- Qt 5.15
- Qt Sensors
- Qt Sensors Examples
- Qt Sensors - Accel Bubble
- Qt 5.15.17 Reference Documentation

# Qt Sensors - Accel Bubble

The AccelBubble example demonstrates the Accelerometer QML type.

#### Overview

Writing a QML application that uses the Accelerometer QML sensors type requires the following steps:

Import the Sensors Declarative module.

     import QtSensors 5.0

Add an Accelerometer QML type.

         Accelerometer {
             id: accel
             dataRate: 100

Use the 'active' property to start the sensor

             active:true

Move the bubble according to a factor of the accelerator sensor

             onReadingChanged: {
                 var newX = (bubble.x + calcRoll(accel.reading.x, accel.reading.y, accel.reading.z) * .1)
                 var newY = (bubble.y - calcPitch(accel.reading.x, accel.reading.y, accel.reading.z) * .1)

                 if (isNaN(newX) || isNaN(newY))
                     return;

                 if (newX < 0)
                     newX = 0

                 if (newX > mainWindow.width - bubble.width)
                     newX = mainWindow.width - bubble.width

                 if (newY < 18)
                     newY = 18

                 if (newY > mainWindow.height - bubble.height)
                     newY = mainWindow.height - bubble.height

                     bubble.x = newX
                     bubble.y = newY
             }

Example project @ code.qt.io