ValueSource.qml Example File

dashboard/qml/ValueSource.qml 
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 import QtQuick 2.2
 Item {
     id: valueSource
     property real kph: 0
     property real rpm: 1
     property real fuel: 0.85
     property string gear: {
         var g;
         if (kph == 0) {
             return "P";
         }
         if (kph < 30) {
             return "1";
         }
         if (kph < 50) {
             return "2";
         }
         if (kph < 80) {
             return "3";
         }
         if (kph < 120) {
             return "4";
         }
         if (kph < 160) {
             return "5";
         }
     }
     property int turnSignal: gear == "P" && !start ? randomDirection() : -1
     property real temperature: 0.6
     property bool start: true

     function randomDirection() {
         return Math.random() > 0.5 ? Qt.LeftArrow : Qt.RightArrow;
     }

     SequentialAnimation {
         running: true
         loops: 1

         // We want a small pause at the beginning, but we only want it to happen once.
         PauseAnimation {
             duration: 1000
         }

         PropertyAction {
             target: valueSource
             property: "start"
             value: false
         }

         SequentialAnimation {
             loops: Animation.Infinite
             ParallelAnimation {
                 NumberAnimation {
                     target: valueSource
                     property: "kph"
                     easing.type: Easing.InOutSine
                     from: 0
                     to: 30
                     duration: 3000
                 }
                 NumberAnimation {
                     target: valueSource
                     property: "rpm"
                     easing.type: Easing.InOutSine
                     from: 1
                     to: 6.1
                     duration: 3000
                 }
             }
             ParallelAnimation {
                 // We changed gears so we lost a bit of speed.
                 NumberAnimation {
                     target: valueSource
                     property: "kph"
                     easing.type: Easing.InOutSine
                     from: 30
                     to: 26
                     duration: 600
                 }
                 NumberAnimation {
                     target: valueSource
                     property: "rpm"
                     easing.type: Easing.InOutSine
                     from: 6
                     to: 2.4
                     duration: 600
                 }
             }
             ParallelAnimation {
                 NumberAnimation {
                     target: valueSource
                     property: "kph"
                     easing.type: Easing.InOutSine
                     to: 60
                     duration: 3000
                 }
                 NumberAnimation {
                     target: valueSource
                     property: "rpm"
                     easing.type: Easing.InOutSine
                     to: 5.6
                     duration: 3000
                 }
             }
             ParallelAnimation {
                 // We changed gears so we lost a bit of speed.
                 NumberAnimation {
                     target: valueSource
                     property: "kph"
                     easing.type: Easing.InOutSine
                     to: 56
                     duration: 600
                 }
                 NumberAnimation {
                     target: valueSource
                     property: "rpm"
                     easing.type: Easing.InOutSine
                     to: 2.3
                     duration: 600
                 }
             }
             ParallelAnimation {
                 NumberAnimation {
                     target: valueSource
                     property: "kph"
                     easing.type: Easing.InOutSine
                     to: 100
                     duration: 3000
                 }
                 NumberAnimation {
                     target: valueSource
                     property: "rpm"
                     easing.type: Easing.InOutSine
                     to: 5.1
                     duration: 3000
                 }
             }
             ParallelAnimation {
                 // We changed gears so we lost a bit of speed.
                 NumberAnimation {
                     target: valueSource
                     property: "kph"
                     easing.type: Easing.InOutSine
                     to: 96
                     duration: 600
                 }
                 NumberAnimation {
                     target: valueSource
                     property: "rpm"
                     easing.type: Easing.InOutSine
                     to: 2.2
                     duration: 600
                 }
             }

             ParallelAnimation {
                 NumberAnimation {
                     target: valueSource
                     property: "kph"
                     easing.type: Easing.InOutSine
                     to: 140
                     duration: 3000
                 }
                 NumberAnimation {
                     target: valueSource
                     property: "rpm"
                     easing.type: Easing.InOutSine
                     to: 6.2
                     duration: 3000
                 }
             }

             // Start downshifting.

             // Fifth to fourth gear.
             ParallelAnimation {
                 NumberAnimation {
                     target: valueSource
                     property: "kph"
                     easing.type: Easing.Linear
                     to: 100
                     duration: 5000
                 }

                 NumberAnimation {
                     target: valueSource
                     property: "rpm"
                     easing.type: Easing.InOutSine
                     to: 3.1
                     duration: 5000
                 }
             }

             // Fourth to third gear.
             NumberAnimation {
                 target: valueSource
                 property: "rpm"
                 easing.type: Easing.InOutSine
                 to: 5.5
                 duration: 600
             }

             ParallelAnimation {
                 NumberAnimation {
                     target: valueSource
                     property: "kph"
                     easing.type: Easing.InOutSine
                     to: 60
                     duration: 5000
                 }
                 NumberAnimation {
                     target: valueSource
                     property: "rpm"
                     easing.type: Easing.InOutSine
                     to: 2.6
                     duration: 5000
                 }
             }

             // Third to second gear.
             NumberAnimation {
                 target: valueSource
                 property: "rpm"
                 easing.type: Easing.InOutSine
                 to: 6.3
                 duration: 600
             }

             ParallelAnimation {
                 NumberAnimation {
                     target: valueSource
                     property: "kph"
                     easing.type: Easing.InOutSine
                     to: 30
                     duration: 5000
                 }
                 NumberAnimation {
                     target: valueSource
                     property: "rpm"
                     easing.type: Easing.InOutSine
                     to: 2.6
                     duration: 5000
                 }
             }

             NumberAnimation {
                 target: valueSource
                 property: "rpm"
                 easing.type: Easing.InOutSine
                 to: 6.5
                 duration: 600
             }

             // Second to first gear.
             ParallelAnimation {
                 NumberAnimation {
                     target: valueSource
                     property: "kph"
                     easing.type: Easing.InOutSine
                     to: 0
                     duration: 5000
                 }
                 NumberAnimation {
                     target: valueSource
                     property: "rpm"
                     easing.type: Easing.InOutSine
                     to: 1
                     duration: 4500
                 }
             }

             PauseAnimation {
                 duration: 5000
             }
         }
     }
 }

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