AppleTVInput.qml Example File

planets-qml/AppleTVInput.qml
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 import QtQuick 2.7
 import QtQuick.Window 2.2

 Item {
     id: appleTVInput

     property real xThreshold: 500
     property real yThreshold: 300

     signal swipeLeft()
     signal swipeRight()
     signal swipeUp()
     signal swipeDown()

     onSwipeLeft: {
         var focusedItem = Window.window.activeFocusItem
         if (typeof(focusedItem.swipeLeft) === "function") {
             focusedItem.swipeLeft()
         }
     }

     onSwipeRight: {
         var focusedItem = Window.window.activeFocusItem
         if (typeof(focusedItem.swipeRight) === "function") {
             focusedItem.swipeRight()
         }
     }

     onSwipeUp: {
         var focusedItem = Window.window.activeFocusItem
         if (typeof(focusedItem.swipeUp) === "function") {
             focusedItem.swipeUp()
         }
     }

     onSwipeDown: {
         var focusedItem = Window.window.activeFocusItem
         if (typeof(focusedItem.swipeDown) === "function") {
             focusedItem.swipeDown()
         }
     }

     MultiPointTouchArea {
         id: multiPointTouchArea

         anchors.fill: parent

         property int startX: 0
         property int startY: 0

         property int pointX: 0
         property int pointY: 0

         property int xIsIncreasing: -1 // 1 - true, 0 - false, -1 - undefined
         property int yIsIncreasing: -1 // 1 - true, 0 - false, -1 - undefined

         property bool pressed: false

         touchPoints: [
             TouchPoint {

                 onPressedChanged: {
                     if (pressed) {
                         multiPointTouchArea.startX = x
                         multiPointTouchArea.startY = y
                         multiPointTouchArea.pressed = true
                     } else {
                         multiPointTouchArea.pressed = false
                         multiPointTouchArea.xIsIncreasing = -1
                         multiPointTouchArea.yIsIncreasing = -1
                         multiPointTouchArea.startX = 0
                         multiPointTouchArea.startY = 0
                     }
                 }

                 onXChanged: {
                     if (multiPointTouchArea.pressed) {
                         var newValue = x - multiPointTouchArea.startX

                         var focusedItem = appleTVInput.Window.window.activeFocusItem

                         if (focusedItem.panningEnabled) {
                             if (multiPointTouchArea.xIsIncreasing === -1) {
                                 multiPointTouchArea.xIsIncreasing = (newValue > multiPointTouchArea.startX) ? 1 : 0
                             } else {
                                 if (multiPointTouchArea.xIsIncreasing === 1 && newValue < multiPointTouchArea.pointX) {
                                     multiPointTouchArea.startX = x
                                     multiPointTouchArea.xIsIncreasing = 0
                                     multiPointTouchArea.pointX = newValue
                                 } else if (multiPointTouchArea.xIsIncreasing === 0 && newValue > multiPointTouchArea.pointX) {
                                     multiPointTouchArea.startX = x
                                     multiPointTouchArea.xIsIncreasing = 1
                                     multiPointTouchArea.pointX = newValue
                                 } else {
                                     multiPointTouchArea.pointX = newValue
                                     focusedItem.pannedHorizontally(multiPointTouchArea.pointX / (multiPointTouchArea.width / 2))
                                 }
                             }
                         } else {
                             multiPointTouchArea.pointX = newValue

                             if (multiPointTouchArea.pointX > xThreshold) {
                                 multiPointTouchArea.startX = x
                                 swipeRight()
                             } else if (multiPointTouchArea.pointX < -xThreshold) {
                                 multiPointTouchArea.startX = x
                                 swipeLeft()
                             }
                         }
                     }
                 }

                 onYChanged: {
                     if (multiPointTouchArea.pressed) {
                         var newValue = multiPointTouchArea.startY - y

                         var focusedItem = appleTVInput.Window.window.activeFocusItem

                         if (focusedItem.panningEnabled) {
                             if (multiPointTouchArea.yIsIncreasing === -1) {
                                 multiPointTouchArea.yIsIncreasing = (newValue > multiPointTouchArea.startY) ? 1 : 0
                             } else {
                                 if (multiPointTouchArea.yIsIncreasing === 1 && newValue < multiPointTouchArea.pointY) {
                                     multiPointTouchArea.startY = y
                                     multiPointTouchArea.yIsIncreasing = 0
                                     multiPointTouchArea.pointY = newValue
                                 } else if (multiPointTouchArea.yIsIncreasing === 0 && newValue > multiPointTouchArea.pointY) {
                                     multiPointTouchArea.startY = y
                                     multiPointTouchArea.yIsIncreasing = 1
                                     multiPointTouchArea.pointY = newValue
                                 } else {
                                     multiPointTouchArea.pointY = newValue
                                     focusedItem.pannedVertically(multiPointTouchArea.pointY / (multiPointTouchArea.height / 2))
                                 }
                             }
                         } else {
                             multiPointTouchArea.pointY = newValue

                             if (multiPointTouchArea.pointY > yThreshold) {
                                 multiPointTouchArea.startY = y
                                 swipeUp()
                             } else if (multiPointTouchArea.pointY < -yThreshold) {
                                 multiPointTouchArea.startY = y
                                 swipeDown()
                             }
                         }
                     }
                 }
             }
         ]
     }
 }