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172 | 1×
1×
1×
1×
1×
| import d3 from 'd3';
import './country_map.css';
import { colorScalerFactory } from '../modules/colors';
function countryMapChart(slice, payload) {
// CONSTANTS
const fd = payload.form_data;
let path;
let g;
let bigText;
let resultText;
const container = slice.container;
const data = payload.data;
const format = d3.format(fd.number_format);
const colorScaler = colorScalerFactory(fd.linear_color_scheme, data, v => v.metric);
const colorMap = {};
data.forEach((d) => {
colorMap[d.country_id] = colorScaler(d.metric);
});
const colorFn = d => colorMap[d.properties.ISO] || 'none';
let centered;
path = d3.geo.path();
d3.select(slice.selector).selectAll('*').remove();
const div = d3.select(slice.selector)
.append('svg:svg')
.attr('width', slice.width())
.attr('height', slice.height())
.attr('preserveAspectRatio', 'xMidYMid meet');
container.css('height', slice.height());
container.css('width', slice.width());
const clicked = function (d) {
let x;
let y;
let k;
let bigTextX;
let bigTextY;
let bigTextSize;
let resultTextX;
let resultTextY;
if (d && centered !== d) {
const centroid = path.centroid(d);
x = centroid[0];
y = centroid[1];
bigTextX = centroid[0];
bigTextY = centroid[1] - 40;
resultTextX = centroid[0];
resultTextY = centroid[1] - 40;
bigTextSize = '6px';
k = 4;
centered = d;
} else {
x = slice.width() / 2;
y = slice.height() / 2;
bigTextX = 0;
bigTextY = 0;
resultTextX = 0;
resultTextY = 0;
bigTextSize = '30px';
k = 1;
centered = null;
}
g.transition()
.duration(750)
.attr('transform', 'translate(' + slice.width() / 2 + ',' + slice.height() / 2 + ')scale(' + k + ')translate(' + -x + ',' + -y + ')');
bigText.transition()
.duration(750)
.attr('transform', 'translate(0,0)translate(' + bigTextX + ',' + bigTextY + ')')
.style('font-size', bigTextSize);
resultText.transition()
.duration(750)
.attr('transform', 'translate(0,0)translate(' + resultTextX + ',' + resultTextY + ')');
};
const selectAndDisplayNameOfRegion = function (feature) {
let name = '';
if (feature && feature.properties) {
if (feature.properties.ID_2) {
name = feature.properties.NAME_2;
} else {
name = feature.properties.NAME_1;
}
}
bigText.text(name);
};
const updateMetrics = function (region) {
if (region.length > 0) {
resultText.text(format(region[0].metric));
}
};
const mouseenter = function (d) {
// Darken color
let c = colorFn(d);
if (c !== 'none') {
c = d3.rgb(c).darker().toString();
}
d3.select(this).style('fill', c);
selectAndDisplayNameOfRegion(d);
const result = data.filter(region => region.country_id === d.properties.ISO);
updateMetrics(result);
};
const mouseout = function () {
d3.select(this).style('fill', colorFn);
bigText.text('');
resultText.text('');
};
div.append('rect')
.attr('class', 'background')
.attr('width', slice.width())
.attr('height', slice.height())
.on('click', clicked);
g = div.append('g');
const mapLayer = g.append('g')
.classed('map-layer', true);
bigText = g.append('text')
.classed('big-text', true)
.attr('x', 20)
.attr('y', 45);
resultText = g.append('text')
.classed('result-text', true)
.attr('x', 20)
.attr('y', 60);
const url = `/static/assets/src/visualizations/countries/${fd.select_country.toLowerCase()}.geojson`;
d3.json(url, function (error, mapData) {
const features = mapData.features;
const center = d3.geo.centroid(mapData);
let scale = 150;
let offset = [slice.width() / 2, slice.height() / 2];
let projection = d3.geo.mercator().scale(scale).center(center)
.translate(offset);
path = path.projection(projection);
const bounds = path.bounds(mapData);
const hscale = scale * slice.width() / (bounds[1][0] - bounds[0][0]);
const vscale = scale * slice.height() / (bounds[1][1] - bounds[0][1]);
scale = (hscale < vscale) ? hscale : vscale;
const offsetWidth = slice.width() - (bounds[0][0] + bounds[1][0]) / 2;
const offsetHeigth = slice.height() - (bounds[0][1] + bounds[1][1]) / 2;
offset = [offsetWidth, offsetHeigth];
projection = d3.geo.mercator().center(center).scale(scale).translate(offset);
path = path.projection(projection);
// Draw each province as a path
mapLayer.selectAll('path')
.data(features)
.enter().append('path')
.attr('d', path)
.attr('class', 'region')
.attr('vector-effect', 'non-scaling-stroke')
.style('fill', colorFn)
.on('mouseenter', mouseenter)
.on('mouseout', mouseout)
.on('click', clicked);
});
container.show();
}
module.exports = countryMapChart;
|