- Qt 5.5
- Qt Quick Extras
- Qt Quick Extras - Dashboard
- ValueSource.qml Example File
- Qt 5.5.1 Reference Documentation

# ValueSource.qml Example File

dashboard/qml/ValueSource.qml

    /****************************************************************************
    **
    ** Copyright (C) 2015 The Qt Company Ltd.
    ** Contact: http://www.qt.io/licensing/
    **
    ** This file is part of the examples of the Qt Toolkit.
    **
    ** $QT_BEGIN_LICENSE:BSD$
    ** You may use this file under the terms of the BSD license as follows:
    **
    ** "Redistribution and use in source and binary forms, with or without
    ** modification, are permitted provided that the following conditions are
    ** met:
    **   * Redistributions of source code must retain the above copyright
    **     notice, this list of conditions and the following disclaimer.
    **   * Redistributions in binary form must reproduce the above copyright
    **     notice, this list of conditions and the following disclaimer in
    **     the documentation and/or other materials provided with the
    **     distribution.
    **   * Neither the name of The Qt Company Ltd nor the names of its
    **     contributors may be used to endorse or promote products derived
    **     from this software without specific prior written permission.
    **
    **
    ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
    ** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
    ** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
    ** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
    ** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
    ** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
    ** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
    ** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
    ** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
    ** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
    ** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
    **
    ** $QT_END_LICENSE$
    **
    ****************************************************************************/

    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
                }
            }
        }
    }