/*

* Copyright (c) 2005-2010 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:  Interface for controlling stylus popup menu.

*

*/

#include <AknPreviewPopUpController.h>

#include <eikmobs.h>

#include <AknUtils.h>

#include <barsread.h>

#include <aknlayoutscalable_avkon.cdl.h>

#include <eikapp.h>

#include <aknappui.h>

#include <AknDef.h>

#include "aknstyluspopupmenu.h"

#include "aknstyluspopupmenucontent.h"

const TInt KDefaultPopUpShowDelay = 0;

const TInt KDefaultPopUpHideDelay = 6000000; // 6 seconds

enum TStylusPopUpFlags

    {

    EIdleDisabled // usage of iControllerIdle is disabled 

    };

// ======== MEMBER FUNCTIONS ========

// ---------------------------------------------------------------------------

// Default constructor

// ---------------------------------------------------------------------------

//

CAknStylusPopUpMenu::CAknStylusPopUpMenu( MEikMenuObserver* aObserver, 

    const TPoint& aPoint,

    CAknPreviewPopUpController* aPopup ) 

    : iPosition ( aPoint ),

     iMenuObserver( aObserver ),

     iPreviewPopup( aPopup ),

     iPositionType( EPositionTypeLeftTop )

    {

    }

// ---------------------------------------------------------------------------

// CAknStylusPopUpMenu::ConstructL

// ---------------------------------------------------------------------------

//

void CAknStylusPopUpMenu::ConstructL()

    {

    iContent = CAknStylusPopUpMenuContent::NewL( *this );

    iContent->SetObserver(this); 

    }

// ---------------------------------------------------------------------------

// CAknStylusPopUpMenu::NewL

// ---------------------------------------------------------------------------

//

EXPORT_C CAknStylusPopUpMenu* CAknStylusPopUpMenu::NewL( 

                            MEikMenuObserver* aObserver, const TPoint& aPoint,

                            CAknPreviewPopUpController* aPopup )

    {

    CAknStylusPopUpMenu* self = CAknStylusPopUpMenu::NewLC( aObserver, 

                                                            aPoint,

                                                            aPopup );

    CleanupStack::Pop( self );

    return self;

    }

// ---------------------------------------------------------------------------

// CAknStylusPopUpMenu::NewL

// ---------------------------------------------------------------------------

//

EXPORT_C CAknStylusPopUpMenu* CAknStylusPopUpMenu::NewL( 

                            MEikMenuObserver* aObserver, const TPoint& aPoint )

    {

    CAknStylusPopUpMenu* self = CAknStylusPopUpMenu::NewLC( aObserver, 

                                                            aPoint, NULL );

    CleanupStack::Pop( self );

    return self;

    }

// ---------------------------------------------------------------------------

// CAknStylusPopUpMenu::NewLC

// ---------------------------------------------------------------------------

//

EXPORT_C CAknStylusPopUpMenu* CAknStylusPopUpMenu::NewLC(

                            MEikMenuObserver* aObserver, const TPoint& aPoint,

                            CAknPreviewPopUpController* aPopup )

    {

    CAknStylusPopUpMenu* self = new ( ELeave ) CAknStylusPopUpMenu( aObserver,

                                                                    aPoint,

                                                                    aPopup );

    CleanupStack::PushL( self );

    self->ConstructL();

    return self;

    }

// ---------------------------------------------------------------------------

// Destructor

// ---------------------------------------------------------------------------

//

CAknStylusPopUpMenu::~CAknStylusPopUpMenu()

    {

    if ( iContent )

        {

        iContent->SetObserver(NULL);

        }

    if ( iIsDeleted )

        {

        *iIsDeleted = ETrue;

        iIsDeleted = NULL;

        }

    if ( iControllerIdle )

         {

         iControllerIdle->Cancel();

         }

    delete iControllerIdle;

    delete iController;

    delete iContent;

    }

// ---------------------------------------------------------------------------

// CAknStylusPopUpMenu::AddMenuItemL

// ---------------------------------------------------------------------------

//

EXPORT_C void CAknStylusPopUpMenu::AddMenuItemL( const TDesC& aItem, 

                                                        const TInt aCommandId )

    {

    iContent->AddMenuItemL( aItem, aCommandId );

    }

// ---------------------------------------------------------------------------

// CAknStylusPopUpMenu::RemoveMenuItem

// ---------------------------------------------------------------------------

//

EXPORT_C void CAknStylusPopUpMenu::RemoveMenuItem( const TInt aCommandId )

    {

    iContent->RemoveMenuItem( aCommandId );

    }

// ---------------------------------------------------------------------------

// CAknStylusPopUpMenu::SetItemDimmed

// ---------------------------------------------------------------------------

//

EXPORT_C void CAknStylusPopUpMenu::SetItemDimmed( const TInt aCommandId, const TBool aDimmed )

    {

    iContent->SetItemDimmed( aCommandId, aDimmed );

    }

// ---------------------------------------------------------------------------

// CAknStylusPopUpMenu::ShowMenu

// ---------------------------------------------------------------------------

//

EXPORT_C void CAknStylusPopUpMenu::ShowMenu()

    {

    // if contoller exists, re-use it .

    if ( !iController )

        {

        TRAPD( err, 

               iController = CAknPreviewPopUpController::NewL( *iContent,

                       CAknPreviewPopUpController::ELayoutSubMenu | 

                       CAknPreviewPopUpController::EAutoMirror |

                       CAknPreviewPopUpController::EDontClose ) );

        if ( err )

            {

            return;

            }

        iController->SetPopUpShowDelay( KDefaultPopUpShowDelay );

        iController->SetPopUpHideDelay( KDefaultPopUpHideDelay );

        }

    TSize size(iController->Size());

    iController->ShowPopUp();

    if ( size.iWidth == 0 && size.iHeight == 0 )

        {

        if ( iPositionType != KErrNotFound )

            {

            SetPosition( iPosition, TPositionType( iPositionType ) );

            }

        else

            {

            SetPosition( iPosition );

            }        

        }

    else

        {

        //position already adjusted.

        iController->SetPosition( iPosition );

        }

    }

// ---------------------------------------------------------------------------

// CAknStylusPopUpMenu::SetPosition

// ---------------------------------------------------------------------------

//

EXPORT_C void CAknStylusPopUpMenu::SetPosition( const TPoint& aPoint )

    {

    SetPosition( aPoint, EPositionTypeLeftTop );

    }

// ---------------------------------------------------------------------------

// CAknStylusPopUpMenu::SetPosition 

// ---------------------------------------------------------------------------

//

EXPORT_C void CAknStylusPopUpMenu::SetPosition( const TPoint& aPoint,

                                                TPositionType aPosType )

    {

    TPoint adjustedPoint( aPoint );

    if ( !iController )

        {

        iPosition = aPoint;

        iPositionType = aPosType;

        return;

        }

    iController->UpdateContentSize(); 

    TSize menuSize = iController->Size();

	// Calculate the position to right-top corner by aPosType and

    // popup menu size. Add also a margin between the screen borders and the

    // popup if the popup is too close to screen border.

    TBool layoutMirrored( AknLayoutUtils::LayoutMirrored() );

    TRect screenRect;

    AknLayoutUtils::LayoutMetricsRect( AknLayoutUtils::EScreen,

                                       screenRect );

    // Margin is read from the popup window's layout data

    // (left parameter used).

    TAknWindowLineLayout popupWindowLayout(

        AknLayoutScalable_Avkon::popup_touch_menu_window( 0 ).LayoutLine() );

    TInt windowMargin = layoutMirrored ? popupWindowLayout.ir :

                                         popupWindowLayout.il;

    switch ( aPosType )	

        {

        case EPositionTypeRightTop:

            {

            break;

            }

        case EPositionTypeLeftTop:

            {

            if ( !layoutMirrored ) 

                {

                adjustedPoint.iX += menuSize.iWidth;

                }

            break;

            }

        case EPositionTypeRightBottom:

            {

            adjustedPoint.iY -= menuSize.iHeight;

            break;

            }

        case EPositionTypeLeftBottom:

            {

            if ( !layoutMirrored ) 

                {

                adjustedPoint.iX += menuSize.iWidth;

                }

            adjustedPoint.iY -= menuSize.iHeight;

            break;

            }

        default:

            {

            break;

            }

        }

    // Check if margins need to be added.

    TInt xLeftPos( layoutMirrored ? adjustedPoint.iX :

                                    adjustedPoint.iX - menuSize.iWidth );

    TInt xRightPos( layoutMirrored ? adjustedPoint.iX + menuSize.iWidth :

                                     adjustedPoint.iX );

    TInt xPosRightMargin( screenRect.iBr.iX - windowMargin );

    TInt xPosBottomMargin( screenRect.iBr.iY - windowMargin );

    if ( xLeftPos < windowMargin )

        {

        // Too close to the left side of the screen.

        adjustedPoint.iX = windowMargin + menuSize.iWidth;

        }

    else if ( xRightPos > xPosRightMargin )

        {

        // Too close to the right side of the screen.

        if ( layoutMirrored )

            {

            // In mirrored layout a left-top position must be provided

            // for the preview popup controller.

            adjustedPoint.iX = xPosRightMargin - menuSize.iWidth;

            }

        else

            {

            adjustedPoint.iX = xPosRightMargin;

            }

        }

    if ( adjustedPoint.iY < windowMargin )

        {

        // Too close to the top border of the screen.

        adjustedPoint.iY = windowMargin;

        }

    else if ( adjustedPoint.iY + menuSize.iHeight > xPosBottomMargin )

        {

        // Too close to the bottom border of the screen.

        adjustedPoint.iY = xPosBottomMargin - menuSize.iHeight;

        }

    iPosition = adjustedPoint;           

    iController->SetPosition( adjustedPoint ); 

    }

// ---------------------------------------------------------------------------

// CAknStylusPopUpMenu::ConstructFromResourceL

// ---------------------------------------------------------------------------

//

EXPORT_C void CAknStylusPopUpMenu::ConstructFromResourceL( TResourceReader&

                                                           aReader )

    {

    TInt count = aReader.ReadInt16();

    TInt commandId;

    for ( TInt i = 0; i < count; i++ )

        {

        TPtrC text = aReader.ReadTPtrC();

        commandId = aReader.ReadInt32();

        iContent->AddMenuItemL( text, commandId );

        aReader.ReadInt32(); // extension link

        }

    }

// ---------------------------------------------------------------------------

// From class MCoeControlObserver.

// Handles stylus tap events by forwarding the event to the observer.

// ---------------------------------------------------------------------------

//

EXPORT_C void CAknStylusPopUpMenu::HandleControlEventL( CCoeControl* aControl,

                                                        TCoeEvent aEventType )

    {

    if ( aControl && aEventType == EEventStateChanged )

        {

        if ( iPreviewPopup )

            {

            iPreviewPopup->HidePopUp();

            }

        if ( iController )

            {

            iController->HidePopUp();

            }

        if ( iMenuObserver )

            {

            TBool isAlreadySet = iFlags.IsSet( EIdleDisabled );

            iFlags.Set( EIdleDisabled );

            TBool isDeleted = EFalse;

            iIsDeleted = &isDeleted;

            iMenuObserver->ProcessCommandL( iContent->CurrentCommandId() );

            if ( isDeleted )

                {

                return;

                }

            iIsDeleted = NULL;

            if( !isAlreadySet )

                {

                iFlags.Clear( EIdleDisabled );

                }

            }

        StartControllerIdleL();

        }

    else if ( aControl && aEventType == EEventRequestExit )

        {

        if ( iPreviewPopup )

            {

            iPreviewPopup->HidePopUp();

            }

        if ( iController )

            {

            iController->HidePopUp();

            }      

        StartControllerIdleL();

        }

    else if ( aControl && aEventType == EEventRequestCancel )

        {

        if ( iMenuObserver )

            {

            TBool isAlreadySet = iFlags.IsSet( EIdleDisabled );

            iFlags.Set( EIdleDisabled );

            iMenuObserver->ProcessCommandL( KErrCancel );

            if( !isAlreadySet )

                {

                iFlags.Clear( EIdleDisabled );

                }

            }

        StartControllerIdleL();

        }

    }

// ---------------------------------------------------------------------------

// CAknStylusPopUpMenu::UpdatePosition

// ---------------------------------------------------------------------------

//

void CAknStylusPopUpMenu::UpdatePosition()

    {

	SetPosition( iPosition );

    }

// ---------------------------------------------------------------------------

// CAknStylusPopUpMenu::Clear

// ---------------------------------------------------------------------------

//

void CAknStylusPopUpMenu::Clear()

    {

    iContent->Clear();

    if ( iController )

        {

        iController->UpdateContentSize();

        }

    }

// -----------------------------------------------------------------------------

// CAknStylusPopUpMenu::StartControllerIdleL

// -----------------------------------------------------------------------------

//

void CAknStylusPopUpMenu::StartControllerIdleL()

    {

    if ( !iFlags.IsSet( EIdleDisabled ) )

        {

        if ( !iControllerIdle )

            {

            iControllerIdle = CIdle::NewL( CActive::EPriorityIdle );

            }

        if ( !iControllerIdle->IsActive() && iController )

             {

             iControllerIdle->Start( TCallBack( ControllerCallBack, this ) );

             }

        }

    }

// -----------------------------------------------------------------------------

// CAknStylusPopUpMenu::ControllerCallBack

// -----------------------------------------------------------------------------

//

TInt CAknStylusPopUpMenu::ControllerCallBack( TAny* aThis )

    {

    CAknStylusPopUpMenu* self = static_cast<CAknStylusPopUpMenu*>( aThis );

    self->RemoveController();

    self->iFlags.Clear( EIdleDisabled );

    return KErrNone;

    }

// -----------------------------------------------------------------------------

// CAknStylusPopUpMenu::RemoveController

// -----------------------------------------------------------------------------

//

void CAknStylusPopUpMenu::RemoveController()

    {

    if ( iController )

        {

        delete iController;

        iController = NULL;

        }

    }