color-animation.qml Example File

 /****************************************************************************
 **
 ** Copyright (C) 2017 The Qt Company Ltd.
 ** Contact: https://www.qt.io/licensing/
 **
 ** This file is part of the examples of the Qt Toolkit.
 **
 ** $QT_BEGIN_LICENSE:BSD$
 ** Commercial License Usage
 ** Licensees holding valid commercial Qt licenses may use this file in
 ** accordance with the commercial license agreement provided with the
 ** Software or, alternatively, in accordance with the terms contained in
 ** a written agreement between you and The Qt Company. For licensing terms
 ** and conditions see https://www.qt.io/terms-conditions. For further
 ** information use the contact form at https://www.qt.io/contact-us.
 **
 ** BSD License Usage
 ** Alternatively, 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 2.0
 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: "#14148c"; to: "#0E1533"; duration: 5000 }
                     ColorAnimation { from: "#0E1533"; to: "#14148c"; duration: 5000 }
                 }
             }
             GradientStop {
                 position: 1.0
                 SequentialAnimation on color {
                     loops: Animation.Infinite
                     ColorAnimation { from: "#14aaff"; to: "#437284"; duration: 5000 }
                     ColorAnimation { from: "#437284"; to: "#14aaff"; 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: "#80c342"; to: "#001600"; duration: 5000 }
                     ColorAnimation { from: "#001600"; to: "#80c342"; duration: 5000 }
                 }
             }
             GradientStop { position: 1.0; color: "#006325" }
         }
     }
 }