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Listen for feature events and fire layer events

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This commit is contained in:
Tim Schaub
2013-10-03 15:16:34 -06:00
parent adf99d592a
commit 67fab12fef
2 changed files with 64 additions and 4 deletions
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37
src/ol/layer/vectorlayer.js
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@@ -3,9 +3,11 @@ goog.provide('ol.layer.VectorEventType');
goog.require('goog.array');
goog.require('goog.asserts');
goog.require('goog.events');
goog.require('goog.events.Event');
goog.require('goog.object');
goog.require('ol.Feature');
goog.require('ol.FeatureEventType');
goog.require('ol.extent');
goog.require('ol.layer.Layer');
goog.require('ol.proj');
@@ -114,16 +116,18 @@ ol.layer.FeatureCache.prototype.getFeatureWithUid = function(uid) {
/**
* Remove a feature from the cache.
* @param {ol.Feature} feature Feature.
* @param {ol.Extent=} opt_extent Optional extent (used when the current feature
* extent is different than the one in the index).
*/
ol.layer.FeatureCache.prototype.remove = function(feature) {
ol.layer.FeatureCache.prototype.remove = function(feature, opt_extent) {
var id = goog.getUid(feature).toString(),
geometry = feature.getGeometry();
delete this.idLookup_[id];
// index by bounding box
if (!goog.isNull(geometry)) {
this.rTree_.remove(geometry.getBounds(), feature);
var extent = goog.isDef(opt_extent) ? opt_extent : geometry.getBounds();
this.rTree_.remove(extent, feature);
}
};
@@ -181,19 +185,44 @@ ol.layer.Vector.prototype.addFeatures = function(features) {
if (!goog.isNull(geometry)) {
ol.extent.extend(extent, geometry.getBounds());
}
goog.events.listen(feature, ol.FeatureEventType.CHANGE,
this.handleFeatureChange_, false, this);
}
this.dispatchEvent(new ol.layer.VectorEvent(ol.layer.VectorEventType.ADD,
features, [extent]));
};
/**
* Listener for feature change events.
* @param {ol.FeatureEvent} evt The feature change event.
* @private
*/
ol.layer.Vector.prototype.handleFeatureChange_ = function(evt) {
goog.asserts.assertInstanceof(evt.target, ol.Feature);
var feature = /** @type {ol.Feature} */ (evt.target);
var extents = [];
if (!goog.isNull(evt.oldExtent)) {
extents.push(evt.oldExtent);
}
var geometry = feature.getGeometry();
if (!goog.isNull(geometry)) {
this.featureCache_.remove(feature, evt.oldExtent);
this.featureCache_.add(feature);
extents.push(geometry.getBounds());
}
this.dispatchEvent(new ol.layer.VectorEvent(ol.layer.VectorEventType.CHANGE,
[feature], extents));
};
/**
* Remove all features from the layer.
*/
ol.layer.Vector.prototype.clear = function() {
this.featureCache_.clear();
this.dispatchEvent(
new ol.layer.VectorEvent(ol.layer.VectorEventType.CHANGE, [], []));
new ol.layer.VectorEvent(ol.layer.VectorEventType.REMOVE, [], []));
};