DrawPanelOptions onFeatureAdded

Question

我们正在开发我们的Gis应用程序，我使用的是gwt-openlayers，我们正在创建Vaadin包装器。

因此，我扩展了MapWidget，创建了所需的层和向量层，并添加了一个DrawFeatureControl：

    DrawFeatureOptions drawFeatureOptions = new DrawFeatureOptions();
        private DrawFeature drawFeaturePoint = = new DrawFeature(vectorLayer, new PointHandler(), drawFeatureOptions);

为了赶上这一事件：

    getWidget().getDrawFeatureOptions().onFeatureAdded(new () {
        @Override
        public void (com.openlayers.client.feature.VectorFeature vectorFeature) {
            Window.alert("Feature Added" + vectorFeature.getFID()); 
            serverRpc.featureAdded(buildVectorFeature(vectorFeature)); 
        }
    });

由于某些原因，这是不起作用的；尽管以下内容几乎应该是相同的，但工作正常：

    getWidget().getVectorLayer().addVectorFeatureSelectedListener(new () {
        @Override
        public void onFeatureSelected(FeatureSelectedEvent eventObject) { 
serverRpc.featureSelected(buildVectorFeature(eventObject.getVectorFeature())); 
        }
    }); 

在向量层上使用(addVectorFeatureAddedListener)将在每次向VectorLayer中添加特性时触发，并且在使用DrawFeatureControl时不会触发。有人能帮助我捕捉使用DrawFeatureControl绘制的特性吗？

顺便说一句，我在BBox上有一个集群和MapWidget分层，我不知道这是否改变了什么。

Answer 1

我找到了，因为某种原因

getDrawFeatureOptions().onFeatureAdded 

做不到这一点，我不得不使用以下方法在GWT中注入侦听器：

getWidget().getDrawFeaturePoint().eventListeners.addListener(getWidget().getDrawFeaturePoint(), featurePointAddedlistener, EventType.VECTOR_FEATURE_ADDED, new EventHandler() {
    @Override
    public void onHandle(EventObject eventObject) {
        FeatureAddedEvent e = new FeatureAddedEvent(eventObject);
        featurePointAddedlistener.onFeatureAdded(e);
    }
}); 

Answer 2

您是否知道Vaadin为OpenLayers在Vaadin中使用OpenLayers提供了自己的包装？

https://vaadin.com/directory#addon/openlayers-wrapper