--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/utilities/mpapplicationmonitor/src/mpapplicationmonitor_p.cpp	Fri Sep 17 08:28:52 2010 +0300
@@ -0,0 +1,195 @@
+/*
+* 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: Music Player application monitor utility - private implementation.
+*
+*/
+
+#include <apgtask.h>
+#include <AknTaskList.h>
+
+#include "mpapplicationmonitor_p.h"
+#include "mpapplicationmonitor.h"
+#include "mptrace.h"
+
+// -1 means the window will never be visible.
+const TInt KWindowGroupPriority = -1;
+
+/*!
+    \class MpApplicationMonitorPrivate
+    \brief Music Player application monitor utility - private implementation.
+
+
+*/
+
+/*!
+ Constructor
+ */
+MpApplicationMonitorPrivate::MpApplicationMonitorPrivate( MpApplicationMonitor *qq )
+    : CActive( CActive::EPriorityStandard ),
+      q_ptr( qq )
+{
+    TX_ENTRY_ARGS( "Q pointer=" << ( void * )qq )
+    CActiveScheduler::Add( this );
+    TX_EXIT
+}
+
+/*!
+ Destructor
+ */
+MpApplicationMonitorPrivate::~MpApplicationMonitorPrivate()
+{
+    TX_LOG
+    // Cancel any outstanding request
+    Cancel();
+
+    iWindowGroup.Close();
+    iWsSession.Close();
+    TX_EXIT
+}
+
+/*!
+ \internal
+ */
+void MpApplicationMonitorPrivate::init( quint32 clientSecureId )
+{
+    TX_ENTRY
+    iHostUid = TUid::Uid( clientSecureId );
+    TRAPD( err, DoInitL() );
+    if ( err != KErrNone ) {
+        TX_LOG_ARGS( "Error: " << err << "; should never get here." );
+    }
+    TX_EXIT
+}
+
+/*!
+ Request if music player application is running.
+ */
+bool MpApplicationMonitorPrivate::isApplicationRunning()
+{
+    TX_ENTRY
+    bool running = false;
+    TRAPD( err, running = DoIsApplicationRunningL() );
+    if ( err != KErrNone ) {
+        TX_LOG_ARGS( "Error: " << err << "; should never get here." );
+    }
+    TX_EXIT
+    return running;
+}
+
+/*!
+ \internal
+ Checks if the chosen app is launched
+ */
+void MpApplicationMonitorPrivate::RunL()
+    {
+    // Get the status of this object.
+    const TInt errCode( iStatus.Int() );
+    TX_ENTRY_ARGS("Status=" << errCode);
+
+    if ( KErrNone == errCode ) {
+        TWsEvent event;
+        iWsSession.GetEvent( event );
+        if ( event.Type() == EEventWindowGroupsChanged ) {
+            emit q_ptr->applicationStatusChanged( isApplicationRunning() );
+        }
+        TX_LOG_ARGS("OK, renewing request");
+        StartMonitor();
+    }
+    else if ( KErrCancel != errCode ) {
+        TX_LOG_ARGS("Renewing request after error: " << errCode);
+        StartMonitor();
+    }
+    else {
+        TX_LOG_ARGS("cancelled");
+    }
+    TX_EXIT
+}
+
+/*!
+ \internal
+ Cancel the outstanding request.
+ */
+void MpApplicationMonitorPrivate::DoCancel()
+{
+    TX_ENTRY
+    iWsSession.EventReadyCancel();
+    TX_EXIT
+}
+
+/*!
+ \internal
+ */
+void MpApplicationMonitorPrivate::DoInitL()
+{
+    TX_ENTRY
+    CreateWindowGroupL();
+    StartMonitor();
+    TX_EXIT
+}
+
+/*!
+ \internal
+ */
+bool MpApplicationMonitorPrivate::DoIsApplicationRunningL()
+{
+    TX_ENTRY
+    bool taskExists = false;
+    CAknTaskList* taskList = CAknTaskList::NewL( iWsSession );
+    TApaTask task = taskList->FindRootApp( iHostUid );
+    delete taskList;
+    taskExists = task.Exists();
+    TX_LOG_ARGS("taskExists=" << taskExists);
+    return taskExists;
+}
+
+/*!
+ \internal
+ Creates a window group and hides it from the UI.
+ */
+void MpApplicationMonitorPrivate::CreateWindowGroupL()
+{
+    TX_ENTRY
+    User::LeaveIfError( iWsSession.Connect() );
+    RWindowGroup wg( iWsSession );
+    // Make a handle from the address of window group object
+    User::LeaveIfError( wg.Construct( reinterpret_cast<TUint32>( &wg ) ) );
+    User::LeaveIfError( wg.EnableGroupChangeEvents() );
+
+    // Get the ordinal position of this window group
+    const TInt ordPos( wg.OrdinalPosition() );
+    // Set priority so it's hidden in the UI
+    wg.SetOrdinalPosition( ordPos, KWindowGroupPriority );
+
+    // Needs to be a member variable. Must be closed in destructor.
+    // Otherwise can't monitor what has been opened.
+    iWindowGroup = wg;
+
+    iWsSession.Flush();
+    TX_EXIT
+}
+
+/*!
+ \internal
+ Starts event monitoring.
+ */
+void MpApplicationMonitorPrivate::StartMonitor()
+{
+    TX_ENTRY
+    Cancel();
+
+    iWsSession.EventReady( &iStatus );
+    SetActive();
+    TX_EXIT
+}
+