- Qt 5.3
- Qt Quick
- Qt Quick Examples - Animation
- color-animation.qml Example File
- Qt 5.3.2 Reference Documentation

# color-animation.qml Example File

animation/basics/color-animation.qml

    /****************************************************************************
    **
    ** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
    ** Contact: http://www.qt-project.org/legal
    **
    ** 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 Digia Plc and its Subsidiary(-ies) 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,
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    ** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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    ****************************************************************************/

    import QtQuick 2.0
    import QtQuick.Particles 2.0

    Item {
        id: window
        width: 320; height: 480

        // Let's draw the sky...
        Rectangle {
            anchors { left: parent.left; top: parent.top; right: parent.right; bottom: parent.verticalCenter }
            gradient: Gradient {
                GradientStop {
                    position: 0.0
                    SequentialAnimation on color {
                        loops: Animation.Infinite
                        ColorAnimation { from: "DeepSkyBlue"; to: "#0E1533"; duration: 5000 }
                        ColorAnimation { from: "#0E1533"; to: "DeepSkyBlue"; duration: 5000 }
                    }
                }
                GradientStop {
                    position: 1.0
                    SequentialAnimation on color {
                        loops: Animation.Infinite
                        ColorAnimation { from: "SkyBlue"; to: "#437284"; duration: 5000 }
                        ColorAnimation { from: "#437284"; to: "SkyBlue"; duration: 5000 }
                    }
                }
            }
        }

        // the sun, moon, and stars
        Item {
            width: parent.width; height: 2 * parent.height
            NumberAnimation on rotation { from: 0; to: 360; duration: 10000; loops: Animation.Infinite }
            Image {
                source: "images/sun.png"; y: 10; anchors.horizontalCenter: parent.horizontalCenter
                rotation: -3 * parent.rotation
            }
            Image {
                source: "images/moon.png"; y: parent.height - 74; anchors.horizontalCenter: parent.horizontalCenter
                rotation: -parent.rotation
            }
            ParticleSystem {
                id: particlesystem
                x: 0; y: parent.height/2
                width: parent.width; height: parent.height/2
                ImageParticle {
                    source: "images/star.png"
                    groups: ["star"]
                    color: "#00333333"
                    SequentialAnimation on opacity {
                        loops: Animation.Infinite
                        NumberAnimation { from: 0; to: 1; duration: 5000 }
                        NumberAnimation { from: 1; to: 0; duration: 5000 }
                    }
                }
                Emitter {
                    group: "star"
                    anchors.fill: parent
                    emitRate: parent.width / 50
                    lifeSpan: 5000
                }
            }
        }

        // ...and the ground.
        Rectangle {
            anchors { left: parent.left; top: parent.verticalCenter; right: parent.right; bottom: parent.bottom }
            gradient: Gradient {
                GradientStop {
                    position: 0.0
                    SequentialAnimation on color {
                        loops: Animation.Infinite
                        ColorAnimation { from: "ForestGreen"; to: "#001600"; duration: 5000 }
                        ColorAnimation { from: "#001600"; to: "ForestGreen"; duration: 5000 }
                    }
                }
                GradientStop { position: 1.0; color: "DarkGreen" }
            }
        }
    }