//	MapTooltip Class, Version 1.0
//	@copyright (c) 2009 Gabriel Svennerberg (svennerberg.com)
//
//	Author:		Gabriel Svennerberg
//	Email:		gabriel@svennerberg.com
//	Web:		http://www.svennerberg.com
//
//	Licensed under the Apache License, Version 2.0 (the "License");
//	you may not use this file except in compliance with the License.
//	You may obtain a copy of the License at
//	
//		http://www.apache.org/licenses/LICENSE-2.0
//	
//	Unless required by applicable law or agreed to in writing, software
//	distributed under the License is distributed on an "AS IS" BASIS,
//	WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
//	See the License for the specific language governing permissions and
//	limitations under the License. 
// 
//	Subclassed GOverlay
//
//	Adds tooltip as an overlay to objects in Google maps. So far it's been tested with 
//	GMarkers, GPolyLines and GPolygons
//
//	To get it to work it assumes that you've loaded the Google Maps Api
//
//	The constructor takes two reguierd parameters and one optional
//
//		MapTooltip(reference:object, tooltip:string, opts?:object)
//
//	opts is an object literal which take the following parameters
//
//		width				The width of the tooltip, ex: "100px"
//		padding				the padding around the content of the tooltip
//							For a 3px padding: "3px"
//							For a 2px top/bottom padding and a 5px left/right padding: "2px 5px"
//
//		backgroundColor		Backgroundcolor of the tooltip, ex: "#ff9"
//		color				The color of the text inside the tooltip, ex: "#000"
//		border				Styling of the border of the tooltip, ex: "1px solid green"
//		fontSize			The size of the text inside the tooltip, ex "1em"
//		offsetX				The horizontal distance in pixels from the pointer to the tooltip, ex "10"
//		offsetY				The vertical distance in piexels from the pointer to the tooltip, ex: "10"
//
//	For more information on how to use this extension se http://www.svennerberg.com/2009/03/announcing-maptooltip/
//
//	This extension is heavily inspired by the article "custom info window / popup for Google Maps, or loving the goverlay" at http://danmarvelo.us/older/2007/9/10/custom-info-window-for-google/

var MapTooltip = function(obj, html, options) {
	this.obj = obj;
	this.html = html;
	this.options = options || {};
}

MapTooltip.prototype = new GOverlay();

MapTooltip.prototype.initialize = function(map) {
	var div = document.getElementById('MapTooltipContainer');

	if (!div) {
		var div = document.createElement('div');
		div.setAttribute('id', 'MapTooltipContainer');
	}
	
	// Setting the apperance of the tooltip
	if (this.options.maxWidth || this.options.minWidth) {
		div.style.maxWidth = this.options.maxWidth || '150px';
		div.style.minWidth = this.options.minWidth || '150px';
	} else {
		div.style.width = this.options.width || '150px';
	}
	
	div.style.padding = this.options.padding || '3px 5px';
	div.style.backgroundColor = this.options.backgroundColor || '#ff9';
	div.style.border = this.options.border || '1px solid #fc0';
	div.style.fontSize = this.options.fontSize || '80%';
	div.style.color = this.options.color || '#000';
	
	// Positioning the tooltip
	div.innerHTML = this.html;
	div.style.position = 'absolute';
	div.style.zIndex = '1000';

	var offsetX = this.options.offsetX || 10;
	var offsetY = this.options.offsetY || 0;


	// Because GPolyLine and GPolygon mousemove event doesn't return the mouseposition, we need to get it
	// in some other way. Since GMap2 returns the mouseposition on mousemove we use that.
	var mapev = GEvent.addListener(map, 'mousemove', function(latlng) {
		GEvent.removeListener(mapev);

		var pixelPosX = (map.fromLatLngToDivPixel(latlng)).x + offsetX;
		var pixelPosY = (map.fromLatLngToDivPixel(latlng)).y - offsetY;

		div.style.left = pixelPosX + 'px';
		div.style.top = pixelPosY + 'px';

		map.getPane(G_MAP_FLOAT_PANE).appendChild(div);
		
	});

	this._map = map;
	this._div = div;
}

MapTooltip.prototype.remove = function() {
	if(this._div != null) {
		this._div.parentNode.removeChild(this._div);	
	}
}

MapTooltip.prototype.redraw = function(force) {
	//not implemented
}