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add displayProjection API Property on the Map, and on relevant controls.

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Spherical mercator example now makes use of this, displaying coordinates 
in lon/lat instead of meters, and permalink/argparser now work in lon/lat
as well. this functionality will make using SphericalMercator easier for
a number of applications. 
r=tschaub (Closes #1036)


git-svn-id: http://svn.openlayers.org/trunk/openlayers@5519 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf
This commit is contained in:
crschmidt
2007-12-19 23:36:34 +00:00
parent 811e35cff3
commit acc8cfc0f2
6 changed files with 117 additions and 14 deletions
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29
lib/OpenLayers/Control/ArgParser.js
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@@ -30,6 +30,20 @@ OpenLayers.Control.ArgParser = OpenLayers.Class(OpenLayers.Control, {
* {Array(<OpenLayers.Layer>)}
*/
layers: null,
/**
* APIProperty: displayProjection
* {<OpenLayers.Projection>} Requires proj4js support.
* Projection used when reading the coordinates from the URL. This will
* reproject the map coordinates from the URL into the map's
* projection.
*
* If you are using this functionality, be aware that any permalink
* which is added to the map will determine the coordinate type which
* is read from the URL, which means you should not add permalinks with
* different displayProjections to the same map.
*/
displayProjection: null,
/**
* Constructor: OpenLayers.Control.ArgParser
@@ -56,6 +70,14 @@ OpenLayers.Control.ArgParser = OpenLayers.Class(OpenLayers.Control, {
var control = this.map.controls[i];
if ( (control != this) &&
(control.CLASS_NAME == "OpenLayers.Control.ArgParser") ) {
// If a second argparser is added to the map, then we
// override the displayProjection to be the one added to the
// map.
if (control.displayProjection != this.displayProjection) {
this.displayProjection = control.displayProjection;
}
break;
}
}
@@ -97,7 +119,12 @@ OpenLayers.Control.ArgParser = OpenLayers.Class(OpenLayers.Control, {
//dont need to listen for this one anymore
this.map.events.unregister('changebaselayer', this,
this.setCenter);
if (this.displayProjection) {
this.center.transform(this.displayProjection,
this.map.getProjectionObject());
}
this.map.setCenter(this.center, this.zoom);
}
},