// ELabels3.js
//
//   2010-06-10  Port to GoogleMaps V3 API by Pat Horton
//
//   This Javascript was originally provided by Mike Williams
//   Blackpool Community Church Javascript Team
//   http://www.commchurch.freeserve.co.uk/
//   http://econym.googlepages.com/index.htm
//
//   This work is licenced under a Creative Commons Licence
//   http://creativecommons.org/licenses/by/2.0/uk/

function ELabel(map, point, html, classname, pixelOffset,
percentOpacity, overlap) {
        // Mandatory parameters
        this.div_ = null;
        this.map_ = map;
        // Optional parameters
        this.point = point;
        this.html = html;
        this.classname = classname || "";
        this.pixelOffset = pixelOffset || new google.maps.Size(0,0);
        if (percentOpacity) {
			if (percentOpacity < 0)
				percentOpacity = 0;
			if (percentOpacity > 100)
				percentOpacity = 100;
        }
        this.percentOpacity = percentOpacity;
        this.overlap=overlap || false;
        this.hidden = false;
        this.setMap(map);
}

ELabel.prototype = new google.maps.OverlayView();

ELabel.prototype.onAdd = function(){
        var div = document.createElement("div");
        div.style.position = "absolute";
        div.innerHTML = '<div class="' + this.classname + '">' + this.html + '</div>' ;
        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) {
			// you may need to work on this "hack" to replace V2 getZindex
			// GOverlay.getZIndex(this.point.lat());
			var z = 1000 * (90 - this.point.lat());
			this.div_.style.zIndex = parseInt(z);
		}
		if (this.hidden) {
			this.hide();
		}

        // add ourselves to the shadow overlay layer

        var panes = this.getPanes();
        panes.floatShadow.appendChild(div);
}

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

ELabel.prototype.draw = function(force) {
	var proj = this.getProjection();
	var p = proj.fromLatLngToDivPixel(this.point);
	var h = parseInt(this.div_.clientHeight);
	this.div_.style.left = (p.x + this.pixelOffset.width) + "px";
	this.div_.style.top = (p.y + this.pixelOffset.height - h) + "px";
}

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

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

ELabel.prototype.copy = function() {
	return new ELabel(this.point, this.html, this.classname, this.pixelOffset,
			this.percentOpacity, this.overlap);
}

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.redraw(true);
}

ELabel.prototype.setPoint = function(point) {
	this.point = point;
	if (this.overlap) {
		//                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);
	}
	this.redraw(true);
}

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;
}