--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/bluetoothengine/btui/devmodel/src/btregistryobserver.cpp	Wed Sep 01 12:20:04 2010 +0100
@@ -0,0 +1,256 @@
+/*
+* 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:  Monitors BTRegistry device changes and sends the 
+*				 new status to listener
+*
+*/
+
+#include "btregistryobserver.h"
+#include "debug.h"
+
+#include <bt_subscribe.h>
+const TInt KDeviceArrayDefaultSize=10;
+// ---------------------------------------------------------------------
+// Constructor
+// ---------------------------------------------------------------------
+CBTRegistryObserver::CBTRegistryObserver(MBTRegistryObserver* aObserver, 
+    const TBTRegistrySearch aPattern) 
+    	: CActive(CActive::EPriorityHigh), 
+      	  iObserver(aObserver),   iSearchPattern(aPattern)
+    {    
+    TRACE_FUNC_ENTRY
+    CActiveScheduler::Add(this);
+    // The priority will be EPriorityHigh only initially.
+    // after the first successfull retrieval of the devicelist
+    // the priority will be changed to EPriorityLow.
+    
+    // This will make the 1st devicelist drawn as quickly as possible,
+    // but the subsequent refrehes will not decrease the responsiveness
+    // of the Btui.
+    iAnotherEventPending=EFalse;
+    
+    TRACE_FUNC_EXIT
+    }
+// ---------------------------------------------------------------------
+// CBTRegistryObserver::NewL
+// ---------------------------------------------------------------------
+CBTRegistryObserver* CBTRegistryObserver::NewL(MBTRegistryObserver* aObserver,
+	  const TBTRegistrySearch aPattern)
+    {
+    CBTRegistryObserver* self = new (ELeave) CBTRegistryObserver(aObserver, aPattern);
+    CleanupStack::PushL(self);
+    self->ConstructL();
+    CleanupStack::Pop(self);
+    return self;
+    }
+// ---------------------------------------------------------------------
+// Destructor
+// ---------------------------------------------------------------------    
+CBTRegistryObserver::~CBTRegistryObserver()
+    {
+    TRACE_FUNC_ENTRY
+    Cancel();
+    iProperty.Close();
+    delete iDevMan;
+    
+    DeleteAllocatedDevices();
+    
+    delete iRegDeviceArray;
+    iRegDeviceArray=NULL;
+    
+    TRACE_FUNC_EXIT
+    }
+// ---------------------------------------------------------------------
+// CBTRegistryObserver::ConstructL()
+// ---------------------------------------------------------------------
+void CBTRegistryObserver::ConstructL()
+    {
+    TRACE_FUNC_ENTRY
+	iRegDeviceArray = new (ELeave) CBTDeviceArray(KDeviceArrayDefaultSize);    
+    iDevMan =  CBTEngDevMan::NewL(this);
+    iDevMan->SetPriority(CActive::EPriorityHigh);
+    
+    iProperty.Attach(KPropertyUidBluetoothCategory, KPropertyKeyBluetoothGetRegistryTableChange);
+    StartIfNotRunning();
+    TRACE_FUNC_EXIT
+    }
+// ---------------------------------------------------------------------
+// CBTRegistryObserver::Refresh
+// This will simulate registry change event.
+// ---------------------------------------------------------------------    
+void CBTRegistryObserver::Refresh()
+	{
+	TRACE_FUNC_ENTRY
+	
+	__ASSERT_DEBUG(iDevMan, User::Invariant());
+	
+    if (iDevMan->IsActive())
+    	{
+    	// An attempt to start a new search, during a prior
+    	// one. 
+    	iAnotherEventPending=ETrue;
+    	return;
+    	}   
+	Cancel();
+
+    DeleteAllocatedDevices();
+    iDevMan->GetDevices(iSearchPattern, iRegDeviceArray);
+    
+	StartIfNotRunning();    
+    
+    TRACE_FUNC_EXIT    
+	}
+	
+// ---------------------------------------------------------------------
+// CBTRegistryObserver::StartIfNotRunning
+// this have to be called again each time there has been registry event
+// ---------------------------------------------------------------------
+void CBTRegistryObserver::StartIfNotRunning()
+    {
+    TRACE_FUNC_ENTRY
+    if (!IsActive())
+        {
+        TRACE_INFO(_L("Start()"))
+        iIsStopped = EFalse;
+        iProperty.Subscribe(iStatus);
+        SetActive();
+        }
+    TRACE_FUNC_EXIT        
+    }
+// ---------------------------------------------------------------------
+// CBTRegistryObserver::RunL
+// From CAtive
+// This is called when registry has changed. This will not
+// be called when BTRegistry date retrieval is complete, since
+// HandleGetDevicesComplete is called when RBTregistry data retrieval
+// is complete
+// ----------------------------------------------------------------------
+
+void CBTRegistryObserver::RunL()
+    {
+    TRACE_FUNC_ENTRY
+    if(iDevMan && iDevMan->IsActive())
+    	{
+    	// An attempt to start a new search, during a prior
+    	// one. We will not start a new search, but we
+    	// will do it after the current search is complete
+    	iAnotherEventPending=ETrue;
+    	StartIfNotRunning();
+		TRACE_FUNC_EXIT    	
+    	return;
+    	}
+    if(!IsActive())
+    	SetPriority(CActive::EPriorityLow);
+    
+    
+
+    TInt registryTable;
+    iProperty.Get(registryTable);
+    iAnotherEventPending=EFalse;
+    
+    if(iDevMan && iStatus.Int() == KErrNone && registryTable == KRegistryChangeRemoteTable)
+        {
+        TRACE_INFO(_L("Remote table change"))
+        
+        DeleteAllocatedDevices();
+        iDevMan->GetDevices(iSearchPattern, iRegDeviceArray);
+        }
+    StartIfNotRunning();
+    TRACE_FUNC_EXIT
+    }
+
+// ---------------------------------------------------------------------
+// CBTRegistryObserver::HandleGetDevicesComplete
+// From MBTEngDevManObserver
+//
+// This function will not filter out refreshes with no changes,
+// since the connect status may have been changed in those cases, and
+// this class does not know about that
+//
+// It is worth to mention that CBTDeviceContainer will not refresh parts
+// of the screen that are not changed.
+// ---------------------------------------------------------------------
+void  CBTRegistryObserver::HandleGetDevicesComplete(TInt aErr, CBTDeviceArray* aDeviceArray)
+    {
+    TRACE_FUNC_ENTRY
+    TRACE_INFO((_L("aErr = %d"), aErr))
+    
+    // the initial view refresh is done. We will decrese
+    // the priority of this component to quarantee UI
+    // responsiveness
+    if(!iDevMan->IsActive())
+    	iDevMan->SetPriority(CActive::EPriorityLow);
+    
+    TRAP_IGNORE(
+		if( aErr != KErrNotFound)
+			iObserver->RegistryChangedL(aDeviceArray );
+		else
+			{
+			// handle the empty response case. The DevMan may issue
+			// NULL in that case 
+			iObserver->RegistryChangedL(iRegDeviceArray );	
+			}
+	);	
+
+    DeleteAllocatedDevices();
+
+	if(iAnotherEventPending)	
+		{
+		// Current results are not sent further, since
+		// there has been changes, witch may have rendered the current
+		// results allready obsolate. Therefore a refresh is made instead
+    
+		iAnotherEventPending=EFalse;
+        iDevMan->GetDevices(iSearchPattern, iRegDeviceArray);
+		}
+    TRACE_FUNC_EXIT		
+    }
+
+// ---------------------------------------------------------------------
+// CBTRegistryObserver::DeleteAllocatedDevices
+// ---------------------------------------------------------------------
+void CBTRegistryObserver::DeleteAllocatedDevices()
+	{
+	TRACE_FUNC_ENTRY
+	if(iRegDeviceArray)
+		{
+        iRegDeviceArray->ResetAndDestroy();
+        }
+    TRACE_FUNC_EXIT		
+	}
+// ---------------------------------------------------------------------
+// CBTRegistryObserver::Cancel
+// From CActive
+// ---------------------------------------------------------------------
+    
+void CBTRegistryObserver::Cancel()
+    {
+    TRACE_FUNC_ENTRY
+    iIsStopped = ETrue;
+    iAnotherEventPending=EFalse;    
+    CActive::Cancel();
+    if (iDevMan) iDevMan->Cancel();
+    DeleteAllocatedDevices();
+    TRACE_FUNC_EXIT    
+    }
+// ---------------------------------------------------------------------
+// CBTRegistryObserver::DoCancel
+// From CActive
+// ---------------------------------------------------------------------
+void CBTRegistryObserver::DoCancel()
+	{
+	TRACE_FUNC_ENTRY
+    iProperty.Cancel();	
+    TRACE_FUNC_EXIT
+	}