cameraappcontroller.h

S60官方摄像头程序

/*
* ============================================================================
*  Name     : CameraAppController.h
*  Part of  : CameraApp
*  Created  : 02/09/2004 by Forum Nokia
*  Description:
*     Interface between the UI and the external modules
*  Version:
*  Copyright: Nokia Corporation, 2004
* ============================================================================
*/

#ifndef __CAMERA_CONTROLLER_H__
#define __CAMERA_CONTROLLER_H__

#include <e32base.h>

#include <avkon.hrh>
#include <avkon.rsg>
#include <StringLoader.h>

#include <AknViewAppUi.h>
#include <savarset.h>

#define __WITHIN_MCI_LIBRARY 
#include <ImageConversion.h> 

#include <f32file.h>
#include "CameraApp.hrh"

class TVolumeInfo;
class TRequestStatus;
class TSysAgentEvent;
class CCoeControl;

class CCameraCaptureEngine;
class CPAlbImageData;
class CFbsBitmap;
class CAknKeySoundSystem;

const TInt KWhiteColor = 0;
_LIT(KJpgFileExtension, ".jpg");
_LIT8(KMimeType,"image/jpeg");

// The name for the image file.
_LIT(KImageFileName, "CameraApp");

const TInt KSnapSoundId = 2;

/**
* Interface between the UI and the external modules
*/
class CCameraAppController : public CBase
    {
    public: // Constructor and Destructor

        /**
         * Symbian OS C++ default constructor.
         */
        CCameraAppController(); 

        /**
         * Destructor
         */
        virtual ~CCameraAppController();

        /**
         * Symbian OS second phase constructor.
         */
        void ConstructL();  

    public:
		/**
		 * Set the zoom factor
		 * @param aEnable, enable the zooming
		 *        true  == increase the zoom factor
		 *        false == decrease the zoom factor
		 * @return zoom factor used
		 */
	    TInt SetZoomL(TBool aEnable);

		/**
		 * Check whether the camera is being used by another app.
		 * @return, true if it used by another app. 
		 */
	    TBool IsCameraUsedByAnotherApp();

		/**
		 * Handle the error message from the engine
		 * @param aError a error message to be handled
		 */
	    void HandleError(TInt aError );

		/**
		 * Set the engine state
		 * @param aState, new state of the engine
		 */
	    void SetEngineState( TEngineState aState );

		/**
		 * Get the engine state
		 * @return return the current engine state
		 */
	    TEngineState GetEngineState();

		/**
		 * Redraw the navi tabs	
		 */
	    void RedrawNaviTabsL();

		/**
		 * Returns whether the image coversion is in progress or not
		 * @return true if an image is being converted
		 */
	    TBool IsImageConversionInProgress();

		/**
		 * Update the conversion status
		 * @param aStatus, the status to be shown "Image saving..." etc
		 */
	    void ShowConversionStatusL(const TDesC &aStatus );

		/**
		 * Set the camera mode
		 * @param aCameraMode, the new camera mode
		 */
	    void SetCameraMode(TCameraState aCameraMode);       

        /**
        * Gives snapped image to be displayed in the current view
        * @return CFbsBitmap& image to be displayed
        */
        CFbsBitmap& GetSnappedImage();

        /**
        * Gives camera mode setting
        * @return TInt current camera mode
        */
        TCameraState CameraMode() const;

        /**
        * Gives reference to Active view container to Controller
        * @param aAppContainer reference to view container
        * @param aViewId active view Id 
        * @return void
        */
        void SetAppContainer( CCoeControl* aAppContainer, TCameraViewIds aViewId );

        /**
        * Initialize Camera 
        * @return void
        */
        void InitializeCameraL();       

        /**
        * Stops view finding
        * @return void
        */
        void StopViewFinder();

        /**
        * Starts the Active Objet that calls ViewFinding operation regularly
        * @return void
        */        
        void StartViewFinderL();

        /**
        * Gets image from image capture engine, and displays it on screen
        * @return void
        */
        void ViewFinding(CFbsBitmap& aFrame);

        /**
        * Snaps image through the Camera API
        * @return void
        */
        void SnapL();

        /**
        * Returns current quality factor
        * @return TJpegQualityFactor
        */
        TJpegQualityFactor QualityFactor() const;

        /**
        * Saves the snapped image on disk
        * @return void
        */        
        void SaveImageL();

        /**
        * Returns the complete path of the saved image
        * @return TDesC& complete path and name of the last saved image
        */
        const TDesC& ImagePath() const;
   
        /**
        * Initializes snap sound player
        * @return void
        */
        void CreateSoundPlayerL();

        /**
        * Returns default display mode
        * @return TDisplayMode
        */
        TDisplayMode DisplayMode() const;

        /**
        * Releases camera
        * @return void
        */
        void ReleaseCamera();

        /**
        * Bitmaps will be as close as possible to requested size but may not be exactly 
        * if only certain sizes are supported. The actual size used will be set in aSize
        * @param TSize, size of image
        * @return void
        */
        void SetActualVFSize( const TSize& aSize);

        /**
        * Plays snap sound by calling engine's StartPlay()
        * @param TInt aSoundId 
        * @return void
        */
        void PlaySnapSound( );

    private: 
		/**
		 * Powers off the camera
		 * @return void
		 */
		void PowerOff();

		/**
		 * Get the next usable file name
		 * @return void
		 */
		void GetNextUsableFileName();

    private: // data
        TCameraState iCameraMode;   
        CCameraCaptureEngine* iCameraCaptureEngine;
        CFbsBitmap* iBitmapSnap;
		HBufC* iImagePath;
        TFileName* iPath;

        CCoeControl* iContainer; //Not owned by class     

        TCameraViewIds iActiveView;
        RFs iFs;
		CAknKeySoundSystem* iSoundPlayer; //Not owned by the class
		TFileName iNewFileName;
    };

#endif // __CAMERA_CONTROLLER_H__