change.cpp

实现了图像的切换效果,包括飞入飞出,雨滴效果,水平交错,百页窗效果,是symbian学习的好例子.

/*
============================================================================
 Name		: change.cpp
 Author	  : pizi
 Version	 :
 Copyright   : Your copyright notice
 Description : Cchange implementation
============================================================================
*/

#include "change.h"

Cchange::Cchange() : CActive( EPriorityStandard )	// Standard priority
{
}

Cchange* Cchange::NewLC()
{
	Cchange* self = new ( ELeave ) Cchange();
	CleanupStack::PushL( self );
	self->ConstructL();
	return self;
}

Cchange* Cchange::NewL()
{
	Cchange* self = Cchange::NewLC();
	CleanupStack::Pop(); // self;
	return self;
}

void Cchange::ConstructL()
{
	User::LeaveIfError( iTimer.CreateLocal() );	// Initialize timer
	CActiveScheduler::Add( this );				// Add to scheduler
}

Cchange::~Cchange()
{
	Cancel(); // Cancel any request, if outstanding
	iTimer.Close(); // Destroy the RTimer object
	// Delete instance variables if any
}

void Cchange::DoCancel()
{
	iTimer.Cancel();
}

void Cchange::StartL( TTimeIntervalMicroSeconds32 aDelay )
{
	Cancel();							// Cancel any request, just to be sure
	iState = EUninitialized;
	iTimer.After( iStatus, aDelay );	// Set for later
	SetActive();						// Tell scheduler a request is active
}

void Cchange::RunL()
{
	if ( iState == EUninitialized ) 
	{
		// Do something the first time RunL() is called
		iState = EInitialized;
	} 
	else if ( iState != EError ) 
	{
		// Do something
	}
	iTimer.After( iStatus, 1000000 );	// Set for 1 sec later
	SetActive();					// Tell scheduler a request is active
}

TInt Cchange::RunError( TInt aError )
{
	return aError;
}