/usr/share/qt5/doc/qtquick/qtquick-demos-stocqt-example.html is in qtdeclarative5-doc-html 5.9.5-0ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 | <?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE html>
<html lang="en">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<!-- stocqt.qdoc -->
<title>Qt Quick Demo - StocQt | Qt Quick 5.9</title>
<link rel="stylesheet" type="text/css" href="style/offline-simple.css" />
<script type="text/javascript">
document.getElementsByTagName("link").item(0).setAttribute("href", "style/offline.css");
// loading style sheet breaks anchors that were jumped to before
// so force jumping to anchor again
setTimeout(function() {
var anchor = location.hash;
// need to jump to different anchor first (e.g. none)
location.hash = "#";
setTimeout(function() {
location.hash = anchor;
}, 0);
}, 0);
</script>
</head>
<body>
<div class="header" id="qtdocheader">
<div class="main">
<div class="main-rounded">
<div class="navigationbar">
<table><tr>
<td >Qt 5.9</td><td ><a href="qtquick-index.html">Qt Quick</a></td><td >Qt Quick Demo - StocQt</td></tr></table><table class="buildversion"><tr>
<td id="buildversion" width="100%" align="right">Qt 5.9.5 Reference Documentation</td>
</tr></table>
</div>
</div>
<div class="content">
<div class="line">
<div class="content mainContent">
<div class="sidebar">
<div class="toc">
<h3><a name="toc">Contents</a></h3>
<ul>
<li class="level1"><a href="#running-the-example">Running the Example</a></li>
</ul>
</div>
<div class="sidebar-content" id="sidebar-content"></div></div>
<h1 class="title">Qt Quick Demo - StocQt</h1>
<span class="subtitle"></span>
<!-- $$$demos/stocqt-description -->
<div class="descr"> <a name="details"></a>
<p class="centerAlign"><img src="images/qtquick-demo-stocqt.png" alt="" /></p><p>The <i>StocQt</i> application presents a trend chart for the first stock in the list of NASDAQ-100 stocks maintained by it. It allows the user to choose another stock from the list, and fetches the required data for the selected stock by sending an <code>XMLHttpRequest</code> to http://finance.yahoo.com.</p>
<p>The application uses several custom types such as Button, CheckBox, StockChart, StockInfo, StockView, and so on. These types are used to present the stock data in a readable form and also let the user customize the trend chart. For example, the user can choose to view the yearly, monthly, or daily trends in the stock price.</p>
<p>The application uses the <a href="qtquick-views-example.html#objectmodel">ObjectModel</a> type to access the two visual data models that it depends on.</p>
<pre class="qml">
<span class="type"><a href="qml-qtquick-listview.html">ListView</a></span> {
<span class="name">id</span>: <span class="name">root</span>
...
<span class="name">model</span>: <span class="name">ObjectModel</span> {
<span class="type">StockListView</span> {
<span class="name">id</span>: <span class="name">listView</span>
<span class="name">width</span>: <span class="name">root</span>.<span class="name">width</span>
<span class="name">height</span>: <span class="name">root</span>.<span class="name">height</span>
}
<span class="type">StockView</span> {
<span class="name">id</span>: <span class="name">stockView</span>
<span class="name">width</span>: <span class="name">root</span>.<span class="name">width</span>
<span class="name">height</span>: <span class="name">root</span>.<span class="name">height</span>
<span class="name">stocklist</span>: <span class="name">listView</span>
<span class="name">stock</span>: <span class="name">stock</span>
}
}
}
</pre>
<p>The StockListView model is a static data model listing the NASDAQ-100 stocks with basic information such as stockId, name, value, change, and so on. This data model is used by the application if the user wants to choose another stock from the list.</p>
<p>StockView is a complex data model that presents a trend chart for the selected stock. It uses another custom type, StockChart, which presents the graphical trend of the stock price using a Canvas. This data model is used for most of the time during the lifetime of the application.</p>
<pre class="qml">
<span class="type"><a href="qml-qtquick-rectangle.html">Rectangle</a></span> {
<span class="name">id</span>: <span class="name">chart</span>
...
<span class="type"><a href="qml-qtquick-canvas.html">Canvas</a></span> {
<span class="name">id</span>: <span class="name">canvas</span>
...
<span class="name">onPaint</span>: {
<span class="name">numPoints</span> <span class="operator">=</span> <span class="name">stockModel</span>.<span class="name">indexOf</span>(<span class="name">chart</span>.<span class="name">startDate</span>);
<span class="keyword">if</span> (<span class="name">chart</span>.<span class="name">gridSize</span> <span class="operator">==</span> <span class="number">0</span>)
<span class="name">chart</span>.<span class="name">gridSize</span> <span class="operator">=</span> <span class="name">numPoints</span>
var <span class="name">ctx</span> = <span class="name">canvas</span>.<span class="name">getContext</span>(<span class="string">"2d"</span>);
<span class="name">ctx</span>.<span class="name">globalCompositeOperation</span> <span class="operator">=</span> <span class="string">"source-over"</span>;
<span class="name">ctx</span>.<span class="name">lineWidth</span> <span class="operator">=</span> <span class="number">1</span>;
<span class="name">drawBackground</span>(<span class="name">ctx</span>);
<span class="keyword">if</span> (!<span class="name">stockModel</span>.<span class="name">ready</span>) {
<span class="name">drawError</span>(<span class="name">ctx</span>, <span class="string">"No data available."</span>);
<span class="keyword">return</span>;
}
var <span class="name">highestPrice</span> = <span class="number">0</span>;
var <span class="name">highestVolume</span> = <span class="number">0</span>;
var <span class="name">lowestPrice</span> = -<span class="number">1</span>;
var <span class="name">points</span> = [];
<span class="keyword">for</span> (<span class="keyword">var</span> <span class="name">i</span> = <span class="name">numPoints</span>, <span class="name">j</span> = <span class="number">0</span>; <span class="name">i</span> <span class="operator">>=</span> <span class="number">0</span> ; <span class="name">i</span> <span class="operator">-=</span> <span class="name">pixelSkip</span>, <span class="name">j</span> <span class="operator">+=</span> <span class="name">pixelSkip</span>) {
var <span class="name">price</span> = <span class="name">stockModel</span>.<span class="name">get</span>(<span class="name">i</span>);
<span class="keyword">if</span> (<span class="name">parseFloat</span>(<span class="name">highestPrice</span>) <span class="operator"><</span> <span class="name">parseFloat</span>(<span class="name">price</span>.<span class="name">high</span>))
<span class="name">highestPrice</span> <span class="operator">=</span> <span class="name">price</span>.<span class="name">high</span>;
<span class="keyword">if</span> (<span class="name">parseInt</span>(<span class="name">highestVolume</span>, <span class="number">10</span>) <span class="operator"><</span> <span class="name">parseInt</span>(<span class="name">price</span>.<span class="name">volume</span>, <span class="number">10</span>))
<span class="name">highestVolume</span> <span class="operator">=</span> <span class="name">price</span>.<span class="name">volume</span>;
<span class="keyword">if</span> (<span class="name">lowestPrice</span> <span class="operator"><</span> <span class="number">0</span> <span class="operator">||</span> <span class="name">parseFloat</span>(<span class="name">lowestPrice</span>) <span class="operator">></span> <span class="name">parseFloat</span>(<span class="name">price</span>.<span class="name">low</span>))
<span class="name">lowestPrice</span> <span class="operator">=</span> <span class="name">price</span>.<span class="name">low</span>;
<span class="name">points</span>.<span class="name">push</span>({
x: <span class="name">j</span> <span class="operator">*</span> <span class="name">xGridStep</span>,
open: <span class="name">price</span>.<span class="name">open</span>,
close: <span class="name">price</span>.<span class="name">close</span>,
high: <span class="name">price</span>.<span class="name">high</span>,
low: <span class="name">price</span>.<span class="name">low</span>,
volume: <span class="name">price</span>.<span class="name">volume</span>
});
}
<span class="keyword">if</span> (<span class="name">settings</span>.<span class="name">drawHighPrice</span>)
<span class="name">drawPrice</span>(<span class="name">ctx</span>, <span class="number">0</span>, <span class="name">numPoints</span>, <span class="name">settings</span>.<span class="name">highColor</span>, <span class="string">"high"</span>, <span class="name">points</span>, <span class="name">highestPrice</span>, <span class="name">lowestPrice</span>);
<span class="keyword">if</span> (<span class="name">settings</span>.<span class="name">drawLowPrice</span>)
<span class="name">drawPrice</span>(<span class="name">ctx</span>, <span class="number">0</span>, <span class="name">numPoints</span>, <span class="name">settings</span>.<span class="name">lowColor</span>, <span class="string">"low"</span>, <span class="name">points</span>, <span class="name">highestPrice</span>, <span class="name">lowestPrice</span>);
<span class="keyword">if</span> (<span class="name">settings</span>.<span class="name">drawOpenPrice</span>)
<span class="name">drawPrice</span>(<span class="name">ctx</span>, <span class="number">0</span>, <span class="name">numPoints</span>,<span class="name">settings</span>.<span class="name">openColor</span>, <span class="string">"open"</span>, <span class="name">points</span>, <span class="name">highestPrice</span>, <span class="name">lowestPrice</span>);
<span class="keyword">if</span> (<span class="name">settings</span>.<span class="name">drawClosePrice</span>)
<span class="name">drawPrice</span>(<span class="name">ctx</span>, <span class="number">0</span>, <span class="name">numPoints</span>, <span class="name">settings</span>.<span class="name">closeColor</span>, <span class="string">"close"</span>, <span class="name">points</span>, <span class="name">highestPrice</span>, <span class="name">lowestPrice</span>);
<span class="name">drawVolume</span>(<span class="name">ctx</span>, <span class="number">0</span>, <span class="name">numPoints</span>, <span class="name">settings</span>.<span class="name">volumeColor</span>, <span class="string">"volume"</span>, <span class="name">points</span>, <span class="name">highestVolume</span>);
<span class="name">drawScales</span>(<span class="name">ctx</span>, <span class="name">highestPrice</span>, <span class="name">lowestPrice</span>, <span class="name">highestVolume</span>);
}
}
<span class="type"><a href="qml-qtquick-text.html">Text</a></span> {
<span class="name">id</span>: <span class="name">fromDate</span>
<span class="name">color</span>: <span class="string">"#000000"</span>
<span class="name">font</span>.family: <span class="name">Settings</span>.<span class="name">fontFamily</span>
<span class="name">font</span>.pointSize: <span class="number">8</span>
<span class="name">Layout</span>.alignment: <span class="name">Qt</span>.<span class="name">AlignLeft</span>
<span class="name">text</span>: <span class="string">"| "</span> <span class="operator">+</span> <span class="name">startDate</span>.<span class="name">toDateString</span>()
}
<span class="type"><a href="qml-qtquick-text.html">Text</a></span> {
<span class="name">id</span>: <span class="name">toDate</span>
<span class="name">color</span>: <span class="string">"#000000"</span>
<span class="name">font</span>.family: <span class="name">Settings</span>.<span class="name">fontFamily</span>
<span class="name">font</span>.pointSize: <span class="number">8</span>
<span class="name">Layout</span>.alignment: <span class="name">Qt</span>.<span class="name">AlignRight</span>
<span class="name">Layout</span>.rightMargin: <span class="name">canvas</span>.<span class="name">tickMargin</span>
<span class="name">Layout</span>.columnSpan: <span class="number">5</span>
<span class="name">text</span>: <span class="name">endDate</span>.<span class="name">toDateString</span>() <span class="operator">+</span> <span class="string">" |"</span>
}
}
}
</pre>
<p>To understand the application better, browse through its code using Qt Creator.</p>
<a name="running-the-example"></a>
<h2 id="running-the-example">Running the Example</h2>
<p>To run the example from Qt Creator, open the <b>Welcome</b> mode and select the example from <b>Examples</b>. For more information, visit Building and Running an Example.</p>
<p>Files:</p>
<ul>
<li><a href="qtquick-demos-stocqt-stocqt-qml.html">demos/stocqt/stocqt.qml</a></li>
<li><a href="qtquick-demos-stocqt-content-banner-qml.html">demos/stocqt/content/Banner.qml</a></li>
<li><a href="qtquick-demos-stocqt-content-button-qml.html">demos/stocqt/content/Button.qml</a></li>
<li><a href="qtquick-demos-stocqt-content-checkbox-qml.html">demos/stocqt/content/CheckBox.qml</a></li>
<li><a href="qtquick-demos-stocqt-content-settings-qml.html">demos/stocqt/content/Settings.qml</a></li>
<li><a href="qtquick-demos-stocqt-content-stockchart-qml.html">demos/stocqt/content/StockChart.qml</a></li>
<li><a href="qtquick-demos-stocqt-content-stockinfo-qml.html">demos/stocqt/content/StockInfo.qml</a></li>
<li><a href="qtquick-demos-stocqt-content-stocklistdelegate-qml.html">demos/stocqt/content/StockListDelegate.qml</a></li>
<li><a href="qtquick-demos-stocqt-content-stocklistmodel-qml.html">demos/stocqt/content/StockListModel.qml</a></li>
<li><a href="qtquick-demos-stocqt-content-stocklistview-qml.html">demos/stocqt/content/StockListView.qml</a></li>
<li><a href="qtquick-demos-stocqt-content-stockmodel-qml.html">demos/stocqt/content/StockModel.qml</a></li>
<li><a href="qtquick-demos-stocqt-content-stocksettingspanel-qml.html">demos/stocqt/content/StockSettingsPanel.qml</a></li>
<li><a href="qtquick-demos-stocqt-content-stockview-qml.html">demos/stocqt/content/StockView.qml</a></li>
<li><a href="qtquick-demos-stocqt-content-windows-settings-qml.html">demos/stocqt/content/+windows/Settings.qml</a></li>
<li><a href="qtquick-demos-stocqt-main-cpp.html">demos/stocqt/main.cpp</a></li>
<li><a href="qtquick-demos-stocqt-stocqt-pro.html">demos/stocqt/stocqt.pro</a></li>
<li><a href="qtquick-demos-stocqt-stocqt-qmlproject.html">demos/stocqt/stocqt.qmlproject</a></li>
<li><a href="qtquick-demos-stocqt-stocqt-qrc.html">demos/stocqt/stocqt.qrc</a></li>
<li><a href="qtquick-demos-stocqt-content-qmldir.html">demos/stocqt/content/qmldir</a></li>
</ul>
</div>
<p><b>See also </b>QML Applications.</p>
<!-- @@@demos/stocqt -->
</div>
</div>
</div>
</div>
</div>
<div class="footer">
<p>
<acronym title="Copyright">©</acronym> 2017 The Qt Company Ltd.
Documentation contributions included herein are the copyrights of
their respective owners.<br> The documentation provided herein is licensed under the terms of the <a href="http://www.gnu.org/licenses/fdl.html">GNU Free Documentation License version 1.3</a> as published by the Free Software Foundation.<br> Qt and respective logos are trademarks of The Qt Company Ltd. in Finland and/or other countries worldwide. All other trademarks are property
of their respective owners. </p>
</div>
</body>
</html>
|