btobjectexchangeappview.cpp

This C++ code example provides a method for transferring objects or chunks of data from one device

/* Copyright (c) 2004, Nokia. All rights reserved */


// INCLUDE FILES
#include "BTObjectExchangeAppView.h"
#include "BTObjectExchange.pan"
#include "BTObjectExchangeAppUi.h"

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

// ----------------------------------------------------------------------------
// CBTObjectExchangeAppView::NewL()
// Two-phased constructor.
// ----------------------------------------------------------------------------
//
CBTObjectExchangeAppView* CBTObjectExchangeAppView::NewL( const TRect& aRect )
    {
    CBTObjectExchangeAppView* self = CBTObjectExchangeAppView::NewLC( aRect );
    CleanupStack::Pop( self );
    return self;
    }

// -----------------------------------------------------------------------------
// CBTObjectExchangeAppView::NewLC()
// Two-phased constructor.
// -----------------------------------------------------------------------------
//
CBTObjectExchangeAppView* CBTObjectExchangeAppView::NewLC( const TRect& aRect )
    {
    CBTObjectExchangeAppView* self = new ( ELeave ) CBTObjectExchangeAppView;
    CleanupStack::PushL( self );
    self->ConstructL( aRect );
    return self;
    }

// -----------------------------------------------------------------------------
// CBTObjectExchangeAppView::ConstructL()
// Symbian 2nd phase constructor can leave.
// -----------------------------------------------------------------------------
//
void CBTObjectExchangeAppView::ConstructL( const TRect& aRect )
    {
    // Create a window for this application view
    CreateWindowL();

    // Set the windows size
    SetRect( aRect );

    // Create a control to display a list of messages
    iListBox = new ( ELeave ) CAknSingleNumberStyleListBox;
    iListBox->SetContainerWindowL( *this );
    iListBox->ConstructL( this, 0 );
    
    iListBox->SetRect( aRect.Size() );

    iListBox->ActivateL();
    iListBox->CreateScrollBarFrameL( ETrue );
    iListBox->ScrollBarFrame()->SetScrollBarVisibilityL( 
        CEikScrollBarFrame::EOn, CEikScrollBarFrame::EAuto );

    // Create an array to hold the messages
    iMessageList = new ( ELeave ) CDesCArrayFlat( 10 );

    // Give it to the control
    CTextListBoxModel* model = iListBox->Model();
    model->SetItemTextArray( iMessageList );

    // transfer ownership of iMessageList
    model->SetOwnershipType( ELbmOwnsItemArray ); 

    // Activate the window, which makes it ready to be drawn
    ActivateL();
    }

// ----------------------------------------------------------------------------
// CBTObjectExchangeAppView::CBTObjectExchangeAppView()
// Constructor.
// ----------------------------------------------------------------------------
//
CBTObjectExchangeAppView::CBTObjectExchangeAppView()
: iMsgIndex( 0 )
    {
    // No implementation required.
    }

// ----------------------------------------------------------------------------
// CBTObjectExchangeAppView::~CBTObjectExchangeAppView()
// Destructor.
// ----------------------------------------------------------------------------
//
CBTObjectExchangeAppView::~CBTObjectExchangeAppView()
    {
    // iMessageList is not deleted as it is owned by iListBox->Model()
    delete iListBox;
    iListBox = NULL;
    }

// ----------------------------------------------------------------------------
// CBTObjectExchangeAppView::CountComponentControls()
// Return the number of component controls.
// ----------------------------------------------------------------------------
//
TInt CBTObjectExchangeAppView::CountComponentControls() const
    {
    return 1; // Only have one Component
    }

// ----------------------------------------------------------------------------
// CBTObjectExchangeAppView::ComponentControl()
// Gets the specified component of a compound control.
// ----------------------------------------------------------------------------
//
CCoeControl* CBTObjectExchangeAppView::ComponentControl( TInt aIndex ) const
    {
    __ASSERT_ALWAYS( aIndex == 0, 
        Panic( EBTObjectExchangeInvalidControlIndex ) );
    return iListBox;
    }

// ----------------------------------------------------------------------------
// CBTObjectExchangeAppView::OfferKeyEventL()
// Offer the key event to the list box.
// ----------------------------------------------------------------------------
//
TKeyResponse CBTObjectExchangeAppView
::OfferKeyEventL( const TKeyEvent& aKeyEvent, TEventCode aType )
    {
    //capture keyevent, if it is 'OK' key then get current
    //text and try to launch the file using document handler
	if ( aType == EEventKey )
	{
		switch ( aKeyEvent.iScanCode )
		{
			case 167: //joystick key press
				{
				TPtrC16 textRow = (*iMessageList)[iListBox->CurrentItemIndex()];
				//The row of text is like '1\ttest.txt'
				TInt tabIndex = textRow.Find(KTabulator) + 2;
				TPtrC fileName = textRow.Right( textRow.Length() - tabIndex + 1 );
				if ( HandleJoystickPressL(fileName) )
				   return EKeyWasConsumed;
				}
		};
	}

  
    return iListBox->OfferKeyEventL( aKeyEvent, aType );
    }

// ----------------------------------------------------------------------------
// CBTObjectExchangeAppView::LogL( const TDesC& aText )
// Add an entry to the log.
// ----------------------------------------------------------------------------
//
void CBTObjectExchangeAppView::LogL( const TDesC& aText )
    {
    LogL( aText, KNullDesC );
    }

// ----------------------------------------------------------------------------
// CBTObjectExchangeAppView::LogL( const TDesC& aText, TInt aNumber )
// A number to append onto the entry.
// ----------------------------------------------------------------------------
//
void CBTObjectExchangeAppView::LogL( const TDesC& aText, TInt aNumber )
    {
    TBuf<KMaxTIntLen> numberString;

    numberString.Num( aNumber );

    LogL( aText, numberString );
    }
    

// ----------------------------------------------------------------------------
// CBTObjectExchangeAppView::LogL( const TDesC& aText, const TDesC& aExtraText)
// Extra text to append onto the entry.
// ----------------------------------------------------------------------------
//
void CBTObjectExchangeAppView::LogL( const TDesC& aText, 
                                     const TDesC& aExtraText )
    {
    HBufC* buffer = HBufC::NewLC( KMessageHeaderLen + aText.Length() + 
                    aExtraText.Length() );

    buffer->Des().Num( ++iMsgIndex );
    buffer->Des().Append( '\t' );
    buffer->Des().Append( aText );
    buffer->Des().Append( aExtraText );

    // add the message to the list
    iMessageList->AppendL( *buffer );
    CleanupStack::PopAndDestroy( buffer );

    // tell the control about the change
    iListBox->HandleItemAdditionL();
    
    //Set last item current so the recently added log is visible
    iListBox->SetCurrentItemIndex ( iMessageList->Count()-1 );
    
    DrawDeferred();
    }

// ----------------------------------------------------------------------------
// CBTObjectExchangeAppView::ClearMessageListL()
// Clears all the entries in the list view.
// ----------------------------------------------------------------------------
//
void CBTObjectExchangeAppView::ClearMessageListL()
    {
    iMessageList->Reset();

    iListBox->HandleItemRemovalL();
    iListBox->Reset();

    iMsgIndex = 0;
    }

// ----------------------------------------------------------------------------
// CBTObjectExchangeAppView::ContainsEntries()
// Does the view contain any log entries.
// ----------------------------------------------------------------------------
//
TBool CBTObjectExchangeAppView::ContainsEntries()
    {
    return iListBox->Model()->NumberOfItems() != 0;
    }

TBool CBTObjectExchangeAppView::HandleJoystickPressL(TDesC& aLine)
    {
    CBTObjectExchangeAppUi * appui = static_cast<CBTObjectExchangeAppUi *> (CCoeEnv::Static()->AppUi() );
    return appui->HandleJoystickPressL(aLine);
    }

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

// End of File