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IlvLoopbackAccessor Class Reference

Watch attribute behavior. More...

#include <ilviews/protos/connacc.h>

Inheritance diagram for IlvLoopbackAccessor:
IlvUserAccessor IlvAccessor IlvExportOutputAccessor

Public Member Functions

 IlvLoopbackAccessor (const char *name, const IlvValueTypeClass *type, const char *outacc)
 Creates a watching behavior. More...
 
- Public Member Functions inherited from IlvUserAccessor
 IlvUserAccessor (const char *name, const IlvValueTypeClass *type, IlUInt flags=0)
 Constructor. More...
 
virtual IlBoolean isOutputValue (const IlSymbol *) const
 Queries if the accessor is an output accessor. More...
 
IlBoolean isPrivate () const
 Checks the private status. More...
 
IlBoolean isRuntime () const
 Checks the RunTime status. More...
 
void setPrivate (IlBoolean val)
 Sets the Private flag of this accessor. More...
 
void setRuntime (IlBoolean runTime)
 Sets the RunTime flag of this accessor. More...
 
- Public Member Functions inherited from IlvAccessor
 IlvAccessor (const char *name, IlvValueTypeClass *type)
 Creates a new accessor of name name and type type.
 
virtual IlBoolean changeValue (IlvAccessorHolder *object, const IlvValue &val)
 Called by the method IlvAccessible::changeValue() for each IlvAccessor attached to the IlvAccessorHolder.
 
virtual IlBoolean changeValues (IlvAccessorHolder *object, const IlvValue *values, IlUShort count)
 Called by the method IlvAccessible::changeValues() for each IlvAccessor attached to the IlvAccessorHolder.
 
virtual void getAccessors (const IlSymbol *const **accessors, const IlvValueTypeClass *const **types, IlUInt &count) const
 Returns the names and types of the values handled by this accessor. More...
 
const IlSymbolgetName () const
 Returns the name of the accessor. More...
 
IlvValueTypeClassgetType () const
 Returns the type of the accessor. More...
 
virtual IlBoolean isOutputAccessor (IlBoolean &inputAndOutput)
 Queries if the accessor is an output accessor. More...
 
virtual IlShort matchValues (const IlvAccessorHolder *object, const IlvValue *values, IlUShort count, IlvValue *matchingValues=0) const
 Returns the number of values that are handled by the accessor in the values array of length count. More...
 
virtual IlvValuequeryValue (const IlvAccessorHolder *object, IlvValue &val) const
 Called by the method IlvAccessible::queryValue() for each IlvAccessor attached to the IlvAccessorHolder.
 
virtual void queryValues (const IlvAccessorHolder *object, IlvValue *values, IlUShort count) const
 Called by the method IlvAccessible::queryValues() for each IlvAccessor attached to the IlvAccessorHolder.
 
void setName (const IlSymbol *name)
 Sets the name of the accessor. More...
 

Protected Member Functions

virtual void initialize (const IlvAccessorHolder *object)
 Attachment method to an IlvAccessorHolder. More...
 
- Protected Member Functions inherited from IlvUserAccessor
virtual IlUInt compareValues (const IlvAccessorHolder *object, const IlvAccessible *ref, IlvValue *values, IlUShort count, IlvValueArray &diffs) const
 Compares the values in ref and object and returns the differing values. More...
 
IlBoolean getValue (IlvValue &val, const IlvAccessorHolder *object, IlvDisplay *display, IlvValueTypeClass *typeClass=0, IlSymbol *typeVal=0, const IlvValue *arg=0) const
 Evaluates a parameter of a user accessor. More...
 

Detailed Description

Watch attribute behavior.

Library: ilvproto

This accessor class attaches a subscription to an observed attribute (also called output value). The attribute to which this behavior is attached will automatically be set to the value of the watched attribute when this watched attribute is modified. It is equivalent to an internal value subscription. The observed attribute must be capable of notification, that is, it must have a behavior of type 'Event', 'Callback', or 'Output'.

See also
IlvOutputAccessor, IlvCallbackAccessor, IlvEventAccessor, IlvExportOutputAccessor.

Constructor & Destructor Documentation

IlvLoopbackAccessor::IlvLoopbackAccessor ( const char *  name,
const IlvValueTypeClass type,
const char *  outacc 
)

Creates a watching behavior.

Parameters
nameName of the attribute to attach the behavior to.
typeType of the behavior, needed only for initialization.
outaccName of the notifying attribute (also called output value) that the accessor will watch. Whenever this notifying attribute is changed, the loopback accessor value is changed to the new value of the notifying attribute. This parameter should correspond to an attribute that has an attached 'notifying behavior' so that notification can occur.

Member Function Documentation

virtual void IlvLoopbackAccessor::initialize ( const IlvAccessorHolder object)
protectedvirtual

Attachment method to an IlvAccessorHolder.

This method is called when the accessor object is attached to a group. You can redefine it in subclasses of IlvUserAccessor to perform any kind of initialization.

Parameters
objectThe object the accessor is attached to.

Reimplemented from IlvUserAccessor.


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