Qt Sensors - QML example

Qt Sensors in QML

To write a QML application that will use the QML sensors types in the QtSensors 5 import you need to to the following steps:

Import the QtSensors 5.x declarative plugin:


  import QtSensors 5.0

Add the Sensor QML types into your qml file.

In this example we use the TiltSensor :


  TiltSensor {
      id: tilt
      active: false
  }

The Tilt-, AmbientLight- and the Proximity QML sensor types have the 'enabled' property in common. To start or stop the sensor set this property to true or false.


  tilt.active = (tiltStart.text === "Start");

Reading the data can be done for each sensor type like following:

TiltSensor


  text: "X Rotation: " + (tilt.reading ? tilt.reading.xRotation.toFixed(2) + "°" : "Unknown")
  text: "Y Rotation: " + (tilt.reading ? tilt.reading.yRotation.toFixed(2) + "°" : "Unknown")

AmbientLightSensor


  onReadingChanged: {
      if (reading.lightLevel == AmbientLightReading.Dark)
          ambientlighttext.text = "Ambient light: Dark";
      else if (reading.lightLevel == AmbientLightReading.Twilight)
          ambientlighttext.text = "Ambient light: Twilight";
      else if (reading.lightLevel == AmbientLightReading.Light)
          ambientlighttext.text = "Ambient light: Light";
      else if (reading.lightLevel == AmbientLightReading.Bright)
          ambientlighttext.text = "Ambient light: Bright";
      else if (reading.lightLevel == AmbientLightReading.Sunny)
          ambientlighttext.text = "Ambient light: Sunny";
      else
          ambientlighttext.text = "Ambient light: Unknown";
  }

ProximitySensor


  text: "Proximity: " +
        (proxi.active ? (proxi.reading.near ? "Near" : "Far") : "Unknown")

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