Qt 5.6 | Qt Quick | Qt Quick Demo - StocQt | StockListView.qml Example File

Qt 5.6.2 Reference Documentation

# StockListView.qml Example File

demos/stocqt/content/StockListView.qml

      /****************************************************************************
      **
      ** Copyright (C) 2015 The Qt Company Ltd.
      ** Contact: http://www.qt.io/licensing/
      **
      ** This file is part of the examples of the Qt Toolkit.
      **
      ** $QT_BEGIN_LICENSE:BSD$
      ** 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
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      **   * Redistributions of source code must retain the above copyright
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      **     contributors may be used to endorse or promote products derived
      **     from this software without specific prior written permission.
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      import QtQuick 2.0
      import "."

      Rectangle {
          id: root
          width: 320
          height: 410
          anchors.top: parent.top
          anchors.bottom: parent.bottom
          color: "white"

          property string currentStockId: ""
          property string currentStockName: ""

          ListView {
              id: view
              anchors.fill: parent
              width: parent.width
              clip: true
              keyNavigationWraps: true
              highlightMoveDuration: 0
              focus: true
              snapMode: ListView.SnapToItem
              model: StockListModel{}
              currentIndex: -1 // Don't pre-select any item

              function requestUrl(stockId) {
                  var endDate = new Date(""); //today
                  var startDate = new Date()
                  startDate.setDate(startDate.getDate() - 5);

                  var request = "http://ichart.finance.yahoo.com/table.csv?";
                  request += "s=" + stockId;
                  request += "&g=d";
                  request += "&a=" + startDate.getMonth();
                  request += "&b=" + startDate.getDate();
                  request += "&c=" + startDate.getFullYear();
                  request += "&d=" + endDate.getMonth();
                  request += "&e=" + endDate.getDate();
                  request += "&f=" + endDate.getFullYear();
                  request += "&g=d";
                  request += "&ignore=.csv";
                  return request;
              }

              function getCloseValue(index) {
                  var req = requestUrl(model.get(index).stockId);

                  if (!req)
                      return;

                  var xhr = new XMLHttpRequest;

                  xhr.open("GET", req, true);

                  xhr.onreadystatechange = function() {
                      if (xhr.readyState === XMLHttpRequest.LOADING || xhr.readyState === XMLHttpRequest.DONE) {
                          var records = xhr.responseText.split('\n');
                          if (records.length > 0 && xhr.status == 200) {
                              var r = records[1].split(',');
                              var today = parseFloat(r[4]);
                              model.setProperty(index, "value", today.toFixed(2));

                              r = records[2].split(',');
                              var yesterday = parseFloat(r[4]);
                              var change = today - yesterday;
                              if (change >= 0.0)
                                  model.setProperty(index, "change", "+" + change.toFixed(2));
                              else
                                  model.setProperty(index, "change", change.toFixed(2));

                              var changePercentage = (change / yesterday) * 100.0;
                              if (changePercentage >= 0.0)
                                  model.setProperty(index, "changePercentage", "+" + changePercentage.toFixed(2) + "%");
                              else
                                  model.setProperty(index, "changePercentage", changePercentage.toFixed(2) + "%");
                          } else {
                              var unknown = "n/a";
                              model.set(index, {"value": unknown, "change": unknown, "changePercentage": unknown});
                          }
                      }
                  }
                  xhr.send()
              }

              onCurrentIndexChanged: {
                  if (currentItem) {
                      root.currentStockId = model.get(currentIndex).stockId;
                      root.currentStockName = model.get(currentIndex).name;
                  }
              }

              delegate: Rectangle {
                  height: 102
                  width: parent.width
                  color: "transparent"
                  MouseArea {
                      anchors.fill: parent;
                      onClicked: {
                          if (view.currentIndex == index)
                              mainRect.currentIndex = 1;
                          else
                              view.currentIndex = index;
                      }
                  }

                  Text {
                      id: stockIdText
                      anchors.top: parent.top
                      anchors.topMargin: 15
                      anchors.left: parent.left
                      anchors.leftMargin: 15
                      width: 125
                      height: 40
                      color: "#000000"
                      font.family: Settings.fontFamily
                      font.pointSize: 20
                      font.weight: Font.Bold
                      verticalAlignment: Text.AlignVCenter
                      text: stockId
                  }

                  Text {
                      id: stockValueText
                      anchors.top: parent.top
                      anchors.topMargin: 15
                      anchors.right: parent.right
                      anchors.rightMargin: 0.31 * parent.width
                      width: 190
                      height: 40
                      color: "#000000"
                      font.family: Settings.fontFamily
                      font.pointSize: 20
                      font.bold: true
                      horizontalAlignment: Text.AlignRight
                      verticalAlignment: Text.AlignVCenter
                      text: value
                      Component.onCompleted: view.getCloseValue(index);
                  }

                  Text {
                      id: stockValueChangeText
                      anchors.top: parent.top
                      anchors.topMargin: 15
                      anchors.right: parent.right
                      anchors.rightMargin: 20
                      width: 135
                      height: 40
                      color: "#328930"
                      font.family: Settings.fontFamily
                      font.pointSize: 20
                      font.bold: true
                      horizontalAlignment: Text.AlignRight
                      verticalAlignment: Text.AlignVCenter
                      text: change
                      onTextChanged: {
                          if (parseFloat(text) >= 0.0)
                              color = "#328930";
                          else
                              color = "#d40000";
                      }
                  }

                  Text {
                      id: stockNameText
                      anchors.top: stockIdText.bottom
                      anchors.left: parent.left
                      anchors.leftMargin: 15
                      width: 330
                      height: 30
                      color: "#000000"
                      font.family: Settings.fontFamily
                      font.pointSize: 16
                      font.bold: false
                      elide: Text.ElideRight
                      maximumLineCount: 1
                      verticalAlignment: Text.AlignVCenter
                      text: name
                  }

                  Text {
                      id: stockValueChangePercentageText
                      anchors.top: stockIdText.bottom
                      anchors.right: parent.right
                      anchors.rightMargin: 20
                      width: 120
                      height: 30
                      color: "#328930"
                      font.family: Settings.fontFamily
                      font.pointSize: 18
                      font.bold: false
                      horizontalAlignment: Text.AlignRight
                      verticalAlignment: Text.AlignVCenter
                      text: changePercentage
                      onTextChanged: {
                          if (parseFloat(text) >= 0.0)
                              color = "#328930";
                          else
                              color = "#d40000";
                      }
                  }

                  Rectangle {
                      id: endingLine
                      anchors.bottom: parent.bottom
                      anchors.left: parent.left
                      height: 1
                      width: parent.width
                      color: "#d7d7d7"
                  }
              }

              highlight: Rectangle {
                  width: view.width
                  color: "#eeeeee"
              }
          }
      }