D3 Examples - Trump Banned Countries

Trump Banned Countries
Stacked bars showing estimated religion breakdown and population of the 7 countries from which Donald Trump banned immigration to the US. The 7 countries are Iraq, Syria, Iran, Libya, Somalia, Sudan and Yemen.
Data is from The Global Religious Landscape by Pew Research (2010), generated using this processing script. Note that the data is ESTIMATION ONLY, and is from 2010. Also, countries for which values are noted as "< 10000" are transformed to be "0".
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<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8">
    <title>D3 Example</title>
    <script src="//cdnjs.cloudflare.com/ajax/libs/d3/3.5.5/d3.min.js"></script>
    <script src="//cdnjs.cloudflare.com/ajax/libs/d3-legend/1.1.0/d3-legend.js"></script>
    <script src="//cdnjs.cloudflare.com/ajax/libs/d3-tip/0.6.3/d3-tip.min.js"></script>
    <link href='https://fonts.googleapis.com/css?family=Open+Sans' rel='stylesheet' type='text/css'>
    <style>
    
      .axis text {
        font-family: 'Open Sans', sans-serif;
        font-size: 13pt;
      }
      .axis .label {
        font-size: 20pt;
      }
​
      .axis path, .axis line {
        fill: none;
        stroke: #000;
        shape-rendering: crispEdges;
      }
​
      .color-legend text {
        font-family: 'Open Sans', sans-serif;
        font-size: 19pt;
      }
      
      .d3-tip {
        font-family: 'Open Sans', sans-serif;
        font-size: 19pt;
        line-height: 1;
        padding: 7px;
        background: black;
        color: lightgray;
        border-radius: 20px;
      }
      
    </style>
  </head>
  <body>
    <script>
      var outerWidth = 960;
      var outerHeight = 500;
      var margin = { left: 123, top: 40, right: 30, bottom: 47 };
      var barPadding = 0.2;
​
      var xColumn = "population";
      var yColumn = "country";
      var colorColumn = "religion";
      var layerColumn = colorColumn;
      
      var hoveredColorValue;
      var hoveredStrokeColor = "black";
​
      var innerWidth  = outerWidth  - margin.left - margin.right;
      var innerHeight = outerHeight - margin.top  - margin.bottom;
​
      var svg = d3.select("body").append("svg")
        .attr("width",  outerWidth)
        .attr("height", outerHeight);
      var g = svg.append("g")
        .attr("transform", "translate(" + margin.left + "," + margin.top + ")");
      
      // This is the layer where the bars are drawn.
      var baseBarLayer = g.append("g");
      
      // This layer contains a semi-transparent overlay
      // that fades out the base bars.
      var overlayRect = g.append("g")
        .append("rect")
        .attr("width", innerWidth)
        .attr("height", innerHeight)
        .attr("fill", "none")
        .style("pointer-events", "none");
      
      // This contains the subset of bars rendered on top
      // when you hover over the entries in the color legend.
      var foregroundBarLayer = g.append("g");
      
      var xAxisG = g.append("g")
        .attr("class", "x axis")
        .attr("transform", "translate(0," + innerHeight + ")");
      var yAxisG = g.append("g")
        .attr("class", "y axis");
      var colorLegendG = g.append("g")
        .attr("class", "color-legend")
        .attr("transform", "translate(596, 0)");
​
      var xScale = d3.scale.linear().range([0, innerWidth]);
      var yScale = d3.scale.ordinal().rangeBands([innerHeight, 0], barPadding);
      var colorScale = d3.scale.category10();
      
      var tipNumberFormat = d3.format(",");
      var tip = d3.tip()
        .attr("class", "d3-tip")
        .offset([-10, 0])
        .html(function(d) {
          return [
            d[colorColumn],
            " in ",
            d[yColumn],
            ": ",
            tipNumberFormat(d[xColumn])
          ].join("");
        });
      g.call(tip);
      
      // Use a modified SI formatter that uses "B" for Billion.
      var siFormat = d3.format("s");
      var customTickFormat = function (d){
        return siFormat(d).replace("G", "B");
      };
​
      var xAxis = d3.svg.axis().scale(xScale).orient("bottom")
        .ticks(5)
        .tickFormat(customTickFormat)
        .outerTickSize(0);
      var yAxis = d3.svg.axis().scale(yScale).orient("left")
        .outerTickSize(0);
​
      var colorLegend = d3.legend.color()
        .scale(colorScale)
        .shapePadding(6.24)
        .shapeWidth(25)
        .shapeHeight(25)
        .labelOffset(5);
​
      function render(data){
​
        var nested = d3.nest()
          .key(function (d){ return d[layerColumn]; })
          .entries(data);
​
        var stack = d3.layout.stack()
          .y(function (d){ return d[xColumn]; })
          .values(function (d){ return d.values; });
​
        var layers = stack(nested.reverse()).reverse();
​
        xScale.domain([
          0,
          d3.max(layers, function (layer){
            return d3.max(layer.values, function (d){
              return d.y0 + d.y;
            });
          })
        ]);
​
        yScale.domain(layers[0].values.map(function (d){
          return d[yColumn];
        }));
​
        colorScale.domain(layers.map(function (layer){
          return layer.key;
        }));
​
        xAxisG.call(xAxis); 
        yAxisG.call(yAxis);
​
        renderBars(baseBarLayer, layers);
        
        if(hoveredColorValue){
          setOverlayTransparency(0.7);
          renderBars(foregroundBarLayer, layers.filter(function (layer){
            return layer.key === hoveredColorValue;
          }));
        } else {
          setOverlayTransparency(0.0);
          renderBars(foregroundBarLayer, []);
        }
        
        colorLegendG.call(colorLegend);
        
        // Move the text down a bit.
        colorLegendG.selectAll("text").attr("y", 4);
        
        listenForHover(colorLegendG.selectAll("rect"), data);
        listenForHover(colorLegendG.selectAll("text"), data);
      }
      
      function renderBars(g, layers){
        var layerGs = g.selectAll(".layer").data(layers);
        layerGs.enter().append("g").attr("class", "layer");
        layerGs.exit().remove();
​
        layerGs.style("fill", function (d){
          return colorScale(d.key);
        });
​
        var bars = layerGs.selectAll("rect").data(function (d){
          return d.values;
        });
        bars.enter().append("rect")
          .on("mouseover", function(d){
            tip.show(d);
          
            // Fix the issue where the tip goes off the screen.
            d3.select(".d3-tip").style("left", "100px");
          })
          .on("mouseout", tip.hide);
        bars.exit().remove();
        bars
          .attr("x", function (d){ return xScale(d.y0); })
          .attr("y", function (d){ return yScale(d[yColumn]); })
          .attr("width", function (d){ return xScale(d.y); })
          .attr("height", yScale.rangeBand());
      }
      
      function listenForHover(selection, data){
        selection
          .on("mouseover", function (d){
            hoveredColorValue = d;
            render(data);
          })
          .on("mouseout", function (d){
            hoveredColorValue = null;
            render(data);
          })
          .style("cursor", "pointer");
      }
      
      function setOverlayTransparency(alpha){
        overlayRect
          .transition().duration(400)
          .attr("fill", "rgba(255, 255, 255, " + alpha + ")");
      }
​
      function type(d){
        d.population = +d.population;
        return d;
      }
​
      d3.csv("religionByCountryBanned7.csv", type, render);
​
    </script>
  </body>
</html>
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