var labelType, useGradients, nativeTextSupport, animate;

(function() {
  var ua = navigator.userAgent,
	  iStuff = ua.match(/iPhone/i) || ua.match(/iPad/i),
	  typeOfCanvas = typeof HTMLCanvasElement,
	  nativeCanvasSupport = (typeOfCanvas == 'object' || typeOfCanvas == 'function'),
	  textSupport = nativeCanvasSupport 
		&& (typeof document.createElement('canvas').getContext('2d').fillText == 'function');
  //I'm setting this based on the fact that ExCanvas provides text support for IE
  //and that as of today iPhone/iPad current text support is lame
  labelType = (!nativeCanvasSupport || (textSupport && !iStuff))? 'Native' : 'HTML';
  nativeTextSupport = labelType == 'Native';
  useGradients = nativeCanvasSupport;
  animate = !(iStuff || !nativeCanvasSupport);
})();

var Log = {
  elem: false,
  write: function(text){
	if (!this.elem) 
	  this.elem = document.getElementById('log');
	this.elem.innerHTML = text;
	this.elem.style.left = (500 - this.elem.offsetWidth / 2) + 'px';
  }
};


function init(){
  //init data
  var json = {
	"children": [
	 
	 {
	   "data":{"cap":"","sec": "Yes","$area": 1,"$color":"#009900"}, 
	   "id": "Eni Spa <sup>*</sup>", 
	   "name": "Eni Spa <sup>*</sup>"
	 },	 
	 {
	   "data":{"cap":"","sec": "No","$area": 1,"$color":"#172A3A"}, 
	   "id": "Erg Spa <sup>*</sup>", 
	   "name": "Erg Spa <sup>*</sup>"
	 },	 
	 {
	   "data":{"cap":"&#8364;113,000,000","sec": "No","$area": 113000000,"$color":"#1D2A50"}, 
	   "id": "Rosetti Marino Spa", 
	   "name": "Rosetti Marino Spa"
	 },	 
	 {
	   "data":{"cap":"&#8364;955,755,000","sec": "No","$area": 955755008,"$color":"#1E2C4B"}, 
	   "id": "Saras Spa", 
	   "name": "Saras Spa"
	 },	 
	 {
	   "data":{"cap":"","sec": "No","$area": 1,"$color":"#192B38"}, 
	   "id": "Saipem-rcv <sup>*</sup>", 
	   "name": "Saipem-rcv <sup>*</sup>"
	 },	 
	 {
	   "data":{"cap":"&#8364;15,722,288,000","sec": "No","$area": 15722288128,"$color":"#1C325B"}, 
	   "id": "Saipem Spa", 
	   "name": "Saipem Spa"
	 },	 
	 {
	   "data":{"cap":"&#8364;95,141,052,000","sec": "Yes","$area": 95141052416,"$color":"#009900"}, 
	   "id": "Total Sa <sup>*</sup>", 
	   "name": "Total Sa <sup>*</sup>"
	 },	 
	 {
	   "data":{"cap":"&#8364;18,298,321,000","sec": "Yes","$area": 18298320896,"$color":"#009900"}, 
	   "id": "Tenaris Sa", 
	   "name": "Tenaris Sa"
	 },	 
	 {
	   "data":{"cap":"","sec": "No","$area": 1,"$color":"#17284F"}, 
	   "id": "Kme Group-rsp <sup>*</sup>", 
	   "name": "Kme Group-rsp <sup>*</sup>"
	 },	 
	 {
	   "data":{"cap":"&#8364;157,757,000","sec": "No","$area": 157756608,"$color":"#1C2D53"}, 
	   "id": "Kme Group", 
	   "name": "Kme Group"
	 },	 
	 {
	   "data":{"cap":"&#8364;24,409,000","sec": "No","$area": 24408692,"$color":"#153160"}, 
	   "id": "Gruppo Minerali Maffei", 
	   "name": "Gruppo Minerali Maffei"
	 },	 
	 {
	   "data":{"cap":"&#8364;341,205,000","sec": "No","$area": 341204992,"$color":"#162A34"}, 
	   "id": "Maire Tecnimont Spa", 
	   "name": "Maire Tecnimont Spa"
	 },	 
	 {
	   "data":{"cap":"&#8364;220,955,000","sec": "No","$area": 220955344,"$color":"#1B3238"}, 
	   "id": "Gas Plus", 
	   "name": "Gas Plus"
	 }
   ] 
   };
  //end
  //init TreeMap
  var tm = new $jit.TM.Squarified({
	//where to inject the visualization
	injectInto: 'infovis',

	//parent box title heights
	titleHeight: 0,
	//enable animations
	animate: false,
	//box offsets
	offset: 1,
	//Attach left and right click events
	Events: { enable: false },
	duration: 1000,
	//Enable tips
	Tips: {
	  enable: true,
	  //add positioning offsets
	  offsetX: 20,
	  offsetY: 20,
	  //implement the onShow method to
	  //add content to the tooltip when a node
	  //is hovered
	  onShow: function(tip, node, isLeaf, domElement) {
		var html = "<div class=\"tip-title\">" + node.name 
		  + "</div><div class=\"tip-text\">";
		var data = node.data;
		if(data.cap) {
		  html += "Market Cap: " + data.cap;
		}
		if(data.sec) {
		  html += "<br />SEC Coverage: " + data.sec;
		}
		tip.innerHTML =  html; 
	  }  
	},
	//Add the name of the node in the correponding label
	//This method is called once, on label creation.
	onCreateLabel: function(domElement, node){
//		if (node.data.$width > 10) {
			domElement.innerHTML = node.name;
//		}
		var style = domElement.style;
		style.display = '';
		style.border = '1px solid transparent';
		domElement.onmouseover = function() {
		  style.border = '1px solid #9FD4FF';
		};
		domElement.onmouseout = function() {
		  style.border = '1px solid transparent';
		};
	}
  });
  tm.loadJSON(json);
  tm.refresh();
  //end
  //add events to radio buttons
  var sq = $jit.id('r-sq'),
	  st = $jit.id('r-st'),
	  sd = $jit.id('r-sd');
  var util = $jit.util;
  util.addEvent(sq, 'change', function() {
	if(!sq.checked) return;
	util.extend(tm, new $jit.Layouts.TM.Squarified);
	tm.refresh();
  });
  util.addEvent(st, 'change', function() {
	if(!st.checked) return;
	util.extend(tm, new $jit.Layouts.TM.Strip);
	tm.layout.orientation = "v";
	tm.refresh();
  });
  util.addEvent(sd, 'change', function() {
	if(!sd.checked) return;
	util.extend(tm, new $jit.Layouts.TM.SliceAndDice);
	tm.layout.orientation = "v";
	tm.refresh();
  });
  //add event to the back button
  var back = $jit.id('back');
  $jit.util.addEvent(back, 'click', function() {
	tm.out();
  });
}