Qt 5.13 | Qt Quick Demo - RSS News

Qt 5.13.2 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()
                  }
              }
          }
      }