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| import _ from 'lodash';
import React from 'react';
import { lucidClassNames } from '../../util/style-helpers';
import { createClass, findTypes, omitProps } from '../../util/component-types';
import Point from '../Point/Point';
import Line from '../Line/Line';
const cx = lucidClassNames.bind('&-Legend');
const POINT_SIZE = 12;
const LINE_WIDTH = 22;
const {
number,
string,
oneOf,
bool,
func,
} = React.PropTypes;
/**
* {"categories": ["visualizations", "chart primitives"]}
*
* Contrary to the other chart primitives, this component is not rendered in
* svg. In order to sanely render horizontal legends, we need to know the width
* of the text elements ahead of rendering time. Since we're using a variable
* width font, the only way I know of to correctly get the width is with the
* DOM function `getComputedTextLength`. Variable widths are much more easy to
* implement outside of svg.
*/
const Legend = createClass({
displayName: 'Legend',
statics: {
HEIGHT: 28, // exposed for consumer convenience
},
propTypes: {
/**
* Appended to the component-specific class names set on the root element.
*/
className: string,
/**
* Determine orientation of the legend.
*/
orient: oneOf(['horizontal', 'vertical']),
/**
* Show the legend borders. Turn this off if you want to put the legend in
* a `ToolTip` for example.
*/
hasBorders: bool,
/**
* Reverse the order of items in the legend.
*/
isReversed: bool,
},
getDefaultProps() {
return {
orient: 'vertical',
hasBorders: true,
isReversed: false,
};
},
components: {
/**
* Renders a `<li>` that describes the data series.
*/
Item: createClass({
displayName: 'Legend.Item',
propsName: 'Item',
propTypes: {
hasPoint: bool,
hasLine: bool,
/**
* Strings should match an existing color class unless they start with a
* '#' for specific colors. E.g.:
*
* - `COLOR_0`
* - `COLOR_GOOD`
* - `'#123abc'`
*/
color: string,
pointKind: number,
onClick: func,
/**
* Class names that are appended to the defaults.
*/
className: string,
},
}),
},
handleItemClick(index, props, event) {
if (!props.onClick) {
return null;
}
props.onClick(index, { props, event });
},
render() {
const {
orient,
className,
hasBorders,
isReversed,
...passThroughs,
} = this.props;
const isHorizontal = orient === 'horizontal';
const isVertical = orient === 'vertical';
const itemProps = _.map(findTypes(this.props, Legend.Item), 'props');
const hasSomeLines = isVertical && _.some(itemProps, ({ hasLine }) => hasLine);
return (
<ul
{...omitProps(passThroughs, Legend)}
className={cx(className, '&', {
'&-is-horizontal': isHorizontal,
'&-is-vertical': isVertical,
'&-has-borders': hasBorders,
'&-is-reversed': isReversed,
})}
>
{_.map(itemProps, ({
hasLine,
hasPoint,
pointKind = 1,
color,
onClick,
children,
className: itemClass,
}, index) => (
<li
key={index}
className={cx(itemClass, '&-Item')}
onClick={_.partial(this.handleItemClick, index, itemProps[index])}
>
{hasPoint || hasLine ?
<svg
className={cx('&-Item-indicator')}
width={hasLine || hasSomeLines ? LINE_WIDTH : POINT_SIZE}
height={POINT_SIZE}
>
{hasPoint ?
<Point
x={hasLine || hasSomeLines ? LINE_WIDTH / 2 : POINT_SIZE / 2}
y={POINT_SIZE / 2}
color={color}
kind={pointKind}
/>
: null}
{hasLine ?
<Line
d={`M0,${POINT_SIZE / 2} L${LINE_WIDTH},${POINT_SIZE / 2}`}
color={color}
/>
: null}
</svg>
: null}
{children}
</li>
))}
</ul>
);
},
});
export default Legend;
|