Arquivo da tag: D3.js

D3js v4 + Vuejs 2 – map zoom, drag points, drag map, get lon x lat

Mapa mundial com zoom scroll, move mapa, adicionar pontos no json e mover, console.log mostrando a latitude e longitude, utilizando D3.js Versão 4 escrita em ES6
Versão com Vuejs v2

HTML + CSS + JS

<!DOCTYPE html>

<head>
    <meta charset="utf-8">
    <script src="https://unpkg.com/vue"></script>
    <script src="https://d3js.org/d3.v4.min.js"></script>
    <style>
        body {
            margin: 0;
            position: fixed;
            top: 0;
            right: 0;
            bottom: 0;
            left: 0;
        }
    </style>
</head>

<body>
    <div id="app">
        <div id="map"></div>
    </div>
    <script>
        const cities = [{ 'code': 'OTT', 'city': 'OTTAWA', 'country': 'CANADA', 'lat': '23.10', 'lon': '120.34' }, { 'code': 'BSB', 'city': 'BRASILIA', 'country': 'BRAZIL', 'lat': '-32.85', 'lon': '133.30' }, { 'code': 'DEL', 'city': 'DELHI', 'country': 'INDIA', 'lat': '4.71', 'lon': '-127.57' }, { 'code': 'CMX', 'city': 'CIDADE DO MÉXICO', 'country': 'MÉXICO', 'lat': '0.42', 'lon': '93.19' }, { 'code': 'SID', 'city': 'SIDNEY', 'country': 'AUSTRALIA', 'lat': '-48.38', 'lon': '-71.71' }, { 'code': 'TOK', 'city': 'TOQUIO', 'country': 'JAPÃO', 'lat': '17.34', 'lon': '-81.73' }, { 'code': 'CCA', 'city': 'CIDADE DO CABO', 'country': 'AFRICA DO SUL', 'lat': '-43.20', 'lon': '-171.97' }, { 'code': 'CMP', 'city': 'CAMPO GRANDE', 'country': 'BRASIL', 'lat': '-36.15', 'lon': '130.72' }, { 'code': 'PAR', 'city': 'PARIS', 'country': 'FRANÇA', 'lat': '22.19', 'lon': '174.27' }, { 'code': 'NOY', 'city': 'NOVA YORK', 'country': 'USA', 'lat': '11.23', 'lon': '112.96' }]

        new Vue({
            el: '#app',
            data: {
                background: 'https://upload.wikimedia.org/wikipedia/commons/8/80/World_map_-_low_resolution.svg',
                width: 960,
                height: 600,
                start_x: null,
                start_y: null,
                projection: null,
                scale: 200,
                svg: null,
                path: null,
                g: null,
                drag_handler: null
            },
            methods: {
                createMap() {
                    this.projection = d3.geoMercator()
                        .center([0, 5])
                        .scale(this.scale)
                        .rotate([-180, 0])
                    this.svg = d3.select('#map').append('svg:svg')
                        .attr('width', this.width)
                        .attr('height', this.height)
                    this.path = d3.geoPath()
                        .projection(this.projection),
                        this.g = this.svg.append('g')
                    this.g.append('image')
                        .attr('xlink:href', this.background)
                        .append('path')
                        .attr('d', this.path)

                    this.request()
                },
                request() {
                    const app = this,
                        circles = this.g.selectAll('circle')
                            .data(cities)
                            .enter()
                            .append('a')
                            .attr('xlink:href', d => `https://www.google.com/search?q=${d.city}`
                            )
                            .append('circle')
                            .attr('cx', d => this.projection([d.lon, d.lat])[0])
                            .attr('cy', d => this.projection([d.lon, d.lat])[1])
                            .attr('r', 5)
                            .style('fill', 'red')

                    this.drag_handler = d3.drag()
                        .on('start', this.drag_start)
                        .on('drag', (d, i, a) => this.drag_drag(d, i, a))

                    this.drag_handler(circles)
                },
                drag_start() {
                    this.start_x = +d3.event.x
                    this.start_y = +d3.event.y
                },
                drag_drag(d, i, a) {
                    console.log(
                        'lon x lat', this.projection.invert([d3.event.x, d3.event.y])
                    )
                    d3.select(a[i])
                        .attr('cx', d.x = d3.event.x).attr('cy', d.y = d3.event.y)
                }
            },
            mounted() {
                this.createMap()
                const zoom = d3.zoom()
                    .scaleExtent([0.1, 1]) //zoom limit
                    .on('zoom', () => {
                        this.g.style('stroke-width', `${1.5 / d3.event.transform.k}px`)
                        this.g.attr('transform', d3.event.transform) // updated for d3 v4
                    })

                this.svg.call(zoom)
                    //.call(zoom.transform, d3.zoomIdentity.translate(200, 20).scale(0.25)) //initial size
                    .append('svg:g')
                    .attr('transform', 'translate(100,50) scale(.5,.5)');
            }
        })
    </script>
</body>
</html>

Demo: https://bl.ocks.org/sistemawebpro/41d81ad70d7355691a61a6f7ac7f83d9

D3js v4 map zoom, drag points, drag map, get lon x lat

Mapa mundial com zoom scroll, move mapa, adicionar pontos no json e mover, console.log mostrando a latitude e longitude, utilizando D3.js Versão 4 escrita em ES6

HTML

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
</head>
<body>
    <script src="https://d3js.org/d3.v4.min.js"></script>
    <script src="script.js"></script>
</body>
</html>

cities.json

[
    {
        "code": "OTT",
        "city": "OTTAWA",
        "country": "CANADA",
        "lat": "23.10",
        "lon": "120.34"
    },
    {
        "code": "BSB",
        "city": "BRASILIA",
        "country": "BRAZIL",
        "lat": "-32.85",
        "lon": "133.30"
    },
    {
        "code": "DEL",
        "city": "DELHI",
        "country": "INDIA",
        "lat": "4.71",
        "lon": "-127.57"
    },
    {
        "code": "CMX",
        "city": "CIDADE DO MÉXICO",
        "country": "MÉXICO",
        "lat": "0.42",
        "lon": "93.19"
    },
    {
        "code": "SID",
        "city": "SIDNEY",
        "country": "AUSTRALIA",
        "lat": "-48.38",
        "lon": "-71.71"
    },
    {
        "code": "TOK",
        "city": "TOQUIO",
        "country": "JAPÃO",
        "lat": "17.34",
        "lon": "-81.73"
    },
    {
        "code": "CCA",
        "city": "CIDADE DO CABO",
        "country": "AFRICA DO SUL",
        "lat": "-43.20",
        "lon": "-171.97"
    },
    {
        "code": "CMP",
        "city": "CAMPO GRANDE",
        "country": "BRASIL",
        "lat": "-36.15",
        "lon": "130.72"
    },
    {
        "code": "PAR",
        "city": "PARIS",
        "country": "FRANÇA",
        "lat": "22.19",
        "lon": "174.27"
    },
    {
        "code": "NOY",
        "city": "NOVA YORK",
        "country": "USA",
        "lat": "11.23",
        "lon": "112.96"
    }
]

script.js Javascript

const width = 960,
    height = 500,
    projection = d3.geoMercator()
        .center([0, 5])
        .scale(200)
        .rotate([-180, 0]),
    svg = d3.select('body').append('svg')
        .attr('width', width)
        .attr('height', height),
    path = d3.geoPath()
        .projection(projection),
    g = svg.append('g')

g.append('image')
    .attr('xlink:href', 'https://upload.wikimedia.org/wikipedia/commons/8/80/World_map_-_low_resolution.svg')
    .append('path')
    .attr('d', path)    

// Carregar cidades | load city
d3.json('cities.json', (error, data) => {
    const circles = g.selectAll('circle')
        .data(data)
        .enter()
        .append('a')
        .attr('xlink:href', d => `https://www.google.com/search?q=${d.city}`
        )
        .append('circle')
        .attr('cx', d => projection([d.lon, d.lat])[0])
        .attr('cy', d => projection([d.lon, d.lat])[1])
        .attr('r', 5)
        .style('fill', 'red'),
        drag_handler = d3.drag()
            .on('start', drag_start)
            .on('drag', drag_drag)

    function drag_start() {
        start_x = +d3.event.x
        start_y = +d3.event.y
    }

    function drag_drag(d) {
        //Get the current scale of the circle 
        //case where we haven't scaled the circle yet
        // get lon x lat
        console.log('lon x lat', projection.invert([d3.event.x, d3.event.y]))

        if (!this.getAttribute('transform'))
            current_scale = 1
        else {
            current_scale_string = this.getAttribute('transform').split(' ')[1]
            current_scale = +current_scale_string.substring(6, current_scale_string.length - 1)
        }
        d3.select(this)
            .attr('cx', d.x = start_x + ((d3.event.x - start_x) / current_scale))
            .attr('cy', d.y = start_y + ((d3.event.y - start_y) / current_scale))
    }

    drag_handler(circles)
})

// zoom and pan
const zoom = d3.zoom()
    .on('zoom', () => {
        g.style('stroke-width', `${1.5 / d3.event.transform.k}px`)
        g.attr('transform', d3.event.transform) // updated for d3 v4
    })

svg.call(zoom)

Demo: https://bl.ocks.org/sistemawebpro/8ef27771795b451d0589e95e5674aa41