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/*
Tim Redfern Jan 2012 tim@eclectronics.org
Animated graphing - Edmund Rice School Ties
see analytics.js example
http://net.tutsplus.com/tutorials/javascript-ajax/an-introduction-to-the-raphael-js-library/
aim for today: have a few items that can be chosen
1) switch items - multiple lines view .. x amount of lines + 'other'
2) animate between views
3) rollover points
4) label axes
*/
var data,raphael,classOfRange,birthplaces,colleges,locations,fields;
var graphData;
var maxPaths;
var graph,bgGraph;
var graphs,labels,axislabels;
var numYears,gutterX,gutterY,gridX,gridY;
var startPath;
window.onload = function() {
loadData();
createMenu();
//alert(document.getElementById("holder").offsetWidth+","+document.getElementById("holder").offsetHeight);
//seems predictable, gives same result in chrome, firefox, mobile safari
var graphDiv=document.getElementById('graph');
raphael = new Raphael(graphDiv, graphDiv.offsetWidth, graphDiv.offsetHeight);
gutterX=20,
gutterY=40;
gridX=(raphael.width-(gutterX*2))/numYears;
gridY=(raphael.height-(gutterY*2));
drawGrid();
var color = "hsl(" + [.6, .5, .5] + ")";
graph = raphael.path().attr({stroke: color, "stroke-width": 4, "stroke-linejoin": "round"});
bgGraph = raphael.path().attr({stroke: "none", opacity: .3, fill: color});
maxPaths=8;
graphs=[];
labels=[];
startPath=["M", gutterX , raphael.height - gutterY, "L", raphael.width-gutterX, raphael.height - gutterY];
for (var i=0;i<maxPaths;i++) {
var col=Raphael.getColor();
graphs[i]=raphael.path().attr({stroke: col, "stroke-width": 4, "stroke-linejoin": "round"});
graphs[i].attr({path:startPath});
graphs[i].hide();
var txt = {font: '16px Helvetica, Arial', fill: col, 'text-anchor': 'start'};
labels[i]=raphael.text((((raphael.width-gutterX)/(maxPaths+1))*i)+gutterX, raphael.height-gutterY+26, "").attr(txt);
labels[i].hide();
}
axislabels=[];
for (var i=0;i<2;i++) {
var txt = {font: '12px Helvetica, Arial', fill: '#fff'};
axislabels[i]=raphael.text(5, raphael.height-(gutterY+(((raphael.height-(gutterY*2))/1)*i)), "").attr(txt);
}
drawGraph(0,0);
}
function graphableData(name) {
//organises a range of data to graph against a variable value
//stores the count of instances for each value
this.name=name;
this.data={};
this.max=0;
this.addElement = function(element,value) {
if (element in this.data) {
if (value in this.data[element]) this.data[element][value]++;
else this.data[element][value]=1;
}
else {
this.data[element]={};
this.data[element][value]=1
}
if (this.data[element][value]>this.max) this.max=this.data[element][value];
}
this.getElement = function(element) {
if (element in this.data) return data[element]; //returns an associative array
}
this.getValue = function(element,value) {
if (element in this.data) {
if (value in this.data[element]) return this.data[element][value]; //returns a value
else return 0;
}
else return 0;
}
this.summary = function() {
var s= ""+name+": "+Object.keys(this.data).length+" elements, max "+this.max+"\n";
var k=Object.keys(this.data);
//s+=k+":";
for (i in k) {
s+=k[i]+":";
var l=Object.keys(this.data[k[i]]);
for (j in l) s+=l[j]+"="+this.data[k[i]][l[j]]+",";
s+="\n";
}
return s+"\n";
}
this.getKeys = function() {
return Object.keys(this.data);
}
}
function loadData() {
maxPaths=8;
//replace with json loader
fields=["Class size","Location","Birthplace","College","Career"];
fieldNames=["classSize","location","birthplace","college","career"];
//basic { name:"Joe", surname:"Murphy",school:"Dublin",classOf:"86",location:"Ireland",email:"joem20156@gmail.com"},
//extended { name:"Joe", surname:"Murphy",school:"Dublin",classOf:"86",location:"Ireland",email:"joem20156@gmail.com",birthplace:"Ireland",college:"UCD",career:"construction",sports:["soccer","hurling"],nickname:"Virgil"},
data = [
{ school:"Dublin",classOf:"86",location:"Ireland",birthplace:"Ireland",college:"UCD",career:"construction",sports:["soccer","hurling"],nickname:"Virgil"},
{ school:"Dublin",classOf:"87",location:"Ireland",birthplace:"Ireland",college:"NUIG",career:"law",sports:["soccer","gaelic"],nickname:"Con"},
{ school:"Dublin",classOf:"86",location:"Ireland",birthplace:"Ireland",college:"TCD",career:"teaching",sports:["gaelic","hurling"],nickname:"Morty"},
{ school:"Dublin",classOf:"88",location:"USA",birthplace:"UK",college:"UL",career:"army",sports:["soccer"],nickname:"Mick"},
{ school:"Dublin",classOf:"87",location:"Ireland",birthplace:"Ireland",college:"UCD",career:"law",sports:["soccer","gaelic"],nickname:"Johnjoe"},
{ school:"Dublin",classOf:"86",location:"UK",birthplace:"Ireland",college:"TCD",career:"teaching",sports:["handball","hurling"],nickname:"Mossy"},
{ school:"Dublin",classOf:"89",location:"USA",birthplace:"UK",college:"UL",career:"army",sports:["soccer"],nickname:"Mick"},
{ school:"Dublin",classOf:"90",location:"Ireland",birthplace:"Ireland",college:"UCD",career:"law",sports:["soccer","gaelic"],nickname:"Johnjoe"},
{ school:"Dublin",classOf:"88",location:"Ireland",birthplace:"Ireland",college:"UCC",career:"teaching",sports:["handball","hurling"],nickname:"Mossy"},
];
//analyse data to populate menus etc, this may be loaded direct from corresponding server data
classOfRange={};
classOfRange.start=3000;
classOfRange.end=0;
//prepare all data for graphing
graphData={};
for (i in fields) graphData[fields[i]]=new graphableData(fields[i]);
for (var i in data) {
var year = parseInt(data[i].classOf);
classOfRange.start=Math.min(classOfRange.start,year);
classOfRange.end=Math.max(classOfRange.end,year);
for (j in fields) {
if (fields[j]=="Class size") {
graphData[fields[j]].addElement("Class size",parseInt(data[i].classOf));
}
else graphData[fields[j]].addElement(data[i][fieldNames[j]],parseInt(data[i].classOf));
}
}
numYears=(classOfRange.end-classOfRange.start);
/* test
var message="from "+classOfRange.start+" to "+classOfRange.end+"\n";
for (var i in graphData) message+=graphData[i].summary();
alert(message);
*/
}
function drawGrid() {
raphael.drawGrid(gutterX, gutterY, raphael.width-(gutterX*2), raphael.height -(gutterY*2), numYears, 10, "#000");
//label axis
var txt = {font: '12px Helvetica, Arial', fill: "#fff"};
for (var i=0;i<=numYears;i++) raphael.text(gutterX+(i*gridX),raphael.height-gutterY+8,classOfRange.start+i).attr(txt).toBack();
}
function createMenu() {
var menu="<select id='select' onchange='drawGraph(this.selectedIndex,1000)'>\n";
for (i in fields) menu+="<option>"+fields[i]+"</option>/n";
menu+="</select>\n";
document.getElementById("menus").innerHTML=menu;
}
function drawOneGraph(which,time){
var datum=fields[which];
var datelem=graphData[datum].getKeys()[0];
//draw 1 or multiple graphs. animate between items
//maximum number of graphs
//construct graph
var path,bgPath;
var stepY=(gridY/graphData[datum].max);
for (var i=0;i<=numYears;i++) {
var x=gutterX+(i*gridX),
y=raphael.height-gutterY-(stepY*graphData[datum].getValue(datelem,i+classOfRange.start));
if (!i) {
path=["M",x,y,"C",x,y];
bgPath=["M", gutterX , raphael.height - gutterY, "L", x, y, "C", x, y];
}
if (i&&i<numYears-1) {
var Y0 = Math.round(raphael.height - gutterY - (stepY*graphData[datum].getValue(datelem,i+classOfRange.start-1))),
X0 = Math.round(gutterX + (gridX * (i - .5))),
Y2 = Math.round(raphael.height - gutterY - (stepY*graphData[datum].getValue(datelem,i+classOfRange.start+1))),
X2 = Math.round(gutterX + (gridX * (i + 1.5)));
var a = getAnchors(X0, Y0, x, y, X2, Y2);
path = path.concat([a.x1, a.y1, x, y, a.x2, a.y2]);
bgPath = bgPath.concat([a.x1, a.y1, x, y, a.x2, a.y2]);
}
}
path = path.concat([x, y, x, y]);
bgPath = bgPath.concat([x, y, x, y, "L", x, raphael.height - gutterY, "z"]);
graph.animate({path: path},time,'easeIn');
bgGraph.animate({path: bgPath},time,'easeIn');
}
function drawGraph(which,time){
var datum=fields[which];
var keys=graphData[datum].getKeys();
//draw 1 or multiple graphs. animate between items
//maximum number of graphs
//construct graph
var paths=[];
var stepY=(gridY/graphData[datum].max);
for (var k in keys) {
for (var i=0;i<=numYears;i++) {
var x=gutterX+(i*gridX),
y=raphael.height-gutterY-(stepY*graphData[datum].getValue(keys[k],i+classOfRange.start));
if (!i) {
paths[k]=["M",x,y,"L"]; //,"C",x,y];
}
else paths[k] = paths[k].concat([x,y]);
/*if (i&&i<numYears-1) {
var Y0 = Math.round(raphael.height - gutterY - (stepY*graphData[datum].getValue(keys[k],i+classOfRange.start-1))),
X0 = Math.round(gutterX + (gridX * (i - .5))),
Y2 = Math.round(raphael.height - gutterY - (stepY*graphData[datum].getValue(keys[k],i+classOfRange.start+1))),
X2 = Math.round(gutterX + (gridX * (i + 1.5)));
var a = getAnchors(X0, Y0, x, y, X2, Y2);
paths[k] = paths[k].concat([a.x1, a.y1, x, y, a.x2, a.y2]);
}
*/
}
//paths[k] = paths[k].concat([x, y, x, y]);
}
for (var i=0;i<maxPaths;i++) {
if (i<=k) {
graphs[i].show();
graphs[i].animate({path: paths[i]},time,'easeIn');
labels[i].show().attr({text:keys[i]});
labels[i].show();
}
else {
graphs[i].hide();
graphs[i].attr({path:startPath});
labels[i].hide();
}
}
for (var i=0;i<2;i++) {
var txt = {font: '12px Helvetica, Arial', fill: '#fff'};
axislabels[i].attr({text:(graphData[datum].max*i).toString()});
}
}
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