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Adding the histogram widget. This will probably get swapped out for the cartodb.js version.

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Stuart Lynn 9 years ago
parent e485ca4d99
commit f0ed6e2ecd
3 changed files with 533 additions and 0 deletions
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379
examples/histogram.html
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<html>
<link rel="stylesheet" href="vendor/leaflet.css" />
<style>
#map, html, body {
width: 100%; height: 100%; padding: 0; margin: 0;
}
#title {
position: absolute;
top: 100px;
left: 50px;
color: white;
font-size: 27px;
font-family: Helvetica, sans-serif;
}
#histogram_magtype{
top: 250px;
}
#histogram_depth{
top: 500px;
}
.histogram{
height: 200px;
width: 300px;
position:absolute;
left: 20px;
top: 20px;
z-index: 20;
}
</style>
<body>
<div id="map"></div>
<div id='histogram_mag' class='histogram'></div>
<div id='histogram_magtype' class='histogram'></div>
<div id='histogram_depth' class='histogram'></div>
<script src='https://code.jquery.com/jquery-2.1.4.js'></script>
<link rel="stylesheet" href="http://cdn.leafletjs.com/leaflet-0.7.3/leaflet.css" />
<script src="http://cdn.leafletjs.com/leaflet-0.7.3/leaflet.js"></script>
<script src="../dist/torque.full.uncompressed.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/d3/3.5.6/d3.js" charset="utf-8"></script>
<script src="./vendor/torque.histogram.js"></script>
<link rel="stylesheet" href="./vendor/torque.histogram.css" type="text/css" media="screen" title="no title" charset="utf-8">
<script src='./vendor/underscore.js'></script>
<script src='./vendor/backbone.js'></script>
<script src="./vendor/histogram-widget.js "></script>
<script>
// define the torque layer style using cartocss
// this creates a kind of density map
//color scale from http://colorbrewer2.org/
var CARTOCSS = [
'Map {',
'-torque-frame-count:1;',
'-torque-animation-duration:30;',
'-torque-time-attribute:"day";',
'-torque-aggregation-function:"count(cartodb_id)";',
'-torque-resolution:0.25;',
'-torque-data-aggregation:linear;',
'}',
'#mapsense_insights_6months_000_1m{',
' comp-op: color-dodge;',
' marker-fill-opacity: 0.4;',
' marker-fill: #FFA300;',
' marker-line-width: 0;',
' marker-line-opacity: 1;',
' marker-type: ellipse;',
' marker-width: 0.35;',
'[zoom=1]{',
'[ value > 1 ]{marker-width:0.1401958184807689;}',
'[ value > 11 ]{marker-width:0.4649769270774838;}',
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'[ value > 81 ]{marker-width:1.26176236632692;}',
'[ value > 91 ]{marker-width:1.3373828712353972;}',
'}',
'[zoom=2]{',
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'[ value > 11 ]{marker-width:0.5579723124929806;}',
'[ value > 21 ]{marker-width:0.7709495403652948;}',
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'}',
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'}}'
].join('\n');
var map = new L.Map('map', {
zoomControl: true,
center: [40, 0],
zoom: 3
});
L.tileLayer('http://{s}.api.cartocdn.com/base-dark/{z}/{x}/{y}.png', {
attribution: 'CartoDB'
}).addTo(map);
var torqueLayer = new L.TorqueLayer({
user : 'stuartlynn',
table : 'mapsense',
cartocss: CARTOCSS,
provider: "jsonHistogram",
variables: [
{
name: "cat_id",
type: 'category'
},
{
name: "requests",
type: 'float',
noBins: 20
}
]
});
torqueLayer.addTo(map);
torqueLayer.on("histLoaded",function(){
})
window.layer=torqueLayer
torque.widgets.histogram('#histogram_mag', torqueLayer, "cat_id")
torque.widgets.histogram('#histogram_depth', torqueLayer, "requests")
// torque.widgets.histogram('#histogram_magtype', torqueLayer, "group_id")
// map.on('click', function(e) {
// var p = e.containerPoint
// var value = torqueLayer.getValueForPos(p.x, p.y);
// if (value !== null) {
// map.openPopup('average temperature: ' + value.value + "C", e.latlng);
// }
// });
//
//
// // show small rectable and change cursor on hover
// var hover = null;
// map.on('mousemove', function(e) {
// var p = e.containerPoint
// var value = torqueLayer.getValueForPos(p.x, p.y);
//
// // remove previous hover box
// if (hover) {
// map.removeLayer(hover);
// hover = null;
// }
//
// if (value !== null) {
// hover = L.rectangle(value.bbox, {
// color: '#000',
// weight: 1
// }).addTo(map);
// map._container.style.cursor = 'pointer';
// } else {
// map._container.style.cursor = 'auto';
// }
// });
</script>
</body>
</html>

14
examples/vendor/torque.histogram.css vendored
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.torque-histogram .axis text {
font: 10px sans-serif;
fill: white;
}
.torque-histogram .bars rect {
fill: steelblue;
}
.torque-histogram .axis path,
.torque-histogram .axis line {
fill: none;
stroke: #FFF;
shape-rendering: crispEdges;
}

140
examples/vendor/torque.histogram.js vendored
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// histogram widget for torque
// d3 based
function histogramChart() {
var margin = {top: 0, right: 0, bottom: 20, left: 0},
width = 960,
height = 500;
var histogram = d3.layout.histogram(),
x = d3.scale.ordinal(),
y = d3.scale.linear(),
xAxis = d3.svg.axis().scale(x).orient("bottom").tickSize(6, 0);
function chart(selection) {
selection.each(function(data) {
// Compute the histogram.
// data = histogram(data);
// Update the x-scale.
x .domain(data.map(function(d) { return d[0]; }))
.rangeRoundBands([0, width - margin.left - margin.right], .1);
// Update the y-scale.
y .domain([0, d3.max(data, function(d) { return d[1]; })])
.range([height - margin.top - margin.bottom, 0]);
// Select the svg element, if it exists.
var svg = d3.select(this).selectAll("svg")
.attr('class', 'torque-histogram')
.data([data]);
// Otherwise, create the skeletal chart.
var gEnter = svg.enter().append("svg").append("g");
gEnter.append("g").attr("class", "bars");
gEnter.append("g").attr("class", "x axis");
// Update the outer dimensions.
svg .attr("width", width)
.attr("height", height);
// Update the inner dimensions.
var g = svg.select("g")
.attr("transform", "translate(" + margin.left + "," + margin.top + ")");
// Update the bars.
var bar = svg.select(".bars").selectAll(".bar").data(data);
bar.enter().append("rect").attr('class', 'bar');
bar.exit().remove();
bar .attr("width", x.rangeBand())
.attr("x", function(d) { return x(d[0]); })
.attr("y", function(d) { return y(d[1]); })
.attr("height", function(d) { return y.range()[0] - y(d[1]); })
.order();
// Update the x-axis.
g.select(".x.axis")
.attr("transform", "translate(0," + y.range()[0] + ")")
.call(xAxis);
});
}
chart.margin = function(_) {
if (!arguments.length) return margin;
margin = _;
return chart;
};
chart.width = function(_) {
if (!arguments.length) return width;
width = _;
return chart;
};
chart.height = function(_) {
if (!arguments.length) return height;
height = _;
return chart;
};
// Expose the histogram's value, range and bins method.
d3.rebind(chart, histogram, "value", "range", "bins");
// Expose the x-axis' tickFormat method.
d3.rebind(chart, xAxis, "tickFormat");
return chart;
}
torque.widgets = torque.widgets || {}
/**
* creates an histogram inside the element based on torque data
* @id any d3 valid selector
* @torqueLayer torque layer objecy
* @returns histogram widget object
*/
torque.widgets.histogram = function(id, torqueLayer, variable) {
function updateHistogram() {
var values = torqueLayer.totalHistogramFor(variable, 0);
var el = d3.select(id)
.datum(values)
var size = el.node().getBoundingClientRect()
var start = new Date()
console.log( "starting d3 ", start)
el.call(histogramChart()
.width(size.width)
.height(size.height)
.bins(10)
.tickFormat(d3.format(".0f"))
);
var end = new Date()
console.log( "end d3 ", (end-start)/1000.0)
};
// public API
var h = {
disable: function() {
// torqueLayer.off('change:time', updateHistogram);
// torqueLayer.off('tilesLoaded', updateHistogram);
// torqueLayer.off('tileLoaded', updateHistogram);
torqueLayer.off('histLoaded', updateHistogram);
},
enable: function() {
// torqueLayer.on('change:time', updateHistogram);
// torqueLayer.on('tilesLoaded', updateHistogram);
// torqueLayer.on('tileLoaded', updateHistogram);
torqueLayer.on('histLoaded', updateHistogram);
}
}
h.enable();
return h;
}
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