/*

* 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:    Implementation of list view

*

*/

// INCLUDE FILES

#include "glxlistviewimp.h"

#include "glxpreviewthumbnailbinding.h"

#include <mpxcollectionutility.h>

#include <mpxcollectionpath.h>

#include <glxcollectiongeneraldefs.h>

#include <ganes/HgDoubleGraphicListFlat.h>

#include <ganes/HgItem.h>

#include <data_caging_path_literals.hrh>

#include <glxuistd.h>

#include <glxicons.mbg>

#include <gulicon.h>

#include <AknsBasicBackgroundControlContext.h>

#include <mglxmedialist.h>					//MGlxMediaList

#include <glxtracer.h>

#include <glxlog.h>							//Glx Logs

#include <glxlistviewplugin.rsg>

#include <aknViewAppUi.h>

#include <StringLoader.h>					//StringLoader		

#include <glxsetappstate.h>

#include <glxthumbnailattributeinfo.h>

#include <glxcollectionpluginalbums.hrh>

const TInt KListDataWindowSize(25);

const TInt KNoOfPages(2);

const TInt KBufferTresholdSize(6);

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

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

// C++ default constructor can NOT contain any code that might leave.

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

//

CGlxListViewImp::CGlxListViewImp(TInt aViewUid, const TListViewResourceIds& aResourceIds):        

        iViewUid(aViewUid),

        iResourceIds(aResourceIds)  

    {

    }

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

// Two-phased constructor.

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

//

CGlxListViewImp* CGlxListViewImp::NewL(MGlxMediaListFactory* aMediaListFactory,

                                       TInt aViewUid, 

                                       const TListViewResourceIds& aResourceIds,                                        

                                       const TDesC& aTitle)

    {

    TRACER("CGlxListViewImp::NewL");

    CGlxListViewImp* self = CGlxListViewImp::NewLC(aMediaListFactory, aViewUid,

                                                                aResourceIds, aTitle);			

    CleanupStack::Pop(self);

    return self;

    }

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

// Two-phased constructor.

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

//

CGlxListViewImp* CGlxListViewImp::NewLC(MGlxMediaListFactory* aMediaListFactory,

                                        TInt aViewUid, 

                                        const TListViewResourceIds& aResourceIds,                                         

                                        const TDesC& aTitle)

    {	

    TRACER("CGlxListViewImp::NewLC");

    CGlxListViewImp* self = new (ELeave) CGlxListViewImp(aViewUid, aResourceIds);

    CleanupStack::PushL(self);

    self->ConstructL(aMediaListFactory, aTitle);

    return self;

    }

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

// Symbian 2nd phase constructor can leave.

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

// 

void CGlxListViewImp::ConstructL(MGlxMediaListFactory* aMediaListFactory, 

                                                            const TDesC& aTitle)

    {

    TRACER("CGlxListViewImp::ConsrtuctL");

    BaseConstructL(iResourceIds.iViewId);

    ViewBaseConstructL();

    MLViewBaseConstructL(aMediaListFactory, aTitle);

    CAknToolbar* toolbar = Toolbar();

    if(toolbar)

        {

        toolbar->DisableToolbarL(ETrue);  

        }

    //Register the view to recieve toolbar events. ViewBase handles the events    

    SetToolbarObserver(this);

    iBackwardNavigation = EFalse;

    }

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

// Destructor

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

//

CGlxListViewImp::~CGlxListViewImp()

    {    

    TRACER("CGlxListViewImp::~CGlxListViewImp");

    delete iTitletext;  

    }

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

// ControlGroupId

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

//

TInt CGlxListViewImp::ControlGroupId() const

    {

    TRACER("CGlxListViewImp::ControlGroupId()");

    return reinterpret_cast<TInt>(this);

    }

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

// From CAknView

// Returns views id.

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

//

TUid CGlxListViewImp::Id() const

    {

    TRACER("CGlxListViewImp::Id()");

    return TUid::Uid(iViewUid);

    }

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

// From CAknView

// Handles a view activation.

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

//

void CGlxListViewImp::DoMLViewActivateL(const TVwsViewId& /* aPrevViewId */, 

        TUid /* aCustomMessageId */, const TDesC8& /* aCustomMessage */)

    {

    TRACER("CGlxListViewImp::DoMLViewActivateL");  

    iNextViewActivationEnabled = ETrue;

    if(StatusPane())

        {

        StatusPane()->MakeVisible(ETrue);

        CEikStatusPane* statusPane = iEikonEnv->AppUiFactory()->StatusPane();

        CAknTitlePane* titlePane = ( CAknTitlePane* )statusPane->ControlL(

                TUid::Uid( EEikStatusPaneUidTitle ));     

        const TDesC* titletext = titlePane->Text();

        HBufC* temptitle = titletext->AllocLC();

        TPtr titleptr = temptitle->Des();

        titleptr.Trim();

        if(!temptitle->Length())

            {

            if( iTitletext )

                {

                // Set the required Title

                titlePane->SetTextL( *iTitletext );

                }

            }

        CleanupStack::PopAndDestroy(temptitle);        

        }

	GlxSetAppState::SetState(EGlxInListView);

    // Separate contexts so that some attributes are loaded before others

    iTitleAttributeContext = CGlxDefaultAttributeContext::NewL();

    iTitleAttributeContext->SetRangeOffsets( KListDataWindowSize, 

            KListDataWindowSize );

    iTitleAttributeContext->AddAttributeL( KMPXMediaGeneralTitle );

    iSubtitleAttributeContext = CGlxDefaultAttributeContext::NewL();

    iSubtitleAttributeContext->SetRangeOffsets( KListDataWindowSize, 

            KListDataWindowSize );

    iSubtitleAttributeContext->AddAttributeL( 

            KGlxMediaCollectionPluginSpecificSubTitle );

    iMediaList->AddContextL( iTitleAttributeContext, KMaxTInt );

    iMediaList->AddContextL( iSubtitleAttributeContext, KMaxTInt );

	iMediaList->AddMediaListObserverL(this);

    TRect apRect = iEikonEnv->EikAppUi()->ApplicationRect();

    iBgContext = CAknsBasicBackgroundControlContext::NewL( 

            KAknsIIDQsnBgScreen,apRect,ETrue);

    if(iUiUtility->ViewNavigationDirection() == EGlxNavigationBackwards )

        {

        iBackwardNavigation = ETrue;

        }

    iPreviewTNBinding = CGlxPreviewThumbnailBinding::NewL(*this);

    CreateListL();

    if (iPreviewTNBinding)

        {

        iPopulateListTNs  = ETrue;

        CMPXCollectionPath* path = iMediaList->PathLC( 

                NGlxListDefs::EPathFocusOrSelection );

        iPreviewTNBinding->HandleItemChangedL(*path, 

        CleanupStack::PopAndDestroy( path );        

        }

    }

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

// From CAknView

// View deactivation function.

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

//

void CGlxListViewImp::DoMLViewDeactivate()

    {   

    TRACER("CGlxListViewImp::DoMLViewDeactivate");  

    if(StatusPane())

       {

       if(iTitletext)

                  {

                  delete iTitletext;

                  iTitletext = NULL;

                  }

       CEikStatusPane* statusPane = iEikonEnv->AppUiFactory()->StatusPane();

       TRAP_IGNORE(CAknTitlePane* titlePane = ( CAknTitlePane* )statusPane->ControlL(

               TUid::Uid( EEikStatusPaneUidTitle ));        

       iTitletext = titlePane->Text()->AllocL());

       }

    iMediaList->RemoveContext( iTitleAttributeContext );

   	delete iTitleAttributeContext;

   	iTitleAttributeContext = NULL;

    iMediaList->RemoveContext( iSubtitleAttributeContext );

   	delete iSubtitleAttributeContext;

   	iSubtitleAttributeContext = NULL;

	iMediaList->RemoveMediaListObserver( this );

	delete iPreviewTNBinding;

	iPreviewTNBinding = NULL;

	DestroyListViewWidget();

	}

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

// Destroys the Widget

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

//

void CGlxListViewImp::DestroyListViewWidget()

	{

	TRACER("CGlxListViewImp::DestroyListViewWidget");

    if (iList)

        {

   	    AppUi()->RemoveFromStack(iList);

        delete iList;

        iList = NULL;

        }

	delete iBgContext;

	iBgContext = NULL;

	if(iUiUtility->ViewNavigationDirection() == EGlxNavigationBackwards )

		{

		iLastFocusedIndex = 0;

		}

	}

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

// From CGlxViewBase

// Command handling function.

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

//

TBool CGlxListViewImp::HandleViewCommandL(TInt aCommand)

    {

	TRACER("CGlxListViewImp::HandleViewCommandL");  

    if (aCommand == EAknCmdOpen)

    	{

    	//Navigational State to be used

        if( iNextViewActivationEnabled ) 

            {

            iNextViewActivationEnabled = EFalse;

            iUiUtility->SetViewNavigationDirection(EGlxNavigationForwards); 

            //Navigate to the next view

            CMPXCollectionPath* path =

            iMediaList->PathLC( NGlxListDefs::EPathFocusOrSelection );

            iCollectionUtility->Collection().OpenL(*path);

            CleanupStack::PopAndDestroy(path);  

            }

        return ETrue;

    	}

    else

    	{

    	return EFalse;

    	}

    }

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

//  Called by the framework when the application status pane

//  size is changed.  Passes the new client rectangle to the

//  AppView

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

//

void CGlxListViewImp::HandleStatusPaneSizeChange ( )

    {

    if ( iBgContext )

        {

        TRect apRect = iEikonEnv->EikAppUi()->ApplicationRect();

        iBgContext->SetRect( apRect );

        }

    if(iList)

        {

        TRAP_IGNORE (iList->InitScreenL(ClientRect()); )

        }

    }

TTypeUid::Ptr CGlxListViewImp::MopSupplyObject(TTypeUid aId)

	{   

    if (iBgContext)

    	{

        return MAknsControlContext::SupplyMopObject(aId, iBgContext );

    	}

    return CAknView::MopSupplyObject(aId);

	}

void CGlxListViewImp::Request(TInt aRequestStart, TInt aRequestEnd, 

        THgScrollDirection /*aDirection*/)

    {

    TRACER("CGlxListViewImp::Request");

    //Doing this to avoid codescanner warning.

    TRAP_IGNORE(RequestL(aRequestStart, aRequestEnd));    

    }

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

// RequestL

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

//

void CGlxListViewImp::RequestL(TInt aRequestStart, TInt aRequestEnd)

    {

    TRACER("CGlxListViewImp::RequestL()");

    TInt mediaCount = iMediaList->Count();

    GLX_LOG_INFO1("CGlxListViewImp::RequestL - mediaCount(%d)", mediaCount);

    if(mediaCount<=0)

        {

        return;

        }

    TInt visIndex = iList->FirstIndexOnScreen();

    aRequestStart = (aRequestStart < 0 ? 0 : aRequestStart) ;

    aRequestEnd = (aRequestEnd >= mediaCount ? (mediaCount-1) : aRequestEnd);

    GLX_LOG_INFO3("CGlxListViewImp::RequestL - aRequestStart(%d), "

       "aRequestEnd(%d), visIndex(%d)", aRequestStart, aRequestEnd, visIndex);

    if (visIndex >= mediaCount )

        {

        visIndex = mediaCount-1;

        }

    if (visIndex < 0 || mediaCount <= 0)

        {

        visIndex = 0;

        }

    for (TInt i=aRequestStart; i<= aRequestEnd; i++)

        {

        const TGlxMedia& item = iMediaList->Item(i);

        iList->ItemL(i).SetTitleL(item.Title());

        iList->ItemL(i).SetTextL(item.SubTitle());

        }

    iList->RefreshScreen(visIndex);

    if ( visIndex != iLastFocusedIndex && !iPopulateListTNs)

        {

        GLX_LOG_INFO1("CGlxListViewImp::RequestL - SetFocusL()"

                " iPopulateListTNs(%d)", iPopulateListTNs);      

        GLX_LOG_INFO1("CGlxListViewImp::RequestL - SetFocusL()"

                " visIndex(%d)", visIndex);

        iPopulateListTNs = ETrue;

        iStartIndex = KErrNotFound;

        iMediaList->SetFocusL(NGlxListDefs::EAbsolute, visIndex);

        }

    }

void CGlxListViewImp::Release(TInt /*aBufferStart*/, TInt /*aBufferEnd*/)

    {

    TRACER("CGlxListViewImp::Release");

    }

void CGlxListViewImp::HandleSelectL( TInt aIndex )

    {

    TRACER("CGlxListViewImp::HandleSelectL");

    if(0 <= aIndex && aIndex < iMediaList->Count())

    	{

    	iPopulateListTNs = EFalse;

    	iMediaList->SetFocusL(NGlxListDefs::EAbsolute, aIndex);			

    	}

    }

void CGlxListViewImp::HandleOpenL( TInt aIndex )

    {

    TRACER("CGlxListViewImp::HandleOpenL");

	if( iNextViewActivationEnabled && ( aIndex >= 0 && aIndex < 

	        iMediaList->Count()))

	    {

        iMediaList->SetFocusL(NGlxListDefs::EAbsolute,aIndex);

        iLastFocusedIndex = iMediaList->FocusIndex();

	    iNextViewActivationEnabled = EFalse;

        iUiUtility->SetViewNavigationDirection(EGlxNavigationForwards); 

        //Navigate to the next view

        CMPXCollectionPath* path =

             iMediaList->PathLC( NGlxListDefs::EPathFocusOrSelection );

        iCollectionUtility->Collection().OpenL(*path);

        CleanupStack::PopAndDestroy(path);  

	    }

    }

void CGlxListViewImp::PreviewTNReadyL(CFbsBitmap* aBitmap, CFbsBitmap* 

    {

    TRACER("CGlxListViewImp::PreviewTNReadyL");

    iPreviewTNBinding->StopTimer();

	TInt focusIndex = iMediaList->FocusIndex();

    TInt mediaCount = iMediaList->Count();

    if (aBitmap)

	    {	

	    iList->ItemL(focusIndex).SetIcon(CGulIcon::NewL(aBitmap));

	    }

    else

    	{

    	//Displays default thumbnail if aBitmap is NULL 

    	TFileName resFile(KDC_APP_BITMAP_DIR);

		resFile.Append(KGlxIconsFilename);

		CFbsBitmap* defaultBitmap = AknIconUtils::CreateIconL(resFile,

						 EMbmGlxiconsQgn_prop_image_notcreated);

		AknIconUtils::SetSize(defaultBitmap, 

				CHgDoubleGraphicListFlat::PreferredImageSize());

    	iList->ItemL(focusIndex).SetIcon(CGulIcon::NewL(defaultBitmap));

    	}

    TInt firstIndex = iList->FirstIndexOnScreen();

    TInt itemsOnScreen = iList->ItemsOnScreen();

    TInt lastOnScreen = firstIndex + itemsOnScreen - 1;

    if (lastOnScreen > (mediaCount - 1))

	    {

		lastOnScreen = mediaCount;	    	

	    }

    if (!iPopulateListTNs || focusIndex == lastOnScreen)

        {

        GLX_DEBUG2("CGlxListViewImp::PreviewTNReadyL()"

               " RefreshScreen - focusIndex(%d)", focusIndex);        

		iList->RefreshScreen(focusIndex);

	    } 

	if (iPopulateListTNs)

		{

		if(iStartIndex == KErrNotFound)

			{

			iStartIndex = focusIndex;

			}

		TInt count = iMediaList->Count();

		if(count)

		    {

            TInt focus = (focusIndex+1)%count;

            if (focus != iStartIndex)

                {

                iMediaList->SetFocusL(NGlxListDefs::EAbsolute, focus);			

                }

            else

                {

                iPopulateListTNs = EFalse;	

                // iStartIndex holds the focus index of the item.

                // If the focus is not on 0th index and if USB is Connected/Disconnected

                // or some files are deleted from file manager, 

                // Once the updation of all items is done, the focus should be set to

                // previous focus index(not to 0th index). 

                iMediaList->SetFocusL(NGlxListDefs::EAbsolute, 

                		iStartIndex);

                iList->SetSelectedIndex(iStartIndex);

                iList->RefreshScreen(iStartIndex);

                iStartIndex = KErrNotFound;

                /* The medialist doesn't give the callback for focuschanged if the count is one.

                 * So we have to explicitly start the timer of 2 seconds after populating the list 

                 * TN's ie., after gettting the first thumbnail.

                 * The callback is not given because the setfocus index is same as the focused index