--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/locsrv_pub/location_triggering_api/inc/lbttriggerchangeeventnotifier.h	Tue Feb 02 01:06:48 2010 +0200
@@ -0,0 +1,123 @@
+/*
+* 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:  location triggering server client interface
+*
+*/
+
+
+
+#ifndef LBTTRIGGERCHANGEEVENTNOTIFIER_H
+#define LBTTRIGGERCHANGEEVENTNOTIFIER_H
+
+#include <lbt.h>
+#include <lbttriggerchangeeventobserver.h>
+
+/**
+ * Helper class to receive trigger change event 
+ * through observer interface. 
+ *
+ * @see RLbt::NotifyTriggerChangeEvent
+ *
+ * @lib lbt.lib
+ *
+ * @since S60 5.1
+ */
+class CLbtTriggerChangeEventNotifier : public CActive
+    {
+public:
+    /**
+     * Construct a trigger change event notifier object. 
+     *
+     * When the object is constructed. The trigger change 
+     * notification request is not issued to the
+     * Location Triggering Server. Client shall call 
+     * CLbtTriggerChangeEventNotifier::Start() to start
+     * notification.
+     *
+     * @param[in] aLbt A reference to RLbt object. The subsession 
+     * must be opened. Otherwise a panic is raised.
+     * @param[in] aObserver A reference to the 
+     * observer object to receive trigger change event.
+     * @param[in] aPriority An integer specifying the 
+     * priority of this active object. CActive::TPriority 
+     * defines a standard set of priorities. 
+     *
+     * @panic LocTriggering ELbtServerBadHandle If the 
+     * subsession of aLbt is not opened.
+     */
+    IMPORT_C static CLbtTriggerChangeEventNotifier* NewL( 
+        RLbt& aLbt,
+        MLbtTriggerChangeEventObserver& aObserver,
+        TInt aPriority = CActive::EPriorityStandard );
+
+    /**
+     * Destructor. 
+     *
+     * If the notification is started, the 
+     * destructor will cancel the notification.
+     */
+    IMPORT_C ~CLbtTriggerChangeEventNotifier();
+
+    /**
+     * Start trigger change event notification. 
+     *
+     * After this function is called, when any 
+     * trigger is changed in Location Trigger Server, the
+     * client will be notified from the observer interface.
+     * 
+     * Client shall call Cancel() function to stop the
+     * trigger change event notification.
+     */
+    IMPORT_C void Start();
+
+
+private:
+    //Derived from CActive
+    void RunL();
+    TInt RunError( TInt aError );
+    void DoCancel();
+
+private:
+    /**
+     * C++ default constructor
+     */
+    CLbtTriggerChangeEventNotifier(
+        RLbt& aLbt,
+        MLbtTriggerChangeEventObserver& aObserver,
+        TInt aPriority = CActive::EPriorityStandard );
+    
+    /**
+     * Symbian 2nd phase constructor 
+     */
+    void ConstructL();
+
+private:
+    /**
+     * Trigger change event object.
+     */
+    TLbtTriggerChangeEvent iChangeEvent;
+    
+    /** 
+     * Reference to Lbt subsession.
+     */
+    RLbt& iLbt;
+    
+    /**
+     * Reference to trigger change event observer.
+     */
+    MLbtTriggerChangeEventObserver& iObserver;
+    
+    };
+
+#endif // LBTTRIGGERCHANGEEVENTNOTIFIER_H