The application framework calls CCoeAppUI::HandleForegroundEventL() when the application is switched to the foreground or background.
While the default implementation of this method is empty, it can be, for example, used to display messages or pause a game when a focus change event occurs.
An example of such a foreground event implementation is as follows:
// ------------------------------------------------------------------------------
// CMyViewAppUi::HandleForegroundEventL(TBool aForeground)
// This function is called by the framework when the screen loses or gains focus.
// i.e. when it goes to the background or to the foreground. Incoming call
// softnote is an example.
// This event applies to the entire application, all views.
// ------------------------------------------------------------------------------
//
void CMyViewAppUi::HandleForegroundEventL(TBool aForeground)
{
if( aForeground == TRUE )
{
iEikonEnv->InfoMsg( _L( "Foreground true" ) );
}
else
{
iEikonEnv->InfoMsg( _L( "Foreground false" ) );
}
}
The aForeground parameter is true if the
application is switched to the foreground (is visible) and false if
the application has gone to the background.
Note: The above code snippet uses the MyView example application provided in the Platform Application Views package available from Nokia Developer .