videocontainer.cpp

symbian video 的 实现

/*
* ============================================================================
*  Name     : CVideoContainer from VideoContainer.h
*  Part of  : Video
*  Created  : 10/14/2003 by Forum Nokia
*  Implementation notes:
*     Initial content was generated by Series 60 AppWizard.
*  Version  :
*  Copyright: Forum Nokia
* ============================================================================
*/

#include "VideoContainer.h"
#include <aknlists.h>
#include "FileList.hrh"
#include "FileListEngine.h"
#include "VideoAppUi.h"
#include <video.rsg>
#include <eikbtgpc.h>

const TInt KClientAreaScreenheight = 160;
const TInt KClientAreaScreenWidth = 176;

/*
-----------------------------------------------------------------------------

	void CVideoContainer::ConstructL(const TRect& aRect)

	Description: second phase constructor
	Comments   :

    Return values: N/A

-----------------------------------------------------------------------------
*/
void CVideoContainer::ConstructL(const TRect& aRect)
    {
    CreateWindowL();

	iListBox = new( ELeave ) CAknDoubleNumberStyleListBox();
	iListBox->SetContainerWindowL( *this );
	iListBox->ConstructL( this, EAknListBoxMarkableList);
	iListBox->CreateScrollBarFrameL(ETrue);
	iListBox->ScrollBarFrame()->SetScrollBarVisibilityL( CEikScrollBarFrame::EOff, 
			  CEikScrollBarFrame::EAuto);
    
	iListBox->Model()->SetOwnershipType( ELbmOwnsItemArray );
    iListBox->ActivateL();

	iAvkonAppUi->AddToStackL( iListBox );

	// Create the file list engine and prepare for listing all the files
	// in the Nokia video directory
	iFileListEngine = new (ELeave) CFileListEngine;
    SetFileList( EFileListVideos, EFileListDate );

    SetRect(aRect);
	iVideoRect = Rect();
	TPoint point = PositionRelativeToScreen();
	iVideoRect.iTl.iX += point.iX;
	iVideoRect.iTl.iY += point.iY;
	iVideoRect.iBr.iX += point.iX;
	iVideoRect.iBr.iY += point.iY;

	iVideoRect.Shrink( 1, 1 );

    ActivateL();
    }

/*
-----------------------------------------------------------------------------

	CVideoContainer::~CVideoContainer()

	Description: destructor
	Comments   :

    Return values: N/A

-----------------------------------------------------------------------------
*/
CVideoContainer::~CVideoContainer()
    {
	if ( iListBox )
		iAvkonAppUi->RemoveFromStack(iListBox);
	delete iListBox;
	delete iFileListEngine;
    }

/*
-----------------------------------------------------------------------------

	CVideoContainer::~CVideoContainer()

	Description: Called by framework when the view size is changed
	Comments   :

    Return values: N/A

-----------------------------------------------------------------------------
*/
void CVideoContainer::SizeChanged()
    {
	if ( iListBox )
		iListBox->SetExtent(TPoint(0,0),TSize(KClientAreaScreenWidth,KClientAreaScreenheight));
    }

/*
-----------------------------------------------------------------------------

	TInt CVideoContainer::CountComponentControls() const

	Description: Called by framework to return number of controls in the
			     container class.
	Comments   :

    Return values: Number of the controls in the container

-----------------------------------------------------------------------------
*/
TInt CVideoContainer::CountComponentControls() const
    {
	if ( iListBox )
		return 1;
	else
		return 0;
    }

/*
-----------------------------------------------------------------------------

	CCoeControl* CVideoContainer::ComponentControl(TInt aIndex ) const

	Description: Called by framework to control pointers according to index
	Comments   :

    Return values: CCoeControl pointer

-----------------------------------------------------------------------------
*/
CCoeControl* CVideoContainer::ComponentControl(TInt aIndex ) const
    {
    switch ( aIndex )
        {
        case 0:
            return iListBox;
        default:
            return NULL;
        }
    }

/*
-----------------------------------------------------------------------------

	void CVideoContainer::Draw(const TRect& aRect) const

	Description: Called by framework to draw the screen
	Comments   :

    Return values: N/A

-----------------------------------------------------------------------------
*/
void CVideoContainer::Draw(const TRect& aRect) const
    {
    CWindowGc& gc = SystemGc();
    gc.SetPenStyle( CGraphicsContext::ENullPen );
    gc.SetBrushColor( KRgbGray );
    gc.SetBrushStyle( CGraphicsContext::ESolidBrush );
    gc.DrawRect( aRect );
    }

/*
-----------------------------------------------------------------------------

	void CVideoContainer::HandleControlEventL(
		CCoeControl* aControl,TCoeEvent aEventType )

	Description: Called by framework to handle control event
	Comments   :

    Return values: N/A

-----------------------------------------------------------------------------
*/
void CVideoContainer::HandleControlEventL(
    CCoeControl* /*aControl*/,TCoeEvent /*aEventType*/)
    {
    }

/*
-----------------------------------------------------------------------------

	void CVideoContainer::SetFileList(TInt aDirectory, TInt aSizeDate)

	Description: set up filelist. Directory and Size can be changed. See 
				 Filelist.hrh for possible values. This function is located in 
				 the container and not in the engine, because it activates the 
				 listbox.Called by framework to handle control event.
	Comments   :

    Return values: N/A

-----------------------------------------------------------------------------
*/
void CVideoContainer::SetFileList(TInt aDirectory, TInt aSizeDate)
    {

    // Set the listbox to use the the file list model
    CDesCArray* items = static_cast<CDesCArray*>(iListBox->Model()->ItemTextArray());

    // If there are items, they will be removed here
    if (iFileListEngine->RemoveItems(items)) 
        {
        // This makes changes to the actual listbox
        iListBox->HandleItemRemovalL();  
        }

    // Let's show directory
    iFileListEngine->SetDirectory(aDirectory);  

    // Let's decide whether to show file size or modification date
    iFileListEngine->SetSizeDate(aSizeDate);

    // Do preparations for the FileList
    if(iFileListEngine->StartFileList() == KErrNone)
        {        
        // Create FileList Items in the ListBox
        iFileListEngine->GetFileListItems(items);       
        }
    // Close FileList session
    iFileListEngine->EndFileList();                  

    // Refresh the listbox due to model change
	iListBox->HandleItemAdditionL();
    iListBox->SetCurrentItemIndex(0);
    iListBox->DrawNow();
    }


/*
-----------------------------------------------------------------------------

	TKeyResponse CVideoContainer::OfferKeyEventL(
					const TKeyEvent& aKeyEvent,TEventCode aType)

	Description: Called by framework when a key is pressed
	Comments   :

    Return values: whether the key has been consumed or not.

-----------------------------------------------------------------------------
*/
TKeyResponse CVideoContainer::OfferKeyEventL(
    const TKeyEvent& aKeyEvent,TEventCode aType)
    {
    // See if we have a selection
    TInt code = aKeyEvent.iCode;
    switch( code )
        {
		// is navigator button pressed
    	case EKeyOK:
			{
			// During paused/playing state, pressing OK key should not replay 
			// the playing video clip
			if ( static_cast<CVideoAppUi*>iAvkonAppUi->GetVideoEngine( )->GetEngineState() ==
				 EPPlaying || static_cast<CVideoAppUi*>iAvkonAppUi->GetVideoEngine( )->GetEngineState() ==
				 EPPaused )
				 return EKeyWasConsumed;

			TFileName fileName;
            iFileListEngine->GetVideoFilePathAndNameAtPositon(iListBox->CurrentItemIndex(), fileName);
			static_cast<CVideoAppUi*>iAvkonAppUi->PlayVideoFileL( fileName );

			// Change the menu to "pause" and "Stop"
			iCba = CEikButtonGroupContainer::Current();

			if( iCba) 
				{
				iCba->SetCommandSetL( R_VIDEO_PAUSE_STOP );
				iCba->DrawNow();
				}

            return (EKeyWasConsumed);
            break;
			}

		case EKeyLeftArrow:
		case EKeyRightArrow:
		case EKeyUpArrow:
		case EKeyDownArrow:
			{
			// Just in case it refreshes the screen to flicker the screen during 
			// playing/paused when the key event is passed to the list box.
			if ( static_cast<CVideoAppUi*>iAvkonAppUi->GetVideoEngine( )->GetEngineState() ==
				 EPPlaying || static_cast<CVideoAppUi*>iAvkonAppUi->GetVideoEngine( )->GetEngineState() ==
				 EPPaused )
				 return EKeyWasConsumed;
			else
				return iListBox->OfferKeyEventL(aKeyEvent, aType);
			break;
			}

        default:
            // Let Listbox take care of its key handling
            return iListBox->OfferKeyEventL(aKeyEvent, aType);
            break;
        }
    }

/*
-----------------------------------------------------------------------------

	void CVideoContainer::GetCurrentVideoFileNameL(TDes &aFileName)

	Description: Get the current video file name.
	Comments   :

    Return values: N/A

-----------------------------------------------------------------------------
*/
void CVideoContainer::GetCurrentVideoFileNameL(TDes &aFileName)
	{
    iFileListEngine->GetVideoFilePathAndNameAtPositon(iListBox->CurrentItemIndex(), aFileName);
	}

/*
-----------------------------------------------------------------------------

	TInt CVideoContainer::GetNumOfItemsInListBox()

	Description: Get the total number of items in the listbox
	Comments   :

    Return values: number of items in the current list box

-----------------------------------------------------------------------------
*/
TInt CVideoContainer::GetNumOfItemsInListBox()
	{
    // Set the listbox to use the the file list model
    CDesCArray* items = static_cast<CDesCArray*>(iListBox->Model()->ItemTextArray());

	return items->Count();
	}