workspace/powerdevil/daemon/WidgetBasedPoller.cpp

   1 /***************************************************************************
   2  *   Copyright (C) 2008 by Dario Freddi <drf@kdemod.ath.cx>                *
   3  *                                                                         *
   4  *   This program is free software; you can redistribute it and/or modify  *
   5  *   it under the terms of the GNU General Public License as published by  *
   6  *   the Free Software Foundation; either version 2 of the License, or     *
   7  *   (at your option) any later version.                                   *
   8  *                                                                         *
   9  *   This program is distributed in the hope that it will be useful,       *
  10  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  11  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  12  *   GNU General Public License for more details.                          *
  13  *                                                                         *
  14  *   You should have received a copy of the GNU General Public License     *
  15  *   along with this program; if not, write to the                         *
  16  *   Free Software Foundation, Inc.,                                       *
  17  *   51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA .        *
  18  **************************************************************************/
  19
  20 #include "WidgetBasedPoller.h"
  21
  22 #include <QWidget>
  23 #include <QTimer>
  24 #include <QX11Info>
  25 #include <QEvent>
  26
  27 #include <klocalizedstring.h>
  28
  29 WidgetBasedPoller::WidgetBasedPoller(QObject *parent)
  30         : AbstractSystemPoller(parent)
  31 {
  32 }
  33
  34 WidgetBasedPoller::~WidgetBasedPoller()
  35 {
  36 }
  37
  38 QString WidgetBasedPoller::name()
  39 {
  40     return i18n("Grabber Widget Based");
  41 }
  42
  43 bool WidgetBasedPoller::isAvailable()
  44 {
  45 #ifdef HAVE_XSCREENSAVER
  46     return true;
  47 #else
  48     return false;
  49 #endif
  50 }
  51
  52 bool WidgetBasedPoller::setUpPoller()
  53 {
  54     m_pollTimer = new QTimer(this);
  55
  56     //setup idle timer, with some smart polling
  57     connect(m_pollTimer, SIGNAL(timeout()), this, SLOT(poll()));
  58
  59     // This code was taken from Lithium/KDE4Powersave
  60     m_grabber = new QWidget(0, Qt::X11BypassWindowManagerHint);
  61     m_grabber->move(-1000, -1000);
  62     m_grabber->setMouseTracking(true);
  63     m_grabber->installEventFilter(this);
  64     m_grabber->setObjectName("PowerDevilGrabberWidget");
  65
  66     m_screenSaverIface = new OrgFreedesktopScreenSaverInterface("org.freedesktop.ScreenSaver", "/ScreenSaver",
  67             QDBusConnection::sessionBus(), this);
  68
  69     connect(m_screenSaverIface, SIGNAL(ActiveChanged(bool)), SLOT(screensaverActivated(bool)));
  70
  71     return true;
  72 }
  73
  74 void WidgetBasedPoller::unloadPoller()
  75 {
  76     m_pollTimer->deleteLater();
  77     m_grabber->deleteLater();
  78 }
  79
  80 void WidgetBasedPoller::setNextTimeout(int nextTimeout)
  81 {
  82     m_pollTimer->start(nextTimeout);
  83 }
  84
  85 void WidgetBasedPoller::screensaverActivated(bool activated)
  86 {
  87     // We care only if it has been disactivated
  88
  89     if (!activated) {
  90         m_screenSaverIface->SimulateUserActivity();
  91         emit resumingFromIdle();
  92     }
  93 }
  94
  95 bool WidgetBasedPoller::eventFilter(QObject * object, QEvent * event)
  96 {
  97     if (object == m_grabber
  98             && (event->type() == QEvent::MouseMove || event->type() == QEvent::KeyPress)) {
  99         detectedActivity();
 100         return true;
 101     } else if (object != m_grabber) {
 102         // If it's not the grabber, fallback to default event filter
 103         return false;
 104     }
 105
 106     // Otherwise, simply ignore it
 107     return false;
 108
 109 }
 110
 111 void WidgetBasedPoller::waitForActivity()
 112 {
 113     // This code was taken from Lithium/KDE4Powersave
 114
 115     m_grabber->show();
 116     m_grabber->grabMouse();
 117     m_grabber->grabKeyboard();
 118
 119 }
 120
 121 void WidgetBasedPoller::detectedActivity()
 122 {
 123     emit resumingFromIdle();
 124 }
 125
 126 void WidgetBasedPoller::releaseInputLock()
 127 {
 128     m_grabber->releaseMouse();
 129     m_grabber->releaseKeyboard();
 130     m_grabber->hide();
 131 }
 132
 133 #ifdef HAVE_XSCREENSAVER
 134 #include <X11/extensions/scrnsaver.h>
 135 #endif
 136
 137 void WidgetBasedPoller::poll()
 138 {
 139     /* Hack! Since KRunner still doesn't behave properly, the
 140      * correct way to go doesn't work (yet), and it's this one:
 141         ------------------------------------------------------------
 142         int idle = m_screenSaverIface->GetSessionIdleTime();
 143         ------------------------------------------------------------
 144      */
 145     /// In the meanwhile, this X11 hackish way gets its job done.
 146     //----------------------------------------------------------
 147
 148     int idle = 0;
 149
 150 #ifdef HAVE_XSCREENSAVER
 151     XScreenSaverInfo * mitInfo = 0;
 152     mitInfo = XScreenSaverAllocInfo();
 153     XScreenSaverQueryInfo(QX11Info::display(), DefaultRootWindow(QX11Info::display()), mitInfo);
 154     idle = mitInfo->idle / 1000;
 155     //----------------------------------------------------------
 156 #endif
 157
 158     emit pollRequest(idle);
 159 }
 160
 161 void WidgetBasedPoller::forcePollRequest()
 162 {
 163     poll();
 164 }
 165
 166 void WidgetBasedPoller::stopCatchingTimeouts()
 167 {
 168     m_pollTimer->stop();
 169 }
 170
 171 void WidgetBasedPoller::catchIdleEvent()
 172 {
 173     waitForActivity();
 174 }
 175
 176 void WidgetBasedPoller::stopCatchingIdleEvents()
 177 {
 178     releaseInputLock();
 179 }
 180
 181 #include "WidgetBasedPoller.moc"