Qt Reference Documentation

property-animation.qml Example File

declarative/animation/basics/property-animation.qml
 /****************************************************************************
 **
 ** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
 ** All rights reserved.
 ** Contact: Nokia Corporation (qt-info@nokia.com)
 **
 ** This file is part of the QtDeclarative module 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 Nokia Corporation 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,
 ** 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 Qt 4.7

 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; color: "DeepSkyBlue" }
             GradientStop { position: 1.0; color: "LightSkyBlue" }
         }
     }

     // ...and the ground.
     Rectangle {
         anchors { left: parent.left; top: parent.verticalCenter; right: parent.right; bottom: parent.bottom }
         gradient: Gradient {
             GradientStop { position: 0.0; color: "ForestGreen" }
             GradientStop { position: 1.0; color: "DarkGreen" }
         }
     }

     // The shadow for the smiley face
     Image {
         anchors.horizontalCenter: parent.horizontalCenter
         y: smiley.minHeight + 58
         source: "images/shadow.png"

         // The scale property depends on the y position of the smiley face.
         scale: smiley.y * 0.5 / (smiley.minHeight - smiley.maxHeight)
     }

     Image {
         id: smiley
         property int maxHeight: window.height / 3
         property int minHeight: 2 * window.height / 3

         anchors.horizontalCenter: parent.horizontalCenter
         y: minHeight
         source: "images/face-smile.png"

         // Animate the y property. Setting loops to Animation.Infinite makes the
         // animation repeat indefinitely, otherwise it would only run once.
         SequentialAnimation on y {
             loops: Animation.Infinite

             // Move from minHeight to maxHeight in 300ms, using the OutExpo easing function
             NumberAnimation {
                 from: smiley.minHeight; to: smiley.maxHeight
                 easing.type: Easing.OutExpo; duration: 300
             }

             // Then move back to minHeight in 1 second, using the OutBounce easing function
             NumberAnimation {
                 from: smiley.maxHeight; to: smiley.minHeight
                 easing.type: Easing.OutBounce; duration: 1000
             }

             // Then pause for 500ms
             PauseAnimation { duration: 500 }
         }
     }
 }
X

Thank you for giving your feedback.

Make sure it is related to this specific page. For more general bugs and requests, please use the Qt Bug Tracker.