Metacat

// global variables for the map

var map;

var control;

function initMap(GEOSERVER_URL, SERVLET_URL, qformat, bounds, additionalLayers) {

	if (!bounds) {

		bounds = new OpenLayers.Bounds(-180,-90,180,90);

	}

    map = new OpenLayers.Map('map', { 'maxExtent':bounds, 'maxResolution':'auto'});

    var metacat_points = new OpenLayers.Layer.WMS( "Metacat Doc Points",

        GEOSERVER_URL + "/wms",

        {layers: "data_points",

         transparent: "true", format: "image/gif"} );

    var metacat_bounds = new OpenLayers.Layer.WMS( "Metacat Doc Bounds",

    	GEOSERVER_URL + "/wms",

        {layers: "data_bounds",

         transparent: "true", format: "image/gif"} );

    var world_borders = new OpenLayers.Layer.WMS( "World Borders",

    	GEOSERVER_URL + "/wms",

        {layers: "world_borders",

         format: "image/jpeg"} );

    var ol_wms = new OpenLayers.Layer.WMS( "OpenLayers WMS", 

        "http://labs.metacarta.com/wms/vmap0",

        {layers: 'basic'} );

    var demis = new OpenLayers.Layer.WMS( "Demis World Map",

        "http://www2.demis.nl/WMS/wms.asp?wms=WorldMap",

        {layers: 'Bathymetry,Countries,Topography,Hillshading,Coastlines,Waterbodies,Inundated,Rivers,Streams,Builtup+areas,Railroads,Highways,Roads,Trails,Borders,Cities,Settlements,Airports'} );

	map.addLayers([demis, ol_wms, world_borders, metacat_points, metacat_bounds]);	

	// perhaps a skin has added more layers

	if (additionalLayers) {

		map.addLayers(additionalLayers);

	}

    // off by default

	metacat_bounds.setVisibility(false);

    // get the drag box event

	//control = new OpenLayers.Control();

	control = new OpenLayers.Control({title: "Metacat spatial query", displayClass: "spatialQuery"});

	OpenLayers.Util.extend(

			control, {

			    draw: function () {

			        // this Handler.Box will intercept the shift-mousedown

			        // before Control.MouseDefault gets to see it

			        this.box = new OpenLayers.Handler.Box( control,

			        		{"done": this.notice}

                            //,{keyMask: OpenLayers.Handler.MOD_SHIFT}

			        		);

			        this.box.activate();

			    },

			    notice: function (bounds) {

			    	var min_px;

			        var max_px;

			        // check that it is a rectangle

			        if (bounds.left) { 

				        min_px = new OpenLayers.Pixel( bounds.left, bounds.bottom);

				        max_px = new OpenLayers.Pixel( bounds.right, bounds.top);

					} else {

						var tolerance = new OpenLayers.Pixel(3, 3);

					    min_px = new OpenLayers.Pixel( bounds.x - tolerance.x, bounds.y + tolerance.y);

					    max_px = new OpenLayers.Pixel( bounds.x + tolerance.x, bounds.y - tolerance.y);

					}

			        var min_ll = map.getLonLatFromPixel(min_px);

			        var max_ll = map.getLonLatFromPixel(max_px);

			      	//alert("longitude: " + round(mid_ll.lon,3) + " , latitude: " + round(mid_ll.lat,3) );

				    url = SERVLET_URL + '?action=spatial_query&xmin='+min_ll.lon+'&ymin='+min_ll.lat+'&xmax='+max_ll.lon+'&ymax='+max_ll.lat+'&skin=' + qformat;

				    OpenLayers.ProxyHost = '';

				    newwindow = 

					    window.open(

							    url,

							    'queryWin',

				                'height=600,width=800,status=yes,toolbar=yes,menubar=no,location=yes,resizable=yes,scrollbars=yes');

			    }

	});

	var tb = OpenLayers.Class(OpenLayers.Control.NavToolbar, {

		initialize: function() {

			var options = null;

			OpenLayers.Control.Panel.prototype.initialize.apply(this, [options]);

			this.addControls([

			                  new OpenLayers.Control.Navigation({'zoomWheelEnabled': false}),

			                  new OpenLayers.Control.ZoomBox(),

			                  control

			                  ]);

		}

	});

	map.addControl(new tb());

	//map.addControl(control);

	// some built-in controls

	//map.addControl(new OpenLayers.Control.NavToolbar());

	map.addControl(new OpenLayers.Control.LayerSwitcher());

	map.addControl(new OpenLayers.Control.MousePosition());

	// zoom to center

    if (!map.getCenter()) {

         map.zoomToMaxExtent();

    }

}

// for named location navigation

function zoomToLocation(locations) {

	var selectedLocation = locations.options[locations.selectedIndex].value;

	// add a comma for the rectangle

	selectedLocation = selectedLocation.replace(" ", ",")

	var bounds = OpenLayers.Bounds.fromString(selectedLocation);

    map.zoomToExtent(bounds);

}