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Add zoom to/from anchor

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This commit is contained in:
Tom Payne
2012-08-04 16:45:11 +02:00
parent 97eabc8693
commit b7e7a9b3ba
4 changed files with 33 additions and 9 deletions
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33
src/ol/control/control.js
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@@ -80,15 +80,36 @@ ol.Control.prototype.setResolution = function(map, resolution) {
/**
* @param {ol.Map} map Map.
* @param {number|undefined} resolution Resolution.
* @param {number} delta Delta.
* @param {ol.Coordinate=} opt_anchor Anchor.
*/
ol.Control.prototype.zoom = function(map, delta, opt_anchor) {
//if (false && goog.isDef(opt_anchor)) {
// FIXME
//} else {
var resolution = map.getResolution();
ol.Control.prototype.zoom = function(map, resolution, delta, opt_anchor) {
if (goog.isDefAndNotNull(opt_anchor)) {
var mapCenter = /** @type {!ol.Coordinate} */ map.getCenter();
var mapResolution = map.getResolution();
resolution = this.constraints.resolution(resolution, delta);
var center;
if (resolution < mapResolution) {
center = opt_anchor.clone();
center.subtract(mapCenter);
center.scale(resolution / mapResolution);
center.add(mapCenter);
} else if (resolution == mapResolution) {
center = mapCenter;
} else {
center = mapCenter.clone();
center.subtract(opt_anchor);
center.scale(resolution / mapResolution);
center.add(opt_anchor);
}
center = this.constraints.center(center, resolution, ol.Coordinate.ZERO);
map.withFrozenRendering(function() {
map.setCenter(center);
map.setResolution(resolution);
});
} else {
resolution = this.constraints.resolution(resolution, delta);
map.setResolution(resolution);
//}
}
};