使用以下 D3 Sankey 代码(可以编辑实时 here)。
我正在尝试将点击事件附加到附加的 rect
元素,如下所示:
.append("rect").on("click", function() { alert("hello") })
但是当用户点击时什么也没有发生。但是,这确实有效:
.append("rect").on("mousedown", function() { alert("hello") })
这是代码。注意下半部的 click
行,在附加的 rect 行上:
// set the dimensions and margins of the graph
var margin = {top: 10, right: 10, bottom: 10, left: 10},
width = 450 - margin.left - margin.right,
height = 480 - margin.top - margin.bottom;
// append the svg object to the body of the page
var svg = d3.select("#my_dataviz").append("svg")
.attr("width", width + margin.left + margin.right)
.attr("height", height + margin.top + margin.bottom)
.append("g")
.attr("transform",
"translate(" + margin.left + "," + margin.top + ")");
// Color scale used
var color = d3.scaleOrdinal(d3.schemeCategory20);
// Set the sankey diagram properties
var sankey = d3.sankey()
.nodeWidth(36)
.nodePadding(290)
.size([width, height]);
// load the data
d3.json("https://raw.githubusercontent.com/holtzy/D3-graph-gallery/master/DATA/data_sankey.json", function(error, graph) {
// Constructs a new Sankey generator with the default settings.
sankey
.nodes(graph.nodes)
.links(graph.links)
.layout(1);
// add in the links
var link = svg.append("g")
.selectAll(".link")
.data(graph.links)
.enter()
.append("path")
.attr("class", "link")
.attr("d", sankey.link() )
.style("stroke-width", function(d) { return Math.max(1, d.dy); })
.sort(function(a, b) { return b.dy - a.dy; });
// add in the nodes
var node = svg.append("g")
.selectAll(".node")
.data(graph.nodes)
.enter().append("g")
.attr("class", "node")
.attr("transform", function(d) { return "translate(" + d.x + "," + d.y + ")"; })
.call(d3.drag()
.subject(function(d) { return d; })
.on("start", function() { this.parentNode.appendChild(this); })
.on("drag", dragmove));
// add the rectangles for the nodes
node
.append("rect")
.on("click", function(d) { alert("hello")})
.attr("height", function(d) { return d.dy; })
.attr("width", sankey.nodeWidth())
.style("fill", function(d) { return d.color = color(d.name.replace(/ .*/, "")); })
.style("stroke", function(d) { return d3.rgb(d.color).darker(2); })
// Add hover text
.append("title")
.text(function(d) { return d.name + "\n" + "There is " + d.value + " stuff in this node"; });
// add in the title for the nodes
node
.append("text")
.attr("x", -6)
.attr("y", function(d) { return d.dy / 2; })
.attr("dy", ".35em")
.attr("text-anchor", "end")
.attr("transform", null)
.text(function(d) { return d.name; })
.filter(function(d) { return d.x < width / 2; })
.attr("x", 6 + sankey.nodeWidth())
.attr("text-anchor", "start");
// the function for moving the nodes
function dragmove(d) {
d3.select(this)
.attr("transform",
"translate("
+ d.x + ","
+ (d.y = Math.max(
0, Math.min(height - d.dy, d3.event.y))
) + ")");
sankey.relayout();
link.attr("d", sankey.link() );
}
});
我无法获得点击事件来处理矩形。这看起来很奇怪,因为 mousedown
事件有效。