accelbubble.qml Example File

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  import QtQuick 2.1
  import QtQuick.Controls 1.0

  import QtSensors 5.0

  ApplicationWindow {
      title: "Accelerate Bubble"
      id: mainWindow
      width: 320
      height: 480
      visible: true

      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.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);
      }

      Image {
          id: bubble
          source: "content/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
              }
          }
      }
  }