Creating a Qt Widget Based Application ◦ Managing Projects

Creating a Mobile Application

 import QtQuick
 import QtSensors

 Window {
     id: mainWindow
     width: 320
     height: 480
     visible: true
     title: qsTr("Accelerate Bubble")
     readonly property double radians_to_degrees: 180 / Math.PI

     Accelerometer {
         id: accel
         dataRate: 100
         active:true

         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
         }
     }

     function calcPitch(x,y,z) {
         return -Math.atan2(y, Math.hypot(x, z)) * mainWindow.radians_to_degrees;
     }
     function calcRoll(x,y,z) {
         return -Math.atan2(x, Math.hypot(y, z)) * mainWindow.radians_to_degrees;
     }

     Image {
         id: bubble
         source: "Bluebubble.svg"
         smooth: true
         property real centerX: mainWindow.width / 2
         property real centerY: mainWindow.height / 2
         property real bubbleCenter: bubble.width / 2
         x: centerX - bubbleCenter
         y: centerY - bubbleCenter

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