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/****************************************************************************
**
** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** 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
** 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 Digia Plc and its Subsidiary(-ies) 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
ListModel {
id: model
property string stockId: ""
property string stockName: ""
property var startDate
property var endDate
property string stockDataCycle: "d"
property bool ready: false
property real stockPrice: 0.0
property real stockPriceChanged: 0.0
property real highestPrice: 0
property real highestVolume: 0
signal dataReady
function indexOf(date) {
var end = new Date(model.get(0).date);
var start = new Date(model.get(model.count - 1).date);
if (end <= date)
return model.count -1;
if (start >= date)
return 0;
for (var i = 0; i < model.count; i++) {
var d = new Date(model.get(i).date);
if ( d === date)
return i;
}
return -1;
}
function requestUrl() {
if (stockId === "")
return;
if (startDate === undefined)
startDate = new Date(1995, 3, 25); //default: 25 April 1995
if (endDate === undefined)
endDate = new Date(); //today
if (stockDataCycle !== "d" && stockDataCycle !== "w" && stockDataCycle !== "m")
stockDataCycle = "d";
/*
Fetch stock data from yahoo finance:
url: http://ichart.finance.yahoo.com/table.csv?s=NOK&a=5&b=11&c=2010&d=7&e=23&f=2010&g=d&ignore=.csv
s:stock name/id, a:start day, b:start month, c:start year default: 25 April 1995, oldest c= 1962
d:end day, e:end month, f:end year, default:today (data only available 3 days before today)
g:data cycle(d daily, w weekly, m monthly, v Dividend)
*/
var request = "http://ichart.finance.yahoo.com/table.csv?";
request += "s=" + stockId;
request += "&a=" + startDate.getDate();
request += "&b=" + startDate.getMonth();
request += "&c=" + startDate.getFullYear();
request += "&d=" + endDate.getDate();
request += "&e=" + endDate.getMonth();
request += "&f=" + endDate.getFullYear();
request += "&g=" + stockDataCycle;
request += "&ignore=.csv";
return request;
}
function createStockPrice(r) {
if (highestPrice < r[2])
highestPrice = r[2];
if (highestVolume < r[5])
highestVolume = r[5];
return {
"date": r[0],
"open":r[1],
"high":r[2],
"low":r[3],
"close":r[4],
"volume":r[5],
"adjusted":r[6]
};
}
function updateStock() {
var xhr = new XMLHttpRequest;
var req = requestUrl();
xhr.open("GET", req);
model.ready = false;
model.clear();
var i = 1; //skip the first line
xhr.onreadystatechange = function() {
if (xhr.readyState === XMLHttpRequest.LOADING || xhr.readyState === XMLHttpRequest.DONE) {
var records = xhr.responseText.split('\n');
for (;i < records.length; i++ ) {
var r = records[i].split(',');
if (r.length === 7)
model.append(createStockPrice(r));
}
if (xhr.readyState === XMLHttpRequest.DONE) {
if (model.count > 0) {
model.ready = true;
model.stockPrice = model.get(0).adjusted;
model.stockPriceChanged = Math.round((model.stockPrice - model.get(2).adjusted) * 100) / 100;
model.dataReady(); //emit signal
}
}
}
}
xhr.send()
}
}
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