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| import _ from 'lodash';
import React from 'react';
import { lucidClassNames } from '../../util/style-helpers';
import { createClass, omitProps } from '../../util/component-types';
import { groupByFields } from '../../util/chart-helpers';
import * as d3Shape from 'd3-shape';
import * as chartConstants from '../../constants/charts';
import Line from '../Line/Line';
const cx = lucidClassNames.bind('&-Lines');
const {
arrayOf,
func,
number,
object,
bool,
string,
} = React.PropTypes;
/**
* {"categories": ["visualizations", "chart primitives"], "madeFrom": ["Line"]}
*
* *For use within an `svg`*
*
* Lines are typically used to represent continuous data and can be stacked.
*/
const Lines = createClass({
displayName: 'Lines',
propTypes: {
/**
* Appended to the component-specific class names set on the root element.
*/
className: string,
/**
* Top
*/
top: number,
/**
* Left
*/
left: number,
/**
* Takes one of the palettes exported from `lucid.chartConstants`.
* Available palettes:
*
* - `PALETTE_6` (default)
* - `PALETTE_30`
* - `PALETTE_MONOCHROME_0_5`
* - `PALETTE_MONOCHROME_1_5`
* - `PALETTE_MONOCHROME_2_5`
* - `PALETTE_MONOCHROME_3_5`
* - `PALETTE_MONOCHROME_4_5`
* - `PALETTE_MONOCHROME_5_5`
*
*/
palette: arrayOf(string),
/**
* You can pass in an object if you want to map fields to
* `lucid.chartConstants` or custom colors:
*
* {
* 'imps': COLOR_0,
* 'rev': COLOR_3,
* 'clicks': '#abc123',
* }
*/
colorMap: object,
/**
* De-normalized data, e.g.
*
*
* [
* { x: 'one' , y: 1 },
* { x: 'two' , y: 2 },
* { x: 'three' , y: 2 },
* { x: 'four' , y: 3 },
* { x: 'five' , y: 4 },
* ]
*
*
* Or (be sure to set `yFields` to `['y0', 'y1', 'y2', 'y3']`)
*
* [
* { x: 'one' , y0: 1 , y1: 2 , y2: 3 , y3: 5 },
* { x: 'two' , y0: 2 , y1: 3 , y2: 4 , y3: 6 },
* { x: 'three' , y0: 2 , y1: 4 , y2: 5 , y3: 6 },
* { x: 'four' , y0: 3 , y1: 6 , y2: 7 , y3: 7 },
* { x: 'five' , y0: 4 , y1: 8 , y2: 9 , y3: 8 },
* { x: 'six' , y0: 20 , y1: 8 , y2: 9 , y3: 1 },
* ]
*
*/
data: arrayOf(object).isRequired,
/**
* The scale for the x axis. Must be a d3 scale. Lucid exposes the
* `lucid.d3Scale` library for use here.
*/
xScale: func.isRequired,
/**
* The scale for the y axis. Must be a d3 scale. Lucid exposes the
* `lucid.d3Scale` library for use here.
*/
yScale: func.isRequired,
/**
* Typically this number can be derived from the yScale. However when we're
* `isStacked` we need to calculate a new domain for the yScale based on
* the sum of the data. If you need explicit control of the y max when
* stacking, pass it in here.
*/
yStackedMax: number,
/**
* The field we should look up your x data by.
*/
xField: string,
/**
* The field(s) we should look up your y data by. Each entry represents a
* series. Your actual y data should be numeric.
*/
yFields: arrayOf(string),
/**
* This will stack the data instead of grouping it. In order to stack the
* data we have to calculate a new domain for the y scale that is based on
* the `sum` of the data.
*/
isStacked: bool,
/**
* Sometimes you might not want the colors to start rotating at the blue
* color, this number will be added the line index in determining which
* color the lines are.
*/
colorOffset: number,
},
getDefaultProps() {
return {
xField: 'x',
yFields: ['y'],
isStacked: false,
colorOffset: 0,
palette: chartConstants.PALETTE_6,
};
},
render() {
const {
className,
data,
isStacked,
palette,
colorMap,
colorOffset,
xScale,
xField,
yFields,
yScale: yScaleOriginal,
yStackedMax,
...passThroughs,
} = this.props;
// Copy the original so we can mutate it
const yScale = yScaleOriginal.copy();
// If we are stacked, we need to calculate a new domain based on the sum of
// the various series' y data. One row per series.
const transformedData = isStacked
? d3Shape.stack().keys(yFields)(data)
: groupByFields(data, yFields);
const area = isStacked
? d3Shape.area()
.defined((a) => _.isFinite(a[0]) && _.isFinite(a[1]))
.x((a, i) => xScale(data[i][xField]))
.y0((a) => yScale(a[1]))
.y1((a) => yScale(a[0]))
: d3Shape.area()
.defined((a) => _.isFinite(a) || _.isDate(a))
.x((a, i) => xScale(data[i][xField]))
.y((a) => yScale(a));
// If we are stacked, we need to calculate a new domain based on the sum of
// the various group's y data
if (isStacked) {
yScale.domain([
yScale.domain()[0], // only stacks well if this is `0`
yStackedMax || _.chain(transformedData).last().flatten().max().value(),
]);
}
return (
<g
{...omitProps(passThroughs, Lines)}
className={cx(className, '&')}
>
{_.map(transformedData, (d, dIndex) => (
<g key={dIndex}>
<Line
color={_.get(colorMap, yFields[dIndex], palette[(dIndex + colorOffset) % palette.length])}
d={area(d)}
/>
</g>
))}
</g>
);
},
});
export default Lines;
|