--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/vtengines/videoteleng/Src/Base/CVtEngEventManager.cpp Mon Nov 23 14:47:47 2009 +0200
@@ -0,0 +1,271 @@
+/*
+* Copyright (c) 2006 Nokia Corporation and/or its subsidiary(-ies).
+* All rights reserved.
+* This component and the accompanying materials are made available
+* under the terms of "Eclipse Public License v1.0"
+* which accompanies this distribution, and is available
+* at the URL "http://www.eclipse.org/legal/epl-v10.html".
+*
+* Initial Contributors:
+* Nokia Corporation - initial contribution.
+*
+* Contributors:
+*
+* Description: Event manager implementation.
+*
+*/
+
+
+
+// INCLUDE FILES
+#include "CVtEngEventManager.h"
+#include "MVtEngEventObserver.h"
+#include "VtEngUtils.h"
+#include "VtEngEvents.h"
+#include "VtEngPanic.h"
+#include <cvtlogger.h>
+
+// CONSTANTS
+const TInt KMaxEventsInQueue = 8;
+
+// max amount of simultanous event observers
+const TInt KMaxVtEventObservers = 2;
+
+// ============================ MEMBER FUNCTIONS ===============================
+
+// -----------------------------------------------------------------------------
+// CVtEngEventManager::CVtEngEventManager
+// C++ constructor can NOT contain any code, that
+// might leave.
+// -----------------------------------------------------------------------------
+//
+CVtEngEventManager::CVtEngEventManager() : CActive( CActive::EPriorityHigh ),
+ iObservers( KMaxVtEventObservers )
+ {
+ CActiveScheduler::Add( this );
+ }
+
+
+// -----------------------------------------------------------------------------
+// CVtEngEventManager::NewL
+// Two-phased constructor.
+// -----------------------------------------------------------------------------
+//
+CVtEngEventManager* CVtEngEventManager::NewL(
+ MVtEngEventObserver& aEventObserver )
+ {
+ CVtEngEventManager* self =
+ new ( ELeave ) CVtEngEventManager();
+ CleanupStack::PushL( self );
+ self->ConstructL( aEventObserver );
+ CleanupStack::Pop(); // self
+ return self;
+ }
+
+// -----------------------------------------------------------------------------
+// CVtEngEventManager::ConstructL
+// 2nd phase constructor.
+// -----------------------------------------------------------------------------
+//
+void CVtEngEventManager::ConstructL( MVtEngEventObserver& aEventObserver )
+ {
+ iEventQueue = new ( ELeave ) CArrayFixFlat< TInt >( KMaxEventsInQueue );
+ iEventQueue->SetReserveL( KMaxEventsInQueue );
+ iObservers.Append( &aEventObserver );
+ }
+
+// Destructor
+CVtEngEventManager::~CVtEngEventManager()
+ {
+ Cancel();
+ delete iEventQueue;
+ iObservers.Close();
+ }
+
+// -----------------------------------------------------------------------------
+// CVtEngEventManager::SessionStateChangedL
+// Notifies session state change to UI.
+// -----------------------------------------------------------------------------
+//
+void CVtEngEventManager::SessionStateChanged()
+ {
+ __VTPRINTENTER( "EventManager.SessionStateChanged" )
+ NotifyEvent( KVtEngSessionStateChanged );
+ __VTPRINTEXIT( "EventManager.SessionStateChanged" )
+ }
+
+// -----------------------------------------------------------------------------
+// CVtEngEventManager::NotifyEvent
+// -----------------------------------------------------------------------------
+//
+void CVtEngEventManager::NotifyEvent( const TInt aEvent )
+ {
+ __VTPRINTENTER( "EventManager.NotifyEvent" )
+ __VTPRINT2( DEBUG_GEN, "EventManager.NotifyEvent event=%d", aEvent );
+ CVtEngEventManager& eventManager =
+ CVtEngUtility::EventManager();
+ if ( !eventManager.QueueAsyncEvent( aEvent ) )
+ {
+ eventManager.DoNotifyEvent( aEvent );
+ }
+ __VTPRINTEXIT( "EventManager.NotifyEvent" )
+ }
+
+// -----------------------------------------------------------------------------
+// CVtEngEventManager::AddObserverL
+//
+// -----------------------------------------------------------------------------
+//
+void CVtEngEventManager::AddObserverL( MVtEngEventObserver* aObserver )
+ {
+ TInt count( iObservers.Count() );
+ TBool duplicate = EFalse;
+ while ( count-- )
+ {
+ if ( aObserver == iObservers[ count ] )
+ {
+ count = 0; // break loop
+ duplicate = ETrue;
+ }
+ }
+ if ( !duplicate )
+ {
+ User::LeaveIfError( iObservers.Append( aObserver ) );
+ }
+ }
+
+// -----------------------------------------------------------------------------
+// CVtEngEventManager::RemoveObserver
+//
+// -----------------------------------------------------------------------------
+//
+void CVtEngEventManager::RemoveObserver( const MVtEngEventObserver* aObserver )
+ {
+ TInt count( iObservers.Count() );
+ while ( count-- )
+ {
+ if ( aObserver == iObservers[ count ] )
+ {
+ iObservers.Remove( count );
+ count = 0; // break loop
+ }
+ }
+ }
+
+// -----------------------------------------------------------------------------
+// CVtEngEventManager::RunL
+// Notify event
+// -----------------------------------------------------------------------------
+//
+void CVtEngEventManager::RunL()
+ {
+ __VTPRINTENTER( "EventManager.RunL" )
+ __VTPRINT2( DEBUG_GEN, "EventManager.RunL count=%d", iEventQueue->Count() );
+ // get oldest event in queue (event at index 0)
+ const TInt event = iEventQueue->At( 0 ) ;
+
+ // delete event before calling DoNotifyEvent(), because DoNotifyEvent() may
+ // hang if it causes ASynchronous call in handler
+ iEventQueue->Delete( 0 );
+
+ // if more events pending -> signal again
+ if( iEventQueue->Count() > 0 )
+ {
+ Signal();
+ }
+
+ // and finally notify event
+ DoNotifyEvent( event );
+ __VTPRINTEXIT( "EventManager.RunL" )
+ }
+
+// -----------------------------------------------------------------------------
+// CVtEngEventManager::DoCancel
+// No op
+// -----------------------------------------------------------------------------
+//
+void CVtEngEventManager::DoCancel()
+ {
+ }
+
+// -----------------------------------------------------------------------------
+// CVtEngEventManager::DoNotifyEvent
+// -----------------------------------------------------------------------------
+//
+void CVtEngEventManager::DoNotifyEvent( const TInt aEvent )
+ {
+ __VTPRINTENTER( "EventManager.DoNotifyEvent" )
+ __VTPRINT2( DEBUG_GEN, "EventManager.DoNotifyEvent event=%d", aEvent );
+ TRAP_IGNORE( {
+ TInt count( iObservers.Count() );
+ while ( count-- )
+ {
+ iObservers[count]->HandleVtEventL( aEvent ) ;
+ }
+ } )
+ __VTPRINTEXIT( "EventManager.DoNotifyEvent" )
+ }
+
+// -----------------------------------------------------------------------------
+// CVtEngEventManager::QueueAsyncEvent
+// -----------------------------------------------------------------------------
+//
+TBool CVtEngEventManager::QueueAsyncEvent( const TInt aEvent )
+ {
+ __VTPRINTENTER( "EventManager.QueueAsyncEvent" )
+ __VTPRINT2( DEBUG_GEN, "EventManager.QueueAsyncEvent event=%d", aEvent );
+ TBool async( EFalse );
+ switch ( aEvent )
+ {
+ case KVtEngSessionStateChanged:
+ case KVtEngNegotiationProblem:
+ case KVtEngShareImageInitializeBegin:
+ case KVtEngShareImageInitializeEnd:
+ async = ETrue;
+ QueueAndSignal( aEvent );
+ break;
+ default:
+ break;
+ }
+ __VTPRINTEXIT( "EventManager.QueueAsyncEvent" )
+ return async;
+ }
+
+// -----------------------------------------------------------------------------
+// CVtEngEventManager::QueueAndSignal
+// -----------------------------------------------------------------------------
+//
+void CVtEngEventManager::QueueAndSignal( const TInt aEvent )
+ {
+ __VTPRINTENTER( "EventManager.QueueAndSignal" )
+ __VTPRINT2( DEBUG_GEN, "EventManager.QueueAndSignal event=%d", aEvent );
+ if( iEventQueue->Count() < KMaxEventsInQueue )
+ {
+ TRAP_IGNORE( iEventQueue->AppendL( aEvent ) ); // can't leave
+ Signal();
+ }
+ else
+ {
+ Panic( EVtEngPanicInvalidTooManyPendingEvents );
+ }
+ __VTPRINTEXIT( "EventManager.QueueAndSignal" )
+ }
+
+// -----------------------------------------------------------------------------
+// CVtEngEventManager::Signal
+// -----------------------------------------------------------------------------
+//
+void CVtEngEventManager::Signal()
+ {
+ __VTPRINTENTER( "EventManager.Signal" )
+ if( !IsActive() )
+ {
+ SetActive();
+ TRequestStatus* status = &iStatus;
+ User::RequestComplete( status, KErrNone );
+ __VTPRINT2( DEBUG_GEN, "EventManager.QueueAndSignal count=%d", iEventQueue->Count() );
+ }
+ __VTPRINTEXIT( "EventManager.Signal" )
+ }
+
+// End of File