Qt 5.9 | Qt Sensors | Qt Sensors Examples | Qt Sensors - QML example

Qt 5.9.9 Reference Documentation

# 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")

Files:

- qmlqtsensors/qmlqtsensors.qml
- qmlqtsensors/components/ApplicationWindow.qml
- qmlqtsensors/components/Button.qml
- qmlqtsensors/components/Divider.qml
- qmlqtsensors/main.cpp
- qmlqtsensors/qmlqtsensors.pro
- qmlqtsensors/qmlqtsensors.qrc