examples/AppFramework/BmpAnim/BmpAnimGui_AppView.cpp

// Copyright (c) 2006-2009 Nokia Corporation and/or its subsidiary(-ies).
// All rights reserved.
// License: "Symbian Foundation License v1.0" to Symbian Foundation
// members and "Symbian Foundation End User License Agreement v1.0"
// to non-members at the URL
// "http://www.symbianfoundation.org/legal/licencesv10.html".
//
// Initial Contributors:
// Nokia Corporation - initial contribution.
//
// Contributors:
//
// Description:
// BmpAnimGuiAppView.cpp
//

#include "BmpAnimGui.h"

        
// Animate the balls such that they move across the screen in a sinusoidal pattern
void CExampleAppView::LoadMbmL( const TDesC& aMbmFile )
        {
        // Construct BitmapAnimClientData 
        if( !iAnimFrames )
                {
                CFbsBitmap* bitmap;
                CFbsBitmap* mask;
                CBitmapFrameData* frameGeneral;
                iAnimFrames = CBitmapAnimClientData::NewL();
                CleanupStack::PushL( iAnimFrames );
                
                iX = KColorBallsAnimXDeflectionStart;
                TInt ballIndex = KColorBallsMbmFirstBallIndex;
                
                while( iX < KColorBallsAnimXDeflectionTerminalValue )
                        {
                        // Load the image
                        bitmap = new (ELeave) CFbsBitmap();
                        CleanupStack::PushL( bitmap );
                        User::LeaveIfError( bitmap->Load(aMbmFile, ballIndex) );                
                        ballIndex = ( KColorBallsMbmLastBallIndex == ballIndex ) ? KColorBallsMbmFirstBallIndex : ballIndex + 1;
                                
                        // Load the mask
                        mask = new (ELeave) CFbsBitmap();
                        CleanupStack::PushL( mask );
                        User::LeaveIfError( mask->Load(aMbmFile, KColorBallsMbmMaskIndex) );            
                                
                        // Calculate the y deflection
                        iY =TInt( KColorBallsAnimYDeflectionOffset + KColorBallsAnimYDeflectionMultiplier*sin( iX ));   
                                
                        // Construct the frame
                        frameGeneral = CBitmapFrameData::NewL( bitmap, mask, KColorBallsAnimFrameDelay, TPoint(iX, iY) );
                        CleanupStack::PushL( frameGeneral );
                                
                        // Add it to the sequence
                        iAnimFrames->AppendFrameL( frameGeneral );
                                
                        // Popping order- mask, bitmap, iFrameGeneral
                        CleanupStack::Pop( 3 ); 
                                
                        iX += KColorBallsAnimXDeflectionIncrement;
                        }
                        
                iBitmapAnimPlayer.SetBitmapAnimDataL( *iAnimFrames );
                CleanupStack::Pop( iAnimFrames );
                }
        }       
        
CExampleAppView::CExampleAppView()
: iBitmapAnimPlayer( iAnimDll ),iAnimDll( iEikonEnv->WsSession() )
  
        {
        }

CExampleAppView* CExampleAppView::NewL(const TRect& aRect)
        {
        CExampleAppView* self = new(ELeave) CExampleAppView();
        CleanupStack::PushL(self);
        self->ConstructL(aRect);
        CleanupStack::Pop();
        return self;
        }

CExampleAppView::~CExampleAppView()
        {
        iBitmapAnimPlayer.Close();
        delete( iAnimFrames );
        iAnimDll.Close();
        delete iExampleText;
        }


// Standard initialisation for a window-owning control.
void CExampleAppView::ConstructL(const TRect& aRect)
        {
        // Fetch the text from the resource file.
        iExampleText = iEikonEnv->AllocReadResourceL( R_EXAMPLE_TEXT_BB );
        
        // The control is window-owning.
        CreateWindowL();
        
        // Extent of the control. 
        SetRect(aRect);
        
        // The control is ready to draw, so notify the UI framework.
        ActivateL();
        
        // Some animation preamble.
        _LIT(KDllName, "BMPANSRV.DLL" );
        User::LeaveIfError( iAnimDll.Load( KDllName ) );
        iBitmapAnimPlayer.ConstructL( Window() );
        
        LoadMbmL( KColorBallsMbmPath ); 
        }       
        
                                          

// Draws the view with a simple outline rectangle 
void CExampleAppView::Draw(const TRect& /*aRect*/) const
        {
        // Window graphics context
        CWindowGc& gc = SystemGc();
        
        // Area in which we shall draw
        TRect drawRect = Rect();
        
        // The font used for drawing the text
        const CFont* fontUsed;
        
        // Clear the screen
        gc.Clear();
            
        // Use the title font supplied by the UI
        fontUsed = iEikonEnv->TitleFont();
        gc.UseFont(fontUsed);
        
        // Draw the text in the rectangle and discard the font.
        TInt   baselineOffset=(drawRect.Height() - fontUsed->HeightInPixels())/5; 
        gc.DrawText(*iExampleText,drawRect,baselineOffset,CGraphicsContext::ECenter, 0);
        gc.DiscardFont();               
        }

        
        







        
        

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