我在D3网站上按照示例向Google地图添加标记。该示例正在运行,但现在我尝试使用以下方法将click事件处理程序绑定到每个标记:
d3.json("stations.json", function(data) {
var overlay = new google.maps.OverlayView();
// Add the container when the overlay is added to the map.
overlay.onAdd = function() {
var layer = d3.select(this.getPanes().overlayLayer).append("div")
.attr("class", "stations");
// Draw each marker as a separate SVG element.
// We could use a single SVG, but what size would it have?
overlay.draw = function() {
var projection = this.getProjection(),
padding = 10;
var marker = layer.selectAll("svg")
.data(d3.entries(data))
.each(transform) // update existing markers
.enter().append("svg:svg")
.each(transform)
.attr("class", "marker")
.on("click", function(d) { console.log(d); });
// Add a circle.
marker.append("svg:circle")
.attr("r", 4.5)
.attr("cx", padding)
.attr("cy", padding);
// Add a label.
marker.append("svg:text")
.attr("x", padding + 7)
.attr("y", padding)
.attr("dy", ".31em")
.text(function(d) { return d.key; });
function transform(d) {
d = new google.maps.LatLng(d.value[1], d.value[0]);
d = projection.fromLatLngToDivPixel(d);
return d3.select(this)
.style("left", (d.x - padding) + "px")
.style("top", (d.y - padding) + "px");
}
};
};
// Bind our overlay to the map…
overlay.setMap(map);
});
但是,当我单击任何标记时,没有任何内容写入控制台。有谁知道我在哪里出错?
由于
答案 0 :(得分:3)
请注意以下行中的修正(overlayMouseTarget):
overlay.onAdd = function() {
//var layer = d3.select(this.getPanes().overlayLayer).append("div").attr("class", "stations");
var layer = d3.select(this.getPanes().overlayMouseTarget).append("div").attr("class", "stations");