1 /*

     2 * Copyright (c) 2006 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:  Utility class for impementing Parent/Child class

    15 *

    16 */

    17 

    18 #include "ParentChildIntfc.h"

    19 

    20 CParentIntfc::~CParentIntfc()

    21     {

    22     TInt count = iChildrenList.Count();

    23     CChildIntfc* childPtr(NULL);

    24     for (TInt index(0); index < count; index++)

    25         {

    26         if (GetChild(index, childPtr) == KErrNone)

    27             {

    28             childPtr->ParentDeleted(*((CParentIntfc*)this));

    29             }

    30         }

    31     iChildrenList.Close();

    32     }

    33 

    34 TInt CParentIntfc::GetChildCount()

    35     {

    36     return iChildrenList.Count();

    37     }

    38 

    39 TInt CParentIntfc::GetChild( TInt aIndex, CChildIntfc*& aChild )

    40     {

    41     TInt status(KErrArgument);

    42     if ( (0 <= aIndex ) && ( aIndex < iChildrenList.Count() ) )

    43         {

    44         aChild = iChildrenList[aIndex];

    45         status = KErrNone;

    46         }

    47     return status;

    48     }

    49 

    50 TInt CParentIntfc::SetChild( CChildIntfc& aChild )

    51     {

    52     TInt status(KErrAlreadyExists);

    53     if ( iChildrenList.Find(&aChild) == KErrNotFound )

    54         {

    55         status = iChildrenList.Append(&aChild);

    56         }

    57     return status;

    58     }

    59 

    60 void CParentIntfc::ChildDeleted( CChildIntfc& aChild )

    61     {

    62     TInt index(iChildrenList.Find(&aChild));

    63     if ( index != KErrNotFound )

    64         {

    65         iChildrenList.Remove(index);

    66         }

    67     }

    68 

    69 CChildIntfc::~CChildIntfc()

    70     {

    71     if ( iParent )

    72         {

    73         iParent->ChildDeleted(*((CChildIntfc*)this));

    74         }

    75     }

    76 

    77 void CChildIntfc::ParentDeleted( CParentIntfc& aParent )

    78     {

    79     if ( iParent == &aParent )

    80         {

    81         iParent = NULL;

    82         }

    83     }

    84 

    85 TInt CChildIntfc::GetParent( CParentIntfc*& aParent )

    86     {

    87     TInt status(KErrNotFound);

    88     if ( iParent )

    89         {

    90         aParent = iParent;

    91         status = KErrNone;

    92         }

    93     return status;

    94     }

    95 

    96 TInt CChildIntfc::SetParent( CParentIntfc& aParent )

    97     {

    98     TInt status(KErrAlreadyExists);

    99     if ( !iParent )

   100         {

   101         iParent = &aParent;

   102         status = KErrNone;

   103         }

   104     return status;

   105     }

   106 

   107 // End of file