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Collapsible tree in reusable format using D3 v4

This is a collapsible tree borrowed heavily from Mike Bostock's and d3noob's blocks. I have structured it such a way though that it is reusable and update-able.

The data presented is the result of bacterial drug resistance profiling for a project I am working on. The output is from the program japsa, which has a multitude of tools for working with Oxford Nanopore data and for analysing bacterial genomics data.

Fri Apr 28 04:52:08 UTC 2017 240 12931 58686821 JSA_9 blaSHV beta-lactamase
Fri Apr 28 04:52:08 UTC 2017 240 12931 58686821 JSA_5 blaTEM beta-lactamase
Fri Apr 28 04:52:08 UTC 2017 240 12931 58686821 JSA_13 strA aminoglycoside
Fri Apr 28 04:52:08 UTC 2017 240 12931 58686821 JSA_28 sul2 sulphonamide
Fri Apr 28 04:52:08 UTC 2017 240 12931 58686821 JSA_20 blaCTX beta-lactamase
Fri Apr 28 04:52:08 UTC 2017 240 12931 58686821 JSA_34 sul1, sul3 sulphonamide
Fri Apr 28 04:52:08 UTC 2017 240 12931 58686821 JSA_33 blaCMY, blaLAT, blaBIL beta-lactamase
Fri Apr 28 04:52:08 UTC 2017 240 12931 58686821 JSA_39 blaOXA beta-lactamase
Fri Apr 28 04:52:08 UTC 2017 240 12931 58686821 JSA_77 aac3 aminoglycoside
Fri Apr 28 04:52:08 UTC 2017 240 12931 58686821 JSA_183 blaNDM beta-lactamase
Fri Apr 28 04:52:08 UTC 2017 240 12931 58686821 JSA_101 oqxA quinolone
Fri Apr 28 04:52:08 UTC 2017 240 12931 58686821 JSA_186 fosA fosfomycin
Fri Apr 28 04:52:08 UTC 2017 240 12931 58686821 JSA_232 aadA aminoglycoside
Fri Apr 28 04:52:08 UTC 2017 240 12931 58686821 JSA_209 tetA tetracycline
Fri Apr 28 04:52:08 UTC 2017 240 12931 58686821 JSA_321 dfrA14 trimethoprim
Fri Apr 28 04:52:08 UTC 2017 240 12931 58686821 JSA_329 QnrB quinolone
Fri Apr 28 04:52:08 UTC 2017 240 12931 58686821 JSA_313 tetA tetracycline
Fri Apr 28 04:52:08 UTC 2017 240 12931 58686821 JSA_342 aac6 aminoglycoside
Fri Apr 28 04:52:08 UTC 2017 240 12931 58686821 JSA_345 blaCTX beta-lactamase
Fri Apr 28 04:52:08 UTC 2017 240 12931 58686821 JSA_475 rmtC aminoglycoside
Fri Apr 28 04:52:08 UTC 2017 240 12931 58686821 JSA_514 mphA macrolide
Fri Apr 28 04:52:08 UTC 2017 240 12931 58686821 JSA_525 blaCTX beta-lactamase
Fri Apr 28 04:52:08 UTC 2017 240 12931 58686821 JSA_544 strB aminoglycoside
Fri Apr 28 04:52:08 UTC 2017 240 12931 58686821 JSA_490 oqxB quinolone
.node circle {
fill: #fff;
stroke: steelblue;
stroke-width: 3px;
}
.node text {
font: 12px sans-serif;
}
.link {
fill: none;
stroke: #ccc;
stroke-width: 2px;
}
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Collapsible tree in reusable format using D3 v4</title>
<script src="https://d3js.org/d3.v4.js"></script>
<link rel="stylesheet" href="index.css">
<script src="index.js"></script>
</head>
<body>
<div id="chart"></div>
<script>
var myTree = tree().height(500).width(960);
d3.text('data.tsv', function(error, text) {
if (error) throw error;
var table = [{
name: 'detected',
parent: null
}];
var genes = [];
var drugs = [];
d3.tsvParseRows(text, function (d, i) {
if (d[0].startsWith('#')) return;
if (!genes.find(function(element){ return element === d[5]; })) {
table.push({
name: d[5],
parent: d[6]
});
genes.push(d[5]);
}
if (!drugs.find(function(element){ return element === d[6]; })) {
table.push({
name: d[6],
parent: "detected"
});
drugs.push(d[6]);
}
});
var root = d3.stratify()
.id(function(d) { return d.name; })
.parentId(function (d) { return d.parent; })
(table);
myTree.data(root);
d3.select('#chart')
.call(myTree);
});
</script>
</body>
</html>
function tree() {
var data,
i = 0,
duration = 750,
margin = {top: 20, right: 10, bottom: 30, left: 30},
width = 960 - margin.left - margin.right,
height = 500 - margin.top - margin.bottom,
update;
function chart(selection){
selection.each(function() {
height = height - margin.top - margin.bottom;
width = width - margin.left - margin.right;
// append the svg object to the selection
var svg = selection.append('svg')
.attr('width', width + margin.left + margin.right)
.attr('height', height + margin.top + margin.bottom)
.append('g')
.attr('transform', 'translate(' + margin.left + ',' + margin.top + ')');
// declares a tree layout and assigns the size of the tree
var treemap = d3.tree().size([height, width]);
// assign parent, children, height, depth
var root = d3.hierarchy(data, function(d) { return d.children });
root.x0 = height / 2; // left edge of the rectangle
root.y0 = 0; // top edge of the triangle
// collapse after the second level
root.children.forEach(collapse);
update(root);
// collapse the node and all it's children
function collapse(d) {
if (d.children) {
d._children = d.children;
d._children.forEach(collapse);
d.children = null;
}
}
function update(source) {
// assigns the x and y position for the nodes
var treeData = treemap(root);
// compute the new tree layout
var nodes = treeData.descendants(),
links = treeData.descendants().slice(1);
// normalise for fixed depth
nodes.forEach(function(d) { d.y = d.depth * 180; });
// ****************** Nodes section ***************************
// update the nodes ...
var node = svg.selectAll('g.node')
.data(nodes, function(d) { return d.id || (d.id = ++i); });
// Enter any new modes at the parent's previous position.
var nodeEnter = node.enter().append('g')
.attr('class', 'node')
.attr('transform', function(d) {
return 'translate(' + (source.y0 + margin.top) + ',' + (source.x0 + margin.left) + ')';
})
.on('click', click);
// add circle for the nodes
nodeEnter.append('circle')
.attr('class', 'node')
.attr('r', 1e-6)
.style('fill', function(d) {
return d._children ? 'lightsteelblue' : '#fff';
});
// add labels for the nodes
nodeEnter.append('text')
.attr('dy', '.35em')
.attr('x', function(d) {
return d.children || d._children ? 0 : 13;
})
.attr('y', function(d) {
return d.children || d._children ? -margin.top : 0;
})
.attr('text-anchor', function(d) {
return d.children || d._children ? 'middle' : 'start';
})
.text(function(d) {
return (d.children || d._children) ? d.data.id.capitalize() : d.data.id;
});
// add number of children to node circle
nodeEnter.append('text')
.attr('x', -3)
.attr('y', 3)
.attr('cursor', 'pointer')
.style('font-size', '10px')
.text(function(d) {
if (d.children) return d.children.length;
else if (d._children) return d._children.length;
});
// UPDATE
var nodeUpdate = nodeEnter.merge(node);
// transition to the proper position for the node
nodeUpdate.transition().duration(duration)
.attr('transform', function(d) {
return 'translate(' + (d.y + margin.top) + ',' + (d.x + margin.left) + ')';
});
// update the node attributes and style
nodeUpdate.select('circle.node')
.attr('r', 9)
.style('fill', function(d) {
return d._children ? 'lightsteelblue' : '#fff';
})
.attr('cursor', 'pointer');
// remove any exiting nodes
var nodeExit = node.exit()
.transition().duration(duration)
.attr('transform', function(d) {
return 'translate(' + (source.y + margin.top) + ',' + (source.x + margin.left) + ')';
})
.remove();
// on exit reduce the node circles size to 0
nodeExit.select('circle')
.attr('r', 1e-6);
// on exit reduce the opacity of text labels
nodeExit.select('text')
.style('fill-opacity', 1e-6);
// ****************** links section ***************************
// update the links
var link = svg.selectAll('path.link')
.data(links, function(d) { return d.id });
// enter any new links at the parent's previous position
var linkEnter = link.enter().insert('path', 'g')
.attr('class', 'link')
.attr('d', function(d) {
var o = {x: source.x0 + margin.left, y: source.y0 + margin.top};
return diagonal(o, o);
});
// UPDATE
var linkUpdate = linkEnter.merge(link);
// transition back to the parent element position
linkUpdate.transition().duration(duration)
.attr('d', function(d) { return diagonal(d, d.parent); });
// remove any exiting links
var linkExit = link.exit()
.transition().duration(duration)
.attr('d', function(d) {
var o = {x: source.x, y: source.y};
return diagonal(o, o);
})
.remove();
// store the old positions for transition
nodes.forEach(function(d) {
d.x0 = d.x + margin.left;
d.y0 = d.y + margin.top;
});
// creates a curved (diagonal) path from parent to the child nodes
function diagonal(s, d) {
path = 'M ' + (s.y + margin.top) + ' ' + (s.x + margin.left) +
'C ' + ((s.y + d.y + (margin.top * 2)) / 2) + ' ' + (s.x + margin.left) +
', ' + ((s.y + d.y + (margin.top * 2)) / 2) + ' ' + (d.x + margin.left) +
', ' + (d.y + margin.top) + ' ' + (d.x + margin.left);
return path;
}
// toggle children on click
function click(d) {
if (d.children) {
d._children = d.children;
d.children = null;
} else {
d.children = d._children;
d._children = null;
}
update(d);
}
}
});
}
chart.width = function(value) {
if (!arguments.length) return width;
width = value;
return chart;
};
chart.height = function(value) {
if (!arguments.length) return height;
height = value;
return chart;
};
chart.margin = function(value) {
if (!arguments.length) return margin;
margin = value;
return chart;
};
chart.data = function(value) {
if (!arguments.length) return data;
data = value;
if (typeof updateData === 'function') updateData();
return chart;
};
String.prototype.capitalize = function() {
return this.charAt(0).toUpperCase() + this.slice(1).toLowerCase();
};
return chart;
}
MIT License
Copyright (c) 2017 Michael Hall
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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