pie for ccmonster

_.md

[ Launch: pie for ccmonster ] 5826708 by enjalot

config.json

{"description":"pie for ccmonster","endpoint":"","display":"svg","public":true,"require":[],"fileconfigs":{"inlet.js":{"default":true,"vim":false,"emacs":false,"fontSize":12},"_.md":{"default":true,"vim":false,"emacs":false,"fontSize":12},"config.json":{"default":true,"vim":false,"emacs":false,"fontSize":12}},"fullscreen":false,"play":false,"loop":false,"restart":false,"autoinit":true,"pause":true,"loop_type":"period","bv":false,"nclones":15,"clone_opacity":0.4,"duration":3000,"ease":"linear","dt":0.01,"thumbnail":"http://i.imgur.com/GqChgE0.png"}

inlet.js

    var w = tributary.sw,
        h = tributary.sh,
        r = Math.min(w, h) / 2;
    var color = d3.scale.ordinal()
        .range(["#EC0690", "#666769", "#00ACF5"]);
var svg = d3.select("svg");

visits = [{key:"US", value:100}, {key:"Europe", value:200}];
    var vis = d3.select("svg")
        .data([visits])                   //associate our data with the document
        .append("svg:g")                //make a group to hold our pie chart
            .attr("transform", "translate(" + r + "," + r + ")");    //move the center of the pie chart from 0, 0 to radius, radius

    var arc = d3.svg.arc()              //this will create <path> elements for us using arc data
        .outerRadius(r);

    var pie = d3.layout.pie()           //this will create arc data for us given a list of values
        .value(function(d) { return d.value; });    //we must tell it out to access the value of each element in our data array

    var arcs = vis.selectAll("g.slice")     //this selects all <g> elements with class slice (there aren't any yet)
        .data(pie)                          //associate the generated pie data (an array of arcs, each having startAngle, endAngle and value properties) 
        .enter()                            //this will create <g> elements for every "extra" data element that should be associated with a selection. The result is creating a <g> for every object in the data array
            .append("svg:g")                //create a group to hold each slice (we will have a <path> and a <text> element associated with each slice)
                .attr("class", "slice");    //allow us to style things in the slices (like text)

        arcs.append("svg:path")
                .attr("fill", function(d, i) { return color(i); } ) //set the color for each slice to be chosen from the color function defined above
                .attr("d", arc);                                    //this creates the actual SVG path using the associated data (pie) with the arc drawing function

        arcs.append("svg:text")                                     //add a label to each slice
                .attr("transform", function(d) {                    //set the label's origin to the center of the arc
                //we have to make sure to set these before calling arc.centroid
                d.innerRadius = 0;
                d.outerRadius = r;
                return "translate(" + arc.centroid(d) + ")";        //this gives us a pair of coordinates like [50, 50]
            })
            .attr('text-anchor', 'start')
            .text(function(d, i) { return d.value; });

        var legend = svg.append("g")
          .attr("class", "legend")
          .attr("height", 100)
          .attr("width", 100)
          .attr('transform', 'translate(-80, 0)');


          legend.selectAll('rect')
            .data(visits)
            .enter()
            .append("rect")
          .attr("x", w - 65)
            .attr("y", function(d, i){ return i *  30;})
          .attr("width", 20)
          .attr("height", 20)
          .attr("fill", function(d, i) { return color(i); } );

          legend.selectAll('text')
            .data(visits)
            .enter()
            .append("text")
          .attr("x", w - 30)
            .attr("y", function(d, i){ return i *  30 + 16;})
          .text(function(d, i) {
              return d.key; 
          })
          .attr("fill", function(d, i) { return color(i); } );