Demos
PDF(React)
Drawing graphics

Drawing graphics (React)

This sample shows how to draw graphics on a page. Click the 'Export' button to view the exported PDF document.

Learn about Wijmo | Drawing Graphics Documentation | PdfDocument API Reference

This example uses React.

JavaScript
Angular
Vue
React
app.jsx
index.html
app.css
Copy to CodeMine
import 'bootstrap.css';
import '@mescius/wijmo.styles/wijmo.css';
import ReactDOM from 'react-dom/client';
import React, { useRef } from 'react';
import * as pdf from '@mescius/wijmo.pdf';
import * as wijmo from '@mescius/wijmo';
function App() {
    const c1Ref = useRef(new wijmo.Color('#3173c0'));
    const c2Ref = useRef(new wijmo.Color('#e69500'));
    const aRef = useRef(100); // sample area's size.
    const exportPDF = () => {
        let doc = new pdf.PdfDocument({
            header: {
                height: 0
            },
            footer: {
                height: 0
            },
            ended: (sender, args) => pdf.saveBlob(args.blob, 'Document.pdf')
        });
        //
        $_sample1(doc);
        $_sample2(doc);
        $_sample3(doc);
        $_sample4(doc);
        $_sample5(doc);
        //
        doc.end();
    };
    const $_sample1 = (doc) => {
        doc.drawText('Draw a series of lines with different styles: ');
        //
        let y = doc.y + doc.lineHeight(), a = aRef.current, c1 = c1Ref.current;
        //
        // default document's pen (black color)
        doc.paths
            .moveTo(0, y)
            .lineTo(a, y)
            .stroke();
        //
        // color
        doc.paths
            .moveTo(0, y + 20)
            .lineTo(a, y + 20)
            .stroke(c1);
        //
        // color, line width = 3
        doc.paths
            .moveTo(0, y + 40)
            .lineTo(a, y + 40)
            .stroke(new pdf.PdfPen(c1, 3));
        //
        // opacity color, line width = 3
        doc.paths
            .moveTo(0, y + 60)
            .lineTo(a, y + 60)
            .stroke(new pdf.PdfPen(wijmo.Color.fromRgba(c1.r, c1.g, c1.b, 0.2), 3));
        //
        // color, dash pattern, line width = 3
        doc.paths
            .moveTo(0, y + 80)
            .lineTo(a, y + 80)
            .stroke(new pdf.PdfPen(c1, 3, new pdf.PdfDashPattern(5)));
        //
        doc.y = y + a + doc.lineHeight();
    };
    const $_sample2 = (doc) => {
        doc.drawText('Draw a rectangle covered with a filled curved path:');
        //
        let y = doc.y + doc.lineHeight(), a = aRef.current, c1 = c1Ref.current, c2 = c2Ref.current;
        //
        doc.paths
            .rect(0, y, a, a)
            .stroke(c1);
        //
        doc.paths
            .moveTo(0, y)
            .bezierCurveTo(a / 2, y, a / 2, a + y, a, a + y)
            .lineTo(0, a + y)
            .lineTo(0, y)
            .fill(c2);
        //
        doc.y = y + a + doc.lineHeight();
    };
    const $_sample3 = (doc) => {
        doc.drawText('Draw a rectangle, inscribe a circle into it, fill the circle with an opaque color and stroke it using a dashed line:');
        //
        let y = doc.y + doc.lineHeight(), a = aRef.current, c1 = c1Ref.current, c2 = c2Ref.current;
        //
        doc.paths
            .rect(0, y, a, a)
            .fill(c1);
        //
        doc.paths
            .circle(a / 2, y + a / 2, a / 2)
            .fillAndStroke(wijmo.Color.fromRgba(c2.r, c2.g, c2.b, 0.3), new pdf.PdfPen(c2, 2, new pdf.PdfDashPattern(5)));
        //
        doc.y = y + a + doc.lineHeight();
    };
    const $_sample4 = (doc) => {
        doc.drawText('Draw a simple pattern clipped by a circular clipping path:');
        //
        let y = doc.y + doc.lineHeight(), a = aRef.current, c1 = c1Ref.current, c2 = c2Ref.current, a0 = 10;
        //
        doc.saveState();
        //
        // clipping path
        doc.paths
            .circle(a / 2, y + a / 2, a / 2)
            .clip();
        //
        // draw pattern
        for (let i = 0; i < 10; i++) {
            doc.paths
                .rect(0, y + i * a0, a, a0)
                .fill(i % 2 ? c1 : c2);
        }
        //
        doc.restoreState();
        //
        doc.y = y + a + doc.lineHeight();
    };
    const $_sample5 = (doc) => {
        doc.drawText('Draw a series of rectangles and rotate every rectangle by 15 degrees to the previous:');
        //
        let y = doc.y + doc.lineHeight(), sqrt2 = Math.sqrt(2), degrees = 15, samples = 90 / degrees, a = aRef.current, c1 = c1Ref.current, c2 = c2Ref.current;
        //
        doc.saveState();
        //
        for (let i = 0; i < samples; i++) {
            doc
                .rotate(degrees, new wijmo.Point(a / 2, y + a / 2))
                .paths
                // draw rectangle as if it is inscribed into a circle with the radius of a/ 2
                .rect((a - a / sqrt2) / 2, y + ((a - a / sqrt2) / 2), a / sqrt2, a / sqrt2)
                .fill(wijmo.Color.interpolate(c1, c2, i * (1 / (samples - 1))));
        }
        //
        doc.restoreState();
        //
        doc.y = y + a + doc.lineHeight();
    };
    return (<div className="container-fluid">
      {/* Export button */}
      <button className="btn btn-default" onClick={exportPDF}>Export</button>
    </div>);
}
const container = document.getElementById('app');
if (container) {
    const root = ReactDOM.createRoot(container);
    root.render(<App />);
}
import 'bootstrap.css'; import '@mescius/wijmo.styles/wijmo.css'; import ReactDOM from 'react-dom/client'; import React, { useRef } from 'react'; import * as pdf from '@mescius/wijmo.pdf'; import * as wijmo from '@mescius/wijmo'; function App() { const c1Ref = useRef(new wijmo.Color('#3173c0')); const c2Ref = useRef(new wijmo.Color('#e69500')); const aRef = useRef(100); // sample area's size. const exportPDF = () => { let doc = new pdf.PdfDocument({ header: { height: 0 }, footer: { height: 0 }, ended: (sender, args) => pdf.saveBlob(args.blob, 'Document.pdf') }); // $_sample1(doc); $_sample2(doc); $_sample3(doc); $_sample4(doc); $_sample5(doc); // doc.end(); }; const $_sample1 = (doc) => { doc.drawText('Draw a series of lines with different styles: '); // let y = doc.y + doc.lineHeight(), a = aRef.current, c1 = c1Ref.current; // // default document's pen (black color) doc.paths .moveTo(0, y) .lineTo(a, y) .stroke(); // // color doc.paths .moveTo(0, y + 20) .lineTo(a, y + 20) .stroke(c1); // // color, line width = 3 doc.paths .moveTo(0, y + 40) .lineTo(a, y + 40) .stroke(new pdf.PdfPen(c1, 3)); // // opacity color, line width = 3 doc.paths .moveTo(0, y + 60) .lineTo(a, y + 60) .stroke(new pdf.PdfPen(wijmo.Color.fromRgba(c1.r, c1.g, c1.b, 0.2), 3)); // // color, dash pattern, line width = 3 doc.paths .moveTo(0, y + 80) .lineTo(a, y + 80) .stroke(new pdf.PdfPen(c1, 3, new pdf.PdfDashPattern(5))); // doc.y = y + a + doc.lineHeight(); }; const $_sample2 = (doc) => { doc.drawText('Draw a rectangle covered with a filled curved path:'); // let y = doc.y + doc.lineHeight(), a = aRef.current, c1 = c1Ref.current, c2 = c2Ref.current; // doc.paths .rect(0, y, a, a) .stroke(c1); // doc.paths .moveTo(0, y) .bezierCurveTo(a / 2, y, a / 2, a + y, a, a + y) .lineTo(0, a + y) .lineTo(0, y) .fill(c2); // doc.y = y + a + doc.lineHeight(); }; const $_sample3 = (doc) => { doc.drawText('Draw a rectangle, inscribe a circle into it, fill the circle with an opaque color and stroke it using a dashed line:'); // let y = doc.y + doc.lineHeight(), a = aRef.current, c1 = c1Ref.current, c2 = c2Ref.current; // doc.paths .rect(0, y, a, a) .fill(c1); // doc.paths .circle(a / 2, y + a / 2, a / 2) .fillAndStroke(wijmo.Color.fromRgba(c2.r, c2.g, c2.b, 0.3), new pdf.PdfPen(c2, 2, new pdf.PdfDashPattern(5))); // doc.y = y + a + doc.lineHeight(); }; const $_sample4 = (doc) => { doc.drawText('Draw a simple pattern clipped by a circular clipping path:'); // let y = doc.y + doc.lineHeight(), a = aRef.current, c1 = c1Ref.current, c2 = c2Ref.current, a0 = 10; // doc.saveState(); // // clipping path doc.paths .circle(a / 2, y + a / 2, a / 2) .clip(); // // draw pattern for (let i = 0; i < 10; i++) { doc.paths .rect(0, y + i * a0, a, a0) .fill(i % 2 ? c1 : c2); } // doc.restoreState(); // doc.y = y + a + doc.lineHeight(); }; const $_sample5 = (doc) => { doc.drawText('Draw a series of rectangles and rotate every rectangle by 15 degrees to the previous:'); // let y = doc.y + doc.lineHeight(), sqrt2 = Math.sqrt(2), degrees = 15, samples = 90 / degrees, a = aRef.current, c1 = c1Ref.current, c2 = c2Ref.current; // doc.saveState(); // for (let i = 0; i < samples; i++) { doc .rotate(degrees, new wijmo.Point(a / 2, y + a / 2)) .paths // draw rectangle as if it is inscribed into a circle with the radius of a/ 2 .rect((a - a / sqrt2) / 2, y + ((a - a / sqrt2) / 2), a / sqrt2, a / sqrt2) .fill(wijmo.Color.interpolate(c1, c2, i * (1 / (samples - 1)))); } // doc.restoreState(); // doc.y = y + a + doc.lineHeight(); }; return (<div className="container-fluid"> {/* Export button */} <button className="btn btn-default" onClick={exportPDF}>Export</button> </div>); } const container = document.getElementById('app'); if (container) { const root = ReactDOM.createRoot(container); root.render(<App />); }
<!DOCTYPE html> <html lang="en"> <head> <meta charset="utf-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <title>Drawing Graphics</title> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <!-- SystemJS --> <script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.40/system.src.js" integrity="sha512-G6mEj6h18+m3MvzdviSDfPle/TfH0//cXcB33AKlNR/Rha0yQsKefDZKRTkIZos97HEGq2JMV1RT5ybMoQ3WsQ==" crossorigin="anonymous"></script> <script src="systemjs.config.js"></script> <script> System.import('./src/app'); </script> </head> <body> <div id="app"></div> </body> </html>
body { margin-bottom: 24px; }
(function (global) { window.process = { env: { NODE_ENV: "production" } } System.config({ transpiler: 'plugin-babel', babelOptions: { es2015: true, react: 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', '@mescius/wijmo': 'npm:@mescius/wijmo/index.js', '@mescius/wijmo.input': 'npm:@mescius/wijmo.input/index.js', '@mescius/wijmo.styles': 'npm:@mescius/wijmo.styles', '@mescius/wijmo.cultures': 'npm:@mescius/wijmo.cultures', '@mescius/wijmo.chart': 'npm:@mescius/wijmo.chart/index.js', '@mescius/wijmo.chart.analytics': 'npm:@mescius/wijmo.chart.analytics/index.js', '@mescius/wijmo.chart.animation': 'npm:@mescius/wijmo.chart.animation/index.js', '@mescius/wijmo.chart.annotation': 'npm:@mescius/wijmo.chart.annotation/index.js', '@mescius/wijmo.chart.finance': 'npm:@mescius/wijmo.chart.finance/index.js', '@mescius/wijmo.chart.finance.analytics': 'npm:@mescius/wijmo.chart.finance.analytics/index.js', '@mescius/wijmo.chart.hierarchical': 'npm:@mescius/wijmo.chart.hierarchical/index.js', '@mescius/wijmo.chart.interaction': 'npm:@mescius/wijmo.chart.interaction/index.js', '@mescius/wijmo.chart.radar': 'npm:@mescius/wijmo.chart.radar/index.js', '@mescius/wijmo.chart.render': 'npm:@mescius/wijmo.chart.render/index.js', '@mescius/wijmo.chart.webgl': 'npm:@mescius/wijmo.chart.webgl/index.js', '@mescius/wijmo.chart.map': 'npm:@mescius/wijmo.chart.map/index.js', '@mescius/wijmo.gauge': 'npm:@mescius/wijmo.gauge/index.js', '@mescius/wijmo.grid': 'npm:@mescius/wijmo.grid/index.js', '@mescius/wijmo.grid.detail': 'npm:@mescius/wijmo.grid.detail/index.js', '@mescius/wijmo.grid.filter': 'npm:@mescius/wijmo.grid.filter/index.js', '@mescius/wijmo.grid.search': 'npm:@mescius/wijmo.grid.search/index.js', '@mescius/wijmo.grid.style': 'npm:@mescius/wijmo.grid.style/index.js', '@mescius/wijmo.grid.grouppanel': 'npm:@mescius/wijmo.grid.grouppanel/index.js', '@mescius/wijmo.grid.multirow': 'npm:@mescius/wijmo.grid.multirow/index.js', '@mescius/wijmo.grid.transposed': 'npm:@mescius/wijmo.grid.transposed/index.js', '@mescius/wijmo.grid.transposedmultirow': 'npm:@mescius/wijmo.grid.transposedmultirow/index.js', '@mescius/wijmo.grid.pdf': 'npm:@mescius/wijmo.grid.pdf/index.js', '@mescius/wijmo.grid.sheet': 'npm:@mescius/wijmo.grid.sheet/index.js', '@mescius/wijmo.grid.xlsx': 'npm:@mescius/wijmo.grid.xlsx/index.js', '@mescius/wijmo.grid.selector': 'npm:@mescius/wijmo.grid.selector/index.js', '@mescius/wijmo.grid.cellmaker': 'npm:@mescius/wijmo.grid.cellmaker/index.js', '@mescius/wijmo.grid.immutable': 'npm:@mescius/wijmo.grid.immutable/index.js', '@mescius/wijmo.touch': 'npm:@mescius/wijmo.touch/index.js', '@mescius/wijmo.cloud': 'npm:@mescius/wijmo.cloud/index.js', '@mescius/wijmo.nav': 'npm:@mescius/wijmo.nav/index.js', '@mescius/wijmo.odata': 'npm:@mescius/wijmo.odata/index.js', '@mescius/wijmo.olap': 'npm:@mescius/wijmo.olap/index.js', '@mescius/wijmo.rest': 'npm:@mescius/wijmo.rest/index.js', '@mescius/wijmo.pdf': 'npm:@mescius/wijmo.pdf/index.js', '@mescius/wijmo.pdf.security': 'npm:@mescius/wijmo.pdf.security/index.js', '@mescius/wijmo.viewer': 'npm:@mescius/wijmo.viewer/index.js', '@mescius/wijmo.xlsx': 'npm:@mescius/wijmo.xlsx/index.js', '@mescius/wijmo.undo': 'npm:@mescius/wijmo.undo/index.js', '@mescius/wijmo.interop.grid': 'npm:@mescius/wijmo.interop.grid/index.js', '@mescius/wijmo.barcode': 'npm:@mescius/wijmo.barcode/index.js', '@mescius/wijmo.barcode.common': 'npm:@mescius/wijmo.barcode.common/index.js', '@mescius/wijmo.barcode.composite': 'npm:@mescius/wijmo.barcode.composite/index.js', '@mescius/wijmo.barcode.specialized': 'npm:@mescius/wijmo.barcode.specialized/index.js', "@mescius/wijmo.react.chart.analytics": "npm:@mescius/wijmo.react.chart.analytics/index.js", "@mescius/wijmo.react.chart.animation": "npm:@mescius/wijmo.react.chart.animation/index.js", "@mescius/wijmo.react.chart.annotation": "npm:@mescius/wijmo.react.chart.annotation/index.js", "@mescius/wijmo.react.chart.finance.analytics": "npm:@mescius/wijmo.react.chart.finance.analytics/index.js", "@mescius/wijmo.react.chart.finance": "npm:@mescius/wijmo.react.chart.finance/index.js", "@mescius/wijmo.react.chart.hierarchical": "npm:@mescius/wijmo.react.chart.hierarchical/index.js", "@mescius/wijmo.react.chart.interaction": "npm:@mescius/wijmo.react.chart.interaction/index.js", "@mescius/wijmo.react.chart.radar": "npm:@mescius/wijmo.react.chart.radar/index.js", "@mescius/wijmo.react.chart": "npm:@mescius/wijmo.react.chart/index.js", "@mescius/wijmo.react.core": "npm:@mescius/wijmo.react.core/index.js", '@mescius/wijmo.react.chart.map': 'npm:@mescius/wijmo.react.chart.map/index.js', "@mescius/wijmo.react.gauge": "npm:@mescius/wijmo.react.gauge/index.js", "@mescius/wijmo.react.grid.detail": "npm:@mescius/wijmo.react.grid.detail/index.js", "@mescius/wijmo.react.grid.filter": "npm:@mescius/wijmo.react.grid.filter/index.js", "@mescius/wijmo.react.grid.grouppanel": "npm:@mescius/wijmo.react.grid.grouppanel/index.js", '@mescius/wijmo.react.grid.search': 'npm:@mescius/wijmo.react.grid.search/index.js', "@mescius/wijmo.react.grid.multirow": "npm:@mescius/wijmo.react.grid.multirow/index.js", "@mescius/wijmo.react.grid.sheet": "npm:@mescius/wijmo.react.grid.sheet/index.js", '@mescius/wijmo.react.grid.transposed': 'npm:@mescius/wijmo.react.grid.transposed/index.js', '@mescius/wijmo.react.grid.transposedmultirow': 'npm:@mescius/wijmo.react.grid.transposedmultirow/index.js', '@mescius/wijmo.react.grid.immutable': 'npm:@mescius/wijmo.react.grid.immutable/index.js', "@mescius/wijmo.react.grid": "npm:@mescius/wijmo.react.grid/index.js", "@mescius/wijmo.react.input": "npm:@mescius/wijmo.react.input/index.js", "@mescius/wijmo.react.olap": "npm:@mescius/wijmo.react.olap/index.js", "@mescius/wijmo.react.viewer": "npm:@mescius/wijmo.react.viewer/index.js", "@mescius/wijmo.react.nav": "npm:@mescius/wijmo.react.nav/index.js", "@mescius/wijmo.react.base": "npm:@mescius/wijmo.react.base/index.js", '@mescius/wijmo.react.barcode.common': 'npm:@mescius/wijmo.react.barcode.common/index.js', '@mescius/wijmo.react.barcode.composite': 'npm:@mescius/wijmo.react.barcode.composite/index.js', '@mescius/wijmo.react.barcode.specialized': 'npm:@mescius/wijmo.react.barcode.specialized/index.js', 'jszip': 'npm:jszip/dist/jszip.js', 'react': 'npm:react/index.js', 'react-dom': 'npm:react-dom/index.js', 'react-dom/client': 'npm:react-dom/client.js', "scheduler": "npm:scheduler/index.js", 'redux': 'npm:redux/dist/redux.min.js', 'react-redux': 'npm:react-redux/dist/react-redux.min.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', "react-use-event-hook": "npm:react-use-event-hook/dist/esm/useEvent.js", }, // packages tells the System loader how to load when no filename and/or no extension packages: { src: { defaultExtension: 'jsx' }, "node_modules": { defaultExtension: 'js' }, } }); })(this);