1 /*

     2 * Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies).

     3 * All rights reserved.

     4 * This component and the accompanying materials are made available

     5 * under the terms of "Eclipse Public License v1.0"

     6 * which accompanies this distribution, and is available

     7 * at the URL "http://www.eclipse.org/legal/epl-v10.html".

     8 *

     9 * Initial Contributors:

    10 * Nokia Corporation - initial contribution.

    11 *

    12 * Contributors:

    13 *

    14 * Description: Music Player application monitor utility - private implementation.

    15 *

    16 */

    17 

    18 #include <apgtask.h>

    19 #include <AknTaskList.h>

    20 

    21 #include "mpapplicationmonitor_p.h"

    22 #include "mpapplicationmonitor.h"

    23 #include "mptrace.h"

    24 

    25 // -1 means the window will never be visible.

    26 const TInt KWindowGroupPriority = -1;

    27 

    28 /*!

    29     \class MpApplicationMonitorPrivate

    30     \brief Music Player application monitor utility - private implementation.

    31 

    32 

    33 */

    34 

    35 /*!

    36  Constructor

    37  */

    38 MpApplicationMonitorPrivate::MpApplicationMonitorPrivate( MpApplicationMonitor *qq )

    39     : CActive( CActive::EPriorityStandard ),

    40       q_ptr( qq )

    41 {

    42     TX_ENTRY_ARGS( "Q pointer=" << ( void * )qq )

    43     CActiveScheduler::Add( this );

    44     TX_EXIT

    45 }

    46 

    47 /*!

    48  Destructor

    49  */

    50 MpApplicationMonitorPrivate::~MpApplicationMonitorPrivate()

    51 {

    52     TX_LOG

    53     // Cancel any outstanding request

    54     Cancel();

    55 

    56     iWindowGroup.Close();

    57     iWsSession.Close();

    58     TX_EXIT

    59 }

    60 

    61 /*!

    62  \internal

    63  */

    64 void MpApplicationMonitorPrivate::init( quint32 clientSecureId )

    65 {

    66     TX_ENTRY

    67     iHostUid = TUid::Uid( clientSecureId );

    68     TRAPD( err, DoInitL() );

    69     if ( err != KErrNone ) {

    70         TX_LOG_ARGS( "Error: " << err << "; should never get here." );

    71     }

    72     TX_EXIT

    73 }

    74 

    75 /*!

    76  Request if music player application is running.

    77  */

    78 bool MpApplicationMonitorPrivate::isApplicationRunning()

    79 {

    80     TX_ENTRY

    81     bool running = false;

    82     TRAPD( err, running = DoIsApplicationRunningL() );

    83     if ( err != KErrNone ) {

    84         TX_LOG_ARGS( "Error: " << err << "; should never get here." );

    85     }

    86     TX_EXIT

    87     return running;

    88 }

    89 

    90 /*!

    91  \internal

    92  Checks if the chosen app is launched

    93  */

    94 void MpApplicationMonitorPrivate::RunL()

    95     {

    96     // Get the status of this object.

    97     const TInt errCode( iStatus.Int() );

    98     TX_ENTRY_ARGS("Status=" << errCode);

    99 

   100     if ( KErrNone == errCode ) {

   101         TWsEvent event;

   102         iWsSession.GetEvent( event );

   103         if ( event.Type() == EEventWindowGroupsChanged ) {

   104             emit q_ptr->applicationStatusChanged( isApplicationRunning() );

   105         }

   106         TX_LOG_ARGS("OK, renewing request");

   107         StartMonitor();

   108     }

   109     else if ( KErrCancel != errCode ) {

   110         TX_LOG_ARGS("Renewing request after error: " << errCode);

   111         StartMonitor();

   112     }

   113     else {

   114         TX_LOG_ARGS("cancelled");

   115     }

   116     TX_EXIT

   117 }

   118 

   119 /*!

   120  \internal

   121  Cancel the outstanding request.

   122  */

   123 void MpApplicationMonitorPrivate::DoCancel()

   124 {

   125     TX_ENTRY

   126     iWsSession.EventReadyCancel();

   127     TX_EXIT

   128 }

   129 

   130 /*!

   131  \internal

   132  */

   133 void MpApplicationMonitorPrivate::DoInitL()

   134 {

   135     TX_ENTRY

   136     CreateWindowGroupL();

   137     StartMonitor();

   138     TX_EXIT

   139 }

   140 

   141 /*!

   142  \internal

   143  */

   144 bool MpApplicationMonitorPrivate::DoIsApplicationRunningL()

   145 {

   146     TX_ENTRY

   147     bool taskExists = false;

   148     CAknTaskList* taskList = CAknTaskList::NewL( iWsSession );

   149     TApaTask task = taskList->FindRootApp( iHostUid );

   150     delete taskList;

   151     taskExists = task.Exists();

   152     TX_LOG_ARGS("taskExists=" << taskExists);

   153     return taskExists;

   154 }

   155 

   156 /*!

   157  \internal

   158  Creates a window group and hides it from the UI.

   159  */

   160 void MpApplicationMonitorPrivate::CreateWindowGroupL()

   161 {

   162     TX_ENTRY

   163     User::LeaveIfError( iWsSession.Connect() );

   164     RWindowGroup wg( iWsSession );

   165     // Make a handle from the address of window group object

   166     User::LeaveIfError( wg.Construct( reinterpret_cast<TUint32>( &wg ) ) );

   167     User::LeaveIfError( wg.EnableGroupChangeEvents() );

   168 

   169     // Get the ordinal position of this window group

   170     const TInt ordPos( wg.OrdinalPosition() );

   171     // Set priority so it's hidden in the UI

   172     wg.SetOrdinalPosition( ordPos, KWindowGroupPriority );

   173 

   174     // Needs to be a member variable. Must be closed in destructor.

   175     // Otherwise can't monitor what has been opened.

   176     iWindowGroup = wg;

   177 

   178     iWsSession.Flush();

   179     TX_EXIT

   180 }

   181 

   182 /*!

   183  \internal

   184  Starts event monitoring.

   185  */

   186 void MpApplicationMonitorPrivate::StartMonitor()

   187 {

   188     TX_ENTRY

   189     Cancel();

   190 

   191     iWsSession.EventReady( &iStatus );

   192     SetActive();

   193     TX_EXIT

   194 }

   195