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import { action, computed, IReactionDisposer, observable, reaction } from 'mobx';
import { observer } from 'mobx-react';
import * as React from 'react';
import { ChartData, DataPoint } from './ChartBox';
// import d3
import * as d3 from 'd3';
import { minMaxRange, createLineGenerator, xGrid, yGrid, drawLine, xAxisCreator, yAxisCreator, scaleCreatorNumerical, scaleCreatorCategorical } from './utils/D3Utils';
interface LineChartProps {
data: ChartData;
width: number;
height: number;
}
interface SelectedDataPoint {
x: number;
y: number;
elem: d3.Selection<d3.BaseType, unknown, SVGGElement, unknown>;
}
@observer
export class LineChart extends React.Component<LineChartProps> {
private _dataReactionDisposer: IReactionDisposer | undefined = undefined;
@observable private _x: number = 0;
@observable private _y: number = 0;
@observable private _currSelected: SelectedDataPoint | undefined = undefined;
// create ref for the div
private _chartRef: React.RefObject<HTMLDivElement> = React.createRef();
componentDidMount() {
console.log('Getting to line chart');
this.drawChart();
this._dataReactionDisposer = reaction(() => this.props.data, this.drawChart);
}
componentWillUnmount() {
if (this._dataReactionDisposer) {
this._dataReactionDisposer();
}
}
tooltipContent(data: DataPoint) {
return `<b>x: ${data.x} y: ${data.y}</b>`;
}
drawChart() {
// clearing tooltip
d3.select(this._chartRef.current).select('svg').remove();
d3.select(this._chartRef.current).select('.tooltip').remove();
const margin = { top: 50, right: 50, bottom: 50, left: 50 };
const { data } = this.props;
const { xMin, xMax, yMin, yMax } = minMaxRange(data.data);
// adding svg
const svg = d3.select(this._chartRef.current).append('svg').attr('width', '100%').attr('height', '100%').append('g').attr('transform', `translate(${margin.left}, ${margin.top})`);
// adding tooltip
// const tooltip = d3.select('#chart-container').append('div').attr('class', 'tooltip');
if (!xMin || !xMax || !yMin || !yMax) {
// TODO: nda - error handle
return;
}
const xScale = scaleCreatorNumerical(xMin, xMax, 0, this.props.width);
// adding x axis
const yScale = scaleCreatorNumerical(0, yMax, this.props.height, 0);
// create a line function that takes in the data.data.x and data.data.y
// TODO: nda - fix the types for the d here
const lineGen = createLineGenerator(xScale, yScale);
// create x and y grids
xGrid(svg.append('g'), this.props.height, xScale);
yGrid(svg.append('g'), this.props.width, yScale);
xAxisCreator(svg.append('g'), this.props.height, xScale);
yAxisCreator(svg.append('g'), this.props.width, yScale);
// draw the line
drawLine(svg.append('path'), data.data, lineGen);
// draw the datapoint circles
svg.selectAll('.circle-d1')
.data(data.data)
.join('circle') // enter append
.attr('class', 'circle-d1')
.attr('r', '3') // radius
.attr('cx', d => xScale(d.x))
.attr('cy', d => yScale(d.y))
.attr('data-x', d => d.x)
.attr('data-y', d => d.y);
// this.setupDatapointClickHandlers();
const focus = svg.append('g').attr('class', 'focus').style('display', 'none');
focus.append('circle').attr('r', 5).attr('class', 'circle');
const tooltip = d3
.select(this._chartRef.current)
.append('div')
.attr('class', 'tooltip')
.style('opacity', 0)
.style('position', 'absolute')
// .style('z-index', '10')
.style('background', '#fff')
.style('border', '1px solid #ccc')
.style('padding', '5px')
.style('font-size', '12px');
// add all the tooltipContent to the tooltip
// @action
const mousemove = action((e: any) => {
const bisect = d3.bisector((d: DataPoint) => d.x).left;
const xPos = d3.pointer(e)[0];
const x0 = bisect(data.data, xScale.invert(xPos));
const d0 = data.data[x0];
this._x = d0.x;
this._y = d0.y;
focus.attr('transform', `translate(${xScale(d0.x)},${yScale(d0.y)})`);
// TODO: nda - implement tooltips
// tooltip.transition().duration(300).style('opacity', 0.9);
// tooltip.html(() => this.tooltipContent(d0)).attr('transform', `translate(${xScale(d0.x) + 30}px,${yScale(d0.y) + 30}px)`);
});
const onPointClick = action((e: any) => {
const bisect = d3.bisector((d: DataPoint) => d.x).left;
const xPos = d3.pointer(e)[0];
const x0 = bisect(data.data, xScale.invert(xPos));
const d0 = data.data[x0];
this._x = d0.x;
this._y = d0.y;
// find .circle-d1 with data-x = d0.x and data-y = d0.y
const selected = svg.selectAll('.circle-d1').filter((d: any) => d['data-x'] === d0.x && d['data-y'] === d0.y);
this._currSelected = { x: d0.x, y: d0.y, elem: selected };
console.log('Getting here');
console.log(this._currSelected);
});
svg.append('rect')
.attr('class', 'overlay')
.attr('width', this.props.width)
.attr('height', this.props.height)
.style('opacity', 0)
.on('mouseover', () => {
focus.style('display', null);
})
.on('mouseout', () => {
tooltip.transition().duration(300).style('opacity', 0);
})
.on('mousemove', mousemove)
.on('click', onPointClick);
}
render() {
return (
<div ref={this._chartRef} className="chart-container">
<span>
x: {this._x} y: {this._y}
Curr Selected: {this._currSelected ? `x: ${this._currSelected.x} y: ${this._currSelected.y}` : 'none'}
</span>
</div>
);
}
}
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