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Move getZoomForExtent from WMS to Grid. This also applies to WorldWind and KaMap, so having it in Grid.js means we can use it in more cases where it will matter.

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git-svn-id: http://svn.openlayers.org/trunk/openlayers@820 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf
This commit is contained in:
crschmidt
2006-06-28 02:51:37 +00:00
parent 69c599b881
commit dcb0f24f50
2 changed files with 28 additions and 43 deletions
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43
lib/OpenLayers/Layer/WMS.js
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@@ -89,49 +89,6 @@ OpenLayers.Layer.WMS.prototype =
url, this.tileSize);
},
/**
* @returns Degrees per Pixel
* @type float
*/
getResolution: function() {
var maxRes = this.map.getMaxResolution();
var zoom = this.map.getZoom();
return maxRes / Math.pow(2, zoom);
},
/**
* @param {OpenLayers.Bounds} bounds
*
* @return {int}
*/
getZoomForExtent: function (bounds) {
var maxRes = this.map.getMaxResolution();
var viewSize = this.map.getSize();
var width = bounds.getWidth();
var height = bounds.getHeight();
var degPerPixel = (width > height) ? width / viewSize.w
: height / viewSize.h;
var zoom = Math.floor( (Math.log(maxRes/degPerPixel)) / Math.log(2) );
var maxZoomLevel = this.map.getMaxZoomLevel();
var minZoomLevel = this.map.getMinZoomLevel();
//make sure zoom is within bounds
zoom = Math.min( Math.max(zoom, minZoomLevel),
maxZoomLevel );
return zoom;
},
/** @final @type String */
CLASS_NAME: "OpenLayers.Layer.WMS"
});