ashatora/openlayers
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

Nice improvement of the wheel zooming experience.

Browse Source
This commit is contained in:
ahocevar
2012-07-08 20:27:10 +02:00
parent 4132ded263
commit 7bf1ffe606
1 changed files with 17 additions and 6 deletions
Download Patch File Download Diff File Expand all files Collapse all files

23
src/ol/control/Navigation.js
View File

@@ -20,6 +20,12 @@ ol.control.Navigation = function(opt_autoActivate) {
this.autoActivate_ =
goog.isDef(opt_autoActivate) ? opt_autoActivate : true;
/**
* @type {number?}
* @private
*/
this.zoomBlocked_ = null;
};
goog.inherits(ol.control.Navigation, ol.control.Control);
@@ -57,12 +63,17 @@ ol.control.Navigation.prototype.moveMap = function(evt) {
* @param {Event} evt
*/
ol.control.Navigation.prototype.zoomMap = function(evt) {
var map = this.map_,
delta = ((evt.deltaY / 3) | 0);
if (Math.abs(delta) === 0) {
return;
}
map.setZoom(map.getZoom()-delta, map.getEvents().getPointerPosition(evt));
var me = this;
if (evt.deltaY === 0 || me.zoomBlocked_) {
return;
}
me.zoomBlocked_ = window.setTimeout(function() {
me.zoomBlocked_ = null;
}, 200);
var map = me.map_,
step = evt.deltaY / Math.abs(evt.deltaY);
map.setZoom(map.getZoom()-step, map.getEvents().getPointerPosition(evt));
// We don't want the page to scroll.
evt.preventDefault();
return false;