bluetoothengine/btui/btuidelegate/btdelegatevisibility.cpp
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Tue, 31 Aug 2010 15:25:10 +0300
branchRCL_3
changeset 55 613943a21004
permissions -rw-r--r--
Revision: 201033 Kit: 201035
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/*
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* Copyright (c) 2010 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: Delegate class for setting visibility mode
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*
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*/
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#include "btdelegatevisibility.h"
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#include <btsettingmodel.h>
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#include <btdevicemodel.h>
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#include <bluetoothuitrace.h>
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#include "btqtconstants.h"
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#include <btengsettings.h>
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const int MAX_TEMPORARY_VISIBILITY = 60;  // minutes, this value comes from the UI spec
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/*!
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    Constructor.
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 */
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BtDelegateVisibility::BtDelegateVisibility(
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        QObject *parent )
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    : BtAbstractDelegate( NULL, NULL, parent )
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{
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    TRAP_IGNORE( mBtengSettings = CBTEngSettings::NewL(this) );
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    Q_CHECK_PTR( mBtengSettings );
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    mActiveHandling = false;
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}
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/*!
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    Destructor.
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 */
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BtDelegateVisibility::~BtDelegateVisibility()
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{
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    delete mBtengSettings;
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}
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/*!
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 * executes visibility delegate functionality, ie. calls CBTEngSettings to set the visibility mode;
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 * when operation completes, emits commandCompleted signal
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 * Parameters:  Qlist<QVariant> where first item is VisibilityMode integer specifying operation;  
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 *              for BtTemporary a 2nd parameter is give which signifies the number of minutes to stay visible.
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 */
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void BtDelegateVisibility::exec( const QVariant &params )
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{
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    int minutes, err = 0;
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    if (mActiveHandling) {
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        // complete command with error
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        emit commandCompleted(KErrInUse);
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        return;
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    } 
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    mActiveHandling = true;
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    // read 1st parameter
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    BTUI_ASSERT_X(params.toList().at(0).isValid(), "BtDelegateVisibility::exec", "invalid parameter");
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    VisibilityMode btQtMode = (VisibilityMode)params.toList().at(0).toInt();
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    mOperation = BtEngVisibilityMode(btQtMode);
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    // verify that we are setting visibility to a new value, otherwise we won't get a callback
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    TBTVisibilityMode visibilityMode( EBTVisibilityModeNoScans );
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    err = mBtengSettings->GetVisibilityMode( visibilityMode );
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    if (err) {
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        mActiveHandling = false;
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        emit commandCompleted(err);
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        return;
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    }
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    if (visibilityMode == mOperation) {
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        mActiveHandling = false;
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        emit commandCompleted(KErrNone);
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        return;
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    }
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    switch (mOperation) {
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    case EBTVisibilityModeGeneral :
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        err = mBtengSettings->SetVisibilityMode(mOperation, 0);
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        break;
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    case EBTVisibilityModeHidden:
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        err = mBtengSettings->SetVisibilityMode(mOperation, 0);
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        break;
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    case EBTVisibilityModeTemporary:
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        BTUI_ASSERT_X(params.toList().at(1).isValid(), "BtDelegateVisibility::exec", "invalid time parameter");
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        minutes = params.toList().at(1).toInt();
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        BTUI_ASSERT_X(((minutes >= 0 ) && (minutes <= MAX_TEMPORARY_VISIBILITY)), 
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                "BtDelegateVisibility::exec", "invalid time parameter");
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        err = mBtengSettings->SetVisibilityMode(mOperation, minutes);
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        break;
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    default:
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        // error
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        BTUI_ASSERT_X(false, "BtDelegateVisibility::exec", "invalid parameter");
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    }
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    if (err) {
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        // complete command with error
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        mActiveHandling = false;
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        emit commandCompleted(err);
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    }
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}
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void BtDelegateVisibility::PowerStateChanged( TBTPowerStateValue aState )
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{
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    Q_UNUSED( aState );
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}
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/*!
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 * callback from BtEngine
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 *    emits command complete with either: 
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 *    1) KErrUnknown if something went wrong, or
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 *    2) KErrNone if everything ok 
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 */
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void BtDelegateVisibility::VisibilityModeChanged( TBTVisibilityMode aState )
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{
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    if (mActiveHandling) {
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        //Error handling has to be done, if value is not set properly.
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        mActiveHandling = false;
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        if (mOperation == aState) {
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            emit commandCompleted(KErrNone);
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        }
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        else {
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            emit commandCompleted(KErrUnknown);
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        }
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    }
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}