/*

* 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:  Base class of item visualizer.

*

*/

#ifndef FSTREEITEMVISUALIZERBASE_H_

#define FSTREEITEMVISUALIZERBASE_H_

#include <e32base.h>

#include <alf/alfeventhandler.h>

#include "fstreeitemvisualizer.h"

#include "fslayoutmanager.h"

class TRgb;

class CAlfLayout;

class CAlfTexture;

class CAlfBrush;

class CAlfAnchorLayout;

class CAlfControl;

class CFsAlfTextStyleManager;

class CAlfTextVisual;

/**

 * CFsTreeItemVisualizerBase is a base class implementing methods common for

 * all tree items.

 *

 * Thic class is a concrete implementation for the MFsTreeItemVisualizer 

 * interface.

 * 

 * @code

 *

 * @endcode

 *

 * @lib 

 */

NONSHARABLE_CLASS(CFsTreeItemVisualizerBase) : public CBase,

                                               public MFsTreeItemVisualizer,

                                               public MAlfEventHandler

    {

public:

    /** 

     * C++ destructor

     */

     virtual ~CFsTreeItemVisualizerBase();

public:

    /**

     * Returns the type of the item's visualizer.

     */

    virtual TFsTreeItemVisualizerType Type() const;

    /**

     * Sets horizontal alignment of the displayed plain text.

     * 

     * For AH layout EAlfAlignHLeft is internally converted to EAlfAlignHRight

     * and EAlfAlignHRight is converted to EAlfAlignHLeft.

     * 

     * EAlfAlignHLocale (default setting) - alignment set according to text directionality

     * 

     * @param aAlign Horizontal text alignment type.

     */

    virtual void SetTextAlign( const TAlfAlignHorizontal aAlign );

    /**

     * The function sets item's text color for the focused state.

     *

     * @param aColor New color to be set.

     */

    virtual void SetFocusedStateTextColor( const TRgb& aColor );

    /**

     * The function returns item's text color for the focused state.

     */

    virtual TRgb FocusedStateTextColor() const;

    /**

     * The function sets item's text color for the normal (unfocused) state.

     *

     * @param aColor New color to be set.

     */

    virtual void SetNormalStateTextColor( const TRgb& aColor );

    /**

     * The function returns item's text color for the normal (unfocused) state

     */

    virtual TRgb NormalStateTextColor() const;

    /**

     * The function sets the style of item's text.

     * 

     * @param aTextStyleId Text style ID provided by the text style manager.

     */

    virtual void SetTextStyleId ( const TInt aTextStyleId );

    /**

     * The function returns the style of item's text.

     * 

     * @return Text style ID provided by the text style manager.

     */

    virtual TInt TextStyleId () const;

    /**

     * From MFsTreeItemVisualizer.

     * Sets multiple flags for an item at one time.

     * 

     * @param aFlags Flags for item visualizer.

     */

    virtual void SetFlags( TUint32 aFlags );

    /**

     * From MFsTreeItemVisualizer.

     * Returns flags of the item visualizer.

     * 

     * @return Item visualizer's flags value.

     */

    virtual TUint32 Flags();

    /**

     * From MFsTreeItemVisualizer.

     * Sets visualized item's state to marked/unmarked.

     * 

     * @param aFlag ETrue to visualize item as marked.

     */

    virtual void SetMarked( TBool aFlag );

    /**

     * From MFsTreeItemVisualizer.

     * Returns mark/unmark state of the item's visualization.

     * 

     * @return ETrue if item is visualized as marked.

     */

    virtual TBool IsMarked() const;

    /**

     * From MFsTreeItemVisualizer.

     * Sets visualized item's state to dimmed/not dimmed.

     * 

     * @param aFlag ETrue to visualize item as dimmed.

     */

    virtual void SetDimmed( TBool aFlag );

    /**

     * From MFsTreeItemVisualizer.

     * Returns dimmed/not dimmed state of the item's visualization.

     * 

     * @return ETrue if item is visualized as dimmed.

     */

    virtual TBool IsDimmed() const;

    /**

     * From MFsTreeItemVisualizer.

     * Sets the size of the item visualization when item is not in expanded 

     * state. 

     * 

     * @param aSize Size in pixels of the an when it is not expanded.

     */

    virtual void SetSize( const TSize aSize );

    /**

     * 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.

     * Sets the item's visualization state to expanded. This state is used to

     * preview more data of an item.

     * 

     * @param aFlag ETrue to visualize item as expanded.

     */

    virtual void SetExtended( const TBool aFlag );

    /**

     * From MFsTreeItemVisualizer.

     * Returns expanded/not expanded state of the item visualization.

     * 

     * @return ETrue if item is visualized as expanded.

     */

    virtual TBool IsExtended() const;    

    /**

     * From MFsTreeItemVisualizer.

     * Sets if an item can be in expanded state or not.

     * 

     * @param aFlag ETrue if item can be in expanded state.

     */

    virtual void SetExtendable( TBool aFlag );

    /**

     * From MFsTreeItemVisualizer.

     * Returns an information if item can be in expanded state.

     * 

     * @return ETrue if item can be in expanded state.

     */

    virtual TBool IsExtendable( );

    /**

     * From MFsTreeItemVisualizer

     * Returns an information if item can be focused.

     * 

     * @return ETrue if item can be focused.

     */

    virtual TBool IsFocusable( ) const;

    /**

     * From MFsTreeItemVisualizer

     * Used to set/unset item's ability to receive focus.

     * 

     * @param aFlag ETrue if item can be focused.

     */

    virtual void SetFocusable( const TBool aFlag );

    /**

     * From MFsTreeItemVisualizer.

     * Sets the size of the item visualization area when item is in expanded 

     * state. 

     * 

     * @param aSize Size in pixels of the item when it is expanded.

     */

    virtual void SetExtendedSize( const TSize aSize );

    /**

     * 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.

     * Sets visualized item's state to hidden/visible.

     * 

     * @param ETrue if item should be visualized as hidden.

     */

    virtual void SetHidden( TBool aFlag );

    /**

     * From MFsTreeItemVisualizer.

     * Returns an information if the item is hidden or not.

     * 

     * @return ETrue if item is hiddden, EFalse if item is visible.

     */

    virtual TBool IsHidden() ;

    /**

     * From MFsTreeItemVisualizer.

     * Enables or disables text shadow.

     * 

     * @param aShadowOn Pass ETrue if shadow should be enabled 

     * EFalse otherwise.

     */

    virtual void EnableTextShadow( const TBool aShadowOn = ETrue );

    /**

     * From MFsTreeItemVisualizer.

     * Sets text indentation.

     *

     * @param aIndentation Indentation in pixels.

     */

    virtual void SetIndentation( const TInt aIndentation = 0 );

    /**

     * From MFsTreeItemVisualizer.

     * Sets item background color.

     * 

     * @param aColor New background color.

     */

    virtual void SetBackgroundColor( const TRgb aColor );

    /**

     * From MFsTreeItemVisualizer.

     * Returns background color if it's set.

     * 

     * @param aColor Out parameter. Contains background color.

     * 

     * @return ETrue if background color is set, EFalse otherwise.

     */

    virtual TBool GetBackgroundColor( TRgb& aColor );

    /**

     * From MFsTreeItemVisualizer.

     * Sets item background texture.

     * 

     * @param aTexture New background texture.

     */

    virtual void SetBackgroundTexture( const CAlfTexture& aTexture );

    /**

     * From MFsTreeItemVisualizer.

     * Sets item background brush. Ownership not transfered.

     * 

     * @param aBrush New background brush.

     */

    virtual void SetBackgroundBrush( CAlfBrush* aBrush );

    /**

     * From MFsTreeItemVisualizer.

     * Returns item background brush.

     * 

     * @param aBrush Out parameter. Contains pointer to a background brush.

     *

     * @return ETrue if background brush is set, EFalse otherwise.

     */

    virtual TBool GetBackgroundBrush( CAlfBrush*& aBrush );

    /**

     * From MFsTreeItemVisualizer.

     * Returns background texture if it's set.

     * 

     * @param aTexture Out parameter. Contains pointer to a texture.

     * 

     * @return ETrue if background texture is set, EFalse otherwise.

     */

    virtual TBool GetBackgroundTexture( const CAlfTexture*& aTexture );

    /**

     * From MFsTreeItemVisualizer.

     * Clears item background.

     */

    virtual void ClearBackground( );

    /**

     * Sets menu for item

     * @param aMenu CTreeList object containing menu items

     */

    virtual void SetMenu( CFsTreeList* aMenu );

    /**

     * Returns CFsTreeList object contaning menu items

     * @return Menu for item.

     */

    virtual CFsTreeList* Menu() const;

    /**

     * This functions sets wether an item should always be in extended state.

     * 

     * @param ETrue if item should always be in extended state.

     */

    virtual void SetAlwaysExtended( TBool aAlwaysExtended );

    /**

     * This function returns wether an item is always in extended state.

     * 

     * @return ETrue if item is always in extended state.

     */

    virtual TBool IsAlwaysExtended( ) const;

    /**

     * Sets the text style manager for the item visualizer.

     * 

     * @param aManager Reference to the text style manager.

     */

    virtual void SetTextStyleManager( CFsAlfTextStyleManager& aManager );

    /**

     * Sets the text stroke weight for the item visualizer.

     * 

     * @param aIsBold ETrue if the text shoul be bold.

     */

    virtual void SetTextBold( const TBool aIsBold );

    /**

     * Method to set text font height in twips.

     * 

     * @param aHeightInTwips Text font height to be set.

     */

    virtual void SetFontHeight(const TInt aHeightInTwips);

    /**

     * Gets height of a text font in twips.

     * 

     * @return Height of the font in twips

     */

    virtual TInt FontHeight() const;

    /**

     * Method to set text font height in pixels.

     * 

     * @param aHeightInPixels Text font height to be set.

     */

    virtual void SetFontHeightInPixels(const TInt aHeightInPixels);

    /**

     * Gets height of a text font in pixels.

     * 

     * @return Height of the font in pixels.

     */

    virtual TInt FontHeightInPixels() const;

    /**

     * Gets the text stroke weight for the item visualizer.

     * 

     * @return ETrue if the text is be bold.

     */

    virtual TBool IsTextBold( ) const;

    /**

     * 

     */

    virtual CAlfLayout& Layout() const;

    /**

     * 

     */

    virtual void ShowL( CAlfLayout& aParentLayout,

            const TUint aTimeout = 0 );

    /**

     * 

     */

    virtual void UpdateL( const MFsTreeItemData& aData,

            TBool aFocused,

            const TUint aLevel,

            CAlfTexture*& aMenuIcon,

            const TUint aTimeout = 0,

            TBool aUpdateData = ETrue);

    /**

     * 

     */

    virtual void Hide( const TInt aTimeout = 0 );

    /**

     * From MFsTreeItemVisualizer.

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

     * 

     * @param aMarqueeType Type of marquee.

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

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

     * @param aMarqueeCycleStartDelay Marquee cycle's start delay.

     * @param aMarqueeRepetitions Number of marquee's cycles.

     */

    virtual void MarqueeL(const TFsTextMarqueeType aMarqueeType,

                          const TUint aMarqueeSpeed,

                          const TInt aMarqueeStartDelay,

                          const TInt aMarqueeCycleStartDelay,

                          const TInt aMarqueeRepetitions);

    /**

     * From MAlfEventHandler.

     * Called when an input event is being offered to this object.

     */

    virtual TBool OfferEventL(const TAlfEvent& aEvent);

public:

    /*

     * Layouting hints for the visualizers. Hints are binary flags so they can be mixed.

     */

    enum TLayoutHint

        {

        ENormalLayout = 0,

        // Use folder layout for item visualizers

        EFolderLayout = (1<<0),

        // Item visualizers are in popup

        EPopupLayout = (1<<1)

        };    

public:

    /**

     * Set layout hint(s). Given hints are ORed so previously set flags will remain.

     */

    virtual void SetLayoutHints( const TUint aHints );

    /**

     * Check if given layout hint is set.

     */

    virtual TBool IsLayoutHintSet( const TLayoutHint aHint ) const;

protected:

    /**

     * C++ constructor

     */

    CFsTreeItemVisualizerBase(CAlfControl& aOwnerControl);

    /**

     * Second phase constructor

     *

     */

    void ConstructL( );

protected:

    /**

     * Function gets text color for a focused item. The color is taken from 

     * the skin if skin support is on, if not then a default value is used.

     * 

     * @return aTextColor Text's color.

     */

    virtual TRgb FocusedStateTextSkinColor( );

    /**

     * Function gets text color for a non focused item. The color is taken 

     * from the skin if skin support is on, if not then a default value is