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Adding paging and cluster strategies. The paging strategy intercepts a batch of features bound for the layer and caches them, giving the layer one page at a time. The cluster strategy intercepts a batch of features and groups proximate features as clusters - giving the clusters to the layer instead. Thanks for the careful review Erik. r=euzuro (see #1606).

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git-svn-id: http://svn.openlayers.org/trunk/openlayers@8003 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf
This commit is contained in:
Tim Schaub
2008-09-12 08:58:23 +00:00
parent 3ad82c119a
commit 4ad8f2118c
10 changed files with 1697 additions and 5 deletions
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26
lib/OpenLayers/Layer/Vector.js
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@@ -38,7 +38,12 @@ OpenLayers.Layer.Vector = OpenLayers.Class(OpenLayers.Layer, {
* Supported map event types (in addition to those from <OpenLayers.Layer>):
* - *beforefeatureadded* Triggered before a feature is added. Listeners
* will receive an object with a *feature* property referencing the
* feature to be added.
* feature to be added. To stop the feature from being added, a
* listener should return false.
* - *beforefeaturesadded* Triggered before an array of features is added.
* Listeners will receive an object with a *features* property
* referencing the feature to be added. To stop the features from
* being added, a listener should return false.
* - *featureadded* Triggered after a feature is added. The event
* object passed to listeners will have a *feature* property with a
* reference to the added feature.
@@ -72,7 +77,8 @@ OpenLayers.Layer.Vector = OpenLayers.Class(OpenLayers.Layer, {
* - *refresh* Triggered when something wants a strategy to ask the protocol
* for a new set of features.
*/
EVENT_TYPES: ["beforefeatureadded", "featureadded", "featuresadded",
EVENT_TYPES: ["beforefeatureadded", "beforefeaturesadded",
"featureadded", "featuresadded",
"beforefeatureremoved", "featureremoved", "featuresremoved",
"beforefeatureselected", "featureselected", "featureunselected",
"beforefeaturemodified", "featuremodified", "afterfeaturemodified",
@@ -443,6 +449,15 @@ OpenLayers.Layer.Vector = OpenLayers.Class(OpenLayers.Layer, {
}
var notify = !options || !options.silent;
if(notify) {
var event = {features: features};
var ret = this.events.triggerEvent("beforefeaturesadded", event);
if(ret === false) {
return;
}
features = event.features;
}
for (var i=0, len=features.length; i<len; i++) {
if (i != (features.length - 1)) {
@@ -469,9 +484,10 @@ OpenLayers.Layer.Vector = OpenLayers.Class(OpenLayers.Layer, {
}
if (notify) {
this.events.triggerEvent("beforefeatureadded", {
feature: feature
});
if(this.events.triggerEvent("beforefeatureadded",
{feature: feature}) === false) {
continue;
};
this.preFeatureInsert(feature);
}