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neosuspend.cpp
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neosuspend.cpp
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/****************************************************************************
**
** This file is part of the Qt Extended Opensource Package.
**
** Copyright (C) 2009 Trolltech ASA.
**
** Contact: Qt Extended Information (info@qtextended.org)
**
** This file may be used under the terms of the GNU General Public License
** version 2.0 as published by the Free Software Foundation and appearing
** in the file LICENSE.GPL included in the packaging of this file.
**
** Please review the following information to ensure GNU General Public
** Licensing requirements will be met:
** http://www.fsf.org/licensing/licenses/info/GPLv2.html.
**
**
****************************************************************************/
#include <QtopiaIpcAdaptor>
#include <QtopiaIpcEnvelope>
#include <QtopiaServiceRequest>
#include <QPowerSource>
#include <QProcess>
#include <stdio.h>
#include <stdlib.h>
#include <QDesktopWidget>
#include <QTimer>
#include "systemsuspend.h"
#include <qvaluespace.h>
#ifdef Q_WS_QWS
#include <qwindowsystem_qws.h>
#endif
class NeoSuspend : public SystemSuspendHandler
{
public:
NeoSuspend();
virtual bool canSuspend() const;
virtual bool suspend();
virtual bool wake();
private:
QProcess resumeScript;
QValueSpaceObject batteryVso;
QDateTime suspendTime;
int chargeNowBeforeSuspend;
};
QTOPIA_DEMAND_TASK(NeoSuspend, NeoSuspend);
QTOPIA_TASK_PROVIDES(NeoSuspend, SystemSuspendHandler);
NeoSuspend::NeoSuspend()
: resumeScript(this)
, batteryVso("/UI/Battery", this)
{
}
bool NeoSuspend::canSuspend() const
{
/* QPowerSource src( QLatin1String("DefaultBattery") );
return !src.charging();
*/
/* Make sure resume script is finished */
bool ok = (resumeScript.state() == QProcess::NotRunning);
if(!ok) {
qLog(PowerManagement) << "Cant suspend, resume script is running, state=" << resumeScript.state();
}
return ok;
}
static int readChargeNow()
{
QString chargeNowStr =
qReadFile("/sys/class/power_supply/battery/charge_now");
return chargeNowStr.toInt();
}
bool NeoSuspend::suspend()
{
qLog(PowerManagement)<< __PRETTY_FUNCTION__;
QProcess::execute("before-suspend.sh");
chargeNowBeforeSuspend = readChargeNow();
suspendTime = QDateTime::currentDateTime();
Qtopia::writeFile("/sys/power/state", "mem", 3, false);
return true;
}
bool NeoSuspend::wake()
{
// Average current in suspend computed from charge_now and suspend time
QDateTime now = QDateTime::currentDateTime();
int chargeNow = readChargeNow();
int secs = suspendTime.secsTo(now);
if(secs == 0)
secs++;
int avgCurrent = ((chargeNowBeforeSuspend - chargeNow) * 36) / (10 * secs); // (first_number - last_number) * 3600 / (last_timestamp - first_timestamp), but we want it in mA so 1000x less
batteryVso.setAttribute("avg_current_in_suspend", QString::number(avgCurrent));
// Actual current_now
QString currentNowStr =
qReadFile("/sys/class/power_supply/battery/current_now");
int currentNow = currentNowStr.toInt() / 1000;
batteryVso.setAttribute("current_now_in_suspend", QString::number(currentNow));
#ifdef Q_WS_QWS
QWSServer::instance()->refresh();
#endif
QtopiaIpcEnvelope("QPE/Card", "mtabChanged()" ); // might have changed while asleep
//screenSaverActivate uses QTimer which depends on hwclock update
//when the device wakes up. The clock update is another event in the
//Qt event loop (see qeventdispatcher_unix.cpp. We have to call
//processEvents to give Qt a chance to sync its internal timer with
//the hw clock
#ifdef Q_WS_QWS
QCoreApplication::processEvents(QEventLoop::ExcludeUserInputEvents);
QWSServer::screenSaverActivate( false );
{
QtopiaIpcEnvelope("QPE/Card", "mtabChanged()" ); // might have changed while asleep
QtopiaServiceRequest e("QtopiaPowerManager", "setBacklight(int)");
e << -3; // Force on
e.send();
QtopiaIpcEnvelope("QPE/NetworkState", "updateNetwork()"); //might have changed
}
#endif
/* No waitForFinished after start, because we want the command to complete
in the background */
resumeScript.start("after-resume.sh");
return true;
}