function GPSPosInterface(map) {
	this.map = map; // map interface object

	this.elFlipper = null;
	this.elDisplay = null;
	this.elArea = null;
	
	this.displayType = 0;
	
	this.lat = 0;
	this.lng = 0;

	this._create = function() {
		this.elFlipper = document.getElementById('gps_pozice_flip');
		this.elDisplay = document.getElementById('gps_span');
		
		this.attachEvents();
		
		this.hide();
	}
	
	this.hide = function() {
		this.elDisplay.style.display = 'none';
	}
	
	this.show = function() {
		this.elDisplay.style.display = 'inline';
	}
	
	this.flip = function() {
		if (this.elDisplay.style.display == 'none') {
			this.show();
		} else {
			this.hide();
		}
	}
	
	this.onClickFlip = function(e) {
		this.flip();
		return false;
	}
	
	this.flipDisplay = function() {
		if (this.displayType == 0) {
			this.displayType = 1;
		} else if (this.displayType == 1) {
			this.displayType = 2;
		} else {
			this.displayType = 0;
		}
		this.updateDisplay();
	}
	
	this.onClickDisplay = function(e) {
		this.flipDisplay();
	}
	
	this.DtoDMS = function(a) {
		var res = Math.floor(a);
		res+= "°";
		var b = (a - Math.floor(a)) * 60;
		res+= (Math.floor(b) < 10)?("0" + Math.floor(b)):(Math.floor(b));
		res+= "'";
		var c = (b - Math.floor(b)) * 60;
		res+= (Math.floor(c) < 10)?("0" + Math.floor(c)):(Math.floor(c));
		res+= '"';

		return res;
	}

	this.DtoDMM = function(a) {
		var res = Math.floor(a);
		res+= "°";
		var b = (a - Math.floor(a)) * 60;
		res+= (Math.floor(b) < 10)?("0" + b.toFixed(3)):(b.toFixed(3));
		res+= "'";

		return res;
	}
	
	this.formatDtoDMS = function(lat, lon) {
		var intAbsLatDeg = Math.floor(Math.abs(lat));
		var fAbsLatMin = (Math.abs(lat) - intAbsLatDeg) * 60;
		var intAbsLatMin = Math.floor(fAbsLatMin);
		var intAbsLatSec = Math.floor((fAbsLatMin - intAbsLatMin) * 60);
		var strLat = intAbsLatDeg + '°' + intAbsLatMin + "'" + intAbsLatSec + '"' + ((lat < 0)?('S'):('N'));
		var intAbsLonDeg = Math.floor(Math.abs(lon));
		var fAbsLonMin = (Math.abs(lon) - intAbsLonDeg) * 60;
		var intAbsLonMin = Math.floor(fAbsLonMin);
		var intAbsLonSec = Math.floor((fAbsLonMin - intAbsLonMin) * 60);
		var strLon = intAbsLonDeg + '°' + intAbsLonMin + "'" + intAbsLonSec + '"' + ((lon < 0)?('W'):('E'));
		var str = strLat + ' ' + strLon;
		
		return str;
	}
	
	this.formatDtoDMf = function(lat, lon) {
		var intAbsLat = Math.floor(Math.abs(lat));
		var strLat = ((lat < 0)?('S'):('N')) + intAbsLat + '°' + ((Math.abs(lat) - intAbsLat) * 60).toFixed(3) + "'";
		var intAbsLon = Math.floor(Math.abs(lon));
		var strLon = ((lon < 0)?('W'):('E')) + intAbsLon + '°' + ((Math.abs(lon) - intAbsLon) * 60).toFixed(3) + "'";
		var str = strLat + ' ' + strLon;
		
		return str;
	}
	
	this.formatDtoDf = function(lat, lon) {
		var str = Math.abs(lat).toFixed(6) + ((lat < 0)?('S'):('N')) + ', ' + Math.abs(lon).toFixed(6) + ((lon < 0)?('W'):('E'));
		
		return str;
	}

	this.updateDisplay = function() {
		if ((this.lat) && (this.lng)) {
			var str = '';
			if (this.displayType == 0) {
				str = "&nbsp;&nbsp;" + this.formatDtoDMS(this.lat, this.lng);
			} else if (this.displayType == 1) {
				str = "&nbsp;&nbsp;" + this.formatDtoDMf(this.lat, this.lng);
			} else if (this.displayType == 2) {
				str = "&nbsp;&nbsp;" + this.formatDtoDf(this.lat, this.lng);
			}
			this.elDisplay.innerHTML = str;
		}
	}
	
	this.onClickMap = function(ev) {
		var ll = this.map.getLatLngFromPixel(ev.xy);
		this.lat = ll.lat;
		this.lng = ll.lng;
		this.updateDisplay();
	}

	this.attachEvents = function() {
		$(this.elFlipper).bind('click', jQuery.proxy(this.onClickFlip, this));
		$(this.elDisplay).bind('click', jQuery.proxy(this.onClickDisplay, this));
		this.map.map.events.register('click', this, this.onClickMap);
	}

	this._create();
}