Qt Sensors - QML Example

The QtSensors - QML example demonstrates the QML sensors types in the QtSensors import.

Article lu fois.

L'auteur

The Qt Company Ltd.

L'article

Publié le 26 janvier 2024 - Mis à jour le 26 janvier 2024

Liens sociaux

Qt Sensors - QML Example▲

Qt Sensors in QML▲

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

Import the QtSensors declarative plugin:

Sélectionnez

import QtSensors

Add the Sensor QML types into your qml file.

In this example we use the TiltSensor:

Sélectionnez

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.

Sélectionnez

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

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

TiltSensor

Sélectionnez

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

AmbientLightSensor

Sélectionnez

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

Sélectionnez

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

Example project▲

Example project @ code.qt.io

Vous avez aimé ce tutoriel ? Alors partagez-le en cliquant sur les boutons suivants :