Content.qml Example File

video/qmlvideo/qml/qmlvideo/Content.qml
/****************************************************************************
**
** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** 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 Digia. For licensing terms and
** 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 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.
**
** In addition, as a special exception, Digia gives you certain additional
** rights. These rights are described in the Digia Qt 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
    border.color: "white"
    border.width: showBorder ? 1 : 0
    color: "transparent"
    property string contentType // "camera" or "video"
    property string source
    property real volume
    property bool dummy: false
    property bool autoStart: true
    property bool started: false
    property bool showFrameRate: false
    property bool showBorder: false

    signal initialized
    signal error
    signal videoFramePainted

    Loader {
        id: contentLoader
    }

    Connections {
        id: framePaintedConnection
        onFramePainted: {
            if (frameRateLoader.item)
                frameRateLoader.item.notify()
            root.videoFramePainted()
        }
        ignoreUnknownSignals: true
    }

    Connections {
        id: errorConnection
        onFatalError: {
            console.log("[qmlvideo] Content.onFatalError")
            stop()
            root.error()
        }
        ignoreUnknownSignals: true
    }

    Loader {
        id: frameRateLoader
        source: root.showFrameRate ? "../frequencymonitor/FrequencyItem.qml" : ""
        onLoaded: {
            item.parent = root
            item.anchors.top = root.top
            item.anchors.right = root.right
            item.anchors.margins = 10
        }
    }

    onWidthChanged: {
        if (contentItem())
            contentItem().width = width
    }

    onHeightChanged: {
        if (contentItem())
            contentItem().height = height
    }

    function initialize() {
        if ("video" == contentType) {
            contentLoader.source = "VideoItem.qml"
            if (Loader.Error == contentLoader.status) {
                contentLoader.source = "VideoDummy.qml"
                dummy = true
            }
            contentLoader.item.volume = volume
        } else if ("camera" == contentType) {
            contentLoader.source = "CameraItem.qml"
            if (Loader.Error == contentLoader.status) {
                contentLoader.source = "CameraDummy.qml"
                dummy = true
            }
        } else {
            console.log("[qmlvideo] Content.initialize: error: invalid contentType")
        }
        if (contentLoader.item) {
            contentLoader.item.sizeChanged.connect(updateRootSize)
            contentLoader.item.parent = root
            contentLoader.item.width = root.width
            framePaintedConnection.target = contentLoader.item
            errorConnection.target = contentLoader.item
            if (root.autoStart)
                root.start()
        }
        root.initialized()
    }

    function start() {
        if (contentLoader.item) {
            if (root.contentType == "video")
                contentLoader.item.mediaSource = root.source
            contentLoader.item.start()
            root.started = true
        }
    }

    function stop() {
        if (contentLoader.item) {
            contentLoader.item.stop()
            if (root.contentType == "video")
                contentLoader.item.mediaSource = ""
            root.started = false
        }
    }

    function contentItem() { return contentLoader.item }
    function updateRootSize() { root.height = contentItem().height }
}

© 2015 The Qt Company Ltd. Documentation contributions included herein are the copyrights of their respective owners. The documentation provided herein is licensed under the terms of the GNU Free Documentation License version 1.3 as published by the Free Software Foundation. Qt and respective logos are trademarks of The Qt Company Ltd in Finland and/or other countries worldwide. All other trademarks are property of their respective owners.