callcontinuity/vcchotrigger/src/vccsignallevelhandler.cpp
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Tue, 14 Sep 2010 21:02:05 +0300
branchRCL_3
changeset 23 755430a7d64b
parent 0 a4daefaec16c
permissions -rw-r--r--
Revision: 201033 Kit: 201035
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/*
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* Copyright (c) 2007-2008 Nokia Corporation and/or its subsidiary(-ies).
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* All rights reserved.
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* This component and the accompanying materials are made available
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* under the terms of "Eclipse Public License v1.0"
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* which accompanies this distribution, and is available
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* at the URL "http://www.eclipse.org/legal/epl-v10.html".
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*
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* Initial Contributors:
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* Nokia Corporation - initial contribution.
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*
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* Contributors:
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*
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* Description:   Implementation of the base class of signal level handler
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*
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*/
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#include "vccsignallevelhandler.h"
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#include "vccsignallevelobserver.h"
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#include "rubydebug.h"
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// Min. signal strength in absolut dBm, i.e. the value
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// in real world is -110 dBm (so quite weak).
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static const TInt32 KStrengthMin = 110;
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// ---------------------------------------------------------------------------
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// C++ destructor.
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// ---------------------------------------------------------------------------
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//
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CVccSignalLevelHandler::~CVccSignalLevelHandler()
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    {
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    // Cancel any outstanding requests.
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    Cancel();
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    iStrength = 0;
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    }
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// ---------------------------------------------------------------------------
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// Symbian second-phase constructor.
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// ---------------------------------------------------------------------------
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//
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void CVccSignalLevelHandler::ConstructL()
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    {
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    CTimer::ConstructL();
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    }
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// ---------------------------------------------------------------------------
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// C++ constructor.
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// ---------------------------------------------------------------------------
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//
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CVccSignalLevelHandler::CVccSignalLevelHandler(
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    MVccSignalLevelObserver& aObserver,
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    const TSignalLevelParams& aParams )
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    : CTimer( EPriorityStandard ),
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    iObserver( aObserver ),
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    iParams( aParams )
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    {
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    CActiveScheduler::Add( this );
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    }
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// ---------------------------------------------------------------------------
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// Star signal level observing.
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// ---------------------------------------------------------------------------
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//
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void CVccSignalLevelHandler::StartL()
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    {
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    RUBY_DEBUG_BLOCK( "CVccSignalLevelHandler::StartL" );
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    if ( !iNotificationsOn )
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        {
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        EnableNotificationsL();
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        iNotificationsOn = ETrue;
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        }
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    RUBY_DEBUG0( " -call Cancel()" );
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    Cancel();
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    RUBY_DEBUG0( " -call GetStrength()" );
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    GetStrength();
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    RUBY_DEBUG1( " -iStrength = %d, set op = EOperationGet \
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                 state = EStrengthUnknown", iStrength );
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    iOperation = EOperationGet;
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    iState = EStrengthUnknown;
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    RUBY_DEBUG0( " -call SetActive()" );
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    SetActive();
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    }
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// ---------------------------------------------------------------------------
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// Stop signal level observing.
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// ---------------------------------------------------------------------------
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//
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void CVccSignalLevelHandler::Stop()
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    {
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    RUBY_DEBUG_BLOCK( "CVccSignalLevelHandler::Stop ");
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    DisableNotifications();
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    iNotificationsOn = EFalse;
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    iStrength = 0;
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    Cancel();
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    }
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// ---------------------------------------------------------------------------
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// Set new parameters.
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// ---------------------------------------------------------------------------
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//
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void CVccSignalLevelHandler::SetParams( const TSignalLevelParams& aParams )
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parents:
diff changeset
   117
    {
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parents:
diff changeset
   118
    RUBY_DEBUG_BLOCK( "CVccSignalLevelHandler::SetParams" );
a4daefaec16c Revision: 201001
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parents:
diff changeset
   119
    iParams = aParams;
a4daefaec16c Revision: 201001
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parents:
diff changeset
   120
    }
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parents:
diff changeset
   121
a4daefaec16c Revision: 201001
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parents:
diff changeset
   122
// ---------------------------------------------------------------------------
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parents:
diff changeset
   123
// Handles getting the signal strength and notifying the observer about
a4daefaec16c Revision: 201001
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parents:
diff changeset
   124
// strength changes.
a4daefaec16c Revision: 201001
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parents:
diff changeset
   125
// ---------------------------------------------------------------------------
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Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   126
//
a4daefaec16c Revision: 201001
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parents:
diff changeset
   127
void CVccSignalLevelHandler::RunL()
a4daefaec16c Revision: 201001
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   128
    {
a4daefaec16c Revision: 201001
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parents:
diff changeset
   129
    RUBY_DEBUG_BLOCK( "CVccSignalLevelHandler::RunL" );
a4daefaec16c Revision: 201001
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   130
a4daefaec16c Revision: 201001
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   131
    // Zero (0) is not acceptable.
a4daefaec16c Revision: 201001
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parents:
diff changeset
   132
    if ( !iStrength )
a4daefaec16c Revision: 201001
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   133
        {
a4daefaec16c Revision: 201001
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   134
        RUBY_DEBUG0( " -0 strength not acceptable, setting to KStrengthMin");
a4daefaec16c Revision: 201001
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   135
        iStrength = KStrengthMin;
a4daefaec16c Revision: 201001
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   136
        }
a4daefaec16c Revision: 201001
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   137
a4daefaec16c Revision: 201001
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   138
    RUBY_DEBUG3( " -iStrength = %d iState = %d iOp = %d", iStrength, iState, iOperation );
a4daefaec16c Revision: 201001
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   139
a4daefaec16c Revision: 201001
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   140
    switch ( iOperation )
a4daefaec16c Revision: 201001
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   141
        {
a4daefaec16c Revision: 201001
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   142
        case EOperationGet:
a4daefaec16c Revision: 201001
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   143
            {
a4daefaec16c Revision: 201001
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   144
a4daefaec16c Revision: 201001
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   145
            // We are in the Get-mode to get the signal strength.
a4daefaec16c Revision: 201001
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   146
            // If the strength is < than the high level (== the strength
a4daefaec16c Revision: 201001
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   147
            // is good), start timer to check if we are still in good level
a4daefaec16c Revision: 201001
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   148
            // after the timer completes.
a4daefaec16c Revision: 201001
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   149
            // The same is done if we have a low level (== bad).
a4daefaec16c Revision: 201001
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   150
a4daefaec16c Revision: 201001
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   151
            RUBY_DEBUG0( " -EOperationGet");
a4daefaec16c Revision: 201001
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   152
a4daefaec16c Revision: 201001
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   153
            if ( iStrength <= iParams.iHighLevel && iStrength > 0 )
a4daefaec16c Revision: 201001
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   154
                {
a4daefaec16c Revision: 201001
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   155
                RUBY_DEBUG0( "  set state = EStrengthHigh, op = EOperationWait" );
a4daefaec16c Revision: 201001
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   156
a4daefaec16c Revision: 201001
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   157
                After( iParams.iHighTimeout );
a4daefaec16c Revision: 201001
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   158
                iState = EStrengthHigh;
a4daefaec16c Revision: 201001
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   159
                iOperation = EOperationWait;
a4daefaec16c Revision: 201001
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   160
                }
a4daefaec16c Revision: 201001
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   161
            else if ( iStrength >= iParams.iLowLevel )
a4daefaec16c Revision: 201001
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   162
                {
a4daefaec16c Revision: 201001
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   163
                RUBY_DEBUG0( "  set state = EStrengtLow, op = EOperationWait" );
a4daefaec16c Revision: 201001
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   164
                After( iParams.iLowTimeout );
a4daefaec16c Revision: 201001
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   165
                iState = EStrengthLow;
a4daefaec16c Revision: 201001
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   166
                iOperation = EOperationWait;
a4daefaec16c Revision: 201001
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   167
                }
a4daefaec16c Revision: 201001
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   168
            else
a4daefaec16c Revision: 201001
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   169
                {
a4daefaec16c Revision: 201001
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   170
                RUBY_DEBUG0( "  strength between low and high, set op = EOperationNone" );
a4daefaec16c Revision: 201001
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   171
a4daefaec16c Revision: 201001
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   172
                iOperation = EOperationNone;
a4daefaec16c Revision: 201001
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   173
                // PCLint
a4daefaec16c Revision: 201001
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   174
                }
a4daefaec16c Revision: 201001
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   175
            break;
a4daefaec16c Revision: 201001
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   176
            }
a4daefaec16c Revision: 201001
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   177
a4daefaec16c Revision: 201001
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   178
        case EOperationWait:
a4daefaec16c Revision: 201001
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   179
            {
a4daefaec16c Revision: 201001
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   180
a4daefaec16c Revision: 201001
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   181
            // Timer has completed. Check the signal level again.
a4daefaec16c Revision: 201001
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   182
a4daefaec16c Revision: 201001
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   183
            RUBY_DEBUG0( " -EOperationWait" );
a4daefaec16c Revision: 201001
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   184
            RUBY_DEBUG0( "  set op = EOperationComplete" );
a4daefaec16c Revision: 201001
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   185
            GetStrength();
a4daefaec16c Revision: 201001
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   186
a4daefaec16c Revision: 201001
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   187
            SetActive();
a4daefaec16c Revision: 201001
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   188
a4daefaec16c Revision: 201001
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   189
            iOperation = EOperationComplete;
a4daefaec16c Revision: 201001
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   190
a4daefaec16c Revision: 201001
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   191
            break;
a4daefaec16c Revision: 201001
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   192
            }
a4daefaec16c Revision: 201001
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   193
a4daefaec16c Revision: 201001
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   194
        case EOperationComplete:
a4daefaec16c Revision: 201001
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   195
            {
a4daefaec16c Revision: 201001
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   196
            // Checking signal strength is now done.
a4daefaec16c Revision: 201001
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   197
            // Notify our observer (if needed).
a4daefaec16c Revision: 201001
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   198
a4daefaec16c Revision: 201001
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   199
            RUBY_DEBUG1( " -EOperationComplete, iStrength = %d", iStrength );
a4daefaec16c Revision: 201001
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   200
a4daefaec16c Revision: 201001
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   201
            // Do we have a good signal level?
a4daefaec16c Revision: 201001
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   202
            if ( iStrength <= iParams.iHighLevel && iStrength > 0 && iState == EStrengthHigh )
a4daefaec16c Revision: 201001
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   203
                {
a4daefaec16c Revision: 201001
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   204
                RUBY_DEBUG0( " -if ( iStrength <= iParams.iHighLevel" );
a4daefaec16c Revision: 201001
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   205
                NotifyChanges( iStrength, MVccSignalLevelObserver::ESignalClassNormal );
a4daefaec16c Revision: 201001
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   206
                }
a4daefaec16c Revision: 201001
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   207
            // Or do we have a bad signal level?
a4daefaec16c Revision: 201001
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   208
            else if ( iStrength >= iParams.iHighLevel && iState == EStrengthLow )
a4daefaec16c Revision: 201001
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   209
                {
a4daefaec16c Revision: 201001
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   210
                RUBY_DEBUG0( " -else if ( iStrength >= iParams.iHighLevel" );
a4daefaec16c Revision: 201001
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   211
                NotifyChanges( iStrength, MVccSignalLevelObserver::ESignalClassWeak );
a4daefaec16c Revision: 201001
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   212
                }
a4daefaec16c Revision: 201001
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   213
            else
a4daefaec16c Revision: 201001
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   214
                {
a4daefaec16c Revision: 201001
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   215
                // PCLint
a4daefaec16c Revision: 201001
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   216
                }
a4daefaec16c Revision: 201001
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   217
a4daefaec16c Revision: 201001
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   218
            iOperation = EOperationNone;
a4daefaec16c Revision: 201001
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   219
a4daefaec16c Revision: 201001
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   220
            break;
a4daefaec16c Revision: 201001
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   221
            }
a4daefaec16c Revision: 201001
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   222
a4daefaec16c Revision: 201001
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   223
        default:
a4daefaec16c Revision: 201001
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   224
            {
a4daefaec16c Revision: 201001
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   225
            break;
a4daefaec16c Revision: 201001
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   226
            }
a4daefaec16c Revision: 201001
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   227
        }
a4daefaec16c Revision: 201001
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   228
    }
a4daefaec16c Revision: 201001
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   229
a4daefaec16c Revision: 201001
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   230
// ---------------------------------------------------------------------------
a4daefaec16c Revision: 201001
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   231
// Handles signal strength changes notified by the subsystem
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// (either the WLAN or the GSM).
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// ---------------------------------------------------------------------------
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//
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void CVccSignalLevelHandler::StrengthChanged()
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    {
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    RUBY_DEBUG_BLOCK( "CVccSignalLevelHandler::StrengthChanged" );
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    // The zero (0) is not good.
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    if ( !iStrength )
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        {
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        iStrength = KStrengthMin;
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        }
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    RUBY_DEBUG3( " -iStrength = %d, iState = %d, iOp = %d",
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                             iStrength, iState, iOperation);
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    // Check in which direction the signal strength changed
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    // and start the timeout timer to see if the signal level
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    // stays at that (new) level.
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    RUBY_DEBUG1( " -iHighLevel = %d", iParams.iHighLevel );
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    RUBY_DEBUG1( " -iLowLevel = %d", iParams.iLowLevel );
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    if ( iStrength <= iParams.iHighLevel && iStrength > 0 )  // && 
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        //( iState == EStrengthLow || iState == EStrengthUnknown ) )
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        {
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        // Cancel outstanding timer in all the cases
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        Cancel();
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        // We have a good level after a bad one.
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        RUBY_DEBUG0( " -call After( hightimeout ), set state = High, op = Wait");
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        After( iParams.iHighTimeout );
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        iState = EStrengthHigh;
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        iOperation = EOperationWait;
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        }
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    else if ( iStrength >= iParams.iLowLevel )  //&& 
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            //( iState == EStrengthHigh || iState == EStrengthUnknown ) )
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        {
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        // Cancel outstanding timer in all the cases
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        Cancel();
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        // We have a bad level after a good one.
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        RUBY_DEBUG0( " -call After( lowtimeout ), set state = Low, op = Wait");
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        After ( iParams.iLowTimeout );
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        iState = EStrengthLow;
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        iOperation = EOperationWait;
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        }
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    else
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        {
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        RUBY_DEBUG0( "-EOperationNone ");
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        iOperation = EOperationNone;
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        }
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    }
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// ---------------------------------------------------------------------------
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// Cancel outstanding requests.
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// ---------------------------------------------------------------------------
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//
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void CVccSignalLevelHandler::DoCancel()
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    {
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    RUBY_DEBUG_BLOCK( "CVccSignalLevelHandler::DoCancel" );
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    switch ( iOperation )
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   295
        {
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        case EOperationWait:
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   297
            {
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            RUBY_DEBUG0( "EOperationWait" );
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            CTimer::DoCancel();
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   300
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   301
            break;
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   302
            }
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   303
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   304
        case EOperationGet:
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            // fall-through intended here
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        case EOperationComplete:
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   307
            {
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            RUBY_DEBUG0( "EOperationGet / EOperationComplete" );
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            CancelGetStrength();
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   310
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            break;
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   312
            }
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   313
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   314
        default:
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   315
            {
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   316
            break;
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   317
            }
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   318
        }
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   319
    }