Trick:Controlling the backlight(Symbian/UIQ)

To turn on the backlight and keep it turned on, a timer can be used that fires every ten seconds. When the timer fires a raw event is simulated, which keeps the backlight turned on.

The following example code illustrates this.

void CStreamingClientAppUi::ConstructL()

{

......

iTimer=CPeriodic::NewL(CActive::EPriorityStandard); // CPeriodic *iTimer;

iTimer->Start(KTimerTick,KTimerTick,TCallBack(Tick,this));//const TInt KTimerTick = 10 * 1000 * 1000;

......

}

CStreamingClientAppUi::~CStreamingClientAppUi()

{

iTimer->Cancel();

delete iTimer;

}

//This method should be declared as static

// static TInt Tick(TAny* /*aAny*/);

TInt CStreamingClientAppUi::Tick(TAny */*aObject*/)

{

User::ResetInactivityTime();

RWsSession session;

session.Connect();

TRawEvent event;

event.Set(TRawEvent::EActive);

session.SimulateRawEvent(event);

session.Flush();

session.Close();

return KErrNone; //Return that we want the timer to continue calling us.

}