打开图层点事件

Open Layers point event

本文关键字：事件 图层      更新时间：2023-09-26

是否有人有如何使用事件处理程序与开放层点的例子?

感谢
    function mapCreate(lon,lat){
        map = new OpenLayers.Map("map1");
        var osm = new OpenLayers.Layer.OSM();
        vectors = new OpenLayers.Layer.Vector("Vector Layer");
        map.addLayer(osm);
        var center = new OpenLayers.LonLat(lon,lat).transform(
            new OpenLayers.Projection("EPSG:4326"),
            map.getProjectionObject()
        );
        point = new OpenLayers.Geometry.Point(center.lon,center.lat);
        vectors.addFeatures([new OpenLayers.Feature.Vector(point)]);
        drag = new OpenLayers.Control.DragFeature(vectors);
        //map.addLayer(vectors);
        map.addControl(drag);
        drag.activate();
        map.setCenter(center, 15);
        map.addLayer(vectors);
        point.events.register('moveend',point, function(evt){
            alert('hello');
        });
    }

这是我尝试过的一个例子，由于某种原因，这部分不工作

point.events.register('moveend',point, function(evt){
                alert('hello');
            });

这里有一些类似的代码，我在过去使用它来在页面右侧的div列表上显示悬停标记。包括它是因为它展示了我过去是如何处理这些点的。我认为这不是你想要的。

/* Included for per-item hovering from the paginated layer. */
function onFeatureSelected(event) {
    hoveredItem = $(this).attr('lookup');
    /* Do something here to indicate the onhover */
    // find the layer pagination id
    var feature = findFeatureById(hoveredItem);
    if (feature) {
        // use the pagination id to find the event, and then trigger the click for that event to show the popup
        // also, pass a null event, since we don't necessarily have one. 
        feature.marker.events.listeners.click[0].func.call(feature, event)
    }
}
function onFeatureUnselected(event) {
    /* Do something here to indicate the onhover */
    // find the layer pagination id
    var feature = findFeatureById(hoveredItem);
    if (feature) {
        // use the pagination id to find the event, and then trigger the click for that event to show the popup
        // also, pass a null event, since we don't necessarily have one. 
        feature.marker.events.listeners.click[0].func.call(feature, event)
    }
    /* Do something here to stop the indication of the onhover */
    hoveredItem = null;
}
function findFeatureById(featureId) {
    for (var key in map.layers) {
        var layer = map.layers[key];
        if (layer.hasOwnProperty('features')) {
            for (var key1 in layer.features) {
                var feature = layer.features[key1];
                if (feature.hasOwnProperty('id') && feature.id == featureId) {
                    return feature;
                }
            }
        }
    }
    return null;
}

如果你想添加这个点，因为它正在创建，我将不得不刷新我的记忆在过去是如何完成的。另外，GIS SE应该对您有帮助。

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