maperator/js/viz5.js at master · blehman/maperator

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function set_values(timelineData,dateParsed){

// adjusts the location of elements and timeline

var mapWidth = window.innerWidth * 0.5

var mapHeight = window.innerHeight * 0.8

var tweetLeftMargin = (mapWidth + 80) + 'px'

var tweetTopMargin = (-(window.innerHeight)+33)+'px'

d3.select('#photo')

.style("margin-left",tweetLeftMargin)

.style("margin-top",tweetTopMargin+80);

d3.select("#tweet")

.style("margin-left",tweetLeftMargin)

.style("margin-top",tweetTopMargin);

d3.select('#map')

.attr('width',mapWidth)

.attr('height',mapHeight);

// Create timeline

create_timeline(timelineData,mapWidth,dateParsed);

}

function create_random_values(){

// used to jitter points

var num = 0.05

return [getRandomArbitrary(-num,num),getRandomArbitrary(-num,num)]

}

function getRandomArbitrary(min, max) {

return Math.random() * (max - min) + min;

}

function addPoints(x,map){

// adds geo as circles to map

var rand = create_random_values();

var parseDate = d3.time.format("%Y-%m-%d %H:%M:%S").parse;

var dateParsed = parseDate(x.key);

// dateTag is used to class each tweet in a time bucket - currently hardcoded for the hourly bucket

var dateTag = dateParsed.toString().split(':')[0].replace(/ /g,'_');

if (x.value.hasOwnProperty("tweets_geo")){

// checks to see if the times series contains tweet data and then uses geo to create circle on map

x.value.tweets_geo.features.forEach(function(d,i){

var circle = L.circle([parseFloat(d.geometry.coordinates[1]),parseFloat(d.geometry.coordinates[0])],100, {

color: 'grey',

fillColor: 'grey',

fillOpacity: 0.2,

className: "tweet_location_pre_data",

radius: 1

}).addTo(map);

// adds data to each circle

var circleData = d3.selectAll(".tweet_location_pre_data")

.classed("tweet_location_pre_data",false)

.classed("tweet_location " + dateTag,true)

.attr("id","tweetID_"+d.properties.tweet_url.split('/')[5])

.attr("media",d.properties.media)

.attr("tweet",d.properties.tweet_url)

.attr("date",dateParsed);

})

}

function build_map(){

// uses leaflet.js to build a zoomable map

var map = L.map('map').setView([40.0274,-105.2519],13);

var stamen = L.tileLayer('http://{s}.tile.stamen.com/toner/{z}/{x}/{y}.png', {attribution: 'dev.'}).addTo(map);

var toolserver = L.tileLayer('http://{s}.www.toolserver.org/tiles/bw-mapnik/{z}/{x}/{y}.png');

var baseLayers = {"stamen": stamen, "toolserver-mapnik":toolserver};

L.control.layers(baseLayers).addTo(map);

return map;

}

function create_timeline_data(dataArray){

var data = {};

dataArray.forEach(function(d,i){

if (d.value.hasOwnProperty("tweets_geo")){

data[d.key] = d.value.tweets_geo.features.length

}else{

data[d.key] = 0

}

})

return d3.entries(data)

}

function create_timeline(data,mapWidth,dateParsed){

// remove old timeline

d3.select("#timeline").selectAll("*").remove();

var windowHeight = window.innerHeight;

var bisectDate = d3.bisector(function(d) { return d.key; }).left;

var margin = {top: windowHeight*0.1, right: 0, bottom: windowHeight*0.1, left: 50},

width = mapWidth,

height = windowHeight*0.3 - margin.top - margin.bottom;

var parseDate = d3.time.format("%Y-%m-%d %H:%M:%S").parse;

var x = d3.time.scale()

.range([0, width]);

var y = d3.scale.linear()

.range([height, 0]);

// https://github.com/mbostock/d3/wiki/Time-Formatting

var xAxis = d3.svg.axis()

.scale(x)

.ticks(Math.max(width/200,2))

.tickFormat(d3.time.format("%b %d"))

.orient("bottom");

var yAxis = d3.svg.axis()

.scale(y)

.ticks(Math.max(height/50,2))

.orient("left");

var line = d3.svg.line()

.x(function(d) { return x(d.key); })

.y(function(d) { return y(d.value); });

var svg = d3.select("#timeline")

.classed("timeline",true)

.attr("width", width + margin.left + margin.right)

.attr("height", height + margin.top + margin.bottom)

.append("g")

.attr("transform", "translate(" + margin.left + "," + margin.top + ")");

var brush = d3.svg.brush()

.x(x)

.on("brush", brushed);

var brushElement = svg.append("g")

.attr("class", "brushElement")

.call(brush)

.selectAll("rect")

.attr("y", 0)

.attr("height", height);

// transform date string into date object

data.forEach(function(d) {

if (!dateParsed){

d.key = parseDate(d.key);

}

d.value = +d.value;

});

// add range to scales

x.domain(d3.extent(data, function(d) { return d.key; }));

y.domain(d3.extent(data, function(d) { return d.value; }));

// create x axis

svg.append("g")

.attr("class", "x axis")

.attr("transform", "translate(0," + height + ")")

.call(xAxis);

// append the circle at the intersection

var focus = svg.append("g")

.style("display", "none");

// create conditional y axis

if (windowHeight > 600){

svg.append("g")

.attr("class", "y axis")

.call(yAxis)

svg.append("text")

.attr("transform", "rotate(-90)")

.attr("y", 6)

.attr("dy", ".71em")

.style("text-anchor", "end")

.text("Tweets");

};

// create timeline line

svg.append("path")

.datum(data)

.attr("class", "line")

.attr("d", line);

// append the circle at the intersection

focus.append("circle")

.attr("class", "y")

.style("fill", "none")

.style("stroke", "steelblue")

.style("stroke-width",2)

.attr("r", 4);

// append moving red circle to timeline at the intersection

focus.append("circle")

.attr("class", "y")

.style("fill", "none")

.style("stroke", "steelblue")

.style("stroke-width",2)

.attr("r", 8)

// append the rectangle to capture mouse

// svg.append("rect")

// .attr("width", width)

// .attr("height", height)

// .style("fill", "none")

// .style("pointer-events", "all")

// .on("mouseover", function() { focus.style("display", null); })

// .on("mouseout", function() { focus.style("display", "none"); })

// .on("mousemove", mousemove);

function mousemove() {

// x0 is the x-coordinate associated with the mouse location on the timeline

var x0 = x.invert(d3.mouse(this)[0]),

i = bisectDate(data, x0, 1),

d0 = data[i - 1],

d1 = data[i],

d = x0 - d0.key > d1.key - x0 ? d1 : d0;

// dateTag needs to be reconsidered - the split hardcodes hourly buckets

var dateTag = (x0.toString()).split(':')[0].replace(/ /g,'_')

// color circles on map w/ corresponding date

d3.selectAll('.'+dateTag)

.style("fill","red")

.style("fill-opacity",1)

.style("stroke","red")

.style("stroke-opacity",1)

.transition()

.duration(2000)

.delay(0)

.style("fill","steelblue")

.style("fill-opacity",0.2)

.style("stroke","steelblue")

.style("stroke-opacity",0.5)

// create red circles on timeline

focus.append("circle")

.attr("class","remover")

.attr("cx",x(d.key))

.attr("cy",y(d.value))

.attr("fill","red")

.style("fill-opacity",0.1)

.attr("r",8)

.transition()

.duration(1000)

.delay(0)

.remove()

// move the circles at intersection of mouse w/ timeline x-axis

focus.selectAll("circle.y")

.attr("transform",

"translate(" + x(d.key) + "," + y(d.value) + ")");

}

function brushed(){

//console.log(brush.extent())

d3.selectAll(".tweet_location")

.each(function(d) {

var checkDate = new Date(this.getAttribute("date"));

var lowExtent = new Date(brush.extent()[0]),

highExtent = new Date(brush.extent()[1]);

if (lowExtent <= checkDate && checkDate <= highExtent) {

d3.select(this).style({fill: "red", stroke: "red"});

} else {

d3.select(this).style({fill: "grey", stroke: "grey"});

}

})

// .filter(function(d,i){ var checkDate = d.attr("date") //console.log(checkDate);

// return (brush.extent()[0] <= checkDate && checkDate <= brush.extent()[1])

// })

// .forEach(function(d,i){

// console.log(d[0])

// var checkDate = d[0].getAttribute("date")

// //console.log(checkDate);

// if (brush.extent()[0] <= checkDate & checkDate <= brush.extent()[1]){

// console.log("SUCCESS!");

// }

//.style("fill","pink")

//.style("stroke","pink");

//return true

}

d3.json("data/event_viewer.json", function(collection) {

console.log(["collection:",collection])

// build map and creat an svg.

var map = build_map();

// Transform object to array

var dataArray = d3.entries(collection.time_series.interval_data);

var timelineData = create_timeline_data(dataArray);

// insure that once the date strings become date objects, they do not get parsed again.

var dateParsed = false;

// Initialize map & tweet orientation.

set_values(timelineData,dateParsed);

// For each tweet, add a circle to map.

dataArray.map(function(d){addPoints(d,map)});

// Adjust map & tweet orientation when window is resized.

window.addEventListener('resize', function(event){

var dateParsed = true

set_values(timelineData,dateParsed);

});

// Mouseover event that produces embeded tweet

var circles = d3.selectAll(".tweet_location")

circles.on("mouseover",function(event){

// removes old embeded tweet

var element = d3.select(this)

d3.select("#tweet").selectAll("*").remove();

d3.select("#photo").selectAll("*").remove();

// adds new embeded tweet

twttr.widgets.createTweet(

element.attr('tweet').split('/')[5],

document.getElementById('tweet')

);

if (element.attr("media")) {

if (element.attr("media").match("instagram.com") != null){

// embeds instagram photo

d3.select('#photo').attr('src','http://instagram.com/p/' + element.attr("media").split('/')[4] +'/media/?size=l');

}

});

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