Commit a 'changeParams' method, along with test and example, to show how it would be possible to use WMS-T with changeParams. ChangeParams sets the new params, then recalls initTiles with the new params set.
git-svn-id: http://svn.openlayers.org/trunk/openlayers@843 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf
This commit is contained in:
crschmidt
@@ -0,0 +1,42 @@
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<html xmlns="http://www.w3.org/1999/xhtml">
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<head>
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<style type="text/css">
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#map {
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width: 512px;
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height: 400px;
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border: 1px solid black;
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}
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</style>
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<script src="../lib/OpenLayers.js"></script>
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<script type="text/javascript">
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<!--
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var map,ia_wms;
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function init(){
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map = new OpenLayers.Map('map');
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var ol_wms = new OpenLayers.Layer.WMS( "OpenLayers WMS",
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"http://labs.metacarta.com/wms/vmap0?", {layers: 'basic'} );
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var jpl_wms = new OpenLayers.Layer.WMS( "NASA Global Mosaic",
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"http://wms.jpl.nasa.gov/wms.cgi",
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{layers: "modis,global_mosaic"});
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ia_wms = new OpenLayers.Layer.WMS("Nexrad","http://mesonet.agron.iastate.edu/cgi-bin/wms/nexrad/n0r.cgi?",{layers:"nexrad-n0r-wmst",transparent:true,format:'image/png',time:document.getElementById('time').value});
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jpl_wms.setVisibility(false);
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map.addLayers([ol_wms, jpl_wms, ia_wms]);
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map.addControl(new OpenLayers.Control.LayerSwitcher());
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map.zoomToMaxExtent();
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}
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// -->
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</script>
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</head>
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<body onload="init()">
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<h1>OpenLayers Example</h1>
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<p>WMS-T example: update the times, and the radar image will change. Uses Layer.changeParams. Thanks to Howard Butler for the inspiration, the original code, and the kick in the butt!</p>
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<input type='text' id='time' value="2005-08-29T13:00:00Z" onChange='ia_wms.changeParams({"time":this.value});' >
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<div id="map"></div>
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</body>
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</html>
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@@ -309,6 +309,16 @@ OpenLayers.Layer.Grid.prototype = Object.extend( new OpenLayers.Layer(), {
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addTile:function(bounds,position) {
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addTile:function(bounds,position) {
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// Should be implemented by subclasses
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// Should be implemented by subclasses
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},
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},
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/**
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* changeParams is designed to allow you to change the
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* parameters of a layer after it's created.
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* @param {Object} params Hash of new params to use
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*/
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changeParams:function(params) {
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this.params = Object.extend(this.params, OpenLayers.Util.upperCaseObject(params));
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this._initTiles();
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},
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/**
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/**
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* @returns Degrees per Pixel
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* @returns Degrees per Pixel
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@@ -92,6 +92,17 @@ OpenLayers.Layer.WMS.Untiled.prototype =
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tile.draw();
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tile.draw();
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}
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}
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},
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},
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/**
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* changeParams is designed to allow you to change the
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* parameters of a layer after it's created.
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* @param {Object} params Hash of new params to use
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*/
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changeParams:function(params) {
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this.params = Object.extend(this.params, OpenLayers.Util.upperCaseObject(params));
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this._initTiles();
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},
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/** @final @type String */
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/** @final @type String */
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CLASS_NAME: "OpenLayers.Layer.WMS.Untiled"
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CLASS_NAME: "OpenLayers.Layer.WMS.Untiled"
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});
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});
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@@ -50,6 +50,21 @@
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t.eq( layer.grid.length, 4, "Grid rows is correct." );
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t.eq( layer.grid.length, 4, "Grid rows is correct." );
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t.eq( layer.grid[0].length, 2, "Grid cols is correct." );
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t.eq( layer.grid[0].length, 2, "Grid cols is correct." );
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}
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function test_03_Layer_WMS_changeParams (t) {
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t.plan( 4 );
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var map = new OpenLayers.Map($('map'));
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layer = new OpenLayers.Layer.WMS('Test Layer', "http://octo.metacarta.com/cgi-bin/mapserv", {map: '/mapdata/vmap_wms.map', layers: 'basic', format: 'image/jpeg'});
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map.addLayer(layer);
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map.setCenter(new OpenLayers.LonLat(0,0),5);
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t.eq( layer.params.MAP, "/mapdata/vmap_wms.map", "Map param set to original." );
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layer.changeParams({'map':'newparam'});
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t.eq( layer.params.MAP, "newparam", "Map param changed.");
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layer.changeParams({'MAP':'newparam2'});
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t.eq( layer.params.MAP, "newparam2", "Map param changed again with upper-case.");
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var firstChild = layer.div.firstChild;
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t.eq( firstChild.src, "http://octo.metacarta.com/cgi-bin/mapserv?MAP=newparam2&LAYERS=basic&FORMAT=image/jpeg&SERVICE=WMS&VERSION=1.1.1&REQUEST=GetMap&STYLES=&EXCEPTIONS=application/vnd.ogc.se_inimage&SRS=EPSG:4326&BBOX=-11.25,11.25,0,22.5&WIDTH=256&HEIGHT=256", "div first child is correct image object after param change." );
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}
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}
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function test_99_Layer_WMS_destroy (t) {
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function test_99_Layer_WMS_destroy (t) {
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