/*

* 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:  Transition utilities.

*

*/

#ifndef __AKN_TRANSITION_UTILS_H__

#define __AKN_TRANSITION_UTILS_H__

#include <coemain.h>

#include <gfxtranseffect/gfxtranseffect.h>

class CRepository;

// Constants for component appear/disappear actions

const TInt KGfxControlAppearAction = 3;

const TInt KGfxControlDisappearAction = 4;

// Constants for the types of component effects

#define KGfxOptionsMenuControlUid TUid::Uid(0x10281F88)

#define KGfxOptionsMenuCascadeControlUid TUid::Uid(0x10281F89)

#define KGfxTouchToolbarControlUid TUid::Uid(0x10282E49)

#define KGfxToolbarControlUid TUid::Uid(0x10282E4A)

#define KGfxContextMenuControlUid TUid::Uid(0x10282E4C)

#define KGfxTaskSwapperControlUid TUid::Uid(0x10281F90)

#define KGfxNumberEntryPopupUid TUid::Uid( 0x10282E4D )

#define KGfxMediaBarControlUid TUid::Uid( 0x20007B17 )

#define KGfxErrorNoteControlUid TUid::Uid( 0x10282E50 )

#define KGfxWarningNoteControlUid TUid::Uid( 0x10282E51 )

#define KGfxInformationNoteControlUid TUid::Uid( 0x10282E52 )

#define KGfxConfirmationNoteControlUid TUid::Uid( 0x10282E53 )

#define KGfxWaitNoteControlUid TUid::Uid( 0x10282E54 )

#define KGfxQueryControlUid TUid::Uid( 0x10282E56 )

#define KGfxPopupDefaultControlUid TUid::Uid( 0x10282E57 )

#define KGfxSystemNotificationControlUid TUid::Uid( 0x2000B472 )

#define KGfxSystemNotifBatteryControlUid TUid::Uid( 0x2000B473 )

#define KGfxDiscreetPopupControlUid TUid::Uid( 0x2000B478 )

#define KGfxPreviewPopupControlUid TUid::Uid( 0x2000B479 )

#define KGfxSequenceFirstControlUid TUid::Uid( 0x2000B474 )

#define KGfxSequenceMiddleControlUid TUid::Uid( 0x2000B475 )

#define KGfxSequenceLastControlUid TUid::Uid( 0x2000B476 )

// Enumerations for notifying tfx server (used via 

// GfxTransEffect::NotifyExternalState)

enum TGfxTransNotification 

    {

    ENotifyGlobalAbort,

    ENotifySetExtent

    ,ECaptureComponentsBegin

    ,ECaptureComponentsEnd

    ,EBeginPopupSequence

    ,ELastPopupInSequence

    ,EEndPopupSequence

    ,EInternalHandleSequence

    // Get the type of the current transition.  Must be called during

    // a transition, ie. between Begin() and End().

    ,EGetRegistrationType

    ,ECaptureComponentsAbort

    ,EAddIgnoreWOChildComponent

    ,ERemoveIgnoreWOChildComponent

    };

// Enumeration for data that should be accessible globally. (cross-class)

// For local data, use this pointer or key > EUserDefinedKey

enum TAknTransitionUtilsDataKey

	{

	EDontAnimateBitmaps,

	EUserDefinedKey = 0xFFFF,

	};

// Constants for unique ID's to store values with SetData().

// These must not collide with pointers to controls, which are used as keys

// in some places, so starting from 1 is safe.

const TInt KScreensaverCallStateChange = 1;

const TUid KAknTransitionUtilsUid = { 0x10282E4B };

class CAknPsObserver;

NONSHARABLE_CLASS( MAknPsObserver )

    {

public:

    virtual void PsValueUpdated( const TUid aCategory, const TUint aKey,

                                 const TInt aVal ) = 0;

    };

/**

 * Transition callback interface.

 */

class MAknTransitionUtilsObserver

    {

public:

    virtual TInt AknTransitionCallback(TInt aEvent, TInt aState = 0, 

                                       const TDesC8* aParams = NULL) = 0;

	};

/**

 * Utility class for transition effects.

 *

 * There are three different kinds of utilities here:

 * 1. Callbacks for different transition related events.

 * 2. Temporary storage of arbitrary data, associated with a key.

 * 3. General transition related functions.

 *

 * The data storage functionality is useful when you need to pass data

 * between different parts of the code, and there is no natural way to

 * do it, eg. when doing control transitions with integration in 

 * components that aren't explicitly connected.  In this case a fitting

 * key would be a pointer to the CCoeControl.

 */

NONSHARABLE_CLASS( CAknTransitionUtils ) : public CCoeStatic, 

                                           public MGfxTransEffectObserver,

                                           public MAknPsObserver

    {

    public:

    /**

     * Types of events for which callbacks can be registered.

     */

    enum TEvents

        { 

        ENone = 0x0,

        /**

         * Changes in screen redirection.

         */

        EEventWsBufferRedirection = 0x1,

        /**

         * Component effect completion.

         */

        EEventControlTransitionFinished = 0x2

		};

    /**

     * Control type specification for CAknTransitionUtils::GetDemarcation().

     */

    enum TGfxControlType

        {

        EOptionsMenu,

        EPopup

        };

    enum TMakeVisibleSubComponentsInfo

        {

        EForceInvisible,

        EForceVisible,

        EDisappearInvisible,

        EAppearInvisible,

        EAppearVisible,

        EClearIgnored

        };

    ~CAknTransitionUtils();

    /**

     * Add an observer for transition events.  If the observer has already

     * been added, the events for which it is listening will be updated to

     * the new set of events passed in.

     *

     * @param aObserver The observer object.

     * @param aEvent The event(s) to listen to.  To register an observer

     *        for multiple events, the event flags should be OR-ed together.

     * @param aParams Extra parameters.  Not used with

     *        EEventWsBufferRedirection.  With EEventControlTransitionFinished,

     *        a pointer to the CCoeControl of the transition should be passed

     *        in, as this will be passed back to the observer in the callback.

     *        Send this pointer directly as the argument, cast to a 

     *        const TDesC8*.

     *

     * @return KErrNone on success, otherwise one of the other system-wide 

     *         error codes.

     */

    IMPORT_C static TInt AddObserver( MAknTransitionUtilsObserver* aObserver,

                                      TInt aEvents,

                                      const TDesC8* aParams = NULL );

    /**

     * Remove an observer for transition events.  The events specified are

     * significant: only the specified events will be removed.  If there are

     * no remaining events, the observer will be removed and the

     * actual observer object can be safely deleted.

     *

     * @param aObserver The observer to remove.

     * @param aEvent The event(s) that should be removed.

     *

     * @return KErrNone on success, otherwise one of the other system-wide

     *         error codes.

     */

    IMPORT_C static TInt RemoveObserver( MAknTransitionUtilsObserver* aObserver,

                                         TInt aEvents );

    /**

     * Get the state of the observed event.  This currently only applies to

     * window redirection, not to component transition completion.

     *

     * @param aEvent The event to check the state of.  Currently

     *        EEventWsBufferRedirection is the only valid alternative.

     * @param aState On return, the state is set.  For window redirection,

     *        this is 0 (false) if it's not redirected, and non-zero (true)

     *        if it is.

     * @param aParams Additional parameters.  Not currently used.

     *

     * @return KErrNone on success, otherwise one of the other system-wide

     *         error codes.

     */

    IMPORT_C static TInt GetState( TInt aEvent, TInt* aState, 

                                   TDes8* aParams = NULL);

    /**

     * Store arbitrary data, associated with a key.  Only one data pointer

     * can be stored per key, so if data has already been stored using aKey,

     * aData will be stored instead of the old data.

     *

     * @param aKey The key, which can be used to retrieve the data.

     * @param aData The data to store.

     *

     * @return KErrNone on success, otherwise one of the other

     *         system-wide error codes.

     */

    IMPORT_C static TInt SetData( const TInt aKey, TAny* aData );

    /**

     * Retrieve stored data, using its associated key.

     * 

     * @param aKey The key to which the data is associated.

     *

     * @return The data, or NULL on error.

     */

    IMPORT_C static TAny* GetData( const TInt aKey );

    /**

     * Remove stored data.  This does not free the stored data, just removes

     * it from storage, so that it can no longer be retrieved.  This should

     * be done when the data no longer needs to be retrieved, to free up

     * data internal to this class.

     *

     * @param aKey The key to which the data is associated.

     */

    IMPORT_C static void RemoveData( const TInt aKey );

    /**

     * Recursively sets all parents to the control tree.  Used by control

     * transition integration points to ensure that all controls will be

     * included in the transition.

     *

     * @param aControl The base (key) control of a control transition.

     */

    IMPORT_C static void SetAllParents( const CCoeControl* aControl );

    /**

     * Check if transition effects are enabled.

     *

     * @param aEffectCategory Specify which category of effects to inquire

     *        about.  The categories are specified in akntranseffect.h,

     *        (EFullScreenTransitionsOff etc.).

     *

     * @return ETrue if effects in the specified category are enabled, 

     *         EFalse if not.

     */

    IMPORT_C static TBool TransitionsEnabled( TInt aEffectCategory );

    /**

     * Set the visibility for all the subcomponents of a control.  NB: does

     * NOT set the visibility for the control itself (aControl).

     *

     * @param aControl The main control, whose subcomponents will have their

     *        visibility set.

     * @param aInfo EForceInvisible = Makes all window owning sub controls

     *                  invisible

     *             EForceVisible: Makes all window owning sub controls visible

     *             EDisappearInvisible: Makes all window owning sub controls

     *                  invisible

     *             EAppearInvisible: Makes all visible subcontrols invisible

     *                  (must be followed by a call using EAppearVisible or

     *                  EClearIgnored)

     *             EAppearVisible: Makes all controls visible that was made

     *                  invisible using argument EAppearInvisible

     *             EClearIgnored: Reset the list of controls that was added

     *                  to ignore list

     *

     * @return KErrNone on success, otherwise one of the system-wide error 

     *         codes.

     */

    IMPORT_C static TInt MakeVisibleSubComponents( CCoeControl* aControl, 

                                        TMakeVisibleSubComponentsInfo aInfo );

    /**

     * Get the demarcation rect for a specified component.  The demarcation

     * rect is the area where an appear transition should start, and a

     * disappear transition should end.  For example, for the options menu,

     * this would probably be the left softkey.  With the proper KML, this

     * could be used to give the impression that the options menu grows 

     * out from the left softkey.

     *

     * This function handles portrait and landscape mode transparently, so

     * the integration code should always get the appropriate demarcation

     * rect.

     *

     * @param aControlType The control type to get the demarcation for.

     * @param aRect On return, contains the resulting rect.

     *

     * @return KErrNone on success, otherwise one of the system-wide error

     *         codes.

     */

    IMPORT_C static TInt GetDemarcation( TGfxControlType aControlType, 

                                         TRect& aRect );

    private:

    CAknTransitionUtils();

    /**

     * Returns the AknTransitionUtils singleton.

     *

     * The AknTransitionUtils singleton, or NULL or error.

     */    

    static CAknTransitionUtils* Static();

    // From MGfxTransEffectObserver

    void TransitionFinished( const CCoeControl* aControl, 

                                      TUint aAction );

    // From MAknPsObserver

    void PsValueUpdated( const TUid aCategory, const TUint aKey,

                         const TInt aVal );

    void RemoveControlTransitionObserver( const TInt aKey );

    TInt MakeVisibleSubComponentsR( CCoeControl* aControl, 

                                    TMakeVisibleSubComponentsInfo aInfo );

private:

    struct TDataEntry;

    struct TTransitionObserver;

    RPointerArray<TDataEntry> iUserData;

    RPointerArray<TTransitionObserver> iObservers;

    TInt iNumControlTransitionObservers;

    CAknPsObserver* iPsObserver;

    TInt iNumPsObservers;

    TBool iScreenRedirected;

    CRepository* iRepository;

    RPointerArray<const CCoeControl> iIgnoredChildControls;

    };

#endif // __AKN_TRANSITION_UTILS_H__