- Qt 5.5
- Qt Sensors
- Qt Sensors - SensorGesture QML Type example
- Qt 5.5.1 Reference Documentation

# Qt Sensors - SensorGesture QML Type example

## Overview

To write a QML application that will use the gesture plugin, following steps are needed:

Import the QtSensors 5.x module:

    import QtSensors 5.0

Add the SensorGesture QML type into your qml file.

        SensorGesture {
            id: sensorGesture
            enabled: false
            onDetected: {
                if (gesture !== oldGesture)
                    count = 0;
                valueText.text = gesture + " " + count;
                oldGesture = gesture;
                count++;
            }
            onEnabledChanged: {
                valueText.text = ""
            }
        }

Each SensorGesture QML type contains a property called gestures. This example uses an alias `gestureId` for this property.

        property alias gestureId: sensorGesture.gestures

Then, the gesture or gestures to use can be specified using the alias:

            onSelectedGestureChanged: {
                gesture.enabled = false;
                gesture.gestureId = gestureList.selectedGesture;
                ...
            }

A list of all available gestures is accessible through the `availableGestures` property:

            ListView {
                id: gestureList

                model: gesture.availableGestures
                ...
            }

Files:

- qmlsensorgestures/Button.qml
- qmlsensorgestures/GestureList.qml
- qmlsensorgestures/GestureView.qml
- qmlsensorgestures/GesturesView.qml
- qmlsensorgestures/qmlsensorgestures.qml
- qmlsensorgestures/plugin/qcountergestureplugin.cpp
- qmlsensorgestures/plugin/qcountergestureplugin.h
- qmlsensorgestures/plugin/qcounterrecognizer.cpp
- qmlsensorgestures/plugin/qcounterrecognizer.h
- qmlsensorgestures/main.cpp
- qmlsensorgestures/qml.pro
- qmlsensorgestures/qml.qrc
- qmlsensorgestures/qmlsensorgestures.pro
- qmlsensorgestures/plugin/plugin.pro

See also Qt Sensors - ShakeIt QML Example and Qt Sensor Gestures.