/*

* 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:  Toolbar extension component

*

*/

#include <barsread.h>

#include <akntoolbarextension.h>

#include <avkon.mbg>

#include <aknconsts.h>

#include <akntoolbar.h>

#include "akntoolbarextensionview.h"

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

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

// Two-phased constructor.

// Constructs an extension with graphics

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

//

CAknToolbarExtension* CAknToolbarExtension::NewL()

    {

    CAknToolbarExtension* self = new (ELeave) CAknToolbarExtension();

    CleanupStack::PushL( self );

    self->BaseConstructL();

    CleanupStack::Pop( self );

    return self;

    }

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

// Two-phased constructor.

// Constructs an extension with graphics

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

//

EXPORT_C CAknToolbarExtension* CAknToolbarExtension::NewL( const TInt aResourceId )

    {

    CAknToolbarExtension* self = NewLC( aResourceId );

    CleanupStack::Pop( self );

    return self;

    }

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

// Two-phased constructor.

// Constructs an extension with graphics

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

//

EXPORT_C CAknToolbarExtension* CAknToolbarExtension::NewLC( const TInt aResourceId )

    {

    CAknToolbarExtension* self = new (ELeave) CAknToolbarExtension();

    CleanupStack::PushL( self );

    self->BaseConstructL();

    self->ConstructFromResourceL( aResourceId ); 

    return self;

    }

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

// Destructor

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

//

CAknToolbarExtension::~CAknToolbarExtension()

    {

    delete iView;

    if ( iIdle && iIdle->IsActive() )

        {

        iIdle->Cancel(); 

        }

    delete iIdle; 

    }

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

// From class CAknButton.

// Constructs the toolbar extension and creates the extension view

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

//

void CAknToolbarExtension::ConstructFromResourceL( TResourceReader& aReader )

    {

    TInt version = aReader.ReadInt8();     // version

    iFlags = aReader.ReadInt32();    // flags

    if ( iFlags & KAknTbExtensionButtonNoFrame )

        {

        SetButtonFlags( KAknButtonNoFrame ); 

        }

    if ( version > 0 )

        {

        TPtrC txt = aReader.ReadTPtrC();

        CAknButtonState* state = State( 0 );

        if ( state )

            {

            state->SetHelpTextL( txt );

            }

        state = State( 1 );

        if ( state )

            {

            state->SetHelpTextL( txt );

            }

        if ( version >= 2 )

            {

            // bmpfile

            TPtrC bmpFile = aReader.ReadTPtrC();

            // bmpid & bmpmask

            TInt bmpId = aReader.ReadInt16();

            TInt maskId = aReader.ReadInt16();

            TAknsItemID id;     

            TInt major = aReader.ReadInt32();

            TInt minor = aReader.ReadInt32();

            if ( major != 0 && minor != 0 )

                {

                id.Set( major, minor ); 

                }

            else if ( bmpFile == KNullDesC || ( bmpId == -1 && maskId == -1 ) )                    

                {

                // To be sure that there will be at least some icon

                id.Set( KAknsIIDQgnIndiTbExtension );

                }

            // dimmed bitmaps

            TInt dimmedBmpId = aReader.ReadInt16();

            TInt dimmedMaskId = aReader.ReadInt16();

            major = aReader.ReadInt32();

            minor = aReader.ReadInt32();

            TAknsItemID dimmedId;     

            if ( major != 0 && minor != 0 )

                {

                dimmedId.Set( major, minor ); 

                }

            // pressed bitmaps

            TInt pressedBmpId = aReader.ReadInt16();

            TInt pressedMaskId = aReader.ReadInt16();

            TAknsItemID pressedId;     

            major = aReader.ReadInt32();

            minor = aReader.ReadInt32();

            if ( major != 0 && minor != 0 )

                {

                pressedId.Set( major, minor ); 

                }

            TBool useNormalIcon = ETrue; // Use normal icon with state 1, if pressed icon does not exist.

            if ( ( bmpFile != KNullDesC && ( pressedBmpId != -1 && pressedMaskId != -1 ) ) 

                || ( major != 0 && minor != 0 ) )  

                {

                useNormalIcon = EFalse; 

                }

            // hover bitmaps

            TInt hoverBmpId = aReader.ReadInt16();

            TInt hoverMaskId = aReader.ReadInt16();

            TAknsItemID hoverId;     

            major = aReader.ReadInt32();

            minor = aReader.ReadInt32();

            if ( major != 0 && minor != 0 )

                {

                hoverId.Set( major, minor ); 

                }

            if ( state )

                {

                state->UpdateIconL( bmpFile, useNormalIcon ? bmpId : pressedBmpId, 

                    useNormalIcon ? maskId : pressedMaskId, dimmedBmpId, dimmedMaskId, 

                    pressedBmpId, pressedMaskId, hoverBmpId, hoverMaskId, 

                    useNormalIcon ? id : pressedId, dimmedId, pressedId, hoverId ); 

                }

            state = State( 0 ); 

            if ( state )

                {

                state->UpdateIconL( bmpFile, bmpId, maskId, dimmedBmpId, dimmedMaskId, 

                    pressedBmpId, pressedMaskId, hoverBmpId, hoverMaskId, id, dimmedId,

                    pressedId, hoverId ); 

                }

            }

        }

    // construct view from resource, items are standard TBAR_CTRL structures

    iView = CAknToolbarExtensionView::NewL( aReader, this );

    }

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

// From class CCoeControl.

// Handles key events

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

//

TKeyResponse CAknToolbarExtension::OfferKeyEventL( const TKeyEvent& aKeyEvent, 

    TEventCode aType )

    {

    if ( CAknButton::OfferKeyEventL( aKeyEvent, aType ) == EKeyWasNotConsumed )

        {

        return iView->OfferKeyEventL( aKeyEvent, aType );

        }

    return EKeyWasConsumed;

    }

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

// From class CCoeControl.

// Handles resource changes

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

//

void CAknToolbarExtension::HandleResourceChange( TInt aType )

    {

    CAknButton::HandleResourceChange( aType ); 

    iView->HandleResourceChange( aType ); 

    }

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

// From class CCoeControl.

// Makes extension visible

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

//

void CAknToolbarExtension::MakeVisible( TBool aVisible )

    {

    CAknButton::MakeVisible( aVisible ); 

    // When the view is changing the extension is hidden and then shown again 

    // when coming back to view. If extension button stays pressed down, the 

    // extension view should also be shown again. Showing the extension view

    // via idle so that it is shown on top. Otherwise applications container

    // is drawn after extension view, and because they have the same ordinal 

    // position and priority, only container would be shown.  

    if ( StateIndex() == 1 && aVisible )

        {

        ShowViewViaIdle();

        }

    else if ( !aVisible )

        {

        if ( iIdle && iIdle->IsActive() )

            {

            iIdle->Cancel(); 

            }

        iView->MakeVisible( aVisible ); 

        }

    }

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

// From class MCoeControlObserver.

// Handles events from itself and from extension view. 

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

//

void CAknToolbarExtension::HandleControlEventL( CCoeControl* aControl, 

    TCoeEvent aEventType )

    {

    switch ( aEventType )

        {

        case MCoeControlObserver::EEventRequestExit:

            {

            SetShown( EFalse ); // close view

            break;

            }

        case MCoeControlObserver::EEventStateChanged: 

            {

            if ( !iToolbar )

                {

                iToolbar = static_cast<CAknToolbar*>( Parent() ); 

                }

            if ( aControl == this )

                {

                if ( StateIndex() == 0 )

                    {

                    iView->MakeVisible( EFalse ); // close view

                    }

                else

                    {

                    TBool nonFocusing = iToolbar->IsNonFocusing(); 

                    iView->SetFocusing( !nonFocusing ); 

                    if ( IsVisible() )

                        {

                        iToolbar->DynInitExtensionL( this );

                        iView->MakeVisible( ETrue ); // show view

                        }

                    }

                }

            else

                {

                TInt commandId = iView->CommandIdByControl( aControl ); 

                iToolbar->ExtensionEventL( commandId ); 

                }

            break;     

            }

        default: 

            {

            break; 

            }

        }

    }

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

// Gets extension position so that extension view knows where to draw

// ifself 

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

//

TInt CAknToolbarExtension::ExtensionPosition( )

    {

    if ( !iToolbar )

        {

        iToolbar = static_cast<CAknToolbar*>(Parent()); 

        }

    return iToolbar->ToolbarVisibleIndexByControl( this ); 

    }

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

// Shows view via idle. This is needed when the extension is in pressed down

// state when coming back to view. 

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

//

void CAknToolbarExtension::ShowViewViaIdle()

    {

    if ( !iIdle )

        {

        TRAPD( err, iIdle = CIdle::NewL( CActive::EPriorityIdle ) );

        if ( err != KErrNone)

            {

            return; 

            }

        }

    if ( iIdle->IsActive() )

        {

        iIdle->Cancel();

        }

    iIdle->Start( TCallBack ( ShowView, this ) );

    }

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

// Shows view when called by idle.  

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

//

TInt CAknToolbarExtension::ShowView( TAny* aThis )

    {

    CAknToolbarExtension* extension = static_cast<CAknToolbarExtension*>(aThis);

    extension->iView->MakeVisible( ETrue );     

    return KErrNone; 

    }

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

// View uses this method to inform that it has closed ( a tap outside the

// view ) and then extension should change state, so that it does not look

// pressed down. 

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

//

void CAknToolbarExtension::ViewClosed( )

    {

    ChangeState( ETrue ); 

    }

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

// Returns a pointer to the specified control.

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

//

EXPORT_C CCoeControl* CAknToolbarExtension::ControlOrNull( TInt aCommandId ) const

    {

    return iView->ControlOrNull( aCommandId ); 

    }

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

// Adds new item to extension view

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

//

EXPORT_C void CAknToolbarExtension::AddItemL( CCoeControl* aItem,

                                              TInt aType,

                                              TInt aCommandId,

                                              TInt aFlags,

                                              TInt aIndex )

    {

    if ( iView->IsVisible() )

        {

        User::Leave( KErrNotSupported ); 

        }

    iView->AddItemL( aItem, aType, aCommandId, aFlags, aIndex ); 

    }

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

// Removes an item from extension view

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

//

EXPORT_C void CAknToolbarExtension::RemoveItemL( TInt aCommandId )

    {

    if ( iView->IsVisible() )

        {

        User::Leave( KErrNotSupported ); 

        }

    iView->RemoveItemL( aCommandId ); 

    }

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

// Return boolean indicating if extension view is shown. 

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

//

EXPORT_C TBool CAknToolbarExtension::IsShown() const

    {

    if ( iView->IsVisible() )

        {

        return ETrue; 

        }

    return EFalse; 

    }

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

// Sets extension view shown or hides it. 

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

//

EXPORT_C void CAknToolbarExtension::SetShown( TBool aShown )

    {

    if ( iView->IsVisible() != aShown )

        {

        iView->MakeVisible( aShown ); 

        ChangeState( ETrue ); 

        }

    }

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

// Getter for extension flags

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

//

TInt CAknToolbarExtension::ExtensionFlags()

    {

    return iFlags;     

    }

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

// Default constructor

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

//

CAknToolbarExtension::CAknToolbarExtension() : CAknButton( 0 ), iFlags(0)

    {

    }

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

// Contructs the button

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

//

void CAknToolbarExtension::BaseConstructL()

    {

    SetObserver( this );

    CAknButton::ConstructL( KAvkonBitmapFile, 

        -1, 

        -1,

        -1,

        -1,

        -1,

        -1,

        -1,

        -1,

        KNullDesC,

        KNullDesC,

        0, 

        KAknsIIDQgnIndiTbExtension

        ); // replace with parametrized version to load graphics etc

    AddStateL( KAvkonBitmapFile, 

        -1,

        -1,

        -1,

        -1,

        -1,

        -1,

        -1,

        -1,

        KNullDesC,

        KNullDesC,

        KAknButtonStateHasLatchedFrame, 

        KAknsIIDQgnIndiTbExtension, 

        KAknsIIDDefault, 

        KAknsIIDDefault,

        KAknsIIDDefault ); // add a second state with latched down graphics

    } 

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

// Constructs controls from a resource file.

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

//

void CAknToolbarExtension::ConstructFromResourceL( const TInt aResourceId ) 

    {    

    TResourceReader reader;

    iCoeEnv->CreateResourceReaderLC( reader, aResourceId );