Unity 8
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DBusGreeter.cpp
1 /*
2  * Copyright (C) 2014 Canonical, Ltd.
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; version 3.
7  *
8  * This program is distributed in the hope that it will be useful,
9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11  * GNU General Public License for more details.
12  *
13  * You should have received a copy of the GNU General Public License
14  * along with this program. If not, see <http://www.gnu.org/licenses/>.
15  */
16 
17 #include "DBusGreeter.h"
18 #include "Greeter.h"
19 
20 #include <QDBusMessage>
21 #include <QStringList>
22 
23 DBusGreeter::DBusGreeter(Greeter *greeter, const QDBusConnection &connection, const QString &path)
24  : QObject(greeter),
25  m_greeter(greeter),
26  m_connection(connection),
27  m_path(path)
28 {
29  connect(m_greeter, SIGNAL(isActiveChanged()), this, SLOT(isActiveChangedHandler()));
30 }
31 
32 bool DBusGreeter::isActive() const
33 {
34  return m_greeter->isActive();
35 }
36 
37 void DBusGreeter::ShowGreeter()
38 {
39  return Q_EMIT m_greeter->showGreeter();
40 }
41 
42 void DBusGreeter::isActiveChangedHandler()
43 {
44  notifyPropertyChanged("IsActive", isActive());
45  Q_EMIT isActiveChanged();
46 }
47 
48 // Manually emit a PropertiesChanged signal over DBus, because QtDBus
49 // doesn't do it for us on Q_PROPERTIES, oddly enough.
50 void DBusGreeter::notifyPropertyChanged(const QString& propertyName, const QVariant &value)
51 {
52  QDBusMessage message;
53  QVariantMap changedProps;
54 
55  changedProps.insert(propertyName, value);
56 
57  message = QDBusMessage::createSignal(m_path,
58  "org.freedesktop.DBus.Properties",
59  "PropertiesChanged");
60  message << "com.canonical.UnityGreeter";
61  message << changedProps;
62  message << QStringList();
63 
64  m_connection.send(message);
65 }