Collapse all Symbian^3 Application Developer Library

MContinuousZoomObserver Class Reference

class MContinuousZoomObserver

A mixin class to be implemented by the client in order to use the Continuous Zoom API. The callbacks are invoked by the implementation whenever the continuous zoom operations are ready to be notified.

CCameraContinuousZoom

Public Member Functions
void	ContinuousZoomCompleted ( CCamera::CCameraContinuousZoom &, TInt , TInt )
void	ContinuousZoomProgress ( CCamera::CCameraContinuousZoom &, TInt , TInt )
TInt	CustomInterface ( TUid , TAny *&)

Member Functions Documentation

ContinuousZoomCompleted(CCamera::CCameraContinuousZoom &, TInt, TInt)

void	ContinuousZoomCompleted	(	CCamera::CCameraContinuousZoom &	aContinuousZoomHandle,
			TInt	aFinalZoomFactor,
			TInt	aError
		)	[pure virtual]

Implementation sends this callback when the Continuous Zoom operation has been completed. This callback will be sent when target zoom factor is achieved. This zoom factor may in some cases be less than the target zoom factor due to the complexity of the continuous zoom operation. Once this callback is received, client need not issue StopContinuousZoom() and can call StartContinuousZoom() again.

Parameters

CCamera::CCameraContinuousZoom & aContinuousZoomHandle	Reference to CCameraContinuousZoom class object which was used to start the continuous zoom operation.
TInt aFinalZoomFactor	The final zoom factor value once the continuous zoom operation has completed. This zoom factor may in some cases be less than the target zoom factor due to the complexity of the continuous zoom operation.
TInt aError

ContinuousZoomProgress(CCamera::CCameraContinuousZoom &, TInt, TInt)

void	ContinuousZoomProgress	(	CCamera::CCameraContinuousZoom &	aContinuousZoomHandle,
			TInt	aZoomFactor,
			TInt	aError
		)	[pure virtual]

This callback is sent when a new zoom factor is achieved. Client may not receive a callback for every new zoom factor as it is up to the implementation to choose the zoom factors for which it will issue this callback. Should an error occur, this implies that the continuous zoom operation has been stopped.

Parameters

CCamera::CCameraContinuousZoom & aContinuousZoomHandle	Reference to CCameraContinuousZoom class object which was used to start the continuous zoom operation.
TInt aZoomFactor	The new zoom factor value, multiplied by KECamFineResolutionFactor, which has been achieved.
TInt aError	Appropriate error code.

CustomInterface(TUid, TAny *&)

TInt	CustomInterface	(	TUid	aInterface,
			TAny *&	aPtrInterface
		)	[pure virtual]

Gets a custom interface for future callbacks. This method will be called by the implementation to get a new interface which would support future callbacks.

Parameters

TUid aInterface	The Uid of the particular interface function required for callbacks.
TAny *& aPtrInterface	The implementation has to type-cast the retrieved custom interface pointer to the appropriate type.