main.qml Example File

accelbubble/main.qml

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  import QtQuick 2.7
  import QtQuick.Controls 2.0
  import QtQuick.Layouts 1.0
  import QtSensors 5.7

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

      Page1 {
          anchors.fill: parent
          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
                  }
              }
          }
      }

      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);
         }
  }