path: root/examples/sensors/sensorgestures/doc
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authorGeir Vattekar <>2012-10-04 13:48:23 +0200
committerThe Qt Project <>2012-10-12 15:16:15 +0200
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+** Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies).
+** Contact:
+** This file is part of the documentation of the Qt Toolkit.
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and Digia. For licensing terms and
+** conditions see For further information
+** use the contact form at
+** GNU Free Documentation License Usage
+** Alternatively, this file may be used under the terms of the GNU Free
+** Documentation License version 1.3 as published by the Free Software
+** Foundation and appearing in the file included in the packaging of
+** this file. Please review the following information to ensure
+** the GNU Free Documentation License version 1.3 requirements
+** will be met:
+ \example sensorgestures
+ \title Qt Sensors - C++ Sensor Gestures Example
+ \ingroup qtsensors-examples
+ \brief The sensor gesture example demonstrates the steps for creating a C++ application
+ that uses sensor gestures and the included shake sensor.
+ \image sensorgesturecpp.png
+ QSensorGestures class defines one predefined signal, \c { void detected(const QString &) }
+ As well, Sensor Gesture Recognizers may implement any number of their own custom signals.
+ Our shake recognizer defines one custom signal, \c {void shake()}, as well as the predefined
+ detected signal.
+ \section1 SensorGestures Class Implementation
+ In order to know about custom signals that may be available, we need to ask the QSensorGestureManager about them,
+ Using the QSensorGesture::gestureIds() function, the manager will return a QStringList of known and valid gesture Ids.
+ \snippet sensorgestures/mainwindow.cpp 0
+ We can then use this to create a QSensorGesture object that we can use to connect signals to,
+ and start the detection process. A QSensorGesture object will take a list of one or more
+ recognizer ids in it's constructor.
+ \snippet sensorgestures/mainwindow.cpp 1
+ and later stop the detection process.
+ \snippet sensorgestures/mainwindow.cpp 2
+ The QSensorGesture object will contain all the signals of the valid requested recognizers found on the system.
+ You can discover which of the requested recognizer ID's that were not found by using QSensorGesture::invalidIds();
+ By using QSensorGesture::gestureSignals(), you can get a QStringList of usable signals.