ginebra2/SystemDeviceImpl.cpp
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Tue, 06 Jul 2010 14:03:49 +0300
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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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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation, version 2.1 of the License.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this program.  If not,
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* see "http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html/".
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*
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* Description:
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* This file implements the SystemDeviceImpl class.
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*/
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#include <QList>
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#include <QString>
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#include "SystemDeviceImpl.h"
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#include "Utilities.h"
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namespace GVA {
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SystemDeviceImpl::SystemDeviceImpl()
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{
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    // create Qt Mobility API objects for device info
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    m_deviceInfo = new QSystemDeviceInfo(this);
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    // When the m_deviceInfo signals battery level changed,
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    // DeviceDelegate emits batteryLevelChanged
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    safe_connect(m_deviceInfo, SIGNAL(batteryLevelChanged(int)),
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                 this, SIGNAL(batteryLevelChanged(int)));
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    // set current charging state then keep it up to date with signal handler
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    m_batteryCharging = (m_deviceInfo->currentPowerState() ==
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        QSystemDeviceInfo::WallPowerChargingBattery) ? true : false;
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    safe_connect(m_deviceInfo, SIGNAL(powerStateChanged(QSystemDeviceInfo::PowerState)),
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                 this, SLOT(handlePowerStateChanged(QSystemDeviceInfo::PowerState)));
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}
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SystemDeviceImpl::~SystemDeviceImpl()
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{
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    // clean up
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    delete m_deviceInfo;
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}
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//! Get the current battery level.
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int SystemDeviceImpl::getBatteryLevel() const
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{
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    return (m_deviceInfo->batteryLevel());
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}
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//! Handles the powerStateChanged signal from system device info.
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/*!
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  \param state new power state
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*/
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void SystemDeviceImpl::handlePowerStateChanged(QSystemDeviceInfo::PowerState state)
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{
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    bool batteryCharging =
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        (state == QSystemDeviceInfo::WallPowerChargingBattery) ? true : false;
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    if (batteryCharging != m_batteryCharging) {
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        m_batteryCharging = batteryCharging;
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        //qDebug() << "DeviceDelegate: new charging = " << m_batteryCharging;
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        // emit battery level - subscriber will get charging state if desired
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        emit batteryLevelChanged(m_deviceInfo->batteryLevel());
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    }
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}
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} // GVA
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