1 /*

     2 * Copyright (c) 2007-2008 Nokia Corporation and/or its subsidiary(-ies). 

     3 * All rights reserved.

     4 * This component and the accompanying materials are made available

     5 * under the terms of "Eclipse Public License v1.0"

     6 * which accompanies this distribution, and is available

     7 * at the URL "http://www.eclipse.org/legal/epl-v10.html".

     8 *

     9 * Initial Contributors:

    10 * Nokia Corporation - initial contribution.

    11 *

    12 * Contributors:

    13 *

    14 * Description:  Active Object header for providing data asynchronously

    15 *

    16 */

    17 

    18 

    19 #ifndef __MULASYNCDATAPROVIDER_H__

    20 #define __MULASYNCDATAPROVIDER_H__

    21 

    22 #include <e32base.h>    // For CActive

    23 #include <mul/imulmodelprovider.h>

    24 #include <mul/muldatapath.h>

    25 #include <vector>

    26 

    27 #include "muldatawindow.h"

    28 #include "mulpagedatawindow.h"

    29 

    30 using namespace std;

    31 //Forward declarations

    32 

    33 

    34 namespace Alf

    35 	{

    36 //Forward declarations

    37 

    38 class MulAsyncData

    39     {

    40 public:

    41     bool operator == (const MulAsyncData& aData )

    42         {

    43         return ( this->mStartIndex == aData.mStartIndex && this->mRange == aData.mRange );

    44         }

    45 public:

    46     int mStartIndex;

    47 	int mRange;

    48 	MulDataPath mPath;

    49     };

    50 

    51 class MulAsyncDataProvider : public CActive

    52 	{

    53 	

    54 public : // Constructor and Destructor

    55     

    56     /// need to have two-phase construction

    57     /// - otherwise mixing leaves and throws

    58 	MulAsyncDataProvider( IMulModelProvider& aDataProvider, const MulPageDataWindow& aDataWindow );

    59 	

    60 	~MulAsyncDataProvider();

    61 	

    62     void ProvideData( int aStartIndex, int aRange, const MulDataPath& aPath, const bool aIsSync = false );

    63     

    64 private: 

    65 	

    66 	/**

    67 	 * Active call back funtion . 

    68 	 */

    69 	void RunL();

    70 	

    71 	void DoCancel();

    72 	

    73 	void ActivateAndComplete();

    74 	

    75 	int GetFirstIndexForWhichDataIsPresent(int aStartIndex, int aEndIndex);

    76 	  

    77 private: //data

    78 

    79 	IMulModelProvider&             mDataProvider;

    80 	vector<MulAsyncData>           mDataQueue;

    81 	const MulPageDataWindow&       mDataWindow;

    82 	}; //end of class.

    83 	

    84 	} // End of namespace .

    85 

    86 #endif  //__MULASYNCDATAPROVIDER_H__

    87 

    88 // End of file