Archived:How can I determine when the battery is full using Symbian C++?

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Relevent to old versions of Symbian.

Article Metadata

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Compatibility

Platform(s): S60 1st Edition
S60 2nd Edition

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Article

Created: User:Technical writer 2 (12 Jan 2004)

Last edited: hamishwillee (06 May 2013)

Overview

How can I determine when the battery is full using Symbian C++?

Description

Create an observer class, derived from CActive, to listen for System Agent events:

class CSystemAgentObserver : public CActive
{
public: // Constructors and destructor
static CSystemAgentObserver* NewL( CApAppUi& aApAppUi );
virtual ~CSystemAgentObserver();
private:
void ConstructL( );
CSystemAgentObserver();
CSystemAgentObserver( CApAppUi& aApAppUi );
private:
void IssueRequest();
void DoCancel();
void RunL();
TInt RunError( TInt aError );
private:
CApAppUi&        iApAppUi;
RSystemAgent    iSystemAgent;
TSysAgentEvent  iSAEvent;
};
In the implementation of this class, use the following code to issue a notification request for the event(s) that you are interested in:
iSAEvent.SetRequestStatus( iStatus );
if( !IsActive() )       
{      
iSystemAgent.NotifyOnAnyEvent( iSAEvent );
SetActive();            
}
When an event comes in, use the following code to intercept the event in the RunL() method:
void CApAppUi::HandleSystemAgentEventL(const TInt aSaVariableUid,
const Tint aSaVariableState)
{
    switch( aSaVariableUid )
{
case KUidChargerCStatusValue:
  if( aSaVariableState == ESACChargerOn )
      {
      // Charger connected
      }
  else if( aSaVariableState == ESACChargerError )
      {
      // Charger error
      }
  else if( aSaVariableState == ESACChargerFull )
      {
      // Battery full
      }
  break;
}
}
Definitions used:
const TInt KUidChargerCStatusValue = 0x100052D7;
const TUid KUidChargerCStatus = {KUidChargerCStatusValue};
enum TSAChargerCStatus
{
ESACChargerOff,
ESACChargerOn,
ESACChargerAlmostFull,
ESACChargerFull,
ESACChargerError
}