Capabilities - Stacked to multiple

readme.md

Adapts the "Stacked to multiples" chart (http://bl.ocks.org/mbostock/4679202)

This chart shows how small changes in sub-categories affect the total value.

ba-skills.tsv

d3-tip.js

// d3.tip
// Copyright (c) 2013 Justin Palmer
//
// Tooltips for d3.js SVG visualizations

(function (root, factory) {
  if (typeof define === 'function' && define.amd) {
    // AMD. Register as an anonymous module with d3 as a dependency.
    define(['d3'], factory)
  } else {
    // Browser global.
    root.d3.tip = factory(root.d3)
  }
}(this, function (d3) {

  // Public - contructs a new tooltip
  //
  // Returns a tip
  return function() {
    var direction = d3_tip_direction,
        offset    = d3_tip_offset,
        html      = d3_tip_html,
        node      = initNode(),
        svg       = null,
        point     = null,
        target    = null
  
    function tip(vis) {
      svg = getSVGNode(vis)
      point = svg.createSVGPoint()
      document.body.appendChild(node)
    }
  
    // Public - show the tooltip on the screen
    //
    // Returns a tip
    tip.show = function() {
      var args = Array.prototype.slice.call(arguments)
      if(args[args.length - 1] instanceof SVGElement) target = args.pop()
  
      var content = html.apply(this, args),
          poffset = offset.apply(this, args),
          dir     = direction.apply(this, args),
          nodel   = d3.select(node),
          i       = directions.length,
          coords,
          scrollTop  = document.documentElement.scrollTop || document.body.scrollTop,
          scrollLeft = document.documentElement.scrollLeft || document.body.scrollLeft
  
      nodel.html(content)
        .style({ opacity: 1, 'pointer-events': 'all' })
  
      while(i--) nodel.classed(directions[i], false)
      coords = direction_callbacks.get(dir).apply(this)
      nodel.classed(dir, true).style({
        top: (coords.top +  poffset[0]) + scrollTop + 'px',
        left: (coords.left + poffset[1]) + scrollLeft + 'px'
      })
  
      return tip
    }
  
    // Public - hide the tooltip
    //
    // Returns a tip
    tip.hide = function() {
      nodel = d3.select(node)
      nodel.style({ opacity: 0, 'pointer-events': 'none' })
      return tip
    }
  
    // Public: Proxy attr calls to the d3 tip container.  Sets or gets attribute value.
    //
    // n - name of the attribute
    // v - value of the attribute
    //
    // Returns tip or attribute value
    tip.attr = function(n, v) {
      if (arguments.length < 2 && typeof n === 'string') {
        return d3.select(node).attr(n)
      } else {
        var args =  Array.prototype.slice.call(arguments)
        d3.selection.prototype.attr.apply(d3.select(node), args)
      }
  
      return tip
    }
  
    // Public: Proxy style calls to the d3 tip container.  Sets or gets a style value.
    //
    // n - name of the property
    // v - value of the property
    //
    // Returns tip or style property value
    tip.style = function(n, v) {
      if (arguments.length < 2 && typeof n === 'string') {
        return d3.select(node).style(n)
      } else {
        var args =  Array.prototype.slice.call(arguments)
        d3.selection.prototype.style.apply(d3.select(node), args)
      }
  
      return tip
    }
  
    // Public: Set or get the direction of the tooltip
    //
    // v - One of n(north), s(south), e(east), or w(west), nw(northwest),
    //     sw(southwest), ne(northeast) or se(southeast)
    //
    // Returns tip or direction
    tip.direction = function(v) {
      if (!arguments.length) return direction
      direction = v == null ? v : d3.functor(v)
  
      return tip
    }
  
    // Public: Sets or gets the offset of the tip
    //
    // v - Array of [x, y] offset
    //
    // Returns offset or
    tip.offset = function(v) {
      if (!arguments.length) return offset
      offset = v == null ? v : d3.functor(v)
  
      return tip
    }
  
    // Public: sets or gets the html value of the tooltip
    //
    // v - String value of the tip
    //
    // Returns html value or tip
    tip.html = function(v) {
      if (!arguments.length) return html
      html = v == null ? v : d3.functor(v)
  
      return tip
    }
  
    function d3_tip_direction() { return 'n' }
    function d3_tip_offset() { return [0, 0] }
    function d3_tip_html() { return ' ' }
  
    var direction_callbacks = d3.map({
      n:  direction_n,
      s:  direction_s,
      e:  direction_e,
      w:  direction_w,
      nw: direction_nw,
      ne: direction_ne,
      sw: direction_sw,
      se: direction_se
    }),
  
    directions = direction_callbacks.keys()
  
    function direction_n() {
      var bbox = getScreenBBox()
      return {
        top:  bbox.n.y - node.offsetHeight,
        left: bbox.n.x - node.offsetWidth / 2
      }
    }
  
    function direction_s() {
      var bbox = getScreenBBox()
      return {
        top:  bbox.s.y,
        left: bbox.s.x - node.offsetWidth / 2
      }
    }
  
    function direction_e() {
      var bbox = getScreenBBox()
      return {
        top:  bbox.e.y - node.offsetHeight / 2,
        left: bbox.e.x
      }
    }
  
    function direction_w() {
      var bbox = getScreenBBox()
      return {
        top:  bbox.w.y - node.offsetHeight / 2,
        left: bbox.w.x - node.offsetWidth
      }
    }
  
    function direction_nw() {
      var bbox = getScreenBBox()
      return {
        top:  bbox.nw.y - node.offsetHeight,
        left: bbox.nw.x - node.offsetWidth
      }
    }
  
    function direction_ne() {
      var bbox = getScreenBBox()
      return {
        top:  bbox.ne.y - node.offsetHeight,
        left: bbox.ne.x
      }
    }
  
    function direction_sw() {
      var bbox = getScreenBBox()
      return {
        top:  bbox.sw.y,
        left: bbox.sw.x - node.offsetWidth
      }
    }
  
    function direction_se() {
      var bbox = getScreenBBox()
      return {
        top:  bbox.se.y,
        left: bbox.e.x
      }
    }
  
    function initNode() {
      var node = d3.select(document.createElement('div'))
      node.style({
        position: 'absolute',
        top: 0,
        opacity: 0,
        'pointer-events': 'none',
        'box-sizing': 'border-box'
      })
  
      return node.node()
    }
  
    function getSVGNode(el) {
      el = el.node()
      if(el.tagName.toLowerCase() == 'svg')
        return el
  
      return el.ownerSVGElement
    }
  
    // Private - gets the screen coordinates of a shape
    //
    // Given a shape on the screen, will return an SVGPoint for the directions
    // n(north), s(south), e(east), w(west), ne(northeast), se(southeast), nw(northwest),
    // sw(southwest).
    //
    //    +-+-+
    //    |   |
    //    +   +
    //    |   |
    //    +-+-+
    //
    // Returns an Object {n, s, e, w, nw, sw, ne, se}
    function getScreenBBox() {
      var targetel   = target || d3.event.target,
          bbox       = {},
          matrix     = targetel.getScreenCTM(),
          tbbox      = targetel.getBBox(),
          width      = tbbox.width,
          height     = tbbox.height,
          x          = tbbox.x,
          y          = tbbox.y
  
      point.x = x
      point.y = y
      bbox.nw = point.matrixTransform(matrix)
      point.x += width
      bbox.ne = point.matrixTransform(matrix)
      point.y += height
      bbox.se = point.matrixTransform(matrix)
      point.x -= width
      bbox.sw = point.matrixTransform(matrix)
      point.y -= height / 2
      bbox.w  = point.matrixTransform(matrix)
      point.x += width
      bbox.e = point.matrixTransform(matrix)
      point.x -= width / 2
      point.y -= height / 2
      bbox.n = point.matrixTransform(matrix)
      point.y += height
      bbox.s = point.matrixTransform(matrix)
  
      return bbox
    }
  
    return tip
  };

}));

index.html

<!DOCTYPE html>
<meta charset="utf-8">

<link type="text/css" rel="stylesheet" href="tooltip-styles-stackedchart.css">
<style>

body {
  font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
  color: white;
  background-color: black;
  margin: auto;
  position: relative;
  width: 960px;
}

text {
  font: 10px sans-serif;
    fill: white;
}

.axis path {
  display: none;
}

.axis line {
  fill: none;
  stroke: #000;
  shape-rendering: crispEdges;
}

.group-label {
  font-weight: bold;
  text-anchor: end;
}

form {
  position: absolute;
  right: 10px;
  top: 10px;
}

label {

	top: 10px;
	right: 0px;
}



</style>
<form>
  <label><input type="radio" name="mode" value="multiples" checked> Multiples</label>
  <label><input type="radio" name="mode" value="stacked"> Stacked</label>
</form>

<script src="http://d3js.org/d3.v3.min.js"></script>
<script src="d3-tip.js"></script>
<script>




var margin = {top: 10, right: 20, bottom: 20, left: 240},
    width = 960 - margin.left - margin.right,
    height = 700 - margin.top - margin.bottom;

var y0 = d3.scale.ordinal()
    .rangeRoundBands([height, 0], .4);

var y1 = d3.scale.linear();

var x = d3.scale.ordinal()
    .rangeRoundBands([0, width], .1, 0);

var xAxis = d3.svg.axis()
    .scale(x)
    .orient("bottom");

var nest = d3.nest()
    .key(function(d) { return d.capability; });

var stack = d3.layout.stack()
    .values(function(d) { return d.values; })
    .x(function(d) { return d.assessmentdate; })
    .y(function(d) { return d.totalyears; })
    .out(function(d, y0) { d.valueOffset = y0; });

var color = d3.scale.ordinal();

var svg = d3.select("body").append("svg")
    .attr("width", width + margin.left + margin.right)
    .attr("height", height + margin.top + margin.bottom)
  .append("g")
    .attr("transform", "translate(" + margin.left + "," + margin.top + ")");
	
	
	var tip = d3.tip()
  .attr('class', 'd3-tip')
  .offset([0, -195])
  .html(function(d) {
    return "<strong>Total years:</strong> " + d.totalyears;
  })
  
  svg.call(tip);

d3.tsv("ba-skills.tsv", function(error, data) {

  data.forEach(function(d) {
    d.totalyears = +d.totalyears;
  });

  var dataByGroup = nest.entries(data);

  stack(dataByGroup);
  x.domain(dataByGroup[0].values.map(function(d) { return d.assessmentdate; }));
  y0.domain(dataByGroup.map(function(d) { return d.key; }));
  y1.domain([0, d3.max(data, function(d) { return d.totalyears; })]).range([y0.rangeBand(), 0]);

  color
	.range(["darkred","red"])
	.domain([0, dataByGroup.length - 1]);
  
  /*color
      .range(d3.range(dataByGroup.length).map(d3.scale.linear()
      .domain([0, dataByGroup.length - 1])
		.range(["blue", "red"])
		.interpolate(d3.interpolateLab)));*/
		
	/*color
      .range(d3.range(dataByGroup.length).map(d3.scale.linear()
      .domain([0, dataByGroup.length - 1])
		.range(["blue", "red"])
		.interpolate(d3.interpolateLab)));*/
  
  var group = svg.selectAll(".group")
      .data(dataByGroup)
    .enter().append("g")
      .attr("class", "group")
      .attr("transform", function(d) { return "translate(0," + y0(d.key) + ")"; });

  group.append("text")
      .attr("class", "group-label")
      .attr("x", -6)
      .attr("y", function(d) { return y1(d.values[0].totalyears / 2); })
      .attr("dy", ".35em")
      .text(function(d) { return d.key; });

  group.selectAll("rect")
      .data(function(d) { return d.values; })
    .enter().append("rect")
		.attr("class", "bar")
      .style("fill", function(d) { return color(d.capability); })
      .attr("x", function(d) { return x(d.assessmentdate); })
      .attr("y", function(d) { return y1(d.totalyears); })
      .attr("width", x.rangeBand())
      .attr("height", function(d) { return y0.rangeBand() - y1(d.totalyears); })
	  .on('mouseover', tip.show)
      .on('mouseout', tip.hide);;

  group.filter(function(d, i) { return !i; }).append("g")
      .attr("class", "x axis")
      .attr("transform", "translate(0," + y0.rangeBand() + ")")
      .call(xAxis);

  d3.selectAll("input").on("change", change);

  /*var timeout = setTimeout(function() {
    d3.select("input[value=\"stacked\"]").property("checked", true).each(change);
  }, 2000);*/

  function change() {
    //clearTimeout(timeout);
    if (this.value === "multiples") transitionMultiples();
    else transitionStacked();
  }

  function transitionMultiples() {
    var t = svg.transition().duration(750),
        g = t.selectAll(".group").attr("transform", function(d) { return "translate(0," + y0(d.key) + ")"; });
    g.selectAll("rect").attr("y", function(d) { return y1(d.totalyears); });
    g.select(".group-label").attr("y", function(d) { return y1(d.values[0].totalyears / 2); })
  }

  function transitionStacked() {
    var t = svg.transition().duration(750),
        g = t.selectAll(".group").attr("transform", "translate(0," + y0(y0.domain()[0]) + ")");
    g.selectAll("rect").attr("y", function(d) { return y1(d.totalyears + d.valueOffset); });
    g.select(".group-label").attr("y", function(d) { return y1(d.values[0].totalyears / 2 + d.values[0].valueOffset); })
  }
});

</script>

thumbnail.png

tooltip-styles-stackedchart.css

/*.d3-tip {
  line-height: 1;
  font-weight: bold;
  padding: 12px;
  background: rgba(0, 0, 0, 0.8);
  color: #fff;
  border-radius: 2px;
  pointer-events: none;
}*/


.d3-tip {
  display: block;
  position: absolute; 
  padding: .5em;
  content: attr(title);
  min-width: 120px;
  text-align: center;
  width: auto;
  height: auto;
  white-space: nowrap;
  top: -32px;
  background: white;
  -moz-border-radius:5px;
  -webkit-border-radius:5px;
  border-radius:5px;    
  color: black;
  font-size: .86em;
  pointer-events: none;
}





/* Eastward tooltips */
.d3-tip.e:after {
  content: "\25C0";
  margin: -4px 0 0 0;
  top: 50%;
  left: -8px;
}

/* Southward tooltips */
.d3-tip.s:after {
  content: "\25B2";
  margin: 0 0 1px 0;
  top: -8px;
  left: 0;
  text-align: center;
}

/* Westward tooltips */
.d3-tip.w:after {
  content: "\25B6";
  margin: -4px 0 0 -1px;
  top: 50%;
  left: 100%;
}