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tdebase/kcontrol/energy/energy.cpp

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/* vi: ts=8 sts=4 sw=4
*
*
*
* This file is part of the KDE project, module kcontrol.
* Copyright (C) 1999 Geert Jansen <g.t.jansen@stud.tue.nl>
*
* You can Freely distribute this program under the GNU General Public
* License. See the file "COPYING" for the exact licensing terms.
*
* Based on kcontrol1 energy.cpp, Copyright (c) 1999 Tom Vijlbrief
*/
/*
* KDE Energy setup module.
*/
#include <config.h>
#if !defined(QT_CLEAN_NAMESPACE)
#define QT_CLEAN_NAMESPACE
#endif
#include <qcheckbox.h>
#include <qlabel.h>
#include <qlayout.h>
#include <qwhatsthis.h>
#include <kconfig.h>
#include <kcursor.h>
#include <kdialog.h>
#include <kiconloader.h>
#include <klocale.h>
#include <knuminput.h>
#include <krun.h>
#include <kstandarddirs.h>
#include <kurllabel.h>
#include <X11/X.h>
#include <X11/Xlib.h>
#include <X11/Xatom.h>
#include <X11/Xutil.h>
#include <X11/Xos.h>
#include "energy.h"
#ifdef HAVE_DPMS
#include <X11/Xmd.h>
extern "C" {
#include <X11/extensions/dpms.h>
Status DPMSInfo ( Display *, CARD16 *, BOOL * );
Bool DPMSCapable( Display * );
int __kde_do_not_unload = 1;
#ifndef HAVE_DPMSCAPABLE_PROTO
Bool DPMSCapable ( Display * );
#endif
#ifndef HAVE_DPMSINFO_PROTO
Status DPMSInfo ( Display *, CARD16 *, BOOL * );
#endif
}
#if defined(XIMStringConversionRetrival) || defined (__sun) || defined(__hpux)
extern "C" {
#endif
Bool DPMSQueryExtension(Display *, int *, int *);
Status DPMSEnable(Display *);
Status DPMSDisable(Display *);
Bool DPMSGetTimeouts(Display *, CARD16 *, CARD16 *, CARD16 *);
Bool DPMSSetTimeouts(Display *, CARD16, CARD16, CARD16);
#if defined(XIMStringConversionRetrival) || defined (__sun) || defined(__hpux)
}
#endif
#endif
static const int DFLT_STANDBY = 0;
static const int DFLT_SUSPEND = 30;
static const int DFLT_OFF = 60;
/**** DLL Interface ****/
extern "C" {
KDE_EXPORT KCModule *create_energy(QWidget *parent, char *) {
return new KEnergy(parent, "kcmenergy");
}
KDE_EXPORT void init_energy() {
#ifdef HAVE_DPMS
KConfig *cfg = new KConfig("kcmdisplayrc", true /*readonly*/, false /*no globals*/);
cfg->setGroup("DisplayEnergy");
Display *dpy = qt_xdisplay();
CARD16 pre_configured_status;
BOOL pre_configured_enabled;
CARD16 pre_configured_standby;
CARD16 pre_configured_suspend;
CARD16 pre_configured_off;
bool enabled;
CARD16 standby;
CARD16 suspend;
CARD16 off;
int dummy;
/* query the running X server if DPMS is supported */
if (DPMSQueryExtension(dpy, &dummy, &dummy) && DPMSCapable(dpy)) {
DPMSGetTimeouts(dpy, &pre_configured_standby, &pre_configured_suspend, &pre_configured_off);
DPMSInfo(dpy, &pre_configured_status, &pre_configured_enabled);
/* let the user override the settings */
enabled = cfg->readBoolEntry("displayEnergySaving", pre_configured_enabled);
standby = cfg->readNumEntry("displayStandby", pre_configured_standby/60);
suspend = cfg->readNumEntry("displaySuspend", pre_configured_suspend/60);
off = cfg->readNumEntry("displayPowerOff", pre_configured_off/60);
} else {
/* provide our defauts */
enabled = true;
standby = DFLT_STANDBY;
suspend = DFLT_SUSPEND;
off = DFLT_OFF;
}
delete cfg;
KEnergy::applySettings(enabled, standby, suspend, off);
#endif
}
}
/**** KEnergy ****/
KEnergy::KEnergy(QWidget *parent, const char *name)
: KCModule(parent, name)
{
m_bChanged = false;
m_bEnabled = false;
m_Standby = DFLT_STANDBY;
m_Suspend = DFLT_SUSPEND;
m_Off = DFLT_OFF;
m_bDPMS = false;
m_bMaintainSanity = true;
setQuickHelp( i18n("<h1>Display Power Control</h1> If your display supports"
" power saving features, you can configure them using this module.<p>"
" There are three levels of power saving: standby, suspend, and off."
" The greater the level of power saving, the longer it takes for the"
" display to return to an active state.<p>"
" To wake up the display from a power saving mode, you can make a small"
" movement with the mouse, or press a key that is not likely to cause"
" any unintentional side-effects, for example, the \"Shift\" key."));
#ifdef HAVE_DPMS
int dummy;
m_bDPMS = DPMSQueryExtension(qt_xdisplay(), &dummy, &dummy);
#endif
QVBoxLayout *top = new QVBoxLayout(this, 0, KDialog::spacingHint());
QHBoxLayout *hbox = new QHBoxLayout();
top->addLayout(hbox);
QLabel *lbl;
if (m_bDPMS) {
m_pCBEnable= new QCheckBox(i18n("&Enable display power management" ), this);
connect(m_pCBEnable, SIGNAL(toggled(bool)), SLOT(slotChangeEnable(bool)));
hbox->addWidget(m_pCBEnable);
QWhatsThis::add( m_pCBEnable, i18n("Check this option to enable the"
" power saving features of your display.") );
} else {
lbl = new QLabel(i18n("Your display does not support power saving."), this);
hbox->addWidget(lbl);
}
KURLLabel *logo = new KURLLabel(this);
logo->setURL("http://www.energystar.gov");
logo->setPixmap(QPixmap(locate("data", "kcontrol/pics/energybig.png")));
logo->setTipText(i18n("Learn more about the Energy Star program"));
logo->setUseTips(true);
connect(logo, SIGNAL(leftClickedURL(const QString&)), SLOT(openURL(const QString &)));
hbox->addStretch();
hbox->addWidget(logo);
// Sliders
m_pStandbySlider = new KIntNumInput(m_Standby, this);
m_pStandbySlider->setLabel(i18n("&Standby after:"));
m_pStandbySlider->setRange(0, 120, 10);
m_pStandbySlider->setSuffix(i18n(" min"));
m_pStandbySlider->setSpecialValueText(i18n("Disabled"));
connect(m_pStandbySlider, SIGNAL(valueChanged(int)), SLOT(slotChangeStandby(int)));
top->addWidget(m_pStandbySlider);
QWhatsThis::add( m_pStandbySlider, i18n("Choose the period of inactivity"
" after which the display should enter \"standby\" mode. This is the"
" first level of power saving.") );
m_pSuspendSlider = new KIntNumInput(m_pStandbySlider, m_Suspend, this);
m_pSuspendSlider->setLabel(i18n("S&uspend after:"));
m_pSuspendSlider->setRange(0, 120, 10);
m_pSuspendSlider->setSuffix(i18n(" min"));
m_pSuspendSlider->setSpecialValueText(i18n("Disabled"));
connect(m_pSuspendSlider, SIGNAL(valueChanged(int)), SLOT(slotChangeSuspend(int)));
top->addWidget(m_pSuspendSlider);
QWhatsThis::add( m_pSuspendSlider, i18n("Choose the period of inactivity"
" after which the display should enter \"suspend\" mode. This is the"
" second level of power saving, but may not be different from the first"
" level for some displays.") );
m_pOffSlider = new KIntNumInput(m_pSuspendSlider, m_Off, this);
m_pOffSlider->setLabel(i18n("&Power off after:"));
m_pOffSlider->setRange(0, 120, 10);
m_pOffSlider->setSuffix(i18n(" min"));
m_pOffSlider->setSpecialValueText(i18n("Disabled"));
connect(m_pOffSlider, SIGNAL(valueChanged(int)), SLOT(slotChangeOff(int)));
top->addWidget(m_pOffSlider);
QWhatsThis::add( m_pOffSlider, i18n("Choose the period of inactivity"
" after which the display should be powered off. This is the"
" greatest level of power saving that can be achieved while the"
" display is still physically turned on.") );
top->addStretch();
if (m_bDPMS)
setButtons( KCModule::Help | KCModule::Default | KCModule::Apply );
else
setButtons( KCModule::Help );
m_pConfig = new KConfig("kcmdisplayrc", false /*readwrite*/, false /*no globals*/);
m_pConfig->setGroup("DisplayEnergy");
load();
}
KEnergy::~KEnergy()
{
delete m_pConfig;
}
void KEnergy::load()
{
load( false );
}
void KEnergy::load( bool useDefaults )
{
m_pConfig->setReadDefaults( useDefaults );
readSettings();
showSettings();
emit changed( useDefaults );
}
void KEnergy::save()
{
writeSettings();
applySettings(m_bEnabled, m_Standby, m_Suspend, m_Off);
emit changed(false);
}
void KEnergy::defaults()
{
load( true );
}
void KEnergy::readSettings()
{
m_bEnabled = m_pConfig->readBoolEntry("displayEnergySaving", false);
m_Standby = m_pConfig->readNumEntry("displayStandby", DFLT_STANDBY);
m_Suspend = m_pConfig->readNumEntry("displaySuspend", DFLT_SUSPEND);
m_Off = m_pConfig->readNumEntry("displayPowerOff", DFLT_OFF);
m_StandbyDesired = m_Standby;
m_SuspendDesired = m_Suspend;
m_OffDesired = m_Off;
m_bChanged = false;
}
void KEnergy::writeSettings()
{
if (!m_bChanged)
return;
m_pConfig->writeEntry( "displayEnergySaving", m_bEnabled);
m_pConfig->writeEntry("displayStandby", m_Standby);
m_pConfig->writeEntry("displaySuspend", m_Suspend);
m_pConfig->writeEntry("displayPowerOff", m_Off);
m_pConfig->sync();
m_bChanged = false;
}
void KEnergy::showSettings()
{
m_bMaintainSanity = false;
if (m_bDPMS)
m_pCBEnable->setChecked(m_bEnabled);
m_pStandbySlider->setEnabled(m_bEnabled);
m_pStandbySlider->setValue(m_Standby);
m_pSuspendSlider->setEnabled(m_bEnabled);
m_pSuspendSlider->setValue(m_Suspend);
m_pOffSlider->setEnabled(m_bEnabled);
m_pOffSlider->setValue(m_Off);
m_bMaintainSanity = true;
}
extern "C" {
int dropError(Display *, XErrorEvent *);
typedef int (*XErrFunc) (Display *, XErrorEvent *);
}
int dropError(Display *, XErrorEvent *)
{
return 0;
}
/* static */
void KEnergy::applySettings(bool enable, int standby, int suspend, int off)
{
#ifdef HAVE_DPMS
XErrFunc defaultHandler;
defaultHandler = XSetErrorHandler(dropError);
Display *dpy = qt_xdisplay();
int dummy;
bool hasDPMS = DPMSQueryExtension(dpy, &dummy, &dummy);
if (hasDPMS) {
if (enable) {
DPMSEnable(dpy);
DPMSSetTimeouts(dpy, 60*standby, 60*suspend, 60*off);
} else
DPMSDisable(dpy);
} else
qWarning("Server has no DPMS extension");
XFlush(dpy);
XSetErrorHandler(defaultHandler);
#else
/* keep gcc silent */
if (enable | standby | suspend | off)
/* nothing */ ;
#endif
}
void KEnergy::slotChangeEnable(bool ena)
{
m_bEnabled = ena;
m_bChanged = true;
m_pStandbySlider->setEnabled(ena);
m_pSuspendSlider->setEnabled(ena);
m_pOffSlider->setEnabled(ena);
emit changed(true);
}
void KEnergy::slotChangeStandby(int value)
{
m_Standby = value;
if ( m_bMaintainSanity ) {
m_bMaintainSanity = false;
m_StandbyDesired = value;
if ((m_Suspend > 0 && m_Standby > m_Suspend) ||
(m_SuspendDesired && m_Standby >= m_SuspendDesired) )
m_pSuspendSlider->setValue(m_Standby);
if ((m_Off > 0 && m_Standby > m_Off) ||
(m_OffDesired && m_Standby >= m_OffDesired) )
m_pOffSlider->setValue(m_Standby);
m_bMaintainSanity = true;
}
m_bChanged = true;
emit changed(true);
}
void KEnergy::slotChangeSuspend(int value)
{
m_Suspend = value;
if ( m_bMaintainSanity ) {
m_bMaintainSanity = false;
m_SuspendDesired = value;
if (m_Suspend == 0 && m_StandbyDesired > 0)
m_pStandbySlider->setValue( m_StandbyDesired );
else if (m_Suspend < m_Standby || m_Suspend <= m_StandbyDesired )
m_pStandbySlider->setValue(m_Suspend);
if ((m_Off > 0 && m_Suspend > m_Off) ||
(m_OffDesired && m_Suspend >= m_OffDesired) )
m_pOffSlider->setValue(m_Suspend);
m_bMaintainSanity = true;
}
m_bChanged = true;
emit changed(true);
}
void KEnergy::slotChangeOff(int value)
{
m_Off = value;
if ( m_bMaintainSanity ) {
m_bMaintainSanity = false;
m_OffDesired = value;
if (m_Off == 0 && m_StandbyDesired > 0)
m_pStandbySlider->setValue( m_StandbyDesired );
else if (m_Off < m_Standby || m_Off <= m_StandbyDesired )
m_pStandbySlider->setValue(m_Off);
if (m_Off == 0 && m_SuspendDesired > 0)
m_pSuspendSlider->setValue( m_SuspendDesired );
else if (m_Off < m_Suspend || m_Off <= m_SuspendDesired )
m_pSuspendSlider->setValue(m_Off);
m_bMaintainSanity = true;
}
m_bChanged = true;
emit changed(true);
}
void KEnergy::openURL(const QString &URL)
{
new KRun(KURL( URL ));
}
#include "energy.moc"