Overview
To write a QML application that will use the QML Accelerometer element from the QtMobility.sensors import you need to to the following steps:
Import the QtMobility.sensors declarative plugin:
import QtMobility.sensors 1.3
Add the Accelerometer QML elements into your qml file.
Accelerometer {
id: accel
active: true
dataRate: 20
In additional two properties are added to save the calculated pitch and roll values:
property double pitch: 0.0
property double roll: 0.0
Reading out the Accelerometer data can be done by implementing the 'onReadingChanged' slot and accessing the 'reading' property from the Accelerometer element:
onReadingChanged: {
pitch = -(Math.atan2(reading.x, Math.sqrt(reading.y * reading.y + reading.z * reading.z)) * 180) / Math.PI;
roll = (Math.atan2(reading.y, Math.sqrt(reading.x * reading.x + reading.z * reading.z)) * 180) / Math.PI;
}
}
By using a timer the view can be rotated using the pitch and roll properties from the Accelerometer element:
Timer {
interval: 50; running: true; repeat: true
onTriggered: {
view.rotateY(accel.pitch);
view.rotateX(accel.roll);
}
}
Files:
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