- Qt 5.15
- Qt Quick Demo - Tweet Search
- Qt 5.15.17 Reference Documentation

# Qt Quick Demo - Tweet Search

     /****************************************************************************
     **
     ** 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 2.0
     import "content"
     import "content/tweetsearch.mjs" as Helper

     Rectangle {
         id: main
         width: 320
         height: 480
         color: "#d6d6d6"

         property int inAnimDur: 250
         property int counter: 0
         property var idx
         property var ids

         Component.onCompleted: ids = new Array()

         function idInModel(id)
         {
             for (var j = 0; j < ids.length; j++)
                 if (ids[j] === id)
                     return 1
             return 0
         }

         TweetsModel {
             id: tweetsModel
             onIsLoaded: {
                 console.debug("Reload")
                 idx = new Array()
                 for (var i = 0; i < tweetsModel.model.count; i++) {
                     var id = tweetsModel.model.get(i).id
                     if (!idInModel(id))
                         idx.push(i)
                 }
                 console.debug(idx.length + " new tweets")
                 main.counter = idx.length
             }
         }

         Timer {
             id: timer
             interval: 500; running: main.counter; repeat: true
             onTriggered: {
                 main.counter--;
                 var id = tweetsModel.model.get(idx[main.counter]).id
                 var item = tweetsModel.model.get(main.counter)
                 mainListView.add( { "statusText": Helper.insertLinks(item.text, item.entities),
                                     "twitterName": item.user.screen_name,
                                     "name" : item.user.name,
                                     "userImage": item.user.profile_image_url,
                                     "source": item.source,
                                     "id": id,
                                      "uri": Helper.insertLinks(item.user.url, item.user.entities),
                                     "published": item.created_at } );
                 ids.push(id)
             }
         }

         ListView {
             id: mainListView
             anchors.fill: parent
             delegate: TweetDelegate { }
             model: ListModel { id: finalModel }

             add: Transition {
                 NumberAnimation { property: "hm"; from: 0; to: 1.0; duration: 300; easing.type: Easing.OutQuad }
                 PropertyAction { property: "appear"; value: 250 }
             }

             onDragEnded: if (header.refresh) { tweetsModel.reload() }

             ListHeader {
                 id: header
                 y: -mainListView.contentY - height
             }

             footer: ListFooter { }

             function clear() {
                 ids = new Array()
                 model.clear()
             }

             function add(obj) {
                 model.insert(0, obj)
             }

             signal autoSearch(string type, string str) // To communicate with Footer instance
         }
     }