updateao.cpp

一款大砖块的游戏

/*
* ============================================================================
*  Name     : CUpdateAO from UpdateAO.cpp
*  Part of  : Mopoid
*  Created  : 16.01.2004 by Andreas Jakl / Mopius - http://www.mopius.com/
*  Description:
*     Regularly updates the game view (if the game is active).
*  Version  : 1.02
*  Copyright: 
*     'Mopoid' is free software; you can redistribute
*     it and/or modify it under the terms of the GNU General Public License
*     as published by the Free Software Foundation; either version 2 of
*     the License, or (at your option) any later version.
* 
*     'Mopoid' is distributed in the hope that it
*     will be useful, but WITHOUT ANY WARRANTY; without even the implied
*     warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
*     See the GNU General Public License for more details.
* 
*     You should have received a copy of the GNU General Public License
*     along with 'Mopoid'; if not, write to the Free Software
*     Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
* ============================================================================
*/

#include "UpdateAO.h"

CUpdateAO::CUpdateAO(MUpdateAOCallback &aOwningObj, TInt aPriority)
	: CActive(aPriority), iOwningObj(aOwningObj)
{
}

CUpdateAO::~CUpdateAO()
{
	Cancel();
}

CUpdateAO* CUpdateAO::NewL(MUpdateAOCallback &owningObj, TInt aPriority)
{
	CUpdateAO * self = new (ELeave) CUpdateAO(owningObj, aPriority);

	CActiveScheduler::Add(self);

	return(self);
}


void CUpdateAO::Start(void)
{
	// reactivate in ActiveScheduler queue
	Reactivate();
}

void CUpdateAO::Reactivate(void)
{
	if (!IsActive())
	{
//		User::After(0); shouldn't be necessary -- basically gives other Active Objs a chance

		SetActive();

	// The following two lines simulate a request completion
	// as if it were generated by a server. This completion will
	// be processed by the active scheduler. If other events have
	// completed belonging to higher-priority active objects, those
	// will get processed first. Otherwise, our RunL() function
	// will get called, allowing us to perform the next step in
	// the calculation.
		TRequestStatus* status = &iStatus;	// iStatus inherited from CActive
		User::RequestComplete(status, KErrNone);
	}
}

void CUpdateAO::RunL(void)
{
	// do main loop!
	TBool callAgain = iOwningObj.RepeatedAction();

	// reinsert in ActiveScheduler queue
	if (callAgain)
		Reactivate();
}

void CUpdateAO::DoCancel(void)
{
	iOwningObj.CancelAsyncs();
}

// End of File