Add MapServer Untiled Layer to OpenLayers. Originally developed by Steve
Woodbridge, tests written by Paul Spencer and some reworking done. Thanks to both Paul and Steve for this code. (Closes #526.) git-svn-id: http://svn.openlayers.org/trunk/openlayers@2891 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf
This commit is contained in:
crschmidt
26
examples/mapserver_untiled.html
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26
examples/mapserver_untiled.html
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@@ -0,0 +1,26 @@
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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: 800px;
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height: 475px;
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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 src="../lib/OpenLayers/Layer/MapServer/Untiled.js"></script>
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<script type="text/javascript">
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window.onload = function(){
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var map = new OpenLayers.Map( 'map', {maxResolution: 'auto'} );
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var layer = new OpenLayers.Layer.MapServer.Untiled( "MapServer Untiled",
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"http://labs.metacarta.com/wms/vmap0", {layers: 'basic'} );
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map.addLayer(layer);
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map.setCenter(new OpenLayers.LonLat(0, 0), 1);
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map.addControl( new OpenLayers.Control.LayerSwitcher() );
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}
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</script>
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</head>
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<body>
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<div id="map"></div>
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</body>
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</html>
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@@ -79,6 +79,7 @@ if (typeof(_OPENLAYERS_SFL_) == "undefined") {
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"OpenLayers/Layer/HTTPRequest.js",
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"OpenLayers/Layer/Grid.js",
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"OpenLayers/Layer/MapServer.js",
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"OpenLayers/Layer/MapServer/Untiled.js",
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"OpenLayers/Layer/KaMap.js",
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"OpenLayers/Layer/MultiMap.js",
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"OpenLayers/Layer/Markers.js",
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237
lib/OpenLayers/Layer/MapServer/Untiled.js
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237
lib/OpenLayers/Layer/MapServer/Untiled.js
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@@ -0,0 +1,237 @@
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/* Copyright (c) 2006-2007 MetaCarta, Inc., published under the BSD license.
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* See http://svn.openlayers.org/trunk/openlayers/release-license.txt
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* for the full text of the license. */
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/* Derived from the WMS/Untiled.js script by Stephen Woodbridge, 2007 */
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/**
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* @class
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*
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* @requires OpenLayers/Layer/HTTPRequest.js
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* @requires OpenLayers/Layer/MapServer.js
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*/
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OpenLayers.Layer.MapServer.Untiled = OpenLayers.Class.create();
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OpenLayers.Layer.MapServer.Untiled.prototype =
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OpenLayers.Class.inherit( OpenLayers.Layer.HTTPRequest, {
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/** Hashtable of default parameter key/value pairs
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* @final @type Object */
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default_params: {
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mode: "map",
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map_imagetype: "png"
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},
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reproject: true,
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/** the ratio of image/tile size to map size (this is the untiled buffer)
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* @type int */
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ratio: 1,
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/** @type OpenLayers.Tile.Image */
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tile: null,
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/** did the image finish loading before a new draw was initiated?
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* @type Boolean */
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doneLoading: false,
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/**
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* @constructor
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*
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* @param {String} name
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* @param {String} url
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* @param {Object} params
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*/
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initialize: function(name, url, params, options) {
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var newArguments = [];
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newArguments.push(name, url, params, options);
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OpenLayers.Layer.HTTPRequest.prototype.initialize.apply(this,
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newArguments);
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OpenLayers.Util.applyDefaults(
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this.params,
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this.default_params
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);
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// unless explicitly set in options, if the layer is transparent,
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// it will be an overlay
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if ((options == null) || (options.isBaseLayer == null)) {
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this.isBaseLayer = ((this.params.transparent != "true") &&
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(this.params.transparent != true));
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}
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},
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/**
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*
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*/
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destroy: function() {
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if (this.tile) {
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this.tile.destroy();
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this.tile = null;
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}
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OpenLayers.Layer.HTTPRequest.prototype.destroy.apply(this, arguments);
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},
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/**
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* @param {Object} obj
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*
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* @returns An exact clone of this OpenLayers.Layer.MapServer.Untiled
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* @type OpenLayers.Layer.MapServer.Untiled
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*/
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clone: function (obj) {
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if (obj == null) {
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obj = new OpenLayers.Layer.MapServer.Untiled(this.name,
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this.url,
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this.params,
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this.options);
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}
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//get all additions from superclasses
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obj = OpenLayers.Layer.HTTPRequest.prototype.clone.apply(this, [obj]);
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// copy/set any non-init, non-simple values here
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return obj;
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},
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/** Once HTTPRequest has set the map, we can load the image div
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*
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* @param {OpenLayers.Map} map
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*/
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setMap: function(map) {
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OpenLayers.Layer.HTTPRequest.prototype.setMap.apply(this, arguments);
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},
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/** When it is not a dragging move (ie when done dragging)
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* reload and recenter the div.
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*
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* @param {OpenLayers.Bounds} bounds
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* @param {Boolean} zoomChanged
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* @param {Boolean} dragging
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*/
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moveTo:function(bounds, zoomChanged, dragging) {
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if (!this.doneLoading) {
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this.events.triggerEvent("loadcancel");
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this.doneLoading = true;
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}
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OpenLayers.Layer.HTTPRequest.prototype.moveTo.apply(this,arguments);
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if (bounds == null) {
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bounds = this.map.getExtent();
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}
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var firstRendering = (this.tile == null);
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//does the new bounds to which we need to move fall outside of the
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// current tile's bounds?
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var outOfBounds = (!firstRendering &&
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!this.tile.bounds.containsBounds(bounds));
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if ( zoomChanged || firstRendering || (!dragging && outOfBounds) ) {
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//clear out the old tile
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if (this.tile) {
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this.tile.clear();
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}
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//determine new tile bounds
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var center = bounds.getCenterLonLat();
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var tileWidth = bounds.getWidth() * this.ratio;
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var tileHeight = bounds.getHeight() * this.ratio;
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var tileBounds =
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new OpenLayers.Bounds(center.lon - (tileWidth / 2),
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center.lat - (tileHeight / 2),
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center.lon + (tileWidth / 2),
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center.lat + (tileHeight / 2));
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//determine new tile size
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var tileSize = this.map.getSize();
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tileSize.w = tileSize.w * this.ratio;
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tileSize.h = tileSize.h * this.ratio;
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//formulate request url string
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var url = this.getURL(tileBounds);
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//determine new position (upper left corner of new bounds)
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var ul = new OpenLayers.LonLat(tileBounds.left, tileBounds.top);
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var pos = this.map.getLayerPxFromLonLat(ul);
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if ( this.tile && !this.tile.size.equals(tileSize)) {
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this.tile.destroy();
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this.tile = null;
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}
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this.events.triggerEvent("loadstart");
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this.doneLoading = false;
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if (!this.tile) {
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this.tile = new OpenLayers.Tile.Image(this, pos, tileBounds,
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url, tileSize);
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this.tile.draw();
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var onload = function() {
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this.doneLoading = true;
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this.events.triggerEvent("loadend");
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}
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OpenLayers.Event.observe(this.tile.imgDiv, 'load',
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onload.bindAsEventListener(this));
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} else {
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this.tile.moveTo(tileBounds, pos);
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}
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}
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},
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getURL: function(bounds) {
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var tileSize = this.map.getSize();
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tileSize.w = tileSize.w * this.ratio;
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tileSize.h = tileSize.h * this.ratio;
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var url = this.getFullRequestString(
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{mapext:bounds.toBBOX().replace(/,/g," "),
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imgext:bounds.toBBOX().replace(/,/g," "),
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map_size:tileSize.w+' '+tileSize.h,
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imgx: tileSize.w/2,
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imgy: tileSize.h/2,
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imgxy: tileSize.w+" "+tileSize.h
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});
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return url;
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},
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/** Once HTTPRequest has updated the url, reload the image div
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* @param {String} newUrl
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*/
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setUrl: function(newUrl) {
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OpenLayers.Layer.HTTPRequest.prototype.setUrl.apply(this, arguments);
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this.moveTo();
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},
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/** Once HTTPRequest has updated new params, reload the image div
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* @param {Object} newParams
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*/
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mergeNewParams:function(newParams) {
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OpenLayers.Layer.HTTPRequest.prototype.mergeNewParams.apply(this,
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[newParams]);
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//redraw
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this.moveTo(null, true);
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},
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/** combine the layer's url with its params and these newParams.
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*
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* Add the SRS parameter from 'projection' -- this is probably
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* more eloquently done via a setProjection() method, but this
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* works for now and always.
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*
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* @param {Object} newParams
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*
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* @type String
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*/
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getFullRequestString:function(newParams) {
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var projection = this.map.getProjection();
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this.params.srs = (projection == "none") ? null : projection;
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return OpenLayers.Layer.Grid.prototype.getFullRequestString.apply(
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this, arguments);
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},
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/** @final @type String */
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CLASS_NAME: "OpenLayers.Layer.MapServer.Untiled"
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});
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163
tests/Layer/test_MapServer_Untiled.html
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163
tests/Layer/test_MapServer_Untiled.html
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@@ -0,0 +1,163 @@
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<html>
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<head>A
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<script src="../../lib/OpenLayers.js"></script>
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<script type="text/javascript"><!--
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var isMozilla = (navigator.userAgent.indexOf("compatible") == -1);
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var layer;
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var name = 'Test Layer';
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var url = "http://labs.metacarta.com/cgi-bin/mapserv";
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var params = { map: '/mapdata/vmap_wms.map',
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Alayers: 'basic'};
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function test_01_Layer_MapServer_Untiled_constructor (t) {
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t.plan( 4 );
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var url = "http://labs.metacarta.com/cgi-bin/mapserv";
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layer = new OpenLayers.Layer.MapServer.Untiled(name, url, params);
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t.ok( layer instanceof OpenLayers.Layer.MapServer.Untiled, "new OpenLayers.Layer.MapServer returns object" );
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t.eq( layer.url, "http://labs.metacarta.com/cgi-bin/mapserv", "layer.url is correct (HTTPRequest inited)" );
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t.eq( layer.params.mode, "map", "default mode param correctly copied");
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t.eq( layer.params.map_imagetype, "png", "default imagetype correctly copied");
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}
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function test_04_Layer_MapServer_Untiled_clone (t) {
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t.plan(3);
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var url = "http://labs.metacarta.com/cgi-bin/mapserv";
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var map = new OpenLayers.Map('map', {});
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layer = new OpenLayers.Layer.MapServer.Untiled(name, url, params);
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map.addLayer(layer);
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var clone = layer.clone();
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layer.tile = [[1,2],[3,4]];
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t.ok( clone.tile != layer.tile, "clone does not copy tile");
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layer.ratio += 1;
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t.eq( clone.ratio, 1, "changing layer.ratio does not change clone.ratio -- a fresh copy was made, not just copied reference");
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t.eq( clone.alpha, layer.alpha, "alpha copied correctly");
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layer.tile = null;
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}
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function test_05_Layer_MapServer_Untiled_isBaseLayer(t) {
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t.plan(3);
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var url = "http://labs.metacarta.com/cgi-bin/mapserv";
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layer = new OpenLayers.Layer.MapServer.Untiled(name, url, params);
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t.ok( layer.isBaseLayer, "baselayer is true by default");
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var newParams = OpenLayers.Util.extend(new Object(), params);
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newParams.transparent = "true";
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layer = new OpenLayers.Layer.MapServer.Untiled(name, url, newParams);
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t.ok( !layer.isBaseLayer, "baselayer is false when transparent is set to true");
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layer = new OpenLayers.Layer.MapServer.Untiled(name, url, params, {isBaseLayer: false});
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t.ok( !layer.isBaseLayer, "baselayer is false when option is set to false" );
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}
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function test_06_Layer_MapServer_Untiled_mergeNewParams (t) {
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t.plan( 5 );
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var map = new OpenLayers.Map("map");
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var url = "http://labs.metacarta.com/cgi-bin/mapserv";
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layer = new OpenLayers.Layer.MapServer.Untiled(name, url, params);
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var newParams = { layers: 'sooper',
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chickpeas: 'image/png'};
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map.addLayer(layer);
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map.zoomToMaxExtent();
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t.ok( !layer.tile.url.match("chickpeas"), "chickpeas is not in URL of first tile in grid" );
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layer.mergeNewParams(newParams);
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t.eq( layer.params.layers, "sooper", "mergeNewParams() overwrites well");
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t.eq( layer.params.chickpeas, "image/png", "mergeNewParams() adds well");
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t.ok( layer.tile.url.match("chickpeas"), "chickpeas is in URL of first tile in grid" );
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newParams.chickpeas = 151;
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t.eq( layer.params.chickpeas, "image/png", "mergeNewParams() makes clean copy of hashtable");
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}
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function test_07_Layer_MapServer_Untiled_getFullRequestString (t) {
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t.plan( 1 );
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var map = new OpenLayers.Map('map');
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tUrl = "http://labs.metacarta.com/cgi-bin/mapserv";
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tParams = { layers: 'basic',
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format: 'png'};
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var tLayer = new OpenLayers.Layer.MapServer.Untiled(name, tUrl, tParams);
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map.addLayer(tLayer);
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str = tLayer.getFullRequestString();
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var tParams = {
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layers: 'basic',
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format: 'png',
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mode: 'map',
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map_imagetype: 'png',
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srs: 'EPSG:4326'
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};
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var sStr = tUrl + "?" + OpenLayers.Util.getParameterString(tParams);
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sStr = sStr.replace(/,/g, "+");
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t.eq(str, sStr , "getFullRequestString() works");
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}
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function test_08_Layer_MapServer_Untiled_setOpacity (t) {
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t.plan( 4 );
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var map = new OpenLayers.Map('map');
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map.projection = "xx";
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tUrl = "http://labs.metacarta.com/cgi-bin/mapserv";
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tParams = { layers: 'basic',
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format: 'image/png'};
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tOptions = { 'opacity': '0.5' };
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var tLayer = new OpenLayers.Layer.MapServer.Untiled(name, tUrl, tParams, tOptions);
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map.addLayer(tLayer);
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map.zoomToMaxExtent();
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t.eq(tLayer.opacity, "0.5", "Opacity is set correctly");
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t.eq(parseFloat(tLayer.div.firstChild.style.opacity), 0.5, "Opacity on tile is correct");
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tLayer.setOpacity("0.6");
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t.eq(tLayer.opacity, "0.6", "setOpacity works properly");
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t.eq(parseFloat(tLayer.div.firstChild.style.opacity), 0.6, "Opacity on tile is changed correctly");
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}
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function test_99_Layer_MapServer_Untiled_destroy (t) {
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t.plan( 1 );
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var map = new OpenLayers.Map('map');
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layer = new OpenLayers.Layer.MapServer.Untiled(name, url, params);
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map.addLayer(layer);
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map.setCenter(new OpenLayers.LonLat(0,0), 5);
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//grab a reference to one of the tiles
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var tile = layer.tile;
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layer.destroy();
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// checks to make sure superclass (grid) destroy() was called
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t.ok( layer.tile == null, "tile set to null");
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}
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// -->
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</script>
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</head>
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<body>
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<div id="map" style="width:256px;height:256px"></div>
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</body>
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</html>
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@@ -35,6 +35,7 @@
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<li>Layer/test_KaMap.html</li>
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<li>Layer/test_Markers.html</li>
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<li>Layer/test_Multimap.html</li>
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<li>Layer/test_MapServer_Untiled.html</li>
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<li>Layer/test_Text.html</li>
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<li>Layer/test_WMS.html</li>
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<li>Layer/test_TMS.html</li>
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Reference in New Issue
Block a user