dirscraccview3.cpp

symbian平台上如何在屏幕上快速的显示图片

/*
* ============================================================================
*  Name     : CDirScrAccView3 from DirScrAccView3.h
*  Part of  : DirScrAcc
*  Created  : 20.11.2002 by Forum Nokia
*  Implementation notes:
*        This class defines the view 3, which demonstrates combination of 
*  Direct Screen API and drawing directly to the frame buffer. 
*  Note that the clipping region is not taken care of here. You need to handle
*  that yourself.
*        Initial content was generated by Nokia Series 60 AppWizard.
*  Version  : 1.0
*  Copyright: Nokia Corporation
* ============================================================================
*/

// INCLUDE FILES
#include  <aknviewappui.h>
#include  <avkon.hrh>
#include  <DirScrAcc.rsg>
#include  "DirScrAccView3.h"
#include  "DirScrAccContainer3.h" 
#include  "DirScrAcc.hrh"


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

// ---------------------------------------------------------
// CDirScrAccView3::ConstructL(const TRect& aRect)
// Symbian two-phased constructor
// ---------------------------------------------------------
//
void CDirScrAccView3::ConstructL()
    {
    BaseConstructL( R_DIRSCRACC_VIEW3 );
    iContainer = 0;
    }

// ---------------------------------------------------------
// CDirScrAccView3::~CDirScrAccView3()
// Default destructor
// ---------------------------------------------------------
//
CDirScrAccView3::~CDirScrAccView3()
    {
    if ( iContainer )
        {
        AppUi()->RemoveFromViewStack( *this, iContainer );
        }

    delete iContainer;
    }

// ---------------------------------------------------------
// TUid CDirScrAccView3::Id()
// This returns the view ID
// ---------------------------------------------------------
//
TUid CDirScrAccView3::Id() const
    {
    return KView3Id;
    }

// ---------------------------------------------------------
// CDirScrAccView3::HandleCommandL(TInt aCommand)
// Here we handle commands for this view. 
// Each view has their own HandleCommandL()
// ---------------------------------------------------------
//
void CDirScrAccView3::HandleCommandL(TInt aCommand)
    {   
    switch ( aCommand )
        {        
        case EAknSoftkeyBack:
            {
            AppUi()->HandleCommandL(EEikCmdExit);
            break;
            }
        case EAknSoftkeyOk:
            {
            if(iContainer->IsDrawing())
                iContainer->StopDrawing();
            else
                iContainer->StartDrawingL();
            break;
            }               
        default:
            {
            AppUi()->HandleCommandL( aCommand );
            break;
            }
        }
    }

// ---------------------------------------------------------
// CDirScrAccView3::HandleClientRectChange()
// ---------------------------------------------------------
//
void CDirScrAccView3::HandleClientRectChange()
    {
    if ( iContainer )
        {
        iContainer->SetRect( ClientRect() );
        }
    }

// ---------------------------------------------------------
// CDirScrAccView3::DoActivateL(...)
// This is called when a view needs to be activated. 
// This creates container with its controls.
// ---------------------------------------------------------
//
void CDirScrAccView3::DoActivateL(
   const TVwsViewId& /*aPrevViewId*/,TUid /*aCustomMessageId*/,
   const TDesC8& /*aCustomMessage*/)
    {
   
    // Create Container
    if (!iContainer)
        {
        iContainer = new (ELeave) CDirScrAccContainer3;
        iContainer->SetMopParent(this);
        // use the applicationrect (fullscreen) for drawing
        iContainer->ConstructL( AppUi()->ApplicationRect() );
        AppUi()->AddToStackL( *this, iContainer );
        }    

    }

// ---------------------------------------------------------
// CDirScrAccView3::HandleCommandL(TInt aCommand)
// This is called when a view needs to be deactivated. 
// This destroys container with its controls.
// ---------------------------------------------------------
//
void CDirScrAccView3::DoDeactivate()
    {
    if ( iContainer )
        {
        AppUi()->RemoveFromViewStack( *this, iContainer );

        delete iContainer;
        iContainer = NULL;
        }
    }

// End of File