/*

* Copyright (c) 2010 ISB.

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of the "Symbian Foundation License v1.0"

* which accompanies this distribution, and is available

* at the URL "http://www.symbianfoundation.org/legal/sfl-v10.html".

*

* Initial Contributors:

* ISB - Initial contribution

*

* Contributors:

*

* Description:

*

*/

#ifndef ECAMWEBCAMERAACTIVE_H

#define ECAMWEBCAMERAACTIVE_H

#include "ecamwebcameraplugin.h"

/**

 *  Perform an Async demand of the camera application

 */

class CWebCameraActive : public CActive

	{

private:

	/**

    Active Operation of ECamWebCamera

    */

	enum TECamWebCameraActiveOperation

		{

		ECamActiveIdle = 0,

		ECamActiveReserve,

		ECamActivePowerOn,

		ECamActiveImageCapture,

		};

public:

    /** Constructor */

    /**

     * @param aOwner 

     		  pointer to callback object.

     * @param aDriver 

     		  reference to driver.

     */

    CWebCameraActive(MWebCameraActiveCallBack* aOwner, RWebcameraDevice& aDriver);

	/** Destructor */

	~CWebCameraActive();

    /**

     * Two-phased constructor.

     * @param aOwner 

     		  pointer to callback object.

     * @param aDriver 

     		  reference to driver.

     */

	static CWebCameraActive* NewL(MWebCameraActiveCallBack* aOwner, RWebcameraDevice& aDriver);

	/** 

	Asynchronous function that performs any required initialisation and reserves

	the camera for exclusive use.

	Calls CWebCamera::ReserveCallBack when complete. 

	*/

	void Reserve();

	/** 

	Asynchronous method to switch on camera power.

	User must have successfully called Reserve() prior to calling this function.

	Calls CWebCamera::PowerOnCallBack when power on is complete. 

	*/

	void PowerOn();

	/** 

	Cancels the asynchronous still image capture. 

	Calls CWebCamera::ImageCaptureCallBack when capture is complete. 

	* @param aDes descriptor to store a capture image

	*/

	void ImageCapture(TInt& aChunkSize);

	/** 

	Cancels the asynchronous still image capture. 

	@see CWebCamera::CancelCaptureImage

	*/

	void CancelCaptureImage();

private:

	void ConstructL();

private:

    /**

     * RunL.

     */

	void RunL();

	void DoCancel();

	void ViewFinderComplete(TInt aError);

private:

	MWebCameraActiveCallBack*		iOwner;		// origin of start.

	TECamWebCameraActiveOperation	iOperation;	// Status of the Active Operation of ECamWebCamera

	RWebcameraDevice				iDriver;	// Camera driver

	};

#endif // ECAMWEBCAMERAPLUGIN_H