qt-creator/doc/examples/accelbubble/main.qml

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import QtQuick 2.9
import QtQuick.Controls 2.2
import QtSensors 5.9

ApplicationWindow {
    visible: true
    width: 640
    height: 480
    title: qsTr("Accelerate Bubble")

    SwipeView {
        id: swipeView
        anchors.fill: parent
        currentIndex: tabBar.currentIndex

        Page1Form {
            bubble {
                id: bubble
                centerX: mainWindow.width / 2
                centerY: mainWindow.height / 2
                bubbleCenter: bubble.width / 2
                x: bubble.centerX - bubble.bubbleCenter
                y: bubble.centerY - bubble.bubbleCenter

                Behavior on y {
                    SmoothedAnimation {
                        easing.type: Easing.Linear
                        duration: 100
                    }
                }
                Behavior on x {
                    SmoothedAnimation {
                        easing.type: Easing.Linear
                        duration: 100
                    }
                }
            }
        }

        Page2Form {
        }
    }

    footer: TabBar {
        id: tabBar
        currentIndex: swipeView.currentIndex

        TabButton {
            text: qsTr("Page 1")
        }
        TabButton {
            text: qsTr("Page 2")
        }
    }

    Accelerometer {
       id: accel
       dataRate: 100
       active: true

       onReadingChanged: {
           var newX = (bubble.x + calcRoll(accel.reading.x, accel.reading.y, accel.reading.z) * 0.1)
           var newY = (bubble.y - calcPitch(accel.reading.x, accel.reading.y, accel.reading.z) * 0.1)

           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
       }
   }

    function calcPitch(x, y, z) {
        return -(Math.atan(y / Math.sqrt(x * x + z * z)) * 57.2957795);
    }
    function calcRoll(x, y, z) {
        return -(Math.atan(x / Math.sqrt(y * y + z * z)) * 57.2957795);
    }
}