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:  A visualizer for empty tree root's data.

    15 *

    16 */

    17 

    18 

    19 #ifndef FSTREEPLAINROOTVISUALIZER_H_

    20 #define FSTREEPLAINROOTVISUALIZER_H_

    21 

    22 

    23 #include <e32base.h>

    24 //<cmail> removed __FS_ALFRED_SUPPORT flag

    25 //#include <fsconfig.h>

    26 //</cmail> removed __FS_ALFRED_SUPPORT flag

    27 

    28 #include "fstreenodevisualizerbase.h"

    29 

    30 class CAlfTextVisual;

    31 

    32 class MFsTreeItemData;

    33 class CFsTreeList;

    34 class CFsLayoutManager;

    35 

    36 /**

    37  * CFsTreePlainRootVisualizer is a visualizer for the empty tree root's data.

    38  *

    39  * Thic class is a concrete implementation for the MFsTreeNodeVisualizer 

    40  * interface. It provides visualization for the empty tree root's data. This 

    41  * visualizer is used when the list is empty. The list may for example display

    42  * "empty" text then.

    43  * 

    44  * @code

    45  *

    46  * @endcode

    47  *

    48  * @lib 

    49  */

    50 NONSHARABLE_CLASS( CFsTreePlainRootVisualizer ): 

    51                                             public CFsTreeNodeVisualizerBase

    52     {

    53 public:

    54 

    55     /**

    56      * Two-phased constructor

    57      * 

    58      * @param aOwnerControl Owner control.

    59      */

    60     IMPORT_C static CFsTreePlainRootVisualizer* NewL( 

    61                                                   CAlfControl& aOwnerControl);

    62     

    63     /**

    64     * C++ destructor

    65     */

    66     virtual ~CFsTreePlainRootVisualizer();

    67     

    68     

    69     /**

    70      * Returns the type of the item's visualizer.

    71      */

    72     virtual TFsTreeItemVisualizerType Type() const;

    73 

    74 

    75 public: // from base class MFsTreeItemVisualizer

    76 

    77     

    78     /**

    79      * From MFsTreeItemVisualizer.

    80      * A call to this function means that the visualization of empty root 

    81      * becomes visible and should draw itself within specified parent layout. 

    82      * Data to be visualized is passed as an argument. 

    83      * 

    84      * Parameter descriptions will be added when the final function prototype

    85      * is ready.

    86      */

    87     virtual void ShowL( CAlfLayout& aParentLayout,

    88             const TUint aTimeout = 0 );

    89 

    90     /**

    91     * A call to this function means that the item is requested to update its

    92     * visual content.

    93     */

    94     virtual void UpdateL( const MFsTreeItemData& aData,

    95                   TBool aFocused,

    96                   const TUint aLevel,

    97                   CAlfTexture*& aMarkIcon,

    98                   CAlfTexture*& aMenuIcon,                

    99                   const TUint aTimeout = 0,

   100                   TBool aUpdateData = ETrue);

   101     

   102     /**

   103      * From MFsTreeItemVisualizer.

   104      * A call to this function means that the the empty root visualization 

   105      * should become hidden.The visualizer should destroy all its visuals to 

   106      * save memory.

   107      */

   108     virtual void Hide( const TInt aTimeout = 0 );

   109     

   110     /**

   111      * From MFsTreeItemVisualizer.

   112      * This method marquees the text in tree item if it is too long.

   113      * 

   114      * @param aMarqueeType Type of marquee.

   115      * @param aMarqueeSpeed Speed of marquee in pixels per second.

   116      * @param aMarqueeStartDelay Marquee's start delay in miliseconds.

   117      * @param aMarqueeCycleStartDelay Marquee cycle's start delay.

   118      * @param aMarqueeRepetitions Number of marquee's cycles.

   119      */

   120     virtual void MarqueeL(const TFsTextMarqueeType aMarqueeType,

   121                           const TUint aMarqueeSpeed,

   122                           const TInt aMarqueeStartDelay,

   123                           const TInt aMarqueeCycleStartDelay,

   124                           const TInt aMarqueeRepetitions);

   125 

   126 

   127 protected:

   128 

   129     /**

   130      * C++ constructor

   131      * 

   132      * @param aOwnerControl Owner control.

   133      */

   134     CFsTreePlainRootVisualizer( CAlfControl& aOwnerControl );

   135     

   136     /**

   137      * Second phase constructor

   138      *

   139      */

   140     void ConstructL( );

   141     

   142 private:

   143     

   144     /**

   145      * Updates the layout metrics using layout manager that was set by 

   146      * tree visualizer. 

   147      * 

   148      * @param aLayoutManager Reference to the layout manager.

   149      */

   150     virtual void UpdateLayout( );

   151 

   152 private: // member data

   153     

   154     

   155     /**

   156      * Text visual.

   157      * Own.

   158      */

   159     CAlfTextVisual* iTextVisual;  

   160 

   161     };

   162 

   163 #endif /*FSTREEPLAINROOTVISUALIZER_H_*/