ScXMLAssignElt Class Reference

the <assign> SCXML element. More...

#include <Inventor/scxml/ScXMLAssignElt.h>

Inheritance diagram for ScXMLAssignElt:

Public Member Functions
virtual SoType	getTypeId (void) const
	Returns the type identification of an object derived from a class inheriting SoBase. This is used for run-time type checking and "downward" casting. More...
	ScXMLAssignElt (void)
virtual void	setLocationAttribute (const char *location)
virtual const char *	getLocationAttribute (void) const
virtual void	setDataIDAttribute (const char *dataID)
virtual const char *	getDataIDAttribute (void) const
virtual void	setExprAttribute (const char *expr)
virtual const char *	getExprAttribute (void) const
virtual SbBool	handleXMLAttributes (void)
virtual void	copyContents (const ScXMLElt *rhs)
virtual const ScXMLElt *	search (const char *attrname, const char *attrvalue) const
virtual void	execute (ScXMLStateMachine *statemachine) const
Public Member Functions inherited from ScXMLElt
void	setXMLAttribute (const char *attribute, const char *value)
const char *	getXMLAttribute (const char *attribute) const
ScXMLElt *	clone (void) const
virtual void	setContainer (ScXMLElt *container)
ScXMLElt *	getContainer (void) const
SbBool	isContainedIn (const ScXMLElt *object) const
Public Member Functions inherited from ScXMLObject
SbBool	isOfType (SoType type) const
	Returns TRUE if the type of this object is either of the same type or inherited from type. More...

Static Public Member Functions
static ScXMLEltReader *	getElementReader (void)
static SoType	getClassTypeId (void)
static void *	createInstance (void)
static void	initClass (void)
static void	cleanClass (void)
Static Public Member Functions inherited from ScXMLExecutableElt
static SoType	getClassTypeId (void)
static void	initClass (void)
static void	cleanClass (void)
Static Public Member Functions inherited from ScXMLElt
static SoType	getClassTypeId (void)
static void	initClass (void)
static void	cleanClass (void)
Static Public Member Functions inherited from ScXMLObject
static SoType	getClassTypeId (void)
	This static method returns the SoType object associated with objects of this class. More...
static void	initClass (void)
	Sets up initialization for data common to all instances of this class, like submitting necessary information to the Coin type system. More...
static void	cleanClass (void)
	Does the opposite of initClass, deallocates any class specific resources and resets the class to an uninitialized state with respect to the Coin typesystem.

Protected Attributes
char *	location
char *	dataID
char *	expr

Additional Inherited Members
Static Protected Member Functions inherited from ScXMLElt
static void	registerClassType (const char *xmlns, const char *classname, SoType type)
static void	registerInvokeClassType (const char *xmlns, const char *targettype, const char *source, SoType type)
Static Protected Member Functions inherited from ScXMLObject
static void	registerClassType (const char *xmlns, const char *classname, SoType type)
static void	registerInvokeClassType (const char *xmlns, const char *targettype, const char *source, SoType type)

Detailed Description

the <assign> SCXML element.

The <assign> element is only functional under a profile that has an implementation of The Data Module. The "minimum" profile does not implement one, but the "x-coin" profile does.

The following attributes are accepted:

• location
• dataID
• expr

Only one of location and dataID can be specified at a time.

If dataID is specified, then the target of the assignment is the <data> element that has the ID attribute set to the same value.

If location is specified, a profile-dependent variable addressing is used. The "minimum" profile does not define any, and the "x-coin" profile defines the following address schemes for writable variables:

• _data.{id} means targeting an existing <data> variable.
• coin:temp.{id} means targeting a temporary variable, creating one if necessary.

Temporary variables in the "x-coin" profile have the lifetime of one SCXML event. To have persistent data, use <data> variables. They stay alive for the same duration the ScXMLStateMachine exists.

Temporary variables are particularly useful for the <send> element, because the namelist attribute can address them with implicit prefix, which means the event targets can read them out based on logical names instead of SCXML datamodel addresses.

See also

ScXMLDataModelElt, ScXMLDataElt, ScXMLSendElt

Constructor & Destructor Documentation

ScXMLAssignElt()

ScXMLAssignElt::ScXMLAssignElt

(

void

)

Constructor that sets up an empty ScXMLAssignElt object.

Member Function Documentation

getTypeId()

SoType ScXMLAssignElt::getTypeId ( void  ) const

virtual

Returns the type identification of an object derived from a class inheriting SoBase. This is used for run-time type checking and "downward" casting.

See also

SoBase::getTypeId() const

Implements ScXMLExecutableElt.

initClass()

void ScXMLAssignElt::initClass ( void  )

static

Creates the ScXMLAssignElt class type SoType object.

cleanClass()

void ScXMLAssignElt::cleanClass ( void  )

static

Cleans out the class type SoType object.

handleXMLAttributes()

SbBool ScXMLAssignElt::handleXMLAttributes ( void  )

virtual

This method is called when the file reader has set all the XML attributes on the object, and wants the object to handle them and report if the values were ok or if a read error should be produced.

Returns

TRUE if the attributes are ok, and FALSE on error.

This base class implementation does nothing and just returns TRUE.

Reimplemented from ScXMLElt.

search()

const ScXMLElt * ScXMLAssignElt::search ( const char *  attrname, const char *  attrvalue  ) const

virtual

This method searches the SCXML structure for an element with the given attributevalue for the given attribute.

Returns NULL if nothing was found.

This function needs to be reimplemented to traverse child elements.

Reimplemented from ScXMLElt.

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The documentation for this class was generated from the following files:

• ScXMLAssignElt.h
• ScXMLAssignElt.cpp