that when you override the copyContents() method in your extension class that you also make it call upwards to it's parent superclass in the inheritance hierarchy, as copyContents() in for instance SoNode and SoFieldContainer does important work. It should go something like this: 

  void
  MyCoinExtensionNode::copyContents(const SoFieldContainer * from,
                                    SbBool copyconnections)
  {
    // let parent superclasses do their thing (copy fields, copy
    // instance name, etc etc)
    SoNode::copyContents(from, copyconnections);

    // [..then copy internal data..]
  }

Reimplemented from SoNode.

Member Data Documentation

SoSFString SoWWWInline::name
 

Name of file/URL where children should be read.

SoSFVec3f SoWWWInline::bboxCenter
 

Center of bounding box.

SoSFVec3f SoWWWInline::bboxSize
 

Size of bounding box.

SoSFNode SoWWWInline::alternateRep
 

Alternate representation. Used when children can't be read from name.

The documentation for this class was generated from the following files:
Generated at Tue Mar 5 03:31:33 2002 for Coin by doxygen1.2.9 written by Dimitri van Heesch, © 1997-2001