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react-chartjs-2 horizontall scrollable with fixed y-axis
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import React, { Component } from 'react'; | |
import { Line } from 'react-chartjs-2'; | |
export default class ChartComponent extends Component { | |
getOptions = () => { | |
var itself = this; | |
return { | |
maintainAspectRatio: false, | |
responsive: true, | |
elements: { | |
line: { | |
fill: false | |
} | |
}, | |
scales: { | |
'x-axis-1' : { | |
display: true, | |
grid: { | |
display: false, | |
}, | |
ticks:{ | |
display: true, | |
} | |
}, | |
'y-axis-1' : { | |
display: true, | |
grid: { | |
display: true, | |
}, | |
ticks:{ | |
display: true, | |
} | |
} | |
}, | |
plugins: { | |
tooltip: { | |
mode: 'point', | |
callbacks: { | |
afterLabel: (context) => { | |
// some customization here | |
} | |
} | |
}, | |
legend: { | |
display: this.props.showLegend ? this.props.showLegend : false, | |
position: 'top', | |
labels: { | |
usePointStyle: true, | |
} | |
}, | |
}, | |
"animation": { | |
"duration": 1, | |
"onComplete": function() { | |
var scale = window.devicePixelRatio; | |
var sourceCanvas = this.ctx.canvas; | |
var copyWidth = this.scales['y-axis-1'].width - 7; | |
var copyHeight = this.scales['x-axis-1'].top + 10; | |
if (itself.refs.ticksWrp && (copyWidth > 0) && (copyHeight > 0)) { | |
var targetCtx = itself.refs.ticksWrp.getContext("2d"); | |
if (targetCtx && sourceCanvas) { | |
targetCtx.scale(scale, scale); | |
targetCtx.canvas.width = copyWidth * scale; | |
targetCtx.canvas.height = copyHeight * scale; | |
targetCtx.canvas.style.width = `${copyWidth}px`; | |
targetCtx.canvas.style.height = `${copyHeight}px`; | |
targetCtx.drawImage(sourceCanvas, 0, 0, copyWidth * scale, copyHeight * scale, 0, 0, copyWidth * scale, copyHeight * scale); | |
if (itself.refs.chartWrp) | |
itself.refs.chartWrp.scrollLeft = itself.refs.chartWrp.scrollWidth; // scroll to the right | |
} | |
} | |
} | |
} | |
}; | |
} | |
render() { | |
let { data } = this.props; | |
var options = this.getOptions(); | |
var width = data.datasets[0].data.length < 7 ? '100%' : (data.datasets[0].data.length*50).toString() + 'px'; | |
var height = mode === 'monthly' ? '200px' : '300px'; | |
return (<div className="chart-wrp"> | |
<div className="chart-overflow-wrp" ref="chartWrp"> | |
<div className="main-chart-wrp" style={{width: width}}> | |
<Line data={data} options={options} height={height}/> | |
</div> | |
</div> | |
<canvas ref="ticksWrp" className="custom-y-ticks" height={height} width="0"></canvas> | |
</div>); | |
} | |
} |
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.chart-wrp { | |
position: relative; | |
.chart-overflow-wrp { | |
width: 100%; | |
overflow-x: auto; | |
overflow-y: hidden; | |
} | |
.custom-y-ticks { | |
position: absolute; | |
left: 0; | |
top: 0; | |
pointer-events: none; | |
background-color: #fff; | |
} | |
} |
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