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

# Main.qml Example File

video/qmlvideofx/qml/qmlvideofx/Main.qml

    /****************************************************************************
    **
    ** Copyright (C) 2015 The Qt Company Ltd.
    ** Contact: http://www.qt.io/licensing/
    **
    ** This file is part of the Qt Mobility Components.
    **
    ** $QT_BEGIN_LICENSE:LGPL21$
    ** Commercial License Usage
    ** Licensees holding valid commercial Qt licenses may use this file in
    ** accordance with the commercial license agreement provided with the
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    ** information use the contact form at http://www.qt.io/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 or version 3 as published by the Free
    ** Software Foundation and appearing in the file LICENSE.LGPLv21 and
    ** LICENSE.LGPLv3 included in the packaging of this file. Please review the
    ** following information to ensure the GNU Lesser General Public License
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    ** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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    ****************************************************************************/

    import QtQuick 2.1
    import QtQuick.Window 2.1

    Rectangle {
        id: root
        color: "black"
        property string fileName
        property alias volume: content.volume
        property bool perfMonitorsLogging: false
        property bool perfMonitorsVisible: false
        property int pixDens: Math.ceil(Screen.pixelDensity)
        property int itemWidth: 25 * pixDens
        property int itemHeight: 10 * pixDens
        property int windowWidth: Screen.desktopAvailableWidth
        property int windowHeight: Screen.desktopAvailableHeight
        property int scaledMargin: 2 * pixDens
        property int fontSize: 5 * pixDens

        QtObject {
            id: d
            property real gripSize: 20
        }

        Content {
            id: content
            color: "transparent"
            anchors {
                top: parent.top
                left: parent.left
                right: parent.right
                bottom: parameterPanel.top
                margins: scaledMargin
                leftMargin: scaledMargin + itemHeight
            }
            gripSize: d.gripSize
        }

        ParameterPanel {
            id: parameterPanel
            anchors {
                left: parent.left
                right: effectName.left
                bottom: parent.bottom
                margins: scaledMargin
                leftMargin: scaledMargin + itemHeight
            }
            gripSize: d.gripSize
            height: root.itemHeight * 2.5
            width: root.itemWidth * 3
        }

        Button {
            id: effectName
            anchors {
                        right: parent.right
                        bottom: perfHolder.top
                        margins: scaledMargin
                    }

            text: "No effect"
            width: itemWidth * 2
            height: itemHeight
            onClicked: {
                effectName.visible = false
                listview.visible = true
                lvbg.visible = true
            }
            color: "#303030"
        }

        Rectangle {
            id: lvbg
            width: itemWidth * 2
            color: "black"
            opacity: 0.8
            visible: false

            anchors {
                        right: parent.right
                        bottom: perfHolder.top
                        top: parent.top
                        margins: scaledMargin
                    }

            ListView {
                id: listview
                width: itemWidth * 2
                anchors.fill: parent
                visible: false

                model: EffectSelectionList {}
                delegate: effectDelegate

                clip: true
                focus: true

                Component {
                    id: effectDelegate
                    Button {
                        text: name
                        width: itemWidth * 2
                        onClicked: {
                            content.effectSource = source
                            listview.visible = false
                            lvbg.visible = false
                            effectName.text = name
                            effectName.visible = true
                            parameterPanel.model = content.effect.parameters

                        }
                    }
                }
            }
        }

        Rectangle {
            id: perfHolder
            color: "transparent"
            anchors {
                right: parent.right
                bottom: parent.bottom
                margins: scaledMargin
            }
            height: root.itemHeight * 1.5
            width: root.itemWidth

            Loader {
                id: performanceLoader
                function init() {
                    var enabled = root.perfMonitorsLogging || root.perfMonitorsVisible
                    source = enabled ? "../performancemonitor/PerformanceItem.qml" : ""
                }
                onLoaded: {
                    item.parent = perfHolder
                    item.anchors.top = perfHolder.top
                    item.anchors.bottom = perfHolder.bottom
                    item.anchors.left = perfHolder.left
                    item.anchors.right = perfHolder.right
                    item.logging = root.perfMonitorsLogging
                    item.displayed = root.perfMonitorsVisible
                    item.init()
                }
            }
        }

        FileOpen {
            id: fileOpen
            state: "collapsed"
            anchors {
                left: parent.left
                top: parent.top
                bottom: parent.bottom
                margins: scaledMargin
            }
            width: itemHeight + scaledMargin
            z: 2
            opacity: 0.9

            states: [
                State {
                    name: "expanded"
                    PropertyChanges {
                        target: fileOpen
                        width: itemWidth * 1.5
                        opacity: 0.8
                    }
                },
                State {
                    name: "collapsed"
                    PropertyChanges {
                        target: fileOpen
                        width: itemHeight + scaledMargin
                        opacity: 0.9
                    }
                }
            ]

            transitions: [
                Transition {
                    NumberAnimation { target: fileOpen; property: "width"; duration: 100 }
                    NumberAnimation { target: fileOpen; property: "opacity"; duration: 100 }
                }
            ]
        }

        FileBrowser {
            id: imageFileBrowser
            anchors.fill: root
            Component.onCompleted: fileSelected.connect(content.openImage)
        }

        FileBrowser {
            id: videoFileBrowser
            anchors.fill: root
            Component.onCompleted: fileSelected.connect(content.openVideo)
        }

        Component.onCompleted: {
            fileOpen.openImage.connect(openImage)
            fileOpen.openVideo.connect(openVideo)
            fileOpen.openCamera.connect(openCamera)
            fileOpen.close.connect(close)
        }

        function init() {
            if (Qt.platform.os === "linux" || Qt.platform.os === "windows" || Qt.platform.os === "osx" || Qt.platform.os === "unix") {
                if (Screen.desktopAvailableWidth > 1280) {
                    windowWidth = 1280
                }
                if (Screen.desktopAvailableHeight > 720) {
                    windowHeight = 720
                }
            }

            height = windowHeight
            width = windowWidth

            imageFileBrowser.folder = imagePath
            videoFileBrowser.folder = videoPath
            content.init()
            performanceLoader.init()
            if (fileName != "")
                content.openVideo(fileName)
        }

        function qmlFramePainted() {
            if (performanceLoader.item)
                performanceLoader.item.qmlFramePainted()
        }

        function openImage() {
            imageFileBrowser.show()
        }

        function openVideo() {
            videoFileBrowser.show()
        }

        function openCamera() {
            content.openCamera()
        }

        function close() {
            content.init()
        }
    }