javascript D3 和鼠标事件，单击测试不起作用
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D3 and mouse events, click test not working
提问by CQM
I am not sure why my click method is not working. In this test I want to be able to click on one of the circle nodes on the graph and display its number. Hovering over works kind of.
我不确定为什么我的点击方法不起作用。在此测试中，我希望能够单击图形上的圆形节点之一并显示其编号。将鼠标悬停在作品上。
What library's click event am I using, D3? Jquery? normal JS?
我使用的是什么库的点击事件，D3？查询？普通JS？
ultimately I want to do tooltips when I hover over the nodes, and make them go away when I move the mouse away
最终我想在我将鼠标悬停在节点上时做工具提示，并在我将鼠标移开时让它们消失
http://jsfiddle.net/ericps/b5v4R/
http://jsfiddle.net/ericps/b5v4R/
dots.enter()
.append("circle")
//.append("svg:circle")
.attr("class", "dot")
.attr("cx", complete_line.x())
.attr("cy", complete_line.y())
.attr("r",3.5)
.append("title")
.text(function(d){ return d.completed;})
.on("click", function(d) { alert("hello"); });
回答by nautat
You've attached the event handler to svg:text element. I think you want to attach it to the svg:circle element:
您已将事件处理程序附加到 svg:text 元素。我想你想把它附加到 svg:circle 元素：
dots.enter().append("circle")
.attr("class", "dot")
.attr("cx", complete_line.x())
.attr("cy", complete_line.y())
.attr("r",3.5)
.on("click", function(d) { alert("hello"); })
.append("title")
.text(function(d){ return d.completed; });
