highlight nodes on hover
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682e73e737
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@ -32,20 +32,58 @@ d3.json("nodes.json", function(json) {
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.size([w, h])
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.start();
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var linkedByIndex = {};
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json.links.forEach(function(d) {
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linkedByIndex[d.source.index + "," + d.target.index] = 1;
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});
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var link = vis.selectAll("line.link")
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.data(json.links)
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.enter().append("line")
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.attr("class", "link")
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.style("stroke-width", function(d) { return Math.min(1, d.strength * 2); })
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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; })
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.attr("y1", function(d) { return d.source.y; })
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.attr("x2", function(d) { return d.target.x; })
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.attr("y2", function(d) { return d.target.y; });
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function highlight_nodes(f) {
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return function (e, i) {
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d3.select(this).classed("highlight", f);
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var links = vis.selectAll("line").filter(function(d) {
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return d.source.index == i || d.target.index == i;
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}).each(function(dLink, iLink) {
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d3.select(this).classed("highlight", f);
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});
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}
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}
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function isConnected(a, b) {
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return linkedByIndex[a.index + "," + b.index] || linkedByIndex[b.index + "," + a.index] || a.index == b.index;
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}
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function fade(opacity) {
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return function(d) {
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node.style("stroke-opacity", function(o) {
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thisOpacity = isConnected(d, o) ? 1 : opacity;
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this.setAttribute('fill-opacity', thisOpacity);
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return thisOpacity;
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});
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link.style("stroke-opacity", function(o) {
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return o.source === d || o.target === d ? 1 : opacity;
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});
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};
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}
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var node = vis.selectAll("svg.node")
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.data(json.nodes)
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.enter().append("g")
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.attr("class", "node")
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.on("mouseover", fade(.1))//highlight_nodes(true))
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.on("mouseout", fade(1))//highlight_nodes(false))
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.call(force.drag);
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node.append("ellipse")
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