README.md

## README.md

      
          Raw
        
        
              README.md
            
          
    Built with blockbuilder.org

forked from jalapic's block: network fade

  
## index.html
<!DOCTYPE html>
<meta charset="utf-8">
 <script src="https://cdnjs.cloudflare.com/ajax/libs/d3/3.5.5/d3.min.js"></script>
 <script src="http://marvl.infotech.monash.edu/webcola/cola.v3.min.js"></script>
 <script type="text/javascript" src="http://mbostock.github.com/d3/d3.geom.js"></script>
 <script type="text/javascript" src="http://mbostock.github.com/d3/d3.layout.js"></script>

<style>

.node circle {
  stroke-width: 2px;
}

.node text {
  font-family: sans-serif;
  text-anchor: middle;
  pointer-events: none;
  user-select: none;
  -webkit-user-select: none;
}

.link {
  stroke-width: 4px;
}


text {
  font: 18px sans-serif;
  pointer-events: none;
}

#end-arrow {
  fill: #88A;
}


</style>
<body>


<script>


  function bar() {
  console.log("click");
  force.stop();
  force.start();
}


  var links = [
  {source: "A", target: "D", type: "high"},
  {source: "A", target: "K", type: "high"},
  {source: "B", target: "G", type: "high"},
  {source: "H", target: "B", type: "high"},
  {source: "C", target: "A", type: "low"},
  {source: "C", target: "L", type: "low"},
  {source: "E", target: "A", type: "low"},
  {source: "F", target: "B", type: "low"},
  {source: "F", target: "G", type: "low"},
  {source: "K", target: "J", type: "low"},
  {source: "F", target: "I", type: "low"},
  {source: "G", target: "H", type: "low"},
  {source: "E", target: "K", type: "high"},
  {source: "E", target: "G", type: "low"},
  {source: "E", target: "F", type: "high"},
  {source: "E", target: "M", type: "high"},
];

var nodes = {};

// Compute the distinct nodes from the links.
links.forEach(function(link) {
  link.source = nodes[link.source] || (nodes[link.source] = {name: link.source});
  link.target = nodes[link.target] || (nodes[link.target] = {name: link.target});
});

var width = 960,
    height = 700;

var force = d3.layout.force()
    .nodes(d3.values(nodes))
    .links(links)
    .size([width, height])
    .linkDistance(105)
    .charge(-775)
    .on("tick", tick)
    .start();


force.on("start", function () {
    console.log("start");
});
force.on("end", function () {
    console.log("end");
});

R=18


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

// add defs-marker
// add defs-markers
svg.append('svg:defs').selectAll("marker")
    .data([{id:"end-arrow", opacity:1}, {id:"end-arrow-fade", opacity:0.075}])
  .enter().append('marker')
    .attr('id', function(d) { return d.id; })
    .attr('viewBox', '0 0 10 10')
    .attr('refX', 2+R)
    .attr('refY', 5)
    .attr('markerWidth', 4)
    .attr('markerHeight', 4)
    .attr('orient', 'auto')
  .append('svg:path')
    .attr('d', 'M0,0 L0,10 L10,5 z')
    .style("opacity", function(d) { return d.opacity; });

//phantom marker
  svg.append('svg:defs')
    .append('svg:marker')
    .attr('id', 'end-arrow-phantom')
    .attr('viewBox', '0 0 10 10')
    .attr('refX', 2+R)
    .attr('refY', 5)
     .attr('markerWidth', 4)
     .attr('markerHeight', 4)
    .attr('orient', 'auto')
    .attr('fill', '#EEE')
    .append('svg:path')
    .attr('d', 'M0,0 L0,10 L10,5 z');


var link = svg.selectAll(".link")
    .data(force.links())
    .enter()
    .append("line")
    .attr("class", "link")
    .attr("stroke", "#88A")
    .attr('marker-end', 'url(#end-arrow)')
    .on("mouseout", fade(1))
;

var node = svg.selectAll(".node")
    .data(force.nodes())
    .enter().append("g")
    .attr("class", "node")
    .call(force.drag);

node.append("circle")
    .attr("r", R)
    .attr("stroke", '#777')
    .attr("fill", '#DDD')
    .on("mouseover", fade(.1))
    .on("mouseout", fade(1))

;

node.append("text")
    .attr("x", 0)
    .attr("dy", ".35em")
    .text(function(d) { return d.name; });


function tick() {
  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("transform", function(d) { return "translate(" + d.x + "," + d.y + ")"; });
}


   var linkedByIndex = {};
    links.forEach(function(d) {
        linkedByIndex[d.source.index + "," + d.target.index] = 1;
    });

    function isConnected(a, b) {
        return linkedByIndex[a.index + "," + b.index] || linkedByIndex[b.index + "," + a.index] || a.index == b.index;
    }

 function fade(opacity) {
        return function(d) {

            node.style("stroke-opacity", function(o) {
                thisOpacity = isConnected(d, o) ? 1 : opacity;
                this.setAttribute('fill-opacity', thisOpacity);
                return thisOpacity;
            });


          link.style("stroke-opacity", function(o) {
                return opacity === 1 ||  o.source === d || o.target === d ? 1 : opacity/2;
            });


            link.attr("marker-end", function(o) {
                return opacity === 1 || o.source === d || o.target === d ? 'url(#end-arrow)' : 'url(#end-arrow-phantom)';
            });


        };
 }


</script>