React UI Components
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import React from 'react';import ReactDOM from 'react-dom';import JqxChart from '../../../jqwidgets-react/react_jqxchart.js';class App extends React.Component {
transformPath(path, wScale, hScale, xOffset, yOffset) {
let output = '';
for (let i = 0; i < path.length; i++) {
if (path[i] == 'C' || path[i] == 'M' || path[i] == 'L') {
output += path[i];
i++;
let j = i;
while (j + 1 < path.length && !(path[j + 1] == 'C' || path[j + 1] == 'M' || path[j + 1] == 'L' || path[j + 1] == 'z'))
j++;
let value = path.substring(i, j);
let pointsString = value.split(' ');
for (let s = 0; s < pointsString.length; s++) {
if (pointsString[s].length == 0)
continue;
let pointString = pointsString[s].split(',');
let point = { x: pointString[0], y: pointString[1] };
point.x = point.x * wScale + xOffset;
point.y = point.y * hScale + yOffset;
output += ' ' + point.x + ',' + point.y + ' ';
}
i = j - 1;
}
else {
output += path[i];
}
}
return output;
}
render() {
let source =
{
datatype: 'json',
datafields: [
{ name: 'id' },
{ name: 'path' },
{ name: 'europe' },
{ name: 'eu' }
],
/* EU map definitions in JSON derived from http://commons.wikimedia.org/wiki/File:116_000_map_of_Europe.svg */
url: '../sampledata/europe.txt'
};
let dataAdapter = new $.jqx.dataAdapter(source, { async: false, autoBind: true, loadError: (xhr, status, error) => { alert('Error loading "' + source.url + '" : ' + error); } });
let padding = { left: 10, top: 5, right: 10, bottom: 5 };
let titlePadding = { left: 90, top: 0, right: 0, bottom: 10 };
let drawBefore = (renderer, rect) => {
renderer.rect(rect.x, rect.y, rect.width, rect.height, { fill: 'lightblue' });
};
let draw = (renderer, rect) => {
let records = dataAdapter.records;
let wScale = rect.width / 13000
let hScale = (rect.height) / 8500;
for (let i = 0; i < records.length; i++) {
let path = this.transformPath(records[i].path, wScale, hScale, 62, 22);
let pathElement = renderer.path(path, { stroke: 'black' });
if (records[i].eu == 'true') {
renderer.attr(pathElement, { fill: 'blue' });
}
else
renderer.attr(pathElement, { fill: '#DEDEDE' });
}
};
return (
<JqxChart style={{ width: 850, height: 500 }}
title={'Map of the European Union'} description={''}
padding={padding} titlePadding={titlePadding} source={dataAdapter}
drawBefore={drawBefore} draw={draw}
/>
)
}
}
ReactDOM.render(<App />, document.getElementById('app'));
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