workspace/libs/kephal/libkephal/libkephal.cpp

   1 /*
   2  *   Copyright 2008 Aike J Sommer <dev@aikesommer.name>
   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
   6  *   published by the Free Software Foundation; either version 2,
   7  *   or (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 Library General Public
  15  *   License 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
  21 #include <QDBusInterface>
  22
  23 #include "screens/dbus/dbusscreens.h"
  24 #include "outputs/dbus/dbusoutputs.h"
  25 #include "configurations/dbus/dbusconfigurations.h"
  26 #include "configurations/noconfigurations.h"
  27 #include "screens/output/outputscreens.h"
  28 #include "outputs/desktopwidget/desktopwidgetoutputs.h"
  29
  30 using namespace Kephal;
  31
  32
  33 /**
  34  * This factory-method is invoked the first time any of Screens::self(),
  35  * Outputs::self() or Configurations::self() is called.
  36  * It will create the singleton-instances and check for their validity.
  37  * If the dbus-based implementations are not valid a fallback to
  38  * QDesktopWidget will be used instead.
  39  *
  40  * The method is hooked into the ...::self()-methods with these lines
  41  * in the cmake-file:
  42  * ADD_DEFINITIONS (-DSCREENS_FACTORY=libkephal_factory)
  43  * ADD_DEFINITIONS (-DOUTPUTS_FACTORY=libkephal_factory)
  44  * ADD_DEFINITIONS (-DCONFIGURATIONS_FACTORY=libkephal_factory)
  45  */
  46 void libkephal_factory() {
  47     //qDebug() << "trying to access kephald...";
  48     QDBusInterface interface("org.kde.kded", "/modules/kded_kephal");
  49
  50     DBusConfigurations * configurations = new DBusConfigurations(qApp);
  51     DBusOutputs * outputs = new DBusOutputs(qApp);
  52     DBusScreens * screens = new DBusScreens(qApp);
  53     if ((! screens->isValid()) || (! outputs->isValid()) || (! configurations->isValid())) {
  54         qWarning() << "could not access kephald, falling back to QDesktopWidget";
  55
  56         delete screens;
  57         delete outputs;
  58         delete configurations;
  59
  60         new NoConfigurations(qApp);
  61         new DesktopWidgetOutputs(qApp);
  62         new OutputScreens(qApp);
  63     }
  64 }
  65