mohamed-ali/README.md

## README.md

      
    Raw
  

              README.md
            
          
    Using d3.js and TopoJson to draw a zoomable map of Tunisia. Done by Mohamed Ali Jamaoui. To know more about Tunisia check this Wiki http://en.wikipedia.org/wiki/Tunisia

  
## index.html
<!DOCTYPE html>
<meta charset="utf-8">
<head>
<style>

.background {
  fill: none;
  pointer-events: all;
}

.feature {
  fill: #ccc;
  cursor: pointer;
}

.feature.active {
  fill: orange;
}

path {
  fill: #ccc;
  stroke: #fff;
  stroke-width: .5px;
}

path:hover {
  fill: #00AEEC;
}

.mesh {
  fill: none;
  stroke: #fff;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1px;
}


</style>
</head>
<body>
<script src="http://d3js.org/d3.v3.min.js"></script>
<script src="http://d3js.org/topojson.v1.min.js"></script>
<script>

var width = 960,
    height = 500,
    active = d3.select(null);


var path = d3.geo.path();

var svg = d3.select("body").append("svg")
    .attr("width", width)
    .attr("height", height);

svg.append("rect")
    .attr("class", "background")
    .attr("width", width)
    .attr("height", height)
    .on("click", reset);

var g = svg.append("g")
    .style("stroke-width", "1.5px");

d3.json("tunisia.json", function(error, topology) {

  var featureCollection = topojson.feature(topology, topology.objects.governorates);
  var bounds = d3.geo.bounds(featureCollection);

  var centerX = d3.sum(bounds, function(d) {return d[0];}) / 2,
      centerY = d3.sum(bounds, function(d) {return d[1];}) / 2;

  var projection = d3.geo.mercator()
    .scale(3000)
    .center([centerX, centerY]);

  path.projection(projection);

  g.selectAll("path")
      .data(featureCollection.features)
    .enter().append("path")
      .attr("d", path)
      .attr("class", "feature")
      .on("click", clicked);

  g.append("path")
      .datum(topojson.mesh(topology, featureCollection.features, function(a, b) { return a !== b; }))
      .attr("class", "mesh")
      .attr("d", path);
});

function clicked(d) {
  if (active.node() === this) return reset();
  active.classed("active", false);
  active = d3.select(this).classed("active", true);

  var bounds = path.bounds(d),
      dx = bounds[1][0] - bounds[0][0],
      dy = bounds[1][1] - bounds[0][1],
      x = (bounds[0][0] + bounds[1][0]) / 2,
      y = (bounds[0][1] + bounds[1][1]) / 2,
      scale = .9 / Math.max(dx / width, dy / height),
      translate = [width / 2 - scale * x, height / 2 - scale * y];

  g.transition()
      .duration(750)
      .style("stroke-width", 1.5 / scale + "px")
      .attr("transform", "translate(" + translate + ")scale(" + scale + ")");
}

function reset() {
  active.classed("active", false);
  active = d3.select(null);

  g.transition()
      .duration(750)
      .style("stroke-width", "1.5px")
      .attr("transform", "");
}

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

## tunisia.json

      
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              tunisia.json
            
          
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	<!DOCTYPE html>
	<meta charset="utf-8">
	<head>
	<style>

	.background {
	fill: none;
	pointer-events: all;
	}

	.feature {
	fill: #ccc;
	cursor: pointer;
	}

	.feature.active {
	fill: orange;
	}

	path {
	fill: #ccc;
	stroke: #fff;
	stroke-width: .5px;
	}

	path:hover {
	fill: #00AEEC;
	}

	.mesh {
	fill: none;
	stroke: #fff;
	stroke-linecap: round;
	stroke-linejoin: round;
	stroke-width: 1px;
	}



	</style>
	</head>
	<body>
	<script src="http://d3js.org/d3.v3.min.js"></script>
	<script src="http://d3js.org/topojson.v1.min.js"></script>
	<script>

	var width = 960,
	height = 500,
	active = d3.select(null);



	var path = d3.geo.path();

	var svg = d3.select("body").append("svg")
	.attr("width", width)
	.attr("height", height);

	svg.append("rect")
	.attr("class", "background")
	.attr("width", width)
	.attr("height", height)
	.on("click", reset);

	var g = svg.append("g")
	.style("stroke-width", "1.5px");

	d3.json("tunisia.json", function(error, topology) {

	var featureCollection = topojson.feature(topology, topology.objects.governorates);
	var bounds = d3.geo.bounds(featureCollection);

	var centerX = d3.sum(bounds, function(d) {return d[0];}) / 2,
	centerY = d3.sum(bounds, function(d) {return d[1];}) / 2;

	var projection = d3.geo.mercator()
	.scale(3000)
	.center([centerX, centerY]);

	path.projection(projection);

	g.selectAll("path")
	.data(featureCollection.features)
	.enter().append("path")
	.attr("d", path)
	.attr("class", "feature")
	.on("click", clicked);

	g.append("path")
	.datum(topojson.mesh(topology, featureCollection.features, function(a, b) { return a !== b; }))
	.attr("class", "mesh")
	.attr("d", path);
	});

	function clicked(d) {
	if (active.node() === this) return reset();
	active.classed("active", false);
	active = d3.select(this).classed("active", true);

	var bounds = path.bounds(d),
	dx = bounds[1][0] - bounds[0][0],
	dy = bounds[1][1] - bounds[0][1],
	x = (bounds[0][0] + bounds[1][0]) / 2,
	y = (bounds[0][1] + bounds[1][1]) / 2,
	scale = .9 / Math.max(dx / width, dy / height),
	translate = [width / 2 - scale * x, height / 2 - scale * y];

	g.transition()
	.duration(750)
	.style("stroke-width", 1.5 / scale + "px")
	.attr("transform", "translate(" + translate + ")scale(" + scale + ")");
	}

	function reset() {
	active.classed("active", false);
	active = d3.select(null);

	g.transition()
	.duration(750)
	.style("stroke-width", "1.5px")
	.attr("transform", "");
	}

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