--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/usbengines/usbotgwatcher/inc/cusbotgstateobserver.h Fri Jun 04 10:27:39 2010 +0100
@@ -0,0 +1,164 @@
+/*
+ * Copyright (c) 2008 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: Observes OTG states
+ *
+ */
+
+#ifndef C_USBOTGSTATEOBSERVER_H
+#define C_USBOTGSTATEOBSERVER_H
+
+#include <e32base.h>
+#include <e32property.h>
+#include <usbotgdefs.h>
+
+/**
+ * Observer need to implement this interface to get OTG state change notifications
+ */
+NONSHARABLE_CLASS( MUsbOtgStateObserver)
+ {
+public:
+
+ /**
+ * Local device is A, and get to Idle state
+ */
+ virtual void AIdleL() = 0;
+
+ /**
+ * Local device is A, and get to Host state
+ */
+ virtual void AHostL() = 0;
+
+ /**
+ * Local device is A, and get to Peripheral state
+ */
+ virtual void APeripheralL() = 0;
+
+ /**
+ * Local device is A, and get VBus error
+ */
+ virtual void AVBusErrorL() = 0;
+
+ /**
+ * Local device is B, and get to Idle state
+ */
+ virtual void BIdleL() = 0;
+
+ /**
+ * Local device is B, and get to Peripheral state
+ */
+ virtual void BPeripheralL() = 0;
+
+ /**
+ * Local device is B, and get to Host state
+ */
+ virtual void BHostL() = 0;
+
+ /**
+ * Error handler
+ * @param aError error code
+ */
+ virtual void OtgStateErrorL(TInt aError) = 0;
+ };
+
+/**
+ * Class observes OTG State property
+ *
+ */
+NONSHARABLE_CLASS( CUsbOtgStateObserver ) : public CActive
+ {
+
+public:
+
+ /**
+ * Two-phased constructor.
+ */
+ static CUsbOtgStateObserver* NewL();
+
+ /**
+ * Destructor.
+ */
+ virtual ~CUsbOtgStateObserver();
+
+ /**
+ * Gets current OTG state
+ * @return OTG state
+ */
+ TUsbOtgState OtgState();
+
+ /**
+ * Subscribes for getting notifications
+ * @param aObserver Observer
+ */
+ void SubscribeL(MUsbOtgStateObserver& aObserver);
+
+ /**
+ * Unsubscribes from getting notifications
+ * @param aObserver Observer
+ */
+ void UnsubscribeL(MUsbOtgStateObserver& aObserver);
+
+private:
+
+ // From CActive
+ /**
+ * Called when outstanding request completed
+ *
+ */
+ void RunL();
+
+ /**
+ * Called when outstanding request is cancelled
+ *
+ */
+ void DoCancel();
+
+ /**
+ * Called when RunL leaves
+ *
+ * @param errorcode
+ * @return errorcode
+ */
+ TInt RunError(TInt aError);
+
+private:
+
+ /**
+ * Default constructor
+ *
+ */
+ CUsbOtgStateObserver();
+
+ /**
+ * Second phase construction
+ *
+ */
+ void ConstructL();
+
+private:
+ // data
+
+ /**
+ * The observer reports state changes to own observers
+ * Not owns
+ */
+ RPointerArray<MUsbOtgStateObserver> iObservers;
+
+ /**
+ * The observer observes property change
+ */
+ RProperty iOtgState;
+
+ };
+
+#endif // C_USBOTGSTATEOBSERVER_H