A filter that a SampleMechanism can place between the ProcessVariable and its ProcessVariableListener implementation. More...

#include <ProcessVariableFilter.h>

Inheritance diagram for ProcessVariableFilter:

Public Member Functions
	ProcessVariableFilter (ProcessVariableListener *listener)
	Create a PV filter which passes filtered events on to the provided listener.

virtual void	pvConnected (ProcessVariable &pv, const epicsTime &when)
	React to connection, then pass on to listener. More...

virtual void	pvDisconnected (ProcessVariable &pv, const epicsTime &when)
	React to disconnect, then pass on to listener. More...

virtual void	pvValue (ProcessVariable &pv, const RawValue::Data *data)
	React to new value and filter it. More...

Public Member Functions inherited from ProcessVariableStateListener
virtual	~ProcessVariableStateListener ()
	Constructor.

Detailed Description

A filter that a SampleMechanism can place between the ProcessVariable and its ProcessVariableListener implementation.

User provides the "downstream" listener in the constructor, then needs to install this filter as the listener for the PV or yet another "upstream" filter.

Member Function Documentation

virtual void ProcessVariableFilter::pvConnected	(	ProcessVariable &	pv,
		const epicsTime &	when
	)

virtual

React to connection, then pass on to listener.

See Also: ProcessVariableListener

Implements ProcessVariableStateListener.

Reimplemented in DisableFilter, and RepeatFilter.

virtual void ProcessVariableFilter::pvDisconnected	(	ProcessVariable &	pv,
		const epicsTime &	when
	)

virtual

React to disconnect, then pass on to listener.

See Also: ProcessVariableListener

Implements ProcessVariableStateListener.

Reimplemented in DisableFilter, and RepeatFilter.

virtual void ProcessVariableFilter::pvValue	(	ProcessVariable &	pv,
		const RawValue::Data *	data
	)

virtual

React to new value and filter it.

Might invoke listener with the value, another value, or not at all.

See Also: ProcessVariableListener

Implements ProcessVariableValueListener.

Reimplemented in DisableFilter, RepeatFilter, TimeFilter, and TimeSlotFilter.

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

/home/malitsky/projects/epics-archiver/sourceforge/trunk/ea4-cpp/include/common/engine/ProcessVariableFilter.h

Public Member Functions

Detailed Description

Member Function Documentation