simpleclock.cpp

Symbian 开发的网格控件

// SimpleClock.cpp
//
// Copyright (c) 2000 Symbian Ltd.  All rights reserved.

// Asynchronous keyboard processing with messenger program.
// A single CWriteKeyProcessor active object (derived from 
// class CActiveConsole) which accepts and prints keyboard
// input to a console.

#include "SimpleClock.h"


//////////////////////////////////////////////////////////////////////////////
//
// -----> CSimpleClock (implementation)
//
//////////////////////////////////////////////////////////////////////////////
CSimpleClock::CSimpleClock()
: CTimer(CActive::EPriorityStandard)
// Construct standard-priority active object
{
	iStop = FALSE;
	iObserver = NULL;
	
};


CSimpleClock* CSimpleClock::NewL()
{
	TTime tm;
	tm.UniversalTime();

	return CSimpleClock::NewL(tm);
}

CSimpleClock* CSimpleClock::NewLC(const TTime & aTime)
{
	CSimpleClock* self=new (ELeave) CSimpleClock();
	CleanupStack::PushL(self);
	self->ConstructL(aTime);
	return self;
}

CSimpleClock* CSimpleClock::NewL(const TTime & aTime)
{
	CSimpleClock* self = NewLC(aTime);
	CleanupStack::Pop();
	return self;
}

void CSimpleClock::ConstructL(const TTime & aTime)
{
	iTime = aTime;
		
	// Base class second-phase construction.
	CTimer::ConstructL();

	CActiveScheduler::Add(this); 
}


CSimpleClock::~CSimpleClock()
{
	// Make sure we're cancelled
	Cancel();
}

void CSimpleClock::DoCancel()
{
	// Base class
	CTimer::DoCancel(); 
}

void CSimpleClock::IssueRequest()
{
	if(IsActive())
		return;
	CTimer::After(900000);
}

void CSimpleClock::RunL()
{
	if (iStop == FALSE)
	{
		iTime += TTimeIntervalSeconds(1);
		TDateTime dt = iTime.DateTime();
		if(iObserver)
			iObserver->UpdateClock(iTime);
		IssueRequest();

	}
}

void CSimpleClock::Start()
{
	iTime.UniversalTime();
	iTime += TTimeIntervalHours(8);
	IssueRequest();
}