author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Fri, 11 Jun 2010 14:26:25 +0300 | |
changeset 11 | 06b8e2af4411 |
parent 8 | 71781823f776 |
child 14 | 6fbed849b4f4 |
permissions | -rw-r--r-- |
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/**************************************************************************** |
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** |
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** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies). |
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** All rights reserved. |
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** Contact: Nokia Corporation (qt-info@nokia.com) |
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** |
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** This file is part of the Qt Mobility Components. |
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** |
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** $QT_BEGIN_LICENSE:LGPL$ |
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** No Commercial Usage |
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** This file contains pre-release code and may not be distributed. |
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** You may use this file in accordance with the terms and conditions |
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** contained in the Technology Preview License Agreement accompanying |
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** this package. |
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** |
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** GNU Lesser General Public License Usage |
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** Alternatively, this file may be used under the terms of the GNU Lesser |
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** General Public License version 2.1 as published by the Free Software |
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** Foundation and appearing in the file LICENSE.LGPL included in the |
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** packaging of this file. Please review the following information to |
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** ensure the GNU Lesser General Public License version 2.1 requirements |
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** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. |
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** |
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** In addition, as a special exception, Nokia gives you certain additional |
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** rights. These rights are described in the Nokia Qt LGPL Exception |
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. |
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** |
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** If you have questions regarding the use of this file, please contact |
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** Nokia at qt-info@nokia.com. |
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** |
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** |
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** |
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** |
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** |
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** |
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** |
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** |
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** $QT_END_LICENSE$ |
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** |
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****************************************************************************/ |
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#include "qsensormanager.h" |
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#include <QDebug> |
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#include "qsensorpluginloader_p.h" |
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#include "qsensorplugin.h" |
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#include <QSettings> |
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#include "sensorlog_p.h" |
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QTM_BEGIN_NAMESPACE |
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Q_GLOBAL_STATIC_WITH_ARGS(QSensorPluginLoader, pluginLoader, (QSensorPluginInterface_iid, QLatin1String("/sensors"))) |
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typedef QHash<QByteArray,QSensorBackendFactory*> FactoryForIdentifierMap; |
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typedef QHash<QByteArray,FactoryForIdentifierMap> BackendIdentifiersForTypeMap; |
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class QSensorManagerPrivate |
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{ |
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public: |
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QSensorManagerPrivate() |
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: pluginsLoaded(false) |
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{ |
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} |
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bool pluginsLoaded; |
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QList<CreatePluginFunc> staticRegistrations; |
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// Holds a mapping from type to available identifiers (and from there to the factory) |
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BackendIdentifiersForTypeMap backendsByType; |
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// Holds the first identifier for each type |
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QHash<QByteArray, QByteArray> firstIdentifierForType; |
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}; |
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Q_GLOBAL_STATIC(QSensorManagerPrivate, sensorManagerPrivate) |
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static void loadPlugins() |
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{ |
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QSensorManagerPrivate *d = sensorManagerPrivate(); |
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d->pluginsLoaded = true; |
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SENSORLOG() << "initializing static plugins"; |
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Q_FOREACH (CreatePluginFunc func, d->staticRegistrations) { |
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QSensorPluginInterface *plugin = func(); |
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plugin->registerSensors(); |
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} |
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SENSORLOG() << "initializing plugins"; |
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Q_FOREACH (QSensorPluginInterface *plugin, pluginLoader()->plugins()) { |
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plugin->registerSensors(); |
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} |
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} |
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// ===================================================================== |
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/*! |
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\class QSensorManager |
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\ingroup sensors_backend |
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\brief The QSensorManager class handles registration and creation of sensor backends. |
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|
101 |
|
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102 |
Sensor plugins register backends using the registerBackend() function. |
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|
103 |
|
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|
104 |
When QSensor::connectToBackend() is called, the createBackend() function will be called. |
1
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105 |
*/ |
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|
106 |
|
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107 |
/*! |
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108 |
Register a sensor for \a type. The \a identifier must be unique. |
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109 |
|
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|
110 |
The \a factory will be asked to create instances of the backend. |
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111 |
*/ |
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|
112 |
void QSensorManager::registerBackend(const QByteArray &type, const QByteArray &identifier, QSensorBackendFactory *factory) |
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113 |
{ |
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|
114 |
QSensorManagerPrivate *d = sensorManagerPrivate(); |
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|
115 |
if (!d->backendsByType.contains(type)) { |
2b40d63a9c3d
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|
116 |
(void)d->backendsByType[type]; |
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117 |
d->firstIdentifierForType[type] = identifier; |
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118 |
} |
4
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119 |
SENSORLOG() << "registering backend for type" << type << "identifier" << identifier;// << "factory" << QString().sprintf("0x%08x", (unsigned int)factory); |
1
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|
120 |
FactoryForIdentifierMap &factoryByIdentifier = d->backendsByType[type]; |
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121 |
factoryByIdentifier[identifier] = factory; |
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122 |
} |
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123 |
|
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124 |
/*! |
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125 |
\internal |
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126 |
*/ |
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Revision: 201011
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127 |
void QSensorManager::registerStaticPlugin(CreatePluginFunc func) |
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128 |
{ |
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129 |
QSensorManagerPrivate *d = sensorManagerPrivate(); |
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Revision: 201011
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|
130 |
d->staticRegistrations.append(func); |
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Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
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|
131 |
} |
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Revision: 201011
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|
132 |
|
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Revision: 201011
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133 |
/*! |
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Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
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|
134 |
Create a backend for \a sensor. Returns null if no suitable backend exists. |
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Revision: 201011
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|
135 |
*/ |
2b40d63a9c3d
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
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|
136 |
QSensorBackend *QSensorManager::createBackend(QSensor *sensor) |
2b40d63a9c3d
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
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|
137 |
{ |
2b40d63a9c3d
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
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|
138 |
Q_ASSERT(sensor); |
2b40d63a9c3d
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
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diff
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|
139 |
|
2b40d63a9c3d
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
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diff
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|
140 |
QSensorManagerPrivate *d = sensorManagerPrivate(); |
2b40d63a9c3d
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
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|
141 |
if (!d->pluginsLoaded) |
2b40d63a9c3d
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
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diff
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|
142 |
loadPlugins(); |
2b40d63a9c3d
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
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|
143 |
|
4
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Revision: 201015
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
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1
diff
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|
144 |
SENSORLOG() << "QSensorManager::createBackend" << "type" << sensor->type() << "identifier" << sensor->identifier(); |
1
2b40d63a9c3d
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
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diff
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|
145 |
|
2b40d63a9c3d
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
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diff
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|
146 |
if (!d->backendsByType.contains(sensor->type())) { |
4
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Revision: 201015
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
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|
147 |
SENSORLOG() << "no backends of type" << sensor->type() << "have been registered."; |
1
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Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
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|
148 |
return 0; |
2b40d63a9c3d
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
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|
149 |
} |
2b40d63a9c3d
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
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|
150 |
|
2b40d63a9c3d
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
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diff
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|
151 |
const FactoryForIdentifierMap &factoryByIdentifier = d->backendsByType[sensor->type()]; |
2b40d63a9c3d
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
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|
152 |
QSensorBackendFactory *factory; |
2b40d63a9c3d
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
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|
153 |
QSensorBackend *backend; |
2b40d63a9c3d
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
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|
154 |
|
2b40d63a9c3d
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
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|
155 |
if (sensor->identifier().isEmpty()) { |
2b40d63a9c3d
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
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|
156 |
QByteArray defaultIdentifier = QSensor::defaultSensorForType(sensor->type()); |
4
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Revision: 201015
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
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1
diff
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|
157 |
SENSORLOG() << "Trying the default" << defaultIdentifier; |
1
2b40d63a9c3d
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
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|
158 |
// No identifier set, try the default |
2b40d63a9c3d
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
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|
159 |
factory = factoryByIdentifier[defaultIdentifier]; |
4
90517678cc4f
Revision: 201015
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
1
diff
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|
160 |
//SENSORLOG() << "factory" << QString().sprintf("0x%08x", (unsigned int)factory); |
1
2b40d63a9c3d
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
161 |
sensor->setIdentifier(defaultIdentifier); // the factory requires this |
2b40d63a9c3d
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
162 |
backend = factory->createBackend(sensor); |
4
90517678cc4f
Revision: 201015
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
1
diff
changeset
|
163 |
if (backend) goto gotbackend; // Got it! |
1
2b40d63a9c3d
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
164 |
|
2b40d63a9c3d
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
165 |
// The default failed to instantiate so try any other registered sensors for this type |
2b40d63a9c3d
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
166 |
Q_FOREACH (const QByteArray &identifier, factoryByIdentifier.keys()) { |
4
90517678cc4f
Revision: 201015
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
1
diff
changeset
|
167 |
SENSORLOG() << "Trying" << identifier; |
1
2b40d63a9c3d
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
168 |
if (identifier == defaultIdentifier) continue; // Don't do the default one again |
2b40d63a9c3d
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
169 |
factory = factoryByIdentifier[identifier]; |
4
90517678cc4f
Revision: 201015
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
1
diff
changeset
|
170 |
//SENSORLOG() << "factory" << QString().sprintf("0x%08x", (unsigned int)factory); |
1
2b40d63a9c3d
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
171 |
sensor->setIdentifier(identifier); // the factory requires this |
2b40d63a9c3d
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
172 |
backend = factory->createBackend(sensor); |
4
90517678cc4f
Revision: 201015
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
1
diff
changeset
|
173 |
if (backend) goto gotbackend; // Got it! |
1
2b40d63a9c3d
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
174 |
} |
4
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Revision: 201015
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
1
diff
changeset
|
175 |
SENSORLOG() << "FAILED"; |
1
2b40d63a9c3d
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
176 |
sensor->setIdentifier(QByteArray()); // clear the identifier |
2b40d63a9c3d
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
177 |
} else { |
2b40d63a9c3d
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
178 |
if (!factoryByIdentifier.contains(sensor->identifier())) { |
4
90517678cc4f
Revision: 201015
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
1
diff
changeset
|
179 |
SENSORLOG() << "no backend with identifier" << sensor->identifier() << "for type" << sensor->type(); |
1
2b40d63a9c3d
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
180 |
return 0; |
2b40d63a9c3d
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
181 |
} |
2b40d63a9c3d
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
182 |
|
2b40d63a9c3d
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
183 |
// We were given an explicit identifier so don't substitute other backends if it fails to instantiate |
2b40d63a9c3d
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
184 |
factory = factoryByIdentifier[sensor->identifier()]; |
4
90517678cc4f
Revision: 201015
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
1
diff
changeset
|
185 |
//SENSORLOG() << "factory" << QString().sprintf("0x%08x", (unsigned int)factory); |
1
2b40d63a9c3d
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
186 |
backend = factory->createBackend(sensor); |
4
90517678cc4f
Revision: 201015
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
1
diff
changeset
|
187 |
if (backend) goto gotbackend; // Got it! |
1
2b40d63a9c3d
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
188 |
} |
2b40d63a9c3d
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
189 |
|
4
90517678cc4f
Revision: 201015
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
1
diff
changeset
|
190 |
SENSORLOG() << "no suitable backend found for requested identifier" << sensor->identifier() << "and type" << sensor->type(); |
1
2b40d63a9c3d
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
191 |
return 0; |
4
90517678cc4f
Revision: 201015
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
1
diff
changeset
|
192 |
|
90517678cc4f
Revision: 201015
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
1
diff
changeset
|
193 |
gotbackend: |
5
453da2cfceef
Revision: 201017
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
4
diff
changeset
|
194 |
if (sensor->availableDataRates().count() != 0 && sensor->dataRate() == 0) { |
4
90517678cc4f
Revision: 201015
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
1
diff
changeset
|
195 |
qWarning() << sensor->identifier() << "backend did not supply default data rate."; |
90517678cc4f
Revision: 201015
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
1
diff
changeset
|
196 |
} |
90517678cc4f
Revision: 201015
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
1
diff
changeset
|
197 |
return backend; |
1
2b40d63a9c3d
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
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} |
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// ===================================================================== |
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/*! |
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Returns a list of all sensor types. |
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*/ |
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QList<QByteArray> QSensor::sensorTypes() |
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{ |
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QSensorManagerPrivate *d = sensorManagerPrivate(); |
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if (!d->pluginsLoaded) |
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loadPlugins(); |
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return d->backendsByType.keys(); |
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} |
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/*! |
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Returns a list of ids for each of the sensors for \a type. |
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If there are no sensors of that type available the list will be empty. |
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*/ |
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QList<QByteArray> QSensor::sensorsForType(const QByteArray &type) |
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{ |
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QSensorManagerPrivate *d = sensorManagerPrivate(); |
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if (!d->pluginsLoaded) |
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loadPlugins(); |
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4
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// no sensors of that type exist |
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if (!d->backendsByType.contains(type)) |
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return QList<QByteArray>(); |
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1
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return d->backendsByType[type].keys(); |
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} |
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/*! |
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Returns the default sensor identifier for \a type. |
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This is set in a config file and can be overridden if required. |
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If no default is available the system will return the first registered |
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sensor for \a type. |
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*/ |
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QByteArray QSensor::defaultSensorForType(const QByteArray &type) |
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{ |
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QSensorManagerPrivate *d = sensorManagerPrivate(); |
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if (!d->pluginsLoaded) |
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loadPlugins(); |
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// no sensors of that type exist |
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if (!d->backendsByType.contains(type)) |
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return QByteArray(); |
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QSettings settings(QLatin1String("Nokia"), QLatin1String("Sensors")); |
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QVariant value = settings.value(QString(QLatin1String("Default/%1")).arg(QString::fromLatin1(type))); |
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if (!value.isNull()) { |
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QByteArray defaultIdentifier = value.toByteArray(); |
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if (d->backendsByType[type].contains(defaultIdentifier)) // Don't return a value that we can't use! |
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return defaultIdentifier; |
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} |
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// This is our fallback |
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return d->firstIdentifierForType[type]; |
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} |
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// ===================================================================== |
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/*! |
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\class QSensorBackendFactory |
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\ingroup sensors_backend |
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\brief The QSensorBackendFactory class instantiates instances of |
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QSensorBackend. |
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This interface must be implemented in order to register a sensor backend. |
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\sa {Creating a sensor plugin} |
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*/ |
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/*! |
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\fn QSensorBackendFactory::~QSensorBackendFactory() |
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\internal |
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*/ |
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/*! |
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\fn QSensorBackendFactory::createBackend(QSensor *sensor) |
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Instantiate a backend. If the factory handles multiple identifiers |
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it should check with the \a sensor to see which one is requested. |
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If the factory cannot create a backend it should return 0. |
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*/ |
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/*! |
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\macro REGISTER_STATIC_PLUGIN(pluginname) |
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\relates QSensorManager |
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Registers a static plugin, \a pluginname. |
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|
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Note that this macro relies on static initialization so it may not be appropriate |
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for use in a library and may not work on all platforms. |
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\sa {Creating a sensor plugin} |
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*/ |
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QTM_END_NAMESPACE |
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