/*

* Copyright (c) 2008-2009 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:    AppUi class 

*

*/

#ifndef C_GLXWERAPPUI_H

#define C_GLXWERAPPUI_H

#include <aknViewAppUi.h>

#include <mpxcollectionobserver.h>

#include <mglxnavigationalstateobserver.h>

#include <mpxcollectionpath.h>

#include "glxiadupdate.h"

class MMPXViewUtility;

class MMPXCollectionUtility;

class CGlxUiUtility;

class CRepository;

class CGlxNavigationalState;

class CAknGlobalNote;

/**

 *  CGlxAppUi

 *

 *  @lib ViewerApplication

 */

class CGlxAppUi : public CAknViewAppUi, public MGlxNavigationalStateObserver

	{

public:

	CGlxAppUi();

	void ConstructL();

	~CGlxAppUi();

public: // from CAknAppUi

	/**

	 * From CAknAppUi

     * Handle user menu selections

  	 * @param aCommand Id of the command

     */

	void HandleCommandL(TInt aCommand);

    // From MGlxNavigationalStateObserver

    void HandleNavigationalStateChangedL();

    //OOM Method

    void HandleApplicationSpecificEventL(TInt aEventType, const TWsEvent& aWsEvent);

    // Callback for periodic timer, static, 

    static TInt PeriodicCallback( TAny* aPtr );

    //nonstatic func called from periodic timer

    void PeriodicCallback();

private:    // From CEikAppUi

    MCoeMessageObserver::TMessageResponse HandleMessageL(

                            TUint32 aClientHandleOfTargetWindowGroup,

                            TUid aMessageUid, const TDesC8& aMessageParameters);

    TBool ProcessCommandParametersL(TApaCommand aCommand,

                            TFileName& aDocumentName, const TDesC8& aTail);

private: // From CCoeAppUi

    void HandleForegroundEventL( TBool aForeground );

private:

    enum TEntryType

        {

        EEntryTypeStartUp = 0,

        EEntryTypeFocusGained

        };

    /**

     * Handle an activation message.

     * @param aCommand command data sent from the activating application.

     * @param aDocumentName image file name data sent from the activating application.

     * @param aData Message data from activating application.

     */

    void HandleActivationMessageL(const TApaCommand& aCommand, const TFileName& aDocumentName, const TDesC8& aData);

	 /**

     * Handle an activation message.    

     * @param aData Message data from activating application.

     */

    void HandleActivationMessageL(const TDesC8& aData);

    /**

     * Set activation parameter for startup view, converting to 16-bit

     * descriptor used by MPX.

     * @param aParam Activation parameter.

     */

    void SetActivationParamL(const TDesC8& aParam);

    /**

     * Get view scoring ids based on current navigational state

     * (using Get in the name since the function does not return anything)

     * @param aIns list that will be populated with scoring ids

     */

    void GetViewScoringIdsL( RArray<TUid>& aIds ) const;

    /**

     * Get view scoring id for collection plugin

     * @param naviState Path to represent navigational state

     * @return scoding id

     */

    TUid GetViewScoringIdForCollectionPlugin( const CMPXCollectionPath& aNaviState ) const;

    /**

     * Get view scoring id for depth in ui hierarchy

     * @param naviState Path to represent navigational state

     * @return scoding id

     */

    TUid ViewScoringIdForNaviStateDepth( const CMPXCollectionPath& aNaviState ) const;

    /**

     * Requesting OOM to Free Some Memory, so that photos can Start

     * @return Error if Memory Cannot be freed else Error None

     */

    TInt OOMRequestFreeMemoryL( TInt aBytesRequested) ;

    /**

     * Finds Current Memory Availability And Decides to Send a Request for freeing the memory 

     * @param aCriticalMemoryRequired Bare Minimum to start photos 

     * @return Error Code from OOM

     */

    TInt ReserveMemoryL(TInt aCriticalMemoryRequired);

    /**

     * Finds Current Minimum Required memory to start photos 

     * @param Type of application invokation 

     * @return Required Critical Memory

     */

    TInt RamRequiredInBytesL(TEntryType aType);

    /**

     * @todo:

     * Get view scoring id for depth in ui hierarchy

     * @param naviState Path to represent navigational state

     * @return scoding id

     */

    void ReserveMemoryL(TEntryType aType);

    //OOM

    /*

    *Invoked by the OOM framwork when photos app needs to free memory for other applications.

    */

    void StartCleanupL();

    //OOM

    /*

    *Invoked by the OOM framwork when photos app needs to free memory for other applications.

    */

    void StopCleanupL();

	/**

     * Check for updates via IAD.

     */

    void DoCheckForIADUpdatesL();

    /**

     * close photos app.

     */

     void ClosePhotosL();

private:

    MMPXViewUtility* iViewUtility;

    CAknGlobalNote* iGlobalWaitNote;

    TInt iNoteId;

    HBufC* iFreeMemText;

    /// Singleton that stores gallery's navigational state

    CGlxNavigationalState* iNavigationalState;

    /** Optional view plugin UID to activate when the collection is opened */

    TUid iStartupViewUid;

    /** Optional activation parameter for the next view */

    HBufC* iActivationParam;

    TBool iFocusLostLowMemory;

    TBool iStartUpSequence;

    ///Ui utility

    CGlxUiUtility* iUiUtility;

    /// Central repository entry for app (owned)

    CRepository* iRepository;

    /**

     * IAD updater class

     */

    CGlxIadUpdate* iIadUpdate;

    /**

    *This flag to chk whether red key has been pressed

    */

    TBool iEndKeyPressed;

    /**

     *Timer to check for IAD updates 30 seconds after application startup.

     */

     CPeriodic* iPeriodic ;

     /**

      * Flag to filter any spurious EPathChanged event from MPX Collection f/w.

      */     

     TBool iStateChangeRequested;

} ;

#endif // C_GLXWERAPPUI_H