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GrabberListener::tListenerType
tListenerType enumerates the callback types supported by the Grabber.
Enumeration Description
eDEVICELOST If this parameter is passed to Grabber::addListener, the method GrabberListener::deviceLost of a GrabberListener object is called.
eFRAMEREADY If this parameter is passed to Grabber::addListener, the method GrabberListener::frameReady of a GrabberListener object is called.
eOVERLAYCALLBACK If this parameter is passed to Grabber::addListener, the method GrabberListener::overlayCallback of a GrabberListener object is called.
eALL If this parameter is passed to Grabber::addListener, all 3 callbacks of GrabberListener will be called.

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