OpenLayers图形附加数据与回调

OpenLayers的feature有个feature.values_.data属性，可以为其附加各种自定义数据。

当创建一个feature时：

var myData = {
	value0: '文本',
	leftClickCallback: function(params) {},
	leftClickCallbackParams: {value: 1},
	rightClickCallback: function(params) {},
	rightClickCallbackParams: {value: 2}
};
var feature = new ol.Feature({
    geometry: new ol.geom.Point([0,0]),
    data: myData
});

这样就为创建的点feature附加了自定义的数据。

当获取到该点feature时，通过其feature.values_.data属性即可拿到自定义的数据。

若需要点击回调或者执行自定义操作，那么将所要执行的函数和参数从该data中取出，然后将参数传给函数调用即可。

// 左键点击交互
map.on("click", function(event) {
	var pixel = map.getEventPixel(event.originalEvent);
	map.forEachFeatureAtPixel(pixel, function(feature, layer) {
		if(feature) {
			var data = feature.values_.data;
			if(data && data.leftClickCallback) {
				event.clickPoint = self.map.getEventCoordinate(event);
				data.leftClickCallback(event, feature, data.leftClickCallbackParams);
			}
		}
	});
});
// 右键点击交互
$(map.getViewport()).on("contextmenu", function(event) {
    event.preventDefault(); //屏蔽自带的右键事件
    var pixel = [event.offsetX, event.offsetY];
    var feature = map.forEachFeatureAtPixel(pixel, function(feature) {
        return feature;
    });

    if(feature) {
        var data = feature.values_.data;
        if(data && data.rightClickCallback) {
            event.clickPoint = map.getEventCoordinate(event);
            data.rightClickCallback(event, feature, data.rightClickCallbackParams);
        }
    }
});

转载自：https://blog.csdn.net/fyyyr/article/details/82959353