--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/bluetoothengine/btui/devmodel/inc/btregistryobserver.h	Wed Sep 01 12:20:04 2010 +0100
@@ -0,0 +1,139 @@
+/*
+* Copyright (c) 2006-2007 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:  Registry observer is listening to registry changes and
+* 				  and reporting the changed devices to the listener.
+*
+*/
+
+#ifndef BTREGISTRYOBSERVER_H
+#define BTREGISTRYOBSERVER_H
+
+#include <e32base.h>
+#include <e32property.h>
+#include <btmanclient.h>
+#include <btengdevman.h> 
+
+/** This class will inform the listener about the new BTregistry status
+*after registry change events. 
+*
+* This class will listen to events about registry changes and inform
+* the listener about the latest registry status. The listener can
+* also ask the status using refresh. This is usefull for for
+* for example retrieval of initial lists of devices. 
+*
+*@lib btdevmodel.dll
+*@since S60 V3.2
+*/
+NONSHARABLE_CLASS(MBTRegistryObserver)
+    {
+public:
+	/** The aDeviceArray constents are deleted after this
+	* call returns. If storage is wanted the array and its contents
+	* must be copied by implementor.
+	*/
+    virtual void RegistryChangedL(const CBTDeviceArray* aDeviceArray) = 0;
+    };
+    
+NONSHARABLE_CLASS(CBTRegistryObserver) : public CActive, public MBTEngDevManObserver
+    {
+public: 
+	/** NewL
+	 *@param aObserver The class that is listening to registry changes
+	 *@param aPattern The pattern to be used to retrieve the changed objects.
+	 */
+    static CBTRegistryObserver* NewL(MBTRegistryObserver* aObserver, 
+        const TBTRegistrySearch aPattern);
+    
+    /** Destructor*/
+    virtual ~CBTRegistryObserver();       
+
+	/** Start listening to registry changes. 
+	 *
+	 *Calling this while registry observer is running is silently ignored.
+	 */
+    void StartIfNotRunning();
+
+    /* Registry observer will retrieve list of devices in the backround 
+     * and send it to the listener, when one is retrieved.
+     */
+    void Refresh();
+    
+    /** Check if this is running.       
+     *@return ETrue if not listening to registry changes.
+     */
+    inline TBool IsStopped() {return iIsStopped;}
+
+    /** This will stop listening and cancel any retrieval of devicelists,
+    * if any.
+    * @param none.
+    * @return none.
+    */
+    void Cancel();    
+private:
+	/* Constructor that may not leave.
+	 *@param aObserver The class that is listening to registry changes
+	 *@param aPattern The pattern to be used to retrieve the changed objects.
+	 */
+    CBTRegistryObserver(MBTRegistryObserver* aObserver, const TBTRegistrySearch aPattern);
+	/** 2nd phase constructor. Called by NewL only.
+    * @param none.
+    * @return none.	
+	 */
+    void ConstructL();
+
+	/** This is called when registry changes occur, but not when deviceLists are
+	* retrieved, since HandleGetDevicesComplete is called then. 
+	*
+	* If one or more registry events occur during devicelist retrieval, there
+	* will be one new devicelist retrieval after the current retrieval is done.
+	*
+    * @param none.
+    * @return none.
+	*/
+    void RunL();
+    
+    /** This will clear iRegDeviceArray and delete its contents.
+    * @param none.
+    * @return none.     
+    */
+    void DeleteAllocatedDevices();
+    
+    
+    /** This will cancel listening. To be called by Cancel only.
+     * @param none.
+     * @return none.
+	 */
+    void DoCancel();    
+    
+	/** This is called when devicelist have been read from BtDevMan 
+	* @param aErr KErrNone or the accurred error.
+	* @param aDeviceArray the devices that have been retrieved.
+    * @return none.
+    */
+    void HandleGetDevicesComplete(TInt aErr, CBTDeviceArray* aDeviceArray);
+    
+private:
+    MBTRegistryObserver* iObserver; // the class listening to this class
+    CBTDeviceArray* iRegDeviceArray;  // this is used for retrieving devices
+    TBTRegistrySearch iSearchPattern; // the search used to retrieve devices
+    								 // NOTE: this class does not filter the results,
+    								 // but the one listening to this (if filtering is done).
+    RProperty iProperty;
+    CBTEngDevMan* iDevMan;			// the object that is used to retrieve the device lists.
+    TBool iIsStopped;				// is this runining.
+    TBool iAnotherEventPending;		// Has there been one or more changes during this retrieval.
+    								// if this is true then HandleGetDevices will start a new search.
+    };
+    
+#endif