pandora_cms/static/ontology/index.js

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JavaScript
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var margin = {
top: 20,
right: 120,
bottom: 20,
left: 120
},
width = 3000 - margin.right - margin.left,
height = window.innerHeight - margin.top - margin.bottom;
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var i = 0,
duration = 750,
root;
var tree = d3.layout.tree()
.size([height, width]);
var diagonal = d3.svg.diagonal()
.projection(function(d) { return [d.y, d.x]; });
var svg = d3.select("body").append("svg")
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.attr("width", width)
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.attr("height", height + margin.top + margin.bottom)
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.append("g")
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.attr("transform", "translate(" + margin.left + "," + margin.top + ")");
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d3.json("sized_ontology.json", function(error, nodes) {
root = nodes;
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root.x0 = height / 2;
root.y0 = 0;
function collapse(d) {
if (d.children) {
if (!d.children[0].children) {
d._children = d.children;
d._children.forEach(collapse);
d.children = null;
} else {
d.children.forEach(collapse);
}
}
}
root.children.forEach(collapse);
update(root);
});
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function resize() {
root.x0 = height / 2;
root.y0 = 0;
update(root);
}
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function zoom(size) {
height = size;
tree.size([height, width]);
svg.attr("width", width).attr("height", height + margin.top + margin.bottom)
document.querySelector('svg').attributes.height.value = height + margin.top + margin.bottom
resize()
}
document.querySelector('.zoom button.plus').addEventListener('click', function(event) {
zoom(height*1.5)
})
document.querySelector('.zoom button.minus').addEventListener('click', function(event) {
zoom(height/1.5)
})
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function get_color(d) {
if (d.children || d._children) {
return '#fff'
}
return "lightsteelblue";
}
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function update(source) {
// Compute the new tree layout.
var nodes = tree.nodes(root).reverse(),
links = tree.links(nodes);
// Normalize for fixed-depth.
nodes.forEach(function(d) { d.y = d.depth * 180; });
// Update the nodes…
var node = svg.selectAll("g.node")
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.data(nodes, function(d) {
return d.id || (d.id = ++i);
});
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// Enter any new nodes at the parent's previous position.
var nodeEnter = node.enter().append("g")
.attr("class", "node")
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.attr("transform", function(d) {
return "translate(" + source.y0 + "," + source.x0 + ")";
})
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.on("click", click);
nodeEnter.append("circle")
.attr("r", 1e-6)
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.style("fill", get_color)
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nodeEnter.append("text")
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.attr("x", function(d) {
return d.children || d._children ? -10 : 10;
})
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.attr("dy", ".35em")
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.attr("text-anchor", function(d) {
return d.children || d._children ? "end" : "start";
})
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.text(function(d) {
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if (d.children || d._children) {
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//return d.name;
return d.name + '(' + (d.children || d._children).length +')';
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}
return d.name + ' (' + d.size + ')';
})
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.style("fill-opacity", 1e-6);
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// Transition nodes to their new position.
var nodeUpdate = node.transition()
.duration(duration)
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.attr("transform", function(d) {
return "translate(" + d.y + "," + d.x + ")";
});
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nodeUpdate.select("circle")
.attr("r", 4.5)
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.style("fill", get_color)
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nodeUpdate.select("text")
.style("fill-opacity", 1);
// Transition exiting nodes to the parent's new position.
var nodeExit = node.exit().transition()
.duration(duration)
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.attr("transform", function(d) {
return "translate(" + source.y + "," + source.x + ")";
})
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.remove();
nodeExit.select("circle")
.attr("r", 1e-6);
nodeExit.select("text")
.style("fill-opacity", 1e-6);
// Update the links…
var link = svg.selectAll("path.link")
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.data(links, function(d) {
return d.target.id;
});
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// Enter any new links at the parent's previous position.
link.enter().insert("path", "g")
.attr("class", "link")
.attr("d", function(d) {
var o = {x: source.x0, y: source.y0};
return diagonal({source: o, target: o});
});
// Transition links to their new position.
link.transition()
.duration(duration)
.attr("d", diagonal);
// Transition exiting nodes to the parent's new position.
link.exit().transition()
.duration(duration)
.attr("d", function(d) {
var o = {x: source.x, y: source.y};
return diagonal({source: o, target: o});
})
.remove();
// Stash the old positions for transition.
nodes.forEach(function(d) {
d.x0 = d.x;
d.y0 = d.y;
});
}
// 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;
}
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if (!d.children && ! d._children) {
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var name = d.parent.name + ': ' + d.name
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var url = '/clip/created/keywords=' + name
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if (d.parent.name == 'other') {
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url = '/clip/created/keywords==' + d.name
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}
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window.open(url, '_blank');
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} else {
update(d);
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}
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}