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# Curtain.qml Example File

declarative/shadereffects/qml/shadereffects/Curtain.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.
     **
     ** $QT_BEGIN_LICENSE:LGPL$
     ** Commercial License Usage
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     ** Alternatively, this file may be used under the terms of the GNU Lesser
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     ** LICENSE.LGPLv3 included in the packaging of this file. Please review the
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     ** GNU General Public License Usage
     ** Alternatively, this file may be used under the terms of the GNU
     ** General Public License version 3.0 as published by the Free Software
     ** Foundation and appearing in the file LICENSE.GPL included in the
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     import QtQuick 1.0
     import Qt.labs.shaders 1.0

     Item {
         id: main
         anchors.fill: parent

         Rectangle{
             id: bg
             anchors.fill: parent
             color: "black"
         }

         Image {
             source: "images/qt-logo.png"
             anchors.centerIn: parent
         }

         Image {
             id: fabric
             anchors.fill: parent
             source: "images/fabric.jpg"
             fillMode: Image.Tile
         }

         CurtainEffect {
             id: curtain
             anchors.fill: fabric
             bottomWidth: topWidth
             source: ShaderEffectSource { sourceItem: fabric; hideSource: true }

             Behavior on bottomWidth {
                 SpringAnimation { easing.type: Easing.OutElastic; velocity: 250; mass: 1.5; spring: 0.5; damping: 0.05}
             }

             SequentialAnimation on topWidth {
                 id: topWidthAnim
                 loops: Animation.Infinite

                 NumberAnimation { to: 360; duration: 1000 }
                 PauseAnimation { duration: 2000 }
                 NumberAnimation { to: 180; duration: 1000 }
                 PauseAnimation { duration: 2000 }
             }
         }

         MouseArea {
             anchors.fill: parent

             onPressed: {
                 topWidthAnim.stop()
                 curtain.topWidth = mouseX;
             }

             onReleased: {
                 topWidthAnim.restart()
             }

             onPositionChanged: {
                 if (pressed) {
                     curtain.topWidth = mouseX;
                 }
             }
         }
     }