- Qt 5.5
- Qt Multimedia
- QML Video Example
- main.qml Example File
- Qt 5.5.1 Reference Documentation

# main.qml Example File

video/qmlvideo/qml/qmlvideo/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
    ** Software or, alternatively, in accordance with the terms contained in
    ** a written agreement between you and The Qt Company. For licensing terms
    ** and conditions see http://www.qt.io/terms-conditions. For further
    ** 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
    ** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
    ** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
    **
    ** As a special exception, The Qt Company gives you certain additional
    ** rights. These rights are described in The Qt Company LGPL Exception
    ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
    **
    ** $QT_END_LICENSE$
    **
    ****************************************************************************/

    import QtQuick 2.0

    Rectangle {
        id: root
        anchors.fill: parent
        color: "black"

        property string source1
        property string source2
        property color bgColor: "black"
        property real volume: 0.25
        property bool perfMonitorsLogging: false
        property bool perfMonitorsVisible: false

        QtObject {
            id: d
            property int itemHeight: root.height > root.width ? root.width / 10 : root.height / 10
            property int buttonHeight: 0.8 * itemHeight
            property int margins: 5
        }

        Loader {
            id: performanceLoader

            Connections {
                target: inner
                onVisibleChanged:
                    if (performanceLoader.item)
                        performanceLoader.item.enabled = !inner.visible
                ignoreUnknownSignals: true
            }

            function init() {
                var enabled = root.perfMonitorsLogging || root.perfMonitorsVisible
                source = enabled ? "../performancemonitor/PerformanceItem.qml" : ""
            }

            onLoaded: {
                item.parent = root
                item.anchors.fill = root
                item.logging = root.perfMonitorsLogging
                item.displayed = root.perfMonitorsVisible
                item.enabled = false
                item.init()
            }
        }

        Rectangle {
            id: inner
            anchors.fill: parent
            color: root.bgColor

            Button {
                id: openFile1Button
                anchors {
                    top: parent.top
                    left: parent.left
                    right: exitButton.left
                    margins: d.margins
                }
                bgColor: "#212121"
                bgColorSelected: "#757575"
                textColorSelected: "white"
                height: d.buttonHeight
                text: (root.source1 == "") ? "Select file 1" : root.source1
                onClicked: fileBrowser1.show()
            }

            Button {
                id: openFile2Button
                anchors {
                    top: openFile1Button.bottom
                    left: parent.left
                    right: exitButton.left
                    margins: d.margins
                }
                bgColor: "#212121"
                bgColorSelected: "#757575"
                textColorSelected: "white"
                height: d.buttonHeight
                text: (root.source2 == "") ? "Select file 2" : root.source2
                onClicked: fileBrowser2.show()
            }

            Button {
                id: exitButton
                anchors {
                    top: parent.top
                    right: parent.right
                    margins: d.margins
                }
                bgColor: "#212121"
                bgColorSelected: "#757575"
                textColorSelected: "white"
                width: parent.width / 10
                height: d.buttonHeight
                text: "Exit"
                onClicked: Qt.quit()
            }

            Row {
                id: modes
                anchors.top: openFile2Button.bottom
                anchors.margins: 0
                anchors.topMargin: 5
                Button {
                    width: root.width / 2
                    height: 0.8 * d.itemHeight
                    bgColor: "#212121"
                    radius: 0
                    text: "Video Modes"
                    enabled: false
                }
                Button {
                    width: root.width / 2
                    height: 0.8 * d.itemHeight
                    bgColor: "#212121"
                    radius: 0
                    text: "Camera Modes"
                    enabled: false
                }
            }

            Rectangle {
                id: divider
                height: 1
                width: parent.width
                color: "black"
                anchors.top: modes.bottom
            }

            SceneSelectionPanel {
                id: sceneSelectionPanel
                itemHeight: d.itemHeight
                color: "#212121"
                anchors {
                    top: divider.bottom
                    left: parent.left
                    right: parent.right
                    bottom: parent.bottom
                }
                radius: 0
                onSceneSourceChanged: {
                    sceneLoader.source = sceneSource
                    var scene = null
                    var innerVisible = true
                    if (sceneSource == "") {
                        if (performanceLoader.item)
                            performanceLoader.item.videoActive = false
                    } else {
                        scene = sceneLoader.item
                        if (scene) {
                            if (scene.contentType === "video" && source1 === "") {
                                errorDialog.show("You must first select a video file")
                                sceneSource = ""
                            } else {
                                scene.parent = root
                                scene.color = root.bgColor
                                scene.buttonHeight = d.buttonHeight
                                scene.source1 = source1
                                scene.source2 = source2
                                scene.volume = volume
                                scene.anchors.fill = root
                                scene.close.connect(closeScene)
                                scene.content.initialize()
                                innerVisible = false
                            }
                        }
                    }
                    videoFramePaintedConnection.target = scene
                    inner.visible = innerVisible
                }
            }
        }

        Loader {
            id: sceneLoader
        }

        Connections {
            id: videoFramePaintedConnection
            onVideoFramePainted: {
                if (performanceLoader.item)
                    performanceLoader.item.videoFramePainted()
            }
            ignoreUnknownSignals: true
        }

        FileBrowser {
            id: fileBrowser1
            anchors.fill: root
            onFolderChanged: fileBrowser2.folder = folder
            Component.onCompleted: fileSelected.connect(root.openFile1)
        }

        FileBrowser {
            id: fileBrowser2
            anchors.fill: root
            onFolderChanged: fileBrowser1.folder = folder
            Component.onCompleted: fileSelected.connect(root.openFile2)
        }

        function openFile1(path) {
            root.source1 = path
        }

        function openFile2(path) {
            root.source2 = path
        }

        ErrorDialog {
            id: errorDialog
            anchors.fill: root
            dialogWidth: d.itemHeight * 5
            dialogHeight: d.itemHeight * 3
            enabled: false
        }

        // Called from main() once root properties have been set
        function init() {
            performanceLoader.init()
            fileBrowser1.folder = videoPath
            fileBrowser2.folder = videoPath
        }

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

        function closeScene() {
            sceneSelectionPanel.sceneSource = ""
        }
    }