<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE html> <html lang="en"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>arc.js Example File | Qt Script</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="qtscript-index.html">Qt Script</a></td><td ><a href="qtscript-script-context2d-example.html">Context2D Example</a></td><td >arc.js Example File</td></tr></table><table class="buildversion"><tr> <td id="buildversion" width="100%" align="right"><a href="qtscript-index.html">Qt 5.12.6 Reference Documentation</a></td> </tr></table> </div> </div> <div class="content"> <div class="line"> <div class="content mainContent"> <div class="sidebar"><div class="sidebar-content" id="sidebar-content"></div></div> <h1 class="title">arc.js Example File</h1> <span class="subtitle">script/context2d/scripts/arc.js</span> <!-- $$$script/context2d/scripts/arc.js-description --> <div class="descr"> <a name="details"></a> <pre class="js"> var canvas = document.getElementById('tutorial'); // Make sure we don't execute when canvas isn't supported if (canvas.getContext){ // use getContext to use the canvas for drawing var ctx = canvas.getContext('2d'); // Draw shapes for (i=0;i<4;i++){ for(j=0;j<3;j++){ ctx.beginPath(); var x = 25+j*50; // x coordinate var y = 25+i*50; // y coordinate var radius = 20; // Arc radius var startAngle = 0; // Starting point on circle var endAngle = Math.PI+(Math.PI*j)/2; // End point on circle var clockwise = i%2==0 ? false : true; // clockwise or anticlockwise ctx.arc(x,y,radius,startAngle,endAngle, clockwise); if (i>1){ ctx.fill(); } else { ctx.stroke(); } } } } </pre> </div> <!-- @@@script/context2d/scripts/arc.js --> </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>