// Author: Arnold Andreasson, 2007. http://mellifica.se/konsult
// License: http://creativecommons.org/licenses/by-nc-sa/3.0/
var map;
var markers;
var rt90_meridian;
var sweref99_meridian;

function map_init() {
	map = new OpenLayers.Map('map', { controls: [] });

	var openlayers_wms = new OpenLayers.Layer.WMS.Untiled( 
		"OpenLayers basic", "http://labs.metacarta.com/wms/vmap0", 
		{layers: 'basic'});	
	var ghyb = new OpenLayers.Layer.Google(
		"Google satellite and road map",
		{type: G_HYBRID_MAP, numZoomLevels: 19});
	var gsat = new OpenLayers.Layer.Google(
		"Google satellite map",
		{type: G_SATELLITE_MAP, numZoomLevels: 19});
	var gmap = new OpenLayers.Layer.Google(
		"Google road map",
		{type: G_NORMAL_MAP, numZoomLevels: 19});
	var gphy = new OpenLayers.Layer.Google(
		"Google terrain map",
		{type: G_PHYSICAL_MAP, numZoomLevels: 16});

	map.addLayers([ghyb, gsat, gmap, gphy]);
	map.addLayers([openlayers_wms]);
	
	markers = new OpenLayers.Layer.Markers("Marker");
	rt90_meridian = new OpenLayers.Layer.Boxes("RT 90 Zone");
	rt90_meridian.setVisibility(false);
	sweref99_meridian = new OpenLayers.Layer.Boxes("SWEREF 99 Zone");
	sweref99_meridian.setVisibility(false);
	map.addLayers([markers, rt90_meridian, sweref99_meridian]);	
	map.setCenter(new OpenLayers.LonLat(15, 62.5), 4);

	map.addControl(new OpenLayers.Control.PanZoomBar());
//	map.addControl(new OpenLayers.Control.MouseToolbar());
	map.addControl(new OpenLayers.Control.LayerSwitcher());
	map.addControl(new OpenLayers.Control.MousePosition());
	var overview = new OpenLayers.Control.OverviewMap({ layers: [openlayers_wms.clone()]});
	map.addControl(overview);
//	overview.maximizeControl();	
//	map.addControl(new OpenLayers.Control.KeyboardDefaults());

	map.events.register("click", map, function(e) { 
		var lonlat = map.getLonLatFromViewPortPx(e.xy);
		set_lat_long(lonlat.lat, lonlat.lon);
	});	
}
function show_map_marker(lat, lon) {
	markers.clearMarkers();
	map.setCenter(new OpenLayers.LonLat(lon, lat));
	var url = 'http://latlong.mellifica.se/images/marker-gold.png';
	var sz = new OpenLayers.Size(21, 25);
	var calculateOffset = function(size) {
		return new OpenLayers.Pixel(-(size.w/2), -size.h);
	};           
	var icon = new OpenLayers.Icon(url, sz, null, calculateOffset);
	marker = new OpenLayers.Marker(new OpenLayers.LonLat(lon, lat), icon);
	markers.addMarker(marker);
}
function show_rt90_meridian(projection) {
	var meridian = null;
	var delta = null;
	var bounds = null; 
	if (projection == "rt90_7.5_gon_v") {
		meridian = 11.0 + 18.375/60.0;
		delta = 1.125;
		var bounds = new OpenLayers.Bounds(meridian-delta, 54.94, meridian+delta, 69.1); 
	}
	else if (projection == "rt90_5.0_gon_v") {
		meridian = 13.0 + 33.376/60.0;
		delta = 1.125;
		var bounds = new OpenLayers.Bounds(meridian-delta, 54.94, meridian+delta, 69.1); 
	}
	else if (projection == "rt90_2.5_gon_v") {
		meridian = 15.0 + 48.0/60.0 + 22.624306/3600.0;
		delta = 1.125;
		var bounds = new OpenLayers.Bounds(meridian-delta, 54.94, meridian+delta, 69.1); 
	}
	else if (projection == "rt90_0.0_gon_v") {
		meridian = 18.0 + 3.378/60.0;
		delta = 1.125;
		var bounds = new OpenLayers.Bounds(meridian-delta, 54.94, meridian+delta, 69.1); 
	}
	else if (projection == "rt90_2.5_gon_o") {
		meridian = 20.0 + 18.378/60.0;
		delta = 1.125;
		var bounds = new OpenLayers.Bounds(meridian-delta, 54.94, meridian+delta, 69.1); 
	}
	else if (projection == "rt90_5.0_gon_o") {
		meridian = 22.0 + 33.380/60.0;
		delta = 1.125;
		var bounds = new OpenLayers.Bounds(meridian-delta, 54.94, 24.35, 69.1); // Include Happaranda. 
	}
	
	rt90_meridian.clearMarkers();
	if (bounds != null) {
		var box = new OpenLayers.Marker.Box(bounds);
		box.setBorder("yellow");
		rt90_meridian.addMarker(box);
	}	
	if (projection == "rt90_2.5_gon_v") {
		bounds = new OpenLayers.Bounds(10.7, 54.84, 24.45, 69.2); 
		var box = new OpenLayers.Marker.Box(bounds);
		box.setBorder("yellow");
		rt90_meridian.addMarker(box);
	}

}
function show_sweref99_meridian(projection) {
	var meridian = null;
	var bounds = null; 
	if (projection == "sweref_99_tm") {
		bounds = new OpenLayers.Bounds(10.8, 54.94, 24.35, 69.1); 
	}
	else if (projection == "sweref_99_1200") {
		bounds = new OpenLayers.Bounds(12.00-1.10, 54.94, 12.00+0.75, 69.1); // Include Koster. 
	}
	else if (projection == "sweref_99_1330") {
		meridian = 13.50;
		delta = 0.75;
		bounds = new OpenLayers.Bounds(13.50-0.75, 54.94, 13.50+0.75, 69.1); 
	}
	else if (projection == "sweref_99_1500") {
		meridian = 15.00;
		delta = 0.75;
		bounds = new OpenLayers.Bounds(15.00-0.75, 54.94, 15.00+0.75, 69.1); 
	}
	else if (projection == "sweref_99_1630") {
		meridian = 16.50;
		delta = 0.75;
		bounds = new OpenLayers.Bounds(16.50-0.75, 54.94, 16.50+0.75, 69.1); 
	}
	else if (projection == "sweref_99_1800") {
		meridian = 18.00;
		delta = 0.75;
		bounds = new OpenLayers.Bounds(18.00-0.75, 54.94, 18.00+0.75, 69.1); 
	}
	else if (projection == "sweref_99_1415") {
		meridian = 14.25;
		delta = 0.75;
		bounds = new OpenLayers.Bounds(14.25-0.75, 54.94, 14.25+0.75, 69.1); 
	}
	else if (projection == "sweref_99_1545") {
		meridian = 15.75;
		delta = 0.75;
		bounds = new OpenLayers.Bounds(15.75-0.75, 54.94, 15.75+0.75, 69.1); 
	}
	else if (projection == "sweref_99_1715") {
		meridian = 17.25;
		delta = 0.75;
		bounds = new OpenLayers.Bounds(17.25-0.75, 54.94, 17.25+0.75, 69.1); 
	}
	else if (projection == "sweref_99_1845") {
		meridian = 18.75;
		delta = 0.75;
		bounds = new OpenLayers.Bounds(18.75-0.75, 54.94, 18.75+0.75, 69.1); 
	}
	else if (projection == "sweref_99_2015") {
		meridian = 20.25;
		delta = 0.75;
		bounds = new OpenLayers.Bounds(20.25-0.75, 54.94, 20.25+0.75, 69.1); 
	}
	else if (projection == "sweref_99_2145") {
		meridian = 21.75;
		delta = 0.75;
		bounds = new OpenLayers.Bounds(21.75-0.75, 54.94, 21.75+0.75, 69.1); 
	}
	else if (projection == "sweref_99_2315") {
		meridian = 23.25;
		delta = 0.75;
		bounds = new OpenLayers.Bounds(23.25-0.75, 54.94, 24.25, 69.1); // Include Happaranda.
	}
	
	sweref99_meridian.clearMarkers();
	if (bounds != null) {
		var box = new OpenLayers.Marker.Box(bounds);
		box.setBorder("red");
		sweref99_meridian.addMarker(box);
	}	
}