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doughnut_chart.tsx
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doughnut_chart.tsx
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// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
// See LICENSE.txt for license information.
/* eslint-disable react/no-string-refs */
import React from 'react';
import ReactDOM from 'react-dom';
import {FormattedMessage} from 'react-intl';
import Chart, {ChartData} from 'chart.js';
import * as Utils from 'utils/utils.jsx';
type Props = {
title: React.ReactNode;
width: number;
height: number;
data?: ChartData;
}
export default class DoughnutChart extends React.PureComponent<Props> {
public chart: Chart | null = null;
public componentDidMount(): void {
this.initChart();
}
public componentDidUpdate(prevProps: Props): void {
if (!Utils.areObjectsEqual(prevProps.data, this.props.data)) {
this.initChart(true);
}
}
public componentWillUnmount(): void {
if (this.chart && this.refs.canvas) {
this.chart.destroy();
}
}
public initChart = (update?: boolean): void => {
if (!this.refs.canvas) {
return;
}
const el = ReactDOM.findDOMNode(this.refs.canvas) as HTMLCanvasElement;
const ctx = el.getContext('2d') as CanvasRenderingContext2D;
const dataCopy = JSON.parse(JSON.stringify(this.props.data));
this.chart = new Chart(ctx, {type: 'doughnut', data: dataCopy, options: {}});
if (update && this.chart) {
this.chart.update();
}
}
public render(): JSX.Element {
let content;
if (this.props.data == null) {
content = (
<FormattedMessage
id='analytics.chart.loading'
defaultMessage='Loading...'
/>
);
} else {
content = (
<canvas
ref='canvas'
width={this.props.width}
height={this.props.height}
/>
);
}
return (
<div className='col-sm-6'>
<div className='total-count'>
<div className='title'>
{this.props.title}
</div>
<div className='content'>
{content}
</div>
</div>
</div>
);
}
}
/* eslint-enable react/no-string-refs */