Qt Quick Demo - RSS News | Qt 5.15

- Qt 5.15
- Qt Quick Demo - RSS News
- Qt 5.15.5 Reference Documentation

# Qt Quick Demo - RSS News

     /****************************************************************************
     **
     ** Copyright (C) 2017 The Qt Company Ltd.
     ** Contact: https://www.qt.io/licensing/
     **
     ** This file is part of the examples of the Qt Toolkit.
     **
     ** $QT_BEGIN_LICENSE:BSD$
     ** 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 https://www.qt.io/terms-conditions. For further
     ** information use the contact form at https://www.qt.io/contact-us.
     **
     ** BSD License Usage
     ** Alternatively, you may use this file under the terms of the BSD license
     ** as follows:
     **
     ** "Redistribution and use in source and binary forms, with or without
     ** modification, are permitted provided that the following conditions are
     ** met:
     **   * Redistributions of source code must retain the above copyright
     **     notice, this list of conditions and the following disclaimer.
     **   * Redistributions in binary form must reproduce the above copyright
     **     notice, this list of conditions and the following disclaimer in
     **     the documentation and/or other materials provided with the
     **     distribution.
     **   * Neither the name of The Qt Company Ltd nor the names of its
     **     contributors may be used to endorse or promote products derived
     **     from this software without specific prior written permission.
     **
     **
     ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
     ** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
     ** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
     ** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
     ** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     ** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
     ** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     ** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     ** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     ** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     ** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
     **
     ** $QT_END_LICENSE$
     **
     ****************************************************************************/

     import QtQuick 2.2
     import QtQuick.XmlListModel 2.0
     import QtQuick.Window 2.1
     import "./content"

     Rectangle {
         id: window

         width: 800
         height: 480

         property string currentFeed: rssFeeds.get(0).feed
         property bool loading: feedModel.status === XmlListModel.Loading
         property bool isPortrait: Screen.primaryOrientation === Qt.PortraitOrientation

         onLoadingChanged: {
             if (feedModel.status == XmlListModel.Ready)
                 list.positionViewAtBeginning()
         }

         RssFeeds { id: rssFeeds }

         XmlListModel {
             id: feedModel

             source: "http://" + window.currentFeed
             query: "/rss/channel/item[child::media:content]"
             namespaceDeclarations: "declare namespace media = 'http://search.yahoo.com/mrss/';"

             XmlRole { name: "title"; query: "title/string()" }
             // Remove any links from the description
             XmlRole { name: "description"; query: "fn:replace(description/string(), '\&lt;a href=.*\/a\&gt;', '')" }
             XmlRole { name: "image"; query: "media:content/@url/string()" }
             XmlRole { name: "link"; query: "link/string()" }
             XmlRole { name: "pubDate"; query: "pubDate/string()" }
         }

         ListView {
             id: categories
             property int itemWidth: 190

             width: isPortrait ? parent.width : itemWidth
             height: isPortrait ? itemWidth : parent.height
             orientation: isPortrait ? ListView.Horizontal : ListView.Vertical
             anchors.top: parent.top
             model: rssFeeds
             delegate: CategoryDelegate { itemSize: categories.itemWidth }
             spacing: 3
         }

         ScrollBar {
             id: listScrollBar

             orientation: isPortrait ? Qt.Horizontal : Qt.Vertical
             height: isPortrait ? 8 : categories.height;
             width: isPortrait ? categories.width : 8
             scrollArea: categories;
             anchors.right: categories.right
         }

         ListView {
             id: list

             anchors.left: isPortrait ? window.left : categories.right
             anchors.right: closeButton.left
             anchors.top: isPortrait ? categories.bottom : window.top
             anchors.bottom: window.bottom
             anchors.leftMargin: 30
             anchors.rightMargin: 4
             clip: isPortrait
             model: feedModel
             footer: footerText
             delegate: NewsDelegate {}
         }

         ScrollBar {
             scrollArea: list
             width: 8
             anchors.right: window.right
             anchors.top: isPortrait ? categories.bottom : window.top
             anchors.bottom: window.bottom
         }

         Component {
             id: footerText

             Rectangle {
                 width: parent.width
                 height: closeButton.height
                 color: "lightgray"

                 Text {
                     text: "RSS Feed from Yahoo News"
                     anchors.centerIn: parent
                     font.pixelSize: 14
                 }
             }
         }

         Image {
             id: closeButton
             source: "content/images/btn_close.png"
             scale: 0.8
             anchors.top: parent.top
             anchors.right: parent.right
             anchors.margins: 4
             opacity: (isPortrait && categories.moving) ? 0.2 : 1.0
             Behavior on opacity {
                 NumberAnimation { duration: 300; easing.type: Easing.OutSine }
             }

             MouseArea {
                 anchors.fill: parent
                 onClicked: {
                     Qt.quit()
                 }
             }
         }
     }