1 /*

     2 * Copyright (c) 2007 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:  MFsNodeVisualizer is an interface for the node visualizer.

    15 *

    16 */

    17 

    18 

    19 #ifndef M_FSTREENODEVISUALIZER_H

    20 #define M_FSTREENODEVISUALIZER_H

    21 

    22 

    23 #include "fstreeitemvisualizer.h"

    24 

    25 

    26 /**

    27  * MFsNodeVisualizer is an interface for the node visualizer.

    28  *

    29  * This is an interface for node visualization in the tree. This interface is 

    30  * based on item visualization interface. This interface adds functions to 

    31  * change node's visualization state between collapsed and unrolled.

    32  * @code

    33  *

    34  * @endcode

    35  *

    36  * @lib 

    37  */

    38 NONSHARABLE_CLASS ( MFsTreeNodeVisualizer ): public MFsTreeItemVisualizer

    39     {

    40 public:

    41 

    42     /**

    43      * C++ destructor

    44      */

    45     virtual ~MFsTreeNodeVisualizer() {};    

    46     

    47 public:

    48 

    49     /**

    50      * Sets visualized node's state to rolled/unrolled.

    51      * 

    52      * @param aFlag ETrue to visualize node as rolled (collapsed).

    53      */

    54     virtual void SetExpanded( TBool aFlag, const MFsTreeItemData* aData = 0 ) = 0;

    55     

    56     /**

    57      * Returns rolled/unrolled state of the node's visualization.

    58      * 

    59      * @return ETrue if node is visualized as rolled (collapsed).

    60      */

    61     virtual TBool IsExpanded() const = 0;

    62     

    63     };

    64         

    65 #endif // M_FSTREENODEVISUALIZER_H