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:  Header for  Pull Mode

    15  *

    16 */

    17 

    18 

    19 #ifndef MULPULLMODE_H

    20 #define MULPULLMODE_H

    21 

    22 //Includes

    23 #include "mulpushmode.h"

    24 

    25 namespace Alf

    26     {

    27     

    28 //Forward Declaration

    29 

    30 class IMulModelProvider;

    31 class MulAsyncDataProvider;

    32 

    33 /**

    34  *  Implementation for Pull Mode

    35  */

    36 class MulPullMode : public MulPushMode

    37     {

    38     

    39 public:

    40 	

    41 	/**

    42 	 * C++ constructor.

    43 	 * 

    44 	 * @param aDataWindow DataWindow for model

    45 	 * @param aModelProvider Data Provider for model

    46 	 */

    47     MulPullMode( MulPageDataWindow& aDataWindow,

    48 				 const IMulModelProvider& aModelProvider);

    49 	

    50 	/**

    51 	 * Destructor.

    52 	 */

    53 	~MulPullMode();

    54     

    55 public: //from MulPushMode

    56    	

    57 	

    58 	void Update( int aIndex, int aCount, 

    59                          const MulDataPath& aPath);

    60             

    61 	void Refresh(int aCount, const MulDataPath& aPath);				             

    62 	     

    63 	void SetData( int aIndex, auto_ptr<MulVisualItem> aVisualItem, 

    64                          const MulDataPath& aPath);

    65 

    66 	void SetTemplate( mulwidget::TLogicalTemplate aTemplateId );               

    67 	                    

    68 	void WindowSiftedDown();

    69 

    70 	void WindowSiftedUp();	

    71 	

    72 	void ModelCountChanged(int aOldCount, int aNewCount);

    73 	

    74 	void DataWindowUpdated();

    75 	

    76 	const MulVisualItem& Item( int aAbsoluteIndex );

    77 	                    	

    78 private:

    79 

    80 	/**

    81 	 * Create list of indices and call ProvideData method

    82 	 *

    83 	 * @param aStartIndex, Index form where the data should be fetched

    84 	 * @param aRange, Number of items for which data should be fetched

    85 	 */

    86 	void ProvideData(int aStartIndex, int aRange);

    87 	

    88 	/**

    89 	 * Update Loop buffer because of data window updation

    90 	 * 

    91 	 */

    92 	void UpdateLoopBuffer();

    93 	  				

    94 private: //data

    95 

    96 	//IMulModelProvider* mModelProvider; // Not own

    97 	auto_ptr<MulAsyncDataProvider> mModelProvider; // own

    98     };

    99     

   100     } // namespace Alf

   101 

   102 #endif // MULPULLMODE_H

   103     

   104 //End of file

   105