Include tests/test_Projection.html and lib/OpenLayers/Projection.js (taken from
projections.2.patch). (Closes #1035) git-svn-id: http://svn.openlayers.org/trunk/openlayers@5405 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf
This commit is contained in:
Frédéric Junod
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/* Copyright (c) 2006-2007 MetaCarta, Inc., published under a modified BSD license.
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* See http://svn.openlayers.org/trunk/openlayers/repository-license.txt
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* for the full text of the license. */
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/**
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* @requires OpenLayers/Util.js
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*
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* Class: OpenLayers.Projection
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* Class for coordinate transformations between coordinate systems.
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* Depends on the proj4js library. If proj4js is not available,
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* then this is just an empty stub.
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*/
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OpenLayers.Projection = OpenLayers.Class({
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/**
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* Constructor: OpenLayers.Projection
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* This class offers several methods for interacting with a wrapped
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* pro4js projection object.
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*
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* Parameters:
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* options - {Object} An optional object with properties to set on the
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* format
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*
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* Returns:
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* {<OpenLayers.Projection>} A projection object.
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*/
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initialize: function(projCode, options) {
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OpenLayers.Util.extend(this, options);
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this.projCode = projCode;
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if (window.Proj4js) {
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this.proj = new Proj4js.Proj(projCode);
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}
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},
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/**
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* APIMethod: getCode
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* Get the string SRS code.
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*
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* Returns:
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* {String} The SRS code.
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*/
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getCode: function() {
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return this.proj ? this.proj.srsCode : this.projCode;
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},
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/**
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* APIMethod: getUnits
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* Get the units string for the projection -- returns null if
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* proj4js is not available.
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*
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* Returns:
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* {String} The units abbreviation.
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*/
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getUnits: function() {
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return this.proj ? this.proj.units : null;
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},
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/**
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* Method: toString
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* Convert projection to string (getCode wrapper).
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*
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* Returns:
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* {String} The projection code.
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*/
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toString: function() {
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return this.getCode();
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},
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/**
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* Method: equals
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* Test equality of two projection instances. Determines equality based
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* soley on the projection code.
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*
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* Returns:
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* {Boolean} The two projections are equivalent.
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*/
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equals: function(projection) {
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if (this.getCode() == projection.getCode()) {
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return true;
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}
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return false;
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},
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/* Method: destroy
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* Destroy projection object.
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*/
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destroy: function() {
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delete this.proj;
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delete this.projCode;
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},
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CLASS_NAME: "OpenLayers.Projection"
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});
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/**
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* APIMethod: transform
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* Read data from a string, and return an object whose type depends on the
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* subclass.
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*
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* Parameters:
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* point - {object} input horizontal coodinate
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* sourceProj - {OpenLayers.Projection} source map coordinate system
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* destProj - {OpenLayers.Projection} destination map coordinate system
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*
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* Returns:
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* point - {object} trasnformed coordinate
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*/
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OpenLayers.Projection.transform = function(point, source, dest) {
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if (source.proj && dest.proj) {
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point = Proj4js.transform(source.proj, dest.proj, point);
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}
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return point;
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};
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@@ -0,0 +1,27 @@
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<html>
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<head>
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<script src="../lib/OpenLayers.js"></script>
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<script type="text/javascript">
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function test_01_Projection_constructor(t) {
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t.plan(7);
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var options = {'foo': 'bar'};
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var projection = new OpenLayers.Projection("code", options);
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t.ok(projection instanceof OpenLayers.Projection,
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"new OpenLayers.Projection returns object" );
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t.eq(projection.projCode, "code", "The proj code is maintained");
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t.eq(projection.getCode(), "code", "The proj code is maintained.");
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t.eq(projection.getUnits(), null, "Null units with no proj4js library.");
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t.eq(projection.foo, "bar", "constructor sets options correctly");
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var projection2 = new OpenLayers.Projection("epsg:4325", options);
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out = OpenLayers.Projection.transform({'x':10,'y':12}, projection, projection2);
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t.eq(out.x, 10, "Null transform has no effect");
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t.eq(out.y, 12, "Null transform has no effect");
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}
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</script>
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</head>
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<body>
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</body>
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</html>
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