[ Launch: bars ] 9820337 by milroc
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bars
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{"description":"bars","endpoint":"","display":"svg","public":true,"require":[],"fileconfigs":{"inlet.js":{"default":true,"vim":false,"emacs":false,"fontSize":12},"src.js":{"default":true,"vim":false,"emacs":false,"fontSize":12},"_.md":{"default":true,"vim":false,"emacs":false,"fontSize":12},"config.json":{"default":true,"vim":false,"emacs":false,"fontSize":12}},"fullscreen":false,"play":false,"loop":false,"restart":false,"autoinit":true,"pause":true,"loop_type":"pingpong","bv":false,"nclones":15,"clone_opacity":0.4,"duration":3000,"ease":"linear","dt":0.01,"ajax-caching":true,"thumbnail":"http://i.imgur.com/M4PYpOV.png"} |
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function randomizeData(n, y) { | |
if (arguments.length < 2) y = 400; | |
if (!arguments.length) n = 20; | |
var i = 0; | |
return d3.range(~~(Math.random()*n) + 1).map(function(d, i) { return { | |
x: ++i, | |
y: ~~(Math.random()*y) | |
}}); | |
} | |
function update() { | |
var data = randomizeData(20, Math.random()*100000); | |
var margin = {top: 0, bottom: 20, left: 0, right: 0}, | |
width = 400, | |
height = 400, | |
duration = 500, | |
formatNumber = d3.format(',d'), | |
brush = d3.svg.brush(); | |
margin.left = formatNumber(d3.max(data, function(d) { return d.y; })).length * 14; | |
var w = width - margin.left - margin.right, | |
h = height - margin.top - margin.bottom; | |
var x = d3.scale.ordinal() | |
.rangeRoundBands([0, w], .1), | |
y = d3.scale.linear() | |
.range([h, 0]); | |
y.domain([0, d3.max(data, function(d) { return d.y; })]); | |
x.domain(data.map(function(d) { return d.x; })); | |
var xAxis = d3.svg.axis() | |
.scale(x) | |
.orient('bottom'), | |
yAxis = d3.svg.axis() | |
.scale(y) | |
.orient('left'), | |
brush = d3.svg.brush() | |
.x(x) | |
.on('brushstart', brushstart) | |
.on('brush', brushmove) | |
.on('brushend', brushend); | |
var svg = d3.select('#display').selectAll('svg').data([data]), | |
svgEnter = svg.enter().append('svg') | |
.append('g') | |
.attr('width', w) | |
.attr('height', h) | |
.attr('transform', 'translate(' + margin.left + ',' + margin.top + ')') | |
.classed('chart', true), | |
chart = d3.select('.chart'); | |
svgEnter.append('g') | |
.classed('x axis', true) | |
.attr('transform', 'translate(' + 0 + ',' + h + ')'); | |
svgEnter.append('g') | |
.classed('y axis', true) | |
svgEnter.append('g').classed('barGroup', true); | |
chart.selectAll('.brush').remove(); | |
chart.selectAll('.selected').classed('selected', false); | |
chart.append('g') | |
.classed('brush', true) | |
.call(brush) | |
.selectAll('rect') | |
.attr('height', h); | |
bars = chart.select('.barGroup').selectAll('.bar').data(data); | |
bars.enter() | |
.append('rect') | |
.classed('bar', true) | |
.attr('x', w) // start here for object constancy | |
.attr('width', x.rangeBand()) | |
.attr('y', function(d, i) { return y(d.y); }) | |
.attr('height', function(d, i) { return h - y(d.y); }); | |
bars.transition() | |
.duration(duration) | |
.attr('width', x.rangeBand()) | |
.attr('x', function(d, i) { return x(d.x); }) | |
.attr('y', function(d, i) { return y(d.y); }) | |
.attr('height', function(d, i) { return h - y(d.y); }); | |
bars.exit() | |
.transition() | |
.duration(duration) | |
.style('opacity', 0) | |
.remove(); | |
chart.select('.x.axis') | |
.transition() | |
.duration(duration) | |
.call(xAxis); | |
chart.select('.y.axis') | |
.transition() | |
.duration(duration) | |
.call(yAxis); | |
function brushstart() { | |
chart.classed("selecting", true); | |
} | |
function brushmove() { | |
var extent = d3.event.target.extent(); | |
bars.classed("selected", function(d) { return extent[0] <= x(d.x) && x(d.x) + x.rangeBand() <= extent[1]; }); | |
makeSum(); | |
} | |
function brushend() { | |
chart.classed("selecting", !d3.event.target.empty()); | |
} | |
function makeSum() { | |
var sumDiv = d3.select('#sum'), | |
extent = brush.extent(), | |
sum = 0; | |
data.forEach(function(d) { | |
if (extent[0] <= x(d.x) && x(d.x) + x.rangeBand() <= extent[1]) | |
sum += d.y; | |
}); | |
sumDiv.text('TOTAL: ' + sum); | |
} | |
makeSum(); | |
} | |
update(); |
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