ScatterGL

The sample shows a scatter chart with large data which uses high performance WebGL rendering.

import '@grapecity/wijmo.styles/wijmo.css'; import './styles.css'; // import * as wjInput from '@grapecity/wijmo.input'; import * as wjChart from '@grapecity/wijmo.chart'; import { ChartGestures, InteractiveAxes, MouseAction } from '@grapecity/wijmo.chart.interaction'; import { WebGLRenderEngine } from '@grapecity/wijmo.chart.webgl'; import { getData } from './data'; document.readyState === 'complete' ? init() : window.onload = init; function init() { let chart = new wjChart.FlexChart('#theChart', { chartType: 'Scatter', bindingX: 'x', binding: 'y', axisX: { min: -2, max: 2 }, axisY: { min: -2, max: 2, axisLine: true, majorGrid: false }, }); // add interaction let chartGestures = new ChartGestures(chart, { interactiveAxes: InteractiveAxes.XY, mouseAction: MouseAction.Zoom, scaleY: 1, posY: 0.5, scaleX: 1, posX: 0.5 }); // // chart data helper const refreshData = () => { if (nSerMenu && nPtsMenu && symMenu) { const nser = nSerMenu.selectedValue; const npts = nPtsMenu.selectedValue; const marker = symMenu.selectedValue; chart.beginUpdate(); chart.series.length = 0; for (let i = 0; i < nser; i++) { let series = new wjChart.Series(); series.name = `ser ${i + 1}`; series.symbolStyle = { strokeWidth: 0 }; series.symbolMarker = marker; series.itemsSource = getData(Math.random() - 0.5, Math.random() - 0.5, npts / nser, 0.5 * (1 - i / nser)); chart.series.push(series); } chart.endUpdate(); } }; // // menu header helper const updateMenuHeader = (menu, header) => { menu.header = header ? `${header}: <b>${menu.text}</b>` : menu.text; }; // // number of points menu const nPtsMenu = new wjInput.Menu('#nPtsMenu', { itemClicked: (s) => { updateMenuHeader(s, 'NumPoints'); refreshData(); } }); nPtsMenu.onItemClicked(); // // number of series menu let nSerMenu = new wjInput.Menu('#nSerMenu', { itemClicked: (s) => { updateMenuHeader(s, 'NumSeries'); refreshData(); } }); nSerMenu.onItemClicked(); // // series symbol menu let symMenu = new wjInput.Menu('#symbolMenu', { itemClicked: (s) => { // const marker = parseInt(s.selectedValue); const marker = s.selectedValue; chart.series.forEach((ser) => ser.symbolMarker = marker); updateMenuHeader(s, 'Symbol'); } }); symMenu.onItemClicked(); // // serias symbol size menu let symSize = new wjInput.Menu('#symbolSize', { itemClicked: (s) => { chart.symbolSize = parseInt(s.selectedValue); updateMenuHeader(s, 'Size'); } }); symSize.onItemClicked(); // // render engine to use const webjlEl = document.getElementById('webgl'); const webglEng = new WebGLRenderEngine(); const svgEng = new wjChart.SvgRenderEngine(); const updateRenderEngin = () => { chart.renderEngine = webjlEl.checked ? webglEng : svgEng; }; webjlEl.addEventListener('click', updateRenderEngin); updateRenderEngin(); // // refresh data button document.getElementById('btnNew').addEventListener('click', refreshData); // // reset zoom button document.getElementById('btnReset').addEventListener('click', () => chartGestures.reset()); // // initialize data refreshData(); }
<!DOCTYPE html> <html lang="en"> <head> <meta charset="utf-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <title>WebGL</title> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <!-- SystemJS --> <script src="node_modules/systemjs/dist/system.src.js"></script> <script src="systemjs.config.js"></script> <script> System.import('./src/app'); </script> </head> <body> <div class='container-fluid'> <div class="row"> <div class="col-sm-12"> <select id="nPtsMenu"> <option value="1000">1K</option> <option value="10000">10K</option> <option value="100000" selected="selected">100K</option> <option value="200000">200K</option> <option value="500000">500K</option> </select> <select id="nSerMenu"> <option value="1" selected="selected">1</option> <option value="2">2</option> <option value="4">4</option> <option value="8">8</option> </select> <select id="symbolMenu"> <option value="Dot" selected="selected">Dot</option> <option value="Box">Box</option> </select> <select id="symbolSize"> <option value="3" selected="selected">3</option> <option value="5">5</option> <option value="10">10</option> <option value="20">20</option> <option value="50">50</option> </select> <label> Use WebGL <input id="webgl" type="checkbox" checked="checked"> </label> </div> </div> <div class="row"> <div class="col-sm-12"> <div id="theChart"></div> </div> </div> <div class="row"> <div class="col-sm-12"> <button id="btnNew">Refresh Data</button> <button id="btnReset">Reset Zoom</button> </div> </div> </div> </body> </html>
export function getData(cx, cy, n, maxr) { let data = new Array(n); let r0 = 0.1 + maxr; for (let i = 0; i < data.length; i++) { let a = 2 * Math.PI * Math.random(); let r = r0 * Math.sqrt(-2 * Math.log(Math.random())); data[i] = { x: cx + r * Math.cos(a), y: cy + r * Math.sin(a) }; } return data; }
.wj-flexchart { width: 600px; height: 500px; margin: 0; }
(function (global) { System.config({ transpiler: 'plugin-babel', babelOptions: { es2015: true }, meta: { '*.css': { loader: 'css' } }, paths: { // paths serve as alias 'npm:': 'node_modules/' }, // map tells the System loader where to look for things map: { 'jszip': 'npm:jszip/dist/jszip.js', '@grapecity/wijmo': 'npm:@grapecity/wijmo/index.js', '@grapecity/wijmo.input': 'npm:@grapecity/wijmo.input/index.js', '@grapecity/wijmo.styles': 'npm:@grapecity/wijmo.styles', '@grapecity/wijmo.cultures': 'npm:@grapecity/wijmo.cultures', '@grapecity/wijmo.chart': 'npm:@grapecity/wijmo.chart/index.js', '@grapecity/wijmo.chart.analytics': 'npm:@grapecity/wijmo.chart.analytics/index.js', '@grapecity/wijmo.chart.animation': 'npm:@grapecity/wijmo.chart.animation/index.js', '@grapecity/wijmo.chart.annotation': 'npm:@grapecity/wijmo.chart.annotation/index.js', '@grapecity/wijmo.chart.finance': 'npm:@grapecity/wijmo.chart.finance/index.js', '@grapecity/wijmo.chart.finance.analytics': 'npm:@grapecity/wijmo.chart.finance.analytics/index.js', '@grapecity/wijmo.chart.hierarchical': 'npm:@grapecity/wijmo.chart.hierarchical/index.js', '@grapecity/wijmo.chart.interaction': 'npm:@grapecity/wijmo.chart.interaction/index.js', '@grapecity/wijmo.chart.radar': 'npm:@grapecity/wijmo.chart.radar/index.js', '@grapecity/wijmo.chart.render': 'npm:@grapecity/wijmo.chart.render/index.js', '@grapecity/wijmo.chart.webgl': 'npm:@grapecity/wijmo.chart.webgl/index.js', '@grapecity/wijmo.gauge': 'npm:@grapecity/wijmo.gauge/index.js', '@grapecity/wijmo.grid': 'npm:@grapecity/wijmo.grid/index.js', '@grapecity/wijmo.grid.detail': 'npm:@grapecity/wijmo.grid.detail/index.js', '@grapecity/wijmo.grid.filter': 'npm:@grapecity/wijmo.grid.filter/index.js', '@grapecity/wijmo.grid.search': 'npm:@grapecity/wijmo.grid.search/index.js', '@grapecity/wijmo.grid.grouppanel': 'npm:@grapecity/wijmo.grid.grouppanel/index.js', '@grapecity/wijmo.grid.multirow': 'npm:@grapecity/wijmo.grid.multirow/index.js', '@grapecity/wijmo.grid.transposed': 'npm:@grapecity/wijmo.grid.transposed/index.js', '@grapecity/wijmo.grid.transposedmultirow': 'npm:@grapecity/wijmo.grid.transposedmultirow/index.js', '@grapecity/wijmo.grid.pdf': 'npm:@grapecity/wijmo.grid.pdf/index.js', '@grapecity/wijmo.grid.sheet': 'npm:@grapecity/wijmo.grid.sheet/index.js', '@grapecity/wijmo.grid.xlsx': 'npm:@grapecity/wijmo.grid.xlsx/index.js', '@grapecity/wijmo.grid.selector': 'npm:@grapecity/wijmo.grid.selector/index.js', '@grapecity/wijmo.grid.cellmaker': 'npm:@grapecity/wijmo.grid.cellmaker/index.js', '@grapecity/wijmo.nav': 'npm:@grapecity/wijmo.nav/index.js', '@grapecity/wijmo.odata': 'npm:@grapecity/wijmo.odata/index.js', '@grapecity/wijmo.olap': 'npm:@grapecity/wijmo.olap/index.js', '@grapecity/wijmo.pdf': 'npm:@grapecity/wijmo.pdf/index.js', '@grapecity/wijmo.pdf.security': 'npm:@grapecity/wijmo.pdf.security/index.js', '@grapecity/wijmo.viewer': 'npm:@grapecity/wijmo.viewer/index.js', '@grapecity/wijmo.xlsx': 'npm:@grapecity/wijmo.xlsx/index.js', '@grapecity/wijmo.undo': 'npm:@grapecity/wijmo.undo/index.js', '@grapecity/wijmo.interop.grid': 'npm:@grapecity/wijmo.interop.grid/index.js', '@grapecity/wijmo.touch': 'npm:@grapecity/wijmo.touch/index.js', '@grapecity/wijmo.cloud': 'npm:@grapecity/wijmo.cloud/index.js', '@grapecity/wijmo.barcode': 'npm:@grapecity/wijmo.barcode/index.js', '@grapecity/wijmo.barcode.common': 'npm:@grapecity/wijmo.barcode.common/index.js', '@grapecity/wijmo.barcode.composite': 'npm:@grapecity/wijmo.barcode.composite/index.js', '@grapecity/wijmo.barcode.specialized': 'npm:@grapecity/wijmo.barcode.specialized/index.js', 'jszip': 'npm:jszip/dist/jszip.js', 'bootstrap.css': 'npm:bootstrap/dist/css/bootstrap.min.css', 'css': 'npm:systemjs-plugin-css/css.js', 'plugin-babel': 'npm:systemjs-plugin-babel/plugin-babel.js', 'systemjs-babel-build':'npm:systemjs-plugin-babel/systemjs-babel-browser.js' }, // packages tells the System loader how to load when no filename and/or no extension packages: { src: { defaultExtension: 'js' }, "node_modules": { defaultExtension: 'js' }, } }); })(this);