twophase.cpp

《基于symbian os的手机开发与应用》

// TwoPhase.cpp
//
// Copyright (c) 2005 NIIT ChengDu. All rights reserved.

// Example shows two phase construction. 

// version 1.0

// written by hewei

// date: 10-10-2005

// NOTE: the structure of this example is different to standard E32 examples


#include <e32cons.h>

  // All messages written to this
LOCAL_D CConsoleBase* console;

// Function prototypes
 void callExampleL();
 void doExampleL();


//////////////////////////////////////////////////////////////////////////////
//
// -----> CDate (definition)
//
// The class is used by the example code
//
//////////////////////////////////////////////////////////////////////////////
class CDate : public CBase
	{
public:
	static CDate* NewLC(TInt aYear,TInt aMonth,TInt aDate,CConsoleBase* aConsole);
	static CDate* NewL(TInt aYear,TInt aMonth,TInt aDate,CConsoleBase* aConsole);
public :
	TInt IsLeapYear();
	void Print();
private:
	CDate(TInt aYear,TInt aMonth,TInt aDate,CConsoleBase* aConsole);
public :
	TInt iYear;
	TInt iMonth;
	TInt iDate;
	CConsoleBase* iConsole;
	};


//////////////////////////////////////////////////////////////////////////////
//
// -----> CDate (implementation)
//
//////////////////////////////////////////////////////////////////////////////
CDate* CDate::NewLC(TInt aYear,TInt aMonth,TInt aDate,CConsoleBase* aConsole)
{
	CDate* date=NewL(aYear,aMonth,aDate, aConsole);
	CleanupStack::PushL(date);
	return date;
}
CDate* CDate::NewL(TInt aYear,TInt aMonth,TInt aDate,CConsoleBase* aConsole)
{
	CDate* self=new (ELeave)CDate(aYear,aMonth,aDate, aConsole);
	return self;
}
CDate::CDate(TInt aYear,TInt aMonth,TInt aDate,CConsoleBase* aConsole)
{
	iYear=aYear;
	iMonth=aMonth;
	iDate=aDate;
	iConsole=aConsole;
}
void CDate::Print()
{
	_LIT(KDateFormat,"%d/%d/%d\n");
	iConsole->Printf(KDateFormat,iMonth,iDate,iYear);
}
TInt CDate::IsLeapYear()
{
	_LIT(KISLEAPYEAR,"%d is a leap year\n");
	_LIT(KISNOTLEAPYEAR,"%d is not a leap year\n");
	if(iYear%4==0&&iYear%100!=0||iYear%400==0)
	{
      iConsole->Printf(KISLEAPYEAR,iYear);
	  return 1;
	}
    else
	{
      iConsole->Printf(KISNOTLEAPYEAR,iYear);
	  return 0;
	}

}

//////////////////////////////////////////////////////////////////////////////
//
// -----> CFullTime (definition)
//
// The class is used by the example code
//
//////////////////////////////////////////////////////////////////////////////
class CFullTime :CBase
{
  public:
	  static CFullTime* NewL(TInt aHour,TInt aMinute,TInt aSecond,TInt aYear,TInt aMonth,TInt aDate,CConsoleBase* aConsole);
	  static CFullTime* NewLC(TInt aHour,TInt aMinute,TInt aSecond,TInt aYear,TInt aMonth,TInt aDate,CConsoleBase* aConsole);
  private:
	  CFullTime(TInt aHour,TInt aMinute,TInt aSecond);
	  void ConstructL(TInt aYear,TInt aMonth,TInt aDate,CConsoleBase* aConsole);
  public:
	  void Print();
	  ~CFullTime();
  private:
	  TInt iHour;
	  TInt iSecond;
	  TInt iMinute;
	  CDate* iDate;
	  CConsoleBase* iConsole;
};
//////////////////////////////////////////////////////////////////////////////
//
// -----> CFullTime (implement)
//
// The class is used by the example code
//
//////////////////////////////////////////////////////////////////////////////
CFullTime* CFullTime::NewL(TInt aHour,TInt aMinute,TInt aSecond,TInt aYear,TInt aMonth,TInt aDate,CConsoleBase* aConsole)
{
	CFullTime* self=new (ELeave)CFullTime(aHour,aMinute,aSecond);
	self->ConstructL(aYear,aMonth,aDate,aConsole);
	return self;
}
CFullTime* CFullTime::NewLC(TInt aHour,TInt aMinute,TInt aSecond,TInt aYear,TInt aMonth,TInt aDate,CConsoleBase* aConsole)
{
	CFullTime* self=CFullTime::NewL(aHour,aMinute,aSecond,aYear,aMonth,aDate,aConsole);
	CleanupStack::PushL(self);
	return self;
}
CFullTime::CFullTime(TInt aHour,TInt aMinute,TInt aSecond)
{
	iHour=aHour;
	iMinute=aMinute;
	iSecond=aSecond;
}
void CFullTime::ConstructL(TInt aYear,TInt aMonth,TInt aDate,CConsoleBase* aConsole)
{
	iDate=CDate::NewLC(aYear,aMonth,aDate,aConsole);
	iConsole=aConsole;
	CleanupStack::Pop(iDate);
}
void CFullTime::Print()
{
	_LIT(KTimeFormat,"%d:%d:%d\n");
    iDate->Print();
	iConsole->Printf(KTimeFormat,iHour,iMinute,iSecond);
	iDate->IsLeapYear();
}
CFullTime::~CFullTime()
{
	delete iDate;
}

//////////////////////////////////////////////////////////////////////////////
//
// Main function called by E32
//
//////////////////////////////////////////////////////////////////////////////
GLDEF_C TInt E32Main()
    {
	  // Get cleanup stack
	CTrapCleanup* cleanup=CTrapCleanup::New();

	 // Some more initialization, then do the example
    TRAPD(error,doExampleL());
  // callExampleL() should never leave.
	_LIT(KMsgPanicEpoc32ex,"EPOC32EX");
	__ASSERT_ALWAYS(!error,User::Panic(KMsgPanicEpoc32ex,error));

  // destroy the cleanup stack
	delete cleanup;
 // return
	return 0;
    }


//////////////////////////////////////////////////////////////////////////////
//
//doExampleL() and CallExampleL();
//
//////////////////////////////////////////////////////////////////////////////
void doExampleL()
{
  	//Get Console;
	_LIT(KMsgExampleCode,"Symbian OS Example Code");
	console = Console::NewL(KMsgExampleCode,TSize(KConsFullScreen,KConsFullScreen));
		// Put console onto the cleanup stack.
	CleanupStack::PushL(console);

	int error;
	TRAP(error,callExampleL());
	//TRAPD(error,callExampleL());
    if(error)
	{
		_LIT(KERROR,"error occured!\n");
		console->Printf(KERROR);
	}
	else{
      _LIT(KNOLEAVE,"No Leave!\n");
		console->Printf(KNOLEAVE);
	}
	console->Getch();
		// Remove the console object from the cleanupstack
	  // and destroy it. 	
	CleanupStack::PopAndDestroy();
}

void callExampleL() 
    {
	//pointer to CFullTime object.
	CFullTime* fulltime=CFullTime::NewLC(14,10,22,2005,10,10,console) ;
    //print message of CFullTime.
	fulltime->Print();
	CleanupStack::PopAndDestroy();
}