D3 Examples - keyboardviz

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<!DOCTYPE html>
<meta charset="utf-8">
<style>
​
.link {
  stroke: black;
}
.node {
  stroke: black;
}
.label {
  font-size: 12px;
  color: white;
}
  
​
</style>
<svg width="1000" height="500"></svg>
<script src="https://d3js.org/d3.v4.min.js"></script>
<script>
​
var svg = d3.select("svg"),
    width = +svg.attr("width"),
    height = +svg.attr("height");
​
var color = d3.scaleOrdinal(d3.schemeCategory20);
var xScale = d3.scaleLinear().domain([0, 1]).range([0, 600]);
​
var simulation = d3.forceSimulation()
    .force("link", d3.forceLink().distance(70).id(function(d) { return d.id; }))
    .force("charge", d3.forceManyBody())
    .force('y', d3.forceY().y(function(d) {
      if ('QWERTYUIOP'.includes(d.id)) {
        return 0;
      } else if ('ASDFGHJKL'.includes(d.id)) {
        return 300;
      } else {
        return 400;
      }
    }))
    .force("center", d3.forceCenter(width / 2, height / 2));
  
d3.select("circle")
    
​
d3.json("data.json", function(error, graph) {
  if (error) throw error;
​
  var link = svg.append("g")
    .attr("class", "link")
    .selectAll("line")
    .data(graph.links)
    .enter().append("line")
​
  var nodeData = svg.append("g")
    .selectAll("circle")
    .attr("class", "node")
    .data(graph.nodes).enter();
  
  var node = nodeData.append("circle")
    .attr("r", 15)
    .attr("id", function(d) {return 'node'+d.id})
    .attr('fixed', true)
    .attr("py", function(d) {
​
    })
    .attr("fill", function(d) { return color(d.group); })
        .call(d3.drag()
      .on("start", dragstarted)
      .on("drag", dragged)
      .on("end", dragended));
​
  var label = svg.selectAll()
    .data(graph.nodes).enter()
    .append("text")
    .attr("class", "label")
    .text(function (d) { return d.id; })
    .style("text-anchor", "middle")
    .style("fill", "white")
    .style("font-family", "Arial")
    .style("font-size", 12)
    .call(d3.drag()
      .on("start", dragstarted)
      .on("drag", dragged)
      .on("end", dragended));
​
  d3.select("body").on("keydown", keyPress)
​
​
  simulation
      .nodes(graph.nodes)
      .on("tick", ticked);
​
  simulation.force("link")
      .links(graph.links);
​
  function ticked() {
    link
        .attr("x1", function(d) { return d.source.x; })
        .attr("y1", function(d) { return d.source.y; })
        .attr("x2", function(d) { return d.target.x; })
        .attr("y2", function(d) { return d.target.y; });
​
    node
        .attr("cx", function(d) { return d.x;})
        .attr("cy", function(d) { return d.y; });
    
    label
        .attr("x", function(d) { return d.x;})
        .attr("y", function(d) { return d.y; });
  }
});
​
​
function keyPress() {
  var key = d3.event && d3.event.key && d3.event.key.toUpperCase();
  if (key) {
    var node = d3.select('#node' + key);
    if (node) {
      console.log(node);
        var oldr = parseInt(node.attr("r"));
        d3.select('#node' + key).attr("r",oldr+1);
    }
  }
}
  
function dragstarted(d) {
  if (!d3.event.active) simulation.alphaTarget(0.3).restart();
  d.fx = d.x;
  d.fy = d.y;
}
​
function dragged(d) {
  d.fx = d3.event.x;
  d.fy = d3.event.y;
}
​
function dragended(d) {
  if (!d3.event.active) simulation.alphaTarget(0);
  d.fx = null;
  d.fy = null;
}
​
</script>
    