Qt 4.8: Curtain.qml Example File (declarative/shadereffects/qml/shadereffects/Curtain.qml)

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# Curtain.qml Example File

declarative/shadereffects/qml/shadereffects/Curtain.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.
     **
     ** $QT_BEGIN_LICENSE:LGPL$
     ** 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
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     ** conditions see http://qt.digia.com/licensing.  For further information
     ** use the contact form at http://qt.digia.com/contact-us.
     **
     ** GNU Lesser General Public License Usage
     ** Alternatively, this file may be used under the terms of the GNU Lesser
     ** General Public License version 2.1 as published by the Free Software
     ** Foundation and appearing in the file LICENSE.LGPL included in the
     ** packaging of this file.  Please review the following information to
     ** ensure the GNU Lesser General Public License version 2.1 requirements
     ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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     ** rights.  These rights are described in the Digia Qt LGPL Exception
     ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
     **
     ** 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
     ** packaging of this file.  Please review the following information to
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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;
                 }
             }
         }
     }