arrayjam/index.html

## index.html
<!DOCTYPE html>
<meta charset="utf-8">
<style>
text, label {
  font-family: sans-serif;
}

label {
  position: absolute;
  text-align: center;
  font-weight: bold;
  padding: 0 10px;
  line-height: 50px;
}

input {
  text-align: center;
  width: 5em;
  padding: 5px;
}

.feature {
  stroke: none;
}

.divider {
  stroke: #dedede;
  stroke-width: 0.5px;
}

</style>
<body>
<label for="postcode">
  Enter a Postcode:
  <input id="postcode" autofocus maxlength=4 placeholder="Postcode" type="text" />
</label>
<script src="http://d3js.org/d3.v3.min.js"></script>
<script src="http://d3js.org/topojson.v0.min.js"></script>
<script>
  var width = 750,
    height = 700;

var svg = d3.select("body").append("svg")
    .attr("width", width)
    .attr("height", height + 50);

var g = svg.append("g")
  .attr("transform", "translate(0, 50)")
    .append("g");

var color = d3.scale.category10();

var loading = svg.append("text")
  .attr("x", width / 2)
  .attr("y", height / 2)
  .attr("dy", ".35em")
  .attr("text-anchor", "middle")
  .style("font-size", 40)
  .text("Loading...");

d3.json("b53aa41b4c61df6272fd67fd2691517e87af63a5/postcodes.json", function(error, postcodes) {
  var postcodesgeo = topojson.object(postcodes, postcodes.objects.postcodesgeo).geometries;

  var mainlandWidth = 236;
  var leftMargin = 186;
  var rightMargin = 64;

  var allAus = mainlandWidth + leftMargin + rightMargin;
  var translateWidth = width / (allAus / mainlandWidth);

  var projection = d3.geo.albers()
    .translate([translateWidth, height / 2])
    .scale(1100)
    .rotate([-132.5, 0])
    .center([0, -26.5]) // Center of Australia, accounting for tasmania
    .parallels([-36, -18]);

  var path = d3.geo.path()
    .projection(projection);

  var input = d3.select("input")
      .on("cut", change)
      .on("paste", change)
      .on("change", change)
      .on("keyup", change);

  var feature = g.selectAll("path")
      .data(postcodesgeo)
    .enter().append("path")
      .attr("class", "feature")
      .attr("id", function (d, i) {
            // Here we can compute "id" using datums
            console.log(d);
            return i;
          })
      .attr("d", path);

  loading.remove();

  svg.append("rect")
      .attr("x", 0)
      .attr("y", 0)
      .attr("height", 50)
      .attr("width", width)
      .style("fill", "white");

  svg.append("line")
      .attr("class", "divider")
      .attr("x1", 0)
      .attr("x2", width)
      .attr("y1", 51)
      .attr("y2", 51);

  var legends = svg.append("g").attr("class", "legends");

  svg.selectAll("text.legend")
      .data([0,1,2,3,4,5,6,7,8,9])
    .enter().append("text")
      .attr("class", "legend")
      .attr("y", 25)
      .attr("x", function(d) { return width - (10 - d) * 50 + 25; })
      .style("fill", "white")
      .attr("dy", ".35em")
      .attr("text-anchor", "middle")
      .style("font-size", 20)
      .text(String);

  var prefix = "POA";
  var selectedPostcode;

  change();

  function updateLegend(legend) {
    var container = legends.selectAll("rect.legend")
        .data(legend, function(d) { return d; });

    container
      .transition().duration(750)
        .attr("x", function(d) { return width - (10 - d) * 50; })
        .style("fill", function(d) { return color(d); })
        .attr("y", 0);

    container.enter().append("rect")
        .attr("class", "legend")
        .attr("y", -50)
        .attr("width", 50)
        .attr("height", 50)
        .attr("x", function(d) { return width - (10 - d) * 50; })
      .transition()
        .duration(750)
        .ease("bounce")
        .style("fill", function(d) { return color(d); })
        .attr("y", 0);

    container.exit().transition().duration(400)
        .ease("backs")
        .attr("y", -50)
        .remove();

  }

  function setFoundStyle(selection, postcode) {
    selection.style("fill", color(postcode.slice(-1)));
  }

  function unzoom(selection) {
    selection.transition().duration(750).attr("transform", "");
  }

  function zoom(selection, b, maxScale) {
    var scale = 0.95 / Math.max((b[1][0] - b[0][0]) / width, (b[1][1] - b[0][1]) / height);
    var usedScale = Math.min(scale, maxScale);
    selection.transition().duration(750).attr("transform",
        "translate(" + projection.translate() + ")" +
        "scale(" + usedScale + ")" +
        "translate(" + -(b[1][0] + b[0][0]) / 2 + "," + -(b[1][1] + b[0][1]) / 2 + ")");
  }

  function change() {
    var lastPostcode = selectedPostcode;
    selectedPostcode = input.property("value");
    if (lastPostcode === selectedPostcode) {
      return;
    }

    var shouldUnzoom = selectedPostcode === "";
    var shouldZoom = selectedPostcode.match(/\d{1,4}/);

    if (!shouldUnzoom && !shouldZoom) {
      return;
    }

    var matchString = prefix + selectedPostcode;
    var findBounds = findMinMaxBounds();
    var bounds;
    var legendObj = {};
    var matching = feature.filter(function(d) {
      var match = matchingFeature(d, matchString);
      var next = nextDigit(d, matchString);
      this.style.fill = match ? color(+next) : "#222";
      if (match) {
        if (next) { legendObj[+next] = true; }
        bounds = findBounds(path.bounds(d));
      }
      return match;
    });

    updateLegend(d3.keys(legendObj).map(function(d) { return +d; }));
    if (matching[0].length === 0) { return; }
    if (selectedPostcode.length === 4 && matching[0].length === 1) { matching.call(setFoundStyle, matchString); }

    var zoomers = function() {
      if (shouldZoom) { g.call(zoom, bounds, 100); }
      if (shouldUnzoom) { g.call(unzoom); }
    };
    setTimeout(zoomers, 0);

  }

  function nextDigit(feature, string) {
    return feature.id.charAt(string.length);
  }

  function matchingFeature(feature, string) {
    return feature.id.indexOf(string) !== -1;
  }

  function findMinMaxBounds() {
    var topBound    = -Infinity;
    var rightBound  = -Infinity;
    var bottomBound =  Infinity;
    var leftBound   =  Infinity;
    return function (bound) {
      leftBound = Math.min(bound[0][0], leftBound);
      bottomBound = Math.min(bound[0][1], bottomBound);
      rightBound = Math.max(bound[1][0], rightBound);
      topBound = Math.max(bound[1][1], topBound);
      return [[leftBound, bottomBound], [rightBound, topBound]];
    };
  }
});

d3.select(self.frameElement).style("height", height + "px");
</script>

## postcodes.json

      
Display the source blob

    
Display the rendered blob

    
    Raw
  

              postcodes.json
            
          
      Loading

      Sorry, something went wrong. Reload?
      Sorry, we cannot display this file.
      Sorry, this file is invalid so it cannot be displayed.
      
          Viewer requires iframe.
	<!DOCTYPE html>
	<meta charset="utf-8">
	<style>
	text, label {
	font-family: sans-serif;
	}

	label {
	position: absolute;
	text-align: center;
	font-weight: bold;
	padding: 0 10px;
	line-height: 50px;
	}

	input {
	text-align: center;
	width: 5em;
	padding: 5px;
	}

	.feature {
	stroke: none;
	}

	.divider {
	stroke: #dedede;
	stroke-width: 0.5px;
	}

	</style>
	<body>
	<label for="postcode">
	Enter a Postcode:
	<input id="postcode" autofocus maxlength=4 placeholder="Postcode" type="text" />
	</label>
	<script src="http://d3js.org/d3.v3.min.js"></script>
	<script src="http://d3js.org/topojson.v0.min.js"></script>
	<script>
	var width = 750,
	height = 700;

	var svg = d3.select("body").append("svg")
	.attr("width", width)
	.attr("height", height + 50);

	var g = svg.append("g")
	.attr("transform", "translate(0, 50)")
	.append("g");

	var color = d3.scale.category10();

	var loading = svg.append("text")
	.attr("x", width / 2)
	.attr("y", height / 2)
	.attr("dy", ".35em")
	.attr("text-anchor", "middle")
	.style("font-size", 40)
	.text("Loading...");

	d3.json("b53aa41b4c61df6272fd67fd2691517e87af63a5/postcodes.json", function(error, postcodes) {
	var postcodesgeo = topojson.object(postcodes, postcodes.objects.postcodesgeo).geometries;

	var mainlandWidth = 236;
	var leftMargin = 186;
	var rightMargin = 64;

	var allAus = mainlandWidth + leftMargin + rightMargin;
	var translateWidth = width / (allAus / mainlandWidth);

	var projection = d3.geo.albers()
	.translate([translateWidth, height / 2])
	.scale(1100)
	.rotate([-132.5, 0])
	.center([0, -26.5]) // Center of Australia, accounting for tasmania
	.parallels([-36, -18]);

	var path = d3.geo.path()
	.projection(projection);

	var input = d3.select("input")
	.on("cut", change)
	.on("paste", change)
	.on("change", change)
	.on("keyup", change);

	var feature = g.selectAll("path")
	.data(postcodesgeo)
	.enter().append("path")
	.attr("class", "feature")
	.attr("id", function (d, i) {
	// Here we can compute "id" using datums
	console.log(d);
	return i;
	})
	.attr("d", path);

	loading.remove();

	svg.append("rect")
	.attr("x", 0)
	.attr("y", 0)
	.attr("height", 50)
	.attr("width", width)
	.style("fill", "white");

	svg.append("line")
	.attr("class", "divider")
	.attr("x1", 0)
	.attr("x2", width)
	.attr("y1", 51)
	.attr("y2", 51);

	var legends = svg.append("g").attr("class", "legends");

	svg.selectAll("text.legend")
	.data([0,1,2,3,4,5,6,7,8,9])
	.enter().append("text")
	.attr("class", "legend")
	.attr("y", 25)
	.attr("x", function(d) { return width - (10 - d) * 50 + 25; })
	.style("fill", "white")
	.attr("dy", ".35em")
	.attr("text-anchor", "middle")
	.style("font-size", 20)
	.text(String);

	var prefix = "POA";
	var selectedPostcode;

	change();

	function updateLegend(legend) {
	var container = legends.selectAll("rect.legend")
	.data(legend, function(d) { return d; });

	container
	.transition().duration(750)
	.attr("x", function(d) { return width - (10 - d) * 50; })
	.style("fill", function(d) { return color(d); })
	.attr("y", 0);

	container.enter().append("rect")
	.attr("class", "legend")
	.attr("y", -50)
	.attr("width", 50)
	.attr("height", 50)
	.attr("x", function(d) { return width - (10 - d) * 50; })
	.transition()
	.duration(750)
	.ease("bounce")
	.style("fill", function(d) { return color(d); })
	.attr("y", 0);

	container.exit().transition().duration(400)
	.ease("backs")
	.attr("y", -50)
	.remove();

	}

	function setFoundStyle(selection, postcode) {
	selection.style("fill", color(postcode.slice(-1)));
	}

	function unzoom(selection) {
	selection.transition().duration(750).attr("transform", "");
	}

	function zoom(selection, b, maxScale) {
	var scale = 0.95 / Math.max((b[1][0] - b[0][0]) / width, (b[1][1] - b[0][1]) / height);
	var usedScale = Math.min(scale, maxScale);
	selection.transition().duration(750).attr("transform",
	"translate(" + projection.translate() + ")" +
	"scale(" + usedScale + ")" +
	"translate(" + -(b[1][0] + b[0][0]) / 2 + "," + -(b[1][1] + b[0][1]) / 2 + ")");
	}

	function change() {
	var lastPostcode = selectedPostcode;
	selectedPostcode = input.property("value");
	if (lastPostcode === selectedPostcode) {
	return;
	}

	var shouldUnzoom = selectedPostcode === "";
	var shouldZoom = selectedPostcode.match(/\d{1,4}/);

	if (!shouldUnzoom && !shouldZoom) {
	return;
	}

	var matchString = prefix + selectedPostcode;
	var findBounds = findMinMaxBounds();
	var bounds;
	var legendObj = {};
	var matching = feature.filter(function(d) {
	var match = matchingFeature(d, matchString);
	var next = nextDigit(d, matchString);
	this.style.fill = match ? color(+next) : "#222";
	if (match) {
	if (next) { legendObj[+next] = true; }
	bounds = findBounds(path.bounds(d));
	}
	return match;
	});

	updateLegend(d3.keys(legendObj).map(function(d) { return +d; }));
	if (matching[0].length === 0) { return; }
	if (selectedPostcode.length === 4 && matching[0].length === 1) { matching.call(setFoundStyle, matchString); }

	var zoomers = function() {
	if (shouldZoom) { g.call(zoom, bounds, 100); }
	if (shouldUnzoom) { g.call(unzoom); }
	};
	setTimeout(zoomers, 0);

	}

	function nextDigit(feature, string) {
	return feature.id.charAt(string.length);
	}

	function matchingFeature(feature, string) {
	return feature.id.indexOf(string) !== -1;
	}

	function findMinMaxBounds() {
	var topBound = -Infinity;
	var rightBound = -Infinity;
	var bottomBound = Infinity;
	var leftBound = Infinity;
	return function (bound) {
	leftBound = Math.min(bound[0][0], leftBound);
	bottomBound = Math.min(bound[0][1], bottomBound);
	rightBound = Math.max(bound[1][0], rightBound);
	topBound = Math.max(bound[1][1], topBound);
	return [[leftBound, bottomBound], [rightBound, topBound]];
	};
	}
	});

	d3.select(self.frameElement).style("height", height + "px");
	</script>