vrexlistcontainer.cpp

symbian s60 有关音频的代码实例,供参考

/*
* ============================================================================
*  Name     : CVRexListContainer from VRexListContainer.cpp
*  Part of  : Video Example
*  Created  : 30/08/2006 by Forum  Nokia
*  Implementation notes:
*  Version  : 2.0
*  Copyright: Nokia Corporation, 2006
* ============================================================================
*/

// INCLUDE FILES
#include <avkon.hrh>
#include <aknlists.h>

#include "VRexListContainer.h"
#include "VRexApp.h"
#include "VRexListView.h"
#include "VRexFileDetailsDialog.h"

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

// ---------------------------------------------------------
// CVRexListContainer::ConstructL(const TRect& aRect)
// EPOC two phased constructor
// ---------------------------------------------------------
//
void CVRexListContainer::ConstructL(const TRect& aRect, CVRexListView* aView, 
    CVRexEngine* aEngine)
    {
 	iEngine = aEngine;
    iView = aView;

    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->SetListBoxObserver(this);

    iListBox->ActivateL();

	iAvkonAppUi->AddToStackL(iListBox);

	// Get the file list of clips in video gallery
	UpdateFileListL();

	SetRect(aRect);
    ActivateL();
    }

// Destructor
CVRexListContainer::~CVRexListContainer()
    {
     if(iListBox)
		{
		iAvkonAppUi->RemoveFromStack(iListBox);
		delete iListBox;
		iListBox = NULL;
		}
    }

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

	void CVRexListContainer::UpdateFileListL()

	Description: This method updates file list in list box.
	Comments   :

    Return values: N/A

-----------------------------------------------------------------------------
*/
void CVRexListContainer::UpdateFileListL()
	{
	SetFileListL(EFileListVideos, EFileListDate);
	}

// ---------------------------------------------------------
// CVRexListContainer::SizeChanged()
// Called by framework when the view size is changed
// ---------------------------------------------------------
//
void CVRexListContainer::SizeChanged()
    {
 	if(iListBox)
		{
		iListBox->SetRect(Rect());
		}
    }

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

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

// ---------------------------------------------------------
// CVRexListContainer::Draw(const TRect& aRect) const
// ---------------------------------------------------------
//
void CVRexListContainer::Draw(const TRect& aRect) const
    {

    CWindowGc& gc = SystemGc();
    gc.SetPenStyle( CGraphicsContext::ENullPen );
    gc.SetBrushColor( KRgbGray );
    gc.SetBrushStyle( CGraphicsContext::ESolidBrush );
    gc.DrawRect( aRect );
    }

// ---------------------------------------------------------
// CVRexListContainer::HandleControlEventL(
//     CCoeControl* aControl,TCoeEvent aEventType)
// ---------------------------------------------------------
//
void CVRexListContainer::HandleControlEventL(
    CCoeControl* /*aControl*/,TCoeEvent /*aEventType*/)
    {
    // Add your control event handler code here
    }

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

	void CVRexListContainer::SetFileListL(TInt aDirectory, TInt aSizeDate)

	Description: This method sets directory listing to list box.
	Comments   :

    Return values: N/A

-----------------------------------------------------------------------------
*/
void CVRexListContainer::SetFileListL(TInt aDirectory, TInt aSizeDate)
    {
    // Set the listbox to use the the file list model
    CDesCArray* items = 
        static_cast<CDesCArray*>(iListBox->Model()->ItemTextArray());

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

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

    // Do preparations for the file list
    if(iEngine->StartFileList() == KErrNone)
        {
        // Create file list items in the list box
        iEngine->GetFileListItemsL(items);
        }
    // Close file server session
    iEngine->EndFileList();

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


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

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

	Description: This method handles key events.
	Comments   :

    Return values: TKeyResponse

-----------------------------------------------------------------------------
*/
TKeyResponse CVRexListContainer::OfferKeyEventL(
    const TKeyEvent& aKeyEvent,TEventCode aType)
    {

    // See if we have a selection
    TInt code = aKeyEvent.iCode;
    switch(code)
        {
		case EKeyUpArrow:
		case EKeyDownArrow:
			{
	        // Let list box take care of its key handling
			return iListBox->OfferKeyEventL(aKeyEvent, aType);
			}

        default:
        	break;
        }
    return EKeyWasNotConsumed;
    }

// ---------------------------------------------------------
// CVRexListContainer::HandleListBoxEventL(CEikListBox *aListBox,
//										TListBoxEvent aEventType)
// ---------------------------------------------------------
//
void CVRexListContainer::HandleListBoxEventL(CEikListBox */*aListBox*/, 
    TListBoxEvent aEventType)
    {
	if (GetNumOfItemsInListBox()==0)
		return;

	if(aEventType == EEventEnterKeyPressed)
		{
		iView->HandleCommandL(EVRexCmdAppPlay);
		}
    }

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

	void CVRexListContainer::GetCurrentVideoFileNameL(TDes &aFileName)

	Description: This method gets the current video file name.
	Comments   :

    Return values: N/A

-----------------------------------------------------------------------------
*/
void CVRexListContainer::GetCurrentVideoFileNameL(TDes &aFileName)
	{
	iEngine->GetVideoFilePathAndNameAtPosition(iListBox->CurrentItemIndex(), 
        aFileName);
	}

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

	TInt CVRexListContainer::GetNumOfItemsInListBox()

	Description: This method gets the total number of items in the list box.
	Comments   :

    Return values: Number of items

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

	return items->Count();
	}

// End of file