Qt 5.7 | Qt Quick Extras | Qt Quick Extras - Dashboard | ValueSource.qml Example File

Qt 5.7.1 Reference Documentation

# ValueSource.qml Example File

dashboard/qml/ValueSource.qml

      /****************************************************************************
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      ** Contact: https://www.qt.io/licensing/
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      ** This file is part of the examples of the Qt Toolkit.
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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
                  }
              }
          }
      }