/*

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

* All rights reserved.

* This component and the accompanying materials are made available

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

* which accompanies this distribution, and is available

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

*

* Initial Contributors:

* Nokia Corporation - initial contribution.

*

* Contributors:

*

* Description:  A visualizer class for the MultiLine item.

*

*/

#ifndef C_FSMULTILINEITEMVISUALIZER_H

#define C_FSMULTILINEITEMVISUALIZER_H

class CAlfControl;

class CAlfLayout;

class CAlfTexture;

class CFsMultiLineItemData;

#include "fstreeitemvisualizerbase.h"

/**

 * CFsMultiLineItemVisualizer is a visualizer for an item with 1-4 lines.

 *

 * This class is a concrete implementation for the MFsTreeItemVisualizer 

 * interface. It provides visualization for a Multiline item's data.

 * 

 * @code

 *

 * @endcode

 *

 * @lib 

 */

NONSHARABLE_CLASS( CFsMultiLineItemVisualizer ): 

                                  public CFsTreeItemVisualizerBase

    {

public:

    /**

     * Two-phased constructor

     * 

     * @param aOwnerControl Owner control.

     */

    IMPORT_C static CFsMultiLineItemVisualizer* NewL( 

                                                 CAlfControl& aOwnerControl );

    /** 

    * C++ destructor

    */

    virtual ~CFsMultiLineItemVisualizer();    

    //visualizer's interface

    /**

     * The function sets how many lines the multiline item has when it's not extended.

     * 

     * @param aNumberOfLines Number of lines in not extended state (1-4).Note that

     *        the value should be <= than the number of lines in extended state.

     */

    virtual void SetNumberOfLinesWhenNotExtended( TInt aNumberOfLines );

    /**

     * The function returns how many lines the item has when it's not extended.

     * 

     * @return Number of lines in not extended state (1-4).

     */

    virtual TInt NumberOfLinesWhenNotExtended( ) const;

    /**

     * The function sets how many lines the multiline item has when it's extended.

     * 

     * @param aNumberOfLines Number of lines in extended state (1-4).Note that

     *        the value should be >= than the number of lines in not extended state.

     */

    virtual void SetNumberOfLinesWhenExtended( TInt aNumberOfLines );

    /**

     * The function returns how many lines the item has when it's extended.

     * 

     * @return Number of lines in extended state (1-4).

     */

    virtual TInt NumberOfLinesWhenExtended( ) const;

    /**

     * The function sets state of the item's checkbox.

     * A call of this function should be followed by a call of list's 

     * visualizer's function UpdateItemL() or RefreshListViewL().

     * 

     * @param ETrue Sets checkbox to "on" state.

     *        EFalse Sets checkbox to "off" state.

     */

    virtual void SetCheckboxState( TBool aChecked );

    /**

     * The function returns state of the item's checkbox.

     * 

     * @return ETrue Checkbox is in "on" state.

     *         EFalse Checkbox is in "off" state.

     */

    virtual TBool CheckboxState () const;

    /**

     * The function sets whether place holders should be kept when icons in the 

     * first column are not present.

     * 

     * @param ETrue if place holders should be present. EFalse otherwise.

     */

    virtual void SetKeepEmptyIconsPlaceHolders( TBool aKeep );

    /**

     * The function returns whether place holders are kept in case icons are

     * not set.

     * 

     * @returm ETrue if place holders are present. EFasle otherwise.

     */

    virtual TBool IsKeepEmptyIconsPlaceHolders( ) const;

public: 

// from base class MFsTreeItemVisualizer

    /**

     * Returns the type of the item's visualizer.

     */

    virtual TFsTreeItemVisualizerType Type() const;

    /**

     * From MFsTreeItemVisualizer.

     * Returns the size of an item in a normal (not extended) state.

     * 

     * @return Size in pixels of an item when it is not extended.

     */

    virtual TSize Size() const;

    /**

     * From MFsTreeItemVisualizer.

     * Returns the size of an item in expanded state.

     * 

     * @return Size in pixels of the item when it is in expanded state.

     */

    virtual TSize ExtendedSize() const;

    /**

     * From MFsTreeItemVisualizer.

     * A call to this function means that the item is requested to draw itself

     * within specified parent layout. Data to be visualized is passed as an

     * argument. 

     * 

     * Parameter descriptions will be added when the final function prototype

     * is ready.

     */

    virtual void ShowL( CAlfLayout& aParentLayout,

                        const TUint aTimeout = 0 );

    /**

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

    * visual content.

    */

    virtual void UpdateL( const MFsTreeItemData& aData,

                          TBool aFocused,

                          const TUint aLevel,

                          CAlfTexture*& aMarkIcon,

                          CAlfTexture*& aMenuIcon,

                          const TUint aTimeout = 0,

                          TBool aUpdateData = ETrue);

    /**

     * From MFsTreeItemVisualizer.

     * A call to this function means that the item goes out of the visible 

     * items scope. The visualizer should destroy all its visuals to save 

     * memory.

     */

    virtual void Hide( const TInt aTimeout = 0 );

protected:

    /**

     * C++ constructor

     * 

     * @param aOwnerControl Owner control.

     */

    CFsMultiLineItemVisualizer( CAlfControl& aOwnerControl );

    /**

     * Second phase constructor

     *

     */

    void ConstructL( );

private:

    /**

     */

    void UpdateLayout(const CFsMultiLineItemData* aData, const TInt aIndentation );

    /**

     * Returns item's size in state with given number of lines.

     * 

     * @param  aNumberLines Number of item's lines (1-4)

     * @return Size of item. TSize(0,0) in case invalid number of lines was passed to the func.

     */

    TSize SizeWithNumberOfLines( const TInt aNumberLines ) const;

protected: //data

    /**

     * State of item's checkbox.

     * 

     * ETrue - checkbox is "on"

     * EFalse - checkbox is "off"

     */

    TBool iCheckState;

    /**

     * Place holders for empty icons should be kept or not.

     */

    TBool iKeepPlaceHolders;

    /**

     * Number of lines (1-4) when item is not extended.

     */

    TInt iNumLinesNotExtended;

    /**

     * Number of lines (1-4) when item is extended.

     */

    TInt iNumLinesExtended;

///////////////////////////first line///////////////////////////    

    /**

     * Text visual.

     * Own.

     */

    CAlfTextVisual* iFirstLineTextVis;

    /**

     * Visual for an icon.

     */

    CAlfImageVisual* iFirstLineIconVis;

    /**

     * Visual for a checkbox icon.

     */

    CAlfImageVisual* iCheckBoxIconVis;

    /**

     * Visual for a mark icon.

     */

    CAlfImageVisual* iMarkIconVis;

    /**

     * Visual for a menu icon.

     */

    CAlfImageVisual* iMenuIconVis;

///////////////////////////second line///////////////////////////

    /**

     * 

     */

    CAlfTextVisual* iSecondLineTextVis;

    /**

     * Visual for an icon.

     */

    CAlfImageVisual* iSecondLineIconVis;

///////////////////////////third line///////////////////////////

    /**

     */

    CAlfTextVisual* iThirdLineTextVis;

    /**

     * Visual for an icon.

     */

    CAlfImageVisual* iThirdLineIconVis;

///////////////////////////fourth line///////////////////////////

    /**

     */

    CAlfTextVisual* iFourthLineTextVis;

    /**

     * Visual for an icon.

     */

    CAlfImageVisual* iFourthLineIconVis;

    };

#endif //C_FSMULTILINEITEMVISUALIZER_H