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160 | 1×
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| import d3 from 'd3';
import Geo from '../Geo';
import VisComponent from '../../VisComponent';
import { minmax } from '../../util';
export default class GeoDots extends VisComponent {
static get options () {
return [
{
name: 'data',
type: 'table',
format: 'objectlist'
},
{
name: 'latitude',
type: 'string',
format: 'text',
domain: {
mode: 'field',
from: 'data',
fieldTypes: ['number']
}
},
{
name: 'longitude',
type: 'string',
format: 'text',
domain: {
mode: 'field',
from: 'data',
fieldTypes: ['number']
}
},
{
name: 'color',
type: 'string',
format: 'text',
optional: true,
domain: {
mode: 'field',
from: 'data',
fieldTypes: ['string', 'date', 'number', 'integer', 'boolean']
}
},
{
name: 'size',
type: 'string',
format: 'text',
optional: true,
domain: {
mode: 'field',
from: 'data',
fieldTypes: ['number', 'integer', 'boolean']
}
}
];
}
constructor (el, options) {
super(el);
let width = options.width || 600;
let height = options.height || 600;
el.style.width = width + 'px';
el.style.height = height + 'px';
let sizeTransform = 5;
if (options.size) {
const range = minmax(options.data.map(d => d[options.size]));
const scale = d3.scale.linear()
.domain([range.min, range.max])
.range([3, 19]);
sizeTransform = d => scale(d[options.size]);
}
let fillTransform = 'red';
let strokeTransform = 'darkred';
if (options.color && options.data.length > 0) {
let fillScale, strokeScale;
const type = typeof options.data[0][options.color];
if (type === undefined || type === 'string') {
fillScale = d3.scale.category10();
strokeScale = 'black';
} else {
const range = minmax(options.data.map(d => d[options.color]));
const red = d3.rgb('#ef6a62');
const blue = d3.rgb('#67a9cf');
const darkred = red.darker();
const darkblue = blue.darker();
fillScale = d3.scale.linear()
.domain([range.min, range.max])
.range([red, blue]);
strokeScale = d3.scale.linear()
.domain([range.min, range.max])
.range([darkred, darkblue]);
}
fillTransform = d => fillScale(d[options.color]);
if (strokeScale === 'black') {
strokeTransform = 'black';
} else {
strokeTransform = d => strokeScale(d[options.color]);
}
}
// TODO(choudhury): don't mutate the options object directly.
options.layers = [];
if (options.tileUrl !== null) {
options.layers.push({
type: 'osm',
url: options.tileUrl
});
}
options.layers.push({
type: 'feature',
features: [
{
name: 'feature1',
type: 'point',
x: options.longitude,
y: options.latitude,
style: {
radius: sizeTransform,
fillColor: fillTransform,
strokeColor: strokeTransform
},
data: options.data
}
]
});
options.center = options.center || {};
const center = {
x: options.center.longitude || 0.0,
y: options.center.latitude || 0.0
};
const map_options = Object.assign({
map: {
zoom: options.zoom,
center: center
}
}, options);
this.geojs = new Geo(this.el, map_options);
}
render () {
this.geojs.render();
}
}
|