/*

* Copyright (c) 2006 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:  MPX common container definition for hg lib.

*

*/

#ifndef CMPXCOMMONCONTAINERHGIMP_H

#define CMPXCOMMONCONTAINERHGIMP_H

// INCLUDES

#include <e32hashtab.h>

#include <ganes/HgScrollBufferObserverIface.h>

#include <ganes/HgSelectionObserverIface.h>

#include <ganes/HgItem.h>

#include <thumbnailmanager.h>

#include <thumbnailmanagerobserver.h>

#include <mpxattribute.h>

#include "mpxcommoncontainer.h"

// FORWARD DECLARATIONS

class MEikCommandObserver;

class CEikMenuPane;

class MEikListBoxObserver;

class CAknIconArray;

class CMPXCommonListBoxArrayBase;

class CMPXMediaArray;

class CAknSearchField;

class MCoeControlObserver;

class CMPXCommonContainerMediaHelper;

class CMPXCommonContainerTextureManager2;

class CMPXCommonUiHelper;

class CHgScroller;

class CHgScrollerWithTitle;

class CAknsBasicBackgroundControlContext;

//Albumart request queue

struct TAlbumArtRequest

	{

  TInt        iIndex;

	HBufC*		iAlbumArtUri;

  TSglQueLink iLink;

	};

// CLASS DECLARATION

/**

 *  Container class for Hg common container.

 *  The view class should implement the following virtual function

 *  from MEikCommandObserver

 *

 *  virtual void ProcessCommandL(TInt aCommandId);

 *

 *  common container uses this to pass commands back to the view class

 *  the commands supported are defined in mpxcommoncontainer.hrh

 *

 *  view container class owns this class to access List widget commands, receive

 *  CoeControl events and GetHelpContext(). The view container class should

 *  implement the following virtual functions from MViewContainer

 *

 *  virtual void HandleKeyEvent();

 *  virtual void HandleHelpContent();

 *

 *  common container uses this to pass CoeControl events back to the view

 *  container class.

 *

 *  view class should handle the following commands in ProcessCommandL

 *  from MEikCommandObserver:

 *

 *  EMPXCmdCommonDelete  // delete key pressed

 *  EMPXCmdCommonResourceChange  // resource change

 *  EMPXCmdCommonEnterKey  // enter key pressed

 *

 *  @lib mpxcommoncontainer.lib

 *  @since S60 v3.1

 */

NONSHARABLE_CLASS( CMPXCommonContainerHgImp )

    : public CCoeControl

    , public MCoeControlObserver

    , public MMPXCommonContainer

	, public MHgScrollBufferObserver

	, public MHgSelectionObserver

    , public MThumbnailManagerObserver

    {

public:

    /**

     * default C++ constructor.

     */

    CMPXCommonContainerHgImp();

    /**

     * Destructor.

     */

    virtual ~CMPXCommonContainerHgImp();

// from base class MMPXCommonContainer

    /**

     * Return Coe Control

     *

     * @since 3.2

     */

    CCoeControl* CoeControl();

    /**

     * Set View Container

     *

     * @since 3.2

     */

    void SetViewContainer( MMPXViewContainer* aViewContainer );

    /**

     * Set command observer for container

     *

     * @since 3.2

     */

    void SetCommandObserver( MEikCommandObserver* aCommandObserver );

    /**

     * Set list box observer for container

     *

     * @since 3.2

     */

    void SetListBoxObserver( MEikListBoxObserver* aObserver );

    /**

     * Set layout for all elements and set sizes for icons.

     *

     * @since 3.1

     */

    void UpdateLayout();

    /**

     * Returns list box array, ownership not transfered

     *

     * @since 3.1

     * @return A pointer to the list box array

     */

    CMPXCommonListBoxArrayBase* ListBoxArray() const;

    /**

     * Sets up the listbox array, ownership not transferred

     */

    void SetListBoxArrayL( CMPXCommonListBoxArrayBase* aListBoxArray );

    /**

     * Return number of listbox items shown in the current listbox.

     *

     * @since 3.1

     * @return The number of items shown in the list box

     */

    TInt CurrentListItemCount() const;

    /**

     * Return total number of listbox items in the listbox.

     *

     * @since 3.1

     * @return Total items in the list box

     */

    TInt TotalListItemCount() const;

    /**

     * Gets top listbox item index (relative to the original listbox).

     * @return Top listbox item index

     *

     * @since 3.1

     */

    TInt TopLbxItemIndex() const;

    /**

     * Gets bottom listbox item index (relative to the original listbox).

     * @return Bottom listbox item index

     *

     * @since 3.1

     */

    TInt BottomLbxItemIndex() const;

    /**

     * Gets current listbox item index (relative to the original listbox).

     * @return Current listbox item index

     *

     * @since 3.1

     */

    TInt CurrentLbxItemIndex() const;

    /**

     * Get current selected listbox items indices (relative to the original

     * listbox). Ownership not transferred.

     *

     * @since 3.1

     * @return Current listbox item indices

     */

    const CArrayFix<TInt>* CurrentSelectionIndicesL() const;

    /**

     * Sewt current selected listbox items indices

     *

     * @since 3.1

     * @param aIndices Array of selection indices, ownership not transfered

     */

    void SetCurrentSelectionIndicesL( CArrayFix<TInt>* aIndices ) const;

    /**

     * Set top listbox item index.

     *

     * @since 3.1

     * @param aIndex Actual listbox index.

     */

    void SetLbxTopItemIndex( TInt aIndex );

    /**

     * Set current listbox item index.

     *

     * @since 3.1

     * @param aIndex Actual listbox index.

     */

    void SetLbxCurrentItemIndex( TInt aIndex );

    /**

     * Set current listbox item index and highlight it.

     *

     * @since 3.1

     * @param aIndex Actual listbox index.

     */

    void SetLbxCurrentItemIndexAndDraw( TInt aIndex );

    /**

     * Clear listbox selection.

     *

     * @since 3.1

     */

    void ClearLbxSelection();

    /**

     * Sets list box backround text. This text is visible if the list box

     * has no items.

     *

     * @param aText The text for the empty list box background.

     * @since 3.2

     */

	void SetLbxEmptyTextL( const TDesC& aText );

    /**

     * Draws list box item index

     *

     * @since 3.2

     */

    void DrawLbxItemL( TInt aIndex );

    /**

     * Set Find box's focus.

     *

     * @since 3.1

     * @param aFocus ETrue if set focus on FindBox. Otherwise, EFalse.

     */

    void SetFindBoxFocus( TBool aFocus );

    /**

     * Handle listbox item addition.

     *

     * @since 3.1

     */

    void HandleLbxItemAdditionL();

    /**

     * Handle listbox item addition, preserving the current display index.

     *

     * @since 3.1

     */

    void HandleLbxItemAdditionPreserveIndexL();

    /**

     * Handle listbox item removal.

     *

     * @since 3.1

     */

    void HandleLbxItemRemovalL();

    /**

     * Show/hide find box

     *

     * @since 3.1

     * @param aIsVisible ETrue to set findbox visible. Otherwise, EFalse

     */

    void SetFindBoxVisibilityL( TBool aIsVisible );

    /**

     * Determine find box visibility

     *

     * @since 3.1

     * @return ETrue if find box is currently visible, EFalse otherwise

     */

    TBool FindBoxVisibility();

    /**

     * Restore the PopupCBA of find box

     */

    void RestoreFindBoxPopupCBA();

    /**

     * Calculate the top index of the visible items

     *

     * @since 3.1

     * @param aBottomIndex the bottom index of the visible items

     * @return top index

     */

    TInt CalculateTopIndex( TInt aBottomIndex );

    /**

     * Creates the container

     *

     * @since 3.1

     * @param aRect the rectangle that defines the control's extent.

     */

    void ConstructContainerL( TMPXCommonContainerCollectionType /*aCollectionTyp*/ );

    /**

     * Enable/disable find box

     *

     * @since 3.1

     * @aEnable ETrue to enable find box, EFalse to disable

     */

    void EnableFindBox( TBool aEnable );

    /**

     * Enable/disable marking

     *

     * @since 3.1

     * @aEnable ETrue to enable marking, EFalse to disable

     */

    void EnableMarking( TBool aEnable );

    /**

     * Custom handling of commands for markable lists.

     */

    void HandleMarkableListProcessCommandL( TInt aCommand );

    /**

     * Custom handling of menu pane for markable lists

     */

    void HandleMarkableListDynInitMenuPaneL(

        TInt aResourceId,

        CEikMenuPane* aMenuPane );

    /**

     * Handle listbox array events

     *

     *  @param aEvent list box event

     */

    void HandleListBoxArrayEventL(

        MMPXCommonListBoxArrayObserver::TMPXCommonListBoxArrayEvents aEvent );

    /**

     * Handles key events.

     *

     * @param aKeyEvent The key event.

     * @param aType The type of key event.

     */

    TKeyResponse HandleKeyEventL(

        const TKeyEvent& aKeyEvent,

        TEventCode aType );

    /**

     * Activate the container

     */

    void ActivateContainerL();

// from base class CCoeControl

    /**

     * From CCoeControl.

     * Handles key events.

     *

     * @param aKeyEvent The key event.

     * @param aType The type of key event.

     */

    TKeyResponse OfferKeyEventL(

        const TKeyEvent& aKeyEvent,

        TEventCode aType );

    /**

     * From CCoeControl.

     * Gets the control's help context.

     *

     * @param aContext The control's help context.

     */

    void GetHelpContext( TCoeHelpContext& aContext ) const;

    /**

     * From CoeControl.

     * Handles a change to the control's resources.

     *

     * @param aType A message UID value.

     */

    void HandleResourceChange( TInt aType );

    /**

     * From CoeControl.

     * Draw this application's view to the screen

     *

     * @param aRect the rectangle of this view that needs updating

     */

    void Draw( const TRect& aRect ) const;

    /**

     * From CoeControl.

     * Get the control input capabilities

     */

	TCoeInputCapabilities InputCapabilities() const;

// from base class MCoeControlObserver

    /**

    * From MCoeControlObserver, Acts upon changes in the hosted control's state.

    * This class's implementation is trivial and should be able to be safely

    * re-implemented in directly client-derived classes. For non-base setting

    * page classes, a call to the base class should be made.

    * @param aControl Control that caused the event. (not used in default implementation)

    * @param aEventType Type of the event.

    */

    void HandleControlEventL(CCoeControl* aControl,TCoeEvent aEventType);

// from base class MHgScrollBufferObserver

    /**

     * from MHgScrollBufferObserver

     * Buffer position changed.

     * The items between the aBufferStart and aBufferEnd should be loaded as soon as possible.

     *

     * @param aBufferStart The index of the first item in buffer.

     * @param aBufferEnd The index of the last item in buffer.

     * @param aDirection report direction of scrolling

     */

    void Request(TInt aBufferStart, TInt aBufferEnd, THgScrollDirection aDirection);

// from base class MHgBufferOwner

    /**

     * from MHgBufferOwner

     *

     *

     */

    void Release(TInt aReleaseStart, TInt aReleaseEnd);

// from base class MHgSelectionObserver

    /**

     * Handle selection.

     *

     * @param aIndex Selected item index.

     */

    void HandleSelectL( TInt aIndex );

    /**

     * Handle opening.

     *

     * @param aIndex Opened item index.

     */

    void HandleOpenL( TInt aIndex );

public: // from base class MThumbnailManagerObserver

    /**

     * From MThumbnailManagerObserver

     * Preview thumbnail generation or loading is complete.

     *

     * @param aThumbnail     An object representing the resulting thumbnail.

     * @param aId            Request ID for the operation

     */

    void ThumbnailPreviewReady( MThumbnailData& aThumbnail, TThumbnailRequestId aId );

    /**

     * From MThumbnailManagerObserver

     * Final thumbnail bitmap generation or loading is complete.

     *

     * @param aError         Error code.

     * @param aThumbnail     An object representing the resulting thumbnail.

     * @param aId            Request ID for the operation.

     */

    void ThumbnailReady( TInt aError, MThumbnailData& aThumbnail, TThumbnailRequestId aId );

    TTypeUid::Ptr MopSupplyObject(TTypeUid aId);

private:

    /**

     * Create list box

     */

    void CreateListBoxL( TInt count );

    /**

     * Create list box with Title

     */

    void CreateListBoxWithTitleL( TInt count );

    /**

     * Creates icon array, populates iIconArray to be used by listbox

     */

    void CreateIconArrayL();