我有一个带有不同节点的力导向图,我想在用户将鼠标悬停在其上时更改所选节点和所有连接(邻居)节点的颜色。
我想这样做..
function onMouseover(d){
node.style("fill", function(o){
var color = isConnected(d, o) ? 'red' : 'blue';
return color;
})
force.resume();
}
function isConnected(d, o){
return o.index === d,index ||
(d.children && d.children.indexOf(o.index) !== -1) ||
(o.children && o.children.indexOf(d.index) !== -1) ||
(o.parents && o.parents.indexOf(d.index) !== -1) ||
(d.parents && d.parents.indexOf(o.index) !== -1);
}
任何人都可以在这里帮助我,或者给我一些类似的d3图。
答案 0 :(得分:0)
这是一个基于Mike Bostock的Force-Directed Graph的演示,它改变了悬停节点及其直接连接节点的颜色:
var svg = d3.select("svg"),
width = +svg.attr("width"),
height = +svg.attr("height");
var color = d3.scaleOrdinal(d3.schemeCategory20);
var simulation = d3.forceSimulation()
.force("link", d3.forceLink().id(function(d) { return d.id; }))
.force("charge", d3.forceManyBody())
.force("center", d3.forceCenter(width / 2, height / 2));
d3.json("https://gist.githubusercontent.com/mbostock/4062045/raw/5916d145c8c048a6e3086915a6be464467391c62/miserables.json", function(error, graph) {
if (error) throw error;
var link = svg.append("g")
.attr("class", "links")
.selectAll("line")
.data(graph.links)
.enter().append("line")
.attr("stroke-width", function(d) { return Math.sqrt(d.value); });
var node = svg.append("g")
.attr("class", "nodes")
.selectAll("circle")
.data(graph.nodes)
.enter().append("circle")
.attr("r", 5)
.attr("fill", function(d) { return color(d.group); })
.call(d3.drag()
.on("start", dragstarted)
.on("drag", dragged)
.on("end", dragended));
node.append("title")
.text(function(d) { return d.id; });
node.on("mouseover", function(d) {
var connectedNodeIds = graph
.links
.filter(x => x.source.id == d.id || x.target.id == d.id)
.map(x => x.source.id == d.id ? x.target.id : x.source.id);
d3.select(".nodes")
.selectAll("circle")
.attr("fill", function(c) {
if (connectedNodeIds.indexOf(c.id) > -1 || c.id == d.id) return "red";
else return color(c.group);
});
});
node.on("mouseout", function(d) {
d3.select(".nodes")
.selectAll("circle")
.attr("fill", function(c) { return color(c.group); });
});
simulation
.nodes(graph.nodes)
.on("tick", ticked);
simulation.force("link")
.links(graph.links);
function ticked() {
link
.attr("x1", function(d) { return d.source.x; })
.attr("y1", function(d) { return d.source.y; })
.attr("x2", function(d) { return d.target.x; })
.attr("y2", function(d) { return d.target.y; });
node
.attr("cx", function(d) { return d.x; })
.attr("cy", function(d) { return d.y; });
}
});
function dragstarted(d) {
if (!d3.event.active) simulation.alphaTarget(0.3).restart();
d.fx = d.x;
d.fy = d.y;
}
function dragged(d) {
d.fx = d3.event.x;
d.fy = d3.event.y;
}
function dragended(d) {
if (!d3.event.active) simulation.alphaTarget(0);
d.fx = null;
d.fy = null;
}

.links line {
stroke: #999;
stroke-opacity: 0.6;
}
.nodes circle {
stroke: #fff;
stroke-width: 1.5px;
}

<svg width="500" height="350"></svg>
<script src="https://d3js.org/d3.v4.min.js"></script>
&#13;
在鼠标悬停期间,我们的想法是:
这样:
node.on("mouseover", function(d) {
var connectedNodeIds = graph
.links
.filter(x => x.source.id == d.id || x.target.id == d.id)
.map(x => x.source.id == d.id ? x.target.id : x.source.id);
d3.select(".nodes")
.selectAll("circle")
.attr("fill", function(c) {
if (connectedNodeIds.indexOf(c.id) > -1 || c.id == d.id) return "red";
else return color(c.group);
});
});
在mouseout期间,我们会遍历所有节点并设置原始颜色:
node.on("mouseout", function(d) {
d3.select(".nodes")
.selectAll("circle")
.attr("fill", function(c) { return color(c.group); });
});