Sensors QML Plugin

Overview

The QML Sensors Plugin provides an easy to use interface to the Sensors API. It enables us to receive sensor events and to read current values from sensors.

The plugin contains many sensor types and access functions to read values from them. As an example consider the orientation sensor. The orientation example simply displays text on-screen to show the current orientation.

The QML code that reads the value is quite simple. Here we see a QML component orientation declared which is an OrientationSensor element. First the sensor is started by setting the active property to true. The element receives a signal when the reading changes and it is picked up by the onReadingChanged slot. Now the reading property of this element can be used to extract the current orientation so that it can be compared against the defined values of various orientations in the OrientationReading element.

 OrientationSensor {
     id: orientation
     active: true

     onReadingChanged: {

         if (reading.orientation == OrientationReading.FaceUp)
             content.state = "FaceUp";

         // ... more tests for different orientations ...
     }
 }

Other sensors can be treated in a similar manner. For example, the Compass sensor could have almost identical coding

 Compass {
     id: compass
     active: true

     onReadingChanged: {
         compassHeading.text = reading.azimuth;

         // ...
     }
 }

QML Elements

QML Accelerometer Element	The Accelerometer element reports on linear acceleration along the X, Y and Z axes.
QML AmbientLightSensor Element	The AmbientLightSensor element repors on ambient lighting conditions.
QML Compass Element	The Compass element reports on heading using magnetic north as a reference.
QML Gyroscope Element	The Gyroscope element reports on rotational acceleration around the X, Y and Z axes.
QML LightSensor Element	The LightSensor element reports on light levels using LUX.
QML Magnetometer Element	The Magnetometer element reports on magnetic field strength along the Z, Y and Z axes.
QML OrientationSensor Element	The OrientationSensor element reports device orientation.
QML ProximitySensor Element	The ProximitySensor element reports on object proximity.
QML RotationSensor Element	The RotationSensor element reports on device rotation around the X, Y and Z axes.
QML Sensor Element	The Sensor element serves as a base type for sensors.
QML TapSensor Element	The TapSensor element reports tap and double tap events along the X, Y and Z axes.

QML AccelerometerReading Element	The AccelerometerReading element holds the most recent Accelerometer reading.
QML AmbientLightReading Element	The AmbientLightReading element holds the most AmbientLightSensor reading.
QML CompassReading Element	The CompassReading element holds the most recent Compass reading.
QML GyroscopeReading Element	The GyroscopeReading element holds the most recent Gyroscope reading.
QML LightReading Element	The LightReading element holds the most recent LightSensor reading.
QML MagnetometerReading Element	The MagnetometerReading element holds the most recent Magnetometer reading.
QML OrientationReading Element	The OrientationReading element holds the most recent OrientationSensor reading.
QML ProximityReading Element	The ProximityReading element holds the most recent ProximitySensor reading.
QML RotationReading Element	The RotationReading element holds the most recent RotationSensor reading.
QML SensorReading Element	The SensorReading element serves as a base type for sensor readings.
QML TapReading Element	The TapReading element holds the most recent TapSensor reading.