main.qml Example File

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);
      }
  }