bluetoothengine/btui/Ecom/inc/BTUIRegistryWatcher.h
branchRCL_3
changeset 56 9386f31cc85b
parent 0 f63038272f30
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/bluetoothengine/btui/Ecom/inc/BTUIRegistryWatcher.h	Wed Sep 01 12:20:04 2010 +0100
@@ -0,0 +1,120 @@
+/*
+* Copyright (c) 2002 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:  Declares Registry watcher class for BTUI.
+*
+*/
+
+
+#ifndef CBTUIREGISTRYWATCHERAO_H
+#define CBTUIREGISTRYWATCHERAO_H
+
+// INCLUDES
+
+#include <bt_subscribe.h>
+
+// CLASS DECLARATION
+
+/**
+* A callback interface for informing content change of BT Registry.
+*/
+class MBTUIRegistryObserver
+    {
+    public: // New functions
+
+        /**
+        * Informs the observer that contents of Registry has been changed.
+        * @param None.
+        * @return None.
+        */
+        virtual void RegistryContentChangedL()=0;
+    };
+
+
+// CLASS DECLARATION
+
+/**
+* An active object based class which can used to listen
+* Registry changes
+*/
+class CBTUIRegistryWatcherAO : public CActive
+    {
+    public: // Constructors and destructor
+
+        /**
+        * C++ default constructor.
+        */
+        CBTUIRegistryWatcherAO( MBTUIRegistryObserver* aParent );
+
+        /**
+        * Destructor.
+        */
+        virtual ~CBTUIRegistryWatcherAO();
+
+    public: // New functions
+
+        /**
+        * Starts / continues Registry watching
+        *
+        * @param None.
+        * @return None.
+        */
+        void WatchL();
+
+        /**
+        * Starts / continues Registry watching
+        *
+        * @param None.
+        * @return None.
+        */
+        void StopWatching();
+
+    private: // Functions from base classes
+
+        /**
+        * From CActive Gets called when CActive::Cancel is called, 
+        *              cancels Registry watching.
+        *
+        * @param None.
+        * @return None.
+        */
+        void DoCancel();
+
+        /**
+        * From CActive Gets called when content of Registry is changed, 
+        *              calls MBTUIRegistryObserver::RegistryContentChangedL.
+        *
+        * @param None.
+        * @return None.
+        */
+        void RunL();       
+
+        /**
+        * From CActive Handles a leave occurring in the request completion event.        
+        *
+        * @param aError The leave code.
+        * @return Symbian OS error code.
+        */
+        TInt RunError(TInt aError);
+
+    private: // Data
+
+        // Reference to observer
+        MBTUIRegistryObserver* iParent;
+        // Database handle
+        RProperty iProperty;
+    };
+
+#endif
+
+// End of File