<?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 5.12.6</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 5.12</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"><a href="qtcharts-index.html">Qt Charts | Commercial or GPLv3</a></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> <!-- $$$qmlcustomizations-brief --> <p>This application shows you how to customize different visual properties of a <a href="qml-qtcharts-chartview.html">ChartView</a> and series.</p> <!-- @@@qmlcustomizations --> <!-- $$$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"> ChartView { id: chartView anchors.fill: parent title: "Wheel of fortune" legend.visible: false antialiasing: true PieSeries { id: wheelOfFortune horizontalPosition: 0.3 } SplineSeries { id: splineSeries } ScatterSeries { id: scatterSeries } } </pre> <p>The application data is generated in Component.onCompleted of the main rectangle:</p> <pre class="qml"> Component.onCompleted: { __intervalCoefficient = Math.random() + 0.25; for (var i = 0; i < 20; i++) wheelOfFortune.append("", 1); var interval = 1; for (var j = 0; interval < 800; j++) { interval = __intervalCoefficient * j * j; splineSeries.append(j, interval); } chartView.axisX(scatterSeries).max = j; chartView.axisY(scatterSeries).max = 1000; } </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"> wheelOfFortune.at(index).exploded = false; __activeIndex++; index = __activeIndex % wheelOfFortune.count; wheelOfFortune.at(index).exploded = true; </pre> <p>Then an animation using a scatter series with one data point:</p> <pre class="qml"> scatterSeries.clear(); scatterSeries.append(__activeIndex, interval); scatterSeries.color = Qt.tint(scatterSeries.color, "#05FF0000"); scatterSeries.markerSize += 0.5; </pre> <p>When the wheel of fortune has stopped, we make the active slice blink by modifying its colors.</p> <pre class="qml"> // Switch the colors of the slice and the border wheelOfFortune.at(index).borderWidth = 2; switchColor = wheelOfFortune.at(index).borderColor; wheelOfFortune.at(index).borderColor = wheelOfFortune.at(index).color; wheelOfFortune.at(index).color = switchColor; </pre> <p>Files:</p> <ul> <li><a href="qtcharts-qmlcustomizations-main-cpp.html">qmlcustomizations/main.cpp</a></li> <li><a href="qtcharts-qmlcustomizations-qml-qmlcustomizations-main-qml.html">qmlcustomizations/qml/qmlcustomizations/main.qml</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> 2019 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>