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Diffstat (limited to 'examples/quick/demos/stocqt/content/StockModel.qml')
| -rw-r--r-- | examples/quick/demos/stocqt/content/StockModel.qml | 160 |
1 files changed, 160 insertions, 0 deletions
diff --git a/examples/quick/demos/stocqt/content/StockModel.qml b/examples/quick/demos/stocqt/content/StockModel.qml new file mode 100644 index 0000000000..b5a78548e4 --- /dev/null +++ b/examples/quick/demos/stocqt/content/StockModel.qml @@ -0,0 +1,160 @@ +/**************************************************************************** +** +** Copyright (C) 2012 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(); + console.log("getting " + req + " ....."); + + 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'); + console.log("Updating:" + (records.length - i) + " records for " + model.stockId + " from:" + model.startDate + " to " + model.endDate) + + 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) { + console.log("done, total:" + model.count); + 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() + } +} |