D3 Examples - GEXFD3 with Canvas

GEXFD3 with Canvas
This is an example of using GEXDFD3 to host an interactive version of a dynamic k-partite network. It's still a very rough little library and feature requests and bug reports are welcome.
Simply replace cosit.gexf with your own gexf.
If it has a dynamic attribute (in this case the "startyr" column) then you can brush the network by modifying the .dynamicAttribute() setting in the index where gexfD3 is set up.
If you have a k-partite network, ensure that the types of nodes are in a "type" column and multimodal network projection buttons will automatically be created.
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<html xmlns="https://www.w3.org/1999/xhtml">
<head>
  <title>GEXF D3 w/ Dynamic Brushing and Reprojecting and Canvas Edges</title>
  <meta charset="utf-8" />
  <link type="text/css" rel="stylesheet" href="gexfd3.css" />
</head>
<script src="https://d3js.org/d3.v3.min.js"></script>
<script src="https://d3js.org/colorbrewer.v1.min.js"></script>
<script src="parser.js" type="text/javascript">
</script>
<script src="gexfd3.js" type="text/javascript">
</script>
<body onload="loadGraph('cosit.gexf')">
​
<div id="vizcontainer" style="width:100%;height:100%">
<canvas style="background: white;1000px;width:1000px;position:absolute;z-index:-1;" height=1000 width=1000></canvas>
<svg id="graphSVG" style="border:1px lightgray solid;">
  <g id="graphG" />
<div id="modal"><div id="content"></div><button id="modalClose" onclick="nodeFocus=false;nodeOut();d3.select('#modal').style('display','none');">X</button></div>
</div>
<div id="controls">
</div>
<div id="brushDiv"><svg style="width:100%;height:50px;"><g id="brushG" class="brush"></g></svg></div>
  <footer>
<script>
  nodeFocus = false;
  currentBrush =[0,0];
  docHash = {};
  allLinks = [];
  currentScale = 0;
​
  
  function loadGraph(sourceGEXF) {
    newGEXF = GexfParser.fetch(sourceGEXF);
​
    gD3 = gexfD3().graph(newGEXF).size([1000,1000]).dynamicAttribute("centrality");
​
    force = d3.layout.force()
      .charge(-200)
      .linkDistance(50)
      .size([1000, 1000])
      .gravity(.1)
      .on("tick", redrawGraph)
​
    d3.select("#brushG").call(gD3.dynamicBrush);
    gD3.dynamicBrush().on("brush", brushMove);
​
    zoom = d3.behavior.zoom()
    .scaleExtent([.1, 10])
    .on("zoom", zoomed);
​
    allLinks = gD3.links();
    for (x in allLinks) {
      allLinks[x]["highlighted"] = false;
    }
​
    brushMove();
    d3.select("svg").call(zoom);
    createControls();
    zoomed();
​
  }
      
      function highlightNeighbors(d,i) {
        var nodeNeighbors = findNeighbors(d,i);
        d3.selectAll("g.node").each(function(p) {
          var isNeighbor = nodeNeighbors.nodes.indexOf(p);
          d3.select(this).select("circle")
          .style("opacity", isNeighbor > -1 ? 1 : .25)
          .style("stroke-width", isNeighbor > -1 ? 3 : 1)
          .style("stroke", isNeighbor > -1 ? "blue" : "white")
        })
        nodeNeighbors.links.forEach(function (link){
          link.highlighted = true;
        })
        redrawGraph();
      }
      
      function findNeighbors(d,i) {
        neighborArray = [d];
        var linkArray = [];
        filteredLinks.filter(function(p) {return p.source == d || p.target == d}).forEach(function(p) {
          neighborArray.indexOf(p.source) == -1 ? neighborArray.push(p.source) : null;
          neighborArray.indexOf(p.target) == -1 ? neighborArray.push(p.target) : null;
          linkArray.push(p);
        })
        return {nodes: neighborArray, links: linkArray};
      }
​
    function zoomed() {
    force.stop();
    var canvWidth = parseInt(d3.select("#vizcontainer").style("width"));
    var canvHeight = parseInt(d3.select("#vizcontainer").style("height"));
      var canvasTranslate = zoom.translate();
        currentScale = zoom.scale();
        var halfCanvas = canvHeight / 2;
        var zoomLevel = halfCanvas * currentScale;
        gD3.xScale().range([(halfCanvas - zoomLevel) + canvasTranslate[0], (halfCanvas + zoomLevel) + canvasTranslate[0]]);
        gD3.yScale().range([(halfCanvas + zoomLevel) + canvasTranslate[1], (halfCanvas - zoomLevel) + canvasTranslate[1]]);
        redrawGraph();
    }
    
    function createControls() {
      d3.select("#controls").append("button").attr("class", "origButton topology").html("Force On").on("click", function() {
      force.start();})
      d3.select("#controls").append("button").attr("class", "origButton topology").html("Force Off").on("click", function() {
      force.stop();})
      d3.select("#controls").append("button").attr("class", "origButton topology").html("Reset Layout").on("click", function() {
      force.stop();
      gD3.nodes().forEach(function (el) {el.x = el.originalX;el.px = el.originalX;el.y = el.originalY;el.py = el.originalY;});
      currentBrush = [0,0];
      brushMove();
      redrawGraph();
      })
​
​
      d3.select("#controls").append("button").attr("class", "origButton projection").html("N-Partite").on("click", function() {
        collapseNetwork("base");
      })
      d3.select("#controls").selectAll("button.networkProjectionButton").data(
        d3.set(gD3.nodes().map(function(el) {return el.properties.type})).values()
        )
      .enter()
      .append("button")
      .attr("class", "networkProjectionButton projection")
      .on("click", function(d) {collapseNetwork(d)})
      .html(function(d) {return d + " Only"});
      
            d3.select("#controls").append("button").attr("class", "origButton node-appearance").html("Reset Colors").on("click", function() {
      var sizeScale = gD3.nodeScale();
      d3.selectAll("circle")
      .attr("r", function (d) {return sizeScale(d.size)})
      .style("fill", function(d) {return d.rgbColor})
      .style("opacity", 1);
      })
            
      d3.select("#controls").selectAll("button.nodeButtons").data(gD3.nodeAttributes())
      .enter()
      .append("button")
      .attr("class", "nodeButtons node-appearance")
      .on("click", nodeButtonClick)
      .html(function(d) {return d});
​
      d3.select("#controls").selectAll("button.linkButtons").data(gD3.linkAttributes())
      .enter()
      .append("button")
      .attr("class", "linkButtons node-appearance")
      .on("click", linkButtonClick)
      .html(function(d) {return d});
​
    }
    
    function nodeButtonClick(d,i) {
      var nodeAttExtent = d3.extent(filteredNodes, function(p) {return parseFloat(p.properties[d])});
      var colorScale = d3.scale.quantize().domain(nodeAttExtent).range(colorbrewer.YlGnBu[6]);
      d3.selectAll("circle").style("fill", function(p) {return colorScale(p.properties[d])}).style("opacity", 1)
    }
    function linkButtonClick(d,i) {
      var linkAttExtent = d3.extent(filteredLinks, function(p) {return parseFloat(p.properties[d])});
      var colorScale = d3.scale.quantize().domain(linkAttExtent).range(colorbrewer.YlGnBu[6]);
      d3.selectAll("line").style("stroke", function(p) {return colorScale(p.properties[d])}).style("opacity", 1)      
    }
    
    function redrawGraph() {
      var xScale = gD3.xScale();
      var yScale = gD3.yScale();
​
     var context = d3.select("canvas").node
​
      var canvas = d3.select("canvas").node();
      var context = canvas.getContext("2d");
      context.clearRect (0,0,canvas.width,canvas.height);
​
  context.lineWidth = 1;
  context.strokeStyle = "rgba(0, 0, 0, 0.5)";
​
  filteredLinks.forEach(function (link) {
  context.beginPath();
  context.moveTo(xScale(link.source.x),yScale(link.source.y))
  context.lineTo(xScale(link.target.x),yScale(link.target.y))
  context.stroke();
      })
​
  context.lineWidth = 2;
  context.strokeStyle = "rgba(0, 255, 122, 0.75)";
​
  filteredLinks.filter(function (d) {return d.highlighted}).forEach(function (link) {
  context.beginPath();
  context.moveTo(xScale(link.source.x),yScale(link.source.y))
  context.lineTo(xScale(link.target.x),yScale(link.target.y))
  context.stroke();
      })
  
      d3.selectAll("g.node")
      .attr("transform", function(d) {return "translate(" + xScale(d.x) + "," + yScale(d.y) + ")"});
    }
    
    function collapseNetwork(collapseVector) {
    currentBrush = [0,0];
    dAtt = gD3.dynamicAttribute();
    if (collapseVector == "base") {
      gD3.links(allLinks);
      brushMove();
      return;
    }
    newLinks = [];
     for (x in allLinks) {
      if (allLinks[x].source.properties.type == collapseVector) {
        for (y in allLinks) {
          if (allLinks[y].source.properties.type == collapseVector) {
          if (allLinks[y].target == allLinks[x].target && (allLinks[y].properties[dAtt] || allLinks[y].source.properties[dAtt])  == (allLinks[x].properties[dAtt] || allLinks[x].source.properties[dAtt])) {
            var newLink = {id: collapseVector + newLinks.length, source: allLinks[x].source, target: allLinks[y].source, properties: {}};
            if (gD3.linkAttributes().indexOf(dAtt) > -1) {
              newLink.properties[dAtt] = allLinks[x].properties[dAtt];
            }
            else if (gD3.nodeAttributes().indexOf(dAtt) > -1) {
              newLink.properties[dAtt] = allLinks[y].target.properties[dAtt];              
            }
            newLinks.push(newLink);
            }
          }
        }        
      }
      else if (allLinks[x].target.properties.type == collapseVector) {
        for (y in allLinks) {
          if (allLinks[y].target.properties.type == collapseVector) {
          if (allLinks[y].source == allLinks[x].source && (allLinks[y].properties[dAtt] || allLinks[y].target.properties[dAtt])  == (allLinks[x].properties[dAtt] || allLinks[x].target.properties[dAtt])) {
            var newLink = {id: collapseVector + newLinks.length, source: allLinks[x].target, target: allLinks[y].target, properties: {}};
            if (gD3.linkAttributes().indexOf(dAtt) > -1) {
              newLink.properties[dAtt] = allLinks[x].properties[dAtt];
            }
            else if (gD3.nodeAttributes().indexOf(dAtt) > -1) {
              newLink.properties[dAtt] = allLinks[y].source.properties[dAtt];              
            }
            newLinks.push(newLink);
            }
          }
        }
      }
     }
     console.log(newLinks)
     gD3.links(newLinks);
     brushMove();
     redrawGraph();
    }
​
    function brushMove() {
      var s = gD3.dynamicBrush().extent();
      var dAtt = gD3.dynamicAttribute();
      var xScale = gD3.xScale();
      var yScale = gD3.yScale();
      var sizeScale = gD3.nodeScale();
      
      if (Math.ceil(s[0]) == currentBrush[0] && Math.floor(s[1]) == currentBrush[1]) {
        return;
      }
      else {
        currentBrush[0] = Math.floor(s[0]);
        currentBrush[1] = Math.ceil(s[1]);
      }
​
      var forceRunning = false;
      if (force.alpha() > 0) {
        force.stop();
        forceRunning = true;
      }
      
​
      if (typeof gD3.links()[0].properties["startyr"] != "undefined") {
      filteredLinks = gD3.links().filter(function (d) {return d.properties[dAtt] == 0 || (d.properties[dAtt] >= currentBrush[0] && d.properties[dAtt] <= currentBrush[1])});
      sourceNodes = filteredLinks.map(function (el) {return el.source});
      targetNodes = filteredLinks.map(function (el) {return el.target});
      filteredNodes = gD3.nodes().filter(function (d) {return sourceNodes.indexOf(d) > -1 || targetNodes.indexOf(d) > -1});
      }
      else {
        filteredLinks = gD3.links();
        filteredNodes = gD3.nodes();
      }
      if (gD3.nodeAttributes().indexOf(dAtt) > -1) {
        filteredNodes = filteredNodes.filter(function (d) {return d.properties[dAtt] == 0 || (d.properties[dAtt] >= currentBrush[0] && d.properties[dAtt] <= currentBrush[1])});
        nodeIDs = filteredNodes.map(function (el) {return el.id})
        filteredLinks = filteredLinks.filter(function (d) {return nodeIDs.indexOf(d.source.id) > -1 && nodeIDs.indexOf(d.target.id) > -1})
      }
​
      d3.select("#graphG").selectAll("g.node").data(filteredNodes, function (d) {return d.id})
      .enter()
      .append("g")
      .attr("class", "node")
      .attr("transform", function(d) {return "translate(" + xScale(d.x) + "," + yScale(d.y) + ")"})
      .on("mouseover", nodeOver)
      .on("mouseout", nodeOut)
      .on("click", nodeClick)
      .append("circle")
      .attr("r", 5)
      .style("fill", function(d) {return d.rgbColor})
      .style("stroke", "black")
      .style("stroke-width", "1px")
      .style("stroke-opacity", 1);
​
      d3.selectAll("g.node").data(filteredNodes, function (d) {return d.id})
      .exit()
      .remove();
​
      force
      .nodes(filteredNodes)
      .links(filteredLinks);
​
      force.start();
      
      var maxWeight = d3.max(filteredNodes, function(d) {return d.weight || 0});
      
      if (maxWeight > 0) {
        var nodeScale = d3.scale.linear().domain([1,maxWeight]).range([2,10]).clamp(true);
        d3.selectAll("g.node").select("circle").attr("r", function(d) {return nodeScale(d.weight) || 0});
      }
​
      if (!forceRunning) {
        force.stop();
      }
      
        function nodeOver(d,i,e) {
        var el = this;
        if (!d3.event.fromElement) {
          el = e;
        }
        if (nodeFocus) {
          return;
        }
        //Only do the element stuff if this came from mouseover
        el.parentNode.appendChild(el);
        d3.select(el).append("text").attr("class", "hoverLabel").attr("stroke", "white").attr("stroke-width", "5px")
        .style("opacity", .9)
        .style("pointer-events", "none")
        .text(d.label);
        
        d3.select(el).append("text").attr("class", "hoverLabel")
        .style("pointer-events", "none")
        .text(d.label);
        highlightNeighbors(d,i);
      }
​
      function nodeClick(d,i) {
        nodeFocus = false;
        nodeOut();
        nodeOver(d,i,this);
        nodeFocus = true;
        var newContent = "<p>" + d.label + "</p>";
        newContent += "<p>Attributes: </p><p><ul>";
        for (x in gD3.nodeAttributes()) {
          newContent += "<li>" + gD3.nodeAttributes()[x] + ": " + d.properties[gD3.nodeAttributes()[x]]+ "</li>";          
        }
        newContent += "</ul></p><p>Connections:</p><ul>";
        var neighbors = findNeighbors(d,i);
        for (x in neighbors.nodes) {
          if (neighbors.nodes[x] != d) {
            newContent += "<li>" + neighbors.nodes[x].label + "</li>";
          }
        }
        newContent += "</ul></p>";
        
        d3.select("#modal").style("display", "block").select("#content").html(newContent);
      }
      redrawGraph();
    }
​
  
      function createAnonymousEdgeTable() {
      var htmlTable = "source,target,year<br>";
      for (x in gD3.links()) {
        htmlTable+=gD3.links()[x].source.properties.type + "-" + gD3.nodes().indexOf(gD3.links()[x].source) + "," + gD3.links()[x].target.properties.type + "-" + gD3.nodes().indexOf(gD3.links()[x].target) + "," + gD3.links()[x].properties.year;
        htmlTable+="<br>";
      }
      d3.select("#content").html(htmlTable)
      
    
    }
    
          function nodeOut() {
        if (nodeFocus) {
          return;
        }
​
        d3.selectAll(".hoverLabel").remove();
        d3.selectAll("circle").style("opacity", 1).style("stroke", "black").style("stroke-width", "1px");
        filteredLinks.forEach(function (link) {link.highlighted = false});
        redrawGraph();
      }
    
​
</script>
  </footer>
</body>
</html>
    