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Diffstat (limited to 'src/monitor-lib/cpustatus.cpp')
-rw-r--r-- | src/monitor-lib/cpustatus.cpp | 148 |
1 files changed, 148 insertions, 0 deletions
diff --git a/src/monitor-lib/cpustatus.cpp b/src/monitor-lib/cpustatus.cpp new file mode 100644 index 00000000..5bf2729c --- /dev/null +++ b/src/monitor-lib/cpustatus.cpp @@ -0,0 +1,148 @@ +/**************************************************************************** +** +** Copyright (C) 2018 Pelagicore AG +** Contact: https://www.qt.io/licensing/ +** +** This file is part of the Pelagicore Application Manager. +** +** $QT_BEGIN_LICENSE:LGPL-QTAS$ +** Commercial License Usage +** Licensees holding valid commercial Qt Automotive Suite licenses may use +** this file in accordance with the commercial license agreement provided +** with the Software or, alternatively, in accordance with the terms +** contained in a written agreement between you and The Qt Company. For +** licensing terms and conditions see https://www.qt.io/terms-conditions. +** For further information use the contact form at https://www.qt.io/contact-us. +** +** GNU Lesser General Public License Usage +** Alternatively, this file may be used under the terms of the GNU Lesser +** General Public License version 3 as published by the Free Software +** Foundation and appearing in the file LICENSE.LGPL3 included in the +** packaging of this file. Please review the following information to +** ensure the GNU Lesser General Public License version 3 requirements +** will be met: https://www.gnu.org/licenses/lgpl-3.0.html. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU +** General Public License version 2.0 or (at your option) the GNU General +** Public license version 3 or any later version approved by the KDE Free +** Qt Foundation. The licenses are as published by the Free Software +** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3 +** included in the packaging of this file. Please review the following +** information to ensure the GNU General Public License requirements will +** be met: https://www.gnu.org/licenses/gpl-2.0.html and +** https://www.gnu.org/licenses/gpl-3.0.html. +** +** $QT_END_LICENSE$ +** +** SPDX-License-Identifier: LGPL-3.0 +** +****************************************************************************/ + +#include "cpustatus.h" + +#include <QThread> + +/*! + \qmltype CpuStatus + \inqmlmodule QtApplicationManager + \ingroup common-instantiatable + \brief Provides information on the CPU status. + + As the name implies, CpuStatus provides information on the status of the CPU. Its property values + are updated whenever the method update() is called. + + You can use this component as a MonitorModel data source if you want to plot its + previous values over time. + + \qml + import QtQuick 2.11 + import QtApplicationManager 1.0 + ... + MonitorModel { + CpuStatus {} + } + \endqml + + You can also use it alongside a Timer for instance, when you're only interested in its current value. + + \qml + import QtQuick 2.11 + import QtApplicationManager 1.0 + ... + CpuStatus { id: cpuStatus } + Timer { + interval: 500 + running: true + repeat: true + onTriggered: cpuStatus.update() + } + Text { + property string loadPercent: Number(cpuStatus.cpuLoad * 100).toLocaleString(Qt.locale("en_US"), 'f', 1) + text: "cpuLoad: " + loadPercent + "%" + } + \endqml +*/ + +QT_USE_NAMESPACE_AM + +CpuStatus::CpuStatus(QObject *parent) + : QObject(parent) + , m_cpuReader(new CpuReader) + , m_cpuLoad(0) +{ +} + +/*! + \qmlproperty real CpuStatus::cpuLoad + \readonly + + The CPU utilization when update() was last called, as a value ranging from 0 (inclusive, completely + idle) to 1 (inclusive, fully busy). + + \sa CpuStatus::update +*/ +qreal CpuStatus::cpuLoad() const +{ + return m_cpuLoad; +} + +/*! + \qmlproperty int CpuStatus::cpuCores + \readonly + + The number of physical CPU cores that are installed on the system. +*/ +int CpuStatus::cpuCores() const +{ + return QThread::idealThreadCount(); +} + +/*! + \qmlmethod CpuStatus::update + + Updates the cpuLoad property. + + \sa CpuStatus::cpuLoad +*/ +void CpuStatus::update() +{ + qreal newLoad = m_cpuReader->readLoadValue(); + if (newLoad != m_cpuLoad) { + m_cpuLoad = newLoad; + emit cpuLoadChanged(); + } +} + +/*! + \qmlproperty list<string> CpuStatus::roleNames + \readonly + + Names of the roles provided by CpuStatus when used as a MonitorModel data source. + + \sa MonitorModel +*/ +QStringList CpuStatus::roleNames() const +{ + return { qSL("cpuLoad") }; +} |