<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE html> <html lang="en"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <!-- examples-qmlcustomizations.qdoc --> <title>Qml Customizations | Qt Charts 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="qtcharts-index.html">Qt Charts</a></td><td ><a href="qtcharts-examples.html">Qt Charts Examples</a></td><td >Qml Customizations</td></tr></table><table class="buildversion"><tr> <td id="buildversion" width="100%" align="right">Qt 5.9.4 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> <li class="level1"><a href="#customizing-chart-views">Customizing Chart Views</a></li> </ul> </div> <div class="sidebar-content" id="sidebar-content"></div></div> <h1 class="title">Qml Customizations</h1> <span class="subtitle"></span> <!-- $$$qmlcustomizations-description --> <div class="descr"> <a name="details"></a> <p class="centerAlign"><img src="images/examples_qmlcustomizations.png" alt="" /></p><p>This example shows a wheel of fortune by customizing a pie series.</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> <a name="customizing-chart-views"></a> <h2 id="customizing-chart-views">Customizing Chart Views</h2> <p>First we create the <a href="qml-qtcharts-chartview.html">ChartView</a> and a couple of series.</p> <pre class="qml"> <span class="type"><a href="qml-qtcharts-chartview.html">ChartView</a></span> { <span class="name">id</span>: <span class="name">chartView</span> <span class="name">anchors</span>.fill: <span class="name">parent</span> <span class="name">title</span>: <span class="string">"Wheel of fortune"</span> <span class="name">legend</span>.visible: <span class="number">false</span> <span class="name">antialiasing</span>: <span class="number">true</span> <span class="type"><a href="qml-qtcharts-pieseries.html">PieSeries</a></span> { <span class="name">id</span>: <span class="name">wheelOfFortune</span> <span class="name">horizontalPosition</span>: <span class="number">0.3</span> } <span class="type"><a href="qml-qtcharts-splineseries.html">SplineSeries</a></span> { <span class="name">id</span>: <span class="name">splineSeries</span> } <span class="type"><a href="qml-qtcharts-scatterseries.html">ScatterSeries</a></span> { <span class="name">id</span>: <span class="name">scatterSeries</span> } } </pre> <p>The application data is generated in Component.onCompleted of the main rectangle:</p> <pre class="qml"> <span class="name">Component</span>.onCompleted: { <span class="name">__intervalCoefficient</span> <span class="operator">=</span> <span class="name">Math</span>.<span class="name">random</span>() <span class="operator">+</span> <span class="number">0.25</span>; <span class="keyword">for</span> (<span class="keyword">var</span> <span class="name">i</span> = <span class="number">0</span>; <span class="name">i</span> <span class="operator"><</span> <span class="number">20</span>; i++) <span class="name">wheelOfFortune</span>.<span class="name">append</span>(<span class="string">""</span>, <span class="number">1</span>); var <span class="name">interval</span> = <span class="number">1</span>; <span class="keyword">for</span> (<span class="keyword">var</span> <span class="name">j</span> = <span class="number">0</span>; <span class="name">interval</span> <span class="operator"><</span> <span class="number">800</span>; j++) { <span class="name">interval</span> <span class="operator">=</span> <span class="name">__intervalCoefficient</span> <span class="operator">*</span> <span class="name">j</span> <span class="operator">*</span> <span class="name">j</span>; <span class="name">splineSeries</span>.<span class="name">append</span>(<span class="name">j</span>, <span class="name">interval</span>); } <span class="name">chartView</span>.<span class="name">axisX</span>(<span class="name">scatterSeries</span>).<span class="name">max</span> <span class="operator">=</span> <span class="name">j</span>; <span class="name">chartView</span>.<span class="name">axisY</span>(<span class="name">scatterSeries</span>).<span class="name">max</span> <span class="operator">=</span> <span class="number">1000</span>; } </pre> <p>The following customizations are done repeatedly with a timer. To highlight one of the pie slices at time we modify its exploded property:</p> <pre class="qml"> <span class="name">wheelOfFortune</span>.<span class="name">at</span>(<span class="name">index</span>).<span class="name">exploded</span> <span class="operator">=</span> <span class="number">false</span>; __activeIndex++; <span class="name">index</span> <span class="operator">=</span> <span class="name">__activeIndex</span> <span class="operator">%</span> <span class="name">wheelOfFortune</span>.<span class="name">count</span>; <span class="name">wheelOfFortune</span>.<span class="name">at</span>(<span class="name">index</span>).<span class="name">exploded</span> <span class="operator">=</span> <span class="number">true</span>; </pre> <p>Then an animation using a scatter series with one data point:</p> <pre class="qml"> <span class="name">scatterSeries</span>.<span class="name">clear</span>(); <span class="name">scatterSeries</span>.<span class="name">append</span>(<span class="name">__activeIndex</span>, <span class="name">interval</span>); <span class="name">scatterSeries</span>.<span class="name">color</span> <span class="operator">=</span> <span class="name">Qt</span>.<span class="name">tint</span>(<span class="name">scatterSeries</span>.<span class="name">color</span>, <span class="string">"#05FF0000"</span>); <span class="name">scatterSeries</span>.<span class="name">markerSize</span> <span class="operator">+=</span> <span class="number">0.5</span>; </pre> <p>When the wheel of fortune has stopped, we make the active slice blink by modifying its colors.</p> <pre class="qml"> <span class="comment">// Switch the colors of the slice and the border</span> <span class="name">wheelOfFortune</span>.<span class="name">at</span>(<span class="name">index</span>).<span class="name">borderWidth</span> <span class="operator">=</span> <span class="number">2</span>; <span class="name">switchColor</span> <span class="operator">=</span> <span class="name">wheelOfFortune</span>.<span class="name">at</span>(<span class="name">index</span>).<span class="name">borderColor</span>; <span class="name">wheelOfFortune</span>.<span class="name">at</span>(<span class="name">index</span>).<span class="name">borderColor</span> <span class="operator">=</span> <span class="name">wheelOfFortune</span>.<span class="name">at</span>(<span class="name">index</span>).<span class="name">color</span>; <span class="name">wheelOfFortune</span>.<span class="name">at</span>(<span class="name">index</span>).<span class="name">color</span> <span class="operator">=</span> <span class="name">switchColor</span>; </pre> <p>Files:</p> <ul> <li><a href="qtcharts-qmlcustomizations-qml-qmlcustomizations-main-qml.html">qmlcustomizations/qml/qmlcustomizations/main.qml</a></li> <li><a href="qtcharts-qmlcustomizations-main-cpp.html">qmlcustomizations/main.cpp</a></li> <li><a href="qtcharts-qmlcustomizations-qmlcustomizations-pro.html">qmlcustomizations/qmlcustomizations.pro</a></li> <li><a href="qtcharts-qmlcustomizations-resources-qrc.html">qmlcustomizations/resources.qrc</a></li> </ul> </div> <!-- @@@qmlcustomizations --> </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>