Old school D3 from simpler times

All examples By author By category About

qaisarmehmood

Full window Github gist

dragFinal

Built with blockbuilder.org

<!DOCTYPE html>
<meta charset="utf-8">
<title>Cancer Incident Average In state of Texas</title>

<style>
  svg {
  background-color: #4682b4;
}
.line {
  fill: none;
  stroke: black;
  stroke-width: 1px;
  }
  .tooltip {
  position: absolute;
  visibility: visible;
  background-color: #aaa;
  padding: 5px;
}
/* This style is used when dragging the dot */
.active {
  stroke: #000;
  stroke-width: 2px;
}
}
</style>
<script src="https://d3js.org/d3.v4.min.js"></script>
<script src="https://d3js.org/topojson.v2.min.js"></script>
<script src="https://d3js.org/d3-scale-chromatic.v1.min.js"></script>
<body>
<script>
var width = 960;
var height = 500;
// Set the map projection centered on Texas
var projection = d3.geoMercator()
      .scale(2000)
      .center([-98.90, 31.96]);
var path = d3.geoPath()
      .pointRadius(1)
      .projection(projection);
    //projection.fitSize([width, height], object);
 
  
var svg = d3.select("body").append("svg")
      .attr("width", width)
      .attr("height", height);
  
   var layer2 = svg.append("g");
// Threshold colors scale
var threshold = d3.scaleThreshold()
      .domain([1, 10, 50, 200, 800, 2000, 5000, 10000])
      .range(d3.schemeOrRd[9]);
 // 1. NEW: Define an array with Washington DC longitude & latitude
var dc = [-99.90, 31.96]; 
  // 2. NEW: Add an HTML <div> element that will function as the tooltip
var tooltip = d3.select('body').append('div')
    .attr('class', 'tooltip')
    .text('Hello, world!')
// Add a legend
var legend = layer2.selectAll('.legend')
    	.data(d3.range(10))
  .enter().append('g')
      .attr('class', 'legend')
      .attr('transform', 'translate(' + [width - 150, height / 2] +')');
		legend.append('circle')
      .attr('cy', function(d) { return 4 * d * path.pointRadius() ; })
      .attr('r', path.pointRadius())
      //.attr('fill', color)
    	.attr('stroke', '#aaaaaa')
		legend.append('text')
      .attr('x', '1em')
      .attr('y', function(d) { return 4 * d * path.pointRadius(); })
      .attr('dy', '.3em')
      .text(function(d) { return d + ' - ' + (d + 1); })
// Set the variables containing URLs for the data
var url = "https://raw.githubusercontent.com/TNRIS/tx.geojson/master/counties/tx_counties.geojson";
var TEX = "https://raw.githubusercontent.com/li01012/classes/master/Project/Final_Texas_Data.csv";
// NEW: Load the data with d3.queue()
d3.queue()
    .defer(d3.json, url)
    .defer(d3.csv, TEX)
    .await(ready);
// NEW: processing both data sources in the single function "ready"
function ready(error, tx, csv) {
  if (error) console.log(error);
  // Look at these in the developer console
  console.log("csv[0]", csv[0])
  console.log("tx.features", tx.features[0])
  // Create a d3.map() that will be used to query CSV data by county FIPS
  var data = d3.map();
  csv.forEach(function(d) { data.set(d.FIPS, d)})
  svg.append("g").selectAll("path")
      .data(tx.features)
  	.enter().append ("path")
      .attr("d", path)
      .style("fill", function(d) { return threshold(data.get(d.properties.FIPS).Average_An); });
  addLegend();
  
 
}
function addLegend() {
  var formatNumber = d3.format("d");
  var x = d3.scalePow().exponent('.15')
      .domain([1, 80000])
      .range([0, 300]);
  var xAxis = d3.axisBottom(x)
      .tickSize(13)
      .tickValues(threshold.domain())
  		.tickFormat(formatNumber)
  var g = svg.append("g")
      .attr('transform', 'translate(3, 50)')
      .call(xAxis);
  g.select(".domain")
      .remove();
  g.selectAll("rect")
    .data(threshold.range().map(function(color) {
      var d = threshold.invertExtent(color);
      if (d[0] == null) d[0] = x.domain()[0];
      if (d[1] == null) d[1] = x.domain()[1];
      return d;
    }))
    .enter().insert("rect", ".tick")
      .attr("height", 12)
      .attr("x", function(d) { return x(d[0]); })
      .attr("width", function(d) { return x(d[1]) - x(d[0]); })
      .attr("fill", function(d) { return threshold(d[0]); });
  g.append("text")
      .attr("fill", "#000")
      .attr("font-weight", "bold")
      .attr("text-anchor", "start")
      .attr("y", -6)
      .text("No.of Cancer Incidents");
}
    
   // 3. NEW: Add a draggable circle to the map
  // See: https://bl.ocks.org/mbostock/22994cc97fefaeede0d861e6815a847e)
 
  layer2.append("circle")
      .attr("class", "dc")
      .attr("cx", projection(dc)[0])
      .attr("cy", projection(dc)[1])
      .attr("r", 10)
      .style("fill", "yellow")  // Make the dot yellow
      .call(d3.drag()           // Add the drag behavior
        .on("start", dragstarted)
        .on("drag", dragged)
        .on("end", dragended));
  // NEW: The following 3 functions define what happens during drag events
// See https://bl.ocks.org/mbostock/22994cc97fefaeede0d861e6815a847e for a simpler d3-drag demo
function dragstarted(d) {
  // Highlight the circle that's being dragged
  d3.select(this).classed("active", true);
  // Make the tooltip visible during drag events
  tooltip.style("visibility", "visible");
}
function dragged(d) {
  // Reposition the circle to follow the mouse during drag
  d3.select(this).attr("cx", d3.event.x).attr("cy", d3.event.y);
  // Reposition the tooltip too
  tooltip.style("left", (d3.event.x - 30) + "px").style("top", (d3.event.y - 50) + "px");
  // Add the name of the state to the tooltip
  layer1.selectAll('path')
      .filter(function(d) { return d3.geoContains(d, projection.invert([d3.event.x, d3.event.y])) })
      .each(function(d) { tooltip.html(d.properties.name); })
}
function dragended(d) {
  // Eliminate the highlight when dragging ends
  d3.select(this).classed("active", true);
  // Hide the tooltip
  tooltip.style("visibility", "hidden");
}
function mousemoved() {
  info.text(formatLocation(projection.invert(d3.mouse(this)), projection.scale()));
}
function formatLocation(p, k) {
  var format = d3.format("." + Math.floor(Math.log(k) / 2 - 2) + "f");
  return (p[1] < 0 ? format(-p[1]) + "°S" : format(p[1]) + "°N") + " "
       + (p[0] < 0 ? format(-p[0]) + "°W" : format(p[0]) + "°E");
}

</script>

https://d3js.org/d3.v4.min.js

https://d3js.org/topojson.v2.min.js

https://d3js.org/d3-scale-chromatic.v1.min.js