/*
 * ELabel.js - v3.0.2 - 12/08/2010
 * https://github.com/erunyon/ELabel
 * 
 * Copyright (c) 2010 Erik Runyon
 * Dual licensed under the MIT and GPL licenses.
 * http://weedygarden.net
 */

function ELabel(data) {
	/*
	 data is an object in the following format:
	 new ELabel({
	 	latlng: new google.maps.LatLng(41.700346,-86.238899), 
	 	label: "Foo", 
	 	classname: "label", 
	 	offset: new google.maps.Size(-18, -12), 
	 	opacity: 100, 
	 	overlap: true,
		clicktarget: false
	 });
 */
	
	var data = data;
	
  // Mandatory parameters
  this.point = data.latlng;
  this.html = data.label;
  
  // Optional parameters
  this.classname = data.classname || "";
  this.pixelOffset = data.offset || new google.maps.Size(0,0);
  if (data.opacity) {
    if(data.opacity < 0){data.opacity = 0;}
    if(data.opacity > 100){data.opacity = 100;}
  }        
  this.percentOpacity = data.opacity;
  this.overlap = data.overlap || false;
  this.hidden = false;
	this.clicktarget = (data.clicktarget) ? data.clicktarget : false;
} 

ELabel.prototype = new google.maps.OverlayView;

ELabel.prototype.onAdd = function(map) {
  var div = document.createElement("div");
  div.style.position = "absolute";
  div.innerHTML = '<div class="' + this.classname + '">' + this.html + '</div>' ;
	this.getPanes().floatShadow.appendChild(div);
  this.map_ = map;
  this.div_ = div;
  if(this.percentOpacity) {        
    if(typeof(div.style.filter)=='string'){div.style.filter='alpha(opacity:'+this.percentOpacity+')';}
    if(typeof(div.style.KHTMLOpacity)=='string'){div.style.KHTMLOpacity=this.percentOpacity/100;}
    if(typeof(div.style.MozOpacity)=='string'){div.style.MozOpacity=this.percentOpacity/100;}
    if(typeof(div.style.opacity)=='string'){div.style.opacity=this.percentOpacity/100;}
  }
  if(this.overlap) {
		// This is a work in progress
    // var z = GOverlay.getZIndex(this.point.lat());
    // this.div_.style.zIndex = z;
    var z = 1000*(90-this.point.lat());
    this.div_.style.zIndex = parseInt(z);
  }
  if(this.hidden) {
    this.hide();
  }
	if(this.clicktarget) {
		var target = this.clicktarget;
		
		// Can't get this to work, which would be ideal
		// google.maps.event.addListener(this.div_, 'click', function() {
		// 	google.maps.event.trigger(target, "click");
		// });
		
		if (typeof jQuery != 'undefined') {
			jQuery(this.div_).click(function(){
				google.maps.event.trigger(target, "click");
			});
		}
	}
};

ELabel.prototype.onRemove = function() {
  this.div_.parentNode.removeChild(this.div_);
};

ELabel.prototype.copy = function() {
	return new ELabel({
			latlng: this.point, 
			label: this.html, 
			classname: "label", 
			offset: new google.maps.Size(-18, -12), 
			opacity: 100, 
			overlap: true,
			clicktarget: false
		});
};

ELabel.prototype.draw = function() {
  var proj = this.getProjection(),
  		pos = proj.fromLatLngToDivPixel(this.point);

  this.div_.style.left = (pos.x + this.pixelOffset.width) + "px";
  this.div_.style.top = (pos.y +this.pixelOffset.height) + "px";
};

ELabel.prototype.show = function() {
  if (this.div_) {
    this.div_.style.display="";
    this.draw();
  }
  this.hidden = false;
};

ELabel.prototype.hide = function() {
  if (this.div_) {
    this.div_.style.display="none";
  }
  this.hidden = true;
};

ELabel.prototype.isHidden = function() {
  return this.hidden;
};

ELabel.prototype.supportsHide = function() {
  return true;
};

ELabel.prototype.setContents = function(html) {
  this.html = html;
  this.div_.innerHTML = '<div class="' + this.classname + '">' + this.html + '</div>' ;
  this.draw();
};

// ELabel.prototype.setPoint = function(point) {
//   this.point = point;
//   if (this.overlap) {
//     var z = GOverlay.getZIndex(this.point.lat());
//     this.div_.style.zIndex = z;
//   }
//   this.draw();
// };

ELabel.prototype.setOpacity = function(percentOpacity) {
  if (percentOpacity) {
    if(percentOpacity<0){percentOpacity=0;}
    if(percentOpacity>100){percentOpacity=100;}
  }        
  this.percentOpacity = percentOpacity;
  if (this.percentOpacity) {        
    if(typeof(this.div_.style.filter)=='string'){this.div_.style.filter='alpha(opacity:'+this.percentOpacity+')';}
    if(typeof(this.div_.style.KHTMLOpacity)=='string'){this.div_.style.KHTMLOpacity=this.percentOpacity/100;}
    if(typeof(this.div_.style.MozOpacity)=='string'){this.div_.style.MozOpacity=this.percentOpacity/100;}
    if(typeof(this.div_.style.opacity)=='string'){this.div_.style.opacity=this.percentOpacity/100;}
  }
};

ELabel.prototype.getPoint = function() {
  return this.point;
};