sergeiwallace/highlight.csv

## highlight.csv
county
St_Lawrence
Chemung
Ulster
Albany

## index.html
<!DOCTYPE html>
<meta charset="utf-8">
  <style>
    @import url(styles.css);
  </style>
    <script src="//d3js.org/d3.v3.min.js"></script>
    <script src="//d3js.org/queue.v1.min.js"></script>
<body>

  <div id="map_container">
  <script>
    var mw = 800; // map container width
    var mh = 600; // map container height
    var toolTipVisible = true;
    var svg = d3.select("#map_container")
        .append("svg")
        .attr({"width": mw, "height": mh});
    var data;
    var ny;

    // Define the div for the tooltip
    var div = d3.select("body").append("div")
        .attr("class", "tooltip")
        .style("opacity", 0);

    queue()
    .defer(d3.csv, "highlight.csv", data)
    .await(ready);

    function ready(error, data) {
      if (error) throw error;

      d3.xml("ny.svg", "image/svg+xml", function(error, xml) { /* embed the SVG map */
        if (error) throw error;

        var svgMap = xml.getElementsByTagName("g")[0]; /* set svgMap to root g */
        ny = svg.node().appendChild(svgMap); /* ny map */

        svg.selectAll("#counties").selectAll("polygon")
          .on("click", handleClick)
          .on("mouseover", handleMouseOver)
          .on("mouseout", handleMouseOut);

        svg.selectAll("#counties").selectAll("path")
          .on("click", handleClick)
          .on("mouseover", handleMouseOver)
          .on("mouseout", handleMouseOut);

        d3.map(data, function(d) {
          console.log(d.county)
          d3.select("#"+d.county).attr("class", "highlight");
        });

      });
    }

    function handleClick(d, i){
      id = d3.select(this).attr('id');
    }

    function handleMouseOver(d){
      if (d3.select(this).classed("active")) return;
      /* no need to change class when county is already selected */

      if (!d3.select(this).classed("highlight")){
        d3.select(this).attr("class", "hover");
      }

      if(toolTipVisible){
        div.transition()
            .duration(200)
            .style("opacity", .9);
        div .html(d3.select(this).attr('id').replace("_", " "))
            .style("left", (d3.event.pageX) + "px")
            .style("top", (d3.event.pageY - 5) + "px");
      }
    }

    function handleMouseOut(d){
      if (d3.select(this).classed("active")) return;

      if (!d3.select(this).classed("highlight")){
        d3.select(this).attr("class", "st0");
      }

      div.transition()
          .duration(200)
          .style("opacity", 0);
      div .html('')
          .style("left", "0px")
          .style("top", "0px");
    }

  </script>
</body>
</html>

## ny.svg

      
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## styles.css
/* style.css */
polygon.st0, path.st0 {
  fill: whitesmoke;
  stroke: #333;
  stroke-width: 1px;
  transition: all 1s;
}
.active {
  fill: steelblue;
}
.hover {
  fill: #69c;
}

div.tooltip {
    position: absolute;
    text-align: center;
    padding: 5px;
    font: 12px sans-serif;
    background: snow;
    border: 0px;
    pointer-events: none;
    border: 1px solid #000;
}

.highlight {
  fill: steelblue;
}

rect {
  fill: none;
  pointer-events: all;
}

.text {
  stroke:#333;
  text-anchor: middle;
  font-family: "sans-serif";
  stroke-width: 0.5;
  fill: #333;
  font-size: 10pt;
}
	<!DOCTYPE html>
	<meta charset="utf-8">
	<style>
	@import url(styles.css);
	</style>
	<script src="//d3js.org/d3.v3.min.js"></script>
	<script src="//d3js.org/queue.v1.min.js"></script>
	<body>

	<div id="map_container">
	<script>
	var mw = 800; // map container width
	var mh = 600; // map container height
	var toolTipVisible = true;
	var svg = d3.select("#map_container")
	.append("svg")
	.attr({"width": mw, "height": mh});
	var data;
	var ny;

	// Define the div for the tooltip
	var div = d3.select("body").append("div")
	.attr("class", "tooltip")
	.style("opacity", 0);

	queue()
	.defer(d3.csv, "highlight.csv", data)
	.await(ready);

	function ready(error, data) {
	if (error) throw error;

	d3.xml("ny.svg", "image/svg+xml", function(error, xml) { /* embed the SVG map */
	if (error) throw error;

	var svgMap = xml.getElementsByTagName("g")[0]; /* set svgMap to root g */
	ny = svg.node().appendChild(svgMap); /* ny map */

	svg.selectAll("#counties").selectAll("polygon")
	.on("click", handleClick)
	.on("mouseover", handleMouseOver)
	.on("mouseout", handleMouseOut);

	svg.selectAll("#counties").selectAll("path")
	.on("click", handleClick)
	.on("mouseover", handleMouseOver)
	.on("mouseout", handleMouseOut);

	d3.map(data, function(d) {
	console.log(d.county)
	d3.select("#"+d.county).attr("class", "highlight");
	});

	});
	}

	function handleClick(d, i){
	id = d3.select(this).attr('id');
	}

	function handleMouseOver(d){
	if (d3.select(this).classed("active")) return;
	/* no need to change class when county is already selected */

	if (!d3.select(this).classed("highlight")){
	d3.select(this).attr("class", "hover");
	}

	if(toolTipVisible){
	div.transition()
	.duration(200)
	.style("opacity", .9);
	div .html(d3.select(this).attr('id').replace("_", " "))
	.style("left", (d3.event.pageX) + "px")
	.style("top", (d3.event.pageY - 5) + "px");
	}
	}

	function handleMouseOut(d){
	if (d3.select(this).classed("active")) return;

	if (!d3.select(this).classed("highlight")){
	d3.select(this).attr("class", "st0");
	}

	div.transition()
	.duration(200)
	.style("opacity", 0);
	div .html('')
	.style("left", "0px")
	.style("top", "0px");
	}

	</script>
	</body>
	</html>
	/* style.css */
	polygon.st0, path.st0 {
	fill: whitesmoke;
	stroke: #333;
	stroke-width: 1px;
	transition: all 1s;
	}
	.active {
	fill: steelblue;
	}
	.hover {
	fill: #69c;
	}

	div.tooltip {
	position: absolute;
	text-align: center;
	padding: 5px;
	font: 12px sans-serif;
	background: snow;
	border: 0px;
	pointer-events: none;
	border: 1px solid #000;
	}

	.highlight {
	fill: steelblue;
	}

	rect {
	fill: none;
	pointer-events: all;
	}

	.text {
	stroke:#333;
	text-anchor: middle;
	font-family: "sans-serif";
	stroke-width: 0.5;
	fill: #333;
	font-size: 10pt;
	}