Kroměříž 2012

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<title>Kroměříž 2012</title>
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<style>

#chart {
  margin-left: -40px;
  height: 506px;
}

text {
  font: 10px sans-serif;
}

.dot {
  stroke: #000;
  opacity: .5;
  stroke-opacity: .75;
}

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

.label {
  fill: #777;
}

.year.label {
  font: 500 100px "Helvetica Neue";
  fill: #ddd;
}

.year.label.active {
  fill: #aaa;
}

.overlay {
  fill: none;
  pointer-events: all;
  cursor: ew-resize;
}

</style>

</head>
<body>
<div data-role="page" class="type-home">
	<div data-role="content">

<header>
  <aside>May 28, 2013</aside>
  <a href="../" rel="author">Michal Škop</a>
</header>

<h1>Kroměříž 2012</h1>

<form>
        <label for="slider">Slider:</label>
        <input name="slider" id="slider" min="2012.25" max="2012.75" value="2012.25" step=".01" type="range" />
</form>
<p>
    <a href="#" id="play" data-role="button" data-inline="true" data-icon="refresh"><span id="playText">Play ></span></a>
</p>

<p>Method: weighted PCA; Time intervals: 6 months (projection of 6-month blocks into all data)</p>
<p>Data thanks to <a href="https://blog.aktualne.centrum.cz/blogy/vojtech-navratil.php">V. Navrátil</a></p>
<p>Using <a href="https://github.com/michalskop/mpv_motion">Models of parliamentary voting in motion</a></p>

// Various accessors that specify the four dimensions of data to visualize.
function x(d) { return d.d1; }
function y(d) { return d.d2; }
function z(d) { return d.d3; }
function radius(d) { return 1; }
function color(d) { return d.color; }
//function color(d) { return d.group; }
function key(d) { return d.name; }
function display(d) {return d.display;}

// Chart dimensions.
var margin = {top: 19.5, right: 19.5, bottom: 19.5, left: 39.5},
    width = 600 - margin.right,
    height = 400 - margin.top - margin.bottom;

// Various scales. These domains make assumptions of data, naturally.
var xScale = d3.scale.linear().domain([-3, 3]).range([0, width]),
    yScale = d3.scale.linear().domain([-2.5, 2.5]).range([height, 0]),
    radiusScale = d3.scale.sqrt().domain([0, 1]).range([0, 10]);
    //colorScale = d3.scale.category10();
    var colorScale = d3.scale.category20c();

// The x & y axes.
var xAxis = d3.svg.axis().orient("bottom").scale(xScale).ticks(12, d3.format(",d")),
    yAxis = d3.svg.axis().scale(yScale).orient("left");

// Create the SVG container and set the origin.
var svg = d3.select("#chart svg") //d3.select("#chart").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 + ")");

// Add the x-axis.
svg.append("g")
    .attr("class", "x axis")
    .attr("transform", "translate(0," + height + ")")
    .call(xAxis);

// Add the y-axis.
svg.append("g")
    .attr("class", "y axis")
    .call(yAxis);

// Add an x-axis label.
svg.append("text")
    .attr("class", "x label")
    .attr("text-anchor", "end")
    .attr("x", width)
    .attr("y", height - 6)
    .text("Dimension 1");

// Add a y-axis label.
svg.append("text")
    .attr("class", "y label")
    .attr("text-anchor", "end")
    .attr("y", 6)
    .attr("dy", ".75em")
    .attr("transform", "rotate(-90)")
    .text("Dimension 2");

// Add the year label; the value is set on transition.
var label = svg.append("text")
    .attr("class", "year label")
    .attr("text-anchor", "end")
    .attr("y", height - 24)
    .attr("x", width)
    .text("2012/1");

// Load the data.
d3.json("cz_kromeriz_2012_1h.json", function(nations) {

// A bisector since many nation's data is sparsely-defined.
  var bisect = d3.bisector(function(d) { return d[0]; });

// Add a dot per nation. Initialize the data at 1800, and set the colors.
  var dot = svg.append("g")
      .attr("class", "dots")
    .selectAll(".dot")
      .data(interpolateData(2012.25))
    .enter().append("circle")
      .attr("class", "dot")
      //.style("fill", function(d) { return d.group; })
      //.style("fill", function (d) { return gradient(colorScale(color(d))) })
      .call(position)
      .sort(order)
      .on("mouseover", animateFirstStep)
        .on("mouseout", animateSecondStep)
        .on("mousedown", animateFirstStep);

// Add a title.
  dot.append("title")
      .text(function(d) { return d.name});

var i=0;
  var playing = false;
  $("#play").click(function() {
	  if(playing === false) {
		    startPlaying();
		} else {
			stopPlaying();
		}

});
  
  function startPlaying() {
  	playing = true;
    $("#playText").html("Stop ||");
    $('#slider').slider('disable');
    // Start a transition that interpolates the data based on year.
    svg.transition()
	  .duration(30000)
	  .ease("linear")
	  .tween("year", function() {return tweenYear($('#slider').val()) })
	  .each("end", stopPlaying);
  }
  
  function stopPlaying() {
	playing = false;
    $("#playText").html("Play >");
    svg.transition().duration(0);
    $('#slider').slider('enable');
  }

// Positions the dots based on data.
  function position(dot) {
    dot .attr("cx", function(d) { return xScale(x(d)); })
        .attr("cy", function(d) { return yScale(y(d)); })
        .attr("r", function(d) { return radiusScale(radius(d)) })
       //.style("fill", function(d) { return color(d); });
        .style("fill", function (d) { return gradient(color(d)) })
		//.attr("style", function (d) { return "display:" + display(d)+";";});
		.attr("display", function (d) { return display(d);});
        //alert(dot.data);
  }

// Defines a sort order so that the smallest dots are drawn on top.
  function order(a, b) {
    return radius(b) - radius(a);
  }

// Tweens the entire chart by first tweening the year, and then the data.
  // For the interpolated data, the dots and label are redrawn.
  function tweenYear(start) {
    var year = d3.interpolateNumber(2012.25,2012.75);
    return function(t) { displayYear(year(t)); };
  }
  
  // Updates the display to show the specified year.
  function displayYear(year) {
    dot.data(interpolateData(year), key).call(position).sort(order);
    month = Math.ceil((year - Math.floor(year))*12);
    label.text(Math.floor(year) + '/' + month);
    i++;
    if ((i%25) == 0) {
      $("#slider").val(year);
      $('#slider').slider('refresh');
    }
  }

// Interpolates the dataset for the given (fractional) year.
  function interpolateData(year) {
    return nations.map(function(d) {
      return {
        name: d.name,
        //group: d.group,
        d1: interpolateValues(d.d1, year),
        d2: interpolateValues(d.d2, year),
        //d3: interpolateValues(d.d3, year),
        color: findColor(d.color, year),
        display: isDisplayed(d.d1, year)
        //category: d.group
        //lifeExpectancy: interpolateValues(d.lifeExpectancy, year)
      };
    });
  }

// Finds (and possibly interpolates) the value for the specified year.
  function interpolateValues(values, year) {
    var i = bisect.left(values, year, 0, values.length - 1),
        a = values[i];
    if (i > 0) {
      var b = values[i - 1],
          t = (year - a[0]) / (b[0] - a[0]);
      return a[1] * (1 - t) + b[1] * t;
    }
    return a[1];
  }
  
  function findColor(values, year) {
     var i = bisect.left(values, year, 0, values.length - 1);
     return values[i][1];
  }
  
  function isDisplayed(values, year) {
     if ( (year < values[0][0]) || (year > values[values.length - 1][0]))
       return 'none';
     else 
       return 'inherit';
  }
  
  	function animateFirstStep(d){
		d3.select(this)
		  .transition()            
		    .delay(0)            
		    .duration(1000)
		    .attr("r", 10*2)
		    //.attr("cx", 300*d.x+150+50)
		    ;//.each("end", animateSecondStep);
	}
	
		function animateSecondStep(d){
		d3.select(this)
		  .transition()
		    .duration(1000)
		    .attr("r", 10);
		    //.attr("cx", 300*d.x+150);
	}
	
	//slider
	//see https://michalskop.tumblr.com/post/37352195911/strange-behaviour-of-jquery-change
	$('#slider').ready(function() {
	  $('#slider').change(function(){
		displayYear($(this).val());
	  });
	});
	
	
	//color gradients
	//https://dexvis.wordpress.com/2012/12/25/motion-charts-revisited/
	function shadeColor(color, percent) {

var R = parseInt(color.substring(1,3),16)
		var G = parseInt(color.substring(3,5),16)
		var B = parseInt(color.substring(5,7),16);

R = parseInt(R * (100 + percent) / 100);
		G = parseInt(G * (100 + percent) / 100);
		B = parseInt(B * (100 + percent) / 100);

R = (R<255)?R:255;  
		G = (G<255)?G:255;  
		B = (B<255)?B:255;

var RR = ((R.toString(16).length==1)?"0"+R.toString(16):R.toString(16));
		var GG = ((G.toString(16).length==1)?"0"+G.toString(16):G.toString(16));
		var BB = ((B.toString(16).length==1)?"0"+B.toString(16):B.toString(16));

return "#"+RR+GG+BB;
	}

function gradient(baseColor)
	{
	  var gradientId = "gradient" + baseColor.substring(1)
	  console.log("COLOR: " + gradientId);

//var lightColor = shadeColor(baseColor, -10)
	  var darkColor = shadeColor(baseColor, -20) 
	  
	  var grad = d3.select("#gradients").selectAll("#" + gradientId)
		.data([ gradientId ])
		.enter()
		.append("radialGradient")
		.attr("id", gradientId)
		.attr("gradientUnits", "objectBoundingBox")
		.attr("fx", "30%")
		.attr("fy", "30%")

grad.append("stop")
		.attr("offset", "0%")
		.attr("style", "stop-color:#FFFFFF")
	  
	  // Middle
	  grad.append("stop")
		.attr("offset", "40%")
		.attr("style", "stop-color:" + baseColor)

// Outer Edges
	  grad.append("stop")
		.attr("offset", "100%")
		.attr("style", "stop-color:" + darkColor)
	  
	  console.log("url(#" + gradientId + ")")
	  return "url(#" + gradientId + ")";
	}
	
});

</script>

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Modified http://code.jquery.com/jquery-1.8.2.min.js to a secure url

Modified http://code.jquery.com/mobile/1.3.1/jquery.mobile-1.3.1.min.js to a secure url

Modified http://d3js.org/d3.v2.js?2.8.1 to a secure url

https://code.jquery.com/jquery-1.8.2.min.js

https://code.jquery.com/mobile/1.3.1/jquery.mobile-1.3.1.min.js

https://d3js.org/d3.v2.js?2.8.1