diff -r 25fce757be94 -r e02eb84a14d2 usbuis/usbui/USBClassChangeUIPlugin/inc/usbotghoststatewatcher.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/usbuis/usbui/USBClassChangeUIPlugin/inc/usbotghoststatewatcher.h	Wed Sep 01 12:20:49 2010 +0100
@@ -0,0 +1,267 @@
+/*
+* Copyright (c) 2009 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:  OtgHost state watcher class.
+ *
+*/
+
+
+#ifndef USBOTGHOSTSTATEWATCHER_H
+#define USBOTGHOSTSTATEWATCHER_H
+
+// INCLUDE FILES
+#include <e32base.h>
+#include <e32property.h>
+#include <usbman.h>
+#include <usbhostdefs.h>
+
+
+/**
+ * A callback interface for informing about OtgHost state changes
+ */
+class MUSBOtgHostStateObserver
+    {
+    public:
+        
+        /**
+         * Informs the observer that USB Otg Id Pin state has changed.
+         * @param aIsPinOn Id pin state - ETrue(On), EFalse(Off) 
+         */
+        virtual void OtgHostIdPinStateChanged(TBool aIsIdPinOn) = 0;
+
+        /**
+         * Informs the observer that USB host event.
+         * @param aEventInfo Device information related to this event
+         */
+        virtual void HostEventNotify(TDeviceEventInformation aEventInfo) = 0;
+    };
+
+// CLASS DECLARATION
+
+/**
+ * Class that listens for USB OtgHost state changes then notifies
+ * the observer.
+ */
+class CUSBOtgHostStateWatcher : CBase
+    {
+    class CUSBOtgIdPinStateWatcher : public CActive
+        {
+    public:
+        /**
+         * Two-phased constructor. 
+         *
+         * @param aOtgHostStateWatcher Reference to the owner - CUSBOtgHostStateWatcher.
+         * @return Pointer to created object.
+         */
+        static CUSBOtgIdPinStateWatcher* NewL(CUSBOtgHostStateWatcher& aOtgHostStateWatcher);
+
+        /** C++ destructor */
+        virtual ~CUSBOtgIdPinStateWatcher();
+
+        /**
+         * Get Id pin state
+         * @aIsIdPinOn Receive Id pin on/off state. ETrue: Id pin on, EFalse: Id pin off.
+         * @return KErrNone if successful, otherwise the error that occurred 
+         */
+        TInt IsIdPinOn(TBool &aIsIdPinOn);
+        
+    protected:
+        // from base class CActive
+        /**
+         * From CActive.
+         * This method is called when Id pin state has changed.
+         */
+        void RunL();
+
+        /**
+         * From CActive.
+         * In this implementation this method should never be called.
+         *
+         * @param aError the leave code
+         * @return KErrNone
+         */
+        TInt RunError(TInt aError);
+
+        /**
+         * From CActive
+         * If there is outstanding request pending when Cancel() is called then
+         * this method must cancel request.
+         */
+        void DoCancel();
+
+    private:
+        /**
+         * C++ constructor
+         * @param aOtgHostStateWatcher Reference to the owner - CUSBOtgHostStateWatcher.
+         */
+        CUSBOtgIdPinStateWatcher(CUSBOtgHostStateWatcher& aOtgHostStateWatcher);
+        
+        /**
+         * 2nd phase constructor.
+         */
+        void ConstructL();
+        
+    private: // Data
+        /**
+         * The observer observes property change
+         */
+        RProperty iIdPin;
+        
+        /**
+         * The owner - CUSBOtgHostStateWatcher
+         */
+        CUSBOtgHostStateWatcher& iOtgHostStateWatcher;
+        };
+
+    class CUSBHostEventNotifWatcher : public CActive
+        {
+    public:
+        /**
+         * Two-phased constructor. 
+         *
+         * @param aOtgHostStateWatcher Reference to the owner - CUSBOtgHostStateWatcher.
+         * @return Pointer to created object.
+         */
+        static CUSBHostEventNotifWatcher* NewL(CUSBOtgHostStateWatcher& aOtgHostStateWatcher);
+
+        /** C++ destructor */
+        virtual ~CUSBHostEventNotifWatcher();
+
+    protected:
+        // from base class CActive
+        /**
+         * From CActive.
+         * This method is called when host event emerged .
+         */
+        void RunL();
+
+        /**
+         * From CActive.
+         * In this implementation this method should never be called.
+         *
+         * @param aError the leave code
+         * @return KErrNone
+         */
+        TInt RunError(TInt aError);
+
+        /**
+         * From CActive
+         * If there is outstanding request pending when Cancel() is called then
+         * this method must cancel request.
+         */
+        void DoCancel();
+
+    private:
+        /**
+         * C++ constructor
+         * @param aOtgHostStateWatcher Reference to the owner - CUSBOtgHostStateWatcher.
+         */
+        CUSBHostEventNotifWatcher(CUSBOtgHostStateWatcher& aOtgHostStateWatcher);
+        
+        /**
+         * 2nd phase constructor.
+         */
+        void ConstructL();
+        
+    private: // Data
+        /**
+         * Notification info comes to this member
+         */
+        TDeviceEventInformation iEventInfo;
+        
+        /**
+         * The owner - CUSBOtgHostStateWatcher
+         */
+        CUSBOtgHostStateWatcher& iOtgHostStateWatcher;
+        };
+    
+    public:  // Constructors and destructor
+        
+        /**
+         * Two-phased constructor. Uses existing usb manager session.
+         * Note that it's not possible (and usually not necessary) to attach
+         * more than one USBOtgHostStateWatcher to the same session.
+         *
+         * @param aObserver  Reference to OtgHost state observer.
+         * @param aUsbMan    Existing usb manager session.
+         * @return Pointer to created object.
+         */
+        static CUSBOtgHostStateWatcher* NewL(MUSBOtgHostStateObserver& aObserver,
+            RUsb& aUsbMan);
+        
+        /**
+         * Destructor.
+         */
+        virtual ~CUSBOtgHostStateWatcher();
+
+        /**
+         * Get Id pin state
+         * @aIsIdPinOn Receive Id pin on/off state. ETrue: Id pin on, EFalse: Id pin off.
+         * @return KErrNone if successful, otherwise the error that occurred 
+         * @see CUSBOtgIdPinStateWatcher::IsIdPinOn
+         */
+        TInt IsIdPinOn(TBool &aIsIdPinOn);
+        
+        /**
+         * Check wheather a pheripheral device is connected or not. 
+         * @aIsConnected A pheripheral device connected(ETrue) or not(EFailse).
+         * @return KErrNone if successful, otherwise the error that occurred 
+         */
+       TInt IsPeripheralConnected(TBool &aIsConnected);
+        
+    private:
+
+        /**
+         * Private constructor.
+         * @param aObserver Reference to MUSBOtgHostStateObserver.
+         * @param aUsbMan Existing usb manager session.
+         */
+        CUSBOtgHostStateWatcher(MUSBOtgHostStateObserver& aObserver, RUsb& aUsbMan);
+
+        /**
+         * 2nd phase constructor.
+         */
+        void ConstructL();
+        
+    private: // Data
+
+        /**
+         * Usb Manager
+         */
+        RUsb& iUsbMan;
+
+        /**
+         * Property of peripheral-connected
+         */
+        RProperty iPeripheral;
+        
+        /**
+         * The observer of OTG/host events
+         */
+        MUSBOtgHostStateObserver& iObserver;
+        
+        /**
+         * The watcher of Otg Id Pin state
+         * Own.
+         */
+        CUSBOtgIdPinStateWatcher* iOtgIdPinWatcher;
+        
+        /**
+         * The watcher of host event
+         * Own.
+         */
+        CUSBHostEventNotifWatcher* iHostEventWatcher;
+        
+    };
+
+#endif   // USBOTGHOSTSTATEWATCHER_H