无法在D3 JavaScript库中获取点击事件 [英] Unable to get click event in D3 JavaScript library
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问题描述
我使用D3 JavaScript库将数据显示为强制定向标记。它工作正常。但我无法将点击事件添加到圈子中。所以当我点击圈子,我得到详细的分析,并在一个模态框中显示它。
I am using D3 JavaScript library to display data as a force directed marker. It works fine. But I am unable to add click event to the circle. so when I click on the circle, I get detailed analysis of the circle and display it in a modal box.
var links = [{source: "x", target:"y", type: "paid"},......]';
var nodes = {};
// Compute the distinct nodes from the links.
links.forEach(function(link) {
link.source = nodes[link.source] || (nodes[link.source] = {name: link.source});
link.target = nodes[link.target] || (nodes[link.target] = {name: link.target});
});
var w = 950,
h = 500;
var force = d3.layout.force()
.nodes(d3.values(nodes))
.links(links)
.size([w, h])
.linkDistance(60)
.charge(-300)
.on("tick", tick)
.start();
var svg = d3.select("#graph").append("svg:svg")
.attr("width", w)
.attr("height", h);
// Per-type markers, as they don't inherit styles.
svg.append("svg:defs").selectAll("marker")
.data(["suit", "licensing", "resolved"])
.enter().append("svg:marker")
.attr("id", String)
.attr("viewBox", "0 -5 10 10")
.attr("refX", 15)
.attr("refY", -1.5)
.attr("markerWidth", 6)
.attr("markerHeight", 6)
.attr("orient", "auto")
.append("svg:path")
.attr("d", "M0,-5L10,0L0,5");
var path = svg.append("svg:g").selectAll("path")
.data(force.links())
.enter().append("svg:path")
.attr("class", function(d) { return "link " + d.type; })
.attr("marker-end", function(d) { return "url(#" + d.type + ")"; });
var circle = svg.append("svg:g").selectAll("circle")
.data(force.nodes())
.enter().append("svg:circle")
.attr("r", 6)
.call(force.drag);
var text = svg.append("svg:g").selectAll("g")
.data(force.nodes())
.enter().append("svg:g");
// A copy of the text with a thick white stroke for legibility.
text.append("svg:text")
.attr("x", 8)
.attr("y", ".31em")
.attr("class", "shadow")
.text(function(d) { return d.name; });
text.append("svg:text")
.attr("x", 8)
.attr("y", ".31em")
.text(function(d) { return d.name; });
// Use elliptical arc path segments to doubly-encode directionality.
function tick() {
path.attr("d", function(d) {
var dx = d.target.x - d.source.x,
dy = d.target.y - d.source.y,
dr = Math.sqrt(dx * dx + dy * dy);
return "M" + d.source.x + "," + d.source.y + "A" + dr + "," + dr + " 0 0,1 " + d.target.x + "," + d.target.y;
});
circle.attr("transform", function(d) {
return "translate(" + d.x + "," + d.y + ")";
});
text.attr("transform", function(d) {
return "translate(" + d.x + "," + d.y + ")";
});
}
我尝试添加 .on 'alert(\'Hello world\')')
到 var circle
。它不能按预期工作。
I tried adding .on("click", 'alert(\'Hello world\')')
to var circle
. It does not work as expected. It alerts on load instead on click.
我感谢任何帮助
推荐答案
p>尝试:
var circle = svg.append("svg:g").selectAll("circle")
.data(force.nodes())
.enter().append("svg:circle")
.attr("r", 6)
.on("click", function(d,i) { alert("Hello world"); })
.call(force.drag);
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