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patch for #487 -- dateline wrapping

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git-svn-id: http://svn.openlayers.org/trunk/openlayers@3323 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf
This commit is contained in:
euzuro
2007-06-12 18:03:59 +00:00
parent 76f9234e3b
commit f56f136523
13 changed files with 519 additions and 25 deletions
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26
lib/OpenLayers/Map.js
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@@ -1168,8 +1168,30 @@ OpenLayers.Map.prototype = {
* @param {OpenLayers.Bounds} bounds
*/
zoomToExtent: function(bounds) {
this.setCenter(bounds.getCenterLonLat(),
this.getZoomForExtent(bounds));
var center = bounds.getCenterLonLat();
if (this.baseLayer.wrapDateLine) {
var maxExtent = this.getMaxExtent();
//fix straddling bounds (in the case of a bbox that straddles the
// dateline, it's left and right boundaries will appear backwards.
// we fix this by allowing a right value that is greater than the
// max value at the dateline -- this allows us to pass a valid
// bounds to calculate zoom)
//
bounds = bounds.clone();
while (bounds.right < bounds.left) {
bounds.right += maxExtent.getWidth();
}
//if the bounds was straddling (see above), then the center point
// we got from it was wrong. So we take our new bounds and ask it
// for the center. Because our new bounds is at least partially
// outside the bounds of maxExtent, the new calculated center
// might also be. We don't want to pass a bad center value to
// setCenter, so we have it wrap itself across the date line.
//
center = bounds.getCenterLonLat().wrapDateLine(maxExtent);
}
this.setCenter(center, this.getZoomForExtent(bounds));
},
/** Zoom to the full extent and recenter.