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visfest block visualization 3
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Raw
index.html
<!DOCTYPE html>
<head>
<meta charset="utf-8">
<script src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/3.10.1/lodash.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/d3/3.5.5/d3.min.js"></script>
<style>
body { margin:0;position:absolute;top:0;right:0;bottom:0;left:0;
overflow-y: scroll;}
svg { width: 1024px; height: 1024px; }
.brush .extent {
fill: #555;
fill-opacity: .1;
stroke: #fff;
shape-rendering: crispEdges;
}
</style>
</head>
<body>
<script>
var margin = {top: 20, right: 10, bottom: 20, left: 10};
var width = 1024 - margin.left - margin.right;
var height = 1024 - margin.top - margin.bottom;
var duration = 200;
var radius = 450;
var apiSize = 60;
var ignoreApi = ['d3.select', 'd3.selectAll'];
var selected = {};
var hovered = false;
var brushing = false;
var force = d3.layout.force()
.size([width, height])
.charge(function(d) {return d.type === 'api' ? 5 : -Math.pow(d.size, 2)})
.linkStrength(function(d) {return d.strength})
.on('end', updateGraph);
var nodes = [],
links = [];
var circle, path, text, summary;
var svg = d3.select("body").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 + ")");
var div = d3.select('body').append('div')
.style({
'width': 1024
});
svg.append("g")
.attr("class", "brush")
.call(d3.svg.brush()
.x(d3.scale.identity().domain([0, width]))
.y(d3.scale.identity().domain([0, height]))
.on('brushstart', function() {brushing = true;})
.on("brush", brush)
.on('brushend', function() {brushing = false;}));
function enterGraph() {
path = svg.selectAll('line')
.data(links).enter().insert('line', '.brush')
.attr('stroke', '#ccc')
.attr('stroke-linecap', 'round');
circle = svg.selectAll('circle')
.data(nodes).enter().append('circle')
.attr('stroke-width', 2)
.style({'cursor': 'pointer'})
.on('mouseover', hover)
.on('mouseleave', unhover)
.on('click', select);
text = svg.selectAll('text')
.data(_.filter(nodes, function(node) {return node.type === 'api';}))
.enter().append('text')
.attr('text-anchor', 'middle')
.attr('dy', '.35em')
.attr('fill', '#555')
.style({
'font-size': '12px',
'font-family': 'Helvetica',
'font-weight': 600,
'cursor': 'pointer'
}).on('mouseover', hover)
.on('mouseleave', unhover)
.on('click', select);
};
function updateGraph() {
circle.attr('r', function(d) {return d.size})
.attr('fill', function(d) {return d.fill || '#fff'})
.attr('fill-opacity', function(d) {return d.type === 'api' ? .25 : 1})
.attr('stroke', function(d) {return d.stroke || 'none'})
.attr('cx', function(d) {return d.x})
.attr('cy', function(d) {return d.y});
text.attr('x', function(d) {return d.x})
.attr('y', function(d) {return d.y + 10})
.text(function(d) {return d.id});
path.attr('stroke-width', function(d) {return d.size})
.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});
};
function renderSummary() {
var selectedData = _.filter(selected, function(d) {return d.type !== 'api'});
summary = div.selectAll('span').data(selectedData);
var enterSummary = summary.enter().append('span');
enterSummary.append('img');
enterSummary.append('a');
summary.style({
'margin': '10px 5px',
'width': 300,
'position': 'relative'
});
summary.select('img')
.attr('src', function(d) {return d.image})
.attr('width', 230)
.attr('height', 120)
.style({
'border': '1px solid #555',
'border-radius': '3px',
'margin': 5
});
summary.select('a')
.attr('href', function(d) {
return 'http://bl.ocks.org/' + d.user + '/' + d.id;
}).attr('target', '_new')
.style({
'font-family': 'Garamond',
'display': 'block',
'color': '#555',
'width': '100%',
'text-align': 'center'
}).text(function(d) {return d.title + ' (' + d.user + ')';});
summary.exit().remove();
};
function hover() {
hovered = d3.select(this).datum();
calculateHighlight(hovered, true, 'hovered');
applyHighlight();
renderSummary();
}
function unhover() {
hovered = false;
calculateHighlight(d3.select(this).datum(), false, 'hovered');
applyHighlight();
renderSummary();
}
function select() {
var data = d3.select(this).datum();
if (selected[data.id]) {
delete selected[data.id];
calculateHighlight(data, false, 'selected');
} else {
selected[data.id] = data;
calculateHighlight(data, true, 'selected');
}
renderSummary();
}
function brush() {
selected = {};
var extent = d3.event.target.extent();
circle.each(function(d) {
if (extent[0][0] <= d.x && d.x < extent[1][0]
&& extent[0][1] <= d.y && d.y < extent[1][1]) {
selected[d.id] = d;
}
});
calculateHighlight(null, true, 'selected');
applyHighlight();
renderSummary();
}
function calculateHighlight(data, highlight, type) {
var nodesToHighlight = {};
path.each(function(d) {
if ((data && d.source.id === data.id) || selected[d.source.id]) {
nodesToHighlight[d.target.id] = selected[d.source.id] ? true : highlight;
d[type] = selected[d.source.id] ? true : highlight;
} else if ((data && d.target.id === data.id) || selected[d.target.id]) {
nodesToHighlight[d.source.id] = selected[d.target.id] ? true : highlight;
d[type] = selected[d.target.id] ? true : highlight;
} else {
d[type] = false;
}
});
circle.each(function(d) {
if ((data && d.id === data.id) || selected[d.id]) {
d[type] = selected[d.id] ? true : highlight;
} else if (nodesToHighlight[d.id]) {
d[type] = nodesToHighlight[d.id];
} else {
d[type] = false;
}
});
text.each(function(d) {
if ((data && d.id === data.id) || selected[d.id]) {
d[type] = selected[d.id] ? true : highlight;
} else if (nodesToHighlight[d.id]) {
d[type] = nodesToHighlight[d.id];
} else {
d[type] = false;
}
});
}
function applyHighlight() {
path.transition().duration(brushing ? 0 : duration)
.attr('stroke-opacity', function(d) {
return d.selected || d.hovered ||
(_.isEmpty(selected) && !hovered) ? 1 : .15;
});
circle.transition().duration(brushing ? 0 : duration)
.attr('fill-opacity', function(d) {
if (d.selected || d.hovered) {
return d.type === 'api' ? .75 : 1;
} else if (_.isEmpty(selected) && !hovered) {
return d.type === 'api' ? .25 : 1;
} else {
return .15;
}
}).attr('stroke-opacity', function(d) {
return d.selected || d.hovered ||
(_.isEmpty(selected) && !hovered) ? 1 : .15;
});
text.transition().duration(brushing ? 0 : duration)
.attr('fill-opacity', function(d) {
return d.selected || d.hovered ||
(_.isEmpty(selected) && !hovered) ? 1 : .15;
});
}
d3.json('data.json', function(data) {
var linkStrengths = [];
var api = _.chain(data)
.pluck('api')
.map(function(api) {return _.pairs(api)})
.flatten().compact()
.filter(function(api) {return !_.contains(ignoreApi, api[0])})
.reduce(function(memo, api) {
linkStrengths.push(api[1]);
if (!memo[api[0]]) {
memo[api[0]] = 0;
}
memo[api[0]] += api[1];
return memo;
}, {})
.value();
var colors = d3.scale.category20();
var sizeScale = d3.scale.linear()
.domain([_.min(api), _.max(api)])
.range([5, 40]);
var widthScale = d3.scale.linear()
.domain([_.min(linkStrengths), _.max(linkStrengths)])
.range([1, 5]);
var strengthScale = d3.scale.linear()
.domain([_.min(linkStrengths), _.max(linkStrengths)])
.range([0, 1]);
var apiNodes = _.chain(api)
.map(function(count, name) {
api[name] = {
id: name,
size: sizeScale(count),
fill: colors(name),
fixed: true,
type: 'api'
};
return api[name];
}).sortBy(function(node) {
return -node.size;
}).map(function(node, i) {
if (i > (apiSize - 1)) {
delete api[node.id];
return;
}
var radian = (2 * Math.PI) / apiSize * i - (Math.PI / 2);
node.x = radius * Math.cos(radian) + (width / 2);
node.y = radius * Math.sin(radian) + (height / 2);
return node;
}).compact().value();
var blockNodes = _.map(data, function(block) {
var node = {
id: block.id,
title: block.description,
user: block.userId,
image: block.thumbnail,
size: 5,
stroke: '#999'
};
_.each(block.api, function(count, apiName) {
if (!api[apiName]) return;
links.push({
source: node,
target: api[apiName],
size: widthScale(count),
strength: strengthScale(count)
});
});
return node;
});
nodes = _.union(apiNodes, blockNodes);
force.nodes(nodes).links(links);
enterGraph();
force.start();
_.times(1000, function() {force.tick();});
force.stop();
});
</script>
</body>
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