- Qt 5.5
- Qt Multimedia
- QML Video Shader Effects Example
- Curtain.qml Example File
- Qt 5.5.1 Reference Documentation

# Curtain.qml Example File

video/qmlvideofx/qml/qmlvideofx/Curtain.qml

    /****************************************************************************
    **
    ** Copyright (C) 2015 The Qt Company Ltd.
    ** Contact: http://www.qt.io/licensing/
    **
    ** This file is part of the Qt Mobility Components.
    **
    ** $QT_BEGIN_LICENSE:LGPL21$
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    ** Alternatively, this file may be used under the terms of the GNU Lesser
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    import QtQuick 2.0

    Rectangle {
        id: root
        color: "transparent"
        radius: 5
        property alias value: grip.value
        property color gripColor: "transparent"
        property real gripSize: 20
        property real gripTolerance: 3.0
        property real increment: 0.1
        property bool enabled: true
        property string imageSource: "qrc:/images/Triangle_Top.png"

        Rectangle {
            id: grip
            property real value: 0.5
            x: (value * parent.width) - width/2
            anchors.verticalCenter: parent.verticalCenter
            width: root.gripTolerance * root.gripSize
            height: width
            radius: width/2
            color: "transparent"

            Image {
                id: sliderhandleimage
                source: imageSource
                anchors.centerIn: parent
            }

            MouseArea {
                id: mouseArea
                enabled: root.enabled
                anchors.fill:  parent
                drag {
                    target: grip
                    axis: Drag.XAxis
                    minimumX: -parent.width/2
                    maximumX: root.width - parent.width/2
                }
                onPositionChanged:  {
                    if (drag.active)
                        updatePosition()
                }
                onReleased: {
                    updatePosition()
                }
                function updatePosition() {
                    value = (grip.x + grip.width/2) / grip.parent.width
                }
            }
        }
    }