[wip] words group d3 v4

Dots colored by a property named group.

Dots can be dragged like in my Draggable dots block.

forked from mbostock's block: Collision Detection

with code from mbostock's block: Multi-Foci Force Layout

forked from ocarneiro's block: Grouped dots

forked from ocarneiro's block: [dots] 01 - simple group d3 v4

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<meta http-equiv="X-UA-Compatible" content="IE=edge"/>
<title>D3 v4 - force layout</title>
<style>
html, body, #graph {
    width: 900px;
    height: 500px;
}
</style>
</head>

<body>
<div id="graph"></div>
    
<script src="https://d3js.org/d3.v4.min.js"></script>    
<script>
!(function(){
    "use strict"

var width,height
    var chartWidth, chartHeight
    var margin
    var svg = d3.select("#graph").append("svg")
    var chartLayer = svg.append("g").classed("chartLayer", true)
    // escala com 10 cores (category10)
    var color = d3.scaleOrdinal(d3.schemeCategory10);
    var groups = 7;
  
    main();
    
    function main() {
        var range = 10
        var data = {
            nodes:d3.range(0, range)
          					.map(function(d){ return {r:9, group: d%groups}})
        }
        
        setSize()
        drawChart(data)    
    }
    
    function setSize() {
        width = document.querySelector("#graph").clientWidth
        height = document.querySelector("#graph").clientHeight
    
        margin = {top:0, left:0, bottom:0, right:0 }
        
        chartWidth = width - (margin.left+margin.right)
        chartHeight = height - (margin.top+margin.bottom)
        
        svg.attr("width", width).attr("height", height)
        
        chartLayer
            .attr("width", chartWidth)
            .attr("height", chartHeight)
            .attr("transform", "translate("+[margin.left, margin.top]+")")
    }
    
    function drawChart(data) {
        
        var simulation = d3.forceSimulation()
            .force("collide",d3.forceCollide(function(d){return d.r}))
            .force("charge", d3.forceManyBody())
            .force("center", d3.forceCenter(chartWidth / 2, chartHeight / 2))
            .force("y", d3.forceY(0))
            .force("x", d3.forceX(0))
        
        var node = svg.append("g")
            .attr("class", "nodes")
            .selectAll("text")
            .data(data.nodes)
            .enter().append("text")
        		.text("bola")
            .style("font-size", 36)
            .style("font-family", "monospace")
        		.style("fill", "black")
            .call(d3.drag()
                .on("start", dragstarted)
                .on("drag", dragged)
                .on("end", dragended)); 
        
        
        var ticked = function() {
            node
                .attr("x", function(d) { return d.x; })
                .attr("y", function(d) { return d.y; });
        };

simulation.nodes(data.nodes).on("tick", ticked);
        
        function dragstarted(d) {
            if (!d3.event.active) simulation.alphaTarget(0.5).restart();
            d.fx = d.x;
            d.fy = d.y;
        }
        
        function dragged(d) {
            d.fx = d3.event.x;
            d.fy = d3.event.y;
        }
        
        function dragended(d) {
            if (!d3.event.active) simulation.alphaTarget(0);
            d.fx = null;
            d.fy = null;
        } 
                
    }
}());
</script>    
</body>
</html>

https://d3js.org/d3.v4.min.js