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Unregister previous event listeners, if any.

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Thanks for spotting this, @twpayne.
This commit is contained in:
Marc Jansen
2013-03-12 16:18:25 +01:00
parent d77a8b0a1d
commit bc07722816
1 changed files with 32 additions and 6 deletions
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38
src/ol/control/zoomslidercontrol.js
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@@ -76,6 +76,18 @@ ol.control.ZoomSlider = function(zoomSliderOptions) {
*/
this.direction_ = ol.control.ZoomSlider.direction.VERTICAL;
/**
* @private
* @type {Array.<?number>}
*/
this.mapListenerKeys_ = null;
/**
* @private
* @type {Array.<?number>}
*/
this.draggerListenerKeys_ = null;
var elem = this.createDom_();
this.dragger_ = this.createDraggable_(elem);
@@ -159,8 +171,16 @@ ol.control.ZoomSlider.prototype.setMap = function(map) {
* @private
*/
ol.control.ZoomSlider.prototype.initMapEventListeners_ = function() {
goog.events.listen(this.getMap(), ol.MapEventType.POSTRENDER,
this.handleMapPostRender_, undefined, this);
if (!goog.isNull(this.mapListenerKeys_)) {
goog.array.forEach(this.mapListenerKeys_, goog.events.unlistenByKey);
this.mapListenerKeys_ = null;
}
if (!goog.isNull(this.getMap())) {
this.mapListenerKeys_ = [
goog.events.listen(this.getMap(), ol.MapEventType.POSTRENDER,
this.handleMapPostRender_, undefined, this)
];
}
};
@@ -325,11 +345,17 @@ ol.control.ZoomSlider.prototype.handleSliderChange_ = function(e) {
* @private
*/
ol.control.ZoomSlider.prototype.createDraggable_ = function(elem) {
if (!goog.isNull(this.draggerListenerKeys_)) {
goog.array.forEach(this.draggerListenerKeys_, goog.events.unlistenByKey);
this.draggerListenerKeys_ = null;
}
var dragger = new goog.fx.Dragger(elem.childNodes[0]);
dragger.addEventListener(goog.fx.Dragger.EventType.DRAG,
this.handleSliderChange_, undefined, this);
dragger.addEventListener(goog.fx.Dragger.EventType.END,
this.handleSliderChange_, undefined, this);
this.draggerListenerKeys_ = [
goog.events.listen(dragger, [
goog.fx.Dragger.EventType.DRAG,
goog.fx.Dragger.EventType.END
], this.handleSliderChange_, undefined, this)
];
return dragger;
};