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/* BEGIN_COMMON_COPYRIGHT_HEADER
* (c)LGPL2+
*
* LXQt - a lightweight, Qt based, desktop toolset
* https://lxqt.org
*
* Copyright: 2012 Razor team
* Authors:
* Alexander Sokoloff <sokoloff.a@gmail.com>
*
* This program or library is free software; you can redistribute it
* and/or modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
* You should have received a copy of the GNU Lesser General
* Public License along with this library; if not, write to the
* Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301 USA
*
* END_COMMON_COPYRIGHT_HEADER */
#include "lxqtcpuload.h"
#include "../panel/ilxqtpanelplugin.h"
#include "../panel/pluginsettings.h"
#include <QPainter>
#include <QLinearGradient>
#include <QHBoxLayout>
extern "C" {
#include <statgrab.h>
}
#ifdef __sg_public
// since libstatgrab 0.90 this macro is defined, so we use it for version check
#define STATGRAB_NEWER_THAN_0_90 1
#endif
#define BAR_ORIENT_BOTTOMUP "bottomUp"
#define BAR_ORIENT_TOPDOWN "topDown"
#define BAR_ORIENT_LEFTRIGHT "leftRight"
#define BAR_ORIENT_RIGHTLEFT "rightLeft"
LXQtCpuLoad::LXQtCpuLoad(ILXQtPanelPlugin* plugin, QWidget* parent):
QFrame(parent),
mPlugin(plugin),
m_avg(0),
m_showText(false),
m_barWidth(20),
m_barOrientation(TopDownBar),
m_timerID(-1)
{
setObjectName(QStringLiteral("LXQtCpuLoad"));
QHBoxLayout *layout = new QHBoxLayout(this);
layout->setSpacing(0);
layout->setContentsMargins(0, 0, 0, 0);
layout->addWidget(&m_stuff);
/* Initialise statgrab */
#ifdef STATGRAB_NEWER_THAN_0_90
sg_init(0);
#else
sg_init();
#endif
/* Drop setuid/setgid privileges. */
if (sg_drop_privileges() != 0) {
perror("Error. Failed to drop privileges");
}
m_font.setPointSizeF(8);
settingsChanged();
}
LXQtCpuLoad::~LXQtCpuLoad()
{
sg_shutdown();
}
void LXQtCpuLoad::setSizes()
{
if (m_barOrientation == RightToLeftBar || m_barOrientation == LeftToRightBar)
{
m_stuff.setFixedHeight(m_barWidth);
m_stuff.setMinimumWidth(24);
}
else
{
m_stuff.setFixedWidth(m_barWidth);
m_stuff.setMinimumHeight(24);
}
}
void LXQtCpuLoad::resizeEvent(QResizeEvent *)
{
setSizes();
update();
}
double LXQtCpuLoad::getLoadCpu() const
{
#ifdef STATGRAB_NEWER_THAN_0_90
size_t count;
sg_cpu_percents* cur = sg_get_cpu_percents(&count);
#else
sg_cpu_percents* cur = sg_get_cpu_percents();
#endif
return (cur->user + cur->kernel + cur->nice);
}
void LXQtCpuLoad::timerEvent(QTimerEvent * /*event*/)
{
double avg = getLoadCpu();
if ( qAbs(m_avg-avg)>1 )
{
m_avg = avg;
setToolTip(tr("CPU load %1%").arg(m_avg));
update();
}
}
void LXQtCpuLoad::paintEvent ( QPaintEvent * )
{
QPainter p(this);
QPen pen;
pen.setWidth(2);
p.setPen(pen);
p.setRenderHint(QPainter::Antialiasing, true);
p.setFont(m_font);
QRectF r = rect();
QRectF r1;
QLinearGradient shade(0, 0, 1, 1);
if (m_barOrientation == RightToLeftBar || m_barOrientation == LeftToRightBar)
{
float vo = (r.height() - static_cast<double>(m_barWidth))/2.0;
float ho = r.width()*(1-m_avg*0.01);
if (m_barOrientation == RightToLeftBar)
{
r1.setRect(r.left()+ho, r.top()+vo, r.width()-ho, r.height()-2*vo );
}
else // LeftToRightBar
{
r1.setRect(r.left(), r.top()+vo, r.width()-ho, r.height()-2*vo );
}
shade.setFinalStop(0, r1.height());
}
else // BottomUpBar || TopDownBar
{
float vo = r.height()*(1-m_avg*0.01);
float ho = (r.width() - static_cast<double>(m_barWidth) )/2.0;
if (m_barOrientation == TopDownBar)
{
r1.setRect(r.left()+ho, r.top(), r.width()-2*ho, r.height()-vo );
}
else // BottomUpBar
{
r1.setRect(r.left()+ho, r.top()+vo, r.width()-2*ho, r.height()-vo );
}
shade.setFinalStop(r1.width(), 0);
}
shade.setSpread(QLinearGradient::ReflectSpread);
shade.setColorAt(0, QColor(0, 196, 0, 128));
shade.setColorAt(0.5, QColor(0, 128, 0, 255) );
shade.setColorAt(1, QColor(0, 196, 0 , 128));
p.fillRect(r1, shade);
if (m_showText)
{
p.setPen(fontColor);
p.drawText(rect(), Qt::AlignCenter, QString::number(m_avg));
}
}
void LXQtCpuLoad::settingsChanged()
{
if (m_timerID != -1)
killTimer(m_timerID);
m_showText = mPlugin->settings()->value(QStringLiteral("showText"), false).toBool();
m_barWidth = mPlugin->settings()->value(QStringLiteral("barWidth"), 20).toInt();
m_updateInterval = mPlugin->settings()->value(QStringLiteral("updateInterval"), 1000).toInt();
QString barOrientation = mPlugin->settings()->value(QStringLiteral("barOrientation"), QStringLiteral(BAR_ORIENT_BOTTOMUP)).toString();
if (barOrientation == QLatin1String(BAR_ORIENT_RIGHTLEFT))
m_barOrientation = RightToLeftBar;
else if (barOrientation == QLatin1String(BAR_ORIENT_LEFTRIGHT))
m_barOrientation = LeftToRightBar;
else if (barOrientation == QLatin1String(BAR_ORIENT_TOPDOWN))
m_barOrientation = TopDownBar;
else
m_barOrientation = BottomUpBar;
m_timerID = startTimer(m_updateInterval);
setSizes();
update();
}
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