ffmap-backend/html/force.js

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2012-05-12 17:06:00 +02:00
function getOffset( el ) {
var _x = 0;
var _y = 0;
while( el && !isNaN( el.offsetLeft ) && !isNaN( el.offsetTop ) ) {
_x += el.offsetLeft - el.scrollLeft;
_y += el.offsetTop - el.scrollTop;
el = el.offsetParent;
}
return { top: _y, left: _x };
}
var offset = getOffset(document.getElementById('chart'));
var w = window.innerWidth - offset.left,
h = window.innerHeight - offset.top,
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fill = d3.scale.category20();
var vis = d3.select("#chart").append("svg")
.attr("width", w)
.attr("height", h);
d3.json("nodes.json", function(json) {
var force = d3.layout.force()
.charge(-350)
.gravity(0.05)
.friction(0.75)
.theta(0.1)
.linkDistance(function (d) { return d.distance; })
.linkStrength(function (d) { return d.strength; })
.nodes(json.nodes)
.links(json.links)
.size([w, h])
.start();
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  var linkedByIndex = {};
  json.links.forEach(function(d) {
      linkedByIndex[d.source.index + "," + d.target.index] = 1;
  });
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var link = vis.selectAll("line.link")
.data(json.links)
.enter().append("line")
.attr("class", "link")
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.style("stroke-width", function(d) { return Math.min(1, d.strength * 2); })
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.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; });
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function highlight_nodes(f) {
return function (e, i) {
d3.select(this).classed("highlight", f);
        var links = vis.selectAll("line").filter(function(d) {
                return d.source.index == i || d.target.index == i;
            }).each(function(dLink, iLink) {
                d3.select(this).classed("highlight", f);
            });
}
}
    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 o.source === d || o.target === d ? 1 : opacity;
            });
        };
    }
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var node = vis.selectAll("svg.node")
.data(json.nodes)
.enter().append("g")
.attr("class", "node")
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.on("mouseover", fade(.1))//highlight_nodes(true))
.on("mouseout", fade(1))//highlight_nodes(false))
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.call(force.drag);
node.append("ellipse")
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.attr("rx", function(d) { if (d.group == 3) return 4; else return Math.max(10, d.name.length * 5); })
.attr("ry", function(d) { if (d.group == 3) return 4; else return 10; })
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.style("fill", function(d) { if (d.group == 3) return fill(d.group); else return ""; })
.style("stroke", function(d) { return fill(d.group); });
node.append("text")
.attr("text-anchor", "middle")
.attr("y", "4px")
.text(function(d) { if (d.group == 3) return ""; else return d.name; });
node.append("title")
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.text(function(d) { return d.macs; });
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force.on("tick", function() {
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 + ")"; });
});
});